Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gl.c @ 1269:905d5b482f2a
Some explanation on why SDL_RWFromFP doesn't always work on Win32
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 26 Jan 2006 06:10:34 +0000 |
| parents | ff73ee89ff4b |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 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. | |
| 9 | |
| 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. | |
| 14 | |
| 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 | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdlib.h> /* For getenv() prototype */ | |
| 29 #include <string.h> | |
| 30 | |
| 31 #include "SDL_events_c.h" | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_x11video.h" | |
| 34 #include "SDL_x11dga_c.h" | |
| 35 #include "SDL_x11gl_c.h" | |
| 36 | |
|
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37 #if defined(sgi) |
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38 /* IRIX doesn't have a GL library versioning system */ |
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39 #define DEFAULT_OPENGL "libGL.so" |
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40 #elif defined(MACOSX) |
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41 #define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib" |
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42 #else |
| 0 | 43 #define DEFAULT_OPENGL "libGL.so.1" |
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44 #endif |
| 0 | 45 |
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46 #ifndef GLX_ARB_multisample |
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47 #define GLX_ARB_multisample |
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48 #define GLX_SAMPLE_BUFFERS_ARB 100000 |
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49 #define GLX_SAMPLES_ARB 100001 |
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50 #endif |
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51 |
| 0 | 52 /* return the preferred visual to use for openGL graphics */ |
| 53 XVisualInfo *X11_GL_GetVisual(_THIS) | |
| 54 { | |
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55 #ifdef HAVE_OPENGL_X11 |
| 0 | 56 /* 64 seems nice. */ |
| 57 int attribs[64]; | |
| 58 int i; | |
| 59 | |
| 60 /* load the gl driver from a default path */ | |
| 61 if ( ! this->gl_config.driver_loaded ) { | |
| 62 /* no driver has been loaded, use default (ourselves) */ | |
| 63 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { | |
| 64 return NULL; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 /* See if we already have a window which we must use */ | |
| 69 if ( SDL_windowid ) { | |
| 70 XWindowAttributes a; | |
| 71 XVisualInfo vi_in; | |
| 72 int out_count; | |
| 73 | |
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74 pXGetWindowAttributes(SDL_Display, SDL_Window, &a); |
| 0 | 75 vi_in.screen = SDL_Screen; |
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76 vi_in.visualid = pXVisualIDFromVisual(a.visual); |
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77 glx_visualinfo = pXGetVisualInfo(SDL_Display, |
| 0 | 78 VisualScreenMask|VisualIDMask, &vi_in, &out_count); |
| 79 return glx_visualinfo; | |
| 80 } | |
| 81 | |
| 82 /* Setup our GLX attributes according to the gl_config. */ | |
|
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83 i = 0; |
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84 attribs[i++] = GLX_RGBA; |
| 0 | 85 attribs[i++] = GLX_RED_SIZE; |
| 86 attribs[i++] = this->gl_config.red_size; | |
| 87 attribs[i++] = GLX_GREEN_SIZE; | |
| 88 attribs[i++] = this->gl_config.green_size; | |
| 89 attribs[i++] = GLX_BLUE_SIZE; | |
| 90 attribs[i++] = this->gl_config.blue_size; | |
| 91 | |
| 92 if( this->gl_config.alpha_size ) { | |
| 93 attribs[i++] = GLX_ALPHA_SIZE; | |
| 94 attribs[i++] = this->gl_config.alpha_size; | |
| 95 } | |
| 96 | |
| 97 if( this->gl_config.buffer_size ) { | |
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98 attribs[i++] = GLX_BUFFER_SIZE; |
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99 attribs[i++] = this->gl_config.buffer_size; |
| 0 | 100 } |
| 101 | |
| 102 if( this->gl_config.double_buffer ) { | |
| 103 attribs[i++] = GLX_DOUBLEBUFFER; | |
| 104 } | |
| 105 | |
| 106 attribs[i++] = GLX_DEPTH_SIZE; | |
| 107 attribs[i++] = this->gl_config.depth_size; | |
| 108 | |
| 109 if( this->gl_config.stencil_size ) { | |
| 110 attribs[i++] = GLX_STENCIL_SIZE; | |
| 111 attribs[i++] = this->gl_config.stencil_size; | |
| 112 } | |
| 113 | |
| 114 if( this->gl_config.accum_red_size ) { | |
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115 attribs[i++] = GLX_ACCUM_RED_SIZE; |
| 0 | 116 attribs[i++] = this->gl_config.accum_red_size; |
| 117 } | |
