diff options
Diffstat (limited to 'src/render/font.cpp')
| -rw-r--r-- | src/render/font.cpp | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/src/render/font.cpp b/src/render/font.cpp deleted file mode 100644 index 39d1e4e..0000000 --- a/src/render/font.cpp +++ /dev/null @@ -1,189 +0,0 @@ -#include "font.h" - -#include <stdio.h> - -#define STB_TRUETYPE_IMPLEMENTATION -#include "libs/stb/stb_truetype.h" -#include "color.h" - -namespace jin -{ -namespace render -{ - -#define BITMAP_WIDTH 512 -#define BITMAP_HEIGHT 512 -#define PIXEL_HEIGHT 32 - - Font::Font():Drawable() - { - } - - // ttf file read buffer - static unsigned char ttf_buffer[1 << 20]; - - // bitmap for saving font data - static unsigned char temp_bitmap[BITMAP_WIDTH * BITMAP_HEIGHT]; - - void Font::loadf(const char* path) - { - fread(ttf_buffer, 1, 1 << 20, fopen(path, "rb")); - - loadb(ttf_buffer); - } - - /** - * load from memory - */ - void Font::loadb(const unsigned char* data) - { - stbtt_BakeFontBitmap(data, 0, PIXEL_HEIGHT, temp_bitmap, BITMAP_WIDTH, BITMAP_HEIGHT, 32, 96, cdata); - - glGenTextures(1, &texture); - glBindTexture(GL_TEXTURE_2D, texture); - - glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, BITMAP_WIDTH, - BITMAP_HEIGHT, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - - glBindTexture(GL_TEXTURE_2D, 0); - } - - /** - * get texture quad - */ - static Quad getCharQuad(const stbtt_bakedchar* chardata, int pw, int ph, int char_index) - { - float ipw = 1.0f / pw, iph = 1.0f / ph; - const stbtt_bakedchar *b = chardata + char_index; - Quad q; - q.x = b->x0 * ipw; - q.y = b->y0 * iph; - q.w = b->x1 * ipw - b->x0 * ipw; - q.h = b->y1 * iph - b->y0 * iph; - return q; - } - - /** - * render function draw mutiple times - * in loop - */ - void Font::render( - const char* text, // rendered text - float x, float y, // render position - int fheight, // font height - int spacing, // font spacing - int lheight) // line height - { - float _x = x, - _y = y; - - int len = strlen(text); - - glEnable(GL_TEXTURE_2D); - glBindTexture(GL_TEXTURE_2D, texture); - - glEnableClientState(GL_VERTEX_ARRAY); - glEnableClientState(GL_TEXTURE_COORD_ARRAY); - - // for saving clip quad - stbtt_aligned_quad q; - - // render every given character - int xc = x; - int yc = y; - - float factor = fheight / (float)PIXEL_HEIGHT; - - for (int i = 0; i < len; ++i) - { - char c = text[i]; - if (c == '\n') - { - xc = x; - yc += lheight; - continue; - } - - // only support ASCII - Quad q = getCharQuad(cdata, 512, 512, c - 32); - float s0 = q.x, - s1 = q.x + q.w, - t0 = q.y, - t1 = q.y + q.h; - - // texture quad - float tc[] = { - s0, t1, - s1, t1, - s1, t0, - s0, t0 - }; - - // character bound box - stbtt_bakedchar box = cdata[c - 32]; - - float width = factor * (box.x1 - box.x0); - float height = factor * (box.y1 - box.y0); - float xoffset = factor * box.xoff; - // I don't know why add PIXEL_HEIGHT to box.yoff, but - // it works. - float yoffset = factor * (box.yoff + PIXEL_HEIGHT); - float xadvance = factor * box.xadvance; - - // render quad - float vc[] = { - xc + xoffset, yc + height + yoffset, - xc + width + xoffset, yc + height + yoffset, - xc + width + xoffset, yc + yoffset, - xc + xoffset, yc + yoffset - }; - - // forward to next character - xc += xadvance + spacing; - - glTexCoordPointer(2, GL_FLOAT, 0, tc); - glVertexPointer(2, GL_FLOAT, 0, vc); - glDrawArrays(GL_QUADS, 0, 4); - } - - glDisableClientState(GL_TEXTURE_COORD_ARRAY); - glDisableClientState(GL_VERTEX_ARRAY); - - glBindTexture(GL_TEXTURE_2D, 0); - glDisable(GL_TEXTURE_2D); - } - - void Font::box(const char* str, int fheight, int spacing, int lheight, int* w, int * h) - { - int len = strlen(str); - - float xc = 0; - int yc = len ? lheight: 0; - int maxX = 0; - - float factor = fheight / (float)PIXEL_HEIGHT; - - for (int i = 0; i < len; ++i) - { - char c = str[i]; - if (c == '\n') - { - yc += lheight; - xc = 0; - continue; - } - stbtt_bakedchar box = cdata[c - 32]; - - xc += factor * box.xadvance + spacing; - if (xc > maxX) maxX = xc; - } - - *w = maxX; - *h = yc; - } - -} -}
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