dlls/x11drv/opengl.c

   1 /*
   2  * X11DRV OpenGL functions
   3  *
   4  * Copyright 2000 Lionel Ulmer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "x11drv.h"
  28 #include "wine/library.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(opengl);
  32
  33 #if defined(HAVE_GL_GL_H) && defined(HAVE_GL_GLX_H)
  34
  35 #undef APIENTRY
  36 #undef CALLBACK
  37 #undef WINAPI
  38
  39 #ifdef HAVE_GL_GL_H
  40 # include <GL/gl.h>
  41 #endif
  42 #ifdef HAVE_GL_GLX_H
  43 # include <GL/glx.h>
  44 #endif
  45 #ifdef HAVE_GL_GLEXT_H
  46 # include <GL/glext.h>
  47 #endif
  48
  49 #undef APIENTRY
  50 #undef CALLBACK
  51 #undef WINAPI
  52
  53 /* Redefines the constants */
  54 #define CALLBACK    __stdcall
  55 #define WINAPI      __stdcall
  56 #define APIENTRY    WINAPI
  57
  58
  59 static void dump_PIXELFORMATDESCRIPTOR(const PIXELFORMATDESCRIPTOR *ppfd) {
  60   DPRINTF("  - size / version : %d / %d\n", ppfd->nSize, ppfd->nVersion);
  61   DPRINTF("  - dwFlags : ");
  62 #define TEST_AND_DUMP(t,tv) if ((t) & (tv)) DPRINTF(#tv " ")
  63   TEST_AND_DUMP(ppfd->dwFlags, PFD_DEPTH_DONTCARE);
  64   TEST_AND_DUMP(ppfd->dwFlags, PFD_DOUBLEBUFFER);
  65   TEST_AND_DUMP(ppfd->dwFlags, PFD_DOUBLEBUFFER_DONTCARE);
  66   TEST_AND_DUMP(ppfd->dwFlags, PFD_DRAW_TO_WINDOW);
  67   TEST_AND_DUMP(ppfd->dwFlags, PFD_DRAW_TO_BITMAP);
  68   TEST_AND_DUMP(ppfd->dwFlags, PFD_GENERIC_ACCELERATED);
  69   TEST_AND_DUMP(ppfd->dwFlags, PFD_GENERIC_FORMAT);
  70   TEST_AND_DUMP(ppfd->dwFlags, PFD_NEED_PALETTE);
  71   TEST_AND_DUMP(ppfd->dwFlags, PFD_NEED_SYSTEM_PALETTE);
  72   TEST_AND_DUMP(ppfd->dwFlags, PFD_STEREO);
  73   TEST_AND_DUMP(ppfd->dwFlags, PFD_STEREO_DONTCARE);
  74   TEST_AND_DUMP(ppfd->dwFlags, PFD_SUPPORT_GDI);
  75   TEST_AND_DUMP(ppfd->dwFlags, PFD_SUPPORT_OPENGL);
  76   TEST_AND_DUMP(ppfd->dwFlags, PFD_SWAP_COPY);
  77   TEST_AND_DUMP(ppfd->dwFlags, PFD_SWAP_EXCHANGE);
  78   TEST_AND_DUMP(ppfd->dwFlags, PFD_SWAP_LAYER_BUFFERS);
  79 #undef TEST_AND_DUMP
  80   DPRINTF("\n");
  81
  82   DPRINTF("  - iPixelType : ");
  83   switch (ppfd->iPixelType) {
  84   case PFD_TYPE_RGBA: DPRINTF("PFD_TYPE_RGBA"); break;
  85   case PFD_TYPE_COLORINDEX: DPRINTF("PFD_TYPE_COLORINDEX"); break;
  86   }
  87   DPRINTF("\n");
  88
  89   DPRINTF("  - Color   : %d\n", ppfd->cColorBits);
  90   DPRINTF("  - Red     : %d\n", ppfd->cRedBits);
  91   DPRINTF("  - Green   : %d\n", ppfd->cGreenBits);
  92   DPRINTF("  - Blue    : %d\n", ppfd->cBlueBits);
  93   DPRINTF("  - Alpha   : %d\n", ppfd->cAlphaBits);
  94   DPRINTF("  - Accum   : %d\n", ppfd->cAccumBits);
  95   DPRINTF("  - Depth   : %d\n", ppfd->cDepthBits);
  96   DPRINTF("  - Stencil : %d\n", ppfd->cStencilBits);
  97   DPRINTF("  - Aux     : %d\n", ppfd->cAuxBuffers);
  98
  99   DPRINTF("  - iLayerType : ");
 100   switch (ppfd->iLayerType) {
 101   case PFD_MAIN_PLANE: DPRINTF("PFD_MAIN_PLANE"); break;
 102   case PFD_OVERLAY_PLANE: DPRINTF("PFD_OVERLAY_PLANE"); break;
 103   case (BYTE)PFD_UNDERLAY_PLANE: DPRINTF("PFD_UNDERLAY_PLANE"); break;
