| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 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 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | #include "SDL_x11video.h" |
| 25 | #include "../../events/SDL_events_c.h" |
| 26 | #include "SDL_x11dga_c.h" |
| 27 | #include "SDL_x11gl_c.h" |
| 28 | |
| 29 | #if defined(__IRIX__) |
| 30 | /* IRIX doesn't have a GL library versioning system */ |
| 31 | #define DEFAULT_OPENGL "libGL.so" |
| 32 | #elif defined(__MACOSX__) |
| 33 | #define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib" |
| 34 | #elif defined(__QNXNTO__) |
| 35 | #define DEFAULT_OPENGL "libGL.so.3" |
| 36 | #elif defined(__OpenBSD__) |
| 37 | #define DEFAULT_OPENGL "libGL.so.4.0" |
| 38 | #else |
| 39 | #define DEFAULT_OPENGL "libGL.so.1" |
| 40 | #endif |
| 41 | |
| 42 | #ifndef GLX_ARB_multisample |
| 43 | #define GLX_ARB_multisample |
| 44 | #define GLX_SAMPLE_BUFFERS_ARB 100000 |
| 45 | #define GLX_SAMPLES_ARB 100001 |
| 46 | #endif |
| 47 | |
| 48 | /* GLX_EXT_visual_rating stuff that might not be in the system headers... */ |
| 49 | #ifndef GLX_VISUAL_CAVEAT_EXT |
| 50 | #define GLX_VISUAL_CAVEAT_EXT 0x20 |
| 51 | #endif |
| 52 | #ifndef GLX_NONE_EXT |
| 53 | #define GLX_NONE_EXT 0x8000 |
| 54 | #endif |
| 55 | #ifndef GLX_SLOW_VISUAL_EXT |
| 56 | #define GLX_SLOW_VISUAL_EXT 0x8001 |
| 57 | #endif |
| 58 | #ifndef GLX_NON_CONFORMANT_VISUAL_EXT |
| 59 | #define GLX_NON_CONFORMANT_VISUAL_EXT 0x800D |
| 60 | #endif |
| 61 | |
| 62 | |
| 63 | #if SDL_VIDEO_OPENGL_GLX |
| 64 | static int glXExtensionSupported(_THIS, const char *extension) |
| 65 | { |
| 66 | const char *extensions; |
| 67 | const char *start; |
| 68 | const char *where, *terminator; |
| 69 | |
| 70 | /* Extension names should not have spaces. */ |
| 71 | where = SDL_strchr(extension, ' '); |
| 72 | if ( where || *extension == '\0' ) { |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | extensions = this->gl_data->glXQueryExtensionsString(GFX_Display,SDL_Screen); |
| 77 | /* It takes a bit of care to be fool-proof about parsing the |
| 78 | * OpenGL extensions string. Don't be fooled by sub-strings, etc. |
| 79 | */ |
| 80 | |
| 81 | /* http://bugs.debian.org/537487 */ |
| 82 | if (extensions == NULL) { |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | start = extensions; |
| 87 | |
| 88 | for (;;) { |
| 89 | where = SDL_strstr(start, extension); |
| 90 | if (!where) break; |
| 91 | |
| 92 | terminator = where + strlen(extension); |
| 93 | if (where == start || *(where - 1) == ' ') |
| 94 | if (*terminator == ' ' || *terminator == '\0') return 1; |
| 95 | |
| 96 | start = terminator; |
| 97 | } |
| 98 | return 0; |
| 99 | } |
| 100 | #endif /* SDL_VIDEO_OPENGL_GLX */ |
| 101 | |
| 102 | XVisualInfo *X11_GL_GetVisual(_THIS) |
| 103 | { |
| 104 | #if SDL_VIDEO_OPENGL_GLX |
| 105 | /* 64 seems nice. */ |
| 106 | int attribs[64]; |
| 107 | int i; |
| 108 | |
| 109 | /* load the gl driver from a default path */ |
| 110 | if ( ! this->gl_config.driver_loaded ) { |
| 111 | /* no driver has been loaded, use default (ourselves) */ |
| 112 | if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { |
| 113 | return NULL; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /* See if we already have a window which we must use */ |
| 118 | if ( SDL_windowid ) { |
| 119 | XWindowAttributes a; |
| 120 | XVisualInfo vi_in; |
| 121 | int out_count; |
| 122 | |
| 123 | XGetWindowAttributes(SDL_Display, SDL_Window, &a); |
| 124 | vi_in.screen = SDL_Screen; |
| 125 | vi_in.visualid = XVisualIDFromVisual(a.visual); |
| 126 | glx_visualinfo = XGetVisualInfo(SDL_Display, |
| 127 | VisualScreenMask|VisualIDMask, &vi_in, &out_count); |
| 128 | return glx_visualinfo; |
| 129 | } |
| 130 | |
| 131 | /* Setup our GLX attributes according to the gl_config. */ |
| 132 | i = 0; |
| 133 | attribs[i++] = GLX_RGBA; |
| 134 | attribs[i++] = GLX_RED_SIZE; |
| 135 | attribs[i++] = this->gl_config.red_size; |
| 136 | attribs[i++] = GLX_GREEN_SIZE; |
| 137 | attribs[i++] = this->gl_config.green_size; |
| 138 | attribs[i++] = GLX_BLUE_SIZE; |
| 139 | attribs[i++] = this->gl_config.blue_size; |
| 140 | |
| 141 | if( this->gl_config.alpha_size ) { |
| 142 | attribs[i++] = GLX_ALPHA_SIZE; |
| 143 | attribs[i++] = this->gl_config.alpha_size; |
| 144 | } |
| 145 | |
| 146 | if( this->gl_config.buffer_size ) { |
| 147 | attribs[i++] = GLX_BUFFER_SIZE; |
| 148 | attribs[i++] = this->gl_config.buffer_size; |
| 149 | } |
| 150 | |
| 151 | if( this->gl_config.double_buffer ) { |
| 152 | attribs[i++] = GLX_DOUBLEBUFFER; |
| 153 | } |
| 154 | |
| 155 | attribs[i++] = GLX_DEPTH_SIZE; |
| 156 | attribs[i++] = this->gl_config.depth_size; |
| 157 | |
| 158 | if( this->gl_config.stencil_size ) { |
| 159 | attribs[i++] = GLX_STENCIL_SIZE; |
| 160 | attribs[i++] = this->gl_config.stencil_size; |
| 161 | } |
| 162 | |
| 163 | if( this->gl_config.accum_red_size ) { |
| 164 | attribs[i++] = GLX_ACCUM_RED_SIZE; |
| 165 | attribs[i++] = this->gl_config.accum_red_size; |
| 166 | } |
| 167 | |
| 168 | if( this->gl_config.accum_green_size ) { |
| 169 | attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| 170 | attribs[i++] = this->gl_config.accum_green_size; |
| 171 | } |
| 172 | |
| 173 | if( this->gl_config.accum_blue_size ) { |
| 174 | attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| 175 | attribs[i++] = this->gl_config.accum_blue_size; |
| 176 | } |
| 177 | |
| 178 | if( this->gl_config.accum_alpha_size ) { |
| 179 | attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| 180 | attribs[i++] = this->gl_config.accum_alpha_size; |
| 181 | } |
| 182 | |
| 183 | if( this->gl_config.stereo ) { |
| 184 | attribs[i++] = GLX_STEREO; |
| 185 | } |
| 186 | |
| 187 | if( this->gl_config.multisamplebuffers ) { |
| 188 | attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
| 189 | attribs[i++] = this->gl_config.multisamplebuffers; |
| 190 | } |
| 191 | |
| 192 | if( this->gl_config.multisamplesamples ) { |
| 193 | attribs[i++] = GLX_SAMPLES_ARB; |
| 194 | attribs[i++] = this->gl_config.multisamplesamples; |
| 195 | } |
| 196 | |
| 197 | if( this->gl_config.accelerated >= 0 && |
| 198 | glXExtensionSupported(this, "GLX_EXT_visual_rating") ) { |
| 199 | attribs[i++] = GLX_VISUAL_CAVEAT_EXT; |
| 200 | attribs[i++] = GLX_NONE_EXT; |
| 201 | } |
| 202 | |
| 203 | #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
| 204 | if ( !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { |
| 205 | attribs[i++] = GLX_X_VISUAL_TYPE; |
| 206 | attribs[i++] = GLX_DIRECT_COLOR; |
| 207 | } |
| 208 | #endif |
| 209 | attribs[i++] = None; |
| 210 | |
| 211 | glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, |
| 212 | SDL_Screen, attribs); |
| 213 | #ifdef GLX_DIRECT_COLOR |
| 214 | if( !glx_visualinfo && !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */ |
| 215 | attribs[i-3] = None; |
| 216 | glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, |
| 217 | SDL_Screen, attribs); |
| 218 | } |
| 219 | #endif |
| 220 | if( !glx_visualinfo ) { |
| 221 | SDL_SetError( "Couldn't find matching GLX visual"); |
| 222 | return NULL; |
| 223 | } |
| 224 | /* |
| 225 | printf("Found GLX visual 0x%x\n", glx_visualinfo->visualid); |
| 226 | */ |
| 227 | return glx_visualinfo; |
| 228 | #else |
| 229 | SDL_SetError("X11 driver not configured with OpenGL"); |
| 230 | return NULL; |
| 231 | #endif |
| 232 | } |
| 233 | |
| 234 | int X11_GL_CreateWindow(_THIS, int w, int h) |
| 235 | { |
| 236 | int retval; |
| 237 | #if SDL_VIDEO_OPENGL_GLX |
| 238 | XSetWindowAttributes attributes; |
| 239 | unsigned long mask; |
| 240 | unsigned long black; |
| 241 | |
| 242 | black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, |
| 243 | SDL_Screen)) |
| 244 | ? BlackPixel(SDL_Display, SDL_Screen) : 0; |
| 245 | attributes.background_pixel = black; |
| 246 | attributes.border_pixel = black; |
| 247 | attributes.colormap = SDL_XColorMap; |
| 248 | mask = CWBackPixel | CWBorderPixel | CWColormap; |
| 249 | |
| 250 | SDL_Window = XCreateWindow(SDL_Display, WMwindow, |
| 251 | 0, 0, w, h, 0, glx_visualinfo->depth, |
| 252 | InputOutput, glx_visualinfo->visual, |
| 253 | mask, &attributes); |
| 254 | if ( !SDL_Window ) { |
| 255 | SDL_SetError("Could not create window"); |
| 256 | return -1; |
| 257 | } |
| 258 | retval = 0; |
| 259 | #else |
| 260 | SDL_SetError("X11 driver not configured with OpenGL"); |
| 261 | retval = -1; |
| 262 | #endif |
| 263 | return(retval); |
| 264 | } |
| 265 | |
| 266 | int X11_GL_CreateContext(_THIS) |
| 267 | { |
| 268 | int retval; |
| 269 | #if SDL_VIDEO_OPENGL_GLX |
| 270 | |
| 271 | /* We do this to create a clean separation between X and GLX errors. */ |
| 272 | XSync( SDL_Display, False ); |
| 273 | glx_context = this->gl_data->glXCreateContext(GFX_Display, |
| 274 | glx_visualinfo, NULL, True); |
| 275 | XSync( GFX_Display, False ); |
| 276 | |
| 277 | if ( glx_context == NULL ) { |
| 278 | SDL_SetError("Could not create GL context"); |
| 279 | return(-1); |
| 280 | } |
| 281 | if ( X11_GL_MakeCurrent(this) < 0 ) { |
| 282 | return(-1); |
| 283 | } |
| 284 | gl_active = 1; |
| 285 | |
| 286 | if ( !glXExtensionSupported(this, "GLX_SGI_swap_control") ) { |
| 287 | this->gl_data->glXSwapIntervalSGI = NULL; |
| 288 | } |
| 289 | if ( !glXExtensionSupported(this, "GLX_MESA_swap_control") ) { |
| 290 | this->gl_data->glXSwapIntervalMESA = NULL; |
| 291 | } |
| 292 | if ( this->gl_config.swap_control >= 0 ) { |
| 293 | int rc = -1; |
| 294 | if ( this->gl_data->glXSwapIntervalMESA ) { |
| 295 | rc = this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control); |
| 296 | } else if ( this->gl_data->glXSwapIntervalSGI ) { |
| 297 | rc = this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control); |
| 298 | } |
| 299 | if (rc == 0) { |
| 300 | this->gl_data->swap_interval = this->gl_config.swap_control; |
| 301 | } |
| 302 | } |
| 303 | #else |
| 304 | SDL_SetError("X11 driver not configured with OpenGL"); |
| 305 | #endif |
| 306 | if ( gl_active ) { |
| 307 | retval = 0; |
| 308 | } else { |
| 309 | retval = -1; |
| 310 | } |
| 311 | return(retval); |
| 312 | } |
| 313 | |
| 314 | void X11_GL_Shutdown(_THIS) |
| 315 | { |
| 316 | #if SDL_VIDEO_OPENGL_GLX |
| 317 | /* Clean up OpenGL */ |
| 318 | if( glx_context ) { |
| 319 | this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); |
| 320 | |
| 321 | if (glx_context != NULL) |
| 322 | this->gl_data->glXDestroyContext(GFX_Display, glx_context); |
| 323 | |
| 324 | glx_context = NULL; |
| 325 | } |
| 326 | gl_active = 0; |
| 327 | #endif /* SDL_VIDEO_OPENGL_GLX */ |
| 328 | } |
| 329 | |
| 330 | #if SDL_VIDEO_OPENGL_GLX |
| 331 | |
| 332 | /* Make the current context active */ |
| 333 | int X11_GL_MakeCurrent(_THIS) |
| 334 | { |
| 335 | int retval; |
| 336 | |
| 337 | retval = 0; |
| 338 | if ( ! this->gl_data->glXMakeCurrent(GFX_Display, |
| 339 | SDL_Window, glx_context) ) { |
| 340 | SDL_SetError("Unable to make GL context current"); |
| 341 | retval = -1; |
| 342 | } |
| 343 | XSync( GFX_Display, False ); |
| 344 | |
| 345 | /* More Voodoo X server workarounds... Grr... */ |
| 346 | SDL_Lock_EventThread(); |
| 347 | X11_CheckDGAMouse(this); |
| 348 | SDL_Unlock_EventThread(); |
| 349 | |
| 350 | return(retval); |
| 351 | } |
| 352 | |
| 353 | /* Get attribute data from glX. */ |
| 354 | int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) |
| 355 | { |
| 356 | int retval = -1; |
| 357 | int unsupported = 0; |
| 358 | int glx_attrib = None; |
| 359 | |
| 360 | switch( attrib ) { |
| 361 | case SDL_GL_RED_SIZE: |
| 362 | glx_attrib = GLX_RED_SIZE; |
| 363 | break; |
| 364 | case SDL_GL_GREEN_SIZE: |
| 365 | glx_attrib = GLX_GREEN_SIZE; |
| 366 | break; |
| 367 | case SDL_GL_BLUE_SIZE: |
| 368 | glx_attrib = GLX_BLUE_SIZE; |
| 369 | break; |
| 370 | case SDL_GL_ALPHA_SIZE: |
| 371 | glx_attrib = GLX_ALPHA_SIZE; |
| 372 | break; |
| 373 | case SDL_GL_DOUBLEBUFFER: |
| 374 | glx_attrib = GLX_DOUBLEBUFFER; |
| 375 | break; |
| 376 | case SDL_GL_BUFFER_SIZE: |
| 377 | glx_attrib = GLX_BUFFER_SIZE; |
| 378 | break; |
| 379 | case SDL_GL_DEPTH_SIZE: |
| 380 | glx_attrib = GLX_DEPTH_SIZE; |
| 381 | break; |
| 382 | case SDL_GL_STENCIL_SIZE: |
| 383 | glx_attrib = GLX_STENCIL_SIZE; |
| 384 | break; |
| 385 | case SDL_GL_ACCUM_RED_SIZE: |
| 386 | glx_attrib = GLX_ACCUM_RED_SIZE; |
| 387 | break; |
| 388 | case SDL_GL_ACCUM_GREEN_SIZE: |
| 389 | glx_attrib = GLX_ACCUM_GREEN_SIZE; |
| 390 | break; |
| 391 | case SDL_GL_ACCUM_BLUE_SIZE: |
| 392 | glx_attrib = GLX_ACCUM_BLUE_SIZE; |
| 393 | break; |
| 394 | case SDL_GL_ACCUM_ALPHA_SIZE: |
| 395 | glx_attrib = GLX_ACCUM_ALPHA_SIZE; |
| 396 | break; |
| 397 | case SDL_GL_STEREO: |
| 398 | glx_attrib = GLX_STEREO; |
| 399 | break; |
| 400 | case SDL_GL_MULTISAMPLEBUFFERS: |
| 401 | glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
| 402 | break; |
| 403 | case SDL_GL_MULTISAMPLESAMPLES: |
| 404 | glx_attrib = GLX_SAMPLES_ARB; |
| 405 | break; |
| 406 | case SDL_GL_ACCELERATED_VISUAL: |
| 407 | if ( glXExtensionSupported(this, "GLX_EXT_visual_rating") ) { |
| 408 | glx_attrib = GLX_VISUAL_CAVEAT_EXT; |
| 409 | retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); |
| 410 | if ( *value == GLX_SLOW_VISUAL_EXT ) { |
| 411 | *value = SDL_FALSE; |
| 412 | } else { |
| 413 | *value = SDL_TRUE; |
| 414 | } |
| 415 | return retval; |
| 416 | } else { |
| 417 | unsupported = 1; |
| 418 | } |
| 419 | break; |
| 420 | case SDL_GL_SWAP_CONTROL: |
| 421 | if ( ( this->gl_data->glXSwapIntervalMESA ) || |
| 422 | ( this->gl_data->glXSwapIntervalSGI ) ) { |
| 423 | *value = this->gl_data->swap_interval; |
| 424 | return 0; |
| 425 | } else { |
| 426 | unsupported = 1; |
| 427 | } |
| 428 | break; |
| 429 | default: |
| 430 | unsupported = 1; |
| 431 | break; |
| 432 | } |
| 433 | |
| 434 | if (unsupported) { |
| 435 | SDL_SetError("OpenGL attribute is unsupported on this system"); |
| 436 | } else { |
| 437 | retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); |
| 438 | } |
| 439 | return retval; |
| 440 | } |
| 441 | |
| 442 | void X11_GL_SwapBuffers(_THIS) |
| 443 | { |
| 444 | this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); |
| 445 | } |
| 446 | |
| 447 | #endif /* SDL_VIDEO_OPENGL_GLX */ |
| 448 | |
| 449 | #define OPENGL_REQUIRS_DLOPEN |
| 450 | #if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN) |
| 451 | #include <dlfcn.h> |
| 452 | #define GL_LoadObject(X) dlopen(X, (RTLD_NOW|RTLD_GLOBAL)) |
| 453 | #define GL_LoadFunction dlsym |
| 454 | #define GL_UnloadObject dlclose |
| 455 | #else |
| 456 | #define GL_LoadObject SDL_LoadObject |
| 457 | #define GL_LoadFunction SDL_LoadFunction |
| 458 | #define GL_UnloadObject SDL_UnloadObject |
| 459 | #endif |
| 460 | |
| 461 | void X11_GL_UnloadLibrary(_THIS) |
| 462 | { |
| 463 | #if SDL_VIDEO_OPENGL_GLX |
| 464 | if ( this->gl_config.driver_loaded ) { |
| 465 | |
| 466 | GL_UnloadObject(this->gl_config.dll_handle); |
| 467 | |
| 468 | this->gl_data->glXGetProcAddress = NULL; |
| 469 | this->gl_data->glXChooseVisual = NULL; |
| 470 | this->gl_data->glXCreateContext = NULL; |
| 471 | this->gl_data->glXDestroyContext = NULL; |
| 472 | this->gl_data->glXMakeCurrent = NULL; |
| 473 | this->gl_data->glXSwapBuffers = NULL; |
| 474 | this->gl_data->glXSwapIntervalSGI = NULL; |
| 475 | this->gl_data->glXSwapIntervalMESA = NULL; |
| 476 | |
| 477 | this->gl_config.dll_handle = NULL; |
| 478 | this->gl_config.driver_loaded = 0; |
| 479 | } |
| 480 | #endif |
| 481 | } |
| 482 | |
| 483 | #if SDL_VIDEO_OPENGL_GLX |
| 484 | |
| 485 | /* Passing a NULL path means load pointers from the application */ |
| 486 | int X11_GL_LoadLibrary(_THIS, const char* path) |
| 487 | { |
| 488 | void* handle = NULL; |
| 489 | |
| 490 | if ( gl_active ) { |
| 491 | SDL_SetError("OpenGL context already created"); |
| 492 | return -1; |
| 493 | } |
| 494 | |
| 495 | if ( path == NULL ) { |
| 496 | path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
| 497 | if ( path == NULL ) { |
| 498 | path = DEFAULT_OPENGL; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | handle = GL_LoadObject(path); |
| 503 | if ( handle == NULL ) { |
| 504 | #if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN) |
| 505 | SDL_SetError("Failed loading %s", path); |
| 506 | #else |
| 507 | /* SDL_LoadObject() will call SDL_SetError() for us. */ |
| 508 | #endif |
| 509 | return -1; |
| 510 | } |
| 511 | |
| 512 | /* Unload the old driver and reset the pointers */ |
| 513 | X11_GL_UnloadLibrary(this); |
| 514 | |
| 515 | /* Load new function pointers */ |
| 516 | this->gl_data->glXGetProcAddress = |
| 517 | (void *(*)(const GLubyte *)) GL_LoadFunction(handle, "glXGetProcAddressARB"); |
| 518 | this->gl_data->glXChooseVisual = |
| 519 | (XVisualInfo *(*)(Display *, int, int *)) GL_LoadFunction(handle, "glXChooseVisual"); |
| 520 | this->gl_data->glXCreateContext = |
| 521 | (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) GL_LoadFunction(handle, "glXCreateContext"); |
| 522 | this->gl_data->glXDestroyContext = |
| 523 | (void (*)(Display *, GLXContext)) GL_LoadFunction(handle, "glXDestroyContext"); |
| 524 | this->gl_data->glXMakeCurrent = |
| 525 | (int (*)(Display *, GLXDrawable, GLXContext)) GL_LoadFunction(handle, "glXMakeCurrent"); |
| 526 | this->gl_data->glXSwapBuffers = |
| 527 | (void (*)(Display *, GLXDrawable)) GL_LoadFunction(handle, "glXSwapBuffers"); |
| 528 | this->gl_data->glXGetConfig = |
| 529 | (int (*)(Display *, XVisualInfo *, int, int *)) GL_LoadFunction(handle, "glXGetConfig"); |
| 530 | this->gl_data->glXQueryExtensionsString = |
| 531 | (const char *(*)(Display *, int)) GL_LoadFunction(handle, "glXQueryExtensionsString"); |
| 532 | this->gl_data->glXSwapIntervalSGI = |
| 533 | (int (*)(int)) GL_LoadFunction(handle, "glXSwapIntervalSGI"); |
| 534 | this->gl_data->glXSwapIntervalMESA = |
| 535 | (GLint (*)(unsigned)) GL_LoadFunction(handle, "glXSwapIntervalMESA"); |
| 536 | |
| 537 | if ( (this->gl_data->glXChooseVisual == NULL) || |
| 538 | (this->gl_data->glXCreateContext == NULL) || |
| 539 | (this->gl_data->glXDestroyContext == NULL) || |
| 540 | (this->gl_data->glXMakeCurrent == NULL) || |
| 541 | (this->gl_data->glXSwapBuffers == NULL) || |
| 542 | (this->gl_data->glXGetConfig == NULL) || |
| 543 | (this->gl_data->glXQueryExtensionsString == NULL)) { |
| 544 | SDL_SetError("Could not retrieve OpenGL functions"); |
| 545 | return -1; |
| 546 | } |
| 547 | |
| 548 | this->gl_config.dll_handle = handle; |
| 549 | this->gl_config.driver_loaded = 1; |
| 550 | if ( path ) { |
| 551 | SDL_strlcpy(this->gl_config.driver_path, path, |
| 552 | SDL_arraysize(this->gl_config.driver_path)); |
| 553 | } else { |
| 554 | *this->gl_config.driver_path = '\0'; |
| 555 | } |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | void *X11_GL_GetProcAddress(_THIS, const char* proc) |
| 560 | { |
| 561 | void* handle; |
| 562 | |
| 563 | handle = this->gl_config.dll_handle; |
| 564 | if ( this->gl_data->glXGetProcAddress ) { |
| 565 | return this->gl_data->glXGetProcAddress((const GLubyte *)proc); |
| 566 | } |
| 567 | return GL_LoadFunction(handle, proc); |
| 568 | } |
| 569 | |
| 570 | #endif /* SDL_VIDEO_OPENGL_GLX */ |