| 118 | |
| 119 if( this->gl_config.accum_green_size ) { | |
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120 attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| 0 | 121 attribs[i++] = this->gl_config.accum_green_size; |
| 122 } | |
| 123 | |
| 124 if( this->gl_config.accum_blue_size ) { | |
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125 attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| 0 | 126 attribs[i++] = this->gl_config.accum_blue_size; |
| 127 } | |
| 128 | |
| 129 if( this->gl_config.accum_alpha_size ) { | |
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130 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| 0 | 131 attribs[i++] = this->gl_config.accum_alpha_size; |
| 132 } | |
| 133 | |
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134 if( this->gl_config.stereo ) { |
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135 attribs[i++] = GLX_STEREO; |
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136 attribs[i++] = this->gl_config.stereo; |
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137 } |
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138 |
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139 if( this->gl_config.multisamplebuffers ) { |
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140 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
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141 attribs[i++] = this->gl_config.multisamplebuffers; |
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142 } |
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143 |
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144 if( this->gl_config.multisamplesamples ) { |
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145 attribs[i++] = GLX_SAMPLES_ARB; |
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146 attribs[i++] = this->gl_config.multisamplesamples; |
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147 } |
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148 |
| 0 | 149 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
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150 if ( !getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { |
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151 attribs[i++] = GLX_X_VISUAL_TYPE; |
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152 attribs[i++] = GLX_DIRECT_COLOR; |
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153 } |
| 0 | 154 #endif |
| 155 attribs[i++] = None; | |
| 156 | |
| 157 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 158 SDL_Screen, attribs); | |
| 159 #ifdef GLX_DIRECT_COLOR | |
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160 if( !glx_visualinfo && !getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */ |
| 0 | 161 attribs[i-3] = None; |
| 162 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 163 SDL_Screen, attribs); | |
| 164 } | |
| 165 #endif | |
| 166 if( !glx_visualinfo ) { | |
| 167 SDL_SetError( "Couldn't find matching GLX visual"); | |
| 168 return NULL; | |
| 169 } | |
| 170 return glx_visualinfo; | |
| 171 #else | |
| 172 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 173 return NULL; | |
| 174 #endif | |
| 175 } | |
| 176 | |
| 177 int X11_GL_CreateWindow(_THIS, int w, int h) | |
| 178 { | |
| 179 int retval; | |
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180 #ifdef HAVE_OPENGL_X11 |
| 0 | 181 XSetWindowAttributes attributes; |
| 182 unsigned long mask; | |
| 183 unsigned long black; | |
| 184 | |
| 185 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, | |
| 186 SDL_Screen)) | |
| 187 ? BlackPixel(SDL_Display, SDL_Screen) : 0; | |
| 188 attributes.background_pixel = black; | |
| 189 attributes.border_pixel = black; | |
| 190 attributes.colormap = SDL_XColorMap; | |
| 191 mask = CWBackPixel | CWBorderPixel | CWColormap; | |
| 192 | |
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193 SDL_Window = pXCreateWindow(SDL_Display, WMwindow, |
| 0 | 194 0, 0, w, h, 0, glx_visualinfo->depth, |
| 195 InputOutput, glx_visualinfo->visual, | |
| 196 mask, &attributes); | |
| 197 if ( !SDL_Window ) { | |
| 198 SDL_SetError("Could not create window"); | |
| 199 return -1; | |
| 200 } | |
| 201 retval = 0; | |
| 202 #else | |
| 203 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 204 retval = -1; | |
| 205 #endif | |
| 206 return(retval); | |
| 207 } | |
| 208 | |
| 209 int X11_GL_CreateContext(_THIS) | |
| 210 { | |
| 211 int retval; | |
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212 #ifdef HAVE_OPENGL_X11 |
| 0 | 213 /* We do this to create a clean separation between X and GLX errors. */ |
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214 pXSync( SDL_Display, False ); |
