Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gl.c @ 821:30168104389f
Date: Sat, 14 Feb 2004 14:52:40 +0200
From: "Mike Gorchak"
Subject: Batch of the QNX6 fixes for the SDL
1. Updated readme.QNX
2. Fixed crashes during intensive window updating under fast machines (got over 200 rectangles for update).
3. Fixed double-buffered fullscreen modes, now it works as needed.
4. Fixed Photon detection algorithm.
5. Fixed HWSURFACE update function.
6. Added SDL_PHOTON_FULLSCREEN_REFRESH environment variable support for control refresh rates under Photon.
7. Added 640x400 fullscreen mode emulation via 640x480 (if videodriver not supports original 640x400 mode of course) shifted by 40 vertical pixels from begin, to center it. It's needed for some old DOS games which ran in doubled 320x200 mode.
8. Added available video ram amount support.
8. Added hardware surface allocation/deallocation support if current videomode and videodriver supports it.
9. Added hardware filling support.
10. Added hardware blits support (simple and colorkeyed).
And I've added to testvidinfo test color-keyed blits benchmark (maybe need to add alpha blits benchmark too ?). Currently Photon not supporting any alpha hardware blittings (all drivers lack of alpha blitting code support, only software alpha blitting exist in photon, which is hundreds times slowest than the SDL's one). So I've not added the alpha support. I suppose new QNX 6.3 will have the hardware alpha support, so when it will be done, I'll add alpha support.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 14 Feb 2004 20:22:21 +0000 |
| parents | b8d311d90021 |
| children | f7a8b0ca2ae3 |
| 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 | |
| 37 #define DEFAULT_OPENGL "libGL.so.1" | |
| 38 | |
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39 #ifndef GLX_ARB_multisample |
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40 #define GLX_ARB_multisample |
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41 #define GLX_SAMPLE_BUFFERS_ARB 100000 |
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42 #define GLX_SAMPLES_ARB 100001 |
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43 #endif |
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44 |
| 0 | 45 /* return the preferred visual to use for openGL graphics */ |
| 46 XVisualInfo *X11_GL_GetVisual(_THIS) | |
| 47 { | |
| 48 #ifdef HAVE_OPENGL | |
| 49 /* 64 seems nice. */ | |
| 50 int attribs[64]; | |
| 51 int i; | |
| 52 | |
| 53 /* load the gl driver from a default path */ | |
| 54 if ( ! this->gl_config.driver_loaded ) { | |
| 55 /* no driver has been loaded, use default (ourselves) */ | |
| 56 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { | |
| 57 return NULL; | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 /* See if we already have a window which we must use */ | |
| 62 if ( SDL_windowid ) { | |
| 63 XWindowAttributes a; | |
| 64 XVisualInfo vi_in; | |
| 65 int out_count; | |
| 66 | |
| 67 XGetWindowAttributes(SDL_Display, SDL_Window, &a); | |
| 68 vi_in.screen = SDL_Screen; | |
| 69 vi_in.visualid = XVisualIDFromVisual(a.visual); | |
| 70 glx_visualinfo = XGetVisualInfo(SDL_Display, | |
| 71 VisualScreenMask|VisualIDMask, &vi_in, &out_count); | |
| 72 return glx_visualinfo; | |
| 73 } | |
| 74 | |
| 75 /* Setup our GLX attributes according to the gl_config. */ | |
|
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76 i = 0; |
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77 attribs[i++] = GLX_RGBA; |
| 0 | 78 attribs[i++] = GLX_RED_SIZE; |
| 79 attribs[i++] = this->gl_config.red_size; | |
| 80 attribs[i++] = GLX_GREEN_SIZE; | |
| 81 attribs[i++] = this->gl_config.green_size; | |
| 82 attribs[i++] = GLX_BLUE_SIZE; | |
| 83 attribs[i++] = this->gl_config.blue_size; | |
| 84 | |
| 85 if( this->gl_config.alpha_size ) { | |
| 86 attribs[i++] = GLX_ALPHA_SIZE; | |
| 87 attribs[i++] = this->gl_config.alpha_size; | |
| 88 } | |
| 89 | |
| 90 if( this->gl_config.buffer_size ) { | |
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91 attribs[i++] = GLX_BUFFER_SIZE; |
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92 attribs[i++] = this->gl_config.buffer_size; |
| 0 | 93 } |
| 94 | |
| 95 if( this->gl_config.double_buffer ) { | |
| 96 attribs[i++] = GLX_DOUBLEBUFFER; | |
| 97 } | |
| 98 | |
| 99 attribs[i++] = GLX_DEPTH_SIZE; | |
| 100 attribs[i++] = this->gl_config.depth_size; | |
| 101 | |
| 102 if( this->gl_config.stencil_size ) { | |
| 103 attribs[i++] = GLX_STENCIL_SIZE; | |
| 104 attribs[i++] = this->gl_config.stencil_size; | |
| 105 } | |
| 106 | |
| 107 if( this->gl_config.accum_red_size ) { | |
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108 attribs[i++] = GLX_ACCUM_RED_SIZE; |
| 0 | 109 attribs[i++] = this->gl_config.accum_red_size; |
| 110 } | |
| 111 | |
| 112 if( this->gl_config.accum_green_size ) { | |
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113 attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| 0 | 114 attribs[i++] = this->gl_config.accum_green_size; |
