glx_api.c revision 81183b1e3e6a23987817c4b29ab15bc37eae9711 
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.6
4 *
5 * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
6 * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * 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
1021/**
1022 * Helper function used by other glXCreateContext functions.
1023 */
1024static GLXContext
1025create_context(Display *dpy, XMesaVisual xmvis,
1026               XMesaContext shareCtx, Bool direct,
1027               unsigned major, unsigned minor,
1028               unsigned profileMask, unsigned contextFlags)
1029{
1030   GLXContext glxCtx;
1031
1032   if (!dpy || !xmvis)
1033      return 0;
1034
1035   glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1036   if (!glxCtx)
1037      return 0;
1038
1039   /* deallocate unused windows/buffers */
1040#if 0
1041   XMesaGarbageCollect();
1042#endif
1043
1044   glxCtx->xmesaContext = XMesaCreateContext(xmvis, shareCtx);
1045   if (!glxCtx->xmesaContext) {
1046      free(glxCtx);
1047      return NULL;
1048   }
1049
1050   glxCtx->isDirect = DEFAULT_DIRECT;
1051   glxCtx->currentDpy = dpy;
1052   glxCtx->xid = (XID) glxCtx;  /* self pointer */
1053
1054   return glxCtx;
1055}
1056
1057
1058PUBLIC GLXContext
1059glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1060                  GLXContext shareCtx, Bool direct )
1061{
1062   XMesaVisual xmvis;
1063
1064   xmvis = find_glx_visual( dpy, visinfo );
1065   if (!xmvis) {
1066      /* This visual wasn't found with glXChooseVisual() */
1067      xmvis = create_glx_visual( dpy, visinfo );
1068      if (!xmvis) {
1069         /* unusable visual */
1070         return NULL;
1071      }
1072   }
1073
1074   return create_context(dpy, xmvis,
1075                         shareCtx ? shareCtx->xmesaContext : NULL,
1076                         direct,
1077                         1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
1078}
1079
1080
1081/* XXX these may have to be removed due to thread-safety issues. */
1082static GLXContext MakeCurrent_PrevContext = 0;
1083static GLXDrawable MakeCurrent_PrevDrawable = 0;
1084static GLXDrawable MakeCurrent_PrevReadable = 0;
1085static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1086static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1087
1088
1089/* GLX 1.3 and later */
1090PUBLIC Bool
1091glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1092                       GLXDrawable read, GLXContext ctx )
1093{
1094   GLXContext glxCtx = ctx;
1095   static boolean firsttime = 1, no_rast = 0;
1096
1097   if (firsttime) {
1098      no_rast = getenv("SP_NO_RAST") != NULL;
1099      firsttime = 0;
1100   }
1101
1102   if (ctx && draw && read) {
1103      XMesaBuffer drawBuffer, readBuffer;
1104      XMesaContext xmctx = glxCtx->xmesaContext;
1105
1106      /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1107      if (ctx == MakeCurrent_PrevContext
1108          && draw == MakeCurrent_PrevDrawable) {
1109         drawBuffer = MakeCurrent_PrevDrawBuffer;
1110      }
1111      else {
1112         drawBuffer = XMesaFindBuffer( dpy, draw );
1113      }
1114      if (!drawBuffer) {
1115         /* drawable must be a new window! */
1116         drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1117         if (!drawBuffer) {
1118            /* Out of memory, or context/drawable depth mismatch */
1119            return False;
1120         }
1121      }
1122
1123      /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1124      if (ctx == MakeCurrent_PrevContext
1125          && read == MakeCurrent_PrevReadable) {
1126         readBuffer = MakeCurrent_PrevReadBuffer;
1127      }
1128      else {
1129         readBuffer = XMesaFindBuffer( dpy, read );
1130      }
1131      if (!readBuffer) {
1132         /* drawable must be a new window! */
1133         readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1134         if (!readBuffer) {
1135            /* Out of memory, or context/drawable depth mismatch */
1136            return False;
1137         }
1138      }
1139
1140      if (no_rast &&
1141          MakeCurrent_PrevContext == ctx &&
1142          MakeCurrent_PrevDrawable == draw &&
1143          MakeCurrent_PrevReadable == read &&
1144          MakeCurrent_PrevDrawBuffer == drawBuffer &&
1145          MakeCurrent_PrevReadBuffer == readBuffer)
1146         return True;
1147
1148      MakeCurrent_PrevContext = ctx;
1149      MakeCurrent_PrevDrawable = draw;
1150      MakeCurrent_PrevReadable = read;
1151      MakeCurrent_PrevDrawBuffer = drawBuffer;
1152      MakeCurrent_PrevReadBuffer = readBuffer;
1153
1154      /* Now make current! */
1155      if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1156         ctx->currentDpy = dpy;
1157         ctx->currentDrawable = draw;
1158         ctx->currentReadable = read;
1159         SetCurrentContext(ctx);
1160         return True;
1161      }
1162      else {
1163         return False;
1164      }
1165   }
1166   else if (!ctx && !draw && !read) {
1167      /* release current context w/out assigning new one. */
1168      XMesaMakeCurrent2( NULL, NULL, NULL );
1169      MakeCurrent_PrevContext = 0;
1170      MakeCurrent_PrevDrawable = 0;
1171      MakeCurrent_PrevReadable = 0;
1172      MakeCurrent_PrevDrawBuffer = 0;
1173      MakeCurrent_PrevReadBuffer = 0;
1174      SetCurrentContext(NULL);
1175      return True;
1176   }
1177   else {
1178      /* The args must either all be non-zero or all zero.
1179       * This is an error.
1180       */
1181      return False;
1182   }
1183}
1184
1185
1186PUBLIC Bool
1187glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1188{
1189   return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1190}
1191
1192
1193PUBLIC GLXContext
1194glXGetCurrentContext(void)
1195{
1196   return GetCurrentContext();
1197}
1198
1199
1200PUBLIC Display *
1201glXGetCurrentDisplay(void)
1202{
1203   GLXContext glxCtx = glXGetCurrentContext();
1204
1205   return glxCtx ? glxCtx->currentDpy : NULL;
1206}
1207
1208
1209PUBLIC Display *
1210glXGetCurrentDisplayEXT(void)
1211{
1212   return glXGetCurrentDisplay();
1213}
1214
1215
1216PUBLIC GLXDrawable
1217glXGetCurrentDrawable(void)
1218{
1219   GLXContext gc = glXGetCurrentContext();
1220   return gc ? gc->currentDrawable : 0;
1221}
1222
1223
1224PUBLIC GLXDrawable
1225glXGetCurrentReadDrawable(void)
1226{
1227   GLXContext gc = glXGetCurrentContext();
1228   return gc ? gc->currentReadable : 0;
1229}
1230
1231
1232PUBLIC GLXDrawable
1233glXGetCurrentReadDrawableSGI(void)
1234{
1235   return glXGetCurrentReadDrawable();
1236}
1237
1238
1239PUBLIC GLXPixmap
1240glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1241{
1242   XMesaVisual v;
1243   XMesaBuffer b;
1244
1245   v = find_glx_visual( dpy, visinfo );
1246   if (!v) {
1247      v = create_glx_visual( dpy, visinfo );
1248      if (!v) {
1249         /* unusable visual */
1250         return 0;
1251      }
1252   }
1253
1254   b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1255   if (!b) {
1256      return 0;
1257   }
1258   return b->drawable;
1259}
1260
1261
1262/*** GLX_MESA_pixmap_colormap ***/
1263
1264PUBLIC GLXPixmap
1265glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1266                        Pixmap pixmap, Colormap cmap )
1267{
1268   XMesaVisual v;
1269   XMesaBuffer b;
1270
1271   v = find_glx_visual( dpy, visinfo );
1272   if (!v) {
1273      v = create_glx_visual( dpy, visinfo );
1274      if (!v) {
1275         /* unusable visual */
1276         return 0;
1277      }
1278   }
1279
1280   b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1281   if (!b) {
1282      return 0;
1283   }
1284   return b->drawable;
1285}
1286
1287
1288PUBLIC void
1289glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1290{
1291   XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1292   if (b) {
1293      XMesaDestroyBuffer(b);
1294   }
1295   else if (_mesa_getenv("MESA_DEBUG")) {
1296      _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1297   }
1298}
1299
1300
1301PUBLIC void
1302glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1303                unsigned long mask )
1304{
1305   XMesaContext xm_src = src->xmesaContext;
1306   XMesaContext xm_dst = dst->xmesaContext;
1307   (void) dpy;
1308   if (MakeCurrent_PrevContext == src) {
1309      glFlush();
1310   }
1311   XMesaCopyContext(xm_src, xm_dst, mask);
1312}
1313
1314
1315PUBLIC Bool
1316glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1317{
1318   int op, ev, err;
1319   /* Mesa's GLX isn't really an X extension but we try to act like one. */
1320   if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1321      ev = err = 0;
1322   if (errorBase)
1323      *errorBase = err;
1324   if (eventBase)
1325      *eventBase = ev;
1326   return True; /* we're faking GLX so always return success */
1327}
1328
1329
1330PUBLIC void
1331glXDestroyContext( Display *dpy, GLXContext ctx )
1332{
1333   GLXContext glxCtx = ctx;
1334   (void) dpy;
1335   MakeCurrent_PrevContext = 0;
1336   MakeCurrent_PrevDrawable = 0;
1337   MakeCurrent_PrevReadable = 0;
1338   MakeCurrent_PrevDrawBuffer = 0;
1339   MakeCurrent_PrevReadBuffer = 0;
1340   XMesaDestroyContext( glxCtx->xmesaContext );
1341   XMesaGarbageCollect();
1342   free(glxCtx);
1343}
1344
1345
1346PUBLIC Bool
1347glXIsDirect( Display *dpy, GLXContext ctx )
1348{
1349   GLXContext glxCtx = ctx;
1350   (void) ctx;
1351   return glxCtx->isDirect;
1352}
1353
1354
1355
1356PUBLIC void
1357glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1358{
1359   XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1360   static boolean firsttime = 1, no_rast = 0;
1361
1362   if (firsttime) {
1363      no_rast = getenv("SP_NO_RAST") != NULL;
1364      firsttime = 0;
1365   }
1366
1367   if (no_rast)
1368      return;
1369
1370   if (buffer) {
1371      XMesaSwapBuffers(buffer);
1372   }
1373   else if (_mesa_getenv("MESA_DEBUG")) {
1374      _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1375                    (int) drawable);
1376   }
1377}
1378
1379
1380
1381/*** GLX_MESA_copy_sub_buffer ***/
1382
1383PUBLIC void
1384glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
1385                     int x, int y, int width, int height)
1386{
1387   XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1388   if (buffer) {
1389      XMesaCopySubBuffer(buffer, x, y, width, height);
1390   }
1391   else if (_mesa_getenv("MESA_DEBUG")) {
1392      _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1393   }
1394}
1395
1396
1397PUBLIC Bool
1398glXQueryVersion( Display *dpy, int *maj, int *min )
1399{
1400   (void) dpy;
1401   /* Return GLX version, not Mesa version */
1402   assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1403   *maj = CLIENT_MAJOR_VERSION;
1404   *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1405   return True;
1406}
1407
1408
1409/*
1410 * Query the GLX attributes of the given XVisualInfo.
1411 */
1412static int
1413get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1414{
1415   ASSERT(xmvis);
1416   switch(attrib) {
1417      case GLX_USE_GL:
1418         if (fbconfig)
1419            return GLX_BAD_ATTRIBUTE;
1420         *value = (int) True;
1421	 return 0;
1422      case GLX_BUFFER_SIZE:
1423	 *value = xmvis->visinfo->depth;
1424	 return 0;
1425      case GLX_LEVEL:
1426	 *value = xmvis->mesa_visual.level;
1427	 return 0;
1428      case GLX_RGBA:
1429         if (fbconfig)
1430            return GLX_BAD_ATTRIBUTE;
1431	 if (xmvis->mesa_visual.rgbMode) {
1432	    *value = True;
1433	 }
1434	 else {
1435	    *value = False;
1436	 }
1437	 return 0;
1438      case GLX_DOUBLEBUFFER:
1439	 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1440	 return 0;
1441      case GLX_STEREO:
1442	 *value = (int) xmvis->mesa_visual.stereoMode;
1443	 return 0;
1444      case GLX_AUX_BUFFERS:
1445	 *value = xmvis->mesa_visual.numAuxBuffers;
1446	 return 0;
1447      case GLX_RED_SIZE:
1448         *value = xmvis->mesa_visual.redBits;
1449	 return 0;
1450      case GLX_GREEN_SIZE:
1451         *value = xmvis->mesa_visual.greenBits;
1452	 return 0;
1453      case GLX_BLUE_SIZE:
1454         *value = xmvis->mesa_visual.blueBits;
1455	 return 0;
1456      case GLX_ALPHA_SIZE:
1457         *value = xmvis->mesa_visual.alphaBits;
1458	 return 0;
1459      case GLX_DEPTH_SIZE:
1460         *value = xmvis->mesa_visual.depthBits;
1461	 return 0;
1462      case GLX_STENCIL_SIZE:
1463	 *value = xmvis->mesa_visual.stencilBits;
1464	 return 0;
1465      case GLX_ACCUM_RED_SIZE:
1466	 *value = xmvis->mesa_visual.accumRedBits;
1467	 return 0;
1468      case GLX_ACCUM_GREEN_SIZE:
1469	 *value = xmvis->mesa_visual.accumGreenBits;
1470	 return 0;
1471      case GLX_ACCUM_BLUE_SIZE:
1472	 *value = xmvis->mesa_visual.accumBlueBits;
1473	 return 0;
1474      case GLX_ACCUM_ALPHA_SIZE:
1475         *value = xmvis->mesa_visual.accumAlphaBits;
1476	 return 0;
1477
1478      /*
1479       * GLX_EXT_visual_info extension
1480       */
1481      case GLX_X_VISUAL_TYPE_EXT:
1482         switch (xmvis->visinfo->CLASS) {
1483            case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1484            case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1485            case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1486            case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1487            case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1488            case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1489         }
1490         return 0;
1491      case GLX_TRANSPARENT_TYPE_EXT:
1492         /* normal planes */
1493         *value = GLX_NONE_EXT;
1494         return 0;
1495      case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1496         /* undefined */
1497         return 0;
1498      case GLX_TRANSPARENT_RED_VALUE_EXT:
1499         /* undefined */
1500         return 0;
1501      case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1502         /* undefined */
1503         return 0;
1504      case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1505         /* undefined */
1506         return 0;
1507      case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1508         /* undefined */
1509         return 0;
1510
1511      /*
1512       * GLX_EXT_visual_info extension
1513       */
1514      case GLX_VISUAL_CAVEAT_EXT:
1515         /* test for zero, just in case */
1516         if (xmvis->mesa_visual.visualRating > 0)
1517            *value = xmvis->mesa_visual.visualRating;
1518         else
1519            *value = GLX_NONE_EXT;
1520         return 0;
1521
1522      /*
1523       * GLX_ARB_multisample
1524       */
1525      case GLX_SAMPLE_BUFFERS_ARB:
1526         *value = 0;
1527         return 0;
1528      case GLX_SAMPLES_ARB:
1529         *value = 0;
1530         return 0;
1531
1532      /*
1533       * For FBConfigs:
1534       */
1535      case GLX_SCREEN_EXT:
1536         if (!fbconfig)
1537            return GLX_BAD_ATTRIBUTE;
1538         *value = xmvis->visinfo->screen;
1539         break;
1540      case GLX_DRAWABLE_TYPE: /*SGIX too */
1541         if (!fbconfig)
1542            return GLX_BAD_ATTRIBUTE;
1543         *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1544         break;
1545      case GLX_RENDER_TYPE_SGIX:
1546         if (!fbconfig)
1547            return GLX_BAD_ATTRIBUTE;
1548         if (xmvis->mesa_visual.rgbMode)
1549            *value = GLX_RGBA_BIT;
1550         else
1551            *value = GLX_COLOR_INDEX_BIT;
1552         break;
1553      case GLX_X_RENDERABLE_SGIX:
1554         if (!fbconfig)
1555            return GLX_BAD_ATTRIBUTE;
1556         *value = True; /* XXX really? */
1557         break;
1558      case GLX_FBCONFIG_ID_SGIX:
1559         if (!fbconfig)
1560            return GLX_BAD_ATTRIBUTE;
1561         *value = xmvis->visinfo->visualid;
1562         break;
1563      case GLX_MAX_PBUFFER_WIDTH:
1564         if (!fbconfig)
1565            return GLX_BAD_ATTRIBUTE;
1566         /* XXX or MAX_WIDTH? */
1567         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1568         break;
1569      case GLX_MAX_PBUFFER_HEIGHT:
1570         if (!fbconfig)
1571            return GLX_BAD_ATTRIBUTE;
1572         *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1573         break;
1574      case GLX_MAX_PBUFFER_PIXELS:
1575         if (!fbconfig)
1576            return GLX_BAD_ATTRIBUTE;
1577         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1578                  DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1579         break;
1580      case GLX_VISUAL_ID:
1581         if (!fbconfig)
1582            return GLX_BAD_ATTRIBUTE;
1583         *value = xmvis->visinfo->visualid;
1584         break;
1585
1586#ifdef GLX_EXT_texture_from_pixmap
1587      case GLX_BIND_TO_TEXTURE_RGB_EXT:
1588         *value = True; /*XXX*/
1589         break;
1590      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1591         /* XXX review */
1592         *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1593         break;
1594      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1595         *value = True; /*XXX*/
1596         break;
1597      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1598         *value = (GLX_TEXTURE_1D_BIT_EXT |
1599                   GLX_TEXTURE_2D_BIT_EXT |
1600                   GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1601         break;
1602      case GLX_Y_INVERTED_EXT:
1603         *value = True; /*XXX*/
1604         break;
1605#endif
1606
1607      default:
1608	 return GLX_BAD_ATTRIBUTE;
1609   }
1610   return Success;
1611}
1612
1613
1614PUBLIC int
1615glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1616                   int attrib, int *value )
1617{
1618   XMesaVisual xmvis;
1619   int k;
1620   if (!dpy || !visinfo)
1621      return GLX_BAD_ATTRIBUTE;
1622
1623   xmvis = find_glx_visual( dpy, visinfo );
1624   if (!xmvis) {
1625      /* this visual wasn't obtained with glXChooseVisual */
1626      xmvis = create_glx_visual( dpy, visinfo );
1627      if (!xmvis) {
1628	 /* this visual can't be used for GL rendering */
1629	 if (attrib==GLX_USE_GL) {
1630	    *value = (int) False;
1631	    return 0;
1632	 }
1633	 else {
1634	    return GLX_BAD_VISUAL;
1635	 }
1636      }
1637   }
1638
1639   k = get_config(xmvis, attrib, value, GL_FALSE);
1640   return k;
1641}
1642
1643
1644PUBLIC void
1645glXWaitGL( void )
1646{
1647   XMesaContext xmesa = XMesaGetCurrentContext();
1648   XMesaFlush( xmesa );
1649}
1650
1651
1652
1653PUBLIC void
1654glXWaitX( void )
1655{
1656   XMesaContext xmesa = XMesaGetCurrentContext();
1657   XMesaFlush( xmesa );
1658}
1659
1660
1661static const char *
1662get_extensions( void )
1663{
1664   return EXTENSIONS;
1665}
1666
1667
1668
1669/* GLX 1.1 and later */
1670PUBLIC const char *
1671glXQueryExtensionsString( Display *dpy, int screen )
1672{
1673   (void) dpy;
1674   (void) screen;
1675   return get_extensions();
1676}
1677
1678
1679
1680/* GLX 1.1 and later */
1681PUBLIC const char *
1682glXQueryServerString( Display *dpy, int screen, int name )
1683{
1684   static char version[1000];
1685   sprintf(version, "%d.%d %s",
1686	   SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
1687
1688   (void) dpy;
1689   (void) screen;
1690
1691   switch (name) {
1692      case GLX_EXTENSIONS:
1693         return get_extensions();
1694      case GLX_VENDOR:
1695	 return VENDOR;
1696      case GLX_VERSION:
1697	 return version;
1698      default:
1699         return NULL;
1700   }
1701}
1702
1703
1704
1705/* GLX 1.1 and later */
1706PUBLIC const char *
1707glXGetClientString( Display *dpy, int name )
1708{
1709   static char version[1000];
1710   sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1711	   CLIENT_MINOR_VERSION, xmesa_get_name());
1712
1713   (void) dpy;
1714
1715   switch (name) {
1716      case GLX_EXTENSIONS:
1717         return get_extensions();
1718      case GLX_VENDOR:
1719	 return VENDOR;
1720      case GLX_VERSION:
1721	 return version;
1722      default:
1723         return NULL;
1724   }
1725}
1726
1727
1728
1729/*
1730 * GLX 1.3 and later
1731 */
1732
1733
1734PUBLIC int
1735glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
1736                     int attribute, int *value)
1737{
1738   XMesaVisual v = (XMesaVisual) config;
1739   (void) dpy;
1740   (void) config;
1741
1742   if (!dpy || !config || !value)
1743      return -1;
1744
1745   return get_config(v, attribute, value, GL_TRUE);
1746}
1747
1748
1749PUBLIC GLXFBConfig *
1750glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1751{
1752   XVisualInfo *visuals, visTemplate;
1753   const long visMask = VisualScreenMask;
1754   int i;
1755
1756   /* Get list of all X visuals */
1757   visTemplate.screen = screen;
1758   visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1759   if (*nelements > 0) {
1760      XMesaVisual *results;
1761      results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1762      if (!results) {
1763         *nelements = 0;
1764         return NULL;
1765      }
1766      for (i = 0; i < *nelements; i++) {
1767         results[i] = create_glx_visual(dpy, visuals + i);
1768         if (!results[i]) {
1769            *nelements = i;
1770            break;
1771         }
1772      }
1773      return (GLXFBConfig *) results;
1774   }
1775   return NULL;
1776}
1777
1778
1779PUBLIC GLXFBConfig *
1780glXChooseFBConfig(Display *dpy, int screen,
1781                  const int *attribList, int *nitems)
1782{
1783   XMesaVisual xmvis;
1784
1785   if (!attribList || !attribList[0]) {
1786      /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1787      return glXGetFBConfigs(dpy, screen, nitems);
1788   }
1789
1790   xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1791   if (xmvis) {
1792      GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1793      if (!config) {
1794         *nitems = 0;
1795         return NULL;
1796      }
1797      *nitems = 1;
1798      config[0] = (GLXFBConfig) xmvis;
1799      return (GLXFBConfig *) config;
1800   }
1801   else {
1802      *nitems = 0;
1803      return NULL;
1804   }
1805}
1806
1807
1808PUBLIC XVisualInfo *
1809glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1810{
1811   if (dpy && config) {
1812      XMesaVisual xmvis = (XMesaVisual) config;
1813#if 0
1814      return xmvis->vishandle;
1815#else
1816      /* create a new vishandle - the cached one may be stale */
1817      xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1818      if (xmvis->vishandle) {
1819         memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1820      }
1821      return xmvis->vishandle;
1822#endif
1823   }
1824   else {
1825      return NULL;
1826   }
1827}
1828
1829
1830PUBLIC GLXWindow
1831glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
1832                const int *attribList)
1833{
1834   XMesaVisual xmvis = (XMesaVisual) config;
1835   XMesaBuffer xmbuf;
1836   if (!xmvis)
1837      return 0;
1838
1839   xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1840   if (!xmbuf)
1841      return 0;
1842
1843   (void) dpy;
1844   (void) attribList;  /* Ignored in GLX 1.3 */
1845
1846   return win;  /* A hack for now */
1847}
1848
1849
1850PUBLIC void
1851glXDestroyWindow( Display *dpy, GLXWindow window )
1852{
1853   XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1854   if (b)
1855      XMesaDestroyBuffer(b);
1856   /* don't destroy X window */
1857}
1858
1859
1860/* XXX untested */
1861PUBLIC GLXPixmap
1862glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
1863                const int *attribList)
1864{
1865   XMesaVisual v = (XMesaVisual) config;
1866   XMesaBuffer b;
1867   const int *attr;
1868   int target = 0, format = 0, mipmap = 0;
1869   int value;
1870
1871   if (!dpy || !config || !pixmap)
1872      return 0;
1873
1874   for (attr = attribList; attr && *attr; attr++) {
1875      switch (*attr) {
1876      case GLX_TEXTURE_FORMAT_EXT:
1877         attr++;
1878         switch (*attr) {
1879         case GLX_TEXTURE_FORMAT_NONE_EXT:
1880         case GLX_TEXTURE_FORMAT_RGB_EXT:
1881         case GLX_TEXTURE_FORMAT_RGBA_EXT:
1882            format = *attr;
1883            break;
1884         default:
1885            /* error */
1886            return 0;
1887         }
1888         break;
1889      case GLX_TEXTURE_TARGET_EXT:
1890         attr++;
1891         switch (*attr) {
1892         case GLX_TEXTURE_1D_EXT:
1893         case GLX_TEXTURE_2D_EXT:
1894         case GLX_TEXTURE_RECTANGLE_EXT:
1895            target = *attr;
1896            break;
1897         default:
1898            /* error */
1899            return 0;
1900         }
1901         break;
1902      case GLX_MIPMAP_TEXTURE_EXT:
1903         attr++;
1904         if (*attr)
1905            mipmap = 1;
1906         break;
1907      default:
1908         /* error */
1909         return 0;
1910      }
1911   }
1912
1913   if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1914      if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1915                     &value, GL_TRUE) != Success
1916          || !value) {
1917         return 0; /* error! */
1918      }
1919   }
1920   else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1921      if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1922                     &value, GL_TRUE) != Success
1923          || !value) {
1924         return 0; /* error! */
1925      }
1926   }
1927   if (mipmap) {
1928      if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1929                     &value, GL_TRUE) != Success
1930          || !value) {
1931         return 0; /* error! */
1932      }
1933   }
1934   if (target == GLX_TEXTURE_1D_EXT) {
1935      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1936                     &value, GL_TRUE) != Success
1937          || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1938         return 0; /* error! */
1939      }
1940   }
1941   else if (target == GLX_TEXTURE_2D_EXT) {
1942      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1943                     &value, GL_TRUE) != Success
1944          || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1945         return 0; /* error! */
1946      }
1947   }
1948   if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1949      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1950                     &value, GL_TRUE) != Success
1951          || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1952         return 0; /* error! */
1953      }
1954   }
1955
1956   if (format || target || mipmap) {
1957      /* texture from pixmap */
1958      b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1959   }
1960   else {
1961      b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1962   }
1963   if (!b) {
1964      return 0;
1965   }
1966
1967   return pixmap;
1968}
1969
1970
1971PUBLIC void
1972glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1973{
1974   XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1975   if (b)
1976      XMesaDestroyBuffer(b);
1977   /* don't destroy X pixmap */
1978}
1979
1980
1981PUBLIC GLXPbuffer
1982glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
1983{
1984   XMesaVisual xmvis = (XMesaVisual) config;
1985   XMesaBuffer xmbuf;
1986   const int *attrib;
1987   int width = 0, height = 0;
1988   GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1989
1990   (void) dpy;
1991
1992   for (attrib = attribList; *attrib; attrib++) {
1993      switch (*attrib) {
1994         case GLX_PBUFFER_WIDTH:
1995            attrib++;
1996            width = *attrib;
1997            break;
1998         case GLX_PBUFFER_HEIGHT:
1999            attrib++;
2000            height = *attrib;
2001            break;
2002         case GLX_PRESERVED_CONTENTS:
2003            attrib++;
2004            preserveContents = *attrib;
2005            break;
2006         case GLX_LARGEST_PBUFFER:
2007            attrib++;
2008            useLargest = *attrib;
2009            break;
2010         default:
2011            return 0;
2012      }
2013   }
2014
2015   if (width == 0 || height == 0)
2016      return 0;
2017
2018   if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2019      /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2020       * allocate the largest possible buffer.
2021       */
2022      if (useLargest) {
2023         width = MAX_WIDTH;
2024         height = MAX_HEIGHT;
2025      }
2026   }
2027
2028   xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2029   /* A GLXPbuffer handle must be an X Drawable because that's what
2030    * glXMakeCurrent takes.
2031    */
2032   if (xmbuf) {
2033      xmbuf->largestPbuffer = useLargest;
2034      xmbuf->preservedContents = preserveContents;
2035      return (GLXPbuffer) xmbuf->drawable;
2036   }
2037   else {
2038      return 0;
2039   }
2040}
2041
2042
2043PUBLIC void
2044glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2045{
2046   XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2047   if (b) {
2048      XMesaDestroyBuffer(b);
2049   }
2050}
2051
2052
2053PUBLIC void
2054glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
2055                 unsigned int *value)
2056{
2057   GLuint width, height;
2058   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2059   if (!xmbuf)
2060      return;
2061
2062   /* make sure buffer's dimensions are up to date */
2063   xmesa_get_window_size(dpy, xmbuf, &width, &height);
2064
2065   switch (attribute) {
2066      case GLX_WIDTH:
2067         *value = width;
2068         break;
2069      case GLX_HEIGHT:
2070         *value = height;
2071         break;
2072      case GLX_PRESERVED_CONTENTS:
2073         *value = xmbuf->preservedContents;
2074         break;
2075      case GLX_LARGEST_PBUFFER:
2076         *value = xmbuf->largestPbuffer;
2077         break;
2078      case GLX_FBCONFIG_ID:
2079         *value = xmbuf->xm_visual->visinfo->visualid;
2080         return;
2081#ifdef GLX_EXT_texture_from_pixmap
2082      case GLX_TEXTURE_FORMAT_EXT:
2083         *value = xmbuf->TextureFormat;
2084         break;
2085      case GLX_TEXTURE_TARGET_EXT:
2086         *value = xmbuf->TextureTarget;
2087         break;
2088      case GLX_MIPMAP_TEXTURE_EXT:
2089         *value = xmbuf->TextureMipmap;
2090         break;
2091#endif
2092
2093      default:
2094         return; /* raise BadValue error */
2095   }
2096}
2097
2098
2099PUBLIC GLXContext
2100glXCreateNewContext( Display *dpy, GLXFBConfig config,
2101                     int renderType, GLXContext shareCtx, Bool direct )
2102{
2103   XMesaVisual xmvis = (XMesaVisual) config;
2104
2105   if (!dpy || !config ||
2106       (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2107      return 0;
2108
2109   return create_context(dpy, xmvis,
2110                         shareCtx ? shareCtx->xmesaContext : NULL,
2111                         direct,
2112                         1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2113}
2114
2115
2116PUBLIC int
2117glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2118{
2119   GLXContext glxCtx = ctx;
2120   XMesaContext xmctx = glxCtx->xmesaContext;
2121
2122   (void) dpy;
2123   (void) ctx;
2124
2125   switch (attribute) {
2126   case GLX_FBCONFIG_ID:
2127      *value = xmctx->xm_visual->visinfo->visualid;
2128      break;
2129   case GLX_RENDER_TYPE:
2130      if (xmctx->xm_visual->mesa_visual.rgbMode)
2131         *value = GLX_RGBA_TYPE;
2132      else
2133         *value = GLX_COLOR_INDEX_TYPE;
2134      break;
2135   case GLX_SCREEN:
2136      *value = 0;
2137      return Success;
2138   default:
2139      return GLX_BAD_ATTRIBUTE;
2140   }
2141   return 0;
2142}
2143
2144
2145PUBLIC void
2146glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2147{
2148   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2149   if (xmbuf)
2150      xmbuf->selectedEvents = mask;
2151}
2152
2153
2154PUBLIC void
2155glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2156{
2157   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2158   if (xmbuf)
2159      *mask = xmbuf->selectedEvents;
2160   else
2161      *mask = 0;
2162}
2163
2164
2165
2166/*** GLX_SGI_swap_control ***/
2167
2168PUBLIC int
2169glXSwapIntervalSGI(int interval)
2170{
2171   (void) interval;
2172   return 0;
2173}
2174
2175
2176
2177/*** GLX_SGI_video_sync ***/
2178
2179static unsigned int FrameCounter = 0;
2180
2181PUBLIC int
2182glXGetVideoSyncSGI(unsigned int *count)
2183{
2184   /* this is a bogus implementation */
2185   *count = FrameCounter++;
2186   return 0;
2187}
2188
2189PUBLIC int
2190glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2191{
2192   if (divisor <= 0 || remainder < 0)
2193      return GLX_BAD_VALUE;
2194   /* this is a bogus implementation */
2195   FrameCounter++;
2196   while (FrameCounter % divisor != remainder)
2197      FrameCounter++;
2198   *count = FrameCounter;
2199   return 0;
2200}
2201
2202
2203
2204/*** GLX_SGI_make_current_read ***/
2205
2206PUBLIC Bool
2207glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
2208                      GLXContext ctx)
2209{
2210   return glXMakeContextCurrent( dpy, draw, read, ctx );
2211}
2212
2213/* not used
2214static GLXDrawable
2215glXGetCurrentReadDrawableSGI(void)
2216{
2217   return 0;
2218}
2219*/
2220
2221
2222/*** GLX_SGIX_video_source ***/
2223#if defined(_VL_H)
2224
2225PUBLIC GLXVideoSourceSGIX
