Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gl.c @ 392:71fe0b713085
*** empty log message ***
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 04 Jun 2002 22:30:40 +0000 |
| parents | f6ffac90895c |
| children | 8a43e0cbf02f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 | |
| 39 /* return the preferred visual to use for openGL graphics */ | |
| 40 XVisualInfo *X11_GL_GetVisual(_THIS) | |
| 41 { | |
| 42 #ifdef HAVE_OPENGL | |
| 43 /* 64 seems nice. */ | |
| 44 int attribs[64]; | |
| 45 int i; | |
| 46 | |
| 47 /* load the gl driver from a default path */ | |
| 48 if ( ! this->gl_config.driver_loaded ) { | |
| 49 /* no driver has been loaded, use default (ourselves) */ | |
| 50 if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { | |
| 51 return NULL; | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 /* See if we already have a window which we must use */ | |
| 56 if ( SDL_windowid ) { | |
| 57 XWindowAttributes a; | |
| 58 XVisualInfo vi_in; | |
| 59 int out_count; | |
| 60 | |
| 61 XGetWindowAttributes(SDL_Display, SDL_Window, &a); | |
| 62 vi_in.screen = SDL_Screen; | |
| 63 vi_in.visualid = XVisualIDFromVisual(a.visual); | |
| 64 glx_visualinfo = XGetVisualInfo(SDL_Display, | |
| 65 VisualScreenMask|VisualIDMask, &vi_in, &out_count); | |
| 66 return glx_visualinfo; | |
| 67 } | |
| 68 | |
| 69 /* Setup our GLX attributes according to the gl_config. */ | |
| 70 i = 0; | |
| 71 attribs[i++] = GLX_RGBA; | |
| 72 attribs[i++] = GLX_RED_SIZE; | |
| 73 attribs[i++] = this->gl_config.red_size; | |
| 74 attribs[i++] = GLX_GREEN_SIZE; | |
| 75 attribs[i++] = this->gl_config.green_size; | |
| 76 attribs[i++] = GLX_BLUE_SIZE; | |
| 77 attribs[i++] = this->gl_config.blue_size; | |
| 78 | |
| 79 if( this->gl_config.alpha_size ) { | |
| 80 attribs[i++] = GLX_ALPHA_SIZE; | |
| 81 attribs[i++] = this->gl_config.alpha_size; | |
| 82 } | |
| 83 | |
| 84 if( this->gl_config.buffer_size ) { | |
| 85 attribs[i++] = GLX_BUFFER_SIZE; | |
| 86 attribs[i++] = this->gl_config.buffer_size; | |
| 87 } | |
| 88 | |
| 89 if( this->gl_config.double_buffer ) { | |
| 90 attribs[i++] = GLX_DOUBLEBUFFER; | |
| 91 } | |
| 92 | |
| 93 attribs[i++] = GLX_DEPTH_SIZE; | |
| 94 attribs[i++] = this->gl_config.depth_size; | |
| 95 | |
| 96 if( this->gl_config.stencil_size ) { | |
| 97 attribs[i++] = GLX_STENCIL_SIZE; | |
| 98 attribs[i++] = this->gl_config.stencil_size; | |
| 99 } | |
| 100 | |
| 101 if( this->gl_config.accum_red_size ) { | |
| 102 attribs[i++] = GLX_ACCUM_RED_SIZE; | |
| 103 attribs[i++] = this->gl_config.accum_red_size; | |
| 104 } | |
| 105 | |
| 106 if( this->gl_config.accum_green_size ) { | |
| 107 attribs[i++] = GLX_ACCUM_GREEN_SIZE; | |
| 108 attribs[i++] = this->gl_config.accum_green_size; | |
| 109 } | |
| 110 | |
| 111 if( this->gl_config.accum_blue_size ) { | |
| 112 attribs[i++] = GLX_ACCUM_BLUE_SIZE; | |
| 113 attribs[i++] = this->gl_config.accum_blue_size; | |
| 114 } | |
| 115 | |
| 116 if( this->gl_config.accum_alpha_size ) { | |
| 117 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; | |
| 118 attribs[i++] = this->gl_config.accum_alpha_size; | |
| 119 } | |
| 120 | |
| 121 #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ | |
| 122 attribs[i++] = GLX_X_VISUAL_TYPE; | |
| 123 attribs[i++] = GLX_DIRECT_COLOR; | |
| 124 #endif | |
| 125 attribs[i++] = None; | |
| 126 | |
| 127 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 128 SDL_Screen, attribs); | |
| 129 #ifdef GLX_DIRECT_COLOR | |
| 130 if( !glx_visualinfo ) { /* No DirectColor visual? Try again.. */ | |
| 131 attribs[i-3] = None; | |
| 132 glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, | |
| 133 SDL_Screen, attribs); | |
| 134 } | |
| 135 #endif | |
| 136 if( !glx_visualinfo ) { | |
