glx_api.c revision 8329f4db6124de0578bd1def39f0d5845a9025af 
1d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)/*
2d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * Mesa 3-D graphics library
3d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * Version:  7.6
4d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) *
5d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
6d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
7d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) *
8d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * Permission is hereby granted, free of charge, to any person obtaining a
9d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * copy of this software and associated documentation files (the "Software"),
10d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * to deal in the Software without restriction, including without limitation
11d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * and/or sell copies of the Software, and to permit persons to whom the
13d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * Software is furnished to do so, subject to the following conditions:
14d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) *
15d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * The above copyright notice and this permission notice shall be included
16d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27/**
28 * "Fake" GLX API implemented in terms of the XMesa*() functions.
29 */
30
31
32
33#define GLX_GLXEXT_PROTOTYPES
34#include "GL/glx.h"
35
36#include "xm_api.h"
37
38
39/* This indicates the client-side GLX API and GLX encoder version. */
40#define CLIENT_MAJOR_VERSION 1
41#define CLIENT_MINOR_VERSION 4  /* but don't have 1.3's pbuffers, etc yet */
42
43/* This indicates the server-side GLX decoder version.
44 * GLX 1.4 indicates OpenGL 1.3 support
45 */
46#define SERVER_MAJOR_VERSION 1
47#define SERVER_MINOR_VERSION 4
48
49/* Who implemented this GLX? */
50#define VENDOR "Brian Paul"
51
52#define EXTENSIONS \
53   "GLX_MESA_copy_sub_buffer " \
54   "GLX_MESA_pixmap_colormap " \
55   "GLX_MESA_release_buffers " \
56   "GLX_ARB_get_proc_address " \
57   "GLX_EXT_texture_from_pixmap " \
58   "GLX_EXT_visual_info " \
59   "GLX_EXT_visual_rating " \
60   /*"GLX_SGI_video_sync "*/ \
61   "GLX_SGIX_fbconfig " \
62   "GLX_SGIX_pbuffer "
63
64#define DEFAULT_DIRECT GL_TRUE
65
66
67
68/**
69 * The GLXContext typedef is defined as a pointer to this structure.
70 */
71struct __GLXcontextRec
72{
73   Display *currentDpy;
74   GLboolean isDirect;
75   GLXDrawable currentDrawable;
76   GLXDrawable currentReadable;
77   XID xid;
78
79   XMesaContext xmesaContext;
80};
81
82
83
84static pipe_tsd ContextTSD;
85
86/** Set current context for calling thread */
87static void
88SetCurrentContext(GLXContext c)
89{
90   pipe_tsd_set(&ContextTSD, c);
91}
92
93/** Get current context for calling thread */
94static GLXContext
95GetCurrentContext(void)
96{
97   return pipe_tsd_get(&ContextTSD);
98}
99
100
101
102/**********************************************************************/
103/***                       GLX Visual Code                          ***/
104/**********************************************************************/
105
106#define DONT_CARE -1
107
108
109static XMesaVisual *VisualTable = NULL;
110static int NumVisuals = 0;
111
112
113
114/* Macro to handle c_class vs class field name in XVisualInfo struct */
115#if defined(__cplusplus) || defined(c_plusplus)
116#define CLASS c_class
117#else
118#define CLASS class
119#endif
120
121
122
123/*
124 * Test if the given XVisualInfo is usable for Mesa rendering.
125 */
126static GLboolean
127is_usable_visual( XVisualInfo *vinfo )
128{
129   switch (vinfo->CLASS) {
130      case StaticGray:
131      case GrayScale:
132         /* Any StaticGray/GrayScale visual works in RGB or CI mode */
133         return GL_TRUE;
134      case StaticColor:
135      case PseudoColor:
136	 /* Any StaticColor/PseudoColor visual of at least 4 bits */
137	 if (vinfo->depth>=4) {
138	    return GL_TRUE;
139	 }
140	 else {
141	    return GL_FALSE;
142	 }
143      case TrueColor:
144      case DirectColor:
145	 /* Any depth of TrueColor or DirectColor works in RGB mode */
146	 return GL_TRUE;
147      default:
148	 /* This should never happen */
149	 return GL_FALSE;
150   }
151}
152
153
154/*
155 * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
156 * configuration in our list of GLX visuals.
157 */
158static XMesaVisual
159save_glx_visual( Display *dpy, XVisualInfo *vinfo,
160                 GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
161                 GLboolean stereoFlag,
162                 GLint depth_size, GLint stencil_size,
163                 GLint accumRedSize, GLint accumGreenSize,
164                 GLint accumBlueSize, GLint accumAlphaSize,
165                 GLint level, GLint numAuxBuffers )
166{
167   GLboolean ximageFlag = GL_TRUE;
168   XMesaVisual xmvis;
169   GLint i;
170   GLboolean comparePointers;
171
172   if (dbFlag) {
173      /* Check if the MESA_BACK_BUFFER env var is set */
174      char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
175      if (backbuffer) {
176         if (backbuffer[0]=='p' || backbuffer[0]=='P') {
177            ximageFlag = GL_FALSE;
178         }
179         else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
180            ximageFlag = GL_TRUE;
181         }
182         else {
183            _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
184         }
185      }
186   }
187
188   if (stereoFlag) {
189      /* stereo not supported */
190      return NULL;
191   }
192
193   if (stencil_size > 0 && depth_size > 0)
194      depth_size = 24;
195
196   /* Comparing IDs uses less memory but sometimes fails. */
197   /* XXX revisit this after 3.0 is finished. */
198   if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
199      comparePointers = GL_TRUE;
200   else
201      comparePointers = GL_FALSE;
202
203   /* Force the visual to have an alpha channel */
204   if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
205      alphaFlag = GL_TRUE;
206
207   /* First check if a matching visual is already in the list */
208   for (i=0; i<NumVisuals; i++) {
209      XMesaVisual v = VisualTable[i];
210      if (v->display == dpy
211          && v->mesa_visual.level == level
212          && v->mesa_visual.numAuxBuffers == numAuxBuffers
213          && v->ximage_flag == ximageFlag
214          && v->mesa_visual.rgbMode == rgbFlag
215          && v->mesa_visual.doubleBufferMode == dbFlag
216          && v->mesa_visual.stereoMode == stereoFlag
217          && (v->mesa_visual.alphaBits > 0) == alphaFlag
218          && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
219          && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
220          && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
221          && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
222          && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
223          && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
224         /* now either compare XVisualInfo pointers or visual IDs */
225         if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
226             || (comparePointers && v->vishandle == vinfo)) {
227            return v;
228         }
229      }
230   }
231
232   /* Create a new visual and add it to the list. */
233
234   xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
235                              stereoFlag, ximageFlag,
236                              depth_size, stencil_size,
237                              accumRedSize, accumBlueSize,
238                              accumBlueSize, accumAlphaSize, 0, level,
239                              GLX_NONE_EXT );
240   if (xmvis) {
241      /* Save a copy of the pointer now so we can find this visual again
242       * if we need to search for it in find_glx_visual().
243       */
244      xmvis->vishandle = vinfo;
245      /* Allocate more space for additional visual */
246      VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
247                                   sizeof(XMesaVisual) * NumVisuals,
248                                   sizeof(XMesaVisual) * (NumVisuals + 1));
249      /* add xmvis to the list */
250      VisualTable[NumVisuals] = xmvis;
251      NumVisuals++;
252      /* XXX minor hack, because XMesaCreateVisual doesn't support an
253       * aux buffers parameter.
254       */
255      xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
256   }
257   return xmvis;
258}
259
260
261/**
262 * Return the default number of bits for the Z buffer.
263 * If defined, use the MESA_GLX_DEPTH_BITS env var value.
264 * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
265 * XXX probably do the same thing for stencil, accum, etc.
266 */
267static GLint
268default_depth_bits(void)
269{
270   int zBits;
271   const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
272   if (zEnv)
273      zBits = atoi(zEnv);
274   else
275      zBits = DEFAULT_SOFTWARE_DEPTH_BITS;
276   return zBits;
277}
278
279static GLint
280default_alpha_bits(void)
281{
282   int aBits;
283   const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
284   if (aEnv)
285      aBits = atoi(aEnv);
286   else
287      aBits = 0;
288   return aBits;
289}
290
291static GLint
292default_accum_bits(void)
293{
294   return 16;
295}
296
297
298
299/*
300 * Create a GLX visual from a regular XVisualInfo.
301 * This is called when Fake GLX is given an XVisualInfo which wasn't
302 * returned by glXChooseVisual.  Since this is the first time we're
303 * considering this visual we'll take a guess at reasonable values
304 * for depth buffer size, stencil size, accum size, etc.
305 * This is the best we can do with a client-side emulation of GLX.
