Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gl.c @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | ff73ee89ff4b |
| children | e94b0d7c33bc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #include <stdlib.h> /* For getenv() prototype */ | |
| 24 #include <string.h> | |
| 25 | |
| 26 #include "SDL_events_c.h" | |
| 27 #include "SDL_error.h" | |
| 28 #include "SDL_x11video.h" | |
| 29 #include "SDL_x11dga_c.h" | |
| 30 #include "SDL_x11gl_c.h" | |
| 31 | |
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32 #if defined(sgi) |
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33 /* IRIX doesn't have a GL library versioning system */ |
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34 #define DEFAULT_OPENGL "libGL.so" |
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35 #elif defined(MACOSX) |
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36 #define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib" |
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37 #else |
| 0 | 38 #define DEFAULT_OPENGL "libGL.so.1" |
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39 #endif |
| 0 | 40 |
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41 #ifndef GLX_ARB_multisample |
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42 #define GLX_ARB_multisample |
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43 #define GLX_SAMPLE_BUFFERS_ARB 100000 |
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44 #define GLX_SAMPLES_ARB 100001 |
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45 #endif |
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46 |
| 0 | 47 /* return the preferred visual to use for openGL graphics */ |
| 48 XVisualInfo *X11_GL_GetVisual(_THIS) | |
| 49 { | |
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50 #ifdef HAVE_OPENGL_X11 |
| 0 | 51 /* 64 seems nice. */ |
| 52 int attribs[64]; | |
| 53 int i; | |
| 54 | |
| 55 /* load the gl driver from a default path */ | |
| 56 if ( ! this->gl_config.driver_loaded ) { | |
| 57 /* no driver has been loaded, use default (ourselves) */ | |
| 58 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { | |
| 59 return NULL; | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 /* See if we already have a window which we must use */ | |
| 64 if ( SDL_windowid ) { | |
| 65 XWindowAttributes a; | |
| 66 XVisualInfo vi_in; | |
| 67 int out_count; | |
| 68 | |
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69 pXGetWindowAttributes(SDL_Display, SDL_Window, &a); |
| 0 | 70 vi_in.screen = SDL_Screen; |
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71 vi_in.visualid = pXVisualIDFromVisual(a.visual); |
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72 glx_visualinfo = pXGetVisualInfo(SDL_Display, |
| 0 | 73 VisualScreenMask|VisualIDMask, &vi_in, &out_count); |
| 74 return glx_visualinfo; | |
| 75 } | |
| 76 | |
| 77 /* Setup our GLX attributes according to the gl_config. */ | |
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78 i = 0; |
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79 attribs[i++] = GLX_RGBA; |
| 0 | 80 attribs[i++] = GLX_RED_SIZE; |
| 81 attribs[i++] = this->gl_config.red_size; | |
| 82 attribs[i++] = GLX_GREEN_SIZE; | |
| 83 attribs[i++] = this->gl_config.green_size; | |
| 84 attribs[i++] = GLX_BLUE_SIZE; | |
| 85 attribs[i++] = this->gl_config.blue_size; | |
| 86 | |
| 87 if( this->gl_config.alpha_size ) { | |
| 88 attribs[i++] = GLX_ALPHA_SIZE; | |
| 89 attribs[i++] = this->gl_config.alpha_size; | |
| 90 } | |
| 91 | |
| 92 if( this->gl_config.buffer_size ) { | |
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93 attribs[i++] = GLX_BUFFER_SIZE; |
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94 attribs[i++] = this->gl_config.buffer_size; |
| 0 | 95 } |
| 96 | |
| 97 if( this->gl_config.double_buffer ) { | |
| 98 attribs[i++] = GLX_DOUBLEBUFFER; | |
| 99 } | |
| 100 | |
| 101 attribs[i++] = GLX_DEPTH_SIZE; | |
| 102 attribs[i++] = this->gl_config.depth_size; | |
| 103 | |
| 104 if( this->gl_config.stencil_size ) { | |
| 105 attribs[i++] = GLX_STENCIL_SIZE; | |
| 106 attribs[i++] = this->gl_config.stencil_size; | |
| 107 } | |
| 108 | |
| 109 if( this->gl_config.accum_red_size ) { | |
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110 attribs[i++] = GLX_ACCUM_RED_SIZE; |
| 0 | 111 attribs[i++] = this->gl_config.accum_red_size; |
| 112 } | |
| 113 | |
| 114 if( this->gl_config.accum_green_size ) { | |
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115 attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| 0 | 116 attribs[i++] = this->gl_config.accum_green_size; |
| 117 } | |
