diff options
Diffstat (limited to 'Source/external/SDL2/src/video/x11/SDL_x11dyn.c')
| -rw-r--r-- | Source/external/SDL2/src/video/x11/SDL_x11dyn.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/video/x11/SDL_x11dyn.c b/Source/external/SDL2/src/video/x11/SDL_x11dyn.c new file mode 100644 index 0000000..89f736a --- /dev/null +++ b/Source/external/SDL2/src/video/x11/SDL_x11dyn.c @@ -0,0 +1,212 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" + +#if SDL_VIDEO_DRIVER_X11 + +#define DEBUG_DYNAMIC_X11 0 + +#include "SDL_x11dyn.h" + +#if DEBUG_DYNAMIC_X11 +#include <stdio.h> +#endif + +#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC + +#include "SDL_name.h" +#include "SDL_loadso.h" + +typedef struct +{ + void *lib; + const char *libname; +} x11dynlib; + +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC +#define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS NULL +#endif +#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE +#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE NULL +#endif + +static x11dynlib x11libs[] = { + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS}, + {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE} +}; + +static void * +X11_GetSym(const char *fnname, int *pHasModule) +{ + int i; + void *fn = NULL; + for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { + if (x11libs[i].lib != NULL) { + fn = SDL_LoadFunction(x11libs[i].lib, fnname); + if (fn != NULL) + break; + } + } + +#if DEBUG_DYNAMIC_X11 + if (fn != NULL) + printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname, fn); + else + printf("X11: Symbol '%s' NOT FOUND!\n", fnname); +#endif + + if (fn == NULL) + *pHasModule = 0; /* kill this module. */ + + return fn; +} + +#endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */ + +/* Define all the function pointers and wrappers... */ +#define SDL_X11_SYM(rc,fn,params,args,ret) SDL_DYNX11FN_##fn X11_##fn = NULL; +#include "SDL_x11sym.h" + +/* Annoying varargs entry point... */ +#ifdef X_HAVE_UTF8_STRING +SDL_DYNX11FN_XCreateIC X11_XCreateIC = NULL; +SDL_DYNX11FN_XGetICValues X11_XGetICValues = NULL; +#endif + +/* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */ +#define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 0; +#include "SDL_x11sym.h" + +static int x11_load_refcount = 0; + +void +SDL_X11_UnloadSymbols(void) +{ + /* Don't actually unload if more than one module is using the libs... */ + if (x11_load_refcount > 0) { + if (--x11_load_refcount == 0) { + int i; + + /* set all the function pointers to NULL. */ +#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 0; +#define SDL_X11_SYM(rc,fn,params,args,ret) X11_##fn = NULL; +#include "SDL_x11sym.h" + +#ifdef X_HAVE_UTF8_STRING + X11_XCreateIC = NULL; + X11_XGetICValues = NULL; +#endif + +#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC + for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { + if (x11libs[i].lib != NULL) { + SDL_UnloadObject(x11libs[i].lib); + x11libs[i].lib = NULL; + } + } +#endif + } + } +} + +/* returns non-zero if all needed symbols were loaded. */ +int +SDL_X11_LoadSymbols(void) +{ + int rc = 1; /* always succeed if not using Dynamic X11 stuff. */ + + /* deal with multiple modules (dga, x11, etc) needing these symbols... */ + if (x11_load_refcount++ == 0) { +#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC + int i; + int *thismod = NULL; + for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { + if (x11libs[i].libname != NULL) { + x11libs[i].lib = SDL_LoadObject(x11libs[i].libname); + } + } + +#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; /* default yes */ +#include "SDL_x11sym.h" + +#define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname; +#define SDL_X11_SYM(a,fn,x,y,z) X11_##fn = (SDL_DYNX11FN_##fn) X11_GetSym(#fn,thismod); +#include "SDL_x11sym.h" + +#ifdef X_HAVE_UTF8_STRING + X11_XCreateIC = (SDL_DYNX11FN_XCreateIC) + X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8); + X11_XGetICValues = (SDL_DYNX11FN_XGetICValues) + X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8); +#endif + + if (SDL_X11_HAVE_BASEXLIB) { + /* all required symbols loaded. */ + SDL_ClearError(); + } else { + /* in case something got loaded... */ + SDL_X11_UnloadSymbols(); + rc = 0; + } + +#else /* no dynamic X11 */ + +#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; /* default yes */ +#define SDL_X11_SYM(a,fn,x,y,z) X11_##fn = (SDL_DYNX11FN_##fn) fn; +#include "SDL_x11sym.h" + +#ifdef X_HAVE_UTF8_STRING + X11_XCreateIC = XCreateIC; + X11_XGetICValues = XGetICValues; +#endif +#endif + } + + return rc; +} + +#endif /* SDL_VIDEO_DRIVER_X11 */ + +/* vi: set ts=4 sw=4 expandtab: */ |