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b/ThirdParty/freetype/docs/CHANGES deleted file mode 100644 index 5965a57..0000000 --- a/ThirdParty/freetype/docs/CHANGES +++ /dev/null @@ -1,5162 +0,0 @@ - -CHANGES BETWEEN 2.9.1 and 2.10 - - I. IMPORTANT CHANGES - - - A bunch of new functions has been added to access and process - COLR/CPAL data of OpenType fonts with color-layered glyphs. - - FT_Palette_Data_Get - Retrieve color palette data. - FT_Palette_Select - Select and activate a color palette for color-layered - glyphs. - FT_Palette_Set_Foreground_Color - Set text foreground color for palette index 0xFFFF. - - FT_Get_Color_Glyph_Layer - Get color layers for a given glyph (using an interator - object). - - FT_Bitmap_Blend - Blend one bitmap onto another with a given color. - - - An experimental feature is the new behaviour of the - `FT_LOAD_COLOR' load flag for color-layered glyphs: Internally - it sets a flag so that if `FT_Render_Glyph' is called with - `FT_RENDER_MODE_NORMAL' (or `FT_Load_Glyph' with - `FT_LOAD_RENDER'), a default blending of the color glyph layers - will happen automatically for convenience. - - - As a GSoC 2018 project, Nikhil Ramakrishnan completely - overhauled and modernized the API reference. - - - II. MISCELLANEOUS - - - The logic for computing the global ascender, descender, and - height of OpenType fonts has been slightly adjusted for - consistency. - - . If the `useTypoMetrics' flag (i.e., bit 7 in the `fsSelection' - field) in the `OS/2' table is set, use the `sTypo' fields in - `OS/2' unconditionally. - . Otherwise use the metrics data from the `hhea' table (if not - zero). - . Otherwise use the `sTypo' fields from the `OS/2' table (if not - zero). - . Otherwise use the `usWin' data from the `OS/2' table as a last - resort. - - Variable fonts will apply the `MVAR' deltas to whichever metrics - were picked. - - - `TT_Set_MM_Blend' could fail if call repeatedly with the same - arguments. - - - The precision of handling deltas in Variation Fonts has been - increased. The problem did only show up with multidimensional - designspaces. - - - New function `FT_Library_SetLcdGeometry' to set up the geometry - of LCD subpixels. - - - FreeType now uses the `defaultChar' property of PCF fonts to set - the glyph for the undefined character at glyph index 0 (as - FreeType already does for all other supported font formats). As - a consequence, the order of glyphs of a PCF font if accessed - with FreeType can be different now compared to previous - versions. - - This change doesn't affect PCF font access with cmaps. - - - `FT_Select_Charmap' has been changed to allow parameter value - `FT_ENCODING_NONE', which is valid for BDF, PCF, and Windows FNT - formats to access built-in cmaps that don't have a predefined - `FT_Encoding' value. - - - A previously reserved field in the `FT_GlyphSlotRec' structure - now holds the glyph index. - - - On Win32 platforms, the use of `_DLL' to build the library has - been replaced with `DLL_EXPORT' and `DLL_IMPORT'. - - - The usual round of fuzzer bug fixes to better reject malformed - fonts. - - - `FT_Outline_New_Internal' and `FT_Outline_Done_Internal' have - been removed. These two functions were public by oversight only - and were never documented. - - - A new function `FT_Error_String' returns descriptions of error - codes if configuration macro FT_CONFIG_OPTION_ERROR_STRINGS is - defined. - - - `FT_Set_MM_WeightVector' and `FT_Get_MM_WeightVector' are new - functions limited to Adobe MultiMaster fonts to directly set and - get the weight vector. - - - Support for Position Independent Code as needed by systems that - prohibit automatic address fixups, such as BREW, has been - removed. [Compilation with modern compilers that use flags like - `-fPIC' or `-fPIE' is not affected.] - - - The `ftdump' demo program has new options `-c' and `-C' to - display charmaps in compact and detailed format, respectively. - Option `-V' has been removed. - - - The `ftview', `ftstring', and `ftgrid' demo programs use a new - command line option `-d' to specify the program window's width, - height, and color depth. - - - The `ftview' demo program now displays red boxes for zero-width - glyphs. - - - `ftglyph' has limited support to display fonts with - color-layered glyphs. This will be improved later on. - - - `ftgrid' can now display bitmap fonts also. - - - The `ttdebug' demo program has a new option `-f' to select a - member of a TrueType collection (TTC). - - - Other various improvements to the demo programs. - - -====================================================================== - -CHANGES BETWEEN 2.9 and 2.9.1 - - I. IMPORTANT BUG FIXES - - - Type 1 fonts containing flex features were not rendered - correctly (bug introduced in version 2.9). - - - CVE-2018-6942: Older FreeType versions can crash with certain - malformed variation fonts. - - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6942 - - - II. MISCELLANEOUS - - - Bug fix: Multiple calls to `FT_Get_MM_Var' returned garbage. - - - The base extensions `ftlcdfil' and `ftfntfmt' are now part of - the base module (and thus no longer configurable in file - `modules.cfg'). - - - Emboldening of bitmaps didn't work correctly sometimes, showing - various artifacts (bug introduced in version 2.8.1). - - - Use of the `freetype-config' script to get compilation and - linking options is deprecated since it doesn't support - cross-compiling, among other deficiencies. Instead, you should - use the `pkg-config' interface. - - The `configure' script no longer installs `freetype-config' by - default. For backwards compatibility, a new configure option - `--enable-freetype-config' is provided that reverts this - decision. - - - The auto-hinter script ranges have been updated for Unicode 11. - No support for new scripts have been added, however, with the - exception of Georgian Mtavruli. - - - Support for cmake has been improved. - - - The next release will remove support for Position Independent - Code as needed by systems that prohibit automatic address - fixups, such as BREW. [Compilation with modern compilers that - use flags like `-fPIC' or `-fPIE' is not affected.] - - -====================================================================== - -CHANGES BETWEEN 2.8.1 and 2.9 - - I. IMPORTANT BUG FIXES - - - Advance width values of variation fonts were often wrong. - - - More fixes for variation font support; you should update to this - version if you want to support them. - - - II. IMPORTANT CHANGES - - - As a GSoC project, Ewald Hew extended the new (Adobe) CFF engine - to handle Type 1 fonts also, thus greatly improving the - rendering of this format. This is the new default. The old - engine is still available if the configuration macro - `T1_CONFIG_OPTION_OLD_ENGINE' gets defined; using the - `hinting-engine' property of the `type1' driver module you can - then switch between the two engines. - - - A new function, `FT_Set_Named_Instance', can be used to set or - change the current named instance. - - - Starting with this FreeType version, resetting variation - coordinates will return to the currently selected named - instance. Previously, FreeType returned to the base font (i.e., - no instance set). - - - III. MISCELLANEOUS - - - The `face_flags' field of the `FT_Face' structure has a new bit, - `FT_FACE_FLAG_VARIATION', which is set if a variation font has - been altered with `FT_Set_MM_Design_Coordinates', - `FT_Set_Var_Design_Coordinates', or - `FT_Set_Var_Blend_Coordinates'. - - - If the current face is a named instance, the new macro - `FT_IS_NAMED_INSTANCE' returns true. - - - `FT_IS_VARIATION' is a new macro that returns true whenever a - face object has been altered by `FT_Set_MM_Design_Coordinates', - `FT_Set_Var_Design_Coordinates', or - `FT_Set_Var_Blend_Coordinates'. - - - Changing the design coordinates of a variation font with - `FT_Set_Var_Design_Coordinates' or - `FT_Set_Var_Blend_Coordinates' does not influence the named - instance index value (only `FT_Set_Named_Instance' does that). - - - Special PostScript names for named instances are only returned - if the named instance is set with `FT_Set_Named_Instance' (and - the font has corresponding entries in its `fvar' table). If - `FT_IS_VARIATION' returns true, the algorithmically derived - PostScript name is provided, not looking up special entries for - named instances. - - - A new function `FT_Done_MM_Var' is provided to free the memory - returned in a call to `FT_Get_MM_Var'. - - - On platforms using the `configure' script, the installed - `ftoption.h' file now correctly reflects configuration options - like `--with-harfbuzz'. - - - Better support to build FreeType as a DLL on Windows using - Visual C. - - - All data specific to driver modules is now collected in a single - file, `FT_DRIVER_H'. Consequently, the macros - `FT_AUTOHINTER_H', `FT_CFF_DRIVER_H', `FT_TRUETYPE_DRIVER_H', - and `FT_PCF_DRIVER_H' still work but are deprecated. - - - Some fuzzer fixes to better reject malformed fonts. - - - The `ftbench' demo program has a new test for opening a new face - and loading some glyphs. - - - The `ftbench' demo program has a new option `-j' to specify the - last glyph index to be used in the tests. - - - The `ftgrid' demo program has a new option `-n' to suppress - display of named instances of variation fonts. - - - The `ttdebug' demo program can now show a stack trace (key `K') - and switch between hexadecimal and decimal display of integers - (key `I'). - - -====================================================================== - -CHANGES BETWEEN 2.8 and 2.8.1 - - I. IMPORTANT BUG FIXES - - - B/W hinting of TrueType fonts didn't work properly if - interpreter version 38 or 40 was selected. - - - Some severe problems within the handling of TrueType Variation - Fonts were found and fixed. - - - Function `FT_Set_Var_Design_Coordinates' didn't correctly handle - the case with less input coordinates than axes. - - - II. IMPORTANT CHANGES - - - By default, FreeType now offers high quality LCD-optimized - output without resorting to ClearType techniques of resolution - tripling and filtering. In this method, called Harmony, each - color channel is generated separately after shifting the glyph - outline, capitalizing on the fact that the color grids on LCD - panels are shifted by a third of a pixel. This output is - indistinguishable from ClearType with a light 3-tap filter. - - - III. MISCELLANEOUS - - - Using the new function `FT_Get_Var_Axis_Flags', an application - can access the `flags' field of a variation axis (introduced in - OpenType version 1.8.2) - - - More sanity checks. - - - The internal representation of buffers for LCD rendering has - changed (to be more precise, the amount of padding gets computed - differently). Applications that use the FreeType API are not - affected. - - - To reset all design axis values of a variation font to its - default values you can now say - - error = FT_Set_Var_Design_Coordinates( face, 0, NULL ); - - This also works with functions `FT_Set_MM_Design_Coordinates' - and `FT_Set_MM_Blend_Coordinates'. - - - FreeType now synthesizes a missing Unicode cmap for (older) - TrueType fonts also if glyph names are available. - - - FreeType has improved handling of BDF fonts without the - `POINT_SIZE', `RESOLUTION_X', or `RESOLUTION_Y' properties; the - library now uses the values of the `SIZE' keyword if they are - missing. Previously, `SIZE' was completely ignored, and - FreeType used heuristic values instead. - - - Multiple calls to `FT_Bitmap_Convert' do work now as advertised. - Previously, they failed with an assertion error if there was an - empty bitmap between non-empty ones. - - - The warping option has moved from `light' to `normal' hinting - where it replaces the original hinting algorithm. The `light' - mode is now always void of any hinting in x-direction. - - - 16bit compiler support is now officially ended. We didn't - provide any maintenance since many years, and given that there - were no error or problem reports either it seems that it is no - longer needed. - - - The `ftgrid' demo program can now toggle the display of grid - lines with the `G' key. - - - The `ftgrid' demo program can toggle a different set of colors - (suitable to color-blind people) with the `C' key. - - - The `ftgrid' demo program now supports the `-e' command line - option to select a cmap. - - - The `ftdump' demo program has a new command line option `-t' to - output the SFNT table list. - - -====================================================================== - -CHANGES BETWEEN 2.7.1 and 2.8 - - I. IMPORTANT CHANGES - - - Support for OpenType Variation Fonts is now complete. The last - missing part was handling the `VVAR' and `MVAR' tables, which is - available with this release. - - - A new function `FT_Face_Properties' allows the control of some - module and library properties per font. Currently, the - following properties can be handled: stem darkening, LCD filter - weights, and the random seed for the `random' CFF operator. - - - The PCF change to show more `colorful' family names (introduced - in version 2.7.1) was too radical; it can now be configured with - PCF_CONFIG_OPTION_LONG_FAMILY_NAMES at compile time. If - activated, it can be switched off at run time with the new pcf - property `no-long-family-names'. If the `FREETYPE_PROPERTIES' - environment variable is available, you can say - - FREETYPE_PROPERTIES=pcf:no-long-family-names=1 - - - Support for the following scripts has been added to the - auto-hinter. - - Adlam, Avestan, Bamum, Buhid, Carian, Chakma, Coptic, Cypriot, - Deseret, Glagolitic, Gothic, Kayah, Lisu, N'Ko, Ol Chiki, Old - Turkic, Osage, Osmanya, Saurashtra, Shavian, Sundanese, Tai - Viet, Tifinagh, Unified Canadian Syllabics, Vai - - - II. IMPORTANT BUG FIXES - - - `Light' auto-hinting mode no longer uses TrueType metrics for - TrueType fonts. This bug was introduced in version 2.4.6, - causing horizontal scaling also. Almost all GNU/Linux - distributions (with Fedora as a notable exception) disabled the - corresponding patch for good reasons; chances are thus high that - you won't notice a difference. - - If optical backward compatibility for legacy applications is - necessary, you might enable the AF_CONFIG_OPTION_TT_SIZE_METRICS - configuration option. However, it is strongly recommended to - avoid that, adjusting font sizes instead. - - - Global size metrics values in the `FT_Size_Metrics' structure - can be different for TrueType fonts. Reason is that in older - FreeType versions the metrics were rounded differently to - integer pixels compared to all other font formats, yielding an - inconsistent behaviour if you used non-native hinting. Starting - with this version, global size metrics for TrueType fonts are - handled the same as other font formats: `ascender' gets rounded - up, `descender' gets rounded down, `height' gets normally - rounded, and `max_advance' gets normally rounded, too. - - If you need more precise values of (global) ascender, descender, - height, or `max_advance', please take the corresponding values - from the `FT_Face' structure and scale them manually. - - - If a TrueType font gets loaded with FT_LOAD_NO_HINTING, FreeType - now scales the font linearly again (bug introduced in version - 2.4.6). - - - CVE-2017-8105, CVE-2017-8287: Older FreeType versions have - out-of-bounds writes caused by heap-based buffer overflows - related to Type 1 fonts. - - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8105 - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8287 - - - III. MISCELLANEOUS - - - A new function `FT_Set_Default_Properties' has been added to - parse the `FREETYPE_PROPERTIES' environment variable - (previously, it was internal only). `FT_Init_FreeType' always - call this function, but `FT_New_Library' does not (similar to - `FT_Add_Default_Modules'). - - - To be in sync with OpenType version 1.7 and newer, macros - - FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY, - FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY, - TT_NAME_ID_PREFERRED_FAMILY - TT_NAME_ID_PREFERRED_SUBFAMILY - - are renamed to - - FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY, - FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY, - TT_NAME_ID_TYPOGRAPHIC_FAMILY - TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY - - The old macro names are deprecated (but still available). - - - Support for SFNT `name' tables has been improved. - - . Format 1 `name' tables are now supported. Use new function - `FT_Get_Sfnt_LangTag' to access associated language tags. - - . Language, encoding, and name IDs have been updated to OpenType - version 1.8.1. - - - The new CFF engine now handles the `random' operator. All CFF - opcodes are now supported. - - - The CFF module has a new property `random-seed' to control the - pseudo-random number generation for the `random' operator. - - - The `freetype-config' script is now a wrapper of `pkg-config' if - this program is available in the path. - - - FT_LOAD_TARGET_LCD is now a variant of FT_LOAD_TARGET_LIGHT; - this should provide better rendering results. - - - A mode to display light auto-hinting with subpixel positioning - has been added to `ftdiff'. - - -====================================================================== - -CHANGES BETWEEN 2.7 and 2.7.1 - - I. IMPORTANT CHANGES - - - Support for the new CFF2 font format as introduced with OpenType - 1.8 has been contributed by Dave Arnolds from Adobe. - - - Preliminary support for variation fonts as specified in OpenType - 1.8 (in addition to the already existing support for Adobe's MM - and Apple's GX formats). Dave Arnolds contributed handling of - advance width change variation; more will come in the next - version. - - - II. IMPORTANT BUG FIXES - - - Handling of raw CID fonts was partially broken (bug introduced - in 2.6.4). - - - CVE-2016-10328: Older FreeType versions had an out-of-bounds - write caused by a heap-based buffer overflow related to the CFF - fonts. - - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-10328 - - - III. MISCELLANEOUS - - - Some limits for TrueType bytecode execution have been tightened - to speed up FreeType's handling of malformed fonts, in - particular to quickly abort endless loops. - - - The number of twilight points can no longer be set to an - arbitrarily large value. - - - The total number of jump opcode instructions (like JMPR) with - negative arguments is dynamically restricted; the same holds - for the total number of iterations in LOOPCALL opcodes. - - The dynamic limits are based on the number of points in a glyph - and the number of CVT entries. Please report if you encounter a - font where the selected values are not adequate. - - - PCF family names are made more `colorful'; they now include the - foundry and information whether they contain wide characters. - For example, you no longer get `Fixed' but rather `Sony Fixed' - or `Misc Fixed Wide'. - - - A new function `FT_Get_Var_Blend_Coordinates' (with its alias - name `FT_Get_MM_Blend_Coordinates') to retrieve the normalized - blend coordinates of the currently selected variation instance - has been added to the Multiple Masters interface. - - - A new function `FT_Get_Var_Design_Coordinates' to retrieve the - design coordinates of the currently selected variation instance - has been added to the Multiple Masters interface. - - - A new load flag `FT_LOAD_BITMAP_METRICS_ONLY' to retrieve bitmap - information without loading the (embedded) bitmap itself. - - - Retrieving advance widths from bitmap strikes (using - `FT_Get_Advance' and `FT_Get_Advances') have been sped up. - - - The usual round of fuzzer fixes to better reject malformed - fonts. - - - The `ftmulti' demo program can now switch engines with key `H'. - - - The `ftstring' demo program can now show some built-in, - non-latin sample strings (to be selected with the TAB key). - - - The `ftview' demo program can now switch between a font's - charmaps using the TAB key. - - -====================================================================== - -CHANGES BETWEEN 2.6.5 and 2.7 - - I. IMPORTANT CHANGES - - - As announced earlier, the 2.7.x series now uses the new subpixel - hinting mode as the default, emulating a modern version of - ClearType. - - This change inevitably leads to different rendering results, and - you might change the `TT_CONFIG_OPTION_SUBPIXEL_HINTING' - configuration option to adapt it to your taste (or use the new - `FREETYPE_PROPERTIES' environment variable). See the - corresponding entry below for version 2.6.4, which gives more - information. - - - A new option `FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES' has been - introduced. If set (which is the default), an environment - variable `FREETYPE_PROPERTIES' can be used to control driver - properties. Example: - - FREETYPE_PROPERTIES=truetype:interpreter-version=35 \ - cff:no-stem-darkening=1 \ - autofitter:warping=1 - - This allows to select, say, the subpixel hinting mode at runtime - for a given application. See file `ftoption.h' for more. - - - II. IMPORTANT BUG FIXES - - - After loading a named instance of a GX variation font, the - `face_index' value in the returned `FT_Face' structure now - correctly holds the named instance index in the upper 16bits as - documented. - - - III. MISCELLANEOUS - - - A new macro `FT_IS_NAMED_INSTANCE' to test whether a given face - is a named instance. - - - More fixes to GX font handling. - - - Apple's `GETVARIATION' bytecode operator (needed for GX - variation font support) has been implemented. - - - Another round of fuzzer fixes, mainly to reject invalid fonts - faster. - - - Handling of raw CID fonts was broken (bug introduced in version - 2.6.4). - - - The smooth rasterizer has been streamlined to make it faster by - approx. 20%. - - - The `ftgrid' demo program now understands command line option - `-d' to give start-up design coordinates. - - - The `ftdump' demo program has a new command line option `-p' to - dump TrueType bytecode instructions. - - -====================================================================== - -CHANGES BETWEEN 2.6.4 and 2.6.5 - - I. IMPORTANT BUG FIXES - - - Compilation works again on Mac OS X (bug introduced in version - 2.6.4). - - - II. IMPORTANT CHANGES - - - The new subpixel hinting mode is now disabled by default; it - will be enabled by default in the forthcoming 2.7.x series. - Main reason for reverting this feature is the principle of least - surprise: a sudden change in appearance of all fonts (even if - the rendering improves for almost all recent fonts) should not - be expected in a new micro version of a series. - - -====================================================================== - -CHANGES BETWEEN 2.6.3 and 2.6.4 - - I. IMPORTANT CHANGES - - - A new subpixel hinting mode has been contributed by Nikolaus - Waxweiler, which is now the default rendering mode for TrueType - fonts. It implements (almost everything of) version 40 of the - bytecode engine. - - The existing code base in FreeType (the `Infinality code') was - stripped to the bare minimum and all configurability removed in - the name of speed and simplicity. The configurability was - mainly aimed at legacy fonts like Arial, Times New Roman, or - Courier. [Legacy fonts are fonts that modify vertical stems to - achieve clean black-and-white bitmaps.] The new mode focuses on - applying a minimal set of rules to all fonts indiscriminately so - that modern and web fonts render well while legacy fonts render - okay. - - Activation of the subpixel hinting support can be controlled - with the `TT_CONFIG_OPTION_SUBPIXEL_HINTING' configuration - option at compile time: If set to value 1, you get the old - Infinality mode (which was never the default due to its - slowness). Value 2 activates the new subpixel hinting mode, and - value 3 activates both. The default is value 2. - - At run time, you can select the subpixel hinting mode with the - `interpreter-version' property (provided you have compiled in - the corresponding hinting mode); see `ftttdrv.h' for more. - - - Support for the following scripts has been added to the - auto-hinter. - - Armenian, Cherokee, Ethiopic, Georgian, Gujarati, Gurmukhi, - Malayalam, Sinhala, Tamil - - - II. MISCELLANEOUS - - - Type 42 fonts as created by LilyPond are now supported. - - - Minor rendering improvements in the auto-hinter. - - - For experimental reasons, the old CFF engine now supports all - CFF operators except `random', including the deprecated Multiple - Masters instructions. This allows the display of fonts like - `ITCGaramondMM-It.otf' (without font variations, though). - - - Another round of fixes to improve handling of invalid fonts. - - - The `ftgrid' demo program now displays the rendered pixels also; - this can be switched off with the `b' key. Selection of various - LCD filtering modes can be done with the `L' key. - - - The demo programs have been extended to allow selection of all - available TrueType bytecode engines. - - - A very early beta version of a new, Qt based demo program called - `ftinspect' is part of the source code bundle; it will - eventually supersede the other demo programs. Currently, you - have to compile it manually with `qmake; make'; note that many - features are still missing. - - -====================================================================== - -CHANGES BETWEEN 2.6.2 and 2.6.3 - - I. IMPORTANT CHANGES - - - Khmer, Myanmar, Bengali, and Kannada script support has been - added to the auto-hinter. - - - II. MISCELLANEOUS - - - Better support of Indic scripts like Devanagari by using a - top-to-bottom hinting flow. - - - All FreeType macros starting with two underscores have been - renamed to avoid a violation of both the C and C++ standards. - Example: Header macros of the form `__FOO_H__' are now called - `FOO_H_'. In most cases, this should be completely transparent - to the user. The exception to this is `__FTERRORS_H__', which - must be sometimes undefined by the user to get FreeType error - strings: Both this form and the new `FTERRORS_H_' macro are - accepted for backward compatibility. - - - Minor improvements mainly to the Type 1 driver. - - - The new CFF engine now supports all Type 2 operators except - `random'. - - - The macro `_STANDALONE_', used for compiling the B/W and smooth - rasterizers as stand-alone modules, has been renamed to - `STANDALONE_', since macro names starting with an underscore and - followed by an uppercase letter are reserved in both C and C++. - - - Function `FT_Library_SetLcdFilterWeights' now also activates - custom LCD filter weights (instead of just adjusting them). - - - Support for `unpatented hinting' has been completely removed: - Consequently, the two functions `FT_Face_CheckTrueTypePatents' - and `FT_Face_SetUnpatentedHinting' now return always false, - doing nothing. - - - The `ftgamma' demo program has been modernized; the gamma grid - display has been moved from `ftview' to this program. - - - In `ftview', it is now possible to cycle through the available - LCD filtering modes. - - -====================================================================== - -CHANGES BETWEEN 2.6.1 and 2.6.2 - - I. IMPORTANT CHANGES - - - The auto-hinter now supports stem darkening, to be controlled by - the new `no-stem-darkening' and `darkening-parameters' - properties. This is an experimental feature contributed by - Nikolaus Waxweiler, and the interface might change in a future - release. - - - By default, stem darkening is now switched off (for both the CFF - engine and the auto-hinter). The main reason is that you need - linear alpha blending and gamma correction to get correct - rendering results, and the latter is not yet available in most - freely available rendering stacks like X11. Applying stem - darkening without proper gamma correction leads to far too dark - rendering results. - - - The meaning of `FT_RENDER_MODE_LIGHT' has been slightly - modified. It now essentially means `no hinting along the - horizontal axis'; in particular, no change of glyph advance - widths. Consequently, the auto-hinter is used for all scalable - font formats except for CFF. It is planned that other - font-specific rendering engines (TrueType, Type 1) will follow. - - - II. MISCELLANEOUS - - - The default LCD filter has been changed to be normalized and - color-balanced. - - - For better compatibility with FontConfig, function - `FT_Library_SetLcdFilter' accepts a new enumeration value - `FT_LCD_FILTER_LEGACY1' (which has the same meaning as - `FT_LCD_FILTER_LEGACY'). - - - A large number of bugs have been detected by using the libFuzzer - framework, which should further improve handling of invalid - fonts. Thanks again to Kostya Serebryany and Bungeman! - - - `TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES', a new configuration - option, controls the maximum number of executed opcodes within a - bytecode program. You don't want to change this except for very - special situations (e.g., making a library fuzzer spend less - time to handle broken fonts). - - - The smooth renderer has been made faster. - - - The `ftstring' demo program now supports subpixel rendering; use - key `l' to cycle through the LCD modes. - - - The `ftstring' demo program now supports color rendering; use - the `space' key to cycle through various color combinations. - - - The graphical demo programs now use a default gamma value of 1.8 - (instead of 1.2). - - -====================================================================== - -CHANGES BETWEEN 2.6 and 2.6.1 - - I. IMPORTANT BUG FIXES - - - It turned out that for CFFs only the advance widths should be - taken from the `htmx' table, not the side bearings. This bug, - introduced in version 2.6.0, makes it necessary to upgrade if - you are using CFFs; otherwise, you get cropped glyphs with GUI - interfaces like GTK or Qt. - - - Accessing Type 42 fonts returned incorrect results if the glyph - order of the embedded TrueType font differs from the glyph order - of the Type 42 charstrings table. - - - II. IMPORTANT CHANGES - - - The header file layout has been changed (again), moving all - header files except `ft2build.h' into a subdirectory tree. - - Doing so reduces the possibility of header file name clashes - (e.g., FTGL's `FTGlyph.h' with FreeType's `ftglyph.h') on case - insensitive file systems like Mac OS X or Windows. - - Applications that use (a) the `freetype-config' script or - FreeType's `freetype2.pc' file for pkg-config to get the include - directory for the compiler, and (b) the documented way for - header inclusion like - - #include - #include FT_FREETYPE_H - ... - - don't need any change to the source code. - - - Simple access to named instances in GX variation fonts is now - available (in addition to the previous method via FreeType's MM - interface). In the `FT_Face' structure, bits 16-30 of the - `face_index' field hold the current named instance index for the - given face index, and bits 16-30 of `style_flags' contain the - number of instances for the given face index. `FT_Open_Face' - and friends also understand the extended bits of the face index - parameter. - - You need to enable TT_CONFIG_OPTION_GX_VAR_SUPPORT for this new - feature. Otherwise, bits 16-30 of the two fields are zero (or - are ignored). - - - Lao script support has been added to the auto-hinter. - - - III. MISCELLANEOUS - - - The auto-hinter's Arabic script support has been enhanced. - - - Superscript-like and subscript-like glyphs as used by various - phonetic alphabets like the IPA are now better supported by the - auto-hinter. - - - The TrueType bytecode interpreter now runs slightly faster. - - - Improved support for builds with cmake. - - - The function `FT_CeilFix' now always rounds towards plus - infinity. - - - The function `FT_FloorFix' now always rounds towards minus - infinity. - - - A new load flag `FT_LOAD_COMPUTE_METRICS' has been added; it - makes FreeType ignore pre-computed metrics, as needed by font - validating or font editing programs. Right now, only the - TrueType module supports it to ignore data from the `hdmx' - table. - - - Another round of bug fixes to better handle broken fonts, found - by Kostya Serebryany . - - -====================================================================== - -CHANGES BETWEEN 2.5.5 and 2.6 - - I. IMPORTANT CHANGES - - - Behdad Esfahbod contributed code for improved thread-safety, - which results in the following model. - - * An `FT_Face' object can only be safely used from one thread at - a time. - - * An `FT_Library' object can now be used without modification - from multiple threads at the same time. - - * `FT_Face' creation and destruction with the same `FT_Library' - object can only be done from one thread at a time. - - One can use a single `FT_Library' object across threads as long - as a mutex lock is used around `FT_New_Face' and `FT_Done_Face'. - Any calls to `FT_Load_Glyph' and similar API are safe and do not - need the lock to be held as long as the same `FT_Face' is not - used from multiple threads at the same time. - - - Thai script support has been added to the auto-hinter. - - - Arabic script support has been added to the auto-hinter. - - - Following OpenType version 1.7, advance widths and side bearing - values in CFFs (wrapped in an SFNT structure) are now always - taken from the `hmtx' table. - - - Following OpenType version 1.7, the PostScript font name of a - CFF font (wrapped in an SFNT structure) is now always taken from - the `name' table. This is also true for OpenType Collections - (i.e., TTCs using CFFs subfonts instead of TTFs), where it may - have a significant difference. - - - Fonts natively hinted for ClearType are now supported, properly - handling selector index 3 of the INSTCTRL bytecode instruction. - - - Major improvements to the GX TrueType variation font handling. - - - II. MISCELLANEOUS - - - A new auto-hinter property `warping' can switch on and off the - warping code if this experimental feature is compiled in (by - defining the AF_CONFIG_OPTION_USE_WARPER configuration option; - by default this option is now enabled but warping is switched - off). - - The AF_CONFIG_OPTION_USE_WARPER option itself is an old feature, - available since 2006. Warping only works in `light' - auto-hinting mode. The idea of the code is to slightly scale - and shift a glyph along the non-hinted dimension (which is - usually the horizontal axis) so that as much of its segments are - aligned (more or less) to the grid. To find out a glyph's - optimal scaling and shifting value, various parameter - combinations are tried and scored. - - See file `ftautoh.h' for more; the demo programs `ftdiff', - `ftview', and `ftgrid' can toggle warping with key `w'. - - - Some fields in the `FTC_ImageTypeRec' structure have been - changed from signed to unsigned type, which better reflects the - actual usage. It is also an additional means to protect against - malformed input. - - This change doesn't break the ABI; however, it might cause - compiler warnings. - - - Function `FT_Bitmap_New' has been renamed to `FT_Bitmap_Init', - since this name better reflects its function. For backward - compatibility, the old function name is still available. - - - Function `FT_Get_X11_Font_Format' has been renamed to - `FT_Get_Font_Format', since this name better reflects its - function. For backward compatibility, the old function name is - still available. - - Additionally, the header file macro for this function has been - renamed to `FT_FONT_FORMATS_H' (the old name `FT_XFREE86_H' is - retained for backward compatibility). - - - Various improvements to the `ftgrid' demo program. - - . It can now display GX and MM fonts while interactively - manipulating the axes (with keys F2, F3, and F4). - - . Anti-aliasing rendering modes can now be selected (with keys - F5 and F6). - - . The display of point numbers can be toggled with key `D'. - - - Various improvements to the `ftdump' demo program. - - . It now displays information on MM and GX variation axes. - - . New command line option `-u' makes it output data in utf-8 - encoding. - - - The `ftmulti' demo program can now handle up to six MM or GX - axes. - - -====================================================================== - -CHANGES BETWEEN 2.5.4 and 2.5.5 - - I. IMPORTANT BUG FIXES - - - Handling of uncompressed PCF files works again (bug introduced - in version 2.5.4). - - -====================================================================== - -CHANGES BETWEEN 2.5.3 and 2.5.4 - - I. IMPORTANT BUG FIXES - - - A variant of vulnerability CVE-2014-2240 was identified - (cf. https://savannah.nongnu.org/bugs/?43661) and fixed in the - new CFF driver. All users should upgrade. - - - The new auto-hinter code using HarfBuzz crashed for some invalid - fonts. - - - Many fixes to better protect against malformed input. - - - II. IMPORTANT CHANGES - - - Full auto-hinter support of the Devanagari script. - - - Experimental auto-hinter support of the Telugu script. - - - CFF stem darkening behaviour can now be controlled at build time - using the eight macros - - CFF_CONFIG_OPTION_DARKENING_PARAMETER_{X,Y}{1,2,3,4} . - - - Some fields in the `FT_Bitmap' structure have been changed from - signed to unsigned type, which better reflects the actual usage. - It is also an additional means to protect against malformed - input. - - This change doesn't break the ABI; however, it might cause - compiler warnings. - - - III. MISCELLANEOUS - - - Improvements to the auto-hinter's algorithm to recognize stems - and local extrema. - - - Function `FT_Get_SubGlyph_Info' always returned an error even in - case of success. - - - Version 2.5.1 introduced major bugs in the cjk part of the - auto-hinter, which are now fixed. - - - The `FT_Sfnt_Tag' enumeration values have been changed to - uppercase, e.g. `FT_SFNT_HEAD'. The lowercase variants are - deprecated. This is for orthogonality with all other - enumeration (and enumeration-like) values in FreeType. - - - `cmake' now supports builds of FreeType as an OS X framework and - for iOS. - - - Improved project files for vc2010, introducing a property file. - - - The documentation generator for the API reference has been - updated to produce better HTML code (with proper CSS). At the - same time, the documentation got a better structure. - - - The FT_LOAD_BITMAP_CROP flag is obsolete; it is not used by any - driver. - - - The TrueType DELTAP[123] bytecode instructions now work in - subpixel hinting mode as described in the ClearType whitepaper - (i.e., for touched points in the non-subpixel direction). - - - Many small improvements to the internal arithmetic routines. - - -====================================================================== - -CHANGES BETWEEN 2.5.2 and 2.5.3 - - I. IMPORTANT BUG FIXES - - - A vulnerability (CVE-2014-2240) was identified and fixed in the - new CFF driver (cf. https://savannah.nongnu.org/bugs/?41697). - All users should upgrade. - - - More bug fixes related to correct positioning of composite - glyphs. - - - Many fixes to better protect against malformed input. - - - II. IMPORTANT CHANGES - - - FreeType can now use the HarfBuzz library to greatly improve the - auto-hinting of fonts that use OpenType features: Many glyphs - that are part of such features but don't have cmap entries are - now handled properly, for example small caps or superscripts. - Define the configuration macro FT_CONFIG_OPTION_USE_HARFBUZZ to - activate HarfBuzz support. - - You need HarfBuzz version 0.9.19 or newer. - - Note that HarfBuzz depends on FreeType; this currently causes a - chicken-and-egg problem that can be solved as follows in case - HarfBuzz is not yet installed on your system. - - 1. Compile and install FreeType without the configuration - macro FT_CONFIG_OPTION_USE_HARFBUZZ. - - 2. Compile and install HarfBuzz. - - 3. Define macro FT_CONFIG_OPTION_USE_HARFBUZZ, then compile - and install FreeType again. - - With FreeType's `configure' script the procedure boils down to - configure, build, and install FreeType, then configure, compile, - and install HarfBuzz, then configure, compile, and install - FreeType again (after executing `make distclean'). - - - All libraries FreeType depends on are now checked using the - `pkg-config' configuration files first, followed by alternative - methods. - - - The new value `auto' for the various `--with-XXX' library - options (for example `--with-harfbuzz=auto') makes the - `configure' script automatically link to the libraries it finds. - This is now the default. - - - In case FreeType's `configure' script can't find a library, you - can pass environment variables to circumvent pkg-config, and - those variables have been harmonized as a consequence of the - changes mentioned above: - - LIBZ -> removed; use LIBZ_CFLAGS and LIBZ_LIBS - LIBBZ2 -> removed; use BZIP2_CFLAGS and BZIP2_LIBS - LIBPNG_LDFLAGS -> LIBPNG_LIBS - - `./configure --help' shows all available environment variables. - - - The `freetype-config' script now understands option `--static' - to emit static linking information. - - -====================================================================== - -CHANGES BETWEEN 2.5.1 and 2.5.2 - - I. IMPORTANT BUG FIXES - - - Improving the display of some broken TrueType fonts introduced a - bug that made FreeType crash on some popular (but not fully - conformant) fonts like `ahronbd.ttf'. - - - Another round of improvements to correct positioning and hinting - of composite glyphs in TrueType fonts. - - - II. MISCELLANEOUS - - - Version 2.5.1 introduced a bug in handling embedded bitmap - strikes of TrueType fonts, causing garbage display under some - circumstances. - - - The `ftgrid' demo program couldn't be compiled in - non-development builds. - - -====================================================================== - -CHANGES BETWEEN 2.5 and 2.5.1 - - I. IMPORTANT BUG FIXES - - - For some WinFNT files, the last glyph wasn't displayed but - incorrectly marked as invalid. - - - The vertical size of glyphs was incorrectly set after a call to - `FT_GlyphSlot_Embolden', resulting in clipped glyphs. - - - Many fields of the `PCLT' table in SFNT based fonts (if accessed - with `FT_Get_Sfnt_Table') were computed incorrectly. - - - In TrueType fonts, hinting of composite glyphs could sometimes - deliver incorrect positions of components or even distorted - shapes. - - - II. IMPORTANT CHANGES - - - WOFF font format support has been added. - - - The auto-hinter now supports Hebrew. Greek and Cyrillic support - has been improved. - - - Support for the forthcoming `OS/2' SFNT table version 5, as can - be found e.g. in the `Sitka' font family for Windows 8.1. - - - The header file layout has been changed. After installation, - all files are now located in `/include/freetype2'. - - Applications that use (a) `freetype-config' or FreeType's - `pkg-config' file to get the include directory for the compiler, - and (b) the documented way for header inclusion like - - #include - #include FT_FREETYPE_H - ... - - don't need any change to the source code. - - - III. MISCELLANEOUS - - - The stem darkening feature of the new CFF engine can now be - fine-tuned with the new `darkening-parameters' property. - - - `ftgrid' has been updated to toggle various engines with the `H' - key, similar to `ftview' and `ftdiff'. - - - The functionality of `ttdebug' has been greatly enhanced. - - . It now displays twilight, storage, and control value data; key - `T' shows the twilight point table, key `S' the storage data, - and key `C' the control value table. - - . Some keys have been reassigned from lowercase to their - uppercase equivalents; for example `q' to quit the program is - now `Q'. - - . Key `f' finishes the current function. - - . Key `R' restarts the debugger. - - . Keys `b' and `p' set a breakpoint. - - . Key `B' provides a function call backtrace. - - - Better support of ARMv7 and x86_64 processors. - - - Apple's `sbix' color bitmap format is now supported. - - - Improved auto-hinter rendering for many TrueType fonts, - especially in the range 20-40ppem. - - - A new face flag `FT_FACE_FLAG_COLOR' has been added (to be - accessed with the macro `FT_HAS_COLOR'). - - - `FT_Gzip_Uncompress' (modeled after zlib's `uncompress' - function) has been added; this is a by-product of the newly - added WOFF support. - - - Support for a build with `cmake' has been contributed by John - Cary . - - - Support for x64 builds with Visual C++ has been contributed by - Kenneth Miller - - - Manual pages for most demo programs have been added. - - - The GETINFO bytecode instruction for TrueType fonts was buggy if - used to retrieve subpixel hinting information. It was necessary - to set selector bit 6 to get results for selector bits 7-10, - which is wrong. - - - Improved computation of emulated vertical metrics for TrueType - fonts. - - - Fixed horizontal start-up position of vertical phantom points in - TrueType bytecode. - - -====================================================================== - -CHANGES BETWEEN 2.4.12 and 2.5 - - I. IMPORTANT BUG FIXES - - - The cache manager function `FTC_Manager_Reset' didn't flush the - cache. - - - II. IMPORTANT CHANGES - - - Behdad Esfahbod (on behalf of Google) contributed support for - color embedded bitmaps (eg. color emoji). - - A new load flag, FT_LOAD_COLOR, makes FreeType load color - embedded-bitmaps, following this draft specification - - https://color-emoji.googlecode.com/git/specification/v1.html - - which defines two new SFNT tables, `CBDT' and `CBLC' (named and - modeled after `EBDT' and `EBLC', respectively). The color - bitmaps are stored in the new FT_PIXEL_MODE_BGRA format to - represent BGRA pre-multiplied sRGB images. If PNG support is - available, PNG color images as defined in the same proposed - specification are supported also. - - Note that color bitmaps are converted to grayscale if client - didn't ask for color. - - - As announced in the previous release, the old FreeType CFF - engine is now disabled by default. It can be conditionally - compiled by defining the configuration macro - CFF_CONFIG_OPTION_OLD_ENGINE. - - - As announced in the previous release, all code related to macro - FT_CONFIG_OPTION_OLD_INTERNALS has been removed, thus becoming - obsolete. - - - III. MISCELLANEOUS - - - The property API (`FT_Property_Get' and `FT_Property_Set') is - now declared as stable. - - The exception, however, are the experimental auto-hinter - properties `glyph-to-script-map' and `fallback-script' which are - subject to change in a forthcoming release. - - - `ftview' has been updated to support color embedded bitmaps; it - can be toggled on and off with key `c'. The small cache toggle - is now key `K'. - - - It is now possible to control the version of the TrueType - hinting engine using the new `interpreter-version' property of - the `truetype' module: Versions 35 and 38 (the default) are - supported, which roughly corresponds to disable and enable - subpixel hinting support, respectively. - - In both `ftview' and `ftdiff', switching between the two - versions can be done with key `H'. In the `ftbench' demo - program, command line option `-H' has been extended to activate - the non-default interpreter version. - - - The `ttdebug' program has been further improved. In particular, - it accepts a new command line option `-H' to select the hinting - engine. - - - `ftdump's verbose option has been renamed to `-V'. For all demo - programs, `-v' now shows version information. - - - Another round of TrueType subpixel hinting fixes. - - - The `apinames' tool can now create an import file for NetWare. - - - 64bit compilation of the new CFF engine was buggy. - - - Some fixes to improve robustness in memory-tight situations. - - -====================================================================== - -CHANGES BETWEEN 2.4.11 and 2.4.12 - - - We have another CFF parsing and hinting engine! Written by Dave - Arnold , this work has been contributed by - Adobe in collaboration with Google. It is vastly superior to - the old CFF engine, and it will replace it in the next release. - Right now, it is still off by default, and you have to - explicitly select it using the new `hinting-engine' property of - the cff driver: - - ... - #include FT_MODULE_H - #include FT_CFF_DRIVER_H - - FT_Library library; - int engine = FT_CFF_HINTING_ADOBE; - - - ... - FT_Property_Set( library, "cff", "hinting-engine", &engine ); - - The code has a (mature) beta status; we encourage all users to - test it and report any problems. - - In case you want to activate the new CFF engine unconditionally, - apply this patch: - ---- snip --- -diff --git a/src/cff/cffobjs.c b/src/cff/cffobjs.c -index ebcf189..3f2ce6b 100644 ---- a/src/cff/cffobjs.c -+++ b/src/cff/cffobjs.c -@@ -1056,7 +1056,7 @@ - - - /* set default property values */ -- driver->hinting_engine = FT_CFF_HINTING_FREETYPE; -+ driver->hinting_engine = FT_CFF_HINTING_ADOBE; - driver->no_stem_darkening = FALSE; - - return FT_Err_Ok; ---- snip --- - - - The macro FT_CONFIG_OPTION_OLD_INTERNALS is no longer set by - default. In the next release, we will completely remove the - associated code. Please update your programs in case you are - still using this macro. - - - II. MISCELLANEOUS - - - The (top-level) `configure' script now respects the MAKE - environment variable to specify a `make' binary. For backward - compatibility, GNUMAKE still overrides MAKE, though. - - - The `ftview' and `ftdiff' demo programs have been redesigned, - showing more options permanently on the screen, among other - minor improvements. - - - Using the `H' key, it is now possible to select the CFF engine - in both `ftview' and `ftdiff'. - - - The new command line option `-H' for `ftbench' selects the Adobe - CFF engine. - - - It is now possible to directly select the LCD rendering mode - with the keys `A'-`F' in `ftview'. The key mapping for cycling - through LCD modes has been changed from `K' and `L' to `k' and - `l', and toggling custom LCD filtering is no longer mapped to - key `F' but to key `L'. - - - In `ftdiff', key `x' toggles between layout modes: Either use - the advance width (this is new and now the default) or the - bounding box information to determine line breaks. - - - For all demo tools, the new command line option `-v' shows the - version. - - - For the demo tools with a GUI, the new command line options `-w' - and `-h' select the width and the height of the output window, - respectively. - - - The `ttdebug' program was broken and has been reactivated. Note - that this program is not compiled by default. - - -====================================================================== - -CHANGES BETWEEN 2.4.10 and 2.4.11 - - I. IMPORTANT BUG FIXES - - - Some vulnerabilities in the BDF implementation have been fixed. - Users of this font format should upgrade. - - - II. IMPORTANT CHANGES - - - Subpixel hinting support has been contributed by Infinality, - based on Greg Hitchcock's whitepaper at - - https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx - - Originally, it was a separate patch available from - - https://web.archive.org/web/20150710073951/http://www.infinality.net:80/blog/ - - and which has been integrated. - - Note that ClearType support is not completely implemented! In - particular, full support for the options `compatible_widths', - `symmetrical_smoothing, and `bgr' (via the GETINFO bytecode - instruction) is missing. - - Activation of subpixel hinting support can be controlled with - the `TT_CONFIG_OPTION_SUBPIXEL_HINTING' configuration option; it - is switched off by default. This feature is still experimental; - we welcome test reports! - - - Support for OpenType collections (OTC) has been added. - - - Pure CFF fonts within an SFNT wrapper are now supported. - - - III. MISCELLANEOUS - - - Minor rendering improvements to the auto-hinter. - - - `FT_GlyphSlot_Oblique' now uses a shear angle of 12°. - - - Experimental support to handle `property modules', for example - to control the behaviour of the auto-hinter. The API consists - of two new functions, `FT_Property_Set' and `FT_Property_Get'. - - The code is still subject to change and should not be used for - production. - - - The `ftdiff' demo program now supports UTF-8 encoded input files - for option `-f'. - - - Using keys `r' and `R', you can now adjust the stroker radius in - the `ftview' demo program. - - - Other, minor fixes and improvements. - - -====================================================================== - -CHANGES BETWEEN 2.4.9 and 2.4.10 - - I. IMPORTANT BUG FIXES - - - Incremental glyph loading as needed by ghostscript was broken. - - - II. MISCELLANEOUS - - - A new function `FT_Outline_EmboldenXY', contributed by Alexei - Podtelezhnikov. - - - In the `ftview' demo program, key `e' has been replaced with `x' - and `y' to embolden in the horizontal and vertical direction, - respectively. - - - The glyph spacing computation in `FT_GlyphSlot_Embolden' (and - similar code in `ftview') has been improved. - - - Minor improvements to the TrueType bytecode interpreter and - glyph loader, the auto-hinter, and the B/W rasterizer. - - -====================================================================== - -CHANGES BETWEEN 2.4.8 and 2.4.9 - - I. IMPORTANT BUG FIXES - - - Another round of fixes to better handle invalid fonts. Many of - them are vulnerabilities (see CVE-2012-1126 up to CVE-2012-1144 - and SA48320) so all users should upgrade. - - - II. MISCELLANEOUS - - - The `ENCODING -1 ' format of BDF fonts is now supported. - - - For BDF fonts, support for the whole Unicode encoding range has - been added. - - - Better TTF support for x_ppem != y_ppem. - - - `FT_Get_Advances' sometimes returned bogus values. - - - The demo programs no longer recognize and handle default - suffixes; you now have to always specify the complete font name. - - - Better rendering and LCD mode cycling added to `ftview'. - - -====================================================================== - -CHANGES BETWEEN 2.4.7 and 2.4.8 - - I. IMPORTANT BUG FIXES - - - Some vulnerabilities in handling CID-keyed PostScript fonts have - been fixed; see CVE-2011-3439. - - - II. MISCELLANEOUS - - - Chris Liddell contributed a new API, `FT_Get_PS_Font_Value', to - retrieve most of the dictionary keys in Type 1 fonts. - - -====================================================================== - -CHANGES BETWEEN 2.4.6 and 2.4.7 - - I. IMPORTANT BUG FIXES - - - Some vulnerabilities in handling Type 1 fonts have been fixed; - see CVE-2011-3256. - - - II. MISCELLANEOUS - - - FreeType now properly handles ZapfDingbats glyph names while - constructing a Unicode character map (for fonts which don't have - one). - - -====================================================================== - -CHANGES BETWEEN 2.4.5 and 2.4.6 - - I. IMPORTANT BUG FIXES - - - For TrueType based fonts, the ascender and descender values were - incorrect sometimes (off by a pixel if the ppem value was not a - multiple of 5). Depending on the use you might now experience - a different layout; the change should result in better, more - consistent line spacing. - - - Fix CVE-2011-0226 which causes a vulnerability while handling - Type 1 fonts. - - - BDF fonts containing glyphs with negative values for ENCODING - were incorrectly rejected. This bug has been introduced in - FreeType version 2.2.0. - - - David Bevan contributed a major revision of the FreeType stroker - code: - - . The behaviour of FT_STROKER_LINEJOIN_BEVEL has been corrected. - - . A new line join style, FT_STROKER_LINEJOIN_MITER_FIXED, has - been introduced to support PostScript and PDF miter joins. - - . FT_STROKER_LINEJOIN_MITER_VARIABLE has been introduced as an - alias for FT_STROKER_LINEJOIN_MITER. - - . Various stroking glitches has been fixed. - - - II. MISCELLANEOUS - - - SFNT bitmap fonts which contain an outline glyph for `.notdef' - only no longer set the FT_FACE_FLAG_SCALABLE flag. - - -====================================================================== - -CHANGES BETWEEN 2.4.4 and 2.4.5 - - I. IMPORTANT BUG FIXES - - - A rendering regression for second-order Bézier curves has been - fixed, introduced in 2.4.3. - - - II. IMPORTANT CHANGES - - - If autohinting is not explicitly disabled, FreeType now uses - the autohinter if a TrueType based font doesn't contain native - hints. - - - The load flag FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH has been made - redundant and is simply ignored; this means that FreeType now - ignores the global advance width value in TrueType fonts. - - - III. MISCELLANEOUS - - - `FT_Sfnt_Table_Info' can now return the number of SFNT tables of - a font. - - - Support for PCF files compressed with bzip2 has been contributed - by Joel Klinghed. To make this work, the OS must provide a - bzip2 library. - - - Bradley Grainger contributed project and solution files in - Visual Studio 2010 format. - - - Again some fixes to better handle broken fonts. - - - Some improvements to the B/W rasterizer. - - - Fixes to the cache module to improve robustness. - - - Just Fill Bugs contributed (experimental) code to compute blue - zones for CJK Ideographs, improving the alignment of horizontal - stems at the top or bottom edges. - - - The `ftgrid' demo program can now display autohinter segments, - to be toggled on and off with key `s'. - - -====================================================================== - -CHANGES BETWEEN 2.4.3 and 2.4.4 - - I. IMPORTANT BUG FIXES - - - UVS support (TrueType/OpenType cmap format 14) support is fixed. - This regression has been introduced in version 2.4.0. - - - II. MISCELLANEOUS - - - Detect tricky fonts (e.g. MingLiU) by the lengths and checksums - of Type42-persistent subtables (`cvt ', `fpgm', and `prep') when - a TrueType font without family name is given. The previous fix, - introduced in 2.4.3, was too rigorous, causing many subsetted - fonts (mainly from PDF files) displayed badly because FreeType - forced rendering with the TrueType bytecode engine instead of - the autohinter. - - - Better support for 64bit platforms. - - - More fixes to improve handling of broken fonts. - - -====================================================================== - -CHANGES BETWEEN 2.4.2 and 2.4.3 - - I. IMPORTANT BUG FIXES - - - Fix rendering of certain cubic, S-shaped arcs. This regression - has been introduced in version 2.4.0. - - - II. MISCELLANEOUS - - - To fix the above mentioned rendering issue, a new spline - flattening algorithm has been introduced which speeds up both - conic and cubic arcs. - - - Handling of broken fonts has been further improved. - - -====================================================================== - -CHANGES BETWEEN 2.4.1 and 2.4.2 - - I. IMPORTANT BUG FIXES - - - A stack overflow in CFF Type2 CharStrings interpreter is fixed. - - - Handling Type 42 font deallocation was broken; additionally, the - library is now more robust against malformed Type 42 fonts. - - - II. MISCELLANEOUS - - - Two new functions, `FT_Reference_Library' (in FT_MODULE_H) and - `FT_Reference_Face' (in FT_FREETYPE_H), have been added to - simplify life-cycle management. A counter gets initialized to 1 - at the time an FT_Library (or FT_Face) structure is created. - The two new functions increment the respective counter. - `FT_Done_Library' and `FT_Done_Face' then only destroy a library - or face if the counter is 1, otherwise they simply decrement the - counter. - - -====================================================================== - -CHANGES BETWEEN 2.4.0 and 2.4.1 - - I. IMPORTANT CHANGES - - - A serious bug in the CFF font module prevented display of many - glyphs in CFF fonts like `MinionPro-Regular.otf'. - - -====================================================================== - -CHANGES BETWEEN 2.3.12 and 2.4.0 - - I. IMPORTANT CHANGES - - - Since May 2010, all patents regarding the TrueType bytecode - interpreter have expired worldwide. Consequently, we now define - TT_CONFIG_OPTION_BYTECODE_INTERPRETER by default (and undefine - TT_CONFIG_OPTION_UNPATENTED_HINTING). - - - A new function `FT_Library_SetLcdFilterWeights' is available to - adjust the filter weights set by `FT_Library_SetLcdFilter'. - - - II. MISCELLANEOUS - - - Thanks to many reports from Robert Święcki, FreeType's stability - in handling broken or damaged fonts is much improved. - - - Support for LCD filter control has been added to the demo - programs `ftdiff' and `ftview'. - - -====================================================================== - -CHANGES BETWEEN 2.3.11 and 2.3.12 - - I. IMPORTANT CHANGES - - - For `FT_Open_Face', new parameters are available to ignore - preferred family names: FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY and - FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY. - - - II. MISCELLANEOUS - - - Support for incremental font loading (controlled with the - FT_CONFIG_OPTION_INCREMENTAL macro) is now active by default. - - - Better support for vertical metrics. - - - Various minor bug fixes. - - -====================================================================== - -CHANGES BETWEEN 2.3.10 and 2.3.11 - - I. IMPORTANT BUG FIXES - - - Version 2.3.10 broke PCF support. - - -====================================================================== - -CHANGES BETWEEN 2.3.10 and 2.3.9 - - I. IMPORTANT BUG FIXES - - - If all ASCII digits in a font have the same (unscaled) width, - the autohinter respects this and won't change it. - - - TrueType fonts are now rasterized correctly if the horizontal - and vertical resolution differ. - - - Type 1 fonts are now handled with increased precision internally - to avoid serious rounding issues if non-integral coordinates are - encountered. - - - Horizontally condensed CFF fonts (using the font matrix) were - rendered incorrectly. This bug has been introduced after - release 2.3.5. - - - II. IMPORTANT CHANGES - - - Support for the SFNT cmap 13 table format (as defined by the new - OpenType 1.6 specification) has been added. - - - B/W rasterization of well-hinted TrueType fonts at small sizes - has been greatly improved. - - - Calculation of vertical metrics in OpenType fonts has been - improved. - - - III. MISCELLANEOUS - - - It is now possible to change the emboldening factor in the - `ftview' demo program with keys `e' and `E'. - - - It is now possible to change the slant value in the `ftview' - demo program with keys `s' and `S'. - - - The 5-levels grayscale mode of the `ftraster' module (which - FreeType doesn't use by default) was broken since version 2.3.0. - - - Compilation of the `ftgrays' and `ftraster' modules was broken - in stand-alone mode. - - - Various fixes for compilation on 64bit and 16bit architectures. - - -====================================================================== - -CHANGES BETWEEN 2.3.9 and 2.3.8 - - I. IMPORTANT BUG FIXES - - - Very unfortunately, FreeType 2.3.8 contained a change that broke - its official ABI. The end result is that programs compiled - against previous versions of the library, but dynamically linked - to 2.3.8 can experience memory corruption if they call the - `FT_Get_PS_Font_Info' function. - - We recommend all users to upgrade to 2.3.9 as soon as possible, - or to downgrade to a previous release of the library if this is - not an option. - - The origin of the bug is that a new field was added to the - publicly defined `PS_FontInfoRec' structure. Unfortunately, - objects of this type can be stack or heap allocated by callers - of `FT_Get_PS_Font_Info', resulting in a memory buffer - overwrite with its implementation in 2.3.8. - - If you want to know whether your code is vulnerable to this - issue, simply search for the substrings `PS_FontInfo' and - `PS_Font_Info' in your source code. If none is found, your code - is safe and is not affected. - - The FreeType team apologizes for the problem. - - - The POSIX support of MacOS resource-fork fonts (Suitcase fonts - and LaserWriter Type1 PostScript fonts) was broken in 2.3.8. If - FreeType2 is built without Carbon framework, these fonts are not - handled correctly. Version 2.3.7 didn't have this bug. - - - `FT_Get_Advance' (and `FT_Get_Advances') returned bad values for - almost all font formats except TrueType fonts. - - - Fix a bug in the SFNT kerning table loader/parser which could - crash the engine if certain malformed tables were encountered. - - - Composite SFNT bitmaps are now handled correctly. - - - II. IMPORTANT CHANGES - - - The new functions `FT_Get_CID_Is_Internally_CID_keyed' and - `FT_Get_CID_From_Glyph_Index' can be used to access CID-keyed - CFF fonts via CID values. This code has been contributed by - Michael Toftdal. - - - III. MISCELLANEOUS - - - `FT_Outline_Get_InsideBorder' returns FT_STROKER_BORDER_RIGHT - for empty outlines. This was incorrectly documented. - - - The `ftview' demo program now supports UTF-8 encoded strings. - - -====================================================================== - -CHANGES BETWEEN 2.3.8 and 2.3.7 - - I. IMPORTANT BUG FIXES - - - CID-keyed fonts in an SFNT wrapper were not handled correctly. - - - The smooth renderer produced truncated images (on the right) for - outline parts with negative horizontal values. Most fonts don't - contain outlines left to the y coordinate axis, but the effect - was very noticeable for outlines processed with FT_Glyph_Stroke, - using thick strokes. - - - `FT_Get_TrueType_Engine_Type' returned a wrong value if both - configuration macros TT_CONFIG_OPTION_BYTECODE_INTERPRETER and - TT_CONFIG_OPTION_UNPATENTED_HINTING were defined. - - - The `face_index' field in the `FT_Face' structure wasn't - initialized properly after calling FT_Open_Face and friends with - a positive face index for CFFs, WinFNTs, and, most importantly, - for TrueType Collections (TTCs). - - - II. IMPORTANT CHANGES - - - Rudimentary support for Type 1 fonts and CID-keyed Type 1 fonts - in an SFNT wrapper has been added -- such fonts are used on the - Mac. The core SFNT tables `TYP1' and `CID ' are passed to the - PS Type 1 and CID-keyed PS font drivers; other tables (`ALMX', - `BBOX', etc.) are not supported yet. - - - A new interface to extract advance values of glyphs without - loading their outlines has been added. The functions are called - `FT_Get_Advance' and `FT_Get_Advances'; they are defined in file - `ftadvanc.h' (to be accessed as FT_ADVANCES_H). - - - A new function `FT_Get_FSType_Flags' (in FT_FREETYPE_H) has been - contributed by David Bevan to access the embedding and - subsetting restriction information of fonts. - - - III. MISCELLANEOUS - - - FT_MulFix is now an inlined function; by default, assembler code - is provided for x86 and ARM. See FT_CONFIG_OPTION_INLINE_MULFIX - and FT_CONFIG_OPTION_NO_ASSEMBLER (in ftoption.h) for more. - - - The handling of `tricky' fonts (this is, fonts which don't work - with the autohinter, needing the font format's hinting engine) - has been generalized and changed slightly: - - . A new face flag FT_FACE_FLAG_TRICKY indicates that the font - format's hinting engine is necessary for correct rendering. - The macro FT_IS_TRICKY can be used to check this flag. - - . FT_LOAD_NO_HINTING is now ignored for tricky fonts. To really - force raw loading of such fonts (without hinting), both - FT_LOAD_NO_HINTING and FT_LOAD_NO_AUTOHINT must be used -- - this is something which you probably never want to do. - - . Tricky TrueType fonts always use the bytecode interpreter, - either the patented or unpatented version. - - - The function `FT_GlyphSlot_Own_Bitmap' has been moved from - FT_SYNTHESIS_H to FT_BITMAP_H; it is now part of the `official' - API. (The functions in FT_SYNTHESIS_H are still subject to - change, however.) - - - In the `ftdiff' demo program you can now toggle the use of - FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH with key `a'. - - -====================================================================== - -CHANGES BETWEEN 2.3.7 and 2.3.6 - - I. IMPORTANT BUG FIXES - - - If the library was compiled on an i386 platform using gcc, and - compiler option -O3 was given, `FT_MulFix' sometimes returned - incorrect results which could have caused problems with - `FT_Request_Metrics' and `FT_Select_Metrics', returning an - incorrect descender size. - - - Pure CFFs without subfonts were scaled incorrectly if the font - matrix was non-standard. This bug has been introduced in - version 2.3.6. - - - The `style_name' field in the `FT_FaceRec' structure often - contained a wrong value for Type 1 fonts. This misbehaviour - has been introduced in version 2.3.6 while trying to fix - another problem. [Note, however, that this value is - informative only since the used algorithm to extract it is - very simplistic.] - - - II. IMPORTANT CHANGES - - - Two new macros, FT_OUTLINE_SMART_DROPOUTS and - FT_OUTLINE_EXCLUDE_STUBS, have been introduced. Together with - FT_OUTLINE_IGNORE_DROPOUTS (which was ignored previously) it is - now possible to control the dropout mode of the `raster' module - (for B&W rasterization), using the `flags' field in the - `FT_Outline' structure. - - - The TrueType bytecode interpreter now passes the dropout mode to - the B&W rasterizer. This greatly increases the output for small - ppem values of many fonts like `pala.ttf'. - - -====================================================================== - -CHANGES BETWEEN 2.3.6 and 2.3.5 - - I. IMPORTANT BUG FIXES - - - A bunch of potential security problems have been found. All - users should update. - - - Microsoft Unicode cmaps in TrueType fonts are now always - preferred over Apple cmaps. This is not a bug per se, but there - exist some buggy fonts created for MS which have broken Apple - cmaps. This affects only the automatic selection of FreeType; - it's always possible to manually select an Apple Unicode cmap if - desired. - - - Many bug fixes to the TrueType bytecode interpreter. - - - Improved Mac support. - - - Subsetted CID-keyed CFFs are now supported correctly. - - - CID-keyed CFFs with subfonts which are scaled in a non-standard - way are now handled correctly. - - - A call to FT_Open_Face with `face_index' < 0 crashed FreeType if - the font was a Windows (bitmap) FNT/FON. - - - II. IMPORTANT CHANGES - - - The new function `FT_Get_CID_Registry_Ordering_Supplement' gives - access to those fields in a CID-keyed font. The code has been - contributed by Derek Clegg. - - - George Williams contributed code to validate the new `MATH' - OpenType table (within the `otvalid' module). The `ftvalid' - demo program has been extended accordingly. - - - An API for cmap 14 support (for Unicode Variant Selectors, UVS) - has been contributed by George Williams. - - - A new face flag FT_FACE_FLAG_CID_KEYED has been added, together - with a macro FT_IS_CID_KEYED which evaluates to 1 if the font is - CID-keyed. - - - III. MISCELLANEOUS - - - Build support for symbian has been contributed. - - - Better WGL4 glyph name support, contributed by Sergey Tolstov. - - - Debugging output of the various FT_TRACEX macros is now sent to - stderr. - - - The `ftview' demo program now provides artificial slanting too. - - - The `ftvalid' demo program has a new option `-f' to select the - font index. - - -====================================================================== - -CHANGES BETWEEN 2.3.5 and 2.3.4 - - I. IMPORTANT BUG FIXES - - - Some subglyphs in TrueType fonts were handled incorrectly due to - a missing graphics state reinitialization. - - - Large .Z files (as distributed with some X11 packages) weren't - handled correctly, making FreeType increase the heap stack in an - endless loop. - - - A large number of bugs have been fixed to avoid crashes and - endless loops with invalid fonts. - - - II. IMPORTANT CHANGES - - - The two new cache functions `FTC_ImageCache_LookupScaler' and - `FTC_SBit_Cache_LookupScaler' have been added to allow lookup of - glyphs using an `FTC_Scaler' object; this makes it possible to - use fractional pixel sizes in the cache. The demo programs have - been updated accordingly to use this feature. - - - A new API `FT_Get_CMap_Format' has been added to get the cmap - format of a TrueType font. This is useful in handling PDF - files. The code has been contributed by Derek Clegg. - - - The auto-hinter now produces better output by default for - non-Latin scripts like Indic. This was done by using the CJK - hinting module as the default instead of the Latin one. Thanks - to Rahul Bhalerao for this suggestion. - - - A new API `FT_Face_CheckTrueTypePatents' has been added to find - out whether a given TrueType font uses patented bytecode - instructions. The `ft2demos' bundle contains a new program - called `ftpatchk' which demonstrates its usage. - - - A new API `FT_Face_SetUnpatentedHinting' has been added to - enable or disable the unpatented hinter. - - - Support for Windows FON files in PE format has been contributed - by Dmitry Timoshkov. - - - III. MISCELLANEOUS - - - Vincent Richomme contributed Visual C++ project files for Pocket - PCs. - - -====================================================================== - -CHANGES BETWEEN 2.3.4 and 2.3.3 - - I. IMPORTANT BUG FIXES - - - A serious bug in the handling of bitmap fonts (and bitmap - strikes of outline fonts) has been introduced in 2.3.3. - - -====================================================================== - -CHANGES BETWEEN 2.3.3 and 2.3.2 - - I. IMPORTANT BUG FIXES - - - Remove a serious regression in the TrueType bytecode interpreter - that was introduced in version 2.3.2. Note that this does not - disable the improvements introduced to the interpreter in - version 2.3.2, only some ill cases that occurred with certain - fonts (though a few popular ones). - - - The auto-hinter now ignores single-point contours for computing - blue zones. This bug created `wavy' baselines when rendering - text with various fonts that use these contours to model - mark-attach points (these are points that are never rasterized - and are placed outside of the glyph's real outline). - - - The `rsb_delta' and `lsb_delta' glyph slot fields are now set to - zero for mono-spaced fonts. Otherwise code that uses them would - essentially ruin the fixed-advance property. - - - Fix CVE-2007-1351 which can cause an integer overflow while - parsing BDF fonts, leading to a potentially exploitable heap - overflow condition. - - - II. MISCELLANEOUS - - - Fixed compilation issues on some 64-bit platforms (see ChangeLog - for details). - - - A new demo program `ftdiff' has been added to compare TrueType - hinting, FreeType's auto hinting, and rendering without hinting - in three columns. - - -====================================================================== - -CHANGES BETWEEN 2.3.2 and 2.3.1 - - I. IMPORTANT BUG FIXES - - - FreeType returned incorrect kerning information from TrueType - fonts when the bytecode interpreter was enabled. This happened - due to a typo introduced in version 2.3.0. - - - Negative kerning values from PFM files are now reported - correctly (they were read as 16-bit unsigned values from the - file). - - - Fixed a small memory leak when `FT_Init_FreeType' failed for - some reason. - - - The Postscript hinter placed and sized very thin and ghost stems - incorrectly. - - - The TrueType bytecode interpreter has been fixed to get rid of - most of the rare differences seen in comparison to the Windows - font loader. - - - II. IMPORTANT CHANGES - - - The auto-hinter now better deals with serifs and corner cases - (e.g., glyph '9' in Arial at 9pt, 96dpi). It also improves - spacing adjustments and doesn't change widths for non-spacing - glyphs. - - - Many Mac-specific functions are deprecated (but still - available); modern replacements have been provided for them. - See the documentation in file `ftmac.h'. - - -====================================================================== - -CHANGES BETWEEN 2.3.1 and 2.3.0 - - I. IMPORTANT BUG FIXES - - - The TrueType interpreter sometimes returned incorrect horizontal - metrics due to a bug in the handling of the SHZ instruction. - - - A typo in a security check introduced after version 2.2.1 - prevented FreeType to render some glyphs in CFF fonts. - - -====================================================================== - -CHANGES BETWEEN 2.3.0 and 2.2.1 - - I. IMPORTANT BUG FIXES - - - The PCF font loader is now much more robust while loading - malformed font files. - - - Various memory leaks have been found and fixed. - - - The TrueType name loader now deals properly with some fonts that - encode their names in UTF-16 (the specification was vague, and - the code incorrectly assumed UCS-4). - - - Fixed the TrueType bytecode loader to deal properly with subtle - monochrome/gray issues when scaling the CVT. Some fonts - exhibited bad rendering artifacts otherwise. - - - `FT_GlyphSlot_Embolden' now supports vertical layouts correctly - (it mangled the vertical advance height). - - - Fixed byte endian issues of `ftmac.c' to support Mac OS X on - i386. - - - The PFR font loader no longer erroneously tags font files - without any outlines as FT_FACE_FLAG_SCALABLE. - - - II. NEW API FUNCTIONS - - - `FT_Library_SetLcdFilter' allows you to select a special filter - to be applied to the bitmaps generated by `FT_Render_Glyph' if - one of the FT_RENDER_MODE_LCD and FT_RENDER_MODE_LCD_V modes has - been selected. This filter is used to reduce color fringes; - several settings are available through the FT_LCD_FILTER_XXX - enumeration. - - Its declaration and documentation can be found in file - `include/freetype/ftlcdfil.h' (to be accessed with macro - FT_LCD_FILTER_H). - - *IMPORTANT*: This function returns an error - (FT_Err_Unimplemented_Feature) in default builds of the library - for patent reasons. See below. - - - `FT_Get_Gasp' allows you to query the flags of the TrueType - `gasp' table for a given character pixel size. This is useful - to duplicate the text rendering of MS Windows when the native - bytecode interpreter is enabled (which isn't the default for - other patent reasons). - - Its declaration and documentation can be found in file - `include/freetype/ftgasp.h' (to be accessed with macro - FT_GASP_H). - - - III. IMPORTANT CHANGES - - - The auto-hinter has been tuned a lot to improve its results with - serif fonts, resulting in much better font rendering of many web - pages. - - - The unpatented hinter is now part of the default build of the - library; we have added code to automatically support `tricky' - fonts that need it. - - This means that FreeType should `just work' with certain Asian - fonts, like MingLiU, which cannot properly be loaded without a - bytecode interpreter, but which fortunately do not use any of - the patented bytecode opcodes. We detect these fonts by name, - so please report any font file that doesn't seem to work with - FreeType, and we shall do what we can to support it in a next - release. - - Note that the API hasn't changed, so you can still force - unpatented hinting with a special parameter to `FT_Open_Face' as - well. This might be useful in same cases; for example, a PDF - reader might present a user option to activate it to deal with - certain `tricky' embedded fonts which cannot be clearly - identified. - - If you are a developer for embedded systems, you might want to - *disable* the feature to save code space by undefining - TT_CONFIG_OPTION_UNPATENTED_HINTING in file `ftoption.h'. - - - LCD-optimized rendering is now *disabled* in all default builds - of the library, mainly due to patent issues. For more - information see: - - https://lists.gnu.org/archive/html/freetype/2006-09/msg00064.html - - A new configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING - has been introduced in `ftoption.h'; manually define it in this - file if you want to re-enable the feature. - - The change only affects the implementation, not the FreeType - API. This means that clients don't need to be modified, because - the library still generates LCD decimated bitmaps, but with the - added constraint that R=G=B on each triplet. - - The displayed result should be equal to normal anti-aliased - rendering. - - Additionally, if FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not - defined, the new `FT_Library_SetLcdFilter' function returns the - FT_Err_Unimplemented_Feature error code. - - - Some computation bugs in the TrueType bytecode interpreter were - found, which allow us to get rid of very subtle and rare - differences we had experienced with the Windows renderer. - - - It is now possible to cross-compile the library easily. See the - file `docs/INSTALL.CROSS' for details. - - - The file `src/base/ftmac.c' now contains code for Mac OS X only; - its deprecated function `FT_GetFile_From_Mac_Font_Name' always - returns an error even if the QuickDraw framework is available. - The previous version has been moved to `builds/mac/ftmac.c'. - - Selecting configure option `--with-quickdraw-carbon' makes the - build process use the original `ftmac.c' file instead of the Mac - OS X-only version. - - - IV. MISCELLANEOUS - - - Various performance and memory footprint optimizations have been - performed on the TrueType and CFF font loaders, sometimes with - very drastic benefits (e.g., the TrueType loader is now about - 25% faster; FreeType should use less heap memory under nearly - all conditions). - - - The anti-aliased rasterizer has been optimized and is now 15% to - 25% percent faster than in previous versions, depending on - content. - - - The Type 1 loader has been improved; as an example, it now skips - top-level dictionaries properly. - - - Better support for Mac fonts on POSIX systems, plus compilation - fixes for Mac OS X on ppc64 where `ftmac.c' cannot be built. - - - Configuration without `--with-old-mac-fonts' does not include - `ftmac.c' (this was the behaviour in FreeType version 2.1.10). - - - The TrueTypeGX validator (gxvalid) checks the order of glyph IDs - in the kern table. - - -====================================================================== - -CHANGES BETWEEN 2.2.1 and 2.2 - - I. IMPORTANT BUG FIXES - - - Various integer overflows have been fixed. - - - PFB fonts with MacOS resource fork weren't handled correctly on - non-MacOS platforms. - - -====================================================================== - -CHANGES BETWEEN 2.2 and 2.1.10 - -(not released officially) - - I. IMPORTANT BUG FIXES - - - Vertical metrics for SFNT fonts were incorrect sometimes. - - - The FT_HAS_KERNING macro always returned 0. - - - CFF OpenType fonts didn't return correct vertical metrics for - glyphs with outlines. - - - If FreeType was compiled without hinters, all font formats based - on PS outlines weren't scaled correctly. - - - II. IMPORTANT CHANGES - - - Version 2.2 no longer exposes its internals, this is, the header - files located in the `include/freetype/internal' directory of - the source package are not copied anymore by the `make install' - command. Consequently, a number of rogue clients which directly - access FreeType's internal functions and structures won't - compile without modification. - - We provide patches for most of those rogue clients. See the - following page for more information: - - https://www.freetype.org/freetype2/patches/rogue-patches.html - - Note that, as a convenience to our Unix desktop users, version - 2.2 is *binary* compatible with FreeType 2.1.7, which means that - installing this release on an existing distribution shall not - break any working desktop. - - - FreeType's build mechanism has been redesigned. With GNU make - it is now sufficient in most cases to edit two files: - `modules.cfg', to select the library components, and the - configuration file `include/freetype/config/ftoption.h' (which - can be copied to the objects directory). Removing unused module - directories to prevent its compilation and editing - `include/freetype/config/ftmodule.h' is no longer necessary. - - - The LIGHT hinting algorithm produces more pleasant results. - Also, using the FT_LOAD_TARGET_LIGHT flags within FT_Load_Glyph - always forces auto-hinting, as a special exception. This allows - you to experiment with it even if you have enabled the TrueType - bytecode interpreter in your build. - - - The auto hinter now employs a new algorithm for CJK fonts, based - on Akito Hirai's patch. Note that this only works for fonts - with a Unicode charmap at the moment. - - - The following callback function types have changed slightly (by - adding the `const' keyword where appropriate): - - FT_Outline_MoveToFunc - FT_Outline_LineToFunc - FT_Outline_ConicToFunc - FT_Outline_CubicToFunc - FT_SpanFunc - FT_Raster_RenderFunc - - FT_Glyph_TransformFunc - FT_Renderer_RenderFunc - FT_Renderer_TransformFunc - - Note that this doesn't affect binary backward compatibility. - - - On MacOS, new APIs have been added as replacements for legacy - APIs: `FT_New_Face_From_FSRef' for `FT_New_Face_From_FSSpec', - and `FT_GetFile_From_Mac_ATS_Name' for - `FT_GetFile_From_Mac_Name'. Legacy APIs are still available, if - FreeType is built without disabling them. - - - A new API `FT_Select_Size' has been added to select a bitmap - strike by its index. Code using other functions to select - bitmap strikes should be updated to use this function. - - - A new API `FT_Get_SubGlyph_Info' has been added to retrieve - subglyph data. This can be used by rogue clients which used to - access the internal headers to get the corresponding data. - - - In 2.1.10, the behaviour of `FT_Set_Pixel_Sizes' was changed for - BDF/PCF fonts, and only for them. This causes inconsistency. - In this release, we undo the change. The intent of the change - in 2.1.10 is to allow size selection through real dimensions, - which can now be done through `FT_Request_Size'. - - - Some security issues were discovered and fixed in the CFF and - Type 1 loader, causing crashes of FreeType by malformed font - files. - - - III. MISCELLANEOUS - - - The documentation for FT_LOAD_TARGET_XXX and FT_RENDER_MODE_XXX - values now better reflects its usage and differences: One set is - used to specify the hinting algorithm, the other to specify the - pixel rendering mode. - - - `FT_New_Face' and `FT_New_Face_From_FSSpec' in ftmac.c have been - changed to count supported scalable faces (sfnt, LWFN) only, and - to return the number of available faces via face->num_faces. - Unsupported bitmap faces (fbit, NFNT) are ignored. - - - builds/unix/configure has been improved for MacOS X. It now - automatically checks available functions in Carbon library, and - prepare to use newest functions by default. Options to specify - the dependencies of each Carbon APIs (FSSpec, FSRef, old/new - QuickDraw, ATS) are available too. By manual disabling of all - QuickDraw functionality, FreeType can be built without - `deprecated function' warnings on MacOS 10.4.x, but - FT_GetFile_Mac_Name in ftmac.c then is changed to a dummy - function, and returns an `unimplemented' error. For details see - builds/mac/README. - - - SFNT cmap handling has been improved, mainly to run much faster - with CJK fonts. - - - A new function `FT_Get_TrueType_Engine_Type (declared in - `FT_MODULE_H') is provided to determine the status of the - TrueType bytecode interpreter compiled into the library - (patented, unpatented, unimplemented). - - - Vertical metrics of glyphs are synthesized if the font does not - provide such information. You can tell whether the metrics are - synthesized or not by checking the FT_FACE_FLAG_VERTICAL flag of - the face. - - - The demo programs `ftview' and `ftstring' have been rewritten - for better readability. `ftview' has a new switch `-p' to test - FT_New_Memory_Face (instead of FT_New_Face). - - - FreeType now honours bit 1 in the `head' table of TrueType fonts - (meaning `left sidebearing point at x=0'). This helps with some - buggy fonts. - - - Rudimentary support for Adobe's new `SING Glyphlet' format. See - - https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5148.SING_Tutorial.pdf - - for more information. - - - The `ftdump' program from the `ft2demos' bundle now shows some - information about charmaps. It also supports a new switch `-v' - to increase verbosity. - - - Better AFM support. This includes track kerning support. - - -====================================================================== - -CHANGES BETWEEN 2.1.10 and 2.1.9 - - I. IMPORTANT BUG FIXES - - - The size comparison for BDF and PCF files could fail sometimes. - - - Some CFF files were still not loaded correctly. Patch from - Derek Noonburg. - - - The stroker still had some serious bugs. - - - Boris Letocha fixed a bug in the TrueType interpreter: The - NPUSHW instruction wasn't skipped correctly in IF clauses. Some - fonts like `Helvetica 75 Bold' failed. - - - Another serious bug in handling TrueType hints caused many - distortions. It has been introduced in version 2.1.8, and it is - highly recommended to upgrade. - - - FreeType didn't properly parse empty Type 1 glyphs. - - - An unbound dynamic buffer growth was fixed in the PFR loader. - - - Several bugs have been fixed in the cache sub-system. - - - FreeType behaved incorrectly when resizing two distinct but very - close character pixel sizes through `FT_Set_Char_Size' (Savannah - bug #12263). - - - The auto-hinter didn't work properly for fonts without a Unicode - charmap -- it even refused to load the glyphs. - - - II. IMPORTANT CHANGES - - - Many fixes have been applied to drastically reduce the amount of - heap memory used by FreeType, especially when using - memory-mapped font files (which is the default on Unix systems - which support them). - - - The auto-hinter has been replaced with a new module, called the - `auto-fitter'. It consumes less memory than its predecessor, - and it is prepared to support non-latin scripts better in next - releases. - - - George Williams contributed code to read kerning data from PFM - files. - - - FreeType now uses the TT_NAME_ID_PREFERRED_FAMILY and - TT_NAME_ID_PREFERRED_SUBFAMILY strings (if available) for - setting family and style in SFNT fonts (patch from Kornfeld - Eliyahu Peter). - - - A new API `FT_Sfnt_Table_Info' (in FT_TRUETYPE_TABLES_H) has - been added to retrieve name and size information of SFNT tables. - - - A new API `FT_OpenType_Validate' (in FT_OPENTYPE_VALIDATE_H) has - been added to validate OpenType tables (BASE, GDEF, GPOS, GSUB, - JSTF). After validation it is no longer necessary to check - for errors in those tables while accessing them. - - Note that this module might be moved to another library in the - future to avoid a tight dependency between FreeType and the - OpenType specification. - - - A new API in FT_BITMAP_H (`FT_Bitmap_New', `FT_Bitmap_Convert', - `FT_Bitmap_Copy', `FT_Bitmap_Embolden', `FT_Bitmap_Done') has - been added. Its use is to convert an FT_Bitmap structure in - 1bpp, 2bpp, 4bpp, or 8bpp format into another 8bpp FT_Bitmap, - probably using a different pitch, and to further manipulate it. - - - A new API `FT_Outline_Embolden' (in FT_OUTLINE_H) gives finer - control how outlines are emboldened. - - - `FT_GlyphSlot_Embolden' (in FT_SYNTHESIS_H) now handles bitmaps - also (code contributed by Chia I Wu). Note that this function - is still experimental and may be replaced with a better API. - - - The method how BDF and PCF bitmap fonts are accessed has been - refined. Formerly, FT_Set_Pixel_Sizes and FT_Set_Char_Size - were synonyms in FreeType's BDF and PCF interface. This has - changed now. FT_Set_Pixel_Sizes should be used to select the - actual font dimensions (the `strike', which is the sum of the - `FONT_ASCENT' and `FONT_DESCENT' properties), while - FT_Set_Char_Size selects the `nominal' size (the `PIXELSIZE' - property). In both functions, the width parameter is ignored. - - - III. MISCELLANEOUS - - - The BDF driver no longer converts all returned bitmaps with a - depth of 2bpp or 4bpp to a depth of 8bpp. The documentation has - not mentioned this explicitly, but implementors might have - relied on this after looking into the source files. - - - A new option `--ftversion' has been added to freetype-config to - return the FreeType version. - - - The memory debugger has been updated to dump allocation - statistics on all allocation sources in the library. This is - useful to spot greedy allocations when loading and processing - fonts. - - - We removed a huge array of constant pointers to constant strings - in the `psnames' module. The problem was that compilations in - PIC mode (i.e., when generating a Unix shared object/dll) put - the array into the non-shared writable section of the library - since absolute pointers are not relocatable by nature. - - This reduces the memory consumption by approximately 16KByte per - process linked to FreeType. We now also store the array in a - compressed form (as a trie) which saves about 20KByte of code as - well. - - - Kirill Smelkov provided patches to make src/raster/ftraster.c - compile stand-alone again. - - -====================================================================== - -CHANGES BETWEEN 2.1.9 and 2.1.8 - - I. IMPORTANT BUG FIXES - - - The function `FT_Get_CharMap_Index' was only declared, without - any real code. For consistency, it has been renamed to - `FT_Get_Charmap_Index'. (This function is needed to implement - cmap caches.) - - - `FT_Outline_Get_BBox' sometimes returned incorrect values for - conic outlines (e.g., for TrueType fonts). - - - Handling of `bhed' table has been fixed. - - - The TrueType driver with enabled byte code interpreter sometimes - returned artifacts due to incorrect rounding. This bug has been - introduced after version 2.1.4. - - - The BDF driver dropped the last glyph in the font. - - - The BDF driver now uses the DEFAULT_CHAR property (if available) - to select a glyph shape for the undefined glyph. - - - The stroker failed for closed outlines and single points. - - - II. IMPORTANT CHANGES - - - George Williams contributed code to handle Apple's font - distortion technology found in GX fonts (`avar', `cvar', `fvar', - and `gvar' tables; the Multiple Masters API has been slightly - extended to cope with the new functionality). - - - The `FT_GlyphSlotRec' structure has been extended: The elements - `lsb_delta' and `rsb_delta' give the difference between hinted - and unhinted left and right side bearings if autohinting is - active. Using those values can improve the inter-letter spacing - considerably. See the documentation of `FT_GlyphSlotRec' and - the `ftstring' demo program how to use it. - - - Loading TrueType and Type 1 fonts has been made much faster. - - - The stroker is no longer experimental (but the cache subsystem - still is). - - - III. MISCELLANEOUS - - - A new documentation file `formats.txt' describes various font - formats supported (and not supported) by FreeType. - - -====================================================================== - -CHANGES BETWEEN 2.1.8 and 2.1.7 - - I. IMPORTANT BUG FIXES - - - The native TrueType hinter contained some bugs which prevented - some fonts to be rendered correctly, most notably Legendum.otf. - - - The PostScript hinter now produces improved results. - - - The linear advance width and height values were incorrectly - rounded, making them virtually unusable if not loaded with - FT_LOAD_LINEAR_DESIGN. - - - Indexing CID-keyed CFF fonts is now working: The glyph index is - correctly treated as a CID, similar to FreeType's CID driver - module. Note that CID CMap support is still missing. - - - The FT_FACE_FLAG_GLYPH_NAMES flag is now set correctly for all - font formats. - - - Some subsetted Type 1 fonts weren't parsed correctly. This bug - has been introduced in 2.1.7. In summary, the Type 1 parser has - become more robust. - - - Non-decimal numbers weren't parsed correctly in PS fonts. - - - The WinFNT driver now correctly reports FT_ENCODING_NONE for all - but one encoding. Use the new FT_WinFNT_ID_XXX values together - with `FT_Get_WinFNT_Header' to get the WinFNT charset ID. - - - The descender metrics (face->size->metrics.descender) for WinFNT - bitmap fonts had the wrong sign. - - - The (emulated) `seac' support for CFF fonts was broken. - - - The `flex' operator didn't work for CFF fonts. - - - PS glyphs which use the `hintmask' operator haven't been - rendered correctly in some cases. - - - Metrics for BDF and PCF bitmap font formats have been fixed. - - - Autohinting is now disabled for glyphs which are vertically - distorted or mirrored (using a transformation matrix). This - fixes a bug which produced zero-height glyphs. - - - The `freetype-config' script now handles --prefix and - --exec-prefix correctly; it also returns the proper --rpath (or - -R) value if FreeType has been built as a shared library. - - - II. IMPORTANT CHANGES - - - Both PCF and BDF drivers now handle the SETWIDTH_NAME and - ADD_STYLE_NAME properties. Values are appended to - face->style_name; example: `Bold SemiCondensed'. - - - The PCF driver now handles bitmap fonts compressed with the LZW - algorithm (extension .pcf.Z, compressed with `compress'). - - - A new API function `FT_Get_CMap_Language_ID' (declared in - `tttables.h') is available to get the language ID of a - TrueType/SFNT cmap. - - - The hexadecimal format of data after the `StartData' command in - CID-keyed Type 1 fonts is now supported. While this can't occur - in file-based fonts, it can happen in document-embedded - resources of PostScript documents. - - - Embedded bitmaps in SFNT-based CFF fonts are now supported. - - - A simple API is now available to control FreeType's tracing - mechanism if compiled with FT_DEBUG_LEVEL_TRACE. See the file - `ftdebug.h' for more details. - - - YAMATO Masatake contributed improved handling of MacOS resource - forks on non-MacOS platforms (for example, Linux can mount MacOS - file systems). - - - Support for MacOS has been improved; there is now a new function - `FT_New_Face_From_FSSpec' similar to `FT_New_Face' except that - it accepts an FSSpec instead of a path. - - - The cache sub-system has been rewritten. - - - There is now support for deinstallation of faces. - - - A new API function `FTC_Manager_RemoveFaceID' has been added - to delete all `idle' nodes that correspond to a given - FTC_FaceID. All `locked' nodes (i.e., those with a reference - count > 0), will be modified to prevent them from appearing in - further lookups (they will be cleaned normally when their - reference count reaches 0). - - - There is now support for point scaling (i.e., providing - character sizes in points + dpis, instead of pixels). - - - Three abstract cache classes are now available: - - FTC_GCache: Used to store one glyph item per cache node, - with the ability to group common attributes into - `families'. This replaces the old - FTC_GlyphCache class. - - FTC_ICache: Used to store one FT_Glyph per cache node. This - extends FTC_GCache. Family definition, family - comparison, and glyph loading are however left - to sub-classes. - - FTC_SCache: Used to store up to 16 small bitmaps per cache - node. This extends FTC_GCache. Family - definition, family comparison and glyph loading - are however left to sub-classes. - - - The file `src/cache/ftcbasic.c' implements: - - FTC_ImageCache: Extends FTC_ICache; implements family - definitions and glyph loading similar to the - old API. - - FTC_SBitCache: Extends FTC_SCache, implements family - definitions and glyph loading similar to the - old API - - Client applications should be able to extend FTC_GCache, - FTC_ICache, or FTC_SCache much more easily (i.e., less code to - write, and less callbacks). For example, one could envision - caches that are capable of storing transformed (obliqued), - stroked, emboldened, or colored glyph images. Use - `ftcbasic.c' as an example. - - - All public APIs are now in `include/freetype/ftcache.h', (to - be accessed as `FT_CACHE_H'). The contents of - `include/freetype/cache/' is only needed by applications that - wish to implement their own caches. - - - There were some major performance improvements through the use - of various programming tricks. Cache hits are up to 70% - faster than in the old code. - - - The FTC_CMapCache has been simplified. Charmaps can only be - accessed by index right now. There is also a new API named - `FT_Charmap_GetIndex' for this purpose. - - - The demo programs have been updated to the new code. The - previous versions will not work with the current one. - - - Using an invalid face index in FT_Open_Face and friends now - causes an error even if the font contains a single face only. - - - III. MISCELLANEOUS - - - Wolfgang Domröse contributed support files for building FreeType - on the Atari using the PureC compiler. Note that the Atari is a - 16bit platform. - - - Vitaliy Pasternak contributed project files for VS.NET 2003. - - -====================================================================== - -CHANGES BETWEEN 2.1.7 and 2.1.6 - - I. IMPORTANT BUG FIXES - - - Updated to newest libtool version, fixing build problems on - various platforms. - - - On Unix platforms, `make install' didn't copy the correct - `ftconfig.h' file. - - Note that version 2.1.7 contains the same library C source code as - version 2.1.6. - - -====================================================================== - -CHANGES BETWEEN 2.1.6 and 2.1.5 - - I. IMPORTANT BUG FIXES - - - The PFR font driver didn't load kerning tables correctly, and - the functions in FT_PFR_H didn't work at all. - - - Type 1 font files in binary format (PFB) with an end-of-file - indicator weren't accepted by the FreeType engine. - - - Fonts which contain /PaintType and /StrokeWidth no longer cause - a segfault. This bug has been introduced in version 2.1.5. - - - Fonts loaded with FT_LOAD_RENDER no longer cause strange - results. This bug has been introduced in version 2.1.5. - - - Some Windows (bitmap) FNT/FON files couldn't be handled - correctly. - - - II. IMPORTANT CHANGES - - - The internal module API has been heavily changed in favor of - massive simplifications within the font engine. This also means - that authors of third-party modules must adapt their code to the - new scheme. - - NOTE: THE NEW SCHEME IS NOT COMPLETED YET. PLEASE WAIT UNTIL A - FINAL ANNOUNCEMENT! - - - The PostScript parser has been enhanced to handle comments and - strings correctly. Additionally, more syntax forms are - recognized. - - - Added the optional unpatented hinting system for TrueType. It - allows typefaces which need hinting to produce correct glyph - forms (e.g., Chinese typefaces from Dynalab) to work acceptably - without infringing Apple patents. This system is compiled only - if TT_CONFIG_OPTION_COMPILE_UNPATENTED_HINTING is defined in - ftoption.h (activated by default). - - - III. MISCELLANEOUS - - - There is now a guard in the public header files to protect - against inclusion of freetype.h from FreeType 1. - - - Direct inclusion of freetype.h and other public header files no - longer works. You have to use the documented scheme - - #include - #include FT_FREETYPE_H - - to load freetype.h with a symbolic name. This protects against - renaming of public header files (which shouldn't happen but - actually has, avoiding two public header files with the same - name). - - -====================================================================== - -CHANGES BETWEEN 2.1.5 and 2.1.4 - - I. IMPORTANT BUG FIXES - - - Parsing the /CIDFontName field now removes the leading slash to - be in sync with other font drivers. - - - gzip support was buggy. Some fonts could not be read. - - - Fonts which have nested subglyphs more than one level deep no - longer cause a segfault. - - - Creation of synthetic cmaps for fonts in CFF format was broken - partially. - - - Numeric font dictionary entries for synthetic fonts are no - longer overwritten. - - - The font matrix wasn't applied to the advance width for Type1, - CID, and CFF fonts. This caused problems when loading certain - synthetic Type 1 fonts like `Helvetica Narrow'. - - - The test for the charset registry in BDF and PCF fonts is now - case-insensitive. - - - FT_Vector_Rotate sometimes returned strange values due to - rounding errors. - - - The PCF driver now returns the correct number of glyphs - (including an artificial `notdef' glyph at index 0). - - - FreeType now supports buggy CMaps which are contained in many - CJK fonts from Dynalab. - - - Opening an invalid font on a Mac caused a segfault due to - double-freeing memory. - - - BDF fonts with more than 32768 glyphs weren't supported - properly. - - - II. IMPORTANT CHANGES - - - Accessing bitmap font formats has been synchronized. To do that - the FT_Bitmap_Size structure has been extended to contain new - fields `size', `x_ppem', and `y_ppem'. - - - The FNT driver now returns multiple faces, not multiple strikes. - - - The `psnames' module has been updated to the Adobe Glyph List - version 2.0. - - - The `psnames' module now understands `uXXXX[X[X]]' glyph names. - - - The algorithm for guessing the font style has been improved. - - - For fonts in SFNT format, root->height is no longer increased if - the line gap is zero. There exist fonts (containing e.g. form - drawing characters) which intentionally have a zero line gap - value. - - - ft_glyph_bbox_xxx flags are now deprecated in favour of - FT_GLYPH_BBOX_XXX. - - - ft_module_xxx flags are now deprecated in favour of - FT_MODULE_XXX. - - - FT_ENCODING_MS_{SJIS,GB2312,BIG5,WANSUNG,JOHAB} are now - deprecated in favour of - FT_ENCODING_{SJIS,GB2312,BIG5,WANSUNG,JOHAB} -- those encodings - are not specific to Microsoft. - - - III. MISCELLANEOUS - - - The autohinter has been further improved; for example, `m' - glyphs now retain its vertical symmetry. - - - Partial support of Mac fonts on non-Mac platforms. - - - `make refdoc' (after first `make') builds the HTML - documentation. You need Python for this. - - - The make build system should now work more reliably on DOS-like - platforms. - - - Support for EMX gcc and Watson C/C++ compilers on MS-DOS has - been added. - - - Better VMS build support. - - - Support for the pkg-config package by providing a `freetype.pc' - file. - - - New configure option --with-old-mac-fonts for Darwin. - - - Some source files have been renamed (mainly to fit into the 8.3 - naming scheme). - - -====================================================================== - -CHANGES BETWEEN 2.1.4 and 2.1.3 - - I. IMPORTANT BUG FIXES - - - Updated to newest libtool version, fixing build problems on - various platforms. - - - A fix in the Gzip stream reader: It couldn't read certain .gz - files properly due to a small typo. In certain cases, FreeType - could also loop endlessly when trying to load tiny gzipped - files. - - - The configure script now tries to use the system-wide zlib when - it finds one (instead of the copy found in src/gzip). And - `freetype-config' has been updated to return relevant flags in - this case when invoked with `--libs' (e.g. `-lzlib'). - - - Certain fonts couldn't be loaded by 2.1.3 because they lacked a - Unicode charmap (e.g. SYMBOL.TTF). FreeType erroneously - rejected them. - - - The CFF loader was modified to accept fonts which only contain a - subset of their reference charset. This prevented the correct - use of PDF-embedded fonts. - - - The logic to detect Unicode charmaps has been modified. This is - required to support fonts which include both 16-bit and 32-bit - charmaps (like very recent asian ones) using the new 10 and 12 - SFNT formats. - - - The TrueType loader now limits the depth of composite glyphs. - This is necessary to prevent broken fonts to break the engine by - blowing the stack with recursive glyph definitions. - - - The CMap cache is now capable of managing UCS-4 character codes - that are mapped through extended charmaps in recent - TrueType/OpenType fonts. - - - The cache sub-system now properly manages out-of-memory - conditions instead of blindly reporting them to the caller. - This means that it will try to empty the cache before restarting - its allocations to see if that can help. - - - The PFR driver didn't return the list of available embedded - bitmaps properly. - - - There was a nasty memory leak when using embedded bitmaps in - certain font formats. - - - II. IMPORTANT CHANGES - - - David Chester contributed some enhancements to the auto-hinter - that significantly increase the quality of its output. The - Postscript hinter was also improved in several ways. - - - The FT_RENDER_MODE_LIGHT render mode was implemented. - - - A new API function called `FT_Get_BDF_Property' has been added - to FT_BDF_H to retrieve BDF properties from BDF _and_ PCF font - files. THIS IS STILL EXPERIMENTAL, since it hasn't been - properly tested yet. - - - A Windows FNT specific API has been added, mostly to access font - headers. This is used by Wine. - - - TrueType tables without an `hmtx' table are now tolerated when - an incremental interface is used. This happens for certain - Type42 fonts passed from Ghostscript to FreeType. - - - The PFR font driver is now capable of returning the font family - and style names when they are available (instead of the sole - `FontID'). This is performed by parsing an *undocumented* - portion of the font file! - - - III. MISCELLANEOUS - - - The path stroker in FT_STROKER_H has entered beta stage. It now - works very well, but its interface might change a bit in the - future. More on this in later releases. - - - The documentation for FT_Size_Metrics didn't appear properly in - the API reference. - - - The file docs/VERSION.DLL has been updated to explain versioning - with FreeType (i.e., comparing release/libtool/so numbers, and - how to use them in autoconf scripts). - - - The installation documentation has been seriously revamped. - Everything is now in the `docs' directory. - - -====================================================================== - -CHANGES BETWEEN 2.1.3 and 2.1.2 - - I. IMPORTANT BUG FIXES - - - FT_Vector_Transform had been incorrectly modified in 2.1.2, - resulting in incorrect transformations being applied (for - example, rotations were processed in opposite angles). - - - The format 8 and 12 TrueType charmap enumeration routines have - been fixed (FT_Get_Next_Char returned invalid values). - - - The PFR font driver returned incorrect advance widths if the - outline and metrics resolution defined in the font file were - different. - - - FT_Glyph_To_Bitmap now returns successfully when called with an - FT_BitmapGlyph argument (it previously returned an error). - - - A bug in the Type 1 loader that prevented valid font bounding - boxes to be loaded from multiple master fonts. - - - The SFNT validation code has been rewritten. FreeType can now - load `broken' fonts that were usable on Windows, but not with - previous versions of the library. - - - The computation of bearings in the BDF driver has been fixed. - - - The Postscript hinter crashed when trying to hint certain glyphs - (more precisely, when trying to apply hints to an empty glyph - outline). - - - The TrueType glyph loader now supports composites in `Apple - format' (they differ slightly from Microsoft/OpenType ones in - the way transformation offsets are computed). - - - FreeType was very slow at opening certain asian CID/CFF fonts, - due to fixed increment in dynamic array re-allocations. This - has been changed to exponential behaviour to get acceptable - performance. - - - - II. IMPORTANT CHANGES - - - The PCF driver now supports gzip-compressed font files natively. - This means that you will be able to use all these bitmap fonts - that come with XFree86 with FreeType (and libXft/libXft2, by - extension). - - - The automatic and postscript hinters have both been updated. - This results in a relatively important increase of rendering - quality since many nasty defaults have been suppressed. Please - visit the web page: - - https://www.freetype.org/hinting/smooth-hinting.html - - for additional details on this topic. - - - The `load_flags' parameter of `FT_Load_Glyph' is now an FT_Int32 - (instead of just being an FT_Int). This breaks source and - binary compatibility for 16bit systems only, while retaining - both of them for 32 and 64 bit ones. - - Some new flags have been added consequently: - - FT_LOAD_NO_AUTOHINT :: Disable the use of the auto-hinter - (but not native format hinters). - - FT_LOAD_TARGET_NORMAL :: Hint and render for normal - anti-aliased displays. - - FT_LOAD_TARGET_MONO :: Hint and render for 1-bit displays. - - FT_LOAD_TARGET_LCD :: Hint and render for horizontal RGB or - BGR subpixel displays (like LCD - screens). THIS IS STILL - EXPERIMENTAL! - - FT_LOAD_TARGET_LCD_V :: Same as FT_LOAD_TARGET_LCD, for - vertical subpixel displays (like - rotated LCD screens). THIS IS STILL - EXPERIMENTAL! - - FT_LOAD_MONOCHROME is still supported, but only affects - rendering, not the hinting. - - Note that the `ftview' demo program available in the `ft2demos' - package has been updated to support LCD-optimized display on - non-paletted displays (under Win32 and X11). - - - The PFR driver now supports embedded bitmaps (all formats - supported), and returns correct kerning metrics for all glyphs. - - - The TrueType charmap loader now supports certain `broken' fonts - that load under Windows without problems. - - - The cache API has been slightly modified (it's still a beta!): - - - The type FTC_ImageDesc has been removed; it is now replaced - by FTC_ImageTypeRec. Note that one of its fields is a - `load_flag' parameter for FT_Load_Glyph. - - - The field `num_grays' of FT_SBitRec has been changed to - `max_grays' in order to fit within a single byte. Its - maximum value is thus 255 (instead of 256 as previously). - - - III. MISCELLANEOUS - - - Added support for the DESTDIR variable during `make install'. - This simplifies packaging of FreeType. - - - Included modified copies of the ZLib sources in `src/gzip' in - order to support gzip-compressed PCF fonts. We do not use the - system-provided zlib for now, though this is a probable - enhancement for future releases. - - - The DocMaker tool used to generate the on-line API reference has - been completely rewritten. It is now located in - `src/tools/docmaker/docmaker.py'. Features: - - - better cross-referenced output - - more polished output - - uses Python regular expressions (though it didn't speed the - program) - - much more modular structure, which allows for different - `backends' in order to generate HTML, XML, or whatever - format. - - One can regenerate the API reference by calling: - - python src/tools/docmaker/docmaker.py \ - --prefix=ft2 \ - --title=FreeType-2.1.3 \ - --output= - include/freetype/*.h \ - include/freetype/config/*.h \ - include/freetype/cache/*.h - - - A new, experimental, support for incremental font loading (i.e., - loading of fonts where the glyphs are not in the font file - itself, but provided by an external component, like a Postscript - interpreter) has been added by Graham Asher. This is still work - in progress, however. - - - A new, EXPERIMENTAL, path stroker has been added. It doesn't - suffer from severe rounding errors and treat bezier arcs - directly. Still work in progress (i.e. not part of the official - API). See the file for some of the - details. - - - The massive re-formatting of sources and internal re-design is - still under-way. Many internal functions, constants, and types - have been renamed. - - -====================================================================== - -CHANGES BETWEEN 2.1.2 and 2.1.1 - - I. IMPORTANT BUG FIXES - - - Many font drivers didn't select a Unicode charmap by default - when a new face was opened (with the FT_CONFIG_OPTION_USE_CMAPS - options enabled), causing many applications to not be able to - display text correctly with the 2.1.x releases. - - - The PFR driver had a bug in its composite loading code that - produces incorrectly placed accents with many fonts. - - - The Type42 driver crashed sometimes due to a nasty bug. - - - The Type 1 custom encoding charmap didn't handle the case where - the first glyph index wasn't 0. - - - A serious typo in the TrueType composite loader produced - incorrectly placed glyphs in fonts like `Wingdings' and a few - others. - - - II. MISCELLANEOUS - - - The Win32 Visual C++ project file has been updated to include - the PFR driver as well. - - - `freetype.m4' is now installed by default by `make install' on - Unix systems. - - - The function FT_Get_PS_Font_Info now works with CID and Type42 - fonts as well. - - -====================================================================== - -CHANGES BETWEEN 2.1.1 and 2.1.0 - - I. IMPORTANT BUG FIXES - - - The `version_info' returned by `freetype-config' in 2.1.0 - returned an invalid value. It now returns 9:1:3 (2.0.9 returned - 9:0:3). - - - Version 2.1.0 couldn't be linked against applications on Win32 - and Amiga systems due to a new debug function that wasn't - properly propagated to the system-specific directory in - `builds'. - - - Various MacOS and Mac OS X specific fixes. - - - Fixed a bug in the TrueType charmap validation routines that - made version 2.1.0 too restrictive -- many popular fonts have - been rejected. - - - There was still a very small difference between the monochrome - glyph bitmaps produced by FreeType 1.x and FreeType 2.x with the - bytecode interpreter enabled. This was caused by an invalid - flag setting in the TrueType glyph loader, making the rasterizer - change its drop-out control mode. Now the results should - _really_ be completely identical. - - - The TrueType name table loader has been improved to support many - popular though buggy Asian fonts. It now ignores empty name - entries, invalid pointer offsets and a few other incorrect - subtleties. Moreover, name strings are now loaded on demand, - which reduces the memory load of many faces (e.g. the ARIAL.TTF - font file contains a 10kByte name table with 70 names). - - - Fixed a bug in the Postscript hinter that prevented family blues - substitution to happen correctly. - - - II. NEW FEATURES - - - Three new font drivers in this release: - - * A BDF font driver, contributed by Franco Zappa Nardelli, - heavily modified by Werner Lemberg. It also supports - anti-aliased bitmaps (using a slightly extended BDF format). - - * A Type42 font driver, contributed by Roberto Alameda. It is - still experimental but seems to work relatively well. - - * A PFR font driver, contributed by David Turner himself. It - doesn't support PFR hinting -- note that BitStream has at - least two patents on this format! - - - III. MISCELLANEOUS - - - The cache sub-system has been optimized in important ways. - Cache hits are now significantly faster. For example, using the - CMap cache is about twice faster than calling FT_Get_Char_Index - on most platforms. Similarly, using an SBit cache is about five - times faster than loading the bitmaps from a bitmap file, and - 300 to 500 times faster than generating them from a scalable - format. - - Note that you should recompile your sources if you designed a - custom cache class for the FT2 Cache subsystem, since the - changes performed are source, but not binary, compatible. - - -====================================================================== - -CHANGES BETWEEN 2.1.0 and 2.0.9 - - I. IMPORTANT BUG FIXES - - - The TrueType bytecode interpreter has been fixed to produce - _exactly_ the same output as FreeType 1.x. Previous differences - were due to slightly distinct fixed-point computation routines - used to perform dot products and vector length measurements. - - It seems that native TrueType hinting is _extremely_ sensitive - to rounding errors. The required vector computation routines - have been optimized and placed within the `ttinterp.c' file. - - - Fixed the parsing of accelerator tables in the PCF font driver. - - - Fixed the Type1 glyph loader routine used to compute the font's - maximum advance width. - - - II. NEW FEATURES - - - The `configure' script used on Unix systems has been modified to - check that GNU Make is being used to build the library. - Otherwise, it will display a message proposing to use the - GNUMAKE environment variable to name it. - - The Unix-specific file README.UNX has been modified accordingly. - - - III. MISCELLANEOUS - - - The FreeType License in `docs/FTL.TXT' has been updated to - include a proposed preferred disclaimer. If you are using - FreeType in your products, you are encouraged (but not mandated) - to use the following text in your documentation: - - """ - Portions of this software are copyright © 1996-2002 The - FreeType Project (www.freetype.org). All rights reserved. - """ - - - The default size of the render pool has been reduced to 16kByte. - This shouldn't result in any noticeable performance penalty, - unless you are using the engine as-is to render very large and - complex glyphs. - - - The FreeType 2 redesign has begun. More information can be - found at this URL: - - https://www.freetype.org/freetype2/redesign.html - - The following internal changes have been performed within the - sources of this release: - - - Many internal types have been renamed to increase - consistency. The following should be true, except for - public types: - - * All structure types have a name ending in `Rec' (short - for `record'). - - * A pointer-to-structure type has the same name as the - structure, _without_ the `Rec' suffix. - - Example: - - typedef struct FooRec_ - { - ... - - } FooRec, *Foo; - - - Many internal macros have been renamed to increase - consistency. The following should be true: - - * All macros have a name beginning with `FT_'. This - required a few changes like - - ALLOC => FT_ALLOC - FREE => FT_FREE - REALLOC => FT_REALLOC - - * All macros are completely UPPERCASE. This required a - few changes like: - - READ_Short => FT_READ_SHORT - NEXT_Short => FT_NEXT_SHORT - GET_ULongLE => FT_GET_ULONG_LE - MEM_Set => FT_MEM_SET - MEM_Copy => FT_MEM_COPY - etc. - - * Whenever possible, all macro names follow the - FT__ pattern. For example - - ACCESS_Frame => FT_FRAME_ENTER - FORGET_Frame => FT_FRAME_EXIT - EXTRACT_Frame => FT_FRAME_EXTRACT - RELEASE_Frame => FT_FRAME_RELEASE - - FILE_Pos => FT_STREAM_POS - FILE_Seek => FT_STREAM_SEEK - FILE_Read => FT_STREAM_READ - FILE_ReadAt => FT_STREAM_READ_AT - READ_Fields => FT_STREAM_READ_FIELDS - - - Many internal functions have been renamed to follow the - FT__ pattern. For example: - - FT_Seek_Stream => FT_Stream_Seek - FT_Read_Stream_At => FT_Stream_ReadAt - FT_Done_Stream => FT_Stream_Close - FT_New_Stream => FT_Stream_Open - FT_New_Memory_Stream => FT_Stream_OpenMemory - FT_Extract_Frame => FT_Stream_ExtractFrame - - Note that method names do not contain `_'. - - - The FT_ALLOC_ARRAY and FT_REALLOC_ARRAY have been replaced - with FT_NEW_ARRAY and FT_RENEW_ARRAY which do not take a - type as the fourth argument. Instead, the array element - type size is computed automatically from the type of the - target pointer used. - - - A new object class, FT_CMap, has been introduced. These - internal objects are used to model character maps. This - eases the support of additional charmap types within the - engine. - - - A new configuration file named `ftstdlib.h' has been added - to `include/freetype/config'. It is used to define aliases - for _every_ routine of the ISO C library that the font - engine uses. Each aliases has a `ft_' prefix - (e.g. `ft_strlen' is an alias for `strlen'). - - This is used to ease the porting of FreeType 2 to exotic - runtime environments where the ISO C Library isn't available - (e.g. XFree86 extension modules). - - More details are available in the `ChangeLog' file. - - -====================================================================== - -CHANGES BETWEEN 2.0.9 and 2.0.8 - - I. IMPORTANT BUG FIXES - - - Certain fonts like `foxjump.ttf' contain broken name tables with - invalid entries and wild offsets. This caused FreeType to crash - when trying to load them. - - The SFNT `name' table loader has been fixed to be able to - support these strange fonts. - - Moreover, the code in charge of processing this table has been - changed to always favour Windows-formatted entries over other - ones. Hence, a font that works on Windows but not on the Mac - will load cleanly in FreeType and report accurate values for - Family & PostScript names. - - - The CID font driver has been fixed. It unfortunately returned a - Postscript Font name with a leading slash, as in - `/MunhwaGothic-Regular'. - - - FreeType 2 should now compile fine on AIX 4.3.3 as a shared - library. - - - A bug in the Postscript hinter has been found and fixed, - removing un-even stem widths at small pixel sizes (like 14-17). - - This improves the quality of a certain number of Postscript - fonts. - - - II. NEW FEATURES - - - A new function named `FT_Library_Version' has been added to - return the current library's major, minor, and patch version - numbers. This is important since the macros FREETYPE_MAJOR, - FREETYPE_MINOR, and FREETYPE_PATCH cannot be used when the - library is dynamically linked by a program. - - - Two new APIs have been added: `FT_Get_First_Char' and - `FT_Get_Next_Char'. - - Together, these can be used to iterate efficiently over the - currently selected charmap of a given face. Read the API - reference for more details. - - - III. MISCELLANEOUS - - - The FreeType sources are under heavy internal re-factoring. As - a consequence, we have created a branch named `STABLE' on the - CVS to hold all future releases/fixes in the 2.0.x family. - - The HEAD branch now contains the re-factored sources and - shouldn't be used for testing or packaging new releases. In - case you would like to access the 2.0.9 sources from our CVS - repository, use the tag `VER-2-0-9'. - - -====================================================================== - -CHANGES BETWEEN 2.0.8 and 2.0.7 - - I. IMPORTANT BUG FIXES - - - There was a small but nasty bug in `freetype-config.in' which - caused the `freetype-config' script to fail on Unix. - - This didn't prevent the installation of the library or even its - execution, but caused problems when trying to compile many Unix - packages that depend on it. - - - Some TrueType or OpenType fonts embedded in PDF documents do not - have a 'cmap', 'post' and 'name' as is required by the - specification. FreeType no longer refuses to load such fonts. - - - Various fixes to the PCF font driver. - - -====================================================================== - -CHANGES BETWEEN 2.0.7 and 2.0.6 - - I. IMPORTANT BUG FIXES - - - Fixed two bugs in the Type 1 font driver. The first one - resulted in a memory leak in subtle cases. The other one caused - FreeType to crash when trying to load `.gsf' files (Ghostscript - so-called Postscript fonts). - - (This made _many_ KDE applications crash on certain systems. - FreeType _is_ becoming a critical system component on Linux :-) - - - Fixed a memory leak in the CFF font driver. - - - Fixed a memory leak in the PCF font driver. - - - Fixed the Visual C++ project file - `builds/win32/visualc/freetype.dsp' since it didn't include the - Postscript hinter component, causing errors at build time. - - - Fixed a small rendering bug in the anti-aliased renderer that - only occurred when trying to draw thin (less than 1 pixel) - strokes. - - - Fixed `builds/unix/freetype2.a4' which is used to generate a - valid `freetype2.m4' for use with autoconf. - - - Fixed the OpenVMS Makefiles. - - - II. MISCELLANEOUS - - - Added `configure' and `install' scripts to the top-level - directory. A GNU-style installation is thus now easily possible - with - - ./configure - make - make install - - -====================================================================== - -CHANGES BETWEEN 2.0.6 and 2.0.5 - - I. IMPORTANT BUG FIXES - - - It wasn't possible to load embedded bitmaps when the auto-hinter - was used. This is now fixed. - - - The TrueType font driver didn't load some composites properly - (the sub-glyphs were slightly shifted, and this was only - noticeable when using monochrome rendering). - - - Various fixes to the auto-hinter. They merely improve the - output of sans-serif fonts. Note that there are still problems - with serifed fonts and composites (accented characters). - - - All scalable font drivers erroneously returned un-fitted glyph - advances when hinting was requested. This created problems for - a number of layout applications. This is a very old bug that - got undetected mainly because most test/demo program perform - rounding explicitly or implicitly (through the cache). - - - `FT_Glyph_To_Bitmap' did erroneously modify the source glyph in - certain cases. - - - `glnames.py' still contained a bug that made FreeType return - invalid names for certain glyphs. - - - The library crashed when loading certain Type 1 fonts like - `sadn.pfb' (`Stalingrad Normal'), which appear to contain - pathetic font info dictionaries. - - - The TrueType glyph loader is now much more paranoid and checks - everything when loading a given glyph image. This was necessary - to avoid problems (crashes and/or memory overwrites) with broken - fonts that came from a really buggy automatic font converter. - - - II. IMPORTANT UPDATES AND NEW FEATURES - - - Important updates to the Mac-specific parts of the library. - - - The caching sub-system has been completely re-designed, and its - API has evolved (the old one is still supported for backward - compatibility). - - The documentation for it is not yet completed, sorry. For now, - you are encouraged to continue using the old API. However, the - ftview demo program in the ft2demos package has already been - updated to use the new caching functions. - - - A new charmap cache is provided too. See `FTC_CMapCache'. This - is useful to perform character code -> glyph index translations - quickly, without the need for an opened FT_Face. - - - A NEW POSTSCRIPT HINTER module has been added to support native - hints in the following formats: PostScript Type 1, PostScript - CID, and CFF/CEF. - - Please test! Note that the auto-hinter produces better results - for a number of badly-hinted fonts (mostly auto-generated ones) - though. - - - A memory debugger is now part of the standard FreeType sources. - To enable it, define FT_DEBUG_MEMORY in - , and recompile the library. - - Additionally, define the _environment_ variable FT_DEBUG_MEMORY - and run any program using FreeType. When the library is exited, - a summary of memory footprints and possible leaks will be - displayed. - - This works transparently with _any_ program that uses FreeType. - However, you will need a lot of memory to use this (allocated - blocks are never released to the heap to detect double deletes - easily). - - - III. MISCELLANEOUS - - - We are aware of subtle differences between the output of - FreeType versions 1 and 2 when it comes to monochrome - TrueType-hinted glyphs. These are most probably due to small - differences in the monochrome rasterizers and will be worked out - in an upcoming release. - - - We have decided to fork the sources in a `stable' branch, and an - `unstable' one, since FreeType is becoming a critical component - of many Unix systems. - - The next bug-fix releases of the library will be named 2.0.7, - 2.0.8, etc., while the `2.1' branch will contain a version of - the sources where we will start major reworking of the library's - internals, in order to produce FreeType 2.2.0 (or even 3.0) in a - more distant future. - - We also hope that this scheme will allow much more frequent - releases than in the past. - - -====================================================================== - -CHANGES BETWEEN 2.0.5 and 2.0.4 - - NOTE THAT 2.0.5 DOES NOT CONTAIN THE POSTSCRIPT HINTER. THIS MODULE - WILL BE PART OF THE NEXT RELEASE (EITHER 2.0.6 or 2.1) - - - Fixed a bug that made certain glyphs, like `Cacute', `cacute' and - `lslash' unavailable from Unicode charmaps of Postscript fonts. - This prevented the correct display of Polish text, for example. - - - The kerning table of Type 1 fonts was loaded by FreeType, when its - AFM file was attached to its face, but the - FT_FACE_FLAG_HAS_KERNING bit flags was not set correctly, - preventing FT_Get_Kerning to return meaningful values. - - - Improved SFNT (TrueType & OpenType) charmap support. Slightly - better performance, as well as support for the new formats defined - by the OpenType 1.3 specification (8, 10, and 12) - - - Fixed a serious typo in `src/base/ftcalc.c' which caused invalid - computations in certain rare cases, producing ugly artefacts. - - - The size of the EM square is computed with a more accurate - algorithm for Postscript fonts. The old one caused slight errors - with embedded fonts found in PDF documents. - - - Fixed a bug in the cache manager that prevented normal LRU - behaviour within the cache manager, causing unnecessary reloads - (for FT_Face and FT_Size objects only). - - - Added a new function named `FT_Get_Name_Index' to retrieve the - glyph index of a given glyph name, when found in a face. - - - Added a new function named `FT_Get_Postscript_Name' to retrieve - the `unique' Postscript font name of a given face. - - - Added a new public header size named FT_SIZES_H (or - ) providing new FT_Size-management functions: - FT_New_Size, FT_Activate_Size, FT_Done_Size. - - - Fixed a reallocation bug that generated a dangling pointer (and - possibly memory leaks) with Postscript fonts (in - src/psaux/psobjs.c). - - - Many fixes for 16-bit correctness. - - - Removed many pedantic compiler warnings from the sources. - - - Added an Amiga build directory in `builds/amiga'. - - -====================================================================== - -CHANGES BETWEEN 2.0.4 and 2.0.3 - - - Fixed a rather annoying bug that was introduced in 2.0.3. Namely, - the font transformation set through FT_Set_Transform was applied - twice to auto-hinted glyphs, resulting in incorrectly rotated text - output. - - - Fixed _many_ compiler warnings. FT2 should now compile cleanly - with Visual C++'s most pedantic warning level (/W4). It already - compiled fine with GCC and a few other compilers. - - - Fixed a bug that prevented the linear advance width of composite - TrueType glyphs to be correctly returned. - - - Fixed the Visual C++ project files located in - `builds/win32/visualc' (previous versions used older names of the - library). - - - Many 32-bit constants have an `L' appended to their value, in - order to improve the 16-bitness of the code. Someone is actually - trying to use FT2 on an Atari ST machine! - - - Updated the `builds/detect.mk' file in order to automatically - build FT2 on AIX systems. AIX uses `/usr/sbin/init' instead of - `/sbin/init' and wasn't previously detected as a Unix platform by - the FreeType build system. - - - Updated the Unix-specific portions of the build system (new - libtool version, etc.). - - - The SFNT kerning loader now ensures that the table is sorted - (since some problem fonts do not meet this requirement). - - -======================================================================= - -CHANGES BETWEEN 2.0.3 and 2.0.2 - - I. CHANGES TO THE MODULES / FONT DRIVERS - - - THE AUTO-HINTER HAS BEEN SLIGHTLY IMPROVED, in order to fix - several annoying artefacts, mainly: - - - Blue zone alignment of horizontal stems wasn't performed - correctly, resulting in artefacts like the `d' being placed - one pixel below the `b' in some fonts like Time New Roman. - - - Overshoot thresholding wasn't performed correctly, creating - unpleasant artefacts at large character pixel sizes. - - - Composite glyph loading has been simplified. This gets rid - of various artefacts where the components of a composite - glyphs were not correctly spaced. - - These are the last changes to the current auto-hinting module. - A new hinting sub-system is currently in the work in order to - support native hints in Type 1 / CFF / OpenType fonts, as well - as globally improve rendering. - - - The PCF driver has been fixed. It reported invalid glyph - dimensions for the fonts available on Solaris. - - - The Type 1, CID and CFF drivers have been modified to fix the - computation of the EM size. - - - The Type 1 driver has been fixed to avoid a dangerous bug that - crashed the library with non-conforming fonts (i.e. ones that do - not place the .notdef glyph at position 0). - - - The TrueType driver had a rather subtle bug (dangling pointer - when loading composite glyphs) that could crash the library in - rare occasions! - - - II. HIGH-LEVEL API CHANGES - - - The error code enumeration values have been changed. An error - value is decomposed in a generic error code, and a module - number. see for details. - - - A new public header file has been introduced, named - FT_TRIGONOMETRY_H (include/freetype/fttrigon.h), providing - trigonometric functions to compute sines, cosines, arctangents, - etc. with 16.16 fixed precision. The implementation is based on - the CORDIC algorithm and is very fast while being sufficiently - accurate. - - - III. INTERNALS - - - Added BeOS-specific files in the old build sub-system. Note - that no changes were required to compile the library with Jam. - - - The configuration is now capable of automatically detecting - 64-bit integers on a set of predefined compilers (GCC, Visual - C++, Borland C++) and will use them by default. This provides a - small performance boost. - - - A small memory leak that happened when opening 0-sized files - (duh!) have been fixed. - - - Fixed bezier stack depth bug in the routines provided by the - FT_BBOX_H header file. Also fixed similar bugs in the - rasterizers. - - - The outline bounding box code has been rewritten to use direct - computations, instead of bezier sub-division, to compute the - exact bounding box of glyphs. This is slightly slower but more - accurate. - - - The build system has been improved and fixed, mainly to support - `make' on Windows 2000 correctly, avoid problems with `make - distclean' on non Unix systems, etc. - - - Hexadecimal constants have been suffixed with `U' to avoid - problems with certain compilers on 64-bit platforms. - - - A new directory named `src/tools' has been created. It contains - Python scripts and simple unit test programs used to develop the - library. - - - The DocMaker tool has been moved from `docs' to `src/tools' and - has been updated with the following: - - - Now accepts the `--title=XXXX' or `-t XXXX' option from the - command line to set the project's name in the generated API - reference. - - - Now accepts the `--output=DIR' or `-o DIR' option from the - command line to set the output directory for all generated - HTML files. - - - Now accepts the `--prefix=XXXX' or `-p XXX' option from the - command line to set the file prefix to use for all - generated HTML files. - - - Now generates the current time/data on each generated page - in order to distinguish between versions. - - DocMaker can be used with other projects now, not only FT2 - (e.g. MLib, FTLayout, etc.). - - -====================================================================== - -CHANGES BETWEEN 2.0.2 and 2.0.1 - - I. CHANGES TO THE MODULES / FONT DRIVERS - - - THE TRUETYPE BYTECODE INTERPRETER IS NOW TURNED OFF, in order to - avoid legal problems with the Apple patents. It seems that we - mistakenly turned this option on in previous releases of the - build. - - Note that if you want to use the bytecode interpreter in order - to get high-quality TrueType rendering, you will need to toggle - by hand the definition of the - TT_CONFIG_OPTION_BYTECODE_INTERPRETER macro in the file - `include/freetype/config/ftoption.h'. - - - The CFF driver has been improved by Tom Kacvinsky and Sander van - der Wal: - - * Support for `seac' emulation. - * Support for `dotsection'. - * Support for retrieving glyph names through - `FT_Get_Glyph_Name'. - - The first two items are necessary to correctly a large number of - Type 1 fonts converted to the CFF formats by Adobe Acrobat. - - - The Type 1 driver was also improved by Tom & others: - - * Better EM size computation. - * Better support for synthetic (transformed) fonts. - * The Type 1 driver returns the charstrings corresponding to - each glyph in the `glyph->control_data' field after a call to - `FT_Load_Glyph' (thanks Ha Shao). - - - Various other bugfixes, including the following: - - * Fixed a nasty memory leak in the Type 1 driver. - * The autohinter and the pcf driver used static writable data - when they shouldn't. - * Many casts were added to make the code more 64-bits safe. It - also now compiles on Windows XP 64-bits without warnings. - * Some incorrect writable statics were removed in the `autohint' - and `pcf' drivers. FreeType 2 now compiles on Epoc again. - - - II. CHANGES TO THE HIGH-LEVEL API - - - The library header files inclusion scheme has been changed. The - old scheme looked like: - - #include - #include - #include - #include - - Now you should use: - - #include - #include FT_FREETYPE_H - #include FT_GLYPH_H - #include FT_CACHE_H - #include FT_CACHE_IMAGE_H - - NOTE THAT THE OLD INCLUSION SCHEME WILL STILL WORK WITH THIS - RELEASE. HOWEVER, WE DO NOT GUARANTEE THAT THIS WILL STILL BE - TRUE IN THE NEXT ONE (A.K.A. FREETYPE 2.1). - - The file is used to define the header filename - macros. The complete and commented list of macros is available - in the API reference under the section name `Header File Macros' - in Chapter I. - - For more information, see section I of the following document: - - https://www.freetype.org/freetype2/docs/tutorial/step1.html - - - Many, many comments have been added to the public source file in - order to automatically generate the API Reference through the - `docmaker.py' Python script. - - The latter has been updated to support the grouping of sections - in chapters and better index sort. See: - - https://www.freetype.org/freetype2/docs/reference/ft2-toc.html - - - III. CHANGES TO THE BUILD PROCESS - - - If you are not building FreeType 2 with its own build system - (but with your own Makefiles or project files), you will need to - be aware that the build process has changed a little bit. - - You don't need to put the `src' directory in the include path - when compiling any FT2 component. Instead, simply put the - component's directory in the current include path. - - So, if you were doing something like: - - cc -c -Iinclude -Isrc src/base/ftbase.c - - change the line to: - - cc -c -Iinclude -Isrc/base src/base/ftbase.c - - If you were doing something like: - - cd src/base - cc -c -I../../include -I.. ftbase.c - - change it to: - - cd src/base - cc -c -I../../include ftbase.c - - -====================================================================== - -CHANGES BETWEEN 2.0.1 and 2.0 - - 2.0.1 introduces a few changes: - - - Fixed many bugs related to the support of CFF / OpenType fonts. - These formats are now much better supported though there is - still work planned to deal with charset tables and PDF-embedded - CFF files that use the old `seac' command. - - - The library could not be compiled in debug mode with a very - small number of C compilers whose pre-processors didn't - implement the `##' directive correctly (i.e. per se the ANSI C - specification!) An elegant fix was found. - - - Added support for the free Borland command-line C++ Builder - compiler. Use `make setup bcc32'. Also fixed a few source - lines that generated new warnings with BCC32. - - - Fixed a bug in FT_Outline_Get_BBox when computing the extrema of - a conic Bezier arc. - - - Updated the INSTALL file to add IDE compilation. - - - Other minor bug fixes, from invalid Type 1 style flags to - correct support of synthetic (obliqued) fonts in the - auto-hinter, better support for embedded bitmaps in a SFNT font. - - - Fixed some problems with `freetype-config'. - - Finally, the `standard' scheme for including FreeType headers is now - gradually changing, but this will be explained in a later release - (probably 2.0.2). - - And very special thanks to Tom Kacvinsky and YAMANO-UCHI Hidetoshi - for their contributions! - - -====================================================================== - -CHANGES BETWEEN beta8 and 2.0 - - - Changed the default installation path for public headers from - `include/freetype' to `include/freetype2'. - - Also added a new `freetype-config' that is automatically generated - and installed on Unix and Cygwin systems. The script itself is - used to retrieve the current install path, C compilation flags as - well as linker flags. - - - Fixed several small bugs: - - * Incorrect max advance width for fixed-pitch Type 1 fonts. - * Incorrect glyph names for certain TrueType fonts. - * The glyph advance was not copied when FT_Glyph_To_Bitmap was - called. - * The linearHoriAdvance and linearVertAdvance fields were not - correctly returned for glyphs processed by the auto-hinter. - * `type1z' renamed back to `type1'; the old `type1' module has - been removed. - - - Revamped the build system to make it a lot more generic. This - will allow us to re-use nearly un-modified in lots of other - projects (including FreeType Layout). - - - Changed `cid' to use `psaux' too. - - - Added the cache sub-system. See as well as - the sources in `src/cache'. Note that it compiles but is still - untested for now. - - - Updated `docs/docmaker.py', a draft API reference is available at - https://web.archive.org/web/20001215173400/http://www.freetype.org:80/ft2api.html. - - - Changed `type1' to use `psaux'. - - - Created a new module named `psaux' to hold the Type 1 & Type 2 - parsing routines. It should be used by `type1', `cid', and `cff' - in the future. - - - Fixed an important bug in `FT_Glyph_Get_CBox'. - - - Fixed some compiler warnings that happened since the TrueType - bytecode decoder was deactivated by default. - - - Fixed two memory leaks: - - * The memory manager (16 bytes) isn't released in - FT_Done_FreeType! - * Using custom input streams, the copy of the original stream was - never released. - - - Fixed the auto-hinter by performing automatic computation of the - `filling direction' of each glyph. This is done through a simple - and fast approximation, and seems to work (problems spotted by - Werner though). The Arphic fonts are a lot nicer though there are - still a lot of things to do to handle Asian fonts correctly. - - -====================================================================== - -BETA-8 (RELEASE CANDIDATE) CHANGES - - - Deactivated the TrueType bytecode interpreter by default. - - - Deactivated the `src/type1' font driver. Now `src/type1z' is used - by default. - - - Updates to the build system. We now compile the library correctly - under Unix system through `configure' which is automatically - called on the first `make' invocation. - - - Added the auto-hinting module! Fixing some bugs here and there. - - - Found some bugs in the composite loader (seac) of the Type1-based - font drivers. - - - Renamed the directory `freetype2/config' to `freetype2/builds' and - updated all relevant files. - - - Found a memory leak in the `type1' driver. - - - Incorporated Tom's patches to support flex operators correctly in - OpenType/CFF fonts. Now all I need is to support pure CFF and CEF - fonts to be done with this driver :-) - - - Added the Windows FNT/FON driver in `src/winfonts'. For now, it - always `simulates' a Unicode charmap, so it shouldn't be - considered completed right now. - - It is there to be more a proof of concept than anything else - anyway. The driver is a single C source file, that compiles to 3 - Kb of code. - - I'm still working on the PCF/BDF drivers, but I'm too lazy to - finish them now. - - - CHANGES TO THE HIGH-LEVEL API - - * FT_Get_Kerning has a new parameter that allows you to select the - coordinates of the kerning vector (font units, scaled, scaled + - grid-fitted). - * The outline functions are now in and not - part of anymore. - * now contains declarations for - FT_New_Library, FT_Done_Library, FT_Add_Default_Modules. - * The so-called convenience functions have moved from `ftoutln.c' - to `ftglyph.c', and are thus available with this optional - component of the library. They are declared in - now. - * Anti-aliased rendering is now the default for FT_Render_Glyph - (i.e. corresponds to render_mode == 0 == ft_render_mode_normal). - To generate a monochrome bitmap, use ft_render_mode_mono, or the - FT_LOAD_MONOCHROME flag in FT_Load_Glyph/FT_Load_Char. - FT_LOAD_ANTI_ALIAS is still defined, but values to 0. - * now include , - solving a few headaches :-) - * The type FT_GlyphSlotRec has now a `library' field. - - - CHANGES TO THE `ftglyph.h' API - - This API has been severely modified in order to make it simpler, - clearer, and more efficient. It certainly now looks like a real - `glyph factory' object, and allows client applications to manage - (i.e. transform, bbox and render) glyph images without ever - knowing their original format. - - - Added support for CID-keyed fonts to the CFF driver. Maybe - support for pure CFF + CEF fonts should come in? - - - Cleaned up source code in order to avoid two functions with the - same name. Also changed the names of the files in `type1z' from - `t1XXXX' to `z1XXXX' in order to avoid any conflicts. - - `make multi' now works well :-) - - Also removed the use of `cidafm' for now, even if the source files - are still there. This functionality will certainly go into a - specific module. - - - ADDED SUPPORT FOR THE AUTO-HINTER - - It works :-) I have a demo program which simply is a copy of - `ftview' that does a `FT_Add_Module(library, - &autohinter_module_class)' after library initialization, and Type - 1 & OpenType/CFF fonts are now hinted. - - CID fonts are not hinted, as they include no charmap and the - auto-hinter doesn't include `generic' global metrics computations - yet. - - Now, I need to release this thing to the FreeType 2 source. - - - CHANGES TO THE RENDERER MODULES - - The monochrome and smooth renderers are now in two distinct - directories, namely `src/raster1' and `src/smooth'. Note that the - old `src/renderer' is now gone. - - I ditched the 5-gray-levels renderers. Basically, it involved a - simple #define toggle in 'src/raster1/ftraster.c'. - - FT_Render_Glyph, FT_Outline_Render & FT_Outline_Get_Bitmap now - select the best renderer available, depending on render mode. If - the current renderer for a given glyph image format isn't capable - of supporting the render mode, another one will be found in the - library's list. This means that client applications do not need - to switch or set the renderers themselves (as in the latest - change), they'll get what they want automatically. At last. - - Changed the demo programs accordingly. - - - MAJOR INTERNAL REDESIGN: - - A lot of internal modifications have been performed lately on the - source in order to provide the following enhancements: - - * More generic module support: - - The FT_Module type is now defined to represent a handle to a - given module. The file contains the - FT_Module_Class definition, as well as the module-loading public - API. - - The FT_Driver type is still defined, and still represents a - pointer to a font driver. Note that FT_Add_Driver is replaced - by FT_Add_Module, FT_Get_Driver by FT_Get_Module, etc. - - * Support for generic glyph image types: - - The FT_Renderer type is a pointer to a module used to perform - various operations on glyph image. - - Each renderer is capable of handling images in a single format - (e.g. ft_glyph_format_outline). Its functions are used to: - - - transform an glyph image - - render a glyph image into a bitmap - - return the control box (dimensions) of a given glyph image - - The scan converters `ftraster.c' and `ftgrays.c' have been moved - to the new directory `src/renderer', and are used to provide two - default renderer modules. - - One corresponds to the `standard' scan-converter, the other to - the `smooth' one. - - he current renderer can be set through the new function - FT_Set_Renderer. - - The old raster-related function FT_Set_Raster, FT_Get_Raster and - FT_Set_Raster_Mode have now disappeared, in favor of the new: - - FT_Get_Renderer - FT_Set_Renderer - - See the file for more details. - - These changes were necessary to properly support different - scalable formats in the future, like bi-color glyphs, etc. - - * Glyph loader object: - - A new internal object, called a 'glyph loader' has been - introduced in the base layer. It is used by all scalable format - font drivers to load glyphs and composites. - - This object has been created to reduce the code size of each - driver, as each one of them basically re-implemented its - functionality. - - See and the FT_GlyphLoader type for - more information. - - * FT_GlyphSlot has new fields: - - In order to support extended features (see below), the - FT_GlyphSlot structure has a few new fields: - - linearHoriAdvance: - - This field gives the linearly scaled (i.e. scaled but - unhinted) advance width for the glyph, expressed as a 16.16 - fixed pixel value. This is useful to perform WYSIWYG text. - - linearVertAdvance: - This field gives the linearly scaled advance height for the - glyph (relevant in vertical glyph layouts only). This is - useful to perform WYSIWYG text. - - Note that the two above field replace the removed `metrics2' - field in the glyph slot. - - advance: - This field is a vector that gives the transformed advance for - the glyph. By default, it corresponds to the advance width, - unless FT_LOAD_VERTICAL_LAYOUT was specified when calling - FT_Load_Glyph or FT_Load_Char. - - bitmap_left: - This field gives the distance in integer pixels from the - current pen position to the left-most pixel of a glyph image - IF IT IS A BITMAP. It is only valid when the `format' field - is set to `ft_glyph_format_bitmap', for example, after calling - the new function FT_Render_Glyph. - - bitmap_top: - This field gives the distance in integer pixels from the - current pen position (located on the baseline) to the top-most - pixel of the glyph image IF IT IS A BITMAP. Positive values - correspond to upwards Y. - - loader: - This is a new private field for the glyph slot. Client - applications should not touch it. - - - * Support for transforms and direct rendering in FT_Load_Glyph: - - Most of the functionality found in has been - moved to the core library. Hence, the following: - - - A transform can be specified for a face through - FT_Set_Transform. this transform is applied by FT_Load_Glyph - to scalable glyph images (i.e. NOT TO BITMAPS) before the - function returns, unless the bit flag FT_LOAD_IGNORE_TRANSFORM - was set in the load flags. - - - Once a glyph image has been loaded, it can be directly - converted to a bitmap by using the new FT_Render_Glyph - function. Note that this function takes the glyph image from - the glyph slot, and converts it to a bitmap whose properties - are returned in `face.glyph.bitmap', `face.glyph.bitmap_left' - and `face.glyph.bitmap_top'. The original native image might - be lost after the conversion. - - - When using the new bit flag FT_LOAD_RENDER, the FT_Load_Glyph - and FT_Load_Char functions will call FT_Render_Glyph - automatically when needed. - - - Reformatted all modules source code in order to get rid of the - basic data types redefinitions (i.e. `TT_Int' instead of `FT_Int', - `T1_Fixed' instead of `FT_Fixed'). Hence the format-specific - prefixes like `TT_', `T1_', `T2_' and `CID_' are only used for - relevant structures. - - -====================================================================== - -OLD CHANGES FOR BETA 7 - - - bug-fixed the OpenType/CFF parser. It now loads and displays my - two fonts nicely, but I'm pretty certain that more testing is - needed :-) - - - fixed the crummy Type 1 hinter, it now handles accented characters - correctly (well, the accent is not always well placed, but that's - another problem..) - - - added the CID-keyed Type 1 driver in `src/cid'. Works pretty well - for only 13 Kb of code ;-) Doesn't read AFM files though, nor the - really useful CMAP files.. - - - fixed two bugs in the smooth renderer (src/base/ftgrays.c). - Thanks to Boris Letocha for spotting them and providing a fix. - - - fixed potential `divide by zero' bugs in ftcalc.c. - - - added source code for the OpenType/CFF driver (still incomplete - though..) - - - modified the SFNT driver slightly to perform more robust header - checks in TT_Load_SFNT_Header. This prevents certain font files - (e.g. some Type 1 Multiple Masters) from being incorrectly - `recognized' as TrueType font files.. - - - moved a lot of stuff from the TrueType driver to the SFNT module, - this allows greater code re-use between font drivers - (e.g. TrueType, OpenType, Compact-TrueType, etc..) - - - added a tiny segment cache to the SFNT Charmap 4 decoder, in order - to minimally speed it up.. - - - added support for Multiple Master fonts in `type1z'. There is - also a new file named which defines functions to - manage them from client applications. - - The new file `src/base/ftmm.c' is also optional to the engine.. - - - various formatting changes (e.g. EXPORT_DEF -> FT_EXPORT_DEF) + - small bug fixes in FT_Load_Glyph, the `type1' driver, etc.. - - - a minor fix to the Type 1 driver to let them apply the font matrix - correctly (used for many oblique fonts..) - - - some fixes for 64-bit systems (mainly changing some FT_TRACE calls - to use %p instead of %lx). Thanks to Karl Robillard. - - - fixed some bugs in the sbit loader (src/base/sfnt/ttsbit.c) + - added a new flag, FT_LOAD_CROP_BITMAP to query that bitmaps be - cropped when loaded from a file (maybe I should move the bitmap - cropper to the base layer ??). - - - changed the default number of gray levels of the smooth renderer - to 256 (instead of the previous 128). Of course, the human eye - can't see any difference ;-) - - - removed TT_MAX_SUBGLYPHS, there is no static limit on the number - of subglyphs in a TrueType font now.. - - -====================================================================== - -OLD CHANGES 16 May 2000 - - - tagged `BETA-6' in the CVS tree. This one is a serious release - candidate even though it doesn't incorporate the auto-hinter yet.. - - - various obsolete files were removed, and copyright header updated - - - finally updated the standard raster to fix the monochrome - rendering bug + re-enable support for 5-gray levels anti-aliasing - (suck, suck..) - - - created new header files, and modified sources accordingly: - - - - simple FreeType types, without the API - - - definition of memory-management macros - - - added the `DSIG' (OpenType Digital Signature) tag to - - - - light update/cleaning of the build system + changes to the sources - in order to get rid of _all_ compiler warnings with three - compilers, i.e: - - gcc with `-ansi -pedantic -Wall -W', Visual C++ with `/W3 /WX' and - LCC - - IMPORTANT NOTE FOR WIN32-LCC USERS: - | - | It seems the C pre-processor that comes with LCC is broken, it - | doesn't recognize the ANSI standard directives # and ## - | correctly when one of the argument is a macro. Also, - | something like: - | - | #define F(x) print##x - | - | F(("hello")) - | - | will get incorrectly translated to: - | - | print "hello") - | - | by its pre-processor. For this reason, you simply cannot build - | FreeType 2 in debug mode with this compiler.. - - - yet another massive grunt work. I've changed the definition of - the EXPORT_DEF, EXPORT_FUNC, BASE_DEF & BASE_FUNC macros. These - now take an argument, which is the function's return value type. - - This is necessary to compile FreeType as a DLL on Windows and - OS/2. Depending on the compiler used, a compiler-specific keyword - like __export or __system must be placed before (VisualC++) or - after (BorlandC++) the type.. - - Of course, this needed a lot of changes throughout the source code - to make it compile again... All cleaned up now, apparently.. - - Note also that there is a new EXPORT_VAR macro defined to allow - the _declaration_ of an exportable public (constant) - variable. This is the case of the raster interfaces (see - ftraster.h and ftgrays.h), as well as each module's interface (see - sfdriver.h, psdriver.h, etc..) - - - new feature: it is now possible to pass extra parameters to font - drivers when creating a new face object. For now, - this capability is unused. It could however prove to - be useful in a near future.. - - the FT_Open_Args structure was changes, as well as the internal - driver interface (the specific `init_face' module function has - now a different signature). - - - updated the tutorial (not finished though). - - - updated the top-level BUILD document - - - fixed a potential memory leak that could occur when loading - embedded bitmaps. - - - added the declaration of FT_New_Memory_Face in - , as it was missing from the public header - (the implementation was already in `ftobjs.c'). - - - the file has been seriously updated in order - to allow the automatic generation of error message tables. See - the comments within it for more information. - - - major directory hierarchy re-organisation. This was done for two - things: - - * first, to ease the `manual' compilation of the library by - requiring at lot less include paths :-) - - * second, to allow external programs to effectively access - internal data fields. For example, this can be extremely - useful if someone wants to write a font producer or a font - manager on top of FreeType. - - Basically, you should now use the 'freetype/' prefix for header - inclusion, as in: - - #include - #include - - Some new include sub-directories are available: - - a. the `freetype/config' directory, contains two files used to - configure the build of the library. Client applications - should not need to look at these normally, but they can if - they want. - - #include - #include - - b. the `freetype/internal' directory, contains header files that - describes library internals. These are the header files that - were previously found in the `src/base' and `src/shared' - directories. - - - As usual, the build system and the demos have been updated to - reflect the change.. - - Here's a layout of the new directory hierarchy: - - TOP_DIR - include/ - freetype/ - freetype.h - ... - config/ - ftoption.h - ftconfig.h - ftmodule.h - - internal/ - ftobjs.h - ftstream.h - ftcalc.h - ... - - src/ - base/ - ... - - sfnt/ - psnames/ - truetype/ - type1/ - type1z/ - - - Compiling a module is now much easier, for example, the following - should work when in the TOP_DIR directory on an ANSI build: - - gcc -c -I./include -I./src/base src/base/ftbase.c - gcc -c -I./include -I./src/sfnt src/sfnt/sfnt.c - etc.. - - (of course, using -Iconfig/ if you provide system-specific - configuration files). - - - updated the structure of FT_Outline_Funcs in order to allow direct - coordinate scaling within the outline decomposition routine (this - is important for virtual `on' points with TrueType outlines) + - updates to the rasters to support this.. - - - updated the OS/2 table loading code in `src/sfnt/ttload.c' in - order to support version 2 of the table (see OpenType 1.2 spec) - - - created `include/tttables.h' and `include/t1tables.h' to allow - client applications to access some of the SFNT and T1 tables of a - face with a procedural interface (see `FT_Get_Sfnt_Table') + - updates to internal source files to reflect the change.. - - - some cleanups in the source code to get rid of warnings when - compiling with the `-Wall -W -ansi -pedantic' options in gcc. - - - debugged and moved the smooth renderer to `src/base/ftgrays.c' and - its header to `include/ftgrays.h' - - - updated TT_MAX_SUBGLYPHS to 96 as some CJK fonts have composites - with up to 80 sub-glyphs !! Thanks to Werner - - -====================================================================== - -OLD CHANGES - 14-apr-2000 - - - fixed a bug in the TrueType glyph loader that prevented the - correct loading of some CJK glyphs in mingli.ttf - - - improved the standard Type 1 hinter in `src/type1' - - - fixed two bugs in the experimental Type 1 driver in `src/type1z' - to handle the new XFree86 4.0 fonts (and a few other ones..) - - - the smooth renderer is now complete and supports sub-banding to - render large glyphs at high speed. However, it is still located - in `demos/src/ftgrays.c' and should move to the library itself in - the next beta. NOTE: The smooth renderer doesn't compile in - stand-alone mode anymore, but this should be fixed RSN.. - - - introduced convenience functions to more easily deal with glyph - images, see `include/ftglyph.h' for more details, as well as the - new demo program named `demos/src/ftstring.c' that demonstrates - its use - - - implemented FT_LOAD_NO_RECURSE in both the TrueType and Type 1 - drivers (this is required by the auto-hinter to improve its - results). - - - changed the raster interface, in order to allow client - applications to provide their own span-drawing callbacks. - However, only the smooth renderer supports this. See - `FT_Raster_Params' in the file `include/ftimage.h'. - - - fixed a small bug in FT_MulFix that caused incorrect transform - computation! - - - Note: The tutorial is out-of-date. - - -====================================================================== - -OLD CHANGES - 12-mar-2000 - - - changed the layout of configuration files : now, all ANSI - configuration files are located in - `freetype2/config'. System-specific over-rides can be placed in - `freetype2/config/'. - - - moved all configuration macros to `config/ftoption.h' - - - improvements in the Type 1 driver with AFM support - - - changed the fields in the FT_Outline structure : the old `flags' - array is re-named `tags', while all ancient flags are encoded into - a single unsigned int named `flags'. - - - introduced new flags in FT_Outline.flags (see - ft_outline_.... enums in `ftimage.h'). - - - changed outline functions to `FT_Outline_' syntax - - - added a smooth anti-alias renderer to the demonstration programs - - - added Mac graphics driver (thanks Just) - - - FT_Open_Face changed in order to received a pointer to a - FT_Open_Args descriptor.. - - - various cleanups, a few more API functions implemented (see - FT_Attach_File) - - - updated some docs - - -====================================================================== - -OLD CHANGES - 22-feb-2000 - - - introduced the `psnames' module. It is used to: - - o convert a Postscript glyph name into the equivalent Unicode - character code (used by the Type 1 driver(s) to synthesize on - the fly a Unicode charmap). - - o provide an interface to retrieve the Postscript names of the - Macintosh, Adobe Standard & Adobe Expert character codes. - (the Macintosh names are used by the SFNT-module postscript - names support routines, while the other two tables are used by - the Type 1 driver(s)). - - - introduced the `type1z' alternate Type 1 driver. This is a (still - experimental) driver for the Type 1 format that will ultimately - replace the one in `src/type1'. It uses pattern matching to load - data from the font, instead of a finite state analyzer. It works - much better than the `old' driver with `broken' fonts. It is also - much smaller (under 15 Kb). - - - the Type 1 drivers (both in `src/type1' and `src/type1z') are - nearly complete. They both provide automatic Unicode charmap - synthesis through the `psnames' module. No re-encoding vector is - needed. (note that they still leak memory due to some code - missing, and I'm getting lazy). - - Trivial AFM support has been added to read kerning information but - wasn't exactly tested as it should ;-) - - - The TrueType glyph loader has been seriously rewritten (see the - file `src/truetype/ttgload.c'. It is now much, much simpler as - well as easier to read, maintain and understand :-) Preliminary - versions introduced a memory leak that has been reported by Jack - Davis, and is now fixed.. - - - introduced the new `ft_glyph_format_plotter', used to represent - stroked outlines like Windows `Vector' fonts, and certain Type 1 - fonts like `Hershey'. The corresponding raster will be written - soon. - - - FT_New_Memory_Face is gone. Likewise, FT_Open_Face has a new - interface that uses a structure to describe the input stream, the - driver (if required), etc.. - - -TODO - - - Write FT_Get_Glyph_Bitmap and FT_Load_Glyph_Bitmap - - - Add a function like FT_Load_Character(face, char_code, load_flags) - that would really embed a call to FT_Get_Char_Index then - FT_Load_Glyph to ease developer's work. - - - Update the tutorial! - - - consider adding support for Multiple Master fonts in the Type 1 - drivers. - - - Test the AFM routines of the Type 1 drivers to check that kerning - information is returned correctly. - - - write a decent auto-gridding component !! We need this to release - FreeType 2.0 gold ! - - -less urgent needs: - - - add a CFF/Type2 driver - - add a BDF driver - - add a FNT/PCF/HBF driver - - add a Speedo driver from the X11 sources - - -====================================================================== - -OLDER CHANGES - 27-jan-2000 - - - updated the `sfnt' module interface to allow several SFNT-based - drivers to co-exist peacefully - - - updated the `T1_Face' type to better separate Postscript font - content from the rest of the FT_Face structure. Might be used - later by the CFF/Type2 driver.. - - - added an experimental replacement Type 1 driver featuring advanced - (and speedy) pattern matching to retrieve the data from postscript - fonts. - - - very minor changes in the implementation of FT_Set_Char_Size and - FT_Set_Pixel_Sizes (they now implement default to lighten the font - driver's code). - - -====================================================================== - -OLD MESSAGE - -This file summarizes the changes that occurred since the last `beta' -of FreeType 2. Because the list is important, it has been divided into -separate sections: - -Table Of Contents: - - I High-Level Interface (easier !) - II Directory Structure - III Glyph Image Formats - IV Build System - V Portability - VI Font Drivers - - ----------------------------------------------------------------------- - -High-Level Interface: - - The high-level API has been considerably simplified. Here is how: - - - resource objects have disappeared. this means that face objects - can now be created with a single function call (see FT_New_Face - and FT_Open_Face) - - - when calling either FT_New_Face & FT_Open_Face, a size object - and a glyph slot object are automatically created for the face, - and can be accessed through `face->glyph' and `face->size' if - one really needs to. In most cases, there's no need to call - FT_New_Size or FT_New_Glyph. - - - similarly, FT_Load_Glyph now only takes a `face' argument - (instead of a glyph slot and a size). Also, its `result' - parameter is gone, as the glyph image type is returned in the - field `face->glyph.format' - - - the list of available charmaps is directly accessible through - `face->charmaps', counting `face->num_charmaps' elements. Each - charmap has an 'encoding' field which specifies which known - encoding it deals with. Valid values are, for example: - - ft_encoding_unicode (for ASCII, Latin-1 and Unicode) - ft_encoding_apple_roman - ft_encoding_sjis - ft_encoding_adobe_standard - ft_encoding_adobe_expert - - other values may be added in the future. Each charmap still - holds its `platform_id' and `encoding_id' values in case the - encoding is too exotic for the current library - - ----------------------------------------------------------------------- - -Directory Structure: - - Should seem obvious to most of you: - - freetype/ - config/ -- configuration sub-makefiles - ansi/ - unix/ -- platform-specific configuration files - win32/ - os2/ - msdos/ - - include/ -- public header files, those to be included - directly by client apps - - src/ -- sources of the library - base/ -- the base layer - sfnt/ -- the sfnt `driver' (see the drivers section - below) - truetype/ -- the truetype driver - type1/ -- the type1 driver - shared/ -- some header files shared between drivers - - demos/ -- demos/tools - - docs/ -- documentation (a bit empty for now) - - ----------------------------------------------------------------------- - -Glyph Image Formats: - - Drivers are now able to register new glyph image formats within the - library. For now, the base layer supports of course bitmaps and - vector outlines, but one could imagine something different like - colored bitmaps, bi-color vectors or whatever else (Metafonts anyone - ??). - - See the file `include/ftimage.h'. Note also that the type - FT_Raster_Map is gone, and is now replaced by FT_Bitmap, which - should encompass all known bitmap types. - - Each new image format must provide at least one `raster', i.e. a - module capable of transforming the glyph image into a bitmap. It's - also possible to change the default raster used for a given glyph - image format. - - The default outline scan-converter now uses 128 levels of grays by - default, which tends to smooth many things. Note that the demo - programs have been updated significantly in order to display these.. - - ----------------------------------------------------------------------- - -Build system: - - You still need GNU Make to build the library. The build system has - been very seriously re-vamped in order to provide things like : - - - automatic host platform detection (reverting to 'config/ansi' if - it is not detected, with pseudo-standard compilation flags) - - - the ability to compile from the Makefiles with very different and - exotic compilers. Note that linking the library can be difficult - for some platforms. - - For example, the file `config/win32/lcclib.bat' is invoked by the - build system to create the `.lib' file with LCC-Win32 because its - librarian has too many flaws to be invoked directly from the - Makefile. - - Here's how it works: - - - the first time you type `make', the build system runs a series of - sub-makefiles in order to detect your host platform. It then - dumps what it found, and creates a file called `config.mk' in the - current directory. This is a sub-Makefile used to define many - important Make variables used to build the library. - - - the second time, the build system detects the `config.mk' then use - it to build the library. All object files go into 'obj' by - default, as well as the library file, but this can easily be - changed. - - Note that you can run `make setup' to force another host platform - detection even if a `config.mk' is present in the current - directory. Another solution is simply to delete the file, then - re-run make. - - Finally, the default compiler for all platforms is gcc (for now, - this will hopefully changed in the future). You can however specify - a different compiler by specifying it after the 'setup' target as - in: - - gnumake setup lcc on Win32 to use the LCC compiler - gnumake setup visualc on Win32 to use Visual C++ - - See the file `config//detect.mk' for a list of supported - compilers for your platforms. - - It should be relatively easy to write new detection rules files and - config.mk.. - - Finally, to build the demo programs, go to `demos' and launch GNU - Make, it will use the `config.mk' in the top directory to build the - test programs.. - - ----------------------------------------------------------------------- - -Portability: - - In the previous beta, a single FT_System object was used to - encompass all low-level operations like thread synchronisation, - memory management and i/o access. This has been greatly simplified: - - - thread synchronisation has been dropped, for the simple reason - that the library is already re-entrant, and that if you really - need two threads accessing the same FT_Library, you should - really synchronize access to it yourself with a simple mutex. - - - memory management is performed through a very simple object - called `FT_Memory', which really is a table containing a table - of pointers to functions like malloc, realloc and free as well - as some user data (closure). - - - resources have disappeared (they created more problems than they - solved), and i/o management have been simplified greatly as a - result. Streams are defined through FT_Stream objects, which - can be either memory-based or disk-based. - - Note that each face has its own stream, which is closed only - when the face object is destroyed. Hence, a function like - TT_Flush_Face in 1.x cannot be directly supported. However, if - you really need something like this, you can easily tailor your - own streams to achieve the same feature at a lower level (and - use FT_Open_Face instead of FT_New_Face to create the face). - - See the file `include/ftsystem.h' for more details, as well as the - implementations found in `config/unix' and `config/ansi'. - - ----------------------------------------------------------------------- - -Font Drivers: - - The Font Driver interface has been modified in order to support - extensions & versioning. - - - The list of the font drivers that are statically linked to the - library at compile time is managed through a new configuration file - called `config//ftmodule.h'. - - This file is autogenerated when invoking `make modules'. This - target will parse all sub-directories of 'src', looking for a - `module.mk' rules file, used to describe the driver to the build - system. - - Hence, one should call `make modules' each time a font driver is - added or removed from the `src' directory. - - Finally, this version provides a `pseudo-driver' in `src/sfnt'. - This driver doesn't support font files directly, but provides - services used by all TrueType-like font drivers. Hence, its code is - shared between the TrueType & OpenType font formats, and possibly - more formats to come if we're lucky.. - - ----------------------------------------------------------------------- - -Extensions support: - - The extensions support is inspired by the one found in 1.x. - - Now, each font driver has its own `extension registry', which lists - which extensions are available for the font faces managed by the - driver. - - Extension ids are now strings, rather than 4-byte tags, as this is - usually more readable. - - Each extension has: - - some data, associated to each face object - - an interface (table of function pointers) - - An extension that is format-specific should simply register itself - to the correct font driver. Here is some example code: - - // Registering an extensions - // - FT_Error FT_Init_XXXX_Extension( FT_Library library ) - { - FT_DriverInterface* tt_driver; - - driver = FT_Get_Driver( library, "truetype" ); - if (!driver) return FT_Err_Unimplemented_Feature; - - return FT_Register_Extension( driver, &extension_class ); - } - - - // Implementing the extensions - // - FT_Error FT_Proceed_Extension_XXX( FT_Face face ) - { - FT_XXX_Extension ext; - FT_XXX_Extension_Interface ext_interface; - - ext = FT_Get_Extension( face, "extensionid", &ext_interface ); - if (!ext) return error; - - return ext_interface->do_it(ext); - } - ------------------------------------------------------------------------- - -Copyright (C) 2000-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - -Local Variables: -version-control: never -coding: utf-8 -End: - ---- end of CHANGES --- diff --git a/ThirdParty/freetype/docs/CMAKE b/ThirdParty/freetype/docs/CMAKE deleted file mode 100644 index 31237ae..0000000 --- a/ThirdParty/freetype/docs/CMAKE +++ /dev/null @@ -1,2 +0,0 @@ -Support for a cmake build has been contributed. See the remarks in the -top-level `CMakeLists.txt' file for more. diff --git a/ThirdParty/freetype/docs/CUSTOMIZE b/ThirdParty/freetype/docs/CUSTOMIZE deleted file mode 100644 index f3f9f8e..0000000 --- a/ThirdParty/freetype/docs/CUSTOMIZE +++ /dev/null @@ -1,152 +0,0 @@ -How to customize the compilation of the library -=============================================== - - FreeType is highly customizable to fit various needs, and this - document describes how it is possible to select options and - components at compilation time. - - -I. Configuration macros - - The file `include/freetype/config/ftoption.h' contains a list of - commented configuration macros that can be toggled by developers to - indicate which features should be active while building the library. - - These options range from debug level to availability of certain - features, like native TrueType hinting through a bytecode - interpreter. - - We invite you to read this file for more information. You can - change the file's content to suit your needs, or override it with - one of the techniques described below. - - -II. Modules list - - If you use GNU make please edit the top-level file `modules.cfg'. - It contains a list of available FreeType modules and extensions to - be compiled. Change it to suit your own preferences. Be aware that - certain modules depend on others, as described in the file. GNU - make uses `modules.cfg' to generate `ftmodule.h' (in the object - directory). - - If you build FreeType in a directory separate from the source files, - put your customized `modules.cfg' in that directory; that way you - can keep the source files `clean'. - - If you don't use GNU make you have to manually edit the file - `include/freetype/config/ftmodule.h' (which is *not* used with if - compiled with GNU make) to add or remove the drivers and components - you want to compile into the library. See `INSTALL.ANY' for more - information. - - -III. System interface - - FreeType's default interface to the system (i.e., the parts that - deal with memory management and i/o streams) is located in - `src/base/ftsystem.c'. - - The current implementation uses standard C library calls to manage - memory and to read font files. It is however possible to write - custom implementations to suit specific systems. - - To tell the GNU Make-based build system to use a custom system - interface, you have to define the environment variable FTSYS_SRC to - point to the relevant implementation: - - on Unix: - - ./configure - export FTSYS_SRC=foo/my_ftsystem.c - make - make install - - on Windows: - - make setup - set FTSYS_SRC=foo/my_ftsystem.c - make - - -IV. Overriding default configuration and module headers - - It is possible to override the default configuration and module - headers without changing the original files. There are three ways - to do that: - - - 1. With GNU make - - [This is actually a combination of method 2 and 3.] - - Just put your custom `ftoption.h' file into the objects directory - (normally `/objs' if you build in the source tree, or the - directory where you invoke configure if you build in a separate - directory), which GNU make prefers over the standard location. No - action is needed for `ftmodule.h' because it is generated - automatically in the objects directory. - - 2. Using the C include path - - Use the C include path to ensure that your own versions of the - files are used at compile time when the lines - - #include FT_CONFIG_OPTIONS_H - #include FT_CONFIG_MODULES_H - - are compiled. Their default values being - and , you - can do something like: - - custom/ - config/ - ftoption.h => custom options header - ftmodule.h => custom modules list - - include/ => normal FreeType 2 include - ... - - then change the C include path to always give the path to `custom' - before the FreeType 2 `include'. - - - 3. Redefining FT_CONFIG_OPTIONS_H and FT_CONFIG_MODULES_H - - Another way to do the same thing is to redefine the macros used to - name the configuration headers. To do so, you need a custom - `ft2build.h' whose content can be as simple as: - - #ifndef FT2_BUILD_MY_PLATFORM_H_ - #define FT2_BUILD_MY_PLATFORM_H_ - - #define FT_CONFIG_OPTIONS_H - #define FT_CONFIG_MODULES_H - - #include - - #endif /* FT2_BUILD_MY_PLATFORM_H_ */ - - Place those files in a separate directory, e.g., - - custom/ - ft2build.h => custom version described above - my-ftoption.h => custom options header - my-ftmodule.h => custom modules list header - - and change the C include path to ensure that `custom' is always - placed before the FT2 `include' during compilation. - ----------------------------------------------------------------------- - -Copyright (C) 2003-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of CUSTOMIZE --- diff --git a/ThirdParty/freetype/docs/DEBUG b/ThirdParty/freetype/docs/DEBUG deleted file mode 100644 index 828f294..0000000 --- a/ThirdParty/freetype/docs/DEBUG +++ /dev/null @@ -1,203 +0,0 @@ -Debugging within the FreeType sources -===================================== - -I. Configuration macros ------------------------ - -There are several ways to enable debugging features in a FreeType 2 -builds. This is controlled through the definition of special macros -located in the file `ftoption.h'. The macros are: - - - FT_DEBUG_LEVEL_ERROR - - #define this macro if you want to compile the FT_ERROR macro calls - to print error messages during program execution. This will not - stop the program. Very useful to spot invalid fonts during - development and to code workarounds for them. - - FT_DEBUG_LEVEL_TRACE - - #define this macro if you want to compile both macros FT_ERROR and - FT_TRACE. This also includes the variants FT_TRACE0, FT_TRACE1, - FT_TRACE2, ..., FT_TRACE7. - - The trace macros are used to send debugging messages when an - appropriate `debug level' is configured at runtime through the - FT2_DEBUG environment variable (more on this later). - - FT_DEBUG_MEMORY - - If this macro is #defined, the FreeType engine is linked with a - small but effective debugging memory manager that tracks all - allocations and frees that are performed within the font engine. - - When the FT2_DEBUG_MEMORY environment variable is defined at - runtime, a call to FT_Done_FreeType will dump memory statistics, - including the list of leaked memory blocks with the source - locations where these were allocated. It is always a very good - idea to define this in development builds. This works with _any_ - program linked to FreeType, but requires a big deal of memory (the - debugging memory manager never frees the blocks to the heap in - order to detect double frees). - - When FT2_DEBUG_MEMORY isn't defined at runtime, the debugging - memory manager is ignored, and performance is unaffected. - - -II. Debugging macros --------------------- - -Several macros can be used within the FreeType sources to help -debugging its code: - - - 1. FT_ERROR(( ... )) - - This macro is used to send debug messages that indicate relatively - serious errors (like broken font files), but will not stop the - execution of the running program. Its code is compiled only when - either FT_DEBUG_LEVEL_ERROR or FT_DEBUG_LEVEL_TRACE are defined in - `ftoption.h'. - - Note that you have to use a printf-like signature, but with double - parentheses, like in - - FT_ERROR(( "your %s is not %s\n", "foo", "bar" )); - - - 2. FT_ASSERT( condition ) - - This macro is used to check strong assertions at runtime. If its - condition isn't TRUE, the program will abort with a panic message. - Its code is compiled when either FT_DEBUG_LEVEL_ERROR or - FT_DEBUG_LEVEL_TRACE are defined. You don't need double - parentheses here. For example - - FT_ASSERT( ptr != NULL ); - - - 3. FT_TRACE( level, (message...) ) - - The FT_TRACE macro is used to send general-purpose debugging - messages during program execution. This macro uses an *implicit* - macro named FT_COMPONENT used to name the current FreeType - component being run. - - The developer should always define FT_COMPONENT as appropriate, - for example as in - - #undef FT_COMPONENT - #define FT_COMPONENT io - - The value of the FT_COMPONENT macro is one of the component - names defined in the internal file `internal/fttrace.h'. If you - modify FreeType source and insert new FT_COMPONENT macro, you must - register it in `fttrace.h'. If you insert or remove many trace - macros, you can check the undefined or the unused trace macro by - `src/tools/chktrcmp.py'. - - Each such component is assigned a `debug level', ranging from 0 to - 7, through the use of the FT2_DEBUG environment variable - (described below) when a program linked with FreeType starts. - - When FT_TRACE is called, its level is compared to the one of the - corresponding component. Messages with trace levels *higher* than - the corresponding component level are filtered and never printed. - - This means that trace messages with level 0 are always printed, - those with level 2 are only printed when the component level is - *at least* 2. - - The second parameter to FT_TRACE must contain parentheses and - correspond to a printf-like call, as in - - FT_TRACE( 2, ( "your %s is not %s\n", "foo", "bar" ) ) - - The shortcut macros FT_TRACE0, FT_TRACE1, FT_TRACE2, ..., - FT_TRACE7 can be used with constant level indices, and are much - cleaner to use, as in - - FT_TRACE2(( "your %s is not %s\n", "foo", "bar" )); - - -III. Environment variables --------------------------- - -The following environment variables control debugging output and -behaviour of FreeType at runtime. - - - FT2_DEBUG - - This variable is only used when FreeType is built with - FT_DEBUG_LEVEL_TRACE defined. It contains a list of component - level definitions, following this format: - - component1:level1 component2:level2 component3:level3 ... - - where `componentX' is the name of a tracing component, as defined - in `fttrace.h'. `levelX' is the corresponding level to use at - runtime. - - `any' is a special component name that will be interpreted as - `any/all components'. For example, the following definitions - - set FT2_DEBUG=any:2 memory:5 io:4 (on Windows) - export FT2_DEBUG="any:2 memory:5 io:4" (on Linux with bash) - - both stipulate that all components should have level 2, except for - the memory and io components which will be set to trace levels 5 - and 4, respectively. - - - FT2_DEBUG_MEMORY - - This environment variable, when defined, tells FreeType to use a - debugging memory manager that will track leaking memory blocks as - well as other common errors like double frees. It is also capable - of reporting _where_ the leaking blocks were allocated, which - considerably saves time when debugging new additions to the - library. - - This code is only compiled when FreeType is built with the - FT_DEBUG_MEMORY macro #defined in `ftoption.h' though, it will be - ignored in other builds. - - - FT2_ALLOC_TOTAL_MAX - - This variable is ignored if FT2_DEBUG_MEMORY is not defined. It - allows you to specify a maximum heap size for all memory - allocations performed by FreeType. This is very useful to test - the robustness of the font engine and programs that use it in - tight memory conditions. - - If it is undefined, or if its value is not strictly positive, then - no allocation bounds are checked at runtime. - - - FT2_ALLOC_COUNT_MAX - - This variable is ignored if FT2_DEBUG_MEMORY is not defined. It - allows you to specify a maximum number of memory allocations - performed by FreeType before returning the error - FT_Err_Out_Of_Memory. This is useful for debugging and testing - the engine's robustness. - - If it is undefined, or if its value is not strictly positive, then - no allocation bounds are checked at runtime. - ------------------------------------------------------------------------- - -Copyright (C) 2002-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - ---- end of DEBUG --- diff --git a/ThirdParty/freetype/docs/DOCGUIDE b/ThirdParty/freetype/docs/DOCGUIDE deleted file mode 100644 index da76c88..0000000 --- a/ThirdParty/freetype/docs/DOCGUIDE +++ /dev/null @@ -1,298 +0,0 @@ -Introduction ------------- - -Documentation is an extremely important part of any project, and it -helps a lot if it uses consistent syntax and layout. - -The documentation for the FreeType library is maintained in header -files in the `include/` directory in the form of code comments. These -comments are extracted and organized by 'docwriter' (previously -'docmaker'). The generated docs can be viewed in the -`docs/reference/site/` directory after running `make refdoc`. - -Documentation comments follow a specific structure and format as -described below. - - -Documentation Structure ------------------------ - -The documentation is divided into multiple chapters, which contain -sections relevant to it. The chapter details and sections contained -in them are listed in `include/freetype/ftchapters.h`. Any unlisted -section is added to the 'Miscellaneous' chapter. - -Sections may contain sub-sections which consist of properties, -enumerations, and other data types. - - -Comment Blocks --------------- - -Documentation blocks follow a specific format: - - /***************************** (should end on column 77) - * - * (1 asterisk, 1 space, then content) - * - */ (end of block) - -To make 'docwriter' recognize a comment block, there must be at least -two asterisks in the first line. As a consequence, you should change -the second asterisk to something else if you want to prevent a comment -block being handled by 'docwriter' (for example, change `/****/` to -`/*#**/`). - - -Markup Tags ------------ - -Markup tags are used to indicate what comes next. The syntax for a -tag is: - - @foo: - -An `@`, followed by the tag, and then `:`. - - -Reserved Tags -------------- - -There are some keywords that have a special meaning to docwriter. -As a convention, all keywords are written in lowercase. - -* `chapter`: Defines a chapter. Usually the title with underscores. -* `sections`: List of sections in the chapter, in order. -* `section`: Defines the start or continuation of a section. -* `title`: Title for a chapter or section. May contain spaces. -* `abstract`: The abstract for a section, visible in the Table of - Contents (TOC). -* `description`: Detailed description of a tag (except chapters), - shown as synopsis. -* `values`: A list of 'values' for the tag. These values are used for - cross-referencing. - - -Other Tags ----------- - -Except the ones given above, any other tags will be added as a part of -a subsection. All tags are lowercase by convention. - - -Public Header Definitions -------------------------- - -The public headers for FreeType have their names defined in -`include/freetype/config/ftheader.h`. Any new public header file must -be defined in this file, in the following format: - - #define FT_NEWNAME_H - -Where `newname` is the name of the header file. - -This macro is combined with the file location of a sub-section and -printed with the object. - - -Note on code blocks captured after comments -------------------------------------------- - -All non-documentation lines after a documentation comment block are -captured to be displayed as the code for the sub-section. To stop -collection, a line with `/* */` should be added. - - -General Formatting Conventions ------------------------------- - -* Use two spaces after a full stop ending a sentence. -* Use appropriate uppercasing in titles. Refer - - https://english.stackexchange.com/a/34 - - for more information. -* Do not add trailing parentheses when citing a C function. - - -Markdown Usage --------------- - -All tags, except the ones that define the name and title for a block -support markdown in them. Docwriter uses a markdown parser that -follows rules given in John Gruber's markdown guide: - - https://daringfireball.net/projects/markdown/syntax - -with a few exceptions and extensions, detailed below. This may also -be referred to as the **FreeType Flavored Markdown**. - - -Headers -------- - -Markdown headers should not be used directly, because these are added -based on section titles, sub-section names, and tags. However, if a -header needs to be added, note the following correspondence to HTML tags: - -* Section title on top of the page is `H1`. -* Sub-section titles are `H2`. -* Parts of sub-sections are `H4`. -* Any header added will be visible in the Table of Contents (TOC) of - the page. - - -Emphasis --------- - -* Use `_underscores_` for italics. -* Use `**double asterisks**` for bold. - -Although the other notations (double underscore for bold, single -asterisk for italics) are supported, it is recommended to use the -above for consistency. - -Note that there may be cases where having two asterisks or underscores -in a line may lead to text being picked up as italics or bold. -Although unintentional, this is correct markdown behavior. - -For inline code, wrap the sequence with backticks (see below). This -renders symbols correctly without modifications. If a symbol is -absolutely required outside of an inline code block or code sequence, -escape it with a backslash (like `\*` or `\_`). - - -Lists ------ - -Unordered lists can be created with asterisks: - - * Unordered list items can use asterisks. - * Another list item. - -Ordered lists start with numbers: - - 1. This is an ordered list item. - 2. Brackets after numbers won't work. - -To continue a list over multiple paragraphs, indent them with at least -four spaces. For example: - - 1. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. - Aliquam hendrerit mi posuere lectus. Vestibulum enim wisi, - viverra nec, fringilla in, laoreet vitae, risus. - - Donec sit amet nisl. Aliquam semper ipsum sit amet velit. - Suspendisse id sem consectetuer libero luctus adipiscing. - - 2. This is the second list item. - - This paragraph is not a part of the list. - -More information on lists in markdown is available at - - https://daringfireball.net/projects/markdown/syntax#list - - -Cross-references ----------------- - -Other sub-sections can be linked with the `@` symbol: - - @description: - While FreeType's CFF driver doesn't expose API functions by - itself, it is possible to control its behaviour with - @FT_Property_Set and @FT_Property_Get. - -If a field in the `values` table of another sub-section is linked, the -link leads to its parent sub-section. - - -Links and Images ----------------- - -All URLs are converted to links in the HTML documentation. - -Markdown syntax for links and images are fully supported. - - -Inline Code ------------ - -To indicate a span of code, wrap it with backtick quotes (`` ` ``): - - Use the `printf()` function. - -Cross-references, markdown, and html styling do not work in inline code -sequences. - - -Code and Syntax Highlighting ----------------------------- - -Blocks of code are fenced by lines with three back-ticks `` ``` `` -followed by the language name, if any (used for syntax highlighting), -as demonstrated in the following example. - - ```c - x = y + z; - if ( zookoo == 2 ) - { - foobar(); - } - ``` - -Note that the indentation of the opening line and the closing line -must be exactly the same. The code sequence itself should have a -larger indentation than the surrounding back-ticks. - -Like inline code, markdown and html styling is *not* supported inside -code blocks. - - -Tables ------- - -Tables are used to list values, input, and other fields. The FreeType -Flavored Markdown adopts a simple approach to tables with two columns, -or field definition tables. - -Field definition names may contain alphanumeric, underscore, and the -`.` characters. This is followed by `::`. The following lines are -the second column of the table. A field definition ends with the -start of another field definition, or a markup tag. - - @Input: - pathname :: - A path to the font file. - - face_index :: - See @FT_Open_Face for a detailed description of this - parameter. - - -Non-breaking Space ------------------- - -A tilde can be used to create a non-breaking space. The example - - The encoding value~0 is reserved. - -is converted to - - The encoding value 0 is reserved. - - ----------------------------------------------------------------------- - -Copyright (C) 2018-2019 by -Nikhil Ramakrishnan, David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of DOCGUIDE --- diff --git a/ThirdParty/freetype/docs/FTL.TXT b/ThirdParty/freetype/docs/FTL.TXT deleted file mode 100644 index c406d15..0000000 --- a/ThirdParty/freetype/docs/FTL.TXT +++ /dev/null @@ -1,169 +0,0 @@ - The FreeType Project LICENSE - ---------------------------- - - 2006-Jan-27 - - Copyright 1996-2002, 2006 by - David Turner, Robert Wilhelm, and Werner Lemberg - - - -Introduction -============ - - The FreeType Project is distributed in several archive packages; - some of them may contain, in addition to the FreeType font engine, - various tools and contributions which rely on, or relate to, the - FreeType Project. - - This license applies to all files found in such packages, and - which do not fall under their own explicit license. The license - affects thus the FreeType font engine, the test programs, - documentation and makefiles, at the very least. - - This license was inspired by the BSD, Artistic, and IJG - (Independent JPEG Group) licenses, which all encourage inclusion - and use of free software in commercial and freeware products - alike. As a consequence, its main points are that: - - o We don't promise that this software works. However, we will be - interested in any kind of bug reports. (`as is' distribution) - - o You can use this software for whatever you want, in parts or - full form, without having to pay us. (`royalty-free' usage) - - o You may not pretend that you wrote this software. If you use - it, or only parts of it, in a program, you must acknowledge - somewhere in your documentation that you have used the - FreeType code. (`credits') - - We specifically permit and encourage the inclusion of this - software, with or without modifications, in commercial products. - We disclaim all warranties covering The FreeType Project and - assume no liability related to The FreeType Project. - - - Finally, many people asked us for a preferred form for a - credit/disclaimer to use in compliance with this license. We thus - encourage you to use the following text: - - """ - Portions of this software are copyright © The FreeType - Project (www.freetype.org). All rights reserved. - """ - - Please replace with the value from the FreeType version you - actually use. - - -Legal Terms -=========== - -0. Definitions --------------- - - Throughout this license, the terms `package', `FreeType Project', - and `FreeType archive' refer to the set of files originally - distributed by the authors (David Turner, Robert Wilhelm, and - Werner Lemberg) as the `FreeType Project', be they named as alpha, - beta or final release. - - `You' refers to the licensee, or person using the project, where - `using' is a generic term including compiling the project's source - code as well as linking it to form a `program' or `executable'. - This program is referred to as `a program using the FreeType - engine'. - - This license applies to all files distributed in the original - FreeType Project, including all source code, binaries and - documentation, unless otherwise stated in the file in its - original, unmodified form as distributed in the original archive. - If you are unsure whether or not a particular file is covered by - this license, you must contact us to verify this. - - The FreeType Project is copyright (C) 1996-2000 by David Turner, - Robert Wilhelm, and Werner Lemberg. All rights reserved except as - specified below. - -1. No Warranty --------------- - - THE FREETYPE PROJECT IS PROVIDED `AS IS' WITHOUT WARRANTY OF ANY - KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, - WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - PURPOSE. IN NO EVENT WILL ANY OF THE AUTHORS OR COPYRIGHT HOLDERS - BE LIABLE FOR ANY DAMAGES CAUSED BY THE USE OR THE INABILITY TO - USE, OF THE FREETYPE PROJECT. - -2. Redistribution ------------------ - - This license grants a worldwide, royalty-free, perpetual and - irrevocable right and license to use, execute, perform, compile, - display, copy, create derivative works of, distribute and - sublicense the FreeType Project (in both source and object code - forms) and derivative works thereof for any purpose; and to - authorize others to exercise some or all of the rights granted - herein, subject to the following conditions: - - o Redistribution of source code must retain this license file - (`FTL.TXT') unaltered; any additions, deletions or changes to - the original files must be clearly indicated in accompanying - documentation. The copyright notices of the unaltered, - original files must be preserved in all copies of source - files. - - o Redistribution in binary form must provide a disclaimer that - states that the software is based in part of the work of the - FreeType Team, in the distribution documentation. We also - encourage you to put an URL to the FreeType web page in your - documentation, though this isn't mandatory. - - These conditions apply to any software derived from or based on - the FreeType Project, not just the unmodified files. If you use - our work, you must acknowledge us. However, no fee need be paid - to us. - -3. Advertising --------------- - - Neither the FreeType authors and contributors nor you shall use - the name of the other for commercial, advertising, or promotional - purposes without specific prior written permission. - - We suggest, but do not require, that you use one or more of the - following phrases to refer to this software in your documentation - or advertising materials: `FreeType Project', `FreeType Engine', - `FreeType library', or `FreeType Distribution'. - - As you have not signed this license, you are not required to - accept it. However, as the FreeType Project is copyrighted - material, only this license, or another one contracted with the - authors, grants you the right to use, distribute, and modify it. - Therefore, by using, distributing, or modifying the FreeType - Project, you indicate that you understand and accept all the terms - of this license. - -4. Contacts ------------ - - There are two mailing lists related to FreeType: - - o freetype@nongnu.org - - Discusses general use and applications of FreeType, as well as - future and wanted additions to the library and distribution. - If you are looking for support, start in this list if you - haven't found anything to help you in the documentation. - - o freetype-devel@nongnu.org - - Discusses bugs, as well as engine internals, design issues, - specific licenses, porting, etc. - - Our home page can be found at - - https://www.freetype.org - - ---- end of FTL.TXT --- diff --git a/ThirdParty/freetype/docs/GPLv2.TXT b/ThirdParty/freetype/docs/GPLv2.TXT deleted file mode 100644 index b2fe7b6..0000000 --- a/ThirdParty/freetype/docs/GPLv2.TXT +++ /dev/null @@ -1,340 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 2, June 1991 - - Copyright (C) 1989, 1991 Free Software Foundation, Inc. - 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The licenses for most software are designed to take away your -freedom to share and change it. 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It is safest -to attach them to the start of each source file to most effectively -convey the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - - Copyright (C) - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - -Also add information on how to contact you by electronic and paper mail. - -If the program is interactive, make it output a short notice like this -when it starts in an interactive mode: - - Gnomovision version 69, Copyright (C) year name of author - Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, the commands you use may -be called something other than `show w' and `show c'; they could even be -mouse-clicks or menu items--whatever suits your program. - -You should also get your employer (if you work as a programmer) or your -school, if any, to sign a "copyright disclaimer" for the program, if -necessary. Here is a sample; alter the names: - - Yoyodyne, Inc., hereby disclaims all copyright interest in the program - `Gnomovision' (which makes passes at compilers) written by James Hacker. - - , 1 April 1989 - Ty Coon, President of Vice - -This General Public License does not permit incorporating your program into -proprietary programs. If your program is a subroutine library, you may -consider it more useful to permit linking proprietary applications with the -library. If this is what you want to do, use the GNU Library General -Public License instead of this License. diff --git a/ThirdParty/freetype/docs/INSTALL b/ThirdParty/freetype/docs/INSTALL deleted file mode 100644 index 6105025..0000000 --- a/ThirdParty/freetype/docs/INSTALL +++ /dev/null @@ -1,90 +0,0 @@ - -There are several ways to build the FreeType library, depending on -your system and the level of customization you need. Here is a short -overview of the documentation available: - - -I. Normal installation and upgrades -=================================== - - 1. Unix Systems (including Mac OS X, Cygwin, and MSys on Windows) - - Please read `INSTALL.UNIX' to install or upgrade FreeType 2 on a - Unix system. Note that you *need* GNU Make for automatic - compilation, since other make tools won't work (this includes BSD - Make). - - GNU Make VERSION 3.81 OR NEWER IS NEEDED! - - [For `cmake' see below.] - - - 2. On VMS with the `mms' build tool - - See `INSTALL.VMS' for installation instructions on this platform. - - - 3. Other systems using GNU Make - - On non-Unix platforms, it is possible to build the library using - GNU Make utility. Note that *NO OTHER MAKE TOOL WILL WORK*[1]! - This methods supports several compilers on Windows, OS/2, and - BeOS, including MinGW, Visual C++, Borland C++, and more. - - Instructions are provided in the file `INSTALL.GNU'. - - - 4. With an IDE Project File (e.g., for Visual Studio or CodeWarrior) - - We provide a small number of `project files' for various IDEs to - automatically build the library as well. Note that these files - are not supported and only sporadically maintained by FreeType - developers, so don't expect them to work in each release. - - To find them, have a look at the content of the `builds/' - directory, where stands for your OS or environment. - - - 5. Using cmake - - See the top-level `CMakeLists.txt' file for more information. - - - 6. From you own IDE, or own Makefiles - - If you want to create your own project file, follow the - instructions given in the `INSTALL.ANY' document of this - directory. - - -II. Custom builds of the library -================================ - - Customizing the compilation of FreeType is easy, and allows you to - select only the components of the font engine that you really need. - For more details read the file `CUSTOMIZE'. - - ----------------------------------------------------------------------- - -[1] make++, a make tool written in Perl, has sufficient support of GNU - make extensions to build FreeType. See - - https://makepp.sourceforge.net - - for more information; you need version 2.0 or newer, and you must - pass option `--norc-substitution'. - ----------------------------------------------------------------------- - -Copyright (C) 2000-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of INSTALL --- diff --git a/ThirdParty/freetype/docs/INSTALL.ANY b/ThirdParty/freetype/docs/INSTALL.ANY deleted file mode 100644 index 4d5fd8d..0000000 --- a/ThirdParty/freetype/docs/INSTALL.ANY +++ /dev/null @@ -1,154 +0,0 @@ -Instructions on how to build FreeType with your own build tool -============================================================== - -See the file `CUSTOMIZE' to learn how to customize FreeType to -specific environments. - - -I. Standard procedure ---------------------- - - * DISABLE PRE-COMPILED HEADERS! This is very important for Visual - C++, because FreeType uses lines like: - - #include FT_FREETYPE_H - - which are not correctly supported by this compiler while being ISO - C compliant! - - * You need to add the directory `include' to your include path when - compiling the library. - - * FreeType 2 is made of several components; each of them is located - in a subdirectory of `freetype2/src'. For example, - `freetype2/src/truetype/' contains the TrueType font driver. - - * DO NOT COMPILE ALL C FILES! Rather, compile the following ones. - - -- base components (required) - - src/base/ftsystem.c - src/base/ftinit.c - src/base/ftdebug.c - - src/base/ftbase.c - - src/base/ftbbox.c -- recommended, see - src/base/ftglyph.c -- recommended, see - - src/base/ftbdf.c -- optional, see - src/base/ftbitmap.c -- optional, see - src/base/ftcid.c -- optional, see - src/base/ftfstype.c -- optional - src/base/ftgasp.c -- optional, see - src/base/ftgxval.c -- optional, see - src/base/ftmm.c -- optional, see - src/base/ftotval.c -- optional, see - src/base/ftpatent.c -- optional - src/base/ftpfr.c -- optional, see - src/base/ftstroke.c -- optional, see - src/base/ftsynth.c -- optional, see - src/base/fttype1.c -- optional, see - src/base/ftwinfnt.c -- optional, see - - src/base/ftmac.c -- only on the Macintosh - - -- font drivers (optional; at least one is needed) - - src/bdf/bdf.c -- BDF font driver - src/cff/cff.c -- CFF/OpenType font driver - src/cid/type1cid.c -- Type 1 CID-keyed font driver - src/pcf/pcf.c -- PCF font driver - src/pfr/pfr.c -- PFR/TrueDoc font driver - src/sfnt/sfnt.c -- SFNT files support - (TrueType & OpenType) - src/truetype/truetype.c -- TrueType font driver - src/type1/type1.c -- Type 1 font driver - src/type42/type42.c -- Type 42 font driver - src/winfonts/winfnt.c -- Windows FONT / FNT font driver - - -- rasterizers (optional; at least one is needed for vector - formats) - - src/raster/raster.c -- monochrome rasterizer - src/smooth/smooth.c -- anti-aliasing rasterizer - - -- auxiliary modules (optional) - - src/autofit/autofit.c -- auto hinting module - src/cache/ftcache.c -- cache sub-system (in beta) - src/gzip/ftgzip.c -- support for compressed fonts (.gz) - src/lzw/ftlzw.c -- support for compressed fonts (.Z) - src/bzip2/ftbzip2.c -- support for compressed fonts (.bz2) - src/gxvalid/gxvalid.c -- TrueTypeGX/AAT table validation - src/otvalid/otvalid.c -- OpenType table validation - src/psaux/psaux.c -- PostScript Type 1 parsing - src/pshinter/pshinter.c -- PS hinting module - src/psnames/psnames.c -- PostScript glyph names support - - - Notes: - - `ftcache.c' needs `ftglyph.c' - `ftfstype.c' needs `fttype1.c' - `ftglyph.c' needs `ftbitmap.c' - `ftstroke.c' needs `ftglyph.c' - `ftsynth.c' needs `ftbitmap.c' - - `cff.c' needs `sfnt.c', `pshinter.c', and `psnames.c' - `truetype.c' needs `sfnt.c' and `psnames.c' - `type1.c' needs `psaux.c' `pshinter.c', and `psnames.c' - `type1cid.c' needs `psaux.c', `pshinter.c', and `psnames.c' - `type42.c' needs `truetype.c' - - Please consult the central `include/freetype/config/ftoption.h' - configuration file for details on additional libraries necessary - for some optional features. - - - Read the file `CUSTOMIZE' in case you want to compile only a subset - of the drivers, renderers, and optional modules; a detailed - description of the various base extension is given in the top-level - file `modules.cfg'. - - You are done. In case of problems, see the archives of the FreeType - development mailing list. - - -II. Support for flat-directory compilation ------------------------------------------- - - It is possible to put all FreeType 2 source files into a single - directory, with the *exception* of the `include' hierarchy. - - 1. Copy all files in current directory - - cp freetype2/src/base/*.[hc] . - cp freetype2/src/raster1/*.[hc] . - cp freetype2/src/smooth/*.[hc] . - etc. - - 2. Compile sources - - cc -c -Iinclude -DFT2_BUILD_LIBRARY ftsystem.c - cc -c -Iinclude -DFT2_BUILD_LIBRARY ftinit.c - cc -c -Iinclude -DFT2_BUILD_LIBRARY ftdebug.c - cc -c -Iinclude -DFT2_BUILD_LIBRARY ftbase.c - etc. - - You don't need to define the FT_FLAT_COMPILATION macro (as this - was required in previous releases of FreeType 2). - ----------------------------------------------------------------------- - -Copyright (C) 2003-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of INSTALL.ANY --- diff --git a/ThirdParty/freetype/docs/INSTALL.CROSS b/ThirdParty/freetype/docs/INSTALL.CROSS deleted file mode 100644 index 8f4cf6e..0000000 --- a/ThirdParty/freetype/docs/INSTALL.CROSS +++ /dev/null @@ -1,177 +0,0 @@ -This document contains instructions on how to cross-build the FreeType -library on Unix systems, for example, building binaries for Linux/MIPS -on FreeBSD/i386. Before reading this document, please consult the -file `INSTALL.UNIX' for required tools and the basic self-building -procedure. - - - 1. Required Tools - ----------------- - - For self-building the FreeType library on a Unix system, GNU Make - 3.81 or newer is required. `INSTALL.UNIX' contains hints how to - check the installed `make'. - - The GNU C compiler to cross-build the target system is required. - Currently, using a non-GNU cross compiler is untested. The cross - compiler is expected to be installed with a system prefix. For - example, if your building system is FreeBSD/i386 and the target - system is Linux/MIPS, the cross compiler should be installed with - the name `mips-ip22-linuxelf-gcc'. - - A C compiler for a self-build is required also, to build a tool - (`apinames') that is executed during the build procedure. Non-GNU - self compilers are acceptable, but such a setup is untested. - - - 2. Configuration - ---------------- - - 2.1. Building and target system - - To configure a cross-build, the options `--host=' and - `--build=' must be passed to the `configure' script. - For example, if your build system is FreeBSD/i386 and the target - system is Linux/MIPS, say - - ./configure \ - --build=i386-unknown-freebsd \ - --host=mips-ip22-linuxelf \ - [other options] - - It should be noted that `--host=' specifies the system - where the built binaries will be executed, not the system where - the build actually happens. Older versions of GNU autoconf use - the option pair `--host=' and `--target='. This is broken and - doesn't work. Similarly, an explicit CC specification like - - env CC=mips-ip22-linux-gcc ./configure # BAD - - or - - env CC=/usr/local/mips-ip22-linux/bin/gcc ./configure # BAD - - doesn't work either; such a configuration confuses the - `configure' script while trying to find the cross and native C - compilers. - - - 2.2. The prefix to install FreeType2 - - Setting `--prefix=' properly is important. The prefix - to install FreeType2 is written into the `freetype-config' - script and `freetype2.pc' configuration file. - - If the built FreeType 2 library is used as a part of the - cross-building system, the prefix is expected to be different - from the self-building system. For example, a configuration - with `--prefix=/usr/local' installs binaries into the - system-wide `/usr/local' directory, which then can't be executed - due to the incorrect architecture. This causes confusion in - configuration of all applications that use FreeType2. Instead, - use a prefix to install the cross-build into a separate system - tree, for example, `--prefix=/usr/local/mips-ip22-linux/'. - - On the other hand, if the built FreeType 2 library is used as a - part of the target system, the prefix to install should reflect - the file system structure of the target system. - - - 2.3. Library dependencies - - FreeType normally depends on external libraries like `libpng' or - `libharfbuzz'. The easiest case is to deactivate all such - dependencies using the `--without-XXX' configuration options. - However, if you want to use those libraries, you should ensure - that they are available both on the target system and as - (cross-compiled) libraries on the build system. - - FreeType uses `pkg-config' to find most of the libraries; the - other libraries it links to are expected in the standard system - directories. Since the default pkg-config's meta-information - files (like `harfbuzz.pc') of the build platform don't work, use - one of the two possible solutions below. - - o Use pkg-config's meta-information files that are adjusted to - cross-compile and cross-link with the target platform's - libraries. Make sure those files are found before the build - system's default files. Example: - - ./configure \ - --build=i386-unknown-freebsd \ - --host=mips-ip22-linuxelf \ - PKG_CONFIG_LIBDIR="/usr/local/mips-ip22-linux/lib/pkgconfig" \ - [other options] - - See the manpage of `pkg-config' for more details. - - o Set variables like LIBPNG_LIBS as additional options to the - `configure' script, overriding the values `pkg-config' would - provide. `configure --help' shows the available environment - variables. Example: - - ./configure \ - --build=i386-unknown-freebsd \ - --host=mips-ip22-linuxelf \ - LIBPNG_CFLAGS="-I/usr/local/mips-ip22-linux/include" \ - LIBPNG_LIBS="-L/usr/local/mips-ip22-linux/lib -lpng12" \ - [other options] - - - 3. Building command - ------------------- - - If the configuration finishes successfully, invoking GNU make - builds FreeType2. Just say - - make - - or - - gmake - - depending on the name the GNU make binary actually has. - - - 4. Installation - --------------- - - Saying - - make install - - as usual to install FreeType2 into the directory tree specified by - the argument of the `--prefix' option. - - As noted in section 2.2, FreeType2 is sometimes configured to be - installed into the system directory of the target system, and - should not be installed in the cross-building system. In such - cases, the make variable `DESTDIR' is useful to change the root - directory in the installation. For example, after - - make DESTDIR=/mnt/target_system_root/ install - - the built FreeType2 library files are installed into the directory - `/mnt/target_system_root//lib'. - - - 5. TODO - ------- - - Cross building between Cygwin (or MSys) and Unix must be tested. - - ----------------------------------------------------------------------- - -Copyright (C) 2006-2019 by -suzuki toshiya, David Turner, Robert Wilhelm, and Werner Lemberg. - - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of INSTALL.CROSS --- diff --git a/ThirdParty/freetype/docs/INSTALL.GNU b/ThirdParty/freetype/docs/INSTALL.GNU deleted file mode 100644 index 6f37a0f..0000000 --- a/ThirdParty/freetype/docs/INSTALL.GNU +++ /dev/null @@ -1,161 +0,0 @@ -This document contains instructions how to build the FreeType library -on non-Unix systems with the help of GNU Make. Note that if you are -running Cygwin or MinGW/MSYS in Windows, you should follow the -instructions in the file `INSTALL.UNIX' instead. - - - FreeType 2 includes a powerful and flexible build system that allows - you to easily compile it on a great variety of platforms from the - command line. To do so, just follow these simple instructions. - - 1. Install GNU Make - ------------------- - - Because GNU Make is the only Make tool supported to compile - FreeType 2, you should install it on your machine. - - The FreeType 2 build system relies on many features special to GNU - Make. - - NEARLY ALL OTHER MAKE TOOLS FAIL, INCLUDING `BSD MAKE', SO REALLY - INSTALL A RECENT VERSION OF GNU MAKE ON YOUR SYSTEM! - - Note that make++, a make tool written in Perl, supports enough - features of GNU make to compile FreeType. See - - https://makepp.sourceforge.net - - for more information; you need version 2.0 or newer, and you must - pass option `--norc-substitution'. - - Make sure that you are invoking GNU Make from the command line, by - typing something like: - - make -v - - to display its version number. - - VERSION 3.81 OR NEWER IS NEEDED! - - - 2. Invoke `make' - ---------------- - - Go to the root directory of FreeType 2, then simply invoke GNU - Make from the command line. This will launch the FreeType 2 host - platform detection routines. A summary will be displayed, for - example, on Win32. - - - ============================================================== - FreeType build system -- automatic system detection - - The following settings are used: - - platform windows - compiler gcc - configuration directory .\builds\windows - configuration rules .\builds\windows\w32-gcc.mk - - If this does not correspond to your system or settings please - remove the file 'config.mk' from this directory then read the - INSTALL file for help. - - Otherwise, simply type 'make' again to build the library - or 'make refdoc' to build the API reference (the latter needs - python). - ============================================================= - - - If the detected settings correspond to your platform and compiler, - skip to step 5. Note that if your platform is completely alien to - the build system, the detected platform will be `ansi'. - - - 3. Configure the build system for a different compiler - ------------------------------------------------------ - - If the build system correctly detected your platform, but you want - to use a different compiler than the one specified in the summary - (for most platforms, gcc is the default compiler), invoke GNU Make - with - - make setup - - Examples: - - to use Visual C++ on Win32, type: `make setup visualc' - to use Borland C++ on Win32, type `make setup bcc32' - to use Watcom C++ on Win32, type `make setup watcom' - to use Intel C++ on Win32, type `make setup intelc' - to use LCC-Win32 on Win32, type: `make setup lcc' - to use Watcom C++ on OS/2, type `make setup watcom' - to use VisualAge C++ on OS/2, type `make setup visualage' - - The name to use is platform-dependent. The list of - available compilers for your system is available in the file - `builds//detect.mk'. - - If you are satisfied by the new configuration summary, skip to - step 5. - - - 4. Configure the build system for an unknown platform/compiler - -------------------------------------------------------------- - - The auto-detection/setup phase of the build system copies a file - to the current directory under the name `config.mk'. - - For example, on OS/2+gcc, it would simply copy - `builds/os2/os2-gcc.mk' to `./config.mk'. - - If for some reason your platform isn't correctly detected, copy - manually the configuration sub-makefile to `./config.mk' and go to - step 5. - - Note that this file is a sub-Makefile used to specify Make - variables for compiler and linker invocation during the build. - You can easily create your own version from one of the existing - configuration files, then copy it to the current directory under - the name `./config.mk'. - - - 5. Build the library - -------------------- - - The auto-detection/setup phase should have copied a file in the - current directory, called `./config.mk'. This file contains - definitions of various Make variables used to invoke the compiler - and linker during the build. [It has also generated a file called - `ftmodule.h' in the objects directory (which is normally - `/objs/'); please read the file `docs/CUSTOMIZE' for - customization of FreeType.] - - To launch the build, simply invoke GNU Make again: The top - Makefile will detect the configuration file and run the build with - it. - - - Final note - - The above instructions build a _statically_ linked library of the - font engine in the `objs' directory. On Windows, you can build a - DLL either with MinGW (within an MSYS shell, following the - instructions in `INSTALL.UNIX'), or you use one of the Visual C++ - project files; see the subdirectories of `builds/windows'. For - everything else, you are on your own, and you might follow the - instructions in `INSTALL.ANY' to create your own Makefiles. - ----------------------------------------------------------------------- - -Copyright (C) 2003-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of INSTALL.GNU --- diff --git a/ThirdParty/freetype/docs/INSTALL.MAC b/ThirdParty/freetype/docs/INSTALL.MAC deleted file mode 100644 index 2587e24..0000000 --- a/ThirdParty/freetype/docs/INSTALL.MAC +++ /dev/null @@ -1,32 +0,0 @@ -Please follow the instructions in INSTALL.UNIX to install FreeType on -Mac OS X. - -Currently FreeType2 functions based on some deprecated Carbon APIs -return `FT_Err_Unimplemented_Feature' always, even if FreeType2 is -configured and built on the system that deprecated Carbon APIs are -available. To enable deprecated FreeType2 functions as far as -possible, replace `src/base/ftmac.c' by `builds/mac/ftmac.c'. - -Starting with Mac OS X 10.5, gcc defaults the deployment target to -10.5. In previous versions of Mac OS X, this defaulted to 10.1. If -you want your built binaries to run only on 10.5, this change does not -concern you. If you want them to also run on older versions of Mac -OS X, then you must either set the MACOSX_DEPLOYMENT_TARGET -environment variable or pass `-mmacosx-version-min' to gcc. You -should specify the oldest version of Mac OS you want the code to run -on. For example, if you use Bourne shell: - - export MACOSX_DEPLOYMENT_TARGET=10.2 - -or, if you use C shell: - - setenv MACOSX_DEPLOYMENT_TARGET 10.2 - -Alternatively, you could pass `-mmacosx-version-min=10.2' to gcc. - -Here the number 10.2 is the lowest version that the built binaries can -run on. In the above cases, the built binaries will run on Mac OS X -10.2 and later, but _not_ earlier. If you want to run on earlier, you -have to set lower version, e.g., 10.0. - -For classic Mac OS (Mac OS 7, 8, 9) please refer to builds/mac/README. diff --git a/ThirdParty/freetype/docs/INSTALL.UNIX b/ThirdParty/freetype/docs/INSTALL.UNIX deleted file mode 100644 index 602744d..0000000 --- a/ThirdParty/freetype/docs/INSTALL.UNIX +++ /dev/null @@ -1,118 +0,0 @@ -This document contains instructions on how to build the FreeType -library on Unix systems. This also works for emulations like Cygwin -or MSys on Win32: - - - 1. Ensure that you are using GNU Make - ------------------------------------- - - The FreeType build system _exclusively_ works with GNU Make. You - will not be able to compile the library with the instructions - below using any other alternative (including BSD Make). - - Check that you have GNU make by running the command: - - make -v - - This should dump some text that begins with: - - GNU Make - Copyright (C) Free Software Foundation Inc. - - Note that version 3.81 or higher is *required* or the build will - fail. - - It is also fine to have GNU Make under another name (e.g. 'gmake') - if you use the MAKE variable as described below. - - As a special exception, 'makepp' can also be used to build - FreeType 2. See the file docs/MAKEPP for details. - - For builds with `cmake' please check file `CMakeLists.txt'; this - is a contributed file not directly supported by the FreeType team. - - - 2. Regenerate the configure script if needed - -------------------------------------------- - - This only applies if you are building a git snapshot or checkout, - *not* if you grabbed the sources of an official release. - - You need to invoke the `autogen.sh' script in the top-level - directory in order to create the `configure' script for your - platform. Normally, this simply means typing: - - sh autogen.sh - - In case of problems, you may need to install or upgrade Automake, - Autoconf or Libtool. See README.git in the top-level directory - for more information. - - - 3. Build and install the library - -------------------------------- - - The following should work on all Unix systems where the `make' - command invokes GNU Make: - - ./configure [options] - make - make install (as root) - - The default installation path is `/usr/local'. It can be changed - with the `--prefix=' option. Example: - - ./configure --prefix=/usr - - When using a different command to invoke GNU Make, use the MAKE - variable. For example, if `gmake' is the command to use on your - system, do something like: - - MAKE=gmake ./configure [options] - gmake - gmake install (as root) - - If this still doesn't work, there must be a problem with your - system (e.g., you are using a very old version of GNU Make). - - It is possible to compile FreeType in a different directory. - Assuming the FreeType source files in directory `/src/freetype' a - compilation in directory `foo' works as follows: - - cd foo - /src/freetype/configure [options] - make - make install - - - 3.1 Interdependency with HarfBuzz - ................................. - - Note that there is a chicken-and-egg problem currently since the - HarfBuzz library (used by the auto-hinter to improve support of - OpenType fonts) depends on FreeType, which can be solved as - follows in case HarfBuzz is not yet installed on your system. - - 1. Call FreeType's `configure' script with option - `--without-harfbuzz', then compile and install FreeType. - - 2. Compile and install HarfBuzz. - - 3. Call FreeType's `configure' script without option - `--without-harfbuzz' (after executing `make distclean'), then - compile and install FreeType again. - - ----------------------------------------------------------------------- - -Copyright (C) 2003-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of INSTALL.UNIX --- diff --git a/ThirdParty/freetype/docs/INSTALL.VMS b/ThirdParty/freetype/docs/INSTALL.VMS deleted file mode 100644 index 54fa2f8..0000000 --- a/ThirdParty/freetype/docs/INSTALL.VMS +++ /dev/null @@ -1,62 +0,0 @@ -How to build the FreeType 2 library on VMS ------------------------------------------ - -It is actually very straightforward to install the FreeType 2 library. -Just execute vms_make.com from the toplevel directory to build the -library. This procedure currently accepts the following options: - -DEBUG - Build the library with debug information and without optimization. - -lopts= - Options to pass to the link command e.g. lopts=/traceback - -ccopt= - Options to pass to the C compiler e.g. ccopt=/float=ieee - -In case you did download the demos, place them in a separate directory -sharing the same top level as the directory of FreeType 2 and follow -the same instructions as above for the demos from there. The build -process relies on this to figure out the location of the FreeType 2 -include files. - - -To rebuild the sources it is necessary to have MMS/MMK installed on -the system. - -The library is available in the directory - - [.LIB] - -To compile applications using FreeType 2 you have to define the -logical FREETYPE pointing to the directory - - [.INCLUDE.FREETYPE] - -i.e., if the directory in which this INSTALL.VMS file is located is -$disk:[freetype] then define the logical with - - define freetype $disk:[freetype.include.freetype] - -This version has been tested with Compaq C V6.2-006 on OpenVMS Alpha -V7.2-1. - - - Any problems can be reported to - - Jouk Jansen or - Martin P.J. Zinser - ------------------------------------------------------------------------- - -Copyright (C) 2000-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - ---- end of INSTALL.VMS --- diff --git a/ThirdParty/freetype/docs/LICENSE.TXT b/ThirdParty/freetype/docs/LICENSE.TXT deleted file mode 100644 index af5a1c5..0000000 --- a/ThirdParty/freetype/docs/LICENSE.TXT +++ /dev/null @@ -1,39 +0,0 @@ - -The FreeType 2 font engine is copyrighted work and cannot be used -legally without a software license. In order to make this project -usable to a vast majority of developers, we distribute it under two -mutually exclusive open-source licenses. - -This means that *you* must choose *one* of the two licenses described -below, then obey all its terms and conditions when using FreeType 2 in -any of your projects or products. - - - The FreeType License, found in the file `FTL.TXT', which is similar - to the original BSD license *with* an advertising clause that forces - you to explicitly cite the FreeType project in your product's - documentation. All details are in the license file. This license - is suited to products which don't use the GNU General Public - License. - - Note that this license is compatible to the GNU General Public - License version 3, but not version 2. - - - The GNU General Public License version 2, found in `GPLv2.TXT' (any - later version can be used also), for programs which already use the - GPL. Note that the FTL is incompatible with GPLv2 due to its - advertisement clause. - -The contributed BDF and PCF drivers come with a license similar to that -of the X Window System. It is compatible to the above two licenses (see -file src/bdf/README and src/pcf/README). The same holds for the files -`fthash.c' and `fthash.h'; their code was part of the BDF driver in -earlier FreeType versions. - -The gzip module uses the zlib license (see src/gzip/zlib.h) which too is -compatible to the above two licenses. - -The MD5 checksum support (only used for debugging in development builds) -is in the public domain. - - ---- end of LICENSE.TXT --- diff --git a/ThirdParty/freetype/docs/MAKEPP b/ThirdParty/freetype/docs/MAKEPP deleted file mode 100644 index 4450e47..0000000 --- a/ThirdParty/freetype/docs/MAKEPP +++ /dev/null @@ -1,5 +0,0 @@ -As a special exception, FreeType can also be built with the 'makepp' -build tool, available from https://makepp.sourceforge.net. - -Note, however, that you will need at least version 2.0 and pass the -option --norc-substitution to have it work correctly. diff --git a/ThirdParty/freetype/docs/PROBLEMS b/ThirdParty/freetype/docs/PROBLEMS deleted file mode 100644 index 40bdc35..0000000 --- a/ThirdParty/freetype/docs/PROBLEMS +++ /dev/null @@ -1,90 +0,0 @@ -This file describes various problems that have been encountered in -compiling, installing and running FreeType 2. Suggestions for -additions or other improvements to this file are welcome. - ----------------------------------------------------------------------- - -Running Problems -================ - - -* Some Type 1, Multiple Masters, and CID-keyed PostScript fonts aren't - handled correctly. - ------ - -Of course, there might be bugs in FreeType, but some fonts based on -the PostScript format can't be handled indeed. The reason is that -FreeType doesn't contain a full PostScript interpreter but applies -pattern matching instead. In case a font doesn't follow the standard -structure of the given font format, FreeType fails. A typical example -is Adobe's `Optima' font family which contains extra code to switch -between low and high resolution versions of the glyphs. - -It might be possible to patch FreeType in some situations, though. -Please report failing fonts so that we investigate the problem and set -up a list of such problematic fonts. - - -* Why do identical FreeType versions render differently on different - platforms? - ------ - -Different distributions compile FreeType with different options. The -developer version of a distribution's FreeType package, which is -needed to compile your program against FreeType, includes the file -ftoption.h. Compare each platform's copy of ftoption.h to find the -differences. - - ----------------------------------------------------------------------- - - -Compilation Problems -==================== - - -* I get an `internal compilation error' (ICE) while compiling FreeType - 2.2.1 with Intel C++. - - This has been reported for the following compiler version: - - Intel(R) C++ Compiler for 32-bit applications, - Version 9.0 Build 20050430Z Package ID: W_CC_P_9.0.019 - ------ - -The best solution is to update the compiler to version - - Intel(R) C++ Compiler for 32-bit applications, - Version 9.1 Build 20060323Z Package ID: W_CC_P_9.1.022 - -or newer. If this isn't feasible, apply the following patch. - - ---- src/cache/ftcbasic.c 20 Mar 2006 12:10:24 -0000 1.20 -+++ src/cache/ftcbasic.c.patched 15 May 2006 02:51:02 -0000 -@@ -252,7 +252,7 @@ - */ - - FT_CALLBACK_TABLE_DEF -- const FTC_IFamilyClassRec ftc_basic_image_family_class = -+ FTC_IFamilyClassRec ftc_basic_image_family_class = - { - { - sizeof ( FTC_BasicFamilyRec ), -@@ -266,7 +266,7 @@ - - - FT_CALLBACK_TABLE_DEF -- const FTC_GCacheClassRec ftc_basic_image_cache_class = -+ FTC_GCacheClassRec ftc_basic_image_cache_class = - { - { - ftc_inode_new, - - ----------------------------------------------------------------------- - ---- end of PROBLEMS --- diff --git a/ThirdParty/freetype/docs/TODO b/ThirdParty/freetype/docs/TODO deleted file mode 100644 index 1efccc6..0000000 --- a/ThirdParty/freetype/docs/TODO +++ /dev/null @@ -1,40 +0,0 @@ -Here is a list of items that need to be addressed in FreeType 2 ---------------------------------------------------------------- - -* Implement stem3/counter hints properly in the Postscript hinter. - -* Add CIDCMap support to the CID driver. - -* Add track kerning support to the PFR driver. - -* Add kerning (AFM file) support to the CID driver. - - -Here is a list of bugs which should be handled ----------------------------------------------- - -Other bugs have been registered at the savannah bugzilla of FreeType. - -* CID driver: - Handle the case where a CID font has a top-level font matrix also - (see PLRM, 5.11.3, Type 0 CIDFonts). Since CID_FaceInfoRec lacks - a font_matrix entry we have to directly apply it to all subfont - matrices. - -* CID driver: - Use top-level font matrix entry for setting the upem value, not the - entries in the FDarray. If absent, use 1000. - ------------------------------------------------------------------------- - -Copyright (C) 2001-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - ---- end of TODO --- diff --git a/ThirdParty/freetype/docs/VERSIONS.TXT b/ThirdParty/freetype/docs/VERSIONS.TXT deleted file mode 100644 index e8154bc..0000000 --- a/ThirdParty/freetype/docs/VERSIONS.TXT +++ /dev/null @@ -1,128 +0,0 @@ -Due to our use of `libtool' to generate and install the FreeType 2 -libraries on Unix systems, as well as other historical events, it is -generally very difficult to know precisely which release of the font -engine is installed on a given system. - -This file tries to explain why and to document ways to properly detect -FreeType on Unix. - - -1. Version and Release numbers ------------------------------- - -For each new public release of FreeType 2, there are generally *three* -distinct `version' numbers to consider: - - * The official FreeType 2 release number, like 2.3.1 or 2.4.10. - - * The libtool (and Unix) specific version number, like 13.0.7. This - is what `freetype-config --version' returns. - - * The platform-specific shared object number, used for example when - the library is installed as `/usr/lib/libfreetype.so.6.7.1'. - -The platform-specific number is, unsurprisingly, platform-specific and -varies with the operating system you are using (several variants of -Linux, FreeBSD, Solaris, etc.). You should thus _never_ use it, even -for simple tests. - -The libtool-specific number does not equal the release number but is -tied to it. - -The release number is available at *compile* time through the following -macros defined in FT_FREETYPE_H: - - - FREETYPE_MAJOR: major release number - - FREETYPE_MINOR: minor release number - - FREETYPE_PATCH: patch release number - -See below for a small autoconf fragment. - -The release number is also available at *runtime* through the -`FT_Library_Version' API. - - -2. History ----------- - -The following table gives, for all releases since 2.4.0, the -corresponding libtool number, as well as the shared object number found -on _most_ systems, but not all of them: - - - release libtool so - ------------------------------- - 2.10.0 23.0.17 6.17.0 - 2.9.1 22.1.16 6.16.1 - 2.9.0 22.0.16 6.16.0 - 2.8.1 21.0.15 6.15.0 - 2.8.0 20.0.14 6.14.0 - 2.7.1 19.0.13 6.13.0 - 2.7.0 18.6.12 6.12.6 - 2.6.5 18.5.12 6.12.5 - 2.6.4 18.4.12 6.12.4 - 2.6.3 18.3.12 6.12.3 - 2.6.2 18.2.12 6.12.2 - 2.6.1 18.1.12 6.12.1 - 2.6.0 18.0.12 6.12.0 - 2.5.5 17.4.11 6.11.4 - 2.5.4 17.3.11 6.11.3 - 2.5.3 17.2.11 6.11.2 - 2.5.2 17.1.11 6.11.1 - 2.5.1 17.0.11 6.11.0 - 2.5.0 16.2.10 6.10.2 - 2.4.12 16.1.10 6.10.1 - 2.4.11 16.0.10 6.10.0 - 2.4.10 15.0.9 6.9.0 - 2.4.9 14.1.8 6.8.1 - 2.4.8 14.0.8 6.8.0 - 2.4.7 13.2.7 6.7.2 - 2.4.6 13.1.7 6.7.1 - 2.4.5 13.0.7 6.7.0 - 2.4.4 12.2.6 6.6.2 - 2.4.3 12.1.6 6.6.1 - 2.4.2 12.0.6 6.6.0 - 2.4.1 11.1.5 6.5.1 - 2.4.0 11.0.5 6.5.0 - - -3. Autoconf Code Fragment -------------------------- - -Lars Clausen contributed the following autoconf fragment to detect which -version of FreeType is installed on a system. This one tests for a -version that is at least 2.0.9; you should change it to check against -other release numbers. - - - AC_MSG_CHECKING([whether FreeType version is 2.0.9 or higher]) - old_CPPFLAGS="$CPPFLAGS" - CPPFLAGS=`freetype-config --cflags` - AC_TRY_CPP([ - -#include -#include FT_FREETYPE_H -#if (FREETYPE_MAJOR*1000 + FREETYPE_MINOR)*1000 + FREETYPE_PATCH < 2000009 -#error FreeType version too low. -#endif - ], - [AC_MSG_RESULT(yes) - FREETYPE_LIBS=`freetype-config --libs` - AC_SUBST(FREETYPE_LIBS) - AC_DEFINE(HAVE_FREETYPE,1,[Define if you have the FreeType2 library]) - CPPFLAGS="$old_CPPFLAGS"], - [AC_MSG_ERROR([Need FreeType library version 2.0.9 or higher])]) - ------------------------------------------------------------------------- - -Copyright (C) 2002-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - ---- end of VERSIONS.TXT --- diff --git a/ThirdParty/freetype/docs/formats.txt b/ThirdParty/freetype/docs/formats.txt deleted file mode 100644 index 5ec5442..0000000 --- a/ThirdParty/freetype/docs/formats.txt +++ /dev/null @@ -1,208 +0,0 @@ -This file contains a list of various font formats. It gives the -reference document and whether it is supported in FreeType 2. - -Table fields ------------- - - wrapper format - The format used to represent the font data. In the table below it - is used only if the font format differs. Possible values are - - SFNT binary - PFB binary - PS a text header, followed by binary or text data - LZW compressed with either `gzip' or `compress' - BZ2 compressed with `bzip2'. - - font format - How the font is to be accessed, possibly after converting the file - type and wrapper format into a generic form. Bitmap formats are - `BDF', `PCF', and one form of `WINFNT'; all others are vector - formats. `PS' indicates third-order, `TT' second-order Bézier - curves. - - font type - Sub-formats of the font format. `SBIT' and `MACSBIT' are bitmap - formats, `MM' and `VAR' support optical axes. `CFF2' supports - optical axes also. - - glyph access - If not specified, the glyph access is `standard' to the font - format. Values are `CID' for CID-keyed fonts, `SYNTHETIC' for - fonts that are modified versions of other fonts by means of a - transformation matrix, and `TYPE_0' for PS fonts which are to be - accessed in a tree-like structure. - - FreeType driver - The module in the FreeType library which handles the specific font - format. A missing entry means that FreeType doesn't support the - font format (yet). - - -Notes ------ - - The SFNT container format also provides `collections' (usually - having the file extension `.ttc' or `.otc'). A collection contains - multiple font faces that share some tables to avoid redundancy, thus - reducing the file size. In FreeType, elements of a collection can - be accessed with a proper face index. - - Both the GX and the OpenType 1.8 variation fonts provide `named - instances'. FreeType maps them to face indices (they can also be - accessed with the standard MM interface). - - Other font formats (not using the SFNT wrapper) also provide - multiple faces within one file; they are marked with an asterisk - (`*') in the table below. - - FreeType can be configured to support Mac files (on older Mac OS - versions, a `file' is stored as a data and a resource fork, this is, - within two separate data chunks). If a file can't be opened as a - font, FreeType then checks whether it is a resource fork, trying to - extract the contained font data from either a `POST' or `sfnt' - resource. - - -Please send additions and/or corrections to wl@gnu.org or to the -FreeType developer's list at freetype-devel@nongnu.org (for -subscribers only). If you can provide a font example for a format -which isn't supported yet please send a mail too. - - - wrapper font font glyph FreeType reference - format format type access driver documents - ----------------------------------------------------------------------------- - - --- BDF --- --- bdf 5005.BDF_Spec.pdf, X11 - - - SFNT PS TYPE_1 --- type1 Type 1 GX Font Format - (for the Mac) [3] - SFNT PS TYPE_1 CID cid 5180.sfnt.pdf (for the Mac) - [3] - SFNT PS CFF --- cff OT spec, 5176.CFF.pdf - (`OTTO' format) - SFNT PS CFF CID cff OT spec, 5176.CFF.pdf - SFNT PS CFF SYNTHETIC --- OT spec, 5176.CFF.pdf - SFNT PS CFF2 --- cff OT spec 1.8 - - SFNT TT SBIT --- sfnt XFree86 (bitmaps only; - with `head' table) - SFNT TT MACSBIT --- sfnt OT spec (for the Mac; - bitmaps only; `bhed' table) - SFNT TT --- --- truetype OT spec (`normal' TT font) - SFNT TT VAR --- truetype GX spec (`?var' tables) - SFNT TT VAR --- truetype OT spec 1.8 - (`?var' + `?VAR' tables) - - - --- PS TYPE_1 --- type1 T1_SPEC.pdf - (PFA, Type 1 font resource) - PFB PS TYPE_1 --- type1 T1_SPEC.pdf, - 5040.Download_Fonts.pdf - (`normal' Type 1 font) - --- PS TYPE_1 CID cid PLRM.pdf (CID Font Type 0; - Type 9 font) - --- PS MM --- type1 5015.Type1_Supp.pdf - (Multiple Masters) - --- PS CFF --- cff 5176.CFF.pdf (`pure' CFF) - --- PS* CFF CID cff 5176.CFF.pdf (`pure' CFF) - --- PS CFF SYNTHETIC --- 5176.CFF.pdf (`pure' CFF) - --- PS CFF/MM --- cff old 5167.CFF.pdf (`pure' CFF) - [3] - --- PS* CFF/MM CID cff old 5167.CFF.pdf (`pure' CFF) - [3] - --- PS CFF/MM SYNTHETIC --- old 5167.CFF.pdf (`pure' CFF) - [3] - PS PS CFF --- --- PLRM.pdf (Type 2) [1] - PS PS* CFF CID --- PLRM.pdf (Type 2) [1] - PS PS CFF SYNTHETIC --- PLRM.pdf (Type 2) [1] - PS PS CFF/MM --- --- PLRM.pdf (Type 2) [1] - PS PS* CFF/MM CID --- PLRM.pdf (Type 2) [1] - PS PS CFF/MM SYNTHETIC --- PLRM.pdf (Type 2) [1] - --- PS --- TYPE_0 --- PLRM.pdf - --- PS TYPE_3 --- --- PLRM.pdf (never supported) - --- PS TYPE_3 CID --- PLRM.pdf (CID Font Type 1; - Type 10 font; never supported) - PS PS TYPE_14 --- --- PLRM.pdf (Chameleon font; - Type 14 font; never supported?) - --- PS TYPE_32 CID --- PLRM.pdf (CID Font Type 4; - Type 32 font; never supported?) - PS TT --- --- type42 5012.Type42_Spec.pdf - (Type 42 font) - PS TT --- CID --- PLRM.pdf (CID Font Type 2; - Type 11 font) - - - ? ? CEF ? cff ? - - - --- PCF --- --- pcf X11 [4] - LZW PCF --- --- pcf X11 [4] - BZ2 PCF --- --- pcf X11 [4] - - - --- PFR* PFR0 --- pfr [2] - --- PFR PFR1 --- --- (undocumented, proprietary; - probably never supported) - - - --- WINFNT* --- --- winfonts Windows developer's notes [5] - --- WINFNT VECTOR --- --- Windows developer's notes [5] - - -[1] Support should be rather simple since this is identical to `CFF' - but in a PS wrapper. - -[2] The official PFR specification is no longer available, but - archive.org has archived it: - - https://web.archive.org/web/20091014062300/http://www.bitstream.com/font_rendering/products/truedoc/pfrspec.html - https://web.archive.org/web/20081115152605/http://www.bitstream.com/font_rendering/pdfs/pfrspec1.3.pdf - - The syntax of the auxiliary data is not defined there, but is - partially defined in MHP 1.0.3 (also called ETSI TS 101812 V1.3.1) - section 7.4. - - https://www.etsi.org/ - https://webapp.etsi.org/workprogram/Report_WorkItem.asp?WKI_ID=18799 - -[3] Support is rudimentary currently; some tables or data are not - loaded yet. - -[4] See - - THE X WINDOW SYSTEM SERVER: X VERSION 11, RELEASE 5 - Elias Israel, Erik Fortune, Digital Press, 1992 - ISBN 1-55558-096-3 - - for a specification given in Appendix D on pgs. 436-450. However, - this information might be out of date; unfortunately, there is no - PCF specification available online, and this book is out of print. - George Williams deduced the font format from the X11 sources and - documented it for his FontForge font editor: - - https://fontforge.github.io/pcf-format.html - -[5] This is from MS Windows 3; see Microsoft's Knowledge Base article at - - https://support.microsoft.com/kb/65123 - ------------------------------------------------------------------------- - -Copyright (C) 2004-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - ---- end of formats.txt --- - -Local Variables: -coding: utf-8 -End: diff --git a/ThirdParty/freetype/docs/freetype-config.1 b/ThirdParty/freetype/docs/freetype-config.1 deleted file mode 100644 index 98d1ca1..0000000 --- a/ThirdParty/freetype/docs/freetype-config.1 +++ /dev/null @@ -1,146 +0,0 @@ -.TH FREETYPE-CONFIG 1 "March 2019" "FreeType 2.10.0" -. -. -.SH NAME -. -freetype-config \- Get information about a libfreetype installation -. -. -.SH SYNOPSIS -. -.B freetype-config -.RI [ options ] -. -. -.SH DESCRIPTION -. -.B freetype-config -returns information needed for compiling and linking programs with the -FreeType library, such as linker flags and compilation parameters. -. -Alternatively, it can be used to query information about the -FreeType library version installed on the system, such as the -installation (directory path) prefix or the FreeType version number. -. -.PP -If -.BR pkg-config (1) -is found in the path, -.B freetype-config -acts as a wrapper for -.BR pkg-config . -. -.PP -This program is part of the FreeType package. -. -. -.SH OPTIONS -. -There are two types of options: output/display selection options, and -path override options. -. -. -.SS Output selection options -. -Only one of the output selection options should be given at each program -invocation. -. -.TP -.B \-\-prefix -Return the prefix value of the installed FreeType library (the default -prefix will be `/usr' in most cases for distribution-installed -packages). -. -.TP -.B \-\-exec-prefix -Return the executable prefix value of the installed FreeType library -(will often be the same as the prefix value). -. -.TP -.B \-\-ftversion -Return the FreeType version number, directly derived from file -`freetype.h'. -. -.TP -.B \-\-version -Return the `libtool version' of the FreeType library. -. -.TP -.B \-\-libtool -Return the library name for linking with libtool. -. -.TP -.B \-\-libs -Return compiler flags for linking with the installed FreeType library. -. -.TP -.B \-\-cflags -Return compiler flags for compiling against the installed FreeType library. -. -.TP -.B \-\-static -Make command line options display flags for static linking. -. -.TP -.B \-\-help -Show help and exit. -. -. -.SS Path override options -. -These affect any selected output option, except the libtool version -returned by -.BR \-\-version . -. -.TP -.BI \-\-prefix= PREFIX -Override -.B \-\-prefix -value with -.IR PREFIX . -. -This also sets -.BI \-\-exec-prefix= PREFIX -if option -.B \-\-exec-prefix -is not explicitly given. -. -.TP -.BI \-\-exec-prefix= EPREFIX -Override -.B \-\-exec-prefix -value with -.IR EPREFIX . -. -. -.SH BUGS -In case the libraries FreeType links to are located in non-standard -directories, and -.BR pkg-config (1) -is not available, the output from option -.B \-\-libs -might be incomplete. -. -It is thus recommended to use the -.BR pkg-config (1) -interface instead, which is able to correctly resolve all dependencies. -. -.PP -Setting -.B \-\-exec-prefix -(either explicitly or implicitly) might return incorrect results if -combined with option -.BR \-\-static . -. -The same problem can occur if you set the -.B SYSROOT -environment variable. -. -. -.SH AUTHOR -. -This manual page was contributed by Nis Martensen , -with further refinements from the FreeType team. -. -. -.\" eof diff --git a/ThirdParty/freetype/docs/raster.txt b/ThirdParty/freetype/docs/raster.txt deleted file mode 100644 index 3aa3822..0000000 --- a/ThirdParty/freetype/docs/raster.txt +++ /dev/null @@ -1,635 +0,0 @@ - - How FreeType's rasterizer work - - by David Turner - - Revised 2007-Feb-01 - - -This file is an attempt to explain the internals of the FreeType -rasterizer. The rasterizer is of quite general purpose and could -easily be integrated into other programs. - - - I. Introduction - - II. Rendering Technology - 1. Requirements - 2. Profiles and Spans - a. Sweeping the Shape - b. Decomposing Outlines into Profiles - c. The Render Pool - d. Computing Profiles Extents - e. Computing Profiles Coordinates - f. Sweeping and Sorting the Spans - - -I. Introduction -=============== - - A rasterizer is a library in charge of converting a vectorial - representation of a shape into a bitmap. The FreeType rasterizer - has been originally developed to render the glyphs found in - TrueType files, made up of segments and second-order Béziers. - Meanwhile it has been extended to render third-order Bézier curves - also. This document is an explanation of its design and - implementation. - - While these explanations start from the basics, a knowledge of - common rasterization techniques is assumed. - - -II. Rendering Technology -======================== - -1. Requirements ---------------- - - We assume that all scaling, rotating, hinting, etc., has been - already done. The glyph is thus described by a list of points in - the device space. - - - All point coordinates are in the 26.6 fixed float format. The - used orientation is: - - - ^ y - | reference orientation - | - *----> x - 0 - - - `26.6' means that 26 bits are used for the integer part of a - value and 6 bits are used for the fractional part. - Consequently, the `distance' between two neighbouring pixels is - 64 `units' (1 unit = 1/64th of a pixel). - - Note that, for the rasterizer, pixel centers are located at - integer coordinates. The TrueType bytecode interpreter, - however, assumes that the lower left edge of a pixel (which is - taken to be a square with a length of 1 unit) has integer - coordinates. - - - ^ y ^ y - | | - | (1,1) | (0.5,0.5) - +-----------+ +-----+-----+ - | | | | | - | | | | | - | | | o-----+-----> x - | | | (0,0) | - | | | | - o-----------+-----> x +-----------+ - (0,0) (-0.5,-0.5) - - TrueType bytecode interpreter FreeType rasterizer - - - A pixel line in the target bitmap is called a `scanline'. - - - A glyph is usually made of several contours, also called - `outlines'. A contour is simply a closed curve that delimits an - outer or inner region of the glyph. It is described by a series - of successive points of the points table. - - Each point of the glyph has an associated flag that indicates - whether it is `on' or `off' the curve. Two successive `on' - points indicate a line segment joining the two points. - - One `off' point amidst two `on' points indicates a second-degree - (conic) Bézier parametric arc, defined by these three points - (the `off' point being the control point, and the `on' ones the - start and end points). Similarly, a third-degree (cubic) Bézier - curve is described by four points (two `off' control points - between two `on' points). - - Finally, for second-order curves only, two successive `off' - points forces the rasterizer to create, during rendering, an - `on' point amidst them, at their exact middle. This greatly - facilitates the definition of successive Bézier arcs. - - The parametric form of a second-order Bézier curve is: - - P(t) = (1-t)^2*P1 + 2*t*(1-t)*P2 + t^2*P3 - - (P1 and P3 are the end points, P2 the control point.) - - The parametric form of a third-order Bézier curve is: - - P(t) = (1-t)^3*P1 + 3*t*(1-t)^2*P2 + 3*t^2*(1-t)*P3 + t^3*P4 - - (P1 and P4 are the end points, P2 and P3 the control points.) - - For both formulae, t is a real number in the range [0..1]. - - Note that the rasterizer does not use these formulae directly. - They exhibit, however, one very useful property of Bézier arcs: - Each point of the curve is a weighted average of the control - points. - - As all weights are positive and always sum up to 1, whatever the - value of t, each arc point lies within the triangle (polygon) - defined by the arc's three (four) control points. - - In the following, only second-order curves are discussed since - rasterization of third-order curves is completely identical. - - Here some samples for second-order curves. - - - * # on curve - * off curve - __---__ - #-__ _-- -_ - --__ _- - - --__ # \ - --__ # - -# - Two `on' points - Two `on' points and one `off' point - between them - - * - # __ Two `on' points with two `off' - \ - - points between them. The point - \ / \ marked `0' is the middle of the - - 0 \ `off' points, and is a `virtual - -_ _- # on' point where the curve passes. - -- It does not appear in the point - * list. - - -2. Profiles and Spans ---------------------- - - The following is a basic explanation of the _kind_ of computations - made by the rasterizer to build a bitmap from a vector - representation. Note that the actual implementation is slightly - different, due to performance tuning and other factors. - - However, the following ideas remain in the same category, and are - more convenient to understand. - - - a. Sweeping the Shape - - The best way to fill a shape is to decompose it into a number of - simple horizontal segments, then turn them on in the target - bitmap. These segments are called `spans'. - - __---__ - _-- -_ - _- - - - \ - / \ - / \ - | \ - - __---__ Example: filling a shape - _----------_ with spans. - _-------------- - ----------------\ - /-----------------\ This is typically done from the top - / \ to the bottom of the shape, in a - | | \ movement called a `sweep'. - V - - __---__ - _----------_ - _-------------- - ----------------\ - /-----------------\ - /-------------------\ - |---------------------\ - - - In order to draw a span, the rasterizer must compute its - coordinates, which are simply the x coordinates of the shape's - contours, taken on the y scanlines. - - - /---/ |---| Note that there are usually - /---/ |---| several spans per scanline. - | /---/ |---| - | /---/_______|---| When rendering this shape to the - V /----------------| current scanline y, we must - /-----------------| compute the x values of the - a /----| |---| points a, b, c, and d. - - - - * * - - - - * * - - y - - / / b c| |d - - - /---/ |---| - /---/ |---| And then turn on the spans a-b - /---/ |---| and c-d. - /---/_______|---| - /----------------| - /-----------------| - a /----| |---| - - - - ####### - - - - ##### - - y - - / / b c| |d - - - b. Decomposing Outlines into Profiles - - For each scanline during the sweep, we need the following - information: - - o The number of spans on the current scanline, given by the - number of shape points intersecting the scanline (these are - the points a, b, c, and d in the above example). - - o The x coordinates of these points. - - x coordinates are computed before the sweep, in a phase called - `decomposition' which converts the glyph into *profiles*. - - Put it simply, a `profile' is a contour's portion that can only - be either ascending or descending, i.e., it is monotonic in the - vertical direction (we also say y-monotonic). There is no such - thing as a horizontal profile, as we shall see. - - Here are a few examples: - - - this square - 1 2 - ---->---- is made of two - | | | | - | | profiles | | - ^ v ^ + v - | | | | - | | | | - ----<---- - - up down - - - this triangle - - P2 1 2 - - |\ is made of two | \ - ^ | \ \ | \ - | | \ \ profiles | \ | - | | \ v ^ | \ | - | \ | | + \ v - | \ | | \ - P1 ---___ \ ---___ \ - ---_\ ---_ \ - <--__ P3 up down - - - - A more general contour can be made of more than two profiles: - - __ ^ - / | / ___ / | - / | / | / | / | - | | / / => | v / / - | | | | | | ^ | - ^ | |___| | | ^ + | + | + v - | | | v | | - | | | up | - |___________| | down | - - <-- up down - - - Successive profiles are always joined by horizontal segments - that are not part of the profiles themselves. - - For the rasterizer, a profile is simply an *array* that - associates one horizontal *pixel* coordinate to each bitmap - *scanline* crossed by the contour's section containing the - profile. Note that profiles are *oriented* up or down along the - glyph's original flow orientation. - - In other graphics libraries, profiles are also called `edges' or - `edgelists'. - - - c. The Render Pool - - FreeType has been designed to be able to run well on _very_ - light systems, including embedded systems with very few memory. - - A render pool will be allocated once; the rasterizer uses this - pool for all its needs by managing this memory directly in it. - The algorithms that are used for profile computation make it - possible to use the pool as a simple growing heap. This means - that this memory management is actually quite easy and faster - than any kind of malloc()/free() combination. - - Moreover, we'll see later that the rasterizer is able, when - dealing with profiles too large and numerous to lie all at once - in the render pool, to immediately decompose recursively the - rendering process into independent sub-tasks, each taking less - memory to be performed (see `sub-banding' below). - - The render pool doesn't need to be large. A 4KByte pool is - enough for nearly all renditions, though nearly 100% slower than - a more comfortable 16KByte or 32KByte pool (that was tested with - complex glyphs at sizes over 500 pixels). - - - d. Computing Profiles Extents - - Remember that a profile is an array, associating a _scanline_ to - the x pixel coordinate of its intersection with a contour. - - Though it's not exactly how the FreeType rasterizer works, it is - convenient to think that we need a profile's height before - allocating it in the pool and computing its coordinates. - - The profile's height is the number of scanlines crossed by the - y-monotonic section of a contour. We thus need to compute these - sections from the vectorial description. In order to do that, - we are obliged to compute all (local and global) y extrema of - the glyph (minima and maxima). - - - P2 For instance, this triangle has only - two y-extrema, which are simply - |\ - | \ P2.y as a vertical maximum - | \ P3.y as a vertical minimum - | \ - | \ P1.y is not a vertical extremum (though - | \ it is a horizontal minimum, which we - P1 ---___ \ don't need). - ---_\ - P3 - - - Note that the extrema are expressed in pixel units, not in - scanlines. The triangle's height is certainly (P3.y-P2.y+1) - pixel units, but its profiles' heights are computed in - scanlines. The exact conversion is simple: - - - min scanline = FLOOR ( min y ) - - max scanline = CEILING( max y ) - - A problem arises with Bézier Arcs. While a segment is always - necessarily y-monotonic (i.e., flat, ascending, or descending), - which makes extrema computations easy, the ascent of an arc can - vary between its control points. - - - P2 - * - # on curve - * off curve - __-x--_ - _-- -_ - P1 _- - A non y-monotonic Bézier arc. - # \ - - The arc goes from P1 to P3. - \ - \ P3 - # - - - We first need to be able to easily detect non-monotonic arcs, - according to their control points. I will state here, without - proof, that the monotony condition can be expressed as: - - P1.y <= P2.y <= P3.y for an ever-ascending arc - - P1.y >= P2.y >= P3.y for an ever-descending arc - - with the special case of - - P1.y = P2.y = P3.y where the arc is said to be `flat'. - - As you can see, these conditions can be very easily tested. - They are, however, extremely important, as any arc that does not - satisfy them necessarily contains an extremum. - - Note also that a monotonic arc can contain an extremum too, - which is then one of its `on' points: - - - P1 P2 - #---__ * P1P2P3 is ever-descending, but P1 - -_ is an y-extremum. - - - ---_ \ - -> \ - \ P3 - # - - - Let's go back to our previous example: - - - P2 - * - # on curve - * off curve - __-x--_ - _-- -_ - P1 _- - A non-y-monotonic Bézier arc. - # \ - - Here we have - \ P2.y >= P1.y && - \ P3 P2.y >= P3.y (!) - # - - - We need to compute the vertical maximum of this arc to be able - to compute a profile's height (the point marked by an `x'). The - arc's equation indicates that a direct computation is possible, - but we rely on a different technique, which use will become - apparent soon. - - Bézier arcs have the special property of being very easily - decomposed into two sub-arcs, which are themselves Bézier arcs. - Moreover, it is easy to prove that there is at most one vertical - extremum on each Bézier arc (for second-degree curves; similar - conditions can be found for third-order arcs). - - For instance, the following arc P1P2P3 can be decomposed into - two sub-arcs Q1Q2Q3 and R1R2R3: - - - P2 - * - # on curve - * off curve - - - original Bézier arc P1P2P3. - __---__ - _-- --_ - _- -_ - - - - / \ - / \ - # # - P1 P3 - - - - P2 - * - - - - Q3 Decomposed into two subarcs - Q2 R2 Q1Q2Q3 and R1R2R3 - * __-#-__ * - _-- --_ - _- R1 -_ Q1 = P1 R3 = P3 - - - Q2 = (P1+P2)/2 R2 = (P2+P3)/2 - / \ - / \ Q3 = R1 = (Q2+R2)/2 - # # - Q1 R3 Note that Q2, R2, and Q3=R1 - are on a single line which is - tangent to the curve. - - - We have then decomposed a non-y-monotonic Bézier curve into two - smaller sub-arcs. Note that in the above drawing, both sub-arcs - are monotonic, and that the extremum is then Q3=R1. However, in - a more general case, only one sub-arc is guaranteed to be - monotonic. Getting back to our former example: - - - Q2 - * - - __-x--_ R1 - _-- #_ - Q1 _- Q3 - R2 - # \ * - - - \ - \ R3 - # - - - Here, we see that, though Q1Q2Q3 is still non-monotonic, R1R2R3 - is ever descending: We thus know that it doesn't contain the - extremum. We can then re-subdivide Q1Q2Q3 into two sub-arcs and - go on recursively, stopping when we encounter two monotonic - subarcs, or when the subarcs become simply too small. - - We will finally find the vertical extremum. Note that the - iterative process of finding an extremum is called `flattening'. - - - e. Computing Profiles Coordinates - - Once we have the height of each profile, we are able to allocate - it in the render pool. The next task is to compute coordinates - for each scanline. - - In the case of segments, the computation is straightforward, - using the Euclidean algorithm (also known as Bresenham). - However, for Bézier arcs, the job is a little more complicated. - - We assume that all Béziers that are part of a profile are the - result of flattening the curve, which means that they are all - y-monotonic (ascending or descending, and never flat). We now - have to compute the intersections of arcs with the profile's - scanlines. One way is to use a similar scheme to flattening - called `stepping'. - - - Consider this arc, going from P1 to - --------------------- P3. Suppose that we need to - compute its intersections with the - drawn scanlines. As already - --------------------- mentioned this can be done - directly, but the involved - * P2 _---# P3 algorithm is far too slow. - ------------- _-- -- - _- - _/ Instead, it is still possible to - ---------/----------- use the decomposition property in - / the same recursive way, i.e., - | subdivide the arc into subarcs - ------|-------------- until these get too small to cross - | more than one scanline! - | - -----|--------------- This is very easily done using a - | rasterizer-managed stack of - | subarcs. - # P1 - - - f. Sweeping and Sorting the Spans - - Once all our profiles have been computed, we begin the sweep to - build (and fill) the spans. - - As both the TrueType and Type 1 specifications use the winding - fill rule (but with opposite directions), we place, on each - scanline, the present profiles in two separate lists. - - One list, called the `left' one, only contains ascending - profiles, while the other `right' list contains the descending - profiles. - - As each glyph is made of closed curves, a simple geometric - property ensures that the two lists contain the same number of - elements. - - Creating spans is thus straightforward: - - 1. We sort each list in increasing horizontal order. - - 2. We pair each value of the left list with its corresponding - value in the right list. - - - / / | | For example, we have here - / / | | four profiles. Two of - >/ / | | | them are ascending (1 & - 1// / ^ | | | 2 3), while the two others - // // 3| | | v are descending (2 & 4). - / //4 | | | On the given scanline, - a / /< | | the left list is (1,3), - - - - *-----* - - - - *---* - - y - and the right one is - / / b c| |d (4,2) (sorted). - - There are then two spans, joining - 1 to 4 (i.e. a-b) and 3 to 2 - (i.e. c-d)! - - - Sorting doesn't necessarily take much time, as in 99 cases out - of 100, the lists' order is kept from one scanline to the next. - We can thus implement it with two simple singly-linked lists, - sorted by a classic bubble-sort, which takes a minimum amount of - time when the lists are already sorted. - - A previous version of the rasterizer used more elaborate - structures, like arrays to perform `faster' sorting. It turned - out that this old scheme is not faster than the one described - above. - - Once the spans have been `created', we can simply draw them in - the target bitmap. - ------------------------------------------------------------------------- - -Copyright (C) 2003-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute this -file you indicate that you have read the license and understand and -accept it fully. - - ---- end of raster.txt --- - -Local Variables: -coding: utf-8 -End: diff --git a/ThirdParty/freetype/docs/reference/README b/ThirdParty/freetype/docs/reference/README deleted file mode 100644 index 3ffcfc0..0000000 --- a/ThirdParty/freetype/docs/reference/README +++ /dev/null @@ -1,35 +0,0 @@ -After saying `make refdoc' or `make refdoc-venv' the `site/' directory -contains the FreeType API reference. You need python and pip to make this -target. - -There are two ways to generate the documentation: - -1. Using `make refdoc': - - - Ensure `python' and `pip' are available. - - Install pip package `docwriter' with `pip install --user docwriter'. - - Make target with `make refdoc'. - - This target can be run offline once required packages are installed. - -2. Using `make refdoc-venv' (requires internet access): - - - Ensure `python', `pip' and python package `virtualenv' are available. - - Make target with `make refdoc-venv'. - - This may or may not require internet access every time depending on - pip and system caching. - -This also works with Jam: Just type `jam refdoc' in the main directory. - -Some troubleshooting tips: - -* Regularly run `pip install --upgrade docwriter' to check for updates which -may include bug fixes. - -* Ensure that `docwriter' is installed in the same python target that -`make refdoc' uses (python3/python2/python). - -* `pip' and `python' may point to different versions of Python. Check using -`python --version' and `pip --version'. - -* If none of this works, send a mail to `freetype-devel@nongnu.org' or file -an issue at `https://github.com/freetype/docwriter/issues'. diff --git a/ThirdParty/freetype/docs/reference/site/404.html b/ThirdParty/freetype/docs/reference/site/404.html deleted file mode 100644 index 4322e97..0000000 --- a/ThirdParty/freetype/docs/reference/site/404.html +++ /dev/null @@ -1,1034 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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\ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/assets/javascripts/lunr/lunr.no.js b/ThirdParty/freetype/docs/reference/site/assets/javascripts/lunr/lunr.no.js deleted file mode 100644 index 3d156b9..0000000 --- a/ThirdParty/freetype/docs/reference/site/assets/javascripts/lunr/lunr.no.js +++ /dev/null @@ -1 +0,0 @@ -!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. 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.md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=light-green]{background-color:#7cb342}[data-md-color-primary=light-green] .md-typeset a{color:#7cb342}[data-md-color-primary=light-green] .md-header{background-color:#7cb342}[data-md-color-primary=light-green] .md-hero{background-color:#7cb342}[data-md-color-primary=light-green] .md-nav__link--active,[data-md-color-primary=light-green] .md-nav__link:active{color:#7cb342}[data-md-color-primary=light-green] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=lime]{background-color:#c0ca33}[data-md-color-primary=lime] .md-typeset a{color:#c0ca33}[data-md-color-primary=lime] .md-header{background-color:#c0ca33}[data-md-color-primary=lime] .md-hero{background-color:#c0ca33}[data-md-color-primary=lime] .md-nav__link--active,[data-md-color-primary=lime] .md-nav__link:active{color:#c0ca33}[data-md-color-primary=lime] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=yellow]{background-color:#f9a825}[data-md-color-primary=yellow] .md-typeset a{color:#f9a825}[data-md-color-primary=yellow] .md-header{background-color:#f9a825}[data-md-color-primary=yellow] .md-hero{background-color:#f9a825}[data-md-color-primary=yellow] .md-nav__link--active,[data-md-color-primary=yellow] .md-nav__link:active{color:#f9a825}[data-md-color-primary=yellow] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=amber]{background-color:#ffa000}[data-md-color-primary=amber] .md-typeset a{color:#ffa000}[data-md-color-primary=amber] .md-header{background-color:#ffa000}[data-md-color-primary=amber] .md-hero{background-color:#ffa000}[data-md-color-primary=amber] .md-nav__link--active,[data-md-color-primary=amber] .md-nav__link:active{color:#ffa000}[data-md-color-primary=amber] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=orange]{background-color:#fb8c00}[data-md-color-primary=orange] .md-typeset a{color:#fb8c00}[data-md-color-primary=orange] .md-header{background-color:#fb8c00}[data-md-color-primary=orange] .md-hero{background-color:#fb8c00}[data-md-color-primary=orange] .md-nav__link--active,[data-md-color-primary=orange] .md-nav__link:active{color:#fb8c00}[data-md-color-primary=orange] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=deep-orange]{background-color:#ff7043}[data-md-color-primary=deep-orange] .md-typeset a{color:#ff7043}[data-md-color-primary=deep-orange] .md-header{background-color:#ff7043}[data-md-color-primary=deep-orange] .md-hero{background-color:#ff7043}[data-md-color-primary=deep-orange] .md-nav__link--active,[data-md-color-primary=deep-orange] .md-nav__link:active{color:#ff7043}[data-md-color-primary=deep-orange] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=brown]{background-color:#795548}[data-md-color-primary=brown] .md-typeset a{color:#795548}[data-md-color-primary=brown] .md-header{background-color:#795548}[data-md-color-primary=brown] .md-hero{background-color:#795548}[data-md-color-primary=brown] .md-nav__link--active,[data-md-color-primary=brown] .md-nav__link:active{color:#795548}[data-md-color-primary=brown] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=grey]{background-color:#757575}[data-md-color-primary=grey] .md-typeset a{color:#757575}[data-md-color-primary=grey] .md-header{background-color:#757575}[data-md-color-primary=grey] .md-hero{background-color:#757575}[data-md-color-primary=grey] .md-nav__link--active,[data-md-color-primary=grey] .md-nav__link:active{color:#757575}[data-md-color-primary=grey] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=blue-grey]{background-color:#546e7a}[data-md-color-primary=blue-grey] .md-typeset a{color:#546e7a}[data-md-color-primary=blue-grey] .md-header{background-color:#546e7a}[data-md-color-primary=blue-grey] .md-hero{background-color:#546e7a}[data-md-color-primary=blue-grey] .md-nav__link--active,[data-md-color-primary=blue-grey] .md-nav__link:active{color:#546e7a}[data-md-color-primary=blue-grey] .md-nav__item--nested>.md-nav__link{color:inherit}button[data-md-color-primary=white]{background-color:#fff;color:rgba(0,0,0,.87);box-shadow:inset 0 0 .05rem rgba(0,0,0,.54)}[data-md-color-primary=white] .md-header{background-color:#fff;color:rgba(0,0,0,.87)}[data-md-color-primary=white] .md-hero{background-color:#fff;color:rgba(0,0,0,.87)}[data-md-color-primary=white] .md-hero--expand{border-bottom:.05rem solid rgba(0,0,0,.07)}button[data-md-color-accent=red]{background-color:#ff1744}[data-md-color-accent=red] .md-typeset a:active,[data-md-color-accent=red] .md-typeset a:hover{color:#ff1744}[data-md-color-accent=red] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=red] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#ff1744}[data-md-color-accent=red] .md-typeset .md-clipboard:active:before,[data-md-color-accent=red] .md-typeset .md-clipboard:hover:before{color:#ff1744}[data-md-color-accent=red] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=red] .md-typeset .footnote li:target .footnote-backref{color:#ff1744}[data-md-color-accent=red] .md-typeset [id] .headerlink:focus,[data-md-color-accent=red] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=red] .md-typeset [id]:target .headerlink{color:#ff1744}[data-md-color-accent=red] .md-nav__link:focus,[data-md-color-accent=red] .md-nav__link:hover{color:#ff1744}[data-md-color-accent=red] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#ff1744}[data-md-color-accent=red] .md-search-result__link:hover,[data-md-color-accent=red] .md-search-result__link[data-md-state=active]{background-color:rgba(255,23,68,.1)}[data-md-color-accent=red] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#ff1744}[data-md-color-accent=red] .md-source-file:hover:before{background-color:#ff1744}button[data-md-color-accent=pink]{background-color:#f50057}[data-md-color-accent=pink] .md-typeset a:active,[data-md-color-accent=pink] .md-typeset a:hover{color:#f50057}[data-md-color-accent=pink] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=pink] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#f50057}[data-md-color-accent=pink] .md-typeset .md-clipboard:active:before,[data-md-color-accent=pink] .md-typeset .md-clipboard:hover:before{color:#f50057}[data-md-color-accent=pink] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=pink] .md-typeset .footnote li:target .footnote-backref{color:#f50057}[data-md-color-accent=pink] .md-typeset [id] .headerlink:focus,[data-md-color-accent=pink] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=pink] .md-typeset [id]:target .headerlink{color:#f50057}[data-md-color-accent=pink] .md-nav__link:focus,[data-md-color-accent=pink] .md-nav__link:hover{color:#f50057}[data-md-color-accent=pink] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#f50057}[data-md-color-accent=pink] .md-search-result__link:hover,[data-md-color-accent=pink] .md-search-result__link[data-md-state=active]{background-color:rgba(245,0,87,.1)}[data-md-color-accent=pink] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#f50057}[data-md-color-accent=pink] .md-source-file:hover:before{background-color:#f50057}button[data-md-color-accent=purple]{background-color:#e040fb}[data-md-color-accent=purple] .md-typeset a:active,[data-md-color-accent=purple] .md-typeset a:hover{color:#e040fb}[data-md-color-accent=purple] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=purple] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#e040fb}[data-md-color-accent=purple] .md-typeset .md-clipboard:active:before,[data-md-color-accent=purple] .md-typeset .md-clipboard:hover:before{color:#e040fb}[data-md-color-accent=purple] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=purple] .md-typeset .footnote li:target .footnote-backref{color:#e040fb}[data-md-color-accent=purple] .md-typeset [id] .headerlink:focus,[data-md-color-accent=purple] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=purple] .md-typeset [id]:target .headerlink{color:#e040fb}[data-md-color-accent=purple] .md-nav__link:focus,[data-md-color-accent=purple] .md-nav__link:hover{color:#e040fb}[data-md-color-accent=purple] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#e040fb}[data-md-color-accent=purple] .md-search-result__link:hover,[data-md-color-accent=purple] .md-search-result__link[data-md-state=active]{background-color:rgba(224,64,251,.1)}[data-md-color-accent=purple] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#e040fb}[data-md-color-accent=purple] .md-source-file:hover:before{background-color:#e040fb}button[data-md-color-accent=deep-purple]{background-color:#7c4dff}[data-md-color-accent=deep-purple] .md-typeset a:active,[data-md-color-accent=deep-purple] .md-typeset a:hover{color:#7c4dff}[data-md-color-accent=deep-purple] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=deep-purple] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#7c4dff}[data-md-color-accent=deep-purple] .md-typeset .md-clipboard:active:before,[data-md-color-accent=deep-purple] .md-typeset .md-clipboard:hover:before{color:#7c4dff}[data-md-color-accent=deep-purple] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=deep-purple] .md-typeset .footnote li:target .footnote-backref{color:#7c4dff}[data-md-color-accent=deep-purple] .md-typeset [id] .headerlink:focus,[data-md-color-accent=deep-purple] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=deep-purple] .md-typeset [id]:target .headerlink{color:#7c4dff}[data-md-color-accent=deep-purple] .md-nav__link:focus,[data-md-color-accent=deep-purple] .md-nav__link:hover{color:#7c4dff}[data-md-color-accent=deep-purple] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#7c4dff}[data-md-color-accent=deep-purple] .md-search-result__link:hover,[data-md-color-accent=deep-purple] .md-search-result__link[data-md-state=active]{background-color:rgba(124,77,255,.1)}[data-md-color-accent=deep-purple] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#7c4dff}[data-md-color-accent=deep-purple] .md-source-file:hover:before{background-color:#7c4dff}button[data-md-color-accent=indigo]{background-color:#536dfe}[data-md-color-accent=indigo] .md-typeset a:active,[data-md-color-accent=indigo] .md-typeset a:hover{color:#536dfe}[data-md-color-accent=indigo] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=indigo] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#536dfe}[data-md-color-accent=indigo] .md-typeset .md-clipboard:active:before,[data-md-color-accent=indigo] .md-typeset .md-clipboard:hover:before{color:#536dfe}[data-md-color-accent=indigo] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=indigo] .md-typeset .footnote li:target .footnote-backref{color:#536dfe}[data-md-color-accent=indigo] .md-typeset [id] .headerlink:focus,[data-md-color-accent=indigo] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=indigo] .md-typeset [id]:target .headerlink{color:#536dfe}[data-md-color-accent=indigo] .md-nav__link:focus,[data-md-color-accent=indigo] .md-nav__link:hover{color:#536dfe}[data-md-color-accent=indigo] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#536dfe}[data-md-color-accent=indigo] .md-search-result__link:hover,[data-md-color-accent=indigo] .md-search-result__link[data-md-state=active]{background-color:rgba(83,109,254,.1)}[data-md-color-accent=indigo] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#536dfe}[data-md-color-accent=indigo] .md-source-file:hover:before{background-color:#536dfe}button[data-md-color-accent=blue]{background-color:#448aff}[data-md-color-accent=blue] .md-typeset a:active,[data-md-color-accent=blue] .md-typeset a:hover{color:#448aff}[data-md-color-accent=blue] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=blue] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#448aff}[data-md-color-accent=blue] .md-typeset .md-clipboard:active:before,[data-md-color-accent=blue] .md-typeset .md-clipboard:hover:before{color:#448aff}[data-md-color-accent=blue] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=blue] .md-typeset .footnote li:target .footnote-backref{color:#448aff}[data-md-color-accent=blue] .md-typeset [id] .headerlink:focus,[data-md-color-accent=blue] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=blue] .md-typeset [id]:target .headerlink{color:#448aff}[data-md-color-accent=blue] .md-nav__link:focus,[data-md-color-accent=blue] .md-nav__link:hover{color:#448aff}[data-md-color-accent=blue] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#448aff}[data-md-color-accent=blue] .md-search-result__link:hover,[data-md-color-accent=blue] .md-search-result__link[data-md-state=active]{background-color:rgba(68,138,255,.1)}[data-md-color-accent=blue] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#448aff}[data-md-color-accent=blue] .md-source-file:hover:before{background-color:#448aff}button[data-md-color-accent=light-blue]{background-color:#0091ea}[data-md-color-accent=light-blue] .md-typeset a:active,[data-md-color-accent=light-blue] .md-typeset a:hover{color:#0091ea}[data-md-color-accent=light-blue] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=light-blue] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#0091ea}[data-md-color-accent=light-blue] .md-typeset .md-clipboard:active:before,[data-md-color-accent=light-blue] .md-typeset .md-clipboard:hover:before{color:#0091ea}[data-md-color-accent=light-blue] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=light-blue] .md-typeset .footnote li:target .footnote-backref{color:#0091ea}[data-md-color-accent=light-blue] .md-typeset [id] .headerlink:focus,[data-md-color-accent=light-blue] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=light-blue] .md-typeset [id]:target .headerlink{color:#0091ea}[data-md-color-accent=light-blue] .md-nav__link:focus,[data-md-color-accent=light-blue] .md-nav__link:hover{color:#0091ea}[data-md-color-accent=light-blue] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#0091ea}[data-md-color-accent=light-blue] .md-search-result__link:hover,[data-md-color-accent=light-blue] .md-search-result__link[data-md-state=active]{background-color:rgba(0,145,234,.1)}[data-md-color-accent=light-blue] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#0091ea}[data-md-color-accent=light-blue] .md-source-file:hover:before{background-color:#0091ea}button[data-md-color-accent=cyan]{background-color:#00b8d4}[data-md-color-accent=cyan] .md-typeset a:active,[data-md-color-accent=cyan] .md-typeset a:hover{color:#00b8d4}[data-md-color-accent=cyan] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=cyan] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#00b8d4}[data-md-color-accent=cyan] .md-typeset .md-clipboard:active:before,[data-md-color-accent=cyan] .md-typeset .md-clipboard:hover:before{color:#00b8d4}[data-md-color-accent=cyan] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=cyan] .md-typeset .footnote li:target .footnote-backref{color:#00b8d4}[data-md-color-accent=cyan] .md-typeset [id] .headerlink:focus,[data-md-color-accent=cyan] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=cyan] .md-typeset [id]:target .headerlink{color:#00b8d4}[data-md-color-accent=cyan] .md-nav__link:focus,[data-md-color-accent=cyan] .md-nav__link:hover{color:#00b8d4}[data-md-color-accent=cyan] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#00b8d4}[data-md-color-accent=cyan] .md-search-result__link:hover,[data-md-color-accent=cyan] .md-search-result__link[data-md-state=active]{background-color:rgba(0,184,212,.1)}[data-md-color-accent=cyan] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#00b8d4}[data-md-color-accent=cyan] .md-source-file:hover:before{background-color:#00b8d4}button[data-md-color-accent=teal]{background-color:#00bfa5}[data-md-color-accent=teal] .md-typeset a:active,[data-md-color-accent=teal] .md-typeset a:hover{color:#00bfa5}[data-md-color-accent=teal] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=teal] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#00bfa5}[data-md-color-accent=teal] .md-typeset .md-clipboard:active:before,[data-md-color-accent=teal] .md-typeset .md-clipboard:hover:before{color:#00bfa5}[data-md-color-accent=teal] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=teal] .md-typeset .footnote li:target .footnote-backref{color:#00bfa5}[data-md-color-accent=teal] .md-typeset [id] .headerlink:focus,[data-md-color-accent=teal] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=teal] .md-typeset [id]:target .headerlink{color:#00bfa5}[data-md-color-accent=teal] .md-nav__link:focus,[data-md-color-accent=teal] .md-nav__link:hover{color:#00bfa5}[data-md-color-accent=teal] .md-search__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#00bfa5}[data-md-color-accent=teal] .md-search-result__link:hover,[data-md-color-accent=teal] .md-search-result__link[data-md-state=active]{background-color:rgba(0,191,165,.1)}[data-md-color-accent=teal] .md-sidebar__scrollwrap::-webkit-scrollbar-thumb:hover{background-color:#00bfa5}[data-md-color-accent=teal] .md-source-file:hover:before{background-color:#00bfa5}button[data-md-color-accent=green]{background-color:#00c853}[data-md-color-accent=green] .md-typeset a:active,[data-md-color-accent=green] .md-typeset a:hover{color:#00c853}[data-md-color-accent=green] .md-typeset .codehilite pre::-webkit-scrollbar-thumb:hover,[data-md-color-accent=green] .md-typeset pre code::-webkit-scrollbar-thumb:hover{background-color:#00c853}[data-md-color-accent=green] .md-typeset .md-clipboard:active:before,[data-md-color-accent=green] .md-typeset .md-clipboard:hover:before{color:#00c853}[data-md-color-accent=green] .md-typeset .footnote li:hover .footnote-backref:hover,[data-md-color-accent=green] .md-typeset .footnote li:target .footnote-backref{color:#00c853}[data-md-color-accent=green] .md-typeset [id] .headerlink:focus,[data-md-color-accent=green] .md-typeset [id]:hover .headerlink:hover,[data-md-color-accent=green] .md-typeset [id]:target .headerlink{color:#00c853}[data-md-color-accent=green] .md-nav__link:focus,[data-md-color-accent=green] .md-nav__link:hover{color:#00c853}[data-md-color-accent=green] 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.md-nav__button{display:block;position:absolute;top:.2rem;left:.2rem;width:3.2rem;height:3.2rem;font-size:2.4rem}html .md-nav--primary .md-nav__title--site:before{display:none}html [dir=rtl] .md-nav--primary .md-nav__title:before{right:.2rem;left:auto}html [dir=rtl] .md-nav--primary .md-nav__title--site .md-nav__button{right:.2rem;left:auto}.md-nav--primary .md-nav__list{flex:1;overflow-y:auto}.md-nav--primary .md-nav__item{padding:0;border-top:.05rem solid rgba(0,0,0,.07)}[dir=rtl] .md-nav--primary .md-nav__item{padding:0}.md-nav--primary .md-nav__item--nested>.md-nav__link{padding-right:2.4rem}[dir=rtl] .md-nav--primary .md-nav__item--nested>.md-nav__link{padding-right:.8rem;padding-left:2.4rem}.md-nav--primary .md-nav__item--nested>.md-nav__link:after{content:"\E315"}[dir=rtl] .md-nav--primary .md-nav__item--nested>.md-nav__link:after{content:"\E314"}.md-nav--primary .md-nav__link{position:relative;margin-top:0;padding:.6rem .8rem}.md-nav--primary 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.md-sidebar--primary{-webkit-transform:translateX(-12.1rem);transform:translateX(-12.1rem)}.no-csstransforms3d [data-md-toggle=drawer]:checked~.md-container .md-sidebar--primary{display:block}.md-sidebar--primary .md-sidebar__scrollwrap{overflow:hidden;position:absolute;top:0;right:0;bottom:0;left:0;margin:0}.md-tabs{display:none}}@media only screen and (min-width:60em){.md-content{margin-right:12.1rem}[dir=rtl] .md-content{margin-right:0;margin-left:12.1rem}.md-header-nav__button.md-icon--search{display:none}.md-header-nav__source{display:block;width:11.5rem;max-width:11.5rem;margin-left:1.4rem;padding-right:.6rem}[dir=rtl] .md-header-nav__source{margin-right:1.4rem;margin-left:0;padding-right:0;padding-left:.6rem}.md-search{padding:.2rem}.md-search__overlay{position:fixed;top:0;left:0;width:0;height:0;transition:width 0s .25s,height 0s .25s,opacity .25s;background-color:rgba(0,0,0,.54);cursor:pointer}[dir=rtl] 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.md-search__input{padding-right:2.2rem}.md-search__input+.md-search__icon{color:inherit}.md-search__input::-webkit-input-placeholder{color:hsla(0,0%,100%,.7)}.md-search__input:-ms-input-placeholder{color:hsla(0,0%,100%,.7)}.md-search__input::-ms-input-placeholder{color:hsla(0,0%,100%,.7)}.md-search__input::placeholder{color:hsla(0,0%,100%,.7)}.md-search__input:hover{background-color:hsla(0,0%,100%,.12)}[data-md-toggle=search]:checked~.md-header .md-search__input{border-radius:.1rem .1rem 0 0;background-color:#fff;color:rgba(0,0,0,.87);text-overflow:none}[data-md-toggle=search]:checked~.md-header .md-search__input+.md-search__icon,[data-md-toggle=search]:checked~.md-header .md-search__input::-webkit-input-placeholder{color:rgba(0,0,0,.54)}[data-md-toggle=search]:checked~.md-header .md-search__input+.md-search__icon,[data-md-toggle=search]:checked~.md-header .md-search__input:-ms-input-placeholder{color:rgba(0,0,0,.54)}[data-md-toggle=search]:checked~.md-header 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.md-search-result__meta{padding-right:2.2rem;padding-left:0}.md-search-result__article{padding-left:2.2rem}[dir=rtl] .md-search-result__article{padding-right:2.2rem;padding-left:.8rem}.md-sidebar--secondary{display:block;margin-left:100%;-webkit-transform:translate(-100%);transform:translate(-100%)}[dir=rtl] .md-sidebar--secondary{margin-right:100%;margin-left:0;-webkit-transform:translate(100%);transform:translate(100%)}}@media only screen and (min-width:76.25em){.md-content{margin-left:12.1rem}[dir=rtl] .md-content{margin-right:12.1rem}.md-content__inner{margin-right:1.2rem;margin-left:1.2rem}.md-header-nav__button.md-icon--menu{display:none}.md-nav[data-md-state=animate]{transition:max-height .25s cubic-bezier(.86,0,.07,1)}.md-nav__toggle~.md-nav{max-height:0;overflow:hidden}.no-js .md-nav__toggle~.md-nav{display:none}.md-nav[data-md-state=expand],.md-nav__toggle:checked~.md-nav{max-height:100%}.no-js .md-nav[data-md-state=expand],.no-js 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(min-width:45em){.md-footer-nav__link{width:50%}.md-footer-copyright{max-width:75%;float:left}[dir=rtl] .md-footer-copyright{float:right}.md-footer-social{padding:.6rem 0;float:right}[dir=rtl] .md-footer-social{float:left}}@media only screen and (max-width:29.9375em){[data-md-toggle=search]:checked~.md-header .md-search__overlay{-webkit-transform:scale(45);transform:scale(45)}}@media only screen and (min-width:30em) and (max-width:44.9375em){[data-md-toggle=search]:checked~.md-header .md-search__overlay{-webkit-transform:scale(60);transform:scale(60)}}@media only screen and (min-width:45em) and (max-width:59.9375em){[data-md-toggle=search]:checked~.md-header .md-search__overlay{-webkit-transform:scale(75);transform:scale(75)}}@media only screen and (min-width:60em) and (max-width:76.1875em){[data-md-toggle=search]:checked~.md-header .md-search__inner{width:23.4rem}.md-search__scrollwrap{width:23.4rem}.md-search-result__teaser{max-height:2.5rem;-webkit-line-clamp:3}} \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-auto_hinter.html b/ThirdParty/freetype/docs/reference/site/ft2-auto_hinter.html deleted file mode 100644 index 1d28663..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-auto_hinter.html +++ /dev/null @@ -1,1155 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The auto-hinter - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Controlling FreeType Modules » The auto-hinter