 104   }
 105   DPRINTF("\n");
 106 }
 107
 108 /* No need to load any other libraries as according to the ABI, libGL should be self-sufficient and
 109    include all dependencies
 110 */
 111 #ifndef SONAME_LIBGL
 112 #define SONAME_LIBGL "libGL.so"
 113 #endif
 114
 115 #define MAKE_FUNCPTR(f) static typeof(f) * p##f;
 116 MAKE_FUNCPTR(glGetError)
 117 MAKE_FUNCPTR(glXChooseVisual)
 118 MAKE_FUNCPTR(glXGetConfig)
 119 MAKE_FUNCPTR(glXSwapBuffers)
 120 MAKE_FUNCPTR(glXQueryExtension)
 121
 122 MAKE_FUNCPTR(glXGetFBConfigs)
 123 MAKE_FUNCPTR(glXChooseFBConfig)
 124 MAKE_FUNCPTR(glXGetFBConfigAttrib)
 125 #undef MAKE_FUNCPTR
 126
 127 static BOOL has_opengl(void)
 128 {
 129     static int init_done;
 130     static void *opengl_handle;
 131
 132     int error_base, event_base;
 133
 134     if (init_done) return (opengl_handle != NULL);
 135     init_done = 1;
 136
 137     opengl_handle = wine_dlopen(SONAME_LIBGL, RTLD_NOW|RTLD_GLOBAL, NULL, 0);
 138     if (opengl_handle == NULL) return FALSE;
 139
 140 #define LOAD_FUNCPTR(f) if((p##f = wine_dlsym(opengl_handle, #f, NULL, 0)) == NULL) goto sym_not_found;
 141 LOAD_FUNCPTR(glGetError)
 142 LOAD_FUNCPTR(glXChooseVisual)
 143 LOAD_FUNCPTR(glXGetConfig)
 144 LOAD_FUNCPTR(glXSwapBuffers)
 145 LOAD_FUNCPTR(glXQueryExtension)
 146
 147 LOAD_FUNCPTR(glXGetFBConfigs)
 148 LOAD_FUNCPTR(glXChooseFBConfig)
 149 LOAD_FUNCPTR(glXGetFBConfigAttrib)
 150 #undef LOAD_FUNCPTR
 151
 152     wine_tsx11_lock();
 153     if (pglXQueryExtension(gdi_display, &event_base, &error_base) == True) {
 154         TRACE("GLX is up and running error_base = %d\n", error_base);
 155     } else {
 156         wine_dlclose(opengl_handle, NULL, 0);
 157         opengl_handle = NULL;
 158     }
 159     wine_tsx11_unlock();
 160     return (opengl_handle != NULL);
 161
 162 sym_not_found:
 163     wine_dlclose(opengl_handle, NULL, 0);
 164     opengl_handle = NULL;
 165     return FALSE;
 166 }
 167
 168 #define TEST_AND_ADD1(t,a) if (t) att_list[att_pos++] = (a)
 169 #define TEST_AND_ADD2(t,a,b) if (t) { att_list[att_pos++] = (a); att_list[att_pos++] = (b); }
 170 #define NULL_TEST_AND_ADD2(tv,a,b) att_list[att_pos++] = (a); att_list[att_pos++] = ((tv) == 0 ? 0 : (b))
 171 #define ADD2(a,b) att_list[att_pos++] = (a); att_list[att_pos++] = (b)
 172
 173 /**
 174  * X11DRV_ChoosePixelFormat
 175  *
 176  * Equivalent of glXChooseVisual
 177  */
 178 int X11DRV_ChoosePixelFormat(X11DRV_PDEVICE *physDev,
 179                              const PIXELFORMATDESCRIPTOR *ppfd) {
 180   int att_list[64];
 181   int att_pos = 0;
 182   GLXFBConfig* cfgs = NULL;
 183   int ret = 0;
 184
 185   if (!has_opengl()) {
 186     ERR("No libGL on this box - disabling OpenGL support !\n");
 187     return 0;
 188   }
 189
 190   if (TRACE_ON(opengl)) {
 191     TRACE("(%p,%p)\n", physDev, ppfd);
 192
 193     dump_PIXELFORMATDESCRIPTOR((const PIXELFORMATDESCRIPTOR *) ppfd);
 194   }
 195
 196   if (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) {