| 115 } | |
| 116 | |
| 117 if( this->gl_config.accum_blue_size ) { | |
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118 attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| 0 | 119 attribs[i++] = this->gl_config.accum_blue_size; |
| 120 } | |
| 121 | |
| 122 if( this->gl_config.accum_alpha_size ) { | |
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123 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| 0 | 124 attribs[i++] = this->gl_config.accum_alpha_size; |
| 125 } | |
| 126 | |
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127 if( this->gl_config.stereo ) { |
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128 attribs[i++] = GLX_STEREO; |
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129 attribs[i++] = this->gl_config.stereo; |
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130 } |
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131 |
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132 if( this->gl_config.multisamplebuffers ) { |
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133 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
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134 attribs[i++] = this->gl_config.multisamplebuffers; |
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135 } |
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136 |
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137 if( this->gl_config.multisamplesamples ) { |
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138 attribs[i++] = GLX_SAMPLES_ARB; |
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139 attribs[i++] = this->gl_config.multisamplesamples; |
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140 } |
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141 |
| 0 | 142 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
| 143 attribs[i++] = GLX_X_VISUAL_TYPE; | |
| 144 attribs[i++] = GLX_DIRECT_COLOR; | |
| 145 #endif | |
| 146 attribs[i++] = None; | |
| 147 | |
| 148 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 149 SDL_Screen, attribs); | |
| 150 #ifdef GLX_DIRECT_COLOR | |
| 151 if( !glx_visualinfo ) { /* No DirectColor visual? Try again.. */ | |
| 152 attribs[i-3] = None; | |
| 153 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 154 SDL_Screen, attribs); | |
| 155 } | |
| 156 #endif | |
| 157 if( !glx_visualinfo ) { | |
| 158 SDL_SetError( "Couldn't find matching GLX visual"); | |
| 159 return NULL; | |
| 160 } | |
| 161 return glx_visualinfo; | |
| 162 #else | |
| 163 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 164 return NULL; | |
| 165 #endif | |
| 166 } | |
| 167 | |
| 168 int X11_GL_CreateWindow(_THIS, int w, int h) | |
| 169 { | |
| 170 int retval; | |
| 171 #ifdef HAVE_OPENGL | |
| 172 XSetWindowAttributes attributes; | |
| 173 unsigned long mask; | |
| 174 unsigned long black; | |
| 175 | |
| 176 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, | |
| 177 SDL_Screen)) | |
| 178 ? BlackPixel(SDL_Display, SDL_Screen) : 0; | |
| 179 attributes.background_pixel = black; | |
| 180 attributes.border_pixel = black; | |
| 181 attributes.colormap = SDL_XColorMap; | |
| 182 mask = CWBackPixel | CWBorderPixel | CWColormap; | |
| 183 | |
| 184 SDL_Window = XCreateWindow(SDL_Display, WMwindow, | |
| 185 0, 0, w, h, 0, glx_visualinfo->depth, | |
| 186 InputOutput, glx_visualinfo->visual, | |
| 187 mask, &attributes); | |
| 188 if ( !SDL_Window ) { | |
| 189 SDL_SetError("Could not create window"); | |
| 190 return -1; | |
| 191 } | |
| 192 retval = 0; | |
| 193 #else | |
| 194 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 195 retval = -1; | |
| 196 #endif | |
| 197 return(retval); | |
| 198 } | |
| 199 | |
| 200 int X11_GL_CreateContext(_THIS) | |
| 201 { | |
| 202 int retval; | |
| 203 #ifdef HAVE_OPENGL | |
| 204 /* We do this to create a clean separation between X and GLX errors. */ | |
| 205 XSync( SDL_Display, False ); | |
| 206 glx_context = this->gl_data->glXCreateContext(GFX_Display, | |
| 207 glx_visualinfo, NULL, True); | |
| 208 XSync( GFX_Display, False ); | |
| 209 | |
| 210 if (glx_context == NULL) { | |
| 211 SDL_SetError("Could not create GL context"); | |
| 212 return -1; | |
| 213 } | |
| 214 | |
| 215 gl_active = 1; | |
| 216 #else | |
| 217 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 218 #endif | |
| 219 if ( gl_active ) { | |
| 220 retval = 0; | |
| 221 } else { | |
| 222 retval = -1; | |
| 223 } | |
| 224 return(retval); | |
| 225 } | |
| 226 | |
| 227 void X11_GL_Shutdown(_THIS) | |
| 228 { | |
| 229 #ifdef HAVE_OPENGL | |
| 230 /* Clean up OpenGL */ | |
| 231 if( glx_context ) { | |
| 232 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); | |
| 233 | |
| 234 if (glx_context != NULL) | |
| 235 this->gl_data->glXDestroyContext(GFX_Display, glx_context); | |
| 236 | |
| 237 if( this->gl_data->glXReleaseBuffersMESA ) { | |
| 238 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window); | |