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The auto-hinter

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Synopsis

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While FreeType's auto-hinter doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get. The following lists the available properties together with the necessary macros and structures.

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Note that the auto-hinter's module name is ‘autofitter’ for historical reasons.

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Available properties are increase-x-height, no-stem-darkening (experimental), darkening-parameters (experimental), warping (experimental), glyph-to-script-map (experimental), fallback-script (experimental), and default-script (experimental), as documented in the ‘Driver properties’ section.

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FreeType » Docs » Core API » Base Interface

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Base Interface

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Synopsis

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This section describes the most important public high-level API functions of FreeType 2.

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FT_Library

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Defined in FT_FREETYPE_H (freetype/freetype.h).

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-  typedef struct FT_LibraryRec_  *FT_Library;
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A handle to a FreeType library instance. Each ‘library’ is completely independent from the others; it is the ‘root’ of a set of objects like fonts, faces, sizes, etc.

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It also embeds a memory manager (see FT_Memory), as well as a scan-line converter object (see FT_Raster).

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[Since 2.5.6] In multi-threaded applications it is easiest to use one FT_Library object per thread. In case this is too cumbersome, a single FT_Library object across threads is possible also, as long as a mutex lock is used around FT_New_Face and FT_Done_Face.

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Library objects are normally created by FT_Init_FreeType, and destroyed with FT_Done_FreeType. If you need reference-counting (cf. FT_Reference_Library), use FT_New_Library and FT_Done_Library.

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FT_Face

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Defined in FT_FREETYPE_H (freetype/freetype.h).

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A handle to a typographic face object. A face object models a given typeface, in a given style.

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A face object also owns a single FT_GlyphSlot object, as well as one or more FT_Size objects.

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Use FT_New_Face or FT_Open_Face to create a new face object from a given filepath or a custom input stream.

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Use FT_Done_Face to destroy it (along with its slot and sizes).

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An FT_Face object can only be safely used from one thread at a time. Similarly, creation and destruction of FT_Face with the same FT_Library object can only be done from one thread at a time. On the other hand, functions like FT_Load_Glyph and its siblings are thread-safe and do not need the lock to be held as long as the same FT_Face object is not used from multiple threads at the same time.

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See FT_FaceRec for the publicly accessible fields of a given face object.

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FT_Size

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Defined in FT_FREETYPE_H (freetype/freetype.h).

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A handle to an object that models a face scaled to a given character size.

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An FT_Face has one active FT_Size object that is used by functions like FT_Load_Glyph to determine the scaling transformation that in turn is used to load and hint glyphs and metrics.

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You can use FT_Set_Char_Size, FT_Set_Pixel_Sizes, FT_Request_Size or even FT_Select_Size to change the content (i.e., the scaling values) of the active FT_Size.

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You can use FT_New_Size to create additional size objects for a given FT_Face, but they won't be used by other functions until you activate it through FT_Activate_Size. Only one size can be activated at any given time per face.

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See FT_SizeRec for the publicly accessible fields of a given size object.

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FT_GlyphSlot

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Defined in FT_FREETYPE_H (freetype/freetype.h).

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A handle to a given ‘glyph slot’. A slot is a container that can hold any of the glyphs contained in its parent face.

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In other words, each time you call FT_Load_Glyph or FT_Load_Char, the slot's content is erased by the new glyph data, i.e., the glyph's metrics, its image (bitmap or outline), and other control information.

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See FT_GlyphSlotRec for the publicly accessible glyph fields.

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FT_CharMap

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Defined in FT_FREETYPE_H (freetype/freetype.h).

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A handle to a character map (usually abbreviated to ‘charmap’). A charmap is used to translate character codes in a given encoding into glyph indexes for its parent's face. Some font formats may provide several charmaps per font.

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Each face object owns zero or more charmaps, but only one of them can be ‘active’, providing the data used by FT_Get_Char_Index or FT_Load_Char.

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The list of available charmaps in a face is available through the face->num_charmaps and face->charmaps fields of FT_FaceRec.

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The currently active charmap is available as face->charmap. You should call FT_Set_Charmap to change it.

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When a new face is created (either through FT_New_Face or FT_Open_Face), the library looks for a Unicode charmap within the list and automatically activates it. If there is no Unicode charmap, FreeType doesn't set an ‘active’ charmap.

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FT_Encoding

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Defined in FT_FREETYPE_H (freetype/freetype.h).

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-    FT_ENC_TAG( FT_ENCODING_NONE, 0, 0, 0, 0 ),
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-    FT_ENC_TAG( FT_ENCODING_MS_SYMBOL, 's', 'y', 'm', 'b' ),
-    FT_ENC_TAG( FT_ENCODING_UNICODE,   'u', 'n', 'i', 'c' ),
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-    FT_ENC_TAG( FT_ENCODING_SJIS,    's', 'j', 'i', 's' ),
-    FT_ENC_TAG( FT_ENCODING_PRC,     'g', 'b', ' ', ' ' ),
-    FT_ENC_TAG( FT_ENCODING_BIG5,    'b', 'i', 'g', '5' ),
-    FT_ENC_TAG( FT_ENCODING_WANSUNG, 'w', 'a', 'n', 's' ),
-    FT_ENC_TAG( FT_ENCODING_JOHAB,   'j', 'o', 'h', 'a' ),
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-    /* for backward compatibility */
-    FT_ENCODING_GB2312     = FT_ENCODING_PRC,
-    FT_ENCODING_MS_SJIS    = FT_ENCODING_SJIS,
-    FT_ENCODING_MS_GB2312  = FT_ENCODING_PRC,
-    FT_ENCODING_MS_BIG5    = FT_ENCODING_BIG5,
-    FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG,
-    FT_ENCODING_MS_JOHAB   = FT_ENCODING_JOHAB,
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-    FT_ENC_TAG( FT_ENCODING_ADOBE_STANDARD, 'A', 'D', 'O', 'B' ),
-    FT_ENC_TAG( FT_ENCODING_ADOBE_EXPERT,   'A', 'D', 'B', 'E' ),
-    FT_ENC_TAG( FT_ENCODING_ADOBE_CUSTOM,   'A', 'D', 'B', 'C' ),
-    FT_ENC_TAG( FT_ENCODING_ADOBE_LATIN_1,  'l', 'a', 't', '1' ),
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-    FT_ENC_TAG( FT_ENCODING_OLD_LATIN_2, 'l', 'a', 't', '2' ),
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-    FT_ENC_TAG( FT_ENCODING_APPLE_ROMAN, 'a', 'r', 'm', 'n' )
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-  } FT_Encoding;
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-  /* these constants are deprecated; use the corresponding `FT_Encoding` */
-  /* values instead                                                      */
-#define ft_encoding_none            FT_ENCODING_NONE
-#define ft_encoding_unicode         FT_ENCODING_UNICODE
-#define ft_encoding_symbol          FT_ENCODING_MS_SYMBOL
-#define ft_encoding_latin_1         FT_ENCODING_ADOBE_LATIN_1
-#define ft_encoding_latin_2         FT_ENCODING_OLD_LATIN_2
-#define ft_encoding_sjis            FT_ENCODING_SJIS
-#define ft_encoding_gb2312          FT_ENCODING_PRC
-#define ft_encoding_big5            FT_ENCODING_BIG5
-#define ft_encoding_wansung         FT_ENCODING_WANSUNG
-#define ft_encoding_johab           FT_ENCODING_JOHAB
-
-#define ft_encoding_adobe_standard  FT_ENCODING_ADOBE_STANDARD
-#define ft_encoding_adobe_expert    FT_ENCODING_ADOBE_EXPERT
-#define ft_encoding_adobe_custom    FT_ENCODING_ADOBE_CUSTOM
-#define ft_encoding_apple_roman     FT_ENCODING_APPLE_ROMAN
-
-
- -

An enumeration to specify character sets supported by charmaps. Used in the FT_Select_Charmap API function.

-

note

- -

Despite the name, this enumeration lists specific character repertories (i.e., charsets), and not text encoding methods (e.g., UTF-8, UTF-16, etc.).

-

Other encodings might be defined in the future.

-

values

- - - - - - - - - - - - - - - - - - - - - -
FT_ENCODING_NONE -

The encoding value 0 is reserved for all formats except BDF, PCF, and Windows FNT; see below for more information.

-
FT_ENCODING_UNICODE -

The Unicode character set. This value covers all versions of the Unicode repertoire, including ASCII and Latin-1. Most fonts include a Unicode charmap, but not all of them.

-

For example, if you want to access Unicode value U+1F028 (and the font contains it), use value 0x1F028 as the input value for FT_Get_Char_Index.

-
FT_ENCODING_MS_SYMBOL -

Microsoft Symbol encoding, used to encode mathematical symbols and wingdings. For more information, see ‘https://www.microsoft.com/typography/otspec/recom.htm’, ‘http://www.kostis.net/charsets/symbol.htm’, and ‘http://www.kostis.net/charsets/wingding.htm’.

-

This encoding uses character codes from the PUA (Private Unicode Area) in the range U+F020-U+F0FF.

-
FT_ENCODING_SJIS -

Shift JIS encoding for Japanese. More info at ‘https://en.wikipedia.org/wiki/Shift_JIS’. See note on multi-byte encodings below.

-
FT_ENCODING_PRC -

Corresponds to encoding systems mainly for Simplified Chinese as used in People's Republic of China (PRC). The encoding layout is based on GB 2312 and its supersets GBK and GB 18030.

-
FT_ENCODING_BIG5 -

Corresponds to an encoding system for Traditional Chinese as used in Taiwan and Hong Kong.

-
FT_ENCODING_WANSUNG -

Corresponds to the Korean encoding system known as Extended Wansung (MS Windows code page 949). For more information see ‘https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit949.txt’.

-
FT_ENCODING_JOHAB -

The Korean standard character set (KS C 5601-1992), which corresponds to MS Windows code page 1361. This character set includes all possible Hangul character combinations.

-
FT_ENCODING_ADOBE_LATIN_1 -

Corresponds to a Latin-1 encoding as defined in a Type 1 PostScript font. It is limited to 256 character codes.

-
FT_ENCODING_ADOBE_STANDARD -

Adobe Standard encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.

-
FT_ENCODING_ADOBE_EXPERT -

Adobe Expert encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.

-
FT_ENCODING_ADOBE_CUSTOM -

Corresponds to a custom encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.

-
FT_ENCODING_APPLE_ROMAN -

Apple roman encoding. Many TrueType and OpenType fonts contain a charmap for this 8-bit encoding, since older versions of Mac OS are able to use it.

-
FT_ENCODING_OLD_LATIN_2 -

This value is deprecated and was neither used nor reported by FreeType. Don't use or test for it.

-
FT_ENCODING_MS_SJIS -

Same as FT_ENCODING_SJIS. Deprecated.

-
FT_ENCODING_MS_GB2312 -

Same as FT_ENCODING_PRC. Deprecated.

-
FT_ENCODING_MS_BIG5 -

Same as FT_ENCODING_BIG5. Deprecated.

-
FT_ENCODING_MS_WANSUNG -

Same as FT_ENCODING_WANSUNG. Deprecated.

-
FT_ENCODING_MS_JOHAB -

Same as FT_ENCODING_JOHAB. Deprecated.

-
- -

note

- -

By default, FreeType enables a Unicode charmap and tags it with FT_ENCODING_UNICODE when it is either provided or can be generated from PostScript glyph name dictionaries in the font file. All other encodings are considered legacy and tagged only if explicitly defined in the font file. Otherwise, FT_ENCODING_NONE is used.

-

FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap is neither Unicode nor ISO-8859-1 (otherwise it is set to FT_ENCODING_UNICODE). Use FT_Get_BDF_Charset_ID to find out which encoding is really present. If, for example, the cs_registry field is ‘KOI8’ and the cs_encoding field is ‘R’, the font is encoded in KOI8-R.

-

FT_ENCODING_NONE is always set (with a single exception) by the winfonts driver. Use FT_Get_WinFNT_Header and examine the charset field of the FT_WinFNT_HeaderRec structure to find out which encoding is really present. For example, FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for Russian).

-

FT_ENCODING_NONE is set if platform_id is TT_PLATFORM_MACINTOSH and encoding_id is not TT_MAC_ID_ROMAN (otherwise it is set to FT_ENCODING_APPLE_ROMAN).

-

If platform_id is TT_PLATFORM_MACINTOSH, use the function FT_Get_CMap_Language_ID to query the Mac language ID that may be needed to be able to distinguish Apple encoding variants. See

-

https://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt

-

to get an idea how to do that. Basically, if the language ID is 0, don't use it, otherwise subtract 1 from the language ID. Then examine encoding_id. If, for example, encoding_id is TT_MAC_ID_ROMAN and the language ID (minus 1) is TT_MAC_LANGID_GREEK, it is the Greek encoding, not Roman. TT_MAC_ID_ARABIC with TT_MAC_LANGID_FARSI means the Farsi variant the Arabic encoding.

-
- -

FT_ENC_TAG

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#ifndef FT_ENC_TAG
-#define FT_ENC_TAG( value, a, b, c, d )         \
-          value = ( ( (FT_UInt32)(a) << 24 ) |  \
-                    ( (FT_UInt32)(b) << 16 ) |  \
-                    ( (FT_UInt32)(c) <<  8 ) |  \
-                      (FT_UInt32)(d)         )
-
-#endif /* FT_ENC_TAG */
-
-
- -

This macro converts four-letter tags into an unsigned long. It is used to define ‘encoding’ identifiers (see FT_Encoding).

-

note

- -

Since many 16-bit compilers don't like 32-bit enumerations, you should redefine this macro in case of problems to something like this: -

  #define FT_ENC_TAG( value, a, b, c, d )  value
-

-

to get a simple enumeration without assigning special numbers.

-
- -

FT_FaceRec

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_FaceRec_
-  {
-    FT_Long           num_faces;
-    FT_Long           face_index;
-
-    FT_Long           face_flags;
-    FT_Long           style_flags;
-
-    FT_Long           num_glyphs;
-
-    FT_String*        family_name;
-    FT_String*        style_name;
-
-    FT_Int            num_fixed_sizes;
-    FT_Bitmap_Size*   available_sizes;
-
-    FT_Int            num_charmaps;
-    FT_CharMap*       charmaps;
-
-    FT_Generic        generic;
-
-    /*# The following member variables (down to `underline_thickness`) */
-    /*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size    */
-    /*# for bitmap fonts.                                              */
-    FT_BBox           bbox;
-
-    FT_UShort         units_per_EM;
-    FT_Short          ascender;
-    FT_Short          descender;
-    FT_Short          height;
-
-    FT_Short          max_advance_width;
-    FT_Short          max_advance_height;
-
-    FT_Short          underline_position;
-    FT_Short          underline_thickness;
-
-    FT_GlyphSlot      glyph;
-    FT_Size           size;
-    FT_CharMap        charmap;
-
-    /*@private begin */
-
-    FT_Driver         driver;
-    FT_Memory         memory;
-    FT_Stream         stream;
-
-    FT_ListRec        sizes_list;
-
-    FT_Generic        autohint;   /* face-specific auto-hinter data */
-    void*             extensions; /* unused                         */
-
-    FT_Face_Internal  internal;
-
-    /*@private end */
-
-  } FT_FaceRec;
-
-
- -

FreeType root face class structure. A face object models a typeface in a font file.

-

fields

- - - - - - - - - - - - - - - - - - - - - - - - - - -
num_faces -

The number of faces in the font file. Some font formats can have multiple faces in a single font file.

-
face_index -

This field holds two different values. Bits 0-15 are the index of the face in the font file (starting with value 0). They are set to 0 if there is only one face in the font file.

-

[Since 2.6.1] Bits 16-30 are relevant to GX and OpenType variation fonts only, holding the named instance index for the current face index (starting with value 1; value 0 indicates font access without a named instance). For non-variation fonts, bits 16-30 are ignored. If we have the third named instance of face 4, say, face_index is set to 0x00030004.

-

Bit 31 is always zero (this is, face_index is always a positive value).

-

[Since 2.9] Changing the design coordinates with FT_Set_Var_Design_Coordinates or FT_Set_Var_Blend_Coordinates does not influence the named instance index value (only FT_Set_Named_Instance does that).

-
face_flags -

A set of bit flags that give important information about the face; see FT_FACE_FLAG_XXX for the details.

-
style_flags -

The lower 16 bits contain a set of bit flags indicating the style of the face; see FT_STYLE_FLAG_XXX for the details.

-

[Since 2.6.1] Bits 16-30 hold the number of named instances available for the current face if we have a GX or OpenType variation (sub)font. Bit 31 is always zero (this is, style_flags is always a positive value). Note that a variation font has always at least one named instance, namely the default instance.

-
num_glyphs -

The number of glyphs in the face. If the face is scalable and has sbits (see num_fixed_sizes), it is set to the number of outline glyphs.

-

For CID-keyed fonts (not in an SFNT wrapper) this value gives the highest CID used in the font.

-
family_name -

The face's family name. This is an ASCII string, usually in English, that describes the typeface's family (like ‘Times New Roman’, ‘Bodoni’, ‘Garamond’, etc). This is a least common denominator used to list fonts. Some formats (TrueType & OpenType) provide localized and Unicode versions of this string. Applications should use the format-specific interface to access them. Can be NULL (e.g., in fonts embedded in a PDF file).

-

In case the font doesn't provide a specific family name entry, FreeType tries to synthesize one, deriving it from other name entries.

-
style_name -

The face's style name. This is an ASCII string, usually in English, that describes the typeface's style (like ‘Italic’, ‘Bold’, ‘Condensed’, etc). Not all font formats provide a style name, so this field is optional, and can be set to NULL. As for family_name, some formats provide localized and Unicode versions of this string. Applications should use the format-specific interface to access them.

-
num_fixed_sizes -

The number of bitmap strikes in the face. Even if the face is scalable, there might still be bitmap strikes, which are called ‘sbits’ in that case.

-
available_sizes -

An array of FT_Bitmap_Size for all bitmap strikes in the face. It is set to NULL if there is no bitmap strike.

-

Note that FreeType tries to sanitize the strike data since they are sometimes sloppy or incorrect, but this can easily fail.

-
num_charmaps -

The number of charmaps in the face.

-
charmaps -

An array of the charmaps of the face.

-
generic -

A field reserved for client uses. See the FT_Generic type description.

-
bbox -

The font bounding box. Coordinates are expressed in font units (see units_per_EM). The box is large enough to contain any glyph from the font. Thus, bbox.yMax can be seen as the ‘maximum ascender’, and bbox.yMin as the ‘minimum descender’. Only relevant for scalable formats.

-

Note that the bounding box might be off by (at least) one pixel for hinted fonts. See FT_Size_Metrics for further discussion.

-
units_per_EM -

The number of font units per EM square for this face. This is typically 2048 for TrueType fonts, and 1000 for Type 1 fonts. Only relevant for scalable formats.

-
ascender -

The typographic ascender of the face, expressed in font units. For font formats not having this information, it is set to bbox.yMax. Only relevant for scalable formats.

-
descender -

The typographic descender of the face, expressed in font units. For font formats not having this information, it is set to bbox.yMin. Note that this field is negative for values below the baseline. Only relevant for scalable formats.

-
height -

This value is the vertical distance between two consecutive baselines, expressed in font units. It is always positive. Only relevant for scalable formats.

-

If you want the global glyph height, use ascender - descender.

-
max_advance_width -

The maximum advance width, in font units, for all glyphs in this face. This can be used to make word wrapping computations faster. Only relevant for scalable formats.

-
max_advance_height -

The maximum advance height, in font units, for all glyphs in this face. This is only relevant for vertical layouts, and is set to height for fonts that do not provide vertical metrics. Only relevant for scalable formats.

-
underline_position -

The position, in font units, of the underline line for this face. It is the center of the underlining stem. Only relevant for scalable formats.

-
underline_thickness -

The thickness, in font units, of the underline for this face. Only relevant for scalable formats.

-
glyph -

The face's associated glyph slot(s).

-
size -

The current active size for this face.

-
charmap -

The current active charmap for this face.

-
- -

note

- -

Fields may be changed after a call to FT_Attach_File or FT_Attach_Stream.

-

For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an ‘MVAR’ table: ascender, descender, height, underline_position, and underline_thickness.

-

Especially for TrueType fonts see also the documentation for FT_Size_Metrics.

-
- -

FT_HAS_HORIZONTAL

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_HORIZONTAL( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_HORIZONTAL )
-
-
- -

A macro that returns true whenever a face object contains horizontal metrics (this is true for all font formats though).

-

also

- -

FT_HAS_VERTICAL can be used to check for vertical metrics.

-
- -

FT_HAS_VERTICAL

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_VERTICAL( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_VERTICAL )
-
-
- -

A macro that returns true whenever a face object contains real vertical metrics (and not only synthesized ones).

-
- -

FT_HAS_KERNING

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_KERNING( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_KERNING )
-
-
- -

A macro that returns true whenever a face object contains kerning data that can be accessed with FT_Get_Kerning.

-
- -

FT_HAS_FIXED_SIZES

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_FIXED_SIZES( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_FIXED_SIZES )
-
-
- -

A macro that returns true whenever a face object contains some embedded bitmaps. See the available_sizes field of the FT_FaceRec structure.

-
- -

FT_HAS_GLYPH_NAMES

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_GLYPH_NAMES( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_GLYPH_NAMES )
-
-
- -

A macro that returns true whenever a face object contains some glyph names that can be accessed through FT_Get_Glyph_Name.

-
- -

FT_HAS_COLOR

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_COLOR( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_COLOR )
-
-
- -

A macro that returns true whenever a face object contains tables for color glyphs.

-

since

- -

2.5.1

-
- -

FT_HAS_MULTIPLE_MASTERS

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_MULTIPLE_MASTERS( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS )
-
-
- -

A macro that returns true whenever a face object contains some multiple masters. The functions provided by FT_MULTIPLE_MASTERS_H are then available to choose the exact design you want.

-
- -

FT_IS_SFNT

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_SFNT( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_SFNT )
-
-
- -

A macro that returns true whenever a face object contains a font whose format is based on the SFNT storage scheme. This usually means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded bitmap fonts.

-

If this macro is true, all functions defined in FT_SFNT_NAMES_H and FT_TRUETYPE_TABLES_H are available.

-
- -

FT_IS_SCALABLE

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_SCALABLE( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_SCALABLE )
-
-
- -

A macro that returns true whenever a face object contains a scalable font face (true for TrueType, Type 1, Type 42, CID, OpenType/CFF, and PFR font formats).

-
- -

FT_IS_FIXED_WIDTH

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_FIXED_WIDTH( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_FIXED_WIDTH )
-
-
- -

A macro that returns true whenever a face object contains a font face that contains fixed-width (or ‘monospace’, ‘fixed-pitch’, etc.) glyphs.

-
- -

FT_IS_CID_KEYED

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_CID_KEYED( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_CID_KEYED )
-
-
- -

A macro that returns true whenever a face object contains a CID-keyed font. See the discussion of FT_FACE_FLAG_CID_KEYED for more details.

-

If this macro is true, all functions defined in FT_CID_H are available.

-
- -

FT_IS_TRICKY

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_TRICKY( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_TRICKY )
-
-
- -

A macro that returns true whenever a face represents a ‘tricky’ font. See the discussion of FT_FACE_FLAG_TRICKY for more details.

-
- -

FT_IS_NAMED_INSTANCE

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_NAMED_INSTANCE( face ) \
-          ( (face)->face_index & 0x7FFF0000L )
-
-
- -

A macro that returns true whenever a face object is a named instance of a GX or OpenType variation font.

-

[Since 2.9] Changing the design coordinates with FT_Set_Var_Design_Coordinates or FT_Set_Var_Blend_Coordinates does not influence the return value of this macro (only FT_Set_Named_Instance does that).

-

since

- -

2.7

-
- -

FT_IS_VARIATION

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_IS_VARIATION( face ) \
-          ( (face)->face_flags & FT_FACE_FLAG_VARIATION )
-
-
- -

A macro that returns true whenever a face object has been altered by FT_Set_MM_Design_Coordinates, FT_Set_Var_Design_Coordinates, or FT_Set_Var_Blend_Coordinates.

-

since

- -

2.9

-
- -

FT_SizeRec

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_SizeRec_
-  {
-    FT_Face           face;      /* parent face object              */
-    FT_Generic        generic;   /* generic pointer for client uses */
-    FT_Size_Metrics   metrics;   /* size metrics                    */
-    FT_Size_Internal  internal;
-
-  } FT_SizeRec;
-
-
- -

FreeType root size class structure. A size object models a face object at a given size.

-

fields

- - - - - -
face -

Handle to the parent face object.

-
generic -

A typeless pointer, unused by the FreeType library or any of its drivers. It can be used by client applications to link their own data to each size object.

-
metrics -

Metrics for this size object. This field is read-only.

-
- -
- -

FT_Size_Metrics

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_Size_Metrics_
-  {
-    FT_UShort  x_ppem;      /* horizontal pixels per EM               */
-    FT_UShort  y_ppem;      /* vertical pixels per EM                 */
-
-    FT_Fixed   x_scale;     /* scaling values used to convert font    */
-    FT_Fixed   y_scale;     /* units to 26.6 fractional pixels        */
-
-    FT_Pos     ascender;    /* ascender in 26.6 frac. pixels          */
-    FT_Pos     descender;   /* descender in 26.6 frac. pixels         */
-    FT_Pos     height;      /* text height in 26.6 frac. pixels       */
-    FT_Pos     max_advance; /* max horizontal advance, in 26.6 pixels */
-
-  } FT_Size_Metrics;
-
-
- -

The size metrics structure gives the metrics of a size object.

-

fields

- - - - - - - - - - -
x_ppem -

The width of the scaled EM square in pixels, hence the term ‘ppem’ (pixels per EM). It is also referred to as ‘nominal width’.

-
y_ppem -

The height of the scaled EM square in pixels, hence the term ‘ppem’ (pixels per EM). It is also referred to as ‘nominal height’.

-
x_scale -

A 16.16 fractional scaling value to convert horizontal metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats.

-
y_scale -

A 16.16 fractional scaling value to convert vertical metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats.

-
ascender -

The ascender in 26.6 fractional pixels, rounded up to an integer value. See FT_FaceRec for the details.

-
descender -

The descender in 26.6 fractional pixels, rounded down to an integer value. See FT_FaceRec for the details.

-
height -

The height in 26.6 fractional pixels, rounded to an integer value. See FT_FaceRec for the details.

-
max_advance -

The maximum advance width in 26.6 fractional pixels, rounded to an integer value. See FT_FaceRec for the details.

-
- -

note

- -

The scaling values, if relevant, are determined first during a size changing operation. The remaining fields are then set by the driver. For scalable formats, they are usually set to scaled values of the corresponding fields in FT_FaceRec. Some values like ascender or descender are rounded for historical reasons; more precise values (for outline fonts) can be derived by scaling the corresponding FT_FaceRec values manually, with code similar to the following. -

  scaled_ascender = FT_MulFix( face->ascender,
-                               size_metrics->y_scale );
-

-

Note that due to glyph hinting and the selected rendering mode these values are usually not exact; consequently, they must be treated as unreliable with an error margin of at least one pixel!

-

Indeed, the only way to get the exact metrics is to render all glyphs. As this would be a definite performance hit, it is up to client applications to perform such computations.

-

The FT_Size_Metrics structure is valid for bitmap fonts also.

-

TrueType fonts with native bytecode hinting

-

All applications that handle TrueType fonts with native hinting must be aware that TTFs expect different rounding of vertical font dimensions. The application has to cater for this, especially if it wants to rely on a TTF's vertical data (for example, to properly align box characters vertically).

-

Only the application knows in advance that it is going to use native hinting for TTFs! FreeType, on the other hand, selects the hinting mode not at the time of creating an FT_Size object but much later, namely while calling FT_Load_Glyph.

-

Here is some pseudo code that illustrates a possible solution. -

  font_format = FT_Get_Font_Format( face );
-
-  if ( !strcmp( font_format, "TrueType" ) &&
-       do_native_bytecode_hinting         )
-  {
-    ascender  = ROUND( FT_MulFix( face->ascender,
-                                  size_metrics->y_scale ) );
-    descender = ROUND( FT_MulFix( face->descender,
-                                  size_metrics->y_scale ) );
-  }
-  else
-  {
-    ascender  = size_metrics->ascender;
-    descender = size_metrics->descender;
-  }
-
-  height      = size_metrics->height;
-  max_advance = size_metrics->max_advance;
-

-
- -

FT_GlyphSlotRec

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_GlyphSlotRec_
-  {
-    FT_Library        library;
-    FT_Face           face;
-    FT_GlyphSlot      next;
-    FT_UInt           glyph_index; /* new in 2.10; was reserved previously */
-    FT_Generic        generic;
-
-    FT_Glyph_Metrics  metrics;
-    FT_Fixed          linearHoriAdvance;
-    FT_Fixed          linearVertAdvance;
-    FT_Vector         advance;
-
-    FT_Glyph_Format   format;
-
-    FT_Bitmap         bitmap;
-    FT_Int            bitmap_left;
-    FT_Int            bitmap_top;
-
-    FT_Outline        outline;
-
-    FT_UInt           num_subglyphs;
-    FT_SubGlyph       subglyphs;
-
-    void*             control_data;
-    long              control_len;
-
-    FT_Pos            lsb_delta;
-    FT_Pos            rsb_delta;
-
-    void*             other;
-
-    FT_Slot_Internal  internal;
-
-  } FT_GlyphSlotRec;
-
-
- -

FreeType root glyph slot class structure. A glyph slot is a container where individual glyphs can be loaded, be they in outline or bitmap format.

-

fields

- - - - - - - - - - - - - - - - - - - - - - - -
library -

A handle to the FreeType library instance this slot belongs to.

-
face -

A handle to the parent face object.

-
next -

In some cases (like some font tools), several glyph slots per face object can be a good thing. As this is rare, the glyph slots are listed through a direct, single-linked list using its next field.

-
glyph_index -

[Since 2.10] The glyph index passed as an argument to FT_Load_Glyph while initializing the glyph slot.

-
generic -

A typeless pointer unused by the FreeType library or any of its drivers. It can be used by client applications to link their own data to each glyph slot object.

-
metrics -

The metrics of the last loaded glyph in the slot. The returned values depend on the last load flags (see the FT_Load_Glyph API function) and can be expressed either in 26.6 fractional pixels or font units.

-

Note that even when the glyph image is transformed, the metrics are not.

-
linearHoriAdvance -

The advance width of the unhinted glyph. Its value is expressed in 16.16 fractional pixels, unless FT_LOAD_LINEAR_DESIGN is set when loading the glyph. This field can be important to perform correct WYSIWYG layout. Only relevant for outline glyphs.

-
linearVertAdvance -

The advance height of the unhinted glyph. Its value is expressed in 16.16 fractional pixels, unless FT_LOAD_LINEAR_DESIGN is set when loading the glyph. This field can be important to perform correct WYSIWYG layout. Only relevant for outline glyphs.

-
advance -

This shorthand is, depending on FT_LOAD_IGNORE_TRANSFORM, the transformed (hinted) advance width for the glyph, in 26.6 fractional pixel format. As specified with FT_LOAD_VERTICAL_LAYOUT, it uses either the horiAdvance or the vertAdvance value of metrics field.

-
format -

This field indicates the format of the image contained in the glyph slot. Typically FT_GLYPH_FORMAT_BITMAP, FT_GLYPH_FORMAT_OUTLINE, or FT_GLYPH_FORMAT_COMPOSITE, but other values are possible.

-
bitmap -

This field is used as a bitmap descriptor. Note that the address and content of the bitmap buffer can change between calls of FT_Load_Glyph and a few other functions.

-
bitmap_left -

The bitmap's left bearing expressed in integer pixels.

-
bitmap_top -

The bitmap's top bearing expressed in integer pixels. This is the distance from the baseline to the top-most glyph scanline, upwards y coordinates being positive.

-
outline -

The outline descriptor for the current glyph image if its format is FT_GLYPH_FORMAT_OUTLINE. Once a glyph is loaded, outline can be transformed, distorted, emboldened, etc. However, it must not be freed.

-
num_subglyphs -

The number of subglyphs in a composite glyph. This field is only valid for the composite glyph format that should normally only be loaded with the FT_LOAD_NO_RECURSE flag.

-
subglyphs -

An array of subglyph descriptors for composite glyphs. There are num_subglyphs elements in there. Currently internal to FreeType.

-
control_data -

Certain font drivers can also return the control data for a given glyph image (e.g. TrueType bytecode, Type 1 charstrings, etc.). This field is a pointer to such data; it is currently internal to FreeType.

-
control_len -

This is the length in bytes of the control data. Currently internal to FreeType.

-
other -

Reserved.

-
lsb_delta -

The difference between hinted and unhinted left side bearing while auto-hinting is active. Zero otherwise.

-
rsb_delta -

The difference between hinted and unhinted right side bearing while auto-hinting is active. Zero otherwise.

-
- -

note

- -

If FT_Load_Glyph is called with default flags (see FT_LOAD_DEFAULT) the glyph image is loaded in the glyph slot in its native format (e.g., an outline glyph for TrueType and Type 1 formats). [Since 2.9] The prospective bitmap metrics are calculated according to FT_LOAD_TARGET_XXX and other flags even for the outline glyph, even if FT_LOAD_RENDER is not set.

-

This image can later be converted into a bitmap by calling FT_Render_Glyph. This function searches the current renderer for the native image's format, then invokes it.

-

The renderer is in charge of transforming the native image through the slot's face transformation fields, then converting it into a bitmap that is returned in slot->bitmap.

-

Note that slot->bitmap_left and slot->bitmap_top are also used to specify the position of the bitmap relative to the current pen position (e.g., coordinates (0,0) on the baseline). Of course, slot->format is also changed to FT_GLYPH_FORMAT_BITMAP.

-

Here is a small pseudo code fragment that shows how to use lsb_delta and rsb_delta to do fractional positioning of glyphs: -

  FT_GlyphSlot  slot     = face->glyph;
-  FT_Pos        origin_x = 0;
-
-
-  for all glyphs do
-    <load glyph with `FT_Load_Glyph'>
-
-    FT_Outline_Translate( slot->outline, origin_x & 63, 0 );
-
-    <save glyph image, or render glyph, or ...>
-
-    <compute kern between current and next glyph
-     and add it to `origin_x'>
-
-    origin_x += slot->advance.x;
-    origin_x += slot->lsb_delta - slot->rsb_delta;
-  endfor
-

-

Here is another small pseudo code fragment that shows how to use lsb_delta and rsb_delta to improve integer positioning of glyphs: -

  FT_GlyphSlot  slot           = face->glyph;
-  FT_Pos        origin_x       = 0;
-  FT_Pos        prev_rsb_delta = 0;
-
-
-  for all glyphs do
-    <compute kern between current and previous glyph
-     and add it to `origin_x'>
-
-    <load glyph with `FT_Load_Glyph'>
-
-    if ( prev_rsb_delta - slot->lsb_delta >  32 )
-      origin_x -= 64;
-    else if ( prev_rsb_delta - slot->lsb_delta < -31 )
-      origin_x += 64;
-
-    prev_rsb_delta = slot->rsb_delta;
-
-    <save glyph image, or render glyph, or ...>
-
-    origin_x += slot->advance.x;
-  endfor
-

-

If you use strong auto-hinting, you must apply these delta values! Otherwise you will experience far too large inter-glyph spacing at small rendering sizes in most cases. Note that it doesn't harm to use the above code for other hinting modes also, since the delta values are zero then.

-
- -

FT_Glyph_Metrics

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_Glyph_Metrics_
-  {
-    FT_Pos  width;
-    FT_Pos  height;
-
-    FT_Pos  horiBearingX;
-    FT_Pos  horiBearingY;
-    FT_Pos  horiAdvance;
-
-    FT_Pos  vertBearingX;
-    FT_Pos  vertBearingY;
-    FT_Pos  vertAdvance;
-
-  } FT_Glyph_Metrics;
-
-
- -

A structure to model the metrics of a single glyph. The values are expressed in 26.6 fractional pixel format; if the flag FT_LOAD_NO_SCALE has been used while loading the glyph, values are expressed in font units instead.

-

fields

- - - - - - - - - - -
width -

The glyph's width.

-
height -

The glyph's height.

-
horiBearingX -

Left side bearing for horizontal layout.

-
horiBearingY -

Top side bearing for horizontal layout.

-
horiAdvance -

Advance width for horizontal layout.

-
vertBearingX -

Left side bearing for vertical layout.

-
vertBearingY -

Top side bearing for vertical layout. Larger positive values mean further below the vertical glyph origin.

-
vertAdvance -

Advance height for vertical layout. Positive values mean the glyph has a positive advance downward.

-
- -

note

- -

If not disabled with FT_LOAD_NO_HINTING, the values represent dimensions of the hinted glyph (in case hinting is applicable).

-

Stroking a glyph with an outside border does not increase horiAdvance or vertAdvance; you have to manually adjust these values to account for the added width and height.

-

FreeType doesn't use the ‘VORG’ table data for CFF fonts because it doesn't have an interface to quickly retrieve the glyph height. The y coordinate of the vertical origin can be simply computed as vertBearingY + height after loading a glyph.

-
- -

FT_SubGlyph

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_SubGlyphRec_*  FT_SubGlyph;
-
-
- -

The subglyph structure is an internal object used to describe subglyphs (for example, in the case of composites).

-

note

- -

The subglyph implementation is not part of the high-level API, hence the forward structure declaration.

-

You can however retrieve subglyph information with FT_Get_SubGlyph_Info.

-
- -

FT_Bitmap_Size

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_Bitmap_Size_
-  {
-    FT_Short  height;
-    FT_Short  width;
-
-    FT_Pos    size;
-
-    FT_Pos    x_ppem;
-    FT_Pos    y_ppem;
-
-  } FT_Bitmap_Size;
-
-
- -

This structure models the metrics of a bitmap strike (i.e., a set of glyphs for a given point size and resolution) in a bitmap font. It is used for the available_sizes field of FT_Face.

-

fields

- - - - - - - -
height -

The vertical distance, in pixels, between two consecutive baselines. It is always positive.

-
width -

The average width, in pixels, of all glyphs in the strike.

-
size -

The nominal size of the strike in 26.6 fractional points. This field is not very useful.

-
x_ppem -

The horizontal ppem (nominal width) in 26.6 fractional pixels.

-
y_ppem -

The vertical ppem (nominal height) in 26.6 fractional pixels.

-
- -

note

- -

Windows FNT: The nominal size given in a FNT font is not reliable. If the driver finds it incorrect, it sets size to some calculated values, and x_ppem and y_ppem to the pixel width and height given in the font, respectively.

-

TrueType embedded bitmaps: size, width, and height values are not contained in the bitmap strike itself. They are computed from the global font parameters.

-
- -

FT_Init_FreeType

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Init_FreeType( FT_Library  *alibrary );
-
-
- -

Initialize a new FreeType library object. The set of modules that are registered by this function is determined at build time.

-

output

- - - -
alibrary -

A handle to a new library object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

In case you want to provide your own memory allocating routines, use FT_New_Library instead, followed by a call to FT_Add_Default_Modules (or a series of calls to FT_Add_Module) and FT_Set_Default_Properties.

-

See the documentation of FT_Library and FT_Face for multi-threading issues.

-

If you need reference-counting (cf. FT_Reference_Library), use FT_New_Library and FT_Done_Library.

-

If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the FREETYPE_PROPERTIES environment variable to control driver properties. See section ‘Driver properties’ for more.

-
- -

FT_Done_FreeType

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Done_FreeType( FT_Library  library );
-
-
- -

Destroy a given FreeType library object and all of its children, including resources, drivers, faces, sizes, etc.

-

input

- - - -
library -

A handle to the target library object.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_New_Face

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Face( FT_Library   library,
-               const char*  filepathname,
-               FT_Long      face_index,
-               FT_Face     *aface );
-
-
- -

Call FT_Open_Face to open a font by its pathname.

-

inout

- - - -
library -

A handle to the library resource.

-
- -

input

- - - - -
pathname -

A path to the font file.

-
face_index -

See FT_Open_Face for a detailed description of this parameter.

-
- -

output

- - - -
aface -

A handle to a new face object. If face_index is greater than or equal to zero, it must be non-NULL.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Use FT_Done_Face to destroy the created FT_Face object (along with its slot and sizes).

-
- -

FT_Done_Face

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Done_Face( FT_Face  face );
-
-
- -

Discard a given face object, as well as all of its child slots and sizes.

-

input

- - - -
face -

A handle to a target face object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

See the discussion of reference counters in the description of FT_Reference_Face.

-
- -

FT_Reference_Face

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Reference_Face( FT_Face  face );
-
-
- -

A counter gets initialized to 1 at the time an FT_Face structure is created. This function increments the counter. FT_Done_Face then only destroys a face if the counter is 1, otherwise it simply decrements the counter.

-

This function helps in managing life-cycles of structures that reference FT_Face objects.

-

input

- - - -
face -

A handle to a target face object.

-
- -

return

- -

FreeType error code. 0 means success.

-

since

- -

2.4.2

-
- -

FT_New_Memory_Face

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Memory_Face( FT_Library      library,
-                      const FT_Byte*  file_base,
-                      FT_Long         file_size,
-                      FT_Long         face_index,
-                      FT_Face        *aface );
-
-
- -

Call FT_Open_Face to open a font that has been loaded into memory.

-

inout

- - - -
library -

A handle to the library resource.

-
- -

input

- - - - - -
file_base -

A pointer to the beginning of the font data.

-
file_size -

The size of the memory chunk used by the font data.

-
face_index -

See FT_Open_Face for a detailed description of this parameter.

-
- -

output

- - - -
aface -

A handle to a new face object. If face_index is greater than or equal to zero, it must be non-NULL.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You must not deallocate the memory before calling FT_Done_Face.

-
- -

FT_Face_Properties

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Face_Properties( FT_Face        face,
-                      FT_UInt        num_properties,
-                      FT_Parameter*  properties );
-
-
- -

Set or override certain (library or module-wide) properties on a face-by-face basis. Useful for finer-grained control and avoiding locks on shared structures (threads can modify their own faces as they see fit).

-

Contrary to FT_Property_Set, this function uses FT_Parameter so that you can pass multiple properties to the target face in one call. Note that only a subset of the available properties can be controlled.

- -

Pass NULL as data in FT_Parameter for a given tag to reset the option and use the library or module default again.

-

input

- - - - - -
face -

A handle to the source face object.

-
num_properties -

The number of properties that follow.

-
properties -

A handle to an FT_Parameter array with num_properties elements.

-
- -

return

- -

FreeType error code. 0 means success.

-

example

- -

Here is an example that sets three properties. You must define FT_CONFIG_OPTION_SUBPIXEL_RENDERING to make the LCD filter examples work. -

  FT_Parameter         property1;
-  FT_Bool              darken_stems = 1;
-
-  FT_Parameter         property2;
-  FT_LcdFiveTapFilter  custom_weight =
-                         { 0x11, 0x44, 0x56, 0x44, 0x11 };
-
-  FT_Parameter         property3;
-  FT_Int32             random_seed = 314159265;
-
-  FT_Parameter         properties[3] = { property1,
-                                         property2,
-                                         property3 };
-
-
-  property1.tag  = FT_PARAM_TAG_STEM_DARKENING;
-  property1.data = &darken_stems;
-
-  property2.tag  = FT_PARAM_TAG_LCD_FILTER_WEIGHTS;
-  property2.data = custom_weight;
-
-  property3.tag  = FT_PARAM_TAG_RANDOM_SEED;
-  property3.data = &random_seed;
-
-  FT_Face_Properties( face, 3, properties );
-

-

The next example resets a single property to its default value. -

  FT_Parameter  property;
-
-
-  property.tag  = FT_PARAM_TAG_LCD_FILTER_WEIGHTS;
-  property.data = NULL;
-
-  FT_Face_Properties( face, 1, &property );
-

-

since

- -

2.8

-
- -

FT_Open_Face

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Open_Face( FT_Library           library,
-                const FT_Open_Args*  args,
-                FT_Long              face_index,
-                FT_Face             *aface );
-
-
- -

Create a face object from a given resource described by FT_Open_Args.

-

inout

- - - -
library -

A handle to the library resource.

-
- -

input

- - - - -
args -

A pointer to an FT_Open_Args structure that must be filled by the caller.

-
face_index -

This field holds two different values. Bits 0-15 are the index of the face in the font file (starting with value 0). Set it to 0 if there is only one face in the font file.

-

[Since 2.6.1] Bits 16-30 are relevant to GX and OpenType variation fonts only, specifying the named instance index for the current face index (starting with value 1; value 0 makes FreeType ignore named instances). For non-variation fonts, bits 16-30 are ignored. Assuming that you want to access the third named instance in face 4, face_index should be set to 0x00030004. If you want to access face 4 without variation handling, simply set face_index to value 4.

-

FT_Open_Face and its siblings can be used to quickly check whether the font format of a given font resource is supported by FreeType. In general, if the face_index argument is negative, the function's return value is 0 if the font format is recognized, or non-zero otherwise. The function allocates a more or less empty face handle in *aface (if aface isn't NULL); the only two useful fields in this special case are face->num_faces and face->style_flags. For any negative value of face_index, face->num_faces gives the number of faces within the font file. For the negative value ‘-(N+1)’ (with ‘N’ a non-negative 16-bit value), bits 16-30 in face->style_flags give the number of named instances in face ‘N’ if we have a variation font (or zero otherwise). After examination, the returned FT_Face structure should be deallocated with a call to FT_Done_Face.

-
- -

output

- - - -
aface -

A handle to a new face object. If face_index is greater than or equal to zero, it must be non-NULL.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Unlike FreeType 1.x, this function automatically creates a glyph slot for the face object that can be accessed directly through face->glyph.

-

Each new face object created with this function also owns a default FT_Size object, accessible as face->size.

-

One FT_Library instance can have multiple face objects, this is, FT_Open_Face and its siblings can be called multiple times using the same library argument.

-

See the discussion of reference counters in the description of FT_Reference_Face.

-

example

- -

To loop over all faces, use code similar to the following snippet (omitting the error handling). -

  ...
-  FT_Face  face;
-  FT_Long  i, num_faces;
-
-
-  error = FT_Open_Face( library, args, -1, &face );
-  if ( error ) { ... }
-
-  num_faces = face->num_faces;
-  FT_Done_Face( face );
-
-  for ( i = 0; i < num_faces; i++ )
-  {
-    ...
-    error = FT_Open_Face( library, args, i, &face );
-    ...
-    FT_Done_Face( face );
-    ...
-  }
-

-

To loop over all valid values for face_index, use something similar to the following snippet, again without error handling. The code accesses all faces immediately (thus only a single call of FT_Open_Face within the do-loop), with and without named instances. -

  ...
-  FT_Face  face;
-
-  FT_Long  num_faces     = 0;
-  FT_Long  num_instances = 0;
-
-  FT_Long  face_idx     = 0;
-  FT_Long  instance_idx = 0;
-
-
-  do
-  {
-    FT_Long  id = ( instance_idx << 16 ) + face_idx;
-
-
-    error = FT_Open_Face( library, args, id, &face );
-    if ( error ) { ... }
-
-    num_faces     = face->num_faces;
-    num_instances = face->style_flags >> 16;
-
-    ...
-
-    FT_Done_Face( face );
-
-    if ( instance_idx < num_instances )
-      instance_idx++;
-    else
-    {
-      face_idx++;
-      instance_idx = 0;
-    }
-
-  } while ( face_idx < num_faces )
-

-
- -

FT_Open_Args

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_Open_Args_
-  {
-    FT_UInt         flags;
-    const FT_Byte*  memory_base;
-    FT_Long         memory_size;
-    FT_String*      pathname;
-    FT_Stream       stream;
-    FT_Module       driver;
-    FT_Int          num_params;
-    FT_Parameter*   params;
-
-  } FT_Open_Args;
-
-
- -

A structure to indicate how to open a new font file or stream. A pointer to such a structure can be used as a parameter for the functions FT_Open_Face and FT_Attach_Stream.

-

fields

- - - - - - - - - - -
flags -

A set of bit flags indicating how to use the structure.

-
memory_base -

The first byte of the file in memory.

-
memory_size -

The size in bytes of the file in memory.

-
pathname -

A pointer to an 8-bit file pathname.

-
stream -

A handle to a source stream object.

-
driver -

This field is exclusively used by FT_Open_Face; it simply specifies the font driver to use for opening the face. If set to NULL, FreeType tries to load the face with each one of the drivers in its list.

-
num_params -

The number of extra parameters.

-
params -

Extra parameters passed to the font driver when opening a new face.

-
- -

note

- -

The stream type is determined by the contents of flags that are tested in the following order by FT_Open_Face:

-

If the FT_OPEN_MEMORY bit is set, assume that this is a memory file of memory_size bytes, located at memory_address. The data are not copied, and the client is responsible for releasing and destroying them after the corresponding call to FT_Done_Face.

-

Otherwise, if the FT_OPEN_STREAM bit is set, assume that a custom input stream stream is used.

-

Otherwise, if the FT_OPEN_PATHNAME bit is set, assume that this is a normal file and use pathname to open it.

-

If the FT_OPEN_DRIVER bit is set, FT_Open_Face only tries to open the file with the driver whose handler is in driver.

-

If the FT_OPEN_PARAMS bit is set, the parameters given by num_params and params is used. They are ignored otherwise.

-

Ideally, both the pathname and params fields should be tagged as ‘const’; this is missing for API backward compatibility. In other words, applications should treat them as read-only.

-
- -

FT_Parameter

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_Parameter_
-  {
-    FT_ULong    tag;
-    FT_Pointer  data;
-
-  } FT_Parameter;
-
-
- -

A simple structure to pass more or less generic parameters to FT_Open_Face and FT_Face_Properties.

-

fields

- - - - -
tag -

A four-byte identification tag.

-
data -

A pointer to the parameter data.

-
- -

note

- -

The ID and function of parameters are driver-specific. See section ‘Parameter Tags’ for more information.

-
- -

FT_Attach_File

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Attach_File( FT_Face      face,
-                  const char*  filepathname );
-
-
- -

Call FT_Attach_Stream to attach a file.

-

inout

- - - -
face -

The target face object.

-
- -

input

- - - -
filepathname -

The pathname.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Attach_Stream

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Attach_Stream( FT_Face        face,
-                    FT_Open_Args*  parameters );
-
-
- -

‘Attach’ data to a face object. Normally, this is used to read additional information for the face object. For example, you can attach an AFM file that comes with a Type 1 font to get the kerning values and other metrics.

-

inout

- - - -
face -

The target face object.

-
- -

input

- - - -
parameters -

A pointer to FT_Open_Args that must be filled by the caller.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The meaning of the ‘attach’ (i.e., what really happens when the new file is read) is not fixed by FreeType itself. It really depends on the font format (and thus the font driver).

-

Client applications are expected to know what they are doing when invoking this function. Most drivers simply do not implement file or stream attachments.

-
- -

FT_Set_Char_Size

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Char_Size( FT_Face     face,
-                    FT_F26Dot6  char_width,
-                    FT_F26Dot6  char_height,
-                    FT_UInt     horz_resolution,
-                    FT_UInt     vert_resolution );
-
-
- -

Call FT_Request_Size to request the nominal size (in points).

-

inout

- - - -
face -

A handle to a target face object.

-
- -

input

- - - - - - -
char_width -

The nominal width, in 26.6 fractional points.

-
char_height -

The nominal height, in 26.6 fractional points.

-
horz_resolution -

The horizontal resolution in dpi.

-
vert_resolution -

The vertical resolution in dpi.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

While this function allows fractional points as input values, the resulting ppem value for the given resolution is always rounded to the nearest integer.

-

If either the character width or height is zero, it is set equal to the other value.

-

If either the horizontal or vertical resolution is zero, it is set equal to the other value.

-

A character width or height smaller than 1pt is set to 1pt; if both resolution values are zero, they are set to 72dpi.

-

Don't use this function if you are using the FreeType cache API.

-
- -

FT_Set_Pixel_Sizes

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Pixel_Sizes( FT_Face  face,
-                      FT_UInt  pixel_width,
-                      FT_UInt  pixel_height );
-
-
- -

Call FT_Request_Size to request the nominal size (in pixels).

-

inout

- - - -
face -

A handle to the target face object.

-
- -

input

- - - - -
pixel_width -

The nominal width, in pixels.

-
pixel_height -

The nominal height, in pixels.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You should not rely on the resulting glyphs matching or being constrained to this pixel size. Refer to FT_Request_Size to understand how requested sizes relate to actual sizes.

-

Don't use this function if you are using the FreeType cache API.

-
- -

FT_Request_Size

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Request_Size( FT_Face          face,
-                   FT_Size_Request  req );
-
-
- -

Resize the scale of the active FT_Size object in a face.

-

inout

- - - -
face -

A handle to a target face object.

-
- -

input

- - - -
req -

A pointer to a FT_Size_RequestRec.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Although drivers may select the bitmap strike matching the request, you should not rely on this if you intend to select a particular bitmap strike. Use FT_Select_Size instead in that case.

-

The relation between the requested size and the resulting glyph size is dependent entirely on how the size is defined in the source face. The font designer chooses the final size of each glyph relative to this size. For more information refer to ‘https://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html’.

-

Contrary to FT_Set_Char_Size, this function doesn't have special code to normalize zero-valued widths, heights, or resolutions (which lead to errors in most cases).

-

Don't use this function if you are using the FreeType cache API.

-
- -

FT_Select_Size

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Select_Size( FT_Face  face,
-                  FT_Int   strike_index );
-
-
- -

Select a bitmap strike. To be more precise, this function sets the scaling factors of the active FT_Size object in a face so that bitmaps from this particular strike are taken by FT_Load_Glyph and friends.

-

inout

- - - -
face -

A handle to a target face object.

-
- -

input

- - - -
strike_index -

The index of the bitmap strike in the available_sizes field of FT_FaceRec structure.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

For bitmaps embedded in outline fonts it is common that only a subset of the available glyphs at a given ppem value is available. FreeType silently uses outlines if there is no bitmap for a given glyph index.

-

For GX and OpenType variation fonts, a bitmap strike makes sense only if the default instance is active (this is, no glyph variation takes place); otherwise, FreeType simply ignores bitmap strikes. The same is true for all named instances that are different from the default instance.

-

Don't use this function if you are using the FreeType cache API.

-
- -

FT_Size_Request_Type

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef enum  FT_Size_Request_Type_
-  {
-    FT_SIZE_REQUEST_TYPE_NOMINAL,
-    FT_SIZE_REQUEST_TYPE_REAL_DIM,
-    FT_SIZE_REQUEST_TYPE_BBOX,
-    FT_SIZE_REQUEST_TYPE_CELL,
-    FT_SIZE_REQUEST_TYPE_SCALES,
-
-    FT_SIZE_REQUEST_TYPE_MAX
-
-  } FT_Size_Request_Type;
-
-
- -

An enumeration type that lists the supported size request types, i.e., what input size (in font units) maps to the requested output size (in pixels, as computed from the arguments of FT_Size_Request).

-

values

- - - - - - - -
FT_SIZE_REQUEST_TYPE_NOMINAL -

The nominal size. The units_per_EM field of FT_FaceRec is used to determine both scaling values.

-

This is the standard scaling found in most applications. In particular, use this size request type for TrueType fonts if they provide optical scaling or something similar. Note, however, that units_per_EM is a rather abstract value which bears no relation to the actual size of the glyphs in a font.

-
FT_SIZE_REQUEST_TYPE_REAL_DIM -

The real dimension. The sum of the ascender and (minus of) the descender fields of FT_FaceRec is used to determine both scaling values.

-
FT_SIZE_REQUEST_TYPE_BBOX -

The font bounding box. The width and height of the bbox field of FT_FaceRec are used to determine the horizontal and vertical scaling value, respectively.

-
FT_SIZE_REQUEST_TYPE_CELL -

The max_advance_width field of FT_FaceRec is used to determine the horizontal scaling value; the vertical scaling value is determined the same way as FT_SIZE_REQUEST_TYPE_REAL_DIM does. Finally, both scaling values are set to the smaller one. This type is useful if you want to specify the font size for, say, a window of a given dimension and 80x24 cells.

-
FT_SIZE_REQUEST_TYPE_SCALES -

Specify the scaling values directly.

-
- -

note

- -

The above descriptions only apply to scalable formats. For bitmap formats, the behaviour is up to the driver.

-

See the note section of FT_Size_Metrics if you wonder how size requesting relates to scaling values.

-
- -

FT_Size_RequestRec

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_Size_RequestRec_
-  {
-    FT_Size_Request_Type  type;
-    FT_Long               width;
-    FT_Long               height;
-    FT_UInt               horiResolution;
-    FT_UInt               vertResolution;
-
-  } FT_Size_RequestRec;
-
-
- -

A structure to model a size request.

-

fields

- - - - - - - -
type -

See FT_Size_Request_Type.

-
width -

The desired width, given as a 26.6 fractional point value (with 72pt = 1in).

-
height -

The desired height, given as a 26.6 fractional point value (with 72pt = 1in).

-
horiResolution -

The horizontal resolution (dpi, i.e., pixels per inch). If set to zero, width is treated as a 26.6 fractional pixel value, which gets internally rounded to an integer.

-
vertResolution -

The vertical resolution (dpi, i.e., pixels per inch). If set to zero, height is treated as a 26.6 fractional pixel value, which gets internally rounded to an integer.

-
- -

note

- -

If width is zero, the horizontal scaling value is set equal to the vertical scaling value, and vice versa.

-

If type is FT_SIZE_REQUEST_TYPE_SCALES, width and height are interpreted directly as 16.16 fractional scaling values, without any further modification, and both horiResolution and vertResolution are ignored.

-
- -

FT_Size_Request

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_Size_RequestRec_  *FT_Size_Request;
-
-
- -

A handle to a size request structure.

-
- -

FT_Set_Transform

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( void )
-  FT_Set_Transform( FT_Face     face,
-                    FT_Matrix*  matrix,
-                    FT_Vector*  delta );
-
-
- -

Set the transformation that is applied to glyph images when they are loaded into a glyph slot through FT_Load_Glyph.

-

inout

- - - -
face -

A handle to the source face object.

-
- -

input

- - - - -
matrix -

A pointer to the transformation's 2x2 matrix. Use NULL for the identity matrix.

-
delta -

A pointer to the translation vector. Use NULL for the null vector.

-
- -

note

- -

The transformation is only applied to scalable image formats after the glyph has been loaded. It means that hinting is unaltered by the transformation and is performed on the character size given in the last call to FT_Set_Char_Size or FT_Set_Pixel_Sizes.

-

Note that this also transforms the face.glyph.advance field, but not the values in face.glyph.metrics.

-
- -

FT_Load_Glyph

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Load_Glyph( FT_Face   face,
-                 FT_UInt   glyph_index,
-                 FT_Int32  load_flags );
-
-
- -

Load a glyph into the glyph slot of a face object.

-

inout

- - - -
face -

A handle to the target face object where the glyph is loaded.

-
- -

input

- - - - -
glyph_index -

The index of the glyph in the font file. For CID-keyed fonts (either in PS or in CFF format) this argument specifies the CID value.

-
load_flags -

A flag indicating what to load for this glyph. The FT_LOAD_XXX constants can be used to control the glyph loading process (e.g., whether the outline should be scaled, whether to load bitmaps or not, whether to hint the outline, etc).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The loaded glyph may be transformed. See FT_Set_Transform for the details.

-

For subsetted CID-keyed fonts, FT_Err_Invalid_Argument is returned for invalid CID values (this is, for CID values that don't have a corresponding glyph in the font). See the discussion of the FT_FACE_FLAG_CID_KEYED flag for more details.

-

If you receive FT_Err_Glyph_Too_Big, try getting the glyph outline at EM size, then scale it manually and fill it as a graphics operation.

-
- -

FT_Get_Char_Index

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UInt )
-  FT_Get_Char_Index( FT_Face   face,
-                     FT_ULong  charcode );
-
-
- -

Return the glyph index of a given character code. This function uses the currently selected charmap to do the mapping.

-

input

- - - - -
face -

A handle to the source face object.

-
charcode -

The character code.

-
- -

return

- -

The glyph index. 0 means ‘undefined character code’.

-

note

- -

If you use FreeType to manipulate the contents of font files directly, be aware that the glyph index returned by this function doesn't always correspond to the internal indices used within the file. This is done to ensure that value 0 always corresponds to the ‘missing glyph’. If the first glyph is not named ‘.notdef’, then for Type 1 and Type 42 fonts, ‘.notdef’ will be moved into the glyph ID 0 position, and whatever was there will be moved to the position ‘.notdef’ had. For Type 1 fonts, if there is no ‘.notdef’ glyph at all, then one will be created at index 0 and whatever was there will be moved to the last index -- Type 42 fonts are considered invalid under this condition.

-
- -

FT_Get_First_Char

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_ULong )
-  FT_Get_First_Char( FT_Face   face,
-                     FT_UInt  *agindex );
-
-
- -

Return the first character code in the current charmap of a given face, together with its corresponding glyph index.

-

input

- - - -
face -

A handle to the source face object.

-
- -

output

- - - -
agindex -

Glyph index of first character code. 0 if charmap is empty.

-
- -

return

- -

The charmap's first character code.

-

note

- -

You should use this function together with FT_Get_Next_Char to parse all character codes available in a given charmap. The code should look like this: -

  FT_ULong  charcode;
-  FT_UInt   gindex;
-
-
-  charcode = FT_Get_First_Char( face, &gindex );
-  while ( gindex != 0 )
-  {
-    ... do something with (charcode,gindex) pair ...
-
-    charcode = FT_Get_Next_Char( face, charcode, &gindex );
-  }
-

-

Be aware that character codes can have values up to 0xFFFFFFFF; this might happen for non-Unicode or malformed cmaps. However, even with regular Unicode encoding, so-called ‘last resort fonts’ (using SFNT cmap format 13, see function FT_Get_CMap_Format) normally have entries for all Unicode characters up to 0x1FFFFF, which can cause a lot of iterations.

-

Note that *agindex is set to 0 if the charmap is empty. The result itself can be 0 in two cases: if the charmap is empty or if the value 0 is the first valid character code.

-
- -

FT_Get_Next_Char

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_ULong )
-  FT_Get_Next_Char( FT_Face    face,
-                    FT_ULong   char_code,
-                    FT_UInt   *agindex );
-
-
- -

Return the next character code in the current charmap of a given face following the value char_code, as well as the corresponding glyph index.

-

input

- - - - -
face -

A handle to the source face object.

-
char_code -

The starting character code.

-
- -

output

- - - -
agindex -

Glyph index of next character code. 0 if charmap is empty.

-
- -

return

- -

The charmap's next character code.

-

note

- -

You should use this function with FT_Get_First_Char to walk over all character codes available in a given charmap. See the note for that function for a simple code example.

-

Note that *agindex is set to 0 when there are no more codes in the charmap.

-
- -

FT_Get_Name_Index

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UInt )
-  FT_Get_Name_Index( FT_Face     face,
-                     FT_String*  glyph_name );
-
-
- -

Return the glyph index of a given glyph name.

-

input

- - - - -
face -

A handle to the source face object.

-
glyph_name -

The glyph name.

-
- -

return

- -

The glyph index. 0 means ‘undefined character code’.

-
- -

FT_Load_Char

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Load_Char( FT_Face   face,
-                FT_ULong  char_code,
-                FT_Int32  load_flags );
-
-
- -

Load a glyph into the glyph slot of a face object, accessed by its character code.

-

inout

- - - -
face -

A handle to a target face object where the glyph is loaded.

-
- -

input

- - - - -
char_code -

The glyph's character code, according to the current charmap used in the face.

-
load_flags -

A flag indicating what to load for this glyph. The FT_LOAD_XXX constants can be used to control the glyph loading process (e.g., whether the outline should be scaled, whether to load bitmaps or not, whether to hint the outline, etc).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function simply calls FT_Get_Char_Index and FT_Load_Glyph.

-

Many fonts contain glyphs that can't be loaded by this function since its glyph indices are not listed in any of the font's charmaps.

-

If no active cmap is set up (i.e., face->charmap is zero), the call to FT_Get_Char_Index is omitted, and the function behaves identically to FT_Load_Glyph.

-
- -

FT_LOAD_TARGET_MODE

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_LOAD_TARGET_MODE( x )  ( (FT_Render_Mode)( ( (x) >> 16 ) & 15 ) )
-
-
- -

Return the FT_Render_Mode corresponding to a given FT_LOAD_TARGET_XXX value.

-
- -

FT_Render_Glyph

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Render_Glyph( FT_GlyphSlot    slot,
-                   FT_Render_Mode  render_mode );
-
-
- -

Convert a given glyph image to a bitmap. It does so by inspecting the glyph image format, finding the relevant renderer, and invoking it.

-

inout

- - - -
slot -

A handle to the glyph slot containing the image to convert.

-
- -

input

- - - -
render_mode -

The render mode used to render the glyph image into a bitmap. See FT_Render_Mode for a list of possible values.

-

If FT_RENDER_MODE_NORMAL is used, a previous call of FT_Load_Glyph with flag FT_LOAD_COLOR makes FT_Render_Glyph provide a default blending of colored glyph layers associated with the current glyph slot (provided the font contains such layers) instead of rendering the glyph slot's outline. This is an experimental feature; see FT_LOAD_COLOR for more information.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

To get meaningful results, font scaling values must be set with functions like FT_Set_Char_Size before calling FT_Render_Glyph.

-

When FreeType outputs a bitmap of a glyph, it really outputs an alpha coverage map. If a pixel is completely covered by a filled-in outline, the bitmap contains 0xFF at that pixel, meaning that 0xFF/0xFF fraction of that pixel is covered, meaning the pixel is 100% black (or 0% bright). If a pixel is only 50% covered (value 0x80), the pixel is made 50% black (50% bright or a middle shade of grey). 0% covered means 0% black (100% bright or white).

-

On high-DPI screens like on smartphones and tablets, the pixels are so small that their chance of being completely covered and therefore completely black are fairly good. On the low-DPI screens, however, the situation is different. The pixels are too large for most of the details of a glyph and shades of gray are the norm rather than the exception.

-

This is relevant because all our screens have a second problem: they are not linear. 1 + 1 is not 2. Twice the value does not result in twice the brightness. When a pixel is only 50% covered, the coverage map says 50% black, and this translates to a pixel value of 128 when you use 8 bits per channel (0-255). However, this does not translate to 50% brightness for that pixel on our sRGB and gamma 2.2 screens. Due to their non-linearity, they dwell longer in the darks and only a pixel value of about 186 results in 50% brightness -- 128 ends up too dark on both bright and dark backgrounds. The net result is that dark text looks burnt-out, pixely and blotchy on bright background, bright text too frail on dark backgrounds, and colored text on colored background (for example, red on green) seems to have dark halos or ‘dirt’ around it. The situation is especially ugly for diagonal stems like in ‘w’ glyph shapes where the quality of FreeType's anti-aliasing depends on the correct display of grays. On high-DPI screens where smaller, fully black pixels reign supreme, this doesn't matter, but on our low-DPI screens with all the gray shades, it does. 0% and 100% brightness are the same things in linear and non-linear space, just all the shades in-between aren't.

-

The blending function for placing text over a background is -

  dst = alpha * src + (1 - alpha) * dst    ,
-

-

which is known as the OVER operator.

-

To correctly composite an antialiased pixel of a glyph onto a surface,

-
    -
  1. -

    take the foreground and background colors (e.g., in sRGB space) and apply gamma to get them in a linear space,

    -
    2. -
  2. -

    use OVER to blend the two linear colors using the glyph pixel as the alpha value (remember, the glyph bitmap is an alpha coverage bitmap), and

    -
    3. -
  3. -

    apply inverse gamma to the blended pixel and write it back to the image.

    -
    4. -
-

Internal testing at Adobe found that a target inverse gamma of 1.8 for step 3 gives good results across a wide range of displays with an sRGB gamma curve or a similar one.

-

This process can cost performance. There is an approximation that does not need to know about the background color; see https://bel.fi/alankila/lcd/ and https://bel.fi/alankila/lcd/alpcor.html for details.

-

ATTENTION: Linear blending is even more important when dealing with subpixel-rendered glyphs to prevent color-fringing! A subpixel-rendered glyph must first be filtered with a filter that gives equal weight to the three color primaries and does not exceed a sum of 0x100, see section ‘Subpixel Rendering’. Then the only difference to gray linear blending is that subpixel-rendered linear blending is done 3 times per pixel: red foreground subpixel to red background subpixel and so on for green and blue.

-
- -

FT_Render_Mode

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef enum  FT_Render_Mode_
-  {
-    FT_RENDER_MODE_NORMAL = 0,
-    FT_RENDER_MODE_LIGHT,
-    FT_RENDER_MODE_MONO,
-    FT_RENDER_MODE_LCD,
-    FT_RENDER_MODE_LCD_V,
-
-    FT_RENDER_MODE_MAX
-
-  } FT_Render_Mode;
-
-
-  /* these constants are deprecated; use the corresponding */
-  /* `FT_Render_Mode` values instead                       */
-#define ft_render_mode_normal  FT_RENDER_MODE_NORMAL
-#define ft_render_mode_mono    FT_RENDER_MODE_MONO
-
-
- -

Render modes supported by FreeType 2. Each mode corresponds to a specific type of scanline conversion performed on the outline.

-

For bitmap fonts and embedded bitmaps the bitmap->pixel_mode field in the FT_GlyphSlotRec structure gives the format of the returned bitmap.

-

All modes except FT_RENDER_MODE_MONO use 256 levels of opacity, indicating pixel coverage. Use linear alpha blending and gamma correction to correctly render non-monochrome glyph bitmaps onto a surface; see FT_Render_Glyph.

-

values

- - - - - - - -
FT_RENDER_MODE_NORMAL -

Default render mode; it corresponds to 8-bit anti-aliased bitmaps.

-
FT_RENDER_MODE_LIGHT -

This is equivalent to FT_RENDER_MODE_NORMAL. It is only defined as a separate value because render modes are also used indirectly to define hinting algorithm selectors. See FT_LOAD_TARGET_XXX for details.

-
FT_RENDER_MODE_MONO -

This mode corresponds to 1-bit bitmaps (with 2 levels of opacity).

-
FT_RENDER_MODE_LCD -

This mode corresponds to horizontal RGB and BGR subpixel displays like LCD screens. It produces 8-bit bitmaps that are 3 times the width of the original glyph outline in pixels, and which use the FT_PIXEL_MODE_LCD mode.

-
FT_RENDER_MODE_LCD_V -

This mode corresponds to vertical RGB and BGR subpixel displays (like PDA screens, rotated LCD displays, etc.). It produces 8-bit bitmaps that are 3 times the height of the original glyph outline in pixels and use the FT_PIXEL_MODE_LCD_V mode.

-
- -

note

- -

Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your ftoption.h, which enables patented ClearType-style rendering, the LCD-optimized glyph bitmaps should be filtered to reduce color fringes inherent to this technology. You can either set up LCD filtering with FT_Library_SetLcdFilter or FT_Face_Properties, or do the filtering yourself. The default FreeType LCD rendering technology does not require filtering.

-

The selected render mode only affects vector glyphs of a font. Embedded bitmaps often have a different pixel mode like FT_PIXEL_MODE_MONO. You can use FT_Bitmap_Convert to transform them into 8-bit pixmaps.

-
- -

FT_Get_Kerning

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Kerning( FT_Face     face,
-                  FT_UInt     left_glyph,
-                  FT_UInt     right_glyph,
-                  FT_UInt     kern_mode,
-                  FT_Vector  *akerning );
-
-
- -

Return the kerning vector between two glyphs of the same face.

-

input

- - - - - - -
face -

A handle to a source face object.

-
left_glyph -

The index of the left glyph in the kern pair.

-
right_glyph -

The index of the right glyph in the kern pair.

-
kern_mode -

See FT_Kerning_Mode for more information. Determines the scale and dimension of the returned kerning vector.

-
- -

output

- - - -
akerning -

The kerning vector. This is either in font units, fractional pixels (26.6 format), or pixels for scalable formats, and in pixels for fixed-sizes formats.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Only horizontal layouts (left-to-right & right-to-left) are supported by this method. Other layouts, or more sophisticated kernings, are out of the scope of this API function -- they can be implemented through format-specific interfaces.

-

Kerning for OpenType fonts implemented in a ‘GPOS’ table is not supported; use FT_HAS_KERNING to find out whether a font has data that can be extracted with FT_Get_Kerning.

-
- -

FT_Kerning_Mode

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef enum  FT_Kerning_Mode_
-  {
-    FT_KERNING_DEFAULT = 0,
-    FT_KERNING_UNFITTED,
-    FT_KERNING_UNSCALED
-
-  } FT_Kerning_Mode;
-
-
-  /* these constants are deprecated; use the corresponding */
-  /* `FT_Kerning_Mode` values instead                      */
-#define ft_kerning_default   FT_KERNING_DEFAULT
-#define ft_kerning_unfitted  FT_KERNING_UNFITTED
-#define ft_kerning_unscaled  FT_KERNING_UNSCALED
-
-
- -

An enumeration to specify the format of kerning values returned by FT_Get_Kerning.

-

values

- - - - - -
FT_KERNING_DEFAULT -

Return grid-fitted kerning distances in 26.6 fractional pixels.

-
FT_KERNING_UNFITTED -

Return un-grid-fitted kerning distances in 26.6 fractional pixels.

-
FT_KERNING_UNSCALED -

Return the kerning vector in original font units.

-
- -

note

- -

FT_KERNING_DEFAULT returns full pixel values; it also makes FreeType heuristically scale down kerning distances at small ppem values so that they don't become too big.

-

Both FT_KERNING_DEFAULT and FT_KERNING_UNFITTED use the current horizontal scaling factor (as set e.g. with FT_Set_Char_Size) to convert font units to pixels.

-
- -

FT_Get_Track_Kerning

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Track_Kerning( FT_Face    face,
-                        FT_Fixed   point_size,
-                        FT_Int     degree,
-                        FT_Fixed*  akerning );
-
-
- -

Return the track kerning for a given face object at a given size.

-

input

- - - - - -
face -

A handle to a source face object.

-
point_size -

The point size in 16.16 fractional points.

-
degree -

The degree of tightness. Increasingly negative values represent tighter track kerning, while increasingly positive values represent looser track kerning. Value zero means no track kerning.

-
- -

output

- - - -
akerning -

The kerning in 16.16 fractional points, to be uniformly applied between all glyphs.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Currently, only the Type 1 font driver supports track kerning, using data from AFM files (if attached with FT_Attach_File or FT_Attach_Stream).

-

Only very few AFM files come with track kerning data; please refer to Adobe's AFM specification for more details.

-
- -

FT_Get_Glyph_Name

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Glyph_Name( FT_Face     face,
-                     FT_UInt     glyph_index,
-                     FT_Pointer  buffer,
-                     FT_UInt     buffer_max );
-
-
- -

Retrieve the ASCII name of a given glyph in a face. This only works for those faces where FT_HAS_GLYPH_NAMES(face) returns 1.

-

input

- - - - - -
face -

A handle to a source face object.

-
glyph_index -

The glyph index.

-
buffer_max -

The maximum number of bytes available in the buffer.

-
- -

output

- - - -
buffer -

A pointer to a target buffer where the name is copied to.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

An error is returned if the face doesn't provide glyph names or if the glyph index is invalid. In all cases of failure, the first byte of buffer is set to 0 to indicate an empty name.

-

The glyph name is truncated to fit within the buffer if it is too long. The returned string is always zero-terminated.

-

Be aware that FreeType reorders glyph indices internally so that glyph index 0 always corresponds to the ‘missing glyph’ (called ‘.notdef’).

-

This function always returns an error if the config macro FT_CONFIG_OPTION_NO_GLYPH_NAMES is not defined in ftoption.h.

-
- -

FT_Get_Postscript_Name

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( const char* )
-  FT_Get_Postscript_Name( FT_Face  face );
-
-
- -

Retrieve the ASCII PostScript name of a given face, if available. This only works with PostScript, TrueType, and OpenType fonts.

-

input

- - - -
face -

A handle to the source face object.

-
- -

return

- -

A pointer to the face's PostScript name. NULL if unavailable.

-

note

- -

The returned pointer is owned by the face and is destroyed with it.

-

For variation fonts, this string changes if you select a different instance, and you have to call FT_Get_PostScript_Name again to retrieve it. FreeType follows Adobe TechNote #5902, ‘Generating PostScript Names for Fonts Using OpenType Font Variations’.

-

https://download.macromedia.com/pub/developer/opentype/tech-notes/5902.AdobePSNameGeneration.html

-

[Since 2.9] Special PostScript names for named instances are only returned if the named instance is set with FT_Set_Named_Instance (and the font has corresponding entries in its ‘fvar’ table). If FT_IS_VARIATION returns true, the algorithmically derived PostScript name is provided, not looking up special entries for named instances.

-
- -

FT_CharMapRec

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_CharMapRec_
-  {
-    FT_Face      face;
-    FT_Encoding  encoding;
-    FT_UShort    platform_id;
-    FT_UShort    encoding_id;
-
-  } FT_CharMapRec;
-
-
- -

The base charmap structure.

-

fields

- - - - - - -
face -

A handle to the parent face object.

-
encoding -

An FT_Encoding tag identifying the charmap. Use this with FT_Select_Charmap.

-
platform_id -

An ID number describing the platform for the following encoding ID. This comes directly from the TrueType specification and gets emulated for other formats.

-
encoding_id -

A platform-specific encoding number. This also comes from the TrueType specification and gets emulated similarly.

-
- -
- -

FT_Select_Charmap

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Select_Charmap( FT_Face      face,
-                     FT_Encoding  encoding );
-
-
- -

Select a given charmap by its encoding tag (as listed in freetype.h).

-

inout

- - - -
face -

A handle to the source face object.

-
- -

input

- - - -
encoding -

A handle to the selected encoding.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function returns an error if no charmap in the face corresponds to the encoding queried here.

-

Because many fonts contain more than a single cmap for Unicode encoding, this function has some special code to select the one that covers Unicode best (‘best’ in the sense that a UCS-4 cmap is preferred to a UCS-2 cmap). It is thus preferable to FT_Set_Charmap in this case.

-
- -

FT_Set_Charmap

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Charmap( FT_Face     face,
-                  FT_CharMap  charmap );
-
-
- -

Select a given charmap for character code to glyph index mapping.

-

inout

- - - -
face -

A handle to the source face object.

-
- -

input

- - - -
charmap -

A handle to the selected charmap.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function returns an error if the charmap is not part of the face (i.e., if it is not listed in the face->charmaps table).

-

It also fails if an OpenType type 14 charmap is selected (which doesn't map character codes to glyph indices at all).

-
- -

FT_Get_Charmap_Index

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Int )
-  FT_Get_Charmap_Index( FT_CharMap  charmap );
-
-
- -

Retrieve index of a given charmap.

-

input

- - - -
charmap -

A handle to a charmap.

-
- -

return

- -

The index into the array of character maps within the face to which charmap belongs. If an error occurs, -1 is returned.

-
- -

FT_Get_FSType_Flags

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UShort )
-  FT_Get_FSType_Flags( FT_Face  face );
-
-
- -

Return the fsType flags for a font.

-

input

- - - -
face -

A handle to the source face object.

-
- -

return

- -

The fsType flags, see FT_FSTYPE_XXX.

-

note

- -

Use this function rather than directly reading the fs_type field in the PS_FontInfoRec structure, which is only guaranteed to return the correct results for Type 1 fonts.

-

since

- -

2.3.8

-
- -

FT_Get_SubGlyph_Info

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_SubGlyph_Info( FT_GlyphSlot  glyph,
-                        FT_UInt       sub_index,
-                        FT_Int       *p_index,
-                        FT_UInt      *p_flags,
-                        FT_Int       *p_arg1,
-                        FT_Int       *p_arg2,
-                        FT_Matrix    *p_transform );
-
-
- -

Retrieve a description of a given subglyph. Only use it if glyph->format is FT_GLYPH_FORMAT_COMPOSITE; an error is returned otherwise.

-

input

- - - - -
glyph -

The source glyph slot.

-
sub_index -

The index of the subglyph. Must be less than glyph->num_subglyphs.

-
- -

output

- - - - - - - -
p_index -

The glyph index of the subglyph.

-
p_flags -

The subglyph flags, see FT_SUBGLYPH_FLAG_XXX.

-
p_arg1 -

The subglyph's first argument (if any).

-
p_arg2 -

The subglyph's second argument (if any).

-
p_transform -

The subglyph transformation (if any).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The values of *p_arg1, *p_arg2, and *p_transform must be interpreted depending on the flags returned in *p_flags. See the OpenType specification for details.

-

https://docs.microsoft.com/en-us/typography/opentype/spec/glyf#composite-glyph-description

-
- -

FT_Face_Internal

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_Face_InternalRec_*  FT_Face_Internal;
-
-
- -

An opaque handle to an FT_Face_InternalRec structure that models the private data of a given FT_Face object.

-

This structure might change between releases of FreeType 2 and is not generally available to client applications.

-
- -

FT_Size_Internal

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_Size_InternalRec_*  FT_Size_Internal;
-
-
- -

An opaque handle to an FT_Size_InternalRec structure, used to model private data of a given FT_Size object.

-
- -

FT_Slot_Internal

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_Slot_InternalRec_*  FT_Slot_Internal;
-
-
- -

An opaque handle to an FT_Slot_InternalRec structure, used to model private data of a given FT_GlyphSlot object.

-
- -

FT_FACE_FLAG_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_FACE_FLAG_SCALABLE          ( 1L <<  0 )
-#define FT_FACE_FLAG_FIXED_SIZES       ( 1L <<  1 )
-#define FT_FACE_FLAG_FIXED_WIDTH       ( 1L <<  2 )
-#define FT_FACE_FLAG_SFNT              ( 1L <<  3 )
-#define FT_FACE_FLAG_HORIZONTAL        ( 1L <<  4 )
-#define FT_FACE_FLAG_VERTICAL          ( 1L <<  5 )
-#define FT_FACE_FLAG_KERNING           ( 1L <<  6 )
-#define FT_FACE_FLAG_FAST_GLYPHS       ( 1L <<  7 )
-#define FT_FACE_FLAG_MULTIPLE_MASTERS  ( 1L <<  8 )
-#define FT_FACE_FLAG_GLYPH_NAMES       ( 1L <<  9 )
-#define FT_FACE_FLAG_EXTERNAL_STREAM   ( 1L << 10 )
-#define FT_FACE_FLAG_HINTER            ( 1L << 11 )
-#define FT_FACE_FLAG_CID_KEYED         ( 1L << 12 )
-#define FT_FACE_FLAG_TRICKY            ( 1L << 13 )
-#define FT_FACE_FLAG_COLOR             ( 1L << 14 )
-#define FT_FACE_FLAG_VARIATION         ( 1L << 15 )
-
-
- -

A list of bit flags used in the face_flags field of the FT_FaceRec structure. They inform client applications of properties of the corresponding face.

-

values

- - - - - - - - - - - - - - - - - - -
FT_FACE_FLAG_SCALABLE -

The face contains outline glyphs. Note that a face can contain bitmap strikes also, i.e., a face can have both this flag and FT_FACE_FLAG_FIXED_SIZES set.

-
FT_FACE_FLAG_FIXED_SIZES -

The face contains bitmap strikes. See also the num_fixed_sizes and available_sizes fields of FT_FaceRec.

-
FT_FACE_FLAG_FIXED_WIDTH -

The face contains fixed-width characters (like Courier, Lucida, MonoType, etc.).

-
FT_FACE_FLAG_SFNT -

The face uses the SFNT storage scheme. For now, this means TrueType and OpenType.

-
FT_FACE_FLAG_HORIZONTAL -

The face contains horizontal glyph metrics. This should be set for all common formats.

-
FT_FACE_FLAG_VERTICAL -

The face contains vertical glyph metrics. This is only available in some formats, not all of them.

-
FT_FACE_FLAG_KERNING -

The face contains kerning information. If set, the kerning distance can be retrieved using the function FT_Get_Kerning. Otherwise the function always return the vector (0,0). Note that FreeType doesn't handle kerning data from the SFNT ‘GPOS’ table (as present in many OpenType fonts).

-
FT_FACE_FLAG_FAST_GLYPHS -

THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT.

-
FT_FACE_FLAG_MULTIPLE_MASTERS -

The face contains multiple masters and is capable of interpolating between them. Supported formats are Adobe MM, TrueType GX, and OpenType variation fonts.

-

See section ‘Multiple Masters’ for API details.

-
FT_FACE_FLAG_GLYPH_NAMES -

The face contains glyph names, which can be retrieved using FT_Get_Glyph_Name. Note that some TrueType fonts contain broken glyph name tables. Use the function FT_Has_PS_Glyph_Names when needed.

-
FT_FACE_FLAG_EXTERNAL_STREAM -

Used internally by FreeType to indicate that a face's stream was provided by the client application and should not be destroyed when FT_Done_Face is called. Don't read or test this flag.

-
FT_FACE_FLAG_HINTER -

The font driver has a hinting machine of its own. For example, with TrueType fonts, it makes sense to use data from the SFNT ‘gasp’ table only if the native TrueType hinting engine (with the bytecode interpreter) is available and active.

-
FT_FACE_FLAG_CID_KEYED -

The face is CID-keyed. In that case, the face is not accessed by glyph indices but by CID values. For subsetted CID-keyed fonts this has the consequence that not all index values are a valid argument to FT_Load_Glyph. Only the CID values for which corresponding glyphs in the subsetted font exist make FT_Load_Glyph return successfully; in all other cases you get an FT_Err_Invalid_Argument error.

-

Note that CID-keyed fonts that are in an SFNT wrapper (this is, all OpenType/CFF fonts) don't have this flag set since the glyphs are accessed in the normal way (using contiguous indices); the ‘CID-ness’ isn't visible to the application.

-
FT_FACE_FLAG_TRICKY -

The face is ‘tricky’, this is, it always needs the font format's native hinting engine to get a reasonable result. A typical example is the old Chinese font mingli.ttf (but not mingliu.ttc) that uses TrueType bytecode instructions to move and scale all of its subglyphs.

-

It is not possible to auto-hint such fonts using FT_LOAD_FORCE_AUTOHINT; it will also ignore FT_LOAD_NO_HINTING. You have to set both FT_LOAD_NO_HINTING and FT_LOAD_NO_AUTOHINT to really disable hinting; however, you probably never want this except for demonstration purposes.

-

Currently, there are about a dozen TrueType fonts in the list of tricky fonts; they are hard-coded in file ttobjs.c.

-
FT_FACE_FLAG_COLOR -

[Since 2.5.1] The face has color glyph tables. See FT_LOAD_COLOR for more information.

-
FT_FACE_FLAG_VARIATION -

[Since 2.9] Set if the current face (or named instance) has been altered with FT_Set_MM_Design_Coordinates, FT_Set_Var_Design_Coordinates, or FT_Set_Var_Blend_Coordinates. This flag is unset by a call to FT_Set_Named_Instance.

-
- -
- -

FT_STYLE_FLAG_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_STYLE_FLAG_ITALIC  ( 1 << 0 )
-#define FT_STYLE_FLAG_BOLD    ( 1 << 1 )
-
-
- -

A list of bit flags to indicate the style of a given face. These are used in the style_flags field of FT_FaceRec.

-

values

- - - - -
FT_STYLE_FLAG_ITALIC -

The face style is italic or oblique.

-
FT_STYLE_FLAG_BOLD -

The face is bold.

-
- -

note

- -

The style information as provided by FreeType is very basic. More details are beyond the scope and should be done on a higher level (for example, by analyzing various fields of the ‘OS/2’ table in SFNT based fonts).

-
- -

FT_OPEN_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_OPEN_MEMORY    0x1
-#define FT_OPEN_STREAM    0x2
-#define FT_OPEN_PATHNAME  0x4
-#define FT_OPEN_DRIVER    0x8
-#define FT_OPEN_PARAMS    0x10
-
-  /* these constants are deprecated; use the corresponding `FT_OPEN_XXX` */
-  /* values instead                                                      */
-#define ft_open_memory    FT_OPEN_MEMORY
-#define ft_open_stream    FT_OPEN_STREAM
-#define ft_open_pathname  FT_OPEN_PATHNAME
-#define ft_open_driver    FT_OPEN_DRIVER
-#define ft_open_params    FT_OPEN_PARAMS
-
-
- -

A list of bit field constants used within the flags field of the FT_Open_Args structure.

-

values

- - - - - - - -
FT_OPEN_MEMORY -

This is a memory-based stream.

-
FT_OPEN_STREAM -

Copy the stream from the stream field.

-
FT_OPEN_PATHNAME -

Create a new input stream from a C path name.

-
FT_OPEN_DRIVER -

Use the driver field.

-
FT_OPEN_PARAMS -

Use the num_params and params fields.

-
- -

note

- -

The FT_OPEN_MEMORY, FT_OPEN_STREAM, and FT_OPEN_PATHNAME flags are mutually exclusive.

-
- -

FT_LOAD_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_LOAD_DEFAULT                      0x0
-#define FT_LOAD_NO_SCALE                     ( 1L << 0 )
-#define FT_LOAD_NO_HINTING                   ( 1L << 1 )
-#define FT_LOAD_RENDER                       ( 1L << 2 )
-#define FT_LOAD_NO_BITMAP                    ( 1L << 3 )
-#define FT_LOAD_VERTICAL_LAYOUT              ( 1L << 4 )
-#define FT_LOAD_FORCE_AUTOHINT               ( 1L << 5 )
-#define FT_LOAD_CROP_BITMAP                  ( 1L << 6 )
-#define FT_LOAD_PEDANTIC                     ( 1L << 7 )
-#define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH  ( 1L << 9 )
-#define FT_LOAD_NO_RECURSE                   ( 1L << 10 )
-#define FT_LOAD_IGNORE_TRANSFORM             ( 1L << 11 )
-#define FT_LOAD_MONOCHROME                   ( 1L << 12 )
-#define FT_LOAD_LINEAR_DESIGN                ( 1L << 13 )
-#define FT_LOAD_NO_AUTOHINT                  ( 1L << 15 )
-  /* Bits 16-19 are used by `FT_LOAD_TARGET_` */
-#define FT_LOAD_COLOR                        ( 1L << 20 )
-#define FT_LOAD_COMPUTE_METRICS              ( 1L << 21 )
-#define FT_LOAD_BITMAP_METRICS_ONLY          ( 1L << 22 )
-
-
- -

A list of bit field constants for FT_Load_Glyph to indicate what kind of operations to perform during glyph loading.

-

values

- - - - - - - - - - - - - - - - - - - - -
FT_LOAD_DEFAULT -

Corresponding to 0, this value is used as the default glyph load operation. In this case, the following happens:

-
    -

  1. FreeType looks for a bitmap for the glyph corresponding to the face's current size. If one is found, the function returns. The bitmap data can be accessed from the glyph slot (see note below).

    -
    2. -

  2. If no embedded bitmap is searched for or found, FreeType looks for a scalable outline. If one is found, it is loaded from the font file, scaled to device pixels, then ‘hinted’ to the pixel grid in order to optimize it. The outline data can be accessed from the glyph slot (see note below).

    -
    3. -
-

Note that by default the glyph loader doesn't render outlines into bitmaps. The following flags are used to modify this default behaviour to more specific and useful cases.

-
FT_LOAD_NO_SCALE -

Don't scale the loaded outline glyph but keep it in font units.

-

This flag implies FT_LOAD_NO_HINTING and FT_LOAD_NO_BITMAP, and unsets FT_LOAD_RENDER.

-

If the font is ‘tricky’ (see FT_FACE_FLAG_TRICKY for more), using FT_LOAD_NO_SCALE usually yields meaningless outlines because the subglyphs must be scaled and positioned with hinting instructions. This can be solved by loading the font without FT_LOAD_NO_SCALE and setting the character size to font->units_per_EM.

-
FT_LOAD_NO_HINTING -

Disable hinting. This generally generates ‘blurrier’ bitmap glyphs when the glyph are rendered in any of the anti-aliased modes. See also the note below.

-

This flag is implied by FT_LOAD_NO_SCALE.

-
FT_LOAD_RENDER -

Call FT_Render_Glyph after the glyph is loaded. By default, the glyph is rendered in FT_RENDER_MODE_NORMAL mode. This can be overridden by FT_LOAD_TARGET_XXX or FT_LOAD_MONOCHROME.

-

This flag is unset by FT_LOAD_NO_SCALE.

-
FT_LOAD_NO_BITMAP -

Ignore bitmap strikes when loading. Bitmap-only fonts ignore this flag.

-

FT_LOAD_NO_SCALE always sets this flag.

-
FT_LOAD_VERTICAL_LAYOUT -

Load the glyph for vertical text layout. In particular, the advance value in the FT_GlyphSlotRec structure is set to the vertAdvance value of the metrics field.

-

In case FT_HAS_VERTICAL doesn't return true, you shouldn't use this flag currently. Reason is that in this case vertical metrics get synthesized, and those values are not always consistent across various font formats.

-
FT_LOAD_FORCE_AUTOHINT -

Prefer the auto-hinter over the font's native hinter. See also the note below.

-
FT_LOAD_PEDANTIC -

Make the font driver perform pedantic verifications during glyph loading and hinting. This is mostly used to detect broken glyphs in fonts. By default, FreeType tries to handle broken fonts also.

-

In particular, errors from the TrueType bytecode engine are not passed to the application if this flag is not set; this might result in partially hinted or distorted glyphs in case a glyph's bytecode is buggy.

-
FT_LOAD_NO_RECURSE -

Don't load composite glyphs recursively. Instead, the font driver fills the num_subglyph and subglyphs values of the glyph slot; it also sets glyph->format to FT_GLYPH_FORMAT_COMPOSITE. The description of subglyphs can then be accessed with FT_Get_SubGlyph_Info.

-

Don't use this flag for retrieving metrics information since some font drivers only return rudimentary data.

-

This flag implies FT_LOAD_NO_SCALE and FT_LOAD_IGNORE_TRANSFORM.

-
FT_LOAD_IGNORE_TRANSFORM -

Ignore the transform matrix set by FT_Set_Transform.

-
FT_LOAD_MONOCHROME -

This flag is used with FT_LOAD_RENDER to indicate that you want to render an outline glyph to a 1-bit monochrome bitmap glyph, with 8 pixels packed into each byte of the bitmap data.

-

Note that this has no effect on the hinting algorithm used. You should rather use FT_LOAD_TARGET_MONO so that the monochrome-optimized hinting algorithm is used.

-
FT_LOAD_LINEAR_DESIGN -

Keep linearHoriAdvance and linearVertAdvance fields of FT_GlyphSlotRec in font units. See FT_GlyphSlotRec for details.

-
FT_LOAD_NO_AUTOHINT -

Disable the auto-hinter. See also the note below.

-
FT_LOAD_COLOR -

Load colored glyphs. There are slight differences depending on the font format.

-

[Since 2.5] Load embedded color bitmap images. The resulting color bitmaps, if available, will have the FT_PIXEL_MODE_BGRA format, with pre-multiplied color channels. If the flag is not set and color bitmaps are found, they are converted to 256-level gray bitmaps, using the FT_PIXEL_MODE_GRAY format.

-

[Since 2.10, experimental] If the glyph index contains an entry in the face's ‘COLR’ table with a ‘CPAL’ palette table (as defined in the OpenType specification), make FT_Render_Glyph provide a default blending of the color glyph layers associated with the glyph index, using the same bitmap format as embedded color bitmap images. This is mainly for convenience; for full control of color layers use FT_Get_Color_Glyph_Layer and FreeType's color functions like FT_Palette_Select instead of setting FT_LOAD_COLOR for rendering so that the client application can handle blending by itself.

-
FT_LOAD_COMPUTE_METRICS -

[Since 2.6.1] Compute glyph metrics from the glyph data, without the use of bundled metrics tables (for example, the ‘hdmx’ table in TrueType fonts). This flag is mainly used by font validating or font editing applications, which need to ignore, verify, or edit those tables.

-

Currently, this flag is only implemented for TrueType fonts.

-
FT_LOAD_BITMAP_METRICS_ONLY -

[Since 2.7.1] Request loading of the metrics and bitmap image information of a (possibly embedded) bitmap glyph without allocating or copying the bitmap image data itself. No effect if the target glyph is not a bitmap image.

-

This flag unsets FT_LOAD_RENDER.

-
FT_LOAD_CROP_BITMAP -

Ignored. Deprecated.

-
FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH -

Ignored. Deprecated.

-
- -

note

- -

By default, hinting is enabled and the font's native hinter (see FT_FACE_FLAG_HINTER) is preferred over the auto-hinter. You can disable hinting by setting FT_LOAD_NO_HINTING or change the precedence by setting FT_LOAD_FORCE_AUTOHINT. You can also set FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be used at all.

-

See the description of FT_FACE_FLAG_TRICKY for a special exception (affecting only a handful of Asian fonts).

-

Besides deciding which hinter to use, you can also decide which hinting algorithm to use. See FT_LOAD_TARGET_XXX for details.

-

Note that the auto-hinter needs a valid Unicode cmap (either a native one or synthesized by FreeType) for producing correct results. If a font provides an incorrect mapping (for example, assigning the character code U+005A, LATIN CAPITAL LETTER Z, to a glyph depicting a mathematical integral sign), the auto-hinter might produce useless results.

-
- -

FT_LOAD_TARGET_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_LOAD_TARGET_( x )   ( (FT_Int32)( (x) & 15 ) << 16 )
-
-#define FT_LOAD_TARGET_NORMAL  FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL )
-#define FT_LOAD_TARGET_LIGHT   FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT  )
-#define FT_LOAD_TARGET_MONO    FT_LOAD_TARGET_( FT_RENDER_MODE_MONO   )
-#define FT_LOAD_TARGET_LCD     FT_LOAD_TARGET_( FT_RENDER_MODE_LCD    )
-#define FT_LOAD_TARGET_LCD_V   FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V  )
-
-
- -

A list of values to select a specific hinting algorithm for the hinter. You should OR one of these values to your load_flags when calling FT_Load_Glyph.

-

Note that a font's native hinters may ignore the hinting algorithm you have specified (e.g., the TrueType bytecode interpreter). You can set FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used.

-

values

- - - - - - - -
FT_LOAD_TARGET_NORMAL -

The default hinting algorithm, optimized for standard gray-level rendering. For monochrome output, use FT_LOAD_TARGET_MONO instead.

-
FT_LOAD_TARGET_LIGHT -

A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by FreeType's new CFF engine or Microsoft's ClearType font renderer. This preserves inter-glyph spacing in horizontal text. The snapping is done either by the native font driver, if the driver itself and the font support it, or by the auto-hinter.

-

Advance widths are rounded to integer values; however, using the lsb_delta and rsb_delta fields of FT_GlyphSlotRec, it is possible to get fractional advance widths for subpixel positioning (which is recommended to use).

-

If configuration option AF_CONFIG_OPTION_TT_SIZE_METRICS is active, TrueType-like metrics are used to make this mode behave similarly as in unpatched FreeType versions between 2.4.6 and 2.7.1 (inclusive).

-
FT_LOAD_TARGET_MONO -

Strong hinting algorithm that should only be used for monochrome output. The result is probably unpleasant if the glyph is rendered in non-monochrome modes.

-

Note that for outline fonts only the TrueType font driver has proper monochrome hinting support, provided the TTFs contain hints for B/W rendering (which most fonts no longer provide). If these conditions are not met it is very likely that you get ugly results at smaller sizes.

-
FT_LOAD_TARGET_LCD -

A variant of FT_LOAD_TARGET_LIGHT optimized for horizontally decimated LCD displays.

-
FT_LOAD_TARGET_LCD_V -

A variant of FT_LOAD_TARGET_NORMAL optimized for vertically decimated LCD displays.

-
- -

note

- -

You should use only one of the FT_LOAD_TARGET_XXX values in your load_flags. They can't be ORed.

-

If FT_LOAD_RENDER is also set, the glyph is rendered in the corresponding mode (i.e., the mode that matches the used algorithm best). An exception is FT_LOAD_TARGET_MONO since it implies FT_LOAD_MONOCHROME.

-

You can use a hinting algorithm that doesn't correspond to the same rendering mode. As an example, it is possible to use the ‘light’ hinting algorithm and have the results rendered in horizontal LCD pixel mode, with code like -

  FT_Load_Glyph( face, glyph_index,
-                 load_flags | FT_LOAD_TARGET_LIGHT );
-
-  FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD );
-

-

In general, you should stick with one rendering mode. For example, switching between FT_LOAD_TARGET_NORMAL and FT_LOAD_TARGET_MONO enforces a lot of recomputation for TrueType fonts, which is slow. Another reason is caching: Selecting a different mode usually causes changes in both the outlines and the rasterized bitmaps; it is thus necessary to empty the cache after a mode switch to avoid false hits.

-
- -

FT_SUBGLYPH_FLAG_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS          1
-#define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES      2
-#define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID        4
-#define FT_SUBGLYPH_FLAG_SCALE                   8
-#define FT_SUBGLYPH_FLAG_XY_SCALE             0x40
-#define FT_SUBGLYPH_FLAG_2X2                  0x80
-#define FT_SUBGLYPH_FLAG_USE_MY_METRICS      0x200
-
-
- -

A list of constants describing subglyphs. Please refer to the ‘glyf’ table description in the OpenType specification for the meaning of the various flags (which get synthesized for non-OpenType subglyphs).

-

https://docs.microsoft.com/en-us/typography/opentype/spec/glyf#composite-glyph-description

-

values

- - - - - - - - - -
FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS - -
FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES - -
FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID - -
FT_SUBGLYPH_FLAG_SCALE - -
FT_SUBGLYPH_FLAG_XY_SCALE - -
FT_SUBGLYPH_FLAG_2X2 - -
FT_SUBGLYPH_FLAG_USE_MY_METRICS - -
- -
- -

FT_FSTYPE_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_FSTYPE_INSTALLABLE_EMBEDDING         0x0000
-#define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING  0x0002
-#define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING   0x0004
-#define FT_FSTYPE_EDITABLE_EMBEDDING            0x0008
-#define FT_FSTYPE_NO_SUBSETTING                 0x0100
-#define FT_FSTYPE_BITMAP_EMBEDDING_ONLY         0x0200
-
-
- -

A list of bit flags used in the fsType field of the OS/2 table in a TrueType or OpenType font and the FSType entry in a PostScript font. These bit flags are returned by FT_Get_FSType_Flags; they inform client applications of embedding and subsetting restrictions associated with a font.

-

See https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf for more details.

-

values

- - - - - - - - -
FT_FSTYPE_INSTALLABLE_EMBEDDING -

Fonts with no fsType bit set may be embedded and permanently installed on the remote system by an application.

-
FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING -

Fonts that have only this bit set must not be modified, embedded or exchanged in any manner without first obtaining permission of the font software copyright owner.

-
FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING -

The font may be embedded and temporarily loaded on the remote system. Documents containing Preview & Print fonts must be opened ‘read-only’; no edits can be applied to the document.

-
FT_FSTYPE_EDITABLE_EMBEDDING -

The font may be embedded but must only be installed temporarily on other systems. In contrast to Preview & Print fonts, documents containing editable fonts may be opened for reading, editing is permitted, and changes may be saved.

-
FT_FSTYPE_NO_SUBSETTING -

The font may not be subsetted prior to embedding.

-
FT_FSTYPE_BITMAP_EMBEDDING_ONLY -

Only bitmaps contained in the font may be embedded; no outline data may be embedded. If there are no bitmaps available in the font, then the font is unembeddable.

-
- -

note

- -

The flags are ORed together, thus more than a single value can be returned.

-

While the fsType flags can indicate that a font may be embedded, a license with the font vendor may be separately required to use the font in this way.

-
- -

FT_HAS_FAST_GLYPHS

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FT_HAS_FAST_GLYPHS( face )  0
-
-
- -

Deprecated.

-
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FreeType » Docs » Core API » Basic Data Types

-
-

Basic Data Types

-

Synopsis

-

This section contains the basic data types defined by FreeType 2, ranging from simple scalar types to bitmap descriptors. More font-specific structures are defined in a different section.

-

FT_Byte

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef unsigned char  FT_Byte;
-
-
- -

A simple typedef for the unsigned char type.

-
- -

FT_Bytes

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef const FT_Byte*  FT_Bytes;
-
-
- -

A typedef for constant memory areas.

-
- -

FT_Char

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed char  FT_Char;
-
-
- -

A simple typedef for the signed char type.

-
- -

FT_Int

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed int  FT_Int;
-
-
- -

A typedef for the int type.

-
- -

FT_UInt

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef unsigned int  FT_UInt;
-
-
- -

A typedef for the unsigned int type.

-
- -

FT_Int16

-

Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).

-
-
-  typedef signed short  FT_Int16;
-
-
- -

A typedef for a 16bit signed integer type.

-
- -

FT_UInt16

-

Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).

-
-
-  typedef unsigned short  FT_UInt16;
-
-
- -

A typedef for a 16bit unsigned integer type.

-
- -

FT_Int32

-

Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).

-
-
-  typedef signed XXX  FT_Int32;
-
-
- -

A typedef for a 32bit signed integer type. The size depends on the configuration.

-
- -

FT_UInt32

-

Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).

-
-
-  typedef unsigned XXX  FT_UInt32;
-
-
- -
- -

FT_Int64

-

Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).

-
-
-  typedef signed XXX  FT_Int64;
-
-
- -
- -

FT_UInt64

-

Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h).

-
-
-  typedef unsigned XXX  FT_UInt64;
-
-
- -
- -

FT_Short

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed short  FT_Short;
-
-
- -

A typedef for signed short.

-
- -

FT_UShort

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef unsigned short  FT_UShort;
-
-
- -

A typedef for unsigned short.

-
- -

FT_Long

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed long  FT_Long;
-
-
- -

A typedef for signed long.

-
- -

FT_ULong

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef unsigned long  FT_ULong;
-
-
- -

A typedef for unsigned long.

-
- -

FT_Bool

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef unsigned char  FT_Bool;
-
-
- -

A typedef of unsigned char, used for simple booleans. As usual, values 1 and 0 represent true and false, respectively.

-
- -

FT_Offset

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef size_t  FT_Offset;
-
-
- -

This is equivalent to the ANSI C size_t type, i.e., the largest unsigned integer type used to express a file size or position, or a memory block size.

-
- -

FT_PtrDist

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef ft_ptrdiff_t  FT_PtrDist;
-
-
- -

This is equivalent to the ANSI C ptrdiff_t type, i.e., the largest signed integer type used to express the distance between two pointers.

-
- -

FT_String

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef char  FT_String;
-
-
- -

A simple typedef for the char type, usually used for strings.

-
- -

FT_Tag

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef FT_UInt32  FT_Tag;
-
-
- -

A typedef for 32-bit tags (as used in the SFNT format).

-
- -

FT_Error

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef int  FT_Error;
-
-
- -

The FreeType error code type. A value of 0 is always interpreted as a successful operation.

-
- -

FT_Fixed

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed long  FT_Fixed;
-
-
- -

This type is used to store 16.16 fixed-point values, like scaling values or matrix coefficients.

-
- -

FT_Pointer

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef void*  FT_Pointer;
-
-
- -

A simple typedef for a typeless pointer.

-
- -

FT_Pos

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef signed long  FT_Pos;
-
-
- -

The type FT_Pos is used to store vectorial coordinates. Depending on the context, these can represent distances in integer font units, or 16.16, or 26.6 fixed-point pixel coordinates.

-
- -

FT_Vector

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Vector_
-  {
-    FT_Pos  x;
-    FT_Pos  y;
-
-  } FT_Vector;
-
-
- -

A simple structure used to store a 2D vector; coordinates are of the FT_Pos type.

-

fields

- - - - -
x -

The horizontal coordinate.

-
y -

The vertical coordinate.

-
- -
- -

FT_BBox

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_BBox_
-  {
-    FT_Pos  xMin, yMin;
-    FT_Pos  xMax, yMax;
-
-  } FT_BBox;
-
-
- -

A structure used to hold an outline's bounding box, i.e., the coordinates of its extrema in the horizontal and vertical directions.

-

fields

- - - - - - -
xMin -

The horizontal minimum (left-most).

-
yMin -

The vertical minimum (bottom-most).

-
xMax -

The horizontal maximum (right-most).

-
yMax -

The vertical maximum (top-most).

-
- -

note

- -

The bounding box is specified with the coordinates of the lower left and the upper right corner. In PostScript, those values are often called (llx,lly) and (urx,ury), respectively.

-

If yMin is negative, this value gives the glyph's descender. Otherwise, the glyph doesn't descend below the baseline. Similarly, if ymax is positive, this value gives the glyph's ascender.

-

xMin gives the horizontal distance from the glyph's origin to the left edge of the glyph's bounding box. If xMin is negative, the glyph extends to the left of the origin.

-
- -

FT_Matrix

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct  FT_Matrix_
-  {
-    FT_Fixed  xx, xy;
-    FT_Fixed  yx, yy;
-
-  } FT_Matrix;
-
-
- -

A simple structure used to store a 2x2 matrix. Coefficients are in 16.16 fixed-point format. The computation performed is: -

  x' = x*xx + y*xy
-  y' = x*yx + y*yy
-

-

fields

- - - - - - -
xx -

Matrix coefficient.

-
xy -

Matrix coefficient.

-
yx -

Matrix coefficient.

-
yy -

Matrix coefficient.

-
- -
- -

FT_FWord

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed short  FT_FWord;   /* distance in FUnits */
-
-
- -

A signed 16-bit integer used to store a distance in original font units.

-
- -

FT_UFWord

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef unsigned short  FT_UFWord;  /* unsigned distance */
-
-
- -

An unsigned 16-bit integer used to store a distance in original font units.

-
- -

FT_F2Dot14

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed short  FT_F2Dot14;
-
-
- -

A signed 2.14 fixed-point type used for unit vectors.

-
- -

FT_UnitVector

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct  FT_UnitVector_
-  {
-    FT_F2Dot14  x;
-    FT_F2Dot14  y;
-
-  } FT_UnitVector;
-
-
- -

A simple structure used to store a 2D vector unit vector. Uses FT_F2Dot14 types.

-

fields

- - - - -
x -

Horizontal coordinate.

-
y -

Vertical coordinate.

-
- -
- -

FT_F26Dot6

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef signed long  FT_F26Dot6;
-
-
- -

A signed 26.6 fixed-point type used for vectorial pixel coordinates.

-
- -

FT_Data

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct  FT_Data_
-  {
-    const FT_Byte*  pointer;
-    FT_Int          length;
-
-  } FT_Data;
-
-
- -

Read-only binary data represented as a pointer and a length.

-

fields

- - - - -
pointer -

The data.

-
length -

The length of the data in bytes.

-
- -
- -

FT_MAKE_TAG

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-#define FT_MAKE_TAG( _x1, _x2, _x3, _x4 ) \
-          (FT_Tag)                        \
-          ( ( (FT_ULong)_x1 << 24 ) |     \
-            ( (FT_ULong)_x2 << 16 ) |     \
-            ( (FT_ULong)_x3 <<  8 ) |     \
-              (FT_ULong)_x4         )
-
-
- -

This macro converts four-letter tags that are used to label TrueType tables into an unsigned long, to be used within FreeType.

-

note

- -

The produced values must be 32-bit integers. Don't redefine this macro.

-
- -

FT_Generic

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct  FT_Generic_
-  {
-    void*                 data;
-    FT_Generic_Finalizer  finalizer;
-
-  } FT_Generic;
-
-
- -

Client applications often need to associate their own data to a variety of FreeType core objects. For example, a text layout API might want to associate a glyph cache to a given size object.

-

Some FreeType object contains a generic field, of type FT_Generic, which usage is left to client applications and font servers.

-

It can be used to store a pointer to client-specific data, as well as the address of a ‘finalizer’ function, which will be called by FreeType when the object is destroyed (for example, the previous client example would put the address of the glyph cache destructor in the finalizer field).

-

fields

- - - - -
data -

A typeless pointer to any client-specified data. This field is completely ignored by the FreeType library.

-
finalizer -

A pointer to a ‘generic finalizer’ function, which will be called when the object is destroyed. If this field is set to NULL, no code will be called.

-
- -
- -

FT_Generic_Finalizer

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef void  (*FT_Generic_Finalizer)( void*  object );
-
-
- -

Describe a function used to destroy the ‘client’ data of any FreeType object. See the description of the FT_Generic type for details of usage.

-

input

- -

The address of the FreeType object that is under finalization. Its client data is accessed through its generic field.

-
- -

FT_Bitmap

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Bitmap_
-  {
-    unsigned int    rows;
-    unsigned int    width;
-    int             pitch;
-    unsigned char*  buffer;
-    unsigned short  num_grays;
-    unsigned char   pixel_mode;
-    unsigned char   palette_mode;
-    void*           palette;
-
-  } FT_Bitmap;
-
-
- -

A structure used to describe a bitmap or pixmap to the raster. Note that we now manage pixmaps of various depths through the pixel_mode field.

-

fields

- - - - - - - - - - -
rows -

The number of bitmap rows.

-
width -

The number of pixels in bitmap row.

-
pitch -

The pitch's absolute value is the number of bytes taken by one bitmap row, including padding. However, the pitch is positive when the bitmap has a ‘down’ flow, and negative when it has an ‘up’ flow. In all cases, the pitch is an offset to add to a bitmap pointer in order to go down one row.

-

Note that ‘padding’ means the alignment of a bitmap to a byte border, and FreeType functions normally align to the smallest possible integer value.

-

For the B/W rasterizer, pitch is always an even number.

-

To change the pitch of a bitmap (say, to make it a multiple of 4), use FT_Bitmap_Convert. Alternatively, you might use callback functions to directly render to the application's surface; see the file example2.cpp in the tutorial for a demonstration.

-
buffer -

A typeless pointer to the bitmap buffer. This value should be aligned on 32-bit boundaries in most cases.

-
num_grays -

This field is only used with FT_PIXEL_MODE_GRAY; it gives the number of gray levels used in the bitmap.

-
pixel_mode -

The pixel mode, i.e., how pixel bits are stored. See FT_Pixel_Mode for possible values.

-
palette_mode -

This field is intended for paletted pixel modes; it indicates how the palette is stored. Not used currently.

-
palette -

A typeless pointer to the bitmap palette; this field is intended for paletted pixel modes. Not used currently.

-
- -
- -

FT_Pixel_Mode

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef enum  FT_Pixel_Mode_
-  {
-    FT_PIXEL_MODE_NONE = 0,
-    FT_PIXEL_MODE_MONO,
-    FT_PIXEL_MODE_GRAY,
-    FT_PIXEL_MODE_GRAY2,
-    FT_PIXEL_MODE_GRAY4,
-    FT_PIXEL_MODE_LCD,
-    FT_PIXEL_MODE_LCD_V,
-    FT_PIXEL_MODE_BGRA,
-
-    FT_PIXEL_MODE_MAX      /* do not remove */
-
-  } FT_Pixel_Mode;
-
-
-  /* these constants are deprecated; use the corresponding `FT_Pixel_Mode` */
-  /* values instead.                                                       */
-#define ft_pixel_mode_none   FT_PIXEL_MODE_NONE
-#define ft_pixel_mode_mono   FT_PIXEL_MODE_MONO
-#define ft_pixel_mode_grays  FT_PIXEL_MODE_GRAY
-#define ft_pixel_mode_pal2   FT_PIXEL_MODE_GRAY2
-#define ft_pixel_mode_pal4   FT_PIXEL_MODE_GRAY4
-
-
- -

An enumeration type used to describe the format of pixels in a given bitmap. Note that additional formats may be added in the future.

-

values

- - - - - - - - - - -
FT_PIXEL_MODE_NONE -

Value 0 is reserved.