| 118 | |
| 119 if( this->gl_config.accum_blue_size ) { | |
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120 attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| 0 | 121 attribs[i++] = this->gl_config.accum_blue_size; |
| 122 } | |
| 123 | |
| 124 if( this->gl_config.accum_alpha_size ) { | |
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125 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| 0 | 126 attribs[i++] = this->gl_config.accum_alpha_size; |
| 127 } | |
| 128 | |
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129 if( this->gl_config.stereo ) { |
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130 attribs[i++] = GLX_STEREO; |
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131 attribs[i++] = this->gl_config.stereo; |
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132 } |
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133 |
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134 if( this->gl_config.multisamplebuffers ) { |
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135 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
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136 attribs[i++] = this->gl_config.multisamplebuffers; |
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137 } |
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138 |
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139 if( this->gl_config.multisamplesamples ) { |
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140 attribs[i++] = GLX_SAMPLES_ARB; |
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141 attribs[i++] = this->gl_config.multisamplesamples; |
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142 } |
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143 |
| 0 | 144 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
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145 if ( !getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { |
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146 attribs[i++] = GLX_X_VISUAL_TYPE; |
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147 attribs[i++] = GLX_DIRECT_COLOR; |
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148 } |
| 0 | 149 #endif |
| 150 attribs[i++] = None; | |
| 151 | |
| 152 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 153 SDL_Screen, attribs); | |
| 154 #ifdef GLX_DIRECT_COLOR | |
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155 if( !glx_visualinfo && !getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */ |
| 0 | 156 attribs[i-3] = None; |
| 157 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 158 SDL_Screen, attribs); | |
| 159 } | |
| 160 #endif | |
| 161 if( !glx_visualinfo ) { | |
| 162 SDL_SetError( "Couldn't find matching GLX visual"); | |
| 163 return NULL; | |
| 164 } | |
| 165 return glx_visualinfo; | |
| 166 #else | |
| 167 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 168 return NULL; | |
| 169 #endif | |
| 170 } | |
| 171 | |
| 172 int X11_GL_CreateWindow(_THIS, int w, int h) | |
| 173 { | |
| 174 int retval; | |
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175 #ifdef HAVE_OPENGL_X11 |
| 0 | 176 XSetWindowAttributes attributes; |
| 177 unsigned long mask; | |
| 178 unsigned long black; | |
| 179 | |
| 180 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, | |
| 181 SDL_Screen)) | |
| 182 ? BlackPixel(SDL_Display, SDL_Screen) : 0; | |
| 183 attributes.background_pixel = black; | |
| 184 attributes.border_pixel = black; | |
| 185 attributes.colormap = SDL_XColorMap; | |
| 186 mask = CWBackPixel | CWBorderPixel | CWColormap; | |
| 187 | |
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188 SDL_Window = pXCreateWindow(SDL_Display, WMwindow, |
| 0 | 189 0, 0, w, h, 0, glx_visualinfo->depth, |
| 190 InputOutput, glx_visualinfo->visual, | |
| 191 mask, &attributes); | |
| 192 if ( !SDL_Window ) { | |
| 193 SDL_SetError("Could not create window"); | |
| 194 return -1; | |
| 195 } | |
| 196 retval = 0; | |
| 197 #else | |
| 198 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 199 retval = -1; | |
| 200 #endif | |
| 201 return(retval); | |
| 202 } | |
| 203 | |
| 204 int X11_GL_CreateContext(_THIS) | |
| 205 { | |
| 206 int retval; | |
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207 #ifdef HAVE_OPENGL_X11 |
| 0 | 208 /* We do this to create a clean separation between X and GLX errors. */ |
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209 pXSync( SDL_Display, False ); |
| 0 | 210 glx_context = this->gl_data->glXCreateContext(GFX_Display, |
| 211 glx_visualinfo, NULL, True); | |
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212 pXSync( GFX_Display, False ); |
| 0 | 213 |
| 214 if (glx_context == NULL) { | |
| 215 SDL_SetError("Could not create GL context"); | |
| 216 return -1; | |
| 217 } | |
| 218 | |
| 219 gl_active = 1; | |
| 220 #else | |
| 221 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 222 #endif | |
| 223 if ( gl_active ) { | |
| 224 retval = 0; | |
| 225 } else { | |
| 226 retval = -1; | |
| 227 } | |
| 228 return(retval); | |
| 229 } | |
| 230 | |
| 231 void X11_GL_Shutdown(_THIS) | |
| 232 { | |
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233 #ifdef HAVE_OPENGL_X11 |
| 0 | 234 /* Clean up OpenGL */ |
| 235 if( glx_context ) { | |
| 236 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); | |
| 237 | |
| 238 if (glx_context != NULL) | |
| 239 this->gl_data->glXDestroyContext(GFX_Display, glx_context); | |
| 240 | |
| 241 if( this->gl_data->glXReleaseBuffersMESA ) { | |
| 242 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window); | |
| 243 } | |
| 244 glx_context = NULL; | |
| 245 } | |
| 246 gl_active = 0; | |
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247 #endif /* HAVE_OPENGL_X11 */ |
| 0 | 248 } |
| 249 | |
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250 #ifdef HAVE_OPENGL_X11 |
| 0 | 251 |
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252 static int ExtensionSupported(const char *extension) |
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253 { |
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254 const GLubyte *extensions = NULL; |
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255 const GLubyte *start; |
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256 GLubyte *where, *terminator; |
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257 |
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258 /* Extension names should not have spaces. */ |
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259 where = (GLubyte *) strchr(extension, ' '); |
|
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260 if (where || *extension == '\0') |
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261 return 0; |
|
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262 |
|
643
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Removed direct dependency on OpenGL (call current_video->glGetString() instead
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263 extensions = current_video->glGetString(GL_EXTENSIONS); |
|
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264 /* It takes a bit of care to be fool-proof about parsing the |
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265 * OpenGL extensions string. Don't be fooled by sub-strings, |
|
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266 * etc. */ |
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267 |
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268 start = extensions; |
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269 |
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270 for (;;) |
|
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271 { |
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272 where = (GLubyte *) strstr((const char *) start, extension); |
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273 if (!where) break; |
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274 |
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275 terminator = where + strlen(extension); |
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276 if (where == start || *(where - 1) == ' ') |
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277 if (*terminator == ' ' || *terminator == '\0') return 1; |
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278 |
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279 start = terminator; |
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280 } |
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281 |
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282 return 0; |
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283 } |
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284 |
| 0 | 285 /* Make the current context active */ |
| 286 int X11_GL_MakeCurrent(_THIS) | |
| 287 { | |
| 288 int retval; | |
|
638
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289 |
| 0 | 290 retval = 0; |
| 291 if ( ! this->gl_data->glXMakeCurrent(GFX_Display, | |
| 292 SDL_Window, glx_context) ) { | |
| 293 SDL_SetError("Unable to make GL context current"); | |
| 294 retval = -1; | |
| 295 } | |
|
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Dynamically load X11 libraries like we currently do for alsa, esd, etc.
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296 pXSync( GFX_Display, False ); |
| 0 | 297 |
|
638
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298 /* |
|
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299 * The context is now current, check for glXReleaseBuffersMESA() |
|
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300 * extension. If extension is _not_ supported, destroy the pointer |
|
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301 * (to make sure it will not be called in X11_GL_Shutdown() ). |
|
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302 * |
|
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303 * DRI/Mesa drivers include glXReleaseBuffersMESA() in the libGL.so, |
|
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304 * but there's no need to call it (is is only needed for some old |
|
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305 * non-DRI drivers). |
|
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306 * |
|
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307 * When using for example glew (http://glew.sf.net), dlsym() for |
|
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308 * glXReleaseBuffersMESA() returns the pointer from the glew library |
|
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309 * (namespace conflict). |
|
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310 * |
|
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311 * The glXReleaseBuffersMESA() pointer in the glew is NULL, if the |
|
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312 * driver doesn't support this extension. So blindly calling it will |
|
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313 * cause segfault with DRI/Mesa drivers! |
|
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314 * |
|
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315 */ |
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316 |
|
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317 if ( ! ExtensionSupported("glXReleaseBuffersMESA") ) { |
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318 this->gl_data->glXReleaseBuffersMESA = NULL; |
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319 } |
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320 |
| 0 | 321 /* More Voodoo X server workarounds... Grr... */ |
| 322 SDL_Lock_EventThread(); | |
| 323 X11_CheckDGAMouse(this); | |
| 324 SDL_Unlock_EventThread(); | |
| 325 | |
| 326 return(retval); | |
| 327 } | |
| 328 | |
| 329 /* Get attribute data from glX. */ | |
| 330 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
| 331 { | |
| 332 int retval; | |
| 333 int glx_attrib = None; | |
| 334 | |
| 335 switch( attrib ) { | |
| 336 case SDL_GL_RED_SIZE: | |
| 337 glx_attrib = GLX_RED_SIZE; | |
| 338 break; | |
| 339 case SDL_GL_GREEN_SIZE: | |
| 340 glx_attrib = GLX_GREEN_SIZE; | |
| 341 break; | |
| 342 case SDL_GL_BLUE_SIZE: | |
| 343 glx_attrib = GLX_BLUE_SIZE; | |
| 344 break; | |
| 345 case SDL_GL_ALPHA_SIZE: | |
| 346 glx_attrib = GLX_ALPHA_SIZE; | |
| 347 break; | |
| 348 case SDL_GL_DOUBLEBUFFER: | |
| 349 glx_attrib = GLX_DOUBLEBUFFER; | |
| 350 break; | |
| 351 case SDL_GL_BUFFER_SIZE: | |
| 352 glx_attrib = GLX_BUFFER_SIZE; | |
| 353 break; | |
| 354 case SDL_GL_DEPTH_SIZE: | |
| 355 glx_attrib = GLX_DEPTH_SIZE; | |
| 356 break; | |
| 357 case SDL_GL_STENCIL_SIZE: | |
| 358 glx_attrib = GLX_STENCIL_SIZE; | |
| 359 break; | |
| 360 case SDL_GL_ACCUM_RED_SIZE: | |
| 361 glx_attrib = GLX_ACCUM_RED_SIZE; | |
| 362 break; | |
| 363 case SDL_GL_ACCUM_GREEN_SIZE: | |
| 364 glx_attrib = GLX_ACCUM_GREEN_SIZE; | |
| 365 break; | |
| 366 case SDL_GL_ACCUM_BLUE_SIZE: | |
| 367 glx_attrib = GLX_ACCUM_BLUE_SIZE; | |
| 368 break; | |
| 369 case SDL_GL_ACCUM_ALPHA_SIZE: | |
| 370 glx_attrib = GLX_ACCUM_ALPHA_SIZE; | |
| 371 break; | |
|
450
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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|
372 case SDL_GL_STEREO: |
|
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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373 glx_attrib = GLX_STEREO; |
|
8a43e0cbf02f
Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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|
374 break; |
|
656
864e2d2a9a55
Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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|
375 case SDL_GL_MULTISAMPLEBUFFERS: |
|
655
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376 glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
|
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377 break; |
|
656
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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|
378 case SDL_GL_MULTISAMPLESAMPLES: |
|
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379 glx_attrib = GLX_SAMPLES_ARB; |
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380 break; |
| 0 | 381 default: |
| 382 return(-1); | |
| 383 } | |
| 384 | |
| 385 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); | |
| 386 | |
| 387 return retval; | |
| 388 } | |
| 389 | |
| 390 void X11_GL_SwapBuffers(_THIS) | |
| 391 { | |
| 392 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); | |
| 393 } | |
| 394 | |
|
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395 #endif /* HAVE_OPENGL_X11 */ |
| 0 | 396 |
| 397 void X11_GL_UnloadLibrary(_THIS) | |
| 398 { | |
|
1191
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399 #ifdef HAVE_OPENGL_X11 |
| 0 | 400 if ( this->gl_config.driver_loaded ) { |
|
1191
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401 |
|
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402 /* !!! FIXME: Can we just use SDL_UnloadObject() everywhere? */ |
|
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403 #ifdef USE_DLOPEN |
| 0 | 404 dlclose(this->gl_config.dll_handle); |
|
1191
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405 #else |
|
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406 SDL_UnloadObject(this->gl_config.dll_handle); |
|
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|
407 #endif |
| 0 | 408 |
| 409 this->gl_data->glXGetProcAddress = NULL; | |
| 410 this->gl_data->glXChooseVisual = NULL; | |
| 411 this->gl_data->glXCreateContext = NULL; | |
| 412 this->gl_data->glXDestroyContext = NULL; | |
| 413 this->gl_data->glXMakeCurrent = NULL; | |
| 414 this->gl_data->glXSwapBuffers = NULL; | |
| 415 | |
| 416 this->gl_config.dll_handle = NULL; | |
| 417 this->gl_config.driver_loaded = 0; | |
| 418 } | |
| 419 #endif | |
| 420 } | |
| 421 | |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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422 #ifdef HAVE_OPENGL_X11 |
| 0 | 423 |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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424 static void *do_dlsym(void *handle, const char *name) |
|
2bd4cec0de63
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425 { |
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426 /* !!! FIXME: Can we just use SDL_LoadFunction() everywhere? */ |
|
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427 #ifdef USE_DLOPEN |
|
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428 return dlsym(handle, name); |
|
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429 #else |
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430 return SDL_LoadFunction(handle, name); |
|
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431 #endif |
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432 } |
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433 |
|
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434 #if defined(__OpenBSD__) && !defined(__ELF__) |
|
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435 #define do_dlsym(x,y) do_dlsym(x, "_" y) |
|
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436 #endif |
|
1182
e8e8dcb68e7a
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437 |
| 0 | 438 /* Passing a NULL path means load pointers from the application */ |
| 439 int X11_GL_LoadLibrary(_THIS, const char* path) | |
| 440 { | |
|
1191
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Seperate glX from HAVE_OPENGL, for platforms that have both an X server and
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441 void* handle = NULL; |
| 0 | 442 |
|
1182
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443 if ( gl_active ) { |
|
e8e8dcb68e7a
X11 driver now chooses "libGL.so.1" as a default when a NULL is passed to
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444 SDL_SetError("OpenGL context already created"); |
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445 return -1; |
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446 } |
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447 |
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448 if ( path == NULL ) { |
| 0 | 449 path = getenv("SDL_VIDEO_GL_DRIVER"); |
| 450 if ( path == NULL ) { | |
| 451 path = DEFAULT_OPENGL; | |
| 452 } | |
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453 } |
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454 |
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455 /* !!! FIXME: Can we just use SDL_LoadObject() everywhere? */ |
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456 #ifdef USE_DLOPEN |
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457 { |
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458 #ifdef RTLD_GLOBAL |
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459 int dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; |
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460 #else |
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461 int dlopen_flags = RTLD_LAZY; |
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462 #endif |
| 0 | 463 handle = dlopen(path, dlopen_flags); |
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464 if ( handle == NULL ) { |
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465 SDL_SetError("Could not load OpenGL library: %s", (const char *) dlerror()); |
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466 return -1; |
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467 } |
| 0 | 468 } |
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469 #else |
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470 handle = SDL_LoadObject(path); |
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471 if ( handle == NULL ) { |
|
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472 /* SDL_LoadObject() will call SDL_SetError() for us. */ |
|
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473 return -1; |
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474 } |
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475 #endif |
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476 |
| 0 | 477 |
| 478 /* Unload the old driver and reset the pointers */ | |
| 479 X11_GL_UnloadLibrary(this); | |
| 480 | |
| 481 /* Load new function pointers */ | |
|
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482 this->gl_data->glXGetProcAddress = |
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483 (void *(*)(const GLubyte *)) do_dlsym(handle, "glXGetProcAddressARB"); |
|
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484 this->gl_data->glXChooseVisual = |
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485 (XVisualInfo *(*)(Display *, int, int *)) do_dlsym(handle, "glXChooseVisual"); |
|
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486 this->gl_data->glXCreateContext = |
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487 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) do_dlsym(handle, "glXCreateContext"); |
|
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488 this->gl_data->glXDestroyContext = |
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489 (void (*)(Display *, GLXContext)) do_dlsym(handle, "glXDestroyContext"); |
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490 this->gl_data->glXMakeCurrent = |
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491 (int (*)(Display *, GLXDrawable, GLXContext)) do_dlsym(handle, "glXMakeCurrent"); |
|
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492 this->gl_data->glXSwapBuffers = |
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493 (void (*)(Display *, GLXDrawable)) do_dlsym(handle, "glXSwapBuffers"); |
|
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494 this->gl_data->glXGetConfig = |
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495 (int (*)(Display *, XVisualInfo *, int, int *)) do_dlsym(handle, "glXGetConfig"); |
|
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496 this->gl_data->glXQueryExtensionsString = |
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497 (const char *(*)(Display *, int)) do_dlsym(handle, "glXQueryExtensionsString"); |
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498 |
| 0 | 499 /* We don't compare below for this in case we're not using Mesa. */ |
|
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500 this->gl_data->glXReleaseBuffersMESA = |
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501 (void (*)(Display *, GLXDrawable)) do_dlsym( handle, "glXReleaseBuffersMESA" ); |
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502 |
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503 |
| 0 | 504 if ( (this->gl_data->glXChooseVisual == NULL) || |
| 505 (this->gl_data->glXCreateContext == NULL) || | |
| 506 (this->gl_data->glXDestroyContext == NULL) || | |
| 507 (this->gl_data->glXMakeCurrent == NULL) || | |
| 508 (this->gl_data->glXSwapBuffers == NULL) || | |
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509 (this->gl_data->glXGetConfig == NULL) || |
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510 (this->gl_data->glXQueryExtensionsString == NULL)) { |
| 0 | 511 SDL_SetError("Could not retrieve OpenGL functions"); |
| 512 return -1; | |
| 513 } | |
| 514 | |
| 515 this->gl_config.dll_handle = handle; | |
| 516 this->gl_config.driver_loaded = 1; | |
| 517 if ( path ) { | |
| 518 strncpy(this->gl_config.driver_path, path, | |
| 519 sizeof(this->gl_config.driver_path)-1); | |
| 520 } else { | |
| 521 strcpy(this->gl_config.driver_path, ""); | |
| 522 } | |
| 523 return 0; | |
| 524 } | |
| 525 | |
| 526 void *X11_GL_GetProcAddress(_THIS, const char* proc) | |
| 527 { | |
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528 static char procname[1024]; |
| 0 | 529 void* handle; |
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530 void* retval; |
| 0 | 531 |
| 532 handle = this->gl_config.dll_handle; | |
| 533 if ( this->gl_data->glXGetProcAddress ) { | |
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534 return this->gl_data->glXGetProcAddress((const GLubyte *)proc); |
| 0 | 535 } |
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536 #if defined(__OpenBSD__) && !defined(__ELF__) |
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537 #undef do_dlsym |
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538 #endif |
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539 retval = do_dlsym(handle, proc); |
|
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540 if (!retval && strlen(proc) <= 1022) { |
|
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541 procname[0] = '_'; |
|
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542 strcpy(procname + 1, proc); |
|
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543 retval = do_dlsym(handle, procname); |
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544 } |
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545 return retval; |
| 0 | 546 } |
| 547 | |
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548 #endif /* HAVE_OPENGL_X11 */ |