| 239 } | |
| 240 glx_context = NULL; | |
| 241 } | |
| 242 gl_active = 0; | |
| 243 #endif /* HAVE_OPENGL */ | |
| 244 } | |
| 245 | |
| 246 #ifdef HAVE_OPENGL | |
| 247 | |
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248 static int ExtensionSupported(const char *extension) |
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249 { |
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250 const GLubyte *extensions = NULL; |
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251 const GLubyte *start; |
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252 GLubyte *where, *terminator; |
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253 |
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254 /* Extension names should not have spaces. */ |
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255 where = (GLubyte *) strchr(extension, ' '); |
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256 if (where || *extension == '\0') |
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257 return 0; |
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258 |
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259 extensions = current_video->glGetString(GL_EXTENSIONS); |
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260 /* It takes a bit of care to be fool-proof about parsing the |
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261 * OpenGL extensions string. Don't be fooled by sub-strings, |
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262 * etc. */ |
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263 |
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264 start = extensions; |
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265 |
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266 for (;;) |
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267 { |
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268 where = (GLubyte *) strstr((const char *) start, extension); |
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269 if (!where) break; |
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270 |
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271 terminator = where + strlen(extension); |
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272 if (where == start || *(where - 1) == ' ') |
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273 if (*terminator == ' ' || *terminator == '\0') return 1; |
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274 |
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275 start = terminator; |
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276 } |
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277 |
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278 return 0; |
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279 } |
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280 |
| 0 | 281 /* Make the current context active */ |
| 282 int X11_GL_MakeCurrent(_THIS) | |
| 283 { | |
| 284 int retval; | |
|
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285 |
| 0 | 286 retval = 0; |
| 287 if ( ! this->gl_data->glXMakeCurrent(GFX_Display, | |
| 288 SDL_Window, glx_context) ) { | |
| 289 SDL_SetError("Unable to make GL context current"); | |
| 290 retval = -1; | |
| 291 } | |
| 292 XSync( GFX_Display, False ); | |
| 293 | |
|
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294 /* |
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295 * The context is now current, check for glXReleaseBuffersMESA() |
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296 * extension. If extension is _not_ supported, destroy the pointer |
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297 * (to make sure it will not be called in X11_GL_Shutdown() ). |
|
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298 * |
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299 * DRI/Mesa drivers include glXReleaseBuffersMESA() in the libGL.so, |
|
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300 * but there's no need to call it (is is only needed for some old |
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301 * non-DRI drivers). |
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302 * |
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303 * When using for example glew (http://glew.sf.net), dlsym() for |
|
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304 * glXReleaseBuffersMESA() returns the pointer from the glew library |
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305 * (namespace conflict). |
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306 * |
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307 * The glXReleaseBuffersMESA() pointer in the glew is NULL, if the |
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308 * driver doesn't support this extension. So blindly calling it will |
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309 * cause segfault with DRI/Mesa drivers! |