-
FT_PIXEL_MODE_MONO -

A monochrome bitmap, using 1 bit per pixel. Note that pixels are stored in most-significant order (MSB), which means that the left-most pixel in a byte has value 128.

-
FT_PIXEL_MODE_GRAY -

An 8-bit bitmap, generally used to represent anti-aliased glyph images. Each pixel is stored in one byte. Note that the number of ‘gray’ levels is stored in the num_grays field of the FT_Bitmap structure (it generally is 256).

-
FT_PIXEL_MODE_GRAY2 -

A 2-bit per pixel bitmap, used to represent embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however.

-
FT_PIXEL_MODE_GRAY4 -

A 4-bit per pixel bitmap, representing embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however.

-
FT_PIXEL_MODE_LCD -

An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on LCD displays; the bitmap is three times wider than the original glyph image. See also FT_RENDER_MODE_LCD.

-
FT_PIXEL_MODE_LCD_V -

An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on rotated LCD displays; the bitmap is three times taller than the original glyph image. See also FT_RENDER_MODE_LCD_V.

-
FT_PIXEL_MODE_BGRA -

[Since 2.5] An image with four 8-bit channels per pixel, representing a color image (such as emoticons) with alpha channel. For each pixel, the format is BGRA, which means, the blue channel comes first in memory. The color channels are pre-multiplied and in the sRGB colorspace. For example, full red at half-translucent opacity will be represented as ‘00,00,80,80’, not ‘00,00,FF,80’. See also FT_LOAD_COLOR.

-
- -
- -

FT_Glyph_Format

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef enum  FT_Glyph_Format_
-  {
-    FT_IMAGE_TAG( FT_GLYPH_FORMAT_NONE, 0, 0, 0, 0 ),
-
-    FT_IMAGE_TAG( FT_GLYPH_FORMAT_COMPOSITE, 'c', 'o', 'm', 'p' ),
-    FT_IMAGE_TAG( FT_GLYPH_FORMAT_BITMAP,    'b', 'i', 't', 's' ),
-    FT_IMAGE_TAG( FT_GLYPH_FORMAT_OUTLINE,   'o', 'u', 't', 'l' ),
-    FT_IMAGE_TAG( FT_GLYPH_FORMAT_PLOTTER,   'p', 'l', 'o', 't' )
-
-  } FT_Glyph_Format;
-
-
-  /* these constants are deprecated; use the corresponding */
-  /* `FT_Glyph_Format` values instead.                     */
-#define ft_glyph_format_none       FT_GLYPH_FORMAT_NONE
-#define ft_glyph_format_composite  FT_GLYPH_FORMAT_COMPOSITE
-#define ft_glyph_format_bitmap     FT_GLYPH_FORMAT_BITMAP
-#define ft_glyph_format_outline    FT_GLYPH_FORMAT_OUTLINE
-#define ft_glyph_format_plotter    FT_GLYPH_FORMAT_PLOTTER
-
-
- -

An enumeration type used to describe the format of a given glyph image. Note that this version of FreeType only supports two image formats, even though future font drivers will be able to register their own format.

-

values

- - - - - - - -
FT_GLYPH_FORMAT_NONE -

The value 0 is reserved.

-
FT_GLYPH_FORMAT_COMPOSITE -

The glyph image is a composite of several other images. This format is only used with FT_LOAD_NO_RECURSE, and is used to report compound glyphs (like accented characters).

-
FT_GLYPH_FORMAT_BITMAP -

The glyph image is a bitmap, and can be described as an FT_Bitmap. You generally need to access the bitmap field of the FT_GlyphSlotRec structure to read it.

-
FT_GLYPH_FORMAT_OUTLINE -

The glyph image is a vectorial outline made of line segments and Bezier arcs; it can be described as an FT_Outline; you generally want to access the outline field of the FT_GlyphSlotRec structure to read it.

-
FT_GLYPH_FORMAT_PLOTTER -

The glyph image is a vectorial path with no inside and outside contours. Some Type 1 fonts, like those in the Hershey family, contain glyphs in this format. These are described as FT_Outline, but FreeType isn't currently capable of rendering them correctly.

-
- -
- -

FT_IMAGE_TAG

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-#ifndef FT_IMAGE_TAG
-#define FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 )  \
-          value = ( ( (unsigned long)_x1 << 24 ) | \
-                    ( (unsigned long)_x2 << 16 ) | \
-                    ( (unsigned long)_x3 << 8  ) | \
-                      (unsigned long)_x4         )
-#endif /* FT_IMAGE_TAG */
-
-
- -

This macro converts four-letter tags to an unsigned long type.

-

note

- -

Since many 16-bit compilers don't like 32-bit enumerations, you should redefine this macro in case of problems to something like this: -

  #define FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 )  value
-

-

to get a simple enumeration without assigning special numbers.

-
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FreeType » Docs » Format-Specific API » BDF and PCF Files

-
-

BDF and PCF Files

-

Synopsis

-

This section contains the declaration of functions specific to BDF and PCF fonts.

-

BDF_PropertyType

-

Defined in FT_BDF_H (freetype/ftbdf.h).

-
-
-  typedef enum  BDF_PropertyType_
-  {
-    BDF_PROPERTY_TYPE_NONE     = 0,
-    BDF_PROPERTY_TYPE_ATOM     = 1,
-    BDF_PROPERTY_TYPE_INTEGER  = 2,
-    BDF_PROPERTY_TYPE_CARDINAL = 3
-
-  } BDF_PropertyType;
-
-
- -

A list of BDF property types.

-

values

- - - - - - -
BDF_PROPERTY_TYPE_NONE -

Value 0 is used to indicate a missing property.

-
BDF_PROPERTY_TYPE_ATOM -

Property is a string atom.

-
BDF_PROPERTY_TYPE_INTEGER -

Property is a 32-bit signed integer.

-
BDF_PROPERTY_TYPE_CARDINAL -

Property is a 32-bit unsigned integer.

-
- -
- -

BDF_Property

-

Defined in FT_BDF_H (freetype/ftbdf.h).

-
-
-  typedef struct BDF_PropertyRec_*  BDF_Property;
-
-
- -

A handle to a BDF_PropertyRec structure to model a given BDF/PCF property.

-
- -

BDF_PropertyRec

-

Defined in FT_BDF_H (freetype/ftbdf.h).

-
-
-  typedef struct  BDF_PropertyRec_
-  {
-    BDF_PropertyType  type;
-    union {
-      const char*     atom;
-      FT_Int32        integer;
-      FT_UInt32       cardinal;
-
-    } u;
-
-  } BDF_PropertyRec;
-
-
- -

This structure models a given BDF/PCF property.

-

fields

- - - - - - -
type -

The property type.

-
u.atom -

The atom string, if type is BDF_PROPERTY_TYPE_ATOM. May be NULL, indicating an empty string.

-
u.integer -

A signed integer, if type is BDF_PROPERTY_TYPE_INTEGER.

-
u.cardinal -

An unsigned integer, if type is BDF_PROPERTY_TYPE_CARDINAL.

-
- -
- -

FT_Get_BDF_Charset_ID

-

Defined in FT_BDF_H (freetype/ftbdf.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_BDF_Charset_ID( FT_Face       face,
-                         const char*  *acharset_encoding,
-                         const char*  *acharset_registry );
-
-
- -

Retrieve a BDF font character set identity, according to the BDF specification.

-

input

- - - -
face -

A handle to the input face.

-
- -

output

- - - - -
acharset_encoding -

Charset encoding, as a C string, owned by the face.

-
acharset_registry -

Charset registry, as a C string, owned by the face.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function only works with BDF faces, returning an error otherwise.

-
- -

FT_Get_BDF_Property

-

Defined in FT_BDF_H (freetype/ftbdf.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_BDF_Property( FT_Face           face,
-                       const char*       prop_name,
-                       BDF_PropertyRec  *aproperty );
-
-
- -

Retrieve a BDF property from a BDF or PCF font file.

-

input

- - - - -
face -

A handle to the input face.

-
name -

The property name.

-
- -

output

- - - -
aproperty -

The property.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function works with BDF and PCF fonts. It returns an error otherwise. It also returns an error if the property is not in the font.

-

A ‘property’ is a either key-value pair within the STARTPROPERTIES ... ENDPROPERTIES block of a BDF font or a key-value pair from the info->props array within a FontRec structure of a PCF font.

-

Integer properties are always stored as ‘signed’ within PCF fonts; consequently, BDF_PROPERTY_TYPE_CARDINAL is a possible return value for BDF fonts only.

-

In case of error, aproperty->type is always set to BDF_PROPERTY_TYPE_NONE.

-
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FreeType » Docs » Support API » Bitmap Handling

-
-

Bitmap Handling

-

Synopsis

-

This section contains functions for handling FT_Bitmap objects, automatically adjusting the target's bitmap buffer size as needed.

-

Note that none of the functions changes the bitmap's ‘flow’ (as indicated by the sign of the pitch field in FT_Bitmap).

-

To set the flow, assign an appropriate positive or negative value to the pitch field of the target FT_Bitmap object after calling FT_Bitmap_Init but before calling any of the other functions described here.

-

FT_Bitmap_Init

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( void )
-  FT_Bitmap_Init( FT_Bitmap  *abitmap );
-
-  /* deprecated */
-  FT_EXPORT( void )
-  FT_Bitmap_New( FT_Bitmap  *abitmap );
-
-
- -

Initialize a pointer to an FT_Bitmap structure.

-

inout

- - - -
abitmap -

A pointer to the bitmap structure.

-
- -

note

- -

A deprecated name for the same function is FT_Bitmap_New.

-
- -

FT_Bitmap_Copy

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Bitmap_Copy( FT_Library        library,
-                  const FT_Bitmap  *source,
-                  FT_Bitmap        *target );
-
-
- -

Copy a bitmap into another one.

-

input

- - - - -
library -

A handle to a library object.

-
source -

A handle to the source bitmap.

-
- -

output

- - - -
target -

A handle to the target bitmap.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

source->buffer and target->buffer must neither be equal nor overlap.

-
- -

FT_Bitmap_Embolden

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Bitmap_Embolden( FT_Library  library,
-                      FT_Bitmap*  bitmap,
-                      FT_Pos      xStrength,
-                      FT_Pos      yStrength );
-
-
- -

Embolden a bitmap. The new bitmap will be about xStrength pixels wider and yStrength pixels higher. The left and bottom borders are kept unchanged.

-

input

- - - - - -
library -

A handle to a library object.

-
xStrength -

How strong the glyph is emboldened horizontally. Expressed in 26.6 pixel format.

-
yStrength -

How strong the glyph is emboldened vertically. Expressed in 26.6 pixel format.

-
- -

inout

- - - -
bitmap -

A handle to the target bitmap.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The current implementation restricts xStrength to be less than or equal to 8 if bitmap is of pixel_mode FT_PIXEL_MODE_MONO.

-

If you want to embolden the bitmap owned by a FT_GlyphSlotRec, you should call FT_GlyphSlot_Own_Bitmap on the slot first.

-

Bitmaps in FT_PIXEL_MODE_GRAY2 and FT_PIXEL_MODE_GRAY@ format are converted to FT_PIXEL_MODE_GRAY format (i.e., 8bpp).

-
- -

FT_Bitmap_Convert

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Bitmap_Convert( FT_Library        library,
-                     const FT_Bitmap  *source,
-                     FT_Bitmap        *target,
-                     FT_Int            alignment );
-
-
- -

Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, 8bpp or 32bpp to a bitmap object with depth 8bpp, making the number of used bytes per line (a.k.a. the ‘pitch’) a multiple of alignment.

-

input

- - - - - -
library -

A handle to a library object.

-
source -

The source bitmap.

-
alignment -

The pitch of the bitmap is a multiple of this argument. Common values are 1, 2, or 4.

-
- -

output

- - - -
target -

The target bitmap.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

It is possible to call FT_Bitmap_Convert multiple times without calling FT_Bitmap_Done (the memory is simply reallocated).

-

Use FT_Bitmap_Done to finally remove the bitmap object.

-

The library argument is taken to have access to FreeType's memory handling functions.

-

source->buffer and target->buffer must neither be equal nor overlap.

-
- -

FT_Bitmap_Blend

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Bitmap_Blend( FT_Library         library,
-                   const FT_Bitmap*   source,
-                   const FT_Vector    source_offset,
-                   FT_Bitmap*         target,
-                   FT_Vector         *atarget_offset,
-                   FT_Color           color );
-
-
- -

Blend a bitmap onto another bitmap, using a given color.

-

input

- - - - - - -
library -

A handle to a library object.

-
source -

The source bitmap, which can have any FT_Pixel_Mode format.

-
source_offset -

The offset vector to the upper left corner of the source bitmap in 26.6 pixel format. It should represent an integer offset; the function will set the lowest six bits to zero to enforce that.

-
color -

The color used to draw source onto target.

-
- -

inout

- - - - -
target -

A handle to an FT_Bitmap object. It should be either initialized as empty with a call to FT_Bitmap_Init, or it should be of type FT_PIXEL_MODE_BGRA.

-
atarget_offset -

The offset vector to the upper left corner of the target bitmap in 26.6 pixel format. It should represent an integer offset; the function will set the lowest six bits to zero to enforce that.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function doesn't perform clipping.

-

The bitmap in target gets allocated or reallocated as needed; the vector atarget_offset is updated accordingly.

-

In case of allocation or reallocation, the bitmap's pitch is set to 4 * width. Both source and target must have the same bitmap flow (as indicated by the sign of the pitch field).

-

source->buffer and target->buffer must neither be equal nor overlap.

-

since

- -

2.10

-
- -

FT_GlyphSlot_Own_Bitmap

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_GlyphSlot_Own_Bitmap( FT_GlyphSlot  slot );
-
-
- -

Make sure that a glyph slot owns slot->bitmap.

-

input

- - - -
slot -

The glyph slot.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function is to be used in combination with FT_Bitmap_Embolden.

-
- -

FT_Bitmap_Done

-

Defined in FT_BITMAP_H (freetype/ftbitmap.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Bitmap_Done( FT_Library  library,
-                  FT_Bitmap  *bitmap );
-
-
- -

Destroy a bitmap object initialized with FT_Bitmap_Init.

-

input

- - - - -
library -

A handle to a library object.

-
bitmap -

The bitmap object to be freed.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The library argument is taken to have access to FreeType's memory handling functions.

-
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FreeType » Docs » Support API » BZIP2 Streams

-
-

BZIP2 Streams

-

Synopsis

-

This section contains the declaration of Bzip2-specific functions.

-

FT_Stream_OpenBzip2

-

Defined in FT_BZIP2_H (freetype/ftbzip2.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stream_OpenBzip2( FT_Stream  stream,
-                       FT_Stream  source );
-
-
- -

Open a new stream to parse bzip2-compressed font files. This is mainly used to support the compressed *.pcf.bz2 fonts that come with XFree86.

-

input

- - - - -
stream -

The target embedding stream.

-
source -

The source stream.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The source stream must be opened before calling this function.

-

Calling the internal function FT_Stream_Close on the new stream will not call FT_Stream_Close on the source stream. None of the stream objects will be released to the heap.

-

The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream.

-

In certain builds of the library, bzip2 compression recognition is automatically handled when calling FT_New_Face or FT_Open_Face. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a bzip2 compressed stream from it and re-open the face with it.

-

This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with bzip2 support.

-
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FreeType » Docs » Cache Sub-System » Cache Sub-System

-
-

Cache Sub-System

-

Synopsis

-

This section describes the FreeType 2 cache sub-system, which is used to limit the number of concurrently opened FT_Face and FT_Size objects, as well as caching information like character maps and glyph images while limiting their maximum memory usage.

-

Note that all types and functions begin with the FTC_ prefix.

-

The cache is highly portable and thus doesn't know anything about the fonts installed on your system, or how to access them. This implies the following scheme:

-

First, available or installed font faces are uniquely identified by FTC_FaceID values, provided to the cache by the client. Note that the cache only stores and compares these values, and doesn't try to interpret them in any way.

-

Second, the cache calls, only when needed, a client-provided function to convert an FTC_FaceID into a new FT_Face object. The latter is then completely managed by the cache, including its termination through FT_Done_Face. To monitor termination of face objects, the finalizer callback in the generic field of the FT_Face object can be used, which might also be used to store the FTC_FaceID of the face.

-

Clients are free to map face IDs to anything else. The most simple usage is to associate them to a (pathname,face_index) pair that is used to call FT_New_Face. However, more complex schemes are also possible.

-

Note that for the cache to work correctly, the face ID values must be persistent, which means that the contents they point to should not change at runtime, or that their value should not become invalid.

-

If this is unavoidable (e.g., when a font is uninstalled at runtime), you should call FTC_Manager_RemoveFaceID as soon as possible, to let the cache get rid of any references to the old FTC_FaceID it may keep internally. Failure to do so will lead to incorrect behaviour or even crashes.

-

To use the cache, start with calling FTC_Manager_New to create a new FTC_Manager object, which models a single cache instance. You can then look up FT_Face and FT_Size objects with FTC_Manager_LookupFace and FTC_Manager_LookupSize, respectively.

-

If you want to use the charmap caching, call FTC_CMapCache_New, then later use FTC_CMapCache_Lookup to perform the equivalent of FT_Get_Char_Index, only much faster.

-

If you want to use the FT_Glyph caching, call FTC_ImageCache, then later use FTC_ImageCache_Lookup to retrieve the corresponding FT_Glyph objects from the cache.

-

If you need lots of small bitmaps, it is much more memory efficient to call FTC_SBitCache_New followed by FTC_SBitCache_Lookup. This returns FTC_SBitRec structures, which are used to store small bitmaps directly. (A small bitmap is one whose metrics and dimensions all fit into 8-bit integers).

-

We hope to also provide a kerning cache in the near future.

-

FTC_Manager

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_ManagerRec_*  FTC_Manager;
-
-
- -

This object corresponds to one instance of the cache-subsystem. It is used to cache one or more FT_Face objects, along with corresponding FT_Size objects.

-

The manager intentionally limits the total number of opened FT_Face and FT_Size objects to control memory usage. See the max_faces and max_sizes parameters of FTC_Manager_New.

-

The manager is also used to cache ‘nodes’ of various types while limiting their total memory usage.

-

All limitations are enforced by keeping lists of managed objects in most-recently-used order, and flushing old nodes to make room for new ones.

-
- -

FTC_FaceID

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef FT_Pointer  FTC_FaceID;
-
-
- -

An opaque pointer type that is used to identity face objects. The contents of such objects is application-dependent.

-

These pointers are typically used to point to a user-defined structure containing a font file path, and face index.

-

note

- -

Never use NULL as a valid FTC_FaceID.

-

Face IDs are passed by the client to the cache manager that calls, when needed, the FTC_Face_Requester to translate them into new FT_Face objects.

-

If the content of a given face ID changes at runtime, or if the value becomes invalid (e.g., when uninstalling a font), you should immediately call FTC_Manager_RemoveFaceID before any other cache function.

-

Failure to do so will result in incorrect behaviour or even memory leaks and crashes.

-
- -

FTC_Face_Requester

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef FT_Error
-  (*FTC_Face_Requester)( FTC_FaceID  face_id,
-                         FT_Library  library,
-                         FT_Pointer  req_data,
-                         FT_Face*    aface );
-
-
- -

A callback function provided by client applications. It is used by the cache manager to translate a given FTC_FaceID into a new valid FT_Face object, on demand.

-

input

- - - - - -
face_id -

The face ID to resolve.

-
library -

A handle to a FreeType library object.

-
req_data -

Application-provided request data (see note below).

-
- -

output

- - - -
aface -

A new FT_Face handle.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The third parameter req_data is the same as the one passed by the client when FTC_Manager_New is called.

-

The face requester should not perform funny things on the returned face object, like creating a new FT_Size for it, or setting a transformation through FT_Set_Transform!

-
- -

FTC_Manager_New

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_Manager_New( FT_Library          library,
-                   FT_UInt             max_faces,
-                   FT_UInt             max_sizes,
-                   FT_ULong            max_bytes,
-                   FTC_Face_Requester  requester,
-                   FT_Pointer          req_data,
-                   FTC_Manager        *amanager );
-
-
- -

Create a new cache manager.

-

input

- - - - - - - - -
library -

The parent FreeType library handle to use.

-
max_faces -

Maximum number of opened FT_Face objects managed by this cache instance. Use 0 for defaults.

-
max_sizes -

Maximum number of opened FT_Size objects managed by this cache instance. Use 0 for defaults.

-
max_bytes -

Maximum number of bytes to use for cached data nodes. Use 0 for defaults. Note that this value does not account for managed FT_Face and FT_Size objects.

-
requester -

An application-provided callback used to translate face IDs into real FT_Face objects.

-
req_data -

A generic pointer that is passed to the requester each time it is called (see FTC_Face_Requester).

-
- -

output

- - - -
amanager -

A handle to a new manager object. 0 in case of failure.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FTC_Manager_Reset

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( void )
-  FTC_Manager_Reset( FTC_Manager  manager );
-
-
- -

Empty a given cache manager. This simply gets rid of all the currently cached FT_Face and FT_Size objects within the manager.

-

inout

- - - -
manager -

A handle to the manager.

-
- -
- -

FTC_Manager_Done

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( void )
-  FTC_Manager_Done( FTC_Manager  manager );
-
-
- -

Destroy a given manager after emptying it.

-

input

- - - -
manager -

A handle to the target cache manager object.

-
- -
- -

FTC_Manager_LookupFace

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_Manager_LookupFace( FTC_Manager  manager,
-                          FTC_FaceID   face_id,
-                          FT_Face     *aface );
-
-
- -

Retrieve the FT_Face object that corresponds to a given face ID through a cache manager.

-

input

- - - - -
manager -

A handle to the cache manager.

-
face_id -

The ID of the face object.

-
- -

output

- - - -
aface -

A handle to the face object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The returned FT_Face object is always owned by the manager. You should never try to discard it yourself.

-

The FT_Face object doesn't necessarily have a current size object (i.e., face->size can be 0). If you need a specific ‘font size’, use FTC_Manager_LookupSize instead.

-

Never change the face's transformation matrix (i.e., never call the FT_Set_Transform function) on a returned face! If you need to transform glyphs, do it yourself after glyph loading.

-

When you perform a lookup, out-of-memory errors are detected within the lookup and force incremental flushes of the cache until enough memory is released for the lookup to succeed.

-

If a lookup fails with FT_Err_Out_Of_Memory the cache has already been completely flushed, and still no memory was available for the operation.

-
- -

FTC_Manager_LookupSize

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_Manager_LookupSize( FTC_Manager  manager,
-                          FTC_Scaler   scaler,
-                          FT_Size     *asize );
-
-
- -

Retrieve the FT_Size object that corresponds to a given FTC_ScalerRec pointer through a cache manager.

-

input

- - - - -
manager -

A handle to the cache manager.

-
scaler -

A scaler handle.

-
- -

output

- - - -
asize -

A handle to the size object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The returned FT_Size object is always owned by the manager. You should never try to discard it by yourself.

-

You can access the parent FT_Face object simply as size->face if you need it. Note that this object is also owned by the manager.

-

note

- -

When you perform a lookup, out-of-memory errors are detected within the lookup and force incremental flushes of the cache until enough memory is released for the lookup to succeed.

-

If a lookup fails with FT_Err_Out_Of_Memory the cache has already been completely flushed, and still no memory is available for the operation.

-
- -

FTC_Manager_RemoveFaceID

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( void )
-  FTC_Manager_RemoveFaceID( FTC_Manager  manager,
-                            FTC_FaceID   face_id );
-
-
- -

A special function used to indicate to the cache manager that a given FTC_FaceID is no longer valid, either because its content changed, or because it was deallocated or uninstalled.

-

input

- - - - -
manager -

The cache manager handle.

-
face_id -

The FTC_FaceID to be removed.

-
- -

note

- -

This function flushes all nodes from the cache corresponding to this face_id, with the exception of nodes with a non-null reference count.

-

Such nodes are however modified internally so as to never appear in later lookups with the same face_id value, and to be immediately destroyed when released by all their users.

-
- -

FTC_Node

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_NodeRec_*  FTC_Node;
-
-
- -

An opaque handle to a cache node object. Each cache node is reference-counted. A node with a count of 0 might be flushed out of a full cache whenever a lookup request is performed.

-

If you look up nodes, you have the ability to ‘acquire’ them, i.e., to increment their reference count. This will prevent the node from being flushed out of the cache until you explicitly ‘release’ it (see FTC_Node_Unref).

-

See also FTC_SBitCache_Lookup and FTC_ImageCache_Lookup.

-
- -

FTC_Node_Unref

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( void )
-  FTC_Node_Unref( FTC_Node     node,
-                  FTC_Manager  manager );
-
-
- -

Decrement a cache node's internal reference count. When the count reaches 0, it is not destroyed but becomes eligible for subsequent cache flushes.

-

input

- - - - -
node -

The cache node handle.

-
manager -

The cache manager handle.

-
- -
- -

FTC_ImageCache

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_ImageCacheRec_*  FTC_ImageCache;
-
-
- -

A handle to a glyph image cache object. They are designed to hold many distinct glyph images while not exceeding a certain memory threshold.

-
- -

FTC_ImageCache_New

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_ImageCache_New( FTC_Manager      manager,
-                      FTC_ImageCache  *acache );
-
-
- -

Create a new glyph image cache.

-

input

- - - -
manager -

The parent manager for the image cache.

-
- -

output

- - - -
acache -

A handle to the new glyph image cache object.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FTC_ImageCache_Lookup

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_ImageCache_Lookup( FTC_ImageCache  cache,
-                         FTC_ImageType   type,
-                         FT_UInt         gindex,
-                         FT_Glyph       *aglyph,
-                         FTC_Node       *anode );
-
-
- -

Retrieve a given glyph image from a glyph image cache.

-

input

- - - - - -
cache -

A handle to the source glyph image cache.

-
type -

A pointer to a glyph image type descriptor.

-
gindex -

The glyph index to retrieve.

-
- -

output

- - - - -
aglyph -

The corresponding FT_Glyph object. 0 in case of failure.

-
anode -

Used to return the address of the corresponding cache node after incrementing its reference count (see note below).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The returned glyph is owned and managed by the glyph image cache. Never try to transform or discard it manually! You can however create a copy with FT_Glyph_Copy and modify the new one.

-

If anode is not NULL, it receives the address of the cache node containing the glyph image, after increasing its reference count. This ensures that the node (as well as the FT_Glyph) will always be kept in the cache until you call FTC_Node_Unref to ‘release’ it.

-

If anode is NULL, the cache node is left unchanged, which means that the FT_Glyph could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent!

-
- -

FTC_SBit

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_SBitRec_*  FTC_SBit;
-
-
- -

A handle to a small bitmap descriptor. See the FTC_SBitRec structure for details.

-
- -

FTC_SBitCache

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_SBitCacheRec_*  FTC_SBitCache;
-
-
- -

A handle to a small bitmap cache. These are special cache objects used to store small glyph bitmaps (and anti-aliased pixmaps) in a much more efficient way than the traditional glyph image cache implemented by FTC_ImageCache.

-
- -

FTC_SBitCache_New

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_SBitCache_New( FTC_Manager     manager,
-                     FTC_SBitCache  *acache );
-
-
- -

Create a new cache to store small glyph bitmaps.

-

input

- - - -
manager -

A handle to the source cache manager.

-
- -

output

- - - -
acache -

A handle to the new sbit cache. NULL in case of error.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FTC_SBitCache_Lookup

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_SBitCache_Lookup( FTC_SBitCache    cache,
-                        FTC_ImageType    type,
-                        FT_UInt          gindex,
-                        FTC_SBit        *sbit,
-                        FTC_Node        *anode );
-
-
- -

Look up a given small glyph bitmap in a given sbit cache and ‘lock’ it to prevent its flushing from the cache until needed.

-

input

- - - - - -
cache -

A handle to the source sbit cache.

-
type -

A pointer to the glyph image type descriptor.

-
gindex -

The glyph index.

-
- -

output

- - - - -
sbit -

A handle to a small bitmap descriptor.

-
anode -

Used to return the address of the corresponding cache node after incrementing its reference count (see note below).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The small bitmap descriptor and its bit buffer are owned by the cache and should never be freed by the application. They might as well disappear from memory on the next cache lookup, so don't treat them as persistent data.

-

The descriptor's buffer field is set to 0 to indicate a missing glyph bitmap.

-

If anode is not NULL, it receives the address of the cache node containing the bitmap, after increasing its reference count. This ensures that the node (as well as the image) will always be kept in the cache until you call FTC_Node_Unref to ‘release’ it.

-

If anode is NULL, the cache node is left unchanged, which means that the bitmap could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent!

-
- -

FTC_CMapCache

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_CMapCacheRec_*  FTC_CMapCache;
-
-
- -

An opaque handle used to model a charmap cache. This cache is to hold character codes -> glyph indices mappings.

-
- -

FTC_CMapCache_New

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_CMapCache_New( FTC_Manager     manager,
-                     FTC_CMapCache  *acache );
-
-
- -

Create a new charmap cache.

-

input

- - - -
manager -

A handle to the cache manager.

-
- -

output

- - - -
acache -

A new cache handle. NULL in case of error.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Like all other caches, this one will be destroyed with the cache manager.

-
- -

FTC_CMapCache_Lookup

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_UInt )
-  FTC_CMapCache_Lookup( FTC_CMapCache  cache,
-                        FTC_FaceID     face_id,
-                        FT_Int         cmap_index,
-                        FT_UInt32      char_code );
-
-
- -

Translate a character code into a glyph index, using the charmap cache.

-

input

- - - - - - -
cache -

A charmap cache handle.

-
face_id -

The source face ID.

-
cmap_index -

The index of the charmap in the source face. Any negative value means to use the cache FT_Face's default charmap.

-
char_code -

The character code (in the corresponding charmap).

-
- -

return

- -

Glyph index. 0 means ‘no glyph’.

-
- -

FTC_ScalerRec

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct  FTC_ScalerRec_
-  {
-    FTC_FaceID  face_id;
-    FT_UInt     width;
-    FT_UInt     height;
-    FT_Int      pixel;
-    FT_UInt     x_res;
-    FT_UInt     y_res;
-
-  } FTC_ScalerRec;
-
-
- -

A structure used to describe a given character size in either pixels or points to the cache manager. See FTC_Manager_LookupSize.

-

fields

- - - - - - - - -
face_id -

The source face ID.

-
width -

The character width.

-
height -

The character height.

-
pixel -

A Boolean. If 1, the width and height fields are interpreted as integer pixel character sizes. Otherwise, they are expressed as 1/64th of points.

-
x_res -

Only used when pixel is value 0 to indicate the horizontal resolution in dpi.

-
y_res -

Only used when pixel is value 0 to indicate the vertical resolution in dpi.

-
- -

note

- -

This type is mainly used to retrieve FT_Size objects through the cache manager.

-
- -

FTC_Scaler

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_ScalerRec_*  FTC_Scaler;
-
-
- -

A handle to an FTC_ScalerRec structure.

-
- -

FTC_ImageTypeRec

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct  FTC_ImageTypeRec_
-  {
-    FTC_FaceID  face_id;
-    FT_UInt     width;
-    FT_UInt     height;
-    FT_Int32    flags;
-
-  } FTC_ImageTypeRec;
-
-
- -

A structure used to model the type of images in a glyph cache.

-

fields

- - - - - - -
face_id -

The face ID.

-
width -

The width in pixels.

-
height -

The height in pixels.

-
flags -

The load flags, as in FT_Load_Glyph.

-
- -
- -

FTC_ImageType

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct FTC_ImageTypeRec_*  FTC_ImageType;
-
-
- -

A handle to an FTC_ImageTypeRec structure.

-
- -

FTC_ImageCache_LookupScaler

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_ImageCache_LookupScaler( FTC_ImageCache  cache,
-                               FTC_Scaler      scaler,
-                               FT_ULong        load_flags,
-                               FT_UInt         gindex,
-                               FT_Glyph       *aglyph,
-                               FTC_Node       *anode );
-
-
- -

A variant of FTC_ImageCache_Lookup that uses an FTC_ScalerRec to specify the face ID and its size.

-

input

- - - - - - -
cache -

A handle to the source glyph image cache.

-
scaler -

A pointer to a scaler descriptor.

-
load_flags -

The corresponding load flags.

-
gindex -

The glyph index to retrieve.

-
- -

output

- - - - -
aglyph -

The corresponding FT_Glyph object. 0 in case of failure.

-
anode -

Used to return the address of the corresponding cache node after incrementing its reference count (see note below).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The returned glyph is owned and managed by the glyph image cache. Never try to transform or discard it manually! You can however create a copy with FT_Glyph_Copy and modify the new one.

-

If anode is not NULL, it receives the address of the cache node containing the glyph image, after increasing its reference count. This ensures that the node (as well as the FT_Glyph) will always be kept in the cache until you call FTC_Node_Unref to ‘release’ it.

-

If anode is NULL, the cache node is left unchanged, which means that the FT_Glyph could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent!

-

Calls to FT_Set_Char_Size and friends have no effect on cached glyphs; you should always use the FreeType cache API instead.

-
- -

FTC_SBitRec

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  typedef struct  FTC_SBitRec_
-  {
-    FT_Byte   width;
-    FT_Byte   height;
-    FT_Char   left;
-    FT_Char   top;
-
-    FT_Byte   format;
-    FT_Byte   max_grays;
-    FT_Short  pitch;
-    FT_Char   xadvance;
-    FT_Char   yadvance;
-
-    FT_Byte*  buffer;
-
-  } FTC_SBitRec;
-
-
- -

A very compact structure used to describe a small glyph bitmap.

-

fields

- - - - - - - - - - - - -
width -

The bitmap width in pixels.

-
height -

The bitmap height in pixels.

-
left -

The horizontal distance from the pen position to the left bitmap border (a.k.a. ‘left side bearing’, or ‘lsb’).

-
top -

The vertical distance from the pen position (on the baseline) to the upper bitmap border (a.k.a. ‘top side bearing’). The distance is positive for upwards y coordinates.

-
format -

The format of the glyph bitmap (monochrome or gray).

-
max_grays -

Maximum gray level value (in the range 1 to 255).

-
pitch -

The number of bytes per bitmap line. May be positive or negative.

-
xadvance -

The horizontal advance width in pixels.

-
yadvance -

The vertical advance height in pixels.

-
buffer -

A pointer to the bitmap pixels.

-
- -
- -

FTC_SBitCache_LookupScaler

-

Defined in FT_CACHE_H (freetype/ftcache.h).

-
-
-  FT_EXPORT( FT_Error )
-  FTC_SBitCache_LookupScaler( FTC_SBitCache  cache,
-                              FTC_Scaler     scaler,
-                              FT_ULong       load_flags,
-                              FT_UInt        gindex,
-                              FTC_SBit      *sbit,
-                              FTC_Node      *anode );
-
-
- -

A variant of FTC_SBitCache_Lookup that uses an FTC_ScalerRec to specify the face ID and its size.

-

input

- - - - - - -
cache -

A handle to the source sbit cache.

-
scaler -

A pointer to the scaler descriptor.

-
load_flags -

The corresponding load flags.

-
gindex -

The glyph index.

-
- -

output

- - - - -
sbit -

A handle to a small bitmap descriptor.

-
anode -

Used to return the address of the corresponding cache node after incrementing its reference count (see note below).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The small bitmap descriptor and its bit buffer are owned by the cache and should never be freed by the application. They might as well disappear from memory on the next cache lookup, so don't treat them as persistent data.

-

The descriptor's buffer field is set to 0 to indicate a missing glyph bitmap.

-

If anode is not NULL, it receives the address of the cache node containing the bitmap, after increasing its reference count. This ensures that the node (as well as the image) will always be kept in the cache until you call FTC_Node_Unref to ‘release’ it.

-

If anode is NULL, the cache node is left unchanged, which means that the bitmap could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent!

-
- - - - - - - - - -
-
-
-
- - - - -
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FreeType » Docs » Controlling FreeType Modules » The CFF driver

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-

The CFF driver

-

Synopsis

-

While FreeType's CFF driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get.

-

The CFF driver's module name is ‘cff’.

-

Available properties are hinting-engine, no-stem-darkening, darkening-parameters, and random-seed, as documented in the ‘Driver properties’ section.

-

Hinting and antialiasing principles of the new engine

-

The rasterizer is positioning horizontal features (e.g., ascender height & x-height, or crossbars) on the pixel grid and minimizing the amount of antialiasing applied to them, while placing vertical features (vertical stems) on the pixel grid without hinting, thus representing the stem position and weight accurately. Sometimes the vertical stems may be only partially black. In this context, ‘antialiasing’ means that stems are not positioned exactly on pixel borders, causing a fuzzy appearance.

-

There are two principles behind this approach.

-

1) No hinting in the horizontal direction: Unlike ‘superhinted’ TrueType, which changes glyph widths to accommodate regular inter-glyph spacing, Adobe's approach is ‘faithful to the design’ in representing both the glyph width and the inter-glyph spacing designed for the font. This makes the screen display as close as it can be to the result one would get with infinite resolution, while preserving what is considered the key characteristics of each glyph. Note that the distances between unhinted and grid-fitted positions at small sizes are comparable to kerning values and thus would be noticeable (and distracting) while reading if hinting were applied.

-

One of the reasons to not hint horizontally is antialiasing for LCD screens: The pixel geometry of modern displays supplies three vertical subpixels as the eye moves horizontally across each visible pixel. On devices where we can be certain this characteristic is present a rasterizer can take advantage of the subpixels to add increments of weight. In Western writing systems this turns out to be the more critical direction anyway; the weights and spacing of vertical stems (see above) are central to Armenian, Cyrillic, Greek, and Latin type designs. Even when the rasterizer uses greyscale antialiasing instead of color (a necessary compromise when one doesn't know the screen characteristics), the unhinted vertical features preserve the design's weight and spacing much better than aliased type would.

-

2) Alignment in the vertical direction: Weights and spacing along the y axis are less critical; what is much more important is the visual alignment of related features (like cap-height and x-height). The sense of alignment for these is enhanced by the sharpness of grid-fit edges, while the cruder vertical resolution (full pixels instead of ⅓ pixels) is less of a problem.

-

On the technical side, horizontal alignment zones for ascender, x-height, and other important height values (traditionally called ‘blue zones’) as defined in the font are positioned independently, each being rounded to the nearest pixel edge, taking care of overshoot suppression at small sizes, stem darkening, and scaling.

-

Hstems (this is, hint values defined in the font to help align horizontal features) that fall within a blue zone are said to be ‘captured’ and are aligned to that zone. Uncaptured stems are moved in one of four ways, top edge up or down, bottom edge up or down. Unless there are conflicting hstems, the smallest movement is taken to minimize distortion.

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FreeType » Docs » Format-Specific API » CID Fonts

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-

CID Fonts

-

Synopsis

-

This section contains the declaration of CID-keyed font-specific functions.

-

FT_Get_CID_Registry_Ordering_Supplement

-

Defined in FT_CID_H (freetype/ftcid.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_CID_Registry_Ordering_Supplement( FT_Face       face,
-                                           const char*  *registry,
-                                           const char*  *ordering,
-                                           FT_Int       *supplement );
-
-
- -

Retrieve the Registry/Ordering/Supplement triple (also known as the "R/O/S") from a CID-keyed font.

-

input

- - - -
face -

A handle to the input face.

-
- -

output

- - - - - -
registry -

The registry, as a C string, owned by the face.

-
ordering -

The ordering, as a C string, owned by the face.

-
supplement -

The supplement.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function only works with CID faces, returning an error otherwise.

-

since

- -

2.3.6

-
- -

FT_Get_CID_Is_Internally_CID_Keyed

-

Defined in FT_CID_H (freetype/ftcid.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_CID_Is_Internally_CID_Keyed( FT_Face   face,
-                                      FT_Bool  *is_cid );
-
-
- -

Retrieve the type of the input face, CID keyed or not. In contrast to the FT_IS_CID_KEYED macro this function returns successfully also for CID-keyed fonts in an SFNT wrapper.

-

input

- - - -
face -

A handle to the input face.

-
- -

output

- - - -
is_cid -

The type of the face as an FT_Bool.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function only works with CID faces and OpenType fonts, returning an error otherwise.

-

since

- -

2.3.9

-
- -

FT_Get_CID_From_Glyph_Index

-

Defined in FT_CID_H (freetype/ftcid.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_CID_From_Glyph_Index( FT_Face   face,
-                               FT_UInt   glyph_index,
-                               FT_UInt  *cid );
-
-
- -

Retrieve the CID of the input glyph index.

-

input

- - - - -
face -

A handle to the input face.

-
glyph_index -

The input glyph index.

-
- -

output

- - - -
cid -

The CID as an FT_UInt.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function only works with CID faces and OpenType fonts, returning an error otherwise.

-

since

- -

2.3.9

-
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FreeType » Docs » Core API » Glyph Color Management

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Glyph Color Management

-

Synopsis

-

The functions described here allow access and manipulation of color palette entries in OpenType's ‘CPAL’ tables.

-

FT_Color

-

Defined in FT_COLOR_H (freetype/ftcolor.h).

-
-
-  typedef struct  FT_Color_
-  {
-    FT_Byte  blue;
-    FT_Byte  green;
-    FT_Byte  red;
-    FT_Byte  alpha;
-
-  } FT_Color;
-
-
- -

This structure models a BGRA color value of a ‘CPAL’ palette entry.

-

The used color space is sRGB; the colors are not pre-multiplied, and alpha values must be explicitly set.

-

fields

- - - - - - -
blue -

Blue value.

-
green -

Green value.

-
red -

Red value.

-
alpha -

Alpha value, giving the red, green, and blue color's opacity.

-
- -

since

- -

2.10

-
- -

FT_PALETTE_XXX

-

Defined in FT_COLOR_H (freetype/ftcolor.h).

-
-
-#define FT_PALETTE_FOR_LIGHT_BACKGROUND  0x01
-#define FT_PALETTE_FOR_DARK_BACKGROUND   0x02
-
-
- -

A list of bit field constants used in the palette_flags array of the FT_Palette_Data structure to indicate for which background a palette with a given index is usable.

-

values

- - - - -
FT_PALETTE_FOR_LIGHT_BACKGROUND -

The palette is appropriate to use when displaying the font on a light background such as white.

-
FT_PALETTE_FOR_DARK_BACKGROUND -

The palette is appropriate to use when displaying the font on a dark background such as black.

-
- -

since

- -

2.10

-
- -

FT_Palette_Data

-

Defined in FT_COLOR_H (freetype/ftcolor.h).

-
-
-  typedef struct  FT_Palette_Data_ {
-    FT_UShort         num_palettes;
-    const FT_UShort*  palette_name_ids;
-    const FT_UShort*  palette_flags;
-
-    FT_UShort         num_palette_entries;
-    const FT_UShort*  palette_entry_name_ids;
-
-  } FT_Palette_Data;
-
-
- -

This structure holds the data of the ‘CPAL’ table.

-

fields

- - - - - - - -
num_palettes -

The number of palettes.

-
palette_name_ids -

A read-only array of palette name IDs with num_palettes elements, corresponding to entries like ‘dark’ or ‘light’ in the font's ‘name’ table.

-

An empty name ID in the ‘CPAL’ table gets represented as value 0xFFFF.

-

NULL if the font's ‘CPAL’ table doesn't contain appropriate data.

-
palette_flags -

A read-only array of palette flags with num_palettes elements. Possible values are an ORed combination of FT_PALETTE_FOR_LIGHT_BACKGROUND and FT_PALETTE_FOR_DARK_BACKGROUND.

-

NULL if the font's ‘CPAL’ table doesn't contain appropriate data.

-
num_palette_entries -

The number of entries in a single palette. All palettes have the same size.

-
palette_entry_name_ids -

A read-only array of palette entry name IDs with num_palette_entries. In each palette, entries with the same index have the same function. For example, index 0 might correspond to string ‘outline’ in the font's ‘name’ table to indicate that this palette entry is used for outlines, index 1 might correspond to ‘fill’ to indicate the filling color palette entry, etc.

-

An empty entry name ID in the ‘CPAL’ table gets represented as value 0xFFFF.

-

NULL if the font's ‘CPAL’ table doesn't contain appropriate data.

-
- -

note

- -

Use function FT_Get_Sfnt_Name to map name IDs and entry name IDs to name strings.

-

since

- -

2.10

-
- -

FT_Palette_Data_Get

-

Defined in FT_COLOR_H (freetype/ftcolor.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Palette_Data_Get( FT_Face           face,
-                       FT_Palette_Data  *apalette );
-
-
- -

Retrieve the face's color palette data.

-

input

- - - -
face -

The source face handle.

-
- -

output

- - - -
apalette -

A pointer to an FT_Palette_Data structure.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

All arrays in the returned FT_Palette_Data structure are read-only.

-

This function always returns an error if the config macro TT_CONFIG_OPTION_COLOR_LAYERS is not defined in ftoption.h.

-

since

- -

2.10

-
- -

FT_Palette_Select

-

Defined in FT_COLOR_H (freetype/ftcolor.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Palette_Select( FT_Face     face,
-                     FT_UShort   palette_index,
-                     FT_Color*  *apalette );
-
-
- -

This function has two purposes.

-

(1) It activates a palette for rendering color glyphs, and

-

(2) it retrieves all (unmodified) color entries of this palette. This function returns a read-write array, which means that a calling application can modify the palette entries on demand.

-

A corollary of (2) is that calling the function, then modifying some values, then calling the function again with the same arguments resets all color entries to the original ‘CPAL’ values; all user modifications are lost.

-

input

- - - - -
face -

The source face handle.

-
palette_index -

The palette index.

-
- -

output

- - - -
apalette -

An array of color entries for a palette with index palette_index, having num_palette_entries elements (as found in the FT_Palette_Data structure). If apalette is set to NULL, no array gets returned (and no color entries can be modified).

-

In case the font doesn't support color palettes, NULL is returned.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The array pointed to by apalette_entries is owned and managed by FreeType.

-

This function always returns an error if the config macro TT_CONFIG_OPTION_COLOR_LAYERS is not defined in ftoption.h.

-

since

- -

2.10

-
- -

FT_Palette_Set_Foreground_Color

-

Defined in FT_COLOR_H (freetype/ftcolor.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Palette_Set_Foreground_Color( FT_Face   face,
-                                   FT_Color  foreground_color );
-
-
- -

‘COLR’ uses palette index 0xFFFF to indicate a ‘text foreground color’. This function sets this value.

-

input

- - - - -
face -

The source face handle.

-
foreground_color -

An FT_Color structure to define the text foreground color.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If this function isn't called, the text foreground color is set to white opaque (BGRA value 0xFFFFFFFF) if FT_PALETTE_FOR_DARK_BACKGROUND is present for the current palette, and black opaque (BGRA value 0x000000FF) otherwise, including the case that no palette types are available in the ‘CPAL’ table.

-

This function always returns an error if the config macro TT_CONFIG_OPTION_COLOR_LAYERS is not defined in ftoption.h.

-

since

- -

2.10

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FreeType » Docs » Support API » Computations

-
-

Computations

-

Synopsis

-

This section contains various functions used to perform computations on 16.16 fixed-float numbers or 2d vectors.

-

Attention: Most arithmetic functions take FT_Long as arguments. For historical reasons, FreeType was designed under the assumption that FT_Long is a 32-bit integer; results can thus be undefined if the arguments don't fit into 32 bits.

-

FT_MulDiv

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Long )
-  FT_MulDiv( FT_Long  a,
-             FT_Long  b,
-             FT_Long  c );
-
-
- -

Compute (a*b)/c with maximum accuracy, using a 64-bit intermediate integer whenever necessary.

-

This function isn't necessarily as fast as some processor-specific operations, but is at least completely portable.

-

input

- - - - - -
a -

The first multiplier.

-
b -

The second multiplier.

-
c -

The divisor.

-
- -

return

- -

The result of (a*b)/c. This function never traps when trying to divide by zero; it simply returns ‘MaxInt’ or ‘MinInt’ depending on the signs of a and b.

-
- -

FT_MulFix

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Long )
-  FT_MulFix( FT_Long  a,
-             FT_Long  b );
-
-
- -

Compute (a*b)/0x10000 with maximum accuracy. Its main use is to multiply a given value by a 16.16 fixed-point factor.

-

input

- - - - -
a -

The first multiplier.

-
b -

The second multiplier. Use a 16.16 factor here whenever possible (see note below).

-
- -

return

- -

The result of (a*b)/0x10000.

-

note

- -

This function has been optimized for the case where the absolute value of a is less than 2048, and b is a 16.16 scaling factor. As this happens mainly when scaling from notional units to fractional pixels in FreeType, it resulted in noticeable speed improvements between versions 2.x and 1.x.

-

As a conclusion, always try to place a 16.16 factor as the second argument of this function; this can make a great difference.

-
- -

FT_DivFix

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Long )
-  FT_DivFix( FT_Long  a,
-             FT_Long  b );
-
-
- -

Compute (a*0x10000)/b with maximum accuracy. Its main use is to divide a given value by a 16.16 fixed-point factor.

-

input

- - - - -
a -

The numerator.

-
b -

The denominator. Use a 16.16 factor here.

-
- -

return

- -

The result of (a*0x10000)/b.

-
- -

FT_RoundFix

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_RoundFix( FT_Fixed  a );
-
-
- -

Round a 16.16 fixed number.

-

input

- - - -
a -

The number to be rounded.

-
- -

return

- -

a rounded to the nearest 16.16 fixed integer, halfway cases away from zero.

-

note

- -

The function uses wrap-around arithmetic.

-
- -

FT_CeilFix

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_CeilFix( FT_Fixed  a );
-
-
- -

Compute the smallest following integer of a 16.16 fixed number.

-

input

- - - -
a -

The number for which the ceiling function is to be computed.

-
- -

return

- -

a rounded towards plus infinity.

-

note

- -

The function uses wrap-around arithmetic.

-
- -

FT_FloorFix

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_FloorFix( FT_Fixed  a );
-
-
- -

Compute the largest previous integer of a 16.16 fixed number.

-

input

- - - -
a -

The number for which the floor function is to be computed.

-
- -

return

- -

a rounded towards minus infinity.

-
- -

FT_Vector_Transform

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( void )
-  FT_Vector_Transform( FT_Vector*        vector,
-                       const FT_Matrix*  matrix );
-
-
- -

Transform a single vector through a 2x2 matrix.

-

inout

- - - -
vector -

The target vector to transform.

-
- -

input

- - - -
matrix -

A pointer to the source 2x2 matrix.

-
- -

note

- -

The result is undefined if either vector or matrix is invalid.

-
- -

FT_Matrix_Multiply

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( void )
-  FT_Matrix_Multiply( const FT_Matrix*  a,
-                      FT_Matrix*        b );
-
-
- -

Perform the matrix operation b = a*b.

-

input

- - - -
a -

A pointer to matrix a.

-
- -

inout

- - - -
b -

A pointer to matrix b.

-
- -

note

- -

The result is undefined if either a or b is zero.

-

Since the function uses wrap-around arithmetic, results become meaningless if the arguments are very large.

-
- -

FT_Matrix_Invert

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Matrix_Invert( FT_Matrix*  matrix );
-
-
- -

Invert a 2x2 matrix. Return an error if it can't be inverted.

-

inout

- - - -
matrix -

A pointer to the target matrix. Remains untouched in case of error.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Angle

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  typedef FT_Fixed  FT_Angle;
-
-
- -

This type is used to model angle values in FreeType. Note that the angle is a 16.16 fixed-point value expressed in degrees.

-
- -

FT_ANGLE_PI

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-#define FT_ANGLE_PI  ( 180L << 16 )
-
-
- -

The angle pi expressed in FT_Angle units.

-
- -

FT_ANGLE_2PI

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-#define FT_ANGLE_2PI  ( FT_ANGLE_PI * 2 )
-
-
- -

The angle 2*pi expressed in FT_Angle units.

-
- -

FT_ANGLE_PI2

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-#define FT_ANGLE_PI2  ( FT_ANGLE_PI / 2 )
-
-
- -

The angle pi/2 expressed in FT_Angle units.

-
- -

FT_ANGLE_PI4

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-#define FT_ANGLE_PI4  ( FT_ANGLE_PI / 4 )
-
-
- -

The angle pi/4 expressed in FT_Angle units.

-
- -

FT_Sin

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_Sin( FT_Angle  angle );
-
-
- -

Return the sinus of a given angle in fixed-point format.

-

input

- - - -
angle -

The input angle.

-
- -

return

- -

The sinus value.

-

note

- -

If you need both the sinus and cosinus for a given angle, use the function FT_Vector_Unit.

-
- -

FT_Cos

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_Cos( FT_Angle  angle );
-
-
- -

Return the cosinus of a given angle in fixed-point format.

-

input

- - - -
angle -

The input angle.

-
- -

return

- -

The cosinus value.

-

note

- -

If you need both the sinus and cosinus for a given angle, use the function FT_Vector_Unit.

-
- -

FT_Tan

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_Tan( FT_Angle  angle );
-
-
- -

Return the tangent of a given angle in fixed-point format.

-

input

- - - -
angle -

The input angle.

-
- -

return

- -

The tangent value.

-
- -

FT_Atan2

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( FT_Angle )
-  FT_Atan2( FT_Fixed  x,
-            FT_Fixed  y );
-
-
- -

Return the arc-tangent corresponding to a given vector (x,y) in the 2d plane.

-

input

- - - - -
x -

The horizontal vector coordinate.

-
y -

The vertical vector coordinate.

-
- -

return

- -

The arc-tangent value (i.e. angle).

-
- -

FT_Angle_Diff

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( FT_Angle )
-  FT_Angle_Diff( FT_Angle  angle1,
-                 FT_Angle  angle2 );
-
-
- -

Return the difference between two angles. The result is always constrained to the ]-PI..PI] interval.

-

input

- - - - -
angle1 -

First angle.

-
angle2 -

Second angle.

-
- -

return

- -

Constrained value of angle2-angle1.

-
- -

FT_Vector_Unit

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( void )
-  FT_Vector_Unit( FT_Vector*  vec,
-                  FT_Angle    angle );
-
-
- -

Return the unit vector corresponding to a given angle. After the call, the value of vec.x will be cos(angle), and the value of vec.y will be sin(angle).

-

This function is useful to retrieve both the sinus and cosinus of a given angle quickly.

-

output

- - - -
vec -

The address of target vector.

-
- -

input

- - - -
angle -

The input angle.

-
- -
- -

FT_Vector_Rotate

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( void )
-  FT_Vector_Rotate( FT_Vector*  vec,
-                    FT_Angle    angle );
-
-
- -

Rotate a vector by a given angle.

-

inout

- - - -
vec -

The address of target vector.

-
- -

input

- - - -
angle -

The input angle.

-
- -
- -

FT_Vector_Length

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( FT_Fixed )
-  FT_Vector_Length( FT_Vector*  vec );
-
-
- -

Return the length of a given vector.

-

input

- - - -
vec -

The address of target vector.

-
- -

return

- -

The vector length, expressed in the same units that the original vector coordinates.

-
- -

FT_Vector_Polarize

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( void )
-  FT_Vector_Polarize( FT_Vector*  vec,
-                      FT_Fixed   *length,
-                      FT_Angle   *angle );
-
-
- -

Compute both the length and angle of a given vector.

-

input

- - - -
vec -

The address of source vector.

-
- -

output

- - - - -
length -

The vector length.

-
angle -

The vector angle.

-
- -
- -

FT_Vector_From_Polar

-

Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h).

-
-
-  FT_EXPORT( void )
-  FT_Vector_From_Polar( FT_Vector*  vec,
-                        FT_Fixed    length,
-                        FT_Angle    angle );
-
-
- -

Compute vector coordinates from a length and angle.

-

output

- - - -
vec -

The address of source vector.

-
- -

input

- - - - -
length -

The vector length.

-
angle -

The vector angle.

-
- -
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-
-
-
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FreeType » Docs » Error Codes » Error Code Values

-
-

Error Code Values

-

Synopsis

-

The list below is taken verbatim from the file fterrdef.h (loaded automatically by including FT_FREETYPE_H). The first argument of the FT_ERROR_DEF_ macro is the error label; by default, the prefix FT_Err_ gets added so that you get error names like FT_Err_Cannot_Open_Resource. The second argument is the error code, and the last argument an error string, which is not used by FreeType.

-

Within your application you should only use error names and never its numeric values! The latter might (and actually do) change in forthcoming FreeType versions.

-

Macro FT_NOERRORDEF_ defines FT_Err_Ok, which is always zero. See the ‘Error Enumerations’ subsection how to automatically generate a list of error strings.

-

FT_Err_XXX

-
-
-  /* generic errors */
-
-  FT_NOERRORDEF_( Ok,                                        0x00,
-                  "no error" )
-
-  FT_ERRORDEF_( Cannot_Open_Resource,                        0x01,
-                "cannot open resource" )
-  FT_ERRORDEF_( Unknown_File_Format,                         0x02,
-                "unknown file format" )
-  FT_ERRORDEF_( Invalid_File_Format,                         0x03,
-                "broken file" )
-  FT_ERRORDEF_( Invalid_Version,                             0x04,
-                "invalid FreeType version" )
-  FT_ERRORDEF_( Lower_Module_Version,                        0x05,
-                "module version is too low" )
-  FT_ERRORDEF_( Invalid_Argument,                            0x06,
-                "invalid argument" )
-  FT_ERRORDEF_( Unimplemented_Feature,                       0x07,
-                "unimplemented feature" )
-  FT_ERRORDEF_( Invalid_Table,                               0x08,
-                "broken table" )
-  FT_ERRORDEF_( Invalid_Offset,                              0x09,
-                "broken offset within table" )
-  FT_ERRORDEF_( Array_Too_Large,                             0x0A,
-                "array allocation size too large" )
-  FT_ERRORDEF_( Missing_Module,                              0x0B,
-                "missing module" )
-  FT_ERRORDEF_( Missing_Property,                            0x0C,
-                "missing property" )
-
-  /* glyph/character errors */
-
-  FT_ERRORDEF_( Invalid_Glyph_Index,                         0x10,
-                "invalid glyph index" )
-  FT_ERRORDEF_( Invalid_Character_Code,                      0x11,
-                "invalid character code" )
-  FT_ERRORDEF_( Invalid_Glyph_Format,                        0x12,
-                "unsupported glyph image format" )
-  FT_ERRORDEF_( Cannot_Render_Glyph,                         0x13,
-                "cannot render this glyph format" )
-  FT_ERRORDEF_( Invalid_Outline,                             0x14,
-                "invalid outline" )
-  FT_ERRORDEF_( Invalid_Composite,                           0x15,
-                "invalid composite glyph" )
-  FT_ERRORDEF_( Too_Many_Hints,                              0x16,
-                "too many hints" )
-  FT_ERRORDEF_( Invalid_Pixel_Size,                          0x17,
-                "invalid pixel size" )
-
-  /* handle errors */
-
-  FT_ERRORDEF_( Invalid_Handle,                              0x20,
-                "invalid object handle" )
-  FT_ERRORDEF_( Invalid_Library_Handle,                      0x21,
-                "invalid library handle" )
-  FT_ERRORDEF_( Invalid_Driver_Handle,                       0x22,
-                "invalid module handle" )
-  FT_ERRORDEF_( Invalid_Face_Handle,                         0x23,
-                "invalid face handle" )
-  FT_ERRORDEF_( Invalid_Size_Handle,                         0x24,
-                "invalid size handle" )
-  FT_ERRORDEF_( Invalid_Slot_Handle,                         0x25,
-                "invalid glyph slot handle" )
-  FT_ERRORDEF_( Invalid_CharMap_Handle,                      0x26,
-                "invalid charmap handle" )
-  FT_ERRORDEF_( Invalid_Cache_Handle,                        0x27,
-                "invalid cache manager handle" )
-  FT_ERRORDEF_( Invalid_Stream_Handle,                       0x28,
-                "invalid stream handle" )
-
-  /* driver errors */
-
-  FT_ERRORDEF_( Too_Many_Drivers,                            0x30,
-                "too many modules" )
-  FT_ERRORDEF_( Too_Many_Extensions,                         0x31,
-                "too many extensions" )
-
-  /* memory errors */
-
-  FT_ERRORDEF_( Out_Of_Memory,                               0x40,
-                "out of memory" )
-  FT_ERRORDEF_( Unlisted_Object,                             0x41,
-                "unlisted object" )
-
-  /* stream errors */
-
-  FT_ERRORDEF_( Cannot_Open_Stream,                          0x51,
-                "cannot open stream" )
-  FT_ERRORDEF_( Invalid_Stream_Seek,                         0x52,
-                "invalid stream seek" )
-  FT_ERRORDEF_( Invalid_Stream_Skip,                         0x53,
-                "invalid stream skip" )
-  FT_ERRORDEF_( Invalid_Stream_Read,                         0x54,
-                "invalid stream read" )
-  FT_ERRORDEF_( Invalid_Stream_Operation,                    0x55,
-                "invalid stream operation" )
-  FT_ERRORDEF_( Invalid_Frame_Operation,                     0x56,
-                "invalid frame operation" )
-  FT_ERRORDEF_( Nested_Frame_Access,                         0x57,
-                "nested frame access" )
-  FT_ERRORDEF_( Invalid_Frame_Read,                          0x58,
-                "invalid frame read" )
-
-  /* raster errors */
-
-  FT_ERRORDEF_( Raster_Uninitialized,                        0x60,
-                "raster uninitialized" )
-  FT_ERRORDEF_( Raster_Corrupted,                            0x61,
-                "raster corrupted" )
-  FT_ERRORDEF_( Raster_Overflow,                             0x62,
-                "raster overflow" )
-  FT_ERRORDEF_( Raster_Negative_Height,                      0x63,
-                "negative height while rastering" )
-
-  /* cache errors */
-
-  FT_ERRORDEF_( Too_Many_Caches,                             0x70,
-                "too many registered caches" )
-
-  /* TrueType and SFNT errors */
-
-  FT_ERRORDEF_( Invalid_Opcode,                              0x80,
-                "invalid opcode" )
-  FT_ERRORDEF_( Too_Few_Arguments,                           0x81,
-                "too few arguments" )
-  FT_ERRORDEF_( Stack_Overflow,                              0x82,
-                "stack overflow" )
-  FT_ERRORDEF_( Code_Overflow,                               0x83,
-                "code overflow" )
-  FT_ERRORDEF_( Bad_Argument,                                0x84,
-                "bad argument" )
-  FT_ERRORDEF_( Divide_By_Zero,                              0x85,
-                "division by zero" )
-  FT_ERRORDEF_( Invalid_Reference,                           0x86,
-                "invalid reference" )
-  FT_ERRORDEF_( Debug_OpCode,                                0x87,
-                "found debug opcode" )
-  FT_ERRORDEF_( ENDF_In_Exec_Stream,                         0x88,
-                "found ENDF opcode in execution stream" )
-  FT_ERRORDEF_( Nested_DEFS,                                 0x89,
-                "nested DEFS" )
-  FT_ERRORDEF_( Invalid_CodeRange,                           0x8A,
-                "invalid code range" )
-  FT_ERRORDEF_( Execution_Too_Long,                          0x8B,
-                "execution context too long" )
-  FT_ERRORDEF_( Too_Many_Function_Defs,                      0x8C,
-                "too many function definitions" )
-  FT_ERRORDEF_( Too_Many_Instruction_Defs,                   0x8D,
-                "too many instruction definitions" )
-  FT_ERRORDEF_( Table_Missing,                               0x8E,
-                "SFNT font table missing" )
-  FT_ERRORDEF_( Horiz_Header_Missing,                        0x8F,
-                "horizontal header (hhea) table missing" )
-  FT_ERRORDEF_( Locations_Missing,                           0x90,
-                "locations (loca) table missing" )
-  FT_ERRORDEF_( Name_Table_Missing,                          0x91,
-                "name table missing" )
-  FT_ERRORDEF_( CMap_Table_Missing,                          0x92,
-                "character map (cmap) table missing" )
-  FT_ERRORDEF_( Hmtx_Table_Missing,                          0x93,
-                "horizontal metrics (hmtx) table missing" )
-  FT_ERRORDEF_( Post_Table_Missing,                          0x94,
-                "PostScript (post) table missing" )
-  FT_ERRORDEF_( Invalid_Horiz_Metrics,                       0x95,
-                "invalid horizontal metrics" )
-  FT_ERRORDEF_( Invalid_CharMap_Format,                      0x96,
-                "invalid character map (cmap) format" )
-  FT_ERRORDEF_( Invalid_PPem,                                0x97,
-                "invalid ppem value" )
-  FT_ERRORDEF_( Invalid_Vert_Metrics,                        0x98,
-                "invalid vertical metrics" )
-  FT_ERRORDEF_( Could_Not_Find_Context,                      0x99,
-                "could not find context" )
-  FT_ERRORDEF_( Invalid_Post_Table_Format,                   0x9A,
-                "invalid PostScript (post) table format" )
-  FT_ERRORDEF_( Invalid_Post_Table,                          0x9B,
-                "invalid PostScript (post) table" )
-  FT_ERRORDEF_( DEF_In_Glyf_Bytecode,                        0x9C,
-                "found FDEF or IDEF opcode in glyf bytecode" )
-  FT_ERRORDEF_( Missing_Bitmap,                              0x9D,
-                "missing bitmap in strike" )
-
-  /* CFF, CID, and Type 1 errors */
-
-  FT_ERRORDEF_( Syntax_Error,                                0xA0,
-                "opcode syntax error" )
-  FT_ERRORDEF_( Stack_Underflow,                             0xA1,
-                "argument stack underflow" )
-  FT_ERRORDEF_( Ignore,                                      0xA2,
-                "ignore" )
-  FT_ERRORDEF_( No_Unicode_Glyph_Name,                       0xA3,
-                "no Unicode glyph name found" )
-  FT_ERRORDEF_( Glyph_Too_Big,                               0xA4,
-                "glyph too big for hinting" )
-
-  /* BDF errors */
-
-  FT_ERRORDEF_( Missing_Startfont_Field,                     0xB0,
-                "`STARTFONT' field missing" )
-  FT_ERRORDEF_( Missing_Font_Field,                          0xB1,
-                "`FONT' field missing" )
-  FT_ERRORDEF_( Missing_Size_Field,                          0xB2,
-                "`SIZE' field missing" )
-  FT_ERRORDEF_( Missing_Fontboundingbox_Field,               0xB3,
-                "`FONTBOUNDINGBOX' field missing" )
-  FT_ERRORDEF_( Missing_Chars_Field,                         0xB4,
-                "`CHARS' field missing" )
-  FT_ERRORDEF_( Missing_Startchar_Field,                     0xB5,
-                "`STARTCHAR' field missing" )
-  FT_ERRORDEF_( Missing_Encoding_Field,                      0xB6,
-                "`ENCODING' field missing" )
-  FT_ERRORDEF_( Missing_Bbx_Field,                           0xB7,
-                "`BBX' field missing" )
-  FT_ERRORDEF_( Bbx_Too_Big,                                 0xB8,
-                "`BBX' too big" )
-  FT_ERRORDEF_( Corrupted_Font_Header,                       0xB9,
-                "Font header corrupted or missing fields" )
-  FT_ERRORDEF_( Corrupted_Font_Glyphs,                       0xBA,
-                "Font glyphs corrupted or missing fields" )
-
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- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-error_enumerations.html b/ThirdParty/freetype/docs/reference/site/ft2-error_enumerations.html deleted file mode 100644 index 8495a89..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-error_enumerations.html +++ /dev/null @@ -1,1241 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Error Enumerations - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Error Codes » Error Enumerations

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-

Error Enumerations

-

Synopsis

-

The header file fterrors.h (which is automatically included by freetype.h defines the handling of FreeType's enumeration constants. It can also be used to generate error message strings with a small macro trick explained below.

-

Error Formats

-

The configuration macro FT_CONFIG_OPTION_USE_MODULE_ERRORS can be defined in ftoption.h in order to make the higher byte indicate the module where the error has happened (this is not compatible with standard builds of FreeType 2, however). See the file ftmoderr.h for more details.

-

Error Message Strings

-

Error definitions are set up with special macros that allow client applications to build a table of error message strings. The strings are not included in a normal build of FreeType 2 to save space (most client applications do not use them).

-

To do so, you have to define the following macros before including this file. -

  FT_ERROR_START_LIST
-

-

This macro is called before anything else to define the start of the error list. It is followed by several FT_ERROR_DEF calls. -

  FT_ERROR_DEF( e, v, s )
-

-

This macro is called to define one single error. ‘e’ is the error code identifier (e.g., Invalid_Argument), ‘v’ is the error's numerical value, and ‘s’ is the corresponding error string. -

  FT_ERROR_END_LIST
-

-

This macro ends the list.

-

Additionally, you have to undefine FTERRORS_H_ before #including this file.

-

Here is a simple example. -

  #undef FTERRORS_H_
-  #define FT_ERRORDEF( e, v, s )  { e, s },
-  #define FT_ERROR_START_LIST     {
-  #define FT_ERROR_END_LIST       { 0, NULL } };
-
-  const struct
-  {
-    int          err_code;
-    const char*  err_msg;
-  } ft_errors[] =
-
-  #include FT_ERRORS_H
-

-

An alternative to using an array is a switch statement. -

  #undef FTERRORS_H_
-  #define FT_ERROR_START_LIST     switch ( error_code ) {
-  #define FT_ERRORDEF( e, v, s )    case v: return s;
-  #define FT_ERROR_END_LIST       }
-

-

If you use FT_CONFIG_OPTION_USE_MODULE_ERRORS, error_code should be replaced with FT_ERROR_BASE(error_code) in the last example.

-

FT_Error_String

-

Defined in FT_ERRORS_H (freetype/fterrors.h).

-
-
-  FT_EXPORT( const char* )
-  FT_Error_String( FT_Error  error_code );
-
-#endif /* FT_ERR_PROTOS_DEFINED */
-
-#endif /* FT_INCLUDE_ERR_PROTOS */
-
-#endif /* !(FTERRORS_H_ && __FTERRORS_H__) */
-
-
-/* END */
-
-
- -

Retrieve the description of a valid FreeType error code.

-

input

- - - -
error_code -

A valid FreeType error code.

-
- -

return

- -

A C string or NULL, if any error occurred.

-

note

- -

FreeType has to be compiled with FT_CONFIG_OPTION_ERROR_STRINGS or FT_DEBUG_LEVEL_ERROR to get meaningful descriptions. ‘error_string’ will be NULL otherwise.

-

Module identification will be ignored: -

  strcmp( FT_Error_String(  FT_Err_Unknown_File_Format ),
-          FT_Error_String( BDF_Err_Unknown_File_Format ) ) == 0;
-

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FreeType » Docs » Format-Specific API » Font Formats

-
-

Font Formats

-

Synopsis

-

The single function in this section can be used to get the font format. Note that this information is not needed normally; however, there are special cases (like in PDF devices) where it is important to differentiate, in spite of FreeType's uniform API.

-

FT_Get_Font_Format

-

Defined in FT_FONT_FORMATS_H (freetype/ftfntfmt.h).

-
-
-  FT_EXPORT( const char* )
-  FT_Get_Font_Format( FT_Face  face );
-
-  /* deprecated */
-  FT_EXPORT( const char* )
-  FT_Get_X11_Font_Format( FT_Face  face );
-
-
- -

Return a string describing the format of a given face. Possible values are ‘TrueType’, ‘Type 1’, ‘BDF’, ‘PCF’, ‘Type 42’, ‘CID Type 1’, ‘CFF’, ‘PFR’, and ‘Windows FNT’.

-

The return value is suitable to be used as an X11 FONT_PROPERTY.

-

input

- - - -
face -

Input face handle.

-
- -

return

- -

Font format string. NULL in case of error.

-

note

- -

A deprecated name for the same function is FT_Get_X11_Font_Format.

-
- - - - - - - - - -
-
-
-
- - - - -
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FreeType » Docs » Format-Specific API » Gasp Table

-
-

Gasp Table

-

Synopsis

-

The function FT_Get_Gasp can be used to query a TrueType or OpenType font for specific entries in its ‘gasp’ table, if any. This is mainly useful when implementing native TrueType hinting with the bytecode interpreter to duplicate the Windows text rendering results.

-

FT_GASP_XXX

-

Defined in FT_GASP_H (freetype/ftgasp.h).

-
-
-#define FT_GASP_NO_TABLE               -1
-#define FT_GASP_DO_GRIDFIT           0x01
-#define FT_GASP_DO_GRAY              0x02
-#define FT_GASP_SYMMETRIC_GRIDFIT    0x04
-#define FT_GASP_SYMMETRIC_SMOOTHING  0x08
-
-
- -

A list of values and/or bit-flags returned by the FT_Get_Gasp function.

-

values

- - - - - - - -
FT_GASP_NO_TABLE -

This special value means that there is no GASP table in this face. It is up to the client to decide what to do.

-
FT_GASP_DO_GRIDFIT -

Grid-fitting and hinting should be performed at the specified ppem. This really means TrueType bytecode interpretation. If this bit is not set, no hinting gets applied.

-
FT_GASP_DO_GRAY -

Anti-aliased rendering should be performed at the specified ppem. If not set, do monochrome rendering.

-
FT_GASP_SYMMETRIC_SMOOTHING -

If set, smoothing along multiple axes must be used with ClearType.

-
FT_GASP_SYMMETRIC_GRIDFIT -

Grid-fitting must be used with ClearType's symmetric smoothing.

-
- -

note

- -

The bit-flags FT_GASP_DO_GRIDFIT and FT_GASP_DO_GRAY are to be used for standard font rasterization only. Independently of that, FT_GASP_SYMMETRIC_SMOOTHING and FT_GASP_SYMMETRIC_GRIDFIT are to be used if ClearType is enabled (and FT_GASP_DO_GRIDFIT and FT_GASP_DO_GRAY are consequently ignored).

-

‘ClearType’ is Microsoft's implementation of LCD rendering, partly protected by patents.

-

since

- -

2.3.0

-
- -

FT_Get_Gasp

-

Defined in FT_GASP_H (freetype/ftgasp.h).

-
-
-  FT_EXPORT( FT_Int )
-  FT_Get_Gasp( FT_Face  face,
-               FT_UInt  ppem );
-
-
- -

For a TrueType or OpenType font file, return the rasterizer behaviour flags from the font's ‘gasp’ table corresponding to a given character pixel size.

-

input

- - - - -
face -

The source face handle.

-
ppem -

The vertical character pixel size.

-
- -

return

- -

Bit flags (see FT_GASP_XXX), or FT_GASP_NO_TABLE if there is no ‘gasp’ table in the face.

-

note

- -

If you want to use the MM functionality of OpenType variation fonts (i.e., using FT_Set_Var_Design_Coordinates and friends), call this function after setting an instance since the return values can change.

-

since

- -

2.3.0

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FreeType » Docs » Core API » Glyph Management

-
-

Glyph Management

-

Synopsis

-

This section contains definitions used to manage glyph data through generic FT_Glyph objects. Each of them can contain a bitmap, a vector outline, or even images in other formats. These objects are detached from FT_Face, contrary to FT_GlyphSlot.

-

FT_Glyph

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef struct FT_GlyphRec_*  FT_Glyph;
-
-
- -

Handle to an object used to model generic glyph images. It is a pointer to the FT_GlyphRec structure and can contain a glyph bitmap or pointer.

-

note

- -

Glyph objects are not owned by the library. You must thus release them manually (through FT_Done_Glyph) before calling FT_Done_FreeType.

-
- -

FT_GlyphRec

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef struct  FT_GlyphRec_
-  {
-    FT_Library             library;
-    const FT_Glyph_Class*  clazz;
-    FT_Glyph_Format        format;
-    FT_Vector              advance;
-
-  } FT_GlyphRec;
-
-
- -

The root glyph structure contains a given glyph image plus its advance width in 16.16 fixed-point format.

-

fields

- - - - - - -
library -

A handle to the FreeType library object.

-
clazz -

A pointer to the glyph's class. Private.

-
format -

The format of the glyph's image.

-
advance -

A 16.16 vector that gives the glyph's advance width.

-
- -
- -

FT_BitmapGlyph

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef struct FT_BitmapGlyphRec_*  FT_BitmapGlyph;
-
-
- -

A handle to an object used to model a bitmap glyph image. This is a sub-class of FT_Glyph, and a pointer to FT_BitmapGlyphRec.

-
- -

FT_BitmapGlyphRec

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef struct  FT_BitmapGlyphRec_
-  {
-    FT_GlyphRec  root;
-    FT_Int       left;
-    FT_Int       top;
-    FT_Bitmap    bitmap;
-
-  } FT_BitmapGlyphRec;
-
-
- -

A structure used for bitmap glyph images. This really is a ‘sub-class’ of FT_GlyphRec.

-

fields

- - - - - - -
root -

The root FT_Glyph fields.

-
left -

The left-side bearing, i.e., the horizontal distance from the current pen position to the left border of the glyph bitmap.

-
top -

The top-side bearing, i.e., the vertical distance from the current pen position to the top border of the glyph bitmap. This distance is positive for upwards y!

-
bitmap -

A descriptor for the bitmap.

-
- -

note

- -

You can typecast an FT_Glyph to FT_BitmapGlyph if you have glyph->format == FT_GLYPH_FORMAT_BITMAP. This lets you access the bitmap's contents easily.

-

The corresponding pixel buffer is always owned by FT_BitmapGlyph and is thus created and destroyed with it.

-
- -

FT_OutlineGlyph

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef struct FT_OutlineGlyphRec_*  FT_OutlineGlyph;
-
-
- -

A handle to an object used to model an outline glyph image. This is a sub-class of FT_Glyph, and a pointer to FT_OutlineGlyphRec.

-
- -

FT_OutlineGlyphRec

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef struct  FT_OutlineGlyphRec_
-  {
-    FT_GlyphRec  root;
-    FT_Outline   outline;
-
-  } FT_OutlineGlyphRec;
-
-
- -

A structure used for outline (vectorial) glyph images. This really is a ‘sub-class’ of FT_GlyphRec.

-

fields

- - - - -
root -

The root FT_Glyph fields.

-
outline -

A descriptor for the outline.

-
- -

note

- -

You can typecast an FT_Glyph to FT_OutlineGlyph if you have glyph->format == FT_GLYPH_FORMAT_OUTLINE. This lets you access the outline's content easily.

-

As the outline is extracted from a glyph slot, its coordinates are expressed normally in 26.6 pixels, unless the flag FT_LOAD_NO_SCALE was used in FT_Load_Glyph() or FT_Load_Char().

-

The outline's tables are always owned by the object and are destroyed with it.

-
- -

FT_New_Glyph

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Glyph( FT_Library       library,
-                FT_Glyph_Format  format,
-                FT_Glyph         *aglyph );
-
-
- -

A function used to create a new empty glyph image. Note that the created FT_Glyph object must be released with FT_Done_Glyph.

-

input

- - - - -
library -

A handle to the FreeType library object.

-
format -

The format of the glyph's image.

-
- -

output

- - - -
aglyph -

A handle to the glyph object.

-
- -

return

- -

FreeType error code. 0 means success.

-

since

- -

2.10

-
- -

FT_Get_Glyph

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Glyph( FT_GlyphSlot  slot,
-                FT_Glyph     *aglyph );
-
-
- -

A function used to extract a glyph image from a slot. Note that the created FT_Glyph object must be released with FT_Done_Glyph.

-

input

- - - -
slot -

A handle to the source glyph slot.

-
- -

output

- - - -
aglyph -

A handle to the glyph object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Because *aglyph->advance.x and *aglyph->advance.y are 16.16 fixed-point numbers, slot->advance.x and slot->advance.y (which are in 26.6 fixed-point format) must be in the range ]-32768;32768[.

-
- -

FT_Glyph_Copy

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Glyph_Copy( FT_Glyph   source,
-                 FT_Glyph  *target );
-
-
- -

A function used to copy a glyph image. Note that the created FT_Glyph object must be released with FT_Done_Glyph.

-

input

- - - -
source -

A handle to the source glyph object.

-
- -

output

- - - -
target -

A handle to the target glyph object. 0 in case of error.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Glyph_Transform

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Glyph_Transform( FT_Glyph    glyph,
-                      FT_Matrix*  matrix,
-                      FT_Vector*  delta );
-
-
- -

Transform a glyph image if its format is scalable.

-

inout

- - - -
glyph -

A handle to the target glyph object.

-
- -

input

- - - - -
matrix -

A pointer to a 2x2 matrix to apply.

-
delta -

A pointer to a 2d vector to apply. Coordinates are expressed in 1/64th of a pixel.

-
- -

return

- -

FreeType error code (if not 0, the glyph format is not scalable).

-

note

- -

The 2x2 transformation matrix is also applied to the glyph's advance vector.

-
- -

FT_Glyph_BBox_Mode

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  typedef enum  FT_Glyph_BBox_Mode_
-  {
-    FT_GLYPH_BBOX_UNSCALED  = 0,
-    FT_GLYPH_BBOX_SUBPIXELS = 0,
-    FT_GLYPH_BBOX_GRIDFIT   = 1,
-    FT_GLYPH_BBOX_TRUNCATE  = 2,
-    FT_GLYPH_BBOX_PIXELS    = 3
-
-  } FT_Glyph_BBox_Mode;
-
-
-  /* these constants are deprecated; use the corresponding */
-  /* `FT_Glyph_BBox_Mode` values instead                   */
-#define ft_glyph_bbox_unscaled   FT_GLYPH_BBOX_UNSCALED
-#define ft_glyph_bbox_subpixels  FT_GLYPH_BBOX_SUBPIXELS
-#define ft_glyph_bbox_gridfit    FT_GLYPH_BBOX_GRIDFIT
-#define ft_glyph_bbox_truncate   FT_GLYPH_BBOX_TRUNCATE
-#define ft_glyph_bbox_pixels     FT_GLYPH_BBOX_PIXELS
-
-
- -

The mode how the values of FT_Glyph_Get_CBox are returned.

-

values

- - - - - - - -
FT_GLYPH_BBOX_UNSCALED -

Return unscaled font units.

-
FT_GLYPH_BBOX_SUBPIXELS -

Return unfitted 26.6 coordinates.

-
FT_GLYPH_BBOX_GRIDFIT -

Return grid-fitted 26.6 coordinates.

-
FT_GLYPH_BBOX_TRUNCATE -

Return coordinates in integer pixels.

-
FT_GLYPH_BBOX_PIXELS -

Return grid-fitted pixel coordinates.

-
- -
- -

FT_Glyph_Get_CBox

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( void )
-  FT_Glyph_Get_CBox( FT_Glyph  glyph,
-                     FT_UInt   bbox_mode,
-                     FT_BBox  *acbox );
-
-
- -

Return a glyph's ‘control box’. The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs).

-

Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the ‘ftbbox’ component, which is dedicated to this single task.

-

input

- - - - -
glyph -

A handle to the source glyph object.

-
mode -

The mode that indicates how to interpret the returned bounding box values.

-
- -

output

- - - -
acbox -

The glyph coordinate bounding box. Coordinates are expressed in 1/64th of pixels if it is grid-fitted.

-
- -

note

- -

Coordinates are relative to the glyph origin, using the y upwards convention.

-

If the glyph has been loaded with FT_LOAD_NO_SCALE, bbox_mode must be set to FT_GLYPH_BBOX_UNSCALED to get unscaled font units in 26.6 pixel format. The value FT_GLYPH_BBOX_SUBPIXELS is another name for this constant.

-

If the font is tricky and the glyph has been loaded with FT_LOAD_NO_SCALE, the resulting CBox is meaningless. To get reasonable values for the CBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the CBox, which can be eventually converted back to font units.

-

Note that the maximum coordinates are exclusive, which means that one can compute the width and height of the glyph image (be it in integer or 26.6 pixels) as: -

  width  = bbox.xMax - bbox.xMin;
-  height = bbox.yMax - bbox.yMin;
-

-

Note also that for 26.6 coordinates, if bbox_mode is set to FT_GLYPH_BBOX_GRIDFIT, the coordinates will also be grid-fitted, which corresponds to: -

  bbox.xMin = FLOOR(bbox.xMin);
-  bbox.yMin = FLOOR(bbox.yMin);
-  bbox.xMax = CEILING(bbox.xMax);
-  bbox.yMax = CEILING(bbox.yMax);
-

-

To get the bbox in pixel coordinates, set bbox_mode to FT_GLYPH_BBOX_TRUNCATE.

-

To get the bbox in grid-fitted pixel coordinates, set bbox_mode to FT_GLYPH_BBOX_PIXELS.

-
- -

FT_Glyph_To_Bitmap

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Glyph_To_Bitmap( FT_Glyph*       the_glyph,
-                      FT_Render_Mode  render_mode,
-                      FT_Vector*      origin,
-                      FT_Bool         destroy );
-
-
- -

Convert a given glyph object to a bitmap glyph object.

-

inout

- - - -
the_glyph -

A pointer to a handle to the target glyph.

-
- -

input

- - - - - -
render_mode -

An enumeration that describes how the data is rendered.

-
origin -

A pointer to a vector used to translate the glyph image before rendering. Can be 0 (if no translation). The origin is expressed in 26.6 pixels.

-
destroy -

A boolean that indicates that the original glyph image should be destroyed by this function. It is never destroyed in case of error.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function does nothing if the glyph format isn't scalable.

-

The glyph image is translated with the origin vector before rendering.

-

The first parameter is a pointer to an FT_Glyph handle, that will be replaced by this function (with newly allocated data). Typically, you would use (omitting error handling): -

  FT_Glyph        glyph;
-  FT_BitmapGlyph  glyph_bitmap;
-
-
-  // load glyph
-  error = FT_Load_Char( face, glyph_index, FT_LOAD_DEFAULT );
-
-  // extract glyph image
-  error = FT_Get_Glyph( face->glyph, &glyph );
-
-  // convert to a bitmap (default render mode + destroying old)
-  if ( glyph->format != FT_GLYPH_FORMAT_BITMAP )
-  {
-    error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_NORMAL,
-                                  0, 1 );
-    if ( error ) // `glyph' unchanged
-      ...
-  }
-
-  // access bitmap content by typecasting
-  glyph_bitmap = (FT_BitmapGlyph)glyph;
-
-  // do funny stuff with it, like blitting/drawing
-  ...
-
-  // discard glyph image (bitmap or not)
-  FT_Done_Glyph( glyph );
-

-

Here is another example, again without error handling: -

  FT_Glyph  glyphs[MAX_GLYPHS]
-
-
-  ...
-
-  for ( idx = 0; i < MAX_GLYPHS; i++ )
-    error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT ) ||
-            FT_Get_Glyph ( face->glyph, &glyphs[idx] );
-
-  ...
-
-  for ( idx = 0; i < MAX_GLYPHS; i++ )
-  {
-    FT_Glyph  bitmap = glyphs[idx];
-
-
-    ...
-
-    // after this call, `bitmap' no longer points into
-    // the `glyphs' array (and the old value isn't destroyed)
-    FT_Glyph_To_Bitmap( &bitmap, FT_RENDER_MODE_MONO, 0, 0 );
-
-    ...
-
-    FT_Done_Glyph( bitmap );
-  }
-
-  ...
-
-  for ( idx = 0; i < MAX_GLYPHS; i++ )
-    FT_Done_Glyph( glyphs[idx] );
-

-
- -

FT_Done_Glyph

-

Defined in FT_GLYPH_H (freetype/ftglyph.h).

-
-
-  FT_EXPORT( void )
-  FT_Done_Glyph( FT_Glyph  glyph );
-
-
- -

Destroy a given glyph.

-

input

- - - -
glyph -

A handle to the target glyph object.

-
- -
- - - - - - - - - -
-
-
-
- - - - -
- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-glyph_stroker.html b/ThirdParty/freetype/docs/reference/site/ft2-glyph_stroker.html deleted file mode 100644 index dee1410..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-glyph_stroker.html +++ /dev/null @@ -1,2154 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Glyph Stroker - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Support API » Glyph Stroker

-
-

Glyph Stroker

-

Synopsis

-

This component generates stroked outlines of a given vectorial glyph. It also allows you to retrieve the ‘outside’ and/or the ‘inside’ borders of the stroke.

-

This can be useful to generate ‘bordered’ glyph, i.e., glyphs displayed with a coloured (and anti-aliased) border around their shape.

-

FT_Stroker

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  typedef struct FT_StrokerRec_*  FT_Stroker;
-
-
- -

Opaque handle to a path stroker object.

-
- -

FT_Stroker_LineJoin

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  typedef enum  FT_Stroker_LineJoin_
-  {
-    FT_STROKER_LINEJOIN_ROUND          = 0,
-    FT_STROKER_LINEJOIN_BEVEL          = 1,
-    FT_STROKER_LINEJOIN_MITER_VARIABLE = 2,
-    FT_STROKER_LINEJOIN_MITER          = FT_STROKER_LINEJOIN_MITER_VARIABLE,
-    FT_STROKER_LINEJOIN_MITER_FIXED    = 3
-
-  } FT_Stroker_LineJoin;
-
-
- -

These values determine how two joining lines are rendered in a stroker.

-

values

- - - - - - - -
FT_STROKER_LINEJOIN_ROUND -

Used to render rounded line joins. Circular arcs are used to join two lines smoothly.

-
FT_STROKER_LINEJOIN_BEVEL -

Used to render beveled line joins. The outer corner of the joined lines is filled by enclosing the triangular region of the corner with a straight line between the outer corners of each stroke.

-
FT_STROKER_LINEJOIN_MITER_FIXED -

Used to render mitered line joins, with fixed bevels if the miter limit is exceeded. The outer edges of the strokes for the two segments are extended until they meet at an angle. If the segments meet at too sharp an angle (such that the miter would extend from the intersection of the segments a distance greater than the product of the miter limit value and the border radius), then a bevel join (see above) is used instead. This prevents long spikes being created. FT_STROKER_LINEJOIN_MITER_FIXED generates a miter line join as used in PostScript and PDF.

-
FT_STROKER_LINEJOIN_MITER_VARIABLE - -
FT_STROKER_LINEJOIN_MITER -

Used to render mitered line joins, with variable bevels if the miter limit is exceeded. The intersection of the strokes is clipped at a line perpendicular to the bisector of the angle between the strokes, at the distance from the intersection of the segments equal to the product of the miter limit value and the border radius. This prevents long spikes being created. FT_STROKER_LINEJOIN_MITER_VARIABLE generates a mitered line join as used in XPS. FT_STROKER_LINEJOIN_MITER is an alias for FT_STROKER_LINEJOIN_MITER_VARIABLE, retained for backward compatibility.

-
- -
- -

FT_Stroker_LineCap

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  typedef enum  FT_Stroker_LineCap_
-  {
-    FT_STROKER_LINECAP_BUTT = 0,
-    FT_STROKER_LINECAP_ROUND,
-    FT_STROKER_LINECAP_SQUARE
-
-  } FT_Stroker_LineCap;
-
-
- -

These values determine how the end of opened sub-paths are rendered in a stroke.

-

values

- - - - - -
FT_STROKER_LINECAP_BUTT -

The end of lines is rendered as a full stop on the last point itself.

-
FT_STROKER_LINECAP_ROUND -

The end of lines is rendered as a half-circle around the last point.

-
FT_STROKER_LINECAP_SQUARE -

The end of lines is rendered as a square around the last point.

-
- -
- -

FT_StrokerBorder

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  typedef enum  FT_StrokerBorder_
-  {
-    FT_STROKER_BORDER_LEFT = 0,
-    FT_STROKER_BORDER_RIGHT
-
-  } FT_StrokerBorder;
-
-
- -

These values are used to select a given stroke border in FT_Stroker_GetBorderCounts and FT_Stroker_ExportBorder.

-

values

- - - - -
FT_STROKER_BORDER_LEFT -

Select the left border, relative to the drawing direction.

-
FT_STROKER_BORDER_RIGHT -

Select the right border, relative to the drawing direction.

-
- -

note

- -

Applications are generally interested in the ‘inside’ and ‘outside’ borders. However, there is no direct mapping between these and the ‘left’ and ‘right’ ones, since this really depends on the glyph's drawing orientation, which varies between font formats.

-

You can however use FT_Outline_GetInsideBorder and FT_Outline_GetOutsideBorder to get these.

-
- -

FT_Outline_GetInsideBorder

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_StrokerBorder )
-  FT_Outline_GetInsideBorder( FT_Outline*  outline );
-
-
- -

Retrieve the FT_StrokerBorder value corresponding to the ‘inside’ borders of a given outline.

-

input

- - - -
outline -

The source outline handle.

-
- -

return

- -

The border index. FT_STROKER_BORDER_RIGHT for empty or invalid outlines.

-
- -

FT_Outline_GetOutsideBorder

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_StrokerBorder )
-  FT_Outline_GetOutsideBorder( FT_Outline*  outline );
-
-
- -

Retrieve the FT_StrokerBorder value corresponding to the ‘outside’ borders of a given outline.

-

input

- - - -
outline -

The source outline handle.

-
- -

return

- -

The border index. FT_STROKER_BORDER_LEFT for empty or invalid outlines.

-
- -

FT_Glyph_Stroke

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Glyph_Stroke( FT_Glyph    *pglyph,
-                   FT_Stroker   stroker,
-                   FT_Bool      destroy );
-
-
- -

Stroke a given outline glyph object with a given stroker.

-

inout

- - - -
pglyph -

Source glyph handle on input, new glyph handle on output.

-
- -

input

- - - - -
stroker -

A stroker handle.

-
destroy -

A Boolean. If 1, the source glyph object is destroyed on success.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The source glyph is untouched in case of error.

-

Adding stroke may yield a significantly wider and taller glyph depending on how large of a radius was used to stroke the glyph. You may need to manually adjust horizontal and vertical advance amounts to account for this added size.

-
- -

FT_Glyph_StrokeBorder

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Glyph_StrokeBorder( FT_Glyph    *pglyph,
-                         FT_Stroker   stroker,
-                         FT_Bool      inside,
-                         FT_Bool      destroy );
-
-
- -

Stroke a given outline glyph object with a given stroker, but only return either its inside or outside border.

-

inout

- - - -
pglyph -

Source glyph handle on input, new glyph handle on output.

-
- -

input

- - - - - -
stroker -

A stroker handle.

-
inside -

A Boolean. If 1, return the inside border, otherwise the outside border.

-
destroy -

A Boolean. If 1, the source glyph object is destroyed on success.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The source glyph is untouched in case of error.

-

Adding stroke may yield a significantly wider and taller glyph depending on how large of a radius was used to stroke the glyph. You may need to manually adjust horizontal and vertical advance amounts to account for this added size.

-
- -

FT_Stroker_New

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_New( FT_Library   library,
-                  FT_Stroker  *astroker );
-
-
- -

Create a new stroker object.

-

input

- - - -
library -

FreeType library handle.

-
- -

output

- - - -
astroker -

A new stroker object handle. NULL in case of error.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Stroker_Set

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( void )
-  FT_Stroker_Set( FT_Stroker           stroker,
-                  FT_Fixed             radius,
-                  FT_Stroker_LineCap   line_cap,
-                  FT_Stroker_LineJoin  line_join,
-                  FT_Fixed             miter_limit );
-
-
- -

Reset a stroker object's attributes.

-

input

- - - - - - - -
stroker -

The target stroker handle.

-
radius -

The border radius.

-
line_cap -

The line cap style.

-
line_join -

The line join style.

-
miter_limit -

The miter limit for the FT_STROKER_LINEJOIN_MITER_FIXED and FT_STROKER_LINEJOIN_MITER_VARIABLE line join styles, expressed as 16.16 fixed-point value.

-
- -

note

- -

The radius is expressed in the same units as the outline coordinates.

-

This function calls FT_Stroker_Rewind automatically.

-
- -

FT_Stroker_Rewind

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( void )
-  FT_Stroker_Rewind( FT_Stroker  stroker );
-
-
- -

Reset a stroker object without changing its attributes. You should call this function before beginning a new series of calls to FT_Stroker_BeginSubPath or FT_Stroker_EndSubPath.

-

input

- - - -
stroker -

The target stroker handle.

-
- -
- -

FT_Stroker_ParseOutline

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_ParseOutline( FT_Stroker   stroker,
-                           FT_Outline*  outline,
-                           FT_Bool      opened );
-
-
- -

A convenience function used to parse a whole outline with the stroker. The resulting outline(s) can be retrieved later by functions like FT_Stroker_GetCounts and FT_Stroker_Export.

-

input

- - - - - -
stroker -

The target stroker handle.

-
outline -

The source outline.

-
opened -

A boolean. If 1, the outline is treated as an open path instead of a closed one.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If opened is 0 (the default), the outline is treated as a closed path, and the stroker generates two distinct ‘border’ outlines.

-

If opened is 1, the outline is processed as an open path, and the stroker generates a single ‘stroke’ outline.

-

This function calls FT_Stroker_Rewind automatically.

-
- -

FT_Stroker_Done

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( void )
-  FT_Stroker_Done( FT_Stroker  stroker );
-
-
- -

Destroy a stroker object.

-

input

- - - -
stroker -

A stroker handle. Can be NULL.

-
- -
- -

FT_Stroker_BeginSubPath

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_BeginSubPath( FT_Stroker  stroker,
-                           FT_Vector*  to,
-                           FT_Bool     open );
-
-
- -

Start a new sub-path in the stroker.

-

input

- - - - - -
stroker -

The target stroker handle.

-
to -

A pointer to the start vector.

-
open -

A boolean. If 1, the sub-path is treated as an open one.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function is useful when you need to stroke a path that is not stored as an FT_Outline object.

-
- -

FT_Stroker_EndSubPath

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_EndSubPath( FT_Stroker  stroker );
-
-
- -

Close the current sub-path in the stroker.

-

input

- - - -
stroker -

The target stroker handle.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You should call this function after FT_Stroker_BeginSubPath. If the subpath was not ‘opened’, this function ‘draws’ a single line segment to the start position when needed.

-
- -

FT_Stroker_LineTo

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_LineTo( FT_Stroker  stroker,
-                     FT_Vector*  to );
-
-
- -

‘Draw’ a single line segment in the stroker's current sub-path, from the last position.

-

input

- - - - -
stroker -

The target stroker handle.

-
to -

A pointer to the destination point.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You should call this function between FT_Stroker_BeginSubPath and FT_Stroker_EndSubPath.

-
- -

FT_Stroker_ConicTo

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_ConicTo( FT_Stroker  stroker,
-                      FT_Vector*  control,
-                      FT_Vector*  to );
-
-
- -

‘Draw’ a single quadratic Bezier in the stroker's current sub-path, from the last position.

-

input

- - - - - -
stroker -

The target stroker handle.

-
control -

A pointer to a Bezier control point.

-
to -

A pointer to the destination point.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You should call this function between FT_Stroker_BeginSubPath and FT_Stroker_EndSubPath.

-
- -

FT_Stroker_CubicTo

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_CubicTo( FT_Stroker  stroker,
-                      FT_Vector*  control1,
-                      FT_Vector*  control2,
-                      FT_Vector*  to );
-
-
- -

‘Draw’ a single cubic Bezier in the stroker's current sub-path, from the last position.

-

input

- - - - - - -
stroker -

The target stroker handle.

-
control1 -

A pointer to the first Bezier control point.

-
control2 -

A pointer to second Bezier control point.

-
to -

A pointer to the destination point.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You should call this function between FT_Stroker_BeginSubPath and FT_Stroker_EndSubPath.

-
- -

FT_Stroker_GetBorderCounts

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_GetBorderCounts( FT_Stroker        stroker,
-                              FT_StrokerBorder  border,
-                              FT_UInt          *anum_points,
-                              FT_UInt          *anum_contours );
-
-
- -

Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export one of the ‘border’ or ‘stroke’ outlines generated by the stroker.

-

input

- - - - -
stroker -

The target stroker handle.

-
border -

The border index.

-
- -

output

- - - - -
anum_points -

The number of points.

-
anum_contours -

The number of contours.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

When an outline, or a sub-path, is ‘closed’, the stroker generates two independent ‘border’ outlines, named ‘left’ and ‘right’.

-

When the outline, or a sub-path, is ‘opened’, the stroker merges the ‘border’ outlines with caps. The ‘left’ border receives all points, while the ‘right’ border becomes empty.

-

Use the function FT_Stroker_GetCounts instead if you want to retrieve the counts associated to both borders.

-
- -

FT_Stroker_ExportBorder

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( void )
-  FT_Stroker_ExportBorder( FT_Stroker        stroker,
-                           FT_StrokerBorder  border,
-                           FT_Outline*       outline );
-
-
- -

Call this function after FT_Stroker_GetBorderCounts to export the corresponding border to your own FT_Outline structure.

-

Note that this function appends the border points and contours to your outline, but does not try to resize its arrays.

-

input

- - - - - -
stroker -

The target stroker handle.

-
border -

The border index.

-
outline -

The target outline handle.

-
- -

note

- -

Always call this function after FT_Stroker_GetBorderCounts to get sure that there is enough room in your FT_Outline object to receive all new data.

-

When an outline, or a sub-path, is ‘closed’, the stroker generates two independent ‘border’ outlines, named ‘left’ and ‘right’.

-

When the outline, or a sub-path, is ‘opened’, the stroker merges the ‘border’ outlines with caps. The ‘left’ border receives all points, while the ‘right’ border becomes empty.

-

Use the function FT_Stroker_Export instead if you want to retrieve all borders at once.

-
- -

FT_Stroker_GetCounts

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stroker_GetCounts( FT_Stroker  stroker,
-                        FT_UInt    *anum_points,
-                        FT_UInt    *anum_contours );
-
-
- -

Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export all points/borders from the stroked outline/path.

-

input

- - - -
stroker -

The target stroker handle.

-
- -

output

- - - - -
anum_points -

The number of points.

-
anum_contours -

The number of contours.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Stroker_Export

-

Defined in FT_STROKER_H (freetype/ftstroke.h).

-
-
-  FT_EXPORT( void )
-  FT_Stroker_Export( FT_Stroker   stroker,
-                     FT_Outline*  outline );
-
-
- -

Call this function after FT_Stroker_GetBorderCounts to export all borders to your own FT_Outline structure.

-

Note that this function appends the border points and contours to your outline, but does not try to resize its arrays.

-

input

- - - - -
stroker -

The target stroker handle.

-
outline -

The target outline handle.

-
- -
- - - - - - - - - -
-
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- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-glyph_variants.html b/ThirdParty/freetype/docs/reference/site/ft2-glyph_variants.html deleted file mode 100644 index 194c769..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-glyph_variants.html +++ /dev/null @@ -1,1399 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Unicode Variation Sequences - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Core API » Unicode Variation Sequences

-
-

Unicode Variation Sequences

-

Synopsis

-

Many characters, especially for CJK scripts, have variant forms. They are a sort of grey area somewhere between being totally irrelevant and semantically distinct; for this reason, the Unicode consortium decided to introduce Variation Sequences (VS), consisting of a Unicode base character and a variation selector instead of further extending the already huge number of characters.

-

Unicode maintains two different sets, namely ‘Standardized Variation Sequences’ and registered ‘Ideographic Variation Sequences’ (IVS), collected in the ‘Ideographic Variation Database’ (IVD).

-

https://unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt https://unicode.org/reports/tr37/ https://unicode.org/ivd/

-

To date (January 2017), the character with the most ideographic variations is U+9089, having 32 such IVS.

-

Three Mongolian Variation Selectors have the values U+180B-U+180D; 256 generic Variation Selectors are encoded in the ranges U+FE00-U+FE0F and U+E0100-U+E01EF. IVS currently use Variation Selectors from the range U+E0100-U+E01EF only.

-

A VS consists of the base character value followed by a single Variation Selector. For example, to get the first variation of U+9089, you have to write the character sequence U+9089 U+E0100.

-

Adobe and MS decided to support both standardized and ideographic VS with a new cmap subtable (format 14). It is an odd subtable because it is not a mapping of input code points to glyphs, but contains lists of all variations supported by the font.

-

A variation may be either ‘default’ or ‘non-default’ for a given font. A default variation is the one you will get for that code point if you look it up in the standard Unicode cmap. A non-default variation is a different glyph.

-

FT_Face_GetCharVariantIndex

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UInt )
-  FT_Face_GetCharVariantIndex( FT_Face   face,
-                               FT_ULong  charcode,
-                               FT_ULong  variantSelector );
-
-
- -

Return the glyph index of a given character code as modified by the variation selector.

-

input

- - - - - -
face -

A handle to the source face object.

-
charcode -

The character code point in Unicode.

-
variantSelector -

The Unicode code point of the variation selector.

-
- -

return

- -

The glyph index. 0 means either ‘undefined character code’, or ‘undefined selector code’, or ‘no variation selector cmap subtable’, or ‘current CharMap is not Unicode’.

-

note

- -

If you use FreeType to manipulate the contents of font files directly, be aware that the glyph index returned by this function doesn't always correspond to the internal indices used within the file. This is done to ensure that value 0 always corresponds to the ‘missing glyph’.

-

This function is only meaningful if a) the font has a variation selector cmap sub table, and b) the current charmap has a Unicode encoding.

-

since

- -

2.3.6

-
- -

FT_Face_GetCharVariantIsDefault

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Int )
-  FT_Face_GetCharVariantIsDefault( FT_Face   face,
-                                   FT_ULong  charcode,
-                                   FT_ULong  variantSelector );
-
-
- -

Check whether this variation of this Unicode character is the one to be found in the charmap.

-

input

- - - - - -
face -

A handle to the source face object.

-
charcode -

The character codepoint in Unicode.

-
variantSelector -

The Unicode codepoint of the variation selector.

-
- -

return

- -

1 if found in the standard (Unicode) cmap, 0 if found in the variation selector cmap, or -1 if it is not a variation.

-

note

- -

This function is only meaningful if the font has a variation selector cmap subtable.

-

since

- -

2.3.6

-
- -

FT_Face_GetVariantSelectors

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UInt32* )
-  FT_Face_GetVariantSelectors( FT_Face  face );
-
-
- -

Return a zero-terminated list of Unicode variation selectors found in the font.

-

input

- - - -
face -

A handle to the source face object.

-
- -

return

- -

A pointer to an array of selector code points, or NULL if there is no valid variation selector cmap subtable.

-

note

- -

The last item in the array is 0; the array is owned by the FT_Face object but can be overwritten or released on the next call to a FreeType function.

-

since

- -

2.3.6

-
- -

FT_Face_GetVariantsOfChar

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UInt32* )
-  FT_Face_GetVariantsOfChar( FT_Face   face,
-                             FT_ULong  charcode );
-
-
- -

Return a zero-terminated list of Unicode variation selectors found for the specified character code.

-

input

- - - - -
face -

A handle to the source face object.

-
charcode -

The character codepoint in Unicode.

-
- -

return

- -

A pointer to an array of variation selector code points that are active for the given character, or NULL if the corresponding list is empty.

-

note

- -

The last item in the array is 0; the array is owned by the FT_Face object but can be overwritten or released on the next call to a FreeType function.

-

since

- -

2.3.6

-
- -

FT_Face_GetCharsOfVariant

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_UInt32* )
-  FT_Face_GetCharsOfVariant( FT_Face   face,
-                             FT_ULong  variantSelector );
-
-
- -

Return a zero-terminated list of Unicode character codes found for the specified variation selector.

-

input

- - - - -
face -

A handle to the source face object.

-
variantSelector -

The variation selector code point in Unicode.

-
- -

return

- -

A list of all the code points that are specified by this selector (both default and non-default codes are returned) or NULL if there is no valid cmap or the variation selector is invalid.

-

note

- -

The last item in the array is 0; the array is owned by the FT_Face object but can be overwritten or released on the next call to a FreeType function.

-

since

- -

2.3.6

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- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-gx_validation.html b/ThirdParty/freetype/docs/reference/site/ft2-gx_validation.html deleted file mode 100644 index 36fe2e2..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-gx_validation.html +++ /dev/null @@ -1,1482 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - TrueTypeGX/AAT Validation - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Miscellaneous » TrueTypeGX/AAT Validation

-
-

TrueTypeGX/AAT Validation

-

Synopsis

-

This section contains the declaration of functions to validate some TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop, lcar).

-

FT_TrueTypeGX_Validate

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_TrueTypeGX_Validate( FT_Face   face,
-                          FT_UInt   validation_flags,
-                          FT_Bytes  tables[FT_VALIDATE_GX_LENGTH],
-                          FT_UInt   table_length );
-
-
- -

Validate various TrueTypeGX tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).

-

input

- - - - - -
face -

A handle to the input face.

-
validation_flags -

A bit field that specifies the tables to be validated. See FT_VALIDATE_GXXXX for possible values.

-
table_length -

The size of the tables array. Normally, FT_VALIDATE_GX_LENGTH should be passed.

-
- -

output

- - - -
tables -

The array where all validated sfnt tables are stored. The array itself must be allocated by a client.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function only works with TrueTypeGX fonts, returning an error otherwise.

-

After use, the application should deallocate the buffers pointed to by each tables element, by calling FT_TrueTypeGX_Free. A NULL value indicates that the table either doesn't exist in the font, the application hasn't asked for validation, or the validator doesn't have the ability to validate the sfnt table.

-
- -

FT_TrueTypeGX_Free

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-  FT_EXPORT( void )
-  FT_TrueTypeGX_Free( FT_Face   face,
-                      FT_Bytes  table );
-
-
- -

Free the buffer allocated by TrueTypeGX validator.

-

input

- - - - -
face -

A handle to the input face.

-
table -

The pointer to the buffer allocated by FT_TrueTypeGX_Validate.

-
- -

note

- -

This function must be used to free the buffer allocated by FT_TrueTypeGX_Validate only.

-
- -

FT_ClassicKern_Validate

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_ClassicKern_Validate( FT_Face    face,
-                           FT_UInt    validation_flags,
-                           FT_Bytes  *ckern_table );
-
-
- -

Validate classic (16-bit format) kern table to assure that the offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).

-

The ‘kern’ table validator in FT_TrueTypeGX_Validate deals with both the new 32-bit format and the classic 16-bit format, while FT_ClassicKern_Validate only supports the classic 16-bit format.

-

input

- - - - -
face -

A handle to the input face.

-
validation_flags -

A bit field that specifies the dialect to be validated. See FT_VALIDATE_CKERNXXX for possible values.

-
- -

output

- - - -
ckern_table -

A pointer to the kern table.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

After use, the application should deallocate the buffers pointed to by ckern_table, by calling FT_ClassicKern_Free. A NULL value indicates that the table doesn't exist in the font.

-
- -

FT_ClassicKern_Free

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-  FT_EXPORT( void )
-  FT_ClassicKern_Free( FT_Face   face,
-                       FT_Bytes  table );
-
-
- -

Free the buffer allocated by classic Kern validator.

-

input

- - - - -
face -

A handle to the input face.

-
table -

The pointer to the buffer that is allocated by FT_ClassicKern_Validate.

-
- -

note

- -

This function must be used to free the buffer allocated by FT_ClassicKern_Validate only.

-
- -

FT_VALIDATE_GX_LENGTH

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-#define FT_VALIDATE_GX_LENGTH  ( FT_VALIDATE_GX_LAST_INDEX + 1 )
-
-
- -

The number of tables checked in this module. Use it as a parameter for the table-length argument of function FT_TrueTypeGX_Validate.

-
- -

FT_VALIDATE_GXXXX

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-#define FT_VALIDATE_feat  FT_VALIDATE_GX_BITFIELD( feat )
-#define FT_VALIDATE_mort  FT_VALIDATE_GX_BITFIELD( mort )
-#define FT_VALIDATE_morx  FT_VALIDATE_GX_BITFIELD( morx )
-#define FT_VALIDATE_bsln  FT_VALIDATE_GX_BITFIELD( bsln )
-#define FT_VALIDATE_just  FT_VALIDATE_GX_BITFIELD( just )
-#define FT_VALIDATE_kern  FT_VALIDATE_GX_BITFIELD( kern )
-#define FT_VALIDATE_opbd  FT_VALIDATE_GX_BITFIELD( opbd )
-#define FT_VALIDATE_trak  FT_VALIDATE_GX_BITFIELD( trak )
-#define FT_VALIDATE_prop  FT_VALIDATE_GX_BITFIELD( prop )
-#define FT_VALIDATE_lcar  FT_VALIDATE_GX_BITFIELD( lcar )
-
-#define FT_VALIDATE_GX  ( FT_VALIDATE_feat | \
-                          FT_VALIDATE_mort | \
-                          FT_VALIDATE_morx | \
-                          FT_VALIDATE_bsln | \
-                          FT_VALIDATE_just | \
-                          FT_VALIDATE_kern | \
-                          FT_VALIDATE_opbd | \
-                          FT_VALIDATE_trak | \
-                          FT_VALIDATE_prop | \
-                          FT_VALIDATE_lcar )
-
-
- -

A list of bit-field constants used with FT_TrueTypeGX_Validate to indicate which TrueTypeGX/AAT Type tables should be validated.

-

values

- - - - - - - - - - - - - -
FT_VALIDATE_feat -

Validate ‘feat’ table.

-
FT_VALIDATE_mort -

Validate ‘mort’ table.

-
FT_VALIDATE_morx -

Validate ‘morx’ table.

-
FT_VALIDATE_bsln -

Validate ‘bsln’ table.

-
FT_VALIDATE_just -

Validate ‘just’ table.

-
FT_VALIDATE_kern -

Validate ‘kern’ table.

-
FT_VALIDATE_opbd -

Validate ‘opbd’ table.

-
FT_VALIDATE_trak -

Validate ‘trak’ table.

-
FT_VALIDATE_prop -

Validate ‘prop’ table.

-
FT_VALIDATE_lcar -

Validate ‘lcar’ table.

-
FT_VALIDATE_GX -

Validate all TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop and lcar).

-
- -
- -

FT_VALIDATE_CKERNXXX

-

Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).

-
-
-#define FT_VALIDATE_MS     ( FT_VALIDATE_GX_START << 0 )
-#define FT_VALIDATE_APPLE  ( FT_VALIDATE_GX_START << 1 )
-
-#define FT_VALIDATE_CKERN  ( FT_VALIDATE_MS | FT_VALIDATE_APPLE )
-
-
- -

A list of bit-field constants used with FT_ClassicKern_Validate to indicate the classic kern dialect or dialects. If the selected type doesn't fit, FT_ClassicKern_Validate regards the table as invalid.

-

values

- - - - - -
FT_VALIDATE_MS -

Handle the ‘kern’ table as a classic Microsoft kern table.

-
FT_VALIDATE_APPLE -

Handle the ‘kern’ table as a classic Apple kern table.

-
FT_VALIDATE_CKERN -

Handle the ‘kern’ as either classic Apple or Microsoft kern table.

-
- -
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-
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FreeType » Docs » Support API » GZIP Streams

-
-

GZIP Streams

-

Synopsis

-

This section contains the declaration of Gzip-specific functions.

-

FT_Stream_OpenGzip

-

Defined in FT_GZIP_H (freetype/ftgzip.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stream_OpenGzip( FT_Stream  stream,
-                      FT_Stream  source );
-
-
- -

Open a new stream to parse gzip-compressed font files. This is mainly used to support the compressed *.pcf.gz fonts that come with XFree86.

-

input

- - - - -
stream -

The target embedding stream.

-
source -

The source stream.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The source stream must be opened before calling this function.

-

Calling the internal function FT_Stream_Close on the new stream will not call FT_Stream_Close on the source stream. None of the stream objects will be released to the heap.

-

The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream.

-

In certain builds of the library, gzip compression recognition is automatically handled when calling FT_New_Face or FT_Open_Face. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a gzipped stream from it and re-open the face with it.

-

This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with zlib support.

-
- -

FT_Gzip_Uncompress

-

Defined in FT_GZIP_H (freetype/ftgzip.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Gzip_Uncompress( FT_Memory       memory,
-                      FT_Byte*        output,
-                      FT_ULong*       output_len,
-                      const FT_Byte*  input,
-                      FT_ULong        input_len );
-
-
- -

Decompress a zipped input buffer into an output buffer. This function is modeled after zlib's uncompress function.

-

input

- - - - - -
memory -

A FreeType memory handle.

-
input -

The input buffer.

-
input_len -

The length of the input buffer.

-
- -

output

- - - -
output -

The output buffer.

-
- -

inout

- - - -
output_len -

Before calling the function, this is the total size of the output buffer, which must be large enough to hold the entire uncompressed data (so the size of the uncompressed data must be known in advance). After calling the function, output_len is the size of the used data in output.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with zlib support.

-

since

- -

2.5.1

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FreeType » Docs » Core API » Header File Macros

-
-

Header File Macros

-

Synopsis

-

The following macros are defined to the name of specific FreeType 2 header files. They can be used directly in #include statements as in: -

  #include FT_FREETYPE_H
-  #include FT_MULTIPLE_MASTERS_H
-  #include FT_GLYPH_H
-

-

There are several reasons why we are now using macros to name public header files. The first one is that such macros are not limited to the infamous 8.3 naming rule required by DOS (and FT_MULTIPLE_MASTERS_H is a lot more meaningful than ftmm.h).

-

The second reason is that it allows for more flexibility in the way FreeType 2 is installed on a given system.

-

FT_CONFIG_CONFIG_H

-
-
-#ifndef FT_CONFIG_CONFIG_H
-#define FT_CONFIG_CONFIG_H  <freetype/config/ftconfig.h>
-#endif
-
-
- -

A macro used in #include statements to name the file containing FreeType 2 configuration data.

-
- -

FT_CONFIG_STANDARD_LIBRARY_H

-
-
-#ifndef FT_CONFIG_STANDARD_LIBRARY_H
-#define FT_CONFIG_STANDARD_LIBRARY_H  <freetype/config/ftstdlib.h>
-#endif
-
-
- -

A macro used in #include statements to name the file containing FreeType 2 interface to the standard C library functions.

-
- -

FT_CONFIG_OPTIONS_H

-
-
-#ifndef FT_CONFIG_OPTIONS_H
-#define FT_CONFIG_OPTIONS_H  <freetype/config/ftoption.h>
-#endif
-
-
- -

A macro used in #include statements to name the file containing FreeType 2 project-specific configuration options.

-
- -

FT_CONFIG_MODULES_H

-
-
-#ifndef FT_CONFIG_MODULES_H
-#define FT_CONFIG_MODULES_H  <freetype/config/ftmodule.h>
-#endif
-
-
- -

A macro used in #include statements to name the file containing the list of FreeType 2 modules that are statically linked to new library instances in FT_Init_FreeType.

-
- -

FT_FREETYPE_H

-
-
-#define FT_FREETYPE_H  <freetype/freetype.h>
-
-
- -

A macro used in #include statements to name the file containing the base FreeType 2 API.

-
- -

FT_ERRORS_H

-
-
-#define FT_ERRORS_H  <freetype/fterrors.h>
-
-
- -

A macro used in #include statements to name the file containing the list of FreeType 2 error codes (and messages).

-

It is included by FT_FREETYPE_H.

-
- -

FT_MODULE_ERRORS_H

-
-
-#define FT_MODULE_ERRORS_H  <freetype/ftmoderr.h>
-
-
- -

A macro used in #include statements to name the file containing the list of FreeType 2 module error offsets (and messages).

-
- -

FT_SYSTEM_H

-
-
-#define FT_SYSTEM_H  <freetype/ftsystem.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 interface to low-level operations (i.e., memory management and stream i/o).

-

It is included by FT_FREETYPE_H.

-
- -

FT_IMAGE_H

-
-
-#define FT_IMAGE_H  <freetype/ftimage.h>
-
-
- -

A macro used in #include statements to name the file containing type definitions related to glyph images (i.e., bitmaps, outlines, scan-converter parameters).

-

It is included by FT_FREETYPE_H.

-
- -

FT_TYPES_H

-
-
-#define FT_TYPES_H  <freetype/fttypes.h>
-
-
- -

A macro used in #include statements to name the file containing the basic data types defined by FreeType 2.

-

It is included by FT_FREETYPE_H.

-
- -

FT_LIST_H

-
-
-#define FT_LIST_H  <freetype/ftlist.h>
-
-
- -

A macro used in #include statements to name the file containing the list management API of FreeType 2.

-

(Most applications will never need to include this file.)

-
- -

FT_OUTLINE_H

-
-
-#define FT_OUTLINE_H  <freetype/ftoutln.h>
-
-
- -

A macro used in #include statements to name the file containing the scalable outline management API of FreeType 2.

-
- -

FT_SIZES_H

-
-
-#define FT_SIZES_H  <freetype/ftsizes.h>
-
-
- -

A macro used in #include statements to name the file containing the API which manages multiple FT_Size objects per face.

-
- -

FT_MODULE_H

-
-
-#define FT_MODULE_H  <freetype/ftmodapi.h>
-
-
- -

A macro used in #include statements to name the file containing the module management API of FreeType 2.

-
- -

FT_RENDER_H

-
-
-#define FT_RENDER_H  <freetype/ftrender.h>
-
-
- -

A macro used in #include statements to name the file containing the renderer module management API of FreeType 2.

-
- -

FT_DRIVER_H

-
-
-#define FT_DRIVER_H  <freetype/ftdriver.h>
-
-
- -

A macro used in #include statements to name the file containing structures and macros related to the driver modules.

-
- -

FT_AUTOHINTER_H

-
-
-#define FT_AUTOHINTER_H  FT_DRIVER_H
-
-
- -

A macro used in #include statements to name the file containing structures and macros related to the auto-hinting module.

-

Deprecated since version 2.9; use FT_DRIVER_H instead.

-
- -

FT_CFF_DRIVER_H

-
-
-#define FT_CFF_DRIVER_H  FT_DRIVER_H
-
-
- -

A macro used in #include statements to name the file containing structures and macros related to the CFF driver module.

-

Deprecated since version 2.9; use FT_DRIVER_H instead.

-
- -

FT_TRUETYPE_DRIVER_H

-
-
-#define FT_TRUETYPE_DRIVER_H  FT_DRIVER_H
-
-
- -

A macro used in #include statements to name the file containing structures and macros related to the TrueType driver module.

-

Deprecated since version 2.9; use FT_DRIVER_H instead.

-
- -

FT_PCF_DRIVER_H

-
-
-#define FT_PCF_DRIVER_H  FT_DRIVER_H
-
-
- -

A macro used in #include statements to name the file containing structures and macros related to the PCF driver module.

-

Deprecated since version 2.9; use FT_DRIVER_H instead.

-
- -

FT_TYPE1_TABLES_H

-
-
-#define FT_TYPE1_TABLES_H  <freetype/t1tables.h>
-
-
- -

A macro used in #include statements to name the file containing the types and API specific to the Type 1 format.

-
- -

FT_TRUETYPE_IDS_H

-
-
-#define FT_TRUETYPE_IDS_H  <freetype/ttnameid.h>
-
-
- -

A macro used in #include statements to name the file containing the enumeration values which identify name strings, languages, encodings, etc. This file really contains a large set of constant macro definitions, taken from the TrueType and OpenType specifications.

-
- -

FT_TRUETYPE_TABLES_H

-
-
-#define FT_TRUETYPE_TABLES_H  <freetype/tttables.h>
-
-
- -

A macro used in #include statements to name the file containing the types and API specific to the TrueType (as well as OpenType) format.

-
- -

FT_TRUETYPE_TAGS_H

-
-
-#define FT_TRUETYPE_TAGS_H  <freetype/tttags.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of TrueType four-byte ‘tags’ which identify blocks in SFNT-based font formats (i.e., TrueType and OpenType).

-
- -

FT_BDF_H

-
-
-#define FT_BDF_H  <freetype/ftbdf.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of an API which accesses BDF-specific strings from a face.

-
- -

FT_CID_H

-
-
-#define FT_CID_H  <freetype/ftcid.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of an API which access CID font information from a face.

-
- -

FT_GZIP_H

-
-
-#define FT_GZIP_H  <freetype/ftgzip.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of an API which supports gzip-compressed files.

-
- -

FT_LZW_H

-
-
-#define FT_LZW_H  <freetype/ftlzw.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of an API which supports LZW-compressed files.

-
- -

FT_BZIP2_H

-
-
-#define FT_BZIP2_H  <freetype/ftbzip2.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of an API which supports bzip2-compressed files.

-
- -

FT_WINFONTS_H

-
-
-#define FT_WINFONTS_H   <freetype/ftwinfnt.h>
-
-
- -

A macro used in #include statements to name the file containing the definitions of an API which supports Windows FNT files.

-
- -

FT_GLYPH_H

-
-
-#define FT_GLYPH_H  <freetype/ftglyph.h>
-
-
- -

A macro used in #include statements to name the file containing the API of the optional glyph management component.

-
- -

FT_BITMAP_H

-
-
-#define FT_BITMAP_H  <freetype/ftbitmap.h>
-
-
- -

A macro used in #include statements to name the file containing the API of the optional bitmap conversion component.

-
- -

FT_BBOX_H

-
-
-#define FT_BBOX_H  <freetype/ftbbox.h>
-
-
- -

A macro used in #include statements to name the file containing the API of the optional exact bounding box computation routines.

-
- -

FT_CACHE_H

-
-
-#define FT_CACHE_H  <freetype/ftcache.h>
-
-
- -

A macro used in #include statements to name the file containing the API of the optional FreeType 2 cache sub-system.

-
- -

FT_MAC_H

-
-
-#define FT_MAC_H  <freetype/ftmac.h>
-
-
- -

A macro used in #include statements to name the file containing the Macintosh-specific FreeType 2 API. The latter is used to access fonts embedded in resource forks.

-

This header file must be explicitly included by client applications compiled on the Mac (note that the base API still works though).

-
- -

FT_MULTIPLE_MASTERS_H

-
-
-#define FT_MULTIPLE_MASTERS_H  <freetype/ftmm.h>
-
-
- -

A macro used in #include statements to name the file containing the optional multiple-masters management API of FreeType 2.

-
- -

FT_SFNT_NAMES_H

-
-
-#define FT_SFNT_NAMES_H  <freetype/ftsnames.h>
-
-
- -

A macro used in #include statements to name the file containing the optional FreeType 2 API which accesses embedded ‘name’ strings in SFNT-based font formats (i.e., TrueType and OpenType).

-
- -

FT_OPENTYPE_VALIDATE_H

-
-
-#define FT_OPENTYPE_VALIDATE_H  <freetype/ftotval.h>
-
-
- -

A macro used in #include statements to name the file containing the optional FreeType 2 API which validates OpenType tables (‘BASE’, ‘GDEF’, ‘GPOS’, ‘GSUB’, ‘JSTF’).

-
- -

FT_GX_VALIDATE_H

-
-
-#define FT_GX_VALIDATE_H  <freetype/ftgxval.h>
-
-
- -

A macro used in #include statements to name the file containing the optional FreeType 2 API which validates TrueTypeGX/AAT tables (‘feat’, ‘mort’, ‘morx’, ‘bsln’, ‘just’, ‘kern’, ‘opbd’, ‘trak’, ‘prop’).

-
- -

FT_PFR_H

-
-
-#define FT_PFR_H  <freetype/ftpfr.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which accesses PFR-specific data.

-
- -

FT_STROKER_H

-
-
-#define FT_STROKER_H  <freetype/ftstroke.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which provides functions to stroke outline paths.

-
- -

FT_SYNTHESIS_H

-
-
-#define FT_SYNTHESIS_H  <freetype/ftsynth.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which performs artificial obliquing and emboldening.

-
- -

FT_FONT_FORMATS_H

-
-
-#define FT_FONT_FORMATS_H  <freetype/ftfntfmt.h>
-
-  /* deprecated */
-#define FT_XFREE86_H  FT_FONT_FORMATS_H
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which provides functions specific to font formats.

-
- -

FT_TRIGONOMETRY_H

-
-
-#define FT_TRIGONOMETRY_H  <freetype/fttrigon.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which performs trigonometric computations (e.g., cosines and arc tangents).

-
- -

FT_LCD_FILTER_H

-
-
-#define FT_LCD_FILTER_H  <freetype/ftlcdfil.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which performs color filtering for subpixel rendering.

-
- -

FT_INCREMENTAL_H

-
-
-#define FT_INCREMENTAL_H  <freetype/ftincrem.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which performs incremental glyph loading.

-
- -

FT_GASP_H

-
-
-#define FT_GASP_H  <freetype/ftgasp.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which returns entries from the TrueType GASP table.

-
- -

FT_ADVANCES_H

-
-
-#define FT_ADVANCES_H  <freetype/ftadvanc.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which returns individual and ranged glyph advances.

-
- -

FT_COLOR_H

-
-
-#define FT_COLOR_H  <freetype/ftcolor.h>
-
-
- -

A macro used in #include statements to name the file containing the FreeType 2 API which handles the OpenType ‘CPAL’ table.

-
- - - - - - - - - -
-
-
-
- - - - -
- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-header_inclusion.html b/ThirdParty/freetype/docs/reference/site/ft2-header_inclusion.html deleted file mode 100644 index 3650c35..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-header_inclusion.html +++ /dev/null @@ -1,1159 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FreeType's header inclusion scheme - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » General Remarks » FreeType's header inclusion scheme

-
-

FreeType's header inclusion scheme

-

Synopsis

-

To be as flexible as possible (and for historical reasons), FreeType uses a very special inclusion scheme to load header files, for example -

  #include <ft2build.h>
-
-  #include FT_FREETYPE_H
-  #include FT_OUTLINE_H
-

-

A compiler and its preprocessor only needs an include path to find the file ft2build.h; the exact locations and names of the other FreeType header files are hidden by ‘Header File Macros’, loaded by ft2build.h. The API documentation always gives the header macro name needed for a particular function.

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FreeType » Docs » Miscellaneous » Incremental Loading

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Incremental Loading

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Synopsis

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This section contains various functions used to perform so-called ‘incremental’ glyph loading. This is a mode where all glyphs loaded from a given FT_Face are provided by the client application.

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Apart from that, all other tables are loaded normally from the font file. This mode is useful when FreeType is used within another engine, e.g., a PostScript Imaging Processor.

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To enable this mode, you must use FT_Open_Face, passing an FT_Parameter with the FT_PARAM_TAG_INCREMENTAL tag and an FT_Incremental_Interface value. See the comments for FT_Incremental_InterfaceRec for an example.

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FT_Incremental

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-
-  typedef struct FT_IncrementalRec_*  FT_Incremental;
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-
- -

An opaque type describing a user-provided object used to implement ‘incremental’ glyph loading within FreeType. This is used to support embedded fonts in certain environments (e.g., PostScript interpreters), where the glyph data isn't in the font file, or must be overridden by different values.

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note

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It is up to client applications to create and implement FT_Incremental objects, as long as they provide implementations for the methods FT_Incremental_GetGlyphDataFunc, FT_Incremental_FreeGlyphDataFunc and FT_Incremental_GetGlyphMetricsFunc.

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See the description of FT_Incremental_InterfaceRec to understand how to use incremental objects with FreeType.

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FT_Incremental_MetricsRec

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-  typedef struct  FT_Incremental_MetricsRec_
-  {
-    FT_Long  bearing_x;
-    FT_Long  bearing_y;
-    FT_Long  advance;
-    FT_Long  advance_v;     /* since 2.3.12 */
-
-  } FT_Incremental_MetricsRec;
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- -

A small structure used to contain the basic glyph metrics returned by the FT_Incremental_GetGlyphMetricsFunc method.

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fields

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bearing_x -

Left bearing, in font units.

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bearing_y -

Top bearing, in font units.

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advance -

Horizontal component of glyph advance, in font units.

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advance_v -

Vertical component of glyph advance, in font units.

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note

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These correspond to horizontal or vertical metrics depending on the value of the vertical argument to the function FT_Incremental_GetGlyphMetricsFunc.

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FT_Incremental_Metrics

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-   typedef struct FT_Incremental_MetricsRec_*  FT_Incremental_Metrics;
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A handle to an FT_Incremental_MetricsRec structure.

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FT_Incremental_GetGlyphDataFunc

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-  typedef FT_Error
-  (*FT_Incremental_GetGlyphDataFunc)( FT_Incremental  incremental,
-                                      FT_UInt         glyph_index,
-                                      FT_Data*        adata );
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- -

A function called by FreeType to access a given glyph's data bytes during FT_Load_Glyph or FT_Load_Char if incremental loading is enabled.

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Note that the format of the glyph's data bytes depends on the font file format. For TrueType, it must correspond to the raw bytes within the ‘glyf’ table. For PostScript formats, it must correspond to the unencrypted charstring bytes, without any lenIV header. It is undefined for any other format.

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input

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incremental -

Handle to an opaque FT_Incremental handle provided by the client application.

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glyph_index -

Index of relevant glyph.

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output

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adata -

A structure describing the returned glyph data bytes (which will be accessed as a read-only byte block).

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return

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FreeType error code. 0 means success.

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note

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If this function returns successfully the method FT_Incremental_FreeGlyphDataFunc will be called later to release the data bytes.

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Nested calls to FT_Incremental_GetGlyphDataFunc can happen for compound glyphs.

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FT_Incremental_FreeGlyphDataFunc

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-
-  typedef void
-  (*FT_Incremental_FreeGlyphDataFunc)( FT_Incremental  incremental,
-                                       FT_Data*        data );
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- -

A function used to release the glyph data bytes returned by a successful call to FT_Incremental_GetGlyphDataFunc.

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input

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incremental -

A handle to an opaque FT_Incremental handle provided by the client application.

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data -

A structure describing the glyph data bytes (which will be accessed as a read-only byte block).

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FT_Incremental_GetGlyphMetricsFunc

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-  typedef FT_Error
-  (*FT_Incremental_GetGlyphMetricsFunc)
-                      ( FT_Incremental              incremental,
-                        FT_UInt                     glyph_index,
-                        FT_Bool                     vertical,
-                        FT_Incremental_MetricsRec  *ametrics );
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- -

A function used to retrieve the basic metrics of a given glyph index before accessing its data. This is necessary because, in certain formats like TrueType, the metrics are stored in a different place from the glyph images proper.

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input

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incremental -

A handle to an opaque FT_Incremental handle provided by the client application.

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glyph_index -

Index of relevant glyph.

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vertical -

If true, return vertical metrics.

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ametrics -

This parameter is used for both input and output. The original glyph metrics, if any, in font units. If metrics are not available all the values must be set to zero.

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output

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ametrics -

The replacement glyph metrics in font units.

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FT_Incremental_FuncsRec

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-
-  typedef struct  FT_Incremental_FuncsRec_
-  {
-    FT_Incremental_GetGlyphDataFunc     get_glyph_data;
-    FT_Incremental_FreeGlyphDataFunc    free_glyph_data;
-    FT_Incremental_GetGlyphMetricsFunc  get_glyph_metrics;
-
-  } FT_Incremental_FuncsRec;
-
-
- -

A table of functions for accessing fonts that load data incrementally. Used in FT_Incremental_InterfaceRec.

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fields

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get_glyph_data -

The function to get glyph data. Must not be null.

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free_glyph_data -

The function to release glyph data. Must not be null.

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get_glyph_metrics -

The function to get glyph metrics. May be null if the font does not provide overriding glyph metrics.

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- -

FT_Incremental_InterfaceRec

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-  typedef struct  FT_Incremental_InterfaceRec_
-  {
-    const FT_Incremental_FuncsRec*  funcs;
-    FT_Incremental                  object;
-
-  } FT_Incremental_InterfaceRec;
-
-
- -

A structure to be used with FT_Open_Face to indicate that the user wants to support incremental glyph loading. You should use it with FT_PARAM_TAG_INCREMENTAL as in the following example: -

  FT_Incremental_InterfaceRec  inc_int;
-  FT_Parameter                 parameter;
-  FT_Open_Args                 open_args;
-
-
-  // set up incremental descriptor
-  inc_int.funcs  = my_funcs;
-  inc_int.object = my_object;
-
-  // set up optional parameter
-  parameter.tag  = FT_PARAM_TAG_INCREMENTAL;
-  parameter.data = &inc_int;
-
-  // set up FT_Open_Args structure
-  open_args.flags      = FT_OPEN_PATHNAME | FT_OPEN_PARAMS;
-  open_args.pathname   = my_font_pathname;
-  open_args.num_params = 1;
-  open_args.params     = &parameter; // we use one optional argument
-
-  // open the font
-  error = FT_Open_Face( library, &open_args, index, &face );
-  ...
-

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- -

FT_Incremental_Interface

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Defined in FT_INCREMENTAL_H (freetype/ftincrem.h).

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-  typedef FT_Incremental_InterfaceRec*   FT_Incremental_Interface;
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A pointer to an FT_Incremental_InterfaceRec structure.

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FreeType » Docs » Global Index

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FreeType-2.10.0 API Reference

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B

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BDF_Property
-BDF_PROPERTY_TYPE_ATOM
-BDF_PROPERTY_TYPE_CARDINAL
-BDF_PROPERTY_TYPE_INTEGER
-BDF_PROPERTY_TYPE_NONE
-BDF_PropertyRec
-BDF_PropertyType

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C

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CID_FaceDict
-CID_FaceDictRec
-CID_FaceInfo
-CID_FaceInfoRec
-CID_FontDict
-CID_Info

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D

-

darkening-parameters
-default-script

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F

-

fallback-script
-FREETYPE_MAJOR
-FREETYPE_MINOR
-FREETYPE_PATCH
-FREETYPE_XXX
-FT_Activate_Size
-FT_Add_Default_Modules
-FT_Add_Module
-FT_ADVANCE_FLAG_FAST_ONLY
-FT_ADVANCES_H
-FT_Alloc_Func
-FT_Angle
-FT_ANGLE_2PI
-FT_Angle_Diff
-FT_ANGLE_PI
-FT_ANGLE_PI2
-FT_ANGLE_PI4
-FT_Atan2
-FT_Attach_File
-FT_Attach_Stream
-FT_AUTOHINTER_H
-FT_AUTOHINTER_SCRIPT_CJK
-FT_AUTOHINTER_SCRIPT_INDIC
-FT_AUTOHINTER_SCRIPT_LATIN
-FT_AUTOHINTER_SCRIPT_NONE
-FT_AUTOHINTER_SCRIPT_XXX
-FT_BBox
-FT_BBOX_H
-FT_BDF_H
-FT_Bitmap
-FT_Bitmap_Blend
-FT_Bitmap_Convert
-FT_Bitmap_Copy
-FT_Bitmap_Done
-FT_Bitmap_Embolden
-FT_BITMAP_H
-FT_Bitmap_Init
-FT_Bitmap_Size
-FT_BitmapGlyph
-FT_BitmapGlyphRec
-FT_Bool
-FT_Byte
-FT_Bytes
-FT_BZIP2_H
-FT_CACHE_H
-FT_CeilFix
-FT_CFF_DRIVER_H
-FT_Char
-FT_CharMap
-FT_CharMapRec
-FT_CID_H
-FT_ClassicKern_Free
-FT_ClassicKern_Validate
-FT_Color
-FT_COLOR_H
-FT_CONFIG_CONFIG_H
-FT_CONFIG_MODULES_H
-FT_CONFIG_OPTIONS_H
-FT_CONFIG_STANDARD_LIBRARY_H
-FT_Cos
-FT_Data
-FT_DEBUG_HOOK_TRUETYPE
-FT_DEBUG_HOOK_XXX
-FT_DebugHook_Func
-FT_DivFix
-FT_Done_Face
-FT_Done_FreeType
-FT_Done_Glyph
-FT_Done_Library
-FT_Done_MM_Var
-FT_Done_Size
-FT_Driver
-FT_DRIVER_H
-FT_ENC_TAG
-FT_Encoding
-FT_ENCODING_ADOBE_CUSTOM
-FT_ENCODING_ADOBE_EXPERT
-FT_ENCODING_ADOBE_LATIN_1
-FT_ENCODING_ADOBE_STANDARD
-FT_ENCODING_APPLE_ROMAN
-FT_ENCODING_BIG5
-FT_ENCODING_JOHAB
-FT_ENCODING_MS_BIG5
-FT_ENCODING_MS_GB2312
-FT_ENCODING_MS_JOHAB
-FT_ENCODING_MS_SJIS
-FT_ENCODING_MS_SYMBOL
-FT_ENCODING_MS_WANSUNG
-FT_ENCODING_NONE
-FT_ENCODING_OLD_LATIN_2
-FT_ENCODING_PRC
-FT_ENCODING_SJIS
-FT_ENCODING_UNICODE
-FT_ENCODING_WANSUNG
-FT_Err_XXX
-FT_Error
-FT_Error_String
-FT_ERRORS_H
-FT_F26Dot6
-FT_F2Dot14
-FT_Face
-FT_Face_CheckTrueTypePatents
-FT_FACE_FLAG_CID_KEYED
-FT_FACE_FLAG_COLOR
-FT_FACE_FLAG_EXTERNAL_STREAM
-FT_FACE_FLAG_FAST_GLYPHS
-FT_FACE_FLAG_FIXED_SIZES
-FT_FACE_FLAG_FIXED_WIDTH
-FT_FACE_FLAG_GLYPH_NAMES
-FT_FACE_FLAG_HINTER
-FT_FACE_FLAG_HORIZONTAL
-FT_FACE_FLAG_KERNING
-FT_FACE_FLAG_MULTIPLE_MASTERS
-FT_FACE_FLAG_SCALABLE
-FT_FACE_FLAG_SFNT
-FT_FACE_FLAG_TRICKY
-FT_FACE_FLAG_VARIATION
-FT_FACE_FLAG_VERTICAL
-FT_FACE_FLAG_XXX
-FT_Face_GetCharsOfVariant
-FT_Face_GetCharVariantIndex
-FT_Face_GetCharVariantIsDefault
-FT_Face_GetVariantSelectors
-FT_Face_GetVariantsOfChar
-FT_Face_Internal
-FT_Face_Properties
-FT_Face_SetUnpatentedHinting
-FT_FaceRec
-FT_Fixed
-FT_FloorFix
-FT_FONT_FORMATS_H
-FT_Free_Func
-FT_FREETYPE_H
-FT_FSTYPE_BITMAP_EMBEDDING_ONLY
-FT_FSTYPE_EDITABLE_EMBEDDING
-FT_FSTYPE_INSTALLABLE_EMBEDDING
-FT_FSTYPE_NO_SUBSETTING
-FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING
-FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING
-FT_FSTYPE_XXX
-FT_FWord
-FT_GASP_DO_GRAY
-FT_GASP_DO_GRIDFIT
-FT_GASP_H
-FT_GASP_NO_TABLE
-FT_GASP_SYMMETRIC_GRIDFIT
-FT_GASP_SYMMETRIC_SMOOTHING
-FT_GASP_XXX
-FT_Generic
-FT_Generic_Finalizer
-FT_Get_Advance
-FT_Get_Advances
-FT_Get_BDF_Charset_ID
-FT_Get_BDF_Property
-FT_Get_Char_Index
-FT_Get_Charmap_Index
-FT_Get_CID_From_Glyph_Index
-FT_Get_CID_Is_Internally_CID_Keyed
-FT_Get_CID_Registry_Ordering_Supplement
-FT_Get_CMap_Format
-FT_Get_CMap_Language_ID
-FT_Get_Color_Glyph_Layer
-FT_Get_First_Char
-FT_Get_Font_Format
-FT_Get_FSType_Flags
-FT_Get_Gasp
-FT_Get_Glyph
-FT_Get_Glyph_Name
-FT_Get_Kerning
-FT_Get_MM_Blend_Coordinates
-FT_Get_MM_Var
-FT_Get_MM_WeightVector
-FT_Get_Module
-FT_Get_Multi_Master
-FT_Get_Name_Index
-FT_Get_Next_Char
-FT_Get_PFR_Advance
-FT_Get_PFR_Kerning
-FT_Get_PFR_Metrics
-FT_Get_Postscript_Name
-FT_Get_PS_Font_Info
-FT_Get_PS_Font_Private
-FT_Get_PS_Font_Value
-FT_Get_Renderer
-FT_Get_Sfnt_LangTag
-FT_Get_Sfnt_Name
-FT_Get_Sfnt_Name_Count
-FT_Get_Sfnt_Table
-FT_Get_SubGlyph_Info
-FT_Get_Track_Kerning
-FT_Get_TrueType_Engine_Type
-FT_Get_Var_Axis_Flags
-FT_Get_Var_Blend_Coordinates
-FT_Get_Var_Design_Coordinates
-FT_Get_WinFNT_Header
-FT_GetFile_From_Mac_ATS_Name
-FT_GetFile_From_Mac_Name
-FT_GetFilePath_From_Mac_ATS_Name
-FT_Glyph
-FT_GLYPH_BBOX_GRIDFIT
-FT_Glyph_BBox_Mode
-FT_GLYPH_BBOX_PIXELS
-FT_GLYPH_BBOX_SUBPIXELS
-FT_GLYPH_BBOX_TRUNCATE
-FT_GLYPH_BBOX_UNSCALED
-FT_Glyph_Copy
-FT_Glyph_Format
-FT_GLYPH_FORMAT_BITMAP
-FT_GLYPH_FORMAT_COMPOSITE
-FT_GLYPH_FORMAT_NONE
-FT_GLYPH_FORMAT_OUTLINE
-FT_GLYPH_FORMAT_PLOTTER
-FT_Glyph_Get_CBox
-FT_GLYPH_H
-FT_Glyph_Metrics
-FT_Glyph_Stroke
-FT_Glyph_StrokeBorder
-FT_Glyph_To_Bitmap
-FT_Glyph_Transform
-FT_GlyphRec
-FT_GlyphSlot
-FT_GlyphSlot_Own_Bitmap
-FT_GlyphSlotRec
-FT_GX_VALIDATE_H
-FT_GZIP_H
-FT_Gzip_Uncompress
-FT_HAS_COLOR
-FT_HAS_FAST_GLYPHS
-FT_HAS_FIXED_SIZES
-FT_HAS_GLYPH_NAMES
-FT_HAS_HORIZONTAL
-FT_HAS_KERNING
-FT_HAS_MULTIPLE_MASTERS
-FT_Has_PS_Glyph_Names
-FT_HAS_VERTICAL
-FT_HINTING_ADOBE
-FT_HINTING_FREETYPE
-FT_HINTING_XXX
-FT_IMAGE_H
-FT_IMAGE_TAG
-FT_Incremental
-FT_Incremental_FreeGlyphDataFunc
-FT_Incremental_FuncsRec
-FT_Incremental_GetGlyphDataFunc
-FT_Incremental_GetGlyphMetricsFunc
-FT_INCREMENTAL_H
-FT_Incremental_Interface
-FT_Incremental_InterfaceRec
-FT_Incremental_Metrics
-FT_Incremental_MetricsRec
-FT_Init_FreeType
-FT_Int
-FT_Int16
-FT_Int32
-FT_Int64
-FT_IS_CID_KEYED
-FT_IS_FIXED_WIDTH
-FT_IS_NAMED_INSTANCE
-FT_IS_SCALABLE
-FT_IS_SFNT
-FT_IS_TRICKY
-FT_IS_VARIATION
-FT_KERNING_DEFAULT
-FT_Kerning_Mode
-FT_KERNING_UNFITTED
-FT_KERNING_UNSCALED
-FT_LayerIterator
-FT_LCD_FILTER_DEFAULT
-FT_LCD_FILTER_H
-FT_LCD_FILTER_LEGACY
-FT_LCD_FILTER_LEGACY1
-FT_LCD_FILTER_LIGHT
-FT_LCD_FILTER_NONE
-FT_LcdFilter
-FT_LcdFiveTapFilter
-FT_Library
-FT_Library_SetLcdFilter
-FT_Library_SetLcdFilterWeights
-FT_Library_SetLcdGeometry
-FT_Library_Version
-FT_List
-FT_List_Add
-FT_List_Destructor
-FT_List_Finalize
-FT_List_Find
-FT_LIST_H
-FT_List_Insert
-FT_List_Iterate
-FT_List_Iterator
-FT_List_Remove
-FT_List_Up
-FT_ListNode
-FT_ListNodeRec
-FT_ListRec
-FT_LOAD_BITMAP_METRICS_ONLY
-FT_Load_Char
-FT_LOAD_COLOR
-FT_LOAD_COMPUTE_METRICS
-FT_LOAD_CROP_BITMAP
-FT_LOAD_DEFAULT
-FT_LOAD_FORCE_AUTOHINT
-FT_Load_Glyph
-FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH
-FT_LOAD_IGNORE_TRANSFORM
-FT_LOAD_LINEAR_DESIGN
-FT_LOAD_MONOCHROME
-FT_LOAD_NO_AUTOHINT
-FT_LOAD_NO_BITMAP
-FT_LOAD_NO_HINTING
-FT_LOAD_NO_RECURSE
-FT_LOAD_NO_SCALE
-FT_LOAD_PEDANTIC
-FT_LOAD_RENDER
-FT_Load_Sfnt_Table
-FT_LOAD_TARGET_LCD
-FT_LOAD_TARGET_LCD_V
-FT_LOAD_TARGET_LIGHT
-FT_LOAD_TARGET_MODE
-FT_LOAD_TARGET_MONO
-FT_LOAD_TARGET_NORMAL
-FT_LOAD_TARGET_XXX
-FT_LOAD_VERTICAL_LAYOUT
-FT_LOAD_XXX
-FT_Long
-FT_LZW_H
-FT_MAC_H
-FT_MAKE_TAG
-FT_Matrix
-FT_Matrix_Invert
-FT_Matrix_Multiply
-FT_Memory
-FT_MemoryRec
-FT_MM_Axis
-FT_MM_Var
-FT_Module
-FT_Module_Class
-FT_Module_Constructor
-FT_Module_Destructor
-FT_MODULE_ERRORS_H
-FT_MODULE_H
-FT_Module_Requester
-FT_MulDiv
-FT_MulFix
-FT_Multi_Master
-FT_MULTIPLE_MASTERS_H
-FT_New_Face
-FT_New_Face_From_FOND
-FT_New_Face_From_FSRef
-FT_New_Face_From_FSSpec
-FT_New_Glyph
-FT_New_Library
-FT_New_Memory_Face
-FT_New_Size
-FT_Offset
-FT_Open_Args
-FT_OPEN_DRIVER
-FT_Open_Face
-FT_OPEN_MEMORY
-FT_OPEN_PARAMS
-FT_OPEN_PATHNAME
-FT_OPEN_STREAM
-FT_OPEN_XXX
-FT_OpenType_Free
-FT_OpenType_Validate
-FT_OPENTYPE_VALIDATE_H
-FT_Orientation
-FT_ORIENTATION_FILL_LEFT
-FT_ORIENTATION_FILL_RIGHT
-FT_ORIENTATION_NONE
-FT_ORIENTATION_POSTSCRIPT
-FT_ORIENTATION_TRUETYPE
-FT_Outline
-FT_Outline_Check
-FT_Outline_ConicToFunc
-FT_Outline_Copy
-FT_Outline_CubicToFunc
-FT_Outline_Decompose
-FT_Outline_Done
-FT_Outline_Embolden
-FT_Outline_EmboldenXY
-FT_OUTLINE_EVEN_ODD_FILL
-FT_Outline_Funcs
-FT_Outline_Get_BBox
-FT_Outline_Get_Bitmap
-FT_Outline_Get_CBox
-FT_Outline_Get_Orientation
-FT_Outline_GetInsideBorder
-FT_Outline_GetOutsideBorder
-FT_OUTLINE_H
-FT_OUTLINE_HIGH_PRECISION
-FT_OUTLINE_IGNORE_DROPOUTS
-FT_OUTLINE_INCLUDE_STUBS
-FT_Outline_LineToFunc
-FT_Outline_MoveToFunc
-FT_Outline_New
-FT_OUTLINE_NONE
-FT_OUTLINE_OWNER
-FT_Outline_Render
-FT_Outline_Reverse
-FT_OUTLINE_REVERSE_FILL
-FT_OUTLINE_SINGLE_PASS
-FT_OUTLINE_SMART_DROPOUTS
-FT_Outline_Transform
-FT_Outline_Translate
-FT_OUTLINE_XXX
-FT_OutlineGlyph
-FT_OutlineGlyphRec
-FT_Palette_Data
-FT_Palette_Data_Get
-FT_PALETTE_FOR_DARK_BACKGROUND
-FT_PALETTE_FOR_LIGHT_BACKGROUND
-FT_Palette_Select
-FT_Palette_Set_Foreground_Color
-FT_PALETTE_XXX
-FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY
-FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY
-FT_PARAM_TAG_INCREMENTAL
-FT_PARAM_TAG_LCD_FILTER_WEIGHTS
-FT_PARAM_TAG_RANDOM_SEED
-FT_PARAM_TAG_STEM_DARKENING
-FT_PARAM_TAG_UNPATENTED_HINTING
-FT_Parameter
-FT_PCF_DRIVER_H
-FT_PFR_H
-FT_Pixel_Mode
-FT_PIXEL_MODE_BGRA
-FT_PIXEL_MODE_GRAY
-FT_PIXEL_MODE_GRAY2
-FT_PIXEL_MODE_GRAY4
-FT_PIXEL_MODE_LCD
-FT_PIXEL_MODE_LCD_V
-FT_PIXEL_MODE_MONO
-FT_PIXEL_MODE_NONE
-FT_Pointer
-FT_Pos
-FT_Prop_GlyphToScriptMap
-FT_Prop_IncreaseXHeight
-FT_Property_Get
-FT_Property_Set
-FT_PtrDist
-FT_Raster
-FT_Raster_BitSet_Func
-FT_Raster_BitTest_Func
-FT_Raster_DoneFunc
-FT_RASTER_FLAG_AA
-FT_RASTER_FLAG_CLIP
-FT_RASTER_FLAG_DEFAULT
-FT_RASTER_FLAG_DIRECT
-FT_RASTER_FLAG_XXX
-FT_Raster_Funcs
-FT_Raster_NewFunc
-FT_Raster_Params
-FT_Raster_RenderFunc
-FT_Raster_ResetFunc
-FT_Raster_SetModeFunc
-FT_Realloc_Func
-FT_Reference_Face
-FT_Reference_Library
-FT_Remove_Module
-FT_Render_Glyph
-FT_RENDER_H
-FT_Render_Mode
-FT_RENDER_MODE_LCD
-FT_RENDER_MODE_LCD_V
-FT_RENDER_MODE_LIGHT
-FT_RENDER_MODE_MONO
-FT_RENDER_MODE_NORMAL
-FT_Renderer
-FT_Renderer_Class
-FT_Request_Size
-FT_RoundFix
-FT_Select_Charmap
-FT_Select_Size
-FT_Set_Char_Size
-FT_Set_Charmap
-FT_Set_Debug_Hook
-FT_Set_Default_Properties
-FT_Set_MM_Blend_Coordinates
-FT_Set_MM_Design_Coordinates
-FT_Set_MM_WeightVector
-FT_Set_Named_Instance
-FT_Set_Pixel_Sizes
-FT_Set_Renderer
-FT_Set_Transform
-FT_Set_Var_Blend_Coordinates
-FT_Set_Var_Design_Coordinates
-FT_SFNT_HEAD
-FT_SFNT_HHEA
-FT_SFNT_MAXP
-FT_SFNT_NAMES_H
-FT_SFNT_OS2
-FT_SFNT_PCLT
-FT_SFNT_POST
-FT_Sfnt_Table_Info
-FT_Sfnt_Tag
-FT_SFNT_VHEA
-FT_SfntLangTag
-FT_SfntName
-FT_Short
-FT_Sin
-FT_Size
-FT_Size_Internal
-FT_Size_Metrics
-FT_Size_Request
-FT_Size_Request_Type
-FT_SIZE_REQUEST_TYPE_BBOX
-FT_SIZE_REQUEST_TYPE_CELL
-FT_SIZE_REQUEST_TYPE_NOMINAL
-FT_SIZE_REQUEST_TYPE_REAL_DIM
-FT_SIZE_REQUEST_TYPE_SCALES
-FT_Size_RequestRec
-FT_SizeRec
-FT_SIZES_H
-FT_Slot_Internal
-FT_Span
-FT_SpanFunc
-FT_Stream
-FT_Stream_CloseFunc
-FT_Stream_IoFunc
-FT_Stream_OpenBzip2
-FT_Stream_OpenGzip
-FT_Stream_OpenLZW
-FT_StreamDesc
-FT_StreamRec
-FT_String
-FT_Stroker
-FT_Stroker_BeginSubPath
-FT_STROKER_BORDER_LEFT
-FT_STROKER_BORDER_RIGHT
-FT_Stroker_ConicTo
-FT_Stroker_CubicTo
-FT_Stroker_Done
-FT_Stroker_EndSubPath
-FT_Stroker_Export
-FT_Stroker_ExportBorder
-FT_Stroker_GetBorderCounts
-FT_Stroker_GetCounts
-FT_STROKER_H
-FT_Stroker_LineCap
-FT_STROKER_LINECAP_BUTT
-FT_STROKER_LINECAP_ROUND
-FT_STROKER_LINECAP_SQUARE
-FT_Stroker_LineJoin
-FT_STROKER_LINEJOIN_BEVEL
-FT_STROKER_LINEJOIN_MITER
-FT_STROKER_LINEJOIN_MITER_FIXED
-FT_STROKER_LINEJOIN_MITER_VARIABLE
-FT_STROKER_LINEJOIN_ROUND
-FT_Stroker_LineTo
-FT_Stroker_New
-FT_Stroker_ParseOutline
-FT_Stroker_Rewind
-FT_Stroker_Set
-FT_StrokerBorder
-FT_STYLE_FLAG_BOLD
-FT_STYLE_FLAG_ITALIC
-FT_STYLE_FLAG_XXX
-FT_SubGlyph
-FT_SUBGLYPH_FLAG_2X2
-FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS
-FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES
-FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID
-FT_SUBGLYPH_FLAG_SCALE
-FT_SUBGLYPH_FLAG_USE_MY_METRICS
-FT_SUBGLYPH_FLAG_XXX
-FT_SUBGLYPH_FLAG_XY_SCALE
-FT_SYNTHESIS_H
-FT_SYSTEM_H
-FT_Tag
-FT_Tan
-FT_TRIGONOMETRY_H
-FT_TRUETYPE_DRIVER_H
-FT_TRUETYPE_ENGINE_TYPE_NONE
-FT_TRUETYPE_ENGINE_TYPE_PATENTED
-FT_TRUETYPE_ENGINE_TYPE_UNPATENTED
-FT_TRUETYPE_IDS_H
-FT_TRUETYPE_TABLES_H
-FT_TRUETYPE_TAGS_H
-FT_TrueTypeEngineType
-FT_TrueTypeGX_Free
-FT_TrueTypeGX_Validate
-FT_TYPE1_TABLES_H
-FT_TYPES_H
-FT_UFWord
-FT_UInt
-FT_UInt16
-FT_UInt32
-FT_UInt64
-FT_ULong
-FT_UnitVector
-FT_UShort
-FT_VALIDATE_APPLE
-FT_VALIDATE_BASE
-FT_VALIDATE_bsln
-FT_VALIDATE_CKERN
-FT_VALIDATE_CKERNXXX
-FT_VALIDATE_feat
-FT_VALIDATE_GDEF
-FT_VALIDATE_GPOS
-FT_VALIDATE_GSUB
-FT_VALIDATE_GX
-FT_VALIDATE_GX_LENGTH
-FT_VALIDATE_GXXXX
-FT_VALIDATE_JSTF
-FT_VALIDATE_just
-FT_VALIDATE_kern
-FT_VALIDATE_lcar
-FT_VALIDATE_MATH
-FT_VALIDATE_mort
-FT_VALIDATE_morx
-FT_VALIDATE_MS
-FT_VALIDATE_opbd
-FT_VALIDATE_OT
-FT_VALIDATE_OTXXX
-FT_VALIDATE_prop
-FT_VALIDATE_trak
-FT_Var_Axis
-FT_VAR_AXIS_FLAG_HIDDEN
-FT_VAR_AXIS_FLAG_XXX
-FT_Var_Named_Style
-FT_Vector
-FT_Vector_From_Polar
-FT_Vector_Length
-FT_Vector_Polarize
-FT_Vector_Rotate
-FT_Vector_Transform
-FT_Vector_Unit
-FT_WinFNT_Header
-FT_WinFNT_HeaderRec
-FT_WinFNT_ID_CP1250
-FT_WinFNT_ID_CP1251
-FT_WinFNT_ID_CP1252
-FT_WinFNT_ID_CP1253
-FT_WinFNT_ID_CP1254
-FT_WinFNT_ID_CP1255
-FT_WinFNT_ID_CP1256
-FT_WinFNT_ID_CP1257
-FT_WinFNT_ID_CP1258
-FT_WinFNT_ID_CP1361
-FT_WinFNT_ID_CP874
-FT_WinFNT_ID_CP932
-FT_WinFNT_ID_CP936
-FT_WinFNT_ID_CP949
-FT_WinFNT_ID_CP950
-FT_WinFNT_ID_DEFAULT
-FT_WinFNT_ID_MAC
-FT_WinFNT_ID_OEM
-FT_WinFNT_ID_SYMBOL
-FT_WinFNT_ID_XXX
-FT_WINFONTS_H
-FTC_CMapCache
-FTC_CMapCache_Lookup
-FTC_CMapCache_New
-FTC_Face_Requester
-FTC_FaceID
-FTC_ImageCache
-FTC_ImageCache_Lookup
-FTC_ImageCache_LookupScaler
-FTC_ImageCache_New
-FTC_ImageType
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-FTC_Manager
-FTC_Manager_Done
-FTC_Manager_LookupFace
-FTC_Manager_LookupSize
-FTC_Manager_New
-FTC_Manager_RemoveFaceID
-FTC_Manager_Reset
-FTC_Node
-FTC_Node_Unref
-FTC_SBit
-FTC_SBitCache
-FTC_SBitCache_Lookup
-FTC_SBitCache_LookupScaler
-FTC_SBitCache_New
-FTC_SBitRec
-FTC_Scaler
-FTC_ScalerRec

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G

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glyph-to-script-map

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H

-

hinting-engine

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I

-

increase-x-height
-interpreter-version

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N

-

no-long-family-names
-no-stem-darkening

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P

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PS_DICT_BLUE_FUZZ
-PS_DICT_BLUE_SCALE
-PS_DICT_BLUE_SHIFT
-PS_DICT_BLUE_VALUE
-PS_DICT_CHAR_STRING
-PS_DICT_CHAR_STRING_KEY
-PS_DICT_ENCODING_ENTRY
-PS_DICT_ENCODING_TYPE
-PS_DICT_FAMILY_BLUE
-PS_DICT_FAMILY_NAME
-PS_DICT_FAMILY_OTHER_BLUE
-PS_DICT_FONT_BBOX
-PS_DICT_FONT_MATRIX
-PS_DICT_FONT_NAME
-PS_DICT_FONT_TYPE
-PS_DICT_FORCE_BOLD
-PS_DICT_FS_TYPE
-PS_DICT_FULL_NAME
-PS_DICT_IS_FIXED_PITCH
-PS_DICT_ITALIC_ANGLE
-PS_Dict_Keys
-PS_DICT_LANGUAGE_GROUP
-PS_DICT_LEN_IV
-PS_DICT_MIN_FEATURE
-PS_DICT_NOTICE
-PS_DICT_NUM_BLUE_VALUES
-PS_DICT_NUM_CHAR_STRINGS
-PS_DICT_NUM_FAMILY_BLUES
-PS_DICT_NUM_FAMILY_OTHER_BLUES
-PS_DICT_NUM_OTHER_BLUES
-PS_DICT_NUM_STEM_SNAP_H
-PS_DICT_NUM_STEM_SNAP_V
-PS_DICT_NUM_SUBRS
-PS_DICT_OTHER_BLUE
-PS_DICT_PAINT_TYPE
-PS_DICT_PASSWORD
-PS_DICT_RND_STEM_UP
-PS_DICT_STD_HW
-PS_DICT_STD_VW
-PS_DICT_STEM_SNAP_H
-PS_DICT_STEM_SNAP_V
-PS_DICT_SUBR
-PS_DICT_UNDERLINE_POSITION
-PS_DICT_UNDERLINE_THICKNESS
-PS_DICT_UNIQUE_ID
-PS_DICT_VERSION
-PS_DICT_WEIGHT
-PS_FontInfo
-PS_FontInfoRec
-PS_Private
-PS_PrivateRec

-

R

-

random-seed

-

T

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T1_BLEND_BLUE_SCALE
-T1_BLEND_BLUE_SHIFT
-T1_BLEND_BLUE_VALUES
-T1_BLEND_FAMILY_BLUES
-T1_BLEND_FAMILY_OTHER_BLUES
-T1_Blend_Flags
-T1_BLEND_FORCE_BOLD
-T1_BLEND_ITALIC_ANGLE
-T1_BLEND_OTHER_BLUES
-T1_BLEND_STANDARD_HEIGHT
-T1_BLEND_STANDARD_WIDTH
-T1_BLEND_STEM_SNAP_HEIGHTS
-T1_BLEND_STEM_SNAP_WIDTHS
-T1_BLEND_UNDERLINE_POSITION
-T1_BLEND_UNDERLINE_THICKNESS
-T1_ENCODING_TYPE_ARRAY
-T1_ENCODING_TYPE_EXPERT
-T1_ENCODING_TYPE_ISOLATIN1
-T1_ENCODING_TYPE_NONE
-T1_ENCODING_TYPE_STANDARD
-T1_EncodingType
-T1_FontInfo
-T1_Private
-TT_ADOBE_ID_CUSTOM
-TT_ADOBE_ID_EXPERT
-TT_ADOBE_ID_LATIN_1
-TT_ADOBE_ID_STANDARD
-TT_ADOBE_ID_XXX
-TT_APPLE_ID_DEFAULT
-TT_APPLE_ID_FULL_UNICODE
-TT_APPLE_ID_ISO_10646
-TT_APPLE_ID_UNICODE_1_1
-TT_APPLE_ID_UNICODE_2_0
-TT_APPLE_ID_UNICODE_32
-TT_APPLE_ID_VARIANT_SELECTOR
-TT_APPLE_ID_XXX
-TT_Header
-TT_HoriHeader
-TT_INTERPRETER_VERSION_35
-TT_INTERPRETER_VERSION_38
-TT_INTERPRETER_VERSION_40
-TT_INTERPRETER_VERSION_XXX
-TT_ISO_ID_10646
-TT_ISO_ID_7BIT_ASCII
-TT_ISO_ID_8859_1
-TT_ISO_ID_XXX
-TT_MAC_ID_XXX
-TT_MAC_LANGID_XXX
-TT_MaxProfile
-TT_MS_ID_BIG_5
-TT_MS_ID_JOHAB
-TT_MS_ID_PRC
-TT_MS_ID_SJIS
-TT_MS_ID_SYMBOL_CS
-TT_MS_ID_UCS_4
-TT_MS_ID_UNICODE_CS
-TT_MS_ID_WANSUNG
-TT_MS_ID_XXX
-TT_MS_LANGID_XXX
-TT_NAME_ID_XXX
-TT_OS2
-TT_PCLT
-TT_PLATFORM_ADOBE
-TT_PLATFORM_APPLE_UNICODE
-TT_PLATFORM_CUSTOM
-TT_PLATFORM_ISO
-TT_PLATFORM_MACINTOSH
-TT_PLATFORM_MICROSOFT
-TT_PLATFORM_XXX
-TT_Postscript
-TT_UCR_XXX
-TT_VertHeader

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W

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warping

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FreeType » Docs » Core API » Glyph Layer Management

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-

Glyph Layer Management

-

Synopsis

-

The functions described here allow access of colored glyph layer data in OpenType's ‘COLR’ tables.

-

FT_LayerIterator

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct  FT_LayerIterator_
-  {
-    FT_UInt   num_layers;
-    FT_UInt   layer;
-    FT_Byte*  p;
-
-  } FT_LayerIterator;
-
-
- -

This iterator object is needed for FT_Get_Color_Glyph_Layer.

-

fields

- - - - - -
num_layers -

The number of glyph layers for the requested glyph index. Will be set by FT_Get_Color_Glyph_Layer.

-
layer -

The current layer. Will be set by FT_Get_Color_Glyph_Layer.

-
p -

An opaque pointer into ‘COLR’ table data. The caller must set this to NULL before the first call of FT_Get_Color_Glyph_Layer.

-
- -
- -

FT_Get_Color_Glyph_Layer

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Bool )
-  FT_Get_Color_Glyph_Layer( FT_Face            face,
-                            FT_UInt            base_glyph,
-                            FT_UInt           *aglyph_index,
-                            FT_UInt           *acolor_index,
-                            FT_LayerIterator*  iterator );
-
-
- -

This is an interface to the ‘COLR’ table in OpenType fonts to iteratively retrieve the colored glyph layers associated with the current glyph slot.

-

https://docs.microsoft.com/en-us/typography/opentype/spec/colr

-

The glyph layer data for a given glyph index, if present, provides an alternative, multi-colour glyph representation: Instead of rendering the outline or bitmap with the given glyph index, glyphs with the indices and colors returned by this function are rendered layer by layer.

-

The returned elements are ordered in the z direction from bottom to top; the 'n'th element should be rendered with the associated palette color and blended on top of the already rendered layers (elements 0, 1, ..., n-1).

-

input

- - - - -
face -

A handle to the parent face object.

-
base_glyph -

The glyph index the colored glyph layers are associated with.

-
- -

inout

- - - -
iterator -

An FT_LayerIterator object. For the first call you should set iterator->p to NULL. For all following calls, simply use the same object again.

-
- -

output

- - - - -
aglyph_index -

The glyph index of the current layer.

-
acolor_index -

The color index into the font face's color palette of the current layer. The value 0xFFFF is special; it doesn't reference a palette entry but indicates that the text foreground color should be used instead (to be set up by the application outside of FreeType).

-

The color palette can be retrieved with FT_Palette_Select.

-
- -

return

- -

Value 1 if everything is OK. If there are no more layers (or if there are no layers at all), value 0 gets returned. In case of an error, value 0 is returned also.

-

note

- -

This function is necessary if you want to handle glyph layers by yourself. In particular, functions that operate with FT_GlyphRec objects (like FT_Get_Glyph or FT_Glyph_To_Bitmap) don't have access to this information.

-

Note that FT_Render_Glyph is able to handle colored glyph layers automatically if the FT_LOAD_COLOR flag is passed to a previous call to FT_Load_Glyph. [This is an experimental feature.]

-

example

- -
  FT_Color*         palette;
-  FT_LayerIterator  iterator;
-
-  FT_Bool  have_layers;
-  FT_UInt  layer_glyph_index;
-  FT_UInt  layer_color_index;
-
-
-  error = FT_Palette_Select( face, palette_index, &palette );
-  if ( error )
-    palette = NULL;
-
-  iterator.p  = NULL;
-  have_layers = FT_Get_Color_Glyph_Layer( face,
-                                          glyph_index,
-                                          &layer_glyph_index,
-                                          &layer_color_index,
-                                          &iterator );
-
-  if ( palette && have_layers )
-  {
-    do
-    {
-      FT_Color  layer_color;
-
-
-      if ( layer_color_index == 0xFFFF )
-        layer_color = text_foreground_color;
-      else
-        layer_color = palette[layer_color_index];
-
-      // Load and render glyph `layer_glyph_index', then
-      // blend resulting pixmap (using color `layer_color')
-      // with previously created pixmaps.
-
-    } while ( FT_Get_Color_Glyph_Layer( face,
-                                        glyph_index,
-                                        &layer_glyph_index,
-                                        &layer_color_index,
-                                        &iterator ) );
-  }
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FreeType » Docs » Controlling FreeType Modules » Subpixel Rendering

-
-

Subpixel Rendering

-

Synopsis

-

FreeType provides two alternative subpixel rendering technologies. Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your ftoption.h file, this enables patented ClearType-style rendering. Otherwise, Harmony LCD rendering is enabled. These technologies are controlled differently and API described below, although always available, performs its function when appropriate method is enabled and does nothing otherwise.

-

ClearType-style LCD rendering exploits the color-striped structure of LCD pixels, increasing the available resolution in the direction of the stripe (usually horizontal RGB) by a factor of 3. Using the subpixels coverages unfiltered can create severe color fringes especially when rendering thin features. Indeed, to produce black-on-white text, the nearby color subpixels must be dimmed equally.

-

A good 5-tap FIR filter should be applied to subpixel coverages regardless of pixel boundaries and should have these properties:

-
    -
  1. -

    It should be symmetrical, like { a, b, c, b, a }, to avoid any shifts in appearance.

    -
    2. -
  2. -

    It should be color-balanced, meaning a + b = c, to reduce color fringes by distributing the computed coverage for one subpixel to all subpixels equally.

    -
    3. -
  3. -

    It should be normalized, meaning 2a + 2b + c = 1.0 to maintain overall brightness.

    -
    4. -
-

Boxy 3-tap filter {0, ⅓, ⅓, ⅓, 0} is sharper but is less forgiving of non-ideal gamma curves of a screen (and viewing angles), beveled filters are fuzzier but more tolerant.

-

Use the FT_Library_SetLcdFilter or FT_Library_SetLcdFilterWeights API to specify a low-pass filter, which is then applied to subpixel-rendered bitmaps generated through FT_Render_Glyph.

-

Harmony LCD rendering is suitable to panels with any regular subpixel structure, not just monitors with 3 color striped subpixels, as long as the color subpixels have fixed positions relative to the pixel center. In this case, each color channel is then rendered separately after shifting the outline opposite to the subpixel shift so that the coverage maps are aligned. This method is immune to color fringes because the shifts do not change integral coverage.

-

The subpixel geometry must be specified by xy-coordinates for each subpixel. By convention they may come in the RGB order: {{-⅓, 0}, {0, 0}, {⅓, 0}} for standard RGB striped panel or {{-⅙, ¼}, {-⅙, -¼}, {⅓, 0}} for a certain PenTile panel.

-

Use the FT_Library_SetLcdGeometry API to specify subpixel positions. If one follows the RGB order convention, the same order applies to the resulting FT_PIXEL_MODE_LCD and FT_PIXEL_MODE_LCD_V bitmaps. Note, however, that the coordinate frame for the latter must be rotated clockwise. Harmony with default LCD geometry is equivalent to ClearType with light filter.

-

As a result of ClearType filtering or Harmony rendering, the dimensions of LCD bitmaps can be either wider or taller than the dimensions of the corresponding outline with regard to the pixel grid. For example, for FT_RENDER_MODE_LCD, the filter adds 2 subpixels to the left, and 2 subpixels to the right. The bitmap offset values are adjusted accordingly, so clients shouldn't need to modify their layout and glyph positioning code when enabling the filter.

-

The ClearType and Harmony rendering is applicable to glyph bitmaps rendered through FT_Render_Glyph, FT_Load_Glyph, FT_Load_Char, and FT_Glyph_To_Bitmap, when FT_RENDER_MODE_LCD or FT_RENDER_MODE_LCD_V is specified. This API does not control FT_Outline_Render and FT_Outline_Get_Bitmap.

-

The described algorithms can completely remove color artefacts when combined with gamma-corrected alpha blending in linear space. Each of the 3 alpha values (subpixels) must by independently used to blend one color channel. That is, red alpha blends the red channel of the text color with the red channel of the background pixel.

-

FT_LcdFilter

-

Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).

-
-
-  typedef enum  FT_LcdFilter_
-  {
-    FT_LCD_FILTER_NONE    = 0,
-    FT_LCD_FILTER_DEFAULT = 1,
-    FT_LCD_FILTER_LIGHT   = 2,
-    FT_LCD_FILTER_LEGACY1 = 3,
-    FT_LCD_FILTER_LEGACY  = 16,
-
-    FT_LCD_FILTER_MAX   /* do not remove */
-
-  } FT_LcdFilter;
-
-
- -

A list of values to identify various types of LCD filters.

-

values

- - - - - - - -
FT_LCD_FILTER_NONE -

Do not perform filtering. When used with subpixel rendering, this results in sometimes severe color fringes.

-
FT_LCD_FILTER_DEFAULT -

This is a beveled, normalized, and color-balanced five-tap filter with weights of [0x08 0x4D 0x56 0x4D 0x08] in 1/256th units.

-
FT_LCD_FILTER_LIGHT -

this is a boxy, normalized, and color-balanced three-tap filter with weights of [0x00 0x55 0x56 0x55 0x00] in 1/256th units.

-
FT_LCD_FILTER_LEGACY - -
FT_LCD_FILTER_LEGACY1 -

This filter corresponds to the original libXft color filter. It provides high contrast output but can exhibit really bad color fringes if glyphs are not extremely well hinted to the pixel grid. This filter is only provided for comparison purposes, and might be disabled or stay unsupported in the future. The second value is provided for compatibility with FontConfig, which historically used different enumeration, sometimes incorrectly forwarded to FreeType.

-
- -

since

- -

2.3.0 (FT_LCD_FILTER_LEGACY1 since 2.6.2)

-
- -

FT_Library_SetLcdFilter

-

Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Library_SetLcdFilter( FT_Library    library,
-                           FT_LcdFilter  filter );
-
-
- -

This function is used to apply color filtering to LCD decimated bitmaps, like the ones used when calling FT_Render_Glyph with FT_RENDER_MODE_LCD or FT_RENDER_MODE_LCD_V.

-

input

- - - - -
library -

A handle to the target library instance.

-
filter -

The filter type.

-

You can use FT_LCD_FILTER_NONE here to disable this feature, or FT_LCD_FILTER_DEFAULT to use a default filter that should work well on most LCD screens.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This feature is always disabled by default. Clients must make an explicit call to this function with a filter value other than FT_LCD_FILTER_NONE in order to enable it.

-

Due to PATENTS covering subpixel rendering, this function doesn't do anything except returning FT_Err_Unimplemented_Feature if the configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not defined in your build of the library, which should correspond to all default builds of FreeType.

-

since

- -

2.3.0

-
- -

FT_Library_SetLcdFilterWeights

-

Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Library_SetLcdFilterWeights( FT_Library      library,
-                                  unsigned char  *weights );
-
-
- -

This function can be used to enable LCD filter with custom weights, instead of using presets in FT_Library_SetLcdFilter.

-

input

- - - - -
library -

A handle to the target library instance.

-
weights -

A pointer to an array; the function copies the first five bytes and uses them to specify the filter weights in 1/256th units.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Due to PATENTS covering subpixel rendering, this function doesn't do anything except returning FT_Err_Unimplemented_Feature if the configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not defined in your build of the library, which should correspond to all default builds of FreeType.

-

LCD filter weights can also be set per face using FT_Face_Properties with FT_PARAM_TAG_LCD_FILTER_WEIGHTS.

-

since

- -

2.4.0

-
- -

FT_LcdFiveTapFilter

-

Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).

-
-
-#define FT_LCD_FILTER_FIVE_TAPS  5
-
-  typedef FT_Byte  FT_LcdFiveTapFilter[FT_LCD_FILTER_FIVE_TAPS];
-
-
- -

A typedef for passing the five LCD filter weights to FT_Face_Properties within an FT_Parameter structure.

-

since

- -

2.8

-
- -

FT_Library_SetLcdGeometry

-

Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Library_SetLcdGeometry( FT_Library  library,
-                             FT_Vector   sub[3] );
-
-
- -

This function can be used to modify default positions of color subpixels, which controls Harmony LCD rendering.

-

input

- - - - -
library -

A handle to the target library instance.

-
sub -

A pointer to an array of 3 vectors in 26.6 fractional pixel format; the function modifies the default values, see the note below.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Subpixel geometry examples:

-
    -
  • -

    {{-21, 0}, {0, 0}, {21, 0}} is the default, corresponding to 3 color stripes shifted by a third of a pixel. This could be an RGB panel.

    -
    • -
  • -

    {{21, 0}, {0, 0}, {-21, 0}} looks the same as the default but can specify a BGR panel instead, while keeping the bitmap in the same RGB888 format.

    -
    • -
  • -

    {{0, 21}, {0, 0}, {0, -21}} is the vertical RGB, but the bitmap stays RGB888 as a result.

    -
    • -
  • -

    {{-11, 16}, {-11, -16}, {22, 0}} is a certain PenTile arrangement.

    -
    • -
-

This function does nothing and returns FT_Err_Unimplemented_Feature in the context of ClearType-style subpixel rendering when FT_CONFIG_OPTION_SUBPIXEL_RENDERING is defined in your build of the library.

-

since

- -

2.10.0

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FreeType » Docs » Support API » List Processing

-
-

List Processing

-

Synopsis

-

This section contains various definitions related to list processing using doubly-linked nodes.

-

FT_List

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct FT_ListRec_*  FT_List;
-
-
- -

A handle to a list record (see FT_ListRec).

-
- -

FT_ListNode

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct FT_ListNodeRec_*  FT_ListNode;
-
-
- -

Many elements and objects in FreeType are listed through an FT_List record (see FT_ListRec). As its name suggests, an FT_ListNode is a handle to a single list element.

-
- -

FT_ListRec

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct  FT_ListRec_
-  {
-    FT_ListNode  head;
-    FT_ListNode  tail;
-
-  } FT_ListRec;
-
-
- -

A structure used to hold a simple doubly-linked list. These are used in many parts of FreeType.

-

fields

- - - - -
-

The head (first element) of doubly-linked list.

-
tail -

The tail (last element) of doubly-linked list.

-
- -
- -

FT_ListNodeRec

-

Defined in FT_TYPES_H (freetype/fttypes.h).

-
-
-  typedef struct  FT_ListNodeRec_
-  {
-    FT_ListNode  prev;
-    FT_ListNode  next;
-    void*        data;
-
-  } FT_ListNodeRec;
-
-
- -

A structure used to hold a single list element.

-

fields

- - - - - -
prev -

The previous element in the list. NULL if first.

-
next -

The next element in the list. NULL if last.

-
data -

A typeless pointer to the listed object.

-
- -
- -

FT_List_Add

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( void )
-  FT_List_Add( FT_List      list,
-               FT_ListNode  node );
-
-
- -

Append an element to the end of a list.

-

inout

- - - - -
list -

A pointer to the parent list.

-
node -

The node to append.

-
- -
- -

FT_List_Insert

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( void )
-  FT_List_Insert( FT_List      list,
-                  FT_ListNode  node );
-
-
- -

Insert an element at the head of a list.

-

inout

- - - - -
list -

A pointer to parent list.

-
node -

The node to insert.

-
- -
- -

FT_List_Find

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( FT_ListNode )
-  FT_List_Find( FT_List  list,
-                void*    data );
-
-
- -

Find the list node for a given listed object.

-

input

- - - - -
list -

A pointer to the parent list.

-
data -

The address of the listed object.

-
- -

return

- -

List node. NULL if it wasn't found.

-
- -

FT_List_Remove

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( void )
-  FT_List_Remove( FT_List      list,
-                  FT_ListNode  node );
-
-
- -

Remove a node from a list. This function doesn't check whether the node is in the list!

-

input

- - - -
node -

The node to remove.

-
- -

inout

- - - -
list -

A pointer to the parent list.

-
- -
- -

FT_List_Up

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( void )
-  FT_List_Up( FT_List      list,
-              FT_ListNode  node );
-
-
- -

Move a node to the head/top of a list. Used to maintain LRU lists.

-

inout

- - - - -
list -

A pointer to the parent list.

-
node -

The node to move.

-
- -
- -

FT_List_Iterate

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_List_Iterate( FT_List           list,
-                   FT_List_Iterator  iterator,
-                   void*             user );
-
-
- -

Parse a list and calls a given iterator function on each element. Note that parsing is stopped as soon as one of the iterator calls returns a non-zero value.

-

input

- - - - - -
list -

A handle to the list.

-
iterator -

An iterator function, called on each node of the list.

-
user -

A user-supplied field that is passed as the second argument to the iterator.

-
- -

return

- -

The result (a FreeType error code) of the last iterator call.

-
- -

FT_List_Iterator

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  typedef FT_Error
-  (*FT_List_Iterator)( FT_ListNode  node,
-                       void*        user );
-
-
- -

An FT_List iterator function that is called during a list parse by FT_List_Iterate.

-

input

- - - - -
node -

The current iteration list node.

-
user -

A typeless pointer passed to FT_List_Iterate. Can be used to point to the iteration's state.

-
- -
- -

FT_List_Finalize

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  FT_EXPORT( void )
-  FT_List_Finalize( FT_List             list,
-                    FT_List_Destructor  destroy,
-                    FT_Memory           memory,
-                    void*               user );
-
-
- -

Destroy all elements in the list as well as the list itself.

-

input

- - - - - - -
list -

A handle to the list.

-
destroy -

A list destructor that will be applied to each element of the list. Set this to NULL if not needed.

-
memory -

The current memory object that handles deallocation.

-
user -

A user-supplied field that is passed as the last argument to the destructor.

-
- -

note

- -

This function expects that all nodes added by FT_List_Add or FT_List_Insert have been dynamically allocated.

-
- -

FT_List_Destructor

-

Defined in FT_LIST_H (freetype/ftlist.h).

-
-
-  typedef void
-  (*FT_List_Destructor)( FT_Memory  memory,
-                         void*      data,
-                         void*      user );
-
-
- -

An FT_List iterator function that is called during a list finalization by FT_List_Finalize to destroy all elements in a given list.

-

input

- - - - - -
system -

The current system object.

-
data -

The current object to destroy.

-
user -

A typeless pointer passed to FT_List_Iterate. It can be used to point to the iteration's state.

-
- -
- - - - - - - - - -
-
-
-
- - - - -
- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-lzw.html b/ThirdParty/freetype/docs/reference/site/ft2-lzw.html deleted file mode 100644 index 4ef5e60..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-lzw.html +++ /dev/null @@ -1,1200 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LZW Streams - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Support API » LZW Streams

-
-

LZW Streams

-

Synopsis

-

This section contains the declaration of LZW-specific functions.

-

FT_Stream_OpenLZW

-

Defined in FT_LZW_H (freetype/ftlzw.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Stream_OpenLZW( FT_Stream  stream,
-                     FT_Stream  source );
-
-
- -

Open a new stream to parse LZW-compressed font files. This is mainly used to support the compressed *.pcf.Z fonts that come with XFree86.

-

input

- - - - -
stream -

The target embedding stream.

-
source -

The source stream.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The source stream must be opened before calling this function.

-

Calling the internal function FT_Stream_Close on the new stream will not call FT_Stream_Close on the source stream. None of the stream objects will be released to the heap.

-

The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream

-

In certain builds of the library, LZW compression recognition is automatically handled when calling FT_New_Face or FT_Open_Face. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a LZW stream from it and re-open the face with it.

-

This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with LZW support.

-
- - - - - - - - - -
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FreeType » Docs » Core API » Mac Specific Interface

-
-

Mac Specific Interface

-

Synopsis

-

The following definitions are only available if FreeType is compiled on a Macintosh.

-

FT_New_Face_From_FOND

-

Defined in FT_MAC_H (freetype/ftmac.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Face_From_FOND( FT_Library  library,
-                         Handle      fond,
-                         FT_Long     face_index,
-                         FT_Face    *aface )
-                       FT_DEPRECATED_ATTRIBUTE;
-
-
- -

Create a new face object from a FOND resource.

-

inout

- - - -
library -

A handle to the library resource.

-
- -

input

- - - - -
fond -

A FOND resource.

-
face_index -

Only supported for the -1 ‘sanity check’ special case.

-
- -

output

- - - -
aface -

A handle to a new face object.

-
- -

return

- -

FreeType error code. 0 means success.

-

example

- -

This function can be used to create FT_Face objects from fonts that are installed in the system as follows. -

  fond  = GetResource( 'FOND', fontName );
-  error = FT_New_Face_From_FOND( library, fond, 0, &face );
-

-
- -

FT_GetFile_From_Mac_Name

-

Defined in FT_MAC_H (freetype/ftmac.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_GetFile_From_Mac_Name( const char*  fontName,
-                            FSSpec*      pathSpec,
-                            FT_Long*     face_index )
-                          FT_DEPRECATED_ATTRIBUTE;
-
-
- -

Return an FSSpec for the disk file containing the named font.

-

input

- - - -
fontName -

Mac OS name of the font (e.g., Times New Roman Bold).

-
- -

output

- - - - -
pathSpec -

FSSpec to the file. For passing to FT_New_Face_From_FSSpec.

-
face_index -

Index of the face. For passing to FT_New_Face_From_FSSpec.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_GetFile_From_Mac_ATS_Name

-

Defined in FT_MAC_H (freetype/ftmac.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_GetFile_From_Mac_ATS_Name( const char*  fontName,
-                                FSSpec*      pathSpec,
-                                FT_Long*     face_index )
-                              FT_DEPRECATED_ATTRIBUTE;
-
-
- -

Return an FSSpec for the disk file containing the named font.

-

input

- - - -
fontName -

Mac OS name of the font in ATS framework.

-
- -

output

- - - - -
pathSpec -

FSSpec to the file. For passing to FT_New_Face_From_FSSpec.

-
face_index -

Index of the face. For passing to FT_New_Face_From_FSSpec.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_GetFilePath_From_Mac_ATS_Name

-

Defined in FT_MAC_H (freetype/ftmac.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_GetFilePath_From_Mac_ATS_Name( const char*  fontName,
-                                    UInt8*       path,
-                                    UInt32       maxPathSize,
-                                    FT_Long*     face_index )
-                                  FT_DEPRECATED_ATTRIBUTE;
-
-
- -

Return a pathname of the disk file and face index for given font name that is handled by ATS framework.

-

input

- - - -
fontName -

Mac OS name of the font in ATS framework.

-
- -

output

- - - - - -
path -

Buffer to store pathname of the file. For passing to FT_New_Face. The client must allocate this buffer before calling this function.

-
maxPathSize -

Lengths of the buffer path that client allocated.

-
face_index -

Index of the face. For passing to FT_New_Face.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_New_Face_From_FSSpec

-

Defined in FT_MAC_H (freetype/ftmac.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Face_From_FSSpec( FT_Library     library,
-                           const FSSpec  *spec,
-                           FT_Long        face_index,
-                           FT_Face       *aface )
-                         FT_DEPRECATED_ATTRIBUTE;
-
-
- -

Create a new face object from a given resource and typeface index using an FSSpec to the font file.

-

inout

- - - -
library -

A handle to the library resource.

-
- -

input

- - - - -
spec -

FSSpec to the font file.

-
face_index -

The index of the face within the resource. The first face has index 0.

-
- -

output

- - - -
aface -

A handle to a new face object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

FT_New_Face_From_FSSpec is identical to FT_New_Face except it accepts an FSSpec instead of a path.

-
- -

FT_New_Face_From_FSRef

-

Defined in FT_MAC_H (freetype/ftmac.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Face_From_FSRef( FT_Library    library,
-                          const FSRef  *ref,
-                          FT_Long       face_index,
-                          FT_Face      *aface )
-                        FT_DEPRECATED_ATTRIBUTE;
-
-
- -

Create a new face object from a given resource and typeface index using an FSRef to the font file.

-

inout

- - - -
library -

A handle to the library resource.

-
- -

input

- - - - -
spec -

FSRef to the font file.

-
face_index -

The index of the face within the resource. The first face has index 0.

-
- -

output

- - - -
aface -

A handle to a new face object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

FT_New_Face_From_FSRef is identical to FT_New_Face except it accepts an FSRef instead of a path.

-
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FreeType » Docs » Support API » Module Management

-
-

Module Management

-

Synopsis

-

The definitions below are used to manage modules within FreeType. Modules can be added, upgraded, and removed at runtime. Additionally, some module properties can be controlled also.

-

Here is a list of possible values of the module_name field in the FT_Module_Class structure. -

  autofitter
-  bdf
-  cff
-  gxvalid
-  otvalid
-  pcf
-  pfr
-  psaux
-  pshinter
-  psnames
-  raster1
-  sfnt
-  smooth, smooth-lcd, smooth-lcdv
-  truetype
-  type1
-  type42
-  t1cid
-  winfonts
-

-

Note that the FreeType Cache sub-system is not a FreeType module.

-

FT_Module

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_ModuleRec_*  FT_Module;
-
-
- -

A handle to a given FreeType module object. A module can be a font driver, a renderer, or anything else that provides services to the former.

-
- -

FT_Module_Constructor

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  typedef FT_Error
-  (*FT_Module_Constructor)( FT_Module  module );
-
-
- -

A function used to initialize (not create) a new module object.

-

input

- - - -
module -

The module to initialize.

-
- -
- -

FT_Module_Destructor

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  typedef void
-  (*FT_Module_Destructor)( FT_Module  module );
-
-
- -

A function used to finalize (not destroy) a given module object.

-

input

- - - -
module -

The module to finalize.

-
- -
- -

FT_Module_Requester

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  typedef FT_Module_Interface
-  (*FT_Module_Requester)( FT_Module    module,
-                          const char*  name );
-
-
- -

A function used to query a given module for a specific interface.

-

input

- - - - -
module -

The module to be searched.

-
name -

The name of the interface in the module.

-
- -
- -

FT_Module_Class

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  typedef struct  FT_Module_Class_
-  {
-    FT_ULong               module_flags;
-    FT_Long                module_size;
-    const FT_String*       module_name;
-    FT_Fixed               module_version;
-    FT_Fixed               module_requires;
-
-    const void*            module_interface;
-
-    FT_Module_Constructor  module_init;
-    FT_Module_Destructor   module_done;
-    FT_Module_Requester    get_interface;
-
-  } FT_Module_Class;
-
-
- -

The module class descriptor. While being a public structure necessary for FreeType's module bookkeeping, most of the fields are essentially internal, not to be used directly by an application.

-

fields

- - - - - - - - - - - -
module_flags -

Bit flags describing the module.