| 137 SDL_SetError( "Couldn't find matching GLX visual"); | |
| 138 return NULL; | |
| 139 } | |
| 140 return glx_visualinfo; | |
| 141 #else | |
| 142 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 143 return NULL; | |
| 144 #endif | |
| 145 } | |
| 146 | |
| 147 int X11_GL_CreateWindow(_THIS, int w, int h) | |
| 148 { | |
| 149 int retval; | |
| 150 #ifdef HAVE_OPENGL | |
| 151 XSetWindowAttributes attributes; | |
| 152 unsigned long mask; | |
| 153 unsigned long black; | |
| 154 | |
| 155 black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, | |
| 156 SDL_Screen)) | |
| 157 ? BlackPixel(SDL_Display, SDL_Screen) : 0; | |
| 158 attributes.background_pixel = black; | |
| 159 attributes.border_pixel = black; | |
| 160 attributes.colormap = SDL_XColorMap; | |
| 161 mask = CWBackPixel | CWBorderPixel | CWColormap; | |
| 162 | |
| 163 SDL_Window = XCreateWindow(SDL_Display, WMwindow, | |
| 164 0, 0, w, h, 0, glx_visualinfo->depth, | |
| 165 InputOutput, glx_visualinfo->visual, | |
| 166 mask, &attributes); | |
| 167 if ( !SDL_Window ) { | |
| 168 SDL_SetError("Could not create window"); | |
| 169 return -1; | |
| 170 } | |
| 171 retval = 0; | |
| 172 #else | |
| 173 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 174 retval = -1; | |
| 175 #endif | |
| 176 return(retval); | |
| 177 } | |
| 178 | |
| 179 int X11_GL_CreateContext(_THIS) | |
| 180 { | |
| 181 int retval; | |
| 182 #ifdef HAVE_OPENGL | |
| 183 /* We do this to create a clean separation between X and GLX errors. */ | |
| 184 XSync( SDL_Display, False ); | |
| 185 glx_context = this->gl_data->glXCreateContext(GFX_Display, | |
| 186 glx_visualinfo, NULL, True); | |
| 187 XSync( GFX_Display, False ); | |
| 188 | |
| 189 if (glx_context == NULL) { | |
| 190 SDL_SetError("Could not create GL context"); | |
| 191 return -1; | |
| 192 } | |
| 193 | |
| 194 gl_active = 1; | |
| 195 #else | |
| 196 SDL_SetError("X11 driver not configured with OpenGL"); | |
| 197 #endif | |
| 198 if ( gl_active ) { | |
| 199 retval = 0; | |
| 200 } else { | |
| 201 retval = -1; | |
| 202 } | |
| 203 return(retval); | |
| 204 } | |
| 205 | |
| 206 void X11_GL_Shutdown(_THIS) | |
| 207 { | |
| 208 #ifdef HAVE_OPENGL | |
| 209 /* Clean up OpenGL */ | |
| 210 if( glx_context ) { | |
| 211 this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); | |
| 212 | |
| 213 if (glx_context != NULL) | |
| 214 this->gl_data->glXDestroyContext(GFX_Display, glx_context); | |
| 215 | |
| 216 if( this->gl_data->glXReleaseBuffersMESA ) { | |
| 217 this->gl_data->glXReleaseBuffersMESA(GFX_Display,SDL_Window); | |
| 218 } | |
| 219 glx_context = NULL; | |
| 220 } | |
| 221 gl_active = 0; | |
| 222 #endif /* HAVE_OPENGL */ | |
| 223 } | |
| 224 | |
| 225 #ifdef HAVE_OPENGL | |
| 226 | |
| 227 /* Make the current context active */ | |
| 228 int X11_GL_MakeCurrent(_THIS) | |
| 229 { | |
| 230 int retval; | |
| 231 | |
| 232 retval = 0; | |
| 233 if ( ! this->gl_data->glXMakeCurrent(GFX_Display, | |
| 234 SDL_Window, glx_context) ) { | |
| 235 SDL_SetError("Unable to make GL context current"); | |
| 236 retval = -1; | |
| 237 } | |
| 238 XSync( GFX_Display, False ); | |
| 239 | |
| 240 /* More Voodoo X server workarounds... Grr... */ | |
| 241 SDL_Lock_EventThread(); | |
| 242 X11_CheckDGAMouse(this); | |
| 243 SDL_Unlock_EventThread(); | |
| 244 | |
| 245 return(retval); | |
| 246 } | |
| 247 | |
| 248 /* Get attribute data from glX. */ | |
| 249 int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
| 250 { | |
| 251 int retval; | |
| 252 int glx_attrib = None; | |
| 253 | |
| 254 switch( attrib ) { | |
| 255 case SDL_GL_RED_SIZE: | |
| 256 glx_attrib = GLX_RED_SIZE; | |
| 257 break; | |
| 258 case SDL_GL_GREEN_SIZE: | |
| 259 glx_attrib = GLX_GREEN_SIZE; | |
| 260 break; | |