306 */
307static XMesaVisual
308create_glx_visual( Display *dpy, XVisualInfo *visinfo )
309{
310   GLint zBits = default_depth_bits();
311   GLint accBits = default_accum_bits();
312   GLboolean alphaFlag = default_alpha_bits() > 0;
313
314   if (is_usable_visual( visinfo )) {
315      /* Configure this visual as RGB, double-buffered, depth-buffered. */
316      /* This is surely wrong for some people's needs but what else */
317      /* can be done?  They should use glXChooseVisual(). */
318      return save_glx_visual( dpy, visinfo,
319                              GL_TRUE,   /* rgb */
320                              alphaFlag, /* alpha */
321                              GL_TRUE,   /* double */
322                              GL_FALSE,  /* stereo */
323                              zBits,
324                              STENCIL_BITS,
325                              accBits, /* r */
326                              accBits, /* g */
327                              accBits, /* b */
328                              accBits, /* a */
329                              0,         /* level */
330                              0          /* numAux */
331         );
332   }
333   else {
334      _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
335      return NULL;
336   }
337}
338
339
340
341/*
342 * Find the GLX visual associated with an XVisualInfo.
343 */
344static XMesaVisual
345find_glx_visual( Display *dpy, XVisualInfo *vinfo )
346{
347   int i;
348
349   /* try to match visual id */
350   for (i=0;i<NumVisuals;i++) {
351      if (VisualTable[i]->display==dpy
352          && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
353         return VisualTable[i];
354      }
355   }
356
357   /* if that fails, try to match pointers */
358   for (i=0;i<NumVisuals;i++) {
359      if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
360         return VisualTable[i];
361      }
362   }
363
364   return NULL;
365}
366
367
368/**
369 * Try to get an X visual which matches the given arguments.
370 */
371static XVisualInfo *
372get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
373{
374   XVisualInfo temp, *vis;
375   long mask;
376   int n;
377   unsigned int default_depth;
378   int default_class;
379
380   mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
381   temp.screen = scr;
382   temp.depth = depth;
383   temp.CLASS = xclass;
384
385   default_depth = DefaultDepth(dpy,scr);
386   default_class = DefaultVisual(dpy,scr)->CLASS;
387
388   if (depth==default_depth && xclass==default_class) {
389      /* try to get root window's visual */
390      temp.visualid = DefaultVisual(dpy,scr)->visualid;
391      mask |= VisualIDMask;
392   }
393
394   vis = XGetVisualInfo( dpy, mask, &temp, &n );
395
396   /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
397    * An SGI Infinite Reality system, for example, can have 30bpp pixels:
398    * 10 bits per color channel.  Mesa's limited to a max of 8 bits/channel.
399    */
400   if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
401      if (_mesa_bitcount((GLuint) vis->red_mask  ) <= 8 &&
402          _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
403          _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
404         return vis;
405      }
406      else {
407         XFree((void *) vis);
408         return NULL;
409      }
410   }
411
412   return vis;
413}
414
415
416/*
417 * Retrieve the value of the given environment variable and find
418 * the X visual which matches it.
419 * Input:  dpy - the display
420 *         screen - the screen number
421 *         varname - the name of the environment variable
422 * Return:  an XVisualInfo pointer to NULL if error.
423 */
424static XVisualInfo *
425get_env_visual(Display *dpy, int scr, const char *varname)
426{
427   char value[100], type[100];
428   int depth, xclass = -1;
429   XVisualInfo *vis;
430
431   if (!_mesa_getenv( varname )) {
432      return NULL;
433   }
434
435   strncpy( value, _mesa_getenv(varname), 100 );
436   value[99] = 0;
437
438   sscanf( value, "%s %d", type, &depth );
439
440   if (strcmp(type,"TrueColor")==0)          xclass = TrueColor;
441   else if (strcmp(type,"DirectColor")==0)   xclass = DirectColor;
442   else if (strcmp(type,"PseudoColor")==0)   xclass = PseudoColor;
443   else if (strcmp(type,"StaticColor")==0)   xclass = StaticColor;
444   else if (strcmp(type,"GrayScale")==0)     xclass = GrayScale;
445   else if (strcmp(type,"StaticGray")==0)    xclass = StaticGray;
446
447   if (xclass>-1 && depth>0) {
448      vis = get_visual( dpy, scr, depth, xclass );
449      if (vis) {
450	 return vis;
451      }
452   }
453
454   _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
455                 type, depth);
456
457   return NULL;
458}
459
460
461
462/*
463 * Select an X visual which satisfies the RGBA flag and minimum depth.
464 * Input:  dpy,
465 *         screen - X display and screen number
466 *         min_depth - minimum visual depth
467 *         preferred_class - preferred GLX visual class or DONT_CARE
468 * Return:  pointer to an XVisualInfo or NULL.
469 */
470static XVisualInfo *
471choose_x_visual( Display *dpy, int screen, int min_depth,
472                 int preferred_class )
473{
474   XVisualInfo *vis;
475   int xclass, visclass = 0;
476   int depth;
477
478   /* First see if the MESA_RGB_VISUAL env var is defined */
479   vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
480   if (vis) {
481      return vis;
482   }
483   /* Otherwise, search for a suitable visual */
484   if (preferred_class==DONT_CARE) {
485      for (xclass=0;xclass<6;xclass++) {
486         switch (xclass) {
487         case 0:  visclass = TrueColor;    break;
488         case 1:  visclass = DirectColor;  break;
489         case 2:  visclass = PseudoColor;  break;
490         case 3:  visclass = StaticColor;  break;
491         case 4:  visclass = GrayScale;    break;
492         case 5:  visclass = StaticGray;   break;
493         }
494         if (min_depth==0) {
495            /* start with shallowest */
496            for (depth=0;depth<=32;depth++) {
497               if (visclass==TrueColor && depth==8) {
498                  /* Special case:  try to get 8-bit PseudoColor before */
499                  /* 8-bit TrueColor */
500                  vis = get_visual( dpy, screen, 8, PseudoColor );
501                  if (vis) {
502                     return vis;
503                  }
504               }
505               vis = get_visual( dpy, screen, depth, visclass );
506               if (vis) {
507                  return vis;
508               }
509            }
510         }
511         else {
512            /* start with deepest */
513            for (depth=32;depth>=min_depth;depth--) {
514               if (visclass==TrueColor && depth==8) {
515                  /* Special case:  try to get 8-bit PseudoColor before */
516                  /* 8-bit TrueColor */
517                  vis = get_visual( dpy, screen, 8, PseudoColor );
518                  if (vis) {
519                     return vis;
520                  }
521               }
522               vis = get_visual( dpy, screen, depth, visclass );
523               if (vis) {
524                  return vis;
525               }
526            }
527         }
528      }
529   }
530   else {
531      /* search for a specific visual class */
532      switch (preferred_class) {
533      case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
534      case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
535      case GLX_PSEUDO_COLOR_EXT:  visclass = PseudoColor;  break;
536      case GLX_STATIC_COLOR_EXT:  visclass = StaticColor;  break;
537      case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
538      case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
539      default:   return NULL;
540      }
541      if (min_depth==0) {
542         /* start with shallowest */
543         for (depth=0;depth<=32;depth++) {
544            vis = get_visual( dpy, screen, depth, visclass );
545            if (vis) {
546               return vis;
547            }
548         }
549      }
550      else {
551         /* start with deepest */
552         for (depth=32;depth>=min_depth;depth--) {
553            vis = get_visual( dpy, screen, depth, visclass );
554            if (vis) {
555               return vis;
556            }
557         }
558      }
559   }
560
561   /* didn't find a visual */
562   return NULL;
563}
564
565
566
567
568/**********************************************************************/
569/***             Display-related functions                          ***/
570/**********************************************************************/
571
572
573/**
574 * Free all XMesaVisuals which are associated with the given display.
575 */
576static void
577destroy_visuals_on_display(Display *dpy)
578{
579   int i;
580   for (i = 0; i < NumVisuals; i++) {
581      if (VisualTable[i]->display == dpy) {
582         /* remove this visual */
583         int j;
584         free(VisualTable[i]);
585         for (j = i; j < NumVisuals - 1; j++)
586            VisualTable[j] = VisualTable[j + 1];
587         NumVisuals--;
588      }
589   }
590}
591
592
593/**
594 * Called from XCloseDisplay() to let us free our display-related data.
595 */
596static int
597close_display_callback(Display *dpy, XExtCodes *codes)
598{
599   xmesa_destroy_buffers_on_display(dpy);
600   destroy_visuals_on_display(dpy);
601   return 0;
602}
603
604
605/**
606 * Look for the named extension on given display and return a pointer
607 * to the _XExtension data, or NULL if extension not found.
608 */
609static _XExtension *
610lookup_extension(Display *dpy, const char *extName)
611{
612   _XExtension *ext;
613   for (ext = dpy->ext_procs; ext; ext = ext->next) {
614      if (ext->name && strcmp(ext->name, extName) == 0) {
615         return ext;
616      }
617   }
618   return NULL;
619}
620
621
622/**
623 * Whenever we're given a new Display pointer, call this function to
624 * register our close_display_callback function.
625 */
626static void
627register_with_display(Display *dpy)
628{
629   const char *extName = "MesaGLX";
630   _XExtension *ext;
631
632   ext = lookup_extension(dpy, extName);
633   if (!ext) {
634      XExtCodes *c = XAddExtension(dpy);
635      ext = dpy->ext_procs;  /* new extension is at head of list */
636      assert(c->extension == ext->codes.extension);
637      (void) c;
638      ext->name = _mesa_strdup(extName);
639      ext->close_display = close_display_callback;
640   }
641}
642
643
644/**********************************************************************/
645/***                  Begin Fake GLX API Functions                  ***/
646/**********************************************************************/
647
648
649/**
650 * Helper used by glXChooseVisual and glXChooseFBConfig.