 197     ERR("Flag not supported !\n");
 198     /* Should SetError here... */
 199     return 0;
 200   }
 201
 202   /* Now, build the request to GLX */
 203   TEST_AND_ADD2(ppfd->dwFlags & PFD_DOUBLEBUFFER, GLX_DOUBLEBUFFER, TRUE);
 204   TEST_AND_ADD1(ppfd->dwFlags & PFD_STEREO, GLX_STEREO);
 205
 206   if (ppfd->iPixelType == PFD_TYPE_COLORINDEX) {
 207     ADD2(GLX_BUFFER_SIZE, ppfd->cColorBits);
 208   }
 209   if (ppfd->iPixelType == PFD_TYPE_RGBA) {
 210     ADD2(GLX_RENDER_TYPE, GLX_RGBA_BIT);
 211     ADD2(GLX_BUFFER_SIZE, ppfd->cColorBits);
 212     if (32 == ppfd->cDepthBits) {
 213       /**
 214        * for 32 bpp depth buffers force to use 24.
 215        * needed as some drivers don't support 32bpp
 216        */
 217       TEST_AND_ADD2(ppfd->cDepthBits, GLX_DEPTH_SIZE, 24);
 218     } else {
 219       TEST_AND_ADD2(ppfd->cDepthBits, GLX_DEPTH_SIZE, ppfd->cDepthBits);
 220     }
 221     TEST_AND_ADD2(ppfd->cAlphaBits, GLX_ALPHA_SIZE, ppfd->cAlphaBits);
 222   }
 223   TEST_AND_ADD2(ppfd->cStencilBits, GLX_STENCIL_SIZE, ppfd->cStencilBits);
 224   TEST_AND_ADD2(ppfd->cAuxBuffers,  GLX_AUX_BUFFERS,  ppfd->cAuxBuffers);
 225
 226   /* These flags are not supported yet...
 227   ADD2(GLX_ACCUM_SIZE, ppfd->cAccumBits);
 228   */
 229   att_list[att_pos] = None;
 230
 231   wine_tsx11_lock();
 232   {
 233     int nCfgs = 0;
 234     int gl_test = 0;
 235     int fmt_id;
 236
 237     GLXFBConfig* cfgs_fmt = NULL;
 238     int nCfgs_fmt = 0;
 239     int tmp_fmt_id;
 240     UINT it_fmt;
 241
 242     cfgs = pglXChooseFBConfig(gdi_display, DefaultScreen(gdi_display), att_list, &nCfgs);
 243     if (NULL == cfgs || 0 == nCfgs) {
 244       ERR("glXChooseFBConfig returns NULL (glError: %d)\n", pglGetError());
 245       ret = 0;
 246       goto choose_exit;
 247     }
 248
 249     gl_test = pglXGetFBConfigAttrib(gdi_display, cfgs[0], GLX_FBCONFIG_ID, &fmt_id);
 250     if (gl_test) {
 251       ERR("Failed to retrieve FBCONFIG_ID from GLXFBConfig, expect problems.\n");
 252       ret = 0;
 253       goto choose_exit;
 254     }
 255
 256     cfgs_fmt = pglXGetFBConfigs(gdi_display, DefaultScreen(gdi_display), &nCfgs_fmt);
 257     if (NULL == cfgs_fmt) {
 258       ERR("Failed to get All FB Configs\n");
 259       ret = 0;
 260       goto choose_exit;
 261     }
 262
 263     for (it_fmt = 0; it_fmt < nCfgs_fmt; ++it_fmt) {
 264       gl_test = pglXGetFBConfigAttrib(gdi_display, cfgs_fmt[it_fmt], GLX_FBCONFIG_ID, &tmp_fmt_id);
 265       if (gl_test) {
 266         ERR("Failed to retrieve FBCONFIG_ID from GLXFBConfig, expect problems.\n");
 267         XFree(cfgs_fmt);
 268         ret = 0;
 269         goto choose_exit;
 270       }
 271       if (fmt_id == tmp_fmt_id) {
 272         ret = it_fmt + 1;
 273         break ;
 274       }
 275     }
 276     if (it_fmt == nCfgs_fmt) {
 277       ERR("Failed to get valid fmt for FBCONFIG_ID(%d)\n", fmt_id);
 278       ret = 0;
 279     }
 280     XFree(cfgs_fmt);
 281   }
 282
 283 choose_exit:
 284   if (NULL != cfgs) XFree(cfgs);
 285   wine_tsx11_unlock();
 286   return ret;
 287 }
 288
 289 /**
 290  * X11DRV_DescribePixelFormat
 291  *
 292  * Get the pixel-format descriptor associated to the given id
 293  */
 294 int X11DRV_DescribePixelFormat(X11DRV_PDEVICE *physDev,
 295                                int iPixelFormat,
 296                                UINT nBytes,
 297                                PIXELFORMATDESCRIPTOR *ppfd) {
 298   /*XVisualInfo *vis;*/
 299   int value;
 300   int rb,gb,bb,ab;
 301
 302   GLXFBConfig* cfgs = NULL;
 303   GLXFBConfig cur;
 304   int nCfgs = 0;
 305   int ret = 0;
 306
 307   if (!has_opengl()) {
 308     ERR("No libGL on this box - disabling OpenGL support !\n");
 309     return 0;
 310   }
 311
 312   TRACE("(%p,%d,%d,%p)\n", physDev, iPixelFormat, nBytes, ppfd);
 313
 314   wine_tsx11_lock();
 315   cfgs = pglXGetFBConfigs(gdi_display, DefaultScreen(gdi_display), &nCfgs);
 316   wine_tsx11_unlock();
 317
 318   if (NULL == cfgs || 0 == nCfgs) {
 319     ERR("unexpected iPixelFormat(%d), returns NULL\n", iPixelFormat);
 320     return 0; /* unespected error */
 321   }
 322
 323   if (ppfd == NULL) {
 324     /* The application is only querying the number of visuals */
 325     wine_tsx11_lock();
 326     if (NULL != cfgs) XFree(cfgs);
 327     wine_tsx11_unlock();
 328     return nCfgs;
 329   }
 330
 331   if (nBytes < sizeof(PIXELFORMATDESCRIPTOR)) {
 332     ERR("Wrong structure size !\n");
 333     /* Should set error */
 334     return 0;
 335   }
 336
 337   if (nCfgs < iPixelFormat) {
 338     ERR("unexpected iPixelFormat(%d) > nFormats(%d), returns NULL\n", iPixelFormat, nCfgs);
 339     return 0; /* unespected error */
 340   }
 341
 342   ret = nCfgs;
 343   cur = cfgs[iPixelFormat - 1];
 344
 345   memset(ppfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
 346   ppfd->nSize = sizeof(PIXELFORMATDESCRIPTOR);
 347   ppfd->nVersion = 1;
 348
 349   /* These flags are always the same... */
 350   ppfd->dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_GENERIC_ACCELERATED;
 351   /* Now the flags extraced from the Visual */
 352
 353   wine_tsx11_lock();
 354
 355   pglXGetFBConfigAttrib(gdi_display, cur, GLX_DOUBLEBUFFER, &value); if (value) ppfd->dwFlags |= PFD_DOUBLEBUFFER;
 356   pglXGetFBConfigAttrib(gdi_display, cur, GLX_STEREO, &value); if (value) ppfd->dwFlags |= PFD_STEREO;
 357
 358   /* Pixel type */
 359   pglXGetFBConfigAttrib(gdi_display, cur, GLX_RENDER_TYPE, &value);
 360   if (value & GLX_RGBA_BIT)
 361     ppfd->iPixelType = PFD_TYPE_RGBA;
 362   else
 363     ppfd->iPixelType = PFD_TYPE_COLORINDEX;
 364
 365   /* Color bits */
 366   pglXGetFBConfigAttrib(gdi_display, cur, GLX_BUFFER_SIZE, &value);
 367   ppfd->cColorBits = value;
 368
 369   /* Red, green, blue and alpha bits / shifts */
 370   if (ppfd->iPixelType == PFD_TYPE_RGBA) {
 371     pglXGetFBConfigAttrib(gdi_display, cur, GLX_RED_SIZE, &rb);
 372     pglXGetFBConfigAttrib(gdi_display, cur, GLX_GREEN_SIZE, &gb);