| 0 | 215 glx_context = this->gl_data->glXCreateContext(GFX_Display, |
| 216 glx_visualinfo, NULL, True); | |
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217 pXSync( GFX_Display, False ); |
| 0 | 218 |
| 219 if (glx_context == NULL) { | |
| 220 SDL_SetError("Could not create GL context"); | |
| 221 return -1; | |
| 222 } | |
| 223 | |
| 224 gl_active = 1; | |
| 225 #else | |
| 226 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 227 #endif | |
| 228 if ( gl_active ) { | |
| 229 retval = 0; | |
| 230 } else { | |
| 231 retval = -1; | |
| 232 } | |
| 233 return(retval); | |
| 234 } | |
| 235 | |
| 236 void X11_GL_Shutdown(_THIS) | |
| 237 { | |
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238 #ifdef HAVE_OPENGL_X11 |
| 0 | 239 /* Clean up OpenGL */ |
| 240 if( glx_context ) { | |
| 241 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); | |
| 242 | |
| 243 if (glx_context != NULL) | |
| 244 this->gl_data->glXDestroyContext(GFX_Display, glx_context); | |
| 245 | |
| 246 if( this->gl_data->glXReleaseBuffersMESA ) { | |
| 247 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window); | |
| 248 } | |
| 249 glx_context = NULL; | |
| 250 } | |
| 251 gl_active = 0; | |
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252 #endif /* HAVE_OPENGL_X11 */ |
| 0 | 253 } |
| 254 | |
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255 #ifdef HAVE_OPENGL_X11 |
| 0 | 256 |
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257 static int ExtensionSupported(const char *extension) |
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258 { |
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259 const GLubyte *extensions = NULL; |
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260 const GLubyte *start; |
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261 GLubyte *where, *terminator; |
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262 |
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263 /* Extension names should not have spaces. */ |
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264 where = (GLubyte *) strchr(extension, ' '); |
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265 if (where || *extension == '\0') |
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266 return 0; |
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267 |
|
643
564716cfb502
Removed direct dependency on OpenGL (call current_video->glGetString() instead
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268 extensions = current_video->glGetString(GL_EXTENSIONS); |
|
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269 /* It takes a bit of care to be fool-proof about parsing the |
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270 * OpenGL extensions string. Don't be fooled by sub-strings, |
|
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271 * etc. */ |
|
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272 |
|
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273 start = extensions; |
|
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274 |
|
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275 for (;;) |
|
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276 { |
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277 where = (GLubyte *) strstr((const char *) start, extension); |
|
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278 if (!where) break; |
|
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279 |
|
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280 terminator = where + strlen(extension); |
|
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281 if (where == start || *(where - 1) == ' ') |
|
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282 if (*terminator == ' ' || *terminator == '\0') return 1; |
|
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283 |
|
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284 start = terminator; |
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285 } |
|
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286 |
|
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287 return 0; |
|
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288 } |
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289 |
| 0 | 290 /* Make the current context active */ |
| 291 int X11_GL_MakeCurrent(_THIS) | |
| 292 { | |
| 293 int retval; | |
|
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294 |
| 0 | 295 retval = 0; |
| 296 if ( ! this->gl_data->glXMakeCurrent(GFX_Display, | |
| 297 SDL_Window, glx_context) ) { | |
| 298 SDL_SetError("Unable to make GL context current"); | |
| 299 retval = -1; | |
| 300 } | |
|
1168
045f186426e1
Dynamically load X11 libraries like we currently do for alsa, esd, etc.