651 * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
652 * the later.
653 * In either case, the attribute list is terminated with the value 'None'.
654 */
655static XMesaVisual
656choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
657{
658   const GLboolean rgbModeDefault = fbConfig;
659   const int *parselist;
660   XVisualInfo *vis;
661   int min_ci = 0;
662   int min_red=0, min_green=0, min_blue=0;
663   GLboolean rgb_flag = rgbModeDefault;
664   GLboolean alpha_flag = GL_FALSE;
665   GLboolean double_flag = GL_FALSE;
666   GLboolean stereo_flag = GL_FALSE;
667   GLint depth_size = 0;
668   GLint stencil_size = 0;
669   GLint accumRedSize = 0;
670   GLint accumGreenSize = 0;
671   GLint accumBlueSize = 0;
672   GLint accumAlphaSize = 0;
673   int level = 0;
674   int visual_type = DONT_CARE;
675   int trans_type = DONT_CARE;
676   int trans_value = DONT_CARE;
677   GLint caveat = DONT_CARE;
678   XMesaVisual xmvis = NULL;
679   int desiredVisualID = -1;
680   int numAux = 0;
681
682   xmesa_init( dpy );
683
684   parselist = list;
685
686   while (*parselist) {
687
688      switch (*parselist) {
689	 case GLX_USE_GL:
690            if (fbConfig) {
691               /* invalid token */
692               return NULL;
693            }
694            else {
695               /* skip */
696               parselist++;
697            }
698	    break;
699	 case GLX_BUFFER_SIZE:
700	    parselist++;
701	    min_ci = *parselist++;
702	    break;
703	 case GLX_LEVEL:
704	    parselist++;
705            level = *parselist++;
706	    break;
707	 case GLX_RGBA:
708            if (fbConfig) {
709               /* invalid token */
710               return NULL;
711            }
712            else {
713               rgb_flag = GL_TRUE;
714               parselist++;
715            }
716	    break;
717	 case GLX_DOUBLEBUFFER:
718            parselist++;
719            if (fbConfig) {
720               double_flag = *parselist++;
721            }
722            else {
723               double_flag = GL_TRUE;
724            }
725	    break;
726	 case GLX_STEREO:
727            parselist++;
728            if (fbConfig) {
729               stereo_flag = *parselist++;
730            }
731            else {
732               stereo_flag = GL_TRUE;
733            }
734            break;
735	 case GLX_AUX_BUFFERS:
736	    parselist++;
737            numAux = *parselist++;
738            if (numAux > MAX_AUX_BUFFERS)
739               return NULL;
740	    break;
741	 case GLX_RED_SIZE:
742	    parselist++;
743	    min_red = *parselist++;
744	    break;
745	 case GLX_GREEN_SIZE:
746	    parselist++;
747	    min_green = *parselist++;
748	    break;
749	 case GLX_BLUE_SIZE:
750	    parselist++;
751	    min_blue = *parselist++;
752	    break;
753	 case GLX_ALPHA_SIZE:
754	    parselist++;
755            {
756               GLint size = *parselist++;
757               alpha_flag = size ? GL_TRUE : GL_FALSE;
758            }
759	    break;
760	 case GLX_DEPTH_SIZE:
761	    parselist++;
762	    depth_size = *parselist++;
763	    break;
764	 case GLX_STENCIL_SIZE:
765	    parselist++;
766	    stencil_size = *parselist++;
767	    break;
768	 case GLX_ACCUM_RED_SIZE:
769	    parselist++;
770            {
771               GLint size = *parselist++;
772               accumRedSize = MAX2( accumRedSize, size );
773            }
774            break;
775	 case GLX_ACCUM_GREEN_SIZE:
776	    parselist++;
777            {
778               GLint size = *parselist++;
779               accumGreenSize = MAX2( accumGreenSize, size );
780            }
781            break;
782	 case GLX_ACCUM_BLUE_SIZE:
783	    parselist++;
784            {
785               GLint size = *parselist++;
786               accumBlueSize = MAX2( accumBlueSize, size );
787            }
788            break;
789	 case GLX_ACCUM_ALPHA_SIZE:
790	    parselist++;
791            {
792               GLint size = *parselist++;
793               accumAlphaSize = MAX2( accumAlphaSize, size );
794            }
795	    break;
796
797         /*
798          * GLX_EXT_visual_info extension
799          */
800         case GLX_X_VISUAL_TYPE_EXT:
801            parselist++;
802            visual_type = *parselist++;
803            break;
804         case GLX_TRANSPARENT_TYPE_EXT:
805            parselist++;
806            trans_type = *parselist++;
807            break;
808         case GLX_TRANSPARENT_INDEX_VALUE_EXT:
809            parselist++;
810            trans_value = *parselist++;
811            break;
812         case GLX_TRANSPARENT_RED_VALUE_EXT:
813         case GLX_TRANSPARENT_GREEN_VALUE_EXT:
814         case GLX_TRANSPARENT_BLUE_VALUE_EXT:
815         case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
816	    /* ignore */
817	    parselist++;
818	    parselist++;
819	    break;
820
821         /*
822          * GLX_EXT_visual_info extension
823          */
824         case GLX_VISUAL_CAVEAT_EXT:
825            parselist++;
826            caveat = *parselist++; /* ignored for now */
827            break;
828
829         /*
830          * GLX_ARB_multisample
831          */
832         case GLX_SAMPLE_BUFFERS_ARB:
833            /* ms not supported */
834            return NULL;
835         case GLX_SAMPLES_ARB:
836            /* ms not supported */
837            return NULL;
838
839         /*
840          * FBConfig attribs.
841          */
842         case GLX_RENDER_TYPE:
843            if (!fbConfig)
844               return NULL;
845            parselist++;
846            if (*parselist & GLX_RGBA_BIT) {
847               rgb_flag = GL_TRUE;
848            }
849            else if (*parselist & GLX_COLOR_INDEX_BIT) {
850               rgb_flag = GL_FALSE;
851            }
852            else if (*parselist == 0) {
853               rgb_flag = GL_TRUE;
854            }
855            parselist++;
856            break;
857         case GLX_DRAWABLE_TYPE:
858            if (!fbConfig)
859               return NULL;
860            parselist++;
861            if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
862               return NULL; /* bad bit */
863            }
864            parselist++;
865            break;
866         case GLX_FBCONFIG_ID:
867            if (!fbConfig)
868               return NULL;
869            parselist++;
870            desiredVisualID = *parselist++;
871            break;
872         case GLX_X_RENDERABLE:
873            if (!fbConfig)
874               return NULL;
875            parselist += 2;
876            /* ignore */
877            break;
878
879#ifdef GLX_EXT_texture_from_pixmap
880         case GLX_BIND_TO_TEXTURE_RGB_EXT:
881            parselist++; /*skip*/
882            break;
883         case GLX_BIND_TO_TEXTURE_RGBA_EXT:
884            parselist++; /*skip*/
885            break;
886         case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
887            parselist++; /*skip*/
888            break;
889         case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
890            parselist++;
891            if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
892                               GLX_TEXTURE_2D_BIT_EXT |
893                               GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
894               /* invalid bit */
895               return NULL;
896            }
897            break;
898         case GLX_Y_INVERTED_EXT:
899            parselist++; /*skip*/
900            break;
901#endif
902
903	 case None:
904            /* end of list */
905	    break;
906
907	 default:
908	    /* undefined attribute */
909            _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
910                          *parselist);
911	    return NULL;
912      }
913   }
914
915   (void) caveat;
916
917
918   /*
919    * Since we're only simulating the GLX extension this function will never
920    * find any real GL visuals.  Instead, all we can do is try to find an RGB
921    * or CI visual of appropriate depth.  Other requested attributes such as
922    * double buffering, depth buffer, etc. will be associated with the X
923    * visual and stored in the VisualTable[].
924    */
925   if (desiredVisualID != -1) {
926      /* try to get a specific visual, by visualID */
927      XVisualInfo temp;
928      int n;
929      temp.visualid = desiredVisualID;
930      temp.screen = screen;
931      vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
932      if (vis) {
933         /* give the visual some useful GLX attributes */
934         double_flag = GL_TRUE;
935         rgb_flag = GL_TRUE;
936      }
937   }
938   else if (level==0) {
939      /* normal color planes */
940      /* Get an RGB visual */
941      int min_rgb = min_red + min_green + min_blue;
942      if (min_rgb>1 && min_rgb<8) {
943         /* a special case to be sure we can get a monochrome visual */
944         min_rgb = 1;
945      }
946      vis = choose_x_visual( dpy, screen, min_rgb, visual_type );
947   }
948   else {
949      _mesa_warning(NULL, "overlay not supported");
950      return NULL;
951   }
952
953   if (vis) {
954      /* Note: we're not exactly obeying the glXChooseVisual rules here.
955       * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
956       * largest depth buffer size, which is 32bits/value.  Instead, we
957       * return 16 to maintain performance with earlier versions of Mesa.