-
module_size -

The size of one module object/instance in bytes.

-
module_name -

The name of the module.

-
module_version -

The version, as a 16.16 fixed number (major.minor).

-
module_requires -

The version of FreeType this module requires, as a 16.16 fixed number (major.minor). Starts at version 2.0, i.e., 0x20000.

-
module_interface -

A typeless pointer to a structure (which varies between different modules) that holds the module's interface functions. This is essentially what get_interface returns.

-
module_init -

The initializing function.

-
module_done -

The finalizing function.

-
get_interface -

The interface requesting function.

-
- -
- -

FT_Add_Module

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Add_Module( FT_Library              library,
-                 const FT_Module_Class*  clazz );
-
-
- -

Add a new module to a given library instance.

-

inout

- - - -
library -

A handle to the library object.

-
- -

input

- - - -
clazz -

A pointer to class descriptor for the module.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great.

-
- -

FT_Get_Module

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Module )
-  FT_Get_Module( FT_Library   library,
-                 const char*  module_name );
-
-
- -

Find a module by its name.

-

input

- - - - -
library -

A handle to the library object.

-
module_name -

The module's name (as an ASCII string).

-
- -

return

- -

A module handle. 0 if none was found.

-

note

- -

FreeType's internal modules aren't documented very well, and you should look up the source code for details.

-
- -

FT_Remove_Module

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Remove_Module( FT_Library  library,
-                    FT_Module   module );
-
-
- -

Remove a given module from a library instance.

-

inout

- - - -
library -

A handle to a library object.

-
- -

input

- - - -
module -

A handle to a module object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The module object is destroyed by the function in case of success.

-
- -

FT_Add_Default_Modules

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( void )
-  FT_Add_Default_Modules( FT_Library  library );
-
-
- -

Add the set of default drivers to a given library object. This is only useful when you create a library object with FT_New_Library (usually to plug a custom memory manager).

-

inout

- - - -
library -

A handle to a new library object.

-
- -
- -

FT_Property_Set

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Property_Set( FT_Library        library,
-                   const FT_String*  module_name,
-                   const FT_String*  property_name,
-                   const void*       value );
-
-
- -

Set a property for a given module.

-

input

- - - - - - -
library -

A handle to the library the module is part of.

-
module_name -

The module name.

-
property_name -

The property name. Properties are described in section ‘Driver properties’.

-

Note that only a few modules have properties.

-
value -

A generic pointer to a variable or structure that gives the new value of the property. The exact definition of value is dependent on the property; see section ‘Driver properties’.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If module_name isn't a valid module name, or property_name doesn't specify a valid property, or if value doesn't represent a valid value for the given property, an error is returned.

-

The following example sets property ‘bar’ (a simple integer) in module ‘foo’ to value 1. -

  FT_UInt  bar;
-
-
-  bar = 1;
-  FT_Property_Set( library, "foo", "bar", &bar );
-

-

Note that the FreeType Cache sub-system doesn't recognize module property changes. To avoid glyph lookup confusion within the cache you should call FTC_Manager_Reset to completely flush the cache if a module property gets changed after FTC_Manager_New has been called.

-

It is not possible to set properties of the FreeType Cache sub-system itself with FT_Property_Set; use ?FTC_Property_Set? instead.

-

since

- -

2.4.11

-
- -

FT_Property_Get

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Property_Get( FT_Library        library,
-                   const FT_String*  module_name,
-                   const FT_String*  property_name,
-                   void*             value );
-
-
- -

Get a module's property value.

-

input

- - - - - -
library -

A handle to the library the module is part of.

-
module_name -

The module name.

-
property_name -

The property name. Properties are described in section ‘Driver properties’.

-
- -

inout

- - - -
value -

A generic pointer to a variable or structure that gives the value of the property. The exact definition of value is dependent on the property; see section ‘Driver properties’.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If module_name isn't a valid module name, or property_name doesn't specify a valid property, or if value doesn't represent a valid value for the given property, an error is returned.

-

The following example gets property ‘baz’ (a range) in module ‘foo’. -

  typedef  range_
-  {
-    FT_Int32  min;
-    FT_Int32  max;
-
-  } range;
-
-  range  baz;
-
-
-  FT_Property_Get( library, "foo", "baz", &baz );
-

-

It is not possible to retrieve properties of the FreeType Cache sub-system with FT_Property_Get; use ?FTC_Property_Get? instead.

-

since

- -

2.4.11

-
- -

FT_Set_Default_Properties

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( void )
-  FT_Set_Default_Properties( FT_Library  library );
-
-
- -

If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the FREETYPE_PROPERTIES environment variable to control driver properties. See section ‘Driver properties’ for more.

-

If the compilation option is not set, this function does nothing.

-

FREETYPE_PROPERTIES has the following syntax form (broken here into multiple lines for better readability). -

  <optional whitespace>
-  <module-name1> ':'
-  <property-name1> '=' <property-value1>
-  <whitespace>
-  <module-name2> ':'
-  <property-name2> '=' <property-value2>
-  ...
-

-

Example: -

  FREETYPE_PROPERTIES=truetype:interpreter-version=35 \
-                      cff:no-stem-darkening=1 \
-                      autofitter:warping=1
-

-

inout

- - - -
library -

A handle to a new library object.

-
- -

since

- -

2.8

-
- -

FT_New_Library

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Library( FT_Memory    memory,
-                  FT_Library  *alibrary );
-
-
- -

This function is used to create a new FreeType library instance from a given memory object. It is thus possible to use libraries with distinct memory allocators within the same program. Note, however, that the used FT_Memory structure is expected to remain valid for the life of the FT_Library object.

-

Normally, you would call this function (followed by a call to FT_Add_Default_Modules or a series of calls to FT_Add_Module, and a call to FT_Set_Default_Properties) instead of FT_Init_FreeType to initialize the FreeType library.

-

Don't use FT_Done_FreeType but FT_Done_Library to destroy a library instance.

-

input

- - - -
memory -

A handle to the original memory object.

-
- -

output

- - - -
alibrary -

A pointer to handle of a new library object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

See the discussion of reference counters in the description of FT_Reference_Library.

-
- -

FT_Done_Library

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Done_Library( FT_Library  library );
-
-
- -

Discard a given library object. This closes all drivers and discards all resource objects.

-

input

- - - -
library -

A handle to the target library.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

See the discussion of reference counters in the description of FT_Reference_Library.

-
- -

FT_Reference_Library

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Reference_Library( FT_Library  library );
-
-
- -

A counter gets initialized to 1 at the time an FT_Library structure is created. This function increments the counter. FT_Done_Library then only destroys a library if the counter is 1, otherwise it simply decrements the counter.

-

This function helps in managing life-cycles of structures that reference FT_Library objects.

-

input

- - - -
library -

A handle to a target library object.

-
- -

return

- -

FreeType error code. 0 means success.

-

since

- -

2.4.2

-
- -

FT_Renderer

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_RendererRec_*  FT_Renderer;
-
-
- -

A handle to a given FreeType renderer. A renderer is a module in charge of converting a glyph's outline image to a bitmap. It supports a single glyph image format, and one or more target surface depths.

-
- -

FT_Renderer_Class

-

Defined in FT_RENDER_H (freetype/ftrender.h).

-
-
-  typedef struct  FT_Renderer_Class_
-  {
-    FT_Module_Class            root;
-
-    FT_Glyph_Format            glyph_format;
-
-    FT_Renderer_RenderFunc     render_glyph;
-    FT_Renderer_TransformFunc  transform_glyph;
-    FT_Renderer_GetCBoxFunc    get_glyph_cbox;
-    FT_Renderer_SetModeFunc    set_mode;
-
-    FT_Raster_Funcs*           raster_class;
-
-  } FT_Renderer_Class;
-
-
- -

The renderer module class descriptor.

-

fields

- - - - - - - - - -
root -

The root FT_Module_Class fields.

-
glyph_format -

The glyph image format this renderer handles.

-
render_glyph -

A method used to render the image that is in a given glyph slot into a bitmap.

-
transform_glyph -

A method used to transform the image that is in a given glyph slot.

-
get_glyph_cbox -

A method used to access the glyph's cbox.

-
set_mode -

A method used to pass additional parameters.

-
raster_class -

For FT_GLYPH_FORMAT_OUTLINE renderers only. This is a pointer to its raster's class.

-
- -
- -

FT_Get_Renderer

-

Defined in FT_RENDER_H (freetype/ftrender.h).

-
-
-  FT_EXPORT( FT_Renderer )
-  FT_Get_Renderer( FT_Library       library,
-                   FT_Glyph_Format  format );
-
-
- -

Retrieve the current renderer for a given glyph format.

-

input

- - - - -
library -

A handle to the library object.

-
format -

The glyph format.

-
- -

return

- -

A renderer handle. 0 if none found.

-

note

- -

An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great.

-

To add a new renderer, simply use FT_Add_Module. To retrieve a renderer by its name, use FT_Get_Module.

-
- -

FT_Set_Renderer

-

Defined in FT_RENDER_H (freetype/ftrender.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Renderer( FT_Library     library,
-                   FT_Renderer    renderer,
-                   FT_UInt        num_params,
-                   FT_Parameter*  parameters );
-
-
- -

Set the current renderer to use, and set additional mode.

-

inout

- - - -
library -

A handle to the library object.

-
- -

input

- - - - - -
renderer -

A handle to the renderer object.

-
num_params -

The number of additional parameters.

-
parameters -

Additional parameters.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

In case of success, the renderer will be used to convert glyph images in the renderer's known format into bitmaps.

-

This doesn't change the current renderer for other formats.

-

Currently, no FreeType renderer module uses parameters; you should thus always pass NULL as the value.

-
- -

FT_Set_Debug_Hook

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( void )
-  FT_Set_Debug_Hook( FT_Library         library,
-                     FT_UInt            hook_index,
-                     FT_DebugHook_Func  debug_hook );
-
-
- -

Set a debug hook function for debugging the interpreter of a font format.

-

While this is a public API function, an application needs access to FreeType's internal header files to do something useful.

-

Have a look at the source code of the ttdebug FreeType demo program for an example of its usage.

-

inout

- - - -
library -

A handle to the library object.

-
- -

input

- - - - -
hook_index -

The index of the debug hook. You should use defined enumeration macros like FT_DEBUG_HOOK_TRUETYPE.

-
debug_hook -

The function used to debug the interpreter.

-
- -

note

- -

Currently, four debug hook slots are available, but only one (for the TrueType interpreter) is defined.

-
- -

FT_Driver

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  typedef struct FT_DriverRec_*  FT_Driver;
-
-
- -

A handle to a given FreeType font driver object. A font driver is a module capable of creating faces from font files.

-
- -

FT_DebugHook_Func

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  typedef void
-  (*FT_DebugHook_Func)( void*  arg );
-
-
- -

A drop-in replacement (or rather a wrapper) for the bytecode or charstring interpreter's main loop function.

-

Its job is essentially

-
    -
  • -

    to activate debug mode to enforce single-stepping,

    -
    • -
  • -

    to call the main loop function to interpret the next opcode, and

    -
    • -
  • -

    to show the changed context to the user.

    -
    • -
-

An example for such a main loop function is TT_RunIns (declared in FreeType's internal header file src/truetype/ttinterp.h).

-

Have a look at the source code of the ttdebug FreeType demo program for an example of a drop-in replacement.

-

inout

- - - -
arg -

A typeless pointer, to be cast to the main loop function's data structure (which depends on the font module). For TrueType fonts it is bytecode interpreter's execution context, TT_ExecContext, which is declared in FreeType's internal header file tttypes.h.

-
- -
- -

FT_DEBUG_HOOK_XXX

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-#define FT_DEBUG_HOOK_TRUETYPE  0
-
-
- -

A list of named debug hook indices.

-

values

- - - -
FT_DEBUG_HOOK_TRUETYPE -

This hook index identifies the TrueType bytecode debugger.

-
- -
- - - - - - - - - -
-
-
-
- - - - -
- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-multiple_masters.html b/ThirdParty/freetype/docs/reference/site/ft2-multiple_masters.html deleted file mode 100644 index a24d9bd..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-multiple_masters.html +++ /dev/null @@ -1,2126 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Multiple Masters - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Format-Specific API » Multiple Masters

-
-

Multiple Masters

-

Synopsis

-

The following types and functions are used to manage Multiple Master fonts, i.e., the selection of specific design instances by setting design axis coordinates.

-

Besides Adobe MM fonts, the interface supports Apple's TrueType GX and OpenType variation fonts. Some of the routines only work with Adobe MM fonts, others will work with all three types. They are similar enough that a consistent interface makes sense.

-

FT_MM_Axis

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  typedef struct  FT_MM_Axis_
-  {
-    FT_String*  name;
-    FT_Long     minimum;
-    FT_Long     maximum;
-
-  } FT_MM_Axis;
-
-
- -

A structure to model a given axis in design space for Multiple Masters fonts.

-

This structure can't be used for TrueType GX or OpenType variation fonts.

-

fields

- - - - - -
name -

The axis's name.

-
minimum -

The axis's minimum design coordinate.

-
maximum -

The axis's maximum design coordinate.

-
- -
- -

FT_Multi_Master

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  typedef struct  FT_Multi_Master_
-  {
-    FT_UInt     num_axis;
-    FT_UInt     num_designs;
-    FT_MM_Axis  axis[T1_MAX_MM_AXIS];
-
-  } FT_Multi_Master;
-
-
- -

A structure to model the axes and space of a Multiple Masters font.

-

This structure can't be used for TrueType GX or OpenType variation fonts.

-

fields

- - - - - -
num_axis -

Number of axes. Cannot exceed 4.

-
num_designs -

Number of designs; should be normally 2^num_axis even though the Type 1 specification strangely allows for intermediate designs to be present. This number cannot exceed 16.

-
axis -

A table of axis descriptors.

-
- -
- -

FT_Var_Axis

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  typedef struct  FT_Var_Axis_
-  {
-    FT_String*  name;
-
-    FT_Fixed    minimum;
-    FT_Fixed    def;
-    FT_Fixed    maximum;
-
-    FT_ULong    tag;
-    FT_UInt     strid;
-
-  } FT_Var_Axis;
-
-
- -

A structure to model a given axis in design space for Multiple Masters, TrueType GX, and OpenType variation fonts.

-

fields

- - - - - - - - -
name -

The axis's name. Not always meaningful for TrueType GX or OpenType variation fonts.

-
minimum -

The axis's minimum design coordinate.

-
def -

The axis's default design coordinate. FreeType computes meaningful default values for Adobe MM fonts.

-
maximum -

The axis's maximum design coordinate.

-
tag -

The axis's tag (the equivalent to ‘name’ for TrueType GX and OpenType variation fonts). FreeType provides default values for Adobe MM fonts if possible.

-
strid -

The axis name entry in the font's ‘name’ table. This is another (and often better) version of the ‘name’ field for TrueType GX or OpenType variation fonts. Not meaningful for Adobe MM fonts.

-
- -

note

- -

The fields minimum, def, and maximum are 16.16 fractional values for TrueType GX and OpenType variation fonts. For Adobe MM fonts, the values are integers.

-
- -

FT_Var_Named_Style

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  typedef struct  FT_Var_Named_Style_
-  {
-    FT_Fixed*  coords;
-    FT_UInt    strid;
-    FT_UInt    psid;   /* since 2.7.1 */
-
-  } FT_Var_Named_Style;
-
-
- -

A structure to model a named instance in a TrueType GX or OpenType variation font.

-

This structure can't be used for Adobe MM fonts.

-

fields

- - - - - -
coords -

The design coordinates for this instance. This is an array with one entry for each axis.

-
strid -

The entry in ‘name’ table identifying this instance.

-
psid -

The entry in ‘name’ table identifying a PostScript name for this instance. Value 0xFFFF indicates a missing entry.

-
- -
- -

FT_MM_Var

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  typedef struct  FT_MM_Var_
-  {
-    FT_UInt              num_axis;
-    FT_UInt              num_designs;
-    FT_UInt              num_namedstyles;
-    FT_Var_Axis*         axis;
-    FT_Var_Named_Style*  namedstyle;
-
-  } FT_MM_Var;
-
-
- -

A structure to model the axes and space of an Adobe MM, TrueType GX, or OpenType variation font.

-

Some fields are specific to one format and not to the others.

-

fields

- - - - - - - -
num_axis -

The number of axes. The maximum value is 4 for Adobe MM fonts; no limit in TrueType GX or OpenType variation fonts.

-
num_designs -

The number of designs; should be normally 2^num_axis for Adobe MM fonts. Not meaningful for TrueType GX or OpenType variation fonts (where every glyph could have a different number of designs).

-
num_namedstyles -

The number of named styles; a ‘named style’ is a tuple of design coordinates that has a string ID (in the ‘name’ table) associated with it. The font can tell the user that, for example, [Weight=1.5,Width=1.1] is ‘Bold’. Another name for ‘named style’ is ‘named instance’.

-

For Adobe Multiple Masters fonts, this value is always zero because the format does not support named styles.

-
axis -

An axis descriptor table. TrueType GX and OpenType variation fonts contain slightly more data than Adobe MM fonts. Memory management of this pointer is done internally by FreeType.

-
namedstyle -

A named style (instance) table. Only meaningful for TrueType GX and OpenType variation fonts. Memory management of this pointer is done internally by FreeType.

-
- -
- -

FT_Get_Multi_Master

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Multi_Master( FT_Face           face,
-                       FT_Multi_Master  *amaster );
-
-
- -

Retrieve a variation descriptor of a given Adobe MM font.

-

This function can't be used with TrueType GX or OpenType variation fonts.

-

input

- - - -
face -

A handle to the source face.

-
- -

output

- - - -
amaster -

The Multiple Masters descriptor.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Get_MM_Var

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_MM_Var( FT_Face      face,
-                 FT_MM_Var*  *amaster );
-
-
- -

Retrieve a variation descriptor for a given font.

-

This function works with all supported variation formats.

-

input

- - - -
face -

A handle to the source face.

-
- -

output

- - - -
amaster -

The variation descriptor. Allocates a data structure, which the user must deallocate with a call to FT_Done_MM_Var after use.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Done_MM_Var

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Done_MM_Var( FT_Library   library,
-                  FT_MM_Var   *amaster );
-
-
- -

Free the memory allocated by FT_Get_MM_Var.

-

input

- - - -
library -

A handle of the face's parent library object that was used in the call to FT_Get_MM_Var to create amaster.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Set_MM_Design_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_MM_Design_Coordinates( FT_Face   face,
-                                FT_UInt   num_coords,
-                                FT_Long*  coords );
-
-
- -

For Adobe MM fonts, choose an interpolated font design through design coordinates.

-

This function can't be used with TrueType GX or OpenType variation fonts.

-

inout

- - - -
face -

A handle to the source face.

-
- -

input

- - - - -
num_coords -

The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes.

-
coords -

An array of design coordinates.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

[Since 2.8.1] To reset all axes to the default values, call the function with num_coords set to zero and coords set to NULL.

-

[Since 2.9] If num_coords is larger than zero, this function sets the FT_FACE_FLAG_VARIATION bit in FT_Face's face_flags field (i.e., FT_IS_VARIATION will return true). If num_coords is zero, this bit flag gets unset.

-
- -

FT_Set_Var_Design_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Var_Design_Coordinates( FT_Face    face,
-                                 FT_UInt    num_coords,
-                                 FT_Fixed*  coords );
-
-
- -

Choose an interpolated font design through design coordinates.

-

This function works with all supported variation formats.

-

inout

- - - -
face -

A handle to the source face.

-
- -

input

- - - - -
num_coords -

The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes.

-
coords -

An array of design coordinates.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

[Since 2.8.1] To reset all axes to the default values, call the function with num_coords set to zero and coords set to NULL. [Since 2.9] ‘Default values’ means the currently selected named instance (or the base font if no named instance is selected).

-

[Since 2.9] If num_coords is larger than zero, this function sets the FT_FACE_FLAG_VARIATION bit in FT_Face's face_flags field (i.e., FT_IS_VARIATION will return true). If num_coords is zero, this bit flag gets unset.

-
- -

FT_Get_Var_Design_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Var_Design_Coordinates( FT_Face    face,
-                                 FT_UInt    num_coords,
-                                 FT_Fixed*  coords );
-
-
- -

Get the design coordinates of the currently selected interpolated font.

-

This function works with all supported variation formats.

-

input

- - - - -
face -

A handle to the source face.

-
num_coords -

The number of design coordinates to retrieve. If it is larger than the number of axes, set the excess values to 0.

-
- -

output

- - - -
coords -

The design coordinates array.

-
- -

return

- -

FreeType error code. 0 means success.

-

since

- -

2.7.1

-
- -

FT_Set_MM_Blend_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_MM_Blend_Coordinates( FT_Face    face,
-                               FT_UInt    num_coords,
-                               FT_Fixed*  coords );
-
-
- -

Choose an interpolated font design through normalized blend coordinates.

-

This function works with all supported variation formats.

-

inout

- - - -
face -

A handle to the source face.

-
- -

input

- - - - -
num_coords -

The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes.

-
coords -

The design coordinates array (each element must be between 0 and 1.0 for Adobe MM fonts, and between -1.0 and 1.0 for TrueType GX and OpenType variation fonts).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

[Since 2.8.1] To reset all axes to the default values, call the function with num_coords set to zero and coords set to NULL. [Since 2.9] ‘Default values’ means the currently selected named instance (or the base font if no named instance is selected).

-

[Since 2.9] If num_coords is larger than zero, this function sets the FT_FACE_FLAG_VARIATION bit in FT_Face's face_flags field (i.e., FT_IS_VARIATION will return true). If num_coords is zero, this bit flag gets unset.

-
- -

FT_Get_MM_Blend_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_MM_Blend_Coordinates( FT_Face    face,
-                               FT_UInt    num_coords,
-                               FT_Fixed*  coords );
-
-
- -

Get the normalized blend coordinates of the currently selected interpolated font.

-

This function works with all supported variation formats.

-

input

- - - - -
face -

A handle to the source face.

-
num_coords -

The number of normalized blend coordinates to retrieve. If it is larger than the number of axes, set the excess values to 0.5 for Adobe MM fonts, and to 0 for TrueType GX and OpenType variation fonts.

-
- -

output

- - - -
coords -

The normalized blend coordinates array.

-
- -

return

- -

FreeType error code. 0 means success.

-

since

- -

2.7.1

-
- -

FT_Set_Var_Blend_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Var_Blend_Coordinates( FT_Face    face,
-                                FT_UInt    num_coords,
-                                FT_Fixed*  coords );
-
-
- -

This is another name of FT_Set_MM_Blend_Coordinates.

-
- -

FT_Get_Var_Blend_Coordinates

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Var_Blend_Coordinates( FT_Face    face,
-                                FT_UInt    num_coords,
-                                FT_Fixed*  coords );
-
-
- -

This is another name of FT_Get_MM_Blend_Coordinates.

-

since

- -

2.7.1

-
- -

FT_Set_MM_WeightVector

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_MM_WeightVector( FT_Face    face,
-                          FT_UInt    len,
-                          FT_Fixed*  weightvector );
-
-
- -

For Adobe MM fonts, choose an interpolated font design by directly setting the weight vector.

-

This function can't be used with TrueType GX or OpenType variation fonts.

-

inout

- - - -
face -

A handle to the source face.

-
- -

input

- - - - -
len -

The length of the weight vector array. If it is larger than the number of designs, the extra values are ignored. If it is less than the number of designs, the remaining values are set to zero.

-
weightvector -

An array representing the weight vector.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Adobe Multiple Master fonts limit the number of designs, and thus the length of the weight vector to 16.

-

If len is zero and weightvector is NULL, the weight vector array is reset to the default values.

-

The Adobe documentation also states that the values in the WeightVector array must total 1.0 ± 0.001. In practice this does not seem to be enforced, so is not enforced here, either.

-

since

- -

2.10

-
- -

FT_Get_MM_WeightVector

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_MM_WeightVector( FT_Face    face,
-                          FT_UInt*   len,
-                          FT_Fixed*  weightvector );
-
-
- -

For Adobe MM fonts, retrieve the current weight vector of the font.

-

This function can't be used with TrueType GX or OpenType variation fonts.

-

inout

- - - - -
face -

A handle to the source face.

-
len -

A pointer to the size of the array to be filled. If the size of the array is less than the number of designs, FT_Err_Invalid_Argument is returned, and len is set to the required size (the number of designs). If the size of the array is greater than the number of designs, the remaining entries are set to 0. On successful completion, len is set to the number of designs (i.e., the number of values written to the array).

-
- -

output

- - - -
weightvector -

An array to be filled.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

Adobe Multiple Master fonts limit the number of designs, and thus the length of the WeightVector to 16.

-

since

- -

2.10

-
- -

FT_VAR_AXIS_FLAG_XXX

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-#define FT_VAR_AXIS_FLAG_HIDDEN  1
-
-
- -

A list of bit flags used in the return value of FT_Get_Var_Axis_Flags.

-

values

- - - -
FT_VAR_AXIS_FLAG_HIDDEN -

The variation axis should not be exposed to user interfaces.

-
- -

since

- -

2.8.1

-
- -

FT_Get_Var_Axis_Flags

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Var_Axis_Flags( FT_MM_Var*  master,
-                         FT_UInt     axis_index,
-                         FT_UInt*    flags );
-
-
- -

Get the ‘flags’ field of an OpenType Variation Axis Record.

-

Not meaningful for Adobe MM fonts (*flags is always zero).

-

input

- - - - -
master -

The variation descriptor.

-
axis_index -

The index of the requested variation axis.

-
- -

output

- - - -
flags -

The ‘flags’ field. See FT_VAR_AXIS_FLAG_XXX for possible values.

-
- -

return

- -

FreeType error code. 0 means success.

-

since

- -

2.8.1

-
- -

FT_Set_Named_Instance

-

Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Set_Named_Instance( FT_Face  face,
-                         FT_UInt  instance_index );
-
-
- -

Set or change the current named instance.

-

input

- - - - -
face -

A handle to the source face.

-
instance_index -

The index of the requested instance, starting with value 1. If set to value 0, FreeType switches to font access without a named instance.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The function uses the value of instance_index to set bits 16-30 of the face's face_index field. It also resets any variation applied to the font, and the FT_FACE_FLAG_VARIATION bit of the face's face_flags field gets reset to zero (i.e., FT_IS_VARIATION will return false).

-

For Adobe MM fonts (which don't have named instances) this function simply resets the current face to the default instance.

-

since

- -

2.9

-
- - - - - - - - - -
-
-
-
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- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-ot_validation.html b/ThirdParty/freetype/docs/reference/site/ft2-ot_validation.html deleted file mode 100644 index f63a82a..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-ot_validation.html +++ /dev/null @@ -1,1326 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - OpenType Validation - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Miscellaneous » OpenType Validation

-
-

OpenType Validation

-

Synopsis

-

This section contains the declaration of functions to validate some OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).

-

FT_OpenType_Validate

-

Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_OpenType_Validate( FT_Face    face,
-                        FT_UInt    validation_flags,
-                        FT_Bytes  *BASE_table,
-                        FT_Bytes  *GDEF_table,
-                        FT_Bytes  *GPOS_table,
-                        FT_Bytes  *GSUB_table,
-                        FT_Bytes  *JSTF_table );
-
-
- -

Validate various OpenType tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).

-

input

- - - - -
face -

A handle to the input face.

-
validation_flags -

A bit field that specifies the tables to be validated. See FT_VALIDATE_OTXXX for possible values.

-
- -

output

- - - - - - - -
BASE_table -

A pointer to the BASE table.

-
GDEF_table -

A pointer to the GDEF table.

-
GPOS_table -

A pointer to the GPOS table.

-
GSUB_table -

A pointer to the GSUB table.

-
JSTF_table -

A pointer to the JSTF table.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function only works with OpenType fonts, returning an error otherwise.

-

After use, the application should deallocate the five tables with FT_OpenType_Free. A NULL value indicates that the table either doesn't exist in the font, or the application hasn't asked for validation.

-
- -

FT_OpenType_Free

-

Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).

-
-
-  FT_EXPORT( void )
-  FT_OpenType_Free( FT_Face   face,
-                    FT_Bytes  table );
-
-
- -

Free the buffer allocated by OpenType validator.

-

input

- - - - -
face -

A handle to the input face.

-
table -

The pointer to the buffer that is allocated by FT_OpenType_Validate.

-
- -

note

- -

This function must be used to free the buffer allocated by FT_OpenType_Validate only.

-
- -

FT_VALIDATE_OTXXX

-

Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).

-
-
-#define FT_VALIDATE_BASE  0x0100
-#define FT_VALIDATE_GDEF  0x0200
-#define FT_VALIDATE_GPOS  0x0400
-#define FT_VALIDATE_GSUB  0x0800
-#define FT_VALIDATE_JSTF  0x1000
-#define FT_VALIDATE_MATH  0x2000
-
-#define FT_VALIDATE_OT  ( FT_VALIDATE_BASE | \
-                          FT_VALIDATE_GDEF | \
-                          FT_VALIDATE_GPOS | \
-                          FT_VALIDATE_GSUB | \
-                          FT_VALIDATE_JSTF | \
-                          FT_VALIDATE_MATH )
-
-
- -

A list of bit-field constants used with FT_OpenType_Validate to indicate which OpenType tables should be validated.

-

values

- - - - - - - - - -
FT_VALIDATE_BASE -

Validate BASE table.

-
FT_VALIDATE_GDEF -

Validate GDEF table.

-
FT_VALIDATE_GPOS -

Validate GPOS table.

-
FT_VALIDATE_GSUB -

Validate GSUB table.

-
FT_VALIDATE_JSTF -

Validate JSTF table.

-
FT_VALIDATE_MATH -

Validate MATH table.

-
FT_VALIDATE_OT -

Validate all OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).

-
- -
- - - - - - - - - -
-
-
-
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- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-outline_processing.html b/ThirdParty/freetype/docs/reference/site/ft2-outline_processing.html deleted file mode 100644 index 2c9a3e4..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-outline_processing.html +++ /dev/null @@ -1,2314 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Outline Processing - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Support API » Outline Processing

-
-

Outline Processing

-

Synopsis

-

This section contains routines used to create and destroy scalable glyph images known as ‘outlines’. These can also be measured, transformed, and converted into bitmaps and pixmaps.

-

FT_Outline

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Outline_
-  {
-    short       n_contours;      /* number of contours in glyph        */
-    short       n_points;        /* number of points in the glyph      */
-
-    FT_Vector*  points;          /* the outline's points               */
-    char*       tags;            /* the points flags                   */
-    short*      contours;        /* the contour end points             */
-
-    int         flags;           /* outline masks                      */
-
-  } FT_Outline;
-
-
- -

This structure is used to describe an outline to the scan-line converter.

-

fields

- - - - - - - - -
n_contours -

The number of contours in the outline.

-
n_points -

The number of points in the outline.

-
points -

A pointer to an array of n_points FT_Vector elements, giving the outline's point coordinates.

-
tags -

A pointer to an array of n_points chars, giving each outline point's type.

-

If bit 0 is unset, the point is ‘off’ the curve, i.e., a Bezier control point, while it is ‘on’ if set.

-

Bit 1 is meaningful for ‘off’ points only. If set, it indicates a third-order Bezier arc control point; and a second-order control point if unset.

-

If bit 2 is set, bits 5-7 contain the drop-out mode (as defined in the OpenType specification; the value is the same as the argument to the ‘SCANMODE’ instruction).

-

Bits 3 and 4 are reserved for internal purposes.

-
contours -

An array of n_contours shorts, giving the end point of each contour within the outline. For example, the first contour is defined by the points ‘0’ to contours[0], the second one is defined by the points contours[0]+1 to contours[1], etc.

-
flags -

A set of bit flags used to characterize the outline and give hints to the scan-converter and hinter on how to convert/grid-fit it. See FT_OUTLINE_XXX.

-
- -

note

- -

The B/W rasterizer only checks bit 2 in the tags array for the first point of each contour. The drop-out mode as given with FT_OUTLINE_IGNORE_DROPOUTS, FT_OUTLINE_SMART_DROPOUTS, and FT_OUTLINE_INCLUDE_STUBS in flags is then overridden.

-
- -

FT_Outline_New

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_New( FT_Library   library,
-                  FT_UInt      numPoints,
-                  FT_Int       numContours,
-                  FT_Outline  *anoutline );
-
-
- -

Create a new outline of a given size.

-

input

- - - - - -
library -

A handle to the library object from where the outline is allocated. Note however that the new outline will not necessarily be freed, when destroying the library, by FT_Done_FreeType.

-
numPoints -

The maximum number of points within the outline. Must be smaller than or equal to 0xFFFF (65535).

-
numContours -

The maximum number of contours within the outline. This value must be in the range 0 to numPoints.

-
- -

output

- - - -
anoutline -

A handle to the new outline.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The reason why this function takes a library parameter is simply to use the library's memory allocator.

-
- -

FT_Outline_Done

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Done( FT_Library   library,
-                   FT_Outline*  outline );
-
-
- -

Destroy an outline created with FT_Outline_New.

-

input

- - - - -
library -

A handle of the library object used to allocate the outline.

-
outline -

A pointer to the outline object to be discarded.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If the outline's ‘owner’ field is not set, only the outline descriptor will be released.

-
- -

FT_Outline_Copy

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Copy( const FT_Outline*  source,
-                   FT_Outline        *target );
-
-
- -

Copy an outline into another one. Both objects must have the same sizes (number of points & number of contours) when this function is called.

-

input

- - - -
source -

A handle to the source outline.

-
- -

output

- - - -
target -

A handle to the target outline.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Outline_Translate

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( void )
-  FT_Outline_Translate( const FT_Outline*  outline,
-                        FT_Pos             xOffset,
-                        FT_Pos             yOffset );
-
-
- -

Apply a simple translation to the points of an outline.

-

inout

- - - -
outline -

A pointer to the target outline descriptor.

-
- -

input

- - - - -
xOffset -

The horizontal offset.

-
yOffset -

The vertical offset.

-
- -
- -

FT_Outline_Transform

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( void )
-  FT_Outline_Transform( const FT_Outline*  outline,
-                        const FT_Matrix*   matrix );
-
-
- -

Apply a simple 2x2 matrix to all of an outline's points. Useful for applying rotations, slanting, flipping, etc.

-

inout

- - - -
outline -

A pointer to the target outline descriptor.

-
- -

input

- - - -
matrix -

A pointer to the transformation matrix.

-
- -

note

- -

You can use FT_Outline_Translate if you need to translate the outline's points.

-
- -

FT_Outline_Embolden

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Embolden( FT_Outline*  outline,
-                       FT_Pos       strength );
-
-
- -

Embolden an outline. The new outline will be at most 4 times strength pixels wider and higher. You may think of the left and bottom borders as unchanged.

-

Negative strength values to reduce the outline thickness are possible also.

-

inout

- - - -
outline -

A handle to the target outline.

-
- -

input

- - - -
strength -

How strong the glyph is emboldened. Expressed in 26.6 pixel format.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The used algorithm to increase or decrease the thickness of the glyph doesn't change the number of points; this means that certain situations like acute angles or intersections are sometimes handled incorrectly.

-

If you need ‘better’ metrics values you should call FT_Outline_Get_CBox or FT_Outline_Get_BBox.

-

To get meaningful results, font scaling values must be set with functions like FT_Set_Char_Size before calling FT_Render_Glyph.

-

example

- -
  FT_Load_Glyph( face, index, FT_LOAD_DEFAULT );
-
-  if ( face->glyph->format == FT_GLYPH_FORMAT_OUTLINE )
-    FT_Outline_Embolden( &face->glyph->outline, strength );
-
- -
- -

FT_Outline_EmboldenXY

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_EmboldenXY( FT_Outline*  outline,
-                         FT_Pos       xstrength,
-                         FT_Pos       ystrength );
-
-
- -

Embolden an outline. The new outline will be xstrength pixels wider and ystrength pixels higher. Otherwise, it is similar to FT_Outline_Embolden, which uses the same strength in both directions.

-

since

- -

2.4.10

-
- -

FT_Outline_Reverse

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( void )
-  FT_Outline_Reverse( FT_Outline*  outline );
-
-
- -

Reverse the drawing direction of an outline. This is used to ensure consistent fill conventions for mirrored glyphs.

-

inout

- - - -
outline -

A pointer to the target outline descriptor.

-
- -

note

- -

This function toggles the bit flag FT_OUTLINE_REVERSE_FILL in the outline's flags field.

-

It shouldn't be used by a normal client application, unless it knows what it is doing.

-
- -

FT_Outline_Check

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Check( FT_Outline*  outline );
-
-
- -

Check the contents of an outline descriptor.

-

input

- - - -
outline -

A handle to a source outline.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

An empty outline, or an outline with a single point only is also valid.

-
- -

FT_Outline_Get_CBox

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( void )
-  FT_Outline_Get_CBox( const FT_Outline*  outline,
-                       FT_BBox           *acbox );
-
-
- -

Return an outline's ‘control box’. The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs).

-

Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the ‘ftbbox’ component, which is dedicated to this single task.

-

input

- - - -
outline -

A pointer to the source outline descriptor.

-
- -

output

- - - -
acbox -

The outline's control box.

-
- -

note

- -

See FT_Glyph_Get_CBox for a discussion of tricky fonts.

-
- -

FT_Outline_Get_BBox

-

Defined in FT_BBOX_H (freetype/ftbbox.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Get_BBox( FT_Outline*  outline,
-                       FT_BBox     *abbox );
-
-
- -

Compute the exact bounding box of an outline. This is slower than computing the control box. However, it uses an advanced algorithm that returns very quickly when the two boxes coincide. Otherwise, the outline Bezier arcs are traversed to extract their extrema.

-

input

- - - -
outline -

A pointer to the source outline.

-
- -

output

- - - -
abbox -

The outline's exact bounding box.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If the font is tricky and the glyph has been loaded with FT_LOAD_NO_SCALE, the resulting BBox is meaningless. To get reasonable values for the BBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the BBox, which can be eventually converted back to font units.

-
- -

FT_Outline_Get_Bitmap

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Get_Bitmap( FT_Library        library,
-                         FT_Outline*       outline,
-                         const FT_Bitmap  *abitmap );
-
-
- -

Render an outline within a bitmap. The outline's image is simply OR-ed to the target bitmap.

-

input

- - - - -
library -

A handle to a FreeType library object.

-
outline -

A pointer to the source outline descriptor.

-
- -

inout

- - - -
abitmap -

A pointer to the target bitmap descriptor.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function does not create the bitmap, it only renders an outline image within the one you pass to it! Consequently, the various fields in abitmap should be set accordingly.

-

It will use the raster corresponding to the default glyph format.

-

The value of the num_grays field in abitmap is ignored. If you select the gray-level rasterizer, and you want less than 256 gray levels, you have to use FT_Outline_Render directly.

-
- -

FT_Outline_Render

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Render( FT_Library         library,
-                     FT_Outline*        outline,
-                     FT_Raster_Params*  params );
-
-
- -

Render an outline within a bitmap using the current scan-convert. This function uses an FT_Raster_Params structure as an argument, allowing advanced features like direct composition, translucency, etc.

-

input

- - - - -
library -

A handle to a FreeType library object.

-
outline -

A pointer to the source outline descriptor.

-
- -

inout

- - - -
params -

A pointer to an FT_Raster_Params structure used to describe the rendering operation.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You should know what you are doing and how FT_Raster_Params works to use this function.

-

The field params.source will be set to outline before the scan converter is called, which means that the value you give to it is actually ignored.

-

The gray-level rasterizer always uses 256 gray levels. If you want less gray levels, you have to provide your own span callback. See the FT_RASTER_FLAG_DIRECT value of the flags field in the FT_Raster_Params structure for more details.

-
- -

FT_Outline_Decompose

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Outline_Decompose( FT_Outline*              outline,
-                        const FT_Outline_Funcs*  func_interface,
-                        void*                    user );
-
-
- -

Walk over an outline's structure to decompose it into individual segments and Bezier arcs. This function also emits ‘move to’ operations to indicate the start of new contours in the outline.

-

input

- - - - -
outline -

A pointer to the source target.

-
func_interface -

A table of ‘emitters’, i.e., function pointers called during decomposition to indicate path operations.

-
- -

inout

- - - -
user -

A typeless pointer that is passed to each emitter during the decomposition. It can be used to store the state during the decomposition.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

A contour that contains a single point only is represented by a ‘move to’ operation followed by ‘line to’ to the same point. In most cases, it is best to filter this out before using the outline for stroking purposes (otherwise it would result in a visible dot when round caps are used).

-

Similarly, the function returns success for an empty outline also (doing nothing, this is, not calling any emitter); if necessary, you should filter this out, too.

-
- -

FT_Outline_Funcs

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Outline_Funcs_
-  {
-    FT_Outline_MoveToFunc   move_to;
-    FT_Outline_LineToFunc   line_to;
-    FT_Outline_ConicToFunc  conic_to;
-    FT_Outline_CubicToFunc  cubic_to;
-
-    int                     shift;
-    FT_Pos                  delta;
-
-  } FT_Outline_Funcs;
-
-
- -

A structure to hold various function pointers used during outline decomposition in order to emit segments, conic, and cubic Beziers.

-

fields

- - - - - - - - -
move_to -

The ‘move to’ emitter.

-
line_to -

The segment emitter.

-
conic_to -

The second-order Bezier arc emitter.

-
cubic_to -

The third-order Bezier arc emitter.

-
shift -

The shift that is applied to coordinates before they are sent to the emitter.

-
delta -

The delta that is applied to coordinates before they are sent to the emitter, but after the shift.

-
- -

note

- -

The point coordinates sent to the emitters are the transformed version of the original coordinates (this is important for high accuracy during scan-conversion). The transformation is simple: -

  x' = (x << shift) - delta
-  y' = (y << shift) - delta
-

-

Set the values of shift and delta to 0 to get the original point coordinates.

-
- -

FT_Outline_MoveToFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Outline_MoveToFunc)( const FT_Vector*  to,
-                            void*             user );
-
-#define FT_Outline_MoveTo_Func  FT_Outline_MoveToFunc
-
-
- -

A function pointer type used to describe the signature of a ‘move to’ function during outline walking/decomposition.

-

A ‘move to’ is emitted to start a new contour in an outline.

-

input

- - - - -
to -

A pointer to the target point of the ‘move to’.

-
user -

A typeless pointer, which is passed from the caller of the decomposition function.

-
- -

return

- -

Error code. 0 means success.

-
- -

FT_Outline_LineToFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Outline_LineToFunc)( const FT_Vector*  to,
-                            void*             user );
-
-#define FT_Outline_LineTo_Func  FT_Outline_LineToFunc
-
-
- -

A function pointer type used to describe the signature of a ‘line to’ function during outline walking/decomposition.

-

A ‘line to’ is emitted to indicate a segment in the outline.

-

input

- - - - -
to -

A pointer to the target point of the ‘line to’.

-
user -

A typeless pointer, which is passed from the caller of the decomposition function.

-
- -

return

- -

Error code. 0 means success.

-
- -

FT_Outline_ConicToFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Outline_ConicToFunc)( const FT_Vector*  control,
-                             const FT_Vector*  to,
-                             void*             user );
-
-#define FT_Outline_ConicTo_Func  FT_Outline_ConicToFunc
-
-
- -

A function pointer type used to describe the signature of a ‘conic to’ function during outline walking or decomposition.

-

A ‘conic to’ is emitted to indicate a second-order Bezier arc in the outline.

-

input

- - - - - -
control -

An intermediate control point between the last position and the new target in to.

-
to -

A pointer to the target end point of the conic arc.

-
user -

A typeless pointer, which is passed from the caller of the decomposition function.

-
- -

return

- -

Error code. 0 means success.

-
- -

FT_Outline_CubicToFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Outline_CubicToFunc)( const FT_Vector*  control1,
-                             const FT_Vector*  control2,
-                             const FT_Vector*  to,
-                             void*             user );
-
-#define FT_Outline_CubicTo_Func  FT_Outline_CubicToFunc
-
-
- -

A function pointer type used to describe the signature of a ‘cubic to’ function during outline walking or decomposition.

-

A ‘cubic to’ is emitted to indicate a third-order Bezier arc.

-

input

- - - - - - -
control1 -

A pointer to the first Bezier control point.

-
control2 -

A pointer to the second Bezier control point.

-
to -

A pointer to the target end point.

-
user -

A typeless pointer, which is passed from the caller of the decomposition function.

-
- -

return

- -

Error code. 0 means success.

-
- -

FT_Orientation

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  typedef enum  FT_Orientation_
-  {
-    FT_ORIENTATION_TRUETYPE   = 0,
-    FT_ORIENTATION_POSTSCRIPT = 1,
-    FT_ORIENTATION_FILL_RIGHT = FT_ORIENTATION_TRUETYPE,
-    FT_ORIENTATION_FILL_LEFT  = FT_ORIENTATION_POSTSCRIPT,
-    FT_ORIENTATION_NONE
-
-  } FT_Orientation;
-
-
- -

A list of values used to describe an outline's contour orientation.

-

The TrueType and PostScript specifications use different conventions to determine whether outline contours should be filled or unfilled.

-

values

- - - - - - - -
FT_ORIENTATION_TRUETYPE -

According to the TrueType specification, clockwise contours must be filled, and counter-clockwise ones must be unfilled.

-
FT_ORIENTATION_POSTSCRIPT -

According to the PostScript specification, counter-clockwise contours must be filled, and clockwise ones must be unfilled.

-
FT_ORIENTATION_FILL_RIGHT -

This is identical to FT_ORIENTATION_TRUETYPE, but is used to remember that in TrueType, everything that is to the right of the drawing direction of a contour must be filled.

-
FT_ORIENTATION_FILL_LEFT -

This is identical to FT_ORIENTATION_POSTSCRIPT, but is used to remember that in PostScript, everything that is to the left of the drawing direction of a contour must be filled.

-
FT_ORIENTATION_NONE -

The orientation cannot be determined. That is, different parts of the glyph have different orientation.

-
- -
- -

FT_Outline_Get_Orientation

-

Defined in FT_OUTLINE_H (freetype/ftoutln.h).

-
-
-  FT_EXPORT( FT_Orientation )
-  FT_Outline_Get_Orientation( FT_Outline*  outline );
-
-
- -

This function analyzes a glyph outline and tries to compute its fill orientation (see FT_Orientation). This is done by integrating the total area covered by the outline. The positive integral corresponds to the clockwise orientation and FT_ORIENTATION_POSTSCRIPT is returned. The negative integral corresponds to the counter-clockwise orientation and FT_ORIENTATION_TRUETYPE is returned.

-

Note that this will return FT_ORIENTATION_TRUETYPE for empty outlines.

-

input

- - - -
outline -

A handle to the source outline.

-
- -

return

- -

The orientation.

-
- -

FT_OUTLINE_XXX

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-#define FT_OUTLINE_NONE             0x0
-#define FT_OUTLINE_OWNER            0x1
-#define FT_OUTLINE_EVEN_ODD_FILL    0x2
-#define FT_OUTLINE_REVERSE_FILL     0x4
-#define FT_OUTLINE_IGNORE_DROPOUTS  0x8
-#define FT_OUTLINE_SMART_DROPOUTS   0x10
-#define FT_OUTLINE_INCLUDE_STUBS    0x20
-
-#define FT_OUTLINE_HIGH_PRECISION   0x100
-#define FT_OUTLINE_SINGLE_PASS      0x200
-
-
-  /* these constants are deprecated; use the corresponding */
-  /* `FT_OUTLINE_XXX` values instead                       */
-#define ft_outline_none             FT_OUTLINE_NONE
-#define ft_outline_owner            FT_OUTLINE_OWNER
-#define ft_outline_even_odd_fill    FT_OUTLINE_EVEN_ODD_FILL
-#define ft_outline_reverse_fill     FT_OUTLINE_REVERSE_FILL
-#define ft_outline_ignore_dropouts  FT_OUTLINE_IGNORE_DROPOUTS
-#define ft_outline_high_precision   FT_OUTLINE_HIGH_PRECISION
-#define ft_outline_single_pass      FT_OUTLINE_SINGLE_PASS
-
-
- -

A list of bit-field constants used for the flags in an outline's flags field.

-

values

- - - - - - - - - - - -
FT_OUTLINE_NONE -

Value 0 is reserved.

-
FT_OUTLINE_OWNER -

If set, this flag indicates that the outline's field arrays (i.e., points, flags, and contours) are ‘owned’ by the outline object, and should thus be freed when it is destroyed.

-
FT_OUTLINE_EVEN_ODD_FILL -

By default, outlines are filled using the non-zero winding rule. If set to 1, the outline will be filled using the even-odd fill rule (only works with the smooth rasterizer).

-
FT_OUTLINE_REVERSE_FILL -

By default, outside contours of an outline are oriented in clock-wise direction, as defined in the TrueType specification. This flag is set if the outline uses the opposite direction (typically for Type 1 fonts). This flag is ignored by the scan converter.

-
FT_OUTLINE_IGNORE_DROPOUTS -

By default, the scan converter will try to detect drop-outs in an outline and correct the glyph bitmap to ensure consistent shape continuity. If set, this flag hints the scan-line converter to ignore such cases. See below for more information.

-
FT_OUTLINE_SMART_DROPOUTS -

Select smart dropout control. If unset, use simple dropout control. Ignored if FT_OUTLINE_IGNORE_DROPOUTS is set. See below for more information.

-
FT_OUTLINE_INCLUDE_STUBS -

If set, turn pixels on for ‘stubs’, otherwise exclude them. Ignored if FT_OUTLINE_IGNORE_DROPOUTS is set. See below for more information.

-
FT_OUTLINE_HIGH_PRECISION -

This flag indicates that the scan-line converter should try to convert this outline to bitmaps with the highest possible quality. It is typically set for small character sizes. Note that this is only a hint that might be completely ignored by a given scan-converter.

-
FT_OUTLINE_SINGLE_PASS -

This flag is set to force a given scan-converter to only use a single pass over the outline to render a bitmap glyph image. Normally, it is set for very large character sizes. It is only a hint that might be completely ignored by a given scan-converter.

-
- -

note

- -

The flags FT_OUTLINE_IGNORE_DROPOUTS, FT_OUTLINE_SMART_DROPOUTS, and FT_OUTLINE_INCLUDE_STUBS are ignored by the smooth rasterizer.

-

There exists a second mechanism to pass the drop-out mode to the B/W rasterizer; see the tags field in FT_Outline.

-

Please refer to the description of the ‘SCANTYPE’ instruction in the OpenType specification (in file ttinst1.doc) how simple drop-outs, smart drop-outs, and stubs are defined.

-
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FreeType » Docs » Controlling FreeType Modules » Parameter Tags

-
-

Parameter Tags

-

Synopsis

-

This section contains macros for the FT_Parameter structure that are used with various functions to activate some special functionality or different behaviour of various components of FreeType.

-

FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY

-
-
-#define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY \
-          FT_MAKE_TAG( 'i', 'g', 'p', 'f' )
-
-  /* this constant is deprecated */
-#define FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \
-          FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY
-
-
- -

A tag for FT_Parameter to make FT_Open_Face ignore typographic family names in the ‘name’ table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.

-

since

- -

2.8

-
- -

FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY

-
-
-#define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY \
-          FT_MAKE_TAG( 'i', 'g', 'p', 's' )
-
-  /* this constant is deprecated */
-#define FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \
-          FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY
-
-
- -

A tag for FT_Parameter to make FT_Open_Face ignore typographic subfamily names in the ‘name’ table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.

-

since

- -

2.8

-
- -

FT_PARAM_TAG_INCREMENTAL

-
-
-#define FT_PARAM_TAG_INCREMENTAL \
-          FT_MAKE_TAG( 'i', 'n', 'c', 'r' )
-
-
- -

An FT_Parameter tag to be used with FT_Open_Face to indicate incremental glyph loading.

-
- -

FT_PARAM_TAG_LCD_FILTER_WEIGHTS

-
-
-#define FT_PARAM_TAG_LCD_FILTER_WEIGHTS \
-          FT_MAKE_TAG( 'l', 'c', 'd', 'f' )
-
-
- -

An FT_Parameter tag to be used with FT_Face_Properties. The corresponding argument specifies the five LCD filter weights for a given face (if using FT_LOAD_TARGET_LCD, for example), overriding the global default values or the values set up with FT_Library_SetLcdFilterWeights.

-

since

- -

2.8

-
- -

FT_PARAM_TAG_RANDOM_SEED

-
-
-#define FT_PARAM_TAG_RANDOM_SEED \
-          FT_MAKE_TAG( 's', 'e', 'e', 'd' )
-
-
- -

An FT_Parameter tag to be used with FT_Face_Properties. The corresponding 32bit signed integer argument overrides the font driver's random seed value with a face-specific one; see random-seed.

-

since

- -

2.8

-
- -

FT_PARAM_TAG_STEM_DARKENING

-
-
-#define FT_PARAM_TAG_STEM_DARKENING \
-          FT_MAKE_TAG( 'd', 'a', 'r', 'k' )
-
-
- -

An FT_Parameter tag to be used with FT_Face_Properties. The corresponding Boolean argument specifies whether to apply stem darkening, overriding the global default values or the values set up with FT_Property_Set (see no-stem-darkening).

-

This is a passive setting that only takes effect if the font driver or autohinter honors it, which the CFF, Type 1, and CID drivers always do, but the autohinter only in ‘light’ hinting mode (as of version 2.9).

-

since

- -

2.8

-
- -

FT_PARAM_TAG_UNPATENTED_HINTING

-
-
-#define FT_PARAM_TAG_UNPATENTED_HINTING \
-          FT_MAKE_TAG( 'u', 'n', 'p', 'a' )
-
-
- -

Deprecated, no effect.

-

Previously: A constant used as the tag of an FT_Parameter structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by FT_Open_Face.

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FreeType » Docs » Format-Specific API » PFR Fonts

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-

PFR Fonts

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Synopsis

-

This section contains the declaration of PFR-specific functions.

-

FT_Get_PFR_Metrics

-

Defined in FT_PFR_H (freetype/ftpfr.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_PFR_Metrics( FT_Face    face,
-                      FT_UInt   *aoutline_resolution,
-                      FT_UInt   *ametrics_resolution,
-                      FT_Fixed  *ametrics_x_scale,
-                      FT_Fixed  *ametrics_y_scale );
-
-
- -

Return the outline and metrics resolutions of a given PFR face.

-

input

- - - -
face -

Handle to the input face. It can be a non-PFR face.

-
- -

output

- - - - - - -
aoutline_resolution -

Outline resolution. This is equivalent to face->units_per_EM for non-PFR fonts. Optional (parameter can be NULL).

-
ametrics_resolution -

Metrics resolution. This is equivalent to outline_resolution for non-PFR fonts. Optional (parameter can be NULL).

-
ametrics_x_scale -

A 16.16 fixed-point number used to scale distance expressed in metrics units to device subpixels. This is equivalent to face->size->x_scale, but for metrics only. Optional (parameter can be NULL).

-
ametrics_y_scale -

Same as ametrics_x_scale but for the vertical direction. optional (parameter can be NULL).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If the input face is not a PFR, this function will return an error. However, in all cases, it will return valid values.

-
- -

FT_Get_PFR_Kerning

-

Defined in FT_PFR_H (freetype/ftpfr.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_PFR_Kerning( FT_Face     face,
-                      FT_UInt     left,
-                      FT_UInt     right,
-                      FT_Vector  *avector );
-
-
- -

Return the kerning pair corresponding to two glyphs in a PFR face. The distance is expressed in metrics units, unlike the result of FT_Get_Kerning.

-

input

- - - - - -
face -

A handle to the input face.

-
left -

Index of the left glyph.

-
-

Index of the right glyph.

-
- -

output

- - - -
avector -

A kerning vector.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function always return distances in original PFR metrics units. This is unlike FT_Get_Kerning with the FT_KERNING_UNSCALED mode, which always returns distances converted to outline units.

-

You can use the value of the x_scale and y_scale parameters returned by FT_Get_PFR_Metrics to scale these to device subpixels.

-
- -

FT_Get_PFR_Advance

-

Defined in FT_PFR_H (freetype/ftpfr.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_PFR_Advance( FT_Face   face,
-                      FT_UInt   gindex,
-                      FT_Pos   *aadvance );
-
-
- -

Return a given glyph advance, expressed in original metrics units, from a PFR font.

-

input

- - - - -
face -

A handle to the input face.

-
gindex -

The glyph index.

-
- -

output

- - - -
aadvance -

The glyph advance in metrics units.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You can use the x_scale or y_scale results of FT_Get_PFR_Metrics to convert the advance to device subpixels (i.e., 1/64th of pixels).

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- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-properties.html b/ThirdParty/freetype/docs/reference/site/ft2-properties.html deleted file mode 100644 index 9669647..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-properties.html +++ /dev/null @@ -1,1919 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Driver properties - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Controlling FreeType Modules » Driver properties

-
-

Driver properties

-

Synopsis

-

Driver modules can be controlled by setting and unsetting properties, using the functions FT_Property_Set and FT_Property_Get. This section documents the available properties, together with auxiliary macros and structures.

-

FT_HINTING_XXX

-

Defined in FT_DRIVER_H (freetype/ftdriver.h).

-
-
-#define FT_HINTING_FREETYPE  0
-#define FT_HINTING_ADOBE     1
-
-  /* these constants (introduced in 2.4.12) are deprecated */
-#define FT_CFF_HINTING_FREETYPE  FT_HINTING_FREETYPE
-#define FT_CFF_HINTING_ADOBE     FT_HINTING_ADOBE
-
-
- -

A list of constants used for the hinting-engine property to select the hinting engine for CFF, Type 1, and CID fonts.

-

values

- - - - -
FT_HINTING_FREETYPE -

Use the old FreeType hinting engine.

-
FT_HINTING_ADOBE -

Use the hinting engine contributed by Adobe.

-
- -

since

- -

2.9

-
- -

hinting-engine

-

Thanks to Adobe, which contributed a new hinting (and parsing) engine, an application can select between ‘freetype’ and ‘adobe’ if compiled with CFF_CONFIG_OPTION_OLD_ENGINE. If this configuration macro isn't defined, ‘hinting-engine’ does nothing.

-

The same holds for the Type 1 and CID modules if compiled with T1_CONFIG_OPTION_OLD_ENGINE.

-

For the ‘cff’ module, the default engine is ‘freetype’ if CFF_CONFIG_OPTION_OLD_ENGINE is defined, and ‘adobe’ otherwise.

-

For both the ‘type1’ and ‘t1cid’ modules, the default engine is ‘freetype’ if T1_CONFIG_OPTION_OLD_ENGINE is defined, and ‘adobe’ otherwise.

-

note

- -

This property can be used with FT_Property_Get also.

-

This property can be set via the FREETYPE_PROPERTIES environment variable (using values ‘adobe’ or ‘freetype’).

-

example

- -

The following example code demonstrates how to select Adobe's hinting engine for the ‘cff’ module (omitting the error handling). -

  FT_Library  library;
-  FT_UInt     hinting_engine = FT_HINTING_ADOBE;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "cff",
-                            "hinting-engine", &hinting_engine );
-

-

since

- -

2.4.12 (for ‘cff’ module)

-

2.9 (for ‘type1’ and ‘t1cid’ modules)

-
- -

no-stem-darkening

-

All glyphs that pass through the auto-hinter will be emboldened unless this property is set to TRUE. The same is true for the CFF, Type 1, and CID font modules if the ‘Adobe’ engine is selected (which is the default).

-

Stem darkening emboldens glyphs at smaller sizes to make them more readable on common low-DPI screens when using linear alpha blending and gamma correction, see FT_Render_Glyph. When not using linear alpha blending and gamma correction, glyphs will appear heavy and fuzzy!

-

Gamma correction essentially lightens fonts since shades of grey are shifted to higher pixel values (= higher brightness) to match the original intention to the reality of our screens. The side-effect is that glyphs ‘thin out’. Mac OS X and Adobe's proprietary font rendering library implement a counter-measure: stem darkening at smaller sizes where shades of gray dominate. By emboldening a glyph slightly in relation to its pixel size, individual pixels get higher coverage of filled-in outlines and are therefore ‘blacker’. This counteracts the ‘thinning out’ of glyphs, making text remain readable at smaller sizes.

-

By default, the Adobe engines for CFF, Type 1, and CID fonts darken stems at smaller sizes, regardless of hinting, to enhance contrast. Setting this property, stem darkening gets switched off.

-

For the auto-hinter, stem-darkening is experimental currently and thus switched off by default (this is, no-stem-darkening is set to TRUE by default). Total consistency with the CFF driver is not achieved right now because the emboldening method differs and glyphs must be scaled down on the Y-axis to keep outline points inside their precomputed blue zones. The smaller the size (especially 9ppem and down), the higher the loss of emboldening versus the CFF driver.

-

Note that stem darkening is never applied if FT_LOAD_NO_SCALE is set.

-

note

- -

This property can be used with FT_Property_Get also.

-

This property can be set via the FREETYPE_PROPERTIES environment variable (using values 1 and 0 for ‘on’ and ‘off’, respectively). It can also be set per face using FT_Face_Properties with FT_PARAM_TAG_STEM_DARKENING.

-

example

- -
  FT_Library  library;
-  FT_Bool     no_stem_darkening = TRUE;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "cff",
-                            "no-stem-darkening", &no_stem_darkening );
-
- -

since

- -

2.4.12 (for ‘cff’ module)

-

2.6.2 (for ‘autofitter’ module)

-

2.9 (for ‘type1’ and ‘t1cid’ modules)

-
- -

darkening-parameters

-

By default, the Adobe hinting engine, as used by the CFF, Type 1, and CID font drivers, darkens stems as follows (if the no-stem-darkening property isn't set): -

  stem width <= 0.5px:   darkening amount = 0.4px
-  stem width  = 1px:     darkening amount = 0.275px
-  stem width  = 1.667px: darkening amount = 0.275px
-  stem width >= 2.333px: darkening amount = 0px
-

-

and piecewise linear in-between. At configuration time, these four control points can be set with the macro CFF_CONFIG_OPTION_DARKENING_PARAMETERS; the CFF, Type 1, and CID drivers share these values. At runtime, the control points can be changed using the darkening-parameters property (see the example below that demonstrates this for the Type 1 driver).

-

The x values give the stem width, and the y values the darkening amount. The unit is 1000th of pixels. All coordinate values must be positive; the x values must be monotonically increasing; the y values must be monotonically decreasing and smaller than or equal to 500 (corresponding to half a pixel); the slope of each linear piece must be shallower than -1 (e.g., -.4).

-

The auto-hinter provides this property, too, as an experimental feature. See no-stem-darkening for more.

-

note

- -

This property can be used with FT_Property_Get also.

-

This property can be set via the FREETYPE_PROPERTIES environment variable, using eight comma-separated integers without spaces. Here the above example, using \ to break the line for readability. -

  FREETYPE_PROPERTIES=\
-  type1:darkening-parameters=500,300,1000,200,1500,100,2000,0
-

-

example

- -
  FT_Library  library;
-  FT_Int      darken_params[8] = {  500, 300,   // x1, y1
-                                   1000, 200,   // x2, y2
-                                   1500, 100,   // x3, y3
-                                   2000,   0 }; // x4, y4
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "type1",
-                            "darkening-parameters", darken_params );
-
- -

since

- -

2.5.1 (for ‘cff’ module)

-

2.6.2 (for ‘autofitter’ module)

-

2.9 (for ‘type1’ and ‘t1cid’ modules)

-
- -

random-seed

-

By default, the seed value for the CFF ‘random’ operator and the similar ‘0 28 callothersubr pop’ command for the Type 1 and CID drivers is set to a random value. However, mainly for debugging purposes, it is often necessary to use a known value as a seed so that the pseudo-random number sequences generated by ‘random’ are repeatable.

-

The random-seed property does that. Its argument is a signed 32bit integer; if the value is zero or negative, the seed given by the intitialRandomSeed private DICT operator in a CFF file gets used (or a default value if there is no such operator). If the value is positive, use it instead of initialRandomSeed, which is consequently ignored.

-

note

- -

This property can be set via the FREETYPE_PROPERTIES environment variable. It can also be set per face using FT_Face_Properties with FT_PARAM_TAG_RANDOM_SEED.

-

since

- -

2.8 (for ‘cff’ module)

-

2.9 (for ‘type1’ and ‘t1cid’ modules)

-
- -

no-long-family-names

-

If PCF_CONFIG_OPTION_LONG_FAMILY_NAMES is active while compiling FreeType, the PCF driver constructs long family names.

-

There are many PCF fonts just called ‘Fixed’ which look completely different, and which have nothing to do with each other. When selecting ‘Fixed’ in KDE or Gnome one gets results that appear rather random, the style changes often if one changes the size and one cannot select some fonts at all. The improve this situation, the PCF module prepends the foundry name (plus a space) to the family name. It also checks whether there are ‘wide’ characters; all put together, family names like ‘Sony Fixed’ or ‘Misc Fixed Wide’ are constructed.

-

If no-long-family-names is set, this feature gets switched off.

-

note

- -

This property can be used with FT_Property_Get also.

-

This property can be set via the FREETYPE_PROPERTIES environment variable (using values 1 and 0 for ‘on’ and ‘off’, respectively).

-

example

- -
  FT_Library  library;
-  FT_Bool     no_long_family_names = TRUE;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "pcf",
-                            "no-long-family-names",
-                            &no_long_family_names );
-
- -

since

- -

2.8

-
- -

TT_INTERPRETER_VERSION_XXX

-

Defined in FT_DRIVER_H (freetype/ftdriver.h).

-
-
-#define TT_INTERPRETER_VERSION_35  35
-#define TT_INTERPRETER_VERSION_38  38
-#define TT_INTERPRETER_VERSION_40  40
-
-
- -

A list of constants used for the interpreter-version property to select the hinting engine for Truetype fonts.

-

The numeric value in the constant names represents the version number as returned by the ‘GETINFO’ bytecode instruction.

-

values

- - - - - -
TT_INTERPRETER_VERSION_35 -

Version 35 corresponds to MS rasterizer v.1.7 as used e.g. in Windows 98; only grayscale and B/W rasterizing is supported.

-
TT_INTERPRETER_VERSION_38 -

Version 38 corresponds to MS rasterizer v.1.9; it is roughly equivalent to the hinting provided by DirectWrite ClearType (as can be found, for example, in the Internet Explorer 9 running on Windows 7). It is used in FreeType to select the ‘Infinality’ subpixel hinting code. The code may be removed in a future version.

-
TT_INTERPRETER_VERSION_40 -

Version 40 corresponds to MS rasterizer v.2.1; it is roughly equivalent to the hinting provided by DirectWrite ClearType (as can be found, for example, in Microsoft's Edge Browser on Windows 10). It is used in FreeType to select the ‘minimal’ subpixel hinting code, a stripped-down and higher performance version of the ‘Infinality’ code.

-
- -

note

- -

This property controls the behaviour of the bytecode interpreter and thus how outlines get hinted. It does not control how glyph get rasterized! In particular, it does not control subpixel color filtering.

-

If FreeType has not been compiled with the configuration option TT_CONFIG_OPTION_SUBPIXEL_HINTING, selecting version 38 or 40 causes an FT_Err_Unimplemented_Feature error.

-

Depending on the graphics framework, Microsoft uses different bytecode and rendering engines. As a consequence, the version numbers returned by a call to the ‘GETINFO’ bytecode instruction are more convoluted than desired.

-

Here are two tables that try to shed some light on the possible values for the MS rasterizer engine, together with the additional features introduced by it. -

  GETINFO framework               version feature
-  -------------------------------------------------------------------
-      3   GDI (Win 3.1),            v1.0  16-bit, first version
-          TrueImage
-     33   GDI (Win NT 3.1),         v1.5  32-bit
-          HP Laserjet
-     34   GDI (Win 95)              v1.6  font smoothing,
-                                          new SCANTYPE opcode
-     35   GDI (Win 98/2000)         v1.7  (UN)SCALED_COMPONENT_OFFSET
-                                            bits in composite glyphs
-     36   MGDI (Win CE 2)           v1.6+ classic ClearType
-     37   GDI (XP and later),       v1.8  ClearType
-          GDI+ old (before Vista)
-     38   GDI+ old (Vista, Win 7),  v1.9  subpixel ClearType,
-          WPF                             Y-direction ClearType,
-                                          additional error checking
-     39   DWrite (before Win 8)     v2.0  subpixel ClearType flags
-                                            in GETINFO opcode,
-                                          bug fixes
-     40   GDI+ (after Win 7),       v2.1  Y-direction ClearType flag
-          DWrite (Win 8)                    in GETINFO opcode,
-                                          Gray ClearType
-

-

The ‘version’ field gives a rough orientation only, since some applications provided certain features much earlier (as an example, Microsoft Reader used subpixel and Y-direction ClearType already in Windows 2000). Similarly, updates to a given framework might include improved hinting support. -

   version   sampling          rendering        comment
-            x        y       x           y
-  --------------------------------------------------------------
-    v1.0   normal  normal  B/W           B/W    bi-level
-    v1.6   high    high    gray          gray   grayscale
-    v1.8   high    normal  color-filter  B/W    (GDI) ClearType
-    v1.9   high    high    color-filter  gray   Color ClearType
-    v2.1   high    normal  gray          B/W    Gray ClearType
-    v2.1   high    high    gray          gray   Gray ClearType
-

-

Color and Gray ClearType are the two available variants of ‘Y-direction ClearType’, meaning grayscale rasterization along the Y-direction; the name used in the TrueType specification for this feature is ‘symmetric smoothing’. ‘Classic ClearType’ is the original algorithm used before introducing a modified version in Win XP. Another name for v1.6's grayscale rendering is ‘font smoothing’, and ‘Color ClearType’ is sometimes also called ‘DWrite ClearType’. To differentiate between today's Color ClearType and the earlier ClearType variant with B/W rendering along the vertical axis, the latter is sometimes called ‘GDI ClearType’.

-

‘Normal’ and ‘high’ sampling describe the (virtual) resolution to access the rasterized outline after the hinting process. ‘Normal’ means 1 sample per grid line (i.e., B/W). In the current Microsoft implementation, ‘high’ means an extra virtual resolution of 16x16 (or 16x1) grid lines per pixel for bytecode instructions like ‘MIRP’. After hinting, these 16 grid lines are mapped to 6x5 (or 6x1) grid lines for color filtering if Color ClearType is activated.

-

Note that ‘Gray ClearType’ is essentially the same as v1.6's grayscale rendering. However, the GETINFO instruction handles it differently: v1.6 returns bit 12 (hinting for grayscale), while v2.1 returns bits 13 (hinting for ClearType), 18 (symmetrical smoothing), and 19 (Gray ClearType). Also, this mode respects bits 2 and 3 for the version 1 gasp table exclusively (like Color ClearType), while v1.6 only respects the values of version 0 (bits 0 and 1).

-

Keep in mind that the features of the above interpreter versions might not map exactly to FreeType features or behavior because it is a fundamentally different library with different internals.

-
- -

interpreter-version

-

Currently, three versions are available, two representing the bytecode interpreter with subpixel hinting support (old ‘Infinality’ code and new stripped-down and higher performance ‘minimal’ code) and one without, respectively. The default is subpixel support if TT_CONFIG_OPTION_SUBPIXEL_HINTING is defined, and no subpixel support otherwise (since it isn't available then).

-

If subpixel hinting is on, many TrueType bytecode instructions behave differently compared to B/W or grayscale rendering (except if ‘native ClearType’ is selected by the font). Microsoft's main idea is to render at a much increased horizontal resolution, then sampling down the created output to subpixel precision. However, many older fonts are not suited to this and must be specially taken care of by applying (hardcoded) tweaks in Microsoft's interpreter.

-

Details on subpixel hinting and some of the necessary tweaks can be found in Greg Hitchcock's whitepaper at ‘https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx’. Note that FreeType currently doesn't really ‘subpixel hint’ (6x1, 6x2, or 6x5 supersampling) like discussed in the paper. Depending on the chosen interpreter, it simply ignores instructions on vertical stems to arrive at very similar results.

-

note

- -

This property can be used with FT_Property_Get also.

-

This property can be set via the FREETYPE_PROPERTIES environment variable (using values ‘35’, ‘38’, or ‘40’).

-

example

- -

The following example code demonstrates how to deactivate subpixel hinting (omitting the error handling). -

  FT_Library  library;
-  FT_Face     face;
-  FT_UInt     interpreter_version = TT_INTERPRETER_VERSION_35;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "truetype",
-                            "interpreter-version",
-                            &interpreter_version );
-

-

since

- -

2.5

-
- -

glyph-to-script-map

-

Experimental only

-

The auto-hinter provides various script modules to hint glyphs. Examples of supported scripts are Latin or CJK. Before a glyph is auto-hinted, the Unicode character map of the font gets examined, and the script is then determined based on Unicode character ranges, see below.

-

OpenType fonts, however, often provide much more glyphs than character codes (small caps, superscripts, ligatures, swashes, etc.), to be controlled by so-called ‘features’. Handling OpenType features can be quite complicated and thus needs a separate library on top of FreeType.

-

The mapping between glyph indices and scripts (in the auto-hinter sense, see the FT_AUTOHINTER_SCRIPT_XXX values) is stored as an array with num_glyphs elements, as found in the font's FT_Face structure. The glyph-to-script-map property returns a pointer to this array, which can be modified as needed. Note that the modification should happen before the first glyph gets processed by the auto-hinter so that the global analysis of the font shapes actually uses the modified mapping.

-

example

- -

The following example code demonstrates how to access it (omitting the error handling). -

  FT_Library                library;
-  FT_Face                   face;
-  FT_Prop_GlyphToScriptMap  prop;
-
-
-  FT_Init_FreeType( &library );
-  FT_New_Face( library, "foo.ttf", 0, &face );
-
-  prop.face = face;
-
-  FT_Property_Get( library, "autofitter",
-                            "glyph-to-script-map", &prop );
-
-  // adjust `prop.map' as needed right here
-
-  FT_Load_Glyph( face, ..., FT_LOAD_FORCE_AUTOHINT );
-

-

since

- -

2.4.11

-
- -

FT_AUTOHINTER_SCRIPT_XXX

-

Defined in FT_DRIVER_H (freetype/ftdriver.h).

-
-
-#define FT_AUTOHINTER_SCRIPT_NONE   0
-#define FT_AUTOHINTER_SCRIPT_LATIN  1
-#define FT_AUTOHINTER_SCRIPT_CJK    2
-#define FT_AUTOHINTER_SCRIPT_INDIC  3
-
-
- -

Experimental only

-

A list of constants used for the glyph-to-script-map property to specify the script submodule the auto-hinter should use for hinting a particular glyph.

-

values

- - - - - - -
FT_AUTOHINTER_SCRIPT_NONE -

Don't auto-hint this glyph.

-
FT_AUTOHINTER_SCRIPT_LATIN -

Apply the latin auto-hinter. For the auto-hinter, ‘latin’ is a very broad term, including Cyrillic and Greek also since characters from those scripts share the same design constraints.

-

By default, characters from the following Unicode ranges are assigned to this submodule.

-
  U+0020 - U+007F  // Basic Latin (no control characters)
-  U+00A0 - U+00FF  // Latin-1 Supplement (no control characters)
-  U+0100 - U+017F  // Latin Extended-A
-  U+0180 - U+024F  // Latin Extended-B
-  U+0250 - U+02AF  // IPA Extensions
-  U+02B0 - U+02FF  // Spacing Modifier Letters
-  U+0300 - U+036F  // Combining Diacritical Marks
-  U+0370 - U+03FF  // Greek and Coptic
-  U+0400 - U+04FF  // Cyrillic
-  U+0500 - U+052F  // Cyrillic Supplement
-  U+1D00 - U+1D7F  // Phonetic Extensions
-  U+1D80 - U+1DBF  // Phonetic Extensions Supplement
-  U+1DC0 - U+1DFF  // Combining Diacritical Marks Supplement
-  U+1E00 - U+1EFF  // Latin Extended Additional
-  U+1F00 - U+1FFF  // Greek Extended
-  U+2000 - U+206F  // General Punctuation
-  U+2070 - U+209F  // Superscripts and Subscripts
-  U+20A0 - U+20CF  // Currency Symbols
-  U+2150 - U+218F  // Number Forms
-  U+2460 - U+24FF  // Enclosed Alphanumerics
-  U+2C60 - U+2C7F  // Latin Extended-C
-  U+2DE0 - U+2DFF  // Cyrillic Extended-A
-  U+2E00 - U+2E7F  // Supplemental Punctuation
-  U+A640 - U+A69F  // Cyrillic Extended-B
-  U+A720 - U+A7FF  // Latin Extended-D
-  U+FB00 - U+FB06  // Alphab. Present. Forms (Latin Ligatures)
- U+1D400 - U+1D7FF // Mathematical Alphanumeric Symbols
- U+1F100 - U+1F1FF // Enclosed Alphanumeric Supplement
-
-
FT_AUTOHINTER_SCRIPT_CJK -

Apply the CJK auto-hinter, covering Chinese, Japanese, Korean, old Vietnamese, and some other scripts.

-

By default, characters from the following Unicode ranges are assigned to this submodule.

-
  U+1100 - U+11FF  // Hangul Jamo
-  U+2E80 - U+2EFF  // CJK Radicals Supplement
-  U+2F00 - U+2FDF  // Kangxi Radicals
-  U+2FF0 - U+2FFF  // Ideographic Description Characters
-  U+3000 - U+303F  // CJK Symbols and Punctuation
-  U+3040 - U+309F  // Hiragana
-  U+30A0 - U+30FF  // Katakana
-  U+3100 - U+312F  // Bopomofo
-  U+3130 - U+318F  // Hangul Compatibility Jamo
-  U+3190 - U+319F  // Kanbun
-  U+31A0 - U+31BF  // Bopomofo Extended
-  U+31C0 - U+31EF  // CJK Strokes
-  U+31F0 - U+31FF  // Katakana Phonetic Extensions
-  U+3200 - U+32FF  // Enclosed CJK Letters and Months
-  U+3300 - U+33FF  // CJK Compatibility
-  U+3400 - U+4DBF  // CJK Unified Ideographs Extension A
-  U+4DC0 - U+4DFF  // Yijing Hexagram Symbols
-  U+4E00 - U+9FFF  // CJK Unified Ideographs
-  U+A960 - U+A97F  // Hangul Jamo Extended-A
-  U+AC00 - U+D7AF  // Hangul Syllables
-  U+D7B0 - U+D7FF  // Hangul Jamo Extended-B
-  U+F900 - U+FAFF  // CJK Compatibility Ideographs
-  U+FE10 - U+FE1F  // Vertical forms
-  U+FE30 - U+FE4F  // CJK Compatibility Forms
-  U+FF00 - U+FFEF  // Halfwidth and Fullwidth Forms
- U+1B000 - U+1B0FF // Kana Supplement
- U+1D300 - U+1D35F // Tai Xuan Hing Symbols
- U+1F200 - U+1F2FF // Enclosed Ideographic Supplement
- U+20000 - U+2A6DF // CJK Unified Ideographs Extension B
- U+2A700 - U+2B73F // CJK Unified Ideographs Extension C
- U+2B740 - U+2B81F // CJK Unified Ideographs Extension D
- U+2F800 - U+2FA1F // CJK Compatibility Ideographs Supplement
-
-
FT_AUTOHINTER_SCRIPT_INDIC -

Apply the indic auto-hinter, covering all major scripts from the Indian sub-continent and some other related scripts like Thai, Lao, or Tibetan.

-

By default, characters from the following Unicode ranges are assigned to this submodule.

-
  U+0900 - U+0DFF  // Indic Range
-  U+0F00 - U+0FFF  // Tibetan
-  U+1900 - U+194F  // Limbu
-  U+1B80 - U+1BBF  // Sundanese
-  U+A800 - U+A82F  // Syloti Nagri
-  U+ABC0 - U+ABFF  // Meetei Mayek
- U+11800 - U+118DF // Sharada
-
-

Note that currently Indic support is rudimentary only, missing blue zone support.

-
- -

since

- -

2.4.11

-
- -

FT_Prop_GlyphToScriptMap

-

Defined in FT_DRIVER_H (freetype/ftdriver.h).

-
-
-  typedef struct  FT_Prop_GlyphToScriptMap_
-  {
-    FT_Face     face;
-    FT_UShort*  map;
-
-  } FT_Prop_GlyphToScriptMap;
-
-
- -

Experimental only

-

The data exchange structure for the glyph-to-script-map property.

-

since

- -

2.4.11

-
- -

fallback-script

-

Experimental only

-

If no auto-hinter script module can be assigned to a glyph, a fallback script gets assigned to it (see also the glyph-to-script-map property). By default, this is FT_AUTOHINTER_SCRIPT_CJK. Using the fallback-script property, this fallback value can be changed.

-

note

- -

This property can be used with FT_Property_Get also.

-

It's important to use the right timing for changing this value: The creation of the glyph-to-script map that eventually uses the fallback script value gets triggered either by setting or reading a face-specific property like glyph-to-script-map, or by auto-hinting any glyph from that face. In particular, if you have already created an FT_Face structure but not loaded any glyph (using the auto-hinter), a change of the fallback script will affect this face.

-

example

- -
  FT_Library  library;
-  FT_UInt     fallback_script = FT_AUTOHINTER_SCRIPT_NONE;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "autofitter",
-                            "fallback-script", &fallback_script );
-
- -

since

- -

2.4.11

-
- -

default-script

-

Experimental only

-

If FreeType gets compiled with FT_CONFIG_OPTION_USE_HARFBUZZ to make the HarfBuzz library access OpenType features for getting better glyph coverages, this property sets the (auto-fitter) script to be used for the default (OpenType) script data of a font's GSUB table. Features for the default script are intended for all scripts not explicitly handled in GSUB; an example is a ‘dlig’ feature, containing the combination of the characters ‘T’, ‘E’, and ‘L’ to form a ‘TEL’ ligature.

-

By default, this is FT_AUTOHINTER_SCRIPT_LATIN. Using the default-script property, this default value can be changed.

-

note

- -

This property can be used with FT_Property_Get also.

-

It's important to use the right timing for changing this value: The creation of the glyph-to-script map that eventually uses the default script value gets triggered either by setting or reading a face-specific property like glyph-to-script-map, or by auto-hinting any glyph from that face. In particular, if you have already created an FT_Face structure but not loaded any glyph (using the auto-hinter), a change of the default script will affect this face.

-

example

- -
  FT_Library  library;
-  FT_UInt     default_script = FT_AUTOHINTER_SCRIPT_NONE;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "autofitter",
-                            "default-script", &default_script );
-
- -

since

- -

2.5.3

-
- -

increase-x-height

-

For ppem values in the range 6 <= ppem <= increase-x-height, round up the font's x height much more often than normally. If the value is set to 0, which is the default, this feature is switched off. Use this property to improve the legibility of small font sizes if necessary.

-

note

- -

This property can be used with FT_Property_Get also.

-

Set this value right after calling FT_Set_Char_Size, but before loading any glyph (using the auto-hinter).

-

example

- -
  FT_Library               library;
-  FT_Face                  face;
-  FT_Prop_IncreaseXHeight  prop;
-
-
-  FT_Init_FreeType( &library );
-  FT_New_Face( library, "foo.ttf", 0, &face );
-  FT_Set_Char_Size( face, 10 * 64, 0, 72, 0 );
-
-  prop.face  = face;
-  prop.limit = 14;
-
-  FT_Property_Set( library, "autofitter",
-                            "increase-x-height", &prop );
-
- -

since

- -

2.4.11

-
- -

FT_Prop_IncreaseXHeight

-

Defined in FT_DRIVER_H (freetype/ftdriver.h).

-
-
-  typedef struct  FT_Prop_IncreaseXHeight_
-  {
-    FT_Face  face;
-    FT_UInt  limit;
-
-  } FT_Prop_IncreaseXHeight;
-
-
- -

The data exchange structure for the increase-x-height property.

-
- -

warping

-

Experimental only

-

If FreeType gets compiled with option AF_CONFIG_OPTION_USE_WARPER to activate the warp hinting code in the auto-hinter, this property switches warping on and off.

-

Warping only works in ‘normal’ auto-hinting mode replacing it. The idea of the code is to slightly scale and shift a glyph along the non-hinted dimension (which is usually the horizontal axis) so that as much of its segments are aligned (more or less) to the grid. To find out a glyph's optimal scaling and shifting value, various parameter combinations are tried and scored.

-

By default, warping is off.

-

note

- -

This property can be used with FT_Property_Get also.

-

This property can be set via the FREETYPE_PROPERTIES environment variable (using values 1 and 0 for ‘on’ and ‘off’, respectively).

-

The warping code can also change advance widths. Have a look at the lsb_delta and rsb_delta fields in the FT_GlyphSlotRec structure for details on improving inter-glyph distances while rendering.

-

Since warping is a global property of the auto-hinter it is best to change its value before rendering any face. Otherwise, you should reload all faces that get auto-hinted in ‘normal’ hinting mode.

-

example

- -

This example shows how to switch on warping (omitting the error handling). -

  FT_Library  library;
-  FT_Bool     warping = 1;
-
-
-  FT_Init_FreeType( &library );
-
-  FT_Property_Set( library, "autofitter", "warping", &warping );
-

-

since

- -

2.6

-
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FreeType » Docs » Support API » Quick retrieval of advance values

-
-

Quick retrieval of advance values

-

Synopsis

-

This section contains functions to quickly extract advance values without handling glyph outlines, if possible.

-

FT_Get_Advance

-

Defined in FT_ADVANCES_H (freetype/ftadvanc.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Advance( FT_Face    face,
-                  FT_UInt    gindex,
-                  FT_Int32   load_flags,
-                  FT_Fixed  *padvance );
-
-
- -

Retrieve the advance value of a given glyph outline in an FT_Face.

-

input

- - - - - -
face -

The source FT_Face handle.

-
gindex -

The glyph index.

-
load_flags -

A set of bit flags similar to those used when calling FT_Load_Glyph, used to determine what kind of advances you need.

-
- -

output

- - - -
padvance -

The advance value. If scaling is performed (based on the value of load_flags), the advance value is in 16.16 format. Otherwise, it is in font units.

-

If FT_LOAD_VERTICAL_LAYOUT is set, this is the vertical advance corresponding to a vertical layout. Otherwise, it is the horizontal advance in a horizontal layout.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function may fail if you use FT_ADVANCE_FLAG_FAST_ONLY and if the corresponding font backend doesn't have a quick way to retrieve the advances.

-

A scaled advance is returned in 16.16 format but isn't transformed by the affine transformation specified by FT_Set_Transform.

-
- -

FT_Get_Advances

-

Defined in FT_ADVANCES_H (freetype/ftadvanc.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Advances( FT_Face    face,
-                   FT_UInt    start,
-                   FT_UInt    count,
-                   FT_Int32   load_flags,
-                   FT_Fixed  *padvances );
-
-
- -

Retrieve the advance values of several glyph outlines in an FT_Face.

-

input

- - - - - - -
face -

The source FT_Face handle.

-
start -

The first glyph index.

-
count -

The number of advance values you want to retrieve.

-
load_flags -

A set of bit flags similar to those used when calling FT_Load_Glyph.

-
- -

output

- - - -
padvance -

The advance values. This array, to be provided by the caller, must contain at least count elements.

-

If scaling is performed (based on the value of load_flags), the advance values are in 16.16 format. Otherwise, they are in font units.

-

If FT_LOAD_VERTICAL_LAYOUT is set, these are the vertical advances corresponding to a vertical layout. Otherwise, they are the horizontal advances in a horizontal layout.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

This function may fail if you use FT_ADVANCE_FLAG_FAST_ONLY and if the corresponding font backend doesn't have a quick way to retrieve the advances.

-

Scaled advances are returned in 16.16 format but aren't transformed by the affine transformation specified by FT_Set_Transform.

-
- -

FT_ADVANCE_FLAG_FAST_ONLY

-

Defined in FT_ADVANCES_H (freetype/ftadvanc.h).

-
-
-#define FT_ADVANCE_FLAG_FAST_ONLY  0x20000000L
-
-
- -

A bit-flag to be OR-ed with the flags parameter of the FT_Get_Advance and FT_Get_Advances functions.

-

If set, it indicates that you want these functions to fail if the corresponding hinting mode or font driver doesn't allow for very quick advance computation.

-

Typically, glyphs that are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly.

-

Normal and bytecode hinted modes that require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.

-
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-
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FreeType » Docs » Support API » Scanline Converter

-
-

Scanline Converter

-

Synopsis

-

This section contains technical definitions.

-

FT_Raster

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct FT_RasterRec_*  FT_Raster;
-
-
- -

An opaque handle (pointer) to a raster object. Each object can be used independently to convert an outline into a bitmap or pixmap.

-
- -

FT_Span

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Span_
-  {
-    short           x;
-    unsigned short  len;
-    unsigned char   coverage;
-
-  } FT_Span;
-
-
- -

A structure used to model a single span of gray pixels when rendering an anti-aliased bitmap.

-

fields

- - - - - -
x -

The span's horizontal start position.

-
len -

The span's length in pixels.

-
coverage -

The span color/coverage, ranging from 0 (background) to 255 (foreground).

-
- -

note

- -

This structure is used by the span drawing callback type named FT_SpanFunc that takes the y coordinate of the span as a parameter.

-

The coverage value is always between 0 and 255. If you want less gray values, the callback function has to reduce them.

-
- -

FT_SpanFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef void
-  (*FT_SpanFunc)( int             y,
-                  int             count,
-                  const FT_Span*  spans,
-                  void*           user );
-
-#define FT_Raster_Span_Func  FT_SpanFunc
-
-
- -

A function used as a call-back by the anti-aliased renderer in order to let client applications draw themselves the gray pixel spans on each scan line.

-

input

- - - - - - -
y -

The scanline's y coordinate.

-
count -

The number of spans to draw on this scanline.

-
spans -

A table of count spans to draw on the scanline.

-
user -

User-supplied data that is passed to the callback.

-
- -

note

- -

This callback allows client applications to directly render the gray spans of the anti-aliased bitmap to any kind of surfaces.

-

This can be used to write anti-aliased outlines directly to a given background bitmap, and even perform translucency.

-
- -

FT_Raster_Params

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Raster_Params_
-  {
-    const FT_Bitmap*        target;
-    const void*             source;
-    int                     flags;
-    FT_SpanFunc             gray_spans;
-    FT_SpanFunc             black_spans;  /* unused */
-    FT_Raster_BitTest_Func  bit_test;     /* unused */
-    FT_Raster_BitSet_Func   bit_set;      /* unused */
-    void*                   user;
-    FT_BBox                 clip_box;
-
-  } FT_Raster_Params;
-
-
- -

A structure to hold the arguments used by a raster's render function.

-

fields

- - - - - - - - - - - -
target -

The target bitmap.

-
source -

A pointer to the source glyph image (e.g., an FT_Outline).

-
flags -

The rendering flags.

-
gray_spans -

The gray span drawing callback.

-
black_spans -

Unused.

-
bit_test -

Unused.

-
bit_set -

Unused.

-
user -

User-supplied data that is passed to each drawing callback.

-
clip_box -

An optional clipping box. It is only used in direct rendering mode. Note that coordinates here should be expressed in integer pixels (and not in 26.6 fixed-point units).

-
- -

note

- -

An anti-aliased glyph bitmap is drawn if the FT_RASTER_FLAG_AA bit flag is set in the flags field, otherwise a monochrome bitmap is generated.

-

If the FT_RASTER_FLAG_DIRECT bit flag is set in flags, the raster will call the gray_spans callback to draw gray pixel spans. This allows direct composition over a pre-existing bitmap through user-provided callbacks to perform the span drawing and composition. Not supported by the monochrome rasterizer.

-
- -

FT_RASTER_FLAG_XXX

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-#define FT_RASTER_FLAG_DEFAULT  0x0
-#define FT_RASTER_FLAG_AA       0x1
-#define FT_RASTER_FLAG_DIRECT   0x2
-#define FT_RASTER_FLAG_CLIP     0x4
-
-  /* these constants are deprecated; use the corresponding */
-  /* `FT_RASTER_FLAG_XXX` values instead                   */
-#define ft_raster_flag_default  FT_RASTER_FLAG_DEFAULT
-#define ft_raster_flag_aa       FT_RASTER_FLAG_AA
-#define ft_raster_flag_direct   FT_RASTER_FLAG_DIRECT
-#define ft_raster_flag_clip     FT_RASTER_FLAG_CLIP
-
-
- -

A list of bit flag constants as used in the flags field of a FT_Raster_Params structure.

-

values

- - - - - - -
FT_RASTER_FLAG_DEFAULT -

This value is 0.

-
FT_RASTER_FLAG_AA -

This flag is set to indicate that an anti-aliased glyph image should be generated. Otherwise, it will be monochrome (1-bit).

-
FT_RASTER_FLAG_DIRECT -

This flag is set to indicate direct rendering. In this mode, client applications must provide their own span callback. This lets them directly draw or compose over an existing bitmap. If this bit is not set, the target pixmap's buffer must be zeroed before rendering.

-

Direct rendering is only possible with anti-aliased glyphs.

-
FT_RASTER_FLAG_CLIP -

This flag is only used in direct rendering mode. If set, the output will be clipped to a box specified in the clip_box field of the FT_Raster_Params structure.

-

Note that by default, the glyph bitmap is clipped to the target pixmap, except in direct rendering mode where all spans are generated if no clipping box is set.

-
- -
- -

FT_Raster_NewFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Raster_NewFunc)( void*       memory,
-                        FT_Raster*  raster );
-
-#define FT_Raster_New_Func  FT_Raster_NewFunc
-
-
- -

A function used to create a new raster object.

-

input

- - - -
memory -

A handle to the memory allocator.

-
- -

output

- - - -
raster -

A handle to the new raster object.

-
- -

return

- -

Error code. 0 means success.

-

note

- -

The memory parameter is a typeless pointer in order to avoid un-wanted dependencies on the rest of the FreeType code. In practice, it is an FT_Memory object, i.e., a handle to the standard FreeType memory allocator. However, this field can be completely ignored by a given raster implementation.

-
- -

FT_Raster_DoneFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef void
-  (*FT_Raster_DoneFunc)( FT_Raster  raster );
-
-#define FT_Raster_Done_Func  FT_Raster_DoneFunc
-
-
- -

A function used to destroy a given raster object.

-

input

- - - -
raster -

A handle to the raster object.

-
- -
- -

FT_Raster_ResetFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef void
-  (*FT_Raster_ResetFunc)( FT_Raster       raster,
-                          unsigned char*  pool_base,
-                          unsigned long   pool_size );
-
-#define FT_Raster_Reset_Func  FT_Raster_ResetFunc
-
-
- -

FreeType used to provide an area of memory called the ‘render pool’ available to all registered rasterizers. This was not thread safe, however, and now FreeType never allocates this pool.

-

This function is called after a new raster object is created.

-

input

- - - - - -
raster -

A handle to the new raster object.

-
pool_base -

Previously, the address in memory of the render pool. Set this to NULL.

-
pool_size -

Previously, the size in bytes of the render pool. Set this to 0.

-
- -

note

- -

Rasterizers should rely on dynamic or stack allocation if they want to (a handle to the memory allocator is passed to the rasterizer constructor).

-
- -

FT_Raster_SetModeFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Raster_SetModeFunc)( FT_Raster      raster,
-                            unsigned long  mode,
-                            void*          args );
-
-#define FT_Raster_Set_Mode_Func  FT_Raster_SetModeFunc
-
-
- -

This function is a generic facility to change modes or attributes in a given raster. This can be used for debugging purposes, or simply to allow implementation-specific ‘features’ in a given raster module.

-

input

- - - - - -
raster -

A handle to the new raster object.

-
mode -

A 4-byte tag used to name the mode or property.

-
args -

A pointer to the new mode/property to use.

-
- -
- -

FT_Raster_RenderFunc

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Raster_RenderFunc)( FT_Raster                raster,
-                           const FT_Raster_Params*  params );
-
-#define FT_Raster_Render_Func  FT_Raster_RenderFunc
-
-
- -

Invoke a given raster to scan-convert a given glyph image into a target bitmap.

-

input

- - - - -
raster -

A handle to the raster object.

-
params -

A pointer to an FT_Raster_Params structure used to store the rendering parameters.

-
- -

return

- -

Error code. 0 means success.

-

note

- -

The exact format of the source image depends on the raster's glyph format defined in its FT_Raster_Funcs structure. It can be an FT_Outline or anything else in order to support a large array of glyph formats.

-

Note also that the render function can fail and return a FT_Err_Unimplemented_Feature error code if the raster used does not support direct composition.

-
- -

FT_Raster_Funcs

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef struct  FT_Raster_Funcs_
-  {
-    FT_Glyph_Format        glyph_format;
-
-    FT_Raster_NewFunc      raster_new;
-    FT_Raster_ResetFunc    raster_reset;
-    FT_Raster_SetModeFunc  raster_set_mode;
-    FT_Raster_RenderFunc   raster_render;
-    FT_Raster_DoneFunc     raster_done;
-
-  } FT_Raster_Funcs;
-
-
- -

A structure used to describe a given raster class to the library.

-

fields

- - - - - - - -
glyph_format -

The supported glyph format for this raster.

-
raster_new -

The raster constructor.

-
raster_reset -

Used to reset the render pool within the raster.

-
raster_render -

A function to render a glyph into a given bitmap.

-
raster_done -

The raster destructor.

-
- -
- -

FT_Raster_BitTest_Func

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef int
-  (*FT_Raster_BitTest_Func)( int    y,
-                             int    x,
-                             void*  user );
-
-
- -

Deprecated, unimplemented.

-
- -

FT_Raster_BitSet_Func

-

Defined in FT_IMAGE_H (freetype/ftimage.h).

-
-
-  typedef void
-  (*FT_Raster_BitSet_Func)( int    y,
-                            int    x,
-                            void*  user );
-
-
- -

Deprecated, unimplemented.

-
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FreeType » Docs » Format-Specific API » SFNT Names

-
-

SFNT Names

-

Synopsis

-

The TrueType and OpenType specifications allow the inclusion of a special names table (‘name’) in font files. This table contains textual (and internationalized) information regarding the font, like family name, copyright, version, etc.

-

The definitions below are used to access them if available.

-

Note that this has nothing to do with glyph names!

-

FT_SfntName

-

Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).

-
-
-  typedef struct  FT_SfntName_
-  {
-    FT_UShort  platform_id;
-    FT_UShort  encoding_id;
-    FT_UShort  language_id;
-    FT_UShort  name_id;
-
-    FT_Byte*   string;      /* this string is *not* null-terminated! */
-    FT_UInt    string_len;  /* in bytes                              */
-
-  } FT_SfntName;
-
-
- -

A structure used to model an SFNT ‘name’ table entry.

-

fields

- - - - - - - - -
platform_id -

The platform ID for string. See TT_PLATFORM_XXX for possible values.

-
encoding_id -

The encoding ID for string. See TT_APPLE_ID_XXX, TT_MAC_ID_XXX, TT_ISO_ID_XXX, TT_MS_ID_XXX, and TT_ADOBE_ID_XXX for possible values.

-
language_id -

The language ID for string. See TT_MAC_LANGID_XXX and TT_MS_LANGID_XXX for possible values.

-

Registered OpenType values for language_id are always smaller than 0x8000; values equal or larger than 0x8000 usually indicate a language tag string (introduced in OpenType version 1.6). Use function FT_Get_Sfnt_LangTag with language_id as its argument to retrieve the associated language tag.

-
name_id -

An identifier for string. See TT_NAME_ID_XXX for possible values.

-
string -

The ‘name’ string. Note that its format differs depending on the (platform,encoding) pair, being either a string of bytes (without a terminating NULL byte) or containing UTF-16BE entities.

-
string_len -

The length of string in bytes.

-
- -

note

- -

Please refer to the TrueType or OpenType specification for more details.

-
- -

FT_Get_Sfnt_Name_Count

-

Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).

-
-
-  FT_EXPORT( FT_UInt )
-  FT_Get_Sfnt_Name_Count( FT_Face  face );
-
-
- -

Retrieve the number of name strings in the SFNT ‘name’ table.

-

input

- - - -
face -

A handle to the source face.

-
- -

return

- -

The number of strings in the ‘name’ table.

-

note

- -

This function always returns an error if the config macro TT_CONFIG_OPTION_SFNT_NAMES is not defined in ftoption.h.

-
- -

FT_Get_Sfnt_Name

-

Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Sfnt_Name( FT_Face       face,
-                    FT_UInt       idx,
-                    FT_SfntName  *aname );
-
-
- -

Retrieve a string of the SFNT ‘name’ table for a given index.

-

input

- - - - -
face -

A handle to the source face.

-
idx -

The index of the ‘name’ string.

-
- -

output

- - - -
aname -

The indexed FT_SfntName structure.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The string array returned in the aname structure is not null-terminated. Note that you don't have to deallocate string by yourself; FreeType takes care of it if you call FT_Done_Face.

-

Use FT_Get_Sfnt_Name_Count to get the total number of available ‘name’ table entries, then do a loop until you get the right platform, encoding, and name ID.

-

‘name’ table format 1 entries can use language tags also, see FT_Get_Sfnt_LangTag.

-

This function always returns an error if the config macro TT_CONFIG_OPTION_SFNT_NAMES is not defined in ftoption.h.

-
- -

FT_SfntLangTag

-

Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).

-
-
-  typedef struct  FT_SfntLangTag_
-  {
-    FT_Byte*  string;      /* this string is *not* null-terminated! */
-    FT_UInt   string_len;  /* in bytes                              */
-
-  } FT_SfntLangTag;
-
-
- -

A structure to model a language tag entry from an SFNT ‘name’ table.

-

fields

- - - - -
string -

The language tag string, encoded in UTF-16BE (without trailing NULL bytes).

-
string_len -

The length of string in bytes.

-
- -

note

- -

Please refer to the TrueType or OpenType specification for more details.

-

since

- -

2.8

-
- -

FT_Get_Sfnt_LangTag

-

Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Get_Sfnt_LangTag( FT_Face          face,
-                       FT_UInt          langID,
-                       FT_SfntLangTag  *alangTag );
-
-
- -

Retrieve the language tag associated with a language ID of an SFNT ‘name’ table entry.

-

input

- - - - -
face -

A handle to the source face.

-
langID -

The language ID, as returned by FT_Get_Sfnt_Name. This is always a value larger than 0x8000.

-
- -

output

- - - -
alangTag -

The language tag associated with the ‘name’ table entry's language ID.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The string array returned in the alangTag structure is not null-terminated. Note that you don't have to deallocate string by yourself; FreeType takes care of it if you call FT_Done_Face.

-

Only ‘name’ table format 1 supports language tags. For format 0 tables, this function always returns FT_Err_Invalid_Table. For invalid format 1 language ID values, FT_Err_Invalid_Argument is returned.

-

This function always returns an error if the config macro TT_CONFIG_OPTION_SFNT_NAMES is not defined in ftoption.h.

-

since

- -

2.8

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FreeType » Docs » Core API » Size Management

-
-

Size Management

-

Synopsis

-

When creating a new face object (e.g., with FT_New_Face), an FT_Size object is automatically created and used to store all pixel-size dependent information, available in the face->size field.

-

It is however possible to create more sizes for a given face, mostly in order to manage several character pixel sizes of the same font family and style. See FT_New_Size and FT_Done_Size.

-

Note that FT_Set_Pixel_Sizes and FT_Set_Char_Size only modify the contents of the current ‘active’ size; you thus need to use FT_Activate_Size to change it.

-

99% of applications won't need the functions provided here, especially if they use the caching sub-system, so be cautious when using these.

-

FT_New_Size

-

Defined in FT_SIZES_H (freetype/ftsizes.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_New_Size( FT_Face   face,
-               FT_Size*  size );
-
-
- -

Create a new size object from a given face object.

-

input

- - - -
face -

A handle to a parent face object.

-
- -

output

- - - -
asize -

A handle to a new size object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

You need to call FT_Activate_Size in order to select the new size for upcoming calls to FT_Set_Pixel_Sizes, FT_Set_Char_Size, FT_Load_Glyph, FT_Load_Char, etc.

-
- -

FT_Done_Size

-

Defined in FT_SIZES_H (freetype/ftsizes.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Done_Size( FT_Size  size );
-
-
- -

Discard a given size object. Note that FT_Done_Face automatically discards all size objects allocated with FT_New_Size.

-

input

- - - -
size -

A handle to a target size object.

-
- -

return

- -

FreeType error code. 0 means success.

-
- -

FT_Activate_Size

-

Defined in FT_SIZES_H (freetype/ftsizes.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Activate_Size( FT_Size  size );
-
-
- -

Even though it is possible to create several size objects for a given face (see FT_New_Size for details), functions like FT_Load_Glyph or FT_Load_Char only use the one that has been activated last to determine the ‘current character pixel size’.

-

This function can be used to ‘activate’ a previously created size object.

-

input

- - - -
size -

A handle to a target size object.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If face is the size's parent face object, this function changes the value of face->size to the input size handle.

-
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FreeType » Docs » Support API » System Interface

-
-

System Interface

-

Synopsis

-

This section contains various definitions related to memory management and i/o access. You need to understand this information if you want to use a custom memory manager or you own i/o streams.

-

FT_Memory

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef struct FT_MemoryRec_*  FT_Memory;
-
-
- -

A handle to a given memory manager object, defined with an FT_MemoryRec structure.

-
- -

FT_Alloc_Func

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef void*
-  (*FT_Alloc_Func)( FT_Memory  memory,
-                    long       size );
-
-
- -

A function used to allocate size bytes from memory.

-

input

- - - - -
memory -

A handle to the source memory manager.

-
size -

The size in bytes to allocate.

-
- -

return

- -

Address of new memory block. 0 in case of failure.

-
- -

FT_Free_Func

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef void
-  (*FT_Free_Func)( FT_Memory  memory,
-                   void*      block );
-
-
- -

A function used to release a given block of memory.

-

input

- - - - -
memory -

A handle to the source memory manager.

-
block -

The address of the target memory block.

-
- -
- -

FT_Realloc_Func

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef void*
-  (*FT_Realloc_Func)( FT_Memory  memory,
-                      long       cur_size,
-                      long       new_size,
-                      void*      block );
-
-
- -

A function used to re-allocate a given block of memory.

-

input

- - - - - - -
memory -

A handle to the source memory manager.

-
cur_size -

The block's current size in bytes.

-
new_size -

The block's requested new size.

-
block -

The block's current address.

-
- -

return

- -

New block address. 0 in case of memory shortage.

-

note

- -

In case of error, the old block must still be available.

-
- -

FT_MemoryRec

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  struct  FT_MemoryRec_
-  {
-    void*            user;
-    FT_Alloc_Func    alloc;
-    FT_Free_Func     free;
-    FT_Realloc_Func  realloc;
-  };
-
-
- -

A structure used to describe a given memory manager to FreeType 2.

-

fields

- - - - - - -
user -

A generic typeless pointer for user data.

-
alloc -

A pointer type to an allocation function.

-
free -

A pointer type to an memory freeing function.

-
realloc -

A pointer type to a reallocation function.

-
- -
- -

FT_Stream

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef struct FT_StreamRec_*  FT_Stream;
-
-
- -

A handle to an input stream.

-

also

- -

See FT_StreamRec for the publicly accessible fields of a given stream object.

-
- -

FT_StreamDesc

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef union  FT_StreamDesc_
-  {
-    long   value;
-    void*  pointer;
-
-  } FT_StreamDesc;
-
-
- -

A union type used to store either a long or a pointer. This is used to store a file descriptor or a FILE* in an input stream.

-
- -

FT_Stream_IoFunc

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef unsigned long
-  (*FT_Stream_IoFunc)( FT_Stream       stream,
-                       unsigned long   offset,
-                       unsigned char*  buffer,
-                       unsigned long   count );
-
-
- -

A function used to seek and read data from a given input stream.

-

input

- - - - - - -
stream -

A handle to the source stream.

-
offset -

The offset of read in stream (always from start).

-
buffer -

The address of the read buffer.

-
count -

The number of bytes to read from the stream.

-
- -

return

- -

The number of bytes effectively read by the stream.

-

note

- -

This function might be called to perform a seek or skip operation with a count of 0. A non-zero return value then indicates an error.

-
- -

FT_Stream_CloseFunc

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef void
-  (*FT_Stream_CloseFunc)( FT_Stream  stream );
-
-
- -

A function used to close a given input stream.

-

input

- - - -
stream -

A handle to the target stream.

-
- -
- -

FT_StreamRec

-

Defined in FT_SYSTEM_H (freetype/ftsystem.h).

-
-
-  typedef struct  FT_StreamRec_
-  {
-    unsigned char*       base;
-    unsigned long        size;
-    unsigned long        pos;
-
-    FT_StreamDesc        descriptor;
-    FT_StreamDesc        pathname;
-    FT_Stream_IoFunc     read;
-    FT_Stream_CloseFunc  close;
-
-    FT_Memory            memory;
-    unsigned char*       cursor;
-    unsigned char*       limit;
-
-  } FT_StreamRec;
-
-
- -

A structure used to describe an input stream.

-

input

- - - - - - - - - - - - -
base -

For memory-based streams, this is the address of the first stream byte in memory. This field should always be set to NULL for disk-based streams.

-
size -

The stream size in bytes.

-

In case of compressed streams where the size is unknown before actually doing the decompression, the value is set to 0x7FFFFFFF. (Note that this size value can occur for normal streams also; it is thus just a hint.)

-
pos -

The current position within the stream.

-
descriptor -

This field is a union that can hold an integer or a pointer. It is used by stream implementations to store file descriptors or FILE* pointers.

-
pathname -

This field is completely ignored by FreeType. However, it is often useful during debugging to use it to store the stream's filename (where available).

-
read -

The stream's input function.

-
close -

The stream's close function.

-
memory -

The memory manager to use to preload frames. This is set internally by FreeType and shouldn't be touched by stream implementations.

-
cursor -

This field is set and used internally by FreeType when parsing frames. In particular, the FT_GET_XXX macros use this instead of the pos field.

-
limit -

This field is set and used internally by FreeType when parsing frames.

-
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FreeType » Docs » Controlling FreeType Modules » The Type 1 and CID drivers

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-

The Type 1 and CID drivers

-

Synopsis

-

It is possible to control the behaviour of FreeType's Type 1 and Type 1 CID drivers with FT_Property_Set and FT_Property_Get.

-

Behind the scenes, both drivers use the Adobe CFF engine for hinting; however, the used properties must be specified separately.

-

The Type 1 driver's module name is ‘type1’; the CID driver's module name is ‘t1cid’.

-

Available properties are hinting-engine, no-stem-darkening, darkening-parameters, and random-seed, as documented in the ‘Driver properties’ section.

-

Please see the ‘The CFF driver’ section for more details on the new hinting engine.

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FreeType » Docs » Miscellaneous » The TrueType Engine

-
-

The TrueType Engine

-

Synopsis

-

This section contains a function used to query the level of TrueType bytecode support compiled in this version of the library.

-

FT_TrueTypeEngineType

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  typedef enum  FT_TrueTypeEngineType_
-  {
-    FT_TRUETYPE_ENGINE_TYPE_NONE = 0,
-    FT_TRUETYPE_ENGINE_TYPE_UNPATENTED,
-    FT_TRUETYPE_ENGINE_TYPE_PATENTED
-
-  } FT_TrueTypeEngineType;
-
-
- -

A list of values describing which kind of TrueType bytecode engine is implemented in a given FT_Library instance. It is used by the FT_Get_TrueType_Engine_Type function.

-

values

- - - - - -
FT_TRUETYPE_ENGINE_TYPE_NONE -

The library doesn't implement any kind of bytecode interpreter.

-
FT_TRUETYPE_ENGINE_TYPE_UNPATENTED -

Deprecated and removed.

-
FT_TRUETYPE_ENGINE_TYPE_PATENTED -

The library implements a bytecode interpreter that covers the full instruction set of the TrueType virtual machine (this was governed by patents until May 2010, hence the name).

-
- -

since

- -

2.2

-
- -

FT_Get_TrueType_Engine_Type

-

Defined in FT_MODULE_H (freetype/ftmodapi.h).

-
-
-  FT_EXPORT( FT_TrueTypeEngineType )
-  FT_Get_TrueType_Engine_Type( FT_Library  library );
-
-
- -

Return an FT_TrueTypeEngineType value to indicate which level of the TrueType virtual machine a given library instance supports.

-

input

- - - -
library -

A library instance.

-
- -

return

- -

A value indicating which level is supported.

-

since

- -

2.2

-
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FreeType » Docs » Format-Specific API » TrueType Tables

-
-

TrueType Tables

-

Synopsis

-

This section contains definitions of some basic tables specific to TrueType and OpenType as well as some routines used to access and process them.

-

TT_Header

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_Header_
-  {
-    FT_Fixed   Table_Version;
-    FT_Fixed   Font_Revision;
-
-    FT_Long    CheckSum_Adjust;
-    FT_Long    Magic_Number;
-
-    FT_UShort  Flags;
-    FT_UShort  Units_Per_EM;
-
-    FT_ULong   Created [2];
-    FT_ULong   Modified[2];
-
-    FT_Short   xMin;
-    FT_Short   yMin;
-    FT_Short   xMax;
-    FT_Short   yMax;
-
-    FT_UShort  Mac_Style;
-    FT_UShort  Lowest_Rec_PPEM;
-
-    FT_Short   Font_Direction;
-    FT_Short   Index_To_Loc_Format;
-    FT_Short   Glyph_Data_Format;
-
-  } TT_Header;
-
-
- -

A structure to model a TrueType font header table. All fields follow the OpenType specification. The 64-bit timestamps are stored in two-element arrays Created and Modified, first the upper then the lower 32 bits.

-
- -

TT_HoriHeader

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_HoriHeader_
-  {
-    FT_Fixed   Version;
-    FT_Short   Ascender;
-    FT_Short   Descender;
-    FT_Short   Line_Gap;
-
-    FT_UShort  advance_Width_Max;      /* advance width maximum */
-
-    FT_Short   min_Left_Side_Bearing;  /* minimum left-sb       */
-    FT_Short   min_Right_Side_Bearing; /* minimum right-sb      */
-    FT_Short   xMax_Extent;            /* xmax extents          */
-    FT_Short   caret_Slope_Rise;
-    FT_Short   caret_Slope_Run;
-    FT_Short   caret_Offset;
-
-    FT_Short   Reserved[4];
-
-    FT_Short   metric_Data_Format;
-    FT_UShort  number_Of_HMetrics;
-
-    /* The following fields are not defined by the OpenType specification */
-    /* but they are used to connect the metrics header to the relevant    */
-    /* 'hmtx' table.                                                      */
-
-    void*      long_metrics;
-    void*      short_metrics;
-
-  } TT_HoriHeader;
-
-
- -

A structure to model a TrueType horizontal header, the ‘hhea’ table, as well as the corresponding horizontal metrics table, ‘hmtx’.

-

fields

- - - - - - - - - - - - - - - - - - -
Version -

The table version.

-
Ascender -

The font's ascender, i.e., the distance from the baseline to the top-most of all glyph points found in the font.

-

This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII).

-

You should use the sTypoAscender field of the ‘OS/2’ table instead if you want the correct one.

-
Descender -

The font's descender, i.e., the distance from the baseline to the bottom-most of all glyph points found in the font. It is negative.

-

This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII).

-

You should use the sTypoDescender field of the ‘OS/2’ table instead if you want the correct one.

-
Line_Gap -

The font's line gap, i.e., the distance to add to the ascender and descender to get the BTB, i.e., the baseline-to-baseline distance for the font.

-
advance_Width_Max -

This field is the maximum of all advance widths found in the font. It can be used to compute the maximum width of an arbitrary string of text.

-
min_Left_Side_Bearing -

The minimum left side bearing of all glyphs within the font.

-
min_Right_Side_Bearing -

The minimum right side bearing of all glyphs within the font.

-
xMax_Extent -

The maximum horizontal extent (i.e., the ‘width’ of a glyph's bounding box) for all glyphs in the font.

-
caret_Slope_Rise -

The rise coefficient of the cursor's slope of the cursor (slope=rise/run).

-
caret_Slope_Run -

The run coefficient of the cursor's slope.

-
caret_Offset -

The cursor's offset for slanted fonts.

-
Reserved -

8 reserved bytes.

-
metric_Data_Format -

Always 0.

-
number_Of_HMetrics -

Number of HMetrics entries in the ‘hmtx’ table -- this value can be smaller than the total number of glyphs in the font.

-
long_metrics -

A pointer into the ‘hmtx’ table.

-
short_metrics -

A pointer into the ‘hmtx’ table.

-
- -

note

- -

For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an ‘MVAR’ table: caret_Slope_Rise, caret_Slope_Run, and caret_Offset.

-
- -

TT_VertHeader

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_VertHeader_
-  {
-    FT_Fixed   Version;
-    FT_Short   Ascender;
-    FT_Short   Descender;
-    FT_Short   Line_Gap;
-
-    FT_UShort  advance_Height_Max;      /* advance height maximum */
-
-    FT_Short   min_Top_Side_Bearing;    /* minimum top-sb          */
-    FT_Short   min_Bottom_Side_Bearing; /* minimum bottom-sb       */
-    FT_Short   yMax_Extent;             /* ymax extents            */
-    FT_Short   caret_Slope_Rise;
-    FT_Short   caret_Slope_Run;
-    FT_Short   caret_Offset;
-
-    FT_Short   Reserved[4];
-
-    FT_Short   metric_Data_Format;
-    FT_UShort  number_Of_VMetrics;
-
-    /* The following fields are not defined by the OpenType specification */
-    /* but they are used to connect the metrics header to the relevant    */
-    /* 'vmtx' table.                                                      */
-
-    void*      long_metrics;
-    void*      short_metrics;
-
-  } TT_VertHeader;
-
-
- -

A structure used to model a TrueType vertical header, the ‘vhea’ table, as well as the corresponding vertical metrics table, ‘vmtx’.

-

fields

- - - - - - - - - - - - - - - - - - -
Version -

The table version.

-
Ascender -

The font's ascender, i.e., the distance from the baseline to the top-most of all glyph points found in the font.

-

This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII).

-

You should use the sTypoAscender field of the ‘OS/2’ table instead if you want the correct one.

-
Descender -

The font's descender, i.e., the distance from the baseline to the bottom-most of all glyph points found in the font. It is negative.

-

This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII).

-

You should use the sTypoDescender field of the ‘OS/2’ table instead if you want the correct one.

-
Line_Gap -

The font's line gap, i.e., the distance to add to the ascender and descender to get the BTB, i.e., the baseline-to-baseline distance for the font.

-
advance_Height_Max -

This field is the maximum of all advance heights found in the font. It can be used to compute the maximum height of an arbitrary string of text.

-
min_Top_Side_Bearing -

The minimum top side bearing of all glyphs within the font.

-
min_Bottom_Side_Bearing -

The minimum bottom side bearing of all glyphs within the font.

-
yMax_Extent -

The maximum vertical extent (i.e., the ‘height’ of a glyph's bounding box) for all glyphs in the font.

-
caret_Slope_Rise -

The rise coefficient of the cursor's slope of the cursor (slope=rise/run).

-
caret_Slope_Run -

The run coefficient of the cursor's slope.

-
caret_Offset -

The cursor's offset for slanted fonts.

-
Reserved -

8 reserved bytes.

-
metric_Data_Format -

Always 0.

-
number_Of_VMetrics -

Number of VMetrics entries in the ‘vmtx’ table -- this value can be smaller than the total number of glyphs in the font.

-
long_metrics -

A pointer into the ‘vmtx’ table.

-
short_metrics -

A pointer into the ‘vmtx’ table.

-
- -

note

- -

For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an ‘MVAR’ table: Ascender, Descender, Line_Gap, caret_Slope_Rise, caret_Slope_Run, and caret_Offset.

-
- -

TT_OS2

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_OS2_
-  {
-    FT_UShort  version;                /* 0x0001 - more or 0xFFFF */
-    FT_Short   xAvgCharWidth;
-    FT_UShort  usWeightClass;
-    FT_UShort  usWidthClass;
-    FT_UShort  fsType;
-    FT_Short   ySubscriptXSize;
-    FT_Short   ySubscriptYSize;
-    FT_Short   ySubscriptXOffset;
-    FT_Short   ySubscriptYOffset;
-    FT_Short   ySuperscriptXSize;
-    FT_Short   ySuperscriptYSize;
-    FT_Short   ySuperscriptXOffset;
-    FT_Short   ySuperscriptYOffset;
-    FT_Short   yStrikeoutSize;
-    FT_Short   yStrikeoutPosition;
-    FT_Short   sFamilyClass;
-
-    FT_Byte    panose[10];
-
-    FT_ULong   ulUnicodeRange1;        /* Bits 0-31   */
-    FT_ULong   ulUnicodeRange2;        /* Bits 32-63  */
-    FT_ULong   ulUnicodeRange3;        /* Bits 64-95  */
-    FT_ULong   ulUnicodeRange4;        /* Bits 96-127 */
-
-    FT_Char    achVendID[4];
-
-    FT_UShort  fsSelection;
-    FT_UShort  usFirstCharIndex;
-    FT_UShort  usLastCharIndex;
-    FT_Short   sTypoAscender;
-    FT_Short   sTypoDescender;
-    FT_Short   sTypoLineGap;
-    FT_UShort  usWinAscent;
-    FT_UShort  usWinDescent;
-
-    /* only version 1 and higher: */
-
-    FT_ULong   ulCodePageRange1;       /* Bits 0-31   */
-    FT_ULong   ulCodePageRange2;       /* Bits 32-63  */
-
-    /* only version 2 and higher: */
-
-    FT_Short   sxHeight;
-    FT_Short   sCapHeight;
-    FT_UShort  usDefaultChar;
-    FT_UShort  usBreakChar;
-    FT_UShort  usMaxContext;
-
-    /* only version 5 and higher: */
-
-    FT_UShort  usLowerOpticalPointSize;       /* in twips (1/20th points) */
-    FT_UShort  usUpperOpticalPointSize;       /* in twips (1/20th points) */
-
-  } TT_OS2;
-
-
- -

A structure to model a TrueType ‘OS/2’ table. All fields comply to the OpenType specification.

-

Note that we now support old Mac fonts that do not include an ‘OS/2’ table. In this case, the version field is always set to 0xFFFF.

-

note

- -

For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an ‘MVAR’ table: sCapHeight, sTypoAscender, sTypoDescender, sTypoLineGap, sxHeight, usWinAscent, usWinDescent, yStrikeoutPosition, yStrikeoutSize, ySubscriptXOffset, ySubScriptXSize, ySubscriptYOffset, ySubscriptYSize, ySuperscriptXOffset, ySuperscriptXSize, ySuperscriptYOffset, and ySuperscriptYSize.

-

Possible values for bits in the ulUnicodeRangeX fields are given by the TT_UCR_XXX macros.

-
- -

TT_Postscript

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_Postscript_
-  {
-    FT_Fixed  FormatType;
-    FT_Fixed  italicAngle;
-    FT_Short  underlinePosition;
-    FT_Short  underlineThickness;
-    FT_ULong  isFixedPitch;
-    FT_ULong  minMemType42;
-    FT_ULong  maxMemType42;
-    FT_ULong  minMemType1;
-    FT_ULong  maxMemType1;
-
-    /* Glyph names follow in the 'post' table, but we don't */
-    /* load them by default.                                */
-
-  } TT_Postscript;
-
-
- -

A structure to model a TrueType ‘post’ table. All fields comply to the OpenType specification. This structure does not reference a font's PostScript glyph names; use FT_Get_Glyph_Name to retrieve them.

-

note

- -

For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an ‘MVAR’ table: underlinePosition and underlineThickness.

-
- -

TT_PCLT

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_PCLT_
-  {
-    FT_Fixed   Version;
-    FT_ULong   FontNumber;
-    FT_UShort  Pitch;
-    FT_UShort  xHeight;
-    FT_UShort  Style;
-    FT_UShort  TypeFamily;
-    FT_UShort  CapHeight;
-    FT_UShort  SymbolSet;
-    FT_Char    TypeFace[16];
-    FT_Char    CharacterComplement[8];
-    FT_Char    FileName[6];
-    FT_Char    StrokeWeight;
-    FT_Char    WidthType;
-    FT_Byte    SerifStyle;
-    FT_Byte    Reserved;
-
-  } TT_PCLT;
-
-
- -

A structure to model a TrueType ‘PCLT’ table. All fields comply to the OpenType specification.

-
- -

TT_MaxProfile

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef struct  TT_MaxProfile_
-  {
-    FT_Fixed   version;
-    FT_UShort  numGlyphs;
-    FT_UShort  maxPoints;
-    FT_UShort  maxContours;
-    FT_UShort  maxCompositePoints;
-    FT_UShort  maxCompositeContours;
-    FT_UShort  maxZones;
-    FT_UShort  maxTwilightPoints;
-    FT_UShort  maxStorage;
-    FT_UShort  maxFunctionDefs;
-    FT_UShort  maxInstructionDefs;
-    FT_UShort  maxStackElements;
-    FT_UShort  maxSizeOfInstructions;
-    FT_UShort  maxComponentElements;
-    FT_UShort  maxComponentDepth;
-
-  } TT_MaxProfile;
-
-
- -

The maximum profile (‘maxp’) table contains many max values, which can be used to pre-allocate arrays for speeding up glyph loading and hinting.

-

fields

- - - - - - - - - - - - - - - - - -
version -

The version number.

-
numGlyphs -

The number of glyphs in this TrueType font.

-
maxPoints -

The maximum number of points in a non-composite TrueType glyph. See also maxCompositePoints.

-
maxContours -

The maximum number of contours in a non-composite TrueType glyph. See also maxCompositeContours.

-
maxCompositePoints -

The maximum number of points in a composite TrueType glyph. See also maxPoints.

-
maxCompositeContours -

The maximum number of contours in a composite TrueType glyph. See also maxContours.

-
maxZones -

The maximum number of zones used for glyph hinting.

-
maxTwilightPoints -

The maximum number of points in the twilight zone used for glyph hinting.

-
maxStorage -

The maximum number of elements in the storage area used for glyph hinting.

-
maxFunctionDefs -

The maximum number of function definitions in the TrueType bytecode for this font.

-
maxInstructionDefs -

The maximum number of instruction definitions in the TrueType bytecode for this font.

-
maxStackElements -

The maximum number of stack elements used during bytecode interpretation.

-
maxSizeOfInstructions -

The maximum number of TrueType opcodes used for glyph hinting.

-
maxComponentElements -

The maximum number of simple (i.e., non-composite) glyphs in a composite glyph.

-
maxComponentDepth -

The maximum nesting depth of composite glyphs.

-
- -

note

- -

This structure is only used during font loading.

-
- -

FT_Sfnt_Tag

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  typedef enum  FT_Sfnt_Tag_
-  {
-    FT_SFNT_HEAD,
-    FT_SFNT_MAXP,
-    FT_SFNT_OS2,
-    FT_SFNT_HHEA,
-    FT_SFNT_VHEA,
-    FT_SFNT_POST,
-    FT_SFNT_PCLT,
-
-    FT_SFNT_MAX
-
-  } FT_Sfnt_Tag;
-
-  /* these constants are deprecated; use the corresponding `FT_Sfnt_Tag` */
-  /* values instead                                                      */
-#define ft_sfnt_head  FT_SFNT_HEAD
-#define ft_sfnt_maxp  FT_SFNT_MAXP
-#define ft_sfnt_os2   FT_SFNT_OS2
-#define ft_sfnt_hhea  FT_SFNT_HHEA
-#define ft_sfnt_vhea  FT_SFNT_VHEA
-#define ft_sfnt_post  FT_SFNT_POST
-#define ft_sfnt_pclt  FT_SFNT_PCLT
-
-
- -

An enumeration to specify indices of SFNT tables loaded and parsed by FreeType during initialization of an SFNT font. Used in the FT_Get_Sfnt_Table API function.

-

values

- - - - - - - - - -
FT_SFNT_HEAD -

To access the font's TT_Header structure.

-
FT_SFNT_MAXP -

To access the font's TT_MaxProfile structure.

-
FT_SFNT_OS2 -

To access the font's TT_OS2 structure.

-
FT_SFNT_HHEA -

To access the font's TT_HoriHeader structure.

-
FT_SFNT_VHEA -

To access the font's TT_VertHeader structure.

-
FT_SFNT_POST -

To access the font's TT_Postscript structure.

-
FT_SFNT_PCLT -

To access the font's TT_PCLT structure.

-
- -
- -

FT_Get_Sfnt_Table

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  FT_EXPORT( void* )
-  FT_Get_Sfnt_Table( FT_Face      face,
-                     FT_Sfnt_Tag  tag );
-
-
- -

Return a pointer to a given SFNT table stored within a face.

-

input

- - - - -
face -

A handle to the source.

-
tag -

The index of the SFNT table.

-
- -

return

- -

A type-less pointer to the table. This will be NULL in case of error, or if the corresponding table was not found OR loaded from the file.

-

Use a typecast according to tag to access the structure elements.

-

note

- -

The table is owned by the face object and disappears with it.

-

This function is only useful to access SFNT tables that are loaded by the sfnt, truetype, and opentype drivers. See FT_Sfnt_Tag for a list.

-

example

- -

Here is an example demonstrating access to the ‘vhea’ table. -

  TT_VertHeader*  vert_header;
-
-
-  vert_header =
-    (TT_VertHeader*)FT_Get_Sfnt_Table( face, FT_SFNT_VHEA );
-

-
- -

FT_Load_Sfnt_Table

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Load_Sfnt_Table( FT_Face    face,
-                      FT_ULong   tag,
-                      FT_Long    offset,
-                      FT_Byte*   buffer,
-                      FT_ULong*  length );
-
-
- -

Load any SFNT font table into client memory.

-

input

- - - - - -
face -

A handle to the source face.

-
tag -

The four-byte tag of the table to load. Use value 0 if you want to access the whole font file. Otherwise, you can use one of the definitions found in the FT_TRUETYPE_TAGS_H file, or forge a new one with FT_MAKE_TAG.

-
offset -

The starting offset in the table (or file if tag == 0).

-
- -

output

- - - -
buffer -

The target buffer address. The client must ensure that the memory array is big enough to hold the data.

-
- -

inout

- - - -
length -

If the length parameter is NULL, try to load the whole table. Return an error code if it fails.

-

Else, if *length is 0, exit immediately while returning the table's (or file) full size in it.

-

Else the number of bytes to read from the table or file, from the starting offset.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

If you need to determine the table's length you should first call this function with *length set to 0, as in the following example: -

  FT_ULong  length = 0;
-
-
-  error = FT_Load_Sfnt_Table( face, tag, 0, NULL, &length );
-  if ( error ) { ... table does not exist ... }
-
-  buffer = malloc( length );
-  if ( buffer == NULL ) { ... not enough memory ... }
-
-  error = FT_Load_Sfnt_Table( face, tag, 0, buffer, &length );
-  if ( error ) { ... could not load table ... }
-

-

Note that structures like TT_Header or TT_OS2 can't be used with this function; they are limited to FT_Get_Sfnt_Table. Reason is that those structures depend on the processor architecture, with varying size (e.g. 32bit vs. 64bit) or order (big endian vs. little endian).

-
- -

FT_Sfnt_Table_Info

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  FT_EXPORT( FT_Error )
-  FT_Sfnt_Table_Info( FT_Face    face,
-                      FT_UInt    table_index,
-                      FT_ULong  *tag,
-                      FT_ULong  *length );
-
-
- -

Return information on an SFNT table.

-

input

- - - - -
face -

A handle to the source face.

-
table_index -

The index of an SFNT table. The function returns FT_Err_Table_Missing for an invalid value.

-
- -

inout

- - - -
tag -

The name tag of the SFNT table. If the value is NULL, table_index is ignored, and length returns the number of SFNT tables in the font.

-
- -

output

- - - -
length -

The length of the SFNT table (or the number of SFNT tables, depending on tag).

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

While parsing fonts, FreeType handles SFNT tables with length zero as missing.

-
- -

FT_Get_CMap_Language_ID

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  FT_EXPORT( FT_ULong )
-  FT_Get_CMap_Language_ID( FT_CharMap  charmap );
-
-
- -

Return cmap language ID as specified in the OpenType standard. Definitions of language ID values are in file FT_TRUETYPE_IDS_H.

-

input

- - - -
charmap -

The target charmap.

-
- -

return

- -

The language ID of charmap. If charmap doesn't belong to an SFNT face, just return 0 as the default value.

-

For a format 14 cmap (to access Unicode IVS), the return value is 0xFFFFFFFF.

-
- -

FT_Get_CMap_Format

-

Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h).

-
-
-  FT_EXPORT( FT_Long )
-  FT_Get_CMap_Format( FT_CharMap  charmap );
-
-
- -

Return the format of an SFNT ‘cmap’ table.

-

input

- - - -
charmap -

The target charmap.

-
- -

return

- -

The format of charmap. If charmap doesn't belong to an SFNT face, return -1.

-
- -

FT_PARAM_TAG_UNPATENTED_HINTING

-
-
-#define FT_PARAM_TAG_UNPATENTED_HINTING \
-          FT_MAKE_TAG( 'u', 'n', 'p', 'a' )
-
-
- -

Deprecated, no effect.

-

Previously: A constant used as the tag of an FT_Parameter structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by FT_Open_Face.

-
- -

TT_PLATFORM_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_PLATFORM_APPLE_UNICODE  0
-#define TT_PLATFORM_MACINTOSH      1
-#define TT_PLATFORM_ISO            2 /* deprecated */
-#define TT_PLATFORM_MICROSOFT      3
-#define TT_PLATFORM_CUSTOM         4
-#define TT_PLATFORM_ADOBE          7 /* artificial */
-
-
- -

A list of valid values for the platform_id identifier code in FT_CharMapRec and FT_SfntName structures.

-

values

- - - - - - - - -
TT_PLATFORM_APPLE_UNICODE -

Used by Apple to indicate a Unicode character map and/or name entry. See TT_APPLE_ID_XXX for corresponding encoding_id values. Note that name entries in this format are coded as big-endian UCS-2 character codes only.

-
TT_PLATFORM_MACINTOSH -

Used by Apple to indicate a MacOS-specific charmap and/or name entry. See TT_MAC_ID_XXX for corresponding encoding_id values. Note that most TrueType fonts contain an Apple roman charmap to be usable on MacOS systems (even if they contain a Microsoft charmap as well).

-
TT_PLATFORM_ISO -

This value was used to specify ISO/IEC 10646 charmaps. It is however now deprecated. See TT_ISO_ID_XXX for a list of corresponding encoding_id values.

-
TT_PLATFORM_MICROSOFT -

Used by Microsoft to indicate Windows-specific charmaps. See TT_MS_ID_XXX for a list of corresponding encoding_id values. Note that most fonts contain a Unicode charmap using (TT_PLATFORM_MICROSOFT, TT_MS_ID_UNICODE_CS).

-
TT_PLATFORM_CUSTOM -

Used to indicate application-specific charmaps.

-
TT_PLATFORM_ADOBE -

This value isn't part of any font format specification, but is used by FreeType to report Adobe-specific charmaps in an FT_CharMapRec structure. See TT_ADOBE_ID_XXX.

-
- -
- -

TT_APPLE_ID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_APPLE_ID_DEFAULT           0 /* Unicode 1.0                   */
-#define TT_APPLE_ID_UNICODE_1_1       1 /* specify Hangul at U+34xx      */
-#define TT_APPLE_ID_ISO_10646         2 /* deprecated                    */
-#define TT_APPLE_ID_UNICODE_2_0       3 /* or later                      */
-#define TT_APPLE_ID_UNICODE_32        4 /* 2.0 or later, full repertoire */
-#define TT_APPLE_ID_VARIANT_SELECTOR  5 /* variation selector data       */
-#define TT_APPLE_ID_FULL_UNICODE      6 /* used with type 13 cmaps       */
-
-
- -

A list of valid values for the encoding_id for TT_PLATFORM_APPLE_UNICODE charmaps and name entries.

-

values

- - - - - - - - - -
TT_APPLE_ID_DEFAULT -

Unicode version 1.0.

-
TT_APPLE_ID_UNICODE_1_1 -

Unicode 1.1; specifies Hangul characters starting at U+34xx.

-
TT_APPLE_ID_ISO_10646 -

Deprecated (identical to preceding).

-
TT_APPLE_ID_UNICODE_2_0 -

Unicode 2.0 and beyond (UTF-16 BMP only).

-
TT_APPLE_ID_UNICODE_32 -

Unicode 3.1 and beyond, using UTF-32.

-
TT_APPLE_ID_VARIANT_SELECTOR -

From Adobe, not Apple. Not a normal cmap. Specifies variations on a real cmap.

-
TT_APPLE_ID_FULL_UNICODE -

Used for fallback fonts that provide complete Unicode coverage with a type 13 cmap.

-
- -
- -

TT_MAC_ID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_MAC_ID_ROMAN                 0
-#define TT_MAC_ID_JAPANESE              1
-#define TT_MAC_ID_TRADITIONAL_CHINESE   2
-#define TT_MAC_ID_KOREAN                3
-#define TT_MAC_ID_ARABIC                4
-#define TT_MAC_ID_HEBREW                5
-#define TT_MAC_ID_GREEK                 6
-#define TT_MAC_ID_RUSSIAN               7
-#define TT_MAC_ID_RSYMBOL               8
-#define TT_MAC_ID_DEVANAGARI            9
-#define TT_MAC_ID_GURMUKHI             10
-#define TT_MAC_ID_GUJARATI             11
-#define TT_MAC_ID_ORIYA                12
-#define TT_MAC_ID_BENGALI              13
-#define TT_MAC_ID_TAMIL                14
-#define TT_MAC_ID_TELUGU               15
-#define TT_MAC_ID_KANNADA              16
-#define TT_MAC_ID_MALAYALAM            17
-#define TT_MAC_ID_SINHALESE            18
-#define TT_MAC_ID_BURMESE              19
-#define TT_MAC_ID_KHMER                20
-#define TT_MAC_ID_THAI                 21
-#define TT_MAC_ID_LAOTIAN              22
-#define TT_MAC_ID_GEORGIAN             23
-#define TT_MAC_ID_ARMENIAN             24
-#define TT_MAC_ID_MALDIVIAN            25
-#define TT_MAC_ID_SIMPLIFIED_CHINESE   25
-#define TT_MAC_ID_TIBETAN              26
-#define TT_MAC_ID_MONGOLIAN            27
-#define TT_MAC_ID_GEEZ                 28
-#define TT_MAC_ID_SLAVIC               29
-#define TT_MAC_ID_VIETNAMESE           30
-#define TT_MAC_ID_SINDHI               31
-#define TT_MAC_ID_UNINTERP             32
-
-
- -

A list of valid values for the encoding_id for TT_PLATFORM_MACINTOSH charmaps and name entries.

-
- -

TT_ISO_ID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_ISO_ID_7BIT_ASCII  0
-#define TT_ISO_ID_10646       1
-#define TT_ISO_ID_8859_1      2
-
-
- -

A list of valid values for the encoding_id for TT_PLATFORM_ISO charmaps and name entries.

-

Their use is now deprecated.

-

values

- - - - - -
TT_ISO_ID_7BIT_ASCII -

ASCII.

-
TT_ISO_ID_10646 -

ISO/10646.

-
TT_ISO_ID_8859_1 -

Also known as Latin-1.

-
- -
- -

TT_MS_ID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_MS_ID_SYMBOL_CS    0
-#define TT_MS_ID_UNICODE_CS   1
-#define TT_MS_ID_SJIS         2
-#define TT_MS_ID_PRC          3
-#define TT_MS_ID_BIG_5        4
-#define TT_MS_ID_WANSUNG      5
-#define TT_MS_ID_JOHAB        6
-#define TT_MS_ID_UCS_4       10
-
-  /* this value is deprecated */
-#define TT_MS_ID_GB2312  TT_MS_ID_PRC
-
-
- -

A list of valid values for the encoding_id for TT_PLATFORM_MICROSOFT charmaps and name entries.

-

values

- - - - - - - - - - -
TT_MS_ID_SYMBOL_CS -

Microsoft symbol encoding. See FT_ENCODING_MS_SYMBOL.

-
TT_MS_ID_UNICODE_CS -

Microsoft WGL4 charmap, matching Unicode. See FT_ENCODING_UNICODE.

-
TT_MS_ID_SJIS -

Shift JIS Japanese encoding. See FT_ENCODING_SJIS.

-
TT_MS_ID_PRC -

Chinese encodings as used in the People's Republic of China (PRC). This means the encodings GB 2312 and its supersets GBK and GB 18030. See FT_ENCODING_PRC.

-
TT_MS_ID_BIG_5 -

Traditional Chinese as used in Taiwan and Hong Kong. See FT_ENCODING_BIG5.

-
TT_MS_ID_WANSUNG -

Korean Extended Wansung encoding. See FT_ENCODING_WANSUNG.

-
TT_MS_ID_JOHAB -

Korean Johab encoding. See FT_ENCODING_JOHAB.

-
TT_MS_ID_UCS_4 -

UCS-4 or UTF-32 charmaps. This has been added to the OpenType specification version 1.4 (mid-2001).

-
- -
- -

TT_ADOBE_ID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_ADOBE_ID_STANDARD  0
-#define TT_ADOBE_ID_EXPERT    1
-#define TT_ADOBE_ID_CUSTOM    2
-#define TT_ADOBE_ID_LATIN_1   3
-
-
- -

A list of valid values for the encoding_id for TT_PLATFORM_ADOBE charmaps. This is a FreeType-specific extension!

-

values

- - - - - - -
TT_ADOBE_ID_STANDARD -

Adobe standard encoding.

-
TT_ADOBE_ID_EXPERT -

Adobe expert encoding.

-
TT_ADOBE_ID_CUSTOM -

Adobe custom encoding.

-
TT_ADOBE_ID_LATIN_1 -

Adobe Latin 1 encoding.

-
- -
- -

TT_MAC_LANGID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_MAC_LANGID_ENGLISH                       0
-#define TT_MAC_LANGID_FRENCH                        1
-#define TT_MAC_LANGID_GERMAN                        2
-#define TT_MAC_LANGID_ITALIAN                       3
-#define TT_MAC_LANGID_DUTCH                         4
-#define TT_MAC_LANGID_SWEDISH                       5
-#define TT_MAC_LANGID_SPANISH                       6
-#define TT_MAC_LANGID_DANISH                        7
-#define TT_MAC_LANGID_PORTUGUESE                    8
-#define TT_MAC_LANGID_NORWEGIAN                     9
-#define TT_MAC_LANGID_HEBREW                       10
-#define TT_MAC_LANGID_JAPANESE                     11
-#define TT_MAC_LANGID_ARABIC                       12
-#define TT_MAC_LANGID_FINNISH                      13
-#define TT_MAC_LANGID_GREEK                        14
-#define TT_MAC_LANGID_ICELANDIC                    15
-#define TT_MAC_LANGID_MALTESE                      16
-#define TT_MAC_LANGID_TURKISH                      17
-#define TT_MAC_LANGID_CROATIAN                     18
-#define TT_MAC_LANGID_CHINESE_TRADITIONAL          19
-#define TT_MAC_LANGID_URDU                         20
-#define TT_MAC_LANGID_HINDI                        21
-#define TT_MAC_LANGID_THAI                         22
-#define TT_MAC_LANGID_KOREAN                       23
-#define TT_MAC_LANGID_LITHUANIAN                   24
-#define TT_MAC_LANGID_POLISH                       25
-#define TT_MAC_LANGID_HUNGARIAN                    26
-#define TT_MAC_LANGID_ESTONIAN                     27
-#define TT_MAC_LANGID_LETTISH                      28
-#define TT_MAC_LANGID_SAAMISK                      29
-#define TT_MAC_LANGID_FAEROESE                     30
-#define TT_MAC_LANGID_FARSI                        31
-#define TT_MAC_LANGID_RUSSIAN                      32
-#define TT_MAC_LANGID_CHINESE_SIMPLIFIED           33
-#define TT_MAC_LANGID_FLEMISH                      34
-#define TT_MAC_LANGID_IRISH                        35
-#define TT_MAC_LANGID_ALBANIAN                     36
-#define TT_MAC_LANGID_ROMANIAN                     37
-#define TT_MAC_LANGID_CZECH                        38
-#define TT_MAC_LANGID_SLOVAK                       39
-#define TT_MAC_LANGID_SLOVENIAN                    40
-#define TT_MAC_LANGID_YIDDISH                      41
-#define TT_MAC_LANGID_SERBIAN                      42
-#define TT_MAC_LANGID_MACEDONIAN                   43
-#define TT_MAC_LANGID_BULGARIAN                    44
-#define TT_MAC_LANGID_UKRAINIAN                    45
-#define TT_MAC_LANGID_BYELORUSSIAN                 46
-#define TT_MAC_LANGID_UZBEK                        47
-#define TT_MAC_LANGID_KAZAKH                       48
-#define TT_MAC_LANGID_AZERBAIJANI                  49
-#define TT_MAC_LANGID_AZERBAIJANI_CYRILLIC_SCRIPT  49
-#define TT_MAC_LANGID_AZERBAIJANI_ARABIC_SCRIPT    50
-#define TT_MAC_LANGID_ARMENIAN                     51
-#define TT_MAC_LANGID_GEORGIAN                     52
-#define TT_MAC_LANGID_MOLDAVIAN                    53
-#define TT_MAC_LANGID_KIRGHIZ                      54
-#define TT_MAC_LANGID_TAJIKI                       55
-#define TT_MAC_LANGID_TURKMEN                      56
-#define TT_MAC_LANGID_MONGOLIAN                    57
-#define TT_MAC_LANGID_MONGOLIAN_MONGOLIAN_SCRIPT   57
-#define TT_MAC_LANGID_MONGOLIAN_CYRILLIC_SCRIPT    58
-#define TT_MAC_LANGID_PASHTO                       59
-#define TT_MAC_LANGID_KURDISH                      60
-#define TT_MAC_LANGID_KASHMIRI                     61
-#define TT_MAC_LANGID_SINDHI                       62
-#define TT_MAC_LANGID_TIBETAN                      63
-#define TT_MAC_LANGID_NEPALI                       64
-#define TT_MAC_LANGID_SANSKRIT                     65
-#define TT_MAC_LANGID_MARATHI                      66
-#define TT_MAC_LANGID_BENGALI                      67
-#define TT_MAC_LANGID_ASSAMESE                     68
-#define TT_MAC_LANGID_GUJARATI                     69
-#define TT_MAC_LANGID_PUNJABI                      70
-#define TT_MAC_LANGID_ORIYA                        71
-#define TT_MAC_LANGID_MALAYALAM                    72
-#define TT_MAC_LANGID_KANNADA                      73
-#define TT_MAC_LANGID_TAMIL                        74
-#define TT_MAC_LANGID_TELUGU                       75
-#define TT_MAC_LANGID_SINHALESE                    76
-#define TT_MAC_LANGID_BURMESE                      77
-#define TT_MAC_LANGID_KHMER                        78
-#define TT_MAC_LANGID_LAO                          79
-#define TT_MAC_LANGID_VIETNAMESE                   80
-#define TT_MAC_LANGID_INDONESIAN                   81
-#define TT_MAC_LANGID_TAGALOG                      82
-#define TT_MAC_LANGID_MALAY_ROMAN_SCRIPT           83
-#define TT_MAC_LANGID_MALAY_ARABIC_SCRIPT          84
-#define TT_MAC_LANGID_AMHARIC                      85
-#define TT_MAC_LANGID_TIGRINYA                     86
-#define TT_MAC_LANGID_GALLA                        87
-#define TT_MAC_LANGID_SOMALI                       88
-#define TT_MAC_LANGID_SWAHILI                      89
-#define TT_MAC_LANGID_RUANDA                       90
-#define TT_MAC_LANGID_RUNDI                        91
-#define TT_MAC_LANGID_CHEWA                        92
-#define TT_MAC_LANGID_MALAGASY                     93
-#define TT_MAC_LANGID_ESPERANTO                    94
-#define TT_MAC_LANGID_WELSH                       128
-#define TT_MAC_LANGID_BASQUE                      129
-#define TT_MAC_LANGID_CATALAN                     130
-#define TT_MAC_LANGID_LATIN                       131
-#define TT_MAC_LANGID_QUECHUA                     132
-#define TT_MAC_LANGID_GUARANI                     133
-#define TT_MAC_LANGID_AYMARA                      134
-#define TT_MAC_LANGID_TATAR                       135
-#define TT_MAC_LANGID_UIGHUR                      136
-#define TT_MAC_LANGID_DZONGKHA                    137
-#define TT_MAC_LANGID_JAVANESE                    138
-#define TT_MAC_LANGID_SUNDANESE                   139
-
-  /* The following codes are new as of 2000-03-10 */
-#define TT_MAC_LANGID_GALICIAN                    140
-#define TT_MAC_LANGID_AFRIKAANS                   141
-#define TT_MAC_LANGID_BRETON                      142
-#define TT_MAC_LANGID_INUKTITUT                   143
-#define TT_MAC_LANGID_SCOTTISH_GAELIC             144
-#define TT_MAC_LANGID_MANX_GAELIC                 145
-#define TT_MAC_LANGID_IRISH_GAELIC                146
-#define TT_MAC_LANGID_TONGAN                      147
-#define TT_MAC_LANGID_GREEK_POLYTONIC             148
-#define TT_MAC_LANGID_GREELANDIC                  149
-#define TT_MAC_LANGID_AZERBAIJANI_ROMAN_SCRIPT    150
-
-
- -

Possible values of the language identifier field in the name records of the SFNT ‘name’ table if the ‘platform’ identifier code is TT_PLATFORM_MACINTOSH. These values are also used as return values for function FT_Get_CMap_Language_ID.

-

The canonical source for Apple's IDs is

-

https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6name.html

-
- -

TT_MS_LANGID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_MS_LANGID_ARABIC_SAUDI_ARABIA               0x0401
-#define TT_MS_LANGID_ARABIC_IRAQ                       0x0801
-#define TT_MS_LANGID_ARABIC_EGYPT                      0x0C01
-#define TT_MS_LANGID_ARABIC_LIBYA                      0x1001
-#define TT_MS_LANGID_ARABIC_ALGERIA                    0x1401
-#define TT_MS_LANGID_ARABIC_MOROCCO                    0x1801
-#define TT_MS_LANGID_ARABIC_TUNISIA                    0x1C01
-#define TT_MS_LANGID_ARABIC_OMAN                       0x2001
-#define TT_MS_LANGID_ARABIC_YEMEN                      0x2401
-#define TT_MS_LANGID_ARABIC_SYRIA                      0x2801
-#define TT_MS_LANGID_ARABIC_JORDAN                     0x2C01
-#define TT_MS_LANGID_ARABIC_LEBANON                    0x3001
-#define TT_MS_LANGID_ARABIC_KUWAIT                     0x3401
-#define TT_MS_LANGID_ARABIC_UAE                        0x3801
-#define TT_MS_LANGID_ARABIC_BAHRAIN                    0x3C01
-#define TT_MS_LANGID_ARABIC_QATAR                      0x4001
-#define TT_MS_LANGID_BULGARIAN_BULGARIA                0x0402
-#define TT_MS_LANGID_CATALAN_CATALAN                   0x0403
-#define TT_MS_LANGID_CHINESE_TAIWAN                    0x0404
-#define TT_MS_LANGID_CHINESE_PRC                       0x0804
-#define TT_MS_LANGID_CHINESE_HONG_KONG                 0x0C04
-#define TT_MS_LANGID_CHINESE_SINGAPORE                 0x1004
-#define TT_MS_LANGID_CHINESE_MACAO                     0x1404
-#define TT_MS_LANGID_CZECH_CZECH_REPUBLIC              0x0405
-#define TT_MS_LANGID_DANISH_DENMARK                    0x0406
-#define TT_MS_LANGID_GERMAN_GERMANY                    0x0407
-#define TT_MS_LANGID_GERMAN_SWITZERLAND                0x0807
-#define TT_MS_LANGID_GERMAN_AUSTRIA                    0x0C07
-#define TT_MS_LANGID_GERMAN_LUXEMBOURG                 0x1007
-#define TT_MS_LANGID_GERMAN_LIECHTENSTEIN              0x1407
-#define TT_MS_LANGID_GREEK_GREECE                      0x0408
-#define TT_MS_LANGID_ENGLISH_UNITED_STATES             0x0409
-#define TT_MS_LANGID_ENGLISH_UNITED_KINGDOM            0x0809
-#define TT_MS_LANGID_ENGLISH_AUSTRALIA                 0x0C09
-#define TT_MS_LANGID_ENGLISH_CANADA                    0x1009
-#define TT_MS_LANGID_ENGLISH_NEW_ZEALAND               0x1409
-#define TT_MS_LANGID_ENGLISH_IRELAND                   0x1809
-#define TT_MS_LANGID_ENGLISH_SOUTH_AFRICA              0x1C09
-#define TT_MS_LANGID_ENGLISH_JAMAICA                   0x2009
-#define TT_MS_LANGID_ENGLISH_CARIBBEAN                 0x2409
-#define TT_MS_LANGID_ENGLISH_BELIZE                    0x2809
-#define TT_MS_LANGID_ENGLISH_TRINIDAD                  0x2C09
-#define TT_MS_LANGID_ENGLISH_ZIMBABWE                  0x3009
-#define TT_MS_LANGID_ENGLISH_PHILIPPINES               0x3409
-#define TT_MS_LANGID_ENGLISH_INDIA                     0x4009
-#define TT_MS_LANGID_ENGLISH_MALAYSIA                  0x4409
-#define TT_MS_LANGID_ENGLISH_SINGAPORE                 0x4809
-#define TT_MS_LANGID_SPANISH_SPAIN_TRADITIONAL_SORT    0x040A
-#define TT_MS_LANGID_SPANISH_MEXICO                    0x080A
-#define TT_MS_LANGID_SPANISH_SPAIN_MODERN_SORT         0x0C0A
-#define TT_MS_LANGID_SPANISH_GUATEMALA                 0x100A
-#define TT_MS_LANGID_SPANISH_COSTA_RICA                0x140A
-#define TT_MS_LANGID_SPANISH_PANAMA                    0x180A
-#define TT_MS_LANGID_SPANISH_DOMINICAN_REPUBLIC        0x1C0A
-#define TT_MS_LANGID_SPANISH_VENEZUELA                 0x200A
-#define TT_MS_LANGID_SPANISH_COLOMBIA                  0x240A
-#define TT_MS_LANGID_SPANISH_PERU                      0x280A
-#define TT_MS_LANGID_SPANISH_ARGENTINA                 0x2C0A
-#define TT_MS_LANGID_SPANISH_ECUADOR                   0x300A
-#define TT_MS_LANGID_SPANISH_CHILE                     0x340A
-#define TT_MS_LANGID_SPANISH_URUGUAY                   0x380A
-#define TT_MS_LANGID_SPANISH_PARAGUAY                  0x3C0A
-#define TT_MS_LANGID_SPANISH_BOLIVIA                   0x400A
-#define TT_MS_LANGID_SPANISH_EL_SALVADOR               0x440A
-#define TT_MS_LANGID_SPANISH_HONDURAS                  0x480A
-#define TT_MS_LANGID_SPANISH_NICARAGUA                 0x4C0A
-#define TT_MS_LANGID_SPANISH_PUERTO_RICO               0x500A
-#define TT_MS_LANGID_SPANISH_UNITED_STATES             0x540A
-#define TT_MS_LANGID_FINNISH_FINLAND                   0x040B
-#define TT_MS_LANGID_FRENCH_FRANCE                     0x040C
-#define TT_MS_LANGID_FRENCH_BELGIUM                    0x080C
-#define TT_MS_LANGID_FRENCH_CANADA                     0x0C0C
-#define TT_MS_LANGID_FRENCH_SWITZERLAND                0x100C
-#define TT_MS_LANGID_FRENCH_LUXEMBOURG                 0x140C
-#define TT_MS_LANGID_FRENCH_MONACO                     0x180C
-#define TT_MS_LANGID_HEBREW_ISRAEL                     0x040D
-#define TT_MS_LANGID_HUNGARIAN_HUNGARY                 0x040E
-#define TT_MS_LANGID_ICELANDIC_ICELAND                 0x040F
-#define TT_MS_LANGID_ITALIAN_ITALY                     0x0410
-#define TT_MS_LANGID_ITALIAN_SWITZERLAND               0x0810
-#define TT_MS_LANGID_JAPANESE_JAPAN                    0x0411
-#define TT_MS_LANGID_KOREAN_KOREA                      0x0412
-#define TT_MS_LANGID_DUTCH_NETHERLANDS                 0x0413
-#define TT_MS_LANGID_DUTCH_BELGIUM                     0x0813
-#define TT_MS_LANGID_NORWEGIAN_NORWAY_BOKMAL           0x0414
-#define TT_MS_LANGID_NORWEGIAN_NORWAY_NYNORSK          0x0814
-#define TT_MS_LANGID_POLISH_POLAND                     0x0415
-#define TT_MS_LANGID_PORTUGUESE_BRAZIL                 0x0416
-#define TT_MS_LANGID_PORTUGUESE_PORTUGAL               0x0816
-#define TT_MS_LANGID_ROMANSH_SWITZERLAND               0x0417
-#define TT_MS_LANGID_ROMANIAN_ROMANIA                  0x0418
-#define TT_MS_LANGID_RUSSIAN_RUSSIA                    0x0419
-#define TT_MS_LANGID_CROATIAN_CROATIA                  0x041A
-#define TT_MS_LANGID_SERBIAN_SERBIA_LATIN              0x081A
-#define TT_MS_LANGID_SERBIAN_SERBIA_CYRILLIC           0x0C1A
-#define TT_MS_LANGID_CROATIAN_BOSNIA_HERZEGOVINA       0x101A
-#define TT_MS_LANGID_BOSNIAN_BOSNIA_HERZEGOVINA        0x141A
-#define TT_MS_LANGID_SERBIAN_BOSNIA_HERZ_LATIN         0x181A
-#define TT_MS_LANGID_SERBIAN_BOSNIA_HERZ_CYRILLIC      0x1C1A
-#define TT_MS_LANGID_BOSNIAN_BOSNIA_HERZ_CYRILLIC      0x201A
-#define TT_MS_LANGID_SLOVAK_SLOVAKIA                   0x041B
-#define TT_MS_LANGID_ALBANIAN_ALBANIA                  0x041C
-#define TT_MS_LANGID_SWEDISH_SWEDEN                    0x041D
-#define TT_MS_LANGID_SWEDISH_FINLAND                   0x081D
-#define TT_MS_LANGID_THAI_THAILAND                     0x041E
-#define TT_MS_LANGID_TURKISH_TURKEY                    0x041F
-#define TT_MS_LANGID_URDU_PAKISTAN                     0x0420
-#define TT_MS_LANGID_INDONESIAN_INDONESIA              0x0421
-#define TT_MS_LANGID_UKRAINIAN_UKRAINE                 0x0422
-#define TT_MS_LANGID_BELARUSIAN_BELARUS                0x0423
-#define TT_MS_LANGID_SLOVENIAN_SLOVENIA                0x0424
-#define TT_MS_LANGID_ESTONIAN_ESTONIA                  0x0425
-#define TT_MS_LANGID_LATVIAN_LATVIA                    0x0426
-#define TT_MS_LANGID_LITHUANIAN_LITHUANIA              0x0427
-#define TT_MS_LANGID_TAJIK_TAJIKISTAN                  0x0428
-#define TT_MS_LANGID_VIETNAMESE_VIET_NAM               0x042A
-#define TT_MS_LANGID_ARMENIAN_ARMENIA                  0x042B
-#define TT_MS_LANGID_AZERI_AZERBAIJAN_LATIN            0x042C
-#define TT_MS_LANGID_AZERI_AZERBAIJAN_CYRILLIC         0x082C
-#define TT_MS_LANGID_BASQUE_BASQUE                     0x042D
-#define TT_MS_LANGID_UPPER_SORBIAN_GERMANY             0x042E
-#define TT_MS_LANGID_LOWER_SORBIAN_GERMANY             0x082E
-#define TT_MS_LANGID_MACEDONIAN_MACEDONIA              0x042F
-#define TT_MS_LANGID_SETSWANA_SOUTH_AFRICA             0x0432
-#define TT_MS_LANGID_ISIXHOSA_SOUTH_AFRICA             0x0434
-#define TT_MS_LANGID_ISIZULU_SOUTH_AFRICA              0x0435
-#define TT_MS_LANGID_AFRIKAANS_SOUTH_AFRICA            0x0436
-#define TT_MS_LANGID_GEORGIAN_GEORGIA                  0x0437
-#define TT_MS_LANGID_FAEROESE_FAEROE_ISLANDS           0x0438
-#define TT_MS_LANGID_HINDI_INDIA                       0x0439
-#define TT_MS_LANGID_MALTESE_MALTA                     0x043A
-#define TT_MS_LANGID_SAMI_NORTHERN_NORWAY              0x043B
-#define TT_MS_LANGID_SAMI_NORTHERN_SWEDEN              0x083B
-#define TT_MS_LANGID_SAMI_NORTHERN_FINLAND             0x0C3B
-#define TT_MS_LANGID_SAMI_LULE_NORWAY                  0x103B
-#define TT_MS_LANGID_SAMI_LULE_SWEDEN                  0x143B
-#define TT_MS_LANGID_SAMI_SOUTHERN_NORWAY              0x183B
-#define TT_MS_LANGID_SAMI_SOUTHERN_SWEDEN              0x1C3B
-#define TT_MS_LANGID_SAMI_SKOLT_FINLAND                0x203B
-#define TT_MS_LANGID_SAMI_INARI_FINLAND                0x243B
-#define TT_MS_LANGID_IRISH_IRELAND                     0x083C
-#define TT_MS_LANGID_MALAY_MALAYSIA                    0x043E
-#define TT_MS_LANGID_MALAY_BRUNEI_DARUSSALAM           0x083E
-#define TT_MS_LANGID_KAZAKH_KAZAKHSTAN                 0x043F
-#define TT_MS_LANGID_KYRGYZ_KYRGYZSTAN /* Cyrillic*/   0x0440
-#define TT_MS_LANGID_KISWAHILI_KENYA                   0x0441
-#define TT_MS_LANGID_TURKMEN_TURKMENISTAN              0x0442
-#define TT_MS_LANGID_UZBEK_UZBEKISTAN_LATIN            0x0443
-#define TT_MS_LANGID_UZBEK_UZBEKISTAN_CYRILLIC         0x0843
-#define TT_MS_LANGID_TATAR_RUSSIA                      0x0444
-#define TT_MS_LANGID_BENGALI_INDIA                     0x0445
-#define TT_MS_LANGID_BENGALI_BANGLADESH                0x0845
-#define TT_MS_LANGID_PUNJABI_INDIA                     0x0446
-#define TT_MS_LANGID_GUJARATI_INDIA                    0x0447
-#define TT_MS_LANGID_ODIA_INDIA                        0x0448
-#define TT_MS_LANGID_TAMIL_INDIA                       0x0449
-#define TT_MS_LANGID_TELUGU_INDIA                      0x044A
-#define TT_MS_LANGID_KANNADA_INDIA                     0x044B
-#define TT_MS_LANGID_MALAYALAM_INDIA                   0x044C
-#define TT_MS_LANGID_ASSAMESE_INDIA                    0x044D
-#define TT_MS_LANGID_MARATHI_INDIA                     0x044E
-#define TT_MS_LANGID_SANSKRIT_INDIA                    0x044F
-#define TT_MS_LANGID_MONGOLIAN_MONGOLIA /* Cyrillic */ 0x0450
-#define TT_MS_LANGID_MONGOLIAN_PRC                     0x0850
-#define TT_MS_LANGID_TIBETAN_PRC                       0x0451
-#define TT_MS_LANGID_WELSH_UNITED_KINGDOM              0x0452
-#define TT_MS_LANGID_KHMER_CAMBODIA                    0x0453
-#define TT_MS_LANGID_LAO_LAOS                          0x0454
-#define TT_MS_LANGID_GALICIAN_GALICIAN                 0x0456
-#define TT_MS_LANGID_KONKANI_INDIA                     0x0457
-#define TT_MS_LANGID_SYRIAC_SYRIA                      0x045A
-#define TT_MS_LANGID_SINHALA_SRI_LANKA                 0x045B
-#define TT_MS_LANGID_INUKTITUT_CANADA                  0x045D
-#define TT_MS_LANGID_INUKTITUT_CANADA_LATIN            0x085D
-#define TT_MS_LANGID_AMHARIC_ETHIOPIA                  0x045E
-#define TT_MS_LANGID_TAMAZIGHT_ALGERIA                 0x085F
-#define TT_MS_LANGID_NEPALI_NEPAL                      0x0461
-#define TT_MS_LANGID_FRISIAN_NETHERLANDS               0x0462
-#define TT_MS_LANGID_PASHTO_AFGHANISTAN                0x0463
-#define TT_MS_LANGID_FILIPINO_PHILIPPINES              0x0464
-#define TT_MS_LANGID_DHIVEHI_MALDIVES                  0x0465
-#define TT_MS_LANGID_HAUSA_NIGERIA                     0x0468
-#define TT_MS_LANGID_YORUBA_NIGERIA                    0x046A
-#define TT_MS_LANGID_QUECHUA_BOLIVIA                   0x046B
-#define TT_MS_LANGID_QUECHUA_ECUADOR                   0x086B
-#define TT_MS_LANGID_QUECHUA_PERU                      0x0C6B
-#define TT_MS_LANGID_SESOTHO_SA_LEBOA_SOUTH_AFRICA     0x046C
-#define TT_MS_LANGID_BASHKIR_RUSSIA                    0x046D
-#define TT_MS_LANGID_LUXEMBOURGISH_LUXEMBOURG          0x046E
-#define TT_MS_LANGID_GREENLANDIC_GREENLAND             0x046F
-#define TT_MS_LANGID_IGBO_NIGERIA                      0x0470
-#define TT_MS_LANGID_YI_PRC                            0x0478
-#define TT_MS_LANGID_MAPUDUNGUN_CHILE                  0x047A
-#define TT_MS_LANGID_MOHAWK_MOHAWK                     0x047C
-#define TT_MS_LANGID_BRETON_FRANCE                     0x047E
-#define TT_MS_LANGID_UIGHUR_PRC                        0x0480
-#define TT_MS_LANGID_MAORI_NEW_ZEALAND                 0x0481
-#define TT_MS_LANGID_OCCITAN_FRANCE                    0x0482
-#define TT_MS_LANGID_CORSICAN_FRANCE                   0x0483
-#define TT_MS_LANGID_ALSATIAN_FRANCE                   0x0484
-#define TT_MS_LANGID_YAKUT_RUSSIA                      0x0485
-#define TT_MS_LANGID_KICHE_GUATEMALA                   0x0486
-#define TT_MS_LANGID_KINYARWANDA_RWANDA                0x0487
-#define TT_MS_LANGID_WOLOF_SENEGAL                     0x0488
-#define TT_MS_LANGID_DARI_AFGHANISTAN                  0x048C
-
-
- -

Possible values of the language identifier field in the name records of the SFNT ‘name’ table if the ‘platform’ identifier code is TT_PLATFORM_MICROSOFT. These values are also used as return values for function FT_Get_CMap_Language_ID.

-

The canonical source for Microsoft's IDs is

-

https://docs.microsoft.com/en-us/windows/desktop/Intl/language-identifier-constants-and-strings ,

-

however, we only provide macros for language identifiers present in the OpenType specification: Microsoft has abandoned the concept of LCIDs (language code identifiers), and format 1 of the ‘name’ table provides a better mechanism for languages not covered here.

-

More legacy values not listed in the reference can be found in the FT_TRUETYPE_IDS_H header file.

-
- -

TT_NAME_ID_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-#define TT_NAME_ID_COPYRIGHT              0
-#define TT_NAME_ID_FONT_FAMILY            1
-#define TT_NAME_ID_FONT_SUBFAMILY         2
-#define TT_NAME_ID_UNIQUE_ID              3
-#define TT_NAME_ID_FULL_NAME              4
-#define TT_NAME_ID_VERSION_STRING         5
-#define TT_NAME_ID_PS_NAME                6
-#define TT_NAME_ID_TRADEMARK              7
-
-  /* the following values are from the OpenType spec */
-#define TT_NAME_ID_MANUFACTURER           8
-#define TT_NAME_ID_DESIGNER               9
-#define TT_NAME_ID_DESCRIPTION            10
-#define TT_NAME_ID_VENDOR_URL             11
-#define TT_NAME_ID_DESIGNER_URL           12
-#define TT_NAME_ID_LICENSE                13
-#define TT_NAME_ID_LICENSE_URL            14
-  /* number 15 is reserved */
-#define TT_NAME_ID_TYPOGRAPHIC_FAMILY     16
-#define TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY  17
-#define TT_NAME_ID_MAC_FULL_NAME          18
-
-  /* The following code is new as of 2000-01-21 */
-#define TT_NAME_ID_SAMPLE_TEXT            19
-
-  /* This is new in OpenType 1.3 */
-#define TT_NAME_ID_CID_FINDFONT_NAME      20
-
-  /* This is new in OpenType 1.5 */
-#define TT_NAME_ID_WWS_FAMILY             21
-#define TT_NAME_ID_WWS_SUBFAMILY          22
-
-  /* This is new in OpenType 1.7 */
-#define TT_NAME_ID_LIGHT_BACKGROUND       23
-#define TT_NAME_ID_DARK_BACKGROUND        24
-
-  /* This is new in OpenType 1.8 */
-#define TT_NAME_ID_VARIATIONS_PREFIX      25
-
-  /* these two values are deprecated */
-#define TT_NAME_ID_PREFERRED_FAMILY     TT_NAME_ID_TYPOGRAPHIC_FAMILY
-#define TT_NAME_ID_PREFERRED_SUBFAMILY  TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY
-
-
- -

Possible values of the ‘name’ identifier field in the name records of an SFNT ‘name’ table. These values are platform independent.

-
- -

TT_UCR_XXX

-

Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h).

-
-
-  /* ulUnicodeRange1 */
-  /* --------------- */
-
-  /* Bit  0   Basic Latin */
-#define TT_UCR_BASIC_LATIN                     (1L <<  0) /* U+0020-U+007E */
-  /* Bit  1   C1 Controls and Latin-1 Supplement */
-#define TT_UCR_LATIN1_SUPPLEMENT               (1L <<  1) /* U+0080-U+00FF */
-  /* Bit  2   Latin Extended-A */
-#define TT_UCR_LATIN_EXTENDED_A                (1L <<  2) /* U+0100-U+017F */
-  /* Bit  3   Latin Extended-B */
-#define TT_UCR_LATIN_EXTENDED_B                (1L <<  3) /* U+0180-U+024F */
-  /* Bit  4   IPA Extensions                 */
-  /*          Phonetic Extensions            */
-  /*          Phonetic Extensions Supplement */
-#define TT_UCR_IPA_EXTENSIONS                  (1L <<  4) /* U+0250-U+02AF */
-                                                          /* U+1D00-U+1D7F */
-                                                          /* U+1D80-U+1DBF */
-  /* Bit  5   Spacing Modifier Letters */
-  /*          Modifier Tone Letters    */
-#define TT_UCR_SPACING_MODIFIER                (1L <<  5) /* U+02B0-U+02FF */
-                                                          /* U+A700-U+A71F */
-  /* Bit  6   Combining Diacritical Marks            */
-  /*          Combining Diacritical Marks Supplement */
-#define TT_UCR_COMBINING_DIACRITICAL_MARKS     (1L <<  6) /* U+0300-U+036F */
-                                                          /* U+1DC0-U+1DFF */
-  /* Bit  7   Greek and Coptic */
-#define TT_UCR_GREEK                           (1L <<  7) /* U+0370-U+03FF */
-  /* Bit  8   Coptic */
-#define TT_UCR_COPTIC                          (1L <<  8) /* U+2C80-U+2CFF */
-  /* Bit  9   Cyrillic            */
-  /*          Cyrillic Supplement */
-  /*          Cyrillic Extended-A */
-  /*          Cyrillic Extended-B */
-#define TT_UCR_CYRILLIC                        (1L <<  9) /* U+0400-U+04FF */
-                                                          /* U+0500-U+052F */
-                                                          /* U+2DE0-U+2DFF */
-                                                          /* U+A640-U+A69F */
-  /* Bit 10   Armenian */
-#define TT_UCR_ARMENIAN                        (1L << 10) /* U+0530-U+058F */
-  /* Bit 11   Hebrew */
-#define TT_UCR_HEBREW                          (1L << 11) /* U+0590-U+05FF */
-  /* Bit 12   Vai */
-#define TT_UCR_VAI                             (1L << 12) /* U+A500-U+A63F */
-  /* Bit 13   Arabic            */
-  /*          Arabic Supplement */
-#define TT_UCR_ARABIC                          (1L << 13) /* U+0600-U+06FF */
-                                                          /* U+0750-U+077F */
-  /* Bit 14   NKo */
-#define TT_UCR_NKO                             (1L << 14) /* U+07C0-U+07FF */
-  /* Bit 15   Devanagari */
-#define TT_UCR_DEVANAGARI                      (1L << 15) /* U+0900-U+097F */
-  /* Bit 16   Bengali */
-#define TT_UCR_BENGALI                         (1L << 16) /* U+0980-U+09FF */
-  /* Bit 17   Gurmukhi */
-#define TT_UCR_GURMUKHI                        (1L << 17) /* U+0A00-U+0A7F */
-  /* Bit 18   Gujarati */
-#define TT_UCR_GUJARATI                        (1L << 18) /* U+0A80-U+0AFF */
-  /* Bit 19   Oriya */
-#define TT_UCR_ORIYA                           (1L << 19) /* U+0B00-U+0B7F */
-  /* Bit 20   Tamil */
-#define TT_UCR_TAMIL                           (1L << 20) /* U+0B80-U+0BFF */
-  /* Bit 21   Telugu */
-#define TT_UCR_TELUGU                          (1L << 21) /* U+0C00-U+0C7F */
-  /* Bit 22   Kannada */
-#define TT_UCR_KANNADA                         (1L << 22) /* U+0C80-U+0CFF */
-  /* Bit 23   Malayalam */
-#define TT_UCR_MALAYALAM                       (1L << 23) /* U+0D00-U+0D7F */
-  /* Bit 24   Thai */
-#define TT_UCR_THAI                            (1L << 24) /* U+0E00-U+0E7F */
-  /* Bit 25   Lao */
-#define TT_UCR_LAO                             (1L << 25) /* U+0E80-U+0EFF */
-  /* Bit 26   Georgian            */
-  /*          Georgian Supplement */
-#define TT_UCR_GEORGIAN                        (1L << 26) /* U+10A0-U+10FF */
-                                                          /* U+2D00-U+2D2F */
-  /* Bit 27   Balinese */
-#define TT_UCR_BALINESE                        (1L << 27) /* U+1B00-U+1B7F */
-  /* Bit 28   Hangul Jamo */
-#define TT_UCR_HANGUL_JAMO                     (1L << 28) /* U+1100-U+11FF */
-  /* Bit 29   Latin Extended Additional */
-  /*          Latin Extended-C          */
-  /*          Latin Extended-D          */
-#define TT_UCR_LATIN_EXTENDED_ADDITIONAL       (1L << 29) /* U+1E00-U+1EFF */
-                                                          /* U+2C60-U+2C7F */
-                                                          /* U+A720-U+A7FF */
-  /* Bit 30   Greek Extended */
-#define TT_UCR_GREEK_EXTENDED                  (1L << 30) /* U+1F00-U+1FFF */
-  /* Bit 31   General Punctuation      */
-  /*          Supplemental Punctuation */
-#define TT_UCR_GENERAL_PUNCTUATION             (1L << 31) /* U+2000-U+206F */
-                                                          /* U+2E00-U+2E7F */
-
-  /* ulUnicodeRange2 */
-  /* --------------- */
-
-  /* Bit 32   Superscripts And Subscripts */
-#define TT_UCR_SUPERSCRIPTS_SUBSCRIPTS         (1L <<  0) /* U+2070-U+209F */
-  /* Bit 33   Currency Symbols */
-#define TT_UCR_CURRENCY_SYMBOLS                (1L <<  1) /* U+20A0-U+20CF */
-  /* Bit 34   Combining Diacritical Marks For Symbols */
-#define TT_UCR_COMBINING_DIACRITICAL_MARKS_SYMB \
-                                               (1L <<  2) /* U+20D0-U+20FF */
-  /* Bit 35   Letterlike Symbols */
-#define TT_UCR_LETTERLIKE_SYMBOLS              (1L <<  3) /* U+2100-U+214F */
-  /* Bit 36   Number Forms */
-#define TT_UCR_NUMBER_FORMS                    (1L <<  4) /* U+2150-U+218F */
-  /* Bit 37   Arrows                           */
-  /*          Supplemental Arrows-A            */
-  /*          Supplemental Arrows-B            */
-  /*          Miscellaneous Symbols and Arrows */
-#define TT_UCR_ARROWS                          (1L <<  5) /* U+2190-U+21FF */
-                                                          /* U+27F0-U+27FF */
-                                                          /* U+2900-U+297F */
-                                                          /* U+2B00-U+2BFF */
-  /* Bit 38   Mathematical Operators               */
-  /*          Supplemental Mathematical Operators  */
-  /*          Miscellaneous Mathematical Symbols-A */
-  /*          Miscellaneous Mathematical Symbols-B */
-#define TT_UCR_MATHEMATICAL_OPERATORS          (1L <<  6) /* U+2200-U+22FF */
-                                                          /* U+2A00-U+2AFF */
-                                                          /* U+27C0-U+27EF */
-                                                          /* U+2980-U+29FF */
-  /* Bit 39 Miscellaneous Technical */
-#define TT_UCR_MISCELLANEOUS_TECHNICAL         (1L <<  7) /* U+2300-U+23FF */
-  /* Bit 40   Control Pictures */
-#define TT_UCR_CONTROL_PICTURES                (1L <<  8) /* U+2400-U+243F */
-  /* Bit 41   Optical Character Recognition */
-#define TT_UCR_OCR                             (1L <<  9) /* U+2440-U+245F */
-  /* Bit 42   Enclosed Alphanumerics */
-#define TT_UCR_ENCLOSED_ALPHANUMERICS          (1L << 10) /* U+2460-U+24FF */
-  /* Bit 43   Box Drawing */
-#define TT_UCR_BOX_DRAWING                     (1L << 11) /* U+2500-U+257F */
-  /* Bit 44   Block Elements */
-#define TT_UCR_BLOCK_ELEMENTS                  (1L << 12) /* U+2580-U+259F */
-  /* Bit 45   Geometric Shapes */
-#define TT_UCR_GEOMETRIC_SHAPES                (1L << 13) /* U+25A0-U+25FF */
-  /* Bit 46   Miscellaneous Symbols */
-#define TT_UCR_MISCELLANEOUS_SYMBOLS           (1L << 14) /* U+2600-U+26FF */
-  /* Bit 47   Dingbats */
-#define TT_UCR_DINGBATS                        (1L << 15) /* U+2700-U+27BF */
-  /* Bit 48   CJK Symbols and Punctuation */
-#define TT_UCR_CJK_SYMBOLS                     (1L << 16) /* U+3000-U+303F */
-  /* Bit 49   Hiragana */
-#define TT_UCR_HIRAGANA                        (1L << 17) /* U+3040-U+309F */
-  /* Bit 50   Katakana                     */
-  /*          Katakana Phonetic Extensions */
-#define TT_UCR_KATAKANA                        (1L << 18) /* U+30A0-U+30FF */
-                                                          /* U+31F0-U+31FF */
-  /* Bit 51   Bopomofo          */
-  /*          Bopomofo Extended */
-#define TT_UCR_BOPOMOFO                        (1L << 19) /* U+3100-U+312F */
-                                                          /* U+31A0-U+31BF */
-  /* Bit 52   Hangul Compatibility Jamo */
-#define TT_UCR_HANGUL_COMPATIBILITY_JAMO       (1L << 20) /* U+3130-U+318F */
-  /* Bit 53   Phags-Pa */
-#define TT_UCR_CJK_MISC                        (1L << 21) /* U+A840-U+A87F */
-#define TT_UCR_KANBUN  TT_UCR_CJK_MISC /* deprecated */
-#define TT_UCR_PHAGSPA
-  /* Bit 54   Enclosed CJK Letters and Months */
-#define TT_UCR_ENCLOSED_CJK_LETTERS_MONTHS     (1L << 22) /* U+3200-U+32FF */
-  /* Bit 55   CJK Compatibility */
-#define TT_UCR_CJK_COMPATIBILITY               (1L << 23) /* U+3300-U+33FF */
-  /* Bit 56   Hangul Syllables */
-#define TT_UCR_HANGUL                          (1L << 24) /* U+AC00-U+D7A3 */
-  /* Bit 57   High Surrogates              */
-  /*          High Private Use Surrogates  */
-  /*          Low Surrogates               */
-
-  /* According to OpenType specs v.1.3+,   */
-  /* setting bit 57 implies that there is  */
-  /* at least one codepoint beyond the     */
-  /* Basic Multilingual Plane that is      */
-  /* supported by this font.  So it really */
-  /* means >= U+10000.                     */
-#define TT_UCR_SURROGATES                      (1L << 25) /* U+D800-U+DB7F */
-                                                          /* U+DB80-U+DBFF */
-                                                          /* U+DC00-U+DFFF */
-#define TT_UCR_NON_PLANE_0  TT_UCR_SURROGATES
-  /* Bit 58  Phoenician */
-#define TT_UCR_PHOENICIAN                      (1L << 26) /*U+10900-U+1091F*/
-  /* Bit 59   CJK Unified Ideographs             */
-  /*          CJK Radicals Supplement            */
-  /*          Kangxi Radicals                    */
-  /*          Ideographic Description Characters */
-  /*          CJK Unified Ideographs Extension A */
-  /*          CJK Unified Ideographs Extension B */
-  /*          Kanbun                             */
-#define TT_UCR_CJK_UNIFIED_IDEOGRAPHS          (1L << 27) /* U+4E00-U+9FFF */
-                                                          /* U+2E80-U+2EFF */
-                                                          /* U+2F00-U+2FDF */
-                                                          /* U+2FF0-U+2FFF */
-                                                          /* U+3400-U+4DB5 */
-                                                          /*U+20000-U+2A6DF*/
-                                                          /* U+3190-U+319F */
-  /* Bit 60   Private Use */
-#define TT_UCR_PRIVATE_USE                     (1L << 28) /* U+E000-U+F8FF */
-  /* Bit 61   CJK Strokes                             */
-  /*          CJK Compatibility Ideographs            */
-  /*          CJK Compatibility Ideographs Supplement */
-#define TT_UCR_CJK_COMPATIBILITY_IDEOGRAPHS    (1L << 29) /* U+31C0-U+31EF */
-                                                          /* U+F900-U+FAFF */
-                                                          /*U+2F800-U+2FA1F*/
-  /* Bit 62   Alphabetic Presentation Forms */
-#define TT_UCR_ALPHABETIC_PRESENTATION_FORMS   (1L << 30) /* U+FB00-U+FB4F */
-  /* Bit 63   Arabic Presentation Forms-A */
-#define TT_UCR_ARABIC_PRESENTATION_FORMS_A     (1L << 31) /* U+FB50-U+FDFF */
-
-  /* ulUnicodeRange3 */
-  /* --------------- */
-
-  /* Bit 64   Combining Half Marks */
-#define TT_UCR_COMBINING_HALF_MARKS            (1L <<  0) /* U+FE20-U+FE2F */
-  /* Bit 65   Vertical forms          */
-  /*          CJK Compatibility Forms */
-#define TT_UCR_CJK_COMPATIBILITY_FORMS         (1L <<  1) /* U+FE10-U+FE1F */
-                                                          /* U+FE30-U+FE4F */
-  /* Bit 66   Small Form Variants */
-#define TT_UCR_SMALL_FORM_VARIANTS             (1L <<  2) /* U+FE50-U+FE6F */
-  /* Bit 67   Arabic Presentation Forms-B */
-#define TT_UCR_ARABIC_PRESENTATION_FORMS_B     (1L <<  3) /* U+FE70-U+FEFE */
-  /* Bit 68   Halfwidth and Fullwidth Forms */
-#define TT_UCR_HALFWIDTH_FULLWIDTH_FORMS       (1L <<  4) /* U+FF00-U+FFEF */
-  /* Bit 69   Specials */
-#define TT_UCR_SPECIALS                        (1L <<  5) /* U+FFF0-U+FFFD */
-  /* Bit 70   Tibetan */
-#define TT_UCR_TIBETAN                         (1L <<  6) /* U+0F00-U+0FFF */
-  /* Bit 71   Syriac */
-#define TT_UCR_SYRIAC                          (1L <<  7) /* U+0700-U+074F */
-  /* Bit 72   Thaana */
-#define TT_UCR_THAANA                          (1L <<  8) /* U+0780-U+07BF */
-  /* Bit 73   Sinhala */
-#define TT_UCR_SINHALA                         (1L <<  9) /* U+0D80-U+0DFF */
-  /* Bit 74   Myanmar */
-#define TT_UCR_MYANMAR                         (1L << 10) /* U+1000-U+109F */
-  /* Bit 75   Ethiopic            */
-  /*          Ethiopic Supplement */
-  /*          Ethiopic Extended   */
-#define TT_UCR_ETHIOPIC                        (1L << 11) /* U+1200-U+137F */
-                                                          /* U+1380-U+139F */
-                                                          /* U+2D80-U+2DDF */
-  /* Bit 76   Cherokee */
-#define TT_UCR_CHEROKEE                        (1L << 12) /* U+13A0-U+13FF */
-  /* Bit 77   Unified Canadian Aboriginal Syllabics */
-#define TT_UCR_CANADIAN_ABORIGINAL_SYLLABICS   (1L << 13) /* U+1400-U+167F */
-  /* Bit 78   Ogham */
-#define TT_UCR_OGHAM                           (1L << 14) /* U+1680-U+169F */
-  /* Bit 79   Runic */
-#define TT_UCR_RUNIC                           (1L << 15) /* U+16A0-U+16FF */
-  /* Bit 80   Khmer         */
-  /*          Khmer Symbols */
-#define TT_UCR_KHMER                           (1L << 16) /* U+1780-U+17FF */
-                                                          /* U+19E0-U+19FF */
-  /* Bit 81   Mongolian */
-#define TT_UCR_MONGOLIAN                       (1L << 17) /* U+1800-U+18AF */
-  /* Bit 82   Braille Patterns */
-#define TT_UCR_BRAILLE                         (1L << 18) /* U+2800-U+28FF */
-  /* Bit 83   Yi Syllables */
-  /*          Yi Radicals  */
-#define TT_UCR_YI                              (1L << 19) /* U+A000-U+A48F */
-                                                          /* U+A490-U+A4CF */
-  /* Bit 84   Tagalog  */
-  /*          Hanunoo  */
-  /*          Buhid    */
-  /*          Tagbanwa */
-#define TT_UCR_PHILIPPINE                      (1L << 20) /* U+1700-U+171F */
-                                                          /* U+1720-U+173F */
-                                                          /* U+1740-U+175F */
-                                                          /* U+1760-U+177F */
-  /* Bit 85   Old Italic */
-#define TT_UCR_OLD_ITALIC                      (1L << 21) /*U+10300-U+1032F*/
-  /* Bit 86   Gothic */
-#define TT_UCR_GOTHIC                          (1L << 22) /*U+10330-U+1034F*/
-  /* Bit 87   Deseret */
-#define TT_UCR_DESERET                         (1L << 23) /*U+10400-U+1044F*/
-  /* Bit 88   Byzantine Musical Symbols      */
-  /*          Musical Symbols                */
-  /*          Ancient Greek Musical Notation */
-#define TT_UCR_MUSICAL_SYMBOLS                 (1L << 24) /*U+1D000-U+1D0FF*/
-                                                          /*U+1D100-U+1D1FF*/
-                                                          /*U+1D200-U+1D24F*/
-  /* Bit 89   Mathematical Alphanumeric Symbols */
-#define TT_UCR_MATH_ALPHANUMERIC_SYMBOLS       (1L << 25) /*U+1D400-U+1D7FF*/
-  /* Bit 90   Private Use (plane 15) */
-  /*          Private Use (plane 16) */
-#define TT_UCR_PRIVATE_USE_SUPPLEMENTARY       (1L << 26) /*U+F0000-U+FFFFD*/
-                                                        /*U+100000-U+10FFFD*/
-  /* Bit 91   Variation Selectors            */
-  /*          Variation Selectors Supplement */
-#define TT_UCR_VARIATION_SELECTORS             (1L << 27) /* U+FE00-U+FE0F */
-                                                          /*U+E0100-U+E01EF*/
-  /* Bit 92   Tags */
-#define TT_UCR_TAGS                            (1L << 28) /*U+E0000-U+E007F*/
-  /* Bit 93   Limbu */
-#define TT_UCR_LIMBU                           (1L << 29) /* U+1900-U+194F */
-  /* Bit 94   Tai Le */
-#define TT_UCR_TAI_LE                          (1L << 30) /* U+1950-U+197F */
-  /* Bit 95   New Tai Lue */
-#define TT_UCR_NEW_TAI_LUE                     (1L << 31) /* U+1980-U+19DF */
-
-  /* ulUnicodeRange4 */
-  /* --------------- */
-
-  /* Bit 96   Buginese */
-#define TT_UCR_BUGINESE                        (1L <<  0) /* U+1A00-U+1A1F */
-  /* Bit 97   Glagolitic */
-#define TT_UCR_GLAGOLITIC                      (1L <<  1) /* U+2C00-U+2C5F */
-  /* Bit 98   Tifinagh */
-#define TT_UCR_TIFINAGH                        (1L <<  2) /* U+2D30-U+2D7F */
-  /* Bit 99   Yijing Hexagram Symbols */
-#define TT_UCR_YIJING                          (1L <<  3) /* U+4DC0-U+4DFF */
-  /* Bit 100  Syloti Nagri */
-#define TT_UCR_SYLOTI_NAGRI                    (1L <<  4) /* U+A800-U+A82F */
-  /* Bit 101  Linear B Syllabary */
-  /*          Linear B Ideograms */
-  /*          Aegean Numbers     */
-#define TT_UCR_LINEAR_B                        (1L <<  5) /*U+10000-U+1007F*/
-                                                          /*U+10080-U+100FF*/
-                                                          /*U+10100-U+1013F*/
-  /* Bit 102  Ancient Greek Numbers */
-#define TT_UCR_ANCIENT_GREEK_NUMBERS           (1L <<  6) /*U+10140-U+1018F*/
-  /* Bit 103  Ugaritic */
-#define TT_UCR_UGARITIC                        (1L <<  7) /*U+10380-U+1039F*/
-  /* Bit 104  Old Persian */
-#define TT_UCR_OLD_PERSIAN                     (1L <<  8) /*U+103A0-U+103DF*/
-  /* Bit 105  Shavian */
-#define TT_UCR_SHAVIAN                         (1L <<  9) /*U+10450-U+1047F*/
-  /* Bit 106  Osmanya */
-#define TT_UCR_OSMANYA                         (1L << 10) /*U+10480-U+104AF*/
-  /* Bit 107  Cypriot Syllabary */
-#define TT_UCR_CYPRIOT_SYLLABARY               (1L << 11) /*U+10800-U+1083F*/
-  /* Bit 108  Kharoshthi */
-#define TT_UCR_KHAROSHTHI                      (1L << 12) /*U+10A00-U+10A5F*/
-  /* Bit 109  Tai Xuan Jing Symbols */
-#define TT_UCR_TAI_XUAN_JING                   (1L << 13) /*U+1D300-U+1D35F*/
-  /* Bit 110  Cuneiform                         */
-  /*          Cuneiform Numbers and Punctuation */
-#define TT_UCR_CUNEIFORM                       (1L << 14) /*U+12000-U+123FF*/
-                                                          /*U+12400-U+1247F*/
-  /* Bit 111  Counting Rod Numerals */
-#define TT_UCR_COUNTING_ROD_NUMERALS           (1L << 15) /*U+1D360-U+1D37F*/
-  /* Bit 112  Sundanese */
-#define TT_UCR_SUNDANESE                       (1L << 16) /* U+1B80-U+1BBF */
-  /* Bit 113  Lepcha */
-#define TT_UCR_LEPCHA                          (1L << 17) /* U+1C00-U+1C4F */
-  /* Bit 114  Ol Chiki */
-#define TT_UCR_OL_CHIKI                        (1L << 18) /* U+1C50-U+1C7F */
-  /* Bit 115  Saurashtra */
-#define TT_UCR_SAURASHTRA                      (1L << 19) /* U+A880-U+A8DF */
-  /* Bit 116  Kayah Li */
-#define TT_UCR_KAYAH_LI                        (1L << 20) /* U+A900-U+A92F */
-  /* Bit 117  Rejang */
-#define TT_UCR_REJANG                          (1L << 21) /* U+A930-U+A95F */
-  /* Bit 118  Cham */
-#define TT_UCR_CHAM                            (1L << 22) /* U+AA00-U+AA5F */
-  /* Bit 119  Ancient Symbols */
-#define TT_UCR_ANCIENT_SYMBOLS                 (1L << 23) /*U+10190-U+101CF*/
-  /* Bit 120  Phaistos Disc */
-#define TT_UCR_PHAISTOS_DISC                   (1L << 24) /*U+101D0-U+101FF*/
-  /* Bit 121  Carian */
-  /*          Lycian */
-  /*          Lydian */
-#define TT_UCR_OLD_ANATOLIAN                   (1L << 25) /*U+102A0-U+102DF*/
-                                                          /*U+10280-U+1029F*/
-                                                          /*U+10920-U+1093F*/
-  /* Bit 122  Domino Tiles  */
-  /*          Mahjong Tiles */
-#define TT_UCR_GAME_TILES                      (1L << 26) /*U+1F030-U+1F09F*/
-                                                          /*U+1F000-U+1F02F*/
-  /* Bit 123-127 Reserved for process-internal usage */
-
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Possible bit mask values for the ulUnicodeRangeX fields in an SFNT ‘OS/2’ table.