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301 pXSync( GFX_Display, False ); |
| 0 | 302 |
|
638
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303 /* |
|
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304 * The context is now current, check for glXReleaseBuffersMESA() |
|
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305 * extension. If extension is _not_ supported, destroy the pointer |
|
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306 * (to make sure it will not be called in X11_GL_Shutdown() ). |
|
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307 * |
|
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308 * DRI/Mesa drivers include glXReleaseBuffersMESA() in the libGL.so, |
|
b0108e9dea53
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309 * but there's no need to call it (is is only needed for some old |
|
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310 * non-DRI drivers). |
|
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311 * |
|
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312 * When using for example glew (http://glew.sf.net), dlsym() for |
|
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313 * glXReleaseBuffersMESA() returns the pointer from the glew library |
|
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314 * (namespace conflict). |
|
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315 * |
|
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316 * The glXReleaseBuffersMESA() pointer in the glew is NULL, if the |
|
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317 * driver doesn't support this extension. So blindly calling it will |
|
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318 * cause segfault with DRI/Mesa drivers! |
|
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319 * |
|
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320 */ |
|
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321 |
|
655
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322 if ( ! ExtensionSupported("glXReleaseBuffersMESA") ) { |
|
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323 this->gl_data->glXReleaseBuffersMESA = NULL; |
|
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324 } |
|
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325 |
| 0 | 326 /* More Voodoo X server workarounds... Grr... */ |
| 327 SDL_Lock_EventThread(); | |
| 328 X11_CheckDGAMouse(this); | |
| 329 SDL_Unlock_EventThread(); | |
| 330 | |
| 331 return(retval); | |
| 332 } | |
| 333 | |
| 334 /* Get attribute data from glX. */ | |
| 335 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
| 336 { | |
| 337 int retval; | |
| 338 int glx_attrib = None; | |
| 339 | |
| 340 switch( attrib ) { | |
| 341 case SDL_GL_RED_SIZE: | |
| 342 glx_attrib = GLX_RED_SIZE; | |
| 343 break; | |
| 344 case SDL_GL_GREEN_SIZE: | |
| 345 glx_attrib = GLX_GREEN_SIZE; | |
| 346 break; | |
| 347 case SDL_GL_BLUE_SIZE: | |
| 348 glx_attrib = GLX_BLUE_SIZE; | |
| 349 break; | |
| 350 case SDL_GL_ALPHA_SIZE: | |
| 351 glx_attrib = GLX_ALPHA_SIZE; | |
| 352 break; | |
| 353 case SDL_GL_DOUBLEBUFFER: | |
| 354 glx_attrib = GLX_DOUBLEBUFFER; | |
| 355 break; | |
| 356 case SDL_GL_BUFFER_SIZE: | |
| 357 glx_attrib = GLX_BUFFER_SIZE; | |
| 358 break; | |
| 359 case SDL_GL_DEPTH_SIZE: | |
| 360 glx_attrib = GLX_DEPTH_SIZE; | |
| 361 break; | |
| 362 case SDL_GL_STENCIL_SIZE: | |
| 363 glx_attrib = GLX_STENCIL_SIZE; | |
| 364 break; | |
| 365 case SDL_GL_ACCUM_RED_SIZE: | |
| 366 glx_attrib = GLX_ACCUM_RED_SIZE; | |
| 367 break; | |
| 368 case SDL_GL_ACCUM_GREEN_SIZE: | |
| 369 glx_attrib = GLX_ACCUM_GREEN_SIZE; | |
| 370 break; | |
| 371 case SDL_GL_ACCUM_BLUE_SIZE: | |
| 372 glx_attrib = GLX_ACCUM_BLUE_SIZE; | |
| 373 break; | |
| 374 case SDL_GL_ACCUM_ALPHA_SIZE: | |
| 375 glx_attrib = GLX_ACCUM_ALPHA_SIZE; | |
| 376 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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|
377 case SDL_GL_STEREO: |
|
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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|
378 glx_attrib = GLX_STEREO; |
|
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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|
379 break; |
|
656
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
Sam Lantinga <slouken@libsdl.org>
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|
380 case SDL_GL_MULTISAMPLEBUFFERS: |
|
655
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|
381 glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
|
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|
382 break; |
|
656
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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|
383 case SDL_GL_MULTISAMPLESAMPLES: |
|
655
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384 glx_attrib = GLX_SAMPLES_ARB; |
|
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385 break; |
| 0 | 386 default: |
| 387 return(-1); | |
| 388 } | |
| 389 | |
| 390 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); | |
| 391 | |
| 392 return retval; | |
| 393 } | |
| 394 | |
| 395 void X11_GL_SwapBuffers(_THIS) | |
| 396 { | |
| 397 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); | |