 373     pglXGetFBConfigAttrib(gdi_display, cur, GLX_BLUE_SIZE, &bb);
 374     pglXGetFBConfigAttrib(gdi_display, cur, GLX_ALPHA_SIZE, &ab);
 375
 376     ppfd->cRedBits = rb;
 377     ppfd->cRedShift = gb + bb + ab;
 378     ppfd->cBlueBits = bb;
 379     ppfd->cBlueShift = ab;
 380     ppfd->cGreenBits = gb;
 381     ppfd->cGreenShift = bb + ab;
 382     ppfd->cAlphaBits = ab;
 383     ppfd->cAlphaShift = 0;
 384   } else {
 385     ppfd->cRedBits = 0;
 386     ppfd->cRedShift = 0;
 387     ppfd->cBlueBits = 0;
 388     ppfd->cBlueShift = 0;
 389     ppfd->cGreenBits = 0;
 390     ppfd->cGreenShift = 0;
 391     ppfd->cAlphaBits = 0;
 392     ppfd->cAlphaShift = 0;
 393   }
 394   /* Accums : to do ... */
 395
 396   /* Depth bits */
 397   pglXGetFBConfigAttrib(gdi_display, cur, GLX_DEPTH_SIZE, &value);
 398   ppfd->cDepthBits = value;
 399
 400   /* stencil bits */
 401   pglXGetFBConfigAttrib(gdi_display, cur, GLX_STENCIL_SIZE, &value);
 402   ppfd->cStencilBits = value;
 403
 404   wine_tsx11_unlock();
 405
 406   /* Aux : to do ... */
 407
 408   ppfd->iLayerType = PFD_MAIN_PLANE;
 409
 410   if (TRACE_ON(opengl)) {
 411     dump_PIXELFORMATDESCRIPTOR(ppfd);
 412   }
 413
 414   wine_tsx11_lock();
 415   if (NULL != cfgs) XFree(cfgs);
 416   wine_tsx11_unlock();
 417
 418   return ret;
 419 }
 420
 421 /**
 422  * X11DRV_GetPixelFormat
 423  *
 424  * Get the pixel-format id used by this DC
 425  */
 426 int X11DRV_GetPixelFormat(X11DRV_PDEVICE *physDev) {
 427   TRACE("(%p): returns %d\n", physDev, physDev->current_pf);
 428
 429   return physDev->current_pf;
 430 }
 431
 432 /**
 433  * X11DRV_SetPixelFormat
 434  *
 435  * Set the pixel-format id used by this DC
 436  */
 437 BOOL X11DRV_SetPixelFormat(X11DRV_PDEVICE *physDev,
 438                            int iPixelFormat,
 439                            const PIXELFORMATDESCRIPTOR *ppfd) {
 440   TRACE("(%p,%d,%p)\n", physDev, iPixelFormat, ppfd);
 441
 442   physDev->current_pf = iPixelFormat;
 443
 444   return TRUE;
 445 }
 446
 447 /**
 448  * X11DRV_SwapBuffers
 449  *
 450  * Swap the buffers of this DC
 451  */
 452 BOOL X11DRV_SwapBuffers(X11DRV_PDEVICE *physDev) {
 453   if (!has_opengl()) {
 454     ERR("No libGL on this box - disabling OpenGL support !\n");
 455     return 0;
 456   }
 457
 458   TRACE("(%p)\n", physDev);
 459
 460   wine_tsx11_lock();
 461   pglXSwapBuffers(gdi_display, physDev->drawable);
 462   wine_tsx11_unlock();
 463
 464   return TRUE;
 465 }
 466
 467 /***********************************************************************
 468  *              X11DRV_setup_opengl_visual
 469  *
 470  * Setup the default visual used for OpenGL and Direct3D, and the desktop
 471  * window (if it exists).  If OpenGL isn't available, the visual is simply
 472  * set to the default visual for the display
 473  */
 474 XVisualInfo *X11DRV_setup_opengl_visual( Display *display )
 475 {
 476     XVisualInfo *visual = NULL;
 477     /* In order to support OpenGL or D3D, we require a double-buffered visual and stencil buffer support, */