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FreeType » Docs » Controlling FreeType Modules » The TrueType driver

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The TrueType driver

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Synopsis

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While FreeType's TrueType driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get. The following lists the available properties together with the necessary macros and structures.

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The TrueType driver's module name is ‘truetype’.

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A single property interpreter-version is available, as documented in the ‘Driver properties’ section.

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We start with a list of definitions, kindly provided by Greg Hitchcock.

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Bi-Level Rendering

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Monochromatic rendering, exclusively used in the early days of TrueType by both Apple and Microsoft. Microsoft's GDI interface supported hinting of the right-side bearing point, such that the advance width could be non-linear. Most often this was done to achieve some level of glyph symmetry. To enable reasonable performance (e.g., not having to run hinting on all glyphs just to get the widths) there was a bit in the head table indicating if the side bearing was hinted, and additional tables, ‘hdmx’ and ‘LTSH’, to cache hinting widths across multiple sizes and device aspect ratios.

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Font Smoothing

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Microsoft's GDI implementation of anti-aliasing. Not traditional anti-aliasing as the outlines were hinted before the sampling. The widths matched the bi-level rendering.

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ClearType Rendering

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Technique that uses physical subpixels to improve rendering on LCD (and other) displays. Because of the higher resolution, many methods of improving symmetry in glyphs through hinting the right-side bearing were no longer necessary. This lead to what GDI calls ‘natural widths’ ClearType, see http://rastertragedy.com/RTRCh4.htm#Sec21. Since hinting has extra resolution, most non-linearity went away, but it is still possible for hints to change the advance widths in this mode.

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ClearType Compatible Widths

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One of the earliest challenges with ClearType was allowing the implementation in GDI to be selected without requiring all UI and documents to reflow. To address this, a compatible method of rendering ClearType was added where the font hints are executed once to determine the width in bi-level rendering, and then re-run in ClearType, with the difference in widths being absorbed in the font hints for ClearType (mostly in the white space of hints); see http://rastertragedy.com/RTRCh4.htm#Sec20. Somewhat by definition, compatible width ClearType allows for non-linear widths, but only when the bi-level version has non-linear widths.

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ClearType Subpixel Positioning

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One of the nice benefits of ClearType is the ability to more crisply display fractional widths; unfortunately, the GDI model of integer bitmaps did not support this. However, the WPF and Direct Write frameworks do support fractional widths. DWrite calls this ‘natural mode’, not to be confused with GDI's ‘natural widths’. Subpixel positioning, in the current implementation of Direct Write, unfortunately does not support hinted advance widths, see http://rastertragedy.com/RTRCh4.htm#Sec22. Note that the TrueType interpreter fully allows the advance width to be adjusted in this mode, just the DWrite client will ignore those changes.

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ClearType Backward Compatibility

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This is a set of exceptions made in the TrueType interpreter to minimize hinting techniques that were problematic with the extra resolution of ClearType; see http://rastertragedy.com/RTRCh4.htm#Sec1 and https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx. This technique is not to be confused with ClearType compatible widths. ClearType backward compatibility has no direct impact on changing advance widths, but there might be an indirect impact on disabling some deltas. This could be worked around in backward compatibility mode.

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Native ClearType Mode

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(Not to be confused with ‘natural widths’.) This mode removes all the exceptions in the TrueType interpreter when running with ClearType. Any issues on widths would still apply, though.

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FreeType » Docs » Format-Specific API » Type 1 Tables

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Type 1 Tables

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Synopsis

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This section contains the definition of Type 1-specific tables, including structures related to other PostScript font formats.

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PS_FontInfoRec

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct  PS_FontInfoRec_
-  {
-    FT_String*  version;
-    FT_String*  notice;
-    FT_String*  full_name;
-    FT_String*  family_name;
-    FT_String*  weight;
-    FT_Long     italic_angle;
-    FT_Bool     is_fixed_pitch;
-    FT_Short    underline_position;
-    FT_UShort   underline_thickness;
-
-  } PS_FontInfoRec;
-
-
- -

A structure used to model a Type 1 or Type 2 FontInfo dictionary. Note that for Multiple Master fonts, each instance has its own FontInfo dictionary.

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PS_FontInfo

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct PS_FontInfoRec_*  PS_FontInfo;
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- -

A handle to a PS_FontInfoRec structure.

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PS_PrivateRec

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct  PS_PrivateRec_
-  {
-    FT_Int     unique_id;
-    FT_Int     lenIV;
-
-    FT_Byte    num_blue_values;
-    FT_Byte    num_other_blues;
-    FT_Byte    num_family_blues;
-    FT_Byte    num_family_other_blues;
-
-    FT_Short   blue_values[14];
-    FT_Short   other_blues[10];
-
-    FT_Short   family_blues      [14];
-    FT_Short   family_other_blues[10];
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-    FT_Fixed   blue_scale;
-    FT_Int     blue_shift;
-    FT_Int     blue_fuzz;
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-    FT_UShort  standard_width[1];
-    FT_UShort  standard_height[1];
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-    FT_Byte    num_snap_widths;
-    FT_Byte    num_snap_heights;
-    FT_Bool    force_bold;
-    FT_Bool    round_stem_up;
-
-    FT_Short   snap_widths [13];  /* including std width  */
-    FT_Short   snap_heights[13];  /* including std height */
-
-    FT_Fixed   expansion_factor;
-
-    FT_Long    language_group;
-    FT_Long    password;
-
-    FT_Short   min_feature[2];
-
-  } PS_PrivateRec;
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-
- -

A structure used to model a Type 1 or Type 2 private dictionary. Note that for Multiple Master fonts, each instance has its own Private dictionary.

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PS_Private

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct PS_PrivateRec_*  PS_Private;
-
-
- -

A handle to a PS_PrivateRec structure.

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CID_FaceDictRec

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct  CID_FaceDictRec_
-  {
-    PS_PrivateRec  private_dict;
-
-    FT_UInt        len_buildchar;
-    FT_Fixed       forcebold_threshold;
-    FT_Pos         stroke_width;
-    FT_Fixed       expansion_factor;   /* this is a duplicate of           */
-                                       /* `private_dict->expansion_factor' */
-    FT_Byte        paint_type;
-    FT_Byte        font_type;
-    FT_Matrix      font_matrix;
-    FT_Vector      font_offset;
-
-    FT_UInt        num_subrs;
-    FT_ULong       subrmap_offset;
-    FT_Int         sd_bytes;
-
-  } CID_FaceDictRec;
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-
- -

A structure used to represent data in a CID top-level dictionary. In most cases, they are part of the font's ‘/FDArray’ array. Within a CID font file, such (internal) subfont dictionaries are enclosed by ‘%ADOBeginFontDict’ and ‘%ADOEndFontDict’ comments.

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Note that CID_FaceDictRec misses a field for the ‘/FontName’ keyword, specifying the subfont's name (the top-level font name is given by the ‘/CIDFontName’ keyword). This is an oversight, but it doesn't limit the ‘cid’ font module's functionality because FreeType neither needs this entry nor gives access to CID subfonts.

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CID_FaceDict

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct CID_FaceDictRec_*  CID_FaceDict;
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- -

A handle to a CID_FaceDictRec structure.

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CID_FaceInfoRec

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct  CID_FaceInfoRec_
-  {
-    FT_String*      cid_font_name;
-    FT_Fixed        cid_version;
-    FT_Int          cid_font_type;
-
-    FT_String*      registry;
-    FT_String*      ordering;
-    FT_Int          supplement;
-
-    PS_FontInfoRec  font_info;
-    FT_BBox         font_bbox;
-    FT_ULong        uid_base;
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-    FT_Int          num_xuid;
-    FT_ULong        xuid[16];
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-    FT_ULong        cidmap_offset;
-    FT_Int          fd_bytes;
-    FT_Int          gd_bytes;
-    FT_ULong        cid_count;
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-    FT_Int          num_dicts;
-    CID_FaceDict    font_dicts;
-
-    FT_ULong        data_offset;
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-  } CID_FaceInfoRec;
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-
- -

A structure used to represent CID Face information.

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CID_FaceInfo

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-  typedef struct CID_FaceInfoRec_*  CID_FaceInfo;
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- -

A handle to a CID_FaceInfoRec structure.

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FT_Has_PS_Glyph_Names

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-
-  FT_EXPORT( FT_Int )
-  FT_Has_PS_Glyph_Names( FT_Face  face );
-
-
- -

Return true if a given face provides reliable PostScript glyph names. This is similar to using the FT_HAS_GLYPH_NAMES macro, except that certain fonts (mostly TrueType) contain incorrect glyph name tables.

-

When this function returns true, the caller is sure that the glyph names returned by FT_Get_Glyph_Name are reliable.

-

input

- - - -
face -

face handle

-
- -

return

- -

Boolean. True if glyph names are reliable.

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- -

FT_Get_PS_Font_Info

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-
-  FT_EXPORT( FT_Error )
-  FT_Get_PS_Font_Info( FT_Face      face,
-                       PS_FontInfo  afont_info );
-
-
- -

Retrieve the PS_FontInfoRec structure corresponding to a given PostScript font.

-

input

- - - -
face -

PostScript face handle.

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- -

output

- - - -
afont_info -

Output font info structure pointer.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

String pointers within the PS_FontInfoRec structure are owned by the face and don't need to be freed by the caller. Missing entries in the font's FontInfo dictionary are represented by NULL pointers.

-

If the font's format is not PostScript-based, this function will return the FT_Err_Invalid_Argument error code.

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FT_Get_PS_Font_Private

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-
-  FT_EXPORT( FT_Error )
-  FT_Get_PS_Font_Private( FT_Face     face,
-                          PS_Private  afont_private );
-
-
- -

Retrieve the PS_PrivateRec structure corresponding to a given PostScript font.

-

input

- - - -
face -

PostScript face handle.

-
- -

output

- - - -
afont_private -

Output private dictionary structure pointer.

-
- -

return

- -

FreeType error code. 0 means success.

-

note

- -

The string pointers within the PS_PrivateRec structure are owned by the face and don't need to be freed by the caller.

-

If the font's format is not PostScript-based, this function returns the FT_Err_Invalid_Argument error code.

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FT_Get_PS_Font_Value

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Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

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-
-  FT_EXPORT( FT_Long )
-  FT_Get_PS_Font_Value( FT_Face       face,
-                        PS_Dict_Keys  key,
-                        FT_UInt       idx,
-                        void         *value,
-                        FT_Long       value_len );
-
-
- -

Retrieve the value for the supplied key from a PostScript font.

-

input

- - - - - - - -
face -

PostScript face handle.

-
key -

An enumeration value representing the dictionary key to retrieve.

-
idx -

For array values, this specifies the index to be returned.

-
value -

A pointer to memory into which to write the value.

-
valen_len -

The size, in bytes, of the memory supplied for the value.

-
- -

output

- - - -
value -

The value matching the above key, if it exists.

-
- -

return

- -

The amount of memory (in bytes) required to hold the requested value (if it exists, -1 otherwise).

-

note

- -

The values returned are not pointers into the internal structures of the face, but are ‘fresh’ copies, so that the memory containing them belongs to the calling application. This also enforces the ‘read-only’ nature of these values, i.e., this function cannot be used to manipulate the face.

-

value is a void pointer because the values returned can be of various types.

-

If either value is NULL or value_len is too small, just the required memory size for the requested entry is returned.

-

The idx parameter is used, not only to retrieve elements of, for example, the FontMatrix or FontBBox, but also to retrieve name keys from the CharStrings dictionary, and the charstrings themselves. It is ignored for atomic values.

-

PS_DICT_BLUE_SCALE returns a value that is scaled up by 1000. To get the value as in the font stream, you need to divide by 65536000.0 (to remove the FT_Fixed scale, and the x1000 scale).

-

IMPORTANT: Only key/value pairs read by the FreeType interpreter can be retrieved. So, for example, PostScript procedures such as NP, ND, and RD are not available. Arbitrary keys are, obviously, not be available either.

-

If the font's format is not PostScript-based, this function returns the FT_Err_Invalid_Argument error code.

-

since

- -

2.4.8

-
- -

T1_Blend_Flags

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef enum  T1_Blend_Flags_
-  {
-    /* required fields in a FontInfo blend dictionary */
-    T1_BLEND_UNDERLINE_POSITION = 0,
-    T1_BLEND_UNDERLINE_THICKNESS,
-    T1_BLEND_ITALIC_ANGLE,
-
-    /* required fields in a Private blend dictionary */
-    T1_BLEND_BLUE_VALUES,
-    T1_BLEND_OTHER_BLUES,
-    T1_BLEND_STANDARD_WIDTH,
-    T1_BLEND_STANDARD_HEIGHT,
-    T1_BLEND_STEM_SNAP_WIDTHS,
-    T1_BLEND_STEM_SNAP_HEIGHTS,
-    T1_BLEND_BLUE_SCALE,
-    T1_BLEND_BLUE_SHIFT,
-    T1_BLEND_FAMILY_BLUES,
-    T1_BLEND_FAMILY_OTHER_BLUES,
-    T1_BLEND_FORCE_BOLD,
-
-    T1_BLEND_MAX    /* do not remove */
-
-  } T1_Blend_Flags;
-
-
-  /* these constants are deprecated; use the corresponding */
-  /* `T1_Blend_Flags` values instead                       */
-#define t1_blend_underline_position   T1_BLEND_UNDERLINE_POSITION
-#define t1_blend_underline_thickness  T1_BLEND_UNDERLINE_THICKNESS
-#define t1_blend_italic_angle         T1_BLEND_ITALIC_ANGLE
-#define t1_blend_blue_values          T1_BLEND_BLUE_VALUES
-#define t1_blend_other_blues          T1_BLEND_OTHER_BLUES
-#define t1_blend_standard_widths      T1_BLEND_STANDARD_WIDTH
-#define t1_blend_standard_height      T1_BLEND_STANDARD_HEIGHT
-#define t1_blend_stem_snap_widths     T1_BLEND_STEM_SNAP_WIDTHS
-#define t1_blend_stem_snap_heights    T1_BLEND_STEM_SNAP_HEIGHTS
-#define t1_blend_blue_scale           T1_BLEND_BLUE_SCALE
-#define t1_blend_blue_shift           T1_BLEND_BLUE_SHIFT
-#define t1_blend_family_blues         T1_BLEND_FAMILY_BLUES
-#define t1_blend_family_other_blues   T1_BLEND_FAMILY_OTHER_BLUES
-#define t1_blend_force_bold           T1_BLEND_FORCE_BOLD
-#define t1_blend_max                  T1_BLEND_MAX
-
-
- -

A set of flags used to indicate which fields are present in a given blend dictionary (font info or private). Used to support Multiple Masters fonts.

-

values

- - - - - - - - - - - - - - - - -
T1_BLEND_UNDERLINE_POSITION - -
T1_BLEND_UNDERLINE_THICKNESS - -
T1_BLEND_ITALIC_ANGLE - -
T1_BLEND_BLUE_VALUES - -
T1_BLEND_OTHER_BLUES - -
T1_BLEND_STANDARD_WIDTH - -
T1_BLEND_STANDARD_HEIGHT - -
T1_BLEND_STEM_SNAP_WIDTHS - -
T1_BLEND_STEM_SNAP_HEIGHTS - -
T1_BLEND_BLUE_SCALE - -
T1_BLEND_BLUE_SHIFT - -
T1_BLEND_FAMILY_BLUES - -
T1_BLEND_FAMILY_OTHER_BLUES - -
T1_BLEND_FORCE_BOLD - -
- -
- -

T1_EncodingType

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef enum  T1_EncodingType_
-  {
-    T1_ENCODING_TYPE_NONE = 0,
-    T1_ENCODING_TYPE_ARRAY,
-    T1_ENCODING_TYPE_STANDARD,
-    T1_ENCODING_TYPE_ISOLATIN1,
-    T1_ENCODING_TYPE_EXPERT
-
-  } T1_EncodingType;
-
-
- -

An enumeration describing the ‘Encoding’ entry in a Type 1 dictionary.

-

values

- - - - - - - -
T1_ENCODING_TYPE_NONE - -
T1_ENCODING_TYPE_ARRAY - -
T1_ENCODING_TYPE_STANDARD - -
T1_ENCODING_TYPE_ISOLATIN1 - -
T1_ENCODING_TYPE_EXPERT - -
- -

since

- -

2.4.8

-
- -

PS_Dict_Keys

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef enum  PS_Dict_Keys_
-  {
-    /* conventionally in the font dictionary */
-    PS_DICT_FONT_TYPE,              /* FT_Byte         */
-    PS_DICT_FONT_MATRIX,            /* FT_Fixed        */
-    PS_DICT_FONT_BBOX,              /* FT_Fixed        */
-    PS_DICT_PAINT_TYPE,             /* FT_Byte         */
-    PS_DICT_FONT_NAME,              /* FT_String*      */
-    PS_DICT_UNIQUE_ID,              /* FT_Int          */
-    PS_DICT_NUM_CHAR_STRINGS,       /* FT_Int          */
-    PS_DICT_CHAR_STRING_KEY,        /* FT_String*      */
-    PS_DICT_CHAR_STRING,            /* FT_String*      */
-    PS_DICT_ENCODING_TYPE,          /* T1_EncodingType */
-    PS_DICT_ENCODING_ENTRY,         /* FT_String*      */
-
-    /* conventionally in the font Private dictionary */
-    PS_DICT_NUM_SUBRS,              /* FT_Int     */
-    PS_DICT_SUBR,                   /* FT_String* */
-    PS_DICT_STD_HW,                 /* FT_UShort  */
-    PS_DICT_STD_VW,                 /* FT_UShort  */
-    PS_DICT_NUM_BLUE_VALUES,        /* FT_Byte    */
-    PS_DICT_BLUE_VALUE,             /* FT_Short   */
-    PS_DICT_BLUE_FUZZ,              /* FT_Int     */
-    PS_DICT_NUM_OTHER_BLUES,        /* FT_Byte    */
-    PS_DICT_OTHER_BLUE,             /* FT_Short   */
-    PS_DICT_NUM_FAMILY_BLUES,       /* FT_Byte    */
-    PS_DICT_FAMILY_BLUE,            /* FT_Short   */
-    PS_DICT_NUM_FAMILY_OTHER_BLUES, /* FT_Byte    */
-    PS_DICT_FAMILY_OTHER_BLUE,      /* FT_Short   */
-    PS_DICT_BLUE_SCALE,             /* FT_Fixed   */
-    PS_DICT_BLUE_SHIFT,             /* FT_Int     */
-    PS_DICT_NUM_STEM_SNAP_H,        /* FT_Byte    */
-    PS_DICT_STEM_SNAP_H,            /* FT_Short   */
-    PS_DICT_NUM_STEM_SNAP_V,        /* FT_Byte    */
-    PS_DICT_STEM_SNAP_V,            /* FT_Short   */
-    PS_DICT_FORCE_BOLD,             /* FT_Bool    */
-    PS_DICT_RND_STEM_UP,            /* FT_Bool    */
-    PS_DICT_MIN_FEATURE,            /* FT_Short   */
-    PS_DICT_LEN_IV,                 /* FT_Int     */
-    PS_DICT_PASSWORD,               /* FT_Long    */
-    PS_DICT_LANGUAGE_GROUP,         /* FT_Long    */
-
-    /* conventionally in the font FontInfo dictionary */
-    PS_DICT_VERSION,                /* FT_String* */
-    PS_DICT_NOTICE,                 /* FT_String* */
-    PS_DICT_FULL_NAME,              /* FT_String* */
-    PS_DICT_FAMILY_NAME,            /* FT_String* */
-    PS_DICT_WEIGHT,                 /* FT_String* */
-    PS_DICT_IS_FIXED_PITCH,         /* FT_Bool    */
-    PS_DICT_UNDERLINE_POSITION,     /* FT_Short   */
-    PS_DICT_UNDERLINE_THICKNESS,    /* FT_UShort  */
-    PS_DICT_FS_TYPE,                /* FT_UShort  */
-    PS_DICT_ITALIC_ANGLE,           /* FT_Long    */
-
-    PS_DICT_MAX = PS_DICT_ITALIC_ANGLE
-
-  } PS_Dict_Keys;
-
-
- -

An enumeration used in calls to FT_Get_PS_Font_Value to identify the Type 1 dictionary entry to retrieve.

-

values

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
PS_DICT_FONT_TYPE - -
PS_DICT_FONT_MATRIX - -
PS_DICT_FONT_BBOX - -
PS_DICT_PAINT_TYPE - -
PS_DICT_FONT_NAME - -
PS_DICT_UNIQUE_ID - -
PS_DICT_NUM_CHAR_STRINGS - -
PS_DICT_CHAR_STRING_KEY - -
PS_DICT_CHAR_STRING - -
PS_DICT_ENCODING_TYPE - -
PS_DICT_ENCODING_ENTRY - -
PS_DICT_NUM_SUBRS - -
PS_DICT_SUBR - -
PS_DICT_STD_HW - -
PS_DICT_STD_VW - -
PS_DICT_NUM_BLUE_VALUES - -
PS_DICT_BLUE_VALUE - -
PS_DICT_BLUE_FUZZ - -
PS_DICT_NUM_OTHER_BLUES - -
PS_DICT_OTHER_BLUE - -
PS_DICT_NUM_FAMILY_BLUES - -
PS_DICT_FAMILY_BLUE - -
PS_DICT_NUM_FAMILY_OTHER_BLUES - -
PS_DICT_FAMILY_OTHER_BLUE - -
PS_DICT_BLUE_SCALE - -
PS_DICT_BLUE_SHIFT - -
PS_DICT_NUM_STEM_SNAP_H - -
PS_DICT_STEM_SNAP_H - -
PS_DICT_NUM_STEM_SNAP_V - -
PS_DICT_STEM_SNAP_V - -
PS_DICT_FORCE_BOLD - -
PS_DICT_RND_STEM_UP - -
PS_DICT_MIN_FEATURE - -
PS_DICT_LEN_IV - -
PS_DICT_PASSWORD - -
PS_DICT_LANGUAGE_GROUP - -
PS_DICT_VERSION - -
PS_DICT_NOTICE - -
PS_DICT_FULL_NAME - -
PS_DICT_FAMILY_NAME - -
PS_DICT_WEIGHT - -
PS_DICT_IS_FIXED_PITCH - -
PS_DICT_UNDERLINE_POSITION - -
PS_DICT_UNDERLINE_THICKNESS - -
PS_DICT_FS_TYPE - -
PS_DICT_ITALIC_ANGLE - -
- -

since

- -

2.4.8

-
- -

T1_FontInfo

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef PS_FontInfoRec  T1_FontInfo;
-
-
- -

This type is equivalent to PS_FontInfoRec. It is deprecated but kept to maintain source compatibility between various versions of FreeType.

-
- -

T1_Private

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef PS_PrivateRec  T1_Private;
-
-
- -

This type is equivalent to PS_PrivateRec. It is deprecated but kept to maintain source compatibility between various versions of FreeType.

-
- -

CID_FontDict

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef CID_FaceDictRec  CID_FontDict;
-
-
- -

This type is equivalent to CID_FaceDictRec. It is deprecated but kept to maintain source compatibility between various versions of FreeType.

-
- -

CID_Info

-

Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h).

-
-
-  typedef CID_FaceInfoRec  CID_Info;
-
-
- -

This type is equivalent to CID_FaceInfoRec. It is deprecated but kept to maintain source compatibility between various versions of FreeType.

-
- - - - - - - - - -
-
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FreeType » Docs » General Remarks » User allocation

-
-

User allocation

-

Synopsis

-

FreeType assumes that structures allocated by the user and passed as arguments are zeroed out except for the actual data. In other words, it is recommended to use calloc (or variants of it) instead of malloc for allocation.

- - - - - - - - - -
-
-
-
- - - - -
- - - - - - - - - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/ft2-version.html b/ThirdParty/freetype/docs/reference/site/ft2-version.html deleted file mode 100644 index d5a9b7c..0000000 --- a/ThirdParty/freetype/docs/reference/site/ft2-version.html +++ /dev/null @@ -1,1341 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FreeType Version - FreeType-2.10.0 API Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Skip to content - - - -
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FreeType » Docs » Core API » FreeType Version

-
-

FreeType Version

-

Synopsis

-

Note that those functions and macros are of limited use because even a new release of FreeType with only documentation changes increases the version number.

-

FT_Library_Version

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( void )
-  FT_Library_Version( FT_Library   library,
-                      FT_Int      *amajor,
-                      FT_Int      *aminor,
-                      FT_Int      *apatch );
-
-
- -

Return the version of the FreeType library being used. This is useful when dynamically linking to the library, since one cannot use the macros FREETYPE_MAJOR, FREETYPE_MINOR, and FREETYPE_PATCH.

-

input

- - - -
library -

A source library handle.

-
- -

output

- - - - - -
amajor -

The major version number.

-
aminor -

The minor version number.

-
apatch -

The patch version number.

-
- -

note

- -

The reason why this function takes a library argument is because certain programs implement library initialization in a custom way that doesn't use FT_Init_FreeType.

-

In such cases, the library version might not be available before the library object has been created.

-
- -

FT_Face_CheckTrueTypePatents

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Bool )
-  FT_Face_CheckTrueTypePatents( FT_Face  face );
-
-
- -

Deprecated, does nothing.

-

input

- - - -
face -

A face handle.

-
- -

return

- -

Always returns false.

-

note

- -

Since May 2010, TrueType hinting is no longer patented.

-

since

- -

2.3.5

-
- -

FT_Face_SetUnpatentedHinting

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-  FT_EXPORT( FT_Bool )
-  FT_Face_SetUnpatentedHinting( FT_Face  face,
-                                FT_Bool  value );
-
-
- -

Deprecated, does nothing.

-

input

- - - - -
face -

A face handle.

-
value -

New boolean setting.

-
- -

return

- -

Always returns false.

-

note

- -

Since May 2010, TrueType hinting is no longer patented.

-

since

- -

2.3.5

-
- -

FREETYPE_XXX

-

Defined in FT_FREETYPE_H (freetype/freetype.h).

-
-
-#define FREETYPE_MAJOR  2
-#define FREETYPE_MINOR  10
-#define FREETYPE_PATCH  0
-
-
- -

These three macros identify the FreeType source code version. Use FT_Library_Version to access them at runtime.

-

values

- - - - - -
FREETYPE_MAJOR -

The major version number.

-
FREETYPE_MINOR -

The minor version number.

-
FREETYPE_PATCH -

The patch level.

-
- -

note

- -

The version number of FreeType if built as a dynamic link library with the ‘libtool’ package is not controlled by these three macros.

-
- - - - - - - - - -
-
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FreeType » Docs » Format-Specific API » Window FNT Files

-
-

Window FNT Files

-

Synopsis

-

This section contains the declaration of Windows FNT-specific functions.

-

FT_WinFNT_ID_XXX

-

Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).

-
-
-#define FT_WinFNT_ID_CP1252    0
-#define FT_WinFNT_ID_DEFAULT   1
-#define FT_WinFNT_ID_SYMBOL    2
-#define FT_WinFNT_ID_MAC      77
-#define FT_WinFNT_ID_CP932   128
-#define FT_WinFNT_ID_CP949   129
-#define FT_WinFNT_ID_CP1361  130
-#define FT_WinFNT_ID_CP936   134
-#define FT_WinFNT_ID_CP950   136
-#define FT_WinFNT_ID_CP1253  161
-#define FT_WinFNT_ID_CP1254  162
-#define FT_WinFNT_ID_CP1258  163
-#define FT_WinFNT_ID_CP1255  177
-#define FT_WinFNT_ID_CP1256  178
-#define FT_WinFNT_ID_CP1257  186
-#define FT_WinFNT_ID_CP1251  204
-#define FT_WinFNT_ID_CP874   222
-#define FT_WinFNT_ID_CP1250  238
-#define FT_WinFNT_ID_OEM     255
-
-
- -

A list of valid values for the charset byte in FT_WinFNT_HeaderRec. Exact mapping tables for the various ‘cpXXXX’ encodings (except for ‘cp1361’) can be found at ‘ftp://ftp.unicode.org/Public’ in the MAPPINGS/VENDORS/MICSFT/WINDOWS subdirectory. ‘cp1361’ is roughly a superset of MAPPINGS/OBSOLETE/EASTASIA/KSC/JOHAB.TXT.

-

values

- - - - - - - - - - - - - - - - - - - - - -
FT_WinFNT_ID_DEFAULT -

This is used for font enumeration and font creation as a ‘don't care’ value. Valid font files don't contain this value. When querying for information about the character set of the font that is currently selected into a specified device context, this return value (of the related Windows API) simply denotes failure.

-
FT_WinFNT_ID_SYMBOL -

There is no known mapping table available.

-
FT_WinFNT_ID_MAC -

Mac Roman encoding.

-
FT_WinFNT_ID_OEM -

From Michael Poettgen <michael@poettgen.de>:

-

The ‘Windows Font Mapping’ article says that FT_WinFNT_ID_OEM is used for the charset of vector fonts, like modern.fon, roman.fon, and script.fon on Windows.

-

The ‘CreateFont’ documentation says: The FT_WinFNT_ID_OEM value specifies a character set that is operating-system dependent.

-

The ‘IFIMETRICS’ documentation from the ‘Windows Driver Development Kit’ says: This font supports an OEM-specific character set. The OEM character set is system dependent.

-

In general OEM, as opposed to ANSI (i.e., ‘cp1252’), denotes the second default codepage that most international versions of Windows have. It is one of the OEM codepages from

-

https://docs.microsoft.com/en-us/windows/desktop/intl/code-page-identifiers ,

-

and is used for the ‘DOS boxes’, to support legacy applications. A German Windows version for example usually uses ANSI codepage 1252 and OEM codepage 850.

-
FT_WinFNT_ID_CP874 -

A superset of Thai TIS 620 and ISO 8859-11.

-
FT_WinFNT_ID_CP932 -

A superset of Japanese Shift-JIS (with minor deviations).

-
FT_WinFNT_ID_CP936 -

A superset of simplified Chinese GB 2312-1980 (with different ordering and minor deviations).

-
FT_WinFNT_ID_CP949 -

A superset of Korean Hangul KS C 5601-1987 (with different ordering and minor deviations).

-
FT_WinFNT_ID_CP950 -

A superset of traditional Chinese Big 5 ETen (with different ordering and minor deviations).

-
FT_WinFNT_ID_CP1250 -

A superset of East European ISO 8859-2 (with slightly different ordering).

-
FT_WinFNT_ID_CP1251 -

A superset of Russian ISO 8859-5 (with different ordering).

-
FT_WinFNT_ID_CP1252 -

ANSI encoding. A superset of ISO 8859-1.

-
FT_WinFNT_ID_CP1253 -

A superset of Greek ISO 8859-7 (with minor modifications).

-
FT_WinFNT_ID_CP1254 -

A superset of Turkish ISO 8859-9.

-
FT_WinFNT_ID_CP1255 -

A superset of Hebrew ISO 8859-8 (with some modifications).

-
FT_WinFNT_ID_CP1256 -

A superset of Arabic ISO 8859-6 (with different ordering).

-
FT_WinFNT_ID_CP1257 -

A superset of Baltic ISO 8859-13 (with some deviations).

-
FT_WinFNT_ID_CP1258 -

For Vietnamese. This encoding doesn't cover all necessary characters.

-
FT_WinFNT_ID_CP1361 -

Korean (Johab).

-
- -
- -

FT_WinFNT_HeaderRec

-

Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).

-
-
-  typedef struct  FT_WinFNT_HeaderRec_
-  {
-    FT_UShort  version;
-    FT_ULong   file_size;
-    FT_Byte    copyright[60];
-    FT_UShort  file_type;
-    FT_UShort  nominal_point_size;
-    FT_UShort  vertical_resolution;
-    FT_UShort  horizontal_resolution;
-    FT_UShort  ascent;
-    FT_UShort  internal_leading;
-    FT_UShort  external_leading;
-    FT_Byte    italic;
-    FT_Byte    underline;
-    FT_Byte    strike_out;
-    FT_UShort  weight;
-    FT_Byte    charset;
-    FT_UShort  pixel_width;
-    FT_UShort  pixel_height;
-    FT_Byte    pitch_and_family;
-    FT_UShort  avg_width;
-    FT_UShort  max_width;
-    FT_Byte    first_char;
-    FT_Byte    last_char;
-    FT_Byte    default_char;
-    FT_Byte    break_char;
-    FT_UShort  bytes_per_row;
-    FT_ULong   device_offset;
-    FT_ULong   face_name_offset;
-    FT_ULong   bits_pointer;
-    FT_ULong   bits_offset;
-    FT_Byte    reserved;
-    FT_ULong   flags;
-    FT_UShort  A_space;
-    FT_UShort  B_space;
-    FT_UShort  C_space;
-    FT_UShort  color_table_offset;
-    FT_ULong   reserved1[4];
-
-  } FT_WinFNT_HeaderRec;
-
-
- -

Windows FNT Header info.

-
- -

FT_WinFNT_Header

-

Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).

-
-
-  typedef struct FT_WinFNT_HeaderRec_*  FT_WinFNT_Header;
-
-
- -

A handle to an FT_WinFNT_HeaderRec structure.

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FT_Get_WinFNT_Header

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Defined in FT_WINFONTS_H (freetype/ftwinfnt.h).

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Retrieve a Windows FNT font info header.

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input

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A handle to the input face.

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The WinFNT header.

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return

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FreeType error code. 0 means success.

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note

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This function only works with Windows FNT faces, returning an error otherwise.

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FreeType » Docs » Table of Contents

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FreeType-2.10.0 API Reference

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Table of Contents

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General Remarks

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FreeType's header inclusion scheme -

How client applications should include FreeType header files.

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User allocation -

How client applications should allocate FreeType data structures.

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Core API

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FreeType Version -

Functions and macros related to FreeType versions.

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Basic Data Types -

The basic data types defined by the library.

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Base Interface -

The FreeType 2 base font interface.

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Unicode Variation Sequences -

The FreeType 2 interface to Unicode Variation Sequences (UVS), using the SFNT cmap format 14.

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Glyph Color Management -

Retrieving and manipulating OpenType's ‘CPAL’ table data.

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Glyph Layer Management -

Retrieving and manipulating OpenType's ‘COLR’ table data.

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Glyph Management -

Generic interface to manage individual glyph data.

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Mac Specific Interface -

Only available on the Macintosh.

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Size Management -

Managing multiple sizes per face.

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Header File Macros -

Macro definitions used to #include specific header files.

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Format-Specific API

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Multiple Masters -

How to manage Multiple Masters fonts.

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TrueType Tables -

TrueType-specific table types and functions.

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Type 1 Tables -

Type 1-specific font tables.

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SFNT Names -

Access the names embedded in TrueType and OpenType files.

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BDF and PCF Files -

BDF and PCF specific API.

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CID Fonts -

CID-keyed font-specific API.

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PFR Fonts -

PFR/TrueDoc-specific API.

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Window FNT Files -

Windows FNT-specific API.

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Font Formats -

Getting the font format.

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Gasp Table -

Retrieving TrueType ‘gasp’ table entries.

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Controlling FreeType Modules

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The auto-hinter -

Controlling the auto-hinting module.

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The CFF driver -

Controlling the CFF driver module.

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The Type 1 and CID drivers -

Controlling the Type 1 and CID driver modules.

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The TrueType driver -

Controlling the TrueType driver module.

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The PCF driver -

Controlling the PCF driver module.

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Driver properties -

Controlling driver modules.

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Parameter Tags -

Macros for driver property and font loading parameter tags.

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Subpixel Rendering -

API to control subpixel rendering.

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Cache Sub-System

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Cache Sub-System -

How to cache face, size, and glyph data with FreeType 2.

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Support API

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Computations -

Crunching fixed numbers and vectors.

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List Processing -

Simple management of lists.

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Outline Processing -

Functions to create, transform, and render vectorial glyph images.

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Quick retrieval of advance values -

Retrieve horizontal and vertical advance values without processing glyph outlines, if possible.

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Bitmap Handling -

Handling FT_Bitmap objects.

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Scanline Converter -

How vectorial outlines are converted into bitmaps and pixmaps.

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Glyph Stroker -

Generating bordered and stroked glyphs.

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System Interface -

How FreeType manages memory and i/o.

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Module Management -

How to add, upgrade, remove, and control modules from FreeType.

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GZIP Streams -

Using gzip-compressed font files.

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LZW Streams -

Using LZW-compressed font files.

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BZIP2 Streams -

Using bzip2-compressed font files.

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Error Codes

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Error Enumerations -

How to handle errors and error strings.

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Error Code Values -

All possible error codes returned by FreeType functions.

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Miscellaneous

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OpenType Validation -

An API to validate OpenType tables.

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Incremental Loading -

Custom Glyph Loading.

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The TrueType Engine -

TrueType bytecode support.

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TrueTypeGX/AAT Validation -

An API to validate TrueTypeGX/AAT tables.