| 398 } | |
| 399 | |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
400 #endif /* HAVE_OPENGL_X11 */ |
| 0 | 401 |
| 402 void X11_GL_UnloadLibrary(_THIS) | |
| 403 { | |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
404 #ifdef HAVE_OPENGL_X11 |
| 0 | 405 if ( this->gl_config.driver_loaded ) { |
|
1191
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|
406 |
|
2bd4cec0de63
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407 /* !!! FIXME: Can we just use SDL_UnloadObject() everywhere? */ |
|
2bd4cec0de63
Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
408 #ifdef USE_DLOPEN |
| 0 | 409 dlclose(this->gl_config.dll_handle); |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
410 #else |
|
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411 SDL_UnloadObject(this->gl_config.dll_handle); |
|
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|
412 #endif |
| 0 | 413 |
| 414 this->gl_data->glXGetProcAddress = NULL; | |
| 415 this->gl_data->glXChooseVisual = NULL; | |
| 416 this->gl_data->glXCreateContext = NULL; | |
| 417 this->gl_data->glXDestroyContext = NULL; | |
| 418 this->gl_data->glXMakeCurrent = NULL; | |
| 419 this->gl_data->glXSwapBuffers = NULL; | |
| 420 | |
| 421 this->gl_config.dll_handle = NULL; | |
| 422 this->gl_config.driver_loaded = 0; | |
| 423 } | |
| 424 #endif | |
| 425 } | |
| 426 | |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
427 #ifdef HAVE_OPENGL_X11 |
| 0 | 428 |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
429 static void *do_dlsym(void *handle, const char *name) |
|
2bd4cec0de63
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430 { |
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431 /* !!! FIXME: Can we just use SDL_LoadFunction() everywhere? */ |
|
2bd4cec0de63
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432 #ifdef USE_DLOPEN |
|
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433 return dlsym(handle, name); |
|
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434 #else |
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435 return SDL_LoadFunction(handle, name); |
|
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436 #endif |
|
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437 } |
|
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438 |
|
2bd4cec0de63
Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
439 #if defined(__OpenBSD__) && !defined(__ELF__) |
|
2bd4cec0de63
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440 #define do_dlsym(x,y) do_dlsym(x, "_" y) |
|
2bd4cec0de63
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441 #endif |
|
1182
e8e8dcb68e7a
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442 |
| 0 | 443 /* Passing a NULL path means load pointers from the application */ |
| 444 int X11_GL_LoadLibrary(_THIS, const char* path) | |
| 445 { | |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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|
446 void* handle = NULL; |
| 0 | 447 |
|
1182
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448 if ( gl_active ) { |
|
e8e8dcb68e7a
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449 SDL_SetError("OpenGL context already created"); |
|
e8e8dcb68e7a
X11 driver now chooses "libGL.so.1" as a default when a NULL is passed to
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450 return -1; |
|
e8e8dcb68e7a
X11 driver now chooses "libGL.so.1" as a default when a NULL is passed to
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451 } |
|
e8e8dcb68e7a
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452 |
|
e8e8dcb68e7a
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|
453 if ( path == NULL ) { |
| 0 | 454 path = getenv("SDL_VIDEO_GL_DRIVER"); |
| 455 if ( path == NULL ) { | |
| 456 path = DEFAULT_OPENGL; | |
| 457 } | |
|
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458 } |
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459 |
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460 /* !!! FIXME: Can we just use SDL_LoadObject() everywhere? */ |
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461 #ifdef USE_DLOPEN |
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462 { |
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463 #ifdef RTLD_GLOBAL |
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464 int dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; |
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465 #else |
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466 int dlopen_flags = RTLD_LAZY; |
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467 #endif |
| 0 | 468 handle = dlopen(path, dlopen_flags); |
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469 if ( handle == NULL ) { |
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470 SDL_SetError("Could not load OpenGL library: %s", (const char *) dlerror()); |
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471 return -1; |
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472 } |
| 0 | 473 } |
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474 #else |
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475 handle = SDL_LoadObject(path); |
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476 if ( handle == NULL ) { |