| 261 case SDL_GL_BLUE_SIZE: | |
| 262 glx_attrib = GLX_BLUE_SIZE; | |
| 263 break; | |
| 264 case SDL_GL_ALPHA_SIZE: | |
| 265 glx_attrib = GLX_ALPHA_SIZE; | |
| 266 break; | |
| 267 case SDL_GL_DOUBLEBUFFER: | |
| 268 glx_attrib = GLX_DOUBLEBUFFER; | |
| 269 break; | |
| 270 case SDL_GL_BUFFER_SIZE: | |
| 271 glx_attrib = GLX_BUFFER_SIZE; | |
| 272 break; | |
| 273 case SDL_GL_DEPTH_SIZE: | |
| 274 glx_attrib = GLX_DEPTH_SIZE; | |
| 275 break; | |
| 276 case SDL_GL_STENCIL_SIZE: | |
| 277 glx_attrib = GLX_STENCIL_SIZE; | |
| 278 break; | |
| 279 case SDL_GL_ACCUM_RED_SIZE: | |
| 280 glx_attrib = GLX_ACCUM_RED_SIZE; | |
| 281 break; | |
| 282 case SDL_GL_ACCUM_GREEN_SIZE: | |
| 283 glx_attrib = GLX_ACCUM_GREEN_SIZE; | |
| 284 break; | |
| 285 case SDL_GL_ACCUM_BLUE_SIZE: | |
| 286 glx_attrib = GLX_ACCUM_BLUE_SIZE; | |
| 287 break; | |
| 288 case SDL_GL_ACCUM_ALPHA_SIZE: | |
| 289 glx_attrib = GLX_ACCUM_ALPHA_SIZE; | |
| 290 break; | |
| 291 default: | |
| 292 return(-1); | |
| 293 } | |
| 294 | |
| 295 retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); | |
| 296 | |
| 297 return retval; | |
| 298 } | |
| 299 | |
| 300 void X11_GL_SwapBuffers(_THIS) | |
| 301 { | |
| 302 this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); | |
| 303 } | |
| 304 | |
| 305 #endif /* HAVE_OPENGL */ | |
| 306 | |
| 307 void X11_GL_UnloadLibrary(_THIS) | |
| 308 { | |
| 309 #ifdef HAVE_OPENGL | |
| 310 if ( this->gl_config.driver_loaded ) { | |
| 311 dlclose(this->gl_config.dll_handle); | |
| 312 | |
| 313 this->gl_data->glXGetProcAddress = NULL; | |
| 314 this->gl_data->glXChooseVisual = NULL; | |
| 315 this->gl_data->glXCreateContext = NULL; | |
| 316 this->gl_data->glXDestroyContext = NULL; | |
| 317 this->gl_data->glXMakeCurrent = NULL; | |
| 318 this->gl_data->glXSwapBuffers = NULL; | |
| 319 | |
| 320 this->gl_config.dll_handle = NULL; | |
| 321 this->gl_config.driver_loaded = 0; | |
| 322 } | |
| 323 #endif | |
| 324 } | |
| 325 | |
| 326 #ifdef HAVE_OPENGL | |
| 327 | |
| 328 /* Passing a NULL path means load pointers from the application */ | |
| 329 int X11_GL_LoadLibrary(_THIS, const char* path) | |
| 330 { | |
| 331 void* handle; | |
| 332 int dlopen_flags; | |
| 333 | |
| 334 if ( gl_active ) { | |
| 335 SDL_SetError("OpenGL context already created"); | |
| 336 return -1; | |
| 337 } | |
| 338 | |
| 339 #ifdef RTLD_GLOBAL | |
| 340 dlopen_flags = RTLD_LAZY | RTLD_GLOBAL; | |
| 341 #else | |
| 342 dlopen_flags = RTLD_LAZY; | |
| 343 #endif | |
| 344 handle = dlopen(path, dlopen_flags); | |
| 345 /* Catch the case where the application isn't linked with GL */ | |
| 346 if ( (dlsym(handle, "glXChooseVisual") == NULL) && (path == NULL) ) { | |
| 347 dlclose(handle); | |
| 348 path = getenv("SDL_VIDEO_GL_DRIVER"); | |
| 349 if ( path == NULL ) { | |
| 350 path = DEFAULT_OPENGL; | |
| 351 } | |
| 352 handle = dlopen(path, dlopen_flags); | |
| 353 } | |
| 354 if ( handle == NULL ) { | |
| 355 SDL_SetError("Could not load OpenGL library"); | |
| 356 return -1; | |
| 357 } | |
| 358 | |
| 359 /* Unload the old driver and reset the pointers */ | |
| 360 X11_GL_UnloadLibrary(this); | |
| 361 | |
| 362 /* Load new function pointers */ | |
|
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363 this->gl_data->glXGetProcAddress = |
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364 (void *(*)(const GLubyte *)) dlsym(handle, "glXGetProcAddressARB"); |
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365 this->gl_data->glXChooseVisual = |
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366 (XVisualInfo *(*)(Display *, int, int *)) dlsym(handle, "glXChooseVisual"); |
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367 this->gl_data->glXCreateContext = |