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Global Index

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generated on Fri Mar 15 07:01:13 2019 UTC
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User allocation How client applications should allocate FreeType data structures. Core API FreeType Version Functions and macros related to FreeType versions. Basic Data Types The basic data types defined by the library. Base Interface The FreeType 2 base font interface. Unicode Variation Sequences The FreeType 2 interface to Unicode Variation Sequences (UVS), using the SFNT cmap format 14. Glyph Color Management Retrieving and manipulating OpenType's CPAL table data. Glyph Layer Management Retrieving and manipulating OpenType's COLR table data. Glyph Management Generic interface to manage individual glyph data. Mac Specific Interface Only available on the Macintosh. Size Management Managing multiple sizes per face. Header File Macros Macro definitions used to #include specific header files. Format-Specific API Multiple Masters How to manage Multiple Masters fonts. TrueType Tables TrueType-specific table types and functions. Type 1 Tables Type 1-specific font tables. SFNT Names Access the names embedded in TrueType and OpenType files. BDF and PCF Files BDF and PCF specific API. CID Fonts CID-keyed font-specific API. PFR Fonts PFR/TrueDoc-specific API. Window FNT Files Windows FNT-specific API. Font Formats Getting the font format. Gasp Table Retrieving TrueType gasp table entries. Controlling FreeType Modules The auto-hinter Controlling the auto-hinting module. The CFF driver Controlling the CFF driver module. The Type 1 and CID drivers Controlling the Type 1 and CID driver modules. The TrueType driver Controlling the TrueType driver module. The PCF driver Controlling the PCF driver module. Driver properties Controlling driver modules. Parameter Tags Macros for driver property and font loading parameter tags. Subpixel Rendering API to control subpixel rendering. Cache Sub-System Cache Sub-System How to cache face, size, and glyph data with FreeType 2. Support API Computations Crunching fixed numbers and vectors. List Processing Simple management of lists. Outline Processing Functions to create, transform, and render vectorial glyph images. Quick retrieval of advance values Retrieve horizontal and vertical advance values without processing glyph outlines, if possible. Bitmap Handling Handling FT_Bitmap objects. Scanline Converter How vectorial outlines are converted into bitmaps and pixmaps. Glyph Stroker Generating bordered and stroked glyphs. System Interface How FreeType manages memory and i/o. Module Management How to add, upgrade, remove, and control modules from FreeType. GZIP Streams Using gzip-compressed font files. LZW Streams Using LZW-compressed font files. BZIP2 Streams Using bzip2-compressed font files. Error Codes Error Enumerations How to handle errors and error strings. Error Code Values All possible error codes returned by FreeType functions. Miscellaneous OpenType Validation An API to validate OpenType tables. Incremental Loading Custom Glyph Loading. 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In case this is too cumbersome, a single FT_Library object across threads is possible also, as long as a mutex lock is used around FT_New_Face and FT_Done_Face . note Library objects are normally created by FT_Init_FreeType , and destroyed with FT_Done_FreeType . If you need reference-counting (cf. FT_Reference_Library ), use FT_New_Library and FT_Done_Library . FT_Face Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_FaceRec_* FT_Face ; A handle to a typographic face object. A face object models a given typeface, in a given style. note A face object also owns a single FT_GlyphSlot object, as well as one or more FT_Size objects. Use FT_New_Face or FT_Open_Face to create a new face object from a given filepath or a custom input stream. Use FT_Done_Face to destroy it (along with its slot and sizes). An FT_Face object can only be safely used from one thread at a time. Similarly, creation and destruction of FT_Face with the same FT_Library object can only be done from one thread at a time. On the other hand, functions like FT_Load_Glyph and its siblings are thread-safe and do not need the lock to be held as long as the same FT_Face object is not used from multiple threads at the same time. also See FT_FaceRec for the publicly accessible fields of a given face object. FT_Size Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_SizeRec_* FT_Size ; A handle to an object that models a face scaled to a given character size. note An FT_Face has one active FT_Size object that is used by functions like FT_Load_Glyph to determine the scaling transformation that in turn is used to load and hint glyphs and metrics. You can use FT_Set_Char_Size , FT_Set_Pixel_Sizes , FT_Request_Size or even FT_Select_Size to change the content (i.e., the scaling values) of the active FT_Size . You can use FT_New_Size to create additional size objects for a given FT_Face , but they won't be used by other functions until you activate it through FT_Activate_Size . Only one size can be activated at any given time per face. also See FT_SizeRec for the publicly accessible fields of a given size object. FT_GlyphSlot Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_GlyphSlotRec_* FT_GlyphSlot ; A handle to a given glyph slot . A slot is a container that can hold any of the glyphs contained in its parent face. In other words, each time you call FT_Load_Glyph or FT_Load_Char , the slot's content is erased by the new glyph data, i.e., the glyph's metrics, its image (bitmap or outline), and other control information. also See FT_GlyphSlotRec for the publicly accessible glyph fields. FT_CharMap Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_CharMapRec_* FT_CharMap ; A handle to a character map (usually abbreviated to charmap ). A charmap is used to translate character codes in a given encoding into glyph indexes for its parent's face. Some font formats may provide several charmaps per font. Each face object owns zero or more charmaps, but only one of them can be active , providing the data used by FT_Get_Char_Index or FT_Load_Char . The list of available charmaps in a face is available through the face- num_charmaps and face- charmaps fields of FT_FaceRec . The currently active charmap is available as face- charmap . You should call FT_Set_Charmap to change it. note When a new face is created (either through FT_New_Face or FT_Open_Face ), the library looks for a Unicode charmap within the list and automatically activates it. If there is no Unicode charmap, FreeType doesn't set an active charmap. also See FT_CharMapRec for the publicly accessible fields of a given character map. FT_Encoding Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Encoding_ { FT_ENC_TAG ( FT_ENCODING_NONE , 0, 0, 0, 0 ), FT_ENC_TAG ( FT_ENCODING_MS_SYMBOL , 's', 'y', 'm', 'b' ), FT_ENC_TAG ( FT_ENCODING_UNICODE , 'u', 'n', 'i', 'c' ), FT_ENC_TAG ( FT_ENCODING_SJIS , 's', 'j', 'i', 's' ), FT_ENC_TAG ( FT_ENCODING_PRC , 'g', 'b', ' ', ' ' ), FT_ENC_TAG ( FT_ENCODING_BIG5 , 'b', 'i', 'g', '5' ), FT_ENC_TAG ( FT_ENCODING_WANSUNG , 'w', 'a', 'n', 's' ), FT_ENC_TAG ( FT_ENCODING_JOHAB , 'j', 'o', 'h', 'a' ), /* for backward compatibility */ FT_ENCODING_GB2312 = FT_ENCODING_PRC , FT_ENCODING_MS_SJIS = FT_ENCODING_SJIS , FT_ENCODING_MS_GB2312 = FT_ENCODING_PRC , FT_ENCODING_MS_BIG5 = FT_ENCODING_BIG5 , FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG , FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB , FT_ENC_TAG ( FT_ENCODING_ADOBE_STANDARD , 'A', 'D', 'O', 'B' ), FT_ENC_TAG ( FT_ENCODING_ADOBE_EXPERT , 'A', 'D', 'B', 'E' ), FT_ENC_TAG ( FT_ENCODING_ADOBE_CUSTOM , 'A', 'D', 'B', 'C' ), FT_ENC_TAG ( FT_ENCODING_ADOBE_LATIN_1 , 'l', 'a', 't', '1' ), FT_ENC_TAG ( FT_ENCODING_OLD_LATIN_2 , 'l', 'a', 't', '2' ), FT_ENC_TAG ( FT_ENCODING_APPLE_ROMAN , 'a', 'r', 'm', 'n' ) } FT_Encoding ; /* these constants are deprecated; use the corresponding ` FT_Encoding ` */ /* values instead */ # define ft_encoding_none FT_ENCODING_NONE # define ft_encoding_unicode FT_ENCODING_UNICODE # define ft_encoding_symbol FT_ENCODING_MS_SYMBOL # define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1 # define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2 # define ft_encoding_sjis FT_ENCODING_SJIS # define ft_encoding_gb2312 FT_ENCODING_PRC # define ft_encoding_big5 FT_ENCODING_BIG5 # define ft_encoding_wansung FT_ENCODING_WANSUNG # define ft_encoding_johab FT_ENCODING_JOHAB # define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD # define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT # define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM # define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN An enumeration to specify character sets supported by charmaps. Used in the FT_Select_Charmap API function. note Despite the name, this enumeration lists specific character repertories (i.e., charsets), and not text encoding methods (e.g., UTF-8, UTF-16, etc.). Other encodings might be defined in the future. values FT_ENCODING_NONE The encoding value 0 is reserved for all formats except BDF, PCF, and Windows FNT; see below for more information. FT_ENCODING_UNICODE The Unicode character set. This value covers all versions of the Unicode repertoire, including ASCII and Latin-1. Most fonts include a Unicode charmap, but not all of them. For example, if you want to access Unicode value U+1F028 (and the font contains it), use value 0x1F028 as the input value for FT_Get_Char_Index . FT_ENCODING_MS_SYMBOL Microsoft Symbol encoding, used to encode mathematical symbols and wingdings. For more information, see https://www.microsoft.com/typography/otspec/recom.htm , http://www.kostis.net/charsets/symbol.htm , and http://www.kostis.net/charsets/wingding.htm . This encoding uses character codes from the PUA (Private Unicode Area) in the range U+F020-U+F0FF. FT_ENCODING_SJIS Shift JIS encoding for Japanese. More info at https://en.wikipedia.org/wiki/Shift_JIS . See note on multi-byte encodings below. FT_ENCODING_PRC Corresponds to encoding systems mainly for Simplified Chinese as used in People's Republic of China (PRC). The encoding layout is based on GB 2312 and its supersets GBK and GB 18030. FT_ENCODING_BIG5 Corresponds to an encoding system for Traditional Chinese as used in Taiwan and Hong Kong. FT_ENCODING_WANSUNG Corresponds to the Korean encoding system known as Extended Wansung (MS Windows code page 949). For more information see https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit949.txt . FT_ENCODING_JOHAB The Korean standard character set (KS C 5601-1992), which corresponds to MS Windows code page 1361. This character set includes all possible Hangul character combinations. FT_ENCODING_ADOBE_LATIN_1 Corresponds to a Latin-1 encoding as defined in a Type 1 PostScript font. It is limited to 256 character codes. FT_ENCODING_ADOBE_STANDARD Adobe Standard encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes. FT_ENCODING_ADOBE_EXPERT Adobe Expert encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes. FT_ENCODING_ADOBE_CUSTOM Corresponds to a custom encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes. FT_ENCODING_APPLE_ROMAN Apple roman encoding. Many TrueType and OpenType fonts contain a charmap for this 8-bit encoding, since older versions of Mac OS are able to use it. FT_ENCODING_OLD_LATIN_2 This value is deprecated and was neither used nor reported by FreeType. Don't use or test for it. FT_ENCODING_MS_SJIS Same as FT_ENCODING_SJIS. Deprecated. FT_ENCODING_MS_GB2312 Same as FT_ENCODING_PRC. Deprecated. FT_ENCODING_MS_BIG5 Same as FT_ENCODING_BIG5. Deprecated. FT_ENCODING_MS_WANSUNG Same as FT_ENCODING_WANSUNG. Deprecated. FT_ENCODING_MS_JOHAB Same as FT_ENCODING_JOHAB. Deprecated. note By default, FreeType enables a Unicode charmap and tags it with FT_ENCODING_UNICODE when it is either provided or can be generated from PostScript glyph name dictionaries in the font file. All other encodings are considered legacy and tagged only if explicitly defined in the font file. Otherwise, FT_ENCODING_NONE is used. FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap is neither Unicode nor ISO-8859-1 (otherwise it is set to FT_ENCODING_UNICODE ). Use FT_Get_BDF_Charset_ID to find out which encoding is really present. If, for example, the cs_registry field is KOI8 and the cs_encoding field is R , the font is encoded in KOI8-R. FT_ENCODING_NONE is always set (with a single exception) by the winfonts driver. Use FT_Get_WinFNT_Header and examine the charset field of the FT_WinFNT_HeaderRec structure to find out which encoding is really present. For example, FT_WinFNT_ID_CP1251 (204) means Windows code page 1251 (for Russian). FT_ENCODING_NONE is set if platform_id is TT_PLATFORM_MACINTOSH and encoding_id is not TT_MAC_ID_ROMAN (otherwise it is set to FT_ENCODING_APPLE_ROMAN ). If platform_id is TT_PLATFORM_MACINTOSH , use the function FT_Get_CMap_Language_ID to query the Mac language ID that may be needed to be able to distinguish Apple encoding variants. See https://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt to get an idea how to do that. Basically, if the language ID is 0, don't use it, otherwise subtract 1 from the language ID. Then examine encoding_id . If, for example, encoding_id is TT_MAC_ID_ROMAN and the language ID (minus 1) is TT_MAC_LANGID_GREEK , it is the Greek encoding, not Roman. TT_MAC_ID_ARABIC with TT_MAC_LANGID_FARSI means the Farsi variant the Arabic encoding. FT_ENC_TAG Defined in FT_FREETYPE_H (freetype/freetype.h). # ifndef FT_ENC_TAG # define FT_ENC_TAG ( value, a, b, c, d ) \\ value = ( ( ( FT_UInt32 )(a) 24 ) | \\ ( ( FT_UInt32 )(b) 16 ) | \\ ( ( FT_UInt32 )(c) 8 ) | \\ ( FT_UInt32 )(d) ) # endif /* FT_ENC_TAG */ This macro converts four-letter tags into an unsigned long. It is used to define encoding identifiers (see FT_Encoding ). note Since many 16-bit compilers don't like 32-bit enumerations, you should redefine this macro in case of problems to something like this: #define FT_ENC_TAG( value, a, b, c, d ) value to get a simple enumeration without assigning special numbers. FT_FaceRec Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_FaceRec_ { FT_Long num_faces; FT_Long face_index; FT_Long face_flags; FT_Long style_flags; FT_Long num_glyphs; FT_String * family_name; FT_String * style_name; FT_Int num_fixed_sizes; FT_Bitmap_Size * available_sizes; FT_Int num_charmaps; FT_CharMap * charmaps; FT_Generic generic; /*# The following member variables (down to `underline_thickness`) */ /*# are only relevant to scalable outlines; cf. @ FT_Bitmap_Size */ /*# for bitmap fonts. */ FT_BBox bbox; FT_UShort units_per_EM; FT_Short ascender; FT_Short descender; FT_Short height; FT_Short max_advance_width; FT_Short max_advance_height; FT_Short underline_position; FT_Short underline_thickness; FT_GlyphSlot glyph; FT_Size size; FT_CharMap charmap; /*@private begin */ FT_Driver driver; FT_Memory memory; FT_Stream stream; FT_ListRec sizes_list; FT_Generic autohint; /* face-specific auto-hinter data */ void * extensions; /* unused */ FT_Face_Internal internal; /*@private end */ } FT_FaceRec ; FreeType root face class structure. A face object models a typeface in a font file. fields num_faces The number of faces in the font file. Some font formats can have multiple faces in a single font file. face_index This field holds two different values. Bits 0-15 are the index of the face in the font file (starting with value 0). They are set to 0 if there is only one face in the font file. [Since 2.6.1] Bits 16-30 are relevant to GX and OpenType variation fonts only, holding the named instance index for the current face index (starting with value 1; value 0 indicates font access without a named instance). For non-variation fonts, bits 16-30 are ignored. If we have the third named instance of face 4, say, face_index is set to 0x00030004. Bit 31 is always zero (this is, face_index is always a positive value). [Since 2.9] Changing the design coordinates with FT_Set_Var_Design_Coordinates or FT_Set_Var_Blend_Coordinates does not influence the named instance index value (only FT_Set_Named_Instance does that). face_flags A set of bit flags that give important information about the face; see FT_FACE_FLAG_XXX for the details. style_flags The lower 16 bits contain a set of bit flags indicating the style of the face; see FT_STYLE_FLAG_XXX for the details. [Since 2.6.1] Bits 16-30 hold the number of named instances available for the current face if we have a GX or OpenType variation (sub)font. Bit 31 is always zero (this is, style_flags is always a positive value). Note that a variation font has always at least one named instance, namely the default instance. num_glyphs The number of glyphs in the face. If the face is scalable and has sbits (see num_fixed_sizes ), it is set to the number of outline glyphs. For CID-keyed fonts (not in an SFNT wrapper) this value gives the highest CID used in the font. family_name The face's family name. This is an ASCII string, usually in English, that describes the typeface's family (like Times New Roman , Bodoni , Garamond , etc). This is a least common denominator used to list fonts. Some formats (TrueType OpenType) provide localized and Unicode versions of this string. Applications should use the format-specific interface to access them. Can be NULL (e.g., in fonts embedded in a PDF file). In case the font doesn't provide a specific family name entry, FreeType tries to synthesize one, deriving it from other name entries. style_name The face's style name. This is an ASCII string, usually in English, that describes the typeface's style (like Italic , Bold , Condensed , etc). Not all font formats provide a style name, so this field is optional, and can be set to NULL . As for family_name , some formats provide localized and Unicode versions of this string. Applications should use the format-specific interface to access them. num_fixed_sizes The number of bitmap strikes in the face. Even if the face is scalable, there might still be bitmap strikes, which are called sbits in that case. available_sizes An array of FT_Bitmap_Size for all bitmap strikes in the face. It is set to NULL if there is no bitmap strike. Note that FreeType tries to sanitize the strike data since they are sometimes sloppy or incorrect, but this can easily fail. num_charmaps The number of charmaps in the face. charmaps An array of the charmaps of the face. generic A field reserved for client uses. See the FT_Generic type description. bbox The font bounding box. Coordinates are expressed in font units (see units_per_EM ). The box is large enough to contain any glyph from the font. Thus, bbox.yMax can be seen as the maximum ascender , and bbox.yMin as the minimum descender . Only relevant for scalable formats. Note that the bounding box might be off by (at least) one pixel for hinted fonts. See FT_Size_Metrics for further discussion. units_per_EM The number of font units per EM square for this face. This is typically 2048 for TrueType fonts, and 1000 for Type 1 fonts. Only relevant for scalable formats. ascender The typographic ascender of the face, expressed in font units. For font formats not having this information, it is set to bbox.yMax . Only relevant for scalable formats. descender The typographic descender of the face, expressed in font units. For font formats not having this information, it is set to bbox.yMin . Note that this field is negative for values below the baseline. Only relevant for scalable formats. height This value is the vertical distance between two consecutive baselines, expressed in font units. It is always positive. Only relevant for scalable formats. If you want the global glyph height, use ascender - descender . max_advance_width The maximum advance width, in font units, for all glyphs in this face. This can be used to make word wrapping computations faster. Only relevant for scalable formats. max_advance_height The maximum advance height, in font units, for all glyphs in this face. This is only relevant for vertical layouts, and is set to height for fonts that do not provide vertical metrics. Only relevant for scalable formats. underline_position The position, in font units, of the underline line for this face. It is the center of the underlining stem. Only relevant for scalable formats. underline_thickness The thickness, in font units, of the underline for this face. Only relevant for scalable formats. glyph The face's associated glyph slot(s). size The current active size for this face. charmap The current active charmap for this face. note Fields may be changed after a call to FT_Attach_File or FT_Attach_Stream . For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an MVAR table: ascender , descender , height , underline_position , and underline_thickness . Especially for TrueType fonts see also the documentation for FT_Size_Metrics . FT_HAS_HORIZONTAL Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_HORIZONTAL ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_HORIZONTAL ) A macro that returns true whenever a face object contains horizontal metrics (this is true for all font formats though). also FT_HAS_VERTICAL can be used to check for vertical metrics. FT_HAS_VERTICAL Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_VERTICAL ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_VERTICAL ) A macro that returns true whenever a face object contains real vertical metrics (and not only synthesized ones). FT_HAS_KERNING Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_KERNING ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_KERNING ) A macro that returns true whenever a face object contains kerning data that can be accessed with FT_Get_Kerning . FT_HAS_FIXED_SIZES Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_FIXED_SIZES ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_FIXED_SIZES ) A macro that returns true whenever a face object contains some embedded bitmaps. See the available_sizes field of the FT_FaceRec structure. FT_HAS_GLYPH_NAMES Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_GLYPH_NAMES ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_GLYPH_NAMES ) A macro that returns true whenever a face object contains some glyph names that can be accessed through FT_Get_Glyph_Name . FT_HAS_COLOR Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_COLOR ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_COLOR ) A macro that returns true whenever a face object contains tables for color glyphs. since 2.5.1 FT_HAS_MULTIPLE_MASTERS Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_MULTIPLE_MASTERS ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_MULTIPLE_MASTERS ) A macro that returns true whenever a face object contains some multiple masters. The functions provided by FT_MULTIPLE_MASTERS_H are then available to choose the exact design you want. FT_IS_SFNT Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_SFNT ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_SFNT ) A macro that returns true whenever a face object contains a font whose format is based on the SFNT storage scheme. This usually means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded bitmap fonts. If this macro is true, all functions defined in FT_SFNT_NAMES_H and FT_TRUETYPE_TABLES_H are available. FT_IS_SCALABLE Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_SCALABLE ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_SCALABLE ) A macro that returns true whenever a face object contains a scalable font face (true for TrueType, Type 1, Type 42, CID, OpenType/CFF, and PFR font formats). FT_IS_FIXED_WIDTH Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_FIXED_WIDTH ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_FIXED_WIDTH ) A macro that returns true whenever a face object contains a font face that contains fixed-width (or monospace , fixed-pitch , etc.) glyphs. FT_IS_CID_KEYED Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_CID_KEYED ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_CID_KEYED ) A macro that returns true whenever a face object contains a CID-keyed font. See the discussion of FT_FACE_FLAG_CID_KEYED for more details. If this macro is true, all functions defined in FT_CID_H are available. FT_IS_TRICKY Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_TRICKY ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_TRICKY ) A macro that returns true whenever a face represents a tricky font. See the discussion of FT_FACE_FLAG_TRICKY for more details. FT_IS_NAMED_INSTANCE Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_NAMED_INSTANCE ( face ) \\ ( (face)- face_index 0x7FFF0000L ) A macro that returns true whenever a face object is a named instance of a GX or OpenType variation font. [Since 2.9] Changing the design coordinates with FT_Set_Var_Design_Coordinates or FT_Set_Var_Blend_Coordinates does not influence the return value of this macro (only FT_Set_Named_Instance does that). since 2.7 FT_IS_VARIATION Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_VARIATION ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_VARIATION ) A macro that returns true whenever a face object has been altered by FT_Set_MM_Design_Coordinates , FT_Set_Var_Design_Coordinates , or FT_Set_Var_Blend_Coordinates . since 2.9 FT_SizeRec Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_SizeRec_ { FT_Face face; /* parent face object */ FT_Generic generic; /* generic pointer for client uses */ FT_Size_Metrics metrics; /* size metrics */ FT_Size_Internal internal; } FT_SizeRec ; FreeType root size class structure. A size object models a face object at a given size. fields face Handle to the parent face object. generic A typeless pointer, unused by the FreeType library or any of its drivers. It can be used by client applications to link their own data to each size object. metrics Metrics for this size object. This field is read-only. FT_Size_Metrics Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_Metrics_ { FT_UShort x_ppem; /* horizontal pixels per EM */ FT_UShort y_ppem; /* vertical pixels per EM */ FT_Fixed x_scale; /* scaling values used to convert font */ FT_Fixed y_scale; /* units to 26.6 fractional pixels */ FT_Pos ascender; /* ascender in 26.6 frac. pixels */ FT_Pos descender; /* descender in 26.6 frac. pixels */ FT_Pos height; /* text height in 26.6 frac. pixels */ FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */ } FT_Size_Metrics ; The size metrics structure gives the metrics of a size object. fields x_ppem The width of the scaled EM square in pixels, hence the term ppem (pixels per EM). It is also referred to as nominal width . y_ppem The height of the scaled EM square in pixels, hence the term ppem (pixels per EM). It is also referred to as nominal height . x_scale A 16.16 fractional scaling value to convert horizontal metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats. y_scale A 16.16 fractional scaling value to convert vertical metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats. ascender The ascender in 26.6 fractional pixels, rounded up to an integer value. See FT_FaceRec for the details. descender The descender in 26.6 fractional pixels, rounded down to an integer value. See FT_FaceRec for the details. height The height in 26.6 fractional pixels, rounded to an integer value. See FT_FaceRec for the details. max_advance The maximum advance width in 26.6 fractional pixels, rounded to an integer value. See FT_FaceRec for the details. note The scaling values, if relevant, are determined first during a size changing operation. The remaining fields are then set by the driver. For scalable formats, they are usually set to scaled values of the corresponding fields in FT_FaceRec . Some values like ascender or descender are rounded for historical reasons; more precise values (for outline fonts) can be derived by scaling the corresponding FT_FaceRec values manually, with code similar to the following. scaled_ascender = FT_MulFix( face- ascender, size_metrics- y_scale ); Note that due to glyph hinting and the selected rendering mode these values are usually not exact; consequently, they must be treated as unreliable with an error margin of at least one pixel! Indeed, the only way to get the exact metrics is to render all glyphs. As this would be a definite performance hit, it is up to client applications to perform such computations. The FT_Size_Metrics structure is valid for bitmap fonts also. TrueType fonts with native bytecode hinting All applications that handle TrueType fonts with native hinting must be aware that TTFs expect different rounding of vertical font dimensions. The application has to cater for this, especially if it wants to rely on a TTF's vertical data (for example, to properly align box characters vertically). Only the application knows in advance that it is going to use native hinting for TTFs! FreeType, on the other hand, selects the hinting mode not at the time of creating an FT_Size object but much later, namely while calling FT_Load_Glyph . Here is some pseudo code that illustrates a possible solution. font_format = FT_Get_Font_Format( face ); if ( !strcmp( font_format, TrueType ) do_native_bytecode_hinting ) { ascender = ROUND( FT_MulFix( face- ascender, size_metrics- y_scale ) ); descender = ROUND( FT_MulFix( face- descender, size_metrics- y_scale ) ); } else { ascender = size_metrics- ascender; descender = size_metrics- descender; } height = size_metrics- height; max_advance = size_metrics- max_advance; FT_GlyphSlotRec Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_GlyphSlotRec_ { FT_Library library; FT_Face face; FT_GlyphSlot next; FT_UInt glyph_index; /* new in 2.10; was reserved previously */ FT_Generic generic; FT_Glyph_Metrics metrics; FT_Fixed linearHoriAdvance; FT_Fixed linearVertAdvance; FT_Vector advance; FT_Glyph_Format format; FT_Bitmap bitmap; FT_Int bitmap_left; FT_Int bitmap_top; FT_Outline outline; FT_UInt num_subglyphs; FT_SubGlyph subglyphs; void * control_data; long control_len; FT_Pos lsb_delta; FT_Pos rsb_delta; void * other; FT_Slot_Internal internal; } FT_GlyphSlotRec ; FreeType root glyph slot class structure. A glyph slot is a container where individual glyphs can be loaded, be they in outline or bitmap format. fields library A handle to the FreeType library instance this slot belongs to. face A handle to the parent face object. next In some cases (like some font tools), several glyph slots per face object can be a good thing. As this is rare, the glyph slots are listed through a direct, single-linked list using its next field. glyph_index [Since 2.10] The glyph index passed as an argument to FT_Load_Glyph while initializing the glyph slot. generic A typeless pointer unused by the FreeType library or any of its drivers. It can be used by client applications to link their own data to each glyph slot object. metrics The metrics of the last loaded glyph in the slot. The returned values depend on the last load flags (see the FT_Load_Glyph API function) and can be expressed either in 26.6 fractional pixels or font units. Note that even when the glyph image is transformed, the metrics are not. linearHoriAdvance The advance width of the unhinted glyph. Its value is expressed in 16.16 fractional pixels, unless FT_LOAD_LINEAR_DESIGN is set when loading the glyph. This field can be important to perform correct WYSIWYG layout. Only relevant for outline glyphs. linearVertAdvance The advance height of the unhinted glyph. Its value is expressed in 16.16 fractional pixels, unless FT_LOAD_LINEAR_DESIGN is set when loading the glyph. This field can be important to perform correct WYSIWYG layout. Only relevant for outline glyphs. advance This shorthand is, depending on FT_LOAD_IGNORE_TRANSFORM , the transformed (hinted) advance width for the glyph, in 26.6 fractional pixel format. As specified with FT_LOAD_VERTICAL_LAYOUT , it uses either the horiAdvance or the vertAdvance value of metrics field. format This field indicates the format of the image contained in the glyph slot. Typically FT_GLYPH_FORMAT_BITMAP , FT_GLYPH_FORMAT_OUTLINE , or FT_GLYPH_FORMAT_COMPOSITE , but other values are possible. bitmap This field is used as a bitmap descriptor. Note that the address and content of the bitmap buffer can change between calls of FT_Load_Glyph and a few other functions. bitmap_left The bitmap's left bearing expressed in integer pixels. bitmap_top The bitmap's top bearing expressed in integer pixels. This is the distance from the baseline to the top-most glyph scanline, upwards y coordinates being positive . outline The outline descriptor for the current glyph image if its format is FT_GLYPH_FORMAT_OUTLINE . Once a glyph is loaded, outline can be transformed, distorted, emboldened, etc. However, it must not be freed. num_subglyphs The number of subglyphs in a composite glyph. This field is only valid for the composite glyph format that should normally only be loaded with the FT_LOAD_NO_RECURSE flag. subglyphs An array of subglyph descriptors for composite glyphs. There are num_subglyphs elements in there. Currently internal to FreeType. control_data Certain font drivers can also return the control data for a given glyph image (e.g. TrueType bytecode, Type 1 charstrings, etc.). This field is a pointer to such data; it is currently internal to FreeType. control_len This is the length in bytes of the control data. Currently internal to FreeType. other Reserved. lsb_delta The difference between hinted and unhinted left side bearing while auto-hinting is active. Zero otherwise. rsb_delta The difference between hinted and unhinted right side bearing while auto-hinting is active. Zero otherwise. note If FT_Load_Glyph is called with default flags (see FT_LOAD_DEFAULT ) the glyph image is loaded in the glyph slot in its native format (e.g., an outline glyph for TrueType and Type 1 formats). [Since 2.9] The prospective bitmap metrics are calculated according to FT_LOAD_TARGET_XXX and other flags even for the outline glyph, even if FT_LOAD_RENDER is not set. This image can later be converted into a bitmap by calling FT_Render_Glyph . This function searches the current renderer for the native image's format, then invokes it. The renderer is in charge of transforming the native image through the slot's face transformation fields, then converting it into a bitmap that is returned in slot- bitmap . Note that slot- bitmap_left and slot- bitmap_top are also used to specify the position of the bitmap relative to the current pen position (e.g., coordinates (0,0) on the baseline). Of course, slot- format is also changed to FT_GLYPH_FORMAT_BITMAP . Here is a small pseudo code fragment that shows how to use lsb_delta and rsb_delta to do fractional positioning of glyphs: FT_GlyphSlot slot = face- glyph; FT_Pos origin_x = 0; for all glyphs do load glyph with `FT_Load_Glyph FT_Outline_Translate( slot- outline, origin_x 63, 0 ); save glyph image, or render glyph, or ... compute kern between current and next glyph and add it to `origin_x origin_x += slot- advance.x; origin_x += slot- lsb_delta - slot- rsb_delta; endfor Here is another small pseudo code fragment that shows how to use lsb_delta and rsb_delta to improve integer positioning of glyphs: FT_GlyphSlot slot = face- glyph; FT_Pos origin_x = 0; FT_Pos prev_rsb_delta = 0; for all glyphs do compute kern between current and previous glyph and add it to `origin_x load glyph with `FT_Load_Glyph if ( prev_rsb_delta - slot- lsb_delta 32 ) origin_x -= 64; else if ( prev_rsb_delta - slot- lsb_delta -31 ) origin_x += 64; prev_rsb_delta = slot- rsb_delta; save glyph image, or render glyph, or ... origin_x += slot- advance.x; endfor If you use strong auto-hinting, you must apply these delta values! Otherwise you will experience far too large inter-glyph spacing at small rendering sizes in most cases. Note that it doesn't harm to use the above code for other hinting modes also, since the delta values are zero then. FT_Glyph_Metrics Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Glyph_Metrics_ { FT_Pos width; FT_Pos height; FT_Pos horiBearingX; FT_Pos horiBearingY; FT_Pos horiAdvance; FT_Pos vertBearingX; FT_Pos vertBearingY; FT_Pos vertAdvance; } FT_Glyph_Metrics ; A structure to model the metrics of a single glyph. The values are expressed in 26.6 fractional pixel format; if the flag FT_LOAD_NO_SCALE has been used while loading the glyph, values are expressed in font units instead. fields width The glyph's width. height The glyph's height. horiBearingX Left side bearing for horizontal layout. horiBearingY Top side bearing for horizontal layout. horiAdvance Advance width for horizontal layout. vertBearingX Left side bearing for vertical layout. vertBearingY Top side bearing for vertical layout. Larger positive values mean further below the vertical glyph origin. vertAdvance Advance height for vertical layout. Positive values mean the glyph has a positive advance downward. note If not disabled with FT_LOAD_NO_HINTING , the values represent dimensions of the hinted glyph (in case hinting is applicable). Stroking a glyph with an outside border does not increase horiAdvance or vertAdvance ; you have to manually adjust these values to account for the added width and height. FreeType doesn't use the VORG table data for CFF fonts because it doesn't have an interface to quickly retrieve the glyph height. The y coordinate of the vertical origin can be simply computed as vertBearingY + height after loading a glyph. FT_SubGlyph Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_SubGlyphRec_* FT_SubGlyph ; The subglyph structure is an internal object used to describe subglyphs (for example, in the case of composites). note The subglyph implementation is not part of the high-level API, hence the forward structure declaration. You can however retrieve subglyph information with FT_Get_SubGlyph_Info . FT_Bitmap_Size Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Bitmap_Size_ { FT_Short height; FT_Short width; FT_Pos size; FT_Pos x_ppem; FT_Pos y_ppem; } FT_Bitmap_Size ; This structure models the metrics of a bitmap strike (i.e., a set of glyphs for a given point size and resolution) in a bitmap font. It is used for the available_sizes field of FT_Face . fields height The vertical distance, in pixels, between two consecutive baselines. It is always positive. width The average width, in pixels, of all glyphs in the strike. size The nominal size of the strike in 26.6 fractional points. This field is not very useful. x_ppem The horizontal ppem (nominal width) in 26.6 fractional pixels. y_ppem The vertical ppem (nominal height) in 26.6 fractional pixels. note Windows FNT: The nominal size given in a FNT font is not reliable. If the driver finds it incorrect, it sets size to some calculated values, and x_ppem and y_ppem to the pixel width and height given in the font, respectively. TrueType embedded bitmaps: size , width , and height values are not contained in the bitmap strike itself. They are computed from the global font parameters. FT_Init_FreeType Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Init_FreeType ( FT_Library *alibrary ); Initialize a new FreeType library object. The set of modules that are registered by this function is determined at build time. output alibrary A handle to a new library object. return FreeType error code. 0 means success. note In case you want to provide your own memory allocating routines, use FT_New_Library instead, followed by a call to FT_Add_Default_Modules (or a series of calls to FT_Add_Module ) and FT_Set_Default_Properties . See the documentation of FT_Library and FT_Face for multi-threading issues. If you need reference-counting (cf. FT_Reference_Library ), use FT_New_Library and FT_Done_Library . If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the FREETYPE_PROPERTIES environment variable to control driver properties. See section Driver properties for more. FT_Done_FreeType Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Done_FreeType ( FT_Library library ); Destroy a given FreeType library object and all of its children, including resources, drivers, faces, sizes, etc. input library A handle to the target library object. return FreeType error code. 0 means success. FT_New_Face Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_New_Face ( FT_Library library, const char * filepathname, FT_Long face_index, FT_Face *aface ); Call FT_Open_Face to open a font by its pathname. inout library A handle to the library resource. input pathname A path to the font file. face_index See FT_Open_Face for a detailed description of this parameter. output aface A handle to a new face object. If face_index is greater than or equal to zero, it must be non- NULL . return FreeType error code. 0 means success. note Use FT_Done_Face to destroy the created FT_Face object (along with its slot and sizes). FT_Done_Face Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Done_Face ( FT_Face face ); Discard a given face object, as well as all of its child slots and sizes. input face A handle to a target face object. return FreeType error code. 0 means success. note See the discussion of reference counters in the description of FT_Reference_Face . FT_Reference_Face Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Reference_Face ( FT_Face face ); A counter gets initialized to 1 at the time an FT_Face structure is created. This function increments the counter. FT_Done_Face then only destroys a face if the counter is 1, otherwise it simply decrements the counter. This function helps in managing life-cycles of structures that reference FT_Face objects. input face A handle to a target face object. return FreeType error code. 0 means success. since 2.4.2 FT_New_Memory_Face Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_New_Memory_Face ( FT_Library library, const FT_Byte * file_base, FT_Long file_size, FT_Long face_index, FT_Face *aface ); Call FT_Open_Face to open a font that has been loaded into memory. inout library A handle to the library resource. input file_base A pointer to the beginning of the font data. file_size The size of the memory chunk used by the font data. face_index See FT_Open_Face for a detailed description of this parameter. output aface A handle to a new face object. If face_index is greater than or equal to zero, it must be non- NULL . return FreeType error code. 0 means success. note You must not deallocate the memory before calling FT_Done_Face . FT_Face_Properties Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Face_Properties ( FT_Face face, FT_UInt num_properties, FT_Parameter * properties ); Set or override certain (library or module-wide) properties on a face-by-face basis. Useful for finer-grained control and avoiding locks on shared structures (threads can modify their own faces as they see fit). Contrary to FT_Property_Set , this function uses FT_Parameter so that you can pass multiple properties to the target face in one call. Note that only a subset of the available properties can be controlled. FT_PARAM_TAG_STEM_DARKENING (stem darkening, corresponding to the property no-stem-darkening provided by the autofit , cff , type1 , and t1cid modules; see no-stem-darkening ). FT_PARAM_TAG_LCD_FILTER_WEIGHTS (LCD filter weights, corresponding to function FT_Library_SetLcdFilterWeights ). FT_PARAM_TAG_RANDOM_SEED (seed value for the CFF, Type 1, and CID random operator, corresponding to the random-seed property provided by the cff , type1 , and t1cid modules; see random-seed ). Pass NULL as data in FT_Parameter for a given tag to reset the option and use the library or module default again. input face A handle to the source face object. num_properties The number of properties that follow. properties A handle to an FT_Parameter array with num_properties elements. return FreeType error code. 0 means success. example Here is an example that sets three properties. You must define FT_CONFIG_OPTION_SUBPIXEL_RENDERING to make the LCD filter examples work. FT_Parameter property1; FT_Bool darken_stems = 1; FT_Parameter property2; FT_LcdFiveTapFilter custom_weight = { 0x11, 0x44, 0x56, 0x44, 0x11 }; FT_Parameter property3; FT_Int32 random_seed = 314159265; FT_Parameter properties[3] = { property1, property2, property3 }; property1.tag = FT_PARAM_TAG_STEM_DARKENING; property1.data = darken_stems; property2.tag = FT_PARAM_TAG_LCD_FILTER_WEIGHTS; property2.data = custom_weight; property3.tag = FT_PARAM_TAG_RANDOM_SEED; property3.data = random_seed; FT_Face_Properties( face, 3, properties ); The next example resets a single property to its default value. FT_Parameter property; property.tag = FT_PARAM_TAG_LCD_FILTER_WEIGHTS; property.data = NULL; FT_Face_Properties( face, 1, property ); since 2.8 FT_Open_Face Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Open_Face ( FT_Library library, const FT_Open_Args * args, FT_Long face_index, FT_Face *aface ); Create a face object from a given resource described by FT_Open_Args . inout library A handle to the library resource. input args A pointer to an FT_Open_Args structure that must be filled by the caller. face_index This field holds two different values. Bits 0-15 are the index of the face in the font file (starting with value 0). Set it to 0 if there is only one face in the font file. [Since 2.6.1] Bits 16-30 are relevant to GX and OpenType variation fonts only, specifying the named instance index for the current face index (starting with value 1; value 0 makes FreeType ignore named instances). For non-variation fonts, bits 16-30 are ignored. Assuming that you want to access the third named instance in face 4, face_index should be set to 0x00030004. If you want to access face 4 without variation handling, simply set face_index to value 4. FT_Open_Face and its siblings can be used to quickly check whether the font format of a given font resource is supported by FreeType. In general, if the face_index argument is negative, the function's return value is 0 if the font format is recognized, or non-zero otherwise. The function allocates a more or less empty face handle in *aface (if aface isn't NULL ); the only two useful fields in this special case are face- num_faces and face- style_flags . For any negative value of face_index , face- num_faces gives the number of faces within the font file. For the negative value -(N+1) (with N a non-negative 16-bit value), bits 16-30 in face- style_flags give the number of named instances in face N if we have a variation font (or zero otherwise). After examination, the returned FT_Face structure should be deallocated with a call to FT_Done_Face . output aface A handle to a new face object. If face_index is greater than or equal to zero, it must be non- NULL . return FreeType error code. 0 means success. note Unlike FreeType 1.x, this function automatically creates a glyph slot for the face object that can be accessed directly through face- glyph . Each new face object created with this function also owns a default FT_Size object, accessible as face- size . One FT_Library instance can have multiple face objects, this is, FT_Open_Face and its siblings can be called multiple times using the same library argument. See the discussion of reference counters in the description of FT_Reference_Face . example To loop over all faces, use code similar to the following snippet (omitting the error handling). ... FT_Face face; FT_Long i, num_faces; error = FT_Open_Face( library, args, -1, face ); if ( error ) { ... } num_faces = face- num_faces; FT_Done_Face( face ); for ( i = 0; i num_faces; i++ ) { ... error = FT_Open_Face( library, args, i, face ); ... FT_Done_Face( face ); ... } To loop over all valid values for face_index , use something similar to the following snippet, again without error handling. The code accesses all faces immediately (thus only a single call of FT_Open_Face within the do-loop), with and without named instances. ... FT_Face face; FT_Long num_faces = 0; FT_Long num_instances = 0; FT_Long face_idx = 0; FT_Long instance_idx = 0; do { FT_Long id = ( instance_idx 16 ) + face_idx; error = FT_Open_Face( library, args, id, face ); if ( error ) { ... } num_faces = face- num_faces; num_instances = face- style_flags 16; ... FT_Done_Face( face ); if ( instance_idx num_instances ) instance_idx++; else { face_idx++; instance_idx = 0; } } while ( face_idx num_faces ) FT_Open_Args Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Open_Args_ { FT_UInt flags; const FT_Byte * memory_base; FT_Long memory_size; FT_String * pathname; FT_Stream stream; FT_Module driver; FT_Int num_params; FT_Parameter * params; } FT_Open_Args ; A structure to indicate how to open a new font file or stream. A pointer to such a structure can be used as a parameter for the functions FT_Open_Face and FT_Attach_Stream . fields flags A set of bit flags indicating how to use the structure. memory_base The first byte of the file in memory. memory_size The size in bytes of the file in memory. pathname A pointer to an 8-bit file pathname. stream A handle to a source stream object. driver This field is exclusively used by FT_Open_Face ; it simply specifies the font driver to use for opening the face. If set to NULL , FreeType tries to load the face with each one of the drivers in its list. num_params The number of extra parameters. params Extra parameters passed to the font driver when opening a new face. note The stream type is determined by the contents of flags that are tested in the following order by FT_Open_Face : If the FT_OPEN_MEMORY bit is set, assume that this is a memory file of memory_size bytes, located at memory_address . The data are not copied, and the client is responsible for releasing and destroying them after the corresponding call to FT_Done_Face . Otherwise, if the FT_OPEN_STREAM bit is set, assume that a custom input stream stream is used. Otherwise, if the FT_OPEN_PATHNAME bit is set, assume that this is a normal file and use pathname to open it. If the FT_OPEN_DRIVER bit is set, FT_Open_Face only tries to open the file with the driver whose handler is in driver . If the FT_OPEN_PARAMS bit is set, the parameters given by num_params and params is used. They are ignored otherwise. Ideally, both the pathname and params fields should be tagged as const ; this is missing for API backward compatibility. In other words, applications should treat them as read-only. FT_Parameter Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Parameter_ { FT_ULong tag; FT_Pointer data; } FT_Parameter ; A simple structure to pass more or less generic parameters to FT_Open_Face and FT_Face_Properties . fields tag A four-byte identification tag. data A pointer to the parameter data. note The ID and function of parameters are driver-specific. See section Parameter Tags for more information. FT_Attach_File Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Attach_File ( FT_Face face, const char * filepathname ); Call FT_Attach_Stream to attach a file. inout face The target face object. input filepathname The pathname. return FreeType error code. 0 means success. FT_Attach_Stream Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Attach_Stream ( FT_Face face, FT_Open_Args * parameters ); Attach data to a face object. Normally, this is used to read additional information for the face object. For example, you can attach an AFM file that comes with a Type 1 font to get the kerning values and other metrics. inout face The target face object. input parameters A pointer to FT_Open_Args that must be filled by the caller. return FreeType error code. 0 means success. note The meaning of the attach (i.e., what really happens when the new file is read) is not fixed by FreeType itself. It really depends on the font format (and thus the font driver). Client applications are expected to know what they are doing when invoking this function. Most drivers simply do not implement file or stream attachments. FT_Set_Char_Size Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Set_Char_Size ( FT_Face face, FT_F26Dot6 char_width, FT_F26Dot6 char_height, FT_UInt horz_resolution, FT_UInt vert_resolution ); Call FT_Request_Size to request the nominal size (in points). inout face A handle to a target face object. input char_width The nominal width, in 26.6 fractional points. char_height The nominal height, in 26.6 fractional points. horz_resolution The horizontal resolution in dpi. vert_resolution The vertical resolution in dpi. return FreeType error code. 0 means success. note While this function allows fractional points as input values, the resulting ppem value for the given resolution is always rounded to the nearest integer. If either the character width or height is zero, it is set equal to the other value. If either the horizontal or vertical resolution is zero, it is set equal to the other value. A character width or height smaller than 1pt is set to 1pt; if both resolution values are zero, they are set to 72dpi. Don't use this function if you are using the FreeType cache API. FT_Set_Pixel_Sizes Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Set_Pixel_Sizes ( FT_Face face, FT_UInt pixel_width, FT_UInt pixel_height ); Call FT_Request_Size to request the nominal size (in pixels). inout face A handle to the target face object. input pixel_width The nominal width, in pixels. pixel_height The nominal height, in pixels. return FreeType error code. 0 means success. note You should not rely on the resulting glyphs matching or being constrained to this pixel size. Refer to FT_Request_Size to understand how requested sizes relate to actual sizes. Don't use this function if you are using the FreeType cache API. FT_Request_Size Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Request_Size ( FT_Face face, FT_Size_Request req ); Resize the scale of the active FT_Size object in a face. inout face A handle to a target face object. input req A pointer to a FT_Size_RequestRec . return FreeType error code. 0 means success. note Although drivers may select the bitmap strike matching the request, you should not rely on this if you intend to select a particular bitmap strike. Use FT_Select_Size instead in that case. The relation between the requested size and the resulting glyph size is dependent entirely on how the size is defined in the source face. The font designer chooses the final size of each glyph relative to this size. For more information refer to https://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html . Contrary to FT_Set_Char_Size , this function doesn't have special code to normalize zero-valued widths, heights, or resolutions (which lead to errors in most cases). Don't use this function if you are using the FreeType cache API. FT_Select_Size Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Select_Size ( FT_Face face, FT_Int strike_index ); Select a bitmap strike. To be more precise, this function sets the scaling factors of the active FT_Size object in a face so that bitmaps from this particular strike are taken by FT_Load_Glyph and friends. inout face A handle to a target face object. input strike_index The index of the bitmap strike in the available_sizes field of FT_FaceRec structure. return FreeType error code. 0 means success. note For bitmaps embedded in outline fonts it is common that only a subset of the available glyphs at a given ppem value is available. FreeType silently uses outlines if there is no bitmap for a given glyph index. For GX and OpenType variation fonts, a bitmap strike makes sense only if the default instance is active (this is, no glyph variation takes place); otherwise, FreeType simply ignores bitmap strikes. The same is true for all named instances that are different from the default instance. Don't use this function if you are using the FreeType cache API. FT_Size_Request_Type Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Size_Request_Type_ { FT_SIZE_REQUEST_TYPE_NOMINAL , FT_SIZE_REQUEST_TYPE_REAL_DIM , FT_SIZE_REQUEST_TYPE_BBOX , FT_SIZE_REQUEST_TYPE_CELL , FT_SIZE_REQUEST_TYPE_SCALES , FT_SIZE_REQUEST_TYPE_MAX } FT_Size_Request_Type ; An enumeration type that lists the supported size request types, i.e., what input size (in font units) maps to the requested output size (in pixels, as computed from the arguments of FT_Size_Request ). values FT_SIZE_REQUEST_TYPE_NOMINAL The nominal size. The units_per_EM field of FT_FaceRec is used to determine both scaling values. This is the standard scaling found in most applications. In particular, use this size request type for TrueType fonts if they provide optical scaling or something similar. Note, however, that units_per_EM is a rather abstract value which bears no relation to the actual size of the glyphs in a font. FT_SIZE_REQUEST_TYPE_REAL_DIM The real dimension. The sum of the ascender and (minus of) the descender fields of FT_FaceRec is used to determine both scaling values. FT_SIZE_REQUEST_TYPE_BBOX The font bounding box. The width and height of the bbox field of FT_FaceRec are used to determine the horizontal and vertical scaling value, respectively. FT_SIZE_REQUEST_TYPE_CELL The max_advance_width field of FT_FaceRec is used to determine the horizontal scaling value; the vertical scaling value is determined the same way as FT_SIZE_REQUEST_TYPE_REAL_DIM does. Finally, both scaling values are set to the smaller one. This type is useful if you want to specify the font size for, say, a window of a given dimension and 80x24 cells. FT_SIZE_REQUEST_TYPE_SCALES Specify the scaling values directly. note The above descriptions only apply to scalable formats. For bitmap formats, the behaviour is up to the driver. See the note section of FT_Size_Metrics if you wonder how size requesting relates to scaling values. FT_Size_RequestRec Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_RequestRec_ { FT_Size_Request_Type type; FT_Long width; FT_Long height; FT_UInt horiResolution; FT_UInt vertResolution; } FT_Size_RequestRec ; A structure to model a size request. fields type See FT_Size_Request_Type . width The desired width, given as a 26.6 fractional point value (with 72pt = 1in). height The desired height, given as a 26.6 fractional point value (with 72pt = 1in). horiResolution The horizontal resolution (dpi, i.e., pixels per inch). If set to zero, width is treated as a 26.6 fractional pixel value, which gets internally rounded to an integer. vertResolution The vertical resolution (dpi, i.e., pixels per inch). If set to zero, height is treated as a 26.6 fractional pixel value, which gets internally rounded to an integer. note If width is zero, the horizontal scaling value is set equal to the vertical scaling value, and vice versa. If type is FT_SIZE_REQUEST_TYPE_SCALES , width and height are interpreted directly as 16.16 fractional scaling values, without any further modification, and both horiResolution and vertResolution are ignored. FT_Size_Request Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_RequestRec_ * FT_Size_Request ; A handle to a size request structure. FT_Set_Transform Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( void ) FT_Set_Transform ( FT_Face face, FT_Matrix * matrix, FT_Vector * delta ); Set the transformation that is applied to glyph images when they are loaded into a glyph slot through FT_Load_Glyph . inout face A handle to the source face object. input matrix A pointer to the transformation's 2x2 matrix. Use NULL for the identity matrix. delta A pointer to the translation vector. Use NULL for the null vector. note The transformation is only applied to scalable image formats after the glyph has been loaded. It means that hinting is unaltered by the transformation and is performed on the character size given in the last call to FT_Set_Char_Size or FT_Set_Pixel_Sizes . Note that this also transforms the face.glyph.advance field, but not the values in face.glyph.metrics . FT_Load_Glyph Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Load_Glyph ( FT_Face face, FT_UInt glyph_index, FT_Int32 load_flags ); Load a glyph into the glyph slot of a face object. inout face A handle to the target face object where the glyph is loaded. input glyph_index The index of the glyph in the font file. For CID-keyed fonts (either in PS or in CFF format) this argument specifies the CID value. load_flags A flag indicating what to load for this glyph. The FT_LOAD_XXX constants can be used to control the glyph loading process (e.g., whether the outline should be scaled, whether to load bitmaps or not, whether to hint the outline, etc). return FreeType error code. 0 means success. note The loaded glyph may be transformed. See FT_Set_Transform for the details. For subsetted CID-keyed fonts, FT_Err_Invalid_Argument is returned for invalid CID values (this is, for CID values that don't have a corresponding glyph in the font). See the discussion of the FT_FACE_FLAG_CID_KEYED flag for more details. If you receive FT_Err_Glyph_Too_Big , try getting the glyph outline at EM size, then scale it manually and fill it as a graphics operation. FT_Get_Char_Index Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt ) FT_Get_Char_Index ( FT_Face face, FT_ULong charcode ); Return the glyph index of a given character code. This function uses the currently selected charmap to do the mapping. input face A handle to the source face object. charcode The character code. return The glyph index. 0 means undefined character code . note If you use FreeType to manipulate the contents of font files directly, be aware that the glyph index returned by this function doesn't always correspond to the internal indices used within the file. This is done to ensure that value 0 always corresponds to the missing glyph . If the first glyph is not named .notdef , then for Type 1 and Type 42 fonts, .notdef will be moved into the glyph ID 0 position, and whatever was there will be moved to the position .notdef had. For Type 1 fonts, if there is no .notdef glyph at all, then one will be created at index 0 and whatever was there will be moved to the last index -- Type 42 fonts are considered invalid under this condition. FT_Get_First_Char Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_ULong ) FT_Get_First_Char ( FT_Face face, FT_UInt *agindex ); Return the first character code in the current charmap of a given face, together with its corresponding glyph index. input face A handle to the source face object. output agindex Glyph index of first character code. 0 if charmap is empty. return The charmap's first character code. note You should use this function together with FT_Get_Next_Char to parse all character codes available in a given charmap. The code should look like this: FT_ULong charcode; FT_UInt gindex; charcode = FT_Get_First_Char( face, gindex ); while ( gindex != 0 ) { ... do something with (charcode,gindex) pair ... charcode = FT_Get_Next_Char( face, charcode, gindex ); } Be aware that character codes can have values up to 0xFFFFFFFF; this might happen for non-Unicode or malformed cmaps. However, even with regular Unicode encoding, so-called last resort fonts (using SFNT cmap format 13, see function FT_Get_CMap_Format ) normally have entries for all Unicode characters up to 0x1FFFFF, which can cause a lot of iterations. Note that *agindex is set to 0 if the charmap is empty. The result itself can be 0 in two cases: if the charmap is empty or if the value 0 is the first valid character code. FT_Get_Next_Char Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_ULong ) FT_Get_Next_Char ( FT_Face face, FT_ULong char_code, FT_UInt *agindex ); Return the next character code in the current charmap of a given face following the value char_code , as well as the corresponding glyph index. input face A handle to the source face object. char_code The starting character code. output agindex Glyph index of next character code. 0 if charmap is empty. return The charmap's next character code. note You should use this function with FT_Get_First_Char to walk over all character codes available in a given charmap. See the note for that function for a simple code example. Note that *agindex is set to 0 when there are no more codes in the charmap. FT_Get_Name_Index Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt ) FT_Get_Name_Index ( FT_Face face, FT_String * glyph_name ); Return the glyph index of a given glyph name. input face A handle to the source face object. glyph_name The glyph name. return The glyph index. 0 means undefined character code . FT_Load_Char Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Load_Char ( FT_Face face, FT_ULong char_code, FT_Int32 load_flags ); Load a glyph into the glyph slot of a face object, accessed by its character code. inout face A handle to a target face object where the glyph is loaded. input char_code The glyph's character code, according to the current charmap used in the face. load_flags A flag indicating what to load for this glyph. The FT_LOAD_XXX constants can be used to control the glyph loading process (e.g., whether the outline should be scaled, whether to load bitmaps or not, whether to hint the outline, etc). return FreeType error code. 0 means success. note This function simply calls FT_Get_Char_Index and FT_Load_Glyph . Many fonts contain glyphs that can't be loaded by this function since its glyph indices are not listed in any of the font's charmaps. If no active cmap is set up (i.e., face- charmap is zero), the call to FT_Get_Char_Index is omitted, and the function behaves identically to FT_Load_Glyph . FT_LOAD_TARGET_MODE Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_LOAD_TARGET_MODE ( x ) ( ( FT_Render_Mode )( ( (x) 16 ) 15 ) ) Return the FT_Render_Mode corresponding to a given FT_LOAD_TARGET_XXX value. FT_Render_Glyph Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Render_Glyph ( FT_GlyphSlot slot, FT_Render_Mode render_mode ); Convert a given glyph image to a bitmap. It does so by inspecting the glyph image format, finding the relevant renderer, and invoking it. inout slot A handle to the glyph slot containing the image to convert. input render_mode The render mode used to render the glyph image into a bitmap. See FT_Render_Mode for a list of possible values. If FT_RENDER_MODE_NORMAL is used, a previous call of FT_Load_Glyph with flag FT_LOAD_COLOR makes FT_Render_Glyph provide a default blending of colored glyph layers associated with the current glyph slot (provided the font contains such layers) instead of rendering the glyph slot's outline. This is an experimental feature; see FT_LOAD_COLOR for more information. return FreeType error code. 0 means success. note To get meaningful results, font scaling values must be set with functions like FT_Set_Char_Size before calling FT_Render_Glyph . When FreeType outputs a bitmap of a glyph, it really outputs an alpha coverage map. If a pixel is completely covered by a filled-in outline, the bitmap contains 0xFF at that pixel, meaning that 0xFF/0xFF fraction of that pixel is covered, meaning the pixel is 100% black (or 0% bright). If a pixel is only 50% covered (value 0x80), the pixel is made 50% black (50% bright or a middle shade of grey). 0% covered means 0% black (100% bright or white). On high-DPI screens like on smartphones and tablets, the pixels are so small that their chance of being completely covered and therefore completely black are fairly good. On the low-DPI screens, however, the situation is different. The pixels are too large for most of the details of a glyph and shades of gray are the norm rather than the exception. This is relevant because all our screens have a second problem: they are not linear. 1 + 1 is not 2. Twice the value does not result in twice the brightness. When a pixel is only 50% covered, the coverage map says 50% black, and this translates to a pixel value of 128 when you use 8 bits per channel (0-255). However, this does not translate to 50% brightness for that pixel on our sRGB and gamma 2.2 screens. Due to their non-linearity, they dwell longer in the darks and only a pixel value of about 186 results in 50% brightness -- 128 ends up too dark on both bright and dark backgrounds. The net result is that dark text looks burnt-out, pixely and blotchy on bright background, bright text too frail on dark backgrounds, and colored text on colored background (for example, red on green) seems to have dark halos or dirt around it. The situation is especially ugly for diagonal stems like in w glyph shapes where the quality of FreeType's anti-aliasing depends on the correct display of grays. On high-DPI screens where smaller, fully black pixels reign supreme, this doesn't matter, but on our low-DPI screens with all the gray shades, it does. 0% and 100% brightness are the same things in linear and non-linear space, just all the shades in-between aren't. The blending function for placing text over a background is dst = alpha * src + (1 - alpha) * dst , which is known as the OVER operator. To correctly composite an antialiased pixel of a glyph onto a surface, take the foreground and background colors (e.g., in sRGB space) and apply gamma to get them in a linear space, use OVER to blend the two linear colors using the glyph pixel as the alpha value (remember, the glyph bitmap is an alpha coverage bitmap), and apply inverse gamma to the blended pixel and write it back to the image. Internal testing at Adobe found that a target inverse gamma of 1.8 for step 3 gives good results across a wide range of displays with an sRGB gamma curve or a similar one. This process can cost performance. There is an approximation that does not need to know about the background color; see https://bel.fi/alankila/lcd/ and https://bel.fi/alankila/lcd/alpcor.html for details. ATTENTION : Linear blending is even more important when dealing with subpixel-rendered glyphs to prevent color-fringing! A subpixel-rendered glyph must first be filtered with a filter that gives equal weight to the three color primaries and does not exceed a sum of 0x100, see section Subpixel Rendering . Then the only difference to gray linear blending is that subpixel-rendered linear blending is done 3 times per pixel: red foreground subpixel to red background subpixel and so on for green and blue. FT_Render_Mode Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Render_Mode_ { FT_RENDER_MODE_NORMAL = 0, FT_RENDER_MODE_LIGHT , FT_RENDER_MODE_MONO , FT_RENDER_MODE_LCD , FT_RENDER_MODE_LCD_V , FT_RENDER_MODE_MAX } FT_Render_Mode ; /* these constants are deprecated; use the corresponding */ /* ` FT_Render_Mode ` values instead */ # define ft_render_mode_normal FT_RENDER_MODE_NORMAL # define ft_render_mode_mono FT_RENDER_MODE_MONO Render modes supported by FreeType 2. Each mode corresponds to a specific type of scanline conversion performed on the outline. For bitmap fonts and embedded bitmaps the bitmap- pixel_mode field in the FT_GlyphSlotRec structure gives the format of the returned bitmap. All modes except FT_RENDER_MODE_MONO use 256 levels of opacity, indicating pixel coverage. Use linear alpha blending and gamma correction to correctly render non-monochrome glyph bitmaps onto a surface; see FT_Render_Glyph . values FT_RENDER_MODE_NORMAL Default render mode; it corresponds to 8-bit anti-aliased bitmaps. FT_RENDER_MODE_LIGHT This is equivalent to FT_RENDER_MODE_NORMAL . It is only defined as a separate value because render modes are also used indirectly to define hinting algorithm selectors. See FT_LOAD_TARGET_XXX for details. FT_RENDER_MODE_MONO This mode corresponds to 1-bit bitmaps (with 2 levels of opacity). FT_RENDER_MODE_LCD This mode corresponds to horizontal RGB and BGR subpixel displays like LCD screens. It produces 8-bit bitmaps that are 3 times the width of the original glyph outline in pixels, and which use the FT_PIXEL_MODE_LCD mode. FT_RENDER_MODE_LCD_V This mode corresponds to vertical RGB and BGR subpixel displays (like PDA screens, rotated LCD displays, etc.). It produces 8-bit bitmaps that are 3 times the height of the original glyph outline in pixels and use the FT_PIXEL_MODE_LCD_V mode. note Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your ftoption.h , which enables patented ClearType-style rendering, the LCD-optimized glyph bitmaps should be filtered to reduce color fringes inherent to this technology. You can either set up LCD filtering with FT_Library_SetLcdFilter or FT_Face_Properties , or do the filtering yourself. The default FreeType LCD rendering technology does not require filtering. The selected render mode only affects vector glyphs of a font. Embedded bitmaps often have a different pixel mode like FT_PIXEL_MODE_MONO . You can use FT_Bitmap_Convert to transform them into 8-bit pixmaps. FT_Get_Kerning Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_Kerning ( FT_Face face, FT_UInt left_glyph, FT_UInt right_glyph, FT_UInt kern_mode, FT_Vector *akerning ); Return the kerning vector between two glyphs of the same face. input face A handle to a source face object. left_glyph The index of the left glyph in the kern pair. right_glyph The index of the right glyph in the kern pair. kern_mode See FT_Kerning_Mode for more information. Determines the scale and dimension of the returned kerning vector. output akerning The kerning vector. This is either in font units, fractional pixels (26.6 format), or pixels for scalable formats, and in pixels for fixed-sizes formats. return FreeType error code. 0 means success. note Only horizontal layouts (left-to-right right-to-left) are supported by this method. Other layouts, or more sophisticated kernings, are out of the scope of this API function -- they can be implemented through format-specific interfaces. Kerning for OpenType fonts implemented in a GPOS table is not supported; use FT_HAS_KERNING to find out whether a font has data that can be extracted with FT_Get_Kerning . FT_Kerning_Mode Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Kerning_Mode_ { FT_KERNING_DEFAULT = 0, FT_KERNING_UNFITTED , FT_KERNING_UNSCALED } FT_Kerning_Mode ; /* these constants are deprecated; use the corresponding */ /* ` FT_Kerning_Mode ` values instead */ # define ft_kerning_default FT_KERNING_DEFAULT # define ft_kerning_unfitted FT_KERNING_UNFITTED # define ft_kerning_unscaled FT_KERNING_UNSCALED An enumeration to specify the format of kerning values returned by FT_Get_Kerning . values FT_KERNING_DEFAULT Return grid-fitted kerning distances in 26.6 fractional pixels. FT_KERNING_UNFITTED Return un-grid-fitted kerning distances in 26.6 fractional pixels. FT_KERNING_UNSCALED Return the kerning vector in original font units. note FT_KERNING_DEFAULT returns full pixel values; it also makes FreeType heuristically scale down kerning distances at small ppem values so that they don't become too big. Both FT_KERNING_DEFAULT and FT_KERNING_UNFITTED use the current horizontal scaling factor (as set e.g. with FT_Set_Char_Size ) to convert font units to pixels. FT_Get_Track_Kerning Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_Track_Kerning ( FT_Face face, FT_Fixed point_size, FT_Int degree, FT_Fixed * akerning ); Return the track kerning for a given face object at a given size. input face A handle to a source face object. point_size The point size in 16.16 fractional points. degree The degree of tightness. Increasingly negative values represent tighter track kerning, while increasingly positive values represent looser track kerning. Value zero means no track kerning. output akerning The kerning in 16.16 fractional points, to be uniformly applied between all glyphs. return FreeType error code. 0 means success. note Currently, only the Type 1 font driver supports track kerning, using data from AFM files (if attached with FT_Attach_File or FT_Attach_Stream ). Only very few AFM files come with track kerning data; please refer to Adobe's AFM specification for more details. FT_Get_Glyph_Name Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_Glyph_Name ( FT_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ); Retrieve the ASCII name of a given glyph in a face. This only works for those faces where FT_HAS_GLYPH_NAMES (face) returns 1. input face A handle to a source face object. glyph_index The glyph index. buffer_max The maximum number of bytes available in the buffer. output buffer A pointer to a target buffer where the name is copied to. return FreeType error code. 0 means success. note An error is returned if the face doesn't provide glyph names or if the glyph index is invalid. In all cases of failure, the first byte of buffer is set to 0 to indicate an empty name. The glyph name is truncated to fit within the buffer if it is too long. The returned string is always zero-terminated. Be aware that FreeType reorders glyph indices internally so that glyph index 0 always corresponds to the missing glyph (called .notdef ). This function always returns an error if the config macro FT_CONFIG_OPTION_NO_GLYPH_NAMES is not defined in ftoption.h . FT_Get_Postscript_Name Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( const char * ) FT_Get_Postscript_Name ( FT_Face face ); Retrieve the ASCII PostScript name of a given face, if available. This only works with PostScript, TrueType, and OpenType fonts. input face A handle to the source face object. return A pointer to the face's PostScript name. NULL if unavailable. note The returned pointer is owned by the face and is destroyed with it. For variation fonts, this string changes if you select a different instance, and you have to call FT_Get_PostScript_Name again to retrieve it. FreeType follows Adobe TechNote #5902, Generating PostScript Names for Fonts Using OpenType Font Variations . https://download.macromedia.com/pub/developer/opentype/tech-notes/5902.AdobePSNameGeneration.html [Since 2.9] Special PostScript names for named instances are only returned if the named instance is set with FT_Set_Named_Instance (and the font has corresponding entries in its fvar table). If FT_IS_VARIATION returns true, the algorithmically derived PostScript name is provided, not looking up special entries for named instances. FT_CharMapRec Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_CharMapRec_ { FT_Face face; FT_Encoding encoding; FT_UShort platform_id; FT_UShort encoding_id; } FT_CharMapRec ; The base charmap structure. fields face A handle to the parent face object. encoding An FT_Encoding tag identifying the charmap. Use this with FT_Select_Charmap . platform_id An ID number describing the platform for the following encoding ID. This comes directly from the TrueType specification and gets emulated for other formats. encoding_id A platform-specific encoding number. This also comes from the TrueType specification and gets emulated similarly. FT_Select_Charmap Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Select_Charmap ( FT_Face face, FT_Encoding encoding ); Select a given charmap by its encoding tag (as listed in freetype.h ). inout face A handle to the source face object. input encoding A handle to the selected encoding. return FreeType error code. 0 means success. note This function returns an error if no charmap in the face corresponds to the encoding queried here. Because many fonts contain more than a single cmap for Unicode encoding, this function has some special code to select the one that covers Unicode best ( best in the sense that a UCS-4 cmap is preferred to a UCS-2 cmap). It is thus preferable to FT_Set_Charmap in this case. FT_Set_Charmap Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Set_Charmap ( FT_Face face, FT_CharMap charmap ); Select a given charmap for character code to glyph index mapping. inout face A handle to the source face object. input charmap A handle to the selected charmap. return FreeType error code. 0 means success. note This function returns an error if the charmap is not part of the face (i.e., if it is not listed in the face- charmaps table). It also fails if an OpenType type 14 charmap is selected (which doesn't map character codes to glyph indices at all). FT_Get_Charmap_Index Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Int ) FT_Get_Charmap_Index ( FT_CharMap charmap ); Retrieve index of a given charmap. input charmap A handle to a charmap. return The index into the array of character maps within the face to which charmap belongs. If an error occurs, -1 is returned. FT_Get_FSType_Flags Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UShort ) FT_Get_FSType_Flags ( FT_Face face ); Return the fsType flags for a font. input face A handle to the source face object. return The fsType flags, see FT_FSTYPE_XXX . note Use this function rather than directly reading the fs_type field in the PS_FontInfoRec structure, which is only guaranteed to return the correct results for Type 1 fonts. since 2.3.8 FT_Get_SubGlyph_Info Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_SubGlyph_Info ( FT_GlyphSlot glyph, FT_UInt sub_index, FT_Int *p_index, FT_UInt *p_flags, FT_Int *p_arg1, FT_Int *p_arg2, FT_Matrix *p_transform ); Retrieve a description of a given subglyph. Only use it if glyph- format is FT_GLYPH_FORMAT_COMPOSITE ; an error is returned otherwise. input glyph The source glyph slot. sub_index The index of the subglyph. Must be less than glyph- num_subglyphs . output p_index The glyph index of the subglyph. p_flags The subglyph flags, see FT_SUBGLYPH_FLAG_XXX . p_arg1 The subglyph's first argument (if any). p_arg2 The subglyph's second argument (if any). p_transform The subglyph transformation (if any). return FreeType error code. 0 means success. note The values of *p_arg1 , *p_arg2 , and *p_transform must be interpreted depending on the flags returned in *p_flags . See the OpenType specification for details. https://docs.microsoft.com/en-us/typography/opentype/spec/glyf#composite-glyph-description FT_Face_Internal Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Face_InternalRec_* FT_Face_Internal ; An opaque handle to an FT_Face_InternalRec structure that models the private data of a given FT_Face object. This structure might change between releases of FreeType 2 and is not generally available to client applications. FT_Size_Internal Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_InternalRec_* FT_Size_Internal ; An opaque handle to an FT_Size_InternalRec structure, used to model private data of a given FT_Size object. FT_Slot_Internal Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Slot_InternalRec_* FT_Slot_Internal ; An opaque handle to an FT_Slot_InternalRec structure, used to model private data of a given FT_GlyphSlot object. FT_FACE_FLAG_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_FACE_FLAG_SCALABLE ( 1L 0 ) # define FT_FACE_FLAG_FIXED_SIZES ( 1L 1 ) # define FT_FACE_FLAG_FIXED_WIDTH ( 1L 2 ) # define FT_FACE_FLAG_SFNT ( 1L 3 ) # define FT_FACE_FLAG_HORIZONTAL ( 1L 4 ) # define FT_FACE_FLAG_VERTICAL ( 1L 5 ) # define FT_FACE_FLAG_KERNING ( 1L 6 ) # define FT_FACE_FLAG_FAST_GLYPHS ( 1L 7 ) # define FT_FACE_FLAG_MULTIPLE_MASTERS ( 1L 8 ) # define FT_FACE_FLAG_GLYPH_NAMES ( 1L 9 ) # define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L 10 ) # define FT_FACE_FLAG_HINTER ( 1L 11 ) # define FT_FACE_FLAG_CID_KEYED ( 1L 12 ) # define FT_FACE_FLAG_TRICKY ( 1L 13 ) # define FT_FACE_FLAG_COLOR ( 1L 14 ) # define FT_FACE_FLAG_VARIATION ( 1L 15 ) A list of bit flags used in the face_flags field of the FT_FaceRec structure. They inform client applications of properties of the corresponding face. values FT_FACE_FLAG_SCALABLE The face contains outline glyphs. Note that a face can contain bitmap strikes also, i.e., a face can have both this flag and FT_FACE_FLAG_FIXED_SIZES set. FT_FACE_FLAG_FIXED_SIZES The face contains bitmap strikes. See also the num_fixed_sizes and available_sizes fields of FT_FaceRec . FT_FACE_FLAG_FIXED_WIDTH The face contains fixed-width characters (like Courier, Lucida, MonoType, etc.). FT_FACE_FLAG_SFNT The face uses the SFNT storage scheme. For now, this means TrueType and OpenType. FT_FACE_FLAG_HORIZONTAL The face contains horizontal glyph metrics. This should be set for all common formats. FT_FACE_FLAG_VERTICAL The face contains vertical glyph metrics. This is only available in some formats, not all of them. FT_FACE_FLAG_KERNING The face contains kerning information. If set, the kerning distance can be retrieved using the function FT_Get_Kerning . Otherwise the function always return the vector (0,0). Note that FreeType doesn't handle kerning data from the SFNT GPOS table (as present in many OpenType fonts). FT_FACE_FLAG_FAST_GLYPHS THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT. FT_FACE_FLAG_MULTIPLE_MASTERS The face contains multiple masters and is capable of interpolating between them. Supported formats are Adobe MM, TrueType GX, and OpenType variation fonts. See section Multiple Masters for API details. FT_FACE_FLAG_GLYPH_NAMES The face contains glyph names, which can be retrieved using FT_Get_Glyph_Name . Note that some TrueType fonts contain broken glyph name tables. Use the function FT_Has_PS_Glyph_Names when needed. FT_FACE_FLAG_EXTERNAL_STREAM Used internally by FreeType to indicate that a face's stream was provided by the client application and should not be destroyed when FT_Done_Face is called. Don't read or test this flag. FT_FACE_FLAG_HINTER The font driver has a hinting machine of its own. For example, with TrueType fonts, it makes sense to use data from the SFNT gasp table only if the native TrueType hinting engine (with the bytecode interpreter) is available and active. FT_FACE_FLAG_CID_KEYED The face is CID-keyed. In that case, the face is not accessed by glyph indices but by CID values. For subsetted CID-keyed fonts this has the consequence that not all index values are a valid argument to FT_Load_Glyph . Only the CID values for which corresponding glyphs in the subsetted font exist make FT_Load_Glyph return successfully; in all other cases you get an FT_Err_Invalid_Argument error. Note that CID-keyed fonts that are in an SFNT wrapper (this is, all OpenType/CFF fonts) don't have this flag set since the glyphs are accessed in the normal way (using contiguous indices); the CID-ness isn't visible to the application. FT_FACE_FLAG_TRICKY The face is tricky , this is, it always needs the font format's native hinting engine to get a reasonable result. A typical example is the old Chinese font mingli.ttf (but not mingliu.ttc ) that uses TrueType bytecode instructions to move and scale all of its subglyphs. It is not possible to auto-hint such fonts using FT_LOAD_FORCE_AUTOHINT ; it will also ignore FT_LOAD_NO_HINTING . You have to set both FT_LOAD_NO_HINTING and FT_LOAD_NO_AUTOHINT to really disable hinting; however, you probably never want this except for demonstration purposes. Currently, there are about a dozen TrueType fonts in the list of tricky fonts; they are hard-coded in file ttobjs.c . FT_FACE_FLAG_COLOR [Since 2.5.1] The face has color glyph tables. See FT_LOAD_COLOR for more information. FT_FACE_FLAG_VARIATION [Since 2.9] Set if the current face (or named instance) has been altered with FT_Set_MM_Design_Coordinates , FT_Set_Var_Design_Coordinates , or FT_Set_Var_Blend_Coordinates . This flag is unset by a call to FT_Set_Named_Instance . FT_STYLE_FLAG_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_STYLE_FLAG_ITALIC ( 1 0 ) # define FT_STYLE_FLAG_BOLD ( 1 1 ) A list of bit flags to indicate the style of a given face. These are used in the style_flags field of FT_FaceRec . values FT_STYLE_FLAG_ITALIC The face style is italic or oblique. FT_STYLE_FLAG_BOLD The face is bold. note The style information as provided by FreeType is very basic. More details are beyond the scope and should be done on a higher level (for example, by analyzing various fields of the OS/2 table in SFNT based fonts). FT_OPEN_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_OPEN_MEMORY 0x1 # define FT_OPEN_STREAM 0x2 # define FT_OPEN_PATHNAME 0x4 # define FT_OPEN_DRIVER 0x8 # define FT_OPEN_PARAMS 0x10 /* these constants are deprecated; use the corresponding ` FT_OPEN_XXX ` */ /* values instead */ # define ft_open_memory FT_OPEN_MEMORY # define ft_open_stream FT_OPEN_STREAM # define ft_open_pathname FT_OPEN_PATHNAME # define ft_open_driver FT_OPEN_DRIVER # define ft_open_params FT_OPEN_PARAMS A list of bit field constants used within the flags field of the FT_Open_Args structure. values FT_OPEN_MEMORY This is a memory-based stream. FT_OPEN_STREAM Copy the stream from the stream field. FT_OPEN_PATHNAME Create a new input stream from a C path name. FT_OPEN_DRIVER Use the driver field. FT_OPEN_PARAMS Use the num_params and params fields. note The FT_OPEN_MEMORY , FT_OPEN_STREAM , and FT_OPEN_PATHNAME flags are mutually exclusive. FT_LOAD_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_LOAD_DEFAULT 0x0 # define FT_LOAD_NO_SCALE ( 1L 0 ) # define FT_LOAD_NO_HINTING ( 1L 1 ) # define FT_LOAD_RENDER ( 1L 2 ) # define FT_LOAD_NO_BITMAP ( 1L 3 ) # define FT_LOAD_VERTICAL_LAYOUT ( 1L 4 ) # define FT_LOAD_FORCE_AUTOHINT ( 1L 5 ) # define FT_LOAD_CROP_BITMAP ( 1L 6 ) # define FT_LOAD_PEDANTIC ( 1L 7 ) # define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ( 1L 9 ) # define FT_LOAD_NO_RECURSE ( 1L 10 ) # define FT_LOAD_IGNORE_TRANSFORM ( 1L 11 ) # define FT_LOAD_MONOCHROME ( 1L 12 ) # define FT_LOAD_LINEAR_DESIGN ( 1L 13 ) # define FT_LOAD_NO_AUTOHINT ( 1L 15 ) /* Bits 16-19 are used by `FT_LOAD_TARGET_` */ # define FT_LOAD_COLOR ( 1L 20 ) # define FT_LOAD_COMPUTE_METRICS ( 1L 21 ) # define FT_LOAD_BITMAP_METRICS_ONLY ( 1L 22 ) A list of bit field constants for FT_Load_Glyph to indicate what kind of operations to perform during glyph loading. values FT_LOAD_DEFAULT Corresponding to 0, this value is used as the default glyph load operation. In this case, the following happens: FreeType looks for a bitmap for the glyph corresponding to the face's current size. If one is found, the function returns. The bitmap data can be accessed from the glyph slot (see note below). If no embedded bitmap is searched for or found, FreeType looks for a scalable outline. If one is found, it is loaded from the font file, scaled to device pixels, then hinted to the pixel grid in order to optimize it. The outline data can be accessed from the glyph slot (see note below). Note that by default the glyph loader doesn't render outlines into bitmaps. The following flags are used to modify this default behaviour to more specific and useful cases. FT_LOAD_NO_SCALE Don't scale the loaded outline glyph but keep it in font units. This flag implies FT_LOAD_NO_HINTING and FT_LOAD_NO_BITMAP , and unsets FT_LOAD_RENDER . If the font is tricky (see FT_FACE_FLAG_TRICKY for more), using FT_LOAD_NO_SCALE usually yields meaningless outlines because the subglyphs must be scaled and positioned with hinting instructions. This can be solved by loading the font without FT_LOAD_NO_SCALE and setting the character size to font- units_per_EM . FT_LOAD_NO_HINTING Disable hinting. This generally generates blurrier bitmap glyphs when the glyph are rendered in any of the anti-aliased modes. See also the note below. This flag is implied by FT_LOAD_NO_SCALE . FT_LOAD_RENDER Call FT_Render_Glyph after the glyph is loaded. By default, the glyph is rendered in FT_RENDER_MODE_NORMAL mode. This can be overridden by FT_LOAD_TARGET_XXX or FT_LOAD_MONOCHROME . This flag is unset by FT_LOAD_NO_SCALE . FT_LOAD_NO_BITMAP Ignore bitmap strikes when loading. Bitmap-only fonts ignore this flag. FT_LOAD_NO_SCALE always sets this flag. FT_LOAD_VERTICAL_LAYOUT Load the glyph for vertical text layout. In particular, the advance value in the FT_GlyphSlotRec structure is set to the vertAdvance value of the metrics field. In case FT_HAS_VERTICAL doesn't return true, you shouldn't use this flag currently. Reason is that in this case vertical metrics get synthesized, and those values are not always consistent across various font formats. FT_LOAD_FORCE_AUTOHINT Prefer the auto-hinter over the font's native hinter. See also the note below. FT_LOAD_PEDANTIC Make the font driver perform pedantic verifications during glyph loading and hinting. This is mostly used to detect broken glyphs in fonts. By default, FreeType tries to handle broken fonts also. In particular, errors from the TrueType bytecode engine are not passed to the application if this flag is not set; this might result in partially hinted or distorted glyphs in case a glyph's bytecode is buggy. FT_LOAD_NO_RECURSE Don't load composite glyphs recursively. Instead, the font driver fills the num_subglyph and subglyphs values of the glyph slot; it also sets glyph- format to FT_GLYPH_FORMAT_COMPOSITE . The description of subglyphs can then be accessed with FT_Get_SubGlyph_Info . Don't use this flag for retrieving metrics information since some font drivers only return rudimentary data. This flag implies FT_LOAD_NO_SCALE and FT_LOAD_IGNORE_TRANSFORM . FT_LOAD_IGNORE_TRANSFORM Ignore the transform matrix set by FT_Set_Transform . FT_LOAD_MONOCHROME This flag is used with FT_LOAD_RENDER to indicate that you want to render an outline glyph to a 1-bit monochrome bitmap glyph, with 8 pixels packed into each byte of the bitmap data. Note that this has no effect on the hinting algorithm used. You should rather use FT_LOAD_TARGET_MONO so that the monochrome-optimized hinting algorithm is used. FT_LOAD_LINEAR_DESIGN Keep linearHoriAdvance and linearVertAdvance fields of FT_GlyphSlotRec in font units. See FT_GlyphSlotRec for details. FT_LOAD_NO_AUTOHINT Disable the auto-hinter. See also the note below. FT_LOAD_COLOR Load colored glyphs. There are slight differences depending on the font format. [Since 2.5] Load embedded color bitmap images. The resulting color bitmaps, if available, will have the FT_PIXEL_MODE_BGRA format, with pre-multiplied color channels. If the flag is not set and color bitmaps are found, they are converted to 256-level gray bitmaps, using the FT_PIXEL_MODE_GRAY format. [Since 2.10, experimental] If the glyph index contains an entry in the face's COLR table with a CPAL palette table (as defined in the OpenType specification), make FT_Render_Glyph provide a default blending of the color glyph layers associated with the glyph index, using the same bitmap format as embedded color bitmap images. This is mainly for convenience; for full control of color layers use FT_Get_Color_Glyph_Layer and FreeType's color functions like FT_Palette_Select instead of setting FT_LOAD_COLOR for rendering so that the client application can handle blending by itself. FT_LOAD_COMPUTE_METRICS [Since 2.6.1] Compute glyph metrics from the glyph data, without the use of bundled metrics tables (for example, the hdmx table in TrueType fonts). This flag is mainly used by font validating or font editing applications, which need to ignore, verify, or edit those tables. Currently, this flag is only implemented for TrueType fonts. FT_LOAD_BITMAP_METRICS_ONLY [Since 2.7.1] Request loading of the metrics and bitmap image information of a (possibly embedded) bitmap glyph without allocating or copying the bitmap image data itself. No effect if the target glyph is not a bitmap image. This flag unsets FT_LOAD_RENDER . FT_LOAD_CROP_BITMAP Ignored. Deprecated. FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH Ignored. Deprecated. note By default, hinting is enabled and the font's native hinter (see FT_FACE_FLAG_HINTER ) is preferred over the auto-hinter. You can disable hinting by setting FT_LOAD_NO_HINTING or change the precedence by setting FT_LOAD_FORCE_AUTOHINT . You can also set FT_LOAD_NO_AUTOHINT in case you don't want the auto-hinter to be used at all. See the description of FT_FACE_FLAG_TRICKY for a special exception (affecting only a handful of Asian fonts). Besides deciding which hinter to use, you can also decide which hinting algorithm to use. See FT_LOAD_TARGET_XXX for details. Note that the auto-hinter needs a valid Unicode cmap (either a native one or synthesized by FreeType) for producing correct results. If a font provides an incorrect mapping (for example, assigning the character code U+005A, LATIN CAPITAL LETTER Z, to a glyph depicting a mathematical integral sign), the auto-hinter might produce useless results. FT_LOAD_TARGET_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_LOAD_TARGET_( x ) ( ( FT_Int32 )( (x) 15 ) 16 ) # define FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL ) # define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT ) # define FT_LOAD_TARGET_MONO FT_LOAD_TARGET_( FT_RENDER_MODE_MONO ) # define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD ) # define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V ) A list of values to select a specific hinting algorithm for the hinter. You should OR one of these values to your load_flags when calling FT_Load_Glyph . Note that a font's native hinters may ignore the hinting algorithm you have specified (e.g., the TrueType bytecode interpreter). You can set FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used. values FT_LOAD_TARGET_NORMAL The default hinting algorithm, optimized for standard gray-level rendering. For monochrome output, use FT_LOAD_TARGET_MONO instead. FT_LOAD_TARGET_LIGHT A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by FreeType's new CFF engine or Microsoft's ClearType font renderer. This preserves inter-glyph spacing in horizontal text. The snapping is done either by the native font driver, if the driver itself and the font support it, or by the auto-hinter. Advance widths are rounded to integer values; however, using the lsb_delta and rsb_delta fields of FT_GlyphSlotRec , it is possible to get fractional advance widths for subpixel positioning (which is recommended to use). If configuration option AF_CONFIG_OPTION_TT_SIZE_METRICS is active, TrueType-like metrics are used to make this mode behave similarly as in unpatched FreeType versions between 2.4.6 and 2.7.1 (inclusive). FT_LOAD_TARGET_MONO Strong hinting algorithm that should only be used for monochrome output. The result is probably unpleasant if the glyph is rendered in non-monochrome modes. Note that for outline fonts only the TrueType font driver has proper monochrome hinting support, provided the TTFs contain hints for B/W rendering (which most fonts no longer provide). If these conditions are not met it is very likely that you get ugly results at smaller sizes. FT_LOAD_TARGET_LCD A variant of FT_LOAD_TARGET_LIGHT optimized for horizontally decimated LCD displays. FT_LOAD_TARGET_LCD_V A variant of FT_LOAD_TARGET_NORMAL optimized for vertically decimated LCD displays. note You should use only one of the FT_LOAD_TARGET_XXX values in your load_flags . They can't be ORed. If FT_LOAD_RENDER is also set, the glyph is rendered in the corresponding mode (i.e., the mode that matches the used algorithm best). An exception is FT_LOAD_TARGET_MONO since it implies FT_LOAD_MONOCHROME . You can use a hinting algorithm that doesn't correspond to the same rendering mode. As an example, it is possible to use the light hinting algorithm and have the results rendered in horizontal LCD pixel mode, with code like FT_Load_Glyph( face, glyph_index, load_flags | FT_LOAD_TARGET_LIGHT ); FT_Render_Glyph( face- glyph, FT_RENDER_MODE_LCD ); In general, you should stick with one rendering mode. For example, switching between FT_LOAD_TARGET_NORMAL and FT_LOAD_TARGET_MONO enforces a lot of recomputation for TrueType fonts, which is slow. Another reason is caching: Selecting a different mode usually causes changes in both the outlines and the rasterized bitmaps; it is thus necessary to empty the cache after a mode switch to avoid false hits. FT_SUBGLYPH_FLAG_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1 # define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2 # define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4 # define FT_SUBGLYPH_FLAG_SCALE 8 # define FT_SUBGLYPH_FLAG_XY_SCALE 0x40 # define FT_SUBGLYPH_FLAG_2X2 0x80 # define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200 A list of constants describing subglyphs. Please refer to the glyf table description in the OpenType specification for the meaning of the various flags (which get synthesized for non-OpenType subglyphs). https://docs.microsoft.com/en-us/typography/opentype/spec/glyf#composite-glyph-description values FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID FT_SUBGLYPH_FLAG_SCALE FT_SUBGLYPH_FLAG_XY_SCALE FT_SUBGLYPH_FLAG_2X2 FT_SUBGLYPH_FLAG_USE_MY_METRICS FT_FSTYPE_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000 # define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING 0x0002 # define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004 # define FT_FSTYPE_EDITABLE_EMBEDDING 0x0008 # define FT_FSTYPE_NO_SUBSETTING 0x0100 # define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200 A list of bit flags used in the fsType field of the OS/2 table in a TrueType or OpenType font and the FSType entry in a PostScript font. These bit flags are returned by FT_Get_FSType_Flags ; they inform client applications of embedding and subsetting restrictions associated with a font. See https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf for more details. values FT_FSTYPE_INSTALLABLE_EMBEDDING Fonts with no fsType bit set may be embedded and permanently installed on the remote system by an application. FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING Fonts that have only this bit set must not be modified, embedded or exchanged in any manner without first obtaining permission of the font software copyright owner. FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING The font may be embedded and temporarily loaded on the remote system. Documents containing Preview Print fonts must be opened read-only ; no edits can be applied to the document. FT_FSTYPE_EDITABLE_EMBEDDING The font may be embedded but must only be installed temporarily on other systems. In contrast to Preview Print fonts, documents containing editable fonts may be opened for reading, editing is permitted, and changes may be saved. FT_FSTYPE_NO_SUBSETTING The font may not be subsetted prior to embedding. FT_FSTYPE_BITMAP_EMBEDDING_ONLY Only bitmaps contained in the font may be embedded; no outline data may be embedded. If there are no bitmaps available in the font, then the font is unembeddable. note The flags are ORed together, thus more than a single value can be returned. While the fsType flags can indicate that a font may be embedded, a license with the font vendor may be separately required to use the font in this way. FT_HAS_FAST_GLYPHS Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_FAST_GLYPHS ( face ) 0 Deprecated.","title":"Base Interface"},{"location":"ft2-base_interface.html#base-interface","text":"","title":"Base Interface"},{"location":"ft2-base_interface.html#synopsis","text":"This section describes the most important public high-level API functions of FreeType 2.","title":"Synopsis"},{"location":"ft2-base_interface.html#ft_library","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_LibraryRec_ * FT_Library ; A handle to a FreeType library instance. Each library is completely independent from the others; it is the root of a set of objects like fonts, faces, sizes, etc. It also embeds a memory manager (see FT_Memory ), as well as a scan-line converter object (see FT_Raster ). [Since 2.5.6] In multi-threaded applications it is easiest to use one FT_Library object per thread. In case this is too cumbersome, a single FT_Library object across threads is possible also, as long as a mutex lock is used around FT_New_Face and FT_Done_Face .","title":"FT_Library"},{"location":"ft2-base_interface.html#ft_face","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_FaceRec_* FT_Face ; A handle to a typographic face object. A face object models a given typeface, in a given style.","title":"FT_Face"},{"location":"ft2-base_interface.html#ft_size","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_SizeRec_* FT_Size ; A handle to an object that models a face scaled to a given character size.","title":"FT_Size"},{"location":"ft2-base_interface.html#ft_glyphslot","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_GlyphSlotRec_* FT_GlyphSlot ; A handle to a given glyph slot . A slot is a container that can hold any of the glyphs contained in its parent face. In other words, each time you call FT_Load_Glyph or FT_Load_Char , the slot's content is erased by the new glyph data, i.e., the glyph's metrics, its image (bitmap or outline), and other control information.","title":"FT_GlyphSlot"},{"location":"ft2-base_interface.html#ft_charmap","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_CharMapRec_* FT_CharMap ; A handle to a character map (usually abbreviated to charmap ). A charmap is used to translate character codes in a given encoding into glyph indexes for its parent's face. Some font formats may provide several charmaps per font. Each face object owns zero or more charmaps, but only one of them can be active , providing the data used by FT_Get_Char_Index or FT_Load_Char . The list of available charmaps in a face is available through the face- num_charmaps and face- charmaps fields of FT_FaceRec . The currently active charmap is available as face- charmap . You should call FT_Set_Charmap to change it.","title":"FT_CharMap"},{"location":"ft2-base_interface.html#ft_encoding","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Encoding_ { FT_ENC_TAG ( FT_ENCODING_NONE , 0, 0, 0, 0 ), FT_ENC_TAG ( FT_ENCODING_MS_SYMBOL , 's', 'y', 'm', 'b' ), FT_ENC_TAG ( FT_ENCODING_UNICODE , 'u', 'n', 'i', 'c' ), FT_ENC_TAG ( FT_ENCODING_SJIS , 's', 'j', 'i', 's' ), FT_ENC_TAG ( FT_ENCODING_PRC , 'g', 'b', ' ', ' ' ), FT_ENC_TAG ( FT_ENCODING_BIG5 , 'b', 'i', 'g', '5' ), FT_ENC_TAG ( FT_ENCODING_WANSUNG , 'w', 'a', 'n', 's' ), FT_ENC_TAG ( FT_ENCODING_JOHAB , 'j', 'o', 'h', 'a' ), /* for backward compatibility */ FT_ENCODING_GB2312 = FT_ENCODING_PRC , FT_ENCODING_MS_SJIS = FT_ENCODING_SJIS , FT_ENCODING_MS_GB2312 = FT_ENCODING_PRC , FT_ENCODING_MS_BIG5 = FT_ENCODING_BIG5 , FT_ENCODING_MS_WANSUNG = FT_ENCODING_WANSUNG , FT_ENCODING_MS_JOHAB = FT_ENCODING_JOHAB , FT_ENC_TAG ( FT_ENCODING_ADOBE_STANDARD , 'A', 'D', 'O', 'B' ), FT_ENC_TAG ( FT_ENCODING_ADOBE_EXPERT , 'A', 'D', 'B', 'E' ), FT_ENC_TAG ( FT_ENCODING_ADOBE_CUSTOM , 'A', 'D', 'B', 'C' ), FT_ENC_TAG ( FT_ENCODING_ADOBE_LATIN_1 , 'l', 'a', 't', '1' ), FT_ENC_TAG ( FT_ENCODING_OLD_LATIN_2 , 'l', 'a', 't', '2' ), FT_ENC_TAG ( FT_ENCODING_APPLE_ROMAN , 'a', 'r', 'm', 'n' ) } FT_Encoding ; /* these constants are deprecated; use the corresponding ` FT_Encoding ` */ /* values instead */ # define ft_encoding_none FT_ENCODING_NONE # define ft_encoding_unicode FT_ENCODING_UNICODE # define ft_encoding_symbol FT_ENCODING_MS_SYMBOL # define ft_encoding_latin_1 FT_ENCODING_ADOBE_LATIN_1 # define ft_encoding_latin_2 FT_ENCODING_OLD_LATIN_2 # define ft_encoding_sjis FT_ENCODING_SJIS # define ft_encoding_gb2312 FT_ENCODING_PRC # define ft_encoding_big5 FT_ENCODING_BIG5 # define ft_encoding_wansung FT_ENCODING_WANSUNG # define ft_encoding_johab FT_ENCODING_JOHAB # define ft_encoding_adobe_standard FT_ENCODING_ADOBE_STANDARD # define ft_encoding_adobe_expert FT_ENCODING_ADOBE_EXPERT # define ft_encoding_adobe_custom FT_ENCODING_ADOBE_CUSTOM # define ft_encoding_apple_roman FT_ENCODING_APPLE_ROMAN An enumeration to specify character sets supported by charmaps. Used in the FT_Select_Charmap API function.","title":"FT_Encoding"},{"location":"ft2-base_interface.html#ft_enc_tag","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # ifndef FT_ENC_TAG # define FT_ENC_TAG ( value, a, b, c, d ) \\ value = ( ( ( FT_UInt32 )(a) 24 ) | \\ ( ( FT_UInt32 )(b) 16 ) | \\ ( ( FT_UInt32 )(c) 8 ) | \\ ( FT_UInt32 )(d) ) # endif /* FT_ENC_TAG */ This macro converts four-letter tags into an unsigned long. It is used to define encoding identifiers (see FT_Encoding ).","title":"FT_ENC_TAG"},{"location":"ft2-base_interface.html#ft_facerec","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_FaceRec_ { FT_Long num_faces; FT_Long face_index; FT_Long face_flags; FT_Long style_flags; FT_Long num_glyphs; FT_String * family_name; FT_String * style_name; FT_Int num_fixed_sizes; FT_Bitmap_Size * available_sizes; FT_Int num_charmaps; FT_CharMap * charmaps; FT_Generic generic; /*# The following member variables (down to `underline_thickness`) */ /*# are only relevant to scalable outlines; cf. @ FT_Bitmap_Size */ /*# for bitmap fonts. */ FT_BBox bbox; FT_UShort units_per_EM; FT_Short ascender; FT_Short descender; FT_Short height; FT_Short max_advance_width; FT_Short max_advance_height; FT_Short underline_position; FT_Short underline_thickness; FT_GlyphSlot glyph; FT_Size size; FT_CharMap charmap; /*@private begin */ FT_Driver driver; FT_Memory memory; FT_Stream stream; FT_ListRec sizes_list; FT_Generic autohint; /* face-specific auto-hinter data */ void * extensions; /* unused */ FT_Face_Internal internal; /*@private end */ } FT_FaceRec ; FreeType root face class structure. A face object models a typeface in a font file.","title":"FT_FaceRec"},{"location":"ft2-base_interface.html#ft_has_horizontal","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_HORIZONTAL ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_HORIZONTAL ) A macro that returns true whenever a face object contains horizontal metrics (this is true for all font formats though).","title":"FT_HAS_HORIZONTAL"},{"location":"ft2-base_interface.html#ft_has_vertical","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_VERTICAL ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_VERTICAL ) A macro that returns true whenever a face object contains real vertical metrics (and not only synthesized ones).","title":"FT_HAS_VERTICAL"},{"location":"ft2-base_interface.html#ft_has_kerning","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_KERNING ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_KERNING ) A macro that returns true whenever a face object contains kerning data that can be accessed with FT_Get_Kerning .","title":"FT_HAS_KERNING"},{"location":"ft2-base_interface.html#ft_has_fixed_sizes","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_FIXED_SIZES ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_FIXED_SIZES ) A macro that returns true whenever a face object contains some embedded bitmaps. See the available_sizes field of the FT_FaceRec structure.","title":"FT_HAS_FIXED_SIZES"},{"location":"ft2-base_interface.html#ft_has_glyph_names","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_GLYPH_NAMES ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_GLYPH_NAMES ) A macro that returns true whenever a face object contains some glyph names that can be accessed through FT_Get_Glyph_Name .","title":"FT_HAS_GLYPH_NAMES"},{"location":"ft2-base_interface.html#ft_has_color","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_COLOR ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_COLOR ) A macro that returns true whenever a face object contains tables for color glyphs.","title":"FT_HAS_COLOR"},{"location":"ft2-base_interface.html#ft_has_multiple_masters","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_MULTIPLE_MASTERS ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_MULTIPLE_MASTERS ) A macro that returns true whenever a face object contains some multiple masters. The functions provided by FT_MULTIPLE_MASTERS_H are then available to choose the exact design you want.","title":"FT_HAS_MULTIPLE_MASTERS"},{"location":"ft2-base_interface.html#ft_is_sfnt","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_SFNT ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_SFNT ) A macro that returns true whenever a face object contains a font whose format is based on the SFNT storage scheme. This usually means: TrueType fonts, OpenType fonts, as well as SFNT-based embedded bitmap fonts. If this macro is true, all functions defined in FT_SFNT_NAMES_H and FT_TRUETYPE_TABLES_H are available.","title":"FT_IS_SFNT"},{"location":"ft2-base_interface.html#ft_is_scalable","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_SCALABLE ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_SCALABLE ) A macro that returns true whenever a face object contains a scalable font face (true for TrueType, Type 1, Type 42, CID, OpenType/CFF, and PFR font formats).","title":"FT_IS_SCALABLE"},{"location":"ft2-base_interface.html#ft_is_fixed_width","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_FIXED_WIDTH ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_FIXED_WIDTH ) A macro that returns true whenever a face object contains a font face that contains fixed-width (or monospace , fixed-pitch , etc.) glyphs.","title":"FT_IS_FIXED_WIDTH"},{"location":"ft2-base_interface.html#ft_is_cid_keyed","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_CID_KEYED ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_CID_KEYED ) A macro that returns true whenever a face object contains a CID-keyed font. See the discussion of FT_FACE_FLAG_CID_KEYED for more details. If this macro is true, all functions defined in FT_CID_H are available.","title":"FT_IS_CID_KEYED"},{"location":"ft2-base_interface.html#ft_is_tricky","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_TRICKY ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_TRICKY ) A macro that returns true whenever a face represents a tricky font. See the discussion of FT_FACE_FLAG_TRICKY for more details.","title":"FT_IS_TRICKY"},{"location":"ft2-base_interface.html#ft_is_named_instance","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_NAMED_INSTANCE ( face ) \\ ( (face)- face_index 0x7FFF0000L ) A macro that returns true whenever a face object is a named instance of a GX or OpenType variation font. [Since 2.9] Changing the design coordinates with FT_Set_Var_Design_Coordinates or FT_Set_Var_Blend_Coordinates does not influence the return value of this macro (only FT_Set_Named_Instance does that).","title":"FT_IS_NAMED_INSTANCE"},{"location":"ft2-base_interface.html#ft_is_variation","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_IS_VARIATION ( face ) \\ ( (face)- face_flags FT_FACE_FLAG_VARIATION ) A macro that returns true whenever a face object has been altered by FT_Set_MM_Design_Coordinates , FT_Set_Var_Design_Coordinates , or FT_Set_Var_Blend_Coordinates .","title":"FT_IS_VARIATION"},{"location":"ft2-base_interface.html#ft_sizerec","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_SizeRec_ { FT_Face face; /* parent face object */ FT_Generic generic; /* generic pointer for client uses */ FT_Size_Metrics metrics; /* size metrics */ FT_Size_Internal internal; } FT_SizeRec ; FreeType root size class structure. A size object models a face object at a given size.","title":"FT_SizeRec"},{"location":"ft2-base_interface.html#ft_size_metrics","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_Metrics_ { FT_UShort x_ppem; /* horizontal pixels per EM */ FT_UShort y_ppem; /* vertical pixels per EM */ FT_Fixed x_scale; /* scaling values used to convert font */ FT_Fixed y_scale; /* units to 26.6 fractional pixels */ FT_Pos ascender; /* ascender in 26.6 frac. pixels */ FT_Pos descender; /* descender in 26.6 frac. pixels */ FT_Pos height; /* text height in 26.6 frac. pixels */ FT_Pos max_advance; /* max horizontal advance, in 26.6 pixels */ } FT_Size_Metrics ; The size metrics structure gives the metrics of a size object.","title":"FT_Size_Metrics"},{"location":"ft2-base_interface.html#ft_glyphslotrec","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_GlyphSlotRec_ { FT_Library library; FT_Face face; FT_GlyphSlot next; FT_UInt glyph_index; /* new in 2.10; was reserved previously */ FT_Generic generic; FT_Glyph_Metrics metrics; FT_Fixed linearHoriAdvance; FT_Fixed linearVertAdvance; FT_Vector advance; FT_Glyph_Format format; FT_Bitmap bitmap; FT_Int bitmap_left; FT_Int bitmap_top; FT_Outline outline; FT_UInt num_subglyphs; FT_SubGlyph subglyphs; void * control_data; long control_len; FT_Pos lsb_delta; FT_Pos rsb_delta; void * other; FT_Slot_Internal internal; } FT_GlyphSlotRec ; FreeType root glyph slot class structure. A glyph slot is a container where individual glyphs can be loaded, be they in outline or bitmap format.","title":"FT_GlyphSlotRec"},{"location":"ft2-base_interface.html#ft_glyph_metrics","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Glyph_Metrics_ { FT_Pos width; FT_Pos height; FT_Pos horiBearingX; FT_Pos horiBearingY; FT_Pos horiAdvance; FT_Pos vertBearingX; FT_Pos vertBearingY; FT_Pos vertAdvance; } FT_Glyph_Metrics ; A structure to model the metrics of a single glyph. The values are expressed in 26.6 fractional pixel format; if the flag FT_LOAD_NO_SCALE has been used while loading the glyph, values are expressed in font units instead.","title":"FT_Glyph_Metrics"},{"location":"ft2-base_interface.html#ft_subglyph","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_SubGlyphRec_* FT_SubGlyph ; The subglyph structure is an internal object used to describe subglyphs (for example, in the case of composites).","title":"FT_SubGlyph"},{"location":"ft2-base_interface.html#ft_bitmap_size","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Bitmap_Size_ { FT_Short height; FT_Short width; FT_Pos size; FT_Pos x_ppem; FT_Pos y_ppem; } FT_Bitmap_Size ; This structure models the metrics of a bitmap strike (i.e., a set of glyphs for a given point size and resolution) in a bitmap font. It is used for the available_sizes field of FT_Face .","title":"FT_Bitmap_Size"},{"location":"ft2-base_interface.html#ft_init_freetype","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Init_FreeType ( FT_Library *alibrary ); Initialize a new FreeType library object. The set of modules that are registered by this function is determined at build time.","title":"FT_Init_FreeType"},{"location":"ft2-base_interface.html#ft_done_freetype","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Done_FreeType ( FT_Library library ); Destroy a given FreeType library object and all of its children, including resources, drivers, faces, sizes, etc.","title":"FT_Done_FreeType"},{"location":"ft2-base_interface.html#ft_new_face","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_New_Face ( FT_Library library, const char * filepathname, FT_Long face_index, FT_Face *aface ); Call FT_Open_Face to open a font by its pathname.","title":"FT_New_Face"},{"location":"ft2-base_interface.html#ft_done_face","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Done_Face ( FT_Face face ); Discard a given face object, as well as all of its child slots and sizes.","title":"FT_Done_Face"},{"location":"ft2-base_interface.html#ft_reference_face","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Reference_Face ( FT_Face face ); A counter gets initialized to 1 at the time an FT_Face structure is created. This function increments the counter. FT_Done_Face then only destroys a face if the counter is 1, otherwise it simply decrements the counter. This function helps in managing life-cycles of structures that reference FT_Face objects.","title":"FT_Reference_Face"},{"location":"ft2-base_interface.html#ft_new_memory_face","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_New_Memory_Face ( FT_Library library, const FT_Byte * file_base, FT_Long file_size, FT_Long face_index, FT_Face *aface ); Call FT_Open_Face to open a font that has been loaded into memory.","title":"FT_New_Memory_Face"},{"location":"ft2-base_interface.html#ft_face_properties","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Face_Properties ( FT_Face face, FT_UInt num_properties, FT_Parameter * properties ); Set or override certain (library or module-wide) properties on a face-by-face basis. Useful for finer-grained control and avoiding locks on shared structures (threads can modify their own faces as they see fit). Contrary to FT_Property_Set , this function uses FT_Parameter so that you can pass multiple properties to the target face in one call. Note that only a subset of the available properties can be controlled. FT_PARAM_TAG_STEM_DARKENING (stem darkening, corresponding to the property no-stem-darkening provided by the autofit , cff , type1 , and t1cid modules; see no-stem-darkening ). FT_PARAM_TAG_LCD_FILTER_WEIGHTS (LCD filter weights, corresponding to function FT_Library_SetLcdFilterWeights ). FT_PARAM_TAG_RANDOM_SEED (seed value for the CFF, Type 1, and CID random operator, corresponding to the random-seed property provided by the cff , type1 , and t1cid modules; see random-seed ). Pass NULL as data in FT_Parameter for a given tag to reset the option and use the library or module default again.","title":"FT_Face_Properties"},{"location":"ft2-base_interface.html#ft_open_face","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Open_Face ( FT_Library library, const FT_Open_Args * args, FT_Long face_index, FT_Face *aface ); Create a face object from a given resource described by FT_Open_Args .","title":"FT_Open_Face"},{"location":"ft2-base_interface.html#ft_open_args","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Open_Args_ { FT_UInt flags; const FT_Byte * memory_base; FT_Long memory_size; FT_String * pathname; FT_Stream stream; FT_Module driver; FT_Int num_params; FT_Parameter * params; } FT_Open_Args ; A structure to indicate how to open a new font file or stream. A pointer to such a structure can be used as a parameter for the functions FT_Open_Face and FT_Attach_Stream .","title":"FT_Open_Args"},{"location":"ft2-base_interface.html#ft_parameter","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Parameter_ { FT_ULong tag; FT_Pointer data; } FT_Parameter ; A simple structure to pass more or less generic parameters to FT_Open_Face and FT_Face_Properties .","title":"FT_Parameter"},{"location":"ft2-base_interface.html#ft_attach_file","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Attach_File ( FT_Face face, const char * filepathname ); Call FT_Attach_Stream to attach a file.","title":"FT_Attach_File"},{"location":"ft2-base_interface.html#ft_attach_stream","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Attach_Stream ( FT_Face face, FT_Open_Args * parameters ); Attach data to a face object. Normally, this is used to read additional information for the face object. For example, you can attach an AFM file that comes with a Type 1 font to get the kerning values and other metrics.","title":"FT_Attach_Stream"},{"location":"ft2-base_interface.html#ft_set_char_size","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Set_Char_Size ( FT_Face face, FT_F26Dot6 char_width, FT_F26Dot6 char_height, FT_UInt horz_resolution, FT_UInt vert_resolution ); Call FT_Request_Size to request the nominal size (in points).","title":"FT_Set_Char_Size"},{"location":"ft2-base_interface.html#ft_set_pixel_sizes","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Set_Pixel_Sizes ( FT_Face face, FT_UInt pixel_width, FT_UInt pixel_height ); Call FT_Request_Size to request the nominal size (in pixels).","title":"FT_Set_Pixel_Sizes"},{"location":"ft2-base_interface.html#ft_request_size","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Request_Size ( FT_Face face, FT_Size_Request req ); Resize the scale of the active FT_Size object in a face.","title":"FT_Request_Size"},{"location":"ft2-base_interface.html#ft_select_size","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Select_Size ( FT_Face face, FT_Int strike_index ); Select a bitmap strike. To be more precise, this function sets the scaling factors of the active FT_Size object in a face so that bitmaps from this particular strike are taken by FT_Load_Glyph and friends.","title":"FT_Select_Size"},{"location":"ft2-base_interface.html#ft_size_request_type","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Size_Request_Type_ { FT_SIZE_REQUEST_TYPE_NOMINAL , FT_SIZE_REQUEST_TYPE_REAL_DIM , FT_SIZE_REQUEST_TYPE_BBOX , FT_SIZE_REQUEST_TYPE_CELL , FT_SIZE_REQUEST_TYPE_SCALES , FT_SIZE_REQUEST_TYPE_MAX } FT_Size_Request_Type ; An enumeration type that lists the supported size request types, i.e., what input size (in font units) maps to the requested output size (in pixels, as computed from the arguments of FT_Size_Request ).","title":"FT_Size_Request_Type"},{"location":"ft2-base_interface.html#ft_size_requestrec","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_RequestRec_ { FT_Size_Request_Type type; FT_Long width; FT_Long height; FT_UInt horiResolution; FT_UInt vertResolution; } FT_Size_RequestRec ; A structure to model a size request.","title":"FT_Size_RequestRec"},{"location":"ft2-base_interface.html#ft_size_request","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_RequestRec_ * FT_Size_Request ; A handle to a size request structure.","title":"FT_Size_Request"},{"location":"ft2-base_interface.html#ft_set_transform","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( void ) FT_Set_Transform ( FT_Face face, FT_Matrix * matrix, FT_Vector * delta ); Set the transformation that is applied to glyph images when they are loaded into a glyph slot through FT_Load_Glyph .","title":"FT_Set_Transform"},{"location":"ft2-base_interface.html#ft_load_glyph","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Load_Glyph ( FT_Face face, FT_UInt glyph_index, FT_Int32 load_flags ); Load a glyph into the glyph slot of a face object.","title":"FT_Load_Glyph"},{"location":"ft2-base_interface.html#ft_get_char_index","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt ) FT_Get_Char_Index ( FT_Face face, FT_ULong charcode ); Return the glyph index of a given character code. This function uses the currently selected charmap to do the mapping.","title":"FT_Get_Char_Index"},{"location":"ft2-base_interface.html#ft_get_first_char","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_ULong ) FT_Get_First_Char ( FT_Face face, FT_UInt *agindex ); Return the first character code in the current charmap of a given face, together with its corresponding glyph index.","title":"FT_Get_First_Char"},{"location":"ft2-base_interface.html#ft_get_next_char","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_ULong ) FT_Get_Next_Char ( FT_Face face, FT_ULong char_code, FT_UInt *agindex ); Return the next character code in the current charmap of a given face following the value char_code , as well as the corresponding glyph index.","title":"FT_Get_Next_Char"},{"location":"ft2-base_interface.html#ft_get_name_index","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt ) FT_Get_Name_Index ( FT_Face face, FT_String * glyph_name ); Return the glyph index of a given glyph name.","title":"FT_Get_Name_Index"},{"location":"ft2-base_interface.html#ft_load_char","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Load_Char ( FT_Face face, FT_ULong char_code, FT_Int32 load_flags ); Load a glyph into the glyph slot of a face object, accessed by its character code.","title":"FT_Load_Char"},{"location":"ft2-base_interface.html#ft_load_target_mode","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_LOAD_TARGET_MODE ( x ) ( ( FT_Render_Mode )( ( (x) 16 ) 15 ) ) Return the FT_Render_Mode corresponding to a given FT_LOAD_TARGET_XXX value.","title":"FT_LOAD_TARGET_MODE"},{"location":"ft2-base_interface.html#ft_render_glyph","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Render_Glyph ( FT_GlyphSlot slot, FT_Render_Mode render_mode ); Convert a given glyph image to a bitmap. It does so by inspecting the glyph image format, finding the relevant renderer, and invoking it.","title":"FT_Render_Glyph"},{"location":"ft2-base_interface.html#ft_render_mode","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Render_Mode_ { FT_RENDER_MODE_NORMAL = 0, FT_RENDER_MODE_LIGHT , FT_RENDER_MODE_MONO , FT_RENDER_MODE_LCD , FT_RENDER_MODE_LCD_V , FT_RENDER_MODE_MAX } FT_Render_Mode ; /* these constants are deprecated; use the corresponding */ /* ` FT_Render_Mode ` values instead */ # define ft_render_mode_normal FT_RENDER_MODE_NORMAL # define ft_render_mode_mono FT_RENDER_MODE_MONO Render modes supported by FreeType 2. Each mode corresponds to a specific type of scanline conversion performed on the outline. For bitmap fonts and embedded bitmaps the bitmap- pixel_mode field in the FT_GlyphSlotRec structure gives the format of the returned bitmap. All modes except FT_RENDER_MODE_MONO use 256 levels of opacity, indicating pixel coverage. Use linear alpha blending and gamma correction to correctly render non-monochrome glyph bitmaps onto a surface; see FT_Render_Glyph .","title":"FT_Render_Mode"},{"location":"ft2-base_interface.html#ft_get_kerning","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_Kerning ( FT_Face face, FT_UInt left_glyph, FT_UInt right_glyph, FT_UInt kern_mode, FT_Vector *akerning ); Return the kerning vector between two glyphs of the same face.","title":"FT_Get_Kerning"},{"location":"ft2-base_interface.html#ft_kerning_mode","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef enum FT_Kerning_Mode_ { FT_KERNING_DEFAULT = 0, FT_KERNING_UNFITTED , FT_KERNING_UNSCALED } FT_Kerning_Mode ; /* these constants are deprecated; use the corresponding */ /* ` FT_Kerning_Mode ` values instead */ # define ft_kerning_default FT_KERNING_DEFAULT # define ft_kerning_unfitted FT_KERNING_UNFITTED # define ft_kerning_unscaled FT_KERNING_UNSCALED An enumeration to specify the format of kerning values returned by FT_Get_Kerning .","title":"FT_Kerning_Mode"},{"location":"ft2-base_interface.html#ft_get_track_kerning","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_Track_Kerning ( FT_Face face, FT_Fixed point_size, FT_Int degree, FT_Fixed * akerning ); Return the track kerning for a given face object at a given size.","title":"FT_Get_Track_Kerning"},{"location":"ft2-base_interface.html#ft_get_glyph_name","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_Glyph_Name ( FT_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ); Retrieve the ASCII name of a given glyph in a face. This only works for those faces where FT_HAS_GLYPH_NAMES (face) returns 1.","title":"FT_Get_Glyph_Name"},{"location":"ft2-base_interface.html#ft_get_postscript_name","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( const char * ) FT_Get_Postscript_Name ( FT_Face face ); Retrieve the ASCII PostScript name of a given face, if available. This only works with PostScript, TrueType, and OpenType fonts.","title":"FT_Get_Postscript_Name"},{"location":"ft2-base_interface.html#ft_charmaprec","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_CharMapRec_ { FT_Face face; FT_Encoding encoding; FT_UShort platform_id; FT_UShort encoding_id; } FT_CharMapRec ; The base charmap structure.","title":"FT_CharMapRec"},{"location":"ft2-base_interface.html#ft_select_charmap","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Select_Charmap ( FT_Face face, FT_Encoding encoding ); Select a given charmap by its encoding tag (as listed in freetype.h ).","title":"FT_Select_Charmap"},{"location":"ft2-base_interface.html#ft_set_charmap","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Set_Charmap ( FT_Face face, FT_CharMap charmap ); Select a given charmap for character code to glyph index mapping.","title":"FT_Set_Charmap"},{"location":"ft2-base_interface.html#ft_get_charmap_index","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Int ) FT_Get_Charmap_Index ( FT_CharMap charmap ); Retrieve index of a given charmap.","title":"FT_Get_Charmap_Index"},{"location":"ft2-base_interface.html#ft_get_fstype_flags","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UShort ) FT_Get_FSType_Flags ( FT_Face face ); Return the fsType flags for a font.","title":"FT_Get_FSType_Flags"},{"location":"ft2-base_interface.html#ft_get_subglyph_info","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Error ) FT_Get_SubGlyph_Info ( FT_GlyphSlot glyph, FT_UInt sub_index, FT_Int *p_index, FT_UInt *p_flags, FT_Int *p_arg1, FT_Int *p_arg2, FT_Matrix *p_transform ); Retrieve a description of a given subglyph. Only use it if glyph- format is FT_GLYPH_FORMAT_COMPOSITE ; an error is returned otherwise.","title":"FT_Get_SubGlyph_Info"},{"location":"ft2-base_interface.html#ft_face_internal","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Face_InternalRec_* FT_Face_Internal ; An opaque handle to an FT_Face_InternalRec structure that models the private data of a given FT_Face object. This structure might change between releases of FreeType 2 and is not generally available to client applications.","title":"FT_Face_Internal"},{"location":"ft2-base_interface.html#ft_size_internal","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Size_InternalRec_* FT_Size_Internal ; An opaque handle to an FT_Size_InternalRec structure, used to model private data of a given FT_Size object.","title":"FT_Size_Internal"},{"location":"ft2-base_interface.html#ft_slot_internal","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_Slot_InternalRec_* FT_Slot_Internal ; An opaque handle to an FT_Slot_InternalRec structure, used to model private data of a given FT_GlyphSlot object.","title":"FT_Slot_Internal"},{"location":"ft2-base_interface.html#ft_face_flag_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_FACE_FLAG_SCALABLE ( 1L 0 ) # define FT_FACE_FLAG_FIXED_SIZES ( 1L 1 ) # define FT_FACE_FLAG_FIXED_WIDTH ( 1L 2 ) # define FT_FACE_FLAG_SFNT ( 1L 3 ) # define FT_FACE_FLAG_HORIZONTAL ( 1L 4 ) # define FT_FACE_FLAG_VERTICAL ( 1L 5 ) # define FT_FACE_FLAG_KERNING ( 1L 6 ) # define FT_FACE_FLAG_FAST_GLYPHS ( 1L 7 ) # define FT_FACE_FLAG_MULTIPLE_MASTERS ( 1L 8 ) # define FT_FACE_FLAG_GLYPH_NAMES ( 1L 9 ) # define FT_FACE_FLAG_EXTERNAL_STREAM ( 1L 10 ) # define FT_FACE_FLAG_HINTER ( 1L 11 ) # define FT_FACE_FLAG_CID_KEYED ( 1L 12 ) # define FT_FACE_FLAG_TRICKY ( 1L 13 ) # define FT_FACE_FLAG_COLOR ( 1L 14 ) # define FT_FACE_FLAG_VARIATION ( 1L 15 ) A list of bit flags used in the face_flags field of the FT_FaceRec structure. They inform client applications of properties of the corresponding face.","title":"FT_FACE_FLAG_XXX"},{"location":"ft2-base_interface.html#ft_style_flag_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_STYLE_FLAG_ITALIC ( 1 0 ) # define FT_STYLE_FLAG_BOLD ( 1 1 ) A list of bit flags to indicate the style of a given face. These are used in the style_flags field of FT_FaceRec .","title":"FT_STYLE_FLAG_XXX"},{"location":"ft2-base_interface.html#ft_open_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_OPEN_MEMORY 0x1 # define FT_OPEN_STREAM 0x2 # define FT_OPEN_PATHNAME 0x4 # define FT_OPEN_DRIVER 0x8 # define FT_OPEN_PARAMS 0x10 /* these constants are deprecated; use the corresponding ` FT_OPEN_XXX ` */ /* values instead */ # define ft_open_memory FT_OPEN_MEMORY # define ft_open_stream FT_OPEN_STREAM # define ft_open_pathname FT_OPEN_PATHNAME # define ft_open_driver FT_OPEN_DRIVER # define ft_open_params FT_OPEN_PARAMS A list of bit field constants used within the flags field of the FT_Open_Args structure.","title":"FT_OPEN_XXX"},{"location":"ft2-base_interface.html#ft_load_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_LOAD_DEFAULT 0x0 # define FT_LOAD_NO_SCALE ( 1L 0 ) # define FT_LOAD_NO_HINTING ( 1L 1 ) # define FT_LOAD_RENDER ( 1L 2 ) # define FT_LOAD_NO_BITMAP ( 1L 3 ) # define FT_LOAD_VERTICAL_LAYOUT ( 1L 4 ) # define FT_LOAD_FORCE_AUTOHINT ( 1L 5 ) # define FT_LOAD_CROP_BITMAP ( 1L 6 ) # define FT_LOAD_PEDANTIC ( 1L 7 ) # define FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ( 1L 9 ) # define FT_LOAD_NO_RECURSE ( 1L 10 ) # define FT_LOAD_IGNORE_TRANSFORM ( 1L 11 ) # define FT_LOAD_MONOCHROME ( 1L 12 ) # define FT_LOAD_LINEAR_DESIGN ( 1L 13 ) # define FT_LOAD_NO_AUTOHINT ( 1L 15 ) /* Bits 16-19 are used by `FT_LOAD_TARGET_` */ # define FT_LOAD_COLOR ( 1L 20 ) # define FT_LOAD_COMPUTE_METRICS ( 1L 21 ) # define FT_LOAD_BITMAP_METRICS_ONLY ( 1L 22 ) A list of bit field constants for FT_Load_Glyph to indicate what kind of operations to perform during glyph loading.","title":"FT_LOAD_XXX"},{"location":"ft2-base_interface.html#ft_load_target_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_LOAD_TARGET_( x ) ( ( FT_Int32 )( (x) 15 ) 16 ) # define FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_( FT_RENDER_MODE_NORMAL ) # define FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_( FT_RENDER_MODE_LIGHT ) # define FT_LOAD_TARGET_MONO FT_LOAD_TARGET_( FT_RENDER_MODE_MONO ) # define FT_LOAD_TARGET_LCD FT_LOAD_TARGET_( FT_RENDER_MODE_LCD ) # define FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_( FT_RENDER_MODE_LCD_V ) A list of values to select a specific hinting algorithm for the hinter. You should OR one of these values to your load_flags when calling FT_Load_Glyph . Note that a font's native hinters may ignore the hinting algorithm you have specified (e.g., the TrueType bytecode interpreter). You can set FT_LOAD_FORCE_AUTOHINT to ensure that the auto-hinter is used.","title":"FT_LOAD_TARGET_XXX"},{"location":"ft2-base_interface.html#ft_subglyph_flag_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS 1 # define FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 2 # define FT_SUBGLYPH_FLAG_ROUND_XY_TO_GRID 4 # define FT_SUBGLYPH_FLAG_SCALE 8 # define FT_SUBGLYPH_FLAG_XY_SCALE 0x40 # define FT_SUBGLYPH_FLAG_2X2 0x80 # define FT_SUBGLYPH_FLAG_USE_MY_METRICS 0x200 A list of constants describing subglyphs. Please refer to the glyf table description in the OpenType specification for the meaning of the various flags (which get synthesized for non-OpenType subglyphs). https://docs.microsoft.com/en-us/typography/opentype/spec/glyf#composite-glyph-description","title":"FT_SUBGLYPH_FLAG_XXX"},{"location":"ft2-base_interface.html#ft_fstype_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_FSTYPE_INSTALLABLE_EMBEDDING 0x0000 # define FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING 0x0002 # define FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING 0x0004 # define FT_FSTYPE_EDITABLE_EMBEDDING 0x0008 # define FT_FSTYPE_NO_SUBSETTING 0x0100 # define FT_FSTYPE_BITMAP_EMBEDDING_ONLY 0x0200 A list of bit flags used in the fsType field of the OS/2 table in a TrueType or OpenType font and the FSType entry in a PostScript font. These bit flags are returned by FT_Get_FSType_Flags ; they inform client applications of embedding and subsetting restrictions associated with a font. See https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf for more details.","title":"FT_FSTYPE_XXX"},{"location":"ft2-base_interface.html#ft_has_fast_glyphs","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FT_HAS_FAST_GLYPHS ( face ) 0 Deprecated.","title":"FT_HAS_FAST_GLYPHS"},{"location":"ft2-basic_types.html","text":"FreeType Docs Core API Basic Data Types Basic Data Types Synopsis This section contains the basic data types defined by FreeType 2, ranging from simple scalar types to bitmap descriptors. More font-specific structures are defined in a different section. FT_Byte Defined in FT_TYPES_H (freetype/fttypes.h). typedef unsigned char FT_Byte ; A simple typedef for the unsigned char type. FT_Bytes Defined in FT_TYPES_H (freetype/fttypes.h). typedef const FT_Byte * FT_Bytes ; A typedef for constant memory areas. FT_Char Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed char FT_Char ; A simple typedef for the signed char type. FT_Int Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed int FT_Int ; A typedef for the int type. FT_UInt Defined in FT_TYPES_H (freetype/fttypes.h). typedef unsigned int FT_UInt ; A typedef for the unsigned int type. FT_Int16 Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h). typedef signed short FT_Int16 ; A typedef for a 16bit signed integer type. FT_UInt16 Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h). typedef unsigned short FT_UInt16 ; A typedef for a 16bit unsigned integer type. FT_Int32 Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h). typedef signed XXX FT_Int32 ; A typedef for a 32bit signed integer type. The size depends on the configuration. FT_UInt32 Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h). typedef unsigned XXX FT_UInt32 ; FT_Int64 Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h). typedef signed XXX FT_Int64 ; FT_UInt64 Defined in FT_CONFIG_CONFIG_H (freetype/config/ftconfig.h). typedef unsigned XXX FT_UInt64 ; FT_Short Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed short FT_Short ; A typedef for signed short. FT_UShort Defined in FT_TYPES_H (freetype/fttypes.h). typedef unsigned short FT_UShort ; A typedef for unsigned short. FT_Long Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed long FT_Long ; A typedef for signed long. FT_ULong Defined in FT_TYPES_H (freetype/fttypes.h). typedef unsigned long FT_ULong ; A typedef for unsigned long. FT_Bool Defined in FT_TYPES_H (freetype/fttypes.h). typedef unsigned char FT_Bool ; A typedef of unsigned char, used for simple booleans. As usual, values 1 and 0 represent true and false, respectively. FT_Offset Defined in FT_TYPES_H (freetype/fttypes.h). typedef size_t FT_Offset ; This is equivalent to the ANSI C size_t type, i.e., the largest unsigned integer type used to express a file size or position, or a memory block size. FT_PtrDist Defined in FT_TYPES_H (freetype/fttypes.h). typedef ft_ptrdiff_t FT_PtrDist ; This is equivalent to the ANSI C ptrdiff_t type, i.e., the largest signed integer type used to express the distance between two pointers. FT_String Defined in FT_TYPES_H (freetype/fttypes.h). typedef char FT_String ; A simple typedef for the char type, usually used for strings. FT_Tag Defined in FT_TYPES_H (freetype/fttypes.h). typedef FT_UInt32 FT_Tag ; A typedef for 32-bit tags (as used in the SFNT format). FT_Error Defined in FT_TYPES_H (freetype/fttypes.h). typedef int FT_Error ; The FreeType error code type. A value of 0 is always interpreted as a successful operation. FT_Fixed Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed long FT_Fixed ; This type is used to store 16.16 fixed-point values, like scaling values or matrix coefficients. FT_Pointer Defined in FT_TYPES_H (freetype/fttypes.h). typedef void * FT_Pointer ; A simple typedef for a typeless pointer. FT_Pos Defined in FT_IMAGE_H (freetype/ftimage.h). typedef signed long FT_Pos ; The type FT_Pos is used to store vectorial coordinates. Depending on the context, these can represent distances in integer font units, or 16.16, or 26.6 fixed-point pixel coordinates. FT_Vector Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Vector_ { FT_Pos x; FT_Pos y; } FT_Vector ; A simple structure used to store a 2D vector; coordinates are of the FT_Pos type. fields x The horizontal coordinate. y The vertical coordinate. FT_BBox Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_BBox_ { FT_Pos xMin, yMin; FT_Pos xMax, yMax; } FT_BBox ; A structure used to hold an outline's bounding box, i.e., the coordinates of its extrema in the horizontal and vertical directions. fields xMin The horizontal minimum (left-most). yMin The vertical minimum (bottom-most). xMax The horizontal maximum (right-most). yMax The vertical maximum (top-most). note The bounding box is specified with the coordinates of the lower left and the upper right corner. In PostScript, those values are often called (llx,lly) and (urx,ury), respectively. If yMin is negative, this value gives the glyph's descender. Otherwise, the glyph doesn't descend below the baseline. Similarly, if ymax is positive, this value gives the glyph's ascender. xMin gives the horizontal distance from the glyph's origin to the left edge of the glyph's bounding box. If xMin is negative, the glyph extends to the left of the origin. FT_Matrix Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_Matrix_ { FT_Fixed xx, xy; FT_Fixed yx, yy; } FT_Matrix ; A simple structure used to store a 2x2 matrix. Coefficients are in 16.16 fixed-point format. The computation performed is: x = x*xx + y*xy y = x*yx + y*yy fields xx Matrix coefficient. xy Matrix coefficient. yx Matrix coefficient. yy Matrix coefficient. FT_FWord Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed short FT_FWord ; /* distance in FUnits */ A signed 16-bit integer used to store a distance in original font units. FT_UFWord Defined in FT_TYPES_H (freetype/fttypes.h). typedef unsigned short FT_UFWord ; /* unsigned distance */ An unsigned 16-bit integer used to store a distance in original font units. FT_F2Dot14 Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed short FT_F2Dot14 ; A signed 2.14 fixed-point type used for unit vectors. FT_UnitVector Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_UnitVector_ { FT_F2Dot14 x; FT_F2Dot14 y; } FT_UnitVector ; A simple structure used to store a 2D vector unit vector. Uses FT_F2Dot14 types. fields x Horizontal coordinate. y Vertical coordinate. FT_F26Dot6 Defined in FT_TYPES_H (freetype/fttypes.h). typedef signed long FT_F26Dot6 ; A signed 26.6 fixed-point type used for vectorial pixel coordinates. FT_Data Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_Data_ { const FT_Byte * pointer; FT_Int length; } FT_Data ; Read-only binary data represented as a pointer and a length. fields pointer The data. length The length of the data in bytes. FT_MAKE_TAG Defined in FT_TYPES_H (freetype/fttypes.h). # define FT_MAKE_TAG ( _x1, _x2, _x3, _x4 ) \\ ( FT_Tag ) \\ ( ( ( FT_ULong )_x1 24 ) | \\ ( ( FT_ULong )_x2 16 ) | \\ ( ( FT_ULong )_x3 8 ) | \\ ( FT_ULong )_x4 ) This macro converts four-letter tags that are used to label TrueType tables into an unsigned long, to be used within FreeType. note The produced values must be 32-bit integers. Don't redefine this macro. FT_Generic Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_Generic_ { void * data; FT_Generic_Finalizer finalizer; } FT_Generic ; Client applications often need to associate their own data to a variety of FreeType core objects. For example, a text layout API might want to associate a glyph cache to a given size object. Some FreeType object contains a generic field, of type FT_Generic , which usage is left to client applications and font servers. It can be used to store a pointer to client-specific data, as well as the address of a finalizer function, which will be called by FreeType when the object is destroyed (for example, the previous client example would put the address of the glyph cache destructor in the finalizer field). fields data A typeless pointer to any client-specified data. This field is completely ignored by the FreeType library. finalizer A pointer to a generic finalizer function, which will be called when the object is destroyed. If this field is set to NULL , no code will be called. FT_Generic_Finalizer Defined in FT_TYPES_H (freetype/fttypes.h). typedef void (* FT_Generic_Finalizer )( void * object ); Describe a function used to destroy the client data of any FreeType object. See the description of the FT_Generic type for details of usage. input The address of the FreeType object that is under finalization. Its client data is accessed through its generic field. FT_Bitmap Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Bitmap_ { unsigned int rows; unsigned int width; int pitch; unsigned char * buffer; unsigned short num_grays; unsigned char pixel_mode; unsigned char palette_mode; void * palette; } FT_Bitmap ; A structure used to describe a bitmap or pixmap to the raster. Note that we now manage pixmaps of various depths through the pixel_mode field. fields rows The number of bitmap rows. width The number of pixels in bitmap row. pitch The pitch's absolute value is the number of bytes taken by one bitmap row, including padding. However, the pitch is positive when the bitmap has a down flow, and negative when it has an up flow. In all cases, the pitch is an offset to add to a bitmap pointer in order to go down one row. Note that padding means the alignment of a bitmap to a byte border, and FreeType functions normally align to the smallest possible integer value. For the B/W rasterizer, pitch is always an even number. To change the pitch of a bitmap (say, to make it a multiple of 4), use FT_Bitmap_Convert . Alternatively, you might use callback functions to directly render to the application's surface; see the file example2.cpp in the tutorial for a demonstration. buffer A typeless pointer to the bitmap buffer. This value should be aligned on 32-bit boundaries in most cases. num_grays This field is only used with FT_PIXEL_MODE_GRAY ; it gives the number of gray levels used in the bitmap. pixel_mode The pixel mode, i.e., how pixel bits are stored. See FT_Pixel_Mode for possible values. palette_mode This field is intended for paletted pixel modes; it indicates how the palette is stored. Not used currently. palette A typeless pointer to the bitmap palette; this field is intended for paletted pixel modes. Not used currently. FT_Pixel_Mode Defined in FT_IMAGE_H (freetype/ftimage.h). typedef enum FT_Pixel_Mode_ { FT_PIXEL_MODE_NONE = 0, FT_PIXEL_MODE_MONO , FT_PIXEL_MODE_GRAY , FT_PIXEL_MODE_GRAY2 , FT_PIXEL_MODE_GRAY4 , FT_PIXEL_MODE_LCD , FT_PIXEL_MODE_LCD_V , FT_PIXEL_MODE_BGRA , FT_PIXEL_MODE_MAX /* do not remove */ } FT_Pixel_Mode ; /* these constants are deprecated; use the corresponding ` FT_Pixel_Mode ` */ /* values instead. */ # define ft_pixel_mode_none FT_PIXEL_MODE_NONE # define ft_pixel_mode_mono FT_PIXEL_MODE_MONO # define ft_pixel_mode_grays FT_PIXEL_MODE_GRAY # define ft_pixel_mode_pal2 FT_PIXEL_MODE_GRAY2 # define ft_pixel_mode_pal4 FT_PIXEL_MODE_GRAY4 An enumeration type used to describe the format of pixels in a given bitmap. Note that additional formats may be added in the future. values FT_PIXEL_MODE_NONE Value 0 is reserved. FT_PIXEL_MODE_MONO A monochrome bitmap, using 1 bit per pixel. Note that pixels are stored in most-significant order (MSB), which means that the left-most pixel in a byte has value 128. FT_PIXEL_MODE_GRAY An 8-bit bitmap, generally used to represent anti-aliased glyph images. Each pixel is stored in one byte. Note that the number of gray levels is stored in the num_grays field of the FT_Bitmap structure (it generally is 256). FT_PIXEL_MODE_GRAY2 A 2-bit per pixel bitmap, used to represent embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however. FT_PIXEL_MODE_GRAY4 A 4-bit per pixel bitmap, representing embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however. FT_PIXEL_MODE_LCD An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on LCD displays; the bitmap is three times wider than the original glyph image. See also FT_RENDER_MODE_LCD . FT_PIXEL_MODE_LCD_V An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on rotated LCD displays; the bitmap is three times taller than the original glyph image. See also FT_RENDER_MODE_LCD_V . FT_PIXEL_MODE_BGRA [Since 2.5] An image with four 8-bit channels per pixel, representing a color image (such as emoticons) with alpha channel. For each pixel, the format is BGRA, which means, the blue channel comes first in memory. The color channels are pre-multiplied and in the sRGB colorspace. For example, full red at half-translucent opacity will be represented as 00,00,80,80 , not 00,00,FF,80 . See also FT_LOAD_COLOR . FT_Glyph_Format Defined in FT_IMAGE_H (freetype/ftimage.h). typedef enum FT_Glyph_Format_ { FT_IMAGE_TAG ( FT_GLYPH_FORMAT_NONE , 0, 0, 0, 0 ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_COMPOSITE , 'c', 'o', 'm', 'p' ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_BITMAP , 'b', 'i', 't', 's' ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_OUTLINE , 'o', 'u', 't', 'l' ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_PLOTTER , 'p', 'l', 'o', 't' ) } FT_Glyph_Format ; /* these constants are deprecated; use the corresponding */ /* ` FT_Glyph_Format ` values instead. */ # define ft_glyph_format_none FT_GLYPH_FORMAT_NONE # define ft_glyph_format_composite FT_GLYPH_FORMAT_COMPOSITE # define ft_glyph_format_bitmap FT_GLYPH_FORMAT_BITMAP # define ft_glyph_format_outline FT_GLYPH_FORMAT_OUTLINE # define ft_glyph_format_plotter FT_GLYPH_FORMAT_PLOTTER An enumeration type used to describe the format of a given glyph image. Note that this version of FreeType only supports two image formats, even though future font drivers will be able to register their own format. values FT_GLYPH_FORMAT_NONE The value 0 is reserved. FT_GLYPH_FORMAT_COMPOSITE The glyph image is a composite of several other images. This format is only used with FT_LOAD_NO_RECURSE , and is used to report compound glyphs (like accented characters). FT_GLYPH_FORMAT_BITMAP The glyph image is a bitmap, and can be described as an FT_Bitmap . You generally need to access the bitmap field of the FT_GlyphSlotRec structure to read it. FT_GLYPH_FORMAT_OUTLINE The glyph image is a vectorial outline made of line segments and Bezier arcs; it can be described as an FT_Outline ; you generally want to access the outline field of the FT_GlyphSlotRec structure to read it. FT_GLYPH_FORMAT_PLOTTER The glyph image is a vectorial path with no inside and outside contours. Some Type 1 fonts, like those in the Hershey family, contain glyphs in this format. These are described as FT_Outline , but FreeType isn't currently capable of rendering them correctly. 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Note that additional formats may be added in the future.","title":"FT_Pixel_Mode"},{"location":"ft2-basic_types.html#ft_glyph_format","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef enum FT_Glyph_Format_ { FT_IMAGE_TAG ( FT_GLYPH_FORMAT_NONE , 0, 0, 0, 0 ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_COMPOSITE , 'c', 'o', 'm', 'p' ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_BITMAP , 'b', 'i', 't', 's' ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_OUTLINE , 'o', 'u', 't', 'l' ), FT_IMAGE_TAG ( FT_GLYPH_FORMAT_PLOTTER , 'p', 'l', 'o', 't' ) } FT_Glyph_Format ; /* these constants are deprecated; use the corresponding */ /* ` FT_Glyph_Format ` values instead. */ # define ft_glyph_format_none FT_GLYPH_FORMAT_NONE # define ft_glyph_format_composite FT_GLYPH_FORMAT_COMPOSITE # define ft_glyph_format_bitmap FT_GLYPH_FORMAT_BITMAP # define ft_glyph_format_outline FT_GLYPH_FORMAT_OUTLINE # define ft_glyph_format_plotter FT_GLYPH_FORMAT_PLOTTER An enumeration type used to describe the format of a given glyph image. Note that this version of FreeType only supports two image formats, even though future font drivers will be able to register their own format.","title":"FT_Glyph_Format"},{"location":"ft2-basic_types.html#ft_image_tag","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). # ifndef FT_IMAGE_TAG # define FT_IMAGE_TAG ( value, _x1, _x2, _x3, _x4 ) \\ value = ( ( ( unsigned long )_x1 24 ) | \\ ( ( unsigned long )_x2 16 ) | \\ ( ( unsigned long )_x3 8 ) | \\ ( unsigned long )_x4 ) # endif /* FT_IMAGE_TAG */ This macro converts four-letter tags to an unsigned long type.","title":"FT_IMAGE_TAG"},{"location":"ft2-bdf_fonts.html","text":"FreeType Docs Format-Specific API BDF and PCF Files BDF and PCF Files Synopsis This section contains the declaration of functions specific to BDF and PCF fonts. BDF_PropertyType Defined in FT_BDF_H (freetype/ftbdf.h). typedef enum BDF_PropertyType_ { BDF_PROPERTY_TYPE_NONE = 0, BDF_PROPERTY_TYPE_ATOM = 1, BDF_PROPERTY_TYPE_INTEGER = 2, BDF_PROPERTY_TYPE_CARDINAL = 3 } BDF_PropertyType ; A list of BDF property types. values BDF_PROPERTY_TYPE_NONE Value 0 is used to indicate a missing property. BDF_PROPERTY_TYPE_ATOM Property is a string atom. BDF_PROPERTY_TYPE_INTEGER Property is a 32-bit signed integer. BDF_PROPERTY_TYPE_CARDINAL Property is a 32-bit unsigned integer. BDF_Property Defined in FT_BDF_H (freetype/ftbdf.h). typedef struct BDF_PropertyRec_* BDF_Property ; A handle to a BDF_PropertyRec structure to model a given BDF/PCF property. BDF_PropertyRec Defined in FT_BDF_H (freetype/ftbdf.h). typedef struct BDF_PropertyRec_ { BDF_PropertyType type; union { const char * atom; FT_Int32 integer; FT_UInt32 cardinal; } u; } BDF_PropertyRec ; This structure models a given BDF/PCF property. fields type The property type. u.atom The atom string, if type is BDF_PROPERTY_TYPE_ATOM . May be NULL , indicating an empty string. u.integer A signed integer, if type is BDF_PROPERTY_TYPE_INTEGER . u.cardinal An unsigned integer, if type is BDF_PROPERTY_TYPE_CARDINAL . FT_Get_BDF_Charset_ID Defined in FT_BDF_H (freetype/ftbdf.h). FT_EXPORT( FT_Error ) FT_Get_BDF_Charset_ID ( FT_Face face, const char * *acharset_encoding, const char * *acharset_registry ); Retrieve a BDF font character set identity, according to the BDF specification. input face A handle to the input face. output acharset_encoding Charset encoding, as a C string, owned by the face. acharset_registry Charset registry, as a C string, owned by the face. return FreeType error code. 0 means success. note This function only works with BDF faces, returning an error otherwise. FT_Get_BDF_Property Defined in FT_BDF_H (freetype/ftbdf.h). FT_EXPORT( FT_Error ) FT_Get_BDF_Property ( FT_Face face, const char * prop_name, BDF_PropertyRec *aproperty ); Retrieve a BDF property from a BDF or PCF font file. input face A handle to the input face. name The property name. output aproperty The property. return FreeType error code. 0 means success. note This function works with BDF and PCF fonts. It returns an error otherwise. It also returns an error if the property is not in the font. A property is a either key-value pair within the STARTPROPERTIES ... ENDPROPERTIES block of a BDF font or a key-value pair from the info- props array within a FontRec structure of a PCF font. Integer properties are always stored as signed within PCF fonts; consequently, BDF_PROPERTY_TYPE_CARDINAL is a possible return value for BDF fonts only. In case of error, aproperty- type is always set to BDF_PROPERTY_TYPE_NONE .","title":"BDF and PCF Files"},{"location":"ft2-bdf_fonts.html#bdf-and-pcf-files","text":"","title":"BDF and PCF Files"},{"location":"ft2-bdf_fonts.html#synopsis","text":"This section contains the declaration of functions specific to BDF and PCF fonts.","title":"Synopsis"},{"location":"ft2-bdf_fonts.html#bdf_propertytype","text":"Defined in FT_BDF_H (freetype/ftbdf.h). typedef enum BDF_PropertyType_ { BDF_PROPERTY_TYPE_NONE = 0, BDF_PROPERTY_TYPE_ATOM = 1, BDF_PROPERTY_TYPE_INTEGER = 2, BDF_PROPERTY_TYPE_CARDINAL = 3 } BDF_PropertyType ; A list of BDF property types.","title":"BDF_PropertyType"},{"location":"ft2-bdf_fonts.html#bdf_property","text":"Defined in FT_BDF_H (freetype/ftbdf.h). typedef struct BDF_PropertyRec_* BDF_Property ; A handle to a BDF_PropertyRec structure to model a given BDF/PCF property.","title":"BDF_Property"},{"location":"ft2-bdf_fonts.html#bdf_propertyrec","text":"Defined in FT_BDF_H (freetype/ftbdf.h). typedef struct BDF_PropertyRec_ { BDF_PropertyType type; union { const char * atom; FT_Int32 integer; FT_UInt32 cardinal; } u; } BDF_PropertyRec ; This structure models a given BDF/PCF property.","title":"BDF_PropertyRec"},{"location":"ft2-bdf_fonts.html#ft_get_bdf_charset_id","text":"Defined in FT_BDF_H (freetype/ftbdf.h). FT_EXPORT( FT_Error ) FT_Get_BDF_Charset_ID ( FT_Face face, const char * *acharset_encoding, const char * *acharset_registry ); Retrieve a BDF font character set identity, according to the BDF specification.","title":"FT_Get_BDF_Charset_ID"},{"location":"ft2-bdf_fonts.html#ft_get_bdf_property","text":"Defined in FT_BDF_H (freetype/ftbdf.h). FT_EXPORT( FT_Error ) FT_Get_BDF_Property ( FT_Face face, const char * prop_name, BDF_PropertyRec *aproperty ); Retrieve a BDF property from a BDF or PCF font file.","title":"FT_Get_BDF_Property"},{"location":"ft2-bitmap_handling.html","text":"FreeType Docs Support API Bitmap Handling Bitmap Handling Synopsis This section contains functions for handling FT_Bitmap objects, automatically adjusting the target's bitmap buffer size as needed. Note that none of the functions changes the bitmap's flow (as indicated by the sign of the pitch field in FT_Bitmap ). To set the flow, assign an appropriate positive or negative value to the pitch field of the target FT_Bitmap object after calling FT_Bitmap_Init but before calling any of the other functions described here. FT_Bitmap_Init Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( void ) FT_Bitmap_Init ( FT_Bitmap *abitmap ); /* deprecated */ FT_EXPORT( void ) FT_Bitmap_New( FT_Bitmap *abitmap ); Initialize a pointer to an FT_Bitmap structure. inout abitmap A pointer to the bitmap structure. note A deprecated name for the same function is FT_Bitmap_New . FT_Bitmap_Copy Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Copy ( FT_Library library, const FT_Bitmap *source, FT_Bitmap *target ); Copy a bitmap into another one. input library A handle to a library object. source A handle to the source bitmap. output target A handle to the target bitmap. return FreeType error code. 0 means success. note source- buffer and target- buffer must neither be equal nor overlap. FT_Bitmap_Embolden Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Embolden ( FT_Library library, FT_Bitmap * bitmap, FT_Pos xStrength, FT_Pos yStrength ); Embolden a bitmap. The new bitmap will be about xStrength pixels wider and yStrength pixels higher. The left and bottom borders are kept unchanged. input library A handle to a library object. xStrength How strong the glyph is emboldened horizontally. Expressed in 26.6 pixel format. yStrength How strong the glyph is emboldened vertically. Expressed in 26.6 pixel format. inout bitmap A handle to the target bitmap. return FreeType error code. 0 means success. note The current implementation restricts xStrength to be less than or equal to 8 if bitmap is of pixel_mode FT_PIXEL_MODE_MONO . If you want to embolden the bitmap owned by a FT_GlyphSlotRec , you should call FT_GlyphSlot_Own_Bitmap on the slot first. Bitmaps in FT_PIXEL_MODE_GRAY2 and FT_PIXEL_MODE_GRAY @ format are converted to FT_PIXEL_MODE_GRAY format (i.e., 8bpp). FT_Bitmap_Convert Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Convert ( FT_Library library, const FT_Bitmap *source, FT_Bitmap *target, FT_Int alignment ); Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, 8bpp or 32bpp to a bitmap object with depth 8bpp, making the number of used bytes per line (a.k.a. the pitch ) a multiple of alignment . input library A handle to a library object. source The source bitmap. alignment The pitch of the bitmap is a multiple of this argument. Common values are 1, 2, or 4. output target The target bitmap. return FreeType error code. 0 means success. note It is possible to call FT_Bitmap_Convert multiple times without calling FT_Bitmap_Done (the memory is simply reallocated). Use FT_Bitmap_Done to finally remove the bitmap object. The library argument is taken to have access to FreeType's memory handling functions. source- buffer and target- buffer must neither be equal nor overlap. FT_Bitmap_Blend Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Blend ( FT_Library library, const FT_Bitmap * source, const FT_Vector source_offset, FT_Bitmap * target, FT_Vector *atarget_offset, FT_Color color ); Blend a bitmap onto another bitmap, using a given color. input library A handle to a library object. source The source bitmap, which can have any FT_Pixel_Mode format. source_offset The offset vector to the upper left corner of the source bitmap in 26.6 pixel format. It should represent an integer offset; the function will set the lowest six bits to zero to enforce that. color The color used to draw source onto target . inout target A handle to an FT_Bitmap object. It should be either initialized as empty with a call to FT_Bitmap_Init , or it should be of type FT_PIXEL_MODE_BGRA . atarget_offset The offset vector to the upper left corner of the target bitmap in 26.6 pixel format. It should represent an integer offset; the function will set the lowest six bits to zero to enforce that. return FreeType error code. 0 means success. note This function doesn't perform clipping. The bitmap in target gets allocated or reallocated as needed; the vector atarget_offset is updated accordingly. In case of allocation or reallocation, the bitmap's pitch is set to 4 * width . Both source and target must have the same bitmap flow (as indicated by the sign of the pitch field). source- buffer and target- buffer must neither be equal nor overlap. since 2.10 FT_GlyphSlot_Own_Bitmap Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_GlyphSlot_Own_Bitmap ( FT_GlyphSlot slot ); Make sure that a glyph slot owns slot- bitmap . input slot The glyph slot. return FreeType error code. 0 means success. note This function is to be used in combination with FT_Bitmap_Embolden . FT_Bitmap_Done Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Done ( FT_Library library, FT_Bitmap *bitmap ); Destroy a bitmap object initialized with FT_Bitmap_Init . input library A handle to a library object. bitmap The bitmap object to be freed. return FreeType error code. 0 means success. note The library argument is taken to have access to FreeType's memory handling functions.","title":"Bitmap Handling"},{"location":"ft2-bitmap_handling.html#bitmap-handling","text":"","title":"Bitmap Handling"},{"location":"ft2-bitmap_handling.html#synopsis","text":"This section contains functions for handling FT_Bitmap objects, automatically adjusting the target's bitmap buffer size as needed. Note that none of the functions changes the bitmap's flow (as indicated by the sign of the pitch field in FT_Bitmap ). To set the flow, assign an appropriate positive or negative value to the pitch field of the target FT_Bitmap object after calling FT_Bitmap_Init but before calling any of the other functions described here.","title":"Synopsis"},{"location":"ft2-bitmap_handling.html#ft_bitmap_init","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( void ) FT_Bitmap_Init ( FT_Bitmap *abitmap ); /* deprecated */ FT_EXPORT( void ) FT_Bitmap_New( FT_Bitmap *abitmap ); Initialize a pointer to an FT_Bitmap structure.","title":"FT_Bitmap_Init"},{"location":"ft2-bitmap_handling.html#ft_bitmap_copy","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Copy ( FT_Library library, const FT_Bitmap *source, FT_Bitmap *target ); Copy a bitmap into another one.","title":"FT_Bitmap_Copy"},{"location":"ft2-bitmap_handling.html#ft_bitmap_embolden","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Embolden ( FT_Library library, FT_Bitmap * bitmap, FT_Pos xStrength, FT_Pos yStrength ); Embolden a bitmap. The new bitmap will be about xStrength pixels wider and yStrength pixels higher. The left and bottom borders are kept unchanged.","title":"FT_Bitmap_Embolden"},{"location":"ft2-bitmap_handling.html#ft_bitmap_convert","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Convert ( FT_Library library, const FT_Bitmap *source, FT_Bitmap *target, FT_Int alignment ); Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, 8bpp or 32bpp to a bitmap object with depth 8bpp, making the number of used bytes per line (a.k.a. the pitch ) a multiple of alignment .","title":"FT_Bitmap_Convert"},{"location":"ft2-bitmap_handling.html#ft_bitmap_blend","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Blend ( FT_Library library, const FT_Bitmap * source, const FT_Vector source_offset, FT_Bitmap * target, FT_Vector *atarget_offset, FT_Color color ); Blend a bitmap onto another bitmap, using a given color.","title":"FT_Bitmap_Blend"},{"location":"ft2-bitmap_handling.html#ft_glyphslot_own_bitmap","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_GlyphSlot_Own_Bitmap ( FT_GlyphSlot slot ); Make sure that a glyph slot owns slot- bitmap .","title":"FT_GlyphSlot_Own_Bitmap"},{"location":"ft2-bitmap_handling.html#ft_bitmap_done","text":"Defined in FT_BITMAP_H (freetype/ftbitmap.h). FT_EXPORT( FT_Error ) FT_Bitmap_Done ( FT_Library library, FT_Bitmap *bitmap ); Destroy a bitmap object initialized with FT_Bitmap_Init .","title":"FT_Bitmap_Done"},{"location":"ft2-bzip2.html","text":"FreeType Docs Support API BZIP2 Streams BZIP2 Streams Synopsis This section contains the declaration of Bzip2-specific functions. FT_Stream_OpenBzip2 Defined in FT_BZIP2_H (freetype/ftbzip2.h). FT_EXPORT( FT_Error ) FT_Stream_OpenBzip2 ( FT_Stream stream, FT_Stream source ); Open a new stream to parse bzip2-compressed font files. This is mainly used to support the compressed *.pcf.bz2 fonts that come with XFree86. input stream The target embedding stream. source The source stream. return FreeType error code. 0 means success. note The source stream must be opened before calling this function. Calling the internal function FT_Stream_Close on the new stream will not call FT_Stream_Close on the source stream. None of the stream objects will be released to the heap. The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream. In certain builds of the library, bzip2 compression recognition is automatically handled when calling FT_New_Face or FT_Open_Face . This means that if no font driver is capable of handling the raw compressed file, the library will try to open a bzip2 compressed stream from it and re-open the face with it. This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with bzip2 support.","title":"BZIP2 Streams"},{"location":"ft2-bzip2.html#bzip2-streams","text":"","title":"BZIP2 Streams"},{"location":"ft2-bzip2.html#synopsis","text":"This section contains the declaration of Bzip2-specific functions.","title":"Synopsis"},{"location":"ft2-bzip2.html#ft_stream_openbzip2","text":"Defined in FT_BZIP2_H (freetype/ftbzip2.h). FT_EXPORT( FT_Error ) FT_Stream_OpenBzip2 ( FT_Stream stream, FT_Stream source ); Open a new stream to parse bzip2-compressed font files. This is mainly used to support the compressed *.pcf.bz2 fonts that come with XFree86.","title":"FT_Stream_OpenBzip2"},{"location":"ft2-cache_subsystem.html","text":"FreeType Docs Cache Sub-System Cache Sub-System Cache Sub-System Synopsis This section describes the FreeType 2 cache sub-system, which is used to limit the number of concurrently opened FT_Face and FT_Size objects, as well as caching information like character maps and glyph images while limiting their maximum memory usage. Note that all types and functions begin with the FTC_ prefix. The cache is highly portable and thus doesn't know anything about the fonts installed on your system, or how to access them. This implies the following scheme: First, available or installed font faces are uniquely identified by FTC_FaceID values, provided to the cache by the client. Note that the cache only stores and compares these values, and doesn't try to interpret them in any way. Second, the cache calls, only when needed, a client-provided function to convert an FTC_FaceID into a new FT_Face object. The latter is then completely managed by the cache, including its termination through FT_Done_Face . To monitor termination of face objects, the finalizer callback in the generic field of the FT_Face object can be used, which might also be used to store the FTC_FaceID of the face. Clients are free to map face IDs to anything else. The most simple usage is to associate them to a (pathname,face_index) pair that is used to call FT_New_Face . However, more complex schemes are also possible. Note that for the cache to work correctly, the face ID values must be persistent , which means that the contents they point to should not change at runtime, or that their value should not become invalid. If this is unavoidable (e.g., when a font is uninstalled at runtime), you should call FTC_Manager_RemoveFaceID as soon as possible, to let the cache get rid of any references to the old FTC_FaceID it may keep internally. Failure to do so will lead to incorrect behaviour or even crashes. To use the cache, start with calling FTC_Manager_New to create a new FTC_Manager object, which models a single cache instance. You can then look up FT_Face and FT_Size objects with FTC_Manager_LookupFace and FTC_Manager_LookupSize , respectively. If you want to use the charmap caching, call FTC_CMapCache_New , then later use FTC_CMapCache_Lookup to perform the equivalent of FT_Get_Char_Index , only much faster. If you want to use the FT_Glyph caching, call FTC_ImageCache , then later use FTC_ImageCache_Lookup to retrieve the corresponding FT_Glyph objects from the cache. If you need lots of small bitmaps, it is much more memory efficient to call FTC_SBitCache_New followed by FTC_SBitCache_Lookup . This returns FTC_SBitRec structures, which are used to store small bitmaps directly. (A small bitmap is one whose metrics and dimensions all fit into 8-bit integers). We hope to also provide a kerning cache in the near future. FTC_Manager Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ManagerRec_* FTC_Manager ; This object corresponds to one instance of the cache-subsystem. It is used to cache one or more FT_Face objects, along with corresponding FT_Size objects. The manager intentionally limits the total number of opened FT_Face and FT_Size objects to control memory usage. See the max_faces and max_sizes parameters of FTC_Manager_New . The manager is also used to cache nodes of various types while limiting their total memory usage. All limitations are enforced by keeping lists of managed objects in most-recently-used order, and flushing old nodes to make room for new ones. FTC_FaceID Defined in FT_CACHE_H (freetype/ftcache.h). typedef FT_Pointer FTC_FaceID ; An opaque pointer type that is used to identity face objects. The contents of such objects is application-dependent. These pointers are typically used to point to a user-defined structure containing a font file path, and face index. note Never use NULL as a valid FTC_FaceID . Face IDs are passed by the client to the cache manager that calls, when needed, the FTC_Face_Requester to translate them into new FT_Face objects. If the content of a given face ID changes at runtime, or if the value becomes invalid (e.g., when uninstalling a font), you should immediately call FTC_Manager_RemoveFaceID before any other cache function. Failure to do so will result in incorrect behaviour or even memory leaks and crashes. FTC_Face_Requester Defined in FT_CACHE_H (freetype/ftcache.h). typedef FT_Error (* FTC_Face_Requester )( FTC_FaceID face_id, FT_Library library, FT_Pointer req_data, FT_Face * aface ); A callback function provided by client applications. It is used by the cache manager to translate a given FTC_FaceID into a new valid FT_Face object, on demand. input face_id The face ID to resolve. library A handle to a FreeType library object. req_data Application-provided request data (see note below). output aface A new FT_Face handle. return FreeType error code. 0 means success. note The third parameter req_data is the same as the one passed by the client when FTC_Manager_New is called. The face requester should not perform funny things on the returned face object, like creating a new FT_Size for it, or setting a transformation through FT_Set_Transform ! FTC_Manager_New Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_Manager_New ( FT_Library library, FT_UInt max_faces, FT_UInt max_sizes, FT_ULong max_bytes, FTC_Face_Requester requester, FT_Pointer req_data, FTC_Manager *amanager ); Create a new cache manager. input library The parent FreeType library handle to use. max_faces Maximum number of opened FT_Face objects managed by this cache instance. Use 0 for defaults. max_sizes Maximum number of opened FT_Size objects managed by this cache instance. Use 0 for defaults. max_bytes Maximum number of bytes to use for cached data nodes. Use 0 for defaults. Note that this value does not account for managed FT_Face and FT_Size objects. requester An application-provided callback used to translate face IDs into real FT_Face objects. req_data A generic pointer that is passed to the requester each time it is called (see FTC_Face_Requester ). output amanager A handle to a new manager object. 0 in case of failure. return FreeType error code. 0 means success. FTC_Manager_Reset Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Manager_Reset ( FTC_Manager manager ); Empty a given cache manager. This simply gets rid of all the currently cached FT_Face and FT_Size objects within the manager. inout manager A handle to the manager. FTC_Manager_Done Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Manager_Done ( FTC_Manager manager ); Destroy a given manager after emptying it. input manager A handle to the target cache manager object. FTC_Manager_LookupFace Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_Manager_LookupFace ( FTC_Manager manager, FTC_FaceID face_id, FT_Face *aface ); Retrieve the FT_Face object that corresponds to a given face ID through a cache manager. input manager A handle to the cache manager. face_id The ID of the face object. output aface A handle to the face object. return FreeType error code. 0 means success. note The returned FT_Face object is always owned by the manager. You should never try to discard it yourself. The FT_Face object doesn't necessarily have a current size object (i.e., face- size can be 0). If you need a specific font size , use FTC_Manager_LookupSize instead. Never change the face's transformation matrix (i.e., never call the FT_Set_Transform function) on a returned face! If you need to transform glyphs, do it yourself after glyph loading. When you perform a lookup, out-of-memory errors are detected within the lookup and force incremental flushes of the cache until enough memory is released for the lookup to succeed. If a lookup fails with FT_Err_Out_Of_Memory the cache has already been completely flushed, and still no memory was available for the operation. FTC_Manager_LookupSize Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_Manager_LookupSize ( FTC_Manager manager, FTC_Scaler scaler, FT_Size *asize ); Retrieve the FT_Size object that corresponds to a given FTC_ScalerRec pointer through a cache manager. input manager A handle to the cache manager. scaler A scaler handle. output asize A handle to the size object. return FreeType error code. 0 means success. note The returned FT_Size object is always owned by the manager. You should never try to discard it by yourself. You can access the parent FT_Face object simply as size- face if you need it. Note that this object is also owned by the manager. note When you perform a lookup, out-of-memory errors are detected within the lookup and force incremental flushes of the cache until enough memory is released for the lookup to succeed. If a lookup fails with FT_Err_Out_Of_Memory the cache has already been completely flushed, and still no memory is available for the operation. FTC_Manager_RemoveFaceID Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Manager_RemoveFaceID ( FTC_Manager manager, FTC_FaceID face_id ); A special function used to indicate to the cache manager that a given FTC_FaceID is no longer valid, either because its content changed, or because it was deallocated or uninstalled. input manager The cache manager handle. face_id The FTC_FaceID to be removed. note This function flushes all nodes from the cache corresponding to this face_id , with the exception of nodes with a non-null reference count. Such nodes are however modified internally so as to never appear in later lookups with the same face_id value, and to be immediately destroyed when released by all their users. FTC_Node Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_NodeRec_* FTC_Node ; An opaque handle to a cache node object. Each cache node is reference-counted. A node with a count of 0 might be flushed out of a full cache whenever a lookup request is performed. If you look up nodes, you have the ability to acquire them, i.e., to increment their reference count. This will prevent the node from being flushed out of the cache until you explicitly release it (see FTC_Node_Unref ). See also FTC_SBitCache_Lookup and FTC_ImageCache_Lookup . FTC_Node_Unref Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Node_Unref ( FTC_Node node, FTC_Manager manager ); Decrement a cache node's internal reference count. When the count reaches 0, it is not destroyed but becomes eligible for subsequent cache flushes. input node The cache node handle. manager The cache manager handle. FTC_ImageCache Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ImageCacheRec_* FTC_ImageCache ; A handle to a glyph image cache object. They are designed to hold many distinct glyph images while not exceeding a certain memory threshold. FTC_ImageCache_New Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_ImageCache_New ( FTC_Manager manager, FTC_ImageCache *acache ); Create a new glyph image cache. input manager The parent manager for the image cache. output acache A handle to the new glyph image cache object. return FreeType error code. 0 means success. FTC_ImageCache_Lookup Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_ImageCache_Lookup ( FTC_ImageCache cache, FTC_ImageType type, FT_UInt gindex, FT_Glyph *aglyph, FTC_Node *anode ); Retrieve a given glyph image from a glyph image cache. input cache A handle to the source glyph image cache. type A pointer to a glyph image type descriptor. gindex The glyph index to retrieve. output aglyph The corresponding FT_Glyph object. 0 in case of failure. anode Used to return the address of the corresponding cache node after incrementing its reference count (see note below). return FreeType error code. 0 means success. note The returned glyph is owned and managed by the glyph image cache. Never try to transform or discard it manually! You can however create a copy with FT_Glyph_Copy and modify the new one. If anode is not NULL , it receives the address of the cache node containing the glyph image, after increasing its reference count. This ensures that the node (as well as the FT_Glyph ) will always be kept in the cache until you call FTC_Node_Unref to release it. If anode is NULL , the cache node is left unchanged, which means that the FT_Glyph could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent! FTC_SBit Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_SBitRec_* FTC_SBit ; A handle to a small bitmap descriptor. See the FTC_SBitRec structure for details. FTC_SBitCache Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_SBitCacheRec_* FTC_SBitCache ; A handle to a small bitmap cache. These are special cache objects used to store small glyph bitmaps (and anti-aliased pixmaps) in a much more efficient way than the traditional glyph image cache implemented by FTC_ImageCache . FTC_SBitCache_New Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_SBitCache_New ( FTC_Manager manager, FTC_SBitCache *acache ); Create a new cache to store small glyph bitmaps. input manager A handle to the source cache manager. output acache A handle to the new sbit cache. NULL in case of error. return FreeType error code. 0 means success. FTC_SBitCache_Lookup Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_SBitCache_Lookup ( FTC_SBitCache cache, FTC_ImageType type, FT_UInt gindex, FTC_SBit *sbit, FTC_Node *anode ); Look up a given small glyph bitmap in a given sbit cache and lock it to prevent its flushing from the cache until needed. input cache A handle to the source sbit cache. type A pointer to the glyph image type descriptor. gindex The glyph index. output sbit A handle to a small bitmap descriptor. anode Used to return the address of the corresponding cache node after incrementing its reference count (see note below). return FreeType error code. 0 means success. note The small bitmap descriptor and its bit buffer are owned by the cache and should never be freed by the application. They might as well disappear from memory on the next cache lookup, so don't treat them as persistent data. The descriptor's buffer field is set to 0 to indicate a missing glyph bitmap. If anode is not NULL , it receives the address of the cache node containing the bitmap, after increasing its reference count. This ensures that the node (as well as the image) will always be kept in the cache until you call FTC_Node_Unref to release it. If anode is NULL , the cache node is left unchanged, which means that the bitmap could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent! FTC_CMapCache Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_CMapCacheRec_* FTC_CMapCache ; An opaque handle used to model a charmap cache. This cache is to hold character codes - glyph indices mappings. FTC_CMapCache_New Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_CMapCache_New ( FTC_Manager manager, FTC_CMapCache *acache ); Create a new charmap cache. input manager A handle to the cache manager. output acache A new cache handle. NULL in case of error. return FreeType error code. 0 means success. note Like all other caches, this one will be destroyed with the cache manager. FTC_CMapCache_Lookup Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_UInt ) FTC_CMapCache_Lookup ( FTC_CMapCache cache, FTC_FaceID face_id, FT_Int cmap_index, FT_UInt32 char_code ); Translate a character code into a glyph index, using the charmap cache. input cache A charmap cache handle. face_id The source face ID. cmap_index The index of the charmap in the source face. Any negative value means to use the cache FT_Face 's default charmap. char_code The character code (in the corresponding charmap). return Glyph index. 0 means no glyph . FTC_ScalerRec Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ScalerRec_ { FTC_FaceID face_id; FT_UInt width; FT_UInt height; FT_Int pixel; FT_UInt x_res; FT_UInt y_res; } FTC_ScalerRec ; A structure used to describe a given character size in either pixels or points to the cache manager. See FTC_Manager_LookupSize . fields face_id The source face ID. width The character width. height The character height. pixel A Boolean. If 1, the width and height fields are interpreted as integer pixel character sizes. Otherwise, they are expressed as 1/64th of points. x_res Only used when pixel is value 0 to indicate the horizontal resolution in dpi. y_res Only used when pixel is value 0 to indicate the vertical resolution in dpi. note This type is mainly used to retrieve FT_Size objects through the cache manager. FTC_Scaler Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ScalerRec_* FTC_Scaler ; A handle to an FTC_ScalerRec structure. FTC_ImageTypeRec Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ImageTypeRec_ { FTC_FaceID face_id; FT_UInt width; FT_UInt height; FT_Int32 flags; } FTC_ImageTypeRec ; A structure used to model the type of images in a glyph cache. fields face_id The face ID. width The width in pixels. height The height in pixels. flags The load flags, as in FT_Load_Glyph . FTC_ImageType Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ImageTypeRec_* FTC_ImageType ; A handle to an FTC_ImageTypeRec structure. FTC_ImageCache_LookupScaler Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_ImageCache_LookupScaler ( FTC_ImageCache cache, FTC_Scaler scaler, FT_ULong load_flags, FT_UInt gindex, FT_Glyph *aglyph, FTC_Node *anode ); A variant of FTC_ImageCache_Lookup that uses an FTC_ScalerRec to specify the face ID and its size. input cache A handle to the source glyph image cache. scaler A pointer to a scaler descriptor. load_flags The corresponding load flags. gindex The glyph index to retrieve. output aglyph The corresponding FT_Glyph object. 0 in case of failure. anode Used to return the address of the corresponding cache node after incrementing its reference count (see note below). return FreeType error code. 0 means success. note The returned glyph is owned and managed by the glyph image cache. Never try to transform or discard it manually! You can however create a copy with FT_Glyph_Copy and modify the new one. If anode is not NULL , it receives the address of the cache node containing the glyph image, after increasing its reference count. This ensures that the node (as well as the FT_Glyph ) will always be kept in the cache until you call FTC_Node_Unref to release it. If anode is NULL , the cache node is left unchanged, which means that the FT_Glyph could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent! Calls to FT_Set_Char_Size and friends have no effect on cached glyphs; you should always use the FreeType cache API instead. FTC_SBitRec Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_SBitRec_ { FT_Byte width; FT_Byte height; FT_Char left; FT_Char top; FT_Byte format; FT_Byte max_grays; FT_Short pitch; FT_Char xadvance; FT_Char yadvance; FT_Byte * buffer; } FTC_SBitRec ; A very compact structure used to describe a small glyph bitmap. fields width The bitmap width in pixels. height The bitmap height in pixels. left The horizontal distance from the pen position to the left bitmap border (a.k.a. left side bearing , or lsb ). top The vertical distance from the pen position (on the baseline) to the upper bitmap border (a.k.a. top side bearing ). The distance is positive for upwards y coordinates. format The format of the glyph bitmap (monochrome or gray). max_grays Maximum gray level value (in the range 1 to 255). pitch The number of bytes per bitmap line. May be positive or negative. xadvance The horizontal advance width in pixels. yadvance The vertical advance height in pixels. buffer A pointer to the bitmap pixels. FTC_SBitCache_LookupScaler Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_SBitCache_LookupScaler ( FTC_SBitCache cache, FTC_Scaler scaler, FT_ULong load_flags, FT_UInt gindex, FTC_SBit *sbit, FTC_Node *anode ); A variant of FTC_SBitCache_Lookup that uses an FTC_ScalerRec to specify the face ID and its size. input cache A handle to the source sbit cache. scaler A pointer to the scaler descriptor. load_flags The corresponding load flags. gindex The glyph index. output sbit A handle to a small bitmap descriptor. anode Used to return the address of the corresponding cache node after incrementing its reference count (see note below). return FreeType error code. 0 means success. note The small bitmap descriptor and its bit buffer are owned by the cache and should never be freed by the application. They might as well disappear from memory on the next cache lookup, so don't treat them as persistent data. The descriptor's buffer field is set to 0 to indicate a missing glyph bitmap. If anode is not NULL , it receives the address of the cache node containing the bitmap, after increasing its reference count. This ensures that the node (as well as the image) will always be kept in the cache until you call FTC_Node_Unref to release it. If anode is NULL , the cache node is left unchanged, which means that the bitmap could be flushed out of the cache on the next call to one of the caching sub-system APIs. Don't assume that it is persistent!","title":"Cache Sub-System"},{"location":"ft2-cache_subsystem.html#cache-sub-system","text":"","title":"Cache Sub-System"},{"location":"ft2-cache_subsystem.html#synopsis","text":"This section describes the FreeType 2 cache sub-system, which is used to limit the number of concurrently opened FT_Face and FT_Size objects, as well as caching information like character maps and glyph images while limiting their maximum memory usage. Note that all types and functions begin with the FTC_ prefix. The cache is highly portable and thus doesn't know anything about the fonts installed on your system, or how to access them. This implies the following scheme: First, available or installed font faces are uniquely identified by FTC_FaceID values, provided to the cache by the client. Note that the cache only stores and compares these values, and doesn't try to interpret them in any way. Second, the cache calls, only when needed, a client-provided function to convert an FTC_FaceID into a new FT_Face object. The latter is then completely managed by the cache, including its termination through FT_Done_Face . To monitor termination of face objects, the finalizer callback in the generic field of the FT_Face object can be used, which might also be used to store the FTC_FaceID of the face. Clients are free to map face IDs to anything else. The most simple usage is to associate them to a (pathname,face_index) pair that is used to call FT_New_Face . However, more complex schemes are also possible. Note that for the cache to work correctly, the face ID values must be persistent , which means that the contents they point to should not change at runtime, or that their value should not become invalid. If this is unavoidable (e.g., when a font is uninstalled at runtime), you should call FTC_Manager_RemoveFaceID as soon as possible, to let the cache get rid of any references to the old FTC_FaceID it may keep internally. Failure to do so will lead to incorrect behaviour or even crashes. To use the cache, start with calling FTC_Manager_New to create a new FTC_Manager object, which models a single cache instance. You can then look up FT_Face and FT_Size objects with FTC_Manager_LookupFace and FTC_Manager_LookupSize , respectively. If you want to use the charmap caching, call FTC_CMapCache_New , then later use FTC_CMapCache_Lookup to perform the equivalent of FT_Get_Char_Index , only much faster. If you want to use the FT_Glyph caching, call FTC_ImageCache , then later use FTC_ImageCache_Lookup to retrieve the corresponding FT_Glyph objects from the cache. If you need lots of small bitmaps, it is much more memory efficient to call FTC_SBitCache_New followed by FTC_SBitCache_Lookup . This returns FTC_SBitRec structures, which are used to store small bitmaps directly. (A small bitmap is one whose metrics and dimensions all fit into 8-bit integers). We hope to also provide a kerning cache in the near future.","title":"Synopsis"},{"location":"ft2-cache_subsystem.html#ftc_manager","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ManagerRec_* FTC_Manager ; This object corresponds to one instance of the cache-subsystem. It is used to cache one or more FT_Face objects, along with corresponding FT_Size objects. The manager intentionally limits the total number of opened FT_Face and FT_Size objects to control memory usage. See the max_faces and max_sizes parameters of FTC_Manager_New . The manager is also used to cache nodes of various types while limiting their total memory usage. All limitations are enforced by keeping lists of managed objects in most-recently-used order, and flushing old nodes to make room for new ones.","title":"FTC_Manager"},{"location":"ft2-cache_subsystem.html#ftc_faceid","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef FT_Pointer FTC_FaceID ; An opaque pointer type that is used to identity face objects. The contents of such objects is application-dependent. These pointers are typically used to point to a user-defined structure containing a font file path, and face index.","title":"FTC_FaceID"},{"location":"ft2-cache_subsystem.html#ftc_face_requester","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef FT_Error (* FTC_Face_Requester )( FTC_FaceID face_id, FT_Library library, FT_Pointer req_data, FT_Face * aface ); A callback function provided by client applications. It is used by the cache manager to translate a given FTC_FaceID into a new valid FT_Face object, on demand.","title":"FTC_Face_Requester"},{"location":"ft2-cache_subsystem.html#ftc_manager_new","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_Manager_New ( FT_Library library, FT_UInt max_faces, FT_UInt max_sizes, FT_ULong max_bytes, FTC_Face_Requester requester, FT_Pointer req_data, FTC_Manager *amanager ); Create a new cache manager.","title":"FTC_Manager_New"},{"location":"ft2-cache_subsystem.html#ftc_manager_reset","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Manager_Reset ( FTC_Manager manager ); Empty a given cache manager. This simply gets rid of all the currently cached FT_Face and FT_Size objects within the manager.","title":"FTC_Manager_Reset"},{"location":"ft2-cache_subsystem.html#ftc_manager_done","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Manager_Done ( FTC_Manager manager ); Destroy a given manager after emptying it.","title":"FTC_Manager_Done"},{"location":"ft2-cache_subsystem.html#ftc_manager_lookupface","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_Manager_LookupFace ( FTC_Manager manager, FTC_FaceID face_id, FT_Face *aface ); Retrieve the FT_Face object that corresponds to a given face ID through a cache manager.","title":"FTC_Manager_LookupFace"},{"location":"ft2-cache_subsystem.html#ftc_manager_lookupsize","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_Manager_LookupSize ( FTC_Manager manager, FTC_Scaler scaler, FT_Size *asize ); Retrieve the FT_Size object that corresponds to a given FTC_ScalerRec pointer through a cache manager.","title":"FTC_Manager_LookupSize"},{"location":"ft2-cache_subsystem.html#ftc_manager_removefaceid","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Manager_RemoveFaceID ( FTC_Manager manager, FTC_FaceID face_id ); A special function used to indicate to the cache manager that a given FTC_FaceID is no longer valid, either because its content changed, or because it was deallocated or uninstalled.","title":"FTC_Manager_RemoveFaceID"},{"location":"ft2-cache_subsystem.html#ftc_node","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_NodeRec_* FTC_Node ; An opaque handle to a cache node object. Each cache node is reference-counted. A node with a count of 0 might be flushed out of a full cache whenever a lookup request is performed. If you look up nodes, you have the ability to acquire them, i.e., to increment their reference count. This will prevent the node from being flushed out of the cache until you explicitly release it (see FTC_Node_Unref ). See also FTC_SBitCache_Lookup and FTC_ImageCache_Lookup .","title":"FTC_Node"},{"location":"ft2-cache_subsystem.html#ftc_node_unref","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( void ) FTC_Node_Unref ( FTC_Node node, FTC_Manager manager ); Decrement a cache node's internal reference count. When the count reaches 0, it is not destroyed but becomes eligible for subsequent cache flushes.","title":"FTC_Node_Unref"},{"location":"ft2-cache_subsystem.html#ftc_imagecache","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ImageCacheRec_* FTC_ImageCache ; A handle to a glyph image cache object. They are designed to hold many distinct glyph images while not exceeding a certain memory threshold.","title":"FTC_ImageCache"},{"location":"ft2-cache_subsystem.html#ftc_imagecache_new","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_ImageCache_New ( FTC_Manager manager, FTC_ImageCache *acache ); Create a new glyph image cache.","title":"FTC_ImageCache_New"},{"location":"ft2-cache_subsystem.html#ftc_imagecache_lookup","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_ImageCache_Lookup ( FTC_ImageCache cache, FTC_ImageType type, FT_UInt gindex, FT_Glyph *aglyph, FTC_Node *anode ); Retrieve a given glyph image from a glyph image cache.","title":"FTC_ImageCache_Lookup"},{"location":"ft2-cache_subsystem.html#ftc_sbit","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_SBitRec_* FTC_SBit ; A handle to a small bitmap descriptor. See the FTC_SBitRec structure for details.","title":"FTC_SBit"},{"location":"ft2-cache_subsystem.html#ftc_sbitcache","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_SBitCacheRec_* FTC_SBitCache ; A handle to a small bitmap cache. These are special cache objects used to store small glyph bitmaps (and anti-aliased pixmaps) in a much more efficient way than the traditional glyph image cache implemented by FTC_ImageCache .","title":"FTC_SBitCache"},{"location":"ft2-cache_subsystem.html#ftc_sbitcache_new","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_SBitCache_New ( FTC_Manager manager, FTC_SBitCache *acache ); Create a new cache to store small glyph bitmaps.","title":"FTC_SBitCache_New"},{"location":"ft2-cache_subsystem.html#ftc_sbitcache_lookup","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_SBitCache_Lookup ( FTC_SBitCache cache, FTC_ImageType type, FT_UInt gindex, FTC_SBit *sbit, FTC_Node *anode ); Look up a given small glyph bitmap in a given sbit cache and lock it to prevent its flushing from the cache until needed.","title":"FTC_SBitCache_Lookup"},{"location":"ft2-cache_subsystem.html#ftc_cmapcache","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_CMapCacheRec_* FTC_CMapCache ; An opaque handle used to model a charmap cache. This cache is to hold character codes - glyph indices mappings.","title":"FTC_CMapCache"},{"location":"ft2-cache_subsystem.html#ftc_cmapcache_new","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_CMapCache_New ( FTC_Manager manager, FTC_CMapCache *acache ); Create a new charmap cache.","title":"FTC_CMapCache_New"},{"location":"ft2-cache_subsystem.html#ftc_cmapcache_lookup","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_UInt ) FTC_CMapCache_Lookup ( FTC_CMapCache cache, FTC_FaceID face_id, FT_Int cmap_index, FT_UInt32 char_code ); Translate a character code into a glyph index, using the charmap cache.","title":"FTC_CMapCache_Lookup"},{"location":"ft2-cache_subsystem.html#ftc_scalerrec","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ScalerRec_ { FTC_FaceID face_id; FT_UInt width; FT_UInt height; FT_Int pixel; FT_UInt x_res; FT_UInt y_res; } FTC_ScalerRec ; A structure used to describe a given character size in either pixels or points to the cache manager. See FTC_Manager_LookupSize .","title":"FTC_ScalerRec"},{"location":"ft2-cache_subsystem.html#ftc_scaler","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ScalerRec_* FTC_Scaler ; A handle to an FTC_ScalerRec structure.","title":"FTC_Scaler"},{"location":"ft2-cache_subsystem.html#ftc_imagetyperec","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ImageTypeRec_ { FTC_FaceID face_id; FT_UInt width; FT_UInt height; FT_Int32 flags; } FTC_ImageTypeRec ; A structure used to model the type of images in a glyph cache.","title":"FTC_ImageTypeRec"},{"location":"ft2-cache_subsystem.html#ftc_imagetype","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_ImageTypeRec_* FTC_ImageType ; A handle to an FTC_ImageTypeRec structure.","title":"FTC_ImageType"},{"location":"ft2-cache_subsystem.html#ftc_imagecache_lookupscaler","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_ImageCache_LookupScaler ( FTC_ImageCache cache, FTC_Scaler scaler, FT_ULong load_flags, FT_UInt gindex, FT_Glyph *aglyph, FTC_Node *anode ); A variant of FTC_ImageCache_Lookup that uses an FTC_ScalerRec to specify the face ID and its size.","title":"FTC_ImageCache_LookupScaler"},{"location":"ft2-cache_subsystem.html#ftc_sbitrec","text":"Defined in FT_CACHE_H (freetype/ftcache.h). typedef struct FTC_SBitRec_ { FT_Byte width; FT_Byte height; FT_Char left; FT_Char top; FT_Byte format; FT_Byte max_grays; FT_Short pitch; FT_Char xadvance; FT_Char yadvance; FT_Byte * buffer; } FTC_SBitRec ; A very compact structure used to describe a small glyph bitmap.","title":"FTC_SBitRec"},{"location":"ft2-cache_subsystem.html#ftc_sbitcache_lookupscaler","text":"Defined in FT_CACHE_H (freetype/ftcache.h). FT_EXPORT( FT_Error ) FTC_SBitCache_LookupScaler ( FTC_SBitCache cache, FTC_Scaler scaler, FT_ULong load_flags, FT_UInt gindex, FTC_SBit *sbit, FTC_Node *anode ); A variant of FTC_SBitCache_Lookup that uses an FTC_ScalerRec to specify the face ID and its size.","title":"FTC_SBitCache_LookupScaler"},{"location":"ft2-cff_driver.html","text":"FreeType Docs Controlling FreeType Modules The CFF driver The CFF driver Synopsis While FreeType's CFF driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get . The CFF driver's module name is cff . Available properties are hinting-engine , no-stem-darkening , darkening-parameters , and random-seed , as documented in the Driver properties section. Hinting and antialiasing principles of the new engine The rasterizer is positioning horizontal features (e.g., ascender height x-height, or crossbars) on the pixel grid and minimizing the amount of antialiasing applied to them, while placing vertical features (vertical stems) on the pixel grid without hinting, thus representing the stem position and weight accurately. Sometimes the vertical stems may be only partially black. In this context, antialiasing means that stems are not positioned exactly on pixel borders, causing a fuzzy appearance. There are two principles behind this approach. 1) No hinting in the horizontal direction: Unlike superhinted TrueType, which changes glyph widths to accommodate regular inter-glyph spacing, Adobe's approach is faithful to the design in representing both the glyph width and the inter-glyph spacing designed for the font. This makes the screen display as close as it can be to the result one would get with infinite resolution, while preserving what is considered the key characteristics of each glyph. Note that the distances between unhinted and grid-fitted positions at small sizes are comparable to kerning values and thus would be noticeable (and distracting) while reading if hinting were applied. One of the reasons to not hint horizontally is antialiasing for LCD screens: The pixel geometry of modern displays supplies three vertical subpixels as the eye moves horizontally across each visible pixel. On devices where we can be certain this characteristic is present a rasterizer can take advantage of the subpixels to add increments of weight. In Western writing systems this turns out to be the more critical direction anyway; the weights and spacing of vertical stems (see above) are central to Armenian, Cyrillic, Greek, and Latin type designs. Even when the rasterizer uses greyscale antialiasing instead of color (a necessary compromise when one doesn't know the screen characteristics), the unhinted vertical features preserve the design's weight and spacing much better than aliased type would. 2) Alignment in the vertical direction: Weights and spacing along the y axis are less critical; what is much more important is the visual alignment of related features (like cap-height and x-height). The sense of alignment for these is enhanced by the sharpness of grid-fit edges, while the cruder vertical resolution (full pixels instead of pixels) is less of a problem. On the technical side, horizontal alignment zones for ascender, x-height, and other important height values (traditionally called blue zones ) as defined in the font are positioned independently, each being rounded to the nearest pixel edge, taking care of overshoot suppression at small sizes, stem darkening, and scaling. Hstems (this is, hint values defined in the font to help align horizontal features) that fall within a blue zone are said to be captured and are aligned to that zone. Uncaptured stems are moved in one of four ways, top edge up or down, bottom edge up or down. Unless there are conflicting hstems, the smallest movement is taken to minimize distortion.","title":"The CFF driver"},{"location":"ft2-cff_driver.html#the-cff-driver","text":"","title":"The CFF driver"},{"location":"ft2-cff_driver.html#synopsis","text":"While FreeType's CFF driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get . The CFF driver's module name is cff . Available properties are hinting-engine , no-stem-darkening , darkening-parameters , and random-seed , as documented in the Driver properties section. Hinting and antialiasing principles of the new engine The rasterizer is positioning horizontal features (e.g., ascender height x-height, or crossbars) on the pixel grid and minimizing the amount of antialiasing applied to them, while placing vertical features (vertical stems) on the pixel grid without hinting, thus representing the stem position and weight accurately. Sometimes the vertical stems may be only partially black. In this context, antialiasing means that stems are not positioned exactly on pixel borders, causing a fuzzy appearance. There are two principles behind this approach. 1) No hinting in the horizontal direction: Unlike superhinted TrueType, which changes glyph widths to accommodate regular inter-glyph spacing, Adobe's approach is faithful to the design in representing both the glyph width and the inter-glyph spacing designed for the font. This makes the screen display as close as it can be to the result one would get with infinite resolution, while preserving what is considered the key characteristics of each glyph. Note that the distances between unhinted and grid-fitted positions at small sizes are comparable to kerning values and thus would be noticeable (and distracting) while reading if hinting were applied. One of the reasons to not hint horizontally is antialiasing for LCD screens: The pixel geometry of modern displays supplies three vertical subpixels as the eye moves horizontally across each visible pixel. On devices where we can be certain this characteristic is present a rasterizer can take advantage of the subpixels to add increments of weight. In Western writing systems this turns out to be the more critical direction anyway; the weights and spacing of vertical stems (see above) are central to Armenian, Cyrillic, Greek, and Latin type designs. Even when the rasterizer uses greyscale antialiasing instead of color (a necessary compromise when one doesn't know the screen characteristics), the unhinted vertical features preserve the design's weight and spacing much better than aliased type would. 2) Alignment in the vertical direction: Weights and spacing along the y axis are less critical; what is much more important is the visual alignment of related features (like cap-height and x-height). The sense of alignment for these is enhanced by the sharpness of grid-fit edges, while the cruder vertical resolution (full pixels instead of pixels) is less of a problem. On the technical side, horizontal alignment zones for ascender, x-height, and other important height values (traditionally called blue zones ) as defined in the font are positioned independently, each being rounded to the nearest pixel edge, taking care of overshoot suppression at small sizes, stem darkening, and scaling. Hstems (this is, hint values defined in the font to help align horizontal features) that fall within a blue zone are said to be captured and are aligned to that zone. Uncaptured stems are moved in one of four ways, top edge up or down, bottom edge up or down. Unless there are conflicting hstems, the smallest movement is taken to minimize distortion.","title":"Synopsis"},{"location":"ft2-cid_fonts.html","text":"FreeType Docs Format-Specific API CID Fonts CID Fonts Synopsis This section contains the declaration of CID-keyed font-specific functions. FT_Get_CID_Registry_Ordering_Supplement Defined in FT_CID_H (freetype/ftcid.h). FT_EXPORT( FT_Error ) FT_Get_CID_Registry_Ordering_Supplement ( FT_Face face, const char * *registry, const char * *ordering, FT_Int *supplement ); Retrieve the Registry/Ordering/Supplement triple (also known as the \"R/O/S\") from a CID-keyed font. input face A handle to the input face. output registry The registry, as a C string, owned by the face. ordering The ordering, as a C string, owned by the face. supplement The supplement. return FreeType error code. 0 means success. note This function only works with CID faces, returning an error otherwise. since 2.3.6 FT_Get_CID_Is_Internally_CID_Keyed Defined in FT_CID_H (freetype/ftcid.h). FT_EXPORT( FT_Error ) FT_Get_CID_Is_Internally_CID_Keyed ( FT_Face face, FT_Bool *is_cid ); Retrieve the type of the input face, CID keyed or not. In contrast to the FT_IS_CID_KEYED macro this function returns successfully also for CID-keyed fonts in an SFNT wrapper. input face A handle to the input face. output is_cid The type of the face as an FT_Bool . return FreeType error code. 0 means success. note This function only works with CID faces and OpenType fonts, returning an error otherwise. since 2.3.9 FT_Get_CID_From_Glyph_Index Defined in FT_CID_H (freetype/ftcid.h). FT_EXPORT( FT_Error ) FT_Get_CID_From_Glyph_Index ( FT_Face face, FT_UInt glyph_index, FT_UInt *cid ); Retrieve the CID of the input glyph index. input face A handle to the input face. glyph_index The input glyph index. output cid The CID as an FT_UInt . return FreeType error code. 0 means success. note This function only works with CID faces and OpenType fonts, returning an error otherwise. since 2.3.9","title":"CID Fonts"},{"location":"ft2-cid_fonts.html#cid-fonts","text":"","title":"CID Fonts"},{"location":"ft2-cid_fonts.html#synopsis","text":"This section contains the declaration of CID-keyed font-specific functions.","title":"Synopsis"},{"location":"ft2-cid_fonts.html#ft_get_cid_registry_ordering_supplement","text":"Defined in FT_CID_H (freetype/ftcid.h). FT_EXPORT( FT_Error ) FT_Get_CID_Registry_Ordering_Supplement ( FT_Face face, const char * *registry, const char * *ordering, FT_Int *supplement ); Retrieve the Registry/Ordering/Supplement triple (also known as the \"R/O/S\") from a CID-keyed font.","title":"FT_Get_CID_Registry_Ordering_Supplement"},{"location":"ft2-cid_fonts.html#ft_get_cid_is_internally_cid_keyed","text":"Defined in FT_CID_H (freetype/ftcid.h). FT_EXPORT( FT_Error ) FT_Get_CID_Is_Internally_CID_Keyed ( FT_Face face, FT_Bool *is_cid ); Retrieve the type of the input face, CID keyed or not. In contrast to the FT_IS_CID_KEYED macro this function returns successfully also for CID-keyed fonts in an SFNT wrapper.","title":"FT_Get_CID_Is_Internally_CID_Keyed"},{"location":"ft2-cid_fonts.html#ft_get_cid_from_glyph_index","text":"Defined in FT_CID_H (freetype/ftcid.h). FT_EXPORT( FT_Error ) FT_Get_CID_From_Glyph_Index ( FT_Face face, FT_UInt glyph_index, FT_UInt *cid ); Retrieve the CID of the input glyph index.","title":"FT_Get_CID_From_Glyph_Index"},{"location":"ft2-color_management.html","text":"FreeType Docs Core API Glyph Color Management Glyph Color Management Synopsis The functions described here allow access and manipulation of color palette entries in OpenType's CPAL tables. FT_Color Defined in FT_COLOR_H (freetype/ftcolor.h). typedef struct FT_Color_ { FT_Byte blue; FT_Byte green; FT_Byte red; FT_Byte alpha; } FT_Color ; This structure models a BGRA color value of a CPAL palette entry. The used color space is sRGB; the colors are not pre-multiplied, and alpha values must be explicitly set. fields blue Blue value. green Green value. red Red value. alpha Alpha value, giving the red, green, and blue color's opacity. since 2.10 FT_PALETTE_XXX Defined in FT_COLOR_H (freetype/ftcolor.h). # define FT_PALETTE_FOR_LIGHT_BACKGROUND 0x01 # define FT_PALETTE_FOR_DARK_BACKGROUND 0x02 A list of bit field constants used in the palette_flags array of the FT_Palette_Data structure to indicate for which background a palette with a given index is usable. values FT_PALETTE_FOR_LIGHT_BACKGROUND The palette is appropriate to use when displaying the font on a light background such as white. FT_PALETTE_FOR_DARK_BACKGROUND The palette is appropriate to use when displaying the font on a dark background such as black. since 2.10 FT_Palette_Data Defined in FT_COLOR_H (freetype/ftcolor.h). typedef struct FT_Palette_Data_ { FT_UShort num_palettes; const FT_UShort * palette_name_ids; const FT_UShort * palette_flags; FT_UShort num_palette_entries; const FT_UShort * palette_entry_name_ids; } FT_Palette_Data ; This structure holds the data of the CPAL table. fields num_palettes The number of palettes. palette_name_ids A read-only array of palette name IDs with num_palettes elements, corresponding to entries like dark or light in the font's name table. An empty name ID in the CPAL table gets represented as value 0xFFFF. NULL if the font's CPAL table doesn't contain appropriate data. palette_flags A read-only array of palette flags with num_palettes elements. Possible values are an ORed combination of FT_PALETTE_FOR_LIGHT_BACKGROUND and FT_PALETTE_FOR_DARK_BACKGROUND . NULL if the font's CPAL table doesn't contain appropriate data. num_palette_entries The number of entries in a single palette. All palettes have the same size. palette_entry_name_ids A read-only array of palette entry name IDs with num_palette_entries . In each palette, entries with the same index have the same function. For example, index 0 might correspond to string outline in the font's name table to indicate that this palette entry is used for outlines, index 1 might correspond to fill to indicate the filling color palette entry, etc. An empty entry name ID in the CPAL table gets represented as value 0xFFFF. NULL if the font's CPAL table doesn't contain appropriate data. note Use function FT_Get_Sfnt_Name to map name IDs and entry name IDs to name strings. since 2.10 FT_Palette_Data_Get Defined in FT_COLOR_H (freetype/ftcolor.h). FT_EXPORT( FT_Error ) FT_Palette_Data_Get ( FT_Face face, FT_Palette_Data *apalette ); Retrieve the face's color palette data. input face The source face handle. output apalette A pointer to an FT_Palette_Data structure. return FreeType error code. 0 means success. note All arrays in the returned FT_Palette_Data structure are read-only. This function always returns an error if the config macro TT_CONFIG_OPTION_COLOR_LAYERS is not defined in ftoption.h . since 2.10 FT_Palette_Select Defined in FT_COLOR_H (freetype/ftcolor.h). FT_EXPORT( FT_Error ) FT_Palette_Select ( FT_Face face, FT_UShort palette_index, FT_Color * *apalette ); This function has two purposes. (1) It activates a palette for rendering color glyphs, and (2) it retrieves all (unmodified) color entries of this palette. This function returns a read-write array, which means that a calling application can modify the palette entries on demand. A corollary of (2) is that calling the function, then modifying some values, then calling the function again with the same arguments resets all color entries to the original CPAL values; all user modifications are lost. input face The source face handle. palette_index The palette index. output apalette An array of color entries for a palette with index palette_index , having num_palette_entries elements (as found in the FT_Palette_Data structure). If apalette is set to NULL , no array gets returned (and no color entries can be modified). In case the font doesn't support color palettes, NULL is returned. return FreeType error code. 0 means success. note The array pointed to by apalette_entries is owned and managed by FreeType. This function always returns an error if the config macro TT_CONFIG_OPTION_COLOR_LAYERS is not defined in ftoption.h . since 2.10 FT_Palette_Set_Foreground_Color Defined in FT_COLOR_H (freetype/ftcolor.h). FT_EXPORT( FT_Error ) FT_Palette_Set_Foreground_Color ( FT_Face face, FT_Color foreground_color ); COLR uses palette index 0xFFFF to indicate a text foreground color . This function sets this value. input face The source face handle. foreground_color An FT_Color structure to define the text foreground color. return FreeType error code. 0 means success. note If this function isn't called, the text foreground color is set to white opaque (BGRA value 0xFFFFFFFF) if FT_PALETTE_FOR_DARK_BACKGROUND is present for the current palette, and black opaque (BGRA value 0x000000FF) otherwise, including the case that no palette types are available in the CPAL table. This function always returns an error if the config macro TT_CONFIG_OPTION_COLOR_LAYERS is not defined in ftoption.h . since 2.10","title":"Glyph Color Management"},{"location":"ft2-color_management.html#glyph-color-management","text":"","title":"Glyph Color Management"},{"location":"ft2-color_management.html#synopsis","text":"The functions described here allow access and manipulation of color palette entries in OpenType's CPAL tables.","title":"Synopsis"},{"location":"ft2-color_management.html#ft_color","text":"Defined in FT_COLOR_H (freetype/ftcolor.h). typedef struct FT_Color_ { FT_Byte blue; FT_Byte green; FT_Byte red; FT_Byte alpha; } FT_Color ; This structure models a BGRA color value of a CPAL palette entry. The used color space is sRGB; the colors are not pre-multiplied, and alpha values must be explicitly set.","title":"FT_Color"},{"location":"ft2-color_management.html#ft_palette_xxx","text":"Defined in FT_COLOR_H (freetype/ftcolor.h). # define FT_PALETTE_FOR_LIGHT_BACKGROUND 0x01 # define FT_PALETTE_FOR_DARK_BACKGROUND 0x02 A list of bit field constants used in the palette_flags array of the FT_Palette_Data structure to indicate for which background a palette with a given index is usable.","title":"FT_PALETTE_XXX"},{"location":"ft2-color_management.html#ft_palette_data","text":"Defined in FT_COLOR_H (freetype/ftcolor.h). typedef struct FT_Palette_Data_ { FT_UShort num_palettes; const FT_UShort * palette_name_ids; const FT_UShort * palette_flags; FT_UShort num_palette_entries; const FT_UShort * palette_entry_name_ids; } FT_Palette_Data ; This structure holds the data of the CPAL table.","title":"FT_Palette_Data"},{"location":"ft2-color_management.html#ft_palette_data_get","text":"Defined in FT_COLOR_H (freetype/ftcolor.h). FT_EXPORT( FT_Error ) FT_Palette_Data_Get ( FT_Face face, FT_Palette_Data *apalette ); Retrieve the face's color palette data.","title":"FT_Palette_Data_Get"},{"location":"ft2-color_management.html#ft_palette_select","text":"Defined in FT_COLOR_H (freetype/ftcolor.h). FT_EXPORT( FT_Error ) FT_Palette_Select ( FT_Face face, FT_UShort palette_index, FT_Color * *apalette ); This function has two purposes. (1) It activates a palette for rendering color glyphs, and (2) it retrieves all (unmodified) color entries of this palette. This function returns a read-write array, which means that a calling application can modify the palette entries on demand. A corollary of (2) is that calling the function, then modifying some values, then calling the function again with the same arguments resets all color entries to the original CPAL values; all user modifications are lost.","title":"FT_Palette_Select"},{"location":"ft2-color_management.html#ft_palette_set_foreground_color","text":"Defined in FT_COLOR_H (freetype/ftcolor.h). FT_EXPORT( FT_Error ) FT_Palette_Set_Foreground_Color ( FT_Face face, FT_Color foreground_color ); COLR uses palette index 0xFFFF to indicate a text foreground color . This function sets this value.","title":"FT_Palette_Set_Foreground_Color"},{"location":"ft2-computations.html","text":"FreeType Docs Support API Computations Computations Synopsis This section contains various functions used to perform computations on 16.16 fixed-float numbers or 2d vectors. Attention : Most arithmetic functions take FT_Long as arguments. For historical reasons, FreeType was designed under the assumption that FT_Long is a 32-bit integer; results can thus be undefined if the arguments don't fit into 32 bits. FT_MulDiv Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Long ) FT_MulDiv ( FT_Long a, FT_Long b, FT_Long c ); Compute (a*b)/c with maximum accuracy, using a 64-bit intermediate integer whenever necessary. This function isn't necessarily as fast as some processor-specific operations, but is at least completely portable. input a The first multiplier. b The second multiplier. c The divisor. return The result of (a*b)/c . This function never traps when trying to divide by zero; it simply returns MaxInt or MinInt depending on the signs of a and b . FT_MulFix Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Long ) FT_MulFix ( FT_Long a, FT_Long b ); Compute (a*b)/0x10000 with maximum accuracy. Its main use is to multiply a given value by a 16.16 fixed-point factor. input a The first multiplier. b The second multiplier. Use a 16.16 factor here whenever possible (see note below). return The result of (a*b)/0x10000 . note This function has been optimized for the case where the absolute value of a is less than 2048, and b is a 16.16 scaling factor. As this happens mainly when scaling from notional units to fractional pixels in FreeType, it resulted in noticeable speed improvements between versions 2.x and 1.x. As a conclusion, always try to place a 16.16 factor as the second argument of this function; this can make a great difference. FT_DivFix Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Long ) FT_DivFix ( FT_Long a, FT_Long b ); Compute (a*0x10000)/b with maximum accuracy. Its main use is to divide a given value by a 16.16 fixed-point factor. input a The numerator. b The denominator. Use a 16.16 factor here. return The result of (a*0x10000)/b . FT_RoundFix Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Fixed ) FT_RoundFix ( FT_Fixed a ); Round a 16.16 fixed number. input a The number to be rounded. return a rounded to the nearest 16.16 fixed integer, halfway cases away from zero. note The function uses wrap-around arithmetic. FT_CeilFix Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Fixed ) FT_CeilFix ( FT_Fixed a ); Compute the smallest following integer of a 16.16 fixed number. input a The number for which the ceiling function is to be computed. return a rounded towards plus infinity. note The function uses wrap-around arithmetic. FT_FloorFix Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Fixed ) FT_FloorFix ( FT_Fixed a ); Compute the largest previous integer of a 16.16 fixed number. input a The number for which the floor function is to be computed. return a rounded towards minus infinity. FT_Vector_Transform Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( void ) FT_Vector_Transform ( FT_Vector * vector, const FT_Matrix * matrix ); Transform a single vector through a 2x2 matrix. inout vector The target vector to transform. input matrix A pointer to the source 2x2 matrix. note The result is undefined if either vector or matrix is invalid. FT_Matrix_Multiply Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( void ) FT_Matrix_Multiply ( const FT_Matrix * a, FT_Matrix * b ); Perform the matrix operation b = a*b . input a A pointer to matrix a . inout b A pointer to matrix b . note The result is undefined if either a or b is zero. Since the function uses wrap-around arithmetic, results become meaningless if the arguments are very large. FT_Matrix_Invert Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Matrix_Invert ( FT_Matrix * matrix ); Invert a 2x2 matrix. Return an error if it can't be inverted. inout matrix A pointer to the target matrix. Remains untouched in case of error. return FreeType error code. 0 means success. FT_Angle Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). typedef FT_Fixed FT_Angle ; This type is used to model angle values in FreeType. Note that the angle is a 16.16 fixed-point value expressed in degrees. FT_ANGLE_PI Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_PI ( 180L 16 ) The angle pi expressed in FT_Angle units. FT_ANGLE_2PI Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_2PI ( FT_ANGLE_PI * 2 ) The angle 2*pi expressed in FT_Angle units. FT_ANGLE_PI2 Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_PI2 ( FT_ANGLE_PI / 2 ) The angle pi/2 expressed in FT_Angle units. FT_ANGLE_PI4 Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_PI4 ( FT_ANGLE_PI / 4 ) The angle pi/4 expressed in FT_Angle units. FT_Sin Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Sin ( FT_Angle angle ); Return the sinus of a given angle in fixed-point format. input angle The input angle. return The sinus value. note If you need both the sinus and cosinus for a given angle, use the function FT_Vector_Unit . FT_Cos Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Cos ( FT_Angle angle ); Return the cosinus of a given angle in fixed-point format. input angle The input angle. return The cosinus value. note If you need both the sinus and cosinus for a given angle, use the function FT_Vector_Unit . FT_Tan Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Tan ( FT_Angle angle ); Return the tangent of a given angle in fixed-point format. input angle The input angle. return The tangent value. FT_Atan2 Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Angle ) FT_Atan2 ( FT_Fixed x, FT_Fixed y ); Return the arc-tangent corresponding to a given vector (x,y) in the 2d plane. input x The horizontal vector coordinate. y The vertical vector coordinate. return The arc-tangent value (i.e. angle). FT_Angle_Diff Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Angle ) FT_Angle_Diff ( FT_Angle angle1, FT_Angle angle2 ); Return the difference between two angles. The result is always constrained to the ]-PI..PI] interval. input angle1 First angle. angle2 Second angle. return Constrained value of angle2-angle1 . FT_Vector_Unit Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_Unit ( FT_Vector * vec, FT_Angle angle ); Return the unit vector corresponding to a given angle. After the call, the value of vec.x will be cos(angle) , and the value of vec.y will be sin(angle) . This function is useful to retrieve both the sinus and cosinus of a given angle quickly. output vec The address of target vector. input angle The input angle. FT_Vector_Rotate Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_Rotate ( FT_Vector * vec, FT_Angle angle ); Rotate a vector by a given angle. inout vec The address of target vector. input angle The input angle. FT_Vector_Length Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Vector_Length ( FT_Vector * vec ); Return the length of a given vector. input vec The address of target vector. return The vector length, expressed in the same units that the original vector coordinates. FT_Vector_Polarize Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_Polarize ( FT_Vector * vec, FT_Fixed *length, FT_Angle *angle ); Compute both the length and angle of a given vector. input vec The address of source vector. output length The vector length. angle The vector angle. FT_Vector_From_Polar Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_From_Polar ( FT_Vector * vec, FT_Fixed length, FT_Angle angle ); Compute vector coordinates from a length and angle. output vec The address of source vector. input length The vector length. angle The vector angle.","title":"Computations"},{"location":"ft2-computations.html#computations","text":"","title":"Computations"},{"location":"ft2-computations.html#synopsis","text":"This section contains various functions used to perform computations on 16.16 fixed-float numbers or 2d vectors. Attention : Most arithmetic functions take FT_Long as arguments. For historical reasons, FreeType was designed under the assumption that FT_Long is a 32-bit integer; results can thus be undefined if the arguments don't fit into 32 bits.","title":"Synopsis"},{"location":"ft2-computations.html#ft_muldiv","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Long ) FT_MulDiv ( FT_Long a, FT_Long b, FT_Long c ); Compute (a*b)/c with maximum accuracy, using a 64-bit intermediate integer whenever necessary. This function isn't necessarily as fast as some processor-specific operations, but is at least completely portable.","title":"FT_MulDiv"},{"location":"ft2-computations.html#ft_mulfix","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Long ) FT_MulFix ( FT_Long a, FT_Long b ); Compute (a*b)/0x10000 with maximum accuracy. Its main use is to multiply a given value by a 16.16 fixed-point factor.","title":"FT_MulFix"},{"location":"ft2-computations.html#ft_divfix","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Long ) FT_DivFix ( FT_Long a, FT_Long b ); Compute (a*0x10000)/b with maximum accuracy. Its main use is to divide a given value by a 16.16 fixed-point factor.","title":"FT_DivFix"},{"location":"ft2-computations.html#ft_roundfix","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Fixed ) FT_RoundFix ( FT_Fixed a ); Round a 16.16 fixed number.","title":"FT_RoundFix"},{"location":"ft2-computations.html#ft_ceilfix","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Fixed ) FT_CeilFix ( FT_Fixed a ); Compute the smallest following integer of a 16.16 fixed number.","title":"FT_CeilFix"},{"location":"ft2-computations.html#ft_floorfix","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Fixed ) FT_FloorFix ( FT_Fixed a ); Compute the largest previous integer of a 16.16 fixed number.","title":"FT_FloorFix"},{"location":"ft2-computations.html#ft_vector_transform","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( void ) FT_Vector_Transform ( FT_Vector * vector, const FT_Matrix * matrix ); Transform a single vector through a 2x2 matrix.","title":"FT_Vector_Transform"},{"location":"ft2-computations.html#ft_matrix_multiply","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( void ) FT_Matrix_Multiply ( const FT_Matrix * a, FT_Matrix * b ); Perform the matrix operation b = a*b .","title":"FT_Matrix_Multiply"},{"location":"ft2-computations.html#ft_matrix_invert","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Matrix_Invert ( FT_Matrix * matrix ); Invert a 2x2 matrix. Return an error if it can't be inverted.","title":"FT_Matrix_Invert"},{"location":"ft2-computations.html#ft_angle","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). typedef FT_Fixed FT_Angle ; This type is used to model angle values in FreeType. Note that the angle is a 16.16 fixed-point value expressed in degrees.","title":"FT_Angle"},{"location":"ft2-computations.html#ft_angle_pi","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_PI ( 180L 16 ) The angle pi expressed in FT_Angle units.","title":"FT_ANGLE_PI"},{"location":"ft2-computations.html#ft_angle_2pi","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_2PI ( FT_ANGLE_PI * 2 ) The angle 2*pi expressed in FT_Angle units.","title":"FT_ANGLE_2PI"},{"location":"ft2-computations.html#ft_angle_pi2","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_PI2 ( FT_ANGLE_PI / 2 ) The angle pi/2 expressed in FT_Angle units.","title":"FT_ANGLE_PI2"},{"location":"ft2-computations.html#ft_angle_pi4","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). # define FT_ANGLE_PI4 ( FT_ANGLE_PI / 4 ) The angle pi/4 expressed in FT_Angle units.","title":"FT_ANGLE_PI4"},{"location":"ft2-computations.html#ft_sin","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Sin ( FT_Angle angle ); Return the sinus of a given angle in fixed-point format.","title":"FT_Sin"},{"location":"ft2-computations.html#ft_cos","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Cos ( FT_Angle angle ); Return the cosinus of a given angle in fixed-point format.","title":"FT_Cos"},{"location":"ft2-computations.html#ft_tan","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Tan ( FT_Angle angle ); Return the tangent of a given angle in fixed-point format.","title":"FT_Tan"},{"location":"ft2-computations.html#ft_atan2","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Angle ) FT_Atan2 ( FT_Fixed x, FT_Fixed y ); Return the arc-tangent corresponding to a given vector (x,y) in the 2d plane.","title":"FT_Atan2"},{"location":"ft2-computations.html#ft_angle_diff","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Angle ) FT_Angle_Diff ( FT_Angle angle1, FT_Angle angle2 ); Return the difference between two angles. The result is always constrained to the ]-PI..PI] interval.","title":"FT_Angle_Diff"},{"location":"ft2-computations.html#ft_vector_unit","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_Unit ( FT_Vector * vec, FT_Angle angle ); Return the unit vector corresponding to a given angle. After the call, the value of vec.x will be cos(angle) , and the value of vec.y will be sin(angle) . This function is useful to retrieve both the sinus and cosinus of a given angle quickly.","title":"FT_Vector_Unit"},{"location":"ft2-computations.html#ft_vector_rotate","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_Rotate ( FT_Vector * vec, FT_Angle angle ); Rotate a vector by a given angle.","title":"FT_Vector_Rotate"},{"location":"ft2-computations.html#ft_vector_length","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( FT_Fixed ) FT_Vector_Length ( FT_Vector * vec ); Return the length of a given vector.","title":"FT_Vector_Length"},{"location":"ft2-computations.html#ft_vector_polarize","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_Polarize ( FT_Vector * vec, FT_Fixed *length, FT_Angle *angle ); Compute both the length and angle of a given vector.","title":"FT_Vector_Polarize"},{"location":"ft2-computations.html#ft_vector_from_polar","text":"Defined in FT_TRIGONOMETRY_H (freetype/fttrigon.h). FT_EXPORT( void ) FT_Vector_From_Polar ( FT_Vector * vec, FT_Fixed length, FT_Angle angle ); Compute vector coordinates from a length and angle.","title":"FT_Vector_From_Polar"},{"location":"ft2-error_code_values.html","text":"FreeType Docs Error Codes Error Code Values Error Code Values Synopsis The list below is taken verbatim from the file fterrdef.h (loaded automatically by including FT_FREETYPE_H ). The first argument of the FT_ERROR_DEF_ macro is the error label; by default, the prefix FT_Err_ gets added so that you get error names like FT_Err_Cannot_Open_Resource . The second argument is the error code, and the last argument an error string, which is not used by FreeType. Within your application you should only use error names and never its numeric values! The latter might (and actually do) change in forthcoming FreeType versions. Macro FT_NOERRORDEF_ defines FT_Err_Ok , which is always zero. See the Error Enumerations subsection how to automatically generate a list of error strings. FT_Err_XXX /* generic errors */ FT_NOERRORDEF_( Ok, 0x00, \"no error\" ) FT_ERRORDEF_( Cannot_Open_Resource, 0x01, \"cannot open resource\" ) FT_ERRORDEF_( Unknown_File_Format, 0x02, \"unknown file format\" ) FT_ERRORDEF_( Invalid_File_Format, 0x03, \"broken file\" ) FT_ERRORDEF_( Invalid_Version, 0x04, \"invalid FreeType version\" ) FT_ERRORDEF_( Lower_Module_Version, 0x05, \"module version is too low\" ) FT_ERRORDEF_( Invalid_Argument, 0x06, \"invalid argument\" ) FT_ERRORDEF_( Unimplemented_Feature, 0x07, \"unimplemented feature\" ) FT_ERRORDEF_( Invalid_Table, 0x08, \"broken table\" ) FT_ERRORDEF_( Invalid_Offset, 0x09, \"broken offset within table\" ) FT_ERRORDEF_( Array_Too_Large, 0x0A, \"array allocation size too large\" ) FT_ERRORDEF_( Missing_Module, 0x0B, \"missing module\" ) FT_ERRORDEF_( Missing_Property, 0x0C, \"missing property\" ) /* glyph/character errors */ FT_ERRORDEF_( Invalid_Glyph_Index, 0x10, \"invalid glyph index\" ) FT_ERRORDEF_( Invalid_Character_Code, 0x11, \"invalid character code\" ) FT_ERRORDEF_( Invalid_Glyph_Format, 0x12, \"unsupported glyph image format\" ) FT_ERRORDEF_( Cannot_Render_Glyph, 0x13, \"cannot render this glyph format\" ) FT_ERRORDEF_( Invalid_Outline, 0x14, \"invalid outline\" ) FT_ERRORDEF_( Invalid_Composite, 0x15, \"invalid composite glyph\" ) FT_ERRORDEF_( Too_Many_Hints, 0x16, \"too many hints\" ) FT_ERRORDEF_( Invalid_Pixel_Size, 0x17, \"invalid pixel size\" ) /* handle errors */ FT_ERRORDEF_( Invalid_Handle, 0x20, \"invalid object handle\" ) FT_ERRORDEF_( Invalid_Library_Handle, 0x21, \"invalid library handle\" ) FT_ERRORDEF_( Invalid_Driver_Handle, 0x22, \"invalid module handle\" ) FT_ERRORDEF_( Invalid_Face_Handle, 0x23, \"invalid face handle\" ) FT_ERRORDEF_( Invalid_Size_Handle, 0x24, \"invalid size handle\" ) FT_ERRORDEF_( Invalid_Slot_Handle, 0x25, \"invalid glyph slot handle\" ) FT_ERRORDEF_( Invalid_CharMap_Handle, 0x26, \"invalid charmap handle\" ) FT_ERRORDEF_( Invalid_Cache_Handle, 0x27, \"invalid cache manager handle\" ) FT_ERRORDEF_( Invalid_Stream_Handle, 0x28, \"invalid stream handle\" ) /* driver errors */ FT_ERRORDEF_( Too_Many_Drivers, 0x30, \"too many modules\" ) FT_ERRORDEF_( Too_Many_Extensions, 0x31, \"too many extensions\" ) /* memory errors */ FT_ERRORDEF_( Out_Of_Memory, 0x40, \"out of memory\" ) FT_ERRORDEF_( Unlisted_Object, 0x41, \"unlisted object\" ) /* stream errors */ FT_ERRORDEF_( Cannot_Open_Stream, 0x51, \"cannot open stream\" ) FT_ERRORDEF_( Invalid_Stream_Seek, 0x52, \"invalid stream seek\" ) FT_ERRORDEF_( Invalid_Stream_Skip, 0x53, \"invalid stream skip\" ) FT_ERRORDEF_( Invalid_Stream_Read, 0x54, \"invalid stream read\" ) FT_ERRORDEF_( Invalid_Stream_Operation, 0x55, \"invalid stream operation\" ) FT_ERRORDEF_( Invalid_Frame_Operation, 0x56, \"invalid frame operation\" ) FT_ERRORDEF_( Nested_Frame_Access, 0x57, \"nested frame access\" ) FT_ERRORDEF_( Invalid_Frame_Read, 0x58, \"invalid frame read\" ) /* raster errors */ FT_ERRORDEF_( Raster_Uninitialized, 0x60, \"raster uninitialized\" ) FT_ERRORDEF_( Raster_Corrupted, 0x61, \"raster corrupted\" ) FT_ERRORDEF_( Raster_Overflow, 0x62, \"raster overflow\" ) FT_ERRORDEF_( Raster_Negative_Height, 0x63, \"negative height while rastering\" ) /* cache errors */ FT_ERRORDEF_( Too_Many_Caches, 0x70, \"too many registered caches\" ) /* TrueType and SFNT errors */ FT_ERRORDEF_( Invalid_Opcode, 0x80, \"invalid opcode\" ) FT_ERRORDEF_( Too_Few_Arguments, 0x81, \"too few arguments\" ) FT_ERRORDEF_( Stack_Overflow, 0x82, \"stack overflow\" ) FT_ERRORDEF_( Code_Overflow, 0x83, \"code overflow\" ) FT_ERRORDEF_( Bad_Argument, 0x84, \"bad argument\" ) FT_ERRORDEF_( Divide_By_Zero, 0x85, \"division by zero\" ) FT_ERRORDEF_( Invalid_Reference, 0x86, \"invalid reference\" ) FT_ERRORDEF_( Debug_OpCode, 0x87, \"found debug opcode\" ) FT_ERRORDEF_( ENDF_In_Exec_Stream, 0x88, \"found ENDF opcode in execution stream\" ) FT_ERRORDEF_( Nested_DEFS, 0x89, \"nested DEFS\" ) FT_ERRORDEF_( Invalid_CodeRange, 0x8A, \"invalid code range\" ) FT_ERRORDEF_( Execution_Too_Long, 0x8B, \"execution context too long \" ) FT_ERRORDEF_( Too_Many_Function_Defs, 0x8C, \"too many function definitions\" ) FT_ERRORDEF_( Too_Many_Instruction_Defs, 0x8D, \"too many instruction definitions\" ) FT_ERRORDEF_( Table_Missing, 0x8E, \"SFNT font table missing\" ) FT_ERRORDEF_( Horiz_Header_Missing, 0x8F, \"horizontal header (hhea) table missing\" ) FT_ERRORDEF_( Locations_Missing, 0x90, \"locations (loca) table missing\" ) FT_ERRORDEF_( Name_Table_Missing, 0x91, \"name table missing\" ) FT_ERRORDEF_( CMap_Table_Missing, 0x92, \"character map (cmap) table missing\" ) FT_ERRORDEF_( Hmtx_Table_Missing, 0x93, \"horizontal metrics (hmtx) table missing\" ) FT_ERRORDEF_( Post_Table_Missing, 0x94, \"PostScript (post) table missing\" ) FT_ERRORDEF_( Invalid_Horiz_Metrics, 0x95, \"invalid horizontal metrics\" ) FT_ERRORDEF_( Invalid_CharMap_Format, 0x96, \"invalid character map (cmap) format\" ) FT_ERRORDEF_( Invalid_PPem, 0x97, \"invalid ppem value\" ) FT_ERRORDEF_( Invalid_Vert_Metrics, 0x98, \"invalid vertical metrics\" ) FT_ERRORDEF_( Could_Not_Find_Context, 0x99, \"could not find context\" ) FT_ERRORDEF_( Invalid_Post_Table_Format, 0x9A, \"invalid PostScript (post) table format\" ) FT_ERRORDEF_( Invalid_Post_Table, 0x9B, \"invalid PostScript (post) table\" ) FT_ERRORDEF_( DEF_In_Glyf_Bytecode, 0x9C, \"found FDEF or IDEF opcode in glyf bytecode\" ) FT_ERRORDEF_( Missing_Bitmap, 0x9D, \"missing bitmap in strike\" ) /* CFF, CID, and Type 1 errors */ FT_ERRORDEF_( Syntax_Error, 0xA0, \"opcode syntax error\" ) FT_ERRORDEF_( Stack_Underflow, 0xA1, \"argument stack underflow\" ) FT_ERRORDEF_( Ignore, 0xA2, \"ignore\" ) FT_ERRORDEF_( No_Unicode_Glyph_Name, 0xA3, \"no Unicode glyph name found\" ) FT_ERRORDEF_( Glyph_Too_Big, 0xA4, \"glyph too big for hinting\" ) /* BDF errors */ FT_ERRORDEF_( Missing_Startfont_Field, 0xB0, \"`STARTFONT' field missing\" ) FT_ERRORDEF_( Missing_Font_Field, 0xB1, \"`FONT' field missing\" ) FT_ERRORDEF_( Missing_Size_Field, 0xB2, \"`SIZE' field missing\" ) FT_ERRORDEF_( Missing_Fontboundingbox_Field, 0xB3, \"`FONTBOUNDINGBOX' field missing\" ) FT_ERRORDEF_( Missing_Chars_Field, 0xB4, \"`CHARS' field missing\" ) FT_ERRORDEF_( Missing_Startchar_Field, 0xB5, \"`STARTCHAR' field missing\" ) FT_ERRORDEF_( Missing_Encoding_Field, 0xB6, \"`ENCODING' field missing\" ) FT_ERRORDEF_( Missing_Bbx_Field, 0xB7, \"`BBX' field missing\" ) FT_ERRORDEF_( Bbx_Too_Big, 0xB8, \"`BBX' too big\" ) FT_ERRORDEF_( Corrupted_Font_Header, 0xB9, \"Font header corrupted or missing fields\" ) FT_ERRORDEF_( Corrupted_Font_Glyphs, 0xBA, \"Font glyphs corrupted or missing fields\" )","title":"Error Code Values"},{"location":"ft2-error_code_values.html#error-code-values","text":"","title":"Error Code Values"},{"location":"ft2-error_code_values.html#synopsis","text":"The list below is taken verbatim from the file fterrdef.h (loaded automatically by including FT_FREETYPE_H ). The first argument of the FT_ERROR_DEF_ macro is the error label; by default, the prefix FT_Err_ gets added so that you get error names like FT_Err_Cannot_Open_Resource . The second argument is the error code, and the last argument an error string, which is not used by FreeType. Within your application you should only use error names and never its numeric values! The latter might (and actually do) change in forthcoming FreeType versions. Macro FT_NOERRORDEF_ defines FT_Err_Ok , which is always zero. See the Error Enumerations subsection how to automatically generate a list of error strings.","title":"Synopsis"},{"location":"ft2-error_code_values.html#ft_err_xxx","text":"/* generic errors */ FT_NOERRORDEF_( Ok, 0x00, \"no error\" ) FT_ERRORDEF_( Cannot_Open_Resource, 0x01, \"cannot open resource\" ) FT_ERRORDEF_( Unknown_File_Format, 0x02, \"unknown file format\" ) FT_ERRORDEF_( Invalid_File_Format, 0x03, \"broken file\" ) FT_ERRORDEF_( Invalid_Version, 0x04, \"invalid FreeType version\" ) FT_ERRORDEF_( Lower_Module_Version, 0x05, \"module version is too low\" ) FT_ERRORDEF_( Invalid_Argument, 0x06, \"invalid argument\" ) FT_ERRORDEF_( Unimplemented_Feature, 0x07, \"unimplemented feature\" ) FT_ERRORDEF_( Invalid_Table, 0x08, \"broken table\" ) FT_ERRORDEF_( Invalid_Offset, 0x09, \"broken offset within table\" ) FT_ERRORDEF_( Array_Too_Large, 0x0A, \"array allocation size too large\" ) FT_ERRORDEF_( Missing_Module, 0x0B, \"missing module\" ) FT_ERRORDEF_( Missing_Property, 0x0C, \"missing property\" ) /* glyph/character errors */ FT_ERRORDEF_( Invalid_Glyph_Index, 0x10, \"invalid glyph index\" ) FT_ERRORDEF_( Invalid_Character_Code, 0x11, \"invalid character code\" ) FT_ERRORDEF_( Invalid_Glyph_Format, 0x12, \"unsupported glyph image format\" ) FT_ERRORDEF_( Cannot_Render_Glyph, 0x13, \"cannot render this glyph format\" ) FT_ERRORDEF_( Invalid_Outline, 0x14, \"invalid outline\" ) FT_ERRORDEF_( Invalid_Composite, 0x15, \"invalid composite glyph\" ) FT_ERRORDEF_( Too_Many_Hints, 0x16, \"too many hints\" ) FT_ERRORDEF_( Invalid_Pixel_Size, 0x17, \"invalid pixel size\" ) /* handle errors */ FT_ERRORDEF_( Invalid_Handle, 0x20, \"invalid object handle\" ) FT_ERRORDEF_( Invalid_Library_Handle, 0x21, \"invalid library handle\" ) FT_ERRORDEF_( Invalid_Driver_Handle, 0x22, \"invalid module handle\" ) FT_ERRORDEF_( Invalid_Face_Handle, 0x23, \"invalid face handle\" ) FT_ERRORDEF_( Invalid_Size_Handle, 0x24, \"invalid size handle\" ) FT_ERRORDEF_( Invalid_Slot_Handle, 0x25, \"invalid glyph slot handle\" ) FT_ERRORDEF_( Invalid_CharMap_Handle, 0x26, \"invalid charmap handle\" ) FT_ERRORDEF_( Invalid_Cache_Handle, 0x27, \"invalid cache manager handle\" ) FT_ERRORDEF_( Invalid_Stream_Handle, 0x28, \"invalid stream handle\" ) /* driver errors */ FT_ERRORDEF_( Too_Many_Drivers, 0x30, \"too many modules\" ) FT_ERRORDEF_( Too_Many_Extensions, 0x31, \"too many extensions\" ) /* memory errors */ FT_ERRORDEF_( Out_Of_Memory, 0x40, \"out of memory\" ) FT_ERRORDEF_( Unlisted_Object, 0x41, \"unlisted object\" ) /* stream errors */ FT_ERRORDEF_( Cannot_Open_Stream, 0x51, \"cannot open stream\" ) FT_ERRORDEF_( Invalid_Stream_Seek, 0x52, \"invalid stream seek\" ) FT_ERRORDEF_( Invalid_Stream_Skip, 0x53, \"invalid stream skip\" ) FT_ERRORDEF_( Invalid_Stream_Read, 0x54, \"invalid stream read\" ) FT_ERRORDEF_( Invalid_Stream_Operation, 0x55, \"invalid stream operation\" ) FT_ERRORDEF_( Invalid_Frame_Operation, 0x56, \"invalid frame operation\" ) FT_ERRORDEF_( Nested_Frame_Access, 0x57, \"nested frame access\" ) FT_ERRORDEF_( Invalid_Frame_Read, 0x58, \"invalid frame read\" ) /* raster errors */ FT_ERRORDEF_( Raster_Uninitialized, 0x60, \"raster uninitialized\" ) FT_ERRORDEF_( Raster_Corrupted, 0x61, \"raster corrupted\" ) FT_ERRORDEF_( Raster_Overflow, 0x62, \"raster overflow\" ) FT_ERRORDEF_( Raster_Negative_Height, 0x63, \"negative height while rastering\" ) /* cache errors */ FT_ERRORDEF_( Too_Many_Caches, 0x70, \"too many registered caches\" ) /* TrueType and SFNT errors */ FT_ERRORDEF_( Invalid_Opcode, 0x80, \"invalid opcode\" ) FT_ERRORDEF_( Too_Few_Arguments, 0x81, \"too few arguments\" ) FT_ERRORDEF_( Stack_Overflow, 0x82, \"stack overflow\" ) FT_ERRORDEF_( Code_Overflow, 0x83, \"code overflow\" ) FT_ERRORDEF_( Bad_Argument, 0x84, \"bad argument\" ) FT_ERRORDEF_( Divide_By_Zero, 0x85, \"division by zero\" ) FT_ERRORDEF_( Invalid_Reference, 0x86, \"invalid reference\" ) FT_ERRORDEF_( Debug_OpCode, 0x87, \"found debug opcode\" ) FT_ERRORDEF_( ENDF_In_Exec_Stream, 0x88, \"found ENDF opcode in execution stream\" ) FT_ERRORDEF_( Nested_DEFS, 0x89, \"nested DEFS\" ) FT_ERRORDEF_( Invalid_CodeRange, 0x8A, \"invalid code range\" ) FT_ERRORDEF_( Execution_Too_Long, 0x8B, \"execution context too long \" ) FT_ERRORDEF_( Too_Many_Function_Defs, 0x8C, \"too many function definitions\" ) FT_ERRORDEF_( Too_Many_Instruction_Defs, 0x8D, \"too many instruction definitions\" ) FT_ERRORDEF_( Table_Missing, 0x8E, \"SFNT font table missing\" ) FT_ERRORDEF_( Horiz_Header_Missing, 0x8F, \"horizontal header (hhea) table missing\" ) FT_ERRORDEF_( Locations_Missing, 0x90, \"locations (loca) table missing\" ) FT_ERRORDEF_( Name_Table_Missing, 0x91, \"name table missing\" ) FT_ERRORDEF_( CMap_Table_Missing, 0x92, \"character map (cmap) table missing\" ) FT_ERRORDEF_( Hmtx_Table_Missing, 0x93, \"horizontal metrics (hmtx) table missing\" ) FT_ERRORDEF_( Post_Table_Missing, 0x94, \"PostScript (post) table missing\" ) FT_ERRORDEF_( Invalid_Horiz_Metrics, 0x95, \"invalid horizontal metrics\" ) FT_ERRORDEF_( Invalid_CharMap_Format, 0x96, \"invalid character map (cmap) format\" ) FT_ERRORDEF_( Invalid_PPem, 0x97, \"invalid ppem value\" ) FT_ERRORDEF_( Invalid_Vert_Metrics, 0x98, \"invalid vertical metrics\" ) FT_ERRORDEF_( Could_Not_Find_Context, 0x99, \"could not find context\" ) FT_ERRORDEF_( Invalid_Post_Table_Format, 0x9A, \"invalid PostScript (post) table format\" ) FT_ERRORDEF_( Invalid_Post_Table, 0x9B, \"invalid PostScript (post) table\" ) FT_ERRORDEF_( DEF_In_Glyf_Bytecode, 0x9C, \"found FDEF or IDEF opcode in glyf bytecode\" ) FT_ERRORDEF_( Missing_Bitmap, 0x9D, \"missing bitmap in strike\" ) /* CFF, CID, and Type 1 errors */ FT_ERRORDEF_( Syntax_Error, 0xA0, \"opcode syntax error\" ) FT_ERRORDEF_( Stack_Underflow, 0xA1, \"argument stack underflow\" ) FT_ERRORDEF_( Ignore, 0xA2, \"ignore\" ) FT_ERRORDEF_( No_Unicode_Glyph_Name, 0xA3, \"no Unicode glyph name found\" ) FT_ERRORDEF_( Glyph_Too_Big, 0xA4, \"glyph too big for hinting\" ) /* BDF errors */ FT_ERRORDEF_( Missing_Startfont_Field, 0xB0, \"`STARTFONT' field missing\" ) FT_ERRORDEF_( Missing_Font_Field, 0xB1, \"`FONT' field missing\" ) FT_ERRORDEF_( Missing_Size_Field, 0xB2, \"`SIZE' field missing\" ) FT_ERRORDEF_( Missing_Fontboundingbox_Field, 0xB3, \"`FONTBOUNDINGBOX' field missing\" ) FT_ERRORDEF_( Missing_Chars_Field, 0xB4, \"`CHARS' field missing\" ) FT_ERRORDEF_( Missing_Startchar_Field, 0xB5, \"`STARTCHAR' field missing\" ) FT_ERRORDEF_( Missing_Encoding_Field, 0xB6, \"`ENCODING' field missing\" ) FT_ERRORDEF_( Missing_Bbx_Field, 0xB7, \"`BBX' field missing\" ) FT_ERRORDEF_( Bbx_Too_Big, 0xB8, \"`BBX' too big\" ) FT_ERRORDEF_( Corrupted_Font_Header, 0xB9, \"Font header corrupted or missing fields\" ) FT_ERRORDEF_( Corrupted_Font_Glyphs, 0xBA, \"Font glyphs corrupted or missing fields\" )","title":"FT_Err_XXX"},{"location":"ft2-error_enumerations.html","text":"FreeType Docs Error Codes Error Enumerations Error Enumerations Synopsis The header file fterrors.h (which is automatically included by freetype.h defines the handling of FreeType's enumeration constants. It can also be used to generate error message strings with a small macro trick explained below. Error Formats The configuration macro FT_CONFIG_OPTION_USE_MODULE_ERRORS can be defined in ftoption.h in order to make the higher byte indicate the module where the error has happened (this is not compatible with standard builds of FreeType 2, however). See the file ftmoderr.h for more details. Error Message Strings Error definitions are set up with special macros that allow client applications to build a table of error message strings. The strings are not included in a normal build of FreeType 2 to save space (most client applications do not use them). To do so, you have to define the following macros before including this file. FT_ERROR_START_LIST This macro is called before anything else to define the start of the error list. It is followed by several FT_ERROR_DEF calls. FT_ERROR_DEF( e, v, s ) This macro is called to define one single error. e is the error code identifier (e.g., Invalid_Argument ), v is the error's numerical value, and s is the corresponding error string. FT_ERROR_END_LIST This macro ends the list. Additionally, you have to undefine FTERRORS_H_ before #including this file. Here is a simple example. #undef FTERRORS_H_ #define FT_ERRORDEF( e, v, s ) { e, s }, #define FT_ERROR_START_LIST { #define FT_ERROR_END_LIST { 0, NULL } }; const struct { int err_code; const char* err_msg; } ft_errors[] = #include FT_ERRORS_H An alternative to using an array is a switch statement. #undef FTERRORS_H_ #define FT_ERROR_START_LIST switch ( error_code ) { #define FT_ERRORDEF( e, v, s ) case v: return s; #define FT_ERROR_END_LIST } If you use FT_CONFIG_OPTION_USE_MODULE_ERRORS , error_code should be replaced with FT_ERROR_BASE(error_code) in the last example. FT_Error_String Defined in FT_ERRORS_H (freetype/fterrors.h). FT_EXPORT( const char * ) FT_Error_String ( FT_Error error_code ); # endif /* FT_ERR_PROTOS_DEFINED */ # endif /* FT_INCLUDE_ERR_PROTOS */ # endif /* !