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477 /* SDL_LoadObject() will call SDL_SetError() for us. */ |
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478 return -1; |
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479 } |
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480 #endif |
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481 |
| 0 | 482 |
| 483 /* Unload the old driver and reset the pointers */ | |
| 484 X11_GL_UnloadLibrary(this); | |
| 485 | |
| 486 /* Load new function pointers */ | |
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487 this->gl_data->glXGetProcAddress = |
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488 (void *(*)(const GLubyte *)) do_dlsym(handle, "glXGetProcAddressARB"); |
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489 this->gl_data->glXChooseVisual = |
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490 (XVisualInfo *(*)(Display *, int, int *)) do_dlsym(handle, "glXChooseVisual"); |
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491 this->gl_data->glXCreateContext = |
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492 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) do_dlsym(handle, "glXCreateContext"); |
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493 this->gl_data->glXDestroyContext = |
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494 (void (*)(Display *, GLXContext)) do_dlsym(handle, "glXDestroyContext"); |
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495 this->gl_data->glXMakeCurrent = |
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496 (int (*)(Display *, GLXDrawable, GLXContext)) do_dlsym(handle, "glXMakeCurrent"); |
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497 this->gl_data->glXSwapBuffers = |
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498 (void (*)(Display *, GLXDrawable)) do_dlsym(handle, "glXSwapBuffers"); |
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499 this->gl_data->glXGetConfig = |
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500 (int (*)(Display *, XVisualInfo *, int, int *)) do_dlsym(handle, "glXGetConfig"); |
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501 this->gl_data->glXQueryExtensionsString = |
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502 (const char *(*)(Display *, int)) do_dlsym(handle, "glXQueryExtensionsString"); |
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503 |
| 0 | 504 /* We don't compare below for this in case we're not using Mesa. */ |
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505 this->gl_data->glXReleaseBuffersMESA = |
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506 (void (*)(Display *, GLXDrawable)) do_dlsym( handle, "glXReleaseBuffersMESA" ); |
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507 |
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508 |
| 0 | 509 if ( (this->gl_data->glXChooseVisual == NULL) || |
| 510 (this->gl_data->glXCreateContext == NULL) || | |
| 511 (this->gl_data->glXDestroyContext == NULL) || | |
| 512 (this->gl_data->glXMakeCurrent == NULL) || | |
| 513 (this->gl_data->glXSwapBuffers == NULL) || | |
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514 (this->gl_data->glXGetConfig == NULL) || |
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515 (this->gl_data->glXQueryExtensionsString == NULL)) { |
| 0 | 516 SDL_SetError("Could not retrieve OpenGL functions"); |
| 517 return -1; | |
| 518 } | |
| 519 | |
| 520 this->gl_config.dll_handle = handle; | |
| 521 this->gl_config.driver_loaded = 1; | |
| 522 if ( path ) { | |
| 523 strncpy(this->gl_config.driver_path, path, | |
| 524 sizeof(this->gl_config.driver_path)-1); | |
| 525 } else { | |
| 526 strcpy(this->gl_config.driver_path, ""); | |
| 527 } | |
| 528 return 0; | |
| 529 } | |
| 530 | |
| 531 void *X11_GL_GetProcAddress(_THIS, const char* proc) | |
| 532 { | |
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533 static char procname[1024]; |
| 0 | 534 void* handle; |
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535 void* retval; |
| 0 | 536 |
| 537 handle = this->gl_config.dll_handle; | |
| 538 if ( this->gl_data->glXGetProcAddress ) { | |
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539 return this->gl_data->glXGetProcAddress((const GLubyte *)proc); |
| 0 | 540 } |
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541 #if defined(__OpenBSD__) && !defined(__ELF__) |
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542 #undef do_dlsym |
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543 #endif |
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544 retval = do_dlsym(handle, proc); |
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545 if (!retval && strlen(proc) <= 1022) { |
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546 procname[0] = '_'; |
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547 strcpy(procname + 1, proc); |
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548 retval = do_dlsym(handle, procname); |
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549 } |
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550 return retval; |
| 0 | 551 } |
| 552 | |
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553 #endif /* HAVE_OPENGL_X11 */ |