958       */
959      if (stencil_size > 0)
960         depth_size = 24;  /* if Z and stencil, always use 24+8 format */
961      else if (depth_size > 24)
962         depth_size = 32;
963      else if (depth_size > 16)
964         depth_size = 24;
965      else if (depth_size > 0) {
966         depth_size = default_depth_bits();
967      }
968
969      if (!alpha_flag) {
970         alpha_flag = default_alpha_bits() > 0;
971      }
972
973      /* we only support one size of stencil and accum buffers. */
974      if (stencil_size > 0)
975         stencil_size = STENCIL_BITS;
976
977      if (accumRedSize > 0 ||
978          accumGreenSize > 0 ||
979          accumBlueSize > 0 ||
980          accumAlphaSize > 0) {
981
982         accumRedSize =
983            accumGreenSize =
984            accumBlueSize = default_accum_bits();
985
986         accumAlphaSize = alpha_flag ? accumRedSize : 0;
987      }
988
989      xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
990                               stereo_flag, depth_size, stencil_size,
991                               accumRedSize, accumGreenSize,
992                               accumBlueSize, accumAlphaSize, level, numAux );
993   }
994
995   return xmvis;
996}
997
998
999PUBLIC XVisualInfo *
1000glXChooseVisual( Display *dpy, int screen, int *list )
1001{
1002   XMesaVisual xmvis;
1003
1004   /* register ourselves as an extension on this display */
1005   register_with_display(dpy);
1006
1007   xmvis = choose_visual(dpy, screen, list, GL_FALSE);
1008   if (xmvis) {
1009      /* create a new vishandle - the cached one may be stale */
1010      xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1011      if (xmvis->vishandle) {
1012         memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1013      }
1014      return xmvis->vishandle;
1015   }
1016   else
1017      return NULL;
1018}
1019
1020
1021PUBLIC GLXContext
1022glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1023                  GLXContext share_list, Bool direct )
1024{
1025   XMesaVisual xmvis;
1026   GLXContext glxCtx;
1027   GLXContext shareCtx = share_list;
1028
1029   if (!dpy || !visinfo)
1030      return 0;
1031
1032   glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1033   if (!glxCtx)
1034      return 0;
1035
1036   /* deallocate unused windows/buffers */
1037#if 0
1038   XMesaGarbageCollect();
1039#endif
1040
1041   xmvis = find_glx_visual( dpy, visinfo );
1042   if (!xmvis) {
1043      /* This visual wasn't found with glXChooseVisual() */
1044      xmvis = create_glx_visual( dpy, visinfo );
1045      if (!xmvis) {
1046         /* unusable visual */
1047         free(glxCtx);
1048         return NULL;
1049      }
1050   }
1051
1052   glxCtx->xmesaContext = XMesaCreateContext(xmvis,
1053                                   shareCtx ? shareCtx->xmesaContext : NULL);
1054   if (!glxCtx->xmesaContext) {
1055      free(glxCtx);
1056      return NULL;
1057   }
1058
1059   glxCtx->isDirect = DEFAULT_DIRECT;
1060   glxCtx->currentDpy = dpy;
1061   glxCtx->xid = (XID) glxCtx;  /* self pointer */
1062
1063   return glxCtx;
1064}
1065
1066
1067/* XXX these may have to be removed due to thread-safety issues. */
1068static GLXContext MakeCurrent_PrevContext = 0;
1069static GLXDrawable MakeCurrent_PrevDrawable = 0;
1070static GLXDrawable MakeCurrent_PrevReadable = 0;
1071static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1072static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1073
1074
1075/* GLX 1.3 and later */
1076PUBLIC Bool
1077glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1078                       GLXDrawable read, GLXContext ctx )
1079{
1080   GLXContext glxCtx = ctx;
1081   static boolean firsttime = 1, no_rast = 0;
1082
1083   if (firsttime) {
1084      no_rast = getenv("SP_NO_RAST") != NULL;
1085      firsttime = 0;
1086   }
1087
1088   if (ctx && draw && read) {
1089      XMesaBuffer drawBuffer, readBuffer;
1090      XMesaContext xmctx = glxCtx->xmesaContext;
1091
1092      /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1093      if (ctx == MakeCurrent_PrevContext
1094          && draw == MakeCurrent_PrevDrawable) {
1095         drawBuffer = MakeCurrent_PrevDrawBuffer;
1096      }
1097      else {
1098         drawBuffer = XMesaFindBuffer( dpy, draw );
1099      }
1100      if (!drawBuffer) {
1101         /* drawable must be a new window! */
1102         drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1103         if (!drawBuffer) {
1104            /* Out of memory, or context/drawable depth mismatch */
1105            return False;
1106         }
1107      }
1108
1109      /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1110      if (ctx == MakeCurrent_PrevContext
1111          && read == MakeCurrent_PrevReadable) {
1112         readBuffer = MakeCurrent_PrevReadBuffer;
1113      }
1114      else {
1115         readBuffer = XMesaFindBuffer( dpy, read );
1116      }
1117      if (!readBuffer) {
1118         /* drawable must be a new window! */
1119         readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1120         if (!readBuffer) {
1121            /* Out of memory, or context/drawable depth mismatch */
1122            return False;
1123         }
1124      }
1125
1126      if (no_rast &&
1127          MakeCurrent_PrevContext == ctx &&
1128          MakeCurrent_PrevDrawable == draw &&
1129          MakeCurrent_PrevReadable == read &&
1130          MakeCurrent_PrevDrawBuffer == drawBuffer &&
1131          MakeCurrent_PrevReadBuffer == readBuffer)
1132         return True;
1133
1134      MakeCurrent_PrevContext = ctx;
1135      MakeCurrent_PrevDrawable = draw;
1136      MakeCurrent_PrevReadable = read;
1137      MakeCurrent_PrevDrawBuffer = drawBuffer;
1138      MakeCurrent_PrevReadBuffer = readBuffer;
1139
1140      /* Now make current! */
1141      if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1142         ctx->currentDpy = dpy;
1143         ctx->currentDrawable = draw;
1144         ctx->currentReadable = read;
1145         SetCurrentContext(ctx);
1146         return True;
1147      }
1148      else {
1149         return False;
1150      }
1151   }
1152   else if (!ctx && !draw && !read) {
1153      /* release current context w/out assigning new one. */
1154      XMesaMakeCurrent2( NULL, NULL, NULL );
1155      MakeCurrent_PrevContext = 0;
1156      MakeCurrent_PrevDrawable = 0;
1157      MakeCurrent_PrevReadable = 0;
1158      MakeCurrent_PrevDrawBuffer = 0;
1159      MakeCurrent_PrevReadBuffer = 0;
1160      SetCurrentContext(NULL);
1161      return True;
1162   }
1163   else {
1164      /* The args must either all be non-zero or all zero.
1165       * This is an error.