(FTERRORS_H_ __FTERRORS_H__) */ /* END */ Retrieve the description of a valid FreeType error code. input error_code A valid FreeType error code. return A C string or NULL , if any error occurred. note FreeType has to be compiled with FT_CONFIG_OPTION_ERROR_STRINGS or FT_DEBUG_LEVEL_ERROR to get meaningful descriptions. error_string will be NULL otherwise. Module identification will be ignored: strcmp ( FT_Error_String ( FT_Err_Unknown_File_Format ), FT_Error_String ( BDF_Err_Unknown_File_Format ) ) == 0 ;","title":"Error Enumerations"},{"location":"ft2-error_enumerations.html#error-enumerations","text":"","title":"Error Enumerations"},{"location":"ft2-error_enumerations.html#synopsis","text":"The header file fterrors.h (which is automatically included by freetype.h defines the handling of FreeType's enumeration constants. It can also be used to generate error message strings with a small macro trick explained below. Error Formats The configuration macro FT_CONFIG_OPTION_USE_MODULE_ERRORS can be defined in ftoption.h in order to make the higher byte indicate the module where the error has happened (this is not compatible with standard builds of FreeType 2, however). See the file ftmoderr.h for more details. Error Message Strings Error definitions are set up with special macros that allow client applications to build a table of error message strings. The strings are not included in a normal build of FreeType 2 to save space (most client applications do not use them). To do so, you have to define the following macros before including this file. FT_ERROR_START_LIST This macro is called before anything else to define the start of the error list. It is followed by several FT_ERROR_DEF calls. FT_ERROR_DEF( e, v, s ) This macro is called to define one single error. e is the error code identifier (e.g., Invalid_Argument ), v is the error's numerical value, and s is the corresponding error string. FT_ERROR_END_LIST This macro ends the list. Additionally, you have to undefine FTERRORS_H_ before #including this file. Here is a simple example. #undef FTERRORS_H_ #define FT_ERRORDEF( e, v, s ) { e, s }, #define FT_ERROR_START_LIST { #define FT_ERROR_END_LIST { 0, NULL } }; const struct { int err_code; const char* err_msg; } ft_errors[] = #include FT_ERRORS_H An alternative to using an array is a switch statement. #undef FTERRORS_H_ #define FT_ERROR_START_LIST switch ( error_code ) { #define FT_ERRORDEF( e, v, s ) case v: return s; #define FT_ERROR_END_LIST } If you use FT_CONFIG_OPTION_USE_MODULE_ERRORS , error_code should be replaced with FT_ERROR_BASE(error_code) in the last example.","title":"Synopsis"},{"location":"ft2-error_enumerations.html#ft_error_string","text":"Defined in FT_ERRORS_H (freetype/fterrors.h). FT_EXPORT( const char * ) FT_Error_String ( FT_Error error_code ); # endif /* FT_ERR_PROTOS_DEFINED */ # endif /* FT_INCLUDE_ERR_PROTOS */ # endif /* !(FTERRORS_H_ __FTERRORS_H__) */ /* END */ Retrieve the description of a valid FreeType error code.","title":"FT_Error_String"},{"location":"ft2-font_formats.html","text":"FreeType Docs Format-Specific API Font Formats Font Formats Synopsis The single function in this section can be used to get the font format. Note that this information is not needed normally; however, there are special cases (like in PDF devices) where it is important to differentiate, in spite of FreeType's uniform API. FT_Get_Font_Format Defined in FT_FONT_FORMATS_H (freetype/ftfntfmt.h). FT_EXPORT( const char * ) FT_Get_Font_Format ( FT_Face face ); /* deprecated */ FT_EXPORT( const char * ) FT_Get_X11_Font_Format( FT_Face face ); Return a string describing the format of a given face. Possible values are TrueType , Type 1 , BDF , PCF , Type 42 , CID Type 1 , CFF , PFR , and Windows FNT . The return value is suitable to be used as an X11 FONT_PROPERTY. input face Input face handle. return Font format string. NULL in case of error. note A deprecated name for the same function is FT_Get_X11_Font_Format .","title":"Font Formats"},{"location":"ft2-font_formats.html#font-formats","text":"","title":"Font Formats"},{"location":"ft2-font_formats.html#synopsis","text":"The single function in this section can be used to get the font format. Note that this information is not needed normally; however, there are special cases (like in PDF devices) where it is important to differentiate, in spite of FreeType's uniform API.","title":"Synopsis"},{"location":"ft2-font_formats.html#ft_get_font_format","text":"Defined in FT_FONT_FORMATS_H (freetype/ftfntfmt.h). FT_EXPORT( const char * ) FT_Get_Font_Format ( FT_Face face ); /* deprecated */ FT_EXPORT( const char * ) FT_Get_X11_Font_Format( FT_Face face ); Return a string describing the format of a given face. Possible values are TrueType , Type 1 , BDF , PCF , Type 42 , CID Type 1 , CFF , PFR , and Windows FNT . The return value is suitable to be used as an X11 FONT_PROPERTY.","title":"FT_Get_Font_Format"},{"location":"ft2-gasp_table.html","text":"FreeType Docs Format-Specific API Gasp Table Gasp Table Synopsis The function FT_Get_Gasp can be used to query a TrueType or OpenType font for specific entries in its gasp table, if any. This is mainly useful when implementing native TrueType hinting with the bytecode interpreter to duplicate the Windows text rendering results. FT_GASP_XXX Defined in FT_GASP_H (freetype/ftgasp.h). # define FT_GASP_NO_TABLE -1 # define FT_GASP_DO_GRIDFIT 0x01 # define FT_GASP_DO_GRAY 0x02 # define FT_GASP_SYMMETRIC_GRIDFIT 0x04 # define FT_GASP_SYMMETRIC_SMOOTHING 0x08 A list of values and/or bit-flags returned by the FT_Get_Gasp function. values FT_GASP_NO_TABLE This special value means that there is no GASP table in this face. It is up to the client to decide what to do. FT_GASP_DO_GRIDFIT Grid-fitting and hinting should be performed at the specified ppem. This really means TrueType bytecode interpretation. If this bit is not set, no hinting gets applied. FT_GASP_DO_GRAY Anti-aliased rendering should be performed at the specified ppem. If not set, do monochrome rendering. FT_GASP_SYMMETRIC_SMOOTHING If set, smoothing along multiple axes must be used with ClearType. FT_GASP_SYMMETRIC_GRIDFIT Grid-fitting must be used with ClearType's symmetric smoothing. note The bit-flags FT_GASP_DO_GRIDFIT and FT_GASP_DO_GRAY are to be used for standard font rasterization only. Independently of that, FT_GASP_SYMMETRIC_SMOOTHING and FT_GASP_SYMMETRIC_GRIDFIT are to be used if ClearType is enabled (and FT_GASP_DO_GRIDFIT and FT_GASP_DO_GRAY are consequently ignored). ClearType is Microsoft's implementation of LCD rendering, partly protected by patents. since 2.3.0 FT_Get_Gasp Defined in FT_GASP_H (freetype/ftgasp.h). FT_EXPORT( FT_Int ) FT_Get_Gasp ( FT_Face face, FT_UInt ppem ); For a TrueType or OpenType font file, return the rasterizer behaviour flags from the font's gasp table corresponding to a given character pixel size. input face The source face handle. ppem The vertical character pixel size. return Bit flags (see FT_GASP_XXX ), or FT_GASP_NO_TABLE if there is no gasp table in the face. note If you want to use the MM functionality of OpenType variation fonts (i.e., using FT_Set_Var_Design_Coordinates and friends), call this function after setting an instance since the return values can change. since 2.3.0","title":"Gasp Table"},{"location":"ft2-gasp_table.html#gasp-table","text":"","title":"Gasp Table"},{"location":"ft2-gasp_table.html#synopsis","text":"The function FT_Get_Gasp can be used to query a TrueType or OpenType font for specific entries in its gasp table, if any. This is mainly useful when implementing native TrueType hinting with the bytecode interpreter to duplicate the Windows text rendering results.","title":"Synopsis"},{"location":"ft2-gasp_table.html#ft_gasp_xxx","text":"Defined in FT_GASP_H (freetype/ftgasp.h). # define FT_GASP_NO_TABLE -1 # define FT_GASP_DO_GRIDFIT 0x01 # define FT_GASP_DO_GRAY 0x02 # define FT_GASP_SYMMETRIC_GRIDFIT 0x04 # define FT_GASP_SYMMETRIC_SMOOTHING 0x08 A list of values and/or bit-flags returned by the FT_Get_Gasp function.","title":"FT_GASP_XXX"},{"location":"ft2-gasp_table.html#ft_get_gasp","text":"Defined in FT_GASP_H (freetype/ftgasp.h). FT_EXPORT( FT_Int ) FT_Get_Gasp ( FT_Face face, FT_UInt ppem ); For a TrueType or OpenType font file, return the rasterizer behaviour flags from the font's gasp table corresponding to a given character pixel size.","title":"FT_Get_Gasp"},{"location":"ft2-glyph_management.html","text":"FreeType Docs Core API Glyph Management Glyph Management Synopsis This section contains definitions used to manage glyph data through generic FT_Glyph objects. Each of them can contain a bitmap, a vector outline, or even images in other formats. These objects are detached from FT_Face , contrary to FT_GlyphSlot . FT_Glyph Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_GlyphRec_* FT_Glyph ; Handle to an object used to model generic glyph images. It is a pointer to the FT_GlyphRec structure and can contain a glyph bitmap or pointer. note Glyph objects are not owned by the library. You must thus release them manually (through FT_Done_Glyph ) before calling FT_Done_FreeType . FT_GlyphRec Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_GlyphRec_ { FT_Library library; const FT_Glyph_Class* clazz; FT_Glyph_Format format; FT_Vector advance; } FT_GlyphRec ; The root glyph structure contains a given glyph image plus its advance width in 16.16 fixed-point format. fields library A handle to the FreeType library object. clazz A pointer to the glyph's class. Private. format The format of the glyph's image. advance A 16.16 vector that gives the glyph's advance width. FT_BitmapGlyph Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_BitmapGlyphRec_* FT_BitmapGlyph ; A handle to an object used to model a bitmap glyph image. This is a sub-class of FT_Glyph , and a pointer to FT_BitmapGlyphRec . FT_BitmapGlyphRec Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_BitmapGlyphRec_ { FT_GlyphRec root; FT_Int left; FT_Int top; FT_Bitmap bitmap; } FT_BitmapGlyphRec ; A structure used for bitmap glyph images. This really is a sub-class of FT_GlyphRec . fields root The root FT_Glyph fields. left The left-side bearing, i.e., the horizontal distance from the current pen position to the left border of the glyph bitmap. top The top-side bearing, i.e., the vertical distance from the current pen position to the top border of the glyph bitmap. This distance is positive for upwards y! bitmap A descriptor for the bitmap. note You can typecast an FT_Glyph to FT_BitmapGlyph if you have glyph- format == FT_GLYPH_FORMAT_BITMAP . This lets you access the bitmap's contents easily. The corresponding pixel buffer is always owned by FT_BitmapGlyph and is thus created and destroyed with it. FT_OutlineGlyph Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_OutlineGlyphRec_* FT_OutlineGlyph ; A handle to an object used to model an outline glyph image. This is a sub-class of FT_Glyph , and a pointer to FT_OutlineGlyphRec . FT_OutlineGlyphRec Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_OutlineGlyphRec_ { FT_GlyphRec root; FT_Outline outline; } FT_OutlineGlyphRec ; A structure used for outline (vectorial) glyph images. This really is a sub-class of FT_GlyphRec . fields root The root FT_Glyph fields. outline A descriptor for the outline. note You can typecast an FT_Glyph to FT_OutlineGlyph if you have glyph- format == FT_GLYPH_FORMAT_OUTLINE . This lets you access the outline's content easily. As the outline is extracted from a glyph slot, its coordinates are expressed normally in 26.6 pixels, unless the flag FT_LOAD_NO_SCALE was used in FT_Load_Glyph () or FT_Load_Char (). The outline's tables are always owned by the object and are destroyed with it. FT_New_Glyph Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_New_Glyph ( FT_Library library, FT_Glyph_Format format, FT_Glyph *aglyph ); A function used to create a new empty glyph image. Note that the created FT_Glyph object must be released with FT_Done_Glyph . input library A handle to the FreeType library object. format The format of the glyph's image. output aglyph A handle to the glyph object. return FreeType error code. 0 means success. since 2.10 FT_Get_Glyph Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Get_Glyph ( FT_GlyphSlot slot, FT_Glyph *aglyph ); A function used to extract a glyph image from a slot. Note that the created FT_Glyph object must be released with FT_Done_Glyph . input slot A handle to the source glyph slot. output aglyph A handle to the glyph object. return FreeType error code. 0 means success. note Because *aglyph- advance.x and *aglyph- advance.y are 16.16 fixed-point numbers, slot- advance.x and slot- advance.y (which are in 26.6 fixed-point format) must be in the range ]-32768;32768[. FT_Glyph_Copy Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Glyph_Copy ( FT_Glyph source, FT_Glyph *target ); A function used to copy a glyph image. Note that the created FT_Glyph object must be released with FT_Done_Glyph . input source A handle to the source glyph object. output target A handle to the target glyph object. 0 in case of error. return FreeType error code. 0 means success. FT_Glyph_Transform Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Glyph_Transform ( FT_Glyph glyph, FT_Matrix * matrix, FT_Vector * delta ); Transform a glyph image if its format is scalable. inout glyph A handle to the target glyph object. input matrix A pointer to a 2x2 matrix to apply. delta A pointer to a 2d vector to apply. Coordinates are expressed in 1/64th of a pixel. return FreeType error code (if not 0, the glyph format is not scalable). note The 2x2 transformation matrix is also applied to the glyph's advance vector. FT_Glyph_BBox_Mode Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef enum FT_Glyph_BBox_Mode_ { FT_GLYPH_BBOX_UNSCALED = 0, FT_GLYPH_BBOX_SUBPIXELS = 0, FT_GLYPH_BBOX_GRIDFIT = 1, FT_GLYPH_BBOX_TRUNCATE = 2, FT_GLYPH_BBOX_PIXELS = 3 } FT_Glyph_BBox_Mode ; /* these constants are deprecated; use the corresponding */ /* ` FT_Glyph_BBox_Mode ` values instead */ # define ft_glyph_bbox_unscaled FT_GLYPH_BBOX_UNSCALED # define ft_glyph_bbox_subpixels FT_GLYPH_BBOX_SUBPIXELS # define ft_glyph_bbox_gridfit FT_GLYPH_BBOX_GRIDFIT # define ft_glyph_bbox_truncate FT_GLYPH_BBOX_TRUNCATE # define ft_glyph_bbox_pixels FT_GLYPH_BBOX_PIXELS The mode how the values of FT_Glyph_Get_CBox are returned. values FT_GLYPH_BBOX_UNSCALED Return unscaled font units. FT_GLYPH_BBOX_SUBPIXELS Return unfitted 26.6 coordinates. FT_GLYPH_BBOX_GRIDFIT Return grid-fitted 26.6 coordinates. FT_GLYPH_BBOX_TRUNCATE Return coordinates in integer pixels. FT_GLYPH_BBOX_PIXELS Return grid-fitted pixel coordinates. FT_Glyph_Get_CBox Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( void ) FT_Glyph_Get_CBox ( FT_Glyph glyph, FT_UInt bbox_mode, FT_BBox *acbox ); Return a glyph's control box . The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs). Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the ftbbox component, which is dedicated to this single task. input glyph A handle to the source glyph object. mode The mode that indicates how to interpret the returned bounding box values. output acbox The glyph coordinate bounding box. Coordinates are expressed in 1/64th of pixels if it is grid-fitted. note Coordinates are relative to the glyph origin, using the y upwards convention. If the glyph has been loaded with FT_LOAD_NO_SCALE , bbox_mode must be set to FT_GLYPH_BBOX_UNSCALED to get unscaled font units in 26.6 pixel format. The value FT_GLYPH_BBOX_SUBPIXELS is another name for this constant. If the font is tricky and the glyph has been loaded with FT_LOAD_NO_SCALE , the resulting CBox is meaningless. To get reasonable values for the CBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the CBox, which can be eventually converted back to font units. Note that the maximum coordinates are exclusive, which means that one can compute the width and height of the glyph image (be it in integer or 26.6 pixels) as: width = bbox.xMax - bbox.xMin; height = bbox.yMax - bbox.yMin; Note also that for 26.6 coordinates, if bbox_mode is set to FT_GLYPH_BBOX_GRIDFIT , the coordinates will also be grid-fitted, which corresponds to: bbox.xMin = FLOOR(bbox.xMin); bbox.yMin = FLOOR(bbox.yMin); bbox.xMax = CEILING(bbox.xMax); bbox.yMax = CEILING(bbox.yMax); To get the bbox in pixel coordinates, set bbox_mode to FT_GLYPH_BBOX_TRUNCATE . To get the bbox in grid-fitted pixel coordinates, set bbox_mode to FT_GLYPH_BBOX_PIXELS . FT_Glyph_To_Bitmap Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Glyph_To_Bitmap ( FT_Glyph * the_glyph, FT_Render_Mode render_mode, FT_Vector * origin, FT_Bool destroy ); Convert a given glyph object to a bitmap glyph object. inout the_glyph A pointer to a handle to the target glyph. input render_mode An enumeration that describes how the data is rendered. origin A pointer to a vector used to translate the glyph image before rendering. Can be 0 (if no translation). The origin is expressed in 26.6 pixels. destroy A boolean that indicates that the original glyph image should be destroyed by this function. It is never destroyed in case of error. return FreeType error code. 0 means success. note This function does nothing if the glyph format isn't scalable. The glyph image is translated with the origin vector before rendering. The first parameter is a pointer to an FT_Glyph handle, that will be replaced by this function (with newly allocated data). Typically, you would use (omitting error handling): FT_Glyph glyph; FT_BitmapGlyph glyph_bitmap; // load glyph error = FT_Load_Char( face, glyph_index, FT_LOAD_DEFAULT ); // extract glyph image error = FT_Get_Glyph( face- glyph, glyph ); // convert to a bitmap (default render mode + destroying old) if ( glyph- format != FT_GLYPH_FORMAT_BITMAP ) { error = FT_Glyph_To_Bitmap( glyph, FT_RENDER_MODE_NORMAL, 0, 1 ); if ( error ) // `glyph unchanged ... } // access bitmap content by typecasting glyph_bitmap = (FT_BitmapGlyph)glyph; // do funny stuff with it, like blitting/drawing ... // discard glyph image (bitmap or not) FT_Done_Glyph( glyph ); Here is another example, again without error handling: FT_Glyph glyphs[MAX_GLYPHS] ... for ( idx = 0; i MAX_GLYPHS; i++ ) error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT ) || FT_Get_Glyph ( face- glyph, glyphs[idx] ); ... for ( idx = 0; i MAX_GLYPHS; i++ ) { FT_Glyph bitmap = glyphs[idx]; ... // after this call, `bitmap no longer points into // the `glyphs array (and the old value isn t destroyed) FT_Glyph_To_Bitmap( bitmap, FT_RENDER_MODE_MONO, 0, 0 ); ... FT_Done_Glyph( bitmap ); } ... for ( idx = 0; i MAX_GLYPHS; i++ ) FT_Done_Glyph( glyphs[idx] ); FT_Done_Glyph Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( void ) FT_Done_Glyph ( FT_Glyph glyph ); Destroy a given glyph. input glyph A handle to the target glyph object.","title":"Glyph Management"},{"location":"ft2-glyph_management.html#glyph-management","text":"","title":"Glyph Management"},{"location":"ft2-glyph_management.html#synopsis","text":"This section contains definitions used to manage glyph data through generic FT_Glyph objects. Each of them can contain a bitmap, a vector outline, or even images in other formats. These objects are detached from FT_Face , contrary to FT_GlyphSlot .","title":"Synopsis"},{"location":"ft2-glyph_management.html#ft_glyph","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_GlyphRec_* FT_Glyph ; Handle to an object used to model generic glyph images. It is a pointer to the FT_GlyphRec structure and can contain a glyph bitmap or pointer.","title":"FT_Glyph"},{"location":"ft2-glyph_management.html#ft_glyphrec","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_GlyphRec_ { FT_Library library; const FT_Glyph_Class* clazz; FT_Glyph_Format format; FT_Vector advance; } FT_GlyphRec ; The root glyph structure contains a given glyph image plus its advance width in 16.16 fixed-point format.","title":"FT_GlyphRec"},{"location":"ft2-glyph_management.html#ft_bitmapglyph","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_BitmapGlyphRec_* FT_BitmapGlyph ; A handle to an object used to model a bitmap glyph image. This is a sub-class of FT_Glyph , and a pointer to FT_BitmapGlyphRec .","title":"FT_BitmapGlyph"},{"location":"ft2-glyph_management.html#ft_bitmapglyphrec","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_BitmapGlyphRec_ { FT_GlyphRec root; FT_Int left; FT_Int top; FT_Bitmap bitmap; } FT_BitmapGlyphRec ; A structure used for bitmap glyph images. This really is a sub-class of FT_GlyphRec .","title":"FT_BitmapGlyphRec"},{"location":"ft2-glyph_management.html#ft_outlineglyph","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_OutlineGlyphRec_* FT_OutlineGlyph ; A handle to an object used to model an outline glyph image. This is a sub-class of FT_Glyph , and a pointer to FT_OutlineGlyphRec .","title":"FT_OutlineGlyph"},{"location":"ft2-glyph_management.html#ft_outlineglyphrec","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef struct FT_OutlineGlyphRec_ { FT_GlyphRec root; FT_Outline outline; } FT_OutlineGlyphRec ; A structure used for outline (vectorial) glyph images. This really is a sub-class of FT_GlyphRec .","title":"FT_OutlineGlyphRec"},{"location":"ft2-glyph_management.html#ft_new_glyph","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_New_Glyph ( FT_Library library, FT_Glyph_Format format, FT_Glyph *aglyph ); A function used to create a new empty glyph image. Note that the created FT_Glyph object must be released with FT_Done_Glyph .","title":"FT_New_Glyph"},{"location":"ft2-glyph_management.html#ft_get_glyph","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Get_Glyph ( FT_GlyphSlot slot, FT_Glyph *aglyph ); A function used to extract a glyph image from a slot. Note that the created FT_Glyph object must be released with FT_Done_Glyph .","title":"FT_Get_Glyph"},{"location":"ft2-glyph_management.html#ft_glyph_copy","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Glyph_Copy ( FT_Glyph source, FT_Glyph *target ); A function used to copy a glyph image. Note that the created FT_Glyph object must be released with FT_Done_Glyph .","title":"FT_Glyph_Copy"},{"location":"ft2-glyph_management.html#ft_glyph_transform","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Glyph_Transform ( FT_Glyph glyph, FT_Matrix * matrix, FT_Vector * delta ); Transform a glyph image if its format is scalable.","title":"FT_Glyph_Transform"},{"location":"ft2-glyph_management.html#ft_glyph_bbox_mode","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). typedef enum FT_Glyph_BBox_Mode_ { FT_GLYPH_BBOX_UNSCALED = 0, FT_GLYPH_BBOX_SUBPIXELS = 0, FT_GLYPH_BBOX_GRIDFIT = 1, FT_GLYPH_BBOX_TRUNCATE = 2, FT_GLYPH_BBOX_PIXELS = 3 } FT_Glyph_BBox_Mode ; /* these constants are deprecated; use the corresponding */ /* ` FT_Glyph_BBox_Mode ` values instead */ # define ft_glyph_bbox_unscaled FT_GLYPH_BBOX_UNSCALED # define ft_glyph_bbox_subpixels FT_GLYPH_BBOX_SUBPIXELS # define ft_glyph_bbox_gridfit FT_GLYPH_BBOX_GRIDFIT # define ft_glyph_bbox_truncate FT_GLYPH_BBOX_TRUNCATE # define ft_glyph_bbox_pixels FT_GLYPH_BBOX_PIXELS The mode how the values of FT_Glyph_Get_CBox are returned.","title":"FT_Glyph_BBox_Mode"},{"location":"ft2-glyph_management.html#ft_glyph_get_cbox","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( void ) FT_Glyph_Get_CBox ( FT_Glyph glyph, FT_UInt bbox_mode, FT_BBox *acbox ); Return a glyph's control box . The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs). Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the ftbbox component, which is dedicated to this single task.","title":"FT_Glyph_Get_CBox"},{"location":"ft2-glyph_management.html#ft_glyph_to_bitmap","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( FT_Error ) FT_Glyph_To_Bitmap ( FT_Glyph * the_glyph, FT_Render_Mode render_mode, FT_Vector * origin, FT_Bool destroy ); Convert a given glyph object to a bitmap glyph object.","title":"FT_Glyph_To_Bitmap"},{"location":"ft2-glyph_management.html#ft_done_glyph","text":"Defined in FT_GLYPH_H (freetype/ftglyph.h). FT_EXPORT( void ) FT_Done_Glyph ( FT_Glyph glyph ); Destroy a given glyph.","title":"FT_Done_Glyph"},{"location":"ft2-glyph_stroker.html","text":"FreeType Docs Support API Glyph Stroker Glyph Stroker Synopsis This component generates stroked outlines of a given vectorial glyph. It also allows you to retrieve the outside and/or the inside borders of the stroke. This can be useful to generate bordered glyph, i.e., glyphs displayed with a coloured (and anti-aliased) border around their shape. FT_Stroker Defined in FT_STROKER_H (freetype/ftstroke.h). typedef struct FT_StrokerRec_* FT_Stroker ; Opaque handle to a path stroker object. FT_Stroker_LineJoin Defined in FT_STROKER_H (freetype/ftstroke.h). typedef enum FT_Stroker_LineJoin_ { FT_STROKER_LINEJOIN_ROUND = 0, FT_STROKER_LINEJOIN_BEVEL = 1, FT_STROKER_LINEJOIN_MITER_VARIABLE = 2, FT_STROKER_LINEJOIN_MITER = FT_STROKER_LINEJOIN_MITER_VARIABLE , FT_STROKER_LINEJOIN_MITER_FIXED = 3 } FT_Stroker_LineJoin ; These values determine how two joining lines are rendered in a stroker. values FT_STROKER_LINEJOIN_ROUND Used to render rounded line joins. Circular arcs are used to join two lines smoothly. FT_STROKER_LINEJOIN_BEVEL Used to render beveled line joins. The outer corner of the joined lines is filled by enclosing the triangular region of the corner with a straight line between the outer corners of each stroke. FT_STROKER_LINEJOIN_MITER_FIXED Used to render mitered line joins, with fixed bevels if the miter limit is exceeded. The outer edges of the strokes for the two segments are extended until they meet at an angle. If the segments meet at too sharp an angle (such that the miter would extend from the intersection of the segments a distance greater than the product of the miter limit value and the border radius), then a bevel join (see above) is used instead. This prevents long spikes being created. FT_STROKER_LINEJOIN_MITER_FIXED generates a miter line join as used in PostScript and PDF. FT_STROKER_LINEJOIN_MITER_VARIABLE FT_STROKER_LINEJOIN_MITER Used to render mitered line joins, with variable bevels if the miter limit is exceeded. The intersection of the strokes is clipped at a line perpendicular to the bisector of the angle between the strokes, at the distance from the intersection of the segments equal to the product of the miter limit value and the border radius. This prevents long spikes being created. FT_STROKER_LINEJOIN_MITER_VARIABLE generates a mitered line join as used in XPS. FT_STROKER_LINEJOIN_MITER is an alias for FT_STROKER_LINEJOIN_MITER_VARIABLE , retained for backward compatibility. FT_Stroker_LineCap Defined in FT_STROKER_H (freetype/ftstroke.h). typedef enum FT_Stroker_LineCap_ { FT_STROKER_LINECAP_BUTT = 0, FT_STROKER_LINECAP_ROUND , FT_STROKER_LINECAP_SQUARE } FT_Stroker_LineCap ; These values determine how the end of opened sub-paths are rendered in a stroke. values FT_STROKER_LINECAP_BUTT The end of lines is rendered as a full stop on the last point itself. FT_STROKER_LINECAP_ROUND The end of lines is rendered as a half-circle around the last point. FT_STROKER_LINECAP_SQUARE The end of lines is rendered as a square around the last point. FT_StrokerBorder Defined in FT_STROKER_H (freetype/ftstroke.h). typedef enum FT_StrokerBorder_ { FT_STROKER_BORDER_LEFT = 0, FT_STROKER_BORDER_RIGHT } FT_StrokerBorder ; These values are used to select a given stroke border in FT_Stroker_GetBorderCounts and FT_Stroker_ExportBorder . values FT_STROKER_BORDER_LEFT Select the left border, relative to the drawing direction. FT_STROKER_BORDER_RIGHT Select the right border, relative to the drawing direction. note Applications are generally interested in the inside and outside borders. However, there is no direct mapping between these and the left and right ones, since this really depends on the glyph's drawing orientation, which varies between font formats. You can however use FT_Outline_GetInsideBorder and FT_Outline_GetOutsideBorder to get these. FT_Outline_GetInsideBorder Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_StrokerBorder ) FT_Outline_GetInsideBorder ( FT_Outline * outline ); Retrieve the FT_StrokerBorder value corresponding to the inside borders of a given outline. input outline The source outline handle. return The border index. FT_STROKER_BORDER_RIGHT for empty or invalid outlines. FT_Outline_GetOutsideBorder Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_StrokerBorder ) FT_Outline_GetOutsideBorder ( FT_Outline * outline ); Retrieve the FT_StrokerBorder value corresponding to the outside borders of a given outline. input outline The source outline handle. return The border index. FT_STROKER_BORDER_LEFT for empty or invalid outlines. FT_Glyph_Stroke Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Glyph_Stroke ( FT_Glyph *pglyph, FT_Stroker stroker, FT_Bool destroy ); Stroke a given outline glyph object with a given stroker. inout pglyph Source glyph handle on input, new glyph handle on output. input stroker A stroker handle. destroy A Boolean. If 1, the source glyph object is destroyed on success. return FreeType error code. 0 means success. note The source glyph is untouched in case of error. Adding stroke may yield a significantly wider and taller glyph depending on how large of a radius was used to stroke the glyph. You may need to manually adjust horizontal and vertical advance amounts to account for this added size. FT_Glyph_StrokeBorder Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Glyph_StrokeBorder ( FT_Glyph *pglyph, FT_Stroker stroker, FT_Bool inside, FT_Bool destroy ); Stroke a given outline glyph object with a given stroker, but only return either its inside or outside border. inout pglyph Source glyph handle on input, new glyph handle on output. input stroker A stroker handle. inside A Boolean. If 1, return the inside border, otherwise the outside border. destroy A Boolean. If 1, the source glyph object is destroyed on success. return FreeType error code. 0 means success. note The source glyph is untouched in case of error. Adding stroke may yield a significantly wider and taller glyph depending on how large of a radius was used to stroke the glyph. You may need to manually adjust horizontal and vertical advance amounts to account for this added size. FT_Stroker_New Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_New ( FT_Library library, FT_Stroker *astroker ); Create a new stroker object. input library FreeType library handle. output astroker A new stroker object handle. NULL in case of error. return FreeType error code. 0 means success. FT_Stroker_Set Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Set ( FT_Stroker stroker, FT_Fixed radius, FT_Stroker_LineCap line_cap, FT_Stroker_LineJoin line_join, FT_Fixed miter_limit ); Reset a stroker object's attributes. input stroker The target stroker handle. radius The border radius. line_cap The line cap style. line_join The line join style. miter_limit The miter limit for the FT_STROKER_LINEJOIN_MITER_FIXED and FT_STROKER_LINEJOIN_MITER_VARIABLE line join styles, expressed as 16.16 fixed-point value. note The radius is expressed in the same units as the outline coordinates. This function calls FT_Stroker_Rewind automatically. FT_Stroker_Rewind Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Rewind ( FT_Stroker stroker ); Reset a stroker object without changing its attributes. You should call this function before beginning a new series of calls to FT_Stroker_BeginSubPath or FT_Stroker_EndSubPath . input stroker The target stroker handle. FT_Stroker_ParseOutline Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_ParseOutline ( FT_Stroker stroker, FT_Outline * outline, FT_Bool opened ); A convenience function used to parse a whole outline with the stroker. The resulting outline(s) can be retrieved later by functions like FT_Stroker_GetCounts and FT_Stroker_Export . input stroker The target stroker handle. outline The source outline. opened A boolean. If 1, the outline is treated as an open path instead of a closed one. return FreeType error code. 0 means success. note If opened is 0 (the default), the outline is treated as a closed path, and the stroker generates two distinct border outlines. If opened is 1, the outline is processed as an open path, and the stroker generates a single stroke outline. This function calls FT_Stroker_Rewind automatically. FT_Stroker_Done Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Done ( FT_Stroker stroker ); Destroy a stroker object. input stroker A stroker handle. Can be NULL . FT_Stroker_BeginSubPath Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_BeginSubPath ( FT_Stroker stroker, FT_Vector * to, FT_Bool open ); Start a new sub-path in the stroker. input stroker The target stroker handle. to A pointer to the start vector. open A boolean. If 1, the sub-path is treated as an open one. return FreeType error code. 0 means success. note This function is useful when you need to stroke a path that is not stored as an FT_Outline object. FT_Stroker_EndSubPath Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_EndSubPath ( FT_Stroker stroker ); Close the current sub-path in the stroker. input stroker The target stroker handle. return FreeType error code. 0 means success. note You should call this function after FT_Stroker_BeginSubPath . If the subpath was not opened , this function draws a single line segment to the start position when needed. FT_Stroker_LineTo Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_LineTo ( FT_Stroker stroker, FT_Vector * to ); Draw a single line segment in the stroker's current sub-path, from the last position. input stroker The target stroker handle. to A pointer to the destination point. return FreeType error code. 0 means success. note You should call this function between FT_Stroker_BeginSubPath and FT_Stroker_EndSubPath . FT_Stroker_ConicTo Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_ConicTo ( FT_Stroker stroker, FT_Vector * control, FT_Vector * to ); Draw a single quadratic Bezier in the stroker's current sub-path, from the last position. input stroker The target stroker handle. control A pointer to a Bezier control point. to A pointer to the destination point. return FreeType error code. 0 means success. note You should call this function between FT_Stroker_BeginSubPath and FT_Stroker_EndSubPath . FT_Stroker_CubicTo Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_CubicTo ( FT_Stroker stroker, FT_Vector * control1, FT_Vector * control2, FT_Vector * to ); Draw a single cubic Bezier in the stroker's current sub-path, from the last position. input stroker The target stroker handle. control1 A pointer to the first Bezier control point. control2 A pointer to second Bezier control point. to A pointer to the destination point. return FreeType error code. 0 means success. note You should call this function between FT_Stroker_BeginSubPath and FT_Stroker_EndSubPath . FT_Stroker_GetBorderCounts Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_GetBorderCounts ( FT_Stroker stroker, FT_StrokerBorder border, FT_UInt *anum_points, FT_UInt *anum_contours ); Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export one of the border or stroke outlines generated by the stroker. input stroker The target stroker handle. border The border index. output anum_points The number of points. anum_contours The number of contours. return FreeType error code. 0 means success. note When an outline, or a sub-path, is closed , the stroker generates two independent border outlines, named left and right . When the outline, or a sub-path, is opened , the stroker merges the border outlines with caps. The left border receives all points, while the right border becomes empty. Use the function FT_Stroker_GetCounts instead if you want to retrieve the counts associated to both borders. FT_Stroker_ExportBorder Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_ExportBorder ( FT_Stroker stroker, FT_StrokerBorder border, FT_Outline * outline ); Call this function after FT_Stroker_GetBorderCounts to export the corresponding border to your own FT_Outline structure. Note that this function appends the border points and contours to your outline, but does not try to resize its arrays. input stroker The target stroker handle. border The border index. outline The target outline handle. note Always call this function after FT_Stroker_GetBorderCounts to get sure that there is enough room in your FT_Outline object to receive all new data. When an outline, or a sub-path, is closed , the stroker generates two independent border outlines, named left and right . When the outline, or a sub-path, is opened , the stroker merges the border outlines with caps. The left border receives all points, while the right border becomes empty. Use the function FT_Stroker_Export instead if you want to retrieve all borders at once. FT_Stroker_GetCounts Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_GetCounts ( FT_Stroker stroker, FT_UInt *anum_points, FT_UInt *anum_contours ); Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export all points/borders from the stroked outline/path. input stroker The target stroker handle. output anum_points The number of points. anum_contours The number of contours. return FreeType error code. 0 means success. FT_Stroker_Export Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Export ( FT_Stroker stroker, FT_Outline * outline ); Call this function after FT_Stroker_GetBorderCounts to export all borders to your own FT_Outline structure. Note that this function appends the border points and contours to your outline, but does not try to resize its arrays. input stroker The target stroker handle. outline The target outline handle.","title":"Glyph Stroker"},{"location":"ft2-glyph_stroker.html#glyph-stroker","text":"","title":"Glyph Stroker"},{"location":"ft2-glyph_stroker.html#synopsis","text":"This component generates stroked outlines of a given vectorial glyph. It also allows you to retrieve the outside and/or the inside borders of the stroke. This can be useful to generate bordered glyph, i.e., glyphs displayed with a coloured (and anti-aliased) border around their shape.","title":"Synopsis"},{"location":"ft2-glyph_stroker.html#ft_stroker","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). typedef struct FT_StrokerRec_* FT_Stroker ; Opaque handle to a path stroker object.","title":"FT_Stroker"},{"location":"ft2-glyph_stroker.html#ft_stroker_linejoin","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). typedef enum FT_Stroker_LineJoin_ { FT_STROKER_LINEJOIN_ROUND = 0, FT_STROKER_LINEJOIN_BEVEL = 1, FT_STROKER_LINEJOIN_MITER_VARIABLE = 2, FT_STROKER_LINEJOIN_MITER = FT_STROKER_LINEJOIN_MITER_VARIABLE , FT_STROKER_LINEJOIN_MITER_FIXED = 3 } FT_Stroker_LineJoin ; These values determine how two joining lines are rendered in a stroker.","title":"FT_Stroker_LineJoin"},{"location":"ft2-glyph_stroker.html#ft_stroker_linecap","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). typedef enum FT_Stroker_LineCap_ { FT_STROKER_LINECAP_BUTT = 0, FT_STROKER_LINECAP_ROUND , FT_STROKER_LINECAP_SQUARE } FT_Stroker_LineCap ; These values determine how the end of opened sub-paths are rendered in a stroke.","title":"FT_Stroker_LineCap"},{"location":"ft2-glyph_stroker.html#ft_strokerborder","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). typedef enum FT_StrokerBorder_ { FT_STROKER_BORDER_LEFT = 0, FT_STROKER_BORDER_RIGHT } FT_StrokerBorder ; These values are used to select a given stroke border in FT_Stroker_GetBorderCounts and FT_Stroker_ExportBorder .","title":"FT_StrokerBorder"},{"location":"ft2-glyph_stroker.html#ft_outline_getinsideborder","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_StrokerBorder ) FT_Outline_GetInsideBorder ( FT_Outline * outline ); Retrieve the FT_StrokerBorder value corresponding to the inside borders of a given outline.","title":"FT_Outline_GetInsideBorder"},{"location":"ft2-glyph_stroker.html#ft_outline_getoutsideborder","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_StrokerBorder ) FT_Outline_GetOutsideBorder ( FT_Outline * outline ); Retrieve the FT_StrokerBorder value corresponding to the outside borders of a given outline.","title":"FT_Outline_GetOutsideBorder"},{"location":"ft2-glyph_stroker.html#ft_glyph_stroke","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Glyph_Stroke ( FT_Glyph *pglyph, FT_Stroker stroker, FT_Bool destroy ); Stroke a given outline glyph object with a given stroker.","title":"FT_Glyph_Stroke"},{"location":"ft2-glyph_stroker.html#ft_glyph_strokeborder","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Glyph_StrokeBorder ( FT_Glyph *pglyph, FT_Stroker stroker, FT_Bool inside, FT_Bool destroy ); Stroke a given outline glyph object with a given stroker, but only return either its inside or outside border.","title":"FT_Glyph_StrokeBorder"},{"location":"ft2-glyph_stroker.html#ft_stroker_new","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_New ( FT_Library library, FT_Stroker *astroker ); Create a new stroker object.","title":"FT_Stroker_New"},{"location":"ft2-glyph_stroker.html#ft_stroker_set","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Set ( FT_Stroker stroker, FT_Fixed radius, FT_Stroker_LineCap line_cap, FT_Stroker_LineJoin line_join, FT_Fixed miter_limit ); Reset a stroker object's attributes.","title":"FT_Stroker_Set"},{"location":"ft2-glyph_stroker.html#ft_stroker_rewind","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Rewind ( FT_Stroker stroker ); Reset a stroker object without changing its attributes. You should call this function before beginning a new series of calls to FT_Stroker_BeginSubPath or FT_Stroker_EndSubPath .","title":"FT_Stroker_Rewind"},{"location":"ft2-glyph_stroker.html#ft_stroker_parseoutline","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_ParseOutline ( FT_Stroker stroker, FT_Outline * outline, FT_Bool opened ); A convenience function used to parse a whole outline with the stroker. The resulting outline(s) can be retrieved later by functions like FT_Stroker_GetCounts and FT_Stroker_Export .","title":"FT_Stroker_ParseOutline"},{"location":"ft2-glyph_stroker.html#ft_stroker_done","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Done ( FT_Stroker stroker ); Destroy a stroker object.","title":"FT_Stroker_Done"},{"location":"ft2-glyph_stroker.html#ft_stroker_beginsubpath","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_BeginSubPath ( FT_Stroker stroker, FT_Vector * to, FT_Bool open ); Start a new sub-path in the stroker.","title":"FT_Stroker_BeginSubPath"},{"location":"ft2-glyph_stroker.html#ft_stroker_endsubpath","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_EndSubPath ( FT_Stroker stroker ); Close the current sub-path in the stroker.","title":"FT_Stroker_EndSubPath"},{"location":"ft2-glyph_stroker.html#ft_stroker_lineto","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_LineTo ( FT_Stroker stroker, FT_Vector * to ); Draw a single line segment in the stroker's current sub-path, from the last position.","title":"FT_Stroker_LineTo"},{"location":"ft2-glyph_stroker.html#ft_stroker_conicto","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_ConicTo ( FT_Stroker stroker, FT_Vector * control, FT_Vector * to ); Draw a single quadratic Bezier in the stroker's current sub-path, from the last position.","title":"FT_Stroker_ConicTo"},{"location":"ft2-glyph_stroker.html#ft_stroker_cubicto","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_CubicTo ( FT_Stroker stroker, FT_Vector * control1, FT_Vector * control2, FT_Vector * to ); Draw a single cubic Bezier in the stroker's current sub-path, from the last position.","title":"FT_Stroker_CubicTo"},{"location":"ft2-glyph_stroker.html#ft_stroker_getbordercounts","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_GetBorderCounts ( FT_Stroker stroker, FT_StrokerBorder border, FT_UInt *anum_points, FT_UInt *anum_contours ); Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export one of the border or stroke outlines generated by the stroker.","title":"FT_Stroker_GetBorderCounts"},{"location":"ft2-glyph_stroker.html#ft_stroker_exportborder","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_ExportBorder ( FT_Stroker stroker, FT_StrokerBorder border, FT_Outline * outline ); Call this function after FT_Stroker_GetBorderCounts to export the corresponding border to your own FT_Outline structure. Note that this function appends the border points and contours to your outline, but does not try to resize its arrays.","title":"FT_Stroker_ExportBorder"},{"location":"ft2-glyph_stroker.html#ft_stroker_getcounts","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( FT_Error ) FT_Stroker_GetCounts ( FT_Stroker stroker, FT_UInt *anum_points, FT_UInt *anum_contours ); Call this function once you have finished parsing your paths with the stroker. It returns the number of points and contours necessary to export all points/borders from the stroked outline/path.","title":"FT_Stroker_GetCounts"},{"location":"ft2-glyph_stroker.html#ft_stroker_export","text":"Defined in FT_STROKER_H (freetype/ftstroke.h). FT_EXPORT( void ) FT_Stroker_Export ( FT_Stroker stroker, FT_Outline * outline ); Call this function after FT_Stroker_GetBorderCounts to export all borders to your own FT_Outline structure. Note that this function appends the border points and contours to your outline, but does not try to resize its arrays.","title":"FT_Stroker_Export"},{"location":"ft2-glyph_variants.html","text":"FreeType Docs Core API Unicode Variation Sequences Unicode Variation Sequences Synopsis Many characters, especially for CJK scripts, have variant forms. They are a sort of grey area somewhere between being totally irrelevant and semantically distinct; for this reason, the Unicode consortium decided to introduce Variation Sequences (VS), consisting of a Unicode base character and a variation selector instead of further extending the already huge number of characters. Unicode maintains two different sets, namely Standardized Variation Sequences and registered Ideographic Variation Sequences (IVS), collected in the Ideographic Variation Database (IVD). https://unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt https://unicode.org/reports/tr37/ https://unicode.org/ivd/ To date (January 2017), the character with the most ideographic variations is U+9089, having 32 such IVS. Three Mongolian Variation Selectors have the values U+180B-U+180D; 256 generic Variation Selectors are encoded in the ranges U+FE00-U+FE0F and U+E0100-U+E01EF. IVS currently use Variation Selectors from the range U+E0100-U+E01EF only. A VS consists of the base character value followed by a single Variation Selector. For example, to get the first variation of U+9089, you have to write the character sequence U+9089 U+E0100 . Adobe and MS decided to support both standardized and ideographic VS with a new cmap subtable (format 14). It is an odd subtable because it is not a mapping of input code points to glyphs, but contains lists of all variations supported by the font. A variation may be either default or non-default for a given font. A default variation is the one you will get for that code point if you look it up in the standard Unicode cmap. A non-default variation is a different glyph. FT_Face_GetCharVariantIndex Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt ) FT_Face_GetCharVariantIndex ( FT_Face face, FT_ULong charcode, FT_ULong variantSelector ); Return the glyph index of a given character code as modified by the variation selector. input face A handle to the source face object. charcode The character code point in Unicode. variantSelector The Unicode code point of the variation selector. return The glyph index. 0 means either undefined character code , or undefined selector code , or no variation selector cmap subtable , or current CharMap is not Unicode . note If you use FreeType to manipulate the contents of font files directly, be aware that the glyph index returned by this function doesn't always correspond to the internal indices used within the file. This is done to ensure that value 0 always corresponds to the missing glyph . This function is only meaningful if a) the font has a variation selector cmap sub table, and b) the current charmap has a Unicode encoding. since 2.3.6 FT_Face_GetCharVariantIsDefault Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Int ) FT_Face_GetCharVariantIsDefault ( FT_Face face, FT_ULong charcode, FT_ULong variantSelector ); Check whether this variation of this Unicode character is the one to be found in the charmap. input face A handle to the source face object. charcode The character codepoint in Unicode. variantSelector The Unicode codepoint of the variation selector. return 1 if found in the standard (Unicode) cmap, 0 if found in the variation selector cmap, or -1 if it is not a variation. note This function is only meaningful if the font has a variation selector cmap subtable. since 2.3.6 FT_Face_GetVariantSelectors Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt32 * ) FT_Face_GetVariantSelectors ( FT_Face face ); Return a zero-terminated list of Unicode variation selectors found in the font. input face A handle to the source face object. return A pointer to an array of selector code points, or NULL if there is no valid variation selector cmap subtable. note The last item in the array is 0; the array is owned by the FT_Face object but can be overwritten or released on the next call to a FreeType function. since 2.3.6 FT_Face_GetVariantsOfChar Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt32 * ) FT_Face_GetVariantsOfChar ( FT_Face face, FT_ULong charcode ); Return a zero-terminated list of Unicode variation selectors found for the specified character code. input face A handle to the source face object. charcode The character codepoint in Unicode. return A pointer to an array of variation selector code points that are active for the given character, or NULL if the corresponding list is empty. note The last item in the array is 0; the array is owned by the FT_Face object but can be overwritten or released on the next call to a FreeType function. since 2.3.6 FT_Face_GetCharsOfVariant Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt32 * ) FT_Face_GetCharsOfVariant ( FT_Face face, FT_ULong variantSelector ); Return a zero-terminated list of Unicode character codes found for the specified variation selector. input face A handle to the source face object. variantSelector The variation selector code point in Unicode. return A list of all the code points that are specified by this selector (both default and non-default codes are returned) or NULL if there is no valid cmap or the variation selector is invalid. note The last item in the array is 0; the array is owned by the FT_Face object but can be overwritten or released on the next call to a FreeType function. since 2.3.6","title":"Unicode Variation Sequences"},{"location":"ft2-glyph_variants.html#unicode-variation-sequences","text":"","title":"Unicode Variation Sequences"},{"location":"ft2-glyph_variants.html#synopsis","text":"Many characters, especially for CJK scripts, have variant forms. They are a sort of grey area somewhere between being totally irrelevant and semantically distinct; for this reason, the Unicode consortium decided to introduce Variation Sequences (VS), consisting of a Unicode base character and a variation selector instead of further extending the already huge number of characters. Unicode maintains two different sets, namely Standardized Variation Sequences and registered Ideographic Variation Sequences (IVS), collected in the Ideographic Variation Database (IVD). https://unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt https://unicode.org/reports/tr37/ https://unicode.org/ivd/ To date (January 2017), the character with the most ideographic variations is U+9089, having 32 such IVS. Three Mongolian Variation Selectors have the values U+180B-U+180D; 256 generic Variation Selectors are encoded in the ranges U+FE00-U+FE0F and U+E0100-U+E01EF. IVS currently use Variation Selectors from the range U+E0100-U+E01EF only. A VS consists of the base character value followed by a single Variation Selector. For example, to get the first variation of U+9089, you have to write the character sequence U+9089 U+E0100 . Adobe and MS decided to support both standardized and ideographic VS with a new cmap subtable (format 14). It is an odd subtable because it is not a mapping of input code points to glyphs, but contains lists of all variations supported by the font. A variation may be either default or non-default for a given font. A default variation is the one you will get for that code point if you look it up in the standard Unicode cmap. A non-default variation is a different glyph.","title":"Synopsis"},{"location":"ft2-glyph_variants.html#ft_face_getcharvariantindex","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt ) FT_Face_GetCharVariantIndex ( FT_Face face, FT_ULong charcode, FT_ULong variantSelector ); Return the glyph index of a given character code as modified by the variation selector.","title":"FT_Face_GetCharVariantIndex"},{"location":"ft2-glyph_variants.html#ft_face_getcharvariantisdefault","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Int ) FT_Face_GetCharVariantIsDefault ( FT_Face face, FT_ULong charcode, FT_ULong variantSelector ); Check whether this variation of this Unicode character is the one to be found in the charmap.","title":"FT_Face_GetCharVariantIsDefault"},{"location":"ft2-glyph_variants.html#ft_face_getvariantselectors","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt32 * ) FT_Face_GetVariantSelectors ( FT_Face face ); Return a zero-terminated list of Unicode variation selectors found in the font.","title":"FT_Face_GetVariantSelectors"},{"location":"ft2-glyph_variants.html#ft_face_getvariantsofchar","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt32 * ) FT_Face_GetVariantsOfChar ( FT_Face face, FT_ULong charcode ); Return a zero-terminated list of Unicode variation selectors found for the specified character code.","title":"FT_Face_GetVariantsOfChar"},{"location":"ft2-glyph_variants.html#ft_face_getcharsofvariant","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_UInt32 * ) FT_Face_GetCharsOfVariant ( FT_Face face, FT_ULong variantSelector ); Return a zero-terminated list of Unicode character codes found for the specified variation selector.","title":"FT_Face_GetCharsOfVariant"},{"location":"ft2-gx_validation.html","text":"FreeType Docs Miscellaneous TrueTypeGX/AAT Validation TrueTypeGX/AAT Validation Synopsis This section contains the declaration of functions to validate some TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop, lcar). FT_TrueTypeGX_Validate Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( FT_Error ) FT_TrueTypeGX_Validate ( FT_Face face, FT_UInt validation_flags, FT_Bytes tables[ FT_VALIDATE_GX_LENGTH ], FT_UInt table_length ); Validate various TrueTypeGX tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming). input face A handle to the input face. validation_flags A bit field that specifies the tables to be validated. See FT_VALIDATE_GXXXX for possible values. table_length The size of the tables array. Normally, FT_VALIDATE_GX_LENGTH should be passed. output tables The array where all validated sfnt tables are stored. The array itself must be allocated by a client. return FreeType error code. 0 means success. note This function only works with TrueTypeGX fonts, returning an error otherwise. After use, the application should deallocate the buffers pointed to by each tables element, by calling FT_TrueTypeGX_Free . A NULL value indicates that the table either doesn't exist in the font, the application hasn't asked for validation, or the validator doesn't have the ability to validate the sfnt table. FT_TrueTypeGX_Free Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( void ) FT_TrueTypeGX_Free ( FT_Face face, FT_Bytes table ); Free the buffer allocated by TrueTypeGX validator. input face A handle to the input face. table The pointer to the buffer allocated by FT_TrueTypeGX_Validate . note This function must be used to free the buffer allocated by FT_TrueTypeGX_Validate only. FT_ClassicKern_Validate Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( FT_Error ) FT_ClassicKern_Validate ( FT_Face face, FT_UInt validation_flags, FT_Bytes *ckern_table ); Validate classic (16-bit format) kern table to assure that the offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming). The kern table validator in FT_TrueTypeGX_Validate deals with both the new 32-bit format and the classic 16-bit format, while FT_ClassicKern_Validate only supports the classic 16-bit format. input face A handle to the input face. validation_flags A bit field that specifies the dialect to be validated. See FT_VALIDATE_CKERNXXX for possible values. output ckern_table A pointer to the kern table. return FreeType error code. 0 means success. note After use, the application should deallocate the buffers pointed to by ckern_table , by calling FT_ClassicKern_Free . A NULL value indicates that the table doesn't exist in the font. FT_ClassicKern_Free Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( void ) FT_ClassicKern_Free ( FT_Face face, FT_Bytes table ); Free the buffer allocated by classic Kern validator. input face A handle to the input face. table The pointer to the buffer that is allocated by FT_ClassicKern_Validate . note This function must be used to free the buffer allocated by FT_ClassicKern_Validate only. FT_VALIDATE_GX_LENGTH Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). # define FT_VALIDATE_GX_LENGTH ( FT_VALIDATE_GX_LAST_INDEX + 1 ) The number of tables checked in this module. Use it as a parameter for the table-length argument of function FT_TrueTypeGX_Validate . FT_VALIDATE_GXXXX Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). # define FT_VALIDATE_feat FT_VALIDATE_GX_BITFIELD( feat ) # define FT_VALIDATE_mort FT_VALIDATE_GX_BITFIELD( mort ) # define FT_VALIDATE_morx FT_VALIDATE_GX_BITFIELD( morx ) # define FT_VALIDATE_bsln FT_VALIDATE_GX_BITFIELD( bsln ) # define FT_VALIDATE_just FT_VALIDATE_GX_BITFIELD( just ) # define FT_VALIDATE_kern FT_VALIDATE_GX_BITFIELD( kern ) # define FT_VALIDATE_opbd FT_VALIDATE_GX_BITFIELD( opbd ) # define FT_VALIDATE_trak FT_VALIDATE_GX_BITFIELD( trak ) # define FT_VALIDATE_prop FT_VALIDATE_GX_BITFIELD( prop ) # define FT_VALIDATE_lcar FT_VALIDATE_GX_BITFIELD( lcar ) # define FT_VALIDATE_GX ( FT_VALIDATE_feat | \\ FT_VALIDATE_mort | \\ FT_VALIDATE_morx | \\ FT_VALIDATE_bsln | \\ FT_VALIDATE_just | \\ FT_VALIDATE_kern | \\ FT_VALIDATE_opbd | \\ FT_VALIDATE_trak | \\ FT_VALIDATE_prop | \\ FT_VALIDATE_lcar ) A list of bit-field constants used with FT_TrueTypeGX_Validate to indicate which TrueTypeGX/AAT Type tables should be validated. values FT_VALIDATE_feat Validate feat table. FT_VALIDATE_mort Validate mort table. FT_VALIDATE_morx Validate morx table. FT_VALIDATE_bsln Validate bsln table. FT_VALIDATE_just Validate just table. FT_VALIDATE_kern Validate kern table. FT_VALIDATE_opbd Validate opbd table. FT_VALIDATE_trak Validate trak table. FT_VALIDATE_prop Validate prop table. FT_VALIDATE_lcar Validate lcar table. FT_VALIDATE_GX Validate all TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop and lcar). FT_VALIDATE_CKERNXXX Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). # define FT_VALIDATE_MS ( FT_VALIDATE_GX_START 0 ) # define FT_VALIDATE_APPLE ( FT_VALIDATE_GX_START 1 ) # define FT_VALIDATE_CKERN ( FT_VALIDATE_MS | FT_VALIDATE_APPLE ) A list of bit-field constants used with FT_ClassicKern_Validate to indicate the classic kern dialect or dialects. If the selected type doesn't fit, FT_ClassicKern_Validate regards the table as invalid. values FT_VALIDATE_MS Handle the kern table as a classic Microsoft kern table. FT_VALIDATE_APPLE Handle the kern table as a classic Apple kern table. FT_VALIDATE_CKERN Handle the kern as either classic Apple or Microsoft kern table.","title":"TrueTypeGX/AAT Validation"},{"location":"ft2-gx_validation.html#truetypegxaat-validation","text":"","title":"TrueTypeGX/AAT Validation"},{"location":"ft2-gx_validation.html#synopsis","text":"This section contains the declaration of functions to validate some TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop, lcar).","title":"Synopsis"},{"location":"ft2-gx_validation.html#ft_truetypegx_validate","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( FT_Error ) FT_TrueTypeGX_Validate ( FT_Face face, FT_UInt validation_flags, FT_Bytes tables[ FT_VALIDATE_GX_LENGTH ], FT_UInt table_length ); Validate various TrueTypeGX tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).","title":"FT_TrueTypeGX_Validate"},{"location":"ft2-gx_validation.html#ft_truetypegx_free","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( void ) FT_TrueTypeGX_Free ( FT_Face face, FT_Bytes table ); Free the buffer allocated by TrueTypeGX validator.","title":"FT_TrueTypeGX_Free"},{"location":"ft2-gx_validation.html#ft_classickern_validate","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( FT_Error ) FT_ClassicKern_Validate ( FT_Face face, FT_UInt validation_flags, FT_Bytes *ckern_table ); Validate classic (16-bit format) kern table to assure that the offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming). The kern table validator in FT_TrueTypeGX_Validate deals with both the new 32-bit format and the classic 16-bit format, while FT_ClassicKern_Validate only supports the classic 16-bit format.","title":"FT_ClassicKern_Validate"},{"location":"ft2-gx_validation.html#ft_classickern_free","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). FT_EXPORT( void ) FT_ClassicKern_Free ( FT_Face face, FT_Bytes table ); Free the buffer allocated by classic Kern validator.","title":"FT_ClassicKern_Free"},{"location":"ft2-gx_validation.html#ft_validate_gx_length","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). # define FT_VALIDATE_GX_LENGTH ( FT_VALIDATE_GX_LAST_INDEX + 1 ) The number of tables checked in this module. Use it as a parameter for the table-length argument of function FT_TrueTypeGX_Validate .","title":"FT_VALIDATE_GX_LENGTH"},{"location":"ft2-gx_validation.html#ft_validate_gxxxx","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). # define FT_VALIDATE_feat FT_VALIDATE_GX_BITFIELD( feat ) # define FT_VALIDATE_mort FT_VALIDATE_GX_BITFIELD( mort ) # define FT_VALIDATE_morx FT_VALIDATE_GX_BITFIELD( morx ) # define FT_VALIDATE_bsln FT_VALIDATE_GX_BITFIELD( bsln ) # define FT_VALIDATE_just FT_VALIDATE_GX_BITFIELD( just ) # define FT_VALIDATE_kern FT_VALIDATE_GX_BITFIELD( kern ) # define FT_VALIDATE_opbd FT_VALIDATE_GX_BITFIELD( opbd ) # define FT_VALIDATE_trak FT_VALIDATE_GX_BITFIELD( trak ) # define FT_VALIDATE_prop FT_VALIDATE_GX_BITFIELD( prop ) # define FT_VALIDATE_lcar FT_VALIDATE_GX_BITFIELD( lcar ) # define FT_VALIDATE_GX ( FT_VALIDATE_feat | \\ FT_VALIDATE_mort | \\ FT_VALIDATE_morx | \\ FT_VALIDATE_bsln | \\ FT_VALIDATE_just | \\ FT_VALIDATE_kern | \\ FT_VALIDATE_opbd | \\ FT_VALIDATE_trak | \\ FT_VALIDATE_prop | \\ FT_VALIDATE_lcar ) A list of bit-field constants used with FT_TrueTypeGX_Validate to indicate which TrueTypeGX/AAT Type tables should be validated.","title":"FT_VALIDATE_GXXXX"},{"location":"ft2-gx_validation.html#ft_validate_ckernxxx","text":"Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). # define FT_VALIDATE_MS ( FT_VALIDATE_GX_START 0 ) # define FT_VALIDATE_APPLE ( FT_VALIDATE_GX_START 1 ) # define FT_VALIDATE_CKERN ( FT_VALIDATE_MS | FT_VALIDATE_APPLE ) A list of bit-field constants used with FT_ClassicKern_Validate to indicate the classic kern dialect or dialects. If the selected type doesn't fit, FT_ClassicKern_Validate regards the table as invalid.","title":"FT_VALIDATE_CKERNXXX"},{"location":"ft2-gzip.html","text":"FreeType Docs Support API GZIP Streams GZIP Streams Synopsis This section contains the declaration of Gzip-specific functions. FT_Stream_OpenGzip Defined in FT_GZIP_H (freetype/ftgzip.h). FT_EXPORT( FT_Error ) FT_Stream_OpenGzip ( FT_Stream stream, FT_Stream source ); Open a new stream to parse gzip-compressed font files. This is mainly used to support the compressed *.pcf.gz fonts that come with XFree86. input stream The target embedding stream. source The source stream. return FreeType error code. 0 means success. note The source stream must be opened before calling this function. Calling the internal function FT_Stream_Close on the new stream will not call FT_Stream_Close on the source stream. None of the stream objects will be released to the heap. The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream. In certain builds of the library, gzip compression recognition is automatically handled when calling FT_New_Face or FT_Open_Face . This means that if no font driver is capable of handling the raw compressed file, the library will try to open a gzipped stream from it and re-open the face with it. This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with zlib support. FT_Gzip_Uncompress Defined in FT_GZIP_H (freetype/ftgzip.h). FT_EXPORT( FT_Error ) FT_Gzip_Uncompress ( FT_Memory memory, FT_Byte * output, FT_ULong * output_len, const FT_Byte * input, FT_ULong input_len ); Decompress a zipped input buffer into an output buffer. This function is modeled after zlib's uncompress function. input memory A FreeType memory handle. input The input buffer. input_len The length of the input buffer. output output The output buffer. inout output_len Before calling the function, this is the total size of the output buffer, which must be large enough to hold the entire uncompressed data (so the size of the uncompressed data must be known in advance). After calling the function, output_len is the size of the used data in output . return FreeType error code. 0 means success. note This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with zlib support. since 2.5.1","title":"GZIP Streams"},{"location":"ft2-gzip.html#gzip-streams","text":"","title":"GZIP Streams"},{"location":"ft2-gzip.html#synopsis","text":"This section contains the declaration of Gzip-specific functions.","title":"Synopsis"},{"location":"ft2-gzip.html#ft_stream_opengzip","text":"Defined in FT_GZIP_H (freetype/ftgzip.h). FT_EXPORT( FT_Error ) FT_Stream_OpenGzip ( FT_Stream stream, FT_Stream source ); Open a new stream to parse gzip-compressed font files. This is mainly used to support the compressed *.pcf.gz fonts that come with XFree86.","title":"FT_Stream_OpenGzip"},{"location":"ft2-gzip.html#ft_gzip_uncompress","text":"Defined in FT_GZIP_H (freetype/ftgzip.h). FT_EXPORT( FT_Error ) FT_Gzip_Uncompress ( FT_Memory memory, FT_Byte * output, FT_ULong * output_len, const FT_Byte * input, FT_ULong input_len ); Decompress a zipped input buffer into an output buffer. This function is modeled after zlib's uncompress function.","title":"FT_Gzip_Uncompress"},{"location":"ft2-header_file_macros.html","text":"FreeType Docs Core API Header File Macros Header File Macros Synopsis The following macros are defined to the name of specific FreeType 2 header files. They can be used directly in #include statements as in: #include FT_FREETYPE_H #include FT_MULTIPLE_MASTERS_H #include FT_GLYPH_H There are several reasons why we are now using macros to name public header files. The first one is that such macros are not limited to the infamous 8.3 naming rule required by DOS (and FT_MULTIPLE_MASTERS_H is a lot more meaningful than ftmm.h ). The second reason is that it allows for more flexibility in the way FreeType 2 is installed on a given system. FT_CONFIG_CONFIG_H # ifndef FT_CONFIG_CONFIG_H # define FT_CONFIG_CONFIG_H freetype/config/ftconfig.h # endif A macro used in #include statements to name the file containing FreeType 2 configuration data. FT_CONFIG_STANDARD_LIBRARY_H # ifndef FT_CONFIG_STANDARD_LIBRARY_H # define FT_CONFIG_STANDARD_LIBRARY_H freetype/config/ftstdlib.h # endif A macro used in #include statements to name the file containing FreeType 2 interface to the standard C library functions. FT_CONFIG_OPTIONS_H # ifndef FT_CONFIG_OPTIONS_H # define FT_CONFIG_OPTIONS_H freetype/config/ftoption.h # endif A macro used in #include statements to name the file containing FreeType 2 project-specific configuration options. FT_CONFIG_MODULES_H # ifndef FT_CONFIG_MODULES_H # define FT_CONFIG_MODULES_H freetype/config/ftmodule.h # endif A macro used in #include statements to name the file containing the list of FreeType 2 modules that are statically linked to new library instances in FT_Init_FreeType . FT_FREETYPE_H # define FT_FREETYPE_H freetype/freetype.h A macro used in #include statements to name the file containing the base FreeType 2 API. FT_ERRORS_H # define FT_ERRORS_H freetype/fterrors.h A macro used in #include statements to name the file containing the list of FreeType 2 error codes (and messages). It is included by FT_FREETYPE_H . FT_MODULE_ERRORS_H # define FT_MODULE_ERRORS_H freetype/ftmoderr.h A macro used in #include statements to name the file containing the list of FreeType 2 module error offsets (and messages). FT_SYSTEM_H # define FT_SYSTEM_H freetype/ftsystem.h A macro used in #include statements to name the file containing the FreeType 2 interface to low-level operations (i.e., memory management and stream i/o). It is included by FT_FREETYPE_H . FT_IMAGE_H # define FT_IMAGE_H freetype/ftimage.h A macro used in #include statements to name the file containing type definitions related to glyph images (i.e., bitmaps, outlines, scan-converter parameters). It is included by FT_FREETYPE_H . FT_TYPES_H # define FT_TYPES_H freetype/fttypes.h A macro used in #include statements to name the file containing the basic data types defined by FreeType 2. It is included by FT_FREETYPE_H . FT_LIST_H # define FT_LIST_H freetype/ftlist.h A macro used in #include statements to name the file containing the list management API of FreeType 2. (Most applications will never need to include this file.) FT_OUTLINE_H # define FT_OUTLINE_H freetype/ftoutln.h A macro used in #include statements to name the file containing the scalable outline management API of FreeType 2. FT_SIZES_H # define FT_SIZES_H freetype/ftsizes.h A macro used in #include statements to name the file containing the API which manages multiple FT_Size objects per face. FT_MODULE_H # define FT_MODULE_H freetype/ftmodapi.h A macro used in #include statements to name the file containing the module management API of FreeType 2. FT_RENDER_H # define FT_RENDER_H freetype/ftrender.h A macro used in #include statements to name the file containing the renderer module management API of FreeType 2. FT_DRIVER_H # define FT_DRIVER_H freetype/ftdriver.h A macro used in #include statements to name the file containing structures and macros related to the driver modules. FT_AUTOHINTER_H # define FT_AUTOHINTER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the auto-hinting module. Deprecated since version 2.9; use FT_DRIVER_H instead. FT_CFF_DRIVER_H # define FT_CFF_DRIVER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the CFF driver module. Deprecated since version 2.9; use FT_DRIVER_H instead. FT_TRUETYPE_DRIVER_H # define FT_TRUETYPE_DRIVER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the TrueType driver module. Deprecated since version 2.9; use FT_DRIVER_H instead. FT_PCF_DRIVER_H # define FT_PCF_DRIVER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the PCF driver module. Deprecated since version 2.9; use FT_DRIVER_H instead. FT_TYPE1_TABLES_H # define FT_TYPE1_TABLES_H freetype/t1tables.h A macro used in #include statements to name the file containing the types and API specific to the Type 1 format. FT_TRUETYPE_IDS_H # define FT_TRUETYPE_IDS_H freetype/ttnameid.h A macro used in #include statements to name the file containing the enumeration values which identify name strings, languages, encodings, etc. This file really contains a large set of constant macro definitions, taken from the TrueType and OpenType specifications. FT_TRUETYPE_TABLES_H # define FT_TRUETYPE_TABLES_H freetype/tttables.h A macro used in #include statements to name the file containing the types and API specific to the TrueType (as well as OpenType) format. FT_TRUETYPE_TAGS_H # define FT_TRUETYPE_TAGS_H freetype/tttags.h A macro used in #include statements to name the file containing the definitions of TrueType four-byte tags which identify blocks in SFNT-based font formats (i.e., TrueType and OpenType). FT_BDF_H # define FT_BDF_H freetype/ftbdf.h A macro used in #include statements to name the file containing the definitions of an API which accesses BDF-specific strings from a face. FT_CID_H # define FT_CID_H freetype/ftcid.h A macro used in #include statements to name the file containing the definitions of an API which access CID font information from a face. FT_GZIP_H # define FT_GZIP_H freetype/ftgzip.h A macro used in #include statements to name the file containing the definitions of an API which supports gzip-compressed files. FT_LZW_H # define FT_LZW_H freetype/ftlzw.h A macro used in #include statements to name the file containing the definitions of an API which supports LZW-compressed files. FT_BZIP2_H # define FT_BZIP2_H freetype/ftbzip2.h A macro used in #include statements to name the file containing the definitions of an API which supports bzip2-compressed files. FT_WINFONTS_H # define FT_WINFONTS_H freetype/ftwinfnt.h A macro used in #include statements to name the file containing the definitions of an API which supports Windows FNT files. FT_GLYPH_H # define FT_GLYPH_H freetype/ftglyph.h A macro used in #include statements to name the file containing the API of the optional glyph management component. FT_BITMAP_H # define FT_BITMAP_H freetype/ftbitmap.h A macro used in #include statements to name the file containing the API of the optional bitmap conversion component. FT_BBOX_H # define FT_BBOX_H freetype/ftbbox.h A macro used in #include statements to name the file containing the API of the optional exact bounding box computation routines. FT_CACHE_H # define FT_CACHE_H freetype/ftcache.h A macro used in #include statements to name the file containing the API of the optional FreeType 2 cache sub-system. FT_MAC_H # define FT_MAC_H freetype/ftmac.h A macro used in #include statements to name the file containing the Macintosh-specific FreeType 2 API. The latter is used to access fonts embedded in resource forks. This header file must be explicitly included by client applications compiled on the Mac (note that the base API still works though). FT_MULTIPLE_MASTERS_H # define FT_MULTIPLE_MASTERS_H freetype/ftmm.h A macro used in #include statements to name the file containing the optional multiple-masters management API of FreeType 2. FT_SFNT_NAMES_H # define FT_SFNT_NAMES_H freetype/ftsnames.h A macro used in #include statements to name the file containing the optional FreeType 2 API which accesses embedded name strings in SFNT-based font formats (i.e., TrueType and OpenType). FT_OPENTYPE_VALIDATE_H # define FT_OPENTYPE_VALIDATE_H freetype/ftotval.h A macro used in #include statements to name the file containing the optional FreeType 2 API which validates OpenType tables ( BASE , GDEF , GPOS , GSUB , JSTF ). FT_GX_VALIDATE_H # define FT_GX_VALIDATE_H freetype/ftgxval.h A macro used in #include statements to name the file containing the optional FreeType 2 API which validates TrueTypeGX/AAT tables ( feat , mort , morx , bsln , just , kern , opbd , trak , prop ). FT_PFR_H # define FT_PFR_H freetype/ftpfr.h A macro used in #include statements to name the file containing the FreeType 2 API which accesses PFR-specific data. FT_STROKER_H # define FT_STROKER_H freetype/ftstroke.h A macro used in #include statements to name the file containing the FreeType 2 API which provides functions to stroke outline paths. FT_SYNTHESIS_H # define FT_SYNTHESIS_H freetype/ftsynth.h A macro used in #include statements to name the file containing the FreeType 2 API which performs artificial obliquing and emboldening. FT_FONT_FORMATS_H # define FT_FONT_FORMATS_H freetype/ftfntfmt.h /* deprecated */ # define FT_XFREE86_H FT_FONT_FORMATS_H A macro used in #include statements to name the file containing the FreeType 2 API which provides functions specific to font formats. FT_TRIGONOMETRY_H # define FT_TRIGONOMETRY_H freetype/fttrigon.h A macro used in #include statements to name the file containing the FreeType 2 API which performs trigonometric computations (e.g., cosines and arc tangents). FT_LCD_FILTER_H # define FT_LCD_FILTER_H freetype/ftlcdfil.h A macro used in #include statements to name the file containing the FreeType 2 API which performs color filtering for subpixel rendering. FT_INCREMENTAL_H # define FT_INCREMENTAL_H freetype/ftincrem.h A macro used in #include statements to name the file containing the FreeType 2 API which performs incremental glyph loading. FT_GASP_H # define FT_GASP_H freetype/ftgasp.h A macro used in #include statements to name the file containing the FreeType 2 API which returns entries from the TrueType GASP table. FT_ADVANCES_H # define FT_ADVANCES_H freetype/ftadvanc.h A macro used in #include statements to name the file containing the FreeType 2 API which returns individual and ranged glyph advances. FT_COLOR_H # define FT_COLOR_H freetype/ftcolor.h A macro used in #include statements to name the file containing the FreeType 2 API which handles the OpenType CPAL table.","title":"Header File Macros"},{"location":"ft2-header_file_macros.html#header-file-macros","text":"","title":"Header File Macros"},{"location":"ft2-header_file_macros.html#synopsis","text":"The following macros are defined to the name of specific FreeType 2 header files. They can be used directly in #include statements as in: #include FT_FREETYPE_H #include FT_MULTIPLE_MASTERS_H #include FT_GLYPH_H There are several reasons why we are now using macros to name public header files. The first one is that such macros are not limited to the infamous 8.3 naming rule required by DOS (and FT_MULTIPLE_MASTERS_H is a lot more meaningful than ftmm.h ). The second reason is that it allows for more flexibility in the way FreeType 2 is installed on a given system.","title":"Synopsis"},{"location":"ft2-header_file_macros.html#ft_config_config_h","text":"# ifndef FT_CONFIG_CONFIG_H # define FT_CONFIG_CONFIG_H freetype/config/ftconfig.h # endif A macro used in #include statements to name the file containing FreeType 2 configuration data.","title":"FT_CONFIG_CONFIG_H"},{"location":"ft2-header_file_macros.html#ft_config_standard_library_h","text":"# ifndef FT_CONFIG_STANDARD_LIBRARY_H # define FT_CONFIG_STANDARD_LIBRARY_H freetype/config/ftstdlib.h # endif A macro used in #include statements to name the file containing FreeType 2 interface to the standard C library functions.","title":"FT_CONFIG_STANDARD_LIBRARY_H"},{"location":"ft2-header_file_macros.html#ft_config_options_h","text":"# ifndef FT_CONFIG_OPTIONS_H # define FT_CONFIG_OPTIONS_H freetype/config/ftoption.h # endif A macro used in #include statements to name the file containing FreeType 2 project-specific configuration options.","title":"FT_CONFIG_OPTIONS_H"},{"location":"ft2-header_file_macros.html#ft_config_modules_h","text":"# ifndef FT_CONFIG_MODULES_H # define FT_CONFIG_MODULES_H freetype/config/ftmodule.h # endif A macro used in #include statements to name the file containing the list of FreeType 2 modules that are statically linked to new library instances in FT_Init_FreeType .","title":"FT_CONFIG_MODULES_H"},{"location":"ft2-header_file_macros.html#ft_freetype_h","text":"# define FT_FREETYPE_H freetype/freetype.h A macro used in #include statements to name the file containing the base FreeType 2 API.","title":"FT_FREETYPE_H"},{"location":"ft2-header_file_macros.html#ft_errors_h","text":"# define FT_ERRORS_H freetype/fterrors.h A macro used in #include statements to name the file containing the list of FreeType 2 error codes (and messages). It is included by FT_FREETYPE_H .","title":"FT_ERRORS_H"},{"location":"ft2-header_file_macros.html#ft_module_errors_h","text":"# define FT_MODULE_ERRORS_H freetype/ftmoderr.h A macro used in #include statements to name the file containing the list of FreeType 2 module error offsets (and messages).","title":"FT_MODULE_ERRORS_H"},{"location":"ft2-header_file_macros.html#ft_system_h","text":"# define FT_SYSTEM_H freetype/ftsystem.h A macro used in #include statements to name the file containing the FreeType 2 interface to low-level operations (i.e., memory management and stream i/o). It is included by FT_FREETYPE_H .","title":"FT_SYSTEM_H"},{"location":"ft2-header_file_macros.html#ft_image_h","text":"# define FT_IMAGE_H freetype/ftimage.h A macro used in #include statements to name the file containing type definitions related to glyph images (i.e., bitmaps, outlines, scan-converter parameters). It is included by FT_FREETYPE_H .","title":"FT_IMAGE_H"},{"location":"ft2-header_file_macros.html#ft_types_h","text":"# define FT_TYPES_H freetype/fttypes.h A macro used in #include statements to name the file containing the basic data types defined by FreeType 2. It is included by FT_FREETYPE_H .","title":"FT_TYPES_H"},{"location":"ft2-header_file_macros.html#ft_list_h","text":"# define FT_LIST_H freetype/ftlist.h A macro used in #include statements to name the file containing the list management API of FreeType 2. (Most applications will never need to include this file.)","title":"FT_LIST_H"},{"location":"ft2-header_file_macros.html#ft_outline_h","text":"# define FT_OUTLINE_H freetype/ftoutln.h A macro used in #include statements to name the file containing the scalable outline management API of FreeType 2.","title":"FT_OUTLINE_H"},{"location":"ft2-header_file_macros.html#ft_sizes_h","text":"# define FT_SIZES_H freetype/ftsizes.h A macro used in #include statements to name the file containing the API which manages multiple FT_Size objects per face.","title":"FT_SIZES_H"},{"location":"ft2-header_file_macros.html#ft_module_h","text":"# define FT_MODULE_H freetype/ftmodapi.h A macro used in #include statements to name the file containing the module management API of FreeType 2.","title":"FT_MODULE_H"},{"location":"ft2-header_file_macros.html#ft_render_h","text":"# define FT_RENDER_H freetype/ftrender.h A macro used in #include statements to name the file containing the renderer module management API of FreeType 2.","title":"FT_RENDER_H"},{"location":"ft2-header_file_macros.html#ft_driver_h","text":"# define FT_DRIVER_H freetype/ftdriver.h A macro used in #include statements to name the file containing structures and macros related to the driver modules.","title":"FT_DRIVER_H"},{"location":"ft2-header_file_macros.html#ft_autohinter_h","text":"# define FT_AUTOHINTER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the auto-hinting module. Deprecated since version 2.9; use FT_DRIVER_H instead.","title":"FT_AUTOHINTER_H"},{"location":"ft2-header_file_macros.html#ft_cff_driver_h","text":"# define FT_CFF_DRIVER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the CFF driver module. Deprecated since version 2.9; use FT_DRIVER_H instead.","title":"FT_CFF_DRIVER_H"},{"location":"ft2-header_file_macros.html#ft_truetype_driver_h","text":"# define FT_TRUETYPE_DRIVER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the TrueType driver module. Deprecated since version 2.9; use FT_DRIVER_H instead.","title":"FT_TRUETYPE_DRIVER_H"},{"location":"ft2-header_file_macros.html#ft_pcf_driver_h","text":"# define FT_PCF_DRIVER_H FT_DRIVER_H A macro used in #include statements to name the file containing structures and macros related to the PCF driver module. Deprecated since version 2.9; use FT_DRIVER_H instead.","title":"FT_PCF_DRIVER_H"},{"location":"ft2-header_file_macros.html#ft_type1_tables_h","text":"# define FT_TYPE1_TABLES_H freetype/t1tables.h A macro used in #include statements to name the file containing the types and API specific to the Type 1 format.","title":"FT_TYPE1_TABLES_H"},{"location":"ft2-header_file_macros.html#ft_truetype_ids_h","text":"# define FT_TRUETYPE_IDS_H freetype/ttnameid.h A macro used in #include statements to name the file containing the enumeration values which identify name strings, languages, encodings, etc. This file really contains a large set of constant macro definitions, taken from the TrueType and OpenType specifications.","title":"FT_TRUETYPE_IDS_H"},{"location":"ft2-header_file_macros.html#ft_truetype_tables_h","text":"# define FT_TRUETYPE_TABLES_H freetype/tttables.h A macro used in #include statements to name the file containing the types and API specific to the TrueType (as well as OpenType) format.","title":"FT_TRUETYPE_TABLES_H"},{"location":"ft2-header_file_macros.html#ft_truetype_tags_h","text":"# define FT_TRUETYPE_TAGS_H freetype/tttags.h A macro used in #include statements to name the file containing the definitions of TrueType four-byte tags which identify blocks in SFNT-based font formats (i.e., TrueType and OpenType).","title":"FT_TRUETYPE_TAGS_H"},{"location":"ft2-header_file_macros.html#ft_bdf_h","text":"# define FT_BDF_H freetype/ftbdf.h A macro used in #include statements to name the file containing the definitions of an API which accesses BDF-specific strings from a face.","title":"FT_BDF_H"},{"location":"ft2-header_file_macros.html#ft_cid_h","text":"# define FT_CID_H freetype/ftcid.h A macro used in #include statements to name the file containing the definitions of an API which access CID font information from a face.","title":"FT_CID_H"},{"location":"ft2-header_file_macros.html#ft_gzip_h","text":"# define FT_GZIP_H freetype/ftgzip.h A macro used in #include statements to name the file containing the definitions of an API which supports gzip-compressed files.","title":"FT_GZIP_H"},{"location":"ft2-header_file_macros.html#ft_lzw_h","text":"# define FT_LZW_H freetype/ftlzw.h A macro used in #include statements to name the file containing the definitions of an API which supports LZW-compressed files.","title":"FT_LZW_H"},{"location":"ft2-header_file_macros.html#ft_bzip2_h","text":"# define FT_BZIP2_H freetype/ftbzip2.h A macro used in #include statements to name the file containing the definitions of an API which supports bzip2-compressed files.","title":"FT_BZIP2_H"},{"location":"ft2-header_file_macros.html#ft_winfonts_h","text":"# define FT_WINFONTS_H freetype/ftwinfnt.h A macro used in #include statements to name the file containing the definitions of an API which supports Windows FNT files.","title":"FT_WINFONTS_H"},{"location":"ft2-header_file_macros.html#ft_glyph_h","text":"# define FT_GLYPH_H freetype/ftglyph.h A macro used in #include statements to name the file containing the API of the optional glyph management component.","title":"FT_GLYPH_H"},{"location":"ft2-header_file_macros.html#ft_bitmap_h","text":"# define FT_BITMAP_H freetype/ftbitmap.h A macro used in #include statements to name the file containing the API of the optional bitmap conversion component.","title":"FT_BITMAP_H"},{"location":"ft2-header_file_macros.html#ft_bbox_h","text":"# define FT_BBOX_H freetype/ftbbox.h A macro used in #include statements to name the file containing the API of the optional exact bounding box computation routines.","title":"FT_BBOX_H"},{"location":"ft2-header_file_macros.html#ft_cache_h","text":"# define FT_CACHE_H freetype/ftcache.h A macro used in #include statements to name the file containing the API of the optional FreeType 2 cache sub-system.","title":"FT_CACHE_H"},{"location":"ft2-header_file_macros.html#ft_mac_h","text":"# define FT_MAC_H freetype/ftmac.h A macro used in #include statements to name the file containing the Macintosh-specific FreeType 2 API. The latter is used to access fonts embedded in resource forks. This header file must be explicitly included by client applications compiled on the Mac (note that the base API still works though).","title":"FT_MAC_H"},{"location":"ft2-header_file_macros.html#ft_multiple_masters_h","text":"# define FT_MULTIPLE_MASTERS_H freetype/ftmm.h A macro used in #include statements to name the file containing the optional multiple-masters management API of FreeType 2.","title":"FT_MULTIPLE_MASTERS_H"},{"location":"ft2-header_file_macros.html#ft_sfnt_names_h","text":"# define FT_SFNT_NAMES_H freetype/ftsnames.h A macro used in #include statements to name the file containing the optional FreeType 2 API which accesses embedded name strings in SFNT-based font formats (i.e., TrueType and OpenType).","title":"FT_SFNT_NAMES_H"},{"location":"ft2-header_file_macros.html#ft_opentype_validate_h","text":"# define FT_OPENTYPE_VALIDATE_H freetype/ftotval.h A macro used in #include statements to name the file containing the optional FreeType 2 API which validates OpenType tables ( BASE , GDEF , GPOS , GSUB , JSTF ).","title":"FT_OPENTYPE_VALIDATE_H"},{"location":"ft2-header_file_macros.html#ft_gx_validate_h","text":"# define FT_GX_VALIDATE_H freetype/ftgxval.h A macro used in #include statements to name the file containing the optional FreeType 2 API which validates TrueTypeGX/AAT tables ( feat , mort , morx , bsln , just , kern , opbd , trak , prop ).","title":"FT_GX_VALIDATE_H"},{"location":"ft2-header_file_macros.html#ft_pfr_h","text":"# define FT_PFR_H freetype/ftpfr.h A macro used in #include statements to name the file containing the FreeType 2 API which accesses PFR-specific data.","title":"FT_PFR_H"},{"location":"ft2-header_file_macros.html#ft_stroker_h","text":"# define FT_STROKER_H freetype/ftstroke.h A macro used in #include statements to name the file containing the FreeType 2 API which provides functions to stroke outline paths.","title":"FT_STROKER_H"},{"location":"ft2-header_file_macros.html#ft_synthesis_h","text":"# define FT_SYNTHESIS_H freetype/ftsynth.h A macro used in #include statements to name the file containing the FreeType 2 API which performs artificial obliquing and emboldening.","title":"FT_SYNTHESIS_H"},{"location":"ft2-header_file_macros.html#ft_font_formats_h","text":"# define FT_FONT_FORMATS_H freetype/ftfntfmt.h /* deprecated */ # define FT_XFREE86_H FT_FONT_FORMATS_H A macro used in #include statements to name the file containing the FreeType 2 API which provides functions specific to font formats.","title":"FT_FONT_FORMATS_H"},{"location":"ft2-header_file_macros.html#ft_trigonometry_h","text":"# define FT_TRIGONOMETRY_H freetype/fttrigon.h A macro used in #include statements to name the file containing the FreeType 2 API which performs trigonometric computations (e.g., cosines and arc tangents).","title":"FT_TRIGONOMETRY_H"},{"location":"ft2-header_file_macros.html#ft_lcd_filter_h","text":"# define FT_LCD_FILTER_H freetype/ftlcdfil.h A macro used in #include statements to name the file containing the FreeType 2 API which performs color filtering for subpixel rendering.","title":"FT_LCD_FILTER_H"},{"location":"ft2-header_file_macros.html#ft_incremental_h","text":"# define FT_INCREMENTAL_H freetype/ftincrem.h A macro used in #include statements to name the file containing the FreeType 2 API which performs incremental glyph loading.","title":"FT_INCREMENTAL_H"},{"location":"ft2-header_file_macros.html#ft_gasp_h","text":"# define FT_GASP_H freetype/ftgasp.h A macro used in #include statements to name the file containing the FreeType 2 API which returns entries from the TrueType GASP table.","title":"FT_GASP_H"},{"location":"ft2-header_file_macros.html#ft_advances_h","text":"# define FT_ADVANCES_H freetype/ftadvanc.h A macro used in #include statements to name the file containing the FreeType 2 API which returns individual and ranged glyph advances.","title":"FT_ADVANCES_H"},{"location":"ft2-header_file_macros.html#ft_color_h","text":"# define FT_COLOR_H freetype/ftcolor.h A macro used in #include statements to name the file containing the FreeType 2 API which handles the OpenType CPAL table.","title":"FT_COLOR_H"},{"location":"ft2-header_inclusion.html","text":"FreeType Docs General Remarks FreeType's header inclusion scheme FreeType's header inclusion scheme Synopsis To be as flexible as possible (and for historical reasons), FreeType uses a very special inclusion scheme to load header files, for example #include ft2build.h #include FT_FREETYPE_H #include FT_OUTLINE_H A compiler and its preprocessor only needs an include path to find the file ft2build.h ; the exact locations and names of the other FreeType header files are hidden by Header File Macros , loaded by ft2build.h . The API documentation always gives the header macro name needed for a particular function.","title":"FreeType's header inclusion scheme"},{"location":"ft2-header_inclusion.html#freetypes-header-inclusion-scheme","text":"","title":"FreeType's header inclusion scheme"},{"location":"ft2-header_inclusion.html#synopsis","text":"To be as flexible as possible (and for historical reasons), FreeType uses a very special inclusion scheme to load header files, for example #include ft2build.h #include FT_FREETYPE_H #include FT_OUTLINE_H A compiler and its preprocessor only needs an include path to find the file ft2build.h ; the exact locations and names of the other FreeType header files are hidden by Header File Macros , loaded by ft2build.h . The API documentation always gives the header macro name needed for a particular function.","title":"Synopsis"},{"location":"ft2-incremental.html","text":"FreeType Docs Miscellaneous Incremental Loading Incremental Loading Synopsis This section contains various functions used to perform so-called incremental glyph loading. This is a mode where all glyphs loaded from a given FT_Face are provided by the client application. Apart from that, all other tables are loaded normally from the font file. This mode is useful when FreeType is used within another engine, e.g., a PostScript Imaging Processor. To enable this mode, you must use FT_Open_Face , passing an FT_Parameter with the FT_PARAM_TAG_INCREMENTAL tag and an FT_Incremental_Interface value. See the comments for FT_Incremental_InterfaceRec for an example. FT_Incremental Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef struct FT_IncrementalRec_* FT_Incremental ; An opaque type describing a user-provided object used to implement incremental glyph loading within FreeType. This is used to support embedded fonts in certain environments (e.g., PostScript interpreters), where the glyph data isn't in the font file, or must be overridden by different values. note It is up to client applications to create and implement FT_Incremental objects, as long as they provide implementations for the methods FT_Incremental_GetGlyphDataFunc , FT_Incremental_FreeGlyphDataFunc and FT_Incremental_GetGlyphMetricsFunc . See the description of FT_Incremental_InterfaceRec to understand how to use incremental objects with FreeType. FT_Incremental_MetricsRec Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef struct FT_Incremental_MetricsRec_ { FT_Long bearing_x; FT_Long bearing_y; FT_Long advance; FT_Long advance_v; /* since 2.3.12 */ } FT_Incremental_MetricsRec ; A small structure used to contain the basic glyph metrics returned by the FT_Incremental_GetGlyphMetricsFunc method. fields bearing_x Left bearing, in font units. bearing_y Top bearing, in font units. advance Horizontal component of glyph advance, in font units. advance_v Vertical component of glyph advance, in font units. note These correspond to horizontal or vertical metrics depending on the value of the vertical argument to the function FT_Incremental_GetGlyphMetricsFunc . FT_Incremental_Metrics Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef struct FT_Incremental_MetricsRec_* FT_Incremental_Metrics ; A handle to an FT_Incremental_MetricsRec structure. FT_Incremental_GetGlyphDataFunc Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef FT_Error (* FT_Incremental_GetGlyphDataFunc )( FT_Incremental incremental, FT_UInt glyph_index, FT_Data * adata ); A function called by FreeType to access a given glyph's data bytes during FT_Load_Glyph or FT_Load_Char if incremental loading is enabled. Note that the format of the glyph's data bytes depends on the font file format. For TrueType, it must correspond to the raw bytes within the glyf table. For PostScript formats, it must correspond to the unencrypted charstring bytes, without any lenIV header. It is undefined for any other format. input incremental Handle to an opaque FT_Incremental handle provided by the client application. glyph_index Index of relevant glyph. output adata A structure describing the returned glyph data bytes (which will be accessed as a read-only byte block). return FreeType error code. 0 means success. note If this function returns successfully the method FT_Incremental_FreeGlyphDataFunc will be called later to release the data bytes. Nested calls to FT_Incremental_GetGlyphDataFunc can happen for compound glyphs. FT_Incremental_FreeGlyphDataFunc Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef void (* FT_Incremental_FreeGlyphDataFunc )( FT_Incremental incremental, FT_Data * data ); A function used to release the glyph data bytes returned by a successful call to FT_Incremental_GetGlyphDataFunc . input incremental A handle to an opaque FT_Incremental handle provided by the client application. data A structure describing the glyph data bytes (which will be accessed as a read-only byte block). FT_Incremental_GetGlyphMetricsFunc Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef FT_Error (* FT_Incremental_GetGlyphMetricsFunc ) ( FT_Incremental incremental, FT_UInt glyph_index, FT_Bool vertical, FT_Incremental_MetricsRec *ametrics ); A function used to retrieve the basic metrics of a given glyph index before accessing its data. This is necessary because, in certain formats like TrueType, the metrics are stored in a different place from the glyph images proper. input incremental A handle to an opaque FT_Incremental handle provided by the client application. glyph_index Index of relevant glyph. vertical If true, return vertical metrics. ametrics This parameter is used for both input and output. The original glyph metrics, if any, in font units. If metrics are not available all the values must be set to zero. output ametrics The replacement glyph metrics in font units. FT_Incremental_FuncsRec Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef struct FT_Incremental_FuncsRec_ { FT_Incremental_GetGlyphDataFunc get_glyph_data; FT_Incremental_FreeGlyphDataFunc free_glyph_data; FT_Incremental_GetGlyphMetricsFunc get_glyph_metrics; } FT_Incremental_FuncsRec ; A table of functions for accessing fonts that load data incrementally. Used in FT_Incremental_InterfaceRec . fields get_glyph_data The function to get glyph data. Must not be null. free_glyph_data The function to release glyph data. Must not be null. get_glyph_metrics The function to get glyph metrics. May be null if the font does not provide overriding glyph metrics. FT_Incremental_InterfaceRec Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef struct FT_Incremental_InterfaceRec_ { const FT_Incremental_FuncsRec * funcs; FT_Incremental object; } FT_Incremental_InterfaceRec ; A structure to be used with FT_Open_Face to indicate that the user wants to support incremental glyph loading. You should use it with FT_PARAM_TAG_INCREMENTAL as in the following example: FT_Incremental_InterfaceRec inc_int; FT_Parameter parameter; FT_Open_Args open_args; // set up incremental descriptor inc_int.funcs = my_funcs; inc_int.object = my_object; // set up optional parameter parameter.tag = FT_PARAM_TAG_INCREMENTAL; parameter.data = inc_int; // set up FT_Open_Args structure open_args.flags = FT_OPEN_PATHNAME | FT_OPEN_PARAMS; open_args.pathname = my_font_pathname; open_args.num_params = 1; open_args.params = parameter; // we use one optional argument // open the font error = FT_Open_Face( library, open_args, index, face ); ... FT_Incremental_Interface Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef FT_Incremental_InterfaceRec * FT_Incremental_Interface ; A pointer to an FT_Incremental_InterfaceRec structure.","title":"Incremental Loading"},{"location":"ft2-incremental.html#incremental-loading","text":"","title":"Incremental Loading"},{"location":"ft2-incremental.html#synopsis","text":"This section contains various functions used to perform so-called incremental glyph loading. This is a mode where all glyphs loaded from a given FT_Face are provided by the client application. Apart from that, all other tables are loaded normally from the font file. This mode is useful when FreeType is used within another engine, e.g., a PostScript Imaging Processor. To enable this mode, you must use FT_Open_Face , passing an FT_Parameter with the FT_PARAM_TAG_INCREMENTAL tag and an FT_Incremental_Interface value. 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Used in FT_Incremental_InterfaceRec .","title":"FT_Incremental_FuncsRec"},{"location":"ft2-incremental.html#ft_incremental_interfacerec","text":"Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef struct FT_Incremental_InterfaceRec_ { const FT_Incremental_FuncsRec * funcs; FT_Incremental object; } FT_Incremental_InterfaceRec ; A structure to be used with FT_Open_Face to indicate that the user wants to support incremental glyph loading. You should use it with FT_PARAM_TAG_INCREMENTAL as in the following example: FT_Incremental_InterfaceRec inc_int; FT_Parameter parameter; FT_Open_Args open_args; // set up incremental descriptor inc_int.funcs = my_funcs; inc_int.object = my_object; // set up optional parameter parameter.tag = FT_PARAM_TAG_INCREMENTAL; parameter.data = inc_int; // set up FT_Open_Args structure open_args.flags = FT_OPEN_PATHNAME | FT_OPEN_PARAMS; open_args.pathname = my_font_pathname; open_args.num_params = 1; open_args.params = parameter; // we use one optional argument // open the font error = FT_Open_Face( library, open_args, index, face ); ...","title":"FT_Incremental_InterfaceRec"},{"location":"ft2-incremental.html#ft_incremental_interface","text":"Defined in FT_INCREMENTAL_H (freetype/ftincrem.h). typedef FT_Incremental_InterfaceRec * FT_Incremental_Interface ; A pointer to an FT_Incremental_InterfaceRec structure.","title":"FT_Incremental_Interface"},{"location":"ft2-index.html","text":"FreeType Docs Global Index FreeType-2.10.0 API Reference B BDF_Property BDF_PROPERTY_TYPE_ATOM BDF_PROPERTY_TYPE_CARDINAL BDF_PROPERTY_TYPE_INTEGER BDF_PROPERTY_TYPE_NONE BDF_PropertyRec BDF_PropertyType C CID_FaceDict CID_FaceDictRec CID_FaceInfo CID_FaceInfoRec CID_FontDict CID_Info D darkening-parameters default-script F fallback-script FREETYPE_MAJOR FREETYPE_MINOR FREETYPE_PATCH FREETYPE_XXX FT_Activate_Size FT_Add_Default_Modules FT_Add_Module FT_ADVANCE_FLAG_FAST_ONLY FT_ADVANCES_H FT_Alloc_Func FT_Angle FT_ANGLE_2PI FT_Angle_Diff FT_ANGLE_PI FT_ANGLE_PI2 FT_ANGLE_PI4 FT_Atan2 FT_Attach_File FT_Attach_Stream FT_AUTOHINTER_H FT_AUTOHINTER_SCRIPT_CJK FT_AUTOHINTER_SCRIPT_INDIC FT_AUTOHINTER_SCRIPT_LATIN FT_AUTOHINTER_SCRIPT_NONE FT_AUTOHINTER_SCRIPT_XXX FT_BBox FT_BBOX_H FT_BDF_H FT_Bitmap FT_Bitmap_Blend FT_Bitmap_Convert FT_Bitmap_Copy FT_Bitmap_Done FT_Bitmap_Embolden FT_BITMAP_H FT_Bitmap_Init FT_Bitmap_Size FT_BitmapGlyph FT_BitmapGlyphRec FT_Bool FT_Byte FT_Bytes FT_BZIP2_H FT_CACHE_H FT_CeilFix FT_CFF_DRIVER_H FT_Char FT_CharMap FT_CharMapRec FT_CID_H FT_ClassicKern_Free FT_ClassicKern_Validate FT_Color FT_COLOR_H FT_CONFIG_CONFIG_H FT_CONFIG_MODULES_H FT_CONFIG_OPTIONS_H FT_CONFIG_STANDARD_LIBRARY_H FT_Cos FT_Data FT_DEBUG_HOOK_TRUETYPE FT_DEBUG_HOOK_XXX FT_DebugHook_Func FT_DivFix FT_Done_Face FT_Done_FreeType FT_Done_Glyph FT_Done_Library FT_Done_MM_Var FT_Done_Size FT_Driver FT_DRIVER_H FT_ENC_TAG FT_Encoding FT_ENCODING_ADOBE_CUSTOM FT_ENCODING_ADOBE_EXPERT FT_ENCODING_ADOBE_LATIN_1 FT_ENCODING_ADOBE_STANDARD FT_ENCODING_APPLE_ROMAN FT_ENCODING_BIG5 FT_ENCODING_JOHAB FT_ENCODING_MS_BIG5 FT_ENCODING_MS_GB2312 FT_ENCODING_MS_JOHAB FT_ENCODING_MS_SJIS FT_ENCODING_MS_SYMBOL FT_ENCODING_MS_WANSUNG FT_ENCODING_NONE FT_ENCODING_OLD_LATIN_2 FT_ENCODING_PRC FT_ENCODING_SJIS FT_ENCODING_UNICODE FT_ENCODING_WANSUNG FT_Err_XXX FT_Error FT_Error_String FT_ERRORS_H FT_F26Dot6 FT_F2Dot14 FT_Face FT_Face_CheckTrueTypePatents FT_FACE_FLAG_CID_KEYED FT_FACE_FLAG_COLOR FT_FACE_FLAG_EXTERNAL_STREAM FT_FACE_FLAG_FAST_GLYPHS FT_FACE_FLAG_FIXED_SIZES FT_FACE_FLAG_FIXED_WIDTH FT_FACE_FLAG_GLYPH_NAMES FT_FACE_FLAG_HINTER FT_FACE_FLAG_HORIZONTAL FT_FACE_FLAG_KERNING FT_FACE_FLAG_MULTIPLE_MASTERS FT_FACE_FLAG_SCALABLE FT_FACE_FLAG_SFNT FT_FACE_FLAG_TRICKY FT_FACE_FLAG_VARIATION FT_FACE_FLAG_VERTICAL FT_FACE_FLAG_XXX FT_Face_GetCharsOfVariant FT_Face_GetCharVariantIndex FT_Face_GetCharVariantIsDefault FT_Face_GetVariantSelectors FT_Face_GetVariantsOfChar FT_Face_Internal FT_Face_Properties FT_Face_SetUnpatentedHinting FT_FaceRec FT_Fixed FT_FloorFix FT_FONT_FORMATS_H FT_Free_Func FT_FREETYPE_H FT_FSTYPE_BITMAP_EMBEDDING_ONLY FT_FSTYPE_EDITABLE_EMBEDDING FT_FSTYPE_INSTALLABLE_EMBEDDING FT_FSTYPE_NO_SUBSETTING FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING FT_FSTYPE_XXX FT_FWord FT_GASP_DO_GRAY FT_GASP_DO_GRIDFIT FT_GASP_H FT_GASP_NO_TABLE FT_GASP_SYMMETRIC_GRIDFIT FT_GASP_SYMMETRIC_SMOOTHING FT_GASP_XXX FT_Generic FT_Generic_Finalizer FT_Get_Advance FT_Get_Advances FT_Get_BDF_Charset_ID FT_Get_BDF_Property FT_Get_Char_Index FT_Get_Charmap_Index FT_Get_CID_From_Glyph_Index FT_Get_CID_Is_Internally_CID_Keyed FT_Get_CID_Registry_Ordering_Supplement FT_Get_CMap_Format FT_Get_CMap_Language_ID FT_Get_Color_Glyph_Layer FT_Get_First_Char FT_Get_Font_Format FT_Get_FSType_Flags FT_Get_Gasp FT_Get_Glyph FT_Get_Glyph_Name FT_Get_Kerning FT_Get_MM_Blend_Coordinates FT_Get_MM_Var FT_Get_MM_WeightVector FT_Get_Module FT_Get_Multi_Master FT_Get_Name_Index FT_Get_Next_Char FT_Get_PFR_Advance FT_Get_PFR_Kerning FT_Get_PFR_Metrics FT_Get_Postscript_Name FT_Get_PS_Font_Info FT_Get_PS_Font_Private FT_Get_PS_Font_Value FT_Get_Renderer FT_Get_Sfnt_LangTag FT_Get_Sfnt_Name FT_Get_Sfnt_Name_Count FT_Get_Sfnt_Table FT_Get_SubGlyph_Info FT_Get_Track_Kerning FT_Get_TrueType_Engine_Type FT_Get_Var_Axis_Flags FT_Get_Var_Blend_Coordinates FT_Get_Var_Design_Coordinates FT_Get_WinFNT_Header FT_GetFile_From_Mac_ATS_Name FT_GetFile_From_Mac_Name FT_GetFilePath_From_Mac_ATS_Name FT_Glyph FT_GLYPH_BBOX_GRIDFIT FT_Glyph_BBox_Mode FT_GLYPH_BBOX_PIXELS FT_GLYPH_BBOX_SUBPIXELS FT_GLYPH_BBOX_TRUNCATE FT_GLYPH_BBOX_UNSCALED FT_Glyph_Copy FT_Glyph_Format FT_GLYPH_FORMAT_BITMAP FT_GLYPH_FORMAT_COMPOSITE FT_GLYPH_FORMAT_NONE FT_GLYPH_FORMAT_OUTLINE FT_GLYPH_FORMAT_PLOTTER FT_Glyph_Get_CBox FT_GLYPH_H FT_Glyph_Metrics FT_Glyph_Stroke FT_Glyph_StrokeBorder FT_Glyph_To_Bitmap FT_Glyph_Transform FT_GlyphRec FT_GlyphSlot FT_GlyphSlot_Own_Bitmap FT_GlyphSlotRec FT_GX_VALIDATE_H FT_GZIP_H FT_Gzip_Uncompress FT_HAS_COLOR FT_HAS_FAST_GLYPHS FT_HAS_FIXED_SIZES FT_HAS_GLYPH_NAMES FT_HAS_HORIZONTAL FT_HAS_KERNING FT_HAS_MULTIPLE_MASTERS FT_Has_PS_Glyph_Names FT_HAS_VERTICAL FT_HINTING_ADOBE FT_HINTING_FREETYPE FT_HINTING_XXX FT_IMAGE_H FT_IMAGE_TAG FT_Incremental FT_Incremental_FreeGlyphDataFunc FT_Incremental_FuncsRec FT_Incremental_GetGlyphDataFunc FT_Incremental_GetGlyphMetricsFunc FT_INCREMENTAL_H FT_Incremental_Interface FT_Incremental_InterfaceRec FT_Incremental_Metrics FT_Incremental_MetricsRec FT_Init_FreeType FT_Int FT_Int16 FT_Int32 FT_Int64 FT_IS_CID_KEYED FT_IS_FIXED_WIDTH FT_IS_NAMED_INSTANCE FT_IS_SCALABLE FT_IS_SFNT FT_IS_TRICKY FT_IS_VARIATION FT_KERNING_DEFAULT FT_Kerning_Mode FT_KERNING_UNFITTED FT_KERNING_UNSCALED FT_LayerIterator FT_LCD_FILTER_DEFAULT FT_LCD_FILTER_H FT_LCD_FILTER_LEGACY FT_LCD_FILTER_LEGACY1 FT_LCD_FILTER_LIGHT FT_LCD_FILTER_NONE FT_LcdFilter FT_LcdFiveTapFilter FT_Library FT_Library_SetLcdFilter FT_Library_SetLcdFilterWeights FT_Library_SetLcdGeometry FT_Library_Version FT_List FT_List_Add FT_List_Destructor FT_List_Finalize FT_List_Find FT_LIST_H FT_List_Insert FT_List_Iterate FT_List_Iterator FT_List_Remove FT_List_Up FT_ListNode FT_ListNodeRec FT_ListRec FT_LOAD_BITMAP_METRICS_ONLY FT_Load_Char FT_LOAD_COLOR FT_LOAD_COMPUTE_METRICS FT_LOAD_CROP_BITMAP FT_LOAD_DEFAULT FT_LOAD_FORCE_AUTOHINT FT_Load_Glyph FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH FT_LOAD_IGNORE_TRANSFORM FT_LOAD_LINEAR_DESIGN FT_LOAD_MONOCHROME FT_LOAD_NO_AUTOHINT FT_LOAD_NO_BITMAP FT_LOAD_NO_HINTING FT_LOAD_NO_RECURSE FT_LOAD_NO_SCALE FT_LOAD_PEDANTIC FT_LOAD_RENDER FT_Load_Sfnt_Table FT_LOAD_TARGET_LCD FT_LOAD_TARGET_LCD_V FT_LOAD_TARGET_LIGHT FT_LOAD_TARGET_MODE FT_LOAD_TARGET_MONO FT_LOAD_TARGET_NORMAL FT_LOAD_TARGET_XXX FT_LOAD_VERTICAL_LAYOUT FT_LOAD_XXX FT_Long FT_LZW_H FT_MAC_H FT_MAKE_TAG FT_Matrix FT_Matrix_Invert FT_Matrix_Multiply FT_Memory FT_MemoryRec FT_MM_Axis FT_MM_Var FT_Module FT_Module_Class FT_Module_Constructor FT_Module_Destructor FT_MODULE_ERRORS_H FT_MODULE_H FT_Module_Requester FT_MulDiv FT_MulFix FT_Multi_Master FT_MULTIPLE_MASTERS_H FT_New_Face FT_New_Face_From_FOND FT_New_Face_From_FSRef FT_New_Face_From_FSSpec FT_New_Glyph FT_New_Library FT_New_Memory_Face FT_New_Size FT_Offset FT_Open_Args FT_OPEN_DRIVER FT_Open_Face FT_OPEN_MEMORY FT_OPEN_PARAMS FT_OPEN_PATHNAME FT_OPEN_STREAM FT_OPEN_XXX FT_OpenType_Free FT_OpenType_Validate FT_OPENTYPE_VALIDATE_H FT_Orientation FT_ORIENTATION_FILL_LEFT FT_ORIENTATION_FILL_RIGHT FT_ORIENTATION_NONE FT_ORIENTATION_POSTSCRIPT FT_ORIENTATION_TRUETYPE FT_Outline FT_Outline_Check FT_Outline_ConicToFunc FT_Outline_Copy FT_Outline_CubicToFunc FT_Outline_Decompose FT_Outline_Done FT_Outline_Embolden FT_Outline_EmboldenXY FT_OUTLINE_EVEN_ODD_FILL FT_Outline_Funcs FT_Outline_Get_BBox FT_Outline_Get_Bitmap FT_Outline_Get_CBox FT_Outline_Get_Orientation FT_Outline_GetInsideBorder FT_Outline_GetOutsideBorder FT_OUTLINE_H FT_OUTLINE_HIGH_PRECISION FT_OUTLINE_IGNORE_DROPOUTS FT_OUTLINE_INCLUDE_STUBS FT_Outline_LineToFunc FT_Outline_MoveToFunc FT_Outline_New FT_OUTLINE_NONE FT_OUTLINE_OWNER FT_Outline_Render FT_Outline_Reverse FT_OUTLINE_REVERSE_FILL FT_OUTLINE_SINGLE_PASS FT_OUTLINE_SMART_DROPOUTS FT_Outline_Transform FT_Outline_Translate FT_OUTLINE_XXX FT_OutlineGlyph FT_OutlineGlyphRec FT_Palette_Data FT_Palette_Data_Get FT_PALETTE_FOR_DARK_BACKGROUND FT_PALETTE_FOR_LIGHT_BACKGROUND FT_Palette_Select FT_Palette_Set_Foreground_Color FT_PALETTE_XXX FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY FT_PARAM_TAG_INCREMENTAL FT_PARAM_TAG_LCD_FILTER_WEIGHTS FT_PARAM_TAG_RANDOM_SEED FT_PARAM_TAG_STEM_DARKENING FT_PARAM_TAG_UNPATENTED_HINTING FT_Parameter FT_PCF_DRIVER_H FT_PFR_H FT_Pixel_Mode FT_PIXEL_MODE_BGRA FT_PIXEL_MODE_GRAY FT_PIXEL_MODE_GRAY2 FT_PIXEL_MODE_GRAY4 FT_PIXEL_MODE_LCD FT_PIXEL_MODE_LCD_V FT_PIXEL_MODE_MONO FT_PIXEL_MODE_NONE FT_Pointer FT_Pos FT_Prop_GlyphToScriptMap FT_Prop_IncreaseXHeight FT_Property_Get FT_Property_Set FT_PtrDist FT_Raster FT_Raster_BitSet_Func FT_Raster_BitTest_Func FT_Raster_DoneFunc FT_RASTER_FLAG_AA FT_RASTER_FLAG_CLIP FT_RASTER_FLAG_DEFAULT FT_RASTER_FLAG_DIRECT FT_RASTER_FLAG_XXX FT_Raster_Funcs FT_Raster_NewFunc FT_Raster_Params FT_Raster_RenderFunc FT_Raster_ResetFunc FT_Raster_SetModeFunc FT_Realloc_Func FT_Reference_Face FT_Reference_Library FT_Remove_Module FT_Render_Glyph FT_RENDER_H FT_Render_Mode FT_RENDER_MODE_LCD FT_RENDER_MODE_LCD_V FT_RENDER_MODE_LIGHT FT_RENDER_MODE_MONO FT_RENDER_MODE_NORMAL FT_Renderer FT_Renderer_Class FT_Request_Size FT_RoundFix FT_Select_Charmap FT_Select_Size FT_Set_Char_Size FT_Set_Charmap FT_Set_Debug_Hook FT_Set_Default_Properties FT_Set_MM_Blend_Coordinates FT_Set_MM_Design_Coordinates FT_Set_MM_WeightVector FT_Set_Named_Instance FT_Set_Pixel_Sizes FT_Set_Renderer FT_Set_Transform FT_Set_Var_Blend_Coordinates FT_Set_Var_Design_Coordinates FT_SFNT_HEAD FT_SFNT_HHEA FT_SFNT_MAXP FT_SFNT_NAMES_H FT_SFNT_OS2 FT_SFNT_PCLT FT_SFNT_POST FT_Sfnt_Table_Info FT_Sfnt_Tag FT_SFNT_VHEA FT_SfntLangTag FT_SfntName FT_Short FT_Sin FT_Size FT_Size_Internal FT_Size_Metrics FT_Size_Request FT_Size_Request_Type FT_SIZE_REQUEST_TYPE_BBOX FT_SIZE_REQUEST_TYPE_CELL FT_SIZE_REQUEST_TYPE_NOMINAL FT_SIZE_REQUEST_TYPE_REAL_DIM FT_SIZE_REQUEST_TYPE_SCALES FT_Size_RequestRec FT_SizeRec FT_SIZES_H FT_Slot_Internal FT_Span FT_SpanFunc FT_Stream FT_Stream_CloseFunc FT_Stream_IoFunc FT_Stream_OpenBzip2 FT_Stream_OpenGzip FT_Stream_OpenLZW FT_StreamDesc FT_StreamRec FT_String FT_Stroker FT_Stroker_BeginSubPath FT_STROKER_BORDER_LEFT FT_STROKER_BORDER_RIGHT FT_Stroker_ConicTo FT_Stroker_CubicTo FT_Stroker_Done FT_Stroker_EndSubPath FT_Stroker_Export FT_Stroker_ExportBorder FT_Stroker_GetBorderCounts FT_Stroker_GetCounts FT_STROKER_H FT_Stroker_LineCap FT_STROKER_LINECAP_BUTT FT_STROKER_LINECAP_ROUND FT_STROKER_LINECAP_SQUARE FT_Stroker_LineJoin FT_STROKER_LINEJOIN_BEVEL FT_STROKER_LINEJOIN_MITER FT_STROKER_LINEJOIN_MITER_FIXED FT_STROKER_LINEJOIN_MITER_VARIABLE FT_STROKER_LINEJOIN_ROUND FT_Stroker_LineTo FT_Stroker_New FT_Stroker_ParseOutline FT_Stroker_Rewind FT_Stroker_Set FT_StrokerBorder FT_STYLE_FLAG_BOLD FT_STYLE_FLAG_ITALIC FT_STYLE_FLAG_XXX FT_SubGlyph FT_SUBGLYPH_FLAG_2X2 FT_SUBGLYPH_FLAG_ARGS_ARE_WORDS FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES 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FT_LayerIterator Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_LayerIterator_ { FT_UInt num_layers; FT_UInt layer; FT_Byte * p; } FT_LayerIterator ; This iterator object is needed for FT_Get_Color_Glyph_Layer . fields num_layers The number of glyph layers for the requested glyph index. Will be set by FT_Get_Color_Glyph_Layer . layer The current layer. Will be set by FT_Get_Color_Glyph_Layer . p An opaque pointer into COLR table data. The caller must set this to NULL before the first call of FT_Get_Color_Glyph_Layer . FT_Get_Color_Glyph_Layer Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Bool ) FT_Get_Color_Glyph_Layer ( FT_Face face, FT_UInt base_glyph, FT_UInt *aglyph_index, FT_UInt *acolor_index, FT_LayerIterator * iterator ); This is an interface to the COLR table in OpenType fonts to iteratively retrieve the colored glyph layers associated with the current glyph slot. https://docs.microsoft.com/en-us/typography/opentype/spec/colr The glyph layer data for a given glyph index, if present, provides an alternative, multi-colour glyph representation: Instead of rendering the outline or bitmap with the given glyph index, glyphs with the indices and colors returned by this function are rendered layer by layer. The returned elements are ordered in the z direction from bottom to top; the 'n'th element should be rendered with the associated palette color and blended on top of the already rendered layers (elements 0, 1, ..., n-1). input face A handle to the parent face object. base_glyph The glyph index the colored glyph layers are associated with. inout iterator An FT_LayerIterator object. For the first call you should set iterator- p to NULL . For all following calls, simply use the same object again. output aglyph_index The glyph index of the current layer. acolor_index The color index into the font face's color palette of the current layer. The value 0xFFFF is special; it doesn't reference a palette entry but indicates that the text foreground color should be used instead (to be set up by the application outside of FreeType). The color palette can be retrieved with FT_Palette_Select . return Value 1 if everything is OK. If there are no more layers (or if there are no layers at all), value 0 gets returned. In case of an error, value 0 is returned also. note This function is necessary if you want to handle glyph layers by yourself. In particular, functions that operate with FT_GlyphRec objects (like FT_Get_Glyph or FT_Glyph_To_Bitmap ) don't have access to this information. Note that FT_Render_Glyph is able to handle colored glyph layers automatically if the FT_LOAD_COLOR flag is passed to a previous call to FT_Load_Glyph . [This is an experimental feature.] example FT_Color* palette; FT_LayerIterator iterator; FT_Bool have_layers; FT_UInt layer_glyph_index; FT_UInt layer_color_index; error = FT_Palette_Select( face, palette_index, palette ); if ( error ) palette = NULL; iterator.p = NULL; have_layers = FT_Get_Color_Glyph_Layer( face, glyph_index, layer_glyph_index, layer_color_index, iterator ); if ( palette have_layers ) { do { FT_Color layer_color; if ( layer_color_index == 0xFFFF ) layer_color = text_foreground_color; else layer_color = palette[layer_color_index]; // Load and render glyph `layer_glyph_index , then // blend resulting pixmap (using color `layer_color ) // with previously created pixmaps. } while ( FT_Get_Color_Glyph_Layer( face, glyph_index, layer_glyph_index, layer_color_index, iterator ) ); }","title":"Glyph Layer Management"},{"location":"ft2-layer_management.html#glyph-layer-management","text":"","title":"Glyph Layer Management"},{"location":"ft2-layer_management.html#synopsis","text":"The functions described here allow access of colored glyph layer data in OpenType's COLR tables.","title":"Synopsis"},{"location":"ft2-layer_management.html#ft_layeriterator","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_LayerIterator_ { FT_UInt num_layers; FT_UInt layer; FT_Byte * p; } FT_LayerIterator ; This iterator object is needed for FT_Get_Color_Glyph_Layer .","title":"FT_LayerIterator"},{"location":"ft2-layer_management.html#ft_get_color_glyph_layer","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Bool ) FT_Get_Color_Glyph_Layer ( FT_Face face, FT_UInt base_glyph, FT_UInt *aglyph_index, FT_UInt *acolor_index, FT_LayerIterator * iterator ); This is an interface to the COLR table in OpenType fonts to iteratively retrieve the colored glyph layers associated with the current glyph slot. https://docs.microsoft.com/en-us/typography/opentype/spec/colr The glyph layer data for a given glyph index, if present, provides an alternative, multi-colour glyph representation: Instead of rendering the outline or bitmap with the given glyph index, glyphs with the indices and colors returned by this function are rendered layer by layer. The returned elements are ordered in the z direction from bottom to top; the 'n'th element should be rendered with the associated palette color and blended on top of the already rendered layers (elements 0, 1, ..., n-1).","title":"FT_Get_Color_Glyph_Layer"},{"location":"ft2-lcd_rendering.html","text":"FreeType Docs Controlling FreeType Modules Subpixel Rendering Subpixel Rendering Synopsis FreeType provides two alternative subpixel rendering technologies. Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your ftoption.h file, this enables patented ClearType-style rendering. Otherwise, Harmony LCD rendering is enabled. These technologies are controlled differently and API described below, although always available, performs its function when appropriate method is enabled and does nothing otherwise. ClearType-style LCD rendering exploits the color-striped structure of LCD pixels, increasing the available resolution in the direction of the stripe (usually horizontal RGB) by a factor of 3. Using the subpixels coverages unfiltered can create severe color fringes especially when rendering thin features. Indeed, to produce black-on-white text, the nearby color subpixels must be dimmed equally. A good 5-tap FIR filter should be applied to subpixel coverages regardless of pixel boundaries and should have these properties: It should be symmetrical, like { a, b, c, b, a }, to avoid any shifts in appearance. It should be color-balanced, meaning a + b = c, to reduce color fringes by distributing the computed coverage for one subpixel to all subpixels equally. It should be normalized, meaning 2a + 2b + c = 1.0 to maintain overall brightness. Boxy 3-tap filter {0, , , , 0} is sharper but is less forgiving of non-ideal gamma curves of a screen (and viewing angles), beveled filters are fuzzier but more tolerant. Use the FT_Library_SetLcdFilter or FT_Library_SetLcdFilterWeights API to specify a low-pass filter, which is then applied to subpixel-rendered bitmaps generated through FT_Render_Glyph . Harmony LCD rendering is suitable to panels with any regular subpixel structure, not just monitors with 3 color striped subpixels, as long as the color subpixels have fixed positions relative to the pixel center. In this case, each color channel is then rendered separately after shifting the outline opposite to the subpixel shift so that the coverage maps are aligned. This method is immune to color fringes because the shifts do not change integral coverage. The subpixel geometry must be specified by xy-coordinates for each subpixel. By convention they may come in the RGB order: {{- , 0}, {0, 0}, { , 0}} for standard RGB striped panel or {{- , }, {- , - }, { , 0}} for a certain PenTile panel. Use the FT_Library_SetLcdGeometry API to specify subpixel positions. If one follows the RGB order convention, the same order applies to the resulting FT_PIXEL_MODE_LCD and FT_PIXEL_MODE_LCD_V bitmaps. Note, however, that the coordinate frame for the latter must be rotated clockwise. Harmony with default LCD geometry is equivalent to ClearType with light filter. As a result of ClearType filtering or Harmony rendering, the dimensions of LCD bitmaps can be either wider or taller than the dimensions of the corresponding outline with regard to the pixel grid. For example, for FT_RENDER_MODE_LCD , the filter adds 2 subpixels to the left, and 2 subpixels to the right. The bitmap offset values are adjusted accordingly, so clients shouldn't need to modify their layout and glyph positioning code when enabling the filter. The ClearType and Harmony rendering is applicable to glyph bitmaps rendered through FT_Render_Glyph , FT_Load_Glyph , FT_Load_Char , and FT_Glyph_To_Bitmap , when FT_RENDER_MODE_LCD or FT_RENDER_MODE_LCD_V is specified. This API does not control FT_Outline_Render and FT_Outline_Get_Bitmap . The described algorithms can completely remove color artefacts when combined with gamma-corrected alpha blending in linear space. Each of the 3 alpha values (subpixels) must by independently used to blend one color channel. That is, red alpha blends the red channel of the text color with the red channel of the background pixel. FT_LcdFilter Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). typedef enum FT_LcdFilter_ { FT_LCD_FILTER_NONE = 0, FT_LCD_FILTER_DEFAULT = 1, FT_LCD_FILTER_LIGHT = 2, FT_LCD_FILTER_LEGACY1 = 3, FT_LCD_FILTER_LEGACY = 16, FT_LCD_FILTER_MAX /* do not remove */ } FT_LcdFilter ; A list of values to identify various types of LCD filters. values FT_LCD_FILTER_NONE Do not perform filtering. When used with subpixel rendering, this results in sometimes severe color fringes. FT_LCD_FILTER_DEFAULT This is a beveled, normalized, and color-balanced five-tap filter with weights of [0x08 0x4D 0x56 0x4D 0x08] in 1/256th units. FT_LCD_FILTER_LIGHT this is a boxy, normalized, and color-balanced three-tap filter with weights of [0x00 0x55 0x56 0x55 0x00] in 1/256th units. FT_LCD_FILTER_LEGACY FT_LCD_FILTER_LEGACY1 This filter corresponds to the original libXft color filter. It provides high contrast output but can exhibit really bad color fringes if glyphs are not extremely well hinted to the pixel grid. This filter is only provided for comparison purposes, and might be disabled or stay unsupported in the future. The second value is provided for compatibility with FontConfig, which historically used different enumeration, sometimes incorrectly forwarded to FreeType. since 2.3.0 ( FT_LCD_FILTER_LEGACY1 since 2.6.2) FT_Library_SetLcdFilter Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). FT_EXPORT( FT_Error ) FT_Library_SetLcdFilter ( FT_Library library, FT_LcdFilter filter ); This function is used to apply color filtering to LCD decimated bitmaps, like the ones used when calling FT_Render_Glyph with FT_RENDER_MODE_LCD or FT_RENDER_MODE_LCD_V . input library A handle to the target library instance. filter The filter type. You can use FT_LCD_FILTER_NONE here to disable this feature, or FT_LCD_FILTER_DEFAULT to use a default filter that should work well on most LCD screens. return FreeType error code. 0 means success. note This feature is always disabled by default. Clients must make an explicit call to this function with a filter value other than FT_LCD_FILTER_NONE in order to enable it. Due to PATENTS covering subpixel rendering, this function doesn't do anything except returning FT_Err_Unimplemented_Feature if the configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not defined in your build of the library, which should correspond to all default builds of FreeType. since 2.3.0 FT_Library_SetLcdFilterWeights Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). FT_EXPORT( FT_Error ) FT_Library_SetLcdFilterWeights ( FT_Library library, unsigned char *weights ); This function can be used to enable LCD filter with custom weights, instead of using presets in FT_Library_SetLcdFilter . input library A handle to the target library instance. weights A pointer to an array; the function copies the first five bytes and uses them to specify the filter weights in 1/256th units. return FreeType error code. 0 means success. note Due to PATENTS covering subpixel rendering, this function doesn't do anything except returning FT_Err_Unimplemented_Feature if the configuration macro FT_CONFIG_OPTION_SUBPIXEL_RENDERING is not defined in your build of the library, which should correspond to all default builds of FreeType. LCD filter weights can also be set per face using FT_Face_Properties with FT_PARAM_TAG_LCD_FILTER_WEIGHTS . since 2.4.0 FT_LcdFiveTapFilter Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). # define FT_LCD_FILTER_FIVE_TAPS 5 typedef FT_Byte FT_LcdFiveTapFilter [FT_LCD_FILTER_FIVE_TAPS]; A typedef for passing the five LCD filter weights to FT_Face_Properties within an FT_Parameter structure. since 2.8 FT_Library_SetLcdGeometry Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). FT_EXPORT( FT_Error ) FT_Library_SetLcdGeometry ( FT_Library library, FT_Vector sub[3] ); This function can be used to modify default positions of color subpixels, which controls Harmony LCD rendering. input library A handle to the target library instance. sub A pointer to an array of 3 vectors in 26.6 fractional pixel format; the function modifies the default values, see the note below. return FreeType error code. 0 means success. note Subpixel geometry examples: {{-21, 0}, {0, 0}, {21, 0}} is the default, corresponding to 3 color stripes shifted by a third of a pixel. This could be an RGB panel. {{21, 0}, {0, 0}, {-21, 0}} looks the same as the default but can specify a BGR panel instead, while keeping the bitmap in the same RGB888 format. {{0, 21}, {0, 0}, {0, -21}} is the vertical RGB, but the bitmap stays RGB888 as a result. {{-11, 16}, {-11, -16}, {22, 0}} is a certain PenTile arrangement. This function does nothing and returns FT_Err_Unimplemented_Feature in the context of ClearType-style subpixel rendering when FT_CONFIG_OPTION_SUBPIXEL_RENDERING is defined in your build of the library. since 2.10.0","title":"Subpixel Rendering"},{"location":"ft2-lcd_rendering.html#subpixel-rendering","text":"","title":"Subpixel Rendering"},{"location":"ft2-lcd_rendering.html#synopsis","text":"FreeType provides two alternative subpixel rendering technologies. Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your ftoption.h file, this enables patented ClearType-style rendering. Otherwise, Harmony LCD rendering is enabled. These technologies are controlled differently and API described below, although always available, performs its function when appropriate method is enabled and does nothing otherwise. ClearType-style LCD rendering exploits the color-striped structure of LCD pixels, increasing the available resolution in the direction of the stripe (usually horizontal RGB) by a factor of 3. Using the subpixels coverages unfiltered can create severe color fringes especially when rendering thin features. Indeed, to produce black-on-white text, the nearby color subpixels must be dimmed equally. A good 5-tap FIR filter should be applied to subpixel coverages regardless of pixel boundaries and should have these properties: It should be symmetrical, like { a, b, c, b, a }, to avoid any shifts in appearance. It should be color-balanced, meaning a + b = c, to reduce color fringes by distributing the computed coverage for one subpixel to all subpixels equally. It should be normalized, meaning 2a + 2b + c = 1.0 to maintain overall brightness. Boxy 3-tap filter {0, , , , 0} is sharper but is less forgiving of non-ideal gamma curves of a screen (and viewing angles), beveled filters are fuzzier but more tolerant. Use the FT_Library_SetLcdFilter or FT_Library_SetLcdFilterWeights API to specify a low-pass filter, which is then applied to subpixel-rendered bitmaps generated through FT_Render_Glyph . Harmony LCD rendering is suitable to panels with any regular subpixel structure, not just monitors with 3 color striped subpixels, as long as the color subpixels have fixed positions relative to the pixel center. In this case, each color channel is then rendered separately after shifting the outline opposite to the subpixel shift so that the coverage maps are aligned. This method is immune to color fringes because the shifts do not change integral coverage. The subpixel geometry must be specified by xy-coordinates for each subpixel. By convention they may come in the RGB order: {{- , 0}, {0, 0}, { , 0}} for standard RGB striped panel or {{- , }, {- , - }, { , 0}} for a certain PenTile panel. Use the FT_Library_SetLcdGeometry API to specify subpixel positions. If one follows the RGB order convention, the same order applies to the resulting FT_PIXEL_MODE_LCD and FT_PIXEL_MODE_LCD_V bitmaps. Note, however, that the coordinate frame for the latter must be rotated clockwise. Harmony with default LCD geometry is equivalent to ClearType with light filter. As a result of ClearType filtering or Harmony rendering, the dimensions of LCD bitmaps can be either wider or taller than the dimensions of the corresponding outline with regard to the pixel grid. For example, for FT_RENDER_MODE_LCD , the filter adds 2 subpixels to the left, and 2 subpixels to the right. The bitmap offset values are adjusted accordingly, so clients shouldn't need to modify their layout and glyph positioning code when enabling the filter. The ClearType and Harmony rendering is applicable to glyph bitmaps rendered through FT_Render_Glyph , FT_Load_Glyph , FT_Load_Char , and FT_Glyph_To_Bitmap , when FT_RENDER_MODE_LCD or FT_RENDER_MODE_LCD_V is specified. This API does not control FT_Outline_Render and FT_Outline_Get_Bitmap . The described algorithms can completely remove color artefacts when combined with gamma-corrected alpha blending in linear space. Each of the 3 alpha values (subpixels) must by independently used to blend one color channel. That is, red alpha blends the red channel of the text color with the red channel of the background pixel.","title":"Synopsis"},{"location":"ft2-lcd_rendering.html#ft_lcdfilter","text":"Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). typedef enum FT_LcdFilter_ { FT_LCD_FILTER_NONE = 0, FT_LCD_FILTER_DEFAULT = 1, FT_LCD_FILTER_LIGHT = 2, FT_LCD_FILTER_LEGACY1 = 3, FT_LCD_FILTER_LEGACY = 16, FT_LCD_FILTER_MAX /* do not remove */ } FT_LcdFilter ; A list of values to identify various types of LCD filters.","title":"FT_LcdFilter"},{"location":"ft2-lcd_rendering.html#ft_library_setlcdfilter","text":"Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). FT_EXPORT( FT_Error ) FT_Library_SetLcdFilter ( FT_Library library, FT_LcdFilter filter ); This function is used to apply color filtering to LCD decimated bitmaps, like the ones used when calling FT_Render_Glyph with FT_RENDER_MODE_LCD or FT_RENDER_MODE_LCD_V .","title":"FT_Library_SetLcdFilter"},{"location":"ft2-lcd_rendering.html#ft_library_setlcdfilterweights","text":"Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). FT_EXPORT( FT_Error ) FT_Library_SetLcdFilterWeights ( FT_Library library, unsigned char *weights ); This function can be used to enable LCD filter with custom weights, instead of using presets in FT_Library_SetLcdFilter .","title":"FT_Library_SetLcdFilterWeights"},{"location":"ft2-lcd_rendering.html#ft_lcdfivetapfilter","text":"Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). # define FT_LCD_FILTER_FIVE_TAPS 5 typedef FT_Byte FT_LcdFiveTapFilter [FT_LCD_FILTER_FIVE_TAPS]; A typedef for passing the five LCD filter weights to FT_Face_Properties within an FT_Parameter structure.","title":"FT_LcdFiveTapFilter"},{"location":"ft2-lcd_rendering.html#ft_library_setlcdgeometry","text":"Defined in FT_LCD_FILTER_H (freetype/ftlcdfil.h). FT_EXPORT( FT_Error ) FT_Library_SetLcdGeometry ( FT_Library library, FT_Vector sub[3] ); This function can be used to modify default positions of color subpixels, which controls Harmony LCD rendering.","title":"FT_Library_SetLcdGeometry"},{"location":"ft2-list_processing.html","text":"FreeType Docs Support API List Processing List Processing Synopsis This section contains various definitions related to list processing using doubly-linked nodes. FT_List Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListRec_* FT_List ; A handle to a list record (see FT_ListRec ). FT_ListNode Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListNodeRec_* FT_ListNode ; Many elements and objects in FreeType are listed through an FT_List record (see FT_ListRec ). As its name suggests, an FT_ListNode is a handle to a single list element. FT_ListRec Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListRec_ { FT_ListNode head; FT_ListNode tail; } FT_ListRec ; A structure used to hold a simple doubly-linked list. These are used in many parts of FreeType. fields head The head (first element) of doubly-linked list. tail The tail (last element) of doubly-linked list. FT_ListNodeRec Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListNodeRec_ { FT_ListNode prev; FT_ListNode next; void * data; } FT_ListNodeRec ; A structure used to hold a single list element. fields prev The previous element in the list. NULL if first. next The next element in the list. NULL if last. data A typeless pointer to the listed object. FT_List_Add Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Add ( FT_List list, FT_ListNode node ); Append an element to the end of a list. inout list A pointer to the parent list. node The node to append. FT_List_Insert Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Insert ( FT_List list, FT_ListNode node ); Insert an element at the head of a list. inout list A pointer to parent list. node The node to insert. FT_List_Find Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( FT_ListNode ) FT_List_Find ( FT_List list, void * data ); Find the list node for a given listed object. input list A pointer to the parent list. data The address of the listed object. return List node. NULL if it wasn't found. FT_List_Remove Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Remove ( FT_List list, FT_ListNode node ); Remove a node from a list. This function doesn't check whether the node is in the list! input node The node to remove. inout list A pointer to the parent list. FT_List_Up Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Up ( FT_List list, FT_ListNode node ); Move a node to the head/top of a list. Used to maintain LRU lists. inout list A pointer to the parent list. node The node to move. FT_List_Iterate Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( FT_Error ) FT_List_Iterate ( FT_List list, FT_List_Iterator iterator, void * user ); Parse a list and calls a given iterator function on each element. Note that parsing is stopped as soon as one of the iterator calls returns a non-zero value. input list A handle to the list. iterator An iterator function, called on each node of the list. user A user-supplied field that is passed as the second argument to the iterator. return The result (a FreeType error code) of the last iterator call. FT_List_Iterator Defined in FT_LIST_H (freetype/ftlist.h). typedef FT_Error (* FT_List_Iterator )( FT_ListNode node, void * user ); An FT_List iterator function that is called during a list parse by FT_List_Iterate . input node The current iteration list node. user A typeless pointer passed to FT_List_Iterate . Can be used to point to the iteration's state. FT_List_Finalize Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Finalize ( FT_List list, FT_List_Destructor destroy, FT_Memory memory, void * user ); Destroy all elements in the list as well as the list itself. input list A handle to the list. destroy A list destructor that will be applied to each element of the list. Set this to NULL if not needed. memory The current memory object that handles deallocation. user A user-supplied field that is passed as the last argument to the destructor. note This function expects that all nodes added by FT_List_Add or FT_List_Insert have been dynamically allocated. FT_List_Destructor Defined in FT_LIST_H (freetype/ftlist.h). typedef void (* FT_List_Destructor )( FT_Memory memory, void * data, void * user ); An FT_List iterator function that is called during a list finalization by FT_List_Finalize to destroy all elements in a given list. input system The current system object. data The current object to destroy. user A typeless pointer passed to FT_List_Iterate . It can be used to point to the iteration's state.","title":"List Processing"},{"location":"ft2-list_processing.html#list-processing","text":"","title":"List Processing"},{"location":"ft2-list_processing.html#synopsis","text":"This section contains various definitions related to list processing using doubly-linked nodes.","title":"Synopsis"},{"location":"ft2-list_processing.html#ft_list","text":"Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListRec_* FT_List ; A handle to a list record (see FT_ListRec ).","title":"FT_List"},{"location":"ft2-list_processing.html#ft_listnode","text":"Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListNodeRec_* FT_ListNode ; Many elements and objects in FreeType are listed through an FT_List record (see FT_ListRec ). As its name suggests, an FT_ListNode is a handle to a single list element.","title":"FT_ListNode"},{"location":"ft2-list_processing.html#ft_listrec","text":"Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListRec_ { FT_ListNode head; FT_ListNode tail; } FT_ListRec ; A structure used to hold a simple doubly-linked list. These are used in many parts of FreeType.","title":"FT_ListRec"},{"location":"ft2-list_processing.html#ft_listnoderec","text":"Defined in FT_TYPES_H (freetype/fttypes.h). typedef struct FT_ListNodeRec_ { FT_ListNode prev; FT_ListNode next; void * data; } FT_ListNodeRec ; A structure used to hold a single list element.","title":"FT_ListNodeRec"},{"location":"ft2-list_processing.html#ft_list_add","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Add ( FT_List list, FT_ListNode node ); Append an element to the end of a list.","title":"FT_List_Add"},{"location":"ft2-list_processing.html#ft_list_insert","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Insert ( FT_List list, FT_ListNode node ); Insert an element at the head of a list.","title":"FT_List_Insert"},{"location":"ft2-list_processing.html#ft_list_find","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( FT_ListNode ) FT_List_Find ( FT_List list, void * data ); Find the list node for a given listed object.","title":"FT_List_Find"},{"location":"ft2-list_processing.html#ft_list_remove","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Remove ( FT_List list, FT_ListNode node ); Remove a node from a list. This function doesn't check whether the node is in the list!","title":"FT_List_Remove"},{"location":"ft2-list_processing.html#ft_list_up","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Up ( FT_List list, FT_ListNode node ); Move a node to the head/top of a list. Used to maintain LRU lists.","title":"FT_List_Up"},{"location":"ft2-list_processing.html#ft_list_iterate","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( FT_Error ) FT_List_Iterate ( FT_List list, FT_List_Iterator iterator, void * user ); Parse a list and calls a given iterator function on each element. Note that parsing is stopped as soon as one of the iterator calls returns a non-zero value.","title":"FT_List_Iterate"},{"location":"ft2-list_processing.html#ft_list_iterator","text":"Defined in FT_LIST_H (freetype/ftlist.h). typedef FT_Error (* FT_List_Iterator )( FT_ListNode node, void * user ); An FT_List iterator function that is called during a list parse by FT_List_Iterate .","title":"FT_List_Iterator"},{"location":"ft2-list_processing.html#ft_list_finalize","text":"Defined in FT_LIST_H (freetype/ftlist.h). FT_EXPORT( void ) FT_List_Finalize ( FT_List list, FT_List_Destructor destroy, FT_Memory memory, void * user ); Destroy all elements in the list as well as the list itself.","title":"FT_List_Finalize"},{"location":"ft2-list_processing.html#ft_list_destructor","text":"Defined in FT_LIST_H (freetype/ftlist.h). typedef void (* FT_List_Destructor )( FT_Memory memory, void * data, void * user ); An FT_List iterator function that is called during a list finalization by FT_List_Finalize to destroy all elements in a given list.","title":"FT_List_Destructor"},{"location":"ft2-lzw.html","text":"FreeType Docs Support API LZW Streams LZW Streams Synopsis This section contains the declaration of LZW-specific functions. FT_Stream_OpenLZW Defined in FT_LZW_H (freetype/ftlzw.h). FT_EXPORT( FT_Error ) FT_Stream_OpenLZW ( FT_Stream stream, FT_Stream source ); Open a new stream to parse LZW-compressed font files. This is mainly used to support the compressed *.pcf.Z fonts that come with XFree86. input stream The target embedding stream. source The source stream. return FreeType error code. 0 means success. note The source stream must be opened before calling this function. Calling the internal function FT_Stream_Close on the new stream will not call FT_Stream_Close on the source stream. None of the stream objects will be released to the heap. The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream In certain builds of the library, LZW compression recognition is automatically handled when calling FT_New_Face or FT_Open_Face . This means that if no font driver is capable of handling the raw compressed file, the library will try to open a LZW stream from it and re-open the face with it. This function may return FT_Err_Unimplemented_Feature if your build of FreeType was not compiled with LZW support.","title":"LZW Streams"},{"location":"ft2-lzw.html#lzw-streams","text":"","title":"LZW Streams"},{"location":"ft2-lzw.html#synopsis","text":"This section contains the declaration of LZW-specific functions.","title":"Synopsis"},{"location":"ft2-lzw.html#ft_stream_openlzw","text":"Defined in FT_LZW_H (freetype/ftlzw.h). FT_EXPORT( FT_Error ) FT_Stream_OpenLZW ( FT_Stream stream, FT_Stream source ); Open a new stream to parse LZW-compressed font files. This is mainly used to support the compressed *.pcf.Z fonts that come with XFree86.","title":"FT_Stream_OpenLZW"},{"location":"ft2-mac_specific.html","text":"FreeType Docs Core API Mac Specific Interface Mac Specific Interface Synopsis The following definitions are only available if FreeType is compiled on a Macintosh. FT_New_Face_From_FOND Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_New_Face_From_FOND ( FT_Library library, Handle fond, FT_Long face_index, FT_Face *aface ) FT_DEPRECATED_ATTRIBUTE; Create a new face object from a FOND resource. inout library A handle to the library resource. input fond A FOND resource. face_index Only supported for the -1 sanity check special case. output aface A handle to a new face object. return FreeType error code. 0 means success. example This function can be used to create FT_Face objects from fonts that are installed in the system as follows. fond = GetResource( FOND , fontName ); error = FT_New_Face_From_FOND( library, fond, 0, face ); FT_GetFile_From_Mac_Name Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_GetFile_From_Mac_Name ( const char * fontName, FSSpec* pathSpec, FT_Long * face_index ) FT_DEPRECATED_ATTRIBUTE; Return an FSSpec for the disk file containing the named font. input fontName Mac OS name of the font (e.g., Times New Roman Bold). output pathSpec FSSpec to the file. For passing to FT_New_Face_From_FSSpec . face_index Index of the face. For passing to FT_New_Face_From_FSSpec . return FreeType error code. 0 means success. FT_GetFile_From_Mac_ATS_Name Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_GetFile_From_Mac_ATS_Name ( const char * fontName, FSSpec* pathSpec, FT_Long * face_index ) FT_DEPRECATED_ATTRIBUTE; Return an FSSpec for the disk file containing the named font. input fontName Mac OS name of the font in ATS framework. output pathSpec FSSpec to the file. For passing to FT_New_Face_From_FSSpec . face_index Index of the face. For passing to FT_New_Face_From_FSSpec . return FreeType error code. 0 means success. FT_GetFilePath_From_Mac_ATS_Name Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_GetFilePath_From_Mac_ATS_Name ( const char * fontName, UInt8* path, UInt32 maxPathSize, FT_Long * face_index ) FT_DEPRECATED_ATTRIBUTE; Return a pathname of the disk file and face index for given font name that is handled by ATS framework. input fontName Mac OS name of the font in ATS framework. output path Buffer to store pathname of the file. For passing to FT_New_Face . The client must allocate this buffer before calling this function. maxPathSize Lengths of the buffer path that client allocated. face_index Index of the face. For passing to FT_New_Face . return FreeType error code. 0 means success. FT_New_Face_From_FSSpec Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_New_Face_From_FSSpec ( FT_Library library, const FSSpec *spec, FT_Long face_index, FT_Face *aface ) FT_DEPRECATED_ATTRIBUTE; Create a new face object from a given resource and typeface index using an FSSpec to the font file. inout library A handle to the library resource. input spec FSSpec to the font file. face_index The index of the face within the resource. The first face has index 0. output aface A handle to a new face object. return FreeType error code. 0 means success. note FT_New_Face_From_FSSpec is identical to FT_New_Face except it accepts an FSSpec instead of a path. FT_New_Face_From_FSRef Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_New_Face_From_FSRef ( FT_Library library, const FSRef *ref, FT_Long face_index, FT_Face *aface ) FT_DEPRECATED_ATTRIBUTE; Create a new face object from a given resource and typeface index using an FSRef to the font file. inout library A handle to the library resource. input spec FSRef to the font file. face_index The index of the face within the resource. The first face has index 0. output aface A handle to a new face object. return FreeType error code. 0 means success. note FT_New_Face_From_FSRef is identical to FT_New_Face except it accepts an FSRef instead of a path.","title":"Mac Specific Interface"},{"location":"ft2-mac_specific.html#mac-specific-interface","text":"","title":"Mac Specific Interface"},{"location":"ft2-mac_specific.html#synopsis","text":"The following definitions are only available if FreeType is compiled on a Macintosh.","title":"Synopsis"},{"location":"ft2-mac_specific.html#ft_new_face_from_fond","text":"Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_New_Face_From_FOND ( FT_Library library, Handle fond, FT_Long face_index, FT_Face *aface ) FT_DEPRECATED_ATTRIBUTE; Create a new face object from a FOND resource.","title":"FT_New_Face_From_FOND"},{"location":"ft2-mac_specific.html#ft_getfile_from_mac_name","text":"Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_GetFile_From_Mac_Name ( const char * fontName, FSSpec* pathSpec, FT_Long * face_index ) FT_DEPRECATED_ATTRIBUTE; Return an FSSpec for the disk file containing the named font.","title":"FT_GetFile_From_Mac_Name"},{"location":"ft2-mac_specific.html#ft_getfile_from_mac_ats_name","text":"Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_GetFile_From_Mac_ATS_Name ( const char * fontName, FSSpec* pathSpec, FT_Long * face_index ) FT_DEPRECATED_ATTRIBUTE; Return an FSSpec for the disk file containing the named font.","title":"FT_GetFile_From_Mac_ATS_Name"},{"location":"ft2-mac_specific.html#ft_getfilepath_from_mac_ats_name","text":"Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_GetFilePath_From_Mac_ATS_Name ( const char * fontName, UInt8* path, UInt32 maxPathSize, FT_Long * face_index ) FT_DEPRECATED_ATTRIBUTE; Return a pathname of the disk file and face index for given font name that is handled by ATS framework.","title":"FT_GetFilePath_From_Mac_ATS_Name"},{"location":"ft2-mac_specific.html#ft_new_face_from_fsspec","text":"Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_New_Face_From_FSSpec ( FT_Library library, const FSSpec *spec, FT_Long face_index, FT_Face *aface ) FT_DEPRECATED_ATTRIBUTE; Create a new face object from a given resource and typeface index using an FSSpec to the font file.","title":"FT_New_Face_From_FSSpec"},{"location":"ft2-mac_specific.html#ft_new_face_from_fsref","text":"Defined in FT_MAC_H (freetype/ftmac.h). FT_EXPORT( FT_Error ) FT_New_Face_From_FSRef ( FT_Library library, const FSRef *ref, FT_Long face_index, FT_Face *aface ) FT_DEPRECATED_ATTRIBUTE; Create a new face object from a given resource and typeface index using an FSRef to the font file.","title":"FT_New_Face_From_FSRef"},{"location":"ft2-module_management.html","text":"FreeType Docs Support API Module Management Module Management Synopsis The definitions below are used to manage modules within FreeType. Modules can be added, upgraded, and removed at runtime. Additionally, some module properties can be controlled also. Here is a list of possible values of the module_name field in the FT_Module_Class structure. autofitter bdf cff gxvalid otvalid pcf pfr psaux pshinter psnames raster1 sfnt smooth, smooth-lcd, smooth-lcdv truetype type1 type42 t1cid winfonts Note that the FreeType Cache sub-system is not a FreeType module. FT_Module Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_ModuleRec_* FT_Module ; A handle to a given FreeType module object. A module can be a font driver, a renderer, or anything else that provides services to the former. FT_Module_Constructor Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef FT_Error (* FT_Module_Constructor )( FT_Module module ); A function used to initialize (not create) a new module object. input module The module to initialize. FT_Module_Destructor Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef void (* FT_Module_Destructor )( FT_Module module ); A function used to finalize (not destroy) a given module object. input module The module to finalize. FT_Module_Requester Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef FT_Module_Interface (* FT_Module_Requester )( FT_Module module, const char * name ); A function used to query a given module for a specific interface. input module The module to be searched. name The name of the interface in the module. FT_Module_Class Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef struct FT_Module_Class_ { FT_ULong module_flags; FT_Long module_size; const FT_String * module_name; FT_Fixed module_version; FT_Fixed module_requires; const void * module_interface; FT_Module_Constructor module_init; FT_Module_Destructor module_done; FT_Module_Requester get_interface; } FT_Module_Class ; The module class descriptor. While being a public structure necessary for FreeType's module bookkeeping, most of the fields are essentially internal, not to be used directly by an application. fields module_flags Bit flags describing the module. module_size The size of one module object/instance in bytes. module_name The name of the module. module_version The version, as a 16.16 fixed number (major.minor). module_requires The version of FreeType this module requires, as a 16.16 fixed number (major.minor). Starts at version 2.0, i.e., 0x20000. module_interface A typeless pointer to a structure (which varies between different modules) that holds the module's interface functions. This is essentially what get_interface returns. module_init The initializing function. module_done The finalizing function. get_interface The interface requesting function. FT_Add_Module Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Add_Module ( FT_Library library, const FT_Module_Class * clazz ); Add a new module to a given library instance. inout library A handle to the library object. input clazz A pointer to class descriptor for the module. return FreeType error code. 0 means success. note An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great. FT_Get_Module Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Module ) FT_Get_Module ( FT_Library library, const char * module_name ); Find a module by its name. input library A handle to the library object. module_name The module's name (as an ASCII string). return A module handle. 0 if none was found. note FreeType's internal modules aren't documented very well, and you should look up the source code for details. FT_Remove_Module Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Remove_Module ( FT_Library library, FT_Module module ); Remove a given module from a library instance. inout library A handle to a library object. input module A handle to a module object. return FreeType error code. 0 means success. note The module object is destroyed by the function in case of success. FT_Add_Default_Modules Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( void ) FT_Add_Default_Modules ( FT_Library library ); Add the set of default drivers to a given library object. This is only useful when you create a library object with FT_New_Library (usually to plug a custom memory manager). inout library A handle to a new library object. FT_Property_Set Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Property_Set ( FT_Library library, const FT_String * module_name, const FT_String * property_name, const void * value ); Set a property for a given module. input library A handle to the library the module is part of. module_name The module name. property_name The property name. Properties are described in section Driver properties . Note that only a few modules have properties. value A generic pointer to a variable or structure that gives the new value of the property. The exact definition of value is dependent on the property; see section Driver properties . return FreeType error code. 0 means success. note If module_name isn't a valid module name, or property_name doesn't specify a valid property, or if value doesn't represent a valid value for the given property, an error is returned. The following example sets property bar (a simple integer) in module foo to value 1. FT_UInt bar; bar = 1; FT_Property_Set( library, foo , bar , bar ); Note that the FreeType Cache sub-system doesn't recognize module property changes. To avoid glyph lookup confusion within the cache you should call FTC_Manager_Reset to completely flush the cache if a module property gets changed after FTC_Manager_New has been called. It is not possible to set properties of the FreeType Cache sub-system itself with FT_Property_Set; use ?FTC_Property_Set? instead. since 2.4.11 FT_Property_Get Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Property_Get ( FT_Library library, const FT_String * module_name, const FT_String * property_name, void * value ); Get a module's property value. input library A handle to the library the module is part of. module_name The module name. property_name The property name. Properties are described in section Driver properties . inout value A generic pointer to a variable or structure that gives the value of the property. The exact definition of value is dependent on the property; see section Driver properties . return FreeType error code. 0 means success. note If module_name isn't a valid module name, or property_name doesn't specify a valid property, or if value doesn't represent a valid value for the given property, an error is returned. The following example gets property baz (a range) in module foo . typedef range_ { FT_Int32 min; FT_Int32 max; } range; range baz; FT_Property_Get( library, foo , baz , baz ); It is not possible to retrieve properties of the FreeType Cache sub-system with FT_Property_Get; use ?FTC_Property_Get? instead. since 2.4.11 FT_Set_Default_Properties Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( void ) FT_Set_Default_Properties ( FT_Library library ); If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the FREETYPE_PROPERTIES environment variable to control driver properties. See section Driver properties for more. If the compilation option is not set, this function does nothing. FREETYPE_PROPERTIES has the following syntax form (broken here into multiple lines for better readability). optional whitespace module-name1 : property-name1 = property-value1 whitespace module-name2 : property-name2 = property-value2 ... Example: FREETYPE_PROPERTIES=truetype:interpreter-version=35 \\ cff:no-stem-darkening=1 \\ autofitter:warping=1 inout library A handle to a new library object. since 2.8 FT_New_Library Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_New_Library ( FT_Memory memory, FT_Library *alibrary ); This function is used to create a new FreeType library instance from a given memory object. It is thus possible to use libraries with distinct memory allocators within the same program. Note, however, that the used FT_Memory structure is expected to remain valid for the life of the FT_Library object. Normally, you would call this function (followed by a call to FT_Add_Default_Modules or a series of calls to FT_Add_Module , and a call to FT_Set_Default_Properties ) instead of FT_Init_FreeType to initialize the FreeType library. Don't use FT_Done_FreeType but FT_Done_Library to destroy a library instance. input memory A handle to the original memory object. output alibrary A pointer to handle of a new library object. return FreeType error code. 0 means success. note See the discussion of reference counters in the description of FT_Reference_Library . FT_Done_Library Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Done_Library ( FT_Library library ); Discard a given library object. This closes all drivers and discards all resource objects. input library A handle to the target library. return FreeType error code. 0 means success. note See the discussion of reference counters in the description of FT_Reference_Library . FT_Reference_Library Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Reference_Library ( FT_Library library ); A counter gets initialized to 1 at the time an FT_Library structure is created. This function increments the counter. FT_Done_Library then only destroys a library if the counter is 1, otherwise it simply decrements the counter. This function helps in managing life-cycles of structures that reference FT_Library objects. input library A handle to a target library object. return FreeType error code. 0 means success. since 2.4.2 FT_Renderer Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_RendererRec_* FT_Renderer ; A handle to a given FreeType renderer. A renderer is a module in charge of converting a glyph's outline image to a bitmap. It supports a single glyph image format, and one or more target surface depths. FT_Renderer_Class Defined in FT_RENDER_H (freetype/ftrender.h). typedef struct FT_Renderer_Class_ { FT_Module_Class root; FT_Glyph_Format glyph_format; FT_Renderer_RenderFunc render_glyph; FT_Renderer_TransformFunc transform_glyph; FT_Renderer_GetCBoxFunc get_glyph_cbox; FT_Renderer_SetModeFunc set_mode; FT_Raster_Funcs * raster_class; } FT_Renderer_Class ; The renderer module class descriptor. fields root The root FT_Module_Class fields. glyph_format The glyph image format this renderer handles. render_glyph A method used to render the image that is in a given glyph slot into a bitmap. transform_glyph A method used to transform the image that is in a given glyph slot. get_glyph_cbox A method used to access the glyph's cbox. set_mode A method used to pass additional parameters. raster_class For FT_GLYPH_FORMAT_OUTLINE renderers only. This is a pointer to its raster's class. FT_Get_Renderer Defined in FT_RENDER_H (freetype/ftrender.h). FT_EXPORT( FT_Renderer ) FT_Get_Renderer ( FT_Library library, FT_Glyph_Format format ); Retrieve the current renderer for a given glyph format. input library A handle to the library object. format The glyph format. return A renderer handle. 0 if none found. note An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great. To add a new renderer, simply use FT_Add_Module . To retrieve a renderer by its name, use FT_Get_Module . FT_Set_Renderer Defined in FT_RENDER_H (freetype/ftrender.h). FT_EXPORT( FT_Error ) FT_Set_Renderer ( FT_Library library, FT_Renderer renderer, FT_UInt num_params, FT_Parameter * parameters ); Set the current renderer to use, and set additional mode. inout library A handle to the library object. input renderer A handle to the renderer object. num_params The number of additional parameters. parameters Additional parameters. return FreeType error code. 0 means success. note In case of success, the renderer will be used to convert glyph images in the renderer's known format into bitmaps. This doesn't change the current renderer for other formats. Currently, no FreeType renderer module uses parameters ; you should thus always pass NULL as the value. FT_Set_Debug_Hook Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( void ) FT_Set_Debug_Hook ( FT_Library library, FT_UInt hook_index, FT_DebugHook_Func debug_hook ); Set a debug hook function for debugging the interpreter of a font format. While this is a public API function, an application needs access to FreeType's internal header files to do something useful. Have a look at the source code of the ttdebug FreeType demo program for an example of its usage. inout library A handle to the library object. input hook_index The index of the debug hook. You should use defined enumeration macros like FT_DEBUG_HOOK_TRUETYPE . debug_hook The function used to debug the interpreter. note Currently, four debug hook slots are available, but only one (for the TrueType interpreter) is defined. FT_Driver Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_DriverRec_* FT_Driver ; A handle to a given FreeType font driver object. A font driver is a module capable of creating faces from font files. FT_DebugHook_Func Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef void (* FT_DebugHook_Func )( void * arg ); A drop-in replacement (or rather a wrapper) for the bytecode or charstring interpreter's main loop function. Its job is essentially to activate debug mode to enforce single-stepping, to call the main loop function to interpret the next opcode, and to show the changed context to the user. An example for such a main loop function is TT_RunIns (declared in FreeType's internal header file src/truetype/ttinterp.h ). Have a look at the source code of the ttdebug FreeType demo program for an example of a drop-in replacement. inout arg A typeless pointer, to be cast to the main loop function's data structure (which depends on the font module). For TrueType fonts it is bytecode interpreter's execution context, TT_ExecContext , which is declared in FreeType's internal header file tttypes.h . FT_DEBUG_HOOK_XXX Defined in FT_MODULE_H (freetype/ftmodapi.h). # define FT_DEBUG_HOOK_TRUETYPE 0 A list of named debug hook indices. values FT_DEBUG_HOOK_TRUETYPE This hook index identifies the TrueType bytecode debugger.","title":"Module Management"},{"location":"ft2-module_management.html#module-management","text":"","title":"Module Management"},{"location":"ft2-module_management.html#synopsis","text":"The definitions below are used to manage modules within FreeType. Modules can be added, upgraded, and removed at runtime. Additionally, some module properties can be controlled also. 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A module can be a font driver, a renderer, or anything else that provides services to the former.","title":"FT_Module"},{"location":"ft2-module_management.html#ft_module_constructor","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef FT_Error (* FT_Module_Constructor )( FT_Module module ); A function used to initialize (not create) a new module object.","title":"FT_Module_Constructor"},{"location":"ft2-module_management.html#ft_module_destructor","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef void (* FT_Module_Destructor )( FT_Module module ); A function used to finalize (not destroy) a given module object.","title":"FT_Module_Destructor"},{"location":"ft2-module_management.html#ft_module_requester","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef FT_Module_Interface (* FT_Module_Requester )( FT_Module module, const char * name ); A function used to query a given module for a specific interface.","title":"FT_Module_Requester"},{"location":"ft2-module_management.html#ft_module_class","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef struct FT_Module_Class_ { FT_ULong module_flags; FT_Long module_size; const FT_String * module_name; FT_Fixed module_version; FT_Fixed module_requires; const void * module_interface; FT_Module_Constructor module_init; FT_Module_Destructor module_done; FT_Module_Requester get_interface; } FT_Module_Class ; The module class descriptor. While being a public structure necessary for FreeType's module bookkeeping, most of the fields are essentially internal, not to be used directly by an application.","title":"FT_Module_Class"},{"location":"ft2-module_management.html#ft_add_module","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Add_Module ( FT_Library library, const FT_Module_Class * clazz ); Add a new module to a given library instance.","title":"FT_Add_Module"},{"location":"ft2-module_management.html#ft_get_module","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Module ) FT_Get_Module ( FT_Library library, const char * module_name ); Find a module by its name.","title":"FT_Get_Module"},{"location":"ft2-module_management.html#ft_remove_module","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Remove_Module ( FT_Library library, FT_Module module ); Remove a given module from a library instance.","title":"FT_Remove_Module"},{"location":"ft2-module_management.html#ft_add_default_modules","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( void ) FT_Add_Default_Modules ( FT_Library library ); Add the set of default drivers to a given library object. This is only useful when you create a library object with FT_New_Library (usually to plug a custom memory manager).","title":"FT_Add_Default_Modules"},{"location":"ft2-module_management.html#ft_property_set","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Property_Set ( FT_Library library, const FT_String * module_name, const FT_String * property_name, const void * value ); Set a property for a given module.","title":"FT_Property_Set"},{"location":"ft2-module_management.html#ft_property_get","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Property_Get ( FT_Library library, const FT_String * module_name, const FT_String * property_name, void * value ); Get a module's property value.","title":"FT_Property_Get"},{"location":"ft2-module_management.html#ft_set_default_properties","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( void ) FT_Set_Default_Properties ( FT_Library library ); If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the FREETYPE_PROPERTIES environment variable to control driver properties. See section Driver properties for more. If the compilation option is not set, this function does nothing. FREETYPE_PROPERTIES has the following syntax form (broken here into multiple lines for better readability). optional whitespace module-name1 : property-name1 = property-value1 whitespace module-name2 : property-name2 = property-value2 ... 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Don't use FT_Done_FreeType but FT_Done_Library to destroy a library instance.","title":"FT_New_Library"},{"location":"ft2-module_management.html#ft_done_library","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Done_Library ( FT_Library library ); Discard a given library object. This closes all drivers and discards all resource objects.","title":"FT_Done_Library"},{"location":"ft2-module_management.html#ft_reference_library","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_Error ) FT_Reference_Library ( FT_Library library ); A counter gets initialized to 1 at the time an FT_Library structure is created. This function increments the counter. FT_Done_Library then only destroys a library if the counter is 1, otherwise it simply decrements the counter. This function helps in managing life-cycles of structures that reference FT_Library objects.","title":"FT_Reference_Library"},{"location":"ft2-module_management.html#ft_renderer","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_RendererRec_* FT_Renderer ; A handle to a given FreeType renderer. A renderer is a module in charge of converting a glyph's outline image to a bitmap. It supports a single glyph image format, and one or more target surface depths.","title":"FT_Renderer"},{"location":"ft2-module_management.html#ft_renderer_class","text":"Defined in FT_RENDER_H (freetype/ftrender.h). typedef struct FT_Renderer_Class_ { FT_Module_Class root; FT_Glyph_Format glyph_format; FT_Renderer_RenderFunc render_glyph; FT_Renderer_TransformFunc transform_glyph; FT_Renderer_GetCBoxFunc get_glyph_cbox; FT_Renderer_SetModeFunc set_mode; FT_Raster_Funcs * raster_class; } FT_Renderer_Class ; The renderer module class descriptor.","title":"FT_Renderer_Class"},{"location":"ft2-module_management.html#ft_get_renderer","text":"Defined in FT_RENDER_H (freetype/ftrender.h). FT_EXPORT( FT_Renderer ) FT_Get_Renderer ( FT_Library library, FT_Glyph_Format format ); Retrieve the current renderer for a given glyph format.","title":"FT_Get_Renderer"},{"location":"ft2-module_management.html#ft_set_renderer","text":"Defined in FT_RENDER_H (freetype/ftrender.h). FT_EXPORT( FT_Error ) FT_Set_Renderer ( FT_Library library, FT_Renderer renderer, FT_UInt num_params, FT_Parameter * parameters ); Set the current renderer to use, and set additional mode.","title":"FT_Set_Renderer"},{"location":"ft2-module_management.html#ft_set_debug_hook","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( void ) FT_Set_Debug_Hook ( FT_Library library, FT_UInt hook_index, FT_DebugHook_Func debug_hook ); Set a debug hook function for debugging the interpreter of a font format. While this is a public API function, an application needs access to FreeType's internal header files to do something useful. Have a look at the source code of the ttdebug FreeType demo program for an example of its usage.","title":"FT_Set_Debug_Hook"},{"location":"ft2-module_management.html#ft_driver","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). typedef struct FT_DriverRec_* FT_Driver ; A handle to a given FreeType font driver object. A font driver is a module capable of creating faces from font files.","title":"FT_Driver"},{"location":"ft2-module_management.html#ft_debughook_func","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef void (* FT_DebugHook_Func )( void * arg ); A drop-in replacement (or rather a wrapper) for the bytecode or charstring interpreter's main loop function. Its job is essentially to activate debug mode to enforce single-stepping, to call the main loop function to interpret the next opcode, and to show the changed context to the user. An example for such a main loop function is TT_RunIns (declared in FreeType's internal header file src/truetype/ttinterp.h ). Have a look at the source code of the ttdebug FreeType demo program for an example of a drop-in replacement.","title":"FT_DebugHook_Func"},{"location":"ft2-module_management.html#ft_debug_hook_xxx","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). # define FT_DEBUG_HOOK_TRUETYPE 0 A list of named debug hook indices.","title":"FT_DEBUG_HOOK_XXX"},{"location":"ft2-multiple_masters.html","text":"FreeType Docs Format-Specific API Multiple Masters Multiple Masters Synopsis The following types and functions are used to manage Multiple Master fonts, i.e., the selection of specific design instances by setting design axis coordinates. Besides Adobe MM fonts, the interface supports Apple's TrueType GX and OpenType variation fonts. Some of the routines only work with Adobe MM fonts, others will work with all three types. They are similar enough that a consistent interface makes sense. FT_MM_Axis Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_MM_Axis_ { FT_String * name; FT_Long minimum; FT_Long maximum; } FT_MM_Axis ; A structure to model a given axis in design space for Multiple Masters fonts. This structure can't be used for TrueType GX or OpenType variation fonts. fields name The axis's name. minimum The axis's minimum design coordinate. maximum The axis's maximum design coordinate. FT_Multi_Master Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_Multi_Master_ { FT_UInt num_axis; FT_UInt num_designs; FT_MM_Axis axis[T1_MAX_MM_AXIS]; } FT_Multi_Master ; A structure to model the axes and space of a Multiple Masters font. This structure can't be used for TrueType GX or OpenType variation fonts. fields num_axis Number of axes. Cannot exceed 4. num_designs Number of designs; should be normally 2^num_axis even though the Type 1 specification strangely allows for intermediate designs to be present. This number cannot exceed 16. axis A table of axis descriptors. FT_Var_Axis Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_Var_Axis_ { FT_String * name; FT_Fixed minimum; FT_Fixed def; FT_Fixed maximum; FT_ULong tag; FT_UInt strid; } FT_Var_Axis ; A structure to model a given axis in design space for Multiple Masters, TrueType GX, and OpenType variation fonts. fields name The axis's name. Not always meaningful for TrueType GX or OpenType variation fonts. minimum The axis's minimum design coordinate. def The axis's default design coordinate. FreeType computes meaningful default values for Adobe MM fonts. maximum The axis's maximum design coordinate. tag The axis's tag (the equivalent to name for TrueType GX and OpenType variation fonts). FreeType provides default values for Adobe MM fonts if possible. strid The axis name entry in the font's name table. This is another (and often better) version of the name field for TrueType GX or OpenType variation fonts. Not meaningful for Adobe MM fonts. note The fields minimum , def , and maximum are 16.16 fractional values for TrueType GX and OpenType variation fonts. For Adobe MM fonts, the values are integers. FT_Var_Named_Style Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_Var_Named_Style_ { FT_Fixed * coords; FT_UInt strid; FT_UInt psid; /* since 2.7.1 */ } FT_Var_Named_Style ; A structure to model a named instance in a TrueType GX or OpenType variation font. This structure can't be used for Adobe MM fonts. fields coords The design coordinates for this instance. This is an array with one entry for each axis. strid The entry in name table identifying this instance. psid The entry in name table identifying a PostScript name for this instance. Value 0xFFFF indicates a missing entry. FT_MM_Var Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_MM_Var_ { FT_UInt num_axis; FT_UInt num_designs; FT_UInt num_namedstyles; FT_Var_Axis * axis; FT_Var_Named_Style * namedstyle; } FT_MM_Var ; A structure to model the axes and space of an Adobe MM, TrueType GX, or OpenType variation font. Some fields are specific to one format and not to the others. fields num_axis The number of axes. The maximum value is 4 for Adobe MM fonts; no limit in TrueType GX or OpenType variation fonts. num_designs The number of designs; should be normally 2^num_axis for Adobe MM fonts. Not meaningful for TrueType GX or OpenType variation fonts (where every glyph could have a different number of designs). num_namedstyles The number of named styles; a named style is a tuple of design coordinates that has a string ID (in the name table) associated with it. The font can tell the user that, for example, [Weight=1.5,Width=1.1] is Bold . Another name for named style is named instance . For Adobe Multiple Masters fonts, this value is always zero because the format does not support named styles. axis An axis descriptor table. TrueType GX and OpenType variation fonts contain slightly more data than Adobe MM fonts. Memory management of this pointer is done internally by FreeType. namedstyle A named style (instance) table. Only meaningful for TrueType GX and OpenType variation fonts. Memory management of this pointer is done internally by FreeType. FT_Get_Multi_Master Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Multi_Master ( FT_Face face, FT_Multi_Master *amaster ); Retrieve a variation descriptor of a given Adobe MM font. This function can't be used with TrueType GX or OpenType variation fonts. input face A handle to the source face. output amaster The Multiple Masters descriptor. return FreeType error code. 0 means success. FT_Get_MM_Var Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_MM_Var ( FT_Face face, FT_MM_Var * *amaster ); Retrieve a variation descriptor for a given font. This function works with all supported variation formats. input face A handle to the source face. output amaster The variation descriptor. Allocates a data structure, which the user must deallocate with a call to FT_Done_MM_Var after use. return FreeType error code. 0 means success. FT_Done_MM_Var Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Done_MM_Var ( FT_Library library, FT_MM_Var *amaster ); Free the memory allocated by FT_Get_MM_Var . input library A handle of the face's parent library object that was used in the call to FT_Get_MM_Var to create amaster . return FreeType error code. 0 means success. FT_Set_MM_Design_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_MM_Design_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Long * coords ); For Adobe MM fonts, choose an interpolated font design through design coordinates. This function can't be used with TrueType GX or OpenType variation fonts. inout face A handle to the source face. input num_coords The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes. coords An array of design coordinates. return FreeType error code. 0 means success. note [Since 2.8.1] To reset all axes to the default values, call the function with num_coords set to zero and coords set to NULL . [Since 2.9] If num_coords is larger than zero, this function sets the FT_FACE_FLAG_VARIATION bit in FT_Face 's face_flags field (i.e., FT_IS_VARIATION will return true). If num_coords is zero, this bit flag gets unset. FT_Set_Var_Design_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_Var_Design_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Choose an interpolated font design through design coordinates. This function works with all supported variation formats. inout face A handle to the source face. input num_coords The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes. coords An array of design coordinates. return FreeType error code. 0 means success. note [Since 2.8.1] To reset all axes to the default values, call the function with num_coords set to zero and coords set to NULL . [Since 2.9] Default values means the currently selected named instance (or the base font if no named instance is selected). [Since 2.9] If num_coords is larger than zero, this function sets the FT_FACE_FLAG_VARIATION bit in FT_Face 's face_flags field (i.e., FT_IS_VARIATION will return true). If num_coords is zero, this bit flag gets unset. FT_Get_Var_Design_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Var_Design_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Get the design coordinates of the currently selected interpolated font. This function works with all supported variation formats. input face A handle to the source face. num_coords The number of design coordinates to retrieve. If it is larger than the number of axes, set the excess values to 0. output coords The design coordinates array. return FreeType error code. 0 means success. since 2.7.1 FT_Set_MM_Blend_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_MM_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Choose an interpolated font design through normalized blend coordinates. This function works with all supported variation formats. inout face A handle to the source face. input num_coords The number of available design coordinates. If it is larger than the number of axes, ignore the excess values. If it is smaller than the number of axes, use default values for the remaining axes. coords The design coordinates array (each element must be between 0 and 1.0 for Adobe MM fonts, and between -1.0 and 1.0 for TrueType GX and OpenType variation fonts). return FreeType error code. 0 means success. note [Since 2.8.1] To reset all axes to the default values, call the function with num_coords set to zero and coords set to NULL . [Since 2.9] Default values means the currently selected named instance (or the base font if no named instance is selected). [Since 2.9] If num_coords is larger than zero, this function sets the FT_FACE_FLAG_VARIATION bit in FT_Face 's face_flags field (i.e., FT_IS_VARIATION will return true). If num_coords is zero, this bit flag gets unset. FT_Get_MM_Blend_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_MM_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Get the normalized blend coordinates of the currently selected interpolated font. This function works with all supported variation formats. input face A handle to the source face. num_coords The number of normalized blend coordinates to retrieve. If it is larger than the number of axes, set the excess values to 0.5 for Adobe MM fonts, and to 0 for TrueType GX and OpenType variation fonts. output coords The normalized blend coordinates array. return FreeType error code. 0 means success. since 2.7.1 FT_Set_Var_Blend_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_Var_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); This is another name of FT_Set_MM_Blend_Coordinates . FT_Get_Var_Blend_Coordinates Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Var_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); This is another name of FT_Get_MM_Blend_Coordinates . since 2.7.1 FT_Set_MM_WeightVector Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_MM_WeightVector ( FT_Face face, FT_UInt len, FT_Fixed * weightvector ); For Adobe MM fonts, choose an interpolated font design by directly setting the weight vector. This function can't be used with TrueType GX or OpenType variation fonts. inout face A handle to the source face. input len The length of the weight vector array. If it is larger than the number of designs, the extra values are ignored. If it is less than the number of designs, the remaining values are set to zero. weightvector An array representing the weight vector. return FreeType error code. 0 means success. note Adobe Multiple Master fonts limit the number of designs, and thus the length of the weight vector to 16. If len is zero and weightvector is NULL , the weight vector array is reset to the default values. The Adobe documentation also states that the values in the WeightVector array must total 1.0 0.001. In practice this does not seem to be enforced, so is not enforced here, either. since 2.10 FT_Get_MM_WeightVector Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_MM_WeightVector ( FT_Face face, FT_UInt * len, FT_Fixed * weightvector ); For Adobe MM fonts, retrieve the current weight vector of the font. This function can't be used with TrueType GX or OpenType variation fonts. inout face A handle to the source face. len A pointer to the size of the array to be filled. If the size of the array is less than the number of designs, FT_Err_Invalid_Argument is returned, and len is set to the required size (the number of designs). If the size of the array is greater than the number of designs, the remaining entries are set to 0. On successful completion, len is set to the number of designs (i.e., the number of values written to the array). output weightvector An array to be filled. return FreeType error code. 0 means success. note Adobe Multiple Master fonts limit the number of designs, and thus the length of the WeightVector to 16. since 2.10 FT_VAR_AXIS_FLAG_XXX Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). # define FT_VAR_AXIS_FLAG_HIDDEN 1 A list of bit flags used in the return value of FT_Get_Var_Axis_Flags . values FT_VAR_AXIS_FLAG_HIDDEN The variation axis should not be exposed to user interfaces. since 2.8.1 FT_Get_Var_Axis_Flags Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Var_Axis_Flags ( FT_MM_Var * master, FT_UInt axis_index, FT_UInt * flags ); Get the flags field of an OpenType Variation Axis Record. Not meaningful for Adobe MM fonts ( *flags is always zero). input master The variation descriptor. axis_index The index of the requested variation axis. output flags The flags field. See FT_VAR_AXIS_FLAG_XXX for possible values. return FreeType error code. 0 means success. since 2.8.1 FT_Set_Named_Instance Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_Named_Instance ( FT_Face face, FT_UInt instance_index ); Set or change the current named instance. input face A handle to the source face. instance_index The index of the requested instance, starting with value 1. If set to value 0, FreeType switches to font access without a named instance. return FreeType error code. 0 means success. note The function uses the value of instance_index to set bits 16-30 of the face's face_index field. It also resets any variation applied to the font, and the FT_FACE_FLAG_VARIATION bit of the face's face_flags field gets reset to zero (i.e., FT_IS_VARIATION will return false). For Adobe MM fonts (which don't have named instances) this function simply resets the current face to the default instance. since 2.9","title":"Multiple Masters"},{"location":"ft2-multiple_masters.html#multiple-masters","text":"","title":"Multiple Masters"},{"location":"ft2-multiple_masters.html#synopsis","text":"The following types and functions are used to manage Multiple Master fonts, i.e., the selection of specific design instances by setting design axis coordinates. Besides Adobe MM fonts, the interface supports Apple's TrueType GX and OpenType variation fonts. Some of the routines only work with Adobe MM fonts, others will work with all three types. They are similar enough that a consistent interface makes sense.","title":"Synopsis"},{"location":"ft2-multiple_masters.html#ft_mm_axis","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_MM_Axis_ { FT_String * name; FT_Long minimum; FT_Long maximum; } FT_MM_Axis ; A structure to model a given axis in design space for Multiple Masters fonts. This structure can't be used for TrueType GX or OpenType variation fonts.","title":"FT_MM_Axis"},{"location":"ft2-multiple_masters.html#ft_multi_master","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_Multi_Master_ { FT_UInt num_axis; FT_UInt num_designs; FT_MM_Axis axis[T1_MAX_MM_AXIS]; } FT_Multi_Master ; A structure to model the axes and space of a Multiple Masters font. This structure can't be used for TrueType GX or OpenType variation fonts.","title":"FT_Multi_Master"},{"location":"ft2-multiple_masters.html#ft_var_axis","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_Var_Axis_ { FT_String * name; FT_Fixed minimum; FT_Fixed def; FT_Fixed maximum; FT_ULong tag; FT_UInt strid; } FT_Var_Axis ; A structure to model a given axis in design space for Multiple Masters, TrueType GX, and OpenType variation fonts.","title":"FT_Var_Axis"},{"location":"ft2-multiple_masters.html#ft_var_named_style","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_Var_Named_Style_ { FT_Fixed * coords; FT_UInt strid; FT_UInt psid; /* since 2.7.1 */ } FT_Var_Named_Style ; A structure to model a named instance in a TrueType GX or OpenType variation font. This structure can't be used for Adobe MM fonts.","title":"FT_Var_Named_Style"},{"location":"ft2-multiple_masters.html#ft_mm_var","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). typedef struct FT_MM_Var_ { FT_UInt num_axis; FT_UInt num_designs; FT_UInt num_namedstyles; FT_Var_Axis * axis; FT_Var_Named_Style * namedstyle; } FT_MM_Var ; A structure to model the axes and space of an Adobe MM, TrueType GX, or OpenType variation font. Some fields are specific to one format and not to the others.","title":"FT_MM_Var"},{"location":"ft2-multiple_masters.html#ft_get_multi_master","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Multi_Master ( FT_Face face, FT_Multi_Master *amaster ); Retrieve a variation descriptor of a given Adobe MM font. This function can't be used with TrueType GX or OpenType variation fonts.","title":"FT_Get_Multi_Master"},{"location":"ft2-multiple_masters.html#ft_get_mm_var","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_MM_Var ( FT_Face face, FT_MM_Var * *amaster ); Retrieve a variation descriptor for a given font. This function works with all supported variation formats.","title":"FT_Get_MM_Var"},{"location":"ft2-multiple_masters.html#ft_done_mm_var","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Done_MM_Var ( FT_Library library, FT_MM_Var *amaster ); Free the memory allocated by FT_Get_MM_Var .","title":"FT_Done_MM_Var"},{"location":"ft2-multiple_masters.html#ft_set_mm_design_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_MM_Design_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Long * coords ); For Adobe MM fonts, choose an interpolated font design through design coordinates. This function can't be used with TrueType GX or OpenType variation fonts.","title":"FT_Set_MM_Design_Coordinates"},{"location":"ft2-multiple_masters.html#ft_set_var_design_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_Var_Design_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Choose an interpolated font design through design coordinates. This function works with all supported variation formats.","title":"FT_Set_Var_Design_Coordinates"},{"location":"ft2-multiple_masters.html#ft_get_var_design_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Var_Design_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Get the design coordinates of the currently selected interpolated font. This function works with all supported variation formats.","title":"FT_Get_Var_Design_Coordinates"},{"location":"ft2-multiple_masters.html#ft_set_mm_blend_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_MM_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Choose an interpolated font design through normalized blend coordinates. This function works with all supported variation formats.","title":"FT_Set_MM_Blend_Coordinates"},{"location":"ft2-multiple_masters.html#ft_get_mm_blend_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_MM_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); Get the normalized blend coordinates of the currently selected interpolated font. This function works with all supported variation formats.","title":"FT_Get_MM_Blend_Coordinates"},{"location":"ft2-multiple_masters.html#ft_set_var_blend_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_Var_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); This is another name of FT_Set_MM_Blend_Coordinates .","title":"FT_Set_Var_Blend_Coordinates"},{"location":"ft2-multiple_masters.html#ft_get_var_blend_coordinates","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Var_Blend_Coordinates ( FT_Face face, FT_UInt num_coords, FT_Fixed * coords ); This is another name of FT_Get_MM_Blend_Coordinates .","title":"FT_Get_Var_Blend_Coordinates"},{"location":"ft2-multiple_masters.html#ft_set_mm_weightvector","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_MM_WeightVector ( FT_Face face, FT_UInt len, FT_Fixed * weightvector ); For Adobe MM fonts, choose an interpolated font design by directly setting the weight vector. This function can't be used with TrueType GX or OpenType variation fonts.","title":"FT_Set_MM_WeightVector"},{"location":"ft2-multiple_masters.html#ft_get_mm_weightvector","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_MM_WeightVector ( FT_Face face, FT_UInt * len, FT_Fixed * weightvector ); For Adobe MM fonts, retrieve the current weight vector of the font. This function can't be used with TrueType GX or OpenType variation fonts.","title":"FT_Get_MM_WeightVector"},{"location":"ft2-multiple_masters.html#ft_var_axis_flag_xxx","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). # define FT_VAR_AXIS_FLAG_HIDDEN 1 A list of bit flags used in the return value of FT_Get_Var_Axis_Flags .","title":"FT_VAR_AXIS_FLAG_XXX"},{"location":"ft2-multiple_masters.html#ft_get_var_axis_flags","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Get_Var_Axis_Flags ( FT_MM_Var * master, FT_UInt axis_index, FT_UInt * flags ); Get the flags field of an OpenType Variation Axis Record. Not meaningful for Adobe MM fonts ( *flags is always zero).","title":"FT_Get_Var_Axis_Flags"},{"location":"ft2-multiple_masters.html#ft_set_named_instance","text":"Defined in FT_MULTIPLE_MASTERS_H (freetype/ftmm.h). FT_EXPORT( FT_Error ) FT_Set_Named_Instance ( FT_Face face, FT_UInt instance_index ); Set or change the current named instance.","title":"FT_Set_Named_Instance"},{"location":"ft2-ot_validation.html","text":"FreeType Docs Miscellaneous OpenType Validation OpenType Validation Synopsis This section contains the declaration of functions to validate some OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH). FT_OpenType_Validate Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h). FT_EXPORT( FT_Error ) FT_OpenType_Validate ( FT_Face face, FT_UInt validation_flags, FT_Bytes *BASE_table, FT_Bytes *GDEF_table, FT_Bytes *GPOS_table, FT_Bytes *GSUB_table, FT_Bytes *JSTF_table ); Validate various OpenType tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming). input face A handle to the input face. validation_flags A bit field that specifies the tables to be validated. See FT_VALIDATE_OTXXX for possible values. output BASE_table A pointer to the BASE table. GDEF_table A pointer to the GDEF table. GPOS_table A pointer to the GPOS table. GSUB_table A pointer to the GSUB table. JSTF_table A pointer to the JSTF table. return FreeType error code. 0 means success. note This function only works with OpenType fonts, returning an error otherwise. After use, the application should deallocate the five tables with FT_OpenType_Free . A NULL value indicates that the table either doesn't exist in the font, or the application hasn't asked for validation. FT_OpenType_Free Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h). FT_EXPORT( void ) FT_OpenType_Free ( FT_Face face, FT_Bytes table ); Free the buffer allocated by OpenType validator. input face A handle to the input face. table The pointer to the buffer that is allocated by FT_OpenType_Validate . note This function must be used to free the buffer allocated by FT_OpenType_Validate only. FT_VALIDATE_OTXXX Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h). # define FT_VALIDATE_BASE 0x0100 # define FT_VALIDATE_GDEF 0x0200 # define FT_VALIDATE_GPOS 0x0400 # define FT_VALIDATE_GSUB 0x0800 # define FT_VALIDATE_JSTF 0x1000 # define FT_VALIDATE_MATH 0x2000 # define FT_VALIDATE_OT ( FT_VALIDATE_BASE | \\ FT_VALIDATE_GDEF | \\ FT_VALIDATE_GPOS | \\ FT_VALIDATE_GSUB | \\ FT_VALIDATE_JSTF | \\ FT_VALIDATE_MATH ) A list of bit-field constants used with FT_OpenType_Validate to indicate which OpenType tables should be validated. values FT_VALIDATE_BASE Validate BASE table. FT_VALIDATE_GDEF Validate GDEF table. FT_VALIDATE_GPOS Validate GPOS table. FT_VALIDATE_GSUB Validate GSUB table. FT_VALIDATE_JSTF Validate JSTF table. FT_VALIDATE_MATH Validate MATH table. FT_VALIDATE_OT Validate all OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).","title":"OpenType Validation"},{"location":"ft2-ot_validation.html#opentype-validation","text":"","title":"OpenType Validation"},{"location":"ft2-ot_validation.html#synopsis","text":"This section contains the declaration of functions to validate some OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).","title":"Synopsis"},{"location":"ft2-ot_validation.html#ft_opentype_validate","text":"Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h). FT_EXPORT( FT_Error ) FT_OpenType_Validate ( FT_Face face, FT_UInt validation_flags, FT_Bytes *BASE_table, FT_Bytes *GDEF_table, FT_Bytes *GPOS_table, FT_Bytes *GSUB_table, FT_Bytes *JSTF_table ); Validate various OpenType tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).","title":"FT_OpenType_Validate"},{"location":"ft2-ot_validation.html#ft_opentype_free","text":"Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h). FT_EXPORT( void ) FT_OpenType_Free ( FT_Face face, FT_Bytes table ); Free the buffer allocated by OpenType validator.","title":"FT_OpenType_Free"},{"location":"ft2-ot_validation.html#ft_validate_otxxx","text":"Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h). # define FT_VALIDATE_BASE 0x0100 # define FT_VALIDATE_GDEF 0x0200 # define FT_VALIDATE_GPOS 0x0400 # define FT_VALIDATE_GSUB 0x0800 # define FT_VALIDATE_JSTF 0x1000 # define FT_VALIDATE_MATH 0x2000 # define FT_VALIDATE_OT ( FT_VALIDATE_BASE | \\ FT_VALIDATE_GDEF | \\ FT_VALIDATE_GPOS | \\ FT_VALIDATE_GSUB | \\ FT_VALIDATE_JSTF | \\ FT_VALIDATE_MATH ) A list of bit-field constants used with FT_OpenType_Validate to indicate which OpenType tables should be validated.","title":"FT_VALIDATE_OTXXX"},{"location":"ft2-outline_processing.html","text":"FreeType Docs Support API Outline Processing Outline Processing Synopsis This section contains routines used to create and destroy scalable glyph images known as outlines . These can also be measured, transformed, and converted into bitmaps and pixmaps. FT_Outline Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Outline_ { short n_contours; /* number of contours in glyph */ short n_points; /* number of points in the glyph */ FT_Vector * points; /* the outline's points */ char * tags; /* the points flags */ short * contours; /* the contour end points */ int flags; /* outline masks */ } FT_Outline ; This structure is used to describe an outline to the scan-line converter. fields n_contours The number of contours in the outline. n_points The number of points in the outline. points A pointer to an array of n_points FT_Vector elements, giving the outline's point coordinates. tags A pointer to an array of n_points chars, giving each outline point's type. If bit 0 is unset, the point is off the curve, i.e., a Bezier control point, while it is on if set. Bit 1 is meaningful for off points only. If set, it indicates a third-order Bezier arc control point; and a second-order control point if unset. If bit 2 is set, bits 5-7 contain the drop-out mode (as defined in the OpenType specification; the value is the same as the argument to the SCANMODE instruction). Bits 3 and 4 are reserved for internal purposes. contours An array of n_contours shorts, giving the end point of each contour within the outline. For example, the first contour is defined by the points 0 to contours[0] , the second one is defined by the points contours[0]+1 to contours[1] , etc. flags A set of bit flags used to characterize the outline and give hints to the scan-converter and hinter on how to convert/grid-fit it. See FT_OUTLINE_XXX . note The B/W rasterizer only checks bit 2 in the tags array for the first point of each contour. The drop-out mode as given with FT_OUTLINE_IGNORE_DROPOUTS , FT_OUTLINE_SMART_DROPOUTS , and FT_OUTLINE_INCLUDE_STUBS in flags is then overridden. FT_Outline_New Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_New ( FT_Library library, FT_UInt numPoints, FT_Int numContours, FT_Outline *anoutline ); Create a new outline of a given size. input library A handle to the library object from where the outline is allocated. Note however that the new outline will not necessarily be freed , when destroying the library, by FT_Done_FreeType . numPoints The maximum number of points within the outline. Must be smaller than or equal to 0xFFFF (65535). numContours The maximum number of contours within the outline. This value must be in the range 0 to numPoints . output anoutline A handle to the new outline. return FreeType error code. 0 means success. note The reason why this function takes a library parameter is simply to use the library's memory allocator. FT_Outline_Done Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Done ( FT_Library library, FT_Outline * outline ); Destroy an outline created with FT_Outline_New . input library A handle of the library object used to allocate the outline. outline A pointer to the outline object to be discarded. return FreeType error code. 0 means success. note If the outline's owner field is not set, only the outline descriptor will be released. FT_Outline_Copy Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Copy ( const FT_Outline * source, FT_Outline *target ); Copy an outline into another one. Both objects must have the same sizes (number of points number of contours) when this function is called. input source A handle to the source outline. output target A handle to the target outline. return FreeType error code. 0 means success. FT_Outline_Translate Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Translate ( const FT_Outline * outline, FT_Pos xOffset, FT_Pos yOffset ); Apply a simple translation to the points of an outline. inout outline A pointer to the target outline descriptor. input xOffset The horizontal offset. yOffset The vertical offset. FT_Outline_Transform Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Transform ( const FT_Outline * outline, const FT_Matrix * matrix ); Apply a simple 2x2 matrix to all of an outline's points. Useful for applying rotations, slanting, flipping, etc. inout outline A pointer to the target outline descriptor. input matrix A pointer to the transformation matrix. note You can use FT_Outline_Translate if you need to translate the outline's points. FT_Outline_Embolden Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Embolden ( FT_Outline * outline, FT_Pos strength ); Embolden an outline. The new outline will be at most 4 times strength pixels wider and higher. You may think of the left and bottom borders as unchanged. Negative strength values to reduce the outline thickness are possible also. inout outline A handle to the target outline. input strength How strong the glyph is emboldened. Expressed in 26.6 pixel format. return FreeType error code. 0 means success. note The used algorithm to increase or decrease the thickness of the glyph doesn't change the number of points; this means that certain situations like acute angles or intersections are sometimes handled incorrectly. If you need better metrics values you should call FT_Outline_Get_CBox or FT_Outline_Get_BBox . To get meaningful results, font scaling values must be set with functions like FT_Set_Char_Size before calling FT_Render_Glyph. example FT_Load_Glyph( face, index, FT_LOAD_DEFAULT ); if ( face- glyph- format == FT_GLYPH_FORMAT_OUTLINE ) FT_Outline_Embolden( face- glyph- outline, strength ); FT_Outline_EmboldenXY Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_EmboldenXY ( FT_Outline * outline, FT_Pos xstrength, FT_Pos ystrength ); Embolden an outline. The new outline will be xstrength pixels wider and ystrength pixels higher. Otherwise, it is similar to FT_Outline_Embolden , which uses the same strength in both directions. since 2.4.10 FT_Outline_Reverse Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Reverse ( FT_Outline * outline ); Reverse the drawing direction of an outline. This is used to ensure consistent fill conventions for mirrored glyphs. inout outline A pointer to the target outline descriptor. note This function toggles the bit flag FT_OUTLINE_REVERSE_FILL in the outline's flags field. It shouldn't be used by a normal client application, unless it knows what it is doing. FT_Outline_Check Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Check ( FT_Outline * outline ); Check the contents of an outline descriptor. input outline A handle to a source outline. return FreeType error code. 0 means success. note An empty outline, or an outline with a single point only is also valid. FT_Outline_Get_CBox Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Get_CBox ( const FT_Outline * outline, FT_BBox *acbox ); Return an outline's control box . The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs). Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the ftbbox component, which is dedicated to this single task. input outline A pointer to the source outline descriptor. output acbox The outline's control box. note See FT_Glyph_Get_CBox for a discussion of tricky fonts. FT_Outline_Get_BBox Defined in FT_BBOX_H (freetype/ftbbox.h). FT_EXPORT( FT_Error ) FT_Outline_Get_BBox ( FT_Outline * outline, FT_BBox *abbox ); Compute the exact bounding box of an outline. This is slower than computing the control box. However, it uses an advanced algorithm that returns very quickly when the two boxes coincide. Otherwise, the outline Bezier arcs are traversed to extract their extrema. input outline A pointer to the source outline. output abbox The outline's exact bounding box. return FreeType error code. 0 means success. note If the font is tricky and the glyph has been loaded with FT_LOAD_NO_SCALE , the resulting BBox is meaningless. To get reasonable values for the BBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the BBox, which can be eventually converted back to font units. FT_Outline_Get_Bitmap Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Get_Bitmap ( FT_Library library, FT_Outline * outline, const FT_Bitmap *abitmap ); Render an outline within a bitmap. The outline's image is simply OR-ed to the target bitmap. input library A handle to a FreeType library object. outline A pointer to the source outline descriptor. inout abitmap A pointer to the target bitmap descriptor. return FreeType error code. 0 means success. note This function does not create the bitmap, it only renders an outline image within the one you pass to it! Consequently, the various fields in abitmap should be set accordingly. It will use the raster corresponding to the default glyph format. The value of the num_grays field in abitmap is ignored. If you select the gray-level rasterizer, and you want less than 256 gray levels, you have to use FT_Outline_Render directly. FT_Outline_Render Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Render ( FT_Library library, FT_Outline * outline, FT_Raster_Params * params ); Render an outline within a bitmap using the current scan-convert. This function uses an FT_Raster_Params structure as an argument, allowing advanced features like direct composition, translucency, etc. input library A handle to a FreeType library object. outline A pointer to the source outline descriptor. inout params A pointer to an FT_Raster_Params structure used to describe the rendering operation. return FreeType error code. 0 means success. note You should know what you are doing and how FT_Raster_Params works to use this function. The field params.source will be set to outline before the scan converter is called, which means that the value you give to it is actually ignored. The gray-level rasterizer always uses 256 gray levels. If you want less gray levels, you have to provide your own span callback. See the FT_RASTER_FLAG_DIRECT value of the flags field in the FT_Raster_Params structure for more details. FT_Outline_Decompose Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Decompose ( FT_Outline * outline, const FT_Outline_Funcs * func_interface, void * user ); Walk over an outline's structure to decompose it into individual segments and Bezier arcs. This function also emits move to operations to indicate the start of new contours in the outline. input outline A pointer to the source target. func_interface A table of emitters , i.e., function pointers called during decomposition to indicate path operations. inout user A typeless pointer that is passed to each emitter during the decomposition. It can be used to store the state during the decomposition. return FreeType error code. 0 means success. note A contour that contains a single point only is represented by a move to operation followed by line to to the same point. In most cases, it is best to filter this out before using the outline for stroking purposes (otherwise it would result in a visible dot when round caps are used). Similarly, the function returns success for an empty outline also (doing nothing, this is, not calling any emitter); if necessary, you should filter this out, too. FT_Outline_Funcs Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Outline_Funcs_ { FT_Outline_MoveToFunc move_to; FT_Outline_LineToFunc line_to; FT_Outline_ConicToFunc conic_to; FT_Outline_CubicToFunc cubic_to; int shift; FT_Pos delta; } FT_Outline_Funcs ; A structure to hold various function pointers used during outline decomposition in order to emit segments, conic, and cubic Beziers. fields move_to The move to emitter. line_to The segment emitter. conic_to The second-order Bezier arc emitter. cubic_to The third-order Bezier arc emitter. shift The shift that is applied to coordinates before they are sent to the emitter. delta The delta that is applied to coordinates before they are sent to the emitter, but after the shift. note The point coordinates sent to the emitters are the transformed version of the original coordinates (this is important for high accuracy during scan-conversion). The transformation is simple: x = (x shift) - delta y = (y shift) - delta Set the values of shift and delta to 0 to get the original point coordinates. FT_Outline_MoveToFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_MoveToFunc )( const FT_Vector * to, void * user ); # define FT_Outline_MoveTo_Func FT_Outline_MoveToFunc A function pointer type used to describe the signature of a move to function during outline walking/decomposition. A move to is emitted to start a new contour in an outline. input to A pointer to the target point of the move to . user A typeless pointer, which is passed from the caller of the decomposition function. return Error code. 0 means success. FT_Outline_LineToFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_LineToFunc )( const FT_Vector * to, void * user ); # define FT_Outline_LineTo_Func FT_Outline_LineToFunc A function pointer type used to describe the signature of a line to function during outline walking/decomposition. A line to is emitted to indicate a segment in the outline. input to A pointer to the target point of the line to . user A typeless pointer, which is passed from the caller of the decomposition function. return Error code. 0 means success. FT_Outline_ConicToFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_ConicToFunc )( const FT_Vector * control, const FT_Vector * to, void * user ); # define FT_Outline_ConicTo_Func FT_Outline_ConicToFunc A function pointer type used to describe the signature of a conic to function during outline walking or decomposition. A conic to is emitted to indicate a second-order Bezier arc in the outline. input control An intermediate control point between the last position and the new target in to . to A pointer to the target end point of the conic arc. user A typeless pointer, which is passed from the caller of the decomposition function. return Error code. 0 means success. FT_Outline_CubicToFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_CubicToFunc )( const FT_Vector * control1, const FT_Vector * control2, const FT_Vector * to, void * user ); # define FT_Outline_CubicTo_Func FT_Outline_CubicToFunc A function pointer type used to describe the signature of a cubic to function during outline walking or decomposition. A cubic to is emitted to indicate a third-order Bezier arc. input control1 A pointer to the first Bezier control point. control2 A pointer to the second Bezier control point. to A pointer to the target end point. user A typeless pointer, which is passed from the caller of the decomposition function. return Error code. 0 means success. FT_Orientation Defined in FT_OUTLINE_H (freetype/ftoutln.h). typedef enum FT_Orientation_ { FT_ORIENTATION_TRUETYPE = 0, FT_ORIENTATION_POSTSCRIPT = 1, FT_ORIENTATION_FILL_RIGHT = FT_ORIENTATION_TRUETYPE , FT_ORIENTATION_FILL_LEFT = FT_ORIENTATION_POSTSCRIPT , FT_ORIENTATION_NONE } FT_Orientation ; A list of values used to describe an outline's contour orientation. The TrueType and PostScript specifications use different conventions to determine whether outline contours should be filled or unfilled. values FT_ORIENTATION_TRUETYPE According to the TrueType specification, clockwise contours must be filled, and counter-clockwise ones must be unfilled. FT_ORIENTATION_POSTSCRIPT According to the PostScript specification, counter-clockwise contours must be filled, and clockwise ones must be unfilled. FT_ORIENTATION_FILL_RIGHT This is identical to FT_ORIENTATION_TRUETYPE , but is used to remember that in TrueType, everything that is to the right of the drawing direction of a contour must be filled. FT_ORIENTATION_FILL_LEFT This is identical to FT_ORIENTATION_POSTSCRIPT , but is used to remember that in PostScript, everything that is to the left of the drawing direction of a contour must be filled. FT_ORIENTATION_NONE The orientation cannot be determined. That is, different parts of the glyph have different orientation. FT_Outline_Get_Orientation Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Orientation ) FT_Outline_Get_Orientation ( FT_Outline * outline ); This function analyzes a glyph outline and tries to compute its fill orientation (see FT_Orientation ). This is done by integrating the total area covered by the outline. The positive integral corresponds to the clockwise orientation and FT_ORIENTATION_POSTSCRIPT is returned. The negative integral corresponds to the counter-clockwise orientation and FT_ORIENTATION_TRUETYPE is returned. Note that this will return FT_ORIENTATION_TRUETYPE for empty outlines. input outline A handle to the source outline. return The orientation. FT_OUTLINE_XXX Defined in FT_IMAGE_H (freetype/ftimage.h). # define FT_OUTLINE_NONE 0x0 # define FT_OUTLINE_OWNER 0x1 # define FT_OUTLINE_EVEN_ODD_FILL 0x2 # define FT_OUTLINE_REVERSE_FILL 0x4 # define FT_OUTLINE_IGNORE_DROPOUTS 0x8 # define FT_OUTLINE_SMART_DROPOUTS 0x10 # define FT_OUTLINE_INCLUDE_STUBS 0x20 # define FT_OUTLINE_HIGH_PRECISION 0x100 # define FT_OUTLINE_SINGLE_PASS 0x200 /* these constants are deprecated; use the corresponding */ /* ` FT_OUTLINE_XXX ` values instead */ # define ft_outline_none FT_OUTLINE_NONE # define ft_outline_owner FT_OUTLINE_OWNER # define ft_outline_even_odd_fill FT_OUTLINE_EVEN_ODD_FILL # define ft_outline_reverse_fill FT_OUTLINE_REVERSE_FILL # define ft_outline_ignore_dropouts FT_OUTLINE_IGNORE_DROPOUTS # define ft_outline_high_precision FT_OUTLINE_HIGH_PRECISION # define ft_outline_single_pass FT_OUTLINE_SINGLE_PASS A list of bit-field constants used for the flags in an outline's flags field. values FT_OUTLINE_NONE Value 0 is reserved. FT_OUTLINE_OWNER If set, this flag indicates that the outline's field arrays (i.e., points , flags , and contours ) are owned by the outline object, and should thus be freed when it is destroyed. FT_OUTLINE_EVEN_ODD_FILL By default, outlines are filled using the non-zero winding rule. If set to 1, the outline will be filled using the even-odd fill rule (only works with the smooth rasterizer). FT_OUTLINE_REVERSE_FILL By default, outside contours of an outline are oriented in clock-wise direction, as defined in the TrueType specification. This flag is set if the outline uses the opposite direction (typically for Type 1 fonts). This flag is ignored by the scan converter. FT_OUTLINE_IGNORE_DROPOUTS By default, the scan converter will try to detect drop-outs in an outline and correct the glyph bitmap to ensure consistent shape continuity. If set, this flag hints the scan-line converter to ignore such cases. See below for more information. FT_OUTLINE_SMART_DROPOUTS Select smart dropout control. If unset, use simple dropout control. Ignored if FT_OUTLINE_IGNORE_DROPOUTS is set. See below for more information. FT_OUTLINE_INCLUDE_STUBS If set, turn pixels on for stubs , otherwise exclude them. Ignored if FT_OUTLINE_IGNORE_DROPOUTS is set. See below for more information. FT_OUTLINE_HIGH_PRECISION This flag indicates that the scan-line converter should try to convert this outline to bitmaps with the highest possible quality. It is typically set for small character sizes. Note that this is only a hint that might be completely ignored by a given scan-converter. FT_OUTLINE_SINGLE_PASS This flag is set to force a given scan-converter to only use a single pass over the outline to render a bitmap glyph image. Normally, it is set for very large character sizes. It is only a hint that might be completely ignored by a given scan-converter. note The flags FT_OUTLINE_IGNORE_DROPOUTS , FT_OUTLINE_SMART_DROPOUTS , and FT_OUTLINE_INCLUDE_STUBS are ignored by the smooth rasterizer. There exists a second mechanism to pass the drop-out mode to the B/W rasterizer; see the tags field in FT_Outline . Please refer to the description of the SCANTYPE instruction in the OpenType specification (in file ttinst1.doc ) how simple drop-outs, smart drop-outs, and stubs are defined.","title":"Outline Processing"},{"location":"ft2-outline_processing.html#outline-processing","text":"","title":"Outline Processing"},{"location":"ft2-outline_processing.html#synopsis","text":"This section contains routines used to create and destroy scalable glyph images known as outlines . These can also be measured, transformed, and converted into bitmaps and pixmaps.","title":"Synopsis"},{"location":"ft2-outline_processing.html#ft_outline","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Outline_ { short n_contours; /* number of contours in glyph */ short n_points; /* number of points in the glyph */ FT_Vector * points; /* the outline's points */ char * tags; /* the points flags */ short * contours; /* the contour end points */ int flags; /* outline masks */ } FT_Outline ; This structure is used to describe an outline to the scan-line converter.","title":"FT_Outline"},{"location":"ft2-outline_processing.html#ft_outline_new","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_New ( FT_Library library, FT_UInt numPoints, FT_Int numContours, FT_Outline *anoutline ); Create a new outline of a given size.","title":"FT_Outline_New"},{"location":"ft2-outline_processing.html#ft_outline_done","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Done ( FT_Library library, FT_Outline * outline ); Destroy an outline created with FT_Outline_New .","title":"FT_Outline_Done"},{"location":"ft2-outline_processing.html#ft_outline_copy","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Copy ( const FT_Outline * source, FT_Outline *target ); Copy an outline into another one. Both objects must have the same sizes (number of points number of contours) when this function is called.","title":"FT_Outline_Copy"},{"location":"ft2-outline_processing.html#ft_outline_translate","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Translate ( const FT_Outline * outline, FT_Pos xOffset, FT_Pos yOffset ); Apply a simple translation to the points of an outline.","title":"FT_Outline_Translate"},{"location":"ft2-outline_processing.html#ft_outline_transform","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Transform ( const FT_Outline * outline, const FT_Matrix * matrix ); Apply a simple 2x2 matrix to all of an outline's points. Useful for applying rotations, slanting, flipping, etc.","title":"FT_Outline_Transform"},{"location":"ft2-outline_processing.html#ft_outline_embolden","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Embolden ( FT_Outline * outline, FT_Pos strength ); Embolden an outline. The new outline will be at most 4 times strength pixels wider and higher. You may think of the left and bottom borders as unchanged. Negative strength values to reduce the outline thickness are possible also.","title":"FT_Outline_Embolden"},{"location":"ft2-outline_processing.html#ft_outline_emboldenxy","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_EmboldenXY ( FT_Outline * outline, FT_Pos xstrength, FT_Pos ystrength ); Embolden an outline. The new outline will be xstrength pixels wider and ystrength pixels higher. Otherwise, it is similar to FT_Outline_Embolden , which uses the same strength in both directions.","title":"FT_Outline_EmboldenXY"},{"location":"ft2-outline_processing.html#ft_outline_reverse","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Reverse ( FT_Outline * outline ); Reverse the drawing direction of an outline. This is used to ensure consistent fill conventions for mirrored glyphs.","title":"FT_Outline_Reverse"},{"location":"ft2-outline_processing.html#ft_outline_check","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Check ( FT_Outline * outline ); Check the contents of an outline descriptor.","title":"FT_Outline_Check"},{"location":"ft2-outline_processing.html#ft_outline_get_cbox","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( void ) FT_Outline_Get_CBox ( const FT_Outline * outline, FT_BBox *acbox ); Return an outline's control box . The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs). Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the ftbbox component, which is dedicated to this single task.","title":"FT_Outline_Get_CBox"},{"location":"ft2-outline_processing.html#ft_outline_get_bbox","text":"Defined in FT_BBOX_H (freetype/ftbbox.h). FT_EXPORT( FT_Error ) FT_Outline_Get_BBox ( FT_Outline * outline, FT_BBox *abbox ); Compute the exact bounding box of an outline. This is slower than computing the control box. However, it uses an advanced algorithm that returns very quickly when the two boxes coincide. Otherwise, the outline Bezier arcs are traversed to extract their extrema.","title":"FT_Outline_Get_BBox"},{"location":"ft2-outline_processing.html#ft_outline_get_bitmap","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Get_Bitmap ( FT_Library library, FT_Outline * outline, const FT_Bitmap *abitmap ); Render an outline within a bitmap. The outline's image is simply OR-ed to the target bitmap.","title":"FT_Outline_Get_Bitmap"},{"location":"ft2-outline_processing.html#ft_outline_render","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Render ( FT_Library library, FT_Outline * outline, FT_Raster_Params * params ); Render an outline within a bitmap using the current scan-convert. This function uses an FT_Raster_Params structure as an argument, allowing advanced features like direct composition, translucency, etc.","title":"FT_Outline_Render"},{"location":"ft2-outline_processing.html#ft_outline_decompose","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Error ) FT_Outline_Decompose ( FT_Outline * outline, const FT_Outline_Funcs * func_interface, void * user ); Walk over an outline's structure to decompose it into individual segments and Bezier arcs. This function also emits move to operations to indicate the start of new contours in the outline.","title":"FT_Outline_Decompose"},{"location":"ft2-outline_processing.html#ft_outline_funcs","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Outline_Funcs_ { FT_Outline_MoveToFunc move_to; FT_Outline_LineToFunc line_to; FT_Outline_ConicToFunc conic_to; FT_Outline_CubicToFunc cubic_to; int shift; FT_Pos delta; } FT_Outline_Funcs ; A structure to hold various function pointers used during outline decomposition in order to emit segments, conic, and cubic Beziers.","title":"FT_Outline_Funcs"},{"location":"ft2-outline_processing.html#ft_outline_movetofunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_MoveToFunc )( const FT_Vector * to, void * user ); # define FT_Outline_MoveTo_Func FT_Outline_MoveToFunc A function pointer type used to describe the signature of a move to function during outline walking/decomposition. A move to is emitted to start a new contour in an outline.","title":"FT_Outline_MoveToFunc"},{"location":"ft2-outline_processing.html#ft_outline_linetofunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_LineToFunc )( const FT_Vector * to, void * user ); # define FT_Outline_LineTo_Func FT_Outline_LineToFunc A function pointer type used to describe the signature of a line to function during outline walking/decomposition. A line to is emitted to indicate a segment in the outline.","title":"FT_Outline_LineToFunc"},{"location":"ft2-outline_processing.html#ft_outline_conictofunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_ConicToFunc )( const FT_Vector * control, const FT_Vector * to, void * user ); # define FT_Outline_ConicTo_Func FT_Outline_ConicToFunc A function pointer type used to describe the signature of a conic to function during outline walking or decomposition. A conic to is emitted to indicate a second-order Bezier arc in the outline.","title":"FT_Outline_ConicToFunc"},{"location":"ft2-outline_processing.html#ft_outline_cubictofunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Outline_CubicToFunc )( const FT_Vector * control1, const FT_Vector * control2, const FT_Vector * to, void * user ); # define FT_Outline_CubicTo_Func FT_Outline_CubicToFunc A function pointer type used to describe the signature of a cubic to function during outline walking or decomposition. A cubic to is emitted to indicate a third-order Bezier arc.","title":"FT_Outline_CubicToFunc"},{"location":"ft2-outline_processing.html#ft_orientation","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). typedef enum FT_Orientation_ { FT_ORIENTATION_TRUETYPE = 0, FT_ORIENTATION_POSTSCRIPT = 1, FT_ORIENTATION_FILL_RIGHT = FT_ORIENTATION_TRUETYPE , FT_ORIENTATION_FILL_LEFT = FT_ORIENTATION_POSTSCRIPT , FT_ORIENTATION_NONE } FT_Orientation ; A list of values used to describe an outline's contour orientation. The TrueType and PostScript specifications use different conventions to determine whether outline contours should be filled or unfilled.","title":"FT_Orientation"},{"location":"ft2-outline_processing.html#ft_outline_get_orientation","text":"Defined in FT_OUTLINE_H (freetype/ftoutln.h). FT_EXPORT( FT_Orientation ) FT_Outline_Get_Orientation ( FT_Outline * outline ); This function analyzes a glyph outline and tries to compute its fill orientation (see FT_Orientation ). This is done by integrating the total area covered by the outline. The positive integral corresponds to the clockwise orientation and FT_ORIENTATION_POSTSCRIPT is returned. The negative integral corresponds to the counter-clockwise orientation and FT_ORIENTATION_TRUETYPE is returned. Note that this will return FT_ORIENTATION_TRUETYPE for empty outlines.","title":"FT_Outline_Get_Orientation"},{"location":"ft2-outline_processing.html#ft_outline_xxx","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). # define FT_OUTLINE_NONE 0x0 # define FT_OUTLINE_OWNER 0x1 # define FT_OUTLINE_EVEN_ODD_FILL 0x2 # define FT_OUTLINE_REVERSE_FILL 0x4 # define FT_OUTLINE_IGNORE_DROPOUTS 0x8 # define FT_OUTLINE_SMART_DROPOUTS 0x10 # define FT_OUTLINE_INCLUDE_STUBS 0x20 # define FT_OUTLINE_HIGH_PRECISION 0x100 # define FT_OUTLINE_SINGLE_PASS 0x200 /* these constants are deprecated; use the corresponding */ /* ` FT_OUTLINE_XXX ` values instead */ # define ft_outline_none FT_OUTLINE_NONE # define ft_outline_owner FT_OUTLINE_OWNER # define ft_outline_even_odd_fill FT_OUTLINE_EVEN_ODD_FILL # define ft_outline_reverse_fill FT_OUTLINE_REVERSE_FILL # define ft_outline_ignore_dropouts FT_OUTLINE_IGNORE_DROPOUTS # define ft_outline_high_precision FT_OUTLINE_HIGH_PRECISION # define ft_outline_single_pass FT_OUTLINE_SINGLE_PASS A list of bit-field constants used for the flags in an outline's flags field.","title":"FT_OUTLINE_XXX"},{"location":"ft2-parameter_tags.html","text":"FreeType Docs Controlling FreeType Modules Parameter Tags Parameter Tags Synopsis This section contains macros for the FT_Parameter structure that are used with various functions to activate some special functionality or different behaviour of various components of FreeType. FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY # define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY \\ FT_MAKE_TAG ( 'i', 'g', 'p', 'f' ) /* this constant is deprecated */ # define FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \\ FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY A tag for FT_Parameter to make FT_Open_Face ignore typographic family names in the name table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction. since 2.8 FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY # define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY \\ FT_MAKE_TAG ( 'i', 'g', 'p', 's' ) /* this constant is deprecated */ # define FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \\ FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY A tag for FT_Parameter to make FT_Open_Face ignore typographic subfamily names in the name table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction. since 2.8 FT_PARAM_TAG_INCREMENTAL # define FT_PARAM_TAG_INCREMENTAL \\ FT_MAKE_TAG ( 'i', 'n', 'c', 'r' ) An FT_Parameter tag to be used with FT_Open_Face to indicate incremental glyph loading. FT_PARAM_TAG_LCD_FILTER_WEIGHTS # define FT_PARAM_TAG_LCD_FILTER_WEIGHTS \\ FT_MAKE_TAG ( 'l', 'c', 'd', 'f' ) An FT_Parameter tag to be used with FT_Face_Properties . The corresponding argument specifies the five LCD filter weights for a given face (if using FT_LOAD_TARGET_LCD , for example), overriding the global default values or the values set up with FT_Library_SetLcdFilterWeights . since 2.8 FT_PARAM_TAG_RANDOM_SEED # define FT_PARAM_TAG_RANDOM_SEED \\ FT_MAKE_TAG ( 's', 'e', 'e', 'd' ) An FT_Parameter tag to be used with FT_Face_Properties . The corresponding 32bit signed integer argument overrides the font driver's random seed value with a face-specific one; see random-seed . since 2.8 FT_PARAM_TAG_STEM_DARKENING # define FT_PARAM_TAG_STEM_DARKENING \\ FT_MAKE_TAG ( 'd', 'a', 'r', 'k' ) An FT_Parameter tag to be used with FT_Face_Properties . The corresponding Boolean argument specifies whether to apply stem darkening, overriding the global default values or the values set up with FT_Property_Set (see no-stem-darkening ). This is a passive setting that only takes effect if the font driver or autohinter honors it, which the CFF, Type 1, and CID drivers always do, but the autohinter only in light hinting mode (as of version 2.9). since 2.8 FT_PARAM_TAG_UNPATENTED_HINTING # define FT_PARAM_TAG_UNPATENTED_HINTING \\ FT_MAKE_TAG ( 'u', 'n', 'p', 'a' ) Deprecated, no effect. Previously: A constant used as the tag of an FT_Parameter structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by FT_Open_Face .","title":"Parameter Tags"},{"location":"ft2-parameter_tags.html#parameter-tags","text":"","title":"Parameter Tags"},{"location":"ft2-parameter_tags.html#synopsis","text":"This section contains macros for the FT_Parameter structure that are used with various functions to activate some special functionality or different behaviour of various components of FreeType.","title":"Synopsis"},{"location":"ft2-parameter_tags.html#ft_param_tag_ignore_typographic_family","text":"# define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY \\ FT_MAKE_TAG ( 'i', 'g', 'p', 'f' ) /* this constant is deprecated */ # define FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \\ FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY A tag for FT_Parameter to make FT_Open_Face ignore typographic family names in the name table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.","title":"FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY"},{"location":"ft2-parameter_tags.html#ft_param_tag_ignore_typographic_subfamily","text":"# define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY \\ FT_MAKE_TAG ( 'i', 'g', 'p', 's' ) /* this constant is deprecated */ # define FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \\ FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY A tag for FT_Parameter to make FT_Open_Face ignore typographic subfamily names in the name table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.","title":"FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY"},{"location":"ft2-parameter_tags.html#ft_param_tag_incremental","text":"# define FT_PARAM_TAG_INCREMENTAL \\ FT_MAKE_TAG ( 'i', 'n', 'c', 'r' ) An FT_Parameter tag to be used with FT_Open_Face to indicate incremental glyph loading.","title":"FT_PARAM_TAG_INCREMENTAL"},{"location":"ft2-parameter_tags.html#ft_param_tag_lcd_filter_weights","text":"# define FT_PARAM_TAG_LCD_FILTER_WEIGHTS \\ FT_MAKE_TAG ( 'l', 'c', 'd', 'f' ) An FT_Parameter tag to be used with FT_Face_Properties . The corresponding argument specifies the five LCD filter weights for a given face (if using FT_LOAD_TARGET_LCD , for example), overriding the global default values or the values set up with FT_Library_SetLcdFilterWeights .","title":"FT_PARAM_TAG_LCD_FILTER_WEIGHTS"},{"location":"ft2-parameter_tags.html#ft_param_tag_random_seed","text":"# define FT_PARAM_TAG_RANDOM_SEED \\ FT_MAKE_TAG ( 's', 'e', 'e', 'd' ) An FT_Parameter tag to be used with FT_Face_Properties . The corresponding 32bit signed integer argument overrides the font driver's random seed value with a face-specific one; see random-seed .","title":"FT_PARAM_TAG_RANDOM_SEED"},{"location":"ft2-parameter_tags.html#ft_param_tag_stem_darkening","text":"# define FT_PARAM_TAG_STEM_DARKENING \\ FT_MAKE_TAG ( 'd', 'a', 'r', 'k' ) An FT_Parameter tag to be used with FT_Face_Properties . The corresponding Boolean argument specifies whether to apply stem darkening, overriding the global default values or the values set up with FT_Property_Set (see no-stem-darkening ). This is a passive setting that only takes effect if the font driver or autohinter honors it, which the CFF, Type 1, and CID drivers always do, but the autohinter only in light hinting mode (as of version 2.9).","title":"FT_PARAM_TAG_STEM_DARKENING"},{"location":"ft2-parameter_tags.html#ft_param_tag_unpatented_hinting","text":"# define FT_PARAM_TAG_UNPATENTED_HINTING \\ FT_MAKE_TAG ( 'u', 'n', 'p', 'a' ) Deprecated, no effect. Previously: A constant used as the tag of an FT_Parameter structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by FT_Open_Face .","title":"FT_PARAM_TAG_UNPATENTED_HINTING"},{"location":"ft2-pcf_driver.html","text":"FreeType Docs Controlling FreeType Modules The PCF driver The PCF driver Synopsis While FreeType's PCF driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get . Right now, there is a single property no-long-family-names available if FreeType is compiled with PCF_CONFIG_OPTION_LONG_FAMILY_NAMES. The PCF driver's module name is pcf .","title":"The PCF driver"},{"location":"ft2-pcf_driver.html#the-pcf-driver","text":"","title":"The PCF driver"},{"location":"ft2-pcf_driver.html#synopsis","text":"While FreeType's PCF driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get . Right now, there is a single property no-long-family-names available if FreeType is compiled with PCF_CONFIG_OPTION_LONG_FAMILY_NAMES. The PCF driver's module name is pcf .","title":"Synopsis"},{"location":"ft2-pfr_fonts.html","text":"FreeType Docs Format-Specific API PFR Fonts PFR Fonts Synopsis This section contains the declaration of PFR-specific functions. FT_Get_PFR_Metrics Defined in FT_PFR_H (freetype/ftpfr.h). FT_EXPORT( FT_Error ) FT_Get_PFR_Metrics ( FT_Face face, FT_UInt *aoutline_resolution, FT_UInt *ametrics_resolution, FT_Fixed *ametrics_x_scale, FT_Fixed *ametrics_y_scale ); Return the outline and metrics resolutions of a given PFR face. input face Handle to the input face. It can be a non-PFR face. output aoutline_resolution Outline resolution. This is equivalent to face- units_per_EM for non-PFR fonts. Optional (parameter can be NULL ). ametrics_resolution Metrics resolution. This is equivalent to outline_resolution for non-PFR fonts. Optional (parameter can be NULL ). ametrics_x_scale A 16.16 fixed-point number used to scale distance expressed in metrics units to device subpixels. This is equivalent to face- size- x_scale , but for metrics only. Optional (parameter can be NULL ). ametrics_y_scale Same as ametrics_x_scale but for the vertical direction. optional (parameter can be NULL ). return FreeType error code. 0 means success. note If the input face is not a PFR, this function will return an error. However, in all cases, it will return valid values. FT_Get_PFR_Kerning Defined in FT_PFR_H (freetype/ftpfr.h). FT_EXPORT( FT_Error ) FT_Get_PFR_Kerning ( FT_Face face, FT_UInt left, FT_UInt right, FT_Vector *avector ); Return the kerning pair corresponding to two glyphs in a PFR face. The distance is expressed in metrics units, unlike the result of FT_Get_Kerning . input face A handle to the input face. left Index of the left glyph. right Index of the right glyph. output avector A kerning vector. return FreeType error code. 0 means success. note This function always return distances in original PFR metrics units. This is unlike FT_Get_Kerning with the FT_KERNING_UNSCALED mode, which always returns distances converted to outline units. You can use the value of the x_scale and y_scale parameters returned by FT_Get_PFR_Metrics to scale these to device subpixels. FT_Get_PFR_Advance Defined in FT_PFR_H (freetype/ftpfr.h). FT_EXPORT( FT_Error ) FT_Get_PFR_Advance ( FT_Face face, FT_UInt gindex, FT_Pos *aadvance ); Return a given glyph advance, expressed in original metrics units, from a PFR font. input face A handle to the input face. gindex The glyph index. output aadvance The glyph advance in metrics units. return FreeType error code. 0 means success. note You can use the x_scale or y_scale results of FT_Get_PFR_Metrics to convert the advance to device subpixels (i.e., 1/64 th of pixels).","title":"PFR Fonts"},{"location":"ft2-pfr_fonts.html#pfr-fonts","text":"","title":"PFR Fonts"},{"location":"ft2-pfr_fonts.html#synopsis","text":"This section contains the declaration of PFR-specific functions.","title":"Synopsis"},{"location":"ft2-pfr_fonts.html#ft_get_pfr_metrics","text":"Defined in FT_PFR_H (freetype/ftpfr.h). FT_EXPORT( FT_Error ) FT_Get_PFR_Metrics ( FT_Face face, FT_UInt *aoutline_resolution, FT_UInt *ametrics_resolution, FT_Fixed *ametrics_x_scale, FT_Fixed *ametrics_y_scale ); Return the outline and metrics resolutions of a given PFR face.","title":"FT_Get_PFR_Metrics"},{"location":"ft2-pfr_fonts.html#ft_get_pfr_kerning","text":"Defined in FT_PFR_H (freetype/ftpfr.h). FT_EXPORT( FT_Error ) FT_Get_PFR_Kerning ( FT_Face face, FT_UInt left, FT_UInt right, FT_Vector *avector ); Return the kerning pair corresponding to two glyphs in a PFR face. The distance is expressed in metrics units, unlike the result of FT_Get_Kerning .","title":"FT_Get_PFR_Kerning"},{"location":"ft2-pfr_fonts.html#ft_get_pfr_advance","text":"Defined in FT_PFR_H (freetype/ftpfr.h). FT_EXPORT( FT_Error ) FT_Get_PFR_Advance ( FT_Face face, FT_UInt gindex, FT_Pos *aadvance ); Return a given glyph advance, expressed in original metrics units, from a PFR font.","title":"FT_Get_PFR_Advance"},{"location":"ft2-properties.html","text":"FreeType Docs Controlling FreeType Modules Driver properties Driver properties Synopsis Driver modules can be controlled by setting and unsetting properties, using the functions FT_Property_Set and FT_Property_Get . This section documents the available properties, together with auxiliary macros and structures. FT_HINTING_XXX Defined in FT_DRIVER_H (freetype/ftdriver.h). # define FT_HINTING_FREETYPE 0 # define FT_HINTING_ADOBE 1 /* these constants (introduced in 2.4.12) are deprecated */ # define FT_CFF_HINTING_FREETYPE FT_HINTING_FREETYPE # define FT_CFF_HINTING_ADOBE FT_HINTING_ADOBE A list of constants used for the hinting-engine property to select the hinting engine for CFF, Type 1, and CID fonts. values FT_HINTING_FREETYPE Use the old FreeType hinting engine. FT_HINTING_ADOBE Use the hinting engine contributed by Adobe. since 2.9 hinting-engine Thanks to Adobe, which contributed a new hinting (and parsing) engine, an application can select between freetype and adobe if compiled with CFF_CONFIG_OPTION_OLD_ENGINE . If this configuration macro isn't defined, hinting-engine does nothing. The same holds for the Type 1 and CID modules if compiled with T1_CONFIG_OPTION_OLD_ENGINE . For the cff module, the default engine is freetype if CFF_CONFIG_OPTION_OLD_ENGINE is defined, and adobe otherwise. For both the type1 and t1cid modules, the default engine is freetype if T1_CONFIG_OPTION_OLD_ENGINE is defined, and adobe otherwise. note This property can be used with FT_Property_Get also. This property can be set via the FREETYPE_PROPERTIES environment variable (using values adobe or freetype ). example The following example code demonstrates how to select Adobe's hinting engine for the cff module (omitting the error handling). FT_Library library; FT_UInt hinting_engine = FT_HINTING_ADOBE; FT_Init_FreeType( library ); FT_Property_Set( library, cff , hinting-engine , hinting_engine ); since 2.4.12 (for cff module) 2.9 (for type1 and t1cid modules) no-stem-darkening All glyphs that pass through the auto-hinter will be emboldened unless this property is set to TRUE. The same is true for the CFF, Type 1, and CID font modules if the Adobe engine is selected (which is the default). Stem darkening emboldens glyphs at smaller sizes to make them more readable on common low-DPI screens when using linear alpha blending and gamma correction, see FT_Render_Glyph . When not using linear alpha blending and gamma correction, glyphs will appear heavy and fuzzy! Gamma correction essentially lightens fonts since shades of grey are shifted to higher pixel values (= higher brightness) to match the original intention to the reality of our screens. The side-effect is that glyphs thin out . Mac OS X and Adobe's proprietary font rendering library implement a counter-measure: stem darkening at smaller sizes where shades of gray dominate. By emboldening a glyph slightly in relation to its pixel size, individual pixels get higher coverage of filled-in outlines and are therefore blacker . This counteracts the thinning out of glyphs, making text remain readable at smaller sizes. By default, the Adobe engines for CFF, Type 1, and CID fonts darken stems at smaller sizes, regardless of hinting, to enhance contrast. Setting this property, stem darkening gets switched off. For the auto-hinter, stem-darkening is experimental currently and thus switched off by default (this is, no-stem-darkening is set to TRUE by default). Total consistency with the CFF driver is not achieved right now because the emboldening method differs and glyphs must be scaled down on the Y-axis to keep outline points inside their precomputed blue zones. The smaller the size (especially 9ppem and down), the higher the loss of emboldening versus the CFF driver. Note that stem darkening is never applied if FT_LOAD_NO_SCALE is set. note This property can be used with FT_Property_Get also. This property can be set via the FREETYPE_PROPERTIES environment variable (using values 1 and 0 for on and off , respectively). It can also be set per face using FT_Face_Properties with FT_PARAM_TAG_STEM_DARKENING . example FT_Library library; FT_Bool no_stem_darkening = TRUE; FT_Init_FreeType( library ); FT_Property_Set( library, cff , no-stem-darkening , no_stem_darkening ); since 2.4.12 (for cff module) 2.6.2 (for autofitter module) 2.9 (for type1 and t1cid modules) darkening-parameters By default, the Adobe hinting engine, as used by the CFF, Type 1, and CID font drivers, darkens stems as follows (if the no-stem-darkening property isn't set): stem width = 0.5px: darkening amount = 0.4px stem width = 1px: darkening amount = 0.275px stem width = 1.667px: darkening amount = 0.275px stem width = 2.333px: darkening amount = 0px and piecewise linear in-between. At configuration time, these four control points can be set with the macro CFF_CONFIG_OPTION_DARKENING_PARAMETERS ; the CFF, Type 1, and CID drivers share these values. At runtime, the control points can be changed using the darkening-parameters property (see the example below that demonstrates this for the Type 1 driver). The x values give the stem width, and the y values the darkening amount. The unit is 1000 th of pixels. All coordinate values must be positive; the x values must be monotonically increasing; the y values must be monotonically decreasing and smaller than or equal to 500 (corresponding to half a pixel); the slope of each linear piece must be shallower than -1 (e.g., -.4). The auto-hinter provides this property, too, as an experimental feature. See no-stem-darkening for more. note This property can be used with FT_Property_Get also. This property can be set via the FREETYPE_PROPERTIES environment variable, using eight comma-separated integers without spaces. Here the above example, using \\ to break the line for readability. FREETYPE_PROPERTIES=\\ type1:darkening-parameters=500,300,1000,200,1500,100,2000,0 example FT_Library library; FT_Int darken_params[8] = { 500, 300, // x1, y1 1000, 200, // x2, y2 1500, 100, // x3, y3 2000, 0 }; // x4, y4 FT_Init_FreeType( library ); FT_Property_Set( library, type1 , darkening-parameters , darken_params ); since 2.5.1 (for cff module) 2.6.2 (for autofitter module) 2.9 (for type1 and t1cid modules) random-seed By default, the seed value for the CFF random operator and the similar 0 28 callothersubr pop command for the Type 1 and CID drivers is set to a random value. However, mainly for debugging purposes, it is often necessary to use a known value as a seed so that the pseudo-random number sequences generated by random are repeatable. The random-seed property does that. Its argument is a signed 32bit integer; if the value is zero or negative, the seed given by the intitialRandomSeed private DICT operator in a CFF file gets used (or a default value if there is no such operator). If the value is positive, use it instead of initialRandomSeed , which is consequently ignored. note This property can be set via the FREETYPE_PROPERTIES environment variable. It can also be set per face using FT_Face_Properties with FT_PARAM_TAG_RANDOM_SEED . since 2.8 (for cff module) 2.9 (for type1 and t1cid modules) no-long-family-names If PCF_CONFIG_OPTION_LONG_FAMILY_NAMES is active while compiling FreeType, the PCF driver constructs long family names. There are many PCF fonts just called Fixed which look completely different, and which have nothing to do with each other. When selecting Fixed in KDE or Gnome one gets results that appear rather random, the style changes often if one changes the size and one cannot select some fonts at all. The improve this situation, the PCF module prepends the foundry name (plus a space) to the family name. It also checks whether there are wide characters; all put together, family names like Sony Fixed or Misc Fixed Wide are constructed. If no-long-family-names is set, this feature gets switched off. note This property can be used with FT_Property_Get also. This property can be set via the FREETYPE_PROPERTIES environment variable (using values 1 and 0 for on and off , respectively). example FT_Library library; FT_Bool no_long_family_names = TRUE; FT_Init_FreeType( library ); FT_Property_Set( library, pcf , no-long-family-names , no_long_family_names ); since 2.8 TT_INTERPRETER_VERSION_XXX Defined in FT_DRIVER_H (freetype/ftdriver.h). # define TT_INTERPRETER_VERSION_35 35 # define TT_INTERPRETER_VERSION_38 38 # define TT_INTERPRETER_VERSION_40 40 A list of constants used for the interpreter-version property to select the hinting engine for Truetype fonts. The numeric value in the constant names represents the version number as returned by the GETINFO bytecode instruction. values TT_INTERPRETER_VERSION_35 Version 35 corresponds to MS rasterizer v.1.7 as used e.g. in Windows 98; only grayscale and B/W rasterizing is supported. TT_INTERPRETER_VERSION_38 Version 38 corresponds to MS rasterizer v.1.9; it is roughly equivalent to the hinting provided by DirectWrite ClearType (as can be found, for example, in the Internet Explorer 9 running on Windows 7). It is used in FreeType to select the Infinality subpixel hinting code. The code may be removed in a future version. TT_INTERPRETER_VERSION_40 Version 40 corresponds to MS rasterizer v.2.1; it is roughly equivalent to the hinting provided by DirectWrite ClearType (as can be found, for example, in Microsoft's Edge Browser on Windows 10). It is used in FreeType to select the minimal subpixel hinting code, a stripped-down and higher performance version of the Infinality code. note This property controls the behaviour of the bytecode interpreter and thus how outlines get hinted. It does not control how glyph get rasterized! In particular, it does not control subpixel color filtering. If FreeType has not been compiled with the configuration option TT_CONFIG_OPTION_SUBPIXEL_HINTING , selecting version 38 or 40 causes an FT_Err_Unimplemented_Feature error. Depending on the graphics framework, Microsoft uses different bytecode and rendering engines. As a consequence, the version numbers returned by a call to the GETINFO bytecode instruction are more convoluted than desired. Here are two tables that try to shed some light on the possible values for the MS rasterizer engine, together with the additional features introduced by it. GETINFO framework version feature ------------------------------------------------------------------- 3 GDI (Win 3.1), v1.0 16-bit, first version TrueImage 33 GDI (Win NT 3.1), v1.5 32-bit HP Laserjet 34 GDI (Win 95) v1.6 font smoothing, new SCANTYPE opcode 35 GDI (Win 98/2000) v1.7 (UN)SCALED_COMPONENT_OFFSET bits in composite glyphs 36 MGDI (Win CE 2) v1.6+ classic ClearType 37 GDI (XP and later), v1.8 ClearType GDI+ old (before Vista) 38 GDI+ old (Vista, Win 7), v1.9 subpixel ClearType, WPF Y-direction ClearType, additional error checking 39 DWrite (before Win 8) v2.0 subpixel ClearType flags in GETINFO opcode, bug fixes 40 GDI+ (after Win 7), v2.1 Y-direction ClearType flag DWrite (Win 8) in GETINFO opcode, Gray ClearType The version field gives a rough orientation only, since some applications provided certain features much earlier (as an example, Microsoft Reader used subpixel and Y-direction ClearType already in Windows 2000). Similarly, updates to a given framework might include improved hinting support. version sampling rendering comment x y x y -------------------------------------------------------------- v1.0 normal normal B/W B/W bi-level v1.6 high high gray gray grayscale v1.8 high normal color-filter B/W (GDI) ClearType v1.9 high high color-filter gray Color ClearType v2.1 high normal gray B/W Gray ClearType v2.1 high high gray gray Gray ClearType Color and Gray ClearType are the two available variants of Y-direction ClearType , meaning grayscale rasterization along the Y-direction; the name used in the TrueType specification for this feature is symmetric smoothing . Classic ClearType is the original algorithm used before introducing a modified version in Win XP. Another name for v1.6's grayscale rendering is font smoothing , and Color ClearType is sometimes also called DWrite ClearType . To differentiate between today's Color ClearType and the earlier ClearType variant with B/W rendering along the vertical axis, the latter is sometimes called GDI ClearType . Normal and high sampling describe the (virtual) resolution to access the rasterized outline after the hinting process. Normal means 1 sample per grid line (i.e., B/W). In the current Microsoft implementation, high means an extra virtual resolution of 16x16 (or 16x1) grid lines per pixel for bytecode instructions like MIRP . After hinting, these 16 grid lines are mapped to 6x5 (or 6x1) grid lines for color filtering if Color ClearType is activated. Note that Gray ClearType is essentially the same as v1.6's grayscale rendering. However, the GETINFO instruction handles it differently: v1.6 returns bit 12 (hinting for grayscale), while v2.1 returns bits 13 (hinting for ClearType), 18 (symmetrical smoothing), and 19 (Gray ClearType). Also, this mode respects bits 2 and 3 for the version 1 gasp table exclusively (like Color ClearType), while v1.6 only respects the values of version 0 (bits 0 and 1). Keep in mind that the features of the above interpreter versions might not map exactly to FreeType features or behavior because it is a fundamentally different library with different internals. interpreter-version Currently, three versions are available, two representing the bytecode interpreter with subpixel hinting support (old Infinality code and new stripped-down and higher performance minimal code) and one without, respectively. The default is subpixel support if TT_CONFIG_OPTION_SUBPIXEL_HINTING is defined, and no subpixel support otherwise (since it isn't available then). If subpixel hinting is on, many TrueType bytecode instructions behave differently compared to B/W or grayscale rendering (except if native ClearType is selected by the font). Microsoft's main idea is to render at a much increased horizontal resolution, then sampling down the created output to subpixel precision. However, many older fonts are not suited to this and must be specially taken care of by applying (hardcoded) tweaks in Microsoft's interpreter. Details on subpixel hinting and some of the necessary tweaks can be found in Greg Hitchcock's whitepaper at https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx . Note that FreeType currently doesn't really subpixel hint (6x1, 6x2, or 6x5 supersampling) like discussed in the paper. Depending on the chosen interpreter, it simply ignores instructions on vertical stems to arrive at very similar results. note This property can be used with FT_Property_Get also. This property can be set via the FREETYPE_PROPERTIES environment variable (using values 35 , 38 , or 40 ). example The following example code demonstrates how to deactivate subpixel hinting (omitting the error handling). FT_Library library; FT_Face face; FT_UInt interpreter_version = TT_INTERPRETER_VERSION_35; FT_Init_FreeType( library ); FT_Property_Set( library, truetype , interpreter-version , interpreter_version ); since 2.5 glyph-to-script-map Experimental only The auto-hinter provides various script modules to hint glyphs. Examples of supported scripts are Latin or CJK. Before a glyph is auto-hinted, the Unicode character map of the font gets examined, and the script is then determined based on Unicode character ranges, see below. OpenType fonts, however, often provide much more glyphs than character codes (small caps, superscripts, ligatures, swashes, etc.), to be controlled by so-called features . Handling OpenType features can be quite complicated and thus needs a separate library on top of FreeType. The mapping between glyph indices and scripts (in the auto-hinter sense, see the FT_AUTOHINTER_SCRIPT_XXX values) is stored as an array with num_glyphs elements, as found in the font's FT_Face structure. The glyph-to-script-map property returns a pointer to this array, which can be modified as needed. Note that the modification should happen before the first glyph gets processed by the auto-hinter so that the global analysis of the font shapes actually uses the modified mapping. example The following example code demonstrates how to access it (omitting the error handling). FT_Library library; FT_Face face; FT_Prop_GlyphToScriptMap prop; FT_Init_FreeType( library ); FT_New_Face( library, foo.ttf , 0, face ); prop.face = face; FT_Property_Get( library, autofitter , glyph-to-script-map , prop ); // adjust `prop.map as needed right here FT_Load_Glyph( face, ..., FT_LOAD_FORCE_AUTOHINT ); since 2.4.11 FT_AUTOHINTER_SCRIPT_XXX Defined in FT_DRIVER_H (freetype/ftdriver.h). # define FT_AUTOHINTER_SCRIPT_NONE 0 # define FT_AUTOHINTER_SCRIPT_LATIN 1 # define FT_AUTOHINTER_SCRIPT_CJK 2 # define FT_AUTOHINTER_SCRIPT_INDIC 3 Experimental only A list of constants used for the glyph-to-script-map property to specify the script submodule the auto-hinter should use for hinting a particular glyph. values FT_AUTOHINTER_SCRIPT_NONE Don't auto-hint this glyph. FT_AUTOHINTER_SCRIPT_LATIN Apply the latin auto-hinter. For the auto-hinter, latin is a very broad term, including Cyrillic and Greek also since characters from those scripts share the same design constraints. By default, characters from the following Unicode ranges are assigned to this submodule. U+0020 - U+007F // Basic Latin (no control characters) U+00A0 - U+00FF // Latin-1 Supplement (no control characters) U+0100 - U+017F // Latin Extended-A U+0180 - U+024F // Latin Extended-B U+0250 - U+02AF // IPA Extensions U+02B0 - U+02FF // Spacing Modifier Letters U+0300 - U+036F // Combining Diacritical Marks U+0370 - U+03FF // Greek and Coptic U+0400 - U+04FF // Cyrillic U+0500 - U+052F // Cyrillic Supplement U+1D00 - U+1D7F // Phonetic Extensions U+1D80 - U+1DBF // Phonetic Extensions Supplement U+1DC0 - U+1DFF // Combining Diacritical Marks Supplement U+1E00 - U+1EFF // Latin Extended Additional U+1F00 - U+1FFF // Greek Extended U+2000 - U+206F // General Punctuation U+2070 - U+209F // Superscripts and Subscripts U+20A0 - U+20CF // Currency Symbols U+2150 - U+218F // Number Forms U+2460 - U+24FF // Enclosed Alphanumerics U+2C60 - U+2C7F // Latin Extended-C U+2DE0 - U+2DFF // Cyrillic Extended-A U+2E00 - U+2E7F // Supplemental Punctuation U+A640 - U+A69F // Cyrillic Extended-B U+A720 - U+A7FF // Latin Extended-D U+FB00 - U+FB06 // Alphab. Present. Forms (Latin Ligatures) U+1D400 - U+1D7FF // Mathematical Alphanumeric Symbols U+1F100 - U+1F1FF // Enclosed Alphanumeric Supplement FT_AUTOHINTER_SCRIPT_CJK Apply the CJK auto-hinter, covering Chinese, Japanese, Korean, old Vietnamese, and some other scripts. By default, characters from the following Unicode ranges are assigned to this submodule. U+1100 - U+11FF // Hangul Jamo U+2E80 - U+2EFF // CJK Radicals Supplement U+2F00 - U+2FDF // Kangxi Radicals U+2FF0 - U+2FFF // Ideographic Description Characters U+3000 - U+303F // CJK Symbols and Punctuation U+3040 - U+309F // Hiragana U+30A0 - U+30FF // Katakana U+3100 - U+312F // Bopomofo U+3130 - U+318F // Hangul Compatibility Jamo U+3190 - U+319F // Kanbun U+31A0 - U+31BF // Bopomofo Extended U+31C0 - U+31EF // CJK Strokes U+31F0 - U+31FF // Katakana Phonetic Extensions U+3200 - U+32FF // Enclosed CJK Letters and Months U+3300 - U+33FF // CJK Compatibility U+3400 - U+4DBF // CJK Unified Ideographs Extension A U+4DC0 - U+4DFF // Yijing Hexagram Symbols U+4E00 - U+9FFF // CJK Unified Ideographs U+A960 - U+A97F // Hangul Jamo Extended-A U+AC00 - U+D7AF // Hangul Syllables U+D7B0 - U+D7FF // Hangul Jamo Extended-B U+F900 - U+FAFF // CJK Compatibility Ideographs U+FE10 - U+FE1F // Vertical forms U+FE30 - U+FE4F // CJK Compatibility Forms U+FF00 - U+FFEF // Halfwidth and Fullwidth Forms U+1B000 - U+1B0FF // Kana Supplement U+1D300 - U+1D35F // Tai Xuan Hing Symbols U+1F200 - U+1F2FF // Enclosed Ideographic Supplement U+20000 - U+2A6DF // CJK Unified Ideographs Extension B U+2A700 - U+2B73F // CJK Unified Ideographs Extension C U+2B740 - U+2B81F // CJK Unified Ideographs Extension D U+2F800 - U+2FA1F // CJK Compatibility Ideographs Supplement FT_AUTOHINTER_SCRIPT_INDIC Apply the indic auto-hinter, covering all major scripts from the Indian sub-continent and some other related scripts like Thai, Lao, or Tibetan. By default, characters from the following Unicode ranges are assigned to this submodule. U+0900 - U+0DFF // Indic Range U+0F00 - U+0FFF // Tibetan U+1900 - U+194F // Limbu U+1B80 - U+1BBF // Sundanese U+A800 - U+A82F // Syloti Nagri U+ABC0 - U+ABFF // Meetei Mayek U+11800 - U+118DF // Sharada Note that currently Indic support is rudimentary only, missing blue zone support. since 2.4.11 FT_Prop_GlyphToScriptMap Defined in FT_DRIVER_H (freetype/ftdriver.h). typedef struct FT_Prop_GlyphToScriptMap_ { FT_Face face; FT_UShort * map; } FT_Prop_GlyphToScriptMap ; Experimental only The data exchange structure for the glyph-to-script-map property. since 2.4.11 fallback-script Experimental only If no auto-hinter script module can be assigned to a glyph, a fallback script gets assigned to it (see also the glyph-to-script-map property). By default, this is FT_AUTOHINTER_SCRIPT_CJK . Using the fallback-script property, this fallback value can be changed. note This property can be used with FT_Property_Get also. It's important to use the right timing for changing this value: The creation of the glyph-to-script map that eventually uses the fallback script value gets triggered either by setting or reading a face-specific property like glyph-to-script-map , or by auto-hinting any glyph from that face. In particular, if you have already created an FT_Face structure but not loaded any glyph (using the auto-hinter), a change of the fallback script will affect this face. example FT_Library library; FT_UInt fallback_script = FT_AUTOHINTER_SCRIPT_NONE; FT_Init_FreeType( library ); FT_Property_Set( library, autofitter , fallback-script , fallback_script ); since 2.4.11 default-script Experimental only If FreeType gets compiled with FT_CONFIG_OPTION_USE_HARFBUZZ to make the HarfBuzz library access OpenType features for getting better glyph coverages, this property sets the (auto-fitter) script to be used for the default (OpenType) script data of a font's GSUB table. Features for the default script are intended for all scripts not explicitly handled in GSUB; an example is a dlig feature, containing the combination of the characters T , E , and L to form a TEL ligature. By default, this is FT_AUTOHINTER_SCRIPT_LATIN . Using the default-script property, this default value can be changed. note This property can be used with FT_Property_Get also. It's important to use the right timing for changing this value: The creation of the glyph-to-script map that eventually uses the default script value gets triggered either by setting or reading a face-specific property like glyph-to-script-map , or by auto-hinting any glyph from that face. In particular, if you have already created an FT_Face structure but not loaded any glyph (using the auto-hinter), a change of the default script will affect this face. example FT_Library library; FT_UInt default_script = FT_AUTOHINTER_SCRIPT_NONE; FT_Init_FreeType( library ); FT_Property_Set( library, autofitter , default-script , default_script ); since 2.5.3 increase-x-height For ppem values in the range 6 = ppem = increase-x-height , round up the font's x height much more often than normally. If the value is set to 0, which is the default, this feature is switched off. Use this property to improve the legibility of small font sizes if necessary. note This property can be used with FT_Property_Get also. Set this value right after calling FT_Set_Char_Size , but before loading any glyph (using the auto-hinter). example FT_Library library; FT_Face face; FT_Prop_IncreaseXHeight prop; FT_Init_FreeType( library ); FT_New_Face( library, foo.ttf , 0, face ); FT_Set_Char_Size( face, 10 * 64, 0, 72, 0 ); prop.face = face; prop.limit = 14; FT_Property_Set( library, autofitter , increase-x-height , prop ); since 2.4.11 FT_Prop_IncreaseXHeight Defined in FT_DRIVER_H (freetype/ftdriver.h). typedef struct FT_Prop_IncreaseXHeight_ { FT_Face face; FT_UInt limit; } FT_Prop_IncreaseXHeight ; The data exchange structure for the increase-x-height property. warping Experimental only If FreeType gets compiled with option AF_CONFIG_OPTION_USE_WARPER to activate the warp hinting code in the auto-hinter, this property switches warping on and off. Warping only works in normal auto-hinting mode replacing it. The idea of the code is to slightly scale and shift a glyph along the non-hinted dimension (which is usually the horizontal axis) so that as much of its segments are aligned (more or less) to the grid. To find out a glyph's optimal scaling and shifting value, various parameter combinations are tried and scored. By default, warping is off. note This property can be used with FT_Property_Get also. This property can be set via the FREETYPE_PROPERTIES environment variable (using values 1 and 0 for on and off , respectively). The warping code can also change advance widths. Have a look at the lsb_delta and rsb_delta fields in the FT_GlyphSlotRec structure for details on improving inter-glyph distances while rendering. Since warping is a global property of the auto-hinter it is best to change its value before rendering any face. Otherwise, you should reload all faces that get auto-hinted in normal hinting mode. example This example shows how to switch on warping (omitting the error handling). FT_Library library; FT_Bool warping = 1; FT_Init_FreeType( library ); FT_Property_Set( library, autofitter , warping , warping ); since 2.6","title":"Driver properties"},{"location":"ft2-properties.html#driver-properties","text":"","title":"Driver properties"},{"location":"ft2-properties.html#synopsis","text":"Driver modules can be controlled by setting and unsetting properties, using the functions FT_Property_Set and FT_Property_Get . This section documents the available properties, together with auxiliary macros and structures.","title":"Synopsis"},{"location":"ft2-properties.html#ft_hinting_xxx","text":"Defined in FT_DRIVER_H (freetype/ftdriver.h). # define FT_HINTING_FREETYPE 0 # define FT_HINTING_ADOBE 1 /* these constants (introduced in 2.4.12) are deprecated */ # define FT_CFF_HINTING_FREETYPE FT_HINTING_FREETYPE # define FT_CFF_HINTING_ADOBE FT_HINTING_ADOBE A list of constants used for the hinting-engine property to select the hinting engine for CFF, Type 1, and CID fonts.","title":"FT_HINTING_XXX"},{"location":"ft2-properties.html#hinting-engine","text":"Thanks to Adobe, which contributed a new hinting (and parsing) engine, an application can select between freetype and adobe if compiled with CFF_CONFIG_OPTION_OLD_ENGINE . If this configuration macro isn't defined, hinting-engine does nothing. The same holds for the Type 1 and CID modules if compiled with T1_CONFIG_OPTION_OLD_ENGINE . For the cff module, the default engine is freetype if CFF_CONFIG_OPTION_OLD_ENGINE is defined, and adobe otherwise. For both the type1 and t1cid modules, the default engine is freetype if T1_CONFIG_OPTION_OLD_ENGINE is defined, and adobe otherwise.","title":"hinting-engine"},{"location":"ft2-properties.html#no-stem-darkening","text":"All glyphs that pass through the auto-hinter will be emboldened unless this property is set to TRUE. The same is true for the CFF, Type 1, and CID font modules if the Adobe engine is selected (which is the default). Stem darkening emboldens glyphs at smaller sizes to make them more readable on common low-DPI screens when using linear alpha blending and gamma correction, see FT_Render_Glyph . When not using linear alpha blending and gamma correction, glyphs will appear heavy and fuzzy! Gamma correction essentially lightens fonts since shades of grey are shifted to higher pixel values (= higher brightness) to match the original intention to the reality of our screens. The side-effect is that glyphs thin out . Mac OS X and Adobe's proprietary font rendering library implement a counter-measure: stem darkening at smaller sizes where shades of gray dominate. By emboldening a glyph slightly in relation to its pixel size, individual pixels get higher coverage of filled-in outlines and are therefore blacker . This counteracts the thinning out of glyphs, making text remain readable at smaller sizes. By default, the Adobe engines for CFF, Type 1, and CID fonts darken stems at smaller sizes, regardless of hinting, to enhance contrast. Setting this property, stem darkening gets switched off. For the auto-hinter, stem-darkening is experimental currently and thus switched off by default (this is, no-stem-darkening is set to TRUE by default). Total consistency with the CFF driver is not achieved right now because the emboldening method differs and glyphs must be scaled down on the Y-axis to keep outline points inside their precomputed blue zones. The smaller the size (especially 9ppem and down), the higher the loss of emboldening versus the CFF driver. Note that stem darkening is never applied if FT_LOAD_NO_SCALE is set.","title":"no-stem-darkening"},{"location":"ft2-properties.html#darkening-parameters","text":"By default, the Adobe hinting engine, as used by the CFF, Type 1, and CID font drivers, darkens stems as follows (if the no-stem-darkening property isn't set): stem width = 0.5px: darkening amount = 0.4px stem width = 1px: darkening amount = 0.275px stem width = 1.667px: darkening amount = 0.275px stem width = 2.333px: darkening amount = 0px and piecewise linear in-between. At configuration time, these four control points can be set with the macro CFF_CONFIG_OPTION_DARKENING_PARAMETERS ; the CFF, Type 1, and CID drivers share these values. At runtime, the control points can be changed using the darkening-parameters property (see the example below that demonstrates this for the Type 1 driver). The x values give the stem width, and the y values the darkening amount. The unit is 1000 th of pixels. All coordinate values must be positive; the x values must be monotonically increasing; the y values must be monotonically decreasing and smaller than or equal to 500 (corresponding to half a pixel); the slope of each linear piece must be shallower than -1 (e.g., -.4). The auto-hinter provides this property, too, as an experimental feature. See no-stem-darkening for more.","title":"darkening-parameters"},{"location":"ft2-properties.html#random-seed","text":"By default, the seed value for the CFF random operator and the similar 0 28 callothersubr pop command for the Type 1 and CID drivers is set to a random value. However, mainly for debugging purposes, it is often necessary to use a known value as a seed so that the pseudo-random number sequences generated by random are repeatable. The random-seed property does that. Its argument is a signed 32bit integer; if the value is zero or negative, the seed given by the intitialRandomSeed private DICT operator in a CFF file gets used (or a default value if there is no such operator). If the value is positive, use it instead of initialRandomSeed , which is consequently ignored.","title":"random-seed"},{"location":"ft2-properties.html#no-long-family-names","text":"If PCF_CONFIG_OPTION_LONG_FAMILY_NAMES is active while compiling FreeType, the PCF driver constructs long family names. There are many PCF fonts just called Fixed which look completely different, and which have nothing to do with each other. When selecting Fixed in KDE or Gnome one gets results that appear rather random, the style changes often if one changes the size and one cannot select some fonts at all. The improve this situation, the PCF module prepends the foundry name (plus a space) to the family name. It also checks whether there are wide characters; all put together, family names like Sony Fixed or Misc Fixed Wide are constructed. If no-long-family-names is set, this feature gets switched off.","title":"no-long-family-names"},{"location":"ft2-properties.html#tt_interpreter_version_xxx","text":"Defined in FT_DRIVER_H (freetype/ftdriver.h). # define TT_INTERPRETER_VERSION_35 35 # define TT_INTERPRETER_VERSION_38 38 # define TT_INTERPRETER_VERSION_40 40 A list of constants used for the interpreter-version property to select the hinting engine for Truetype fonts. The numeric value in the constant names represents the version number as returned by the GETINFO bytecode instruction.","title":"TT_INTERPRETER_VERSION_XXX"},{"location":"ft2-properties.html#interpreter-version","text":"Currently, three versions are available, two representing the bytecode interpreter with subpixel hinting support (old Infinality code and new stripped-down and higher performance minimal code) and one without, respectively. The default is subpixel support if TT_CONFIG_OPTION_SUBPIXEL_HINTING is defined, and no subpixel support otherwise (since it isn't available then). If subpixel hinting is on, many TrueType bytecode instructions behave differently compared to B/W or grayscale rendering (except if native ClearType is selected by the font). Microsoft's main idea is to render at a much increased horizontal resolution, then sampling down the created output to subpixel precision. However, many older fonts are not suited to this and must be specially taken care of by applying (hardcoded) tweaks in Microsoft's interpreter. Details on subpixel hinting and some of the necessary tweaks can be found in Greg Hitchcock's whitepaper at https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx . Note that FreeType currently doesn't really subpixel hint (6x1, 6x2, or 6x5 supersampling) like discussed in the paper. Depending on the chosen interpreter, it simply ignores instructions on vertical stems to arrive at very similar results.","title":"interpreter-version"},{"location":"ft2-properties.html#glyph-to-script-map","text":"Experimental only The auto-hinter provides various script modules to hint glyphs. Examples of supported scripts are Latin or CJK. Before a glyph is auto-hinted, the Unicode character map of the font gets examined, and the script is then determined based on Unicode character ranges, see below. OpenType fonts, however, often provide much more glyphs than character codes (small caps, superscripts, ligatures, swashes, etc.), to be controlled by so-called features . Handling OpenType features can be quite complicated and thus needs a separate library on top of FreeType. The mapping between glyph indices and scripts (in the auto-hinter sense, see the FT_AUTOHINTER_SCRIPT_XXX values) is stored as an array with num_glyphs elements, as found in the font's FT_Face structure. The glyph-to-script-map property returns a pointer to this array, which can be modified as needed. Note that the modification should happen before the first glyph gets processed by the auto-hinter so that the global analysis of the font shapes actually uses the modified mapping.","title":"glyph-to-script-map"},{"location":"ft2-properties.html#ft_autohinter_script_xxx","text":"Defined in FT_DRIVER_H (freetype/ftdriver.h). # define FT_AUTOHINTER_SCRIPT_NONE 0 # define FT_AUTOHINTER_SCRIPT_LATIN 1 # define FT_AUTOHINTER_SCRIPT_CJK 2 # define FT_AUTOHINTER_SCRIPT_INDIC 3 Experimental only A list of constants used for the glyph-to-script-map property to specify the script submodule the auto-hinter should use for hinting a particular glyph.","title":"FT_AUTOHINTER_SCRIPT_XXX"},{"location":"ft2-properties.html#ft_prop_glyphtoscriptmap","text":"Defined in FT_DRIVER_H (freetype/ftdriver.h). typedef struct FT_Prop_GlyphToScriptMap_ { FT_Face face; FT_UShort * map; } FT_Prop_GlyphToScriptMap ; Experimental only The data exchange structure for the glyph-to-script-map property.","title":"FT_Prop_GlyphToScriptMap"},{"location":"ft2-properties.html#fallback-script","text":"Experimental only If no auto-hinter script module can be assigned to a glyph, a fallback script gets assigned to it (see also the glyph-to-script-map property). By default, this is FT_AUTOHINTER_SCRIPT_CJK . Using the fallback-script property, this fallback value can be changed.","title":"fallback-script"},{"location":"ft2-properties.html#default-script","text":"Experimental only If FreeType gets compiled with FT_CONFIG_OPTION_USE_HARFBUZZ to make the HarfBuzz library access OpenType features for getting better glyph coverages, this property sets the (auto-fitter) script to be used for the default (OpenType) script data of a font's GSUB table. Features for the default script are intended for all scripts not explicitly handled in GSUB; an example is a dlig feature, containing the combination of the characters T , E , and L to form a TEL ligature. By default, this is FT_AUTOHINTER_SCRIPT_LATIN . Using the default-script property, this default value can be changed.","title":"default-script"},{"location":"ft2-properties.html#increase-x-height","text":"For ppem values in the range 6 = ppem = increase-x-height , round up the font's x height much more often than normally. If the value is set to 0, which is the default, this feature is switched off. Use this property to improve the legibility of small font sizes if necessary.","title":"increase-x-height"},{"location":"ft2-properties.html#ft_prop_increasexheight","text":"Defined in FT_DRIVER_H (freetype/ftdriver.h). typedef struct FT_Prop_IncreaseXHeight_ { FT_Face face; FT_UInt limit; } FT_Prop_IncreaseXHeight ; The data exchange structure for the increase-x-height property.","title":"FT_Prop_IncreaseXHeight"},{"location":"ft2-properties.html#warping","text":"Experimental only If FreeType gets compiled with option AF_CONFIG_OPTION_USE_WARPER to activate the warp hinting code in the auto-hinter, this property switches warping on and off. Warping only works in normal auto-hinting mode replacing it. The idea of the code is to slightly scale and shift a glyph along the non-hinted dimension (which is usually the horizontal axis) so that as much of its segments are aligned (more or less) to the grid. To find out a glyph's optimal scaling and shifting value, various parameter combinations are tried and scored. By default, warping is off.","title":"warping"},{"location":"ft2-quick_advance.html","text":"FreeType Docs Support API Quick retrieval of advance values Quick retrieval of advance values Synopsis This section contains functions to quickly extract advance values without handling glyph outlines, if possible. FT_Get_Advance Defined in FT_ADVANCES_H (freetype/ftadvanc.h). FT_EXPORT( FT_Error ) FT_Get_Advance ( FT_Face face, FT_UInt gindex, FT_Int32 load_flags, FT_Fixed *padvance ); Retrieve the advance value of a given glyph outline in an FT_Face . input face The source FT_Face handle. gindex The glyph index. load_flags A set of bit flags similar to those used when calling FT_Load_Glyph , used to determine what kind of advances you need. output padvance The advance value. If scaling is performed (based on the value of load_flags ), the advance value is in 16.16 format. Otherwise, it is in font units. If FT_LOAD_VERTICAL_LAYOUT is set, this is the vertical advance corresponding to a vertical layout. Otherwise, it is the horizontal advance in a horizontal layout. return FreeType error code. 0 means success. note This function may fail if you use FT_ADVANCE_FLAG_FAST_ONLY and if the corresponding font backend doesn't have a quick way to retrieve the advances. A scaled advance is returned in 16.16 format but isn't transformed by the affine transformation specified by FT_Set_Transform . FT_Get_Advances Defined in FT_ADVANCES_H (freetype/ftadvanc.h). FT_EXPORT( FT_Error ) FT_Get_Advances ( FT_Face face, FT_UInt start, FT_UInt count, FT_Int32 load_flags, FT_Fixed *padvances ); Retrieve the advance values of several glyph outlines in an FT_Face . input face The source FT_Face handle. start The first glyph index. count The number of advance values you want to retrieve. load_flags A set of bit flags similar to those used when calling FT_Load_Glyph . output padvance The advance values. This array, to be provided by the caller, must contain at least count elements. If scaling is performed (based on the value of load_flags ), the advance values are in 16.16 format. Otherwise, they are in font units. If FT_LOAD_VERTICAL_LAYOUT is set, these are the vertical advances corresponding to a vertical layout. Otherwise, they are the horizontal advances in a horizontal layout. return FreeType error code. 0 means success. note This function may fail if you use FT_ADVANCE_FLAG_FAST_ONLY and if the corresponding font backend doesn't have a quick way to retrieve the advances. Scaled advances are returned in 16.16 format but aren't transformed by the affine transformation specified by FT_Set_Transform . FT_ADVANCE_FLAG_FAST_ONLY Defined in FT_ADVANCES_H (freetype/ftadvanc.h). # define FT_ADVANCE_FLAG_FAST_ONLY 0x20000000L A bit-flag to be OR-ed with the flags parameter of the FT_Get_Advance and FT_Get_Advances functions. If set, it indicates that you want these functions to fail if the corresponding hinting mode or font driver doesn't allow for very quick advance computation. Typically, glyphs that are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly. Normal and bytecode hinted modes that require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.","title":"Quick retrieval of advance values"},{"location":"ft2-quick_advance.html#quick-retrieval-of-advance-values","text":"","title":"Quick retrieval of advance values"},{"location":"ft2-quick_advance.html#synopsis","text":"This section contains functions to quickly extract advance values without handling glyph outlines, if possible.","title":"Synopsis"},{"location":"ft2-quick_advance.html#ft_get_advance","text":"Defined in FT_ADVANCES_H (freetype/ftadvanc.h). FT_EXPORT( FT_Error ) FT_Get_Advance ( FT_Face face, FT_UInt gindex, FT_Int32 load_flags, FT_Fixed *padvance ); Retrieve the advance value of a given glyph outline in an FT_Face .","title":"FT_Get_Advance"},{"location":"ft2-quick_advance.html#ft_get_advances","text":"Defined in FT_ADVANCES_H (freetype/ftadvanc.h). FT_EXPORT( FT_Error ) FT_Get_Advances ( FT_Face face, FT_UInt start, FT_UInt count, FT_Int32 load_flags, FT_Fixed *padvances ); Retrieve the advance values of several glyph outlines in an FT_Face .","title":"FT_Get_Advances"},{"location":"ft2-quick_advance.html#ft_advance_flag_fast_only","text":"Defined in FT_ADVANCES_H (freetype/ftadvanc.h). # define FT_ADVANCE_FLAG_FAST_ONLY 0x20000000L A bit-flag to be OR-ed with the flags parameter of the FT_Get_Advance and FT_Get_Advances functions. If set, it indicates that you want these functions to fail if the corresponding hinting mode or font driver doesn't allow for very quick advance computation. Typically, glyphs that are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly. Normal and bytecode hinted modes that require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.","title":"FT_ADVANCE_FLAG_FAST_ONLY"},{"location":"ft2-raster.html","text":"FreeType Docs Support API Scanline Converter Scanline Converter Synopsis This section contains technical definitions. FT_Raster Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_RasterRec_* FT_Raster ; An opaque handle (pointer) to a raster object. Each object can be used independently to convert an outline into a bitmap or pixmap. FT_Span Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Span_ { short x; unsigned short len; unsigned char coverage; } FT_Span ; A structure used to model a single span of gray pixels when rendering an anti-aliased bitmap. fields x The span's horizontal start position. len The span's length in pixels. coverage The span color/coverage, ranging from 0 (background) to 255 (foreground). note This structure is used by the span drawing callback type named FT_SpanFunc that takes the y coordinate of the span as a parameter. The coverage value is always between 0 and 255. If you want less gray values, the callback function has to reduce them. FT_SpanFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_SpanFunc )( int y, int count, const FT_Span * spans, void * user ); # define FT_Raster_Span_Func FT_SpanFunc A function used as a call-back by the anti-aliased renderer in order to let client applications draw themselves the gray pixel spans on each scan line. input y The scanline's y coordinate. count The number of spans to draw on this scanline. spans A table of count spans to draw on the scanline. user User-supplied data that is passed to the callback. note This callback allows client applications to directly render the gray spans of the anti-aliased bitmap to any kind of surfaces. This can be used to write anti-aliased outlines directly to a given background bitmap, and even perform translucency. FT_Raster_Params Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Raster_Params_ { const FT_Bitmap * target; const void * source; int flags; FT_SpanFunc gray_spans; FT_SpanFunc black_spans; /* unused */ FT_Raster_BitTest_Func bit_test; /* unused */ FT_Raster_BitSet_Func bit_set; /* unused */ void * user; FT_BBox clip_box; } FT_Raster_Params ; A structure to hold the arguments used by a raster's render function. fields target The target bitmap. source A pointer to the source glyph image (e.g., an FT_Outline ). flags The rendering flags. gray_spans The gray span drawing callback. black_spans Unused. bit_test Unused. bit_set Unused. user User-supplied data that is passed to each drawing callback. clip_box An optional clipping box. It is only used in direct rendering mode. Note that coordinates here should be expressed in integer pixels (and not in 26.6 fixed-point units). note An anti-aliased glyph bitmap is drawn if the FT_RASTER_FLAG_AA bit flag is set in the flags field, otherwise a monochrome bitmap is generated. If the FT_RASTER_FLAG_DIRECT bit flag is set in flags , the raster will call the gray_spans callback to draw gray pixel spans. This allows direct composition over a pre-existing bitmap through user-provided callbacks to perform the span drawing and composition. Not supported by the monochrome rasterizer. FT_RASTER_FLAG_XXX Defined in FT_IMAGE_H (freetype/ftimage.h). # define FT_RASTER_FLAG_DEFAULT 0x0 # define FT_RASTER_FLAG_AA 0x1 # define FT_RASTER_FLAG_DIRECT 0x2 # define FT_RASTER_FLAG_CLIP 0x4 /* these constants are deprecated; use the corresponding */ /* ` FT_RASTER_FLAG_XXX ` values instead */ # define ft_raster_flag_default FT_RASTER_FLAG_DEFAULT # define ft_raster_flag_aa FT_RASTER_FLAG_AA # define ft_raster_flag_direct FT_RASTER_FLAG_DIRECT # define ft_raster_flag_clip FT_RASTER_FLAG_CLIP A list of bit flag constants as used in the flags field of a FT_Raster_Params structure. values FT_RASTER_FLAG_DEFAULT This value is 0. FT_RASTER_FLAG_AA This flag is set to indicate that an anti-aliased glyph image should be generated. Otherwise, it will be monochrome (1-bit). FT_RASTER_FLAG_DIRECT This flag is set to indicate direct rendering. In this mode, client applications must provide their own span callback. This lets them directly draw or compose over an existing bitmap. If this bit is not set, the target pixmap's buffer must be zeroed before rendering. Direct rendering is only possible with anti-aliased glyphs. FT_RASTER_FLAG_CLIP This flag is only used in direct rendering mode. If set, the output will be clipped to a box specified in the clip_box field of the FT_Raster_Params structure. Note that by default, the glyph bitmap is clipped to the target pixmap, except in direct rendering mode where all spans are generated if no clipping box is set. FT_Raster_NewFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_NewFunc )( void * memory, FT_Raster * raster ); # define FT_Raster_New_Func FT_Raster_NewFunc A function used to create a new raster object. input memory A handle to the memory allocator. output raster A handle to the new raster object. return Error code. 0 means success. note The memory parameter is a typeless pointer in order to avoid un-wanted dependencies on the rest of the FreeType code. In practice, it is an FT_Memory object, i.e., a handle to the standard FreeType memory allocator. However, this field can be completely ignored by a given raster implementation. FT_Raster_DoneFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_Raster_DoneFunc )( FT_Raster raster ); # define FT_Raster_Done_Func FT_Raster_DoneFunc A function used to destroy a given raster object. input raster A handle to the raster object. FT_Raster_ResetFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_Raster_ResetFunc )( FT_Raster raster, unsigned char * pool_base, unsigned long pool_size ); # define FT_Raster_Reset_Func FT_Raster_ResetFunc FreeType used to provide an area of memory called the render pool available to all registered rasterizers. This was not thread safe, however, and now FreeType never allocates this pool. This function is called after a new raster object is created. input raster A handle to the new raster object. pool_base Previously, the address in memory of the render pool. Set this to NULL . pool_size Previously, the size in bytes of the render pool. Set this to 0. note Rasterizers should rely on dynamic or stack allocation if they want to (a handle to the memory allocator is passed to the rasterizer constructor). FT_Raster_SetModeFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_SetModeFunc )( FT_Raster raster, unsigned long mode, void * args ); # define FT_Raster_Set_Mode_Func FT_Raster_SetModeFunc This function is a generic facility to change modes or attributes in a given raster. This can be used for debugging purposes, or simply to allow implementation-specific features in a given raster module. input raster A handle to the new raster object. mode A 4-byte tag used to name the mode or property. args A pointer to the new mode/property to use. FT_Raster_RenderFunc Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_RenderFunc )( FT_Raster raster, const FT_Raster_Params * params ); # define FT_Raster_Render_Func FT_Raster_RenderFunc Invoke a given raster to scan-convert a given glyph image into a target bitmap. input raster A handle to the raster object. params A pointer to an FT_Raster_Params structure used to store the rendering parameters. return Error code. 0 means success. note The exact format of the source image depends on the raster's glyph format defined in its FT_Raster_Funcs structure. It can be an FT_Outline or anything else in order to support a large array of glyph formats. Note also that the render function can fail and return a FT_Err_Unimplemented_Feature error code if the raster used does not support direct composition. FT_Raster_Funcs Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Raster_Funcs_ { FT_Glyph_Format glyph_format; FT_Raster_NewFunc raster_new; FT_Raster_ResetFunc raster_reset; FT_Raster_SetModeFunc raster_set_mode; FT_Raster_RenderFunc raster_render; FT_Raster_DoneFunc raster_done; } FT_Raster_Funcs ; A structure used to describe a given raster class to the library. fields glyph_format The supported glyph format for this raster. raster_new The raster constructor. raster_reset Used to reset the render pool within the raster. raster_render A function to render a glyph into a given bitmap. raster_done The raster destructor. FT_Raster_BitTest_Func Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_BitTest_Func )( int y, int x, void * user ); Deprecated, unimplemented. FT_Raster_BitSet_Func Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_Raster_BitSet_Func )( int y, int x, void * user ); Deprecated, unimplemented.","title":"Scanline Converter"},{"location":"ft2-raster.html#scanline-converter","text":"","title":"Scanline Converter"},{"location":"ft2-raster.html#synopsis","text":"This section contains technical definitions.","title":"Synopsis"},{"location":"ft2-raster.html#ft_raster","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_RasterRec_* FT_Raster ; An opaque handle (pointer) to a raster object. Each object can be used independently to convert an outline into a bitmap or pixmap.","title":"FT_Raster"},{"location":"ft2-raster.html#ft_span","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Span_ { short x; unsigned short len; unsigned char coverage; } FT_Span ; A structure used to model a single span of gray pixels when rendering an anti-aliased bitmap.","title":"FT_Span"},{"location":"ft2-raster.html#ft_spanfunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_SpanFunc )( int y, int count, const FT_Span * spans, void * user ); # define FT_Raster_Span_Func FT_SpanFunc A function used as a call-back by the anti-aliased renderer in order to let client applications draw themselves the gray pixel spans on each scan line.","title":"FT_SpanFunc"},{"location":"ft2-raster.html#ft_raster_params","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Raster_Params_ { const FT_Bitmap * target; const void * source; int flags; FT_SpanFunc gray_spans; FT_SpanFunc black_spans; /* unused */ FT_Raster_BitTest_Func bit_test; /* unused */ FT_Raster_BitSet_Func bit_set; /* unused */ void * user; FT_BBox clip_box; } FT_Raster_Params ; A structure to hold the arguments used by a raster's render function.","title":"FT_Raster_Params"},{"location":"ft2-raster.html#ft_raster_flag_xxx","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). # define FT_RASTER_FLAG_DEFAULT 0x0 # define FT_RASTER_FLAG_AA 0x1 # define FT_RASTER_FLAG_DIRECT 0x2 # define FT_RASTER_FLAG_CLIP 0x4 /* these constants are deprecated; use the corresponding */ /* ` FT_RASTER_FLAG_XXX ` values instead */ # define ft_raster_flag_default FT_RASTER_FLAG_DEFAULT # define ft_raster_flag_aa FT_RASTER_FLAG_AA # define ft_raster_flag_direct FT_RASTER_FLAG_DIRECT # define ft_raster_flag_clip FT_RASTER_FLAG_CLIP A list of bit flag constants as used in the flags field of a FT_Raster_Params structure.","title":"FT_RASTER_FLAG_XXX"},{"location":"ft2-raster.html#ft_raster_newfunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_NewFunc )( void * memory, FT_Raster * raster ); # define FT_Raster_New_Func FT_Raster_NewFunc A function used to create a new raster object.","title":"FT_Raster_NewFunc"},{"location":"ft2-raster.html#ft_raster_donefunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_Raster_DoneFunc )( FT_Raster raster ); # define FT_Raster_Done_Func FT_Raster_DoneFunc A function used to destroy a given raster object.","title":"FT_Raster_DoneFunc"},{"location":"ft2-raster.html#ft_raster_resetfunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_Raster_ResetFunc )( FT_Raster raster, unsigned char * pool_base, unsigned long pool_size ); # define FT_Raster_Reset_Func FT_Raster_ResetFunc FreeType used to provide an area of memory called the render pool available to all registered rasterizers. This was not thread safe, however, and now FreeType never allocates this pool. This function is called after a new raster object is created.","title":"FT_Raster_ResetFunc"},{"location":"ft2-raster.html#ft_raster_setmodefunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_SetModeFunc )( FT_Raster raster, unsigned long mode, void * args ); # define FT_Raster_Set_Mode_Func FT_Raster_SetModeFunc This function is a generic facility to change modes or attributes in a given raster. This can be used for debugging purposes, or simply to allow implementation-specific features in a given raster module.","title":"FT_Raster_SetModeFunc"},{"location":"ft2-raster.html#ft_raster_renderfunc","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_RenderFunc )( FT_Raster raster, const FT_Raster_Params * params ); # define FT_Raster_Render_Func FT_Raster_RenderFunc Invoke a given raster to scan-convert a given glyph image into a target bitmap.","title":"FT_Raster_RenderFunc"},{"location":"ft2-raster.html#ft_raster_funcs","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef struct FT_Raster_Funcs_ { FT_Glyph_Format glyph_format; FT_Raster_NewFunc raster_new; FT_Raster_ResetFunc raster_reset; FT_Raster_SetModeFunc raster_set_mode; FT_Raster_RenderFunc raster_render; FT_Raster_DoneFunc raster_done; } FT_Raster_Funcs ; A structure used to describe a given raster class to the library.","title":"FT_Raster_Funcs"},{"location":"ft2-raster.html#ft_raster_bittest_func","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef int (* FT_Raster_BitTest_Func )( int y, int x, void * user ); Deprecated, unimplemented.","title":"FT_Raster_BitTest_Func"},{"location":"ft2-raster.html#ft_raster_bitset_func","text":"Defined in FT_IMAGE_H (freetype/ftimage.h). typedef void (* FT_Raster_BitSet_Func )( int y, int x, void * user ); Deprecated, unimplemented.","title":"FT_Raster_BitSet_Func"},{"location":"ft2-sfnt_names.html","text":"FreeType Docs Format-Specific API SFNT Names SFNT Names Synopsis The TrueType and OpenType specifications allow the inclusion of a special names table ( name ) in font files. This table contains textual (and internationalized) information regarding the font, like family name, copyright, version, etc. The definitions below are used to access them if available. Note that this has nothing to do with glyph names! FT_SfntName Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). typedef struct FT_SfntName_ { FT_UShort platform_id; FT_UShort encoding_id; FT_UShort language_id; FT_UShort name_id; FT_Byte * string; /* this string is *not* null-terminated! */ FT_UInt string_len; /* in bytes */ } FT_SfntName ; A structure used to model an SFNT name table entry. fields platform_id The platform ID for string . See TT_PLATFORM_XXX for possible values. encoding_id The encoding ID for string . See TT_APPLE_ID_XXX , TT_MAC_ID_XXX , TT_ISO_ID_XXX , TT_MS_ID_XXX , and TT_ADOBE_ID_XXX for possible values. language_id The language ID for string . See TT_MAC_LANGID_XXX and TT_MS_LANGID_XXX for possible values. Registered OpenType values for language_id are always smaller than 0x8000; values equal or larger than 0x8000 usually indicate a language tag string (introduced in OpenType version 1.6). Use function FT_Get_Sfnt_LangTag with language_id as its argument to retrieve the associated language tag. name_id An identifier for string . See TT_NAME_ID_XXX for possible values. string The name string. Note that its format differs depending on the (platform,encoding) pair, being either a string of bytes (without a terminating NULL byte) or containing UTF-16BE entities. string_len The length of string in bytes. note Please refer to the TrueType or OpenType specification for more details. FT_Get_Sfnt_Name_Count Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). FT_EXPORT( FT_UInt ) FT_Get_Sfnt_Name_Count ( FT_Face face ); Retrieve the number of name strings in the SFNT name table. input face A handle to the source face. return The number of strings in the name table. note This function always returns an error if the config macro TT_CONFIG_OPTION_SFNT_NAMES is not defined in ftoption.h . FT_Get_Sfnt_Name Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). FT_EXPORT( FT_Error ) FT_Get_Sfnt_Name ( FT_Face face, FT_UInt idx, FT_SfntName *aname ); Retrieve a string of the SFNT name table for a given index. input face A handle to the source face. idx The index of the name string. output aname The indexed FT_SfntName structure. return FreeType error code. 0 means success. note The string array returned in the aname structure is not null-terminated. Note that you don't have to deallocate string by yourself; FreeType takes care of it if you call FT_Done_Face . Use FT_Get_Sfnt_Name_Count to get the total number of available name table entries, then do a loop until you get the right platform, encoding, and name ID. name table format 1 entries can use language tags also, see FT_Get_Sfnt_LangTag . This function always returns an error if the config macro TT_CONFIG_OPTION_SFNT_NAMES is not defined in ftoption.h . FT_SfntLangTag Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). typedef struct FT_SfntLangTag_ { FT_Byte * string; /* this string is *not* null-terminated! */ FT_UInt string_len; /* in bytes */ } FT_SfntLangTag ; A structure to model a language tag entry from an SFNT name table. fields string The language tag string, encoded in UTF-16BE (without trailing NULL bytes). string_len The length of string in bytes . note Please refer to the TrueType or OpenType specification for more details. since 2.8 FT_Get_Sfnt_LangTag Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). FT_EXPORT( FT_Error ) FT_Get_Sfnt_LangTag ( FT_Face face, FT_UInt langID, FT_SfntLangTag *alangTag ); Retrieve the language tag associated with a language ID of an SFNT name table entry. input face A handle to the source face. langID The language ID, as returned by FT_Get_Sfnt_Name . This is always a value larger than 0x8000. output alangTag The language tag associated with the name table entry's language ID. return FreeType error code. 0 means success. note The string array returned in the alangTag structure is not null-terminated. Note that you don't have to deallocate string by yourself; FreeType takes care of it if you call FT_Done_Face . Only name table format 1 supports language tags. For format 0 tables, this function always returns FT_Err_Invalid_Table. For invalid format 1 language ID values, FT_Err_Invalid_Argument is returned. This function always returns an error if the config macro TT_CONFIG_OPTION_SFNT_NAMES is not defined in ftoption.h . since 2.8","title":"SFNT Names"},{"location":"ft2-sfnt_names.html#sfnt-names","text":"","title":"SFNT Names"},{"location":"ft2-sfnt_names.html#synopsis","text":"The TrueType and OpenType specifications allow the inclusion of a special names table ( name ) in font files. This table contains textual (and internationalized) information regarding the font, like family name, copyright, version, etc. The definitions below are used to access them if available. Note that this has nothing to do with glyph names!","title":"Synopsis"},{"location":"ft2-sfnt_names.html#ft_sfntname","text":"Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). typedef struct FT_SfntName_ { FT_UShort platform_id; FT_UShort encoding_id; FT_UShort language_id; FT_UShort name_id; FT_Byte * string; /* this string is *not* null-terminated! */ FT_UInt string_len; /* in bytes */ } FT_SfntName ; A structure used to model an SFNT name table entry.","title":"FT_SfntName"},{"location":"ft2-sfnt_names.html#ft_get_sfnt_name_count","text":"Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). FT_EXPORT( FT_UInt ) FT_Get_Sfnt_Name_Count ( FT_Face face ); Retrieve the number of name strings in the SFNT name table.","title":"FT_Get_Sfnt_Name_Count"},{"location":"ft2-sfnt_names.html#ft_get_sfnt_name","text":"Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). FT_EXPORT( FT_Error ) FT_Get_Sfnt_Name ( FT_Face face, FT_UInt idx, FT_SfntName *aname ); Retrieve a string of the SFNT name table for a given index.","title":"FT_Get_Sfnt_Name"},{"location":"ft2-sfnt_names.html#ft_sfntlangtag","text":"Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). typedef struct FT_SfntLangTag_ { FT_Byte * string; /* this string is *not* null-terminated! */ FT_UInt string_len; /* in bytes */ } FT_SfntLangTag ; A structure to model a language tag entry from an SFNT name table.","title":"FT_SfntLangTag"},{"location":"ft2-sfnt_names.html#ft_get_sfnt_langtag","text":"Defined in FT_SFNT_NAMES_H (freetype/ftsnames.h). FT_EXPORT( FT_Error ) FT_Get_Sfnt_LangTag ( FT_Face face, FT_UInt langID, FT_SfntLangTag *alangTag ); Retrieve the language tag associated with a language ID of an SFNT name table entry.","title":"FT_Get_Sfnt_LangTag"},{"location":"ft2-sizes_management.html","text":"FreeType Docs Core API Size Management Size Management Synopsis When creating a new face object (e.g., with FT_New_Face ), an FT_Size object is automatically created and used to store all pixel-size dependent information, available in the face- size field. It is however possible to create more sizes for a given face, mostly in order to manage several character pixel sizes of the same font family and style. See FT_New_Size and FT_Done_Size . Note that FT_Set_Pixel_Sizes and FT_Set_Char_Size only modify the contents of the current active size; you thus need to use FT_Activate_Size to change it. 99% of applications won't need the functions provided here, especially if they use the caching sub-system, so be cautious when using these. FT_New_Size Defined in FT_SIZES_H (freetype/ftsizes.h). FT_EXPORT( FT_Error ) FT_New_Size ( FT_Face face, FT_Size * size ); Create a new size object from a given face object. input face A handle to a parent face object. output asize A handle to a new size object. return FreeType error code. 0 means success. note You need to call FT_Activate_Size in order to select the new size for upcoming calls to FT_Set_Pixel_Sizes , FT_Set_Char_Size , FT_Load_Glyph , FT_Load_Char , etc. FT_Done_Size Defined in FT_SIZES_H (freetype/ftsizes.h). FT_EXPORT( FT_Error ) FT_Done_Size ( FT_Size size ); Discard a given size object. Note that FT_Done_Face automatically discards all size objects allocated with FT_New_Size . input size A handle to a target size object. return FreeType error code. 0 means success. FT_Activate_Size Defined in FT_SIZES_H (freetype/ftsizes.h). FT_EXPORT( FT_Error ) FT_Activate_Size ( FT_Size size ); Even though it is possible to create several size objects for a given face (see FT_New_Size for details), functions like FT_Load_Glyph or FT_Load_Char only use the one that has been activated last to determine the current character pixel size . This function can be used to activate a previously created size object. input size A handle to a target size object. return FreeType error code. 0 means success. note If face is the size's parent face object, this function changes the value of face- size to the input size handle.","title":"Size Management"},{"location":"ft2-sizes_management.html#size-management","text":"","title":"Size Management"},{"location":"ft2-sizes_management.html#synopsis","text":"When creating a new face object (e.g., with FT_New_Face ), an FT_Size object is automatically created and used to store all pixel-size dependent information, available in the face- size field. It is however possible to create more sizes for a given face, mostly in order to manage several character pixel sizes of the same font family and style. See FT_New_Size and FT_Done_Size . Note that FT_Set_Pixel_Sizes and FT_Set_Char_Size only modify the contents of the current active size; you thus need to use FT_Activate_Size to change it. 99% of applications won't need the functions provided here, especially if they use the caching sub-system, so be cautious when using these.","title":"Synopsis"},{"location":"ft2-sizes_management.html#ft_new_size","text":"Defined in FT_SIZES_H (freetype/ftsizes.h). FT_EXPORT( FT_Error ) FT_New_Size ( FT_Face face, FT_Size * size ); Create a new size object from a given face object.","title":"FT_New_Size"},{"location":"ft2-sizes_management.html#ft_done_size","text":"Defined in FT_SIZES_H (freetype/ftsizes.h). FT_EXPORT( FT_Error ) FT_Done_Size ( FT_Size size ); Discard a given size object. Note that FT_Done_Face automatically discards all size objects allocated with FT_New_Size .","title":"FT_Done_Size"},{"location":"ft2-sizes_management.html#ft_activate_size","text":"Defined in FT_SIZES_H (freetype/ftsizes.h). FT_EXPORT( FT_Error ) FT_Activate_Size ( FT_Size size ); Even though it is possible to create several size objects for a given face (see FT_New_Size for details), functions like FT_Load_Glyph or FT_Load_Char only use the one that has been activated last to determine the current character pixel size . This function can be used to activate a previously created size object.","title":"FT_Activate_Size"},{"location":"ft2-system_interface.html","text":"FreeType Docs Support API System Interface System Interface Synopsis This section contains various definitions related to memory management and i/o access. You need to understand this information if you want to use a custom memory manager or you own i/o streams. FT_Memory Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef struct FT_MemoryRec_* FT_Memory ; A handle to a given memory manager object, defined with an FT_MemoryRec structure. FT_Alloc_Func Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void * (* FT_Alloc_Func )( FT_Memory memory, long size ); A function used to allocate size bytes from memory . input memory A handle to the source memory manager. size The size in bytes to allocate. return Address of new memory block. 0 in case of failure. FT_Free_Func Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void (* FT_Free_Func )( FT_Memory memory, void * block ); A function used to release a given block of memory. input memory A handle to the source memory manager. block The address of the target memory block. FT_Realloc_Func Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void * (* FT_Realloc_Func )( FT_Memory memory, long cur_size, long new_size, void * block ); A function used to re-allocate a given block of memory. input memory A handle to the source memory manager. cur_size The block's current size in bytes. new_size The block's requested new size. block The block's current address. return New block address. 0 in case of memory shortage. note In case of error, the old block must still be available. FT_MemoryRec Defined in FT_SYSTEM_H (freetype/ftsystem.h). struct FT_MemoryRec_ { void * user; FT_Alloc_Func alloc; FT_Free_Func free; FT_Realloc_Func realloc; }; A structure used to describe a given memory manager to FreeType 2. fields user A generic typeless pointer for user data. alloc A pointer type to an allocation function. free A pointer type to an memory freeing function. realloc A pointer type to a reallocation function. FT_Stream Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef struct FT_StreamRec_* FT_Stream ; A handle to an input stream. also See FT_StreamRec for the publicly accessible fields of a given stream object. FT_StreamDesc Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef union FT_StreamDesc_ { long value; void * pointer; } FT_StreamDesc ; A union type used to store either a long or a pointer. This is used to store a file descriptor or a FILE* in an input stream. FT_Stream_IoFunc Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef unsigned long (* FT_Stream_IoFunc )( FT_Stream stream, unsigned long offset, unsigned char * buffer, unsigned long count ); A function used to seek and read data from a given input stream. input stream A handle to the source stream. offset The offset of read in stream (always from start). buffer The address of the read buffer. count The number of bytes to read from the stream. return The number of bytes effectively read by the stream. note This function might be called to perform a seek or skip operation with a count of 0. A non-zero return value then indicates an error. FT_Stream_CloseFunc Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void (* FT_Stream_CloseFunc )( FT_Stream stream ); A function used to close a given input stream. input stream A handle to the target stream. FT_StreamRec Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef struct FT_StreamRec_ { unsigned char * base; unsigned long size; unsigned long pos; FT_StreamDesc descriptor; FT_StreamDesc pathname; FT_Stream_IoFunc read; FT_Stream_CloseFunc close; FT_Memory memory; unsigned char * cursor; unsigned char * limit; } FT_StreamRec ; A structure used to describe an input stream. input base For memory-based streams, this is the address of the first stream byte in memory. This field should always be set to NULL for disk-based streams. size The stream size in bytes. In case of compressed streams where the size is unknown before actually doing the decompression, the value is set to 0x7FFFFFFF. (Note that this size value can occur for normal streams also; it is thus just a hint.) pos The current position within the stream. descriptor This field is a union that can hold an integer or a pointer. It is used by stream implementations to store file descriptors or FILE* pointers. pathname This field is completely ignored by FreeType. However, it is often useful during debugging to use it to store the stream's filename (where available). read The stream's input function. close The stream's close function. memory The memory manager to use to preload frames. This is set internally by FreeType and shouldn't be touched by stream implementations. cursor This field is set and used internally by FreeType when parsing frames. In particular, the FT_GET_XXX macros use this instead of the pos field. limit This field is set and used internally by FreeType when parsing frames.","title":"System Interface"},{"location":"ft2-system_interface.html#system-interface","text":"","title":"System Interface"},{"location":"ft2-system_interface.html#synopsis","text":"This section contains various definitions related to memory management and i/o access. You need to understand this information if you want to use a custom memory manager or you own i/o streams.","title":"Synopsis"},{"location":"ft2-system_interface.html#ft_memory","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef struct FT_MemoryRec_* FT_Memory ; A handle to a given memory manager object, defined with an FT_MemoryRec structure.","title":"FT_Memory"},{"location":"ft2-system_interface.html#ft_alloc_func","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void * (* FT_Alloc_Func )( FT_Memory memory, long size ); A function used to allocate size bytes from memory .","title":"FT_Alloc_Func"},{"location":"ft2-system_interface.html#ft_free_func","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void (* FT_Free_Func )( FT_Memory memory, void * block ); A function used to release a given block of memory.","title":"FT_Free_Func"},{"location":"ft2-system_interface.html#ft_realloc_func","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void * (* FT_Realloc_Func )( FT_Memory memory, long cur_size, long new_size, void * block ); A function used to re-allocate a given block of memory.","title":"FT_Realloc_Func"},{"location":"ft2-system_interface.html#ft_memoryrec","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). struct FT_MemoryRec_ { void * user; FT_Alloc_Func alloc; FT_Free_Func free; FT_Realloc_Func realloc; }; A structure used to describe a given memory manager to FreeType 2.","title":"FT_MemoryRec"},{"location":"ft2-system_interface.html#ft_stream","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef struct FT_StreamRec_* FT_Stream ; A handle to an input stream.","title":"FT_Stream"},{"location":"ft2-system_interface.html#ft_streamdesc","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef union FT_StreamDesc_ { long value; void * pointer; } FT_StreamDesc ; A union type used to store either a long or a pointer. This is used to store a file descriptor or a FILE* in an input stream.","title":"FT_StreamDesc"},{"location":"ft2-system_interface.html#ft_stream_iofunc","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef unsigned long (* FT_Stream_IoFunc )( FT_Stream stream, unsigned long offset, unsigned char * buffer, unsigned long count ); A function used to seek and read data from a given input stream.","title":"FT_Stream_IoFunc"},{"location":"ft2-system_interface.html#ft_stream_closefunc","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef void (* FT_Stream_CloseFunc )( FT_Stream stream ); A function used to close a given input stream.","title":"FT_Stream_CloseFunc"},{"location":"ft2-system_interface.html#ft_streamrec","text":"Defined in FT_SYSTEM_H (freetype/ftsystem.h). typedef struct FT_StreamRec_ { unsigned char * base; unsigned long size; unsigned long pos; FT_StreamDesc descriptor; FT_StreamDesc pathname; FT_Stream_IoFunc read; FT_Stream_CloseFunc close; FT_Memory memory; unsigned char * cursor; unsigned char * limit; } FT_StreamRec ; A structure used to describe an input stream.","title":"FT_StreamRec"},{"location":"ft2-t1_cid_driver.html","text":"FreeType Docs Controlling FreeType Modules The Type 1 and CID drivers The Type 1 and CID drivers Synopsis It is possible to control the behaviour of FreeType's Type 1 and Type 1 CID drivers with FT_Property_Set and FT_Property_Get . Behind the scenes, both drivers use the Adobe CFF engine for hinting; however, the used properties must be specified separately. The Type 1 driver's module name is type1 ; the CID driver's module name is t1cid . Available properties are hinting-engine , no-stem-darkening , darkening-parameters , and random-seed , as documented in the Driver properties section. Please see the The CFF driver section for more details on the new hinting engine.","title":"The Type 1 and CID drivers"},{"location":"ft2-t1_cid_driver.html#the-type-1-and-cid-drivers","text":"","title":"The Type 1 and CID drivers"},{"location":"ft2-t1_cid_driver.html#synopsis","text":"It is possible to control the behaviour of FreeType's Type 1 and Type 1 CID drivers with FT_Property_Set and FT_Property_Get . Behind the scenes, both drivers use the Adobe CFF engine for hinting; however, the used properties must be specified separately. The Type 1 driver's module name is type1 ; the CID driver's module name is t1cid . Available properties are hinting-engine , no-stem-darkening , darkening-parameters , and random-seed , as documented in the Driver properties section. Please see the The CFF driver section for more details on the new hinting engine.","title":"Synopsis"},{"location":"ft2-truetype_engine.html","text":"FreeType Docs Miscellaneous The TrueType Engine The TrueType Engine Synopsis This section contains a function used to query the level of TrueType bytecode support compiled in this version of the library. FT_TrueTypeEngineType Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef enum FT_TrueTypeEngineType_ { FT_TRUETYPE_ENGINE_TYPE_NONE = 0, FT_TRUETYPE_ENGINE_TYPE_UNPATENTED , FT_TRUETYPE_ENGINE_TYPE_PATENTED } FT_TrueTypeEngineType ; A list of values describing which kind of TrueType bytecode engine is implemented in a given FT_Library instance. It is used by the FT_Get_TrueType_Engine_Type function. values FT_TRUETYPE_ENGINE_TYPE_NONE The library doesn't implement any kind of bytecode interpreter. FT_TRUETYPE_ENGINE_TYPE_UNPATENTED Deprecated and removed. FT_TRUETYPE_ENGINE_TYPE_PATENTED The library implements a bytecode interpreter that covers the full instruction set of the TrueType virtual machine (this was governed by patents until May 2010, hence the name). since 2.2 FT_Get_TrueType_Engine_Type Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_TrueTypeEngineType ) FT_Get_TrueType_Engine_Type ( FT_Library library ); Return an FT_TrueTypeEngineType value to indicate which level of the TrueType virtual machine a given library instance supports. input library A library instance. return A value indicating which level is supported. since 2.2","title":"The TrueType Engine"},{"location":"ft2-truetype_engine.html#the-truetype-engine","text":"","title":"The TrueType Engine"},{"location":"ft2-truetype_engine.html#synopsis","text":"This section contains a function used to query the level of TrueType bytecode support compiled in this version of the library.","title":"Synopsis"},{"location":"ft2-truetype_engine.html#ft_truetypeenginetype","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). typedef enum FT_TrueTypeEngineType_ { FT_TRUETYPE_ENGINE_TYPE_NONE = 0, FT_TRUETYPE_ENGINE_TYPE_UNPATENTED , FT_TRUETYPE_ENGINE_TYPE_PATENTED } FT_TrueTypeEngineType ; A list of values describing which kind of TrueType bytecode engine is implemented in a given FT_Library instance. It is used by the FT_Get_TrueType_Engine_Type function.","title":"FT_TrueTypeEngineType"},{"location":"ft2-truetype_engine.html#ft_get_truetype_engine_type","text":"Defined in FT_MODULE_H (freetype/ftmodapi.h). FT_EXPORT( FT_TrueTypeEngineType ) FT_Get_TrueType_Engine_Type ( FT_Library library ); Return an FT_TrueTypeEngineType value to indicate which level of the TrueType virtual machine a given library instance supports.","title":"FT_Get_TrueType_Engine_Type"},{"location":"ft2-truetype_tables.html","text":"FreeType Docs Format-Specific API TrueType Tables TrueType Tables Synopsis This section contains definitions of some basic tables specific to TrueType and OpenType as well as some routines used to access and process them. TT_Header Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_Header_ { FT_Fixed Table_Version; FT_Fixed Font_Revision; FT_Long CheckSum_Adjust; FT_Long Magic_Number; FT_UShort Flags; FT_UShort Units_Per_EM; FT_ULong Created [2]; FT_ULong Modified[2]; FT_Short xMin; FT_Short yMin; FT_Short xMax; FT_Short yMax; FT_UShort Mac_Style; FT_UShort Lowest_Rec_PPEM; FT_Short Font_Direction; FT_Short Index_To_Loc_Format; FT_Short Glyph_Data_Format; } TT_Header ; A structure to model a TrueType font header table. All fields follow the OpenType specification. The 64-bit timestamps are stored in two-element arrays Created and Modified , first the upper then the lower 32 bits. TT_HoriHeader Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_HoriHeader_ { FT_Fixed Version; FT_Short Ascender; FT_Short Descender; FT_Short Line_Gap; FT_UShort advance_Width_Max; /* advance width maximum */ FT_Short min_Left_Side_Bearing; /* minimum left-sb */ FT_Short min_Right_Side_Bearing; /* minimum right-sb */ FT_Short xMax_Extent; /* xmax extents */ FT_Short caret_Slope_Rise; FT_Short caret_Slope_Run; FT_Short caret_Offset; FT_Short Reserved[4]; FT_Short metric_Data_Format; FT_UShort number_Of_HMetrics; /* The following fields are not defined by the OpenType specification */ /* but they are used to connect the metrics header to the relevant */ /* 'hmtx' table. */ void * long_metrics; void * short_metrics; } TT_HoriHeader ; A structure to model a TrueType horizontal header, the hhea table, as well as the corresponding horizontal metrics table, hmtx . fields Version The table version. Ascender The font's ascender, i.e., the distance from the baseline to the top-most of all glyph points found in the font. This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII). You should use the sTypoAscender field of the OS/2 table instead if you want the correct one. Descender The font's descender, i.e., the distance from the baseline to the bottom-most of all glyph points found in the font. It is negative. This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII). You should use the sTypoDescender field of the OS/2 table instead if you want the correct one. Line_Gap The font's line gap, i.e., the distance to add to the ascender and descender to get the BTB, i.e., the baseline-to-baseline distance for the font. advance_Width_Max This field is the maximum of all advance widths found in the font. It can be used to compute the maximum width of an arbitrary string of text. min_Left_Side_Bearing The minimum left side bearing of all glyphs within the font. min_Right_Side_Bearing The minimum right side bearing of all glyphs within the font. xMax_Extent The maximum horizontal extent (i.e., the width of a glyph's bounding box) for all glyphs in the font. caret_Slope_Rise The rise coefficient of the cursor's slope of the cursor (slope=rise/run). caret_Slope_Run The run coefficient of the cursor's slope. caret_Offset The cursor's offset for slanted fonts. Reserved 8 reserved bytes. metric_Data_Format Always 0. number_Of_HMetrics Number of HMetrics entries in the hmtx table -- this value can be smaller than the total number of glyphs in the font. long_metrics A pointer into the hmtx table. short_metrics A pointer into the hmtx table. note For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an MVAR table: caret_Slope_Rise , caret_Slope_Run , and caret_Offset . TT_VertHeader Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_VertHeader_ { FT_Fixed Version; FT_Short Ascender; FT_Short Descender; FT_Short Line_Gap; FT_UShort advance_Height_Max; /* advance height maximum */ FT_Short min_Top_Side_Bearing; /* minimum top-sb */ FT_Short min_Bottom_Side_Bearing; /* minimum bottom-sb */ FT_Short yMax_Extent; /* ymax extents */ FT_Short caret_Slope_Rise; FT_Short caret_Slope_Run; FT_Short caret_Offset; FT_Short Reserved[4]; FT_Short metric_Data_Format; FT_UShort number_Of_VMetrics; /* The following fields are not defined by the OpenType specification */ /* but they are used to connect the metrics header to the relevant */ /* 'vmtx' table. */ void * long_metrics; void * short_metrics; } TT_VertHeader ; A structure used to model a TrueType vertical header, the vhea table, as well as the corresponding vertical metrics table, vmtx . fields Version The table version. Ascender The font's ascender, i.e., the distance from the baseline to the top-most of all glyph points found in the font. This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII). You should use the sTypoAscender field of the OS/2 table instead if you want the correct one. Descender The font's descender, i.e., the distance from the baseline to the bottom-most of all glyph points found in the font. It is negative. This value is invalid in many fonts, as it is usually set by the font designer, and often reflects only a portion of the glyphs found in the font (maybe ASCII). You should use the sTypoDescender field of the OS/2 table instead if you want the correct one. Line_Gap The font's line gap, i.e., the distance to add to the ascender and descender to get the BTB, i.e., the baseline-to-baseline distance for the font. advance_Height_Max This field is the maximum of all advance heights found in the font. It can be used to compute the maximum height of an arbitrary string of text. min_Top_Side_Bearing The minimum top side bearing of all glyphs within the font. min_Bottom_Side_Bearing The minimum bottom side bearing of all glyphs within the font. yMax_Extent The maximum vertical extent (i.e., the height of a glyph's bounding box) for all glyphs in the font. caret_Slope_Rise The rise coefficient of the cursor's slope of the cursor (slope=rise/run). caret_Slope_Run The run coefficient of the cursor's slope. caret_Offset The cursor's offset for slanted fonts. Reserved 8 reserved bytes. metric_Data_Format Always 0. number_Of_VMetrics Number of VMetrics entries in the vmtx table -- this value can be smaller than the total number of glyphs in the font. long_metrics A pointer into the vmtx table. short_metrics A pointer into the vmtx table. note For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an MVAR table: Ascender , Descender , Line_Gap , caret_Slope_Rise , caret_Slope_Run , and caret_Offset . TT_OS2 Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_OS2_ { FT_UShort version; /* 0x0001 - more or 0xFFFF */ FT_Short xAvgCharWidth; FT_UShort usWeightClass; FT_UShort usWidthClass; FT_UShort fsType; FT_Short ySubscriptXSize; FT_Short ySubscriptYSize; FT_Short ySubscriptXOffset; FT_Short ySubscriptYOffset; FT_Short ySuperscriptXSize; FT_Short ySuperscriptYSize; FT_Short ySuperscriptXOffset; FT_Short ySuperscriptYOffset; FT_Short yStrikeoutSize; FT_Short yStrikeoutPosition; FT_Short sFamilyClass; FT_Byte panose[10]; FT_ULong ulUnicodeRange1; /* Bits 0-31 */ FT_ULong ulUnicodeRange2; /* Bits 32-63 */ FT_ULong ulUnicodeRange3; /* Bits 64-95 */ FT_ULong ulUnicodeRange4; /* Bits 96-127 */ FT_Char achVendID[4]; FT_UShort fsSelection; FT_UShort usFirstCharIndex; FT_UShort usLastCharIndex; FT_Short sTypoAscender; FT_Short sTypoDescender; FT_Short sTypoLineGap; FT_UShort usWinAscent; FT_UShort usWinDescent; /* only version 1 and higher: */ FT_ULong ulCodePageRange1; /* Bits 0-31 */ FT_ULong ulCodePageRange2; /* Bits 32-63 */ /* only version 2 and higher: */ FT_Short sxHeight; FT_Short sCapHeight; FT_UShort usDefaultChar; FT_UShort usBreakChar; FT_UShort usMaxContext; /* only version 5 and higher: */ FT_UShort usLowerOpticalPointSize; /* in twips (1/20th points) */ FT_UShort usUpperOpticalPointSize; /* in twips (1/20th points) */ } TT_OS2 ; A structure to model a TrueType OS/2 table. All fields comply to the OpenType specification. Note that we now support old Mac fonts that do not include an OS/2 table. In this case, the version field is always set to 0xFFFF. note For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an MVAR table: sCapHeight , sTypoAscender , sTypoDescender , sTypoLineGap , sxHeight , usWinAscent , usWinDescent , yStrikeoutPosition , yStrikeoutSize , ySubscriptXOffset , ySubScriptXSize , ySubscriptYOffset , ySubscriptYSize , ySuperscriptXOffset , ySuperscriptXSize , ySuperscriptYOffset , and ySuperscriptYSize . Possible values for bits in the ulUnicodeRangeX fields are given by the TT_UCR_XXX macros. TT_Postscript Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_Postscript_ { FT_Fixed FormatType; FT_Fixed italicAngle; FT_Short underlinePosition; FT_Short underlineThickness; FT_ULong isFixedPitch; FT_ULong minMemType42; FT_ULong maxMemType42; FT_ULong minMemType1; FT_ULong maxMemType1; /* Glyph names follow in the 'post' table, but we don't */ /* load them by default. */ } TT_Postscript ; A structure to model a TrueType post table. All fields comply to the OpenType specification. This structure does not reference a font's PostScript glyph names; use FT_Get_Glyph_Name to retrieve them. note For an OpenType variation font, the values of the following fields can change after a call to FT_Set_Var_Design_Coordinates (and friends) if the font contains an MVAR table: underlinePosition and underlineThickness . TT_PCLT Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_PCLT_ { FT_Fixed Version; FT_ULong FontNumber; FT_UShort Pitch; FT_UShort xHeight; FT_UShort Style; FT_UShort TypeFamily; FT_UShort CapHeight; FT_UShort SymbolSet; FT_Char TypeFace[16]; FT_Char CharacterComplement[8]; FT_Char FileName[6]; FT_Char StrokeWeight; FT_Char WidthType; FT_Byte SerifStyle; FT_Byte Reserved; } TT_PCLT ; A structure to model a TrueType PCLT table. All fields comply to the OpenType specification. TT_MaxProfile Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_MaxProfile_ { FT_Fixed version; FT_UShort numGlyphs; FT_UShort maxPoints; FT_UShort maxContours; FT_UShort maxCompositePoints; FT_UShort maxCompositeContours; FT_UShort maxZones; FT_UShort maxTwilightPoints; FT_UShort maxStorage; FT_UShort maxFunctionDefs; FT_UShort maxInstructionDefs; FT_UShort maxStackElements; FT_UShort maxSizeOfInstructions; FT_UShort maxComponentElements; FT_UShort maxComponentDepth; } TT_MaxProfile ; The maximum profile ( maxp ) table contains many max values, which can be used to pre-allocate arrays for speeding up glyph loading and hinting. fields version The version number. numGlyphs The number of glyphs in this TrueType font. maxPoints The maximum number of points in a non-composite TrueType glyph. See also maxCompositePoints . maxContours The maximum number of contours in a non-composite TrueType glyph. See also maxCompositeContours . maxCompositePoints The maximum number of points in a composite TrueType glyph. See also maxPoints . maxCompositeContours The maximum number of contours in a composite TrueType glyph. See also maxContours . maxZones The maximum number of zones used for glyph hinting. maxTwilightPoints The maximum number of points in the twilight zone used for glyph hinting. maxStorage The maximum number of elements in the storage area used for glyph hinting. maxFunctionDefs The maximum number of function definitions in the TrueType bytecode for this font. maxInstructionDefs The maximum number of instruction definitions in the TrueType bytecode for this font. maxStackElements The maximum number of stack elements used during bytecode interpretation. maxSizeOfInstructions The maximum number of TrueType opcodes used for glyph hinting. maxComponentElements The maximum number of simple (i.e., non-composite) glyphs in a composite glyph. maxComponentDepth The maximum nesting depth of composite glyphs. note This structure is only used during font loading. FT_Sfnt_Tag Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef enum FT_Sfnt_Tag_ { FT_SFNT_HEAD , FT_SFNT_MAXP , FT_SFNT_OS2 , FT_SFNT_HHEA , FT_SFNT_VHEA , FT_SFNT_POST , FT_SFNT_PCLT , FT_SFNT_MAX } FT_Sfnt_Tag ; /* these constants are deprecated; use the corresponding ` FT_Sfnt_Tag ` */ /* values instead */ # define ft_sfnt_head FT_SFNT_HEAD # define ft_sfnt_maxp FT_SFNT_MAXP # define ft_sfnt_os2 FT_SFNT_OS2 # define ft_sfnt_hhea FT_SFNT_HHEA # define ft_sfnt_vhea FT_SFNT_VHEA # define ft_sfnt_post FT_SFNT_POST # define ft_sfnt_pclt FT_SFNT_PCLT An enumeration to specify indices of SFNT tables loaded and parsed by FreeType during initialization of an SFNT font. Used in the FT_Get_Sfnt_Table API function. values FT_SFNT_HEAD To access the font's TT_Header structure. FT_SFNT_MAXP To access the font's TT_MaxProfile structure. FT_SFNT_OS2 To access the font's TT_OS2 structure. FT_SFNT_HHEA To access the font's TT_HoriHeader structure. FT_SFNT_VHEA To access the font's TT_VertHeader structure. FT_SFNT_POST To access the font's TT_Postscript structure. FT_SFNT_PCLT To access the font's TT_PCLT structure. FT_Get_Sfnt_Table Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( void * ) FT_Get_Sfnt_Table ( FT_Face face, FT_Sfnt_Tag tag ); Return a pointer to a given SFNT table stored within a face. input face A handle to the source. tag The index of the SFNT table. return A type-less pointer to the table. This will be NULL in case of error, or if the corresponding table was not found OR loaded from the file. Use a typecast according to tag to access the structure elements. note The table is owned by the face object and disappears with it. This function is only useful to access SFNT tables that are loaded by the sfnt, truetype, and opentype drivers. See FT_Sfnt_Tag for a list. example Here is an example demonstrating access to the vhea table. TT_VertHeader* vert_header; vert_header = (TT_VertHeader*)FT_Get_Sfnt_Table( face, FT_SFNT_VHEA ); FT_Load_Sfnt_Table Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_Error ) FT_Load_Sfnt_Table ( FT_Face face, FT_ULong tag, FT_Long offset, FT_Byte * buffer, FT_ULong * length ); Load any SFNT font table into client memory. input face A handle to the source face. tag The four-byte tag of the table to load. Use value 0 if you want to access the whole font file. Otherwise, you can use one of the definitions found in the FT_TRUETYPE_TAGS_H file, or forge a new one with FT_MAKE_TAG . offset The starting offset in the table (or file if tag == 0). output buffer The target buffer address. The client must ensure that the memory array is big enough to hold the data. inout length If the length parameter is NULL , try to load the whole table. Return an error code if it fails. Else, if *length is 0, exit immediately while returning the table's (or file) full size in it. Else the number of bytes to read from the table or file, from the starting offset. return FreeType error code. 0 means success. note If you need to determine the table's length you should first call this function with *length set to 0, as in the following example: FT_ULong length = 0; error = FT_Load_Sfnt_Table( face, tag, 0, NULL, length ); if ( error ) { ... table does not exist ... } buffer = malloc( length ); if ( buffer == NULL ) { ... not enough memory ... } error = FT_Load_Sfnt_Table( face, tag, 0, buffer, length ); if ( error ) { ... could not load table ... } Note that structures like TT_Header or TT_OS2 can't be used with this function; they are limited to FT_Get_Sfnt_Table . Reason is that those structures depend on the processor architecture, with varying size (e.g. 32bit vs. 64bit) or order (big endian vs. little endian). FT_Sfnt_Table_Info Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_Error ) FT_Sfnt_Table_Info ( FT_Face face, FT_UInt table_index, FT_ULong *tag, FT_ULong *length ); Return information on an SFNT table. input face A handle to the source face. table_index The index of an SFNT table. The function returns FT_Err_Table_Missing for an invalid value. inout tag The name tag of the SFNT table. If the value is NULL , table_index is ignored, and length returns the number of SFNT tables in the font. output length The length of the SFNT table (or the number of SFNT tables, depending on tag ). return FreeType error code. 0 means success. note While parsing fonts, FreeType handles SFNT tables with length zero as missing. FT_Get_CMap_Language_ID Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_ULong ) FT_Get_CMap_Language_ID ( FT_CharMap charmap ); Return cmap language ID as specified in the OpenType standard. Definitions of language ID values are in file FT_TRUETYPE_IDS_H . input charmap The target charmap. return The language ID of charmap . If charmap doesn't belong to an SFNT face, just return 0 as the default value. For a format 14 cmap (to access Unicode IVS), the return value is 0xFFFFFFFF. FT_Get_CMap_Format Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_Long ) FT_Get_CMap_Format ( FT_CharMap charmap ); Return the format of an SFNT cmap table. input charmap The target charmap. return The format of charmap . If charmap doesn't belong to an SFNT face, return -1. FT_PARAM_TAG_UNPATENTED_HINTING # define FT_PARAM_TAG_UNPATENTED_HINTING \\ FT_MAKE_TAG ( 'u', 'n', 'p', 'a' ) Deprecated, no effect. Previously: A constant used as the tag of an FT_Parameter structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by FT_Open_Face . TT_PLATFORM_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_PLATFORM_APPLE_UNICODE 0 # define TT_PLATFORM_MACINTOSH 1 # define TT_PLATFORM_ISO 2 /* deprecated */ # define TT_PLATFORM_MICROSOFT 3 # define TT_PLATFORM_CUSTOM 4 # define TT_PLATFORM_ADOBE 7 /* artificial */ A list of valid values for the platform_id identifier code in FT_CharMapRec and FT_SfntName structures. values TT_PLATFORM_APPLE_UNICODE Used by Apple to indicate a Unicode character map and/or name entry. See TT_APPLE_ID_XXX for corresponding encoding_id values. Note that name entries in this format are coded as big-endian UCS-2 character codes only . TT_PLATFORM_MACINTOSH Used by Apple to indicate a MacOS-specific charmap and/or name entry. See TT_MAC_ID_XXX for corresponding encoding_id values. Note that most TrueType fonts contain an Apple roman charmap to be usable on MacOS systems (even if they contain a Microsoft charmap as well). TT_PLATFORM_ISO This value was used to specify ISO/IEC 10646 charmaps. It is however now deprecated. See TT_ISO_ID_XXX for a list of corresponding encoding_id values. TT_PLATFORM_MICROSOFT Used by Microsoft to indicate Windows-specific charmaps. See TT_MS_ID_XXX for a list of corresponding encoding_id values. Note that most fonts contain a Unicode charmap using ( TT_PLATFORM_MICROSOFT , TT_MS_ID_UNICODE_CS ). TT_PLATFORM_CUSTOM Used to indicate application-specific charmaps. TT_PLATFORM_ADOBE This value isn't part of any font format specification, but is used by FreeType to report Adobe-specific charmaps in an FT_CharMapRec structure. See TT_ADOBE_ID_XXX . TT_APPLE_ID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_APPLE_ID_DEFAULT 0 /* Unicode 1.0 */ # define TT_APPLE_ID_UNICODE_1_1 1 /* specify Hangul at U+34xx */ # define TT_APPLE_ID_ISO_10646 2 /* deprecated */ # define TT_APPLE_ID_UNICODE_2_0 3 /* or later */ # define TT_APPLE_ID_UNICODE_32 4 /* 2.0 or later, full repertoire */ # define TT_APPLE_ID_VARIANT_SELECTOR 5 /* variation selector data */ # define TT_APPLE_ID_FULL_UNICODE 6 /* used with type 13 cmaps */ A list of valid values for the encoding_id for TT_PLATFORM_APPLE_UNICODE charmaps and name entries. values TT_APPLE_ID_DEFAULT Unicode version 1.0. TT_APPLE_ID_UNICODE_1_1 Unicode 1.1; specifies Hangul characters starting at U+34xx. TT_APPLE_ID_ISO_10646 Deprecated (identical to preceding). TT_APPLE_ID_UNICODE_2_0 Unicode 2.0 and beyond (UTF-16 BMP only). TT_APPLE_ID_UNICODE_32 Unicode 3.1 and beyond, using UTF-32. TT_APPLE_ID_VARIANT_SELECTOR From Adobe, not Apple. Not a normal cmap. Specifies variations on a real cmap. TT_APPLE_ID_FULL_UNICODE Used for fallback fonts that provide complete Unicode coverage with a type 13 cmap. TT_MAC_ID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MAC_ID_ROMAN 0 # define TT_MAC_ID_JAPANESE 1 # define TT_MAC_ID_TRADITIONAL_CHINESE 2 # define TT_MAC_ID_KOREAN 3 # define TT_MAC_ID_ARABIC 4 # define TT_MAC_ID_HEBREW 5 # define TT_MAC_ID_GREEK 6 # define TT_MAC_ID_RUSSIAN 7 # define TT_MAC_ID_RSYMBOL 8 # define TT_MAC_ID_DEVANAGARI 9 # define TT_MAC_ID_GURMUKHI 10 # define TT_MAC_ID_GUJARATI 11 # define TT_MAC_ID_ORIYA 12 # define TT_MAC_ID_BENGALI 13 # define TT_MAC_ID_TAMIL 14 # define TT_MAC_ID_TELUGU 15 # define TT_MAC_ID_KANNADA 16 # define TT_MAC_ID_MALAYALAM 17 # define TT_MAC_ID_SINHALESE 18 # define TT_MAC_ID_BURMESE 19 # define TT_MAC_ID_KHMER 20 # define TT_MAC_ID_THAI 21 # define TT_MAC_ID_LAOTIAN 22 # define TT_MAC_ID_GEORGIAN 23 # define TT_MAC_ID_ARMENIAN 24 # define TT_MAC_ID_MALDIVIAN 25 # define TT_MAC_ID_SIMPLIFIED_CHINESE 25 # define TT_MAC_ID_TIBETAN 26 # define TT_MAC_ID_MONGOLIAN 27 # define TT_MAC_ID_GEEZ 28 # define TT_MAC_ID_SLAVIC 29 # define TT_MAC_ID_VIETNAMESE 30 # define TT_MAC_ID_SINDHI 31 # define TT_MAC_ID_UNINTERP 32 A list of valid values for the encoding_id for TT_PLATFORM_MACINTOSH charmaps and name entries. TT_ISO_ID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_ISO_ID_7BIT_ASCII 0 # define TT_ISO_ID_10646 1 # define TT_ISO_ID_8859_1 2 A list of valid values for the encoding_id for TT_PLATFORM_ISO charmaps and name entries. Their use is now deprecated. values TT_ISO_ID_7BIT_ASCII ASCII. TT_ISO_ID_10646 ISO/10646. TT_ISO_ID_8859_1 Also known as Latin-1. TT_MS_ID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MS_ID_SYMBOL_CS 0 # define TT_MS_ID_UNICODE_CS 1 # define TT_MS_ID_SJIS 2 # define TT_MS_ID_PRC 3 # define TT_MS_ID_BIG_5 4 # define TT_MS_ID_WANSUNG 5 # define TT_MS_ID_JOHAB 6 # define TT_MS_ID_UCS_4 10 /* this value is deprecated */ # define TT_MS_ID_GB2312 TT_MS_ID_PRC A list of valid values for the encoding_id for TT_PLATFORM_MICROSOFT charmaps and name entries. values TT_MS_ID_SYMBOL_CS Microsoft symbol encoding. See FT_ENCODING_MS_SYMBOL . TT_MS_ID_UNICODE_CS Microsoft WGL4 charmap, matching Unicode. See FT_ENCODING_UNICODE . TT_MS_ID_SJIS Shift JIS Japanese encoding. See FT_ENCODING_SJIS . TT_MS_ID_PRC Chinese encodings as used in the People's Republic of China (PRC). This means the encodings GB 2312 and its supersets GBK and GB 18030. See FT_ENCODING_PRC . TT_MS_ID_BIG_5 Traditional Chinese as used in Taiwan and Hong Kong. See FT_ENCODING_BIG5 . TT_MS_ID_WANSUNG Korean Extended Wansung encoding. See FT_ENCODING_WANSUNG . TT_MS_ID_JOHAB Korean Johab encoding. See FT_ENCODING_JOHAB . TT_MS_ID_UCS_4 UCS-4 or UTF-32 charmaps. This has been added to the OpenType specification version 1.4 (mid-2001). TT_ADOBE_ID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_ADOBE_ID_STANDARD 0 # define TT_ADOBE_ID_EXPERT 1 # define TT_ADOBE_ID_CUSTOM 2 # define TT_ADOBE_ID_LATIN_1 3 A list of valid values for the encoding_id for TT_PLATFORM_ADOBE charmaps. This is a FreeType-specific extension! values TT_ADOBE_ID_STANDARD Adobe standard encoding. TT_ADOBE_ID_EXPERT Adobe expert encoding. TT_ADOBE_ID_CUSTOM Adobe custom encoding. TT_ADOBE_ID_LATIN_1 Adobe Latin 1 encoding. TT_MAC_LANGID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MAC_LANGID_ENGLISH 0 # define TT_MAC_LANGID_FRENCH 1 # define TT_MAC_LANGID_GERMAN 2 # define TT_MAC_LANGID_ITALIAN 3 # define TT_MAC_LANGID_DUTCH 4 # define TT_MAC_LANGID_SWEDISH 5 # define TT_MAC_LANGID_SPANISH 6 # define TT_MAC_LANGID_DANISH 7 # define TT_MAC_LANGID_PORTUGUESE 8 # define TT_MAC_LANGID_NORWEGIAN 9 # define TT_MAC_LANGID_HEBREW 10 # define TT_MAC_LANGID_JAPANESE 11 # define TT_MAC_LANGID_ARABIC 12 # define TT_MAC_LANGID_FINNISH 13 # define TT_MAC_LANGID_GREEK 14 # define TT_MAC_LANGID_ICELANDIC 15 # define TT_MAC_LANGID_MALTESE 16 # define TT_MAC_LANGID_TURKISH 17 # define TT_MAC_LANGID_CROATIAN 18 # define TT_MAC_LANGID_CHINESE_TRADITIONAL 19 # define TT_MAC_LANGID_URDU 20 # define TT_MAC_LANGID_HINDI 21 # define TT_MAC_LANGID_THAI 22 # define TT_MAC_LANGID_KOREAN 23 # define TT_MAC_LANGID_LITHUANIAN 24 # define TT_MAC_LANGID_POLISH 25 # define TT_MAC_LANGID_HUNGARIAN 26 # define TT_MAC_LANGID_ESTONIAN 27 # define TT_MAC_LANGID_LETTISH 28 # define TT_MAC_LANGID_SAAMISK 29 # define TT_MAC_LANGID_FAEROESE 30 # define TT_MAC_LANGID_FARSI 31 # define TT_MAC_LANGID_RUSSIAN 32 # define TT_MAC_LANGID_CHINESE_SIMPLIFIED 33 # define TT_MAC_LANGID_FLEMISH 34 # define TT_MAC_LANGID_IRISH 35 # define TT_MAC_LANGID_ALBANIAN 36 # define TT_MAC_LANGID_ROMANIAN 37 # define TT_MAC_LANGID_CZECH 38 # define TT_MAC_LANGID_SLOVAK 39 # define TT_MAC_LANGID_SLOVENIAN 40 # define TT_MAC_LANGID_YIDDISH 41 # define TT_MAC_LANGID_SERBIAN 42 # define TT_MAC_LANGID_MACEDONIAN 43 # define TT_MAC_LANGID_BULGARIAN 44 # define TT_MAC_LANGID_UKRAINIAN 45 # define TT_MAC_LANGID_BYELORUSSIAN 46 # define TT_MAC_LANGID_UZBEK 47 # define TT_MAC_LANGID_KAZAKH 48 # define TT_MAC_LANGID_AZERBAIJANI 49 # define TT_MAC_LANGID_AZERBAIJANI_CYRILLIC_SCRIPT 49 # define TT_MAC_LANGID_AZERBAIJANI_ARABIC_SCRIPT 50 # define TT_MAC_LANGID_ARMENIAN 51 # define TT_MAC_LANGID_GEORGIAN 52 # define TT_MAC_LANGID_MOLDAVIAN 53 # define TT_MAC_LANGID_KIRGHIZ 54 # define TT_MAC_LANGID_TAJIKI 55 # define TT_MAC_LANGID_TURKMEN 56 # define TT_MAC_LANGID_MONGOLIAN 57 # define TT_MAC_LANGID_MONGOLIAN_MONGOLIAN_SCRIPT 57 # define TT_MAC_LANGID_MONGOLIAN_CYRILLIC_SCRIPT 58 # define TT_MAC_LANGID_PASHTO 59 # define TT_MAC_LANGID_KURDISH 60 # define TT_MAC_LANGID_KASHMIRI 61 # define TT_MAC_LANGID_SINDHI 62 # define TT_MAC_LANGID_TIBETAN 63 # define TT_MAC_LANGID_NEPALI 64 # define TT_MAC_LANGID_SANSKRIT 65 # define TT_MAC_LANGID_MARATHI 66 # define TT_MAC_LANGID_BENGALI 67 # define TT_MAC_LANGID_ASSAMESE 68 # define TT_MAC_LANGID_GUJARATI 69 # define TT_MAC_LANGID_PUNJABI 70 # define TT_MAC_LANGID_ORIYA 71 # define TT_MAC_LANGID_MALAYALAM 72 # define TT_MAC_LANGID_KANNADA 73 # define TT_MAC_LANGID_TAMIL 74 # define TT_MAC_LANGID_TELUGU 75 # define TT_MAC_LANGID_SINHALESE 76 # define TT_MAC_LANGID_BURMESE 77 # define TT_MAC_LANGID_KHMER 78 # define TT_MAC_LANGID_LAO 79 # define TT_MAC_LANGID_VIETNAMESE 80 # define TT_MAC_LANGID_INDONESIAN 81 # define TT_MAC_LANGID_TAGALOG 82 # define TT_MAC_LANGID_MALAY_ROMAN_SCRIPT 83 # define TT_MAC_LANGID_MALAY_ARABIC_SCRIPT 84 # define TT_MAC_LANGID_AMHARIC 85 # define TT_MAC_LANGID_TIGRINYA 86 # define TT_MAC_LANGID_GALLA 87 # define TT_MAC_LANGID_SOMALI 88 # define TT_MAC_LANGID_SWAHILI 89 # define TT_MAC_LANGID_RUANDA 90 # define TT_MAC_LANGID_RUNDI 91 # define TT_MAC_LANGID_CHEWA 92 # define TT_MAC_LANGID_MALAGASY 93 # define TT_MAC_LANGID_ESPERANTO 94 # define TT_MAC_LANGID_WELSH 128 # define TT_MAC_LANGID_BASQUE 129 # define TT_MAC_LANGID_CATALAN 130 # define TT_MAC_LANGID_LATIN 131 # define TT_MAC_LANGID_QUECHUA 132 # define TT_MAC_LANGID_GUARANI 133 # define TT_MAC_LANGID_AYMARA 134 # define TT_MAC_LANGID_TATAR 135 # define TT_MAC_LANGID_UIGHUR 136 # define TT_MAC_LANGID_DZONGKHA 137 # define TT_MAC_LANGID_JAVANESE 138 # define TT_MAC_LANGID_SUNDANESE 139 /* The following codes are new as of 2000-03-10 */ # define TT_MAC_LANGID_GALICIAN 140 # define TT_MAC_LANGID_AFRIKAANS 141 # define TT_MAC_LANGID_BRETON 142 # define TT_MAC_LANGID_INUKTITUT 143 # define TT_MAC_LANGID_SCOTTISH_GAELIC 144 # define TT_MAC_LANGID_MANX_GAELIC 145 # define TT_MAC_LANGID_IRISH_GAELIC 146 # define TT_MAC_LANGID_TONGAN 147 # define TT_MAC_LANGID_GREEK_POLYTONIC 148 # define TT_MAC_LANGID_GREELANDIC 149 # define TT_MAC_LANGID_AZERBAIJANI_ROMAN_SCRIPT 150 Possible values of the language identifier field in the name records of the SFNT name table if the platform identifier code is TT_PLATFORM_MACINTOSH . These values are also used as return values for function FT_Get_CMap_Language_ID . The canonical source for Apple's IDs is https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6name.html TT_MS_LANGID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MS_LANGID_ARABIC_SAUDI_ARABIA 0x0401 # define TT_MS_LANGID_ARABIC_IRAQ 0x0801 # define TT_MS_LANGID_ARABIC_EGYPT 0x0C01 # define TT_MS_LANGID_ARABIC_LIBYA 0x1001 # define TT_MS_LANGID_ARABIC_ALGERIA 0x1401 # define TT_MS_LANGID_ARABIC_MOROCCO 0x1801 # define TT_MS_LANGID_ARABIC_TUNISIA 0x1C01 # define TT_MS_LANGID_ARABIC_OMAN 0x2001 # define TT_MS_LANGID_ARABIC_YEMEN 0x2401 # define TT_MS_LANGID_ARABIC_SYRIA 0x2801 # define TT_MS_LANGID_ARABIC_JORDAN 0x2C01 # define TT_MS_LANGID_ARABIC_LEBANON 0x3001 # define TT_MS_LANGID_ARABIC_KUWAIT 0x3401 # define TT_MS_LANGID_ARABIC_UAE 0x3801 # define TT_MS_LANGID_ARABIC_BAHRAIN 0x3C01 # define TT_MS_LANGID_ARABIC_QATAR 0x4001 # define TT_MS_LANGID_BULGARIAN_BULGARIA 0x0402 # define TT_MS_LANGID_CATALAN_CATALAN 0x0403 # define TT_MS_LANGID_CHINESE_TAIWAN 0x0404 # define TT_MS_LANGID_CHINESE_PRC 0x0804 # define TT_MS_LANGID_CHINESE_HONG_KONG 0x0C04 # define TT_MS_LANGID_CHINESE_SINGAPORE 0x1004 # define TT_MS_LANGID_CHINESE_MACAO 0x1404 # define TT_MS_LANGID_CZECH_CZECH_REPUBLIC 0x0405 # define TT_MS_LANGID_DANISH_DENMARK 0x0406 # define TT_MS_LANGID_GERMAN_GERMANY 0x0407 # define TT_MS_LANGID_GERMAN_SWITZERLAND 0x0807 # define TT_MS_LANGID_GERMAN_AUSTRIA 0x0C07 # define TT_MS_LANGID_GERMAN_LUXEMBOURG 0x1007 # define TT_MS_LANGID_GERMAN_LIECHTENSTEIN 0x1407 # define TT_MS_LANGID_GREEK_GREECE 0x0408 # define TT_MS_LANGID_ENGLISH_UNITED_STATES 0x0409 # define TT_MS_LANGID_ENGLISH_UNITED_KINGDOM 0x0809 # define TT_MS_LANGID_ENGLISH_AUSTRALIA 0x0C09 # define TT_MS_LANGID_ENGLISH_CANADA 0x1009 # define TT_MS_LANGID_ENGLISH_NEW_ZEALAND 0x1409 # define TT_MS_LANGID_ENGLISH_IRELAND 0x1809 # define TT_MS_LANGID_ENGLISH_SOUTH_AFRICA 0x1C09 # define TT_MS_LANGID_ENGLISH_JAMAICA 0x2009 # define TT_MS_LANGID_ENGLISH_CARIBBEAN 0x2409 # define TT_MS_LANGID_ENGLISH_BELIZE 0x2809 # define TT_MS_LANGID_ENGLISH_TRINIDAD 0x2C09 # define TT_MS_LANGID_ENGLISH_ZIMBABWE 0x3009 # define TT_MS_LANGID_ENGLISH_PHILIPPINES 0x3409 # define TT_MS_LANGID_ENGLISH_INDIA 0x4009 # define TT_MS_LANGID_ENGLISH_MALAYSIA 0x4409 # define TT_MS_LANGID_ENGLISH_SINGAPORE 0x4809 # define TT_MS_LANGID_SPANISH_SPAIN_TRADITIONAL_SORT 0x040A # define TT_MS_LANGID_SPANISH_MEXICO 0x080A # define TT_MS_LANGID_SPANISH_SPAIN_MODERN_SORT 0x0C0A # define TT_MS_LANGID_SPANISH_GUATEMALA 0x100A # define TT_MS_LANGID_SPANISH_COSTA_RICA 0x140A # define TT_MS_LANGID_SPANISH_PANAMA 0x180A # define TT_MS_LANGID_SPANISH_DOMINICAN_REPUBLIC 0x1C0A # define TT_MS_LANGID_SPANISH_VENEZUELA 0x200A # define TT_MS_LANGID_SPANISH_COLOMBIA 0x240A # define TT_MS_LANGID_SPANISH_PERU 0x280A # define TT_MS_LANGID_SPANISH_ARGENTINA 0x2C0A # define TT_MS_LANGID_SPANISH_ECUADOR 0x300A # define TT_MS_LANGID_SPANISH_CHILE 0x340A # define TT_MS_LANGID_SPANISH_URUGUAY 0x380A # define TT_MS_LANGID_SPANISH_PARAGUAY 0x3C0A # define TT_MS_LANGID_SPANISH_BOLIVIA 0x400A # define TT_MS_LANGID_SPANISH_EL_SALVADOR 0x440A # define TT_MS_LANGID_SPANISH_HONDURAS 0x480A # define TT_MS_LANGID_SPANISH_NICARAGUA 0x4C0A # define TT_MS_LANGID_SPANISH_PUERTO_RICO 0x500A # define TT_MS_LANGID_SPANISH_UNITED_STATES 0x540A # define TT_MS_LANGID_FINNISH_FINLAND 0x040B # define TT_MS_LANGID_FRENCH_FRANCE 0x040C # define TT_MS_LANGID_FRENCH_BELGIUM 0x080C # define TT_MS_LANGID_FRENCH_CANADA 0x0C0C # define TT_MS_LANGID_FRENCH_SWITZERLAND 0x100C # define TT_MS_LANGID_FRENCH_LUXEMBOURG 0x140C # define TT_MS_LANGID_FRENCH_MONACO 0x180C # define TT_MS_LANGID_HEBREW_ISRAEL 0x040D # define TT_MS_LANGID_HUNGARIAN_HUNGARY 0x040E # define TT_MS_LANGID_ICELANDIC_ICELAND 0x040F # define TT_MS_LANGID_ITALIAN_ITALY 0x0410 # define TT_MS_LANGID_ITALIAN_SWITZERLAND 0x0810 # define TT_MS_LANGID_JAPANESE_JAPAN 0x0411 # define TT_MS_LANGID_KOREAN_KOREA 0x0412 # define TT_MS_LANGID_DUTCH_NETHERLANDS 0x0413 # define TT_MS_LANGID_DUTCH_BELGIUM 0x0813 # define TT_MS_LANGID_NORWEGIAN_NORWAY_BOKMAL 0x0414 # define TT_MS_LANGID_NORWEGIAN_NORWAY_NYNORSK 0x0814 # define TT_MS_LANGID_POLISH_POLAND 0x0415 # define TT_MS_LANGID_PORTUGUESE_BRAZIL 0x0416 # define TT_MS_LANGID_PORTUGUESE_PORTUGAL 0x0816 # define TT_MS_LANGID_ROMANSH_SWITZERLAND 0x0417 # define TT_MS_LANGID_ROMANIAN_ROMANIA 0x0418 # define TT_MS_LANGID_RUSSIAN_RUSSIA 0x0419 # define TT_MS_LANGID_CROATIAN_CROATIA 0x041A # define TT_MS_LANGID_SERBIAN_SERBIA_LATIN 0x081A # define TT_MS_LANGID_SERBIAN_SERBIA_CYRILLIC 0x0C1A # define TT_MS_LANGID_CROATIAN_BOSNIA_HERZEGOVINA 0x101A # define TT_MS_LANGID_BOSNIAN_BOSNIA_HERZEGOVINA 0x141A # define TT_MS_LANGID_SERBIAN_BOSNIA_HERZ_LATIN 0x181A # define TT_MS_LANGID_SERBIAN_BOSNIA_HERZ_CYRILLIC 0x1C1A # define TT_MS_LANGID_BOSNIAN_BOSNIA_HERZ_CYRILLIC 0x201A # define TT_MS_LANGID_SLOVAK_SLOVAKIA 0x041B # define TT_MS_LANGID_ALBANIAN_ALBANIA 0x041C # define TT_MS_LANGID_SWEDISH_SWEDEN 0x041D # define TT_MS_LANGID_SWEDISH_FINLAND 0x081D # define TT_MS_LANGID_THAI_THAILAND 0x041E # define TT_MS_LANGID_TURKISH_TURKEY 0x041F # define TT_MS_LANGID_URDU_PAKISTAN 0x0420 # define TT_MS_LANGID_INDONESIAN_INDONESIA 0x0421 # define TT_MS_LANGID_UKRAINIAN_UKRAINE 0x0422 # define TT_MS_LANGID_BELARUSIAN_BELARUS 0x0423 # define TT_MS_LANGID_SLOVENIAN_SLOVENIA 0x0424 # define TT_MS_LANGID_ESTONIAN_ESTONIA 0x0425 # define TT_MS_LANGID_LATVIAN_LATVIA 0x0426 # define TT_MS_LANGID_LITHUANIAN_LITHUANIA 0x0427 # define TT_MS_LANGID_TAJIK_TAJIKISTAN 0x0428 # define TT_MS_LANGID_VIETNAMESE_VIET_NAM 0x042A # define TT_MS_LANGID_ARMENIAN_ARMENIA 0x042B # define TT_MS_LANGID_AZERI_AZERBAIJAN_LATIN 0x042C # define TT_MS_LANGID_AZERI_AZERBAIJAN_CYRILLIC 0x082C # define TT_MS_LANGID_BASQUE_BASQUE 0x042D # define TT_MS_LANGID_UPPER_SORBIAN_GERMANY 0x042E # define TT_MS_LANGID_LOWER_SORBIAN_GERMANY 0x082E # define TT_MS_LANGID_MACEDONIAN_MACEDONIA 0x042F # define TT_MS_LANGID_SETSWANA_SOUTH_AFRICA 0x0432 # define TT_MS_LANGID_ISIXHOSA_SOUTH_AFRICA 0x0434 # define TT_MS_LANGID_ISIZULU_SOUTH_AFRICA 0x0435 # define TT_MS_LANGID_AFRIKAANS_SOUTH_AFRICA 0x0436 # define TT_MS_LANGID_GEORGIAN_GEORGIA 0x0437 # define TT_MS_LANGID_FAEROESE_FAEROE_ISLANDS 0x0438 # define TT_MS_LANGID_HINDI_INDIA 0x0439 # define TT_MS_LANGID_MALTESE_MALTA 0x043A # define TT_MS_LANGID_SAMI_NORTHERN_NORWAY 0x043B # define TT_MS_LANGID_SAMI_NORTHERN_SWEDEN 0x083B # define TT_MS_LANGID_SAMI_NORTHERN_FINLAND 0x0C3B # define TT_MS_LANGID_SAMI_LULE_NORWAY 0x103B # define TT_MS_LANGID_SAMI_LULE_SWEDEN 0x143B # define TT_MS_LANGID_SAMI_SOUTHERN_NORWAY 0x183B # define TT_MS_LANGID_SAMI_SOUTHERN_SWEDEN 0x1C3B # define TT_MS_LANGID_SAMI_SKOLT_FINLAND 0x203B # define TT_MS_LANGID_SAMI_INARI_FINLAND 0x243B # define TT_MS_LANGID_IRISH_IRELAND 0x083C # define TT_MS_LANGID_MALAY_MALAYSIA 0x043E # define TT_MS_LANGID_MALAY_BRUNEI_DARUSSALAM 0x083E # define TT_MS_LANGID_KAZAKH_KAZAKHSTAN 0x043F # define TT_MS_LANGID_KYRGYZ_KYRGYZSTAN /* Cyrillic*/ 0x0440 # define TT_MS_LANGID_KISWAHILI_KENYA 0x0441 # define TT_MS_LANGID_TURKMEN_TURKMENISTAN 0x0442 # define TT_MS_LANGID_UZBEK_UZBEKISTAN_LATIN 0x0443 # define TT_MS_LANGID_UZBEK_UZBEKISTAN_CYRILLIC 0x0843 # define TT_MS_LANGID_TATAR_RUSSIA 0x0444 # define TT_MS_LANGID_BENGALI_INDIA 0x0445 # define TT_MS_LANGID_BENGALI_BANGLADESH 0x0845 # define TT_MS_LANGID_PUNJABI_INDIA 0x0446 # define TT_MS_LANGID_GUJARATI_INDIA 0x0447 # define TT_MS_LANGID_ODIA_INDIA 0x0448 # define TT_MS_LANGID_TAMIL_INDIA 0x0449 # define TT_MS_LANGID_TELUGU_INDIA 0x044A # define TT_MS_LANGID_KANNADA_INDIA 0x044B # define TT_MS_LANGID_MALAYALAM_INDIA 0x044C # define TT_MS_LANGID_ASSAMESE_INDIA 0x044D # define TT_MS_LANGID_MARATHI_INDIA 0x044E # define TT_MS_LANGID_SANSKRIT_INDIA 0x044F # define TT_MS_LANGID_MONGOLIAN_MONGOLIA /* Cyrillic */ 0x0450 # define TT_MS_LANGID_MONGOLIAN_PRC 0x0850 # define TT_MS_LANGID_TIBETAN_PRC 0x0451 # define TT_MS_LANGID_WELSH_UNITED_KINGDOM 0x0452 # define TT_MS_LANGID_KHMER_CAMBODIA 0x0453 # define TT_MS_LANGID_LAO_LAOS 0x0454 # define TT_MS_LANGID_GALICIAN_GALICIAN 0x0456 # define TT_MS_LANGID_KONKANI_INDIA 0x0457 # define TT_MS_LANGID_SYRIAC_SYRIA 0x045A # define TT_MS_LANGID_SINHALA_SRI_LANKA 0x045B # define TT_MS_LANGID_INUKTITUT_CANADA 0x045D # define TT_MS_LANGID_INUKTITUT_CANADA_LATIN 0x085D # define TT_MS_LANGID_AMHARIC_ETHIOPIA 0x045E # define TT_MS_LANGID_TAMAZIGHT_ALGERIA 0x085F # define TT_MS_LANGID_NEPALI_NEPAL 0x0461 # define TT_MS_LANGID_FRISIAN_NETHERLANDS 0x0462 # define TT_MS_LANGID_PASHTO_AFGHANISTAN 0x0463 # define TT_MS_LANGID_FILIPINO_PHILIPPINES 0x0464 # define TT_MS_LANGID_DHIVEHI_MALDIVES 0x0465 # define TT_MS_LANGID_HAUSA_NIGERIA 0x0468 # define TT_MS_LANGID_YORUBA_NIGERIA 0x046A # define TT_MS_LANGID_QUECHUA_BOLIVIA 0x046B # define TT_MS_LANGID_QUECHUA_ECUADOR 0x086B # define TT_MS_LANGID_QUECHUA_PERU 0x0C6B # define TT_MS_LANGID_SESOTHO_SA_LEBOA_SOUTH_AFRICA 0x046C # define TT_MS_LANGID_BASHKIR_RUSSIA 0x046D # define TT_MS_LANGID_LUXEMBOURGISH_LUXEMBOURG 0x046E # define TT_MS_LANGID_GREENLANDIC_GREENLAND 0x046F # define TT_MS_LANGID_IGBO_NIGERIA 0x0470 # define TT_MS_LANGID_YI_PRC 0x0478 # define TT_MS_LANGID_MAPUDUNGUN_CHILE 0x047A # define TT_MS_LANGID_MOHAWK_MOHAWK 0x047C # define TT_MS_LANGID_BRETON_FRANCE 0x047E # define TT_MS_LANGID_UIGHUR_PRC 0x0480 # define TT_MS_LANGID_MAORI_NEW_ZEALAND 0x0481 # define TT_MS_LANGID_OCCITAN_FRANCE 0x0482 # define TT_MS_LANGID_CORSICAN_FRANCE 0x0483 # define TT_MS_LANGID_ALSATIAN_FRANCE 0x0484 # define TT_MS_LANGID_YAKUT_RUSSIA 0x0485 # define TT_MS_LANGID_KICHE_GUATEMALA 0x0486 # define TT_MS_LANGID_KINYARWANDA_RWANDA 0x0487 # define TT_MS_LANGID_WOLOF_SENEGAL 0x0488 # define TT_MS_LANGID_DARI_AFGHANISTAN 0x048C Possible values of the language identifier field in the name records of the SFNT name table if the platform identifier code is TT_PLATFORM_MICROSOFT . These values are also used as return values for function FT_Get_CMap_Language_ID . The canonical source for Microsoft's IDs is https://docs.microsoft.com/en-us/windows/desktop/Intl/language-identifier-constants-and-strings , however, we only provide macros for language identifiers present in the OpenType specification: Microsoft has abandoned the concept of LCIDs (language code identifiers), and format 1 of the name table provides a better mechanism for languages not covered here. More legacy values not listed in the reference can be found in the FT_TRUETYPE_IDS_H header file. TT_NAME_ID_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_NAME_ID_COPYRIGHT 0 # define TT_NAME_ID_FONT_FAMILY 1 # define TT_NAME_ID_FONT_SUBFAMILY 2 # define TT_NAME_ID_UNIQUE_ID 3 # define TT_NAME_ID_FULL_NAME 4 # define TT_NAME_ID_VERSION_STRING 5 # define TT_NAME_ID_PS_NAME 6 # define TT_NAME_ID_TRADEMARK 7 /* the following values are from the OpenType spec */ # define TT_NAME_ID_MANUFACTURER 8 # define TT_NAME_ID_DESIGNER 9 # define TT_NAME_ID_DESCRIPTION 10 # define TT_NAME_ID_VENDOR_URL 11 # define TT_NAME_ID_DESIGNER_URL 12 # define TT_NAME_ID_LICENSE 13 # define TT_NAME_ID_LICENSE_URL 14 /* number 15 is reserved */ # define TT_NAME_ID_TYPOGRAPHIC_FAMILY 16 # define TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY 17 # define TT_NAME_ID_MAC_FULL_NAME 18 /* The following code is new as of 2000-01-21 */ # define TT_NAME_ID_SAMPLE_TEXT 19 /* This is new in OpenType 1.3 */ # define TT_NAME_ID_CID_FINDFONT_NAME 20 /* This is new in OpenType 1.5 */ # define TT_NAME_ID_WWS_FAMILY 21 # define TT_NAME_ID_WWS_SUBFAMILY 22 /* This is new in OpenType 1.7 */ # define TT_NAME_ID_LIGHT_BACKGROUND 23 # define TT_NAME_ID_DARK_BACKGROUND 24 /* This is new in OpenType 1.8 */ # define TT_NAME_ID_VARIATIONS_PREFIX 25 /* these two values are deprecated */ # define TT_NAME_ID_PREFERRED_FAMILY TT_NAME_ID_TYPOGRAPHIC_FAMILY # define TT_NAME_ID_PREFERRED_SUBFAMILY TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY Possible values of the name identifier field in the name records of an SFNT name table. These values are platform independent. TT_UCR_XXX Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). /* ulUnicodeRange1 */ /* --------------- */ /* Bit 0 Basic Latin */ # define TT_UCR_BASIC_LATIN (1L 0) /* U+0020-U+007E */ /* Bit 1 C1 Controls and Latin-1 Supplement */ # define TT_UCR_LATIN1_SUPPLEMENT (1L 1) /* U+0080-U+00FF */ /* Bit 2 Latin Extended-A */ # define TT_UCR_LATIN_EXTENDED_A (1L 2) /* U+0100-U+017F */ /* Bit 3 Latin Extended-B */ # define TT_UCR_LATIN_EXTENDED_B (1L 3) /* U+0180-U+024F */ /* Bit 4 IPA Extensions */ /* Phonetic Extensions */ /* Phonetic Extensions Supplement */ # define TT_UCR_IPA_EXTENSIONS (1L 4) /* U+0250-U+02AF */ /* U+1D00-U+1D7F */ /* U+1D80-U+1DBF */ /* Bit 5 Spacing Modifier Letters */ /* Modifier Tone Letters */ # define TT_UCR_SPACING_MODIFIER (1L 5) /* U+02B0-U+02FF */ /* U+A700-U+A71F */ /* Bit 6 Combining Diacritical Marks */ /* Combining Diacritical Marks Supplement */ # define TT_UCR_COMBINING_DIACRITICAL_MARKS (1L 6) /* U+0300-U+036F */ /* U+1DC0-U+1DFF */ /* Bit 7 Greek and Coptic */ # define TT_UCR_GREEK (1L 7) /* U+0370-U+03FF */ /* Bit 8 Coptic */ # define TT_UCR_COPTIC (1L 8) /* U+2C80-U+2CFF */ /* Bit 9 Cyrillic */ /* Cyrillic Supplement */ /* Cyrillic Extended-A */ /* Cyrillic Extended-B */ # define TT_UCR_CYRILLIC (1L 9) /* U+0400-U+04FF */ /* U+0500-U+052F */ /* U+2DE0-U+2DFF */ /* U+A640-U+A69F */ /* Bit 10 Armenian */ # define TT_UCR_ARMENIAN (1L 10) /* U+0530-U+058F */ /* Bit 11 Hebrew */ # define TT_UCR_HEBREW (1L 11) /* U+0590-U+05FF */ /* Bit 12 Vai */ # define TT_UCR_VAI (1L 12) /* U+A500-U+A63F */ /* Bit 13 Arabic */ /* Arabic Supplement */ # define TT_UCR_ARABIC (1L 13) /* U+0600-U+06FF */ /* U+0750-U+077F */ /* Bit 14 NKo */ # define TT_UCR_NKO (1L 14) /* U+07C0-U+07FF */ /* Bit 15 Devanagari */ # define TT_UCR_DEVANAGARI (1L 15) /* U+0900-U+097F */ /* Bit 16 Bengali */ # define TT_UCR_BENGALI (1L 16) /* U+0980-U+09FF */ /* Bit 17 Gurmukhi */ # define TT_UCR_GURMUKHI (1L 17) /* U+0A00-U+0A7F */ /* Bit 18 Gujarati */ # define TT_UCR_GUJARATI (1L 18) /* U+0A80-U+0AFF */ /* Bit 19 Oriya */ # define TT_UCR_ORIYA (1L 19) /* U+0B00-U+0B7F */ /* Bit 20 Tamil */ # define TT_UCR_TAMIL (1L 20) /* U+0B80-U+0BFF */ /* Bit 21 Telugu */ # define TT_UCR_TELUGU (1L 21) /* U+0C00-U+0C7F */ /* Bit 22 Kannada */ # define TT_UCR_KANNADA (1L 22) /* U+0C80-U+0CFF */ /* Bit 23 Malayalam */ # define TT_UCR_MALAYALAM (1L 23) /* U+0D00-U+0D7F */ /* Bit 24 Thai */ # define TT_UCR_THAI (1L 24) /* U+0E00-U+0E7F */ /* Bit 25 Lao */ # define TT_UCR_LAO (1L 25) /* U+0E80-U+0EFF */ /* Bit 26 Georgian */ /* Georgian Supplement */ # define TT_UCR_GEORGIAN (1L 26) /* U+10A0-U+10FF */ /* U+2D00-U+2D2F */ /* Bit 27 Balinese */ # define TT_UCR_BALINESE (1L 27) /* U+1B00-U+1B7F */ /* Bit 28 Hangul Jamo */ # define TT_UCR_HANGUL_JAMO (1L 28) /* U+1100-U+11FF */ /* Bit 29 Latin Extended Additional */ /* Latin Extended-C */ /* Latin Extended-D */ # define TT_UCR_LATIN_EXTENDED_ADDITIONAL (1L 29) /* U+1E00-U+1EFF */ /* U+2C60-U+2C7F */ /* U+A720-U+A7FF */ /* Bit 30 Greek Extended */ # define TT_UCR_GREEK_EXTENDED (1L 30) /* U+1F00-U+1FFF */ /* Bit 31 General Punctuation */ /* Supplemental Punctuation */ # define TT_UCR_GENERAL_PUNCTUATION (1L 31) /* U+2000-U+206F */ /* U+2E00-U+2E7F */ /* ulUnicodeRange2 */ /* --------------- */ /* Bit 32 Superscripts And Subscripts */ # define TT_UCR_SUPERSCRIPTS_SUBSCRIPTS (1L 0) /* U+2070-U+209F */ /* Bit 33 Currency Symbols */ # define TT_UCR_CURRENCY_SYMBOLS (1L 1) /* U+20A0-U+20CF */ /* Bit 34 Combining Diacritical Marks For Symbols */ # define TT_UCR_COMBINING_DIACRITICAL_MARKS_SYMB \\ (1L 2) /* U+20D0-U+20FF */ /* Bit 35 Letterlike Symbols */ # define TT_UCR_LETTERLIKE_SYMBOLS (1L 3) /* U+2100-U+214F */ /* Bit 36 Number Forms */ # define TT_UCR_NUMBER_FORMS (1L 4) /* U+2150-U+218F */ /* Bit 37 Arrows */ /* Supplemental Arrows-A */ /* Supplemental Arrows-B */ /* Miscellaneous Symbols and Arrows */ # define TT_UCR_ARROWS (1L 5) /* U+2190-U+21FF */ /* U+27F0-U+27FF */ /* U+2900-U+297F */ /* U+2B00-U+2BFF */ /* Bit 38 Mathematical Operators */ /* Supplemental Mathematical Operators */ /* Miscellaneous Mathematical Symbols-A */ /* Miscellaneous Mathematical Symbols-B */ # define TT_UCR_MATHEMATICAL_OPERATORS (1L 6) /* U+2200-U+22FF */ /* U+2A00-U+2AFF */ /* U+27C0-U+27EF */ /* U+2980-U+29FF */ /* Bit 39 Miscellaneous Technical */ # define TT_UCR_MISCELLANEOUS_TECHNICAL (1L 7) /* U+2300-U+23FF */ /* Bit 40 Control Pictures */ # define TT_UCR_CONTROL_PICTURES (1L 8) /* U+2400-U+243F */ /* Bit 41 Optical Character Recognition */ # define TT_UCR_OCR (1L 9) /* U+2440-U+245F */ /* Bit 42 Enclosed Alphanumerics */ # define TT_UCR_ENCLOSED_ALPHANUMERICS (1L 10) /* U+2460-U+24FF */ /* Bit 43 Box Drawing */ # define TT_UCR_BOX_DRAWING (1L 11) /* U+2500-U+257F */ /* Bit 44 Block Elements */ # define TT_UCR_BLOCK_ELEMENTS (1L 12) /* U+2580-U+259F */ /* Bit 45 Geometric Shapes */ # define TT_UCR_GEOMETRIC_SHAPES (1L 13) /* U+25A0-U+25FF */ /* Bit 46 Miscellaneous Symbols */ # define TT_UCR_MISCELLANEOUS_SYMBOLS (1L 14) /* U+2600-U+26FF */ /* Bit 47 Dingbats */ # define TT_UCR_DINGBATS (1L 15) /* U+2700-U+27BF */ /* Bit 48 CJK Symbols and Punctuation */ # define TT_UCR_CJK_SYMBOLS (1L 16) /* U+3000-U+303F */ /* Bit 49 Hiragana */ # define TT_UCR_HIRAGANA (1L 17) /* U+3040-U+309F */ /* Bit 50 Katakana */ /* Katakana Phonetic Extensions */ # define TT_UCR_KATAKANA (1L 18) /* U+30A0-U+30FF */ /* U+31F0-U+31FF */ /* Bit 51 Bopomofo */ /* Bopomofo Extended */ # define TT_UCR_BOPOMOFO (1L 19) /* U+3100-U+312F */ /* U+31A0-U+31BF */ /* Bit 52 Hangul Compatibility Jamo */ # define TT_UCR_HANGUL_COMPATIBILITY_JAMO (1L 20) /* U+3130-U+318F */ /* Bit 53 Phags-Pa */ # define TT_UCR_CJK_MISC (1L 21) /* U+A840-U+A87F */ # define TT_UCR_KANBUN TT_UCR_CJK_MISC /* deprecated */ # define TT_UCR_PHAGSPA /* Bit 54 Enclosed CJK Letters and Months */ # define TT_UCR_ENCLOSED_CJK_LETTERS_MONTHS (1L 22) /* U+3200-U+32FF */ /* Bit 55 CJK Compatibility */ # define TT_UCR_CJK_COMPATIBILITY (1L 23) /* U+3300-U+33FF */ /* Bit 56 Hangul Syllables */ # define TT_UCR_HANGUL (1L 24) /* U+AC00-U+D7A3 */ /* Bit 57 High Surrogates */ /* High Private Use Surrogates */ /* Low Surrogates */ /* According to OpenType specs v.1.3+, */ /* setting bit 57 implies that there is */ /* at least one codepoint beyond the */ /* Basic Multilingual Plane that is */ /* supported by this font. So it really */ /* means = U+10000. */ # define TT_UCR_SURROGATES (1L 25) /* U+D800-U+DB7F */ /* U+DB80-U+DBFF */ /* U+DC00-U+DFFF */ # define TT_UCR_NON_PLANE_0 TT_UCR_SURROGATES /* Bit 58 Phoenician */ # define TT_UCR_PHOENICIAN (1L 26) /*U+10900-U+1091F*/ /* Bit 59 CJK Unified Ideographs */ /* CJK Radicals Supplement */ /* Kangxi Radicals */ /* Ideographic Description Characters */ /* CJK Unified Ideographs Extension A */ /* CJK Unified Ideographs Extension B */ /* Kanbun */ # define TT_UCR_CJK_UNIFIED_IDEOGRAPHS (1L 27) /* U+4E00-U+9FFF */ /* U+2E80-U+2EFF */ /* U+2F00-U+2FDF */ /* U+2FF0-U+2FFF */ /* U+3400-U+4DB5 */ /*U+20000-U+2A6DF*/ /* U+3190-U+319F */ /* Bit 60 Private Use */ # define TT_UCR_PRIVATE_USE (1L 28) /* U+E000-U+F8FF */ /* Bit 61 CJK Strokes */ /* CJK Compatibility Ideographs */ /* CJK Compatibility Ideographs Supplement */ # define TT_UCR_CJK_COMPATIBILITY_IDEOGRAPHS (1L 29) /* U+31C0-U+31EF */ /* U+F900-U+FAFF */ /*U+2F800-U+2FA1F*/ /* Bit 62 Alphabetic Presentation Forms */ # define TT_UCR_ALPHABETIC_PRESENTATION_FORMS (1L 30) /* U+FB00-U+FB4F */ /* Bit 63 Arabic Presentation Forms-A */ # define TT_UCR_ARABIC_PRESENTATION_FORMS_A (1L 31) /* U+FB50-U+FDFF */ /* ulUnicodeRange3 */ /* --------------- */ /* Bit 64 Combining Half Marks */ # define TT_UCR_COMBINING_HALF_MARKS (1L 0) /* U+FE20-U+FE2F */ /* Bit 65 Vertical forms */ /* CJK Compatibility Forms */ # define TT_UCR_CJK_COMPATIBILITY_FORMS (1L 1) /* U+FE10-U+FE1F */ /* U+FE30-U+FE4F */ /* Bit 66 Small Form Variants */ # define TT_UCR_SMALL_FORM_VARIANTS (1L 2) /* U+FE50-U+FE6F */ /* Bit 67 Arabic Presentation Forms-B */ # define TT_UCR_ARABIC_PRESENTATION_FORMS_B (1L 3) /* U+FE70-U+FEFE */ /* Bit 68 Halfwidth and Fullwidth Forms */ # define TT_UCR_HALFWIDTH_FULLWIDTH_FORMS (1L 4) /* U+FF00-U+FFEF */ /* Bit 69 Specials */ # define TT_UCR_SPECIALS (1L 5) /* U+FFF0-U+FFFD */ /* Bit 70 Tibetan */ # define TT_UCR_TIBETAN (1L 6) /* U+0F00-U+0FFF */ /* Bit 71 Syriac */ # define TT_UCR_SYRIAC (1L 7) /* U+0700-U+074F */ /* Bit 72 Thaana */ # define TT_UCR_THAANA (1L 8) /* U+0780-U+07BF */ /* Bit 73 Sinhala */ # define TT_UCR_SINHALA (1L 9) /* U+0D80-U+0DFF */ /* Bit 74 Myanmar */ # define TT_UCR_MYANMAR (1L 10) /* U+1000-U+109F */ /* Bit 75 Ethiopic */ /* Ethiopic Supplement */ /* Ethiopic Extended */ # define TT_UCR_ETHIOPIC (1L 11) /* U+1200-U+137F */ /* U+1380-U+139F */ /* U+2D80-U+2DDF */ /* Bit 76 Cherokee */ # define TT_UCR_CHEROKEE (1L 12) /* U+13A0-U+13FF */ /* Bit 77 Unified Canadian Aboriginal Syllabics */ # define TT_UCR_CANADIAN_ABORIGINAL_SYLLABICS (1L 13) /* U+1400-U+167F */ /* Bit 78 Ogham */ # define TT_UCR_OGHAM (1L 14) /* U+1680-U+169F */ /* Bit 79 Runic */ # define TT_UCR_RUNIC (1L 15) /* U+16A0-U+16FF */ /* Bit 80 Khmer */ /* Khmer Symbols */ # define TT_UCR_KHMER (1L 16) /* U+1780-U+17FF */ /* U+19E0-U+19FF */ /* Bit 81 Mongolian */ # define TT_UCR_MONGOLIAN (1L 17) /* U+1800-U+18AF */ /* Bit 82 Braille Patterns */ # define TT_UCR_BRAILLE (1L 18) /* U+2800-U+28FF */ /* Bit 83 Yi Syllables */ /* Yi Radicals */ # define TT_UCR_YI (1L 19) /* U+A000-U+A48F */ /* U+A490-U+A4CF */ /* Bit 84 Tagalog */ /* Hanunoo */ /* Buhid */ /* Tagbanwa */ # define TT_UCR_PHILIPPINE (1L 20) /* U+1700-U+171F */ /* U+1720-U+173F */ /* U+1740-U+175F */ /* U+1760-U+177F */ /* Bit 85 Old Italic */ # define TT_UCR_OLD_ITALIC (1L 21) /*U+10300-U+1032F*/ /* Bit 86 Gothic */ # define TT_UCR_GOTHIC (1L 22) /*U+10330-U+1034F*/ /* Bit 87 Deseret */ # define TT_UCR_DESERET (1L 23) /*U+10400-U+1044F*/ /* Bit 88 Byzantine Musical Symbols */ /* Musical Symbols */ /* Ancient Greek Musical Notation */ # define TT_UCR_MUSICAL_SYMBOLS (1L 24) /*U+1D000-U+1D0FF*/ /*U+1D100-U+1D1FF*/ /*U+1D200-U+1D24F*/ /* Bit 89 Mathematical Alphanumeric Symbols */ # define TT_UCR_MATH_ALPHANUMERIC_SYMBOLS (1L 25) /*U+1D400-U+1D7FF*/ /* Bit 90 Private Use (plane 15) */ /* Private Use (plane 16) */ # define TT_UCR_PRIVATE_USE_SUPPLEMENTARY (1L 26) /*U+F0000-U+FFFFD*/ /*U+100000-U+10FFFD*/ /* Bit 91 Variation Selectors */ /* Variation Selectors Supplement */ # define TT_UCR_VARIATION_SELECTORS (1L 27) /* U+FE00-U+FE0F */ /*U+E0100-U+E01EF*/ /* Bit 92 Tags */ # define TT_UCR_TAGS (1L 28) /*U+E0000-U+E007F*/ /* Bit 93 Limbu */ # define TT_UCR_LIMBU (1L 29) /* U+1900-U+194F */ /* Bit 94 Tai Le */ # define TT_UCR_TAI_LE (1L 30) /* U+1950-U+197F */ /* Bit 95 New Tai Lue */ # define TT_UCR_NEW_TAI_LUE (1L 31) /* U+1980-U+19DF */ /* ulUnicodeRange4 */ /* --------------- */ /* Bit 96 Buginese */ # define TT_UCR_BUGINESE (1L 0) /* U+1A00-U+1A1F */ /* Bit 97 Glagolitic */ # define TT_UCR_GLAGOLITIC (1L 1) /* U+2C00-U+2C5F */ /* Bit 98 Tifinagh */ # define TT_UCR_TIFINAGH (1L 2) /* U+2D30-U+2D7F */ /* Bit 99 Yijing Hexagram Symbols */ # define TT_UCR_YIJING (1L 3) /* U+4DC0-U+4DFF */ /* Bit 100 Syloti Nagri */ # define TT_UCR_SYLOTI_NAGRI (1L 4) /* U+A800-U+A82F */ /* Bit 101 Linear B Syllabary */ /* Linear B Ideograms */ /* Aegean Numbers */ # define TT_UCR_LINEAR_B (1L 5) /*U+10000-U+1007F*/ /*U+10080-U+100FF*/ /*U+10100-U+1013F*/ /* Bit 102 Ancient Greek Numbers */ # define TT_UCR_ANCIENT_GREEK_NUMBERS (1L 6) /*U+10140-U+1018F*/ /* Bit 103 Ugaritic */ # define TT_UCR_UGARITIC (1L 7) /*U+10380-U+1039F*/ /* Bit 104 Old Persian */ # define TT_UCR_OLD_PERSIAN (1L 8) /*U+103A0-U+103DF*/ /* Bit 105 Shavian */ # define TT_UCR_SHAVIAN (1L 9) /*U+10450-U+1047F*/ /* Bit 106 Osmanya */ # define TT_UCR_OSMANYA (1L 10) /*U+10480-U+104AF*/ /* Bit 107 Cypriot Syllabary */ # define TT_UCR_CYPRIOT_SYLLABARY (1L 11) /*U+10800-U+1083F*/ /* Bit 108 Kharoshthi */ # define TT_UCR_KHAROSHTHI (1L 12) /*U+10A00-U+10A5F*/ /* Bit 109 Tai Xuan Jing Symbols */ # define TT_UCR_TAI_XUAN_JING (1L 13) /*U+1D300-U+1D35F*/ /* Bit 110 Cuneiform */ /* Cuneiform Numbers and Punctuation */ # define TT_UCR_CUNEIFORM (1L 14) /*U+12000-U+123FF*/ /*U+12400-U+1247F*/ /* Bit 111 Counting Rod Numerals */ # define TT_UCR_COUNTING_ROD_NUMERALS (1L 15) /*U+1D360-U+1D37F*/ /* Bit 112 Sundanese */ # define TT_UCR_SUNDANESE (1L 16) /* U+1B80-U+1BBF */ /* Bit 113 Lepcha */ # define TT_UCR_LEPCHA (1L 17) /* U+1C00-U+1C4F */ /* Bit 114 Ol Chiki */ # define TT_UCR_OL_CHIKI (1L 18) /* U+1C50-U+1C7F */ /* Bit 115 Saurashtra */ # define TT_UCR_SAURASHTRA (1L 19) /* U+A880-U+A8DF */ /* Bit 116 Kayah Li */ # define TT_UCR_KAYAH_LI (1L 20) /* U+A900-U+A92F */ /* Bit 117 Rejang */ # define TT_UCR_REJANG (1L 21) /* U+A930-U+A95F */ /* Bit 118 Cham */ # define TT_UCR_CHAM (1L 22) /* U+AA00-U+AA5F */ /* Bit 119 Ancient Symbols */ # define TT_UCR_ANCIENT_SYMBOLS (1L 23) /*U+10190-U+101CF*/ /* Bit 120 Phaistos Disc */ # define TT_UCR_PHAISTOS_DISC (1L 24) /*U+101D0-U+101FF*/ /* Bit 121 Carian */ /* Lycian */ /* Lydian */ # define TT_UCR_OLD_ANATOLIAN (1L 25) /*U+102A0-U+102DF*/ /*U+10280-U+1029F*/ /*U+10920-U+1093F*/ /* Bit 122 Domino Tiles */ /* Mahjong Tiles */ # define TT_UCR_GAME_TILES (1L 26) /*U+1F030-U+1F09F*/ /*U+1F000-U+1F02F*/ /* Bit 123-127 Reserved for process-internal usage */ Possible bit mask values for the ulUnicodeRangeX fields in an SFNT OS/2 table.","title":"TrueType Tables"},{"location":"ft2-truetype_tables.html#truetype-tables","text":"","title":"TrueType Tables"},{"location":"ft2-truetype_tables.html#synopsis","text":"This section contains definitions of some basic tables specific to TrueType and OpenType as well as some routines used to access and process them.","title":"Synopsis"},{"location":"ft2-truetype_tables.html#tt_header","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_Header_ { FT_Fixed Table_Version; FT_Fixed Font_Revision; FT_Long CheckSum_Adjust; FT_Long Magic_Number; FT_UShort Flags; FT_UShort Units_Per_EM; FT_ULong Created [2]; FT_ULong Modified[2]; FT_Short xMin; FT_Short yMin; FT_Short xMax; FT_Short yMax; FT_UShort Mac_Style; FT_UShort Lowest_Rec_PPEM; FT_Short Font_Direction; FT_Short Index_To_Loc_Format; FT_Short Glyph_Data_Format; } TT_Header ; A structure to model a TrueType font header table. All fields follow the OpenType specification. The 64-bit timestamps are stored in two-element arrays Created and Modified , first the upper then the lower 32 bits.","title":"TT_Header"},{"location":"ft2-truetype_tables.html#tt_horiheader","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_HoriHeader_ { FT_Fixed Version; FT_Short Ascender; FT_Short Descender; FT_Short Line_Gap; FT_UShort advance_Width_Max; /* advance width maximum */ FT_Short min_Left_Side_Bearing; /* minimum left-sb */ FT_Short min_Right_Side_Bearing; /* minimum right-sb */ FT_Short xMax_Extent; /* xmax extents */ FT_Short caret_Slope_Rise; FT_Short caret_Slope_Run; FT_Short caret_Offset; FT_Short Reserved[4]; FT_Short metric_Data_Format; FT_UShort number_Of_HMetrics; /* The following fields are not defined by the OpenType specification */ /* but they are used to connect the metrics header to the relevant */ /* 'hmtx' table. */ void * long_metrics; void * short_metrics; } TT_HoriHeader ; A structure to model a TrueType horizontal header, the hhea table, as well as the corresponding horizontal metrics table, hmtx .","title":"TT_HoriHeader"},{"location":"ft2-truetype_tables.html#tt_vertheader","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_VertHeader_ { FT_Fixed Version; FT_Short Ascender; FT_Short Descender; FT_Short Line_Gap; FT_UShort advance_Height_Max; /* advance height maximum */ FT_Short min_Top_Side_Bearing; /* minimum top-sb */ FT_Short min_Bottom_Side_Bearing; /* minimum bottom-sb */ FT_Short yMax_Extent; /* ymax extents */ FT_Short caret_Slope_Rise; FT_Short caret_Slope_Run; FT_Short caret_Offset; FT_Short Reserved[4]; FT_Short metric_Data_Format; FT_UShort number_Of_VMetrics; /* The following fields are not defined by the OpenType specification */ /* but they are used to connect the metrics header to the relevant */ /* 'vmtx' table. */ void * long_metrics; void * short_metrics; } TT_VertHeader ; A structure used to model a TrueType vertical header, the vhea table, as well as the corresponding vertical metrics table, vmtx .","title":"TT_VertHeader"},{"location":"ft2-truetype_tables.html#tt_os2","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_OS2_ { FT_UShort version; /* 0x0001 - more or 0xFFFF */ FT_Short xAvgCharWidth; FT_UShort usWeightClass; FT_UShort usWidthClass; FT_UShort fsType; FT_Short ySubscriptXSize; FT_Short ySubscriptYSize; FT_Short ySubscriptXOffset; FT_Short ySubscriptYOffset; FT_Short ySuperscriptXSize; FT_Short ySuperscriptYSize; FT_Short ySuperscriptXOffset; FT_Short ySuperscriptYOffset; FT_Short yStrikeoutSize; FT_Short yStrikeoutPosition; FT_Short sFamilyClass; FT_Byte panose[10]; FT_ULong ulUnicodeRange1; /* Bits 0-31 */ FT_ULong ulUnicodeRange2; /* Bits 32-63 */ FT_ULong ulUnicodeRange3; /* Bits 64-95 */ FT_ULong ulUnicodeRange4; /* Bits 96-127 */ FT_Char achVendID[4]; FT_UShort fsSelection; FT_UShort usFirstCharIndex; FT_UShort usLastCharIndex; FT_Short sTypoAscender; FT_Short sTypoDescender; FT_Short sTypoLineGap; FT_UShort usWinAscent; FT_UShort usWinDescent; /* only version 1 and higher: */ FT_ULong ulCodePageRange1; /* Bits 0-31 */ FT_ULong ulCodePageRange2; /* Bits 32-63 */ /* only version 2 and higher: */ FT_Short sxHeight; FT_Short sCapHeight; FT_UShort usDefaultChar; FT_UShort usBreakChar; FT_UShort usMaxContext; /* only version 5 and higher: */ FT_UShort usLowerOpticalPointSize; /* in twips (1/20th points) */ FT_UShort usUpperOpticalPointSize; /* in twips (1/20th points) */ } TT_OS2 ; A structure to model a TrueType OS/2 table. All fields comply to the OpenType specification. Note that we now support old Mac fonts that do not include an OS/2 table. In this case, the version field is always set to 0xFFFF.","title":"TT_OS2"},{"location":"ft2-truetype_tables.html#tt_postscript","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_Postscript_ { FT_Fixed FormatType; FT_Fixed italicAngle; FT_Short underlinePosition; FT_Short underlineThickness; FT_ULong isFixedPitch; FT_ULong minMemType42; FT_ULong maxMemType42; FT_ULong minMemType1; FT_ULong maxMemType1; /* Glyph names follow in the 'post' table, but we don't */ /* load them by default. */ } TT_Postscript ; A structure to model a TrueType post table. All fields comply to the OpenType specification. This structure does not reference a font's PostScript glyph names; use FT_Get_Glyph_Name to retrieve them.","title":"TT_Postscript"},{"location":"ft2-truetype_tables.html#tt_pclt","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_PCLT_ { FT_Fixed Version; FT_ULong FontNumber; FT_UShort Pitch; FT_UShort xHeight; FT_UShort Style; FT_UShort TypeFamily; FT_UShort CapHeight; FT_UShort SymbolSet; FT_Char TypeFace[16]; FT_Char CharacterComplement[8]; FT_Char FileName[6]; FT_Char StrokeWeight; FT_Char WidthType; FT_Byte SerifStyle; FT_Byte Reserved; } TT_PCLT ; A structure to model a TrueType PCLT table. All fields comply to the OpenType specification.","title":"TT_PCLT"},{"location":"ft2-truetype_tables.html#tt_maxprofile","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef struct TT_MaxProfile_ { FT_Fixed version; FT_UShort numGlyphs; FT_UShort maxPoints; FT_UShort maxContours; FT_UShort maxCompositePoints; FT_UShort maxCompositeContours; FT_UShort maxZones; FT_UShort maxTwilightPoints; FT_UShort maxStorage; FT_UShort maxFunctionDefs; FT_UShort maxInstructionDefs; FT_UShort maxStackElements; FT_UShort maxSizeOfInstructions; FT_UShort maxComponentElements; FT_UShort maxComponentDepth; } TT_MaxProfile ; The maximum profile ( maxp ) table contains many max values, which can be used to pre-allocate arrays for speeding up glyph loading and hinting.","title":"TT_MaxProfile"},{"location":"ft2-truetype_tables.html#ft_sfnt_tag","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). typedef enum FT_Sfnt_Tag_ { FT_SFNT_HEAD , FT_SFNT_MAXP , FT_SFNT_OS2 , FT_SFNT_HHEA , FT_SFNT_VHEA , FT_SFNT_POST , FT_SFNT_PCLT , FT_SFNT_MAX } FT_Sfnt_Tag ; /* these constants are deprecated; use the corresponding ` FT_Sfnt_Tag ` */ /* values instead */ # define ft_sfnt_head FT_SFNT_HEAD # define ft_sfnt_maxp FT_SFNT_MAXP # define ft_sfnt_os2 FT_SFNT_OS2 # define ft_sfnt_hhea FT_SFNT_HHEA # define ft_sfnt_vhea FT_SFNT_VHEA # define ft_sfnt_post FT_SFNT_POST # define ft_sfnt_pclt FT_SFNT_PCLT An enumeration to specify indices of SFNT tables loaded and parsed by FreeType during initialization of an SFNT font. Used in the FT_Get_Sfnt_Table API function.","title":"FT_Sfnt_Tag"},{"location":"ft2-truetype_tables.html#ft_get_sfnt_table","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( void * ) FT_Get_Sfnt_Table ( FT_Face face, FT_Sfnt_Tag tag ); Return a pointer to a given SFNT table stored within a face.","title":"FT_Get_Sfnt_Table"},{"location":"ft2-truetype_tables.html#ft_load_sfnt_table","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_Error ) FT_Load_Sfnt_Table ( FT_Face face, FT_ULong tag, FT_Long offset, FT_Byte * buffer, FT_ULong * length ); Load any SFNT font table into client memory.","title":"FT_Load_Sfnt_Table"},{"location":"ft2-truetype_tables.html#ft_sfnt_table_info","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_Error ) FT_Sfnt_Table_Info ( FT_Face face, FT_UInt table_index, FT_ULong *tag, FT_ULong *length ); Return information on an SFNT table.","title":"FT_Sfnt_Table_Info"},{"location":"ft2-truetype_tables.html#ft_get_cmap_language_id","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_ULong ) FT_Get_CMap_Language_ID ( FT_CharMap charmap ); Return cmap language ID as specified in the OpenType standard. Definitions of language ID values are in file FT_TRUETYPE_IDS_H .","title":"FT_Get_CMap_Language_ID"},{"location":"ft2-truetype_tables.html#ft_get_cmap_format","text":"Defined in FT_TRUETYPE_TABLES_H (freetype/tttables.h). FT_EXPORT( FT_Long ) FT_Get_CMap_Format ( FT_CharMap charmap ); Return the format of an SFNT cmap table.","title":"FT_Get_CMap_Format"},{"location":"ft2-truetype_tables.html#ft_param_tag_unpatented_hinting","text":"# define FT_PARAM_TAG_UNPATENTED_HINTING \\ FT_MAKE_TAG ( 'u', 'n', 'p', 'a' ) Deprecated, no effect. Previously: A constant used as the tag of an FT_Parameter structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by FT_Open_Face .","title":"FT_PARAM_TAG_UNPATENTED_HINTING"},{"location":"ft2-truetype_tables.html#tt_platform_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_PLATFORM_APPLE_UNICODE 0 # define TT_PLATFORM_MACINTOSH 1 # define TT_PLATFORM_ISO 2 /* deprecated */ # define TT_PLATFORM_MICROSOFT 3 # define TT_PLATFORM_CUSTOM 4 # define TT_PLATFORM_ADOBE 7 /* artificial */ A list of valid values for the platform_id identifier code in FT_CharMapRec and FT_SfntName structures.","title":"TT_PLATFORM_XXX"},{"location":"ft2-truetype_tables.html#tt_apple_id_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_APPLE_ID_DEFAULT 0 /* Unicode 1.0 */ # define TT_APPLE_ID_UNICODE_1_1 1 /* specify Hangul at U+34xx */ # define TT_APPLE_ID_ISO_10646 2 /* deprecated */ # define TT_APPLE_ID_UNICODE_2_0 3 /* or later */ # define TT_APPLE_ID_UNICODE_32 4 /* 2.0 or later, full repertoire */ # define TT_APPLE_ID_VARIANT_SELECTOR 5 /* variation selector data */ # define TT_APPLE_ID_FULL_UNICODE 6 /* used with type 13 cmaps */ A list of valid values for the encoding_id for TT_PLATFORM_APPLE_UNICODE charmaps and name entries.","title":"TT_APPLE_ID_XXX"},{"location":"ft2-truetype_tables.html#tt_mac_id_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MAC_ID_ROMAN 0 # define TT_MAC_ID_JAPANESE 1 # define TT_MAC_ID_TRADITIONAL_CHINESE 2 # define TT_MAC_ID_KOREAN 3 # define TT_MAC_ID_ARABIC 4 # define TT_MAC_ID_HEBREW 5 # define TT_MAC_ID_GREEK 6 # define TT_MAC_ID_RUSSIAN 7 # define TT_MAC_ID_RSYMBOL 8 # define TT_MAC_ID_DEVANAGARI 9 # define TT_MAC_ID_GURMUKHI 10 # define TT_MAC_ID_GUJARATI 11 # define TT_MAC_ID_ORIYA 12 # define TT_MAC_ID_BENGALI 13 # define TT_MAC_ID_TAMIL 14 # define TT_MAC_ID_TELUGU 15 # define TT_MAC_ID_KANNADA 16 # define TT_MAC_ID_MALAYALAM 17 # define TT_MAC_ID_SINHALESE 18 # define TT_MAC_ID_BURMESE 19 # define TT_MAC_ID_KHMER 20 # define TT_MAC_ID_THAI 21 # define TT_MAC_ID_LAOTIAN 22 # define TT_MAC_ID_GEORGIAN 23 # define TT_MAC_ID_ARMENIAN 24 # define TT_MAC_ID_MALDIVIAN 25 # define TT_MAC_ID_SIMPLIFIED_CHINESE 25 # define TT_MAC_ID_TIBETAN 26 # define TT_MAC_ID_MONGOLIAN 27 # define TT_MAC_ID_GEEZ 28 # define TT_MAC_ID_SLAVIC 29 # define TT_MAC_ID_VIETNAMESE 30 # define TT_MAC_ID_SINDHI 31 # define TT_MAC_ID_UNINTERP 32 A list of valid values for the encoding_id for TT_PLATFORM_MACINTOSH charmaps and name entries.","title":"TT_MAC_ID_XXX"},{"location":"ft2-truetype_tables.html#tt_iso_id_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_ISO_ID_7BIT_ASCII 0 # define TT_ISO_ID_10646 1 # define TT_ISO_ID_8859_1 2 A list of valid values for the encoding_id for TT_PLATFORM_ISO charmaps and name entries. Their use is now deprecated.","title":"TT_ISO_ID_XXX"},{"location":"ft2-truetype_tables.html#tt_ms_id_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MS_ID_SYMBOL_CS 0 # define TT_MS_ID_UNICODE_CS 1 # define TT_MS_ID_SJIS 2 # define TT_MS_ID_PRC 3 # define TT_MS_ID_BIG_5 4 # define TT_MS_ID_WANSUNG 5 # define TT_MS_ID_JOHAB 6 # define TT_MS_ID_UCS_4 10 /* this value is deprecated */ # define TT_MS_ID_GB2312 TT_MS_ID_PRC A list of valid values for the encoding_id for TT_PLATFORM_MICROSOFT charmaps and name entries.","title":"TT_MS_ID_XXX"},{"location":"ft2-truetype_tables.html#tt_adobe_id_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_ADOBE_ID_STANDARD 0 # define TT_ADOBE_ID_EXPERT 1 # define TT_ADOBE_ID_CUSTOM 2 # define TT_ADOBE_ID_LATIN_1 3 A list of valid values for the encoding_id for TT_PLATFORM_ADOBE charmaps. This is a FreeType-specific extension!","title":"TT_ADOBE_ID_XXX"},{"location":"ft2-truetype_tables.html#tt_mac_langid_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MAC_LANGID_ENGLISH 0 # define TT_MAC_LANGID_FRENCH 1 # define TT_MAC_LANGID_GERMAN 2 # define TT_MAC_LANGID_ITALIAN 3 # define TT_MAC_LANGID_DUTCH 4 # define TT_MAC_LANGID_SWEDISH 5 # define TT_MAC_LANGID_SPANISH 6 # define TT_MAC_LANGID_DANISH 7 # define TT_MAC_LANGID_PORTUGUESE 8 # define TT_MAC_LANGID_NORWEGIAN 9 # define TT_MAC_LANGID_HEBREW 10 # define TT_MAC_LANGID_JAPANESE 11 # define TT_MAC_LANGID_ARABIC 12 # define TT_MAC_LANGID_FINNISH 13 # define TT_MAC_LANGID_GREEK 14 # define TT_MAC_LANGID_ICELANDIC 15 # define TT_MAC_LANGID_MALTESE 16 # define TT_MAC_LANGID_TURKISH 17 # define TT_MAC_LANGID_CROATIAN 18 # define TT_MAC_LANGID_CHINESE_TRADITIONAL 19 # define TT_MAC_LANGID_URDU 20 # define TT_MAC_LANGID_HINDI 21 # define TT_MAC_LANGID_THAI 22 # define TT_MAC_LANGID_KOREAN 23 # define TT_MAC_LANGID_LITHUANIAN 24 # define TT_MAC_LANGID_POLISH 25 # define TT_MAC_LANGID_HUNGARIAN 26 # define TT_MAC_LANGID_ESTONIAN 27 # define TT_MAC_LANGID_LETTISH 28 # define TT_MAC_LANGID_SAAMISK 29 # define TT_MAC_LANGID_FAEROESE 30 # define TT_MAC_LANGID_FARSI 31 # define TT_MAC_LANGID_RUSSIAN 32 # define TT_MAC_LANGID_CHINESE_SIMPLIFIED 33 # define TT_MAC_LANGID_FLEMISH 34 # define TT_MAC_LANGID_IRISH 35 # define TT_MAC_LANGID_ALBANIAN 36 # define TT_MAC_LANGID_ROMANIAN 37 # define TT_MAC_LANGID_CZECH 38 # define TT_MAC_LANGID_SLOVAK 39 # define TT_MAC_LANGID_SLOVENIAN 40 # define TT_MAC_LANGID_YIDDISH 41 # define TT_MAC_LANGID_SERBIAN 42 # define TT_MAC_LANGID_MACEDONIAN 43 # define TT_MAC_LANGID_BULGARIAN 44 # define TT_MAC_LANGID_UKRAINIAN 45 # define TT_MAC_LANGID_BYELORUSSIAN 46 # define TT_MAC_LANGID_UZBEK 47 # define TT_MAC_LANGID_KAZAKH 48 # define TT_MAC_LANGID_AZERBAIJANI 49 # define TT_MAC_LANGID_AZERBAIJANI_CYRILLIC_SCRIPT 49 # define TT_MAC_LANGID_AZERBAIJANI_ARABIC_SCRIPT 50 # define TT_MAC_LANGID_ARMENIAN 51 # define TT_MAC_LANGID_GEORGIAN 52 # define TT_MAC_LANGID_MOLDAVIAN 53 # define TT_MAC_LANGID_KIRGHIZ 54 # define TT_MAC_LANGID_TAJIKI 55 # define TT_MAC_LANGID_TURKMEN 56 # define TT_MAC_LANGID_MONGOLIAN 57 # define TT_MAC_LANGID_MONGOLIAN_MONGOLIAN_SCRIPT 57 # define TT_MAC_LANGID_MONGOLIAN_CYRILLIC_SCRIPT 58 # define TT_MAC_LANGID_PASHTO 59 # define TT_MAC_LANGID_KURDISH 60 # define TT_MAC_LANGID_KASHMIRI 61 # define TT_MAC_LANGID_SINDHI 62 # define TT_MAC_LANGID_TIBETAN 63 # define TT_MAC_LANGID_NEPALI 64 # define TT_MAC_LANGID_SANSKRIT 65 # define TT_MAC_LANGID_MARATHI 66 # define TT_MAC_LANGID_BENGALI 67 # define TT_MAC_LANGID_ASSAMESE 68 # define TT_MAC_LANGID_GUJARATI 69 # define TT_MAC_LANGID_PUNJABI 70 # define TT_MAC_LANGID_ORIYA 71 # define TT_MAC_LANGID_MALAYALAM 72 # define TT_MAC_LANGID_KANNADA 73 # define TT_MAC_LANGID_TAMIL 74 # define TT_MAC_LANGID_TELUGU 75 # define TT_MAC_LANGID_SINHALESE 76 # define TT_MAC_LANGID_BURMESE 77 # define TT_MAC_LANGID_KHMER 78 # define TT_MAC_LANGID_LAO 79 # define TT_MAC_LANGID_VIETNAMESE 80 # define TT_MAC_LANGID_INDONESIAN 81 # define TT_MAC_LANGID_TAGALOG 82 # define TT_MAC_LANGID_MALAY_ROMAN_SCRIPT 83 # define TT_MAC_LANGID_MALAY_ARABIC_SCRIPT 84 # define TT_MAC_LANGID_AMHARIC 85 # define TT_MAC_LANGID_TIGRINYA 86 # define TT_MAC_LANGID_GALLA 87 # define TT_MAC_LANGID_SOMALI 88 # define TT_MAC_LANGID_SWAHILI 89 # define TT_MAC_LANGID_RUANDA 90 # define TT_MAC_LANGID_RUNDI 91 # define TT_MAC_LANGID_CHEWA 92 # define TT_MAC_LANGID_MALAGASY 93 # define TT_MAC_LANGID_ESPERANTO 94 # define TT_MAC_LANGID_WELSH 128 # define TT_MAC_LANGID_BASQUE 129 # define TT_MAC_LANGID_CATALAN 130 # define TT_MAC_LANGID_LATIN 131 # define TT_MAC_LANGID_QUECHUA 132 # define TT_MAC_LANGID_GUARANI 133 # define TT_MAC_LANGID_AYMARA 134 # define TT_MAC_LANGID_TATAR 135 # define TT_MAC_LANGID_UIGHUR 136 # define TT_MAC_LANGID_DZONGKHA 137 # define TT_MAC_LANGID_JAVANESE 138 # define TT_MAC_LANGID_SUNDANESE 139 /* The following codes are new as of 2000-03-10 */ # define TT_MAC_LANGID_GALICIAN 140 # define TT_MAC_LANGID_AFRIKAANS 141 # define TT_MAC_LANGID_BRETON 142 # define TT_MAC_LANGID_INUKTITUT 143 # define TT_MAC_LANGID_SCOTTISH_GAELIC 144 # define TT_MAC_LANGID_MANX_GAELIC 145 # define TT_MAC_LANGID_IRISH_GAELIC 146 # define TT_MAC_LANGID_TONGAN 147 # define TT_MAC_LANGID_GREEK_POLYTONIC 148 # define TT_MAC_LANGID_GREELANDIC 149 # define TT_MAC_LANGID_AZERBAIJANI_ROMAN_SCRIPT 150 Possible values of the language identifier field in the name records of the SFNT name table if the platform identifier code is TT_PLATFORM_MACINTOSH . These values are also used as return values for function FT_Get_CMap_Language_ID . The canonical source for Apple's IDs is https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6name.html","title":"TT_MAC_LANGID_XXX"},{"location":"ft2-truetype_tables.html#tt_ms_langid_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_MS_LANGID_ARABIC_SAUDI_ARABIA 0x0401 # define TT_MS_LANGID_ARABIC_IRAQ 0x0801 # define TT_MS_LANGID_ARABIC_EGYPT 0x0C01 # define TT_MS_LANGID_ARABIC_LIBYA 0x1001 # define TT_MS_LANGID_ARABIC_ALGERIA 0x1401 # define TT_MS_LANGID_ARABIC_MOROCCO 0x1801 # define TT_MS_LANGID_ARABIC_TUNISIA 0x1C01 # define TT_MS_LANGID_ARABIC_OMAN 0x2001 # define TT_MS_LANGID_ARABIC_YEMEN 0x2401 # define TT_MS_LANGID_ARABIC_SYRIA 0x2801 # define TT_MS_LANGID_ARABIC_JORDAN 0x2C01 # define TT_MS_LANGID_ARABIC_LEBANON 0x3001 # define TT_MS_LANGID_ARABIC_KUWAIT 0x3401 # define TT_MS_LANGID_ARABIC_UAE 0x3801 # define TT_MS_LANGID_ARABIC_BAHRAIN 0x3C01 # define TT_MS_LANGID_ARABIC_QATAR 0x4001 # define TT_MS_LANGID_BULGARIAN_BULGARIA 0x0402 # define TT_MS_LANGID_CATALAN_CATALAN 0x0403 # define TT_MS_LANGID_CHINESE_TAIWAN 0x0404 # define TT_MS_LANGID_CHINESE_PRC 0x0804 # define TT_MS_LANGID_CHINESE_HONG_KONG 0x0C04 # define TT_MS_LANGID_CHINESE_SINGAPORE 0x1004 # define TT_MS_LANGID_CHINESE_MACAO 0x1404 # define TT_MS_LANGID_CZECH_CZECH_REPUBLIC 0x0405 # define TT_MS_LANGID_DANISH_DENMARK 0x0406 # define TT_MS_LANGID_GERMAN_GERMANY 0x0407 # define TT_MS_LANGID_GERMAN_SWITZERLAND 0x0807 # define TT_MS_LANGID_GERMAN_AUSTRIA 0x0C07 # define TT_MS_LANGID_GERMAN_LUXEMBOURG 0x1007 # define TT_MS_LANGID_GERMAN_LIECHTENSTEIN 0x1407 # define TT_MS_LANGID_GREEK_GREECE 0x0408 # define TT_MS_LANGID_ENGLISH_UNITED_STATES 0x0409 # define TT_MS_LANGID_ENGLISH_UNITED_KINGDOM 0x0809 # define TT_MS_LANGID_ENGLISH_AUSTRALIA 0x0C09 # define TT_MS_LANGID_ENGLISH_CANADA 0x1009 # define TT_MS_LANGID_ENGLISH_NEW_ZEALAND 0x1409 # define TT_MS_LANGID_ENGLISH_IRELAND 0x1809 # define TT_MS_LANGID_ENGLISH_SOUTH_AFRICA 0x1C09 # define TT_MS_LANGID_ENGLISH_JAMAICA 0x2009 # define TT_MS_LANGID_ENGLISH_CARIBBEAN 0x2409 # define TT_MS_LANGID_ENGLISH_BELIZE 0x2809 # define TT_MS_LANGID_ENGLISH_TRINIDAD 0x2C09 # define TT_MS_LANGID_ENGLISH_ZIMBABWE 0x3009 # define TT_MS_LANGID_ENGLISH_PHILIPPINES 0x3409 # define TT_MS_LANGID_ENGLISH_INDIA 0x4009 # define TT_MS_LANGID_ENGLISH_MALAYSIA 0x4409 # define TT_MS_LANGID_ENGLISH_SINGAPORE 0x4809 # define TT_MS_LANGID_SPANISH_SPAIN_TRADITIONAL_SORT 0x040A # define TT_MS_LANGID_SPANISH_MEXICO 0x080A # define TT_MS_LANGID_SPANISH_SPAIN_MODERN_SORT 0x0C0A # define TT_MS_LANGID_SPANISH_GUATEMALA 0x100A # define TT_MS_LANGID_SPANISH_COSTA_RICA 0x140A # define TT_MS_LANGID_SPANISH_PANAMA 0x180A # define TT_MS_LANGID_SPANISH_DOMINICAN_REPUBLIC 0x1C0A # define TT_MS_LANGID_SPANISH_VENEZUELA 0x200A # define TT_MS_LANGID_SPANISH_COLOMBIA 0x240A # define TT_MS_LANGID_SPANISH_PERU 0x280A # define TT_MS_LANGID_SPANISH_ARGENTINA 0x2C0A # define TT_MS_LANGID_SPANISH_ECUADOR 0x300A # define TT_MS_LANGID_SPANISH_CHILE 0x340A # define TT_MS_LANGID_SPANISH_URUGUAY 0x380A # define TT_MS_LANGID_SPANISH_PARAGUAY 0x3C0A # define TT_MS_LANGID_SPANISH_BOLIVIA 0x400A # define TT_MS_LANGID_SPANISH_EL_SALVADOR 0x440A # define TT_MS_LANGID_SPANISH_HONDURAS 0x480A # define TT_MS_LANGID_SPANISH_NICARAGUA 0x4C0A # define TT_MS_LANGID_SPANISH_PUERTO_RICO 0x500A # define TT_MS_LANGID_SPANISH_UNITED_STATES 0x540A # define TT_MS_LANGID_FINNISH_FINLAND 0x040B # define TT_MS_LANGID_FRENCH_FRANCE 0x040C # define TT_MS_LANGID_FRENCH_BELGIUM 0x080C # define TT_MS_LANGID_FRENCH_CANADA 0x0C0C # define TT_MS_LANGID_FRENCH_SWITZERLAND 0x100C # define TT_MS_LANGID_FRENCH_LUXEMBOURG 0x140C # define TT_MS_LANGID_FRENCH_MONACO 0x180C # define TT_MS_LANGID_HEBREW_ISRAEL 0x040D # define TT_MS_LANGID_HUNGARIAN_HUNGARY 0x040E # define TT_MS_LANGID_ICELANDIC_ICELAND 0x040F # define TT_MS_LANGID_ITALIAN_ITALY 0x0410 # define TT_MS_LANGID_ITALIAN_SWITZERLAND 0x0810 # define TT_MS_LANGID_JAPANESE_JAPAN 0x0411 # define TT_MS_LANGID_KOREAN_KOREA 0x0412 # define TT_MS_LANGID_DUTCH_NETHERLANDS 0x0413 # define TT_MS_LANGID_DUTCH_BELGIUM 0x0813 # define TT_MS_LANGID_NORWEGIAN_NORWAY_BOKMAL 0x0414 # define TT_MS_LANGID_NORWEGIAN_NORWAY_NYNORSK 0x0814 # define TT_MS_LANGID_POLISH_POLAND 0x0415 # define TT_MS_LANGID_PORTUGUESE_BRAZIL 0x0416 # define TT_MS_LANGID_PORTUGUESE_PORTUGAL 0x0816 # define TT_MS_LANGID_ROMANSH_SWITZERLAND 0x0417 # define TT_MS_LANGID_ROMANIAN_ROMANIA 0x0418 # define TT_MS_LANGID_RUSSIAN_RUSSIA 0x0419 # define TT_MS_LANGID_CROATIAN_CROATIA 0x041A # define TT_MS_LANGID_SERBIAN_SERBIA_LATIN 0x081A # define TT_MS_LANGID_SERBIAN_SERBIA_CYRILLIC 0x0C1A # define TT_MS_LANGID_CROATIAN_BOSNIA_HERZEGOVINA 0x101A # define TT_MS_LANGID_BOSNIAN_BOSNIA_HERZEGOVINA 0x141A # define TT_MS_LANGID_SERBIAN_BOSNIA_HERZ_LATIN 0x181A # define TT_MS_LANGID_SERBIAN_BOSNIA_HERZ_CYRILLIC 0x1C1A # define TT_MS_LANGID_BOSNIAN_BOSNIA_HERZ_CYRILLIC 0x201A # define TT_MS_LANGID_SLOVAK_SLOVAKIA 0x041B # define TT_MS_LANGID_ALBANIAN_ALBANIA 0x041C # define TT_MS_LANGID_SWEDISH_SWEDEN 0x041D # define TT_MS_LANGID_SWEDISH_FINLAND 0x081D # define TT_MS_LANGID_THAI_THAILAND 0x041E # define TT_MS_LANGID_TURKISH_TURKEY 0x041F # define TT_MS_LANGID_URDU_PAKISTAN 0x0420 # define TT_MS_LANGID_INDONESIAN_INDONESIA 0x0421 # define TT_MS_LANGID_UKRAINIAN_UKRAINE 0x0422 # define TT_MS_LANGID_BELARUSIAN_BELARUS 0x0423 # define TT_MS_LANGID_SLOVENIAN_SLOVENIA 0x0424 # define TT_MS_LANGID_ESTONIAN_ESTONIA 0x0425 # define TT_MS_LANGID_LATVIAN_LATVIA 0x0426 # define TT_MS_LANGID_LITHUANIAN_LITHUANIA 0x0427 # define TT_MS_LANGID_TAJIK_TAJIKISTAN 0x0428 # define TT_MS_LANGID_VIETNAMESE_VIET_NAM 0x042A # define TT_MS_LANGID_ARMENIAN_ARMENIA 0x042B # define TT_MS_LANGID_AZERI_AZERBAIJAN_LATIN 0x042C # define TT_MS_LANGID_AZERI_AZERBAIJAN_CYRILLIC 0x082C # define TT_MS_LANGID_BASQUE_BASQUE 0x042D # define TT_MS_LANGID_UPPER_SORBIAN_GERMANY 0x042E # define TT_MS_LANGID_LOWER_SORBIAN_GERMANY 0x082E # define TT_MS_LANGID_MACEDONIAN_MACEDONIA 0x042F # define TT_MS_LANGID_SETSWANA_SOUTH_AFRICA 0x0432 # define TT_MS_LANGID_ISIXHOSA_SOUTH_AFRICA 0x0434 # define TT_MS_LANGID_ISIZULU_SOUTH_AFRICA 0x0435 # define TT_MS_LANGID_AFRIKAANS_SOUTH_AFRICA 0x0436 # define TT_MS_LANGID_GEORGIAN_GEORGIA 0x0437 # define TT_MS_LANGID_FAEROESE_FAEROE_ISLANDS 0x0438 # define TT_MS_LANGID_HINDI_INDIA 0x0439 # define TT_MS_LANGID_MALTESE_MALTA 0x043A # define TT_MS_LANGID_SAMI_NORTHERN_NORWAY 0x043B # define TT_MS_LANGID_SAMI_NORTHERN_SWEDEN 0x083B # define TT_MS_LANGID_SAMI_NORTHERN_FINLAND 0x0C3B # define TT_MS_LANGID_SAMI_LULE_NORWAY 0x103B # define TT_MS_LANGID_SAMI_LULE_SWEDEN 0x143B # define TT_MS_LANGID_SAMI_SOUTHERN_NORWAY 0x183B # define TT_MS_LANGID_SAMI_SOUTHERN_SWEDEN 0x1C3B # define TT_MS_LANGID_SAMI_SKOLT_FINLAND 0x203B # define TT_MS_LANGID_SAMI_INARI_FINLAND 0x243B # define TT_MS_LANGID_IRISH_IRELAND 0x083C # define TT_MS_LANGID_MALAY_MALAYSIA 0x043E # define TT_MS_LANGID_MALAY_BRUNEI_DARUSSALAM 0x083E # define TT_MS_LANGID_KAZAKH_KAZAKHSTAN 0x043F # define TT_MS_LANGID_KYRGYZ_KYRGYZSTAN /* Cyrillic*/ 0x0440 # define TT_MS_LANGID_KISWAHILI_KENYA 0x0441 # define TT_MS_LANGID_TURKMEN_TURKMENISTAN 0x0442 # define TT_MS_LANGID_UZBEK_UZBEKISTAN_LATIN 0x0443 # define TT_MS_LANGID_UZBEK_UZBEKISTAN_CYRILLIC 0x0843 # define TT_MS_LANGID_TATAR_RUSSIA 0x0444 # define TT_MS_LANGID_BENGALI_INDIA 0x0445 # define TT_MS_LANGID_BENGALI_BANGLADESH 0x0845 # define TT_MS_LANGID_PUNJABI_INDIA 0x0446 # define TT_MS_LANGID_GUJARATI_INDIA 0x0447 # define TT_MS_LANGID_ODIA_INDIA 0x0448 # define TT_MS_LANGID_TAMIL_INDIA 0x0449 # define TT_MS_LANGID_TELUGU_INDIA 0x044A # define TT_MS_LANGID_KANNADA_INDIA 0x044B # define TT_MS_LANGID_MALAYALAM_INDIA 0x044C # define TT_MS_LANGID_ASSAMESE_INDIA 0x044D # define TT_MS_LANGID_MARATHI_INDIA 0x044E # define TT_MS_LANGID_SANSKRIT_INDIA 0x044F # define TT_MS_LANGID_MONGOLIAN_MONGOLIA /* Cyrillic */ 0x0450 # define TT_MS_LANGID_MONGOLIAN_PRC 0x0850 # define TT_MS_LANGID_TIBETAN_PRC 0x0451 # define TT_MS_LANGID_WELSH_UNITED_KINGDOM 0x0452 # define TT_MS_LANGID_KHMER_CAMBODIA 0x0453 # define TT_MS_LANGID_LAO_LAOS 0x0454 # define TT_MS_LANGID_GALICIAN_GALICIAN 0x0456 # define TT_MS_LANGID_KONKANI_INDIA 0x0457 # define TT_MS_LANGID_SYRIAC_SYRIA 0x045A # define TT_MS_LANGID_SINHALA_SRI_LANKA 0x045B # define TT_MS_LANGID_INUKTITUT_CANADA 0x045D # define TT_MS_LANGID_INUKTITUT_CANADA_LATIN 0x085D # define TT_MS_LANGID_AMHARIC_ETHIOPIA 0x045E # define TT_MS_LANGID_TAMAZIGHT_ALGERIA 0x085F # define TT_MS_LANGID_NEPALI_NEPAL 0x0461 # define TT_MS_LANGID_FRISIAN_NETHERLANDS 0x0462 # define TT_MS_LANGID_PASHTO_AFGHANISTAN 0x0463 # define TT_MS_LANGID_FILIPINO_PHILIPPINES 0x0464 # define TT_MS_LANGID_DHIVEHI_MALDIVES 0x0465 # define TT_MS_LANGID_HAUSA_NIGERIA 0x0468 # define TT_MS_LANGID_YORUBA_NIGERIA 0x046A # define TT_MS_LANGID_QUECHUA_BOLIVIA 0x046B # define TT_MS_LANGID_QUECHUA_ECUADOR 0x086B # define TT_MS_LANGID_QUECHUA_PERU 0x0C6B # define TT_MS_LANGID_SESOTHO_SA_LEBOA_SOUTH_AFRICA 0x046C # define TT_MS_LANGID_BASHKIR_RUSSIA 0x046D # define TT_MS_LANGID_LUXEMBOURGISH_LUXEMBOURG 0x046E # define TT_MS_LANGID_GREENLANDIC_GREENLAND 0x046F # define TT_MS_LANGID_IGBO_NIGERIA 0x0470 # define TT_MS_LANGID_YI_PRC 0x0478 # define TT_MS_LANGID_MAPUDUNGUN_CHILE 0x047A # define TT_MS_LANGID_MOHAWK_MOHAWK 0x047C # define TT_MS_LANGID_BRETON_FRANCE 0x047E # define TT_MS_LANGID_UIGHUR_PRC 0x0480 # define TT_MS_LANGID_MAORI_NEW_ZEALAND 0x0481 # define TT_MS_LANGID_OCCITAN_FRANCE 0x0482 # define TT_MS_LANGID_CORSICAN_FRANCE 0x0483 # define TT_MS_LANGID_ALSATIAN_FRANCE 0x0484 # define TT_MS_LANGID_YAKUT_RUSSIA 0x0485 # define TT_MS_LANGID_KICHE_GUATEMALA 0x0486 # define TT_MS_LANGID_KINYARWANDA_RWANDA 0x0487 # define TT_MS_LANGID_WOLOF_SENEGAL 0x0488 # define TT_MS_LANGID_DARI_AFGHANISTAN 0x048C Possible values of the language identifier field in the name records of the SFNT name table if the platform identifier code is TT_PLATFORM_MICROSOFT . These values are also used as return values for function FT_Get_CMap_Language_ID . The canonical source for Microsoft's IDs is https://docs.microsoft.com/en-us/windows/desktop/Intl/language-identifier-constants-and-strings , however, we only provide macros for language identifiers present in the OpenType specification: Microsoft has abandoned the concept of LCIDs (language code identifiers), and format 1 of the name table provides a better mechanism for languages not covered here. More legacy values not listed in the reference can be found in the FT_TRUETYPE_IDS_H header file.","title":"TT_MS_LANGID_XXX"},{"location":"ft2-truetype_tables.html#tt_name_id_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). # define TT_NAME_ID_COPYRIGHT 0 # define TT_NAME_ID_FONT_FAMILY 1 # define TT_NAME_ID_FONT_SUBFAMILY 2 # define TT_NAME_ID_UNIQUE_ID 3 # define TT_NAME_ID_FULL_NAME 4 # define TT_NAME_ID_VERSION_STRING 5 # define TT_NAME_ID_PS_NAME 6 # define TT_NAME_ID_TRADEMARK 7 /* the following values are from the OpenType spec */ # define TT_NAME_ID_MANUFACTURER 8 # define TT_NAME_ID_DESIGNER 9 # define TT_NAME_ID_DESCRIPTION 10 # define TT_NAME_ID_VENDOR_URL 11 # define TT_NAME_ID_DESIGNER_URL 12 # define TT_NAME_ID_LICENSE 13 # define TT_NAME_ID_LICENSE_URL 14 /* number 15 is reserved */ # define TT_NAME_ID_TYPOGRAPHIC_FAMILY 16 # define TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY 17 # define TT_NAME_ID_MAC_FULL_NAME 18 /* The following code is new as of 2000-01-21 */ # define TT_NAME_ID_SAMPLE_TEXT 19 /* This is new in OpenType 1.3 */ # define TT_NAME_ID_CID_FINDFONT_NAME 20 /* This is new in OpenType 1.5 */ # define TT_NAME_ID_WWS_FAMILY 21 # define TT_NAME_ID_WWS_SUBFAMILY 22 /* This is new in OpenType 1.7 */ # define TT_NAME_ID_LIGHT_BACKGROUND 23 # define TT_NAME_ID_DARK_BACKGROUND 24 /* This is new in OpenType 1.8 */ # define TT_NAME_ID_VARIATIONS_PREFIX 25 /* these two values are deprecated */ # define TT_NAME_ID_PREFERRED_FAMILY TT_NAME_ID_TYPOGRAPHIC_FAMILY # define TT_NAME_ID_PREFERRED_SUBFAMILY TT_NAME_ID_TYPOGRAPHIC_SUBFAMILY Possible values of the name identifier field in the name records of an SFNT name table. These values are platform independent.","title":"TT_NAME_ID_XXX"},{"location":"ft2-truetype_tables.html#tt_ucr_xxx","text":"Defined in FT_TRUETYPE_IDS_H (freetype/ttnameid.h). /* ulUnicodeRange1 */ /* --------------- */ /* Bit 0 Basic Latin */ # define TT_UCR_BASIC_LATIN (1L 0) /* U+0020-U+007E */ /* Bit 1 C1 Controls and Latin-1 Supplement */ # define TT_UCR_LATIN1_SUPPLEMENT (1L 1) /* U+0080-U+00FF */ /* Bit 2 Latin Extended-A */ # define TT_UCR_LATIN_EXTENDED_A (1L 2) /* U+0100-U+017F */ /* Bit 3 Latin Extended-B */ # define TT_UCR_LATIN_EXTENDED_B (1L 3) /* U+0180-U+024F */ /* Bit 4 IPA Extensions */ /* Phonetic Extensions */ /* Phonetic Extensions Supplement */ # define TT_UCR_IPA_EXTENSIONS (1L 4) /* U+0250-U+02AF */ /* U+1D00-U+1D7F */ /* U+1D80-U+1DBF */ /* Bit 5 Spacing Modifier Letters */ /* Modifier Tone Letters */ # define TT_UCR_SPACING_MODIFIER (1L 5) /* U+02B0-U+02FF */ /* U+A700-U+A71F */ /* Bit 6 Combining Diacritical Marks */ /* Combining Diacritical Marks Supplement */ # define TT_UCR_COMBINING_DIACRITICAL_MARKS (1L 6) /* U+0300-U+036F */ /* U+1DC0-U+1DFF */ /* Bit 7 Greek and Coptic */ # define TT_UCR_GREEK (1L 7) /* U+0370-U+03FF */ /* Bit 8 Coptic */ # define TT_UCR_COPTIC (1L 8) /* U+2C80-U+2CFF */ /* Bit 9 Cyrillic */ /* Cyrillic Supplement */ /* Cyrillic Extended-A */ /* Cyrillic Extended-B */ # define TT_UCR_CYRILLIC (1L 9) /* U+0400-U+04FF */ /* U+0500-U+052F */ /* U+2DE0-U+2DFF */ /* U+A640-U+A69F */ /* Bit 10 Armenian */ # define TT_UCR_ARMENIAN (1L 10) /* U+0530-U+058F */ /* Bit 11 Hebrew */ # define TT_UCR_HEBREW (1L 11) /* U+0590-U+05FF */ /* Bit 12 Vai */ # define TT_UCR_VAI (1L 12) /* U+A500-U+A63F */ /* Bit 13 Arabic */ /* Arabic Supplement */ # define TT_UCR_ARABIC (1L 13) /* U+0600-U+06FF */ /* U+0750-U+077F */ /* Bit 14 NKo */ # define TT_UCR_NKO (1L 14) /* U+07C0-U+07FF */ /* Bit 15 Devanagari */ # define TT_UCR_DEVANAGARI (1L 15) /* U+0900-U+097F */ /* Bit 16 Bengali */ # define TT_UCR_BENGALI (1L 16) /* U+0980-U+09FF */ /* Bit 17 Gurmukhi */ # define TT_UCR_GURMUKHI (1L 17) /* U+0A00-U+0A7F */ /* Bit 18 Gujarati */ # define TT_UCR_GUJARATI (1L 18) /* U+0A80-U+0AFF */ /* Bit 19 Oriya */ # define TT_UCR_ORIYA (1L 19) /* U+0B00-U+0B7F */ /* Bit 20 Tamil */ # define TT_UCR_TAMIL (1L 20) /* U+0B80-U+0BFF */ /* Bit 21 Telugu */ # define TT_UCR_TELUGU (1L 21) /* U+0C00-U+0C7F */ /* Bit 22 Kannada */ # define TT_UCR_KANNADA (1L 22) /* U+0C80-U+0CFF */ /* Bit 23 Malayalam */ # define TT_UCR_MALAYALAM (1L 23) /* U+0D00-U+0D7F */ /* Bit 24 Thai */ # define TT_UCR_THAI (1L 24) /* U+0E00-U+0E7F */ /* Bit 25 Lao */ # define TT_UCR_LAO (1L 25) /* U+0E80-U+0EFF */ /* Bit 26 Georgian */ /* Georgian Supplement */ # define TT_UCR_GEORGIAN (1L 26) /* U+10A0-U+10FF */ /* U+2D00-U+2D2F */ /* Bit 27 Balinese */ # define TT_UCR_BALINESE (1L 27) /* U+1B00-U+1B7F */ /* Bit 28 Hangul Jamo */ # define TT_UCR_HANGUL_JAMO (1L 28) /* U+1100-U+11FF */ /* Bit 29 Latin Extended Additional */ /* Latin Extended-C */ /* Latin Extended-D */ # define TT_UCR_LATIN_EXTENDED_ADDITIONAL (1L 29) /* U+1E00-U+1EFF */ /* U+2C60-U+2C7F */ /* U+A720-U+A7FF */ /* Bit 30 Greek Extended */ # define TT_UCR_GREEK_EXTENDED (1L 30) /* U+1F00-U+1FFF */ /* Bit 31 General Punctuation */ /* Supplemental Punctuation */ # define TT_UCR_GENERAL_PUNCTUATION (1L 31) /* U+2000-U+206F */ /* U+2E00-U+2E7F */ /* ulUnicodeRange2 */ /* --------------- */ /* Bit 32 Superscripts And Subscripts */ # define TT_UCR_SUPERSCRIPTS_SUBSCRIPTS (1L 0) /* U+2070-U+209F */ /* Bit 33 Currency Symbols */ # define TT_UCR_CURRENCY_SYMBOLS (1L 1) /* U+20A0-U+20CF */ /* Bit 34 Combining Diacritical Marks For Symbols */ # define TT_UCR_COMBINING_DIACRITICAL_MARKS_SYMB \\ (1L 2) /* U+20D0-U+20FF */ /* Bit 35 Letterlike Symbols */ # define TT_UCR_LETTERLIKE_SYMBOLS (1L 3) /* U+2100-U+214F */ /* Bit 36 Number Forms */ # define TT_UCR_NUMBER_FORMS (1L 4) /* U+2150-U+218F */ /* Bit 37 Arrows */ /* Supplemental Arrows-A */ /* Supplemental Arrows-B */ /* Miscellaneous Symbols and Arrows */ # define TT_UCR_ARROWS (1L 5) /* U+2190-U+21FF */ /* U+27F0-U+27FF */ /* U+2900-U+297F */ /* U+2B00-U+2BFF */ /* Bit 38 Mathematical Operators */ /* Supplemental Mathematical Operators */ /* Miscellaneous Mathematical Symbols-A */ /* Miscellaneous Mathematical Symbols-B */ # define TT_UCR_MATHEMATICAL_OPERATORS (1L 6) /* U+2200-U+22FF */ /* U+2A00-U+2AFF */ /* U+27C0-U+27EF */ /* U+2980-U+29FF */ /* Bit 39 Miscellaneous Technical */ # define TT_UCR_MISCELLANEOUS_TECHNICAL (1L 7) /* U+2300-U+23FF */ /* Bit 40 Control Pictures */ # define TT_UCR_CONTROL_PICTURES (1L 8) /* U+2400-U+243F */ /* Bit 41 Optical Character Recognition */ # define TT_UCR_OCR (1L 9) /* U+2440-U+245F */ /* Bit 42 Enclosed Alphanumerics */ # define TT_UCR_ENCLOSED_ALPHANUMERICS (1L 10) /* U+2460-U+24FF */ /* Bit 43 Box Drawing */ # define TT_UCR_BOX_DRAWING (1L 11) /* U+2500-U+257F */ /* Bit 44 Block Elements */ # define TT_UCR_BLOCK_ELEMENTS (1L 12) /* U+2580-U+259F */ /* Bit 45 Geometric Shapes */ # define TT_UCR_GEOMETRIC_SHAPES (1L 13) /* U+25A0-U+25FF */ /* Bit 46 Miscellaneous Symbols */ # define TT_UCR_MISCELLANEOUS_SYMBOLS (1L 14) /* U+2600-U+26FF */ /* Bit 47 Dingbats */ # define TT_UCR_DINGBATS (1L 15) /* U+2700-U+27BF */ /* Bit 48 CJK Symbols and Punctuation */ # define TT_UCR_CJK_SYMBOLS (1L 16) /* U+3000-U+303F */ /* Bit 49 Hiragana */ # define TT_UCR_HIRAGANA (1L 17) /* U+3040-U+309F */ /* Bit 50 Katakana */ /* Katakana Phonetic Extensions */ # define TT_UCR_KATAKANA (1L 18) /* U+30A0-U+30FF */ /* U+31F0-U+31FF */ /* Bit 51 Bopomofo */ /* Bopomofo Extended */ # define TT_UCR_BOPOMOFO (1L 19) /* U+3100-U+312F */ /* U+31A0-U+31BF */ /* Bit 52 Hangul Compatibility Jamo */ # define TT_UCR_HANGUL_COMPATIBILITY_JAMO (1L 20) /* U+3130-U+318F */ /* Bit 53 Phags-Pa */ # define TT_UCR_CJK_MISC (1L 21) /* U+A840-U+A87F */ # define TT_UCR_KANBUN TT_UCR_CJK_MISC /* deprecated */ # define TT_UCR_PHAGSPA /* Bit 54 Enclosed CJK Letters and Months */ # define TT_UCR_ENCLOSED_CJK_LETTERS_MONTHS (1L 22) /* U+3200-U+32FF */ /* Bit 55 CJK Compatibility */ # define TT_UCR_CJK_COMPATIBILITY (1L 23) /* U+3300-U+33FF */ /* Bit 56 Hangul Syllables */ # define TT_UCR_HANGUL (1L 24) /* U+AC00-U+D7A3 */ /* Bit 57 High Surrogates */ /* High Private Use Surrogates */ /* Low Surrogates */ /* According to OpenType specs v.1.3+, */ /* setting bit 57 implies that there is */ /* at least one codepoint beyond the */ /* Basic Multilingual Plane that is */ /* supported by this font. So it really */ /* means = U+10000. */ # define TT_UCR_SURROGATES (1L 25) /* U+D800-U+DB7F */ /* U+DB80-U+DBFF */ /* U+DC00-U+DFFF */ # define TT_UCR_NON_PLANE_0 TT_UCR_SURROGATES /* Bit 58 Phoenician */ # define TT_UCR_PHOENICIAN (1L 26) /*U+10900-U+1091F*/ /* Bit 59 CJK Unified Ideographs */ /* CJK Radicals Supplement */ /* Kangxi Radicals */ /* Ideographic Description Characters */ /* CJK Unified Ideographs Extension A */ /* CJK Unified Ideographs Extension B */ /* Kanbun */ # define TT_UCR_CJK_UNIFIED_IDEOGRAPHS (1L 27) /* U+4E00-U+9FFF */ /* U+2E80-U+2EFF */ /* U+2F00-U+2FDF */ /* U+2FF0-U+2FFF */ /* U+3400-U+4DB5 */ /*U+20000-U+2A6DF*/ /* U+3190-U+319F */ /* Bit 60 Private Use */ # define TT_UCR_PRIVATE_USE (1L 28) /* U+E000-U+F8FF */ /* Bit 61 CJK Strokes */ /* CJK Compatibility Ideographs */ /* CJK Compatibility Ideographs Supplement */ # define TT_UCR_CJK_COMPATIBILITY_IDEOGRAPHS (1L 29) /* U+31C0-U+31EF */ /* U+F900-U+FAFF */ /*U+2F800-U+2FA1F*/ /* Bit 62 Alphabetic Presentation Forms */ # define TT_UCR_ALPHABETIC_PRESENTATION_FORMS (1L 30) /* U+FB00-U+FB4F */ /* Bit 63 Arabic Presentation Forms-A */ # define TT_UCR_ARABIC_PRESENTATION_FORMS_A (1L 31) /* U+FB50-U+FDFF */ /* ulUnicodeRange3 */ /* --------------- */ /* Bit 64 Combining Half Marks */ # define TT_UCR_COMBINING_HALF_MARKS (1L 0) /* U+FE20-U+FE2F */ /* Bit 65 Vertical forms */ /* CJK Compatibility Forms */ # define TT_UCR_CJK_COMPATIBILITY_FORMS (1L 1) /* U+FE10-U+FE1F */ /* U+FE30-U+FE4F */ /* Bit 66 Small Form Variants */ # define TT_UCR_SMALL_FORM_VARIANTS (1L 2) /* U+FE50-U+FE6F */ /* Bit 67 Arabic Presentation Forms-B */ # define TT_UCR_ARABIC_PRESENTATION_FORMS_B (1L 3) /* U+FE70-U+FEFE */ /* Bit 68 Halfwidth and Fullwidth Forms */ # define TT_UCR_HALFWIDTH_FULLWIDTH_FORMS (1L 4) /* U+FF00-U+FFEF */ /* Bit 69 Specials */ # define TT_UCR_SPECIALS (1L 5) /* U+FFF0-U+FFFD */ /* Bit 70 Tibetan */ # define TT_UCR_TIBETAN (1L 6) /* U+0F00-U+0FFF */ /* Bit 71 Syriac */ # define TT_UCR_SYRIAC (1L 7) /* U+0700-U+074F */ /* Bit 72 Thaana */ # define TT_UCR_THAANA (1L 8) /* U+0780-U+07BF */ /* Bit 73 Sinhala */ # define TT_UCR_SINHALA (1L 9) /* U+0D80-U+0DFF */ /* Bit 74 Myanmar */ # define TT_UCR_MYANMAR (1L 10) /* U+1000-U+109F */ /* Bit 75 Ethiopic */ /* Ethiopic Supplement */ /* Ethiopic Extended */ # define TT_UCR_ETHIOPIC (1L 11) /* U+1200-U+137F */ /* U+1380-U+139F */ /* U+2D80-U+2DDF */ /* Bit 76 Cherokee */ # define TT_UCR_CHEROKEE (1L 12) /* U+13A0-U+13FF */ /* Bit 77 Unified Canadian Aboriginal Syllabics */ # define TT_UCR_CANADIAN_ABORIGINAL_SYLLABICS (1L 13) /* U+1400-U+167F */ /* Bit 78 Ogham */ # define TT_UCR_OGHAM (1L 14) /* U+1680-U+169F */ /* Bit 79 Runic */ # define TT_UCR_RUNIC (1L 15) /* U+16A0-U+16FF */ /* Bit 80 Khmer */ /* Khmer Symbols */ # define TT_UCR_KHMER (1L 16) /* U+1780-U+17FF */ /* U+19E0-U+19FF */ /* Bit 81 Mongolian */ # define TT_UCR_MONGOLIAN (1L 17) /* U+1800-U+18AF */ /* Bit 82 Braille Patterns */ # define TT_UCR_BRAILLE (1L 18) /* U+2800-U+28FF */ /* Bit 83 Yi Syllables */ /* Yi Radicals */ # define TT_UCR_YI (1L 19) /* U+A000-U+A48F */ /* U+A490-U+A4CF */ /* Bit 84 Tagalog */ /* Hanunoo */ /* Buhid */ /* Tagbanwa */ # define TT_UCR_PHILIPPINE (1L 20) /* U+1700-U+171F */ /* U+1720-U+173F */ /* U+1740-U+175F */ /* U+1760-U+177F */ /* Bit 85 Old Italic */ # define TT_UCR_OLD_ITALIC (1L 21) /*U+10300-U+1032F*/ /* Bit 86 Gothic */ # define TT_UCR_GOTHIC (1L 22) /*U+10330-U+1034F*/ /* Bit 87 Deseret */ # define TT_UCR_DESERET (1L 23) /*U+10400-U+1044F*/ /* Bit 88 Byzantine Musical Symbols */ /* Musical Symbols */ /* Ancient Greek Musical Notation */ # define TT_UCR_MUSICAL_SYMBOLS (1L 24) /*U+1D000-U+1D0FF*/ /*U+1D100-U+1D1FF*/ /*U+1D200-U+1D24F*/ /* Bit 89 Mathematical Alphanumeric Symbols */ # define TT_UCR_MATH_ALPHANUMERIC_SYMBOLS (1L 25) /*U+1D400-U+1D7FF*/ /* Bit 90 Private Use (plane 15) */ /* Private Use (plane 16) */ # define TT_UCR_PRIVATE_USE_SUPPLEMENTARY (1L 26) /*U+F0000-U+FFFFD*/ /*U+100000-U+10FFFD*/ /* Bit 91 Variation Selectors */ /* Variation Selectors Supplement */ # define TT_UCR_VARIATION_SELECTORS (1L 27) /* U+FE00-U+FE0F */ /*U+E0100-U+E01EF*/ /* Bit 92 Tags */ # define TT_UCR_TAGS (1L 28) /*U+E0000-U+E007F*/ /* Bit 93 Limbu */ # define TT_UCR_LIMBU (1L 29) /* U+1900-U+194F */ /* Bit 94 Tai Le */ # define TT_UCR_TAI_LE (1L 30) /* U+1950-U+197F */ /* Bit 95 New Tai Lue */ # define TT_UCR_NEW_TAI_LUE (1L 31) /* U+1980-U+19DF */ /* ulUnicodeRange4 */ /* --------------- */ /* Bit 96 Buginese */ # define TT_UCR_BUGINESE (1L 0) /* U+1A00-U+1A1F */ /* Bit 97 Glagolitic */ # define TT_UCR_GLAGOLITIC (1L 1) /* U+2C00-U+2C5F */ /* Bit 98 Tifinagh */ # define TT_UCR_TIFINAGH (1L 2) /* U+2D30-U+2D7F */ /* Bit 99 Yijing Hexagram Symbols */ # define TT_UCR_YIJING (1L 3) /* U+4DC0-U+4DFF */ /* Bit 100 Syloti Nagri */ # define TT_UCR_SYLOTI_NAGRI (1L 4) /* U+A800-U+A82F */ /* Bit 101 Linear B Syllabary */ /* Linear B Ideograms */ /* Aegean Numbers */ # define TT_UCR_LINEAR_B (1L 5) /*U+10000-U+1007F*/ /*U+10080-U+100FF*/ /*U+10100-U+1013F*/ /* Bit 102 Ancient Greek Numbers */ # define TT_UCR_ANCIENT_GREEK_NUMBERS (1L 6) /*U+10140-U+1018F*/ /* Bit 103 Ugaritic */ # define TT_UCR_UGARITIC (1L 7) /*U+10380-U+1039F*/ /* Bit 104 Old Persian */ # define TT_UCR_OLD_PERSIAN (1L 8) /*U+103A0-U+103DF*/ /* Bit 105 Shavian */ # define TT_UCR_SHAVIAN (1L 9) /*U+10450-U+1047F*/ /* Bit 106 Osmanya */ # define TT_UCR_OSMANYA (1L 10) /*U+10480-U+104AF*/ /* Bit 107 Cypriot Syllabary */ # define TT_UCR_CYPRIOT_SYLLABARY (1L 11) /*U+10800-U+1083F*/ /* Bit 108 Kharoshthi */ # define TT_UCR_KHAROSHTHI (1L 12) /*U+10A00-U+10A5F*/ /* Bit 109 Tai Xuan Jing Symbols */ # define TT_UCR_TAI_XUAN_JING (1L 13) /*U+1D300-U+1D35F*/ /* Bit 110 Cuneiform */ /* Cuneiform Numbers and Punctuation */ # define TT_UCR_CUNEIFORM (1L 14) /*U+12000-U+123FF*/ /*U+12400-U+1247F*/ /* Bit 111 Counting Rod Numerals */ # define TT_UCR_COUNTING_ROD_NUMERALS (1L 15) /*U+1D360-U+1D37F*/ /* Bit 112 Sundanese */ # define TT_UCR_SUNDANESE (1L 16) /* U+1B80-U+1BBF */ /* Bit 113 Lepcha */ # define TT_UCR_LEPCHA (1L 17) /* U+1C00-U+1C4F */ /* Bit 114 Ol Chiki */ # define TT_UCR_OL_CHIKI (1L 18) /* U+1C50-U+1C7F */ /* Bit 115 Saurashtra */ # define TT_UCR_SAURASHTRA (1L 19) /* U+A880-U+A8DF */ /* Bit 116 Kayah Li */ # define TT_UCR_KAYAH_LI (1L 20) /* U+A900-U+A92F */ /* Bit 117 Rejang */ # define TT_UCR_REJANG (1L 21) /* U+A930-U+A95F */ /* Bit 118 Cham */ # define TT_UCR_CHAM (1L 22) /* U+AA00-U+AA5F */ /* Bit 119 Ancient Symbols */ # define TT_UCR_ANCIENT_SYMBOLS (1L 23) /*U+10190-U+101CF*/ /* Bit 120 Phaistos Disc */ # define TT_UCR_PHAISTOS_DISC (1L 24) /*U+101D0-U+101FF*/ /* Bit 121 Carian */ /* Lycian */ /* Lydian */ # define TT_UCR_OLD_ANATOLIAN (1L 25) /*U+102A0-U+102DF*/ /*U+10280-U+1029F*/ /*U+10920-U+1093F*/ /* Bit 122 Domino Tiles */ /* Mahjong Tiles */ # define TT_UCR_GAME_TILES (1L 26) /*U+1F030-U+1F09F*/ /*U+1F000-U+1F02F*/ /* Bit 123-127 Reserved for process-internal usage */ Possible bit mask values for the ulUnicodeRangeX fields in an SFNT OS/2 table.","title":"TT_UCR_XXX"},{"location":"ft2-tt_driver.html","text":"FreeType Docs Controlling FreeType Modules The TrueType driver The TrueType driver Synopsis While FreeType's TrueType driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get . The following lists the available properties together with the necessary macros and structures. The TrueType driver's module name is truetype . A single property interpreter-version is available, as documented in the Driver properties section. We start with a list of definitions, kindly provided by Greg Hitchcock. Bi-Level Rendering Monochromatic rendering, exclusively used in the early days of TrueType by both Apple and Microsoft. Microsoft's GDI interface supported hinting of the right-side bearing point, such that the advance width could be non-linear. Most often this was done to achieve some level of glyph symmetry. To enable reasonable performance (e.g., not having to run hinting on all glyphs just to get the widths) there was a bit in the head table indicating if the side bearing was hinted, and additional tables, hdmx and LTSH , to cache hinting widths across multiple sizes and device aspect ratios. Font Smoothing Microsoft's GDI implementation of anti-aliasing. Not traditional anti-aliasing as the outlines were hinted before the sampling. The widths matched the bi-level rendering. ClearType Rendering Technique that uses physical subpixels to improve rendering on LCD (and other) displays. Because of the higher resolution, many methods of improving symmetry in glyphs through hinting the right-side bearing were no longer necessary. This lead to what GDI calls natural widths ClearType, see http://rastertragedy.com/RTRCh4.htm#Sec21 . Since hinting has extra resolution, most non-linearity went away, but it is still possible for hints to change the advance widths in this mode. ClearType Compatible Widths One of the earliest challenges with ClearType was allowing the implementation in GDI to be selected without requiring all UI and documents to reflow. To address this, a compatible method of rendering ClearType was added where the font hints are executed once to determine the width in bi-level rendering, and then re-run in ClearType, with the difference in widths being absorbed in the font hints for ClearType (mostly in the white space of hints); see http://rastertragedy.com/RTRCh4.htm#Sec20 . Somewhat by definition, compatible width ClearType allows for non-linear widths, but only when the bi-level version has non-linear widths. ClearType Subpixel Positioning One of the nice benefits of ClearType is the ability to more crisply display fractional widths; unfortunately, the GDI model of integer bitmaps did not support this. However, the WPF and Direct Write frameworks do support fractional widths. DWrite calls this natural mode , not to be confused with GDI's natural widths . Subpixel positioning, in the current implementation of Direct Write, unfortunately does not support hinted advance widths, see http://rastertragedy.com/RTRCh4.htm#Sec22 . Note that the TrueType interpreter fully allows the advance width to be adjusted in this mode, just the DWrite client will ignore those changes. ClearType Backward Compatibility This is a set of exceptions made in the TrueType interpreter to minimize hinting techniques that were problematic with the extra resolution of ClearType; see http://rastertragedy.com/RTRCh4.htm#Sec1 and https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx . This technique is not to be confused with ClearType compatible widths. ClearType backward compatibility has no direct impact on changing advance widths, but there might be an indirect impact on disabling some deltas. This could be worked around in backward compatibility mode. Native ClearType Mode (Not to be confused with natural widths .) This mode removes all the exceptions in the TrueType interpreter when running with ClearType. Any issues on widths would still apply, though.","title":"The TrueType driver"},{"location":"ft2-tt_driver.html#the-truetype-driver","text":"","title":"The TrueType driver"},{"location":"ft2-tt_driver.html#synopsis","text":"While FreeType's TrueType driver doesn't expose API functions by itself, it is possible to control its behaviour with FT_Property_Set and FT_Property_Get . The following lists the available properties together with the necessary macros and structures. The TrueType driver's module name is truetype . A single property interpreter-version is available, as documented in the Driver properties section. We start with a list of definitions, kindly provided by Greg Hitchcock. Bi-Level Rendering Monochromatic rendering, exclusively used in the early days of TrueType by both Apple and Microsoft. Microsoft's GDI interface supported hinting of the right-side bearing point, such that the advance width could be non-linear. Most often this was done to achieve some level of glyph symmetry. To enable reasonable performance (e.g., not having to run hinting on all glyphs just to get the widths) there was a bit in the head table indicating if the side bearing was hinted, and additional tables, hdmx and LTSH , to cache hinting widths across multiple sizes and device aspect ratios. Font Smoothing Microsoft's GDI implementation of anti-aliasing. Not traditional anti-aliasing as the outlines were hinted before the sampling. The widths matched the bi-level rendering. ClearType Rendering Technique that uses physical subpixels to improve rendering on LCD (and other) displays. Because of the higher resolution, many methods of improving symmetry in glyphs through hinting the right-side bearing were no longer necessary. This lead to what GDI calls natural widths ClearType, see http://rastertragedy.com/RTRCh4.htm#Sec21 . Since hinting has extra resolution, most non-linearity went away, but it is still possible for hints to change the advance widths in this mode. ClearType Compatible Widths One of the earliest challenges with ClearType was allowing the implementation in GDI to be selected without requiring all UI and documents to reflow. To address this, a compatible method of rendering ClearType was added where the font hints are executed once to determine the width in bi-level rendering, and then re-run in ClearType, with the difference in widths being absorbed in the font hints for ClearType (mostly in the white space of hints); see http://rastertragedy.com/RTRCh4.htm#Sec20 . Somewhat by definition, compatible width ClearType allows for non-linear widths, but only when the bi-level version has non-linear widths. ClearType Subpixel Positioning One of the nice benefits of ClearType is the ability to more crisply display fractional widths; unfortunately, the GDI model of integer bitmaps did not support this. However, the WPF and Direct Write frameworks do support fractional widths. DWrite calls this natural mode , not to be confused with GDI's natural widths . Subpixel positioning, in the current implementation of Direct Write, unfortunately does not support hinted advance widths, see http://rastertragedy.com/RTRCh4.htm#Sec22 . Note that the TrueType interpreter fully allows the advance width to be adjusted in this mode, just the DWrite client will ignore those changes. ClearType Backward Compatibility This is a set of exceptions made in the TrueType interpreter to minimize hinting techniques that were problematic with the extra resolution of ClearType; see http://rastertragedy.com/RTRCh4.htm#Sec1 and https://www.microsoft.com/typography/cleartype/truetypecleartype.aspx . This technique is not to be confused with ClearType compatible widths. ClearType backward compatibility has no direct impact on changing advance widths, but there might be an indirect impact on disabling some deltas. This could be worked around in backward compatibility mode. Native ClearType Mode (Not to be confused with natural widths .) This mode removes all the exceptions in the TrueType interpreter when running with ClearType. Any issues on widths would still apply, though.","title":"Synopsis"},{"location":"ft2-type1_tables.html","text":"FreeType Docs Format-Specific API Type 1 Tables Type 1 Tables Synopsis This section contains the definition of Type 1-specific tables, including structures related to other PostScript font formats. PS_FontInfoRec Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_FontInfoRec_ { FT_String * version; FT_String * notice; FT_String * full_name; FT_String * family_name; FT_String * weight; FT_Long italic_angle; FT_Bool is_fixed_pitch; FT_Short underline_position; FT_UShort underline_thickness; } PS_FontInfoRec ; A structure used to model a Type 1 or Type 2 FontInfo dictionary. Note that for Multiple Master fonts, each instance has its own FontInfo dictionary. PS_FontInfo Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_FontInfoRec_* PS_FontInfo ; A handle to a PS_FontInfoRec structure. PS_PrivateRec Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_PrivateRec_ { FT_Int unique_id; FT_Int lenIV; FT_Byte num_blue_values; FT_Byte num_other_blues; FT_Byte num_family_blues; FT_Byte num_family_other_blues; FT_Short blue_values[14]; FT_Short other_blues[10]; FT_Short family_blues [14]; FT_Short family_other_blues[10]; FT_Fixed blue_scale; FT_Int blue_shift; FT_Int blue_fuzz; FT_UShort standard_width[1]; FT_UShort standard_height[1]; FT_Byte num_snap_widths; FT_Byte num_snap_heights; FT_Bool force_bold; FT_Bool round_stem_up; FT_Short snap_widths [13]; /* including std width */ FT_Short snap_heights[13]; /* including std height */ FT_Fixed expansion_factor; FT_Long language_group; FT_Long password; FT_Short min_feature[2]; } PS_PrivateRec ; A structure used to model a Type 1 or Type 2 private dictionary. Note that for Multiple Master fonts, each instance has its own Private dictionary. PS_Private Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_PrivateRec_* PS_Private ; A handle to a PS_PrivateRec structure. CID_FaceDictRec Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceDictRec_ { PS_PrivateRec private_dict; FT_UInt len_buildchar; FT_Fixed forcebold_threshold; FT_Pos stroke_width; FT_Fixed expansion_factor; /* this is a duplicate of */ /* `private_dict- expansion_factor' */ FT_Byte paint_type; FT_Byte font_type; FT_Matrix font_matrix; FT_Vector font_offset; FT_UInt num_subrs; FT_ULong subrmap_offset; FT_Int sd_bytes; } CID_FaceDictRec ; A structure used to represent data in a CID top-level dictionary. In most cases, they are part of the font's /FDArray array. Within a CID font file, such (internal) subfont dictionaries are enclosed by %ADOBeginFontDict and %ADOEndFontDict comments. Note that CID_FaceDictRec misses a field for the /FontName keyword, specifying the subfont's name (the top-level font name is given by the /CIDFontName keyword). This is an oversight, but it doesn't limit the cid font module's functionality because FreeType neither needs this entry nor gives access to CID subfonts. CID_FaceDict Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceDictRec_* CID_FaceDict ; A handle to a CID_FaceDictRec structure. CID_FaceInfoRec Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceInfoRec_ { FT_String * cid_font_name; FT_Fixed cid_version; FT_Int cid_font_type; FT_String * registry; FT_String * ordering; FT_Int supplement; PS_FontInfoRec font_info; FT_BBox font_bbox; FT_ULong uid_base; FT_Int num_xuid; FT_ULong xuid[16]; FT_ULong cidmap_offset; FT_Int fd_bytes; FT_Int gd_bytes; FT_ULong cid_count; FT_Int num_dicts; CID_FaceDict font_dicts; FT_ULong data_offset; } CID_FaceInfoRec ; A structure used to represent CID Face information. CID_FaceInfo Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceInfoRec_* CID_FaceInfo ; A handle to a CID_FaceInfoRec structure. FT_Has_PS_Glyph_Names Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Int ) FT_Has_PS_Glyph_Names ( FT_Face face ); Return true if a given face provides reliable PostScript glyph names. This is similar to using the FT_HAS_GLYPH_NAMES macro, except that certain fonts (mostly TrueType) contain incorrect glyph name tables. When this function returns true, the caller is sure that the glyph names returned by FT_Get_Glyph_Name are reliable. input face face handle return Boolean. True if glyph names are reliable. FT_Get_PS_Font_Info Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Error ) FT_Get_PS_Font_Info ( FT_Face face, PS_FontInfo afont_info ); Retrieve the PS_FontInfoRec structure corresponding to a given PostScript font. input face PostScript face handle. output afont_info Output font info structure pointer. return FreeType error code. 0 means success. note String pointers within the PS_FontInfoRec structure are owned by the face and don't need to be freed by the caller. Missing entries in the font's FontInfo dictionary are represented by NULL pointers. If the font's format is not PostScript-based, this function will return the FT_Err_Invalid_Argument error code. FT_Get_PS_Font_Private Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Error ) FT_Get_PS_Font_Private ( FT_Face face, PS_Private afont_private ); Retrieve the PS_PrivateRec structure corresponding to a given PostScript font. input face PostScript face handle. output afont_private Output private dictionary structure pointer. return FreeType error code. 0 means success. note The string pointers within the PS_PrivateRec structure are owned by the face and don't need to be freed by the caller. If the font's format is not PostScript-based, this function returns the FT_Err_Invalid_Argument error code. FT_Get_PS_Font_Value Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Long ) FT_Get_PS_Font_Value ( FT_Face face, PS_Dict_Keys key, FT_UInt idx, void *value, FT_Long value_len ); Retrieve the value for the supplied key from a PostScript font. input face PostScript face handle. key An enumeration value representing the dictionary key to retrieve. idx For array values, this specifies the index to be returned. value A pointer to memory into which to write the value. valen_len The size, in bytes, of the memory supplied for the value. output value The value matching the above key, if it exists. return The amount of memory (in bytes) required to hold the requested value (if it exists, -1 otherwise). note The values returned are not pointers into the internal structures of the face, but are fresh copies, so that the memory containing them belongs to the calling application. This also enforces the read-only nature of these values, i.e., this function cannot be used to manipulate the face. value is a void pointer because the values returned can be of various types. If either value is NULL or value_len is too small, just the required memory size for the requested entry is returned. The idx parameter is used, not only to retrieve elements of, for example, the FontMatrix or FontBBox, but also to retrieve name keys from the CharStrings dictionary, and the charstrings themselves. It is ignored for atomic values. PS_DICT_BLUE_SCALE returns a value that is scaled up by 1000. To get the value as in the font stream, you need to divide by 65536000.0 (to remove the FT_Fixed scale, and the x1000 scale). IMPORTANT: Only key/value pairs read by the FreeType interpreter can be retrieved. So, for example, PostScript procedures such as NP, ND, and RD are not available. Arbitrary keys are, obviously, not be available either. If the font's format is not PostScript-based, this function returns the FT_Err_Invalid_Argument error code. since 2.4.8 T1_Blend_Flags Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef enum T1_Blend_Flags_ { /* required fields in a FontInfo blend dictionary */ T1_BLEND_UNDERLINE_POSITION = 0, T1_BLEND_UNDERLINE_THICKNESS , T1_BLEND_ITALIC_ANGLE , /* required fields in a Private blend dictionary */ T1_BLEND_BLUE_VALUES , T1_BLEND_OTHER_BLUES , T1_BLEND_STANDARD_WIDTH , T1_BLEND_STANDARD_HEIGHT , T1_BLEND_STEM_SNAP_WIDTHS , T1_BLEND_STEM_SNAP_HEIGHTS , T1_BLEND_BLUE_SCALE , T1_BLEND_BLUE_SHIFT , T1_BLEND_FAMILY_BLUES , T1_BLEND_FAMILY_OTHER_BLUES , T1_BLEND_FORCE_BOLD , T1_BLEND_MAX /* do not remove */ } T1_Blend_Flags ; /* these constants are deprecated; use the corresponding */ /* ` T1_Blend_Flags ` values instead */ # define t1_blend_underline_position T1_BLEND_UNDERLINE_POSITION # define t1_blend_underline_thickness T1_BLEND_UNDERLINE_THICKNESS # define t1_blend_italic_angle T1_BLEND_ITALIC_ANGLE # define t1_blend_blue_values T1_BLEND_BLUE_VALUES # define t1_blend_other_blues T1_BLEND_OTHER_BLUES # define t1_blend_standard_widths T1_BLEND_STANDARD_WIDTH # define t1_blend_standard_height T1_BLEND_STANDARD_HEIGHT # define t1_blend_stem_snap_widths T1_BLEND_STEM_SNAP_WIDTHS # define t1_blend_stem_snap_heights T1_BLEND_STEM_SNAP_HEIGHTS # define t1_blend_blue_scale T1_BLEND_BLUE_SCALE # define t1_blend_blue_shift T1_BLEND_BLUE_SHIFT # define t1_blend_family_blues T1_BLEND_FAMILY_BLUES # define t1_blend_family_other_blues T1_BLEND_FAMILY_OTHER_BLUES # define t1_blend_force_bold T1_BLEND_FORCE_BOLD # define t1_blend_max T1_BLEND_MAX A set of flags used to indicate which fields are present in a given blend dictionary (font info or private). Used to support Multiple Masters fonts. values T1_BLEND_UNDERLINE_POSITION T1_BLEND_UNDERLINE_THICKNESS T1_BLEND_ITALIC_ANGLE T1_BLEND_BLUE_VALUES T1_BLEND_OTHER_BLUES T1_BLEND_STANDARD_WIDTH T1_BLEND_STANDARD_HEIGHT T1_BLEND_STEM_SNAP_WIDTHS T1_BLEND_STEM_SNAP_HEIGHTS T1_BLEND_BLUE_SCALE T1_BLEND_BLUE_SHIFT T1_BLEND_FAMILY_BLUES T1_BLEND_FAMILY_OTHER_BLUES T1_BLEND_FORCE_BOLD T1_EncodingType Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef enum T1_EncodingType_ { T1_ENCODING_TYPE_NONE = 0, T1_ENCODING_TYPE_ARRAY , T1_ENCODING_TYPE_STANDARD , T1_ENCODING_TYPE_ISOLATIN1 , T1_ENCODING_TYPE_EXPERT } T1_EncodingType ; An enumeration describing the Encoding entry in a Type 1 dictionary. values T1_ENCODING_TYPE_NONE T1_ENCODING_TYPE_ARRAY T1_ENCODING_TYPE_STANDARD T1_ENCODING_TYPE_ISOLATIN1 T1_ENCODING_TYPE_EXPERT since 2.4.8 PS_Dict_Keys Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef enum PS_Dict_Keys_ { /* conventionally in the font dictionary */ PS_DICT_FONT_TYPE , /* FT_Byte */ PS_DICT_FONT_MATRIX , /* FT_Fixed */ PS_DICT_FONT_BBOX , /* FT_Fixed */ PS_DICT_PAINT_TYPE , /* FT_Byte */ PS_DICT_FONT_NAME , /* FT_String * */ PS_DICT_UNIQUE_ID , /* FT_Int */ PS_DICT_NUM_CHAR_STRINGS , /* FT_Int */ PS_DICT_CHAR_STRING_KEY , /* FT_String * */ PS_DICT_CHAR_STRING , /* FT_String * */ PS_DICT_ENCODING_TYPE , /* T1_EncodingType */ PS_DICT_ENCODING_ENTRY , /* FT_String * */ /* conventionally in the font Private dictionary */ PS_DICT_NUM_SUBRS , /* FT_Int */ PS_DICT_SUBR , /* FT_String * */ PS_DICT_STD_HW , /* FT_UShort */ PS_DICT_STD_VW , /* FT_UShort */ PS_DICT_NUM_BLUE_VALUES , /* FT_Byte */ PS_DICT_BLUE_VALUE , /* FT_Short */ PS_DICT_BLUE_FUZZ , /* FT_Int */ PS_DICT_NUM_OTHER_BLUES , /* FT_Byte */ PS_DICT_OTHER_BLUE , /* FT_Short */ PS_DICT_NUM_FAMILY_BLUES , /* FT_Byte */ PS_DICT_FAMILY_BLUE , /* FT_Short */ PS_DICT_NUM_FAMILY_OTHER_BLUES , /* FT_Byte */ PS_DICT_FAMILY_OTHER_BLUE , /* FT_Short */ PS_DICT_BLUE_SCALE , /* FT_Fixed */ PS_DICT_BLUE_SHIFT , /* FT_Int */ PS_DICT_NUM_STEM_SNAP_H , /* FT_Byte */ PS_DICT_STEM_SNAP_H , /* FT_Short */ PS_DICT_NUM_STEM_SNAP_V , /* FT_Byte */ PS_DICT_STEM_SNAP_V , /* FT_Short */ PS_DICT_FORCE_BOLD , /* FT_Bool */ PS_DICT_RND_STEM_UP , /* FT_Bool */ PS_DICT_MIN_FEATURE , /* FT_Short */ PS_DICT_LEN_IV , /* FT_Int */ PS_DICT_PASSWORD , /* FT_Long */ PS_DICT_LANGUAGE_GROUP , /* FT_Long */ /* conventionally in the font FontInfo dictionary */ PS_DICT_VERSION , /* FT_String * */ PS_DICT_NOTICE , /* FT_String * */ PS_DICT_FULL_NAME , /* FT_String * */ PS_DICT_FAMILY_NAME , /* FT_String * */ PS_DICT_WEIGHT , /* FT_String * */ PS_DICT_IS_FIXED_PITCH , /* FT_Bool */ PS_DICT_UNDERLINE_POSITION , /* FT_Short */ PS_DICT_UNDERLINE_THICKNESS , /* FT_UShort */ PS_DICT_FS_TYPE , /* FT_UShort */ PS_DICT_ITALIC_ANGLE , /* FT_Long */ PS_DICT_MAX = PS_DICT_ITALIC_ANGLE } PS_Dict_Keys ; An enumeration used in calls to FT_Get_PS_Font_Value to identify the Type 1 dictionary entry to retrieve. values PS_DICT_FONT_TYPE PS_DICT_FONT_MATRIX PS_DICT_FONT_BBOX PS_DICT_PAINT_TYPE PS_DICT_FONT_NAME PS_DICT_UNIQUE_ID PS_DICT_NUM_CHAR_STRINGS PS_DICT_CHAR_STRING_KEY PS_DICT_CHAR_STRING PS_DICT_ENCODING_TYPE PS_DICT_ENCODING_ENTRY PS_DICT_NUM_SUBRS PS_DICT_SUBR PS_DICT_STD_HW PS_DICT_STD_VW PS_DICT_NUM_BLUE_VALUES PS_DICT_BLUE_VALUE PS_DICT_BLUE_FUZZ PS_DICT_NUM_OTHER_BLUES PS_DICT_OTHER_BLUE PS_DICT_NUM_FAMILY_BLUES PS_DICT_FAMILY_BLUE PS_DICT_NUM_FAMILY_OTHER_BLUES PS_DICT_FAMILY_OTHER_BLUE PS_DICT_BLUE_SCALE PS_DICT_BLUE_SHIFT PS_DICT_NUM_STEM_SNAP_H PS_DICT_STEM_SNAP_H PS_DICT_NUM_STEM_SNAP_V PS_DICT_STEM_SNAP_V PS_DICT_FORCE_BOLD PS_DICT_RND_STEM_UP PS_DICT_MIN_FEATURE PS_DICT_LEN_IV PS_DICT_PASSWORD PS_DICT_LANGUAGE_GROUP PS_DICT_VERSION PS_DICT_NOTICE PS_DICT_FULL_NAME PS_DICT_FAMILY_NAME PS_DICT_WEIGHT PS_DICT_IS_FIXED_PITCH PS_DICT_UNDERLINE_POSITION PS_DICT_UNDERLINE_THICKNESS PS_DICT_FS_TYPE PS_DICT_ITALIC_ANGLE since 2.4.8 T1_FontInfo Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef PS_FontInfoRec T1_FontInfo ; This type is equivalent to PS_FontInfoRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType. T1_Private Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef PS_PrivateRec T1_Private ; This type is equivalent to PS_PrivateRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType. CID_FontDict Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef CID_FaceDictRec CID_FontDict ; This type is equivalent to CID_FaceDictRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType. CID_Info Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef CID_FaceInfoRec CID_Info ; This type is equivalent to CID_FaceInfoRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType.","title":"Type 1 Tables"},{"location":"ft2-type1_tables.html#type-1-tables","text":"","title":"Type 1 Tables"},{"location":"ft2-type1_tables.html#synopsis","text":"This section contains the definition of Type 1-specific tables, including structures related to other PostScript font formats.","title":"Synopsis"},{"location":"ft2-type1_tables.html#ps_fontinforec","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_FontInfoRec_ { FT_String * version; FT_String * notice; FT_String * full_name; FT_String * family_name; FT_String * weight; FT_Long italic_angle; FT_Bool is_fixed_pitch; FT_Short underline_position; FT_UShort underline_thickness; } PS_FontInfoRec ; A structure used to model a Type 1 or Type 2 FontInfo dictionary. Note that for Multiple Master fonts, each instance has its own FontInfo dictionary.","title":"PS_FontInfoRec"},{"location":"ft2-type1_tables.html#ps_fontinfo","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_FontInfoRec_* PS_FontInfo ; A handle to a PS_FontInfoRec structure.","title":"PS_FontInfo"},{"location":"ft2-type1_tables.html#ps_privaterec","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_PrivateRec_ { FT_Int unique_id; FT_Int lenIV; FT_Byte num_blue_values; FT_Byte num_other_blues; FT_Byte num_family_blues; FT_Byte num_family_other_blues; FT_Short blue_values[14]; FT_Short other_blues[10]; FT_Short family_blues [14]; FT_Short family_other_blues[10]; FT_Fixed blue_scale; FT_Int blue_shift; FT_Int blue_fuzz; FT_UShort standard_width[1]; FT_UShort standard_height[1]; FT_Byte num_snap_widths; FT_Byte num_snap_heights; FT_Bool force_bold; FT_Bool round_stem_up; FT_Short snap_widths [13]; /* including std width */ FT_Short snap_heights[13]; /* including std height */ FT_Fixed expansion_factor; FT_Long language_group; FT_Long password; FT_Short min_feature[2]; } PS_PrivateRec ; A structure used to model a Type 1 or Type 2 private dictionary. Note that for Multiple Master fonts, each instance has its own Private dictionary.","title":"PS_PrivateRec"},{"location":"ft2-type1_tables.html#ps_private","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct PS_PrivateRec_* PS_Private ; A handle to a PS_PrivateRec structure.","title":"PS_Private"},{"location":"ft2-type1_tables.html#cid_facedictrec","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceDictRec_ { PS_PrivateRec private_dict; FT_UInt len_buildchar; FT_Fixed forcebold_threshold; FT_Pos stroke_width; FT_Fixed expansion_factor; /* this is a duplicate of */ /* `private_dict- expansion_factor' */ FT_Byte paint_type; FT_Byte font_type; FT_Matrix font_matrix; FT_Vector font_offset; FT_UInt num_subrs; FT_ULong subrmap_offset; FT_Int sd_bytes; } CID_FaceDictRec ; A structure used to represent data in a CID top-level dictionary. In most cases, they are part of the font's /FDArray array. Within a CID font file, such (internal) subfont dictionaries are enclosed by %ADOBeginFontDict and %ADOEndFontDict comments. Note that CID_FaceDictRec misses a field for the /FontName keyword, specifying the subfont's name (the top-level font name is given by the /CIDFontName keyword). This is an oversight, but it doesn't limit the cid font module's functionality because FreeType neither needs this entry nor gives access to CID subfonts.","title":"CID_FaceDictRec"},{"location":"ft2-type1_tables.html#cid_facedict","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceDictRec_* CID_FaceDict ; A handle to a CID_FaceDictRec structure.","title":"CID_FaceDict"},{"location":"ft2-type1_tables.html#cid_faceinforec","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceInfoRec_ { FT_String * cid_font_name; FT_Fixed cid_version; FT_Int cid_font_type; FT_String * registry; FT_String * ordering; FT_Int supplement; PS_FontInfoRec font_info; FT_BBox font_bbox; FT_ULong uid_base; FT_Int num_xuid; FT_ULong xuid[16]; FT_ULong cidmap_offset; FT_Int fd_bytes; FT_Int gd_bytes; FT_ULong cid_count; FT_Int num_dicts; CID_FaceDict font_dicts; FT_ULong data_offset; } CID_FaceInfoRec ; A structure used to represent CID Face information.","title":"CID_FaceInfoRec"},{"location":"ft2-type1_tables.html#cid_faceinfo","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef struct CID_FaceInfoRec_* CID_FaceInfo ; A handle to a CID_FaceInfoRec structure.","title":"CID_FaceInfo"},{"location":"ft2-type1_tables.html#ft_has_ps_glyph_names","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Int ) FT_Has_PS_Glyph_Names ( FT_Face face ); Return true if a given face provides reliable PostScript glyph names. This is similar to using the FT_HAS_GLYPH_NAMES macro, except that certain fonts (mostly TrueType) contain incorrect glyph name tables. When this function returns true, the caller is sure that the glyph names returned by FT_Get_Glyph_Name are reliable.","title":"FT_Has_PS_Glyph_Names"},{"location":"ft2-type1_tables.html#ft_get_ps_font_info","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Error ) FT_Get_PS_Font_Info ( FT_Face face, PS_FontInfo afont_info ); Retrieve the PS_FontInfoRec structure corresponding to a given PostScript font.","title":"FT_Get_PS_Font_Info"},{"location":"ft2-type1_tables.html#ft_get_ps_font_private","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Error ) FT_Get_PS_Font_Private ( FT_Face face, PS_Private afont_private ); Retrieve the PS_PrivateRec structure corresponding to a given PostScript font.","title":"FT_Get_PS_Font_Private"},{"location":"ft2-type1_tables.html#ft_get_ps_font_value","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). FT_EXPORT( FT_Long ) FT_Get_PS_Font_Value ( FT_Face face, PS_Dict_Keys key, FT_UInt idx, void *value, FT_Long value_len ); Retrieve the value for the supplied key from a PostScript font.","title":"FT_Get_PS_Font_Value"},{"location":"ft2-type1_tables.html#t1_blend_flags","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef enum T1_Blend_Flags_ { /* required fields in a FontInfo blend dictionary */ T1_BLEND_UNDERLINE_POSITION = 0, T1_BLEND_UNDERLINE_THICKNESS , T1_BLEND_ITALIC_ANGLE , /* required fields in a Private blend dictionary */ T1_BLEND_BLUE_VALUES , T1_BLEND_OTHER_BLUES , T1_BLEND_STANDARD_WIDTH , T1_BLEND_STANDARD_HEIGHT , T1_BLEND_STEM_SNAP_WIDTHS , T1_BLEND_STEM_SNAP_HEIGHTS , T1_BLEND_BLUE_SCALE , T1_BLEND_BLUE_SHIFT , T1_BLEND_FAMILY_BLUES , T1_BLEND_FAMILY_OTHER_BLUES , T1_BLEND_FORCE_BOLD , T1_BLEND_MAX /* do not remove */ } T1_Blend_Flags ; /* these constants are deprecated; use the corresponding */ /* ` T1_Blend_Flags ` values instead */ # define t1_blend_underline_position T1_BLEND_UNDERLINE_POSITION # define t1_blend_underline_thickness T1_BLEND_UNDERLINE_THICKNESS # define t1_blend_italic_angle T1_BLEND_ITALIC_ANGLE # define t1_blend_blue_values T1_BLEND_BLUE_VALUES # define t1_blend_other_blues T1_BLEND_OTHER_BLUES # define t1_blend_standard_widths T1_BLEND_STANDARD_WIDTH # define t1_blend_standard_height T1_BLEND_STANDARD_HEIGHT # define t1_blend_stem_snap_widths T1_BLEND_STEM_SNAP_WIDTHS # define t1_blend_stem_snap_heights T1_BLEND_STEM_SNAP_HEIGHTS # define t1_blend_blue_scale T1_BLEND_BLUE_SCALE # define t1_blend_blue_shift T1_BLEND_BLUE_SHIFT # define t1_blend_family_blues T1_BLEND_FAMILY_BLUES # define t1_blend_family_other_blues T1_BLEND_FAMILY_OTHER_BLUES # define t1_blend_force_bold T1_BLEND_FORCE_BOLD # define t1_blend_max T1_BLEND_MAX A set of flags used to indicate which fields are present in a given blend dictionary (font info or private). Used to support Multiple Masters fonts.","title":"T1_Blend_Flags"},{"location":"ft2-type1_tables.html#t1_encodingtype","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef enum T1_EncodingType_ { T1_ENCODING_TYPE_NONE = 0, T1_ENCODING_TYPE_ARRAY , T1_ENCODING_TYPE_STANDARD , T1_ENCODING_TYPE_ISOLATIN1 , T1_ENCODING_TYPE_EXPERT } T1_EncodingType ; An enumeration describing the Encoding entry in a Type 1 dictionary.","title":"T1_EncodingType"},{"location":"ft2-type1_tables.html#ps_dict_keys","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef enum PS_Dict_Keys_ { /* conventionally in the font dictionary */ PS_DICT_FONT_TYPE , /* FT_Byte */ PS_DICT_FONT_MATRIX , /* FT_Fixed */ PS_DICT_FONT_BBOX , /* FT_Fixed */ PS_DICT_PAINT_TYPE , /* FT_Byte */ PS_DICT_FONT_NAME , /* FT_String * */ PS_DICT_UNIQUE_ID , /* FT_Int */ PS_DICT_NUM_CHAR_STRINGS , /* FT_Int */ PS_DICT_CHAR_STRING_KEY , /* FT_String * */ PS_DICT_CHAR_STRING , /* FT_String * */ PS_DICT_ENCODING_TYPE , /* T1_EncodingType */ PS_DICT_ENCODING_ENTRY , /* FT_String * */ /* conventionally in the font Private dictionary */ PS_DICT_NUM_SUBRS , /* FT_Int */ PS_DICT_SUBR , /* FT_String * */ PS_DICT_STD_HW , /* FT_UShort */ PS_DICT_STD_VW , /* FT_UShort */ PS_DICT_NUM_BLUE_VALUES , /* FT_Byte */ PS_DICT_BLUE_VALUE , /* FT_Short */ PS_DICT_BLUE_FUZZ , /* FT_Int */ PS_DICT_NUM_OTHER_BLUES , /* FT_Byte */ PS_DICT_OTHER_BLUE , /* FT_Short */ PS_DICT_NUM_FAMILY_BLUES , /* FT_Byte */ PS_DICT_FAMILY_BLUE , /* FT_Short */ PS_DICT_NUM_FAMILY_OTHER_BLUES , /* FT_Byte */ PS_DICT_FAMILY_OTHER_BLUE , /* FT_Short */ PS_DICT_BLUE_SCALE , /* FT_Fixed */ PS_DICT_BLUE_SHIFT , /* FT_Int */ PS_DICT_NUM_STEM_SNAP_H , /* FT_Byte */ PS_DICT_STEM_SNAP_H , /* FT_Short */ PS_DICT_NUM_STEM_SNAP_V , /* FT_Byte */ PS_DICT_STEM_SNAP_V , /* FT_Short */ PS_DICT_FORCE_BOLD , /* FT_Bool */ PS_DICT_RND_STEM_UP , /* FT_Bool */ PS_DICT_MIN_FEATURE , /* FT_Short */ PS_DICT_LEN_IV , /* FT_Int */ PS_DICT_PASSWORD , /* FT_Long */ PS_DICT_LANGUAGE_GROUP , /* FT_Long */ /* conventionally in the font FontInfo dictionary */ PS_DICT_VERSION , /* FT_String * */ PS_DICT_NOTICE , /* FT_String * */ PS_DICT_FULL_NAME , /* FT_String * */ PS_DICT_FAMILY_NAME , /* FT_String * */ PS_DICT_WEIGHT , /* FT_String * */ PS_DICT_IS_FIXED_PITCH , /* FT_Bool */ PS_DICT_UNDERLINE_POSITION , /* FT_Short */ PS_DICT_UNDERLINE_THICKNESS , /* FT_UShort */ PS_DICT_FS_TYPE , /* FT_UShort */ PS_DICT_ITALIC_ANGLE , /* FT_Long */ PS_DICT_MAX = PS_DICT_ITALIC_ANGLE } PS_Dict_Keys ; An enumeration used in calls to FT_Get_PS_Font_Value to identify the Type 1 dictionary entry to retrieve.","title":"PS_Dict_Keys"},{"location":"ft2-type1_tables.html#t1_fontinfo","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef PS_FontInfoRec T1_FontInfo ; This type is equivalent to PS_FontInfoRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType.","title":"T1_FontInfo"},{"location":"ft2-type1_tables.html#t1_private","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef PS_PrivateRec T1_Private ; This type is equivalent to PS_PrivateRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType.","title":"T1_Private"},{"location":"ft2-type1_tables.html#cid_fontdict","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef CID_FaceDictRec CID_FontDict ; This type is equivalent to CID_FaceDictRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType.","title":"CID_FontDict"},{"location":"ft2-type1_tables.html#cid_info","text":"Defined in FT_TYPE1_TABLES_H (freetype/t1tables.h). typedef CID_FaceInfoRec CID_Info ; This type is equivalent to CID_FaceInfoRec . It is deprecated but kept to maintain source compatibility between various versions of FreeType.","title":"CID_Info"},{"location":"ft2-user_allocation.html","text":"FreeType Docs General Remarks User allocation User allocation Synopsis FreeType assumes that structures allocated by the user and passed as arguments are zeroed out except for the actual data. In other words, it is recommended to use calloc (or variants of it) instead of malloc for allocation.","title":"User allocation"},{"location":"ft2-user_allocation.html#user-allocation","text":"","title":"User allocation"},{"location":"ft2-user_allocation.html#synopsis","text":"FreeType assumes that structures allocated by the user and passed as arguments are zeroed out except for the actual data. In other words, it is recommended to use calloc (or variants of it) instead of malloc for allocation.","title":"Synopsis"},{"location":"ft2-version.html","text":"FreeType Docs Core API FreeType Version FreeType Version Synopsis Note that those functions and macros are of limited use because even a new release of FreeType with only documentation changes increases the version number. FT_Library_Version Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( void ) FT_Library_Version ( FT_Library library, FT_Int *amajor, FT_Int *aminor, FT_Int *apatch ); Return the version of the FreeType library being used. This is useful when dynamically linking to the library, since one cannot use the macros FREETYPE_MAJOR , FREETYPE_MINOR , and FREETYPE_PATCH . input library A source library handle. output amajor The major version number. aminor The minor version number. apatch The patch version number. note The reason why this function takes a library argument is because certain programs implement library initialization in a custom way that doesn't use FT_Init_FreeType . In such cases, the library version might not be available before the library object has been created. FT_Face_CheckTrueTypePatents Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Bool ) FT_Face_CheckTrueTypePatents ( FT_Face face ); Deprecated, does nothing. input face A face handle. return Always returns false. note Since May 2010, TrueType hinting is no longer patented. since 2.3.5 FT_Face_SetUnpatentedHinting Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Bool ) FT_Face_SetUnpatentedHinting ( FT_Face face, FT_Bool value ); Deprecated, does nothing. input face A face handle. value New boolean setting. return Always returns false. note Since May 2010, TrueType hinting is no longer patented. since 2.3.5 FREETYPE_XXX Defined in FT_FREETYPE_H (freetype/freetype.h). # define FREETYPE_MAJOR 2 # define FREETYPE_MINOR 10 # define FREETYPE_PATCH 0 These three macros identify the FreeType source code version. Use FT_Library_Version to access them at runtime. values FREETYPE_MAJOR The major version number. FREETYPE_MINOR The minor version number. FREETYPE_PATCH The patch level. note The version number of FreeType if built as a dynamic link library with the libtool package is not controlled by these three macros.","title":"FreeType Version"},{"location":"ft2-version.html#freetype-version","text":"","title":"FreeType Version"},{"location":"ft2-version.html#synopsis","text":"Note that those functions and macros are of limited use because even a new release of FreeType with only documentation changes increases the version number.","title":"Synopsis"},{"location":"ft2-version.html#ft_library_version","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( void ) FT_Library_Version ( FT_Library library, FT_Int *amajor, FT_Int *aminor, FT_Int *apatch ); Return the version of the FreeType library being used. This is useful when dynamically linking to the library, since one cannot use the macros FREETYPE_MAJOR , FREETYPE_MINOR , and FREETYPE_PATCH .","title":"FT_Library_Version"},{"location":"ft2-version.html#ft_face_checktruetypepatents","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Bool ) FT_Face_CheckTrueTypePatents ( FT_Face face ); Deprecated, does nothing.","title":"FT_Face_CheckTrueTypePatents"},{"location":"ft2-version.html#ft_face_setunpatentedhinting","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). FT_EXPORT( FT_Bool ) FT_Face_SetUnpatentedHinting ( FT_Face face, FT_Bool value ); Deprecated, does nothing.","title":"FT_Face_SetUnpatentedHinting"},{"location":"ft2-version.html#freetype_xxx","text":"Defined in FT_FREETYPE_H (freetype/freetype.h). # define FREETYPE_MAJOR 2 # define FREETYPE_MINOR 10 # define FREETYPE_PATCH 0 These three macros identify the FreeType source code version. Use FT_Library_Version to access them at runtime.","title":"FREETYPE_XXX"},{"location":"ft2-winfnt_fonts.html","text":"FreeType Docs Format-Specific API Window FNT Files Window FNT Files Synopsis This section contains the declaration of Windows FNT-specific functions. FT_WinFNT_ID_XXX Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). # define FT_WinFNT_ID_CP1252 0 # define FT_WinFNT_ID_DEFAULT 1 # define FT_WinFNT_ID_SYMBOL 2 # define FT_WinFNT_ID_MAC 77 # define FT_WinFNT_ID_CP932 128 # define FT_WinFNT_ID_CP949 129 # define FT_WinFNT_ID_CP1361 130 # define FT_WinFNT_ID_CP936 134 # define FT_WinFNT_ID_CP950 136 # define FT_WinFNT_ID_CP1253 161 # define FT_WinFNT_ID_CP1254 162 # define FT_WinFNT_ID_CP1258 163 # define FT_WinFNT_ID_CP1255 177 # define FT_WinFNT_ID_CP1256 178 # define FT_WinFNT_ID_CP1257 186 # define FT_WinFNT_ID_CP1251 204 # define FT_WinFNT_ID_CP874 222 # define FT_WinFNT_ID_CP1250 238 # define FT_WinFNT_ID_OEM 255 A list of valid values for the charset byte in FT_WinFNT_HeaderRec . Exact mapping tables for the various cpXXXX encodings (except for cp1361 ) can be found at ftp://ftp.unicode.org/Public in the MAPPINGS/VENDORS/MICSFT/WINDOWS subdirectory. cp1361 is roughly a superset of MAPPINGS/OBSOLETE/EASTASIA/KSC/JOHAB.TXT . values FT_WinFNT_ID_DEFAULT This is used for font enumeration and font creation as a don't care value. Valid font files don't contain this value. When querying for information about the character set of the font that is currently selected into a specified device context, this return value (of the related Windows API) simply denotes failure. FT_WinFNT_ID_SYMBOL There is no known mapping table available. FT_WinFNT_ID_MAC Mac Roman encoding. FT_WinFNT_ID_OEM From Michael Poettgen michael@poettgen.de : The Windows Font Mapping article says that FT_WinFNT_ID_OEM is used for the charset of vector fonts, like modern.fon , roman.fon , and script.fon on Windows. The CreateFont documentation says: The FT_WinFNT_ID_OEM value specifies a character set that is operating-system dependent. The IFIMETRICS documentation from the Windows Driver Development Kit says: This font supports an OEM-specific character set. The OEM character set is system dependent. In general OEM, as opposed to ANSI (i.e., cp1252 ), denotes the second default codepage that most international versions of Windows have. It is one of the OEM codepages from https://docs.microsoft.com/en-us/windows/desktop/intl/code-page-identifiers , and is used for the DOS boxes , to support legacy applications. A German Windows version for example usually uses ANSI codepage 1252 and OEM codepage 850. FT_WinFNT_ID_CP874 A superset of Thai TIS 620 and ISO 8859-11. FT_WinFNT_ID_CP932 A superset of Japanese Shift-JIS (with minor deviations). FT_WinFNT_ID_CP936 A superset of simplified Chinese GB 2312-1980 (with different ordering and minor deviations). FT_WinFNT_ID_CP949 A superset of Korean Hangul KS C 5601-1987 (with different ordering and minor deviations). FT_WinFNT_ID_CP950 A superset of traditional Chinese Big 5 ETen (with different ordering and minor deviations). FT_WinFNT_ID_CP1250 A superset of East European ISO 8859-2 (with slightly different ordering). FT_WinFNT_ID_CP1251 A superset of Russian ISO 8859-5 (with different ordering). FT_WinFNT_ID_CP1252 ANSI encoding. A superset of ISO 8859-1. FT_WinFNT_ID_CP1253 A superset of Greek ISO 8859-7 (with minor modifications). FT_WinFNT_ID_CP1254 A superset of Turkish ISO 8859-9. FT_WinFNT_ID_CP1255 A superset of Hebrew ISO 8859-8 (with some modifications). FT_WinFNT_ID_CP1256 A superset of Arabic ISO 8859-6 (with different ordering). FT_WinFNT_ID_CP1257 A superset of Baltic ISO 8859-13 (with some deviations). FT_WinFNT_ID_CP1258 For Vietnamese. This encoding doesn't cover all necessary characters. FT_WinFNT_ID_CP1361 Korean (Johab). FT_WinFNT_HeaderRec Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). typedef struct FT_WinFNT_HeaderRec_ { FT_UShort version; FT_ULong file_size; FT_Byte copyright[60]; FT_UShort file_type; FT_UShort nominal_point_size; FT_UShort vertical_resolution; FT_UShort horizontal_resolution; FT_UShort ascent; FT_UShort internal_leading; FT_UShort external_leading; FT_Byte italic; FT_Byte underline; FT_Byte strike_out; FT_UShort weight; FT_Byte charset; FT_UShort pixel_width; FT_UShort pixel_height; FT_Byte pitch_and_family; FT_UShort avg_width; FT_UShort max_width; FT_Byte first_char; FT_Byte last_char; FT_Byte default_char; FT_Byte break_char; FT_UShort bytes_per_row; FT_ULong device_offset; FT_ULong face_name_offset; FT_ULong bits_pointer; FT_ULong bits_offset; FT_Byte reserved; FT_ULong flags; FT_UShort A_space; FT_UShort B_space; FT_UShort C_space; FT_UShort color_table_offset; FT_ULong reserved1[4]; } FT_WinFNT_HeaderRec ; Windows FNT Header info. FT_WinFNT_Header Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). typedef struct FT_WinFNT_HeaderRec_* FT_WinFNT_Header ; A handle to an FT_WinFNT_HeaderRec structure. FT_Get_WinFNT_Header Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). FT_EXPORT( FT_Error ) FT_Get_WinFNT_Header ( FT_Face face, FT_WinFNT_HeaderRec *aheader ); Retrieve a Windows FNT font info header. input face A handle to the input face. output aheader The WinFNT header. return FreeType error code. 0 means success. note This function only works with Windows FNT faces, returning an error otherwise.","title":"Window FNT Files"},{"location":"ft2-winfnt_fonts.html#window-fnt-files","text":"","title":"Window FNT Files"},{"location":"ft2-winfnt_fonts.html#synopsis","text":"This section contains the declaration of Windows FNT-specific functions.","title":"Synopsis"},{"location":"ft2-winfnt_fonts.html#ft_winfnt_id_xxx","text":"Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). # define FT_WinFNT_ID_CP1252 0 # define FT_WinFNT_ID_DEFAULT 1 # define FT_WinFNT_ID_SYMBOL 2 # define FT_WinFNT_ID_MAC 77 # define FT_WinFNT_ID_CP932 128 # define FT_WinFNT_ID_CP949 129 # define FT_WinFNT_ID_CP1361 130 # define FT_WinFNT_ID_CP936 134 # define FT_WinFNT_ID_CP950 136 # define FT_WinFNT_ID_CP1253 161 # define FT_WinFNT_ID_CP1254 162 # define FT_WinFNT_ID_CP1258 163 # define FT_WinFNT_ID_CP1255 177 # define FT_WinFNT_ID_CP1256 178 # define FT_WinFNT_ID_CP1257 186 # define FT_WinFNT_ID_CP1251 204 # define FT_WinFNT_ID_CP874 222 # define FT_WinFNT_ID_CP1250 238 # define FT_WinFNT_ID_OEM 255 A list of valid values for the charset byte in FT_WinFNT_HeaderRec . Exact mapping tables for the various cpXXXX encodings (except for cp1361 ) can be found at ftp://ftp.unicode.org/Public in the MAPPINGS/VENDORS/MICSFT/WINDOWS subdirectory. cp1361 is roughly a superset of MAPPINGS/OBSOLETE/EASTASIA/KSC/JOHAB.TXT .","title":"FT_WinFNT_ID_XXX"},{"location":"ft2-winfnt_fonts.html#ft_winfnt_headerrec","text":"Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). typedef struct FT_WinFNT_HeaderRec_ { FT_UShort version; FT_ULong file_size; FT_Byte copyright[60]; FT_UShort file_type; FT_UShort nominal_point_size; FT_UShort vertical_resolution; FT_UShort horizontal_resolution; FT_UShort ascent; FT_UShort internal_leading; FT_UShort external_leading; FT_Byte italic; FT_Byte underline; FT_Byte strike_out; FT_UShort weight; FT_Byte charset; FT_UShort pixel_width; FT_UShort pixel_height; FT_Byte pitch_and_family; FT_UShort avg_width; FT_UShort max_width; FT_Byte first_char; FT_Byte last_char; FT_Byte default_char; FT_Byte break_char; FT_UShort bytes_per_row; FT_ULong device_offset; FT_ULong face_name_offset; FT_ULong bits_pointer; FT_ULong bits_offset; FT_Byte reserved; FT_ULong flags; FT_UShort A_space; FT_UShort B_space; FT_UShort C_space; FT_UShort color_table_offset; FT_ULong reserved1[4]; } FT_WinFNT_HeaderRec ; Windows FNT Header info.","title":"FT_WinFNT_HeaderRec"},{"location":"ft2-winfnt_fonts.html#ft_winfnt_header","text":"Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). typedef struct FT_WinFNT_HeaderRec_* FT_WinFNT_Header ; A handle to an FT_WinFNT_HeaderRec structure.","title":"FT_WinFNT_Header"},{"location":"ft2-winfnt_fonts.html#ft_get_winfnt_header","text":"Defined in FT_WINFONTS_H (freetype/ftwinfnt.h). FT_EXPORT( FT_Error ) FT_Get_WinFNT_Header ( FT_Face face, FT_WinFNT_HeaderRec *aheader ); Retrieve a Windows FNT font info header.","title":"FT_Get_WinFNT_Header"}]} \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/sitemap.xml b/ThirdParty/freetype/docs/reference/site/sitemap.xml deleted file mode 100644 index 3d41c4d..0000000 --- a/ThirdParty/freetype/docs/reference/site/sitemap.xml +++ /dev/null @@ -1,258 +0,0 @@ - - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - - None - 2019-03-15 - daily - - \ No newline at end of file diff --git a/ThirdParty/freetype/docs/reference/site/sitemap.xml.gz b/ThirdParty/freetype/docs/reference/site/sitemap.xml.gz deleted file mode 100644 index 38bc0e4..0000000 Binary files a/ThirdParty/freetype/docs/reference/site/sitemap.xml.gz and /dev/null differ diff --git a/ThirdParty/freetype/docs/reference/site/stylesheets/extra.css b/ThirdParty/freetype/docs/reference/site/stylesheets/extra.css deleted file mode 100644 index cd6a1ee..0000000 --- a/ThirdParty/freetype/docs/reference/site/stylesheets/extra.css +++ /dev/null @@ -1,221 +0,0 @@ -/* Body and page */ -.wy-nav-content { - max-width: 90%; -} -.md-grid { - max-width: 90%; -} -.md-sidebar--secondary { - margin-left: 90%; -} -p { - text-align: justify; - /* margin: 1.5ex 0 1.5ex 0; - */ -} -/* .md-typeset p{ - margin: 1em 1em 0 1em; -} -*/ -/* code blocks */ -pre.colored { - color: blue; -} -pre { - font-family: monospace; - background-color: #D6E8FF; - padding: 2ex 0 2ex 1%; - overflow-x:auto; -} -span.keyword { - font-family: monospace; - text-align: left; - white-space: pre; - color: #d73a49; -} -.md-typeset code { - white-space: pre; -} -/* H4 Heading */ -h4 { - background-color: #EEEEFF; - font-size: medium; - font-style: oblique; - font-weight: bold; - /* margin: 3ex 0 1.5ex 9%; - */ - padding: 0.3em 0 0.3em 1%; -} -/* Fields table */ -table.fields { - width: 90%; - margin: 1.5ex 0 1.5ex 10%; -} -table.fields td.val { - font-weight: bold; - text-align: right; - width: 30%; - vertical-align: baseline; - padding: 1em 1em 0 0; -} -table.fields td.desc { - vertical-align: baseline; - padding: 1ex 0 0 1em; -} -table.fields td.desc p:first-child { - margin: 0; -} - -table.fields td.desc p { - margin: 1.5ex 0 0 0; -} - -/* START EXPERIMENTAL CODE */ -table.long { - display: block; - width: 93%; -} -table.long thead, -table.long tbody, -table.long th, -table.long td, -table.long tr { - display: block; -} -/* Hide table headers (but not display: none; -, for accessibility) */ -table.long thead tr { - position: absolute; - top: -9999px; - left: -9999px; -} -table.long tr { - border: 0; -} -table.long { - margin: 1.5ex 3% 1.5ex 3%; -} -table.long td.val { - text-align: left; -} -table.long td { - /* Behave like a "row" */ - border: none; - border-bottom: 0; - position: relative; - padding-left: 50%; -} -table.long td:before { - /* Now like a table header */ - position: absolute; - /* Top/left values mimic padding */ - top: 6px; - left: 6px; - width: 45%; - padding-right: 10px; - white-space: nowrap; -} -/* END EXPERIMENTAL CODE */ - -/* Index table */ -table.index { - width: 100%; - border-collapse: collapse; - border: 0; - border-spacing: 1em 0.3ex; -} -table.index tr { - padding: 0; -} -table.index td { - padding: 0; -} -table.index-toc-link { - width: 100%; - border: 0; - border-spacing: 0; - margin: 1ex 0 1ex 0; -} -table.index-toc-link td.left { - padding: 0 0.5em 0 0.5em; - font-size: 83%; - text-align: left; -} -table.index-toc-link td.middle { - padding: 0 0.5em 0 0.5em; - font-size: 83%; - text-align: center; -} -table.index-toc-link td.right { - padding: 0 0.5em 0 0.5em; - font-size: 83%; - text-align: right; -} -/* toc table */ -table.toc { - width: 95%; - margin: 1.5ex 0 1.5ex 5%; -} -table.toc td.link { - width: 30%; - text-align: right; - vertical-align: baseline; - padding: 1ex 1em 1ex 0; -} -table.toc td.desc { - vertical-align: baseline; - padding: 1ex 0 1ex 1em; - text-align: left; -} -table.toc td.desc p:first-child { - margin: 0; - text-align: left; -} -table.toc td.desc p { - margin: 1.5ex 0 0 0; - text-align: left; -} -div.timestamp { - font-size: small; -} -/* Max width before this PARTICULAR table gets nasty This query will take effect for any screen smaller than 760px and also iPads specifically. */ -@media only screen and (max-width: 760px), (min-device-width: 768px) and (max-device-width: 1024px) { - /* Force table to not be like tables anymore */ - table, thead, tbody, th, td, tr { - display: block; - } - /* Hide table headers (but not display: none; - , for accessibility) */ - thead tr { - position: absolute; - top: -9999px; - left: -9999px; - } - tr { - border: 0; - } - table.fields { - width: 93%; - margin: 1.5ex 3% 1.5ex 3%; - } - table.fields td.val { - text-align: left; - } - td { - /* Behave like a "row" */ - border: none; - border-bottom: 0; - position: relative; - padding-left: 50%; - } - td:before { - /* Now like a table header */ - position: absolute; - /* Top/left values mimic padding */ - top: 6px; - left: 6px; - width: 45%; - padding-right: 10px; - white-space: nowrap; - } -} diff --git a/ThirdParty/freetype/docs/release b/ThirdParty/freetype/docs/release deleted file mode 100644 index 762f9d5..0000000 --- a/ThirdParty/freetype/docs/release +++ /dev/null @@ -1,202 +0,0 @@ -How to prepare a new release ----------------------------- - -. include/freetype/freetype.h: Update FREETYPE_MAJOR, FREETYPE_MINOR, - and FREETYPE_PATCH. - -. Update version numbers in all files where necessary (for example, do - a grep for both `2.3.1' and `231' for release 2.3.1). - -. builds/unix/configure.raw: Update `version_info'. - -. docs/CHANGES: Document differences to last release. - -. README: Update. - -. docs/VERSIONS.TXT: Document changed `version_info'. - -. ChangeLog: Announce new release (both in the freetype2 and - freetype2-demos modules). - -. Clone the git archive to another directory with - - git clone -l -s . ../freetype2.test - - or something like this and run - - make distclean; make devel; make - make distclean; make devel; make multi - make distclean; make devel CC=g++; make CC=g++ - make distclean; make devel CC=g++; make multi CC=g++ - - sh autogen.sh - make distclean; ./configure; make - make distclean; ./configure CC=g++; make - - in the cloned repository to test compilation with both gcc and g++. - -. Test C++ compilation for freetype2-demos too (using `git clone' as - above). - -. Run src/tools/chktrcmp.py and check that there are no undefined - trace_XXXX macros. - -. After pushing the new release, tag the git repositories (freetype2, - freetype2-demos) with - - git tag VER- -m "" -u - - and push the tags with - - git push --tags - -. Check with - - git clean -ndx - - that the git directory is really clean (and remove extraneous files - if necessary). - -. Say `make dist' in both the freetype2 and freetype2-demos modules - to generate the .tar.gz, .tar.bz2, and .zip files. - -. Create the doc bundles (freetype-doc-.tar.gz, - freetype-doc-.tar.bz2, ftdoc.zip). This is - everything in - - /freetype2/docs - - except the `reference' subdirectory. Do *not* use option `-l' from - zip! - -. Run the following script (with updated `$VERSION', `$SAVANNAH_USER', - and $SOURCEFORGE_USER variables) to sign and upload the bundles to - both Savannah and SourceForge. The signing code has been taken from - the `gnupload' script (part of the automake bundle). - - #!/bin/sh - - VERSION=2.5.1 - SAVANNAH_USER=wl - SOURCEFORGE_USER=wlemb - - ##################################################################### - - GPG='/usr/bin/gpg --batch --no-tty' - - version=`echo $VERSION | sed "s/\\.//g"` - - FREETYPE_PACKAGES="freetype-$VERSION.tar.gz \ - freetype-$VERSION.tar.bz2 \ - ft$version.zip" - FT2DEMOS_PACKAGES="ft2demos-$VERSION.tar.gz \ - ft2demos-$VERSION.tar.bz2 \ - ftdmo$version.zip" - FTDOC_PACKAGES="freetype-doc-$VERSION.tar.gz \ - freetype-doc-$VERSION.tar.bz2 \ - ftdoc$version.zip" - - PACKAGE_LIST="$FREETYPE_PACKAGES \ - $FT2DEMOS_PACKAGES \ - $FTDOC_PACKAGES" - - set -e - unset passphrase - - PATH=/empty echo -n "Enter GPG passphrase: " - stty -echo - read -r passphrase - stty echo - echo - - for f in $PACKAGE_LIST; do - if test ! -f $f; then - echo "$0: Cannot find \`$f'" 1>&2 - exit 1 - else - : - fi - done - - for f in $PACKAGE_LIST; do - echo "Signing $f..." - rm -f $f.sig - echo $passphrase | $GPG --passphrase-fd 0 -ba -o $f.sig $f - done - - FREETYPE_SIGNATURES= - for i in $FREETYPE_PACKAGES; do - FREETYPE_SIGNATURES="$FREETYPE_SIGNATURES $i.sig" - done - - FT2DEMOS_SIGNATURES= - for i in $FT2DEMOS_PACKAGES; do - FT2DEMOS_SIGNATURES="$FT2DEMOS_SIGNATURES $i.sig" - done - - FTDOC_SIGNATURES= - for i in $FTDOC_PACKAGES; do - FTDOC_SIGNATURES="$FTDOC_SIGNATURES $i.sig" - done - - SIGNATURE_LIST="$FREETYPE_SIGNATURES \ - $FT2DEMOS_SIGNATURES \ - $FTDOC_SIGNATURES" - - scp $PACKAGE_LIST $SIGNATURE_LIST \ - $SAVANNAH_USER@dl.sv.nongnu.org:/releases/freetype/ - - rsync -avP -e ssh $FREETYPE_PACKAGES $FREETYPE_SIGNATURES \ - $SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype2/$VERSION/ - rsync -avP -e ssh $FT2DEMOS_PACKAGES $FT2DEMOS_SIGNATURES \ - $SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype-demos/$VERSION/ - rsync -avP -e ssh $FTDOC_PACKAGES $FTDOC_SIGNATURES \ - $SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype-docs/$VERSION/ - - # EOF - -. Prepare a README for SourceForge and upload it with the following - script (with updated `$VERSION' and $SOURCEFORGE_USER variables). - - #!/bin/sh - - VERSION=2.5.1 - SOURCEFORGE_USER=wlemb - - ##################################################################### - - rsync -avP -e ssh README \ - $SOURCEFORGE_USER,freetype@frs.sf.net:/home/frs/project/f/fr/freetype/freetype2/$VERSION/ - - # EOF - -. On SourceForge, tag the just uploaded `ftXXX.zip' and - `freetype-XXX.tar.bz2' files as the default files to download for - `Windows' and `Others', respectively. - -. Copy the reference files (generated by `make dist') to - - /freetype2/docs/reference - -. Update the `freetype-web' repository. `git push' then automatically - triggers an update of the public web pages within ten minutes, due - to a cron script (on wl@freedesktop.org) that rsyncs with - - freedesktop.org://srv/freetype.freedesktop.org/www - -. Announce new release on freetype-announce@nongnu.org and to relevant - newsgroups. - ----------------------------------------------------------------------- - -Copyright (C) 2003-2019 by -David Turner, Robert Wilhelm, and Werner Lemberg. - -This file is part of the FreeType project, and may only be used, -modified, and distributed under the terms of the FreeType project -license, LICENSE.TXT. By continuing to use, modify, or distribute -this file you indicate that you have read the license and understand -and accept it fully. - - ---- end of release --- -- cgit v1.1-26-g67d0