 478     int dblBuf[] = {GLX_RGBA,GLX_DEPTH_SIZE, 16, GLX_STENCIL_SIZE, 8, GLX_DOUBLEBUFFER, None};
 479     if (!has_opengl()) return NULL;
 480
 481     wine_tsx11_lock();
 482     visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf);
 483     wine_tsx11_unlock();
 484     if (visual == NULL) {
 485         /* fallback to no stencil */
 486         int dblBuf2[] = {GLX_RGBA,GLX_DEPTH_SIZE, 16, GLX_DOUBLEBUFFER, None};
 487         WARN("Failed to get a visual with at least 8 bits of stencil\n");
 488
 489         wine_tsx11_lock();
 490         visual = pglXChooseVisual(display, DefaultScreen(display), dblBuf2);
 491         wine_tsx11_unlock();
 492         if (visual == NULL) {
 493             /* This should only happen if we cannot find a match with a depth size 16 */
 494             FIXME("Failed to find a suitable visual\n");
 495             return visual;
 496         }
 497     }
 498     TRACE("Visual ID %lx Chosen\n",visual->visualid);
 499     return visual;
 500 }
 501
 502 #else  /* no OpenGL includes */
 503
 504 void X11DRV_OpenGL_Init(Display *display)
 505 {
 506 }
 507
 508 /***********************************************************************
 509  *              ChoosePixelFormat (X11DRV.@)
 510  */
 511 int X11DRV_ChoosePixelFormat(X11DRV_PDEVICE *physDev,
 512                              const PIXELFORMATDESCRIPTOR *ppfd) {
 513   ERR("No OpenGL support compiled in.\n");
 514
 515   return 0;
 516 }
 517
 518 /***********************************************************************
 519  *              DescribePixelFormat (X11DRV.@)
 520  */
 521 int X11DRV_DescribePixelFormat(X11DRV_PDEVICE *physDev,
 522                                int iPixelFormat,
 523                                UINT nBytes,
 524                                PIXELFORMATDESCRIPTOR *ppfd) {
 525   ERR("No OpenGL support compiled in.\n");
 526
 527   return 0;
 528 }
 529
 530 /***********************************************************************
 531  *              GetPixelFormat (X11DRV.@)
 532  */
 533 int X11DRV_GetPixelFormat(X11DRV_PDEVICE *physDev) {
 534   ERR("No OpenGL support compiled in.\n");
 535
 536   return 0;
 537 }
 538
 539 /***********************************************************************
 540  *              SetPixelFormat (X11DRV.@)
 541  */
 542 BOOL X11DRV_SetPixelFormat(X11DRV_PDEVICE *physDev,
 543                            int iPixelFormat,
 544                            const PIXELFORMATDESCRIPTOR *ppfd) {
 545   ERR("No OpenGL support compiled in.\n");
 546
 547   return FALSE;
 548 }
 549
 550 /***********************************************************************
 551  *              SwapBuffers (X11DRV.@)
 552  */
 553 BOOL X11DRV_SwapBuffers(X11DRV_PDEVICE *physDev) {
 554   ERR("No OpenGL support compiled in.\n");
 555
 556   return FALSE;
 557 }
 558
 559 XVisualInfo *X11DRV_setup_opengl_visual( Display *display )
 560 {
 561   return NULL;
 562 }
 563
 564 #endif /* defined(HAVE_OPENGL) */