1166       */
1167      return False;
1168   }
1169}
1170
1171
1172PUBLIC Bool
1173glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1174{
1175   return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1176}
1177
1178
1179PUBLIC GLXContext
1180glXGetCurrentContext(void)
1181{
1182   return GetCurrentContext();
1183}
1184
1185
1186PUBLIC Display *
1187glXGetCurrentDisplay(void)
1188{
1189   GLXContext glxCtx = glXGetCurrentContext();
1190
1191   return glxCtx ? glxCtx->currentDpy : NULL;
1192}
1193
1194
1195PUBLIC Display *
1196glXGetCurrentDisplayEXT(void)
1197{
1198   return glXGetCurrentDisplay();
1199}
1200
1201
1202PUBLIC GLXDrawable
1203glXGetCurrentDrawable(void)
1204{
1205   GLXContext gc = glXGetCurrentContext();
1206   return gc ? gc->currentDrawable : 0;
1207}
1208
1209
1210PUBLIC GLXDrawable
1211glXGetCurrentReadDrawable(void)
1212{
1213   GLXContext gc = glXGetCurrentContext();
1214   return gc ? gc->currentReadable : 0;
1215}
1216
1217
1218PUBLIC GLXDrawable
1219glXGetCurrentReadDrawableSGI(void)
1220{
1221   return glXGetCurrentReadDrawable();
1222}
1223
1224
1225PUBLIC GLXPixmap
1226glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1227{
1228   XMesaVisual v;
1229   XMesaBuffer b;
1230
1231   v = find_glx_visual( dpy, visinfo );
1232   if (!v) {
1233      v = create_glx_visual( dpy, visinfo );
1234      if (!v) {
1235         /* unusable visual */
1236         return 0;
1237      }
1238   }
1239
1240   b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1241   if (!b) {
1242      return 0;
1243   }
1244   return b->drawable;
1245}
1246
1247
1248/*** GLX_MESA_pixmap_colormap ***/
1249
1250PUBLIC GLXPixmap
1251glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1252                        Pixmap pixmap, Colormap cmap )
1253{
1254   XMesaVisual v;
1255   XMesaBuffer b;
1256
1257   v = find_glx_visual( dpy, visinfo );
1258   if (!v) {
1259      v = create_glx_visual( dpy, visinfo );
1260      if (!v) {
1261         /* unusable visual */
1262         return 0;
1263      }
1264   }
1265
1266   b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1267   if (!b) {
1268      return 0;
1269   }
1270   return b->drawable;
1271}
1272
1273
1274PUBLIC void
1275glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1276{
1277   XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1278   if (b) {
1279      XMesaDestroyBuffer(b);
1280   }
1281   else if (_mesa_getenv("MESA_DEBUG")) {
1282      _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1283   }
1284}
1285
1286
1287PUBLIC void
1288glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1289                unsigned long mask )
1290{
1291   XMesaContext xm_src = src->xmesaContext;
1292   XMesaContext xm_dst = dst->xmesaContext;
1293   (void) dpy;
1294   if (MakeCurrent_PrevContext == src) {
1295      glFlush();
1296   }
1297   XMesaCopyContext(xm_src, xm_dst, mask);
1298}
1299
1300
1301PUBLIC Bool
1302glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1303{
1304   int op, ev, err;
1305   /* Mesa's GLX isn't really an X extension but we try to act like one. */
1306   if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1307      ev = err = 0;
1308   if (errorBase)
1309      *errorBase = err;
1310   if (eventBase)
1311      *eventBase = ev;
1312   return True; /* we're faking GLX so always return success */
1313}
1314
1315
1316PUBLIC void
1317glXDestroyContext( Display *dpy, GLXContext ctx )
1318{
1319   GLXContext glxCtx = ctx;
1320   (void) dpy;
1321   MakeCurrent_PrevContext = 0;
1322   MakeCurrent_PrevDrawable = 0;
1323   MakeCurrent_PrevReadable = 0;
1324   MakeCurrent_PrevDrawBuffer = 0;
1325   MakeCurrent_PrevReadBuffer = 0;
1326   XMesaDestroyContext( glxCtx->xmesaContext );
1327   XMesaGarbageCollect();
1328   free(glxCtx);
1329}
1330
1331
1332PUBLIC Bool
1333glXIsDirect( Display *dpy, GLXContext ctx )
1334{
1335   GLXContext glxCtx = ctx;
1336   (void) ctx;
1337   return glxCtx->isDirect;
1338}
1339
1340
1341
1342PUBLIC void
1343glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1344{
1345   XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1346   static boolean firsttime = 1, no_rast = 0;
1347
1348   if (firsttime) {
1349      no_rast = getenv("SP_NO_RAST") != NULL;
1350      firsttime = 0;
1351   }
1352
1353   if (no_rast)
1354      return;
1355
1356   if (buffer) {
1357      XMesaSwapBuffers(buffer);
1358   }
1359   else if (_mesa_getenv("MESA_DEBUG")) {
1360      _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1361                    (int) drawable);
1362   }
1363}
1364
1365
1366
1367/*** GLX_MESA_copy_sub_buffer ***/
1368
1369PUBLIC void
1370glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
1371                     int x, int y, int width, int height)
1372{
1373   XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1374   if (buffer) {
1375      XMesaCopySubBuffer(buffer, x, y, width, height);
1376   }
1377   else if (_mesa_getenv("MESA_DEBUG")) {
1378      _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1379   }
1380}
1381
1382
1383PUBLIC Bool
1384glXQueryVersion( Display *dpy, int *maj, int *min )
1385{
1386   (void) dpy;
1387   /* Return GLX version, not Mesa version */
1388   assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1389   *maj = CLIENT_MAJOR_VERSION;
1390   *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1391   return True;
1392}
1393
1394
1395/*
1396 * Query the GLX attributes of the given XVisualInfo.
1397 */
1398static int
1399get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1400{
1401   ASSERT(xmvis);
1402   switch(attrib) {
1403      case GLX_USE_GL:
1404         if (fbconfig)
1405            return GLX_BAD_ATTRIBUTE;
1406         *value = (int) True;
1407	 return 0;
1408      case GLX_BUFFER_SIZE:
1409	 *value = xmvis->visinfo->depth;
1410	 return 0;
1411      case GLX_LEVEL:
1412	 *value = xmvis->mesa_visual.level;
1413	 return 0;
1414      case GLX_RGBA:
1415         if (fbconfig)
1416            return GLX_BAD_ATTRIBUTE;
1417	 if (xmvis->mesa_visual.rgbMode) {
1418	    *value = True;
1419	 }
1420	 else {
1421	    *value = False;
1422	 }
1423	 return 0;
1424      case GLX_DOUBLEBUFFER:
1425	 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1426	 return 0;
1427      case GLX_STEREO:
1428	 *value = (int) xmvis->mesa_visual.stereoMode;
1429	 return 0;
1430      case GLX_AUX_BUFFERS:
1431	 *value = xmvis->mesa_visual.numAuxBuffers;
1432	 return 0;
1433      case GLX_RED_SIZE:
1434         *value = xmvis->mesa_visual.redBits;
1435	 return 0;
1436      case GLX_GREEN_SIZE:
1437         *value = xmvis->mesa_visual.greenBits;
1438	 return 0;
1439      case GLX_BLUE_SIZE:
1440         *value = xmvis->mesa_visual.blueBits;
1441	 return 0;
1442      case GLX_ALPHA_SIZE:
1443         *value = xmvis->mesa_visual.alphaBits;
1444	 return 0;
1445      case GLX_DEPTH_SIZE:
1446         *value = xmvis->mesa_visual.depthBits;
1447	 return 0;
1448      case GLX_STENCIL_SIZE:
1449	 *value = xmvis->mesa_visual.stencilBits;
1450	 return 0;
1451      case GLX_ACCUM_RED_SIZE:
1452	 *value = xmvis->mesa_visual.accumRedBits;
1453	 return 0;
1454      case GLX_ACCUM_GREEN_SIZE:
1455	 *value = xmvis->mesa_visual.accumGreenBits;
1456	 return 0;
1457      case GLX_ACCUM_BLUE_SIZE:
1458	 *value = xmvis->mesa_visual.accumBlueBits;
1459	 return 0;
1460      case GLX_ACCUM_ALPHA_SIZE:
1461         *value = xmvis->mesa_visual.accumAlphaBits;
1462	 return 0;
1463
1464      /*
1465       * GLX_EXT_visual_info extension
1466       */
1467      case GLX_X_VISUAL_TYPE_EXT:
1468         switch (xmvis->visinfo->CLASS) {
1469            case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1470            case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1471            case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1472            case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1473            case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1474            case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1475         }
1476         return 0;
1477      case GLX_TRANSPARENT_TYPE_EXT:
1478         /* normal planes */
1479         *value = GLX_NONE_EXT;
1480         return 0;
1481      case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1482         /* undefined */
1483         return 0;
1484      case GLX_TRANSPARENT_RED_VALUE_EXT:
1485         /* undefined */
1486         return 0;
1487      case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1488         /* undefined */
1489         return 0;
1490      case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1491         /* undefined */
1492         return 0;
1493      case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1494         /* undefined */
1495         return 0;
1496
1497      /*
1498       * GLX_EXT_visual_info extension
1499       */
1500      case GLX_VISUAL_CAVEAT_EXT:
1501         /* test for zero, just in case */
1502         if (xmvis->mesa_visual.visualRating > 0)
1503            *value = xmvis->mesa_visual.visualRating;
1504         else
1505            *value = GLX_NONE_EXT;
1506         return 0;
1507
1508      /*
1509       * GLX_ARB_multisample
1510       */
1511      case GLX_SAMPLE_BUFFERS_ARB:
1512         *value = 0;
1513         return 0;
1514      case GLX_SAMPLES_ARB:
1515         *value = 0;
1516         return 0;
1517
1518      /*
1519       * For FBConfigs:
1520       */
1521      case GLX_SCREEN_EXT:
1522         if (!fbconfig)
1523            return GLX_BAD_ATTRIBUTE;
1524         *value = xmvis->visinfo->screen;
1525         break;
1526      case GLX_DRAWABLE_TYPE: /*SGIX too */
1527         if (!fbconfig)
1528            return GLX_BAD_ATTRIBUTE;
1529         *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1530         break;
1531      case GLX_RENDER_TYPE_SGIX:
1532         if (!fbconfig)
1533            return GLX_BAD_ATTRIBUTE;
1534         if (xmvis->mesa_visual.rgbMode)
1535            *value = GLX_RGBA_BIT;
1536         else
1537            *value = GLX_COLOR_INDEX_BIT;
1538         break;
1539      case GLX_X_RENDERABLE_SGIX:
1540         if (!fbconfig)
1541            return GLX_BAD_ATTRIBUTE;
1542         *value = True; /* XXX really? */
1543         break;
1544      case GLX_FBCONFIG_ID_SGIX:
1545         if (!fbconfig)
1546            return GLX_BAD_ATTRIBUTE;
1547         *value = xmvis->visinfo->visualid;
1548         break;
1549      case GLX_MAX_PBUFFER_WIDTH:
1550         if (!fbconfig)
1551            return GLX_BAD_ATTRIBUTE;
1552         /* XXX or MAX_WIDTH? */
1553         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1554         break;
1555      case GLX_MAX_PBUFFER_HEIGHT:
1556         if (!fbconfig)
1557            return GLX_BAD_ATTRIBUTE;
1558         *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1559         break;
1560      case GLX_MAX_PBUFFER_PIXELS:
1561         if (!fbconfig)
1562            return GLX_BAD_ATTRIBUTE;
1563         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1564                  DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1565         break;
1566      case GLX_VISUAL_ID:
1567         if (!fbconfig)
1568            return GLX_BAD_ATTRIBUTE;
1569         *value = xmvis->visinfo->visualid;
1570         break;
1571
1572#ifdef GLX_EXT_texture_from_pixmap
1573      case GLX_BIND_TO_TEXTURE_RGB_EXT:
1574         *value = True; /*XXX*/
1575         break;
1576      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1577         /* XXX review */
1578         *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1579         break;
1580      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1581         *value = True; /*XXX*/
1582         break;
1583      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1584         *value = (GLX_TEXTURE_1D_BIT_EXT |
1585                   GLX_TEXTURE_2D_BIT_EXT |
1586                   GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1587         break;
1588      case GLX_Y_INVERTED_EXT:
1589         *value = True; /*XXX*/
1590         break;
1591#endif
1592
1593      default:
1594	 return GLX_BAD_ATTRIBUTE;
1595   }
1596   return Success;
1597}
1598
1599
1600PUBLIC int
1601glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1602                   int attrib, int *value )
1603{
1604   XMesaVisual xmvis;
1605   int k;
1606   if (!dpy || !visinfo)
1607      return GLX_BAD_ATTRIBUTE;
1608
1609   xmvis = find_glx_visual( dpy, visinfo );
1610   if (!xmvis) {
1611      /* this visual wasn't obtained with glXChooseVisual */
1612      xmvis = create_glx_visual( dpy, visinfo );
1613      if (!xmvis) {
1614	 /* this visual can't be used for GL rendering */
1615	 if (attrib==GLX_USE_GL) {
1616	    *value = (int) False;
1617	    return 0;
1618	 }
1619	 else {
1620	    return GLX_BAD_VISUAL;
1621	 }
1622      }
1623   }
1624
1625   k = get_config(xmvis, attrib, value, GL_FALSE);
1626   return k;
1627}
1628
1629
1630PUBLIC void
1631glXWaitGL( void )
1632{
1633   XMesaContext xmesa = XMesaGetCurrentContext();
1634   XMesaFlush( xmesa );
1635}
1636
1637
1638
1639PUBLIC void
1640glXWaitX( void )
1641{
1642   XMesaContext xmesa = XMesaGetCurrentContext();
1643   XMesaFlush( xmesa );
1644}
1645
1646
1647static const char *
1648get_extensions( void )
1649{
1650   return EXTENSIONS;
1651}
1652
1653
1654
1655/* GLX 1.1 and later */
1656PUBLIC const char *
1657glXQueryExtensionsString( Display *dpy, int screen )
1658{
1659   (void) dpy;
1660   (void) screen;
1661   return get_extensions();
1662}
1663
1664
1665
1666/* GLX 1.1 and later */
1667PUBLIC const char *
1668glXQueryServerString( Display *dpy, int screen, int name )
1669{
1670   static char version[1000];
1671   sprintf(version, "%d.%d %s",
1672	   SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
1673
1674   (void) dpy;
1675   (void) screen;
1676
1677   switch (name) {
1678      case GLX_EXTENSIONS:
1679         return get_extensions();
1680      case GLX_VENDOR:
1681	 return VENDOR;
1682      case GLX_VERSION:
1683	 return version;
1684      default:
1685         return NULL;
1686   }
1687}
1688
1689
1690
1691/* GLX 1.1 and later */
1692PUBLIC const char *
1693glXGetClientString( Display *dpy, int name )
1694{
1695   static char version[1000];
1696   sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1697	   CLIENT_MINOR_VERSION, xmesa_get_name());
1698
1699   (void) dpy;
1700
1701   switch (name) {
1702      case GLX_EXTENSIONS:
1703         return get_extensions();
1704      case GLX_VENDOR:
1705	 return VENDOR;
1706      case GLX_VERSION:
1707	 return version;
1708      default:
1709         return NULL;
1710   }
1711}
1712
1713
1714
1715/*
1716 * GLX 1.3 and later
1717 */
1718
1719
1720PUBLIC int
1721glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
1722                     int attribute, int *value)
1723{
1724   XMesaVisual v = (XMesaVisual) config;
1725   (void) dpy;
1726   (void) config;
1727
1728   if (!dpy || !config || !value)
1729      return -1;
1730
1731   return get_config(v, attribute, value, GL_TRUE);
1732}
1733
1734
1735PUBLIC GLXFBConfig *
1736glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1737{
1738   XVisualInfo *visuals, visTemplate;
1739   const long visMask = VisualScreenMask;
1740   int i;
1741
1742   /* Get list of all X visuals */
1743   visTemplate.screen = screen;
1744   visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1745   if (*nelements > 0) {
1746      XMesaVisual *results;
1747      results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1748      if (!results) {
1749         *nelements = 0;
1750         return NULL;
1751      }
1752      for (i = 0; i < *nelements; i++) {
1753         results[i] = create_glx_visual(dpy, visuals + i);
1754         if (!results[i]) {
1755            *nelements = i;
1756            break;
1757         }
1758      }
1759      return (GLXFBConfig *) results;
1760   }
1761   return NULL;
1762}
1763
1764
1765PUBLIC GLXFBConfig *
1766glXChooseFBConfig(Display *dpy, int screen,
1767                  const int *attribList, int *nitems)
1768{
1769   XMesaVisual xmvis;
1770
1771   if (!attribList || !attribList[0]) {
1772      /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1773      return glXGetFBConfigs(dpy, screen, nitems);
1774   }
1775
1776   xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1777   if (xmvis) {
1778      GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1779      if (!config) {
1780         *nitems = 0;
1781         return NULL;
1782      }
1783      *nitems = 1;
1784      config[0] = (GLXFBConfig) xmvis;
1785      return (GLXFBConfig *) config;
1786   }
1787   else {
1788      *nitems = 0;
1789      return NULL;
1790   }
1791}
1792
1793
1794PUBLIC XVisualInfo *
1795glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1796{
1797   if (dpy && config) {
1798      XMesaVisual xmvis = (XMesaVisual) config;
1799#if 0
1800      return xmvis->vishandle;
1801#else
1802      /* create a new vishandle - the cached one may be stale */
1803      xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1804      if (xmvis->vishandle) {
1805         memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1806      }
1807      return xmvis->vishandle;
1808#endif
1809   }
1810   else {
1811      return NULL;
1812   }
1813}
1814
1815
1816PUBLIC GLXWindow
1817glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
1818                const int *attribList)
1819{
1820   XMesaVisual xmvis = (XMesaVisual) config;
1821   XMesaBuffer xmbuf;
1822   if (!xmvis)
1823      return 0;
1824
1825   xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1826   if (!xmbuf)
1827      return 0;
1828
1829   (void) dpy;
1830   (void) attribList;  /* Ignored in GLX 1.3 */
1831
1832   return win;  /* A hack for now */
1833}
1834
1835
1836PUBLIC void
1837glXDestroyWindow( Display *dpy, GLXWindow window )
1838{
1839   XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1840   if (b)
1841      XMesaDestroyBuffer(b);
1842   /* don't destroy X window */
1843}
1844
1845
1846/* XXX untested */
1847PUBLIC GLXPixmap
1848glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
1849                const int *attribList)
1850{
1851   XMesaVisual v = (XMesaVisual) config;
1852   XMesaBuffer b;
1853   const int *attr;
1854   int target = 0, format = 0, mipmap = 0;
1855   int value;
1856
1857   if (!dpy || !config || !pixmap)
1858      return 0;
1859
1860   for (attr = attribList; attr && *attr; attr++) {
1861      switch (*attr) {
1862      case GLX_TEXTURE_FORMAT_EXT:
1863         attr++;
1864         switch (*attr) {
1865         case GLX_TEXTURE_FORMAT_NONE_EXT:
1866         case GLX_TEXTURE_FORMAT_RGB_EXT:
1867         case GLX_TEXTURE_FORMAT_RGBA_EXT:
1868            format = *attr;
1869            break;
1870         default:
1871            /* error */
1872            return 0;
1873         }
1874         break;
1875      case GLX_TEXTURE_TARGET_EXT:
1876         attr++;
1877         switch (*attr) {
1878         case GLX_TEXTURE_1D_EXT:
1879         case GLX_TEXTURE_2D_EXT:
1880         case GLX_TEXTURE_RECTANGLE_EXT:
1881            target = *attr;
1882            break;
1883         default:
1884            /* error */
1885            return 0;
1886         }
1887         break;
1888      case GLX_MIPMAP_TEXTURE_EXT:
1889         attr++;
1890         if (*attr)
1891            mipmap = 1;
1892         break;
1893      default:
1894         /* error */
1895         return 0;
1896      }
1897   }
1898
1899   if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1900      if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1901                     &value, GL_TRUE) != Success
1902          || !value) {
1903         return 0; /* error! */
1904      }
1905   }
1906   else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1907      if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1908                     &value, GL_TRUE) != Success
1909          || !value) {
1910         return 0; /* error! */
1911      }
1912   }
1913   if (mipmap) {
1914      if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1915                     &value, GL_TRUE) != Success
1916          || !value) {
1917         return 0; /* error! */
1918      }
1919   }
1920   if (target == GLX_TEXTURE_1D_EXT) {
1921      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1922                     &value, GL_TRUE) != Success
1923          || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1924         return 0; /* error! */
1925      }
1926   }
1927   else if (target == GLX_TEXTURE_2D_EXT) {
1928      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1929                     &value, GL_TRUE) != Success
1930          || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1931         return 0; /* error! */
1932      }
1933   }
1934   if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1935      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1936                     &value, GL_TRUE) != Success
1937          || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1938         return 0; /* error! */
1939      }
1940   }
1941
1942   if (format || target || mipmap) {
1943      /* texture from pixmap */
1944      b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1945   }
1946   else {
1947      b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1948   }
1949   if (!b) {
1950      return 0;
1951   }
1952
1953   return pixmap;
1954}
1955
1956
1957PUBLIC void
1958glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1959{
1960   XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1961   if (b)
1962      XMesaDestroyBuffer(b);
1963   /* don't destroy X pixmap */
1964}
1965
1966
1967PUBLIC GLXPbuffer
1968glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
1969{
1970   XMesaVisual xmvis = (XMesaVisual) config;
1971   XMesaBuffer xmbuf;
1972   const int *attrib;
1973   int width = 0, height = 0;
1974   GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1975
1976   (void) dpy;
1977
1978   for (attrib = attribList; *attrib; attrib++) {
1979      switch (*attrib) {
1980         case GLX_PBUFFER_WIDTH:
1981            attrib++;
1982            width = *attrib;
1983            break;
1984         case GLX_PBUFFER_HEIGHT:
1985            attrib++;
1986            height = *attrib;
1987            break;
1988         case GLX_PRESERVED_CONTENTS:
1989            attrib++;
1990            preserveContents = *attrib;
1991            break;
1992         case GLX_LARGEST_PBUFFER:
1993            attrib++;
1994            useLargest = *attrib;
1995            break;
1996         default:
1997            return 0;
1998      }
1999   }
2000
2001   if (width == 0 || height == 0)
2002      return 0;
2003
2004   if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2005      /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2006       * allocate the largest possible buffer.
2007       */
2008      if (useLargest) {
2009         width = MAX_WIDTH;
2010         height = MAX_HEIGHT;
2011      }
2012   }
2013
2014   xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2015   /* A GLXPbuffer handle must be an X Drawable because that's what
2016    * glXMakeCurrent takes.
2017    */
2018   if (xmbuf) {
2019      xmbuf->largestPbuffer = useLargest;
2020      xmbuf->preservedContents = preserveContents;
2021      return (GLXPbuffer) xmbuf->drawable;
2022   }
2023   else {
2024      return 0;
2025   }
2026}
2027
2028
2029PUBLIC void
2030glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2031{
2032   XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2033   if (b) {
2034      XMesaDestroyBuffer(b);
2035   }
2036}
2037
2038
2039PUBLIC void
2040glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
2041                 unsigned int *value)
2042{
2043   GLuint width, height;
2044   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2045   if (!xmbuf)
2046      return;
2047
2048   /* make sure buffer's dimensions are up to date */
2049   xmesa_get_window_size(dpy, xmbuf, &width, &height);
2050
2051   switch (attribute) {
2052      case GLX_WIDTH:
2053         *value = width;
2054         break;
2055      case GLX_HEIGHT:
2056         *value = height;
2057         break;
2058      case GLX_PRESERVED_CONTENTS:
2059         *value = xmbuf->preservedContents;
2060         break;
2061      case GLX_LARGEST_PBUFFER:
2062         *value = xmbuf->largestPbuffer;
2063         break;
2064      case GLX_FBCONFIG_ID:
2065         *value = xmbuf->xm_visual->visinfo->visualid;
2066         return;
2067#ifdef GLX_EXT_texture_from_pixmap
2068      case GLX_TEXTURE_FORMAT_EXT:
2069         *value = xmbuf->TextureFormat;
2070         break;
2071      case GLX_TEXTURE_TARGET_EXT:
2072         *value = xmbuf->TextureTarget;
2073         break;
2074      case GLX_MIPMAP_TEXTURE_EXT:
2075         *value = xmbuf->TextureMipmap;
2076         break;
2077#endif
2078
2079      default:
2080         return; /* raise BadValue error */
2081   }
2082}
2083
2084
2085PUBLIC GLXContext
2086glXCreateNewContext( Display *dpy, GLXFBConfig config,
2087                     int renderType, GLXContext shareList, Bool direct )
2088{
2089   GLXContext glxCtx;
2090   GLXContext shareCtx = shareList;
2091   XMesaVisual xmvis = (XMesaVisual) config;
2092
2093   if (!dpy || !config ||
2094       (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2095      return 0;
2096
2097   glxCtx = CALLOC_STRUCT(__GLXcontextRec);
2098   if (!glxCtx)
2099      return 0;
2100
2101   /* deallocate unused windows/buffers */
2102   XMesaGarbageCollect();
2103
2104   glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2105                                   shareCtx ? shareCtx->xmesaContext : NULL);
2106   if (!glxCtx->xmesaContext) {
2107      free(glxCtx);
2108      return NULL;
2109   }
2110
2111   glxCtx->isDirect = DEFAULT_DIRECT;
2112   glxCtx->currentDpy = dpy;
2113   glxCtx->xid = (XID) glxCtx;  /* self pointer */
2114
2115   return glxCtx;
2116}
2117
2118
2119PUBLIC int
2120glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2121{
2122   GLXContext glxCtx = ctx;
2123   XMesaContext xmctx = glxCtx->xmesaContext;
2124
2125   (void) dpy;
2126   (void) ctx;
2127
2128   switch (attribute) {
2129   case GLX_FBCONFIG_ID:
2130      *value = xmctx->xm_visual->visinfo->visualid;
2131      break;
2132   case GLX_RENDER_TYPE:
2133      if (xmctx->xm_visual->mesa_visual.rgbMode)
2134         *value = GLX_RGBA_TYPE;
2135      else
2136         *value = GLX_COLOR_INDEX_TYPE;
2137      break;
2138   case GLX_SCREEN:
2139      *value = 0;
2140      return Success;
2141   default:
2142      return GLX_BAD_ATTRIBUTE;
2143   }
2144   return 0;
2145}
2146
2147
2148PUBLIC void
2149glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2150{
2151   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2152   if (xmbuf)
2153      xmbuf->selectedEvents = mask;
2154}
2155
2156
2157PUBLIC void
2158glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2159{
2160   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2161   if (xmbuf)
2162      *mask = xmbuf->selectedEvents;
2163   else
2164      *mask = 0;
2165}
2166
2167
2168
2169/*** GLX_SGI_swap_control ***/
2170
2171PUBLIC int
2172glXSwapIntervalSGI(int interval)
2173{
2174   (void) interval;
2175   return 0;
2176}
2177
2178
2179
2180/*** GLX_SGI_video_sync ***/
2181
2182static unsigned int FrameCounter = 0;
2183
2184PUBLIC int
2185glXGetVideoSyncSGI(unsigned int *count)
2186{
2187   /* this is a bogus implementation */
2188   *count = FrameCounter++;
2189   return 0;
2190}
2191
2192PUBLIC int
2193glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2194{
2195   if (divisor <= 0 || remainder < 0)
2196      return GLX_BAD_VALUE;
2197   /* this is a bogus implementation */
2198   FrameCounter++;
2199   while (FrameCounter % divisor != remainder)
2200      FrameCounter++;
2201   *count = FrameCounter;
2202   return 0;
2203}
2204
2205
2206
2207/*** GLX_SGI_make_current_read ***/
2208
2209PUBLIC Bool
2210glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
2211                      GLXContext ctx)
2212{
2213   return glXMakeContextCurrent( dpy, draw, read, ctx );
2214}
2215
2216/* not used
2217static GLXDrawable
2218glXGetCurrentReadDrawableSGI(void)
2219{
2220   return 0;
2221}
2222*/
2223
2224
2225/*** GLX_SGIX_video_source ***/
2226#if defined(_VL_H)
2227
2228PUBLIC GLXVideoSourceSGIX
2229glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
2230                            VLPath path, int nodeClass, VLNode drainNode)
2231{
2232   (void) dpy;
2233   (void) screen;
2234   (void) server;
2235   (void) path;
2236   (void) nodeClass;
2237   (void) drainNode;
2238   return 0;
2239}
2240
2241PUBLIC void
2242glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2243{
2244   (void) dpy;
2245   (void) src;
2246}
2247
2248#endif
2249
2250
2251/*** GLX_EXT_import_context ***/
2252
2253PUBLIC void
2254glXFreeContextEXT(Display *dpy, GLXContext context)
2255{
2256   (void) dpy;
2257   (void) context;
2258}
2259
2260PUBLIC GLXContextID
2261glXGetContextIDEXT(const GLXContext context)
2262{
2263   (void) context;
2264   return 0;
2265}
2266
2267PUBLIC GLXContext
2268glXImportContextEXT(Display *dpy, GLXContextID contextID)
2269{
2270   (void) dpy;
2271   (void) contextID;
2272   return 0;
2273}
2274
2275PUBLIC int
2276glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
2277                       int *value)
2278{
2279   (void) dpy;
2280   (void) context;
2281   (void) attribute;
2282   (void) value;
2283   return 0;
2284}
2285
2286
2287
2288/*** GLX_SGIX_fbconfig ***/
2289
2290PUBLIC int
2291glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
2292                         int attribute, int *value)
2293{
2294   return glXGetFBConfigAttrib(dpy, config, attribute, value);
2295}
2296
2297PUBLIC GLXFBConfigSGIX *
2298glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list,
2299                      int *nelements)
2300{
2301   return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
2302                                            attrib_list, nelements);
2303}
2304
2305
2306PUBLIC GLXPixmap
2307glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2308                                 Pixmap pixmap)
2309{
2310   XMesaVisual xmvis = (XMesaVisual) config;
2311   XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2312   return xmbuf->drawable; /* need to return an X ID */
2313}
2314
2315
2316PUBLIC GLXContext
2317glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2318                               int render_type, GLXContext share_list,
2319                               Bool direct)
2320{
2321   XMesaVisual xmvis = (XMesaVisual) config;
2322   GLXContext glxCtx;
2323   GLXContext shareCtx = share_list;
2324
2325   glxCtx = CALLOC_STRUCT(__GLXcontextRec);
2326   if (!glxCtx)
2327      return 0;
2328
2329   /* deallocate unused windows/buffers */
2330   XMesaGarbageCollect();
2331
2332   glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2333                                   shareCtx ? shareCtx->xmesaContext : NULL);
2334   if (!glxCtx->xmesaContext) {
2335      free(glxCtx);
2336      return NULL;
2337   }
2338
2339   glxCtx->isDirect = DEFAULT_DIRECT;
2340   glxCtx->currentDpy = dpy;
2341   glxCtx->xid = (XID) glxCtx;  /* self pointer */
2342
2343   return glxCtx;
2344}
2345
2346
2347PUBLIC XVisualInfo *
2348glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2349{
2350   return glXGetVisualFromFBConfig(dpy, config);
2351}
2352
2353
2354PUBLIC GLXFBConfigSGIX
2355glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2356{
2357   XMesaVisual xmvis = find_glx_visual(dpy, vis);
2358   if (!xmvis) {
2359      /* This visual wasn't found with glXChooseVisual() */
2360      xmvis = create_glx_visual(dpy, vis);
2361   }
2362
2363   return (GLXFBConfigSGIX) xmvis;
2364}
2365
2366
2367
2368/*** GLX_SGIX_pbuffer ***/
2369
2370PUBLIC GLXPbufferSGIX
2371glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2372                        unsigned int width, unsigned int height,
2373                        int *attribList)
2374{
2375   XMesaVisual xmvis = (XMesaVisual) config;
2376   XMesaBuffer xmbuf;
2377   const int *attrib;
2378   GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2379
2380   (void) dpy;
2381
2382   for (attrib = attribList; attrib && *attrib; attrib++) {
2383      switch (*attrib) {
2384         case GLX_PRESERVED_CONTENTS_SGIX:
2385            attrib++;
2386            preserveContents = *attrib; /* ignored */
2387            break;
2388         case GLX_LARGEST_PBUFFER_SGIX:
2389            attrib++;
2390            useLargest = *attrib; /* ignored */
2391            break;
2392         default:
2393            return 0;
2394      }
2395   }
2396
2397   /* not used at this time */
2398   (void) useLargest;
2399   (void) preserveContents;
2400
2401   xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2402   /* A GLXPbuffer handle must be an X Drawable because that's what
2403    * glXMakeCurrent takes.
2404    */
2405   return (GLXPbuffer) xmbuf->drawable;
2406}
2407
2408
2409PUBLIC void
2410glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2411{
2412   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2413   if (xmbuf) {
2414      XMesaDestroyBuffer(xmbuf);
2415   }
2416}
2417
2418
2419PUBLIC int
2420glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
2421                       unsigned int *value)
2422{
2423   const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2424
2425   if (!xmbuf) {
2426      /* Generate GLXBadPbufferSGIX for bad pbuffer */
2427      return 0;
2428   }
2429
2430   switch (attribute) {
2431      case GLX_PRESERVED_CONTENTS_SGIX:
2432         *value = True;
2433         break;
2434      case GLX_LARGEST_PBUFFER_SGIX:
2435         *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2436         break;
2437      case GLX_WIDTH_SGIX:
2438         *value = xmesa_buffer_width(xmbuf);
2439         break;
2440      case GLX_HEIGHT_SGIX:
2441         *value = xmesa_buffer_height(xmbuf);
2442         break;
2443      case GLX_EVENT_MASK_SGIX:
2444         *value = 0;  /* XXX might be wrong */
2445         break;
2446      default:
2447         *value = 0;
2448   }
2449   return 0;
2450}
2451
2452
2453PUBLIC void
2454glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2455{
2456   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2457   if (xmbuf) {
2458      /* Note: we'll never generate clobber events */
2459      xmbuf->selectedEvents = mask;
2460   }
2461}
2462
2463
2464PUBLIC void
2465glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
2466                        unsigned long *mask)
2467{
2468   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2469   if (xmbuf) {
2470      *mask = xmbuf->selectedEvents;
2471   }
2472   else {
2473      *mask = 0;
2474   }
2475}
2476
2477
2478
2479/*** GLX_SGI_cushion ***/
2480
2481PUBLIC void
2482glXCushionSGI(Display *dpy, Window win, float cushion)
2483{
2484   (void) dpy;
2485   (void) win;
2486   (void) cushion;
2487}
2488
2489
2490
2491/*** GLX_SGIX_video_resize ***/
2492
2493PUBLIC int
2494glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
2495                           Window window)
2496{
2497   (void) dpy;
2498   (void) screen;
2499   (void) channel;
2500   (void) window;
2501   return 0;
2502}
2503
2504PUBLIC int
2505glXChannelRectSGIX(Display *dpy, int screen, int channel,
2506                   int x, int y, int w, int h)
2507{
2508   (void) dpy;
2509   (void) screen;
2510   (void) channel;
2511   (void) x;
2512   (void) y;
2513   (void) w;
2514   (void) h;
2515   return 0;
2516}
2517
2518PUBLIC int
2519glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
2520                        int *x, int *y, int *w, int *h)
2521{
2522   (void) dpy;
2523   (void) screen;
2524   (void) channel;
2525   (void) x;
2526   (void) y;
2527   (void) w;
2528   (void) h;
2529   return 0;
2530}
2531
2532PUBLIC int
2533glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
2534                          int *dx, int *dy, int *dw, int *dh)
2535{
2536   (void) dpy;
2537   (void) screen;
2538   (void) channel;
2539   (void) dx;
2540   (void) dy;
2541   (void) dw;
2542   (void) dh;
2543   return 0;
2544}
2545
2546PUBLIC int
2547glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2548{
2549   (void) dpy;
2550   (void) screen;
2551   (void) channel;
2552   (void) synctype;
2553   return 0;
2554}
2555
2556
2557
2558/*** GLX_SGIX_dmbuffer **/
2559
2560#if defined(_DM_BUFFER_H_)
2561PUBLIC Bool
2562glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
2563                          DMparams *params, DMbuffer dmbuffer)
2564{
2565   (void) dpy;
2566   (void) pbuffer;
2567   (void) params;
2568   (void) dmbuffer;
2569   return False;
2570}
2571#endif
2572
2573
2574/*** GLX_SGIX_swap_group ***/
2575
2576PUBLIC void
2577glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2578{
2579   (void) dpy;
2580   (void) drawable;
2581   (void) member;
2582}
2583
2584
2585
2586/*** GLX_SGIX_swap_barrier ***/
2587
2588PUBLIC void
2589glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2590{
2591   (void) dpy;
2592   (void) drawable;
2593   (void) barrier;
2594}
2595
2596PUBLIC Bool
2597glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2598{
2599   (void) dpy;
2600   (void) screen;
2601   (void) max;
2602   return False;
2603}
2604
2605
2606
2607/*** GLX_SUN_get_transparent_index ***/
2608
2609PUBLIC Status
2610glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
2611                          long *pTransparent)
2612{
2613   (void) dpy;
2614   (void) overlay;
2615   (void) underlay;
2616   (void) pTransparent;
2617   return 0;
2618}
2619
2620
2621
2622/*** GLX_MESA_release_buffers ***/
2623
2624/*
2625 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2626 * (a window or pixmap) prior to destroying the GLXDrawable.
2627 */
2628PUBLIC Bool
2629glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2630{
2631   XMesaBuffer b = XMesaFindBuffer(dpy, d);
2632   if (b) {
2633      XMesaDestroyBuffer(b);
2634      return True;
2635   }
2636   return False;
2637}
2638
2639/*** GLX_EXT_texture_from_pixmap ***/
2640
2641PUBLIC void
2642glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2643                        const int *attrib_list)
2644{
2645   XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2646   if (b)
2647      XMesaBindTexImage(dpy, b, buffer, attrib_list);
2648}
2649
2650PUBLIC void
2651glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2652{
2653   XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2654   if (b)
2655      XMesaReleaseTexImage(dpy, b, buffer);
2656}
2657