2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "SDL_config.h"
24 #define DEBUG_DYNAMIC_X11 0
26 #include "SDL_x11dyn.h"
32 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
35 #include "SDL_loadso.h"
43 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC
44 #define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL
46 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT
47 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL
49 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER
50 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER NULL
52 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
53 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL
56 static x11dynlib x11libs[] =
58 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC },
59 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT },
60 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER },
61 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR },
64 static void X11_GetSym(const char *fnname, int *rc, void **fn)
67 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
68 if (x11libs[i].lib != NULL)
70 *fn = SDL_LoadFunction(x11libs[i].lib, fnname);
78 printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname, *fn);
80 printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
84 *rc = 0; /* kill this module. */
88 /* Define all the function pointers and wrappers... */
89 #define SDL_X11_MODULE(modname)
90 #define SDL_X11_SYM(rc,fn,params,args,ret) \
91 static rc (*p##fn) params = NULL; \
92 rc fn params { ret p##fn args ; }
93 #include "SDL_x11sym.h"
96 #endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */
98 /* Annoying varargs entry point... */
99 #ifdef X_HAVE_UTF8_STRING
100 XIC (*pXCreateIC)(XIM,...) = NULL;
101 char *(*pXGetICValues)(XIC, ...) = NULL;
104 /* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
105 #define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 1;
106 #define SDL_X11_SYM(rc,fn,params,args,ret)
107 #include "SDL_x11sym.h"
108 #undef SDL_X11_MODULE
112 static void *SDL_XGetRequest_workaround(Display* dpy, CARD8 type, size_t len)
116 if (dpy->bufptr + len > dpy->bufmax)
118 dpy->last_req = dpy->bufptr;
119 req = (xReq*)dpy->bufptr;
121 req->length = len / 4;
127 static int x11_load_refcount = 0;
129 void SDL_X11_UnloadSymbols(void)
131 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
132 /* Don't actually unload if more than one module is using the libs... */
133 if (x11_load_refcount > 0) {
134 if (--x11_load_refcount == 0) {
137 /* set all the function pointers to NULL. */
138 #define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1;
139 #define SDL_X11_SYM(rc,fn,params,args,ret) p##fn = NULL;
140 #include "SDL_x11sym.h"
141 #undef SDL_X11_MODULE
144 #ifdef X_HAVE_UTF8_STRING
146 pXGetICValues = NULL;
149 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
150 if (x11libs[i].lib != NULL) {
151 SDL_UnloadObject(x11libs[i].lib);
152 x11libs[i].lib = NULL;
160 /* returns non-zero if all needed symbols were loaded. */
161 int SDL_X11_LoadSymbols(void)
163 int rc = 1; /* always succeed if not using Dynamic X11 stuff. */
165 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
166 /* deal with multiple modules (dga, x11, etc) needing these symbols... */
167 if (x11_load_refcount++ == 0) {
170 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
171 if (x11libs[i].libname != NULL) {
172 x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
175 #define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
176 #define SDL_X11_SYM(a,fn,x,y,z) X11_GetSym(#fn,thismod,(void**)&p##fn);
177 #include "SDL_x11sym.h"
178 #undef SDL_X11_MODULE
181 #ifdef X_HAVE_UTF8_STRING
182 X11_GetSym("XCreateIC",&SDL_X11_HAVE_UTF8,(void **)&pXCreateIC);
183 X11_GetSym("XGetICValues",&SDL_X11_HAVE_UTF8,(void **)&pXGetICValues);
187 * In case we're built with newer Xlib headers, we need to make sure
188 * that _XGetRequest() is available, even on older systems.
189 * Otherwise, various Xlib macros we use will call a NULL pointer.
191 if (!SDL_X11_HAVE_XGETREQUEST) {
192 p_XGetRequest = SDL_XGetRequest_workaround;
195 if (SDL_X11_HAVE_BASEXLIB) { /* all required symbols loaded. */
198 SDL_X11_UnloadSymbols(); /* in case something got loaded... */
203 #if DEBUG_DYNAMIC_X11
204 printf("X11: No dynamic X11 support in this build of SDL.\n");
206 #ifdef X_HAVE_UTF8_STRING
207 pXCreateIC = XCreateIC;
208 pXGetICValues = XGetICValues;
215 /* end of SDL_x11dyn.c ... */