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310 * |
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311 */ |
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312 |
|
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313 if ( ! ExtensionSupported("glXReleaseBuffersMESA") ) { |
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314 this->gl_data->glXReleaseBuffersMESA = NULL; |
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315 } |
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316 |
| 0 | 317 /* More Voodoo X server workarounds... Grr... */ |
| 318 SDL_Lock_EventThread(); | |
| 319 X11_CheckDGAMouse(this); | |
| 320 SDL_Unlock_EventThread(); | |
| 321 | |
| 322 return(retval); | |
| 323 } | |
| 324 | |
| 325 /* Get attribute data from glX. */ | |
| 326 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
| 327 { | |
| 328 int retval; | |
| 329 int glx_attrib = None; | |
| 330 | |
| 331 switch( attrib ) { | |
| 332 case SDL_GL_RED_SIZE: | |
| 333 glx_attrib = GLX_RED_SIZE; | |
| 334 break; | |
| 335 case SDL_GL_GREEN_SIZE: | |
| 336 glx_attrib = GLX_GREEN_SIZE; | |
| 337 break; | |
| 338 case SDL_GL_BLUE_SIZE: | |
| 339 glx_attrib = GLX_BLUE_SIZE; | |
| 340 break; | |
| 341 case SDL_GL_ALPHA_SIZE: | |
| 342 glx_attrib = GLX_ALPHA_SIZE; | |
| 343 break; | |
| 344 case SDL_GL_DOUBLEBUFFER: | |
| 345 glx_attrib = GLX_DOUBLEBUFFER; | |
| 346 break; | |
| 347 case SDL_GL_BUFFER_SIZE: | |
| 348 glx_attrib = GLX_BUFFER_SIZE; | |
| 349 break; | |
| 350 case SDL_GL_DEPTH_SIZE: | |
| 351 glx_attrib = GLX_DEPTH_SIZE; | |
| 352 break; | |
| 353 case SDL_GL_STENCIL_SIZE: | |
| 354 glx_attrib = GLX_STENCIL_SIZE; | |
| 355 break; | |
| 356 case SDL_GL_ACCUM_RED_SIZE: | |
| 357 glx_attrib = GLX_ACCUM_RED_SIZE; | |
| 358 break; | |
| 359 case SDL_GL_ACCUM_GREEN_SIZE: | |
| 360 glx_attrib = GLX_ACCUM_GREEN_SIZE; | |
| 361 break; | |
| 362 case SDL_GL_ACCUM_BLUE_SIZE: | |
| 363 glx_attrib = GLX_ACCUM_BLUE_SIZE; | |
| 364 break; | |
| 365 case SDL_GL_ACCUM_ALPHA_SIZE: | |
| 366 glx_attrib = GLX_ACCUM_ALPHA_SIZE; | |
| 367 break; | |
|
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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368 case SDL_GL_STEREO: |
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369 glx_attrib = GLX_STEREO; |
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370 break; |
|
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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371 case SDL_GL_MULTISAMPLEBUFFERS: |
|
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372 glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
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373 break; |
|
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374 case SDL_GL_MULTISAMPLESAMPLES: |
|
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375 glx_attrib = GLX_SAMPLES_ARB; |
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376 break; |
| 0 | 377 default: |
| 378 return(-1); | |
| 379 } | |
| 380 | |
| 381 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); | |
| 382 | |
| 383 return retval; | |
| 384 } | |
| 385 | |
| 386 void X11_GL_SwapBuffers(_THIS) | |
| 387 { | |
| 388 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); | |
| 389 } | |
| 390 | |
| 391 #endif /* HAVE_OPENGL */ | |
| 392 | |
| 393 void X11_GL_UnloadLibrary(_THIS) | |
| 394 { | |
| 395 #ifdef HAVE_OPENGL | |
| 396 if ( this->gl_config.driver_loaded ) { | |
| 397 dlclose(this->gl_config.dll_handle); | |
| 398 | |
| 399 this->gl_data->glXGetProcAddress = NULL; | |
| 400 this->gl_data->glXChooseVisual = NULL; | |
| 401 this->gl_data->glXCreateContext = NULL; | |
| 402 this->gl_data->glXDestroyContext = NULL; | |
| 403 this->gl_data->glXMakeCurrent = NULL; | |
| 404 this->gl_data->glXSwapBuffers = NULL; | |
| 405 | |
| 406 this->gl_config.dll_handle = NULL; | |
| 407 this->gl_config.driver_loaded = 0; | |
| 408 } | |
| 409 #endif | |
| 410 } | |
| 411 | |
| 412 #ifdef HAVE_OPENGL | |
| 413 | |
| 414 /* Passing a NULL path means load pointers from the application */ | |
| 415 int X11_GL_LoadLibrary(_THIS, const char* path) | |
| 416 { | |
| 417 void* handle; | |
| 418 int dlopen_flags; | |
| 419 | |
| 420 if ( gl_active ) { | |
| 421 SDL_SetError("OpenGL context already created"); | |
| 422 return -1; | |
| 423 } | |
| 424 | |
| 425 #ifdef RTLD_GLOBAL | |
| 426 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; | |
| 427 #else | |
| 428 dlopen_flags = RTLD_LAZY; | |
| 429 #endif | |
| 430 handle = dlopen(path, dlopen_flags); | |
| 431 /* Catch the case where the application isn't linked with GL */ | |
| 432 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) { | |
| 433 dlclose(handle); | |
| 434 path = getenv("SDL_VIDEO_GL_DRIVER"); | |
| 435 if ( path == NULL ) { | |
| 436 path = DEFAULT_OPENGL; | |
| 437 } | |
| 438 handle = dlopen(path, dlopen_flags); | |
| 439 } | |
| 440 if ( handle == NULL ) { | |
| 441 SDL_SetError("Could not load OpenGL library"); | |
| 442 return -1; | |
| 443 } | |
| 444 | |
| 445 /* Unload the old driver and reset the pointers */ | |
| 446 X11_GL_UnloadLibrary(this); | |
| 447 | |
| 448 /* Load new function pointers */ | |
|
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449 this->gl_data->glXGetProcAddress = |
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450 (void *(*)(const GLubyte *)) dlsym(handle, "glXGetProcAddressARB"); |
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451 this->gl_data->glXChooseVisual = |
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452 (XVisualInfo *(*)(Display *, int, int *)) dlsym(handle, "glXChooseVisual"); |
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453 this->gl_data->glXCreateContext = |
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454 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) dlsym(handle, "glXCreateContext"); |
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455 this->gl_data->glXDestroyContext = |
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456 (void (*)(Display *, GLXContext)) dlsym(handle, "glXDestroyContext"); |
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457 this->gl_data->glXMakeCurrent = |
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458 (int (*)(Display *, GLXDrawable, GLXContext)) dlsym(handle, "glXMakeCurrent"); |
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459 this->gl_data->glXSwapBuffers = |
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460 (void (*)(Display *, GLXDrawable)) dlsym(handle, "glXSwapBuffers"); |
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461 this->gl_data->glXGetConfig = |
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462 (int (*)(Display *, XVisualInfo *, int, int *)) dlsym(handle, "glXGetConfig"); |
|
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463 this->gl_data->glXQueryExtensionsString = |
|
646
0f2029a70548
Fixed incorrect prototype for glXQueryExtensionsString()
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464 (const char *(*)(Display *, int)) dlsym(handle, "glXQueryExtensionsString"); |
|
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465 |
| 0 | 466 /* We don't compare below for this in case we're not using Mesa. */ |
|
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467 this->gl_data->glXReleaseBuffersMESA = |
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468 (void (*)(Display *, GLXDrawable)) dlsym( handle, "glXReleaseBuffersMESA" ); |
|
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469 |
|
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470 |
| 0 | 471 if ( (this->gl_data->glXChooseVisual == NULL) || |
| 472 (this->gl_data->glXCreateContext == NULL) || | |
| 473 (this->gl_data->glXDestroyContext == NULL) || | |
| 474 (this->gl_data->glXMakeCurrent == NULL) || | |
| 475 (this->gl_data->glXSwapBuffers == NULL) || | |
|
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476 (this->gl_data->glXGetConfig == NULL) || |
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477 (this->gl_data->glXQueryExtensionsString == NULL)) { |
| 0 | 478 SDL_SetError("Could not retrieve OpenGL functions"); |
| 479 return -1; | |
| 480 } | |
| 481 | |
| 482 this->gl_config.dll_handle = handle; | |
| 483 this->gl_config.driver_loaded = 1; | |
| 484 if ( path ) { | |
| 485 strncpy(this->gl_config.driver_path, path, | |
| 486 sizeof(this->gl_config.driver_path)-1); | |
| 487 } else { | |
| 488 strcpy(this->gl_config.driver_path, ""); | |
| 489 } | |
| 490 return 0; | |
| 491 } | |
| 492 | |
| 493 void *X11_GL_GetProcAddress(_THIS, const char* proc) | |
| 494 { | |
|
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495 static char procname[1024]; |
| 0 | 496 void* handle; |
|
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497 void* retval; |
| 0 | 498 |
| 499 handle = this->gl_config.dll_handle; | |
| 500 if ( this->gl_data->glXGetProcAddress ) { | |
|
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diff
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501 return this->gl_data->glXGetProcAddress(proc); |
| 0 | 502 } |
|
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503 #if defined(__OpenBSD__) && !defined(__ELF__) |
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504 #undef dlsym(x,y); |
|
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505 #endif |
|
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506 retval = dlsym(handle, proc); |
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507 if (!retval && strlen(proc) <= 1022) { |
|
127
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508 procname[0] = '_'; |
|
110
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509 strcpy(procname + 1, proc); |
|
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510 retval = dlsym(handle, procname); |
|
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511 } |
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512 return retval; |
| 0 | 513 } |
| 514 | |
| 515 #endif /* HAVE_OPENGL */ |