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368 (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) dlsym(handle, "glXCreateContext"); |
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369 this->gl_data->glXDestroyContext = |
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370 (void (*)(Display *, GLXContext)) dlsym(handle, "glXDestroyContext"); |
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371 this->gl_data->glXMakeCurrent = |
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372 (int (*)(Display *, GLXDrawable, GLXContext)) dlsym(handle, "glXMakeCurrent"); |
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373 this->gl_data->glXSwapBuffers = |
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374 (void (*)(Display *, GLXDrawable)) dlsym(handle, "glXSwapBuffers"); |
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375 this->gl_data->glXGetConfig = |
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376 (int (*)(Display *, XVisualInfo *, int, int *)) dlsym(handle, "glXGetConfig"); |
| 0 | 377 /* We don't compare below for this in case we're not using Mesa. */ |
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378 this->gl_data->glXReleaseBuffersMESA = |
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379 (void (*)(Display *, GLXDrawable)) dlsym( handle, "glXReleaseBuffersMESA" ); |
| 0 | 380 |
| 381 if ( (this->gl_data->glXChooseVisual == NULL) || | |
| 382 (this->gl_data->glXCreateContext == NULL) || | |
| 383 (this->gl_data->glXDestroyContext == NULL) || | |
| 384 (this->gl_data->glXMakeCurrent == NULL) || | |
| 385 (this->gl_data->glXSwapBuffers == NULL) || | |
| 386 (this->gl_data->glXGetConfig == NULL) ) { | |
| 387 SDL_SetError("Could not retrieve OpenGL functions"); | |
| 388 return -1; | |
| 389 } | |
| 390 | |
| 391 this->gl_config.dll_handle = handle; | |
| 392 this->gl_config.driver_loaded = 1; | |
| 393 if ( path ) { | |
| 394 strncpy(this->gl_config.driver_path, path, | |
| 395 sizeof(this->gl_config.driver_path)-1); | |
| 396 } else { | |
| 397 strcpy(this->gl_config.driver_path, ""); | |
| 398 } | |
| 399 return 0; | |
| 400 } | |
| 401 | |
| 402 void *X11_GL_GetProcAddress(_THIS, const char* proc) | |
| 403 { | |
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404 static char procname[1024]; |
| 0 | 405 void* handle; |
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406 void* retval; |
| 0 | 407 |
| 408 handle = this->gl_config.dll_handle; | |
| 409 #if 0 /* This doesn't work correctly yet */ | |
| 410 if ( this->gl_data->glXGetProcAddress ) { | |
| 411 void *func, *func2; | |
| 412 func = this->gl_data->glXGetProcAddress(proc); | |
| 413 func2 = dlsym(handle, proc); | |
| 414 if ( func != func2 ) { | |
| 415 fprintf(stderr, "glXGetProcAddress returned %p and dlsym returned %p for %s\n", func, func2, proc); | |
| 416 } | |
| 417 return this->gl_data->glXGetProcAddress(proc); | |
| 418 } | |
| 419 #endif | |
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420 #if defined(__OpenBSD__) && !defined(__ELF__) |
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421 #undef dlsym(x,y); |
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422 #endif |
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423 retval = dlsym(handle, proc); |
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424 if (!retval && strlen(proc) <= 1022) { |
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425 procname[0] = '_'; |
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426 strcpy(procname + 1, proc); |
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427 retval = dlsym(handle, procname); |
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428 } |
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429 return retval; |
| 0 | 430 } |
| 431 | |
| 432 #endif /* HAVE_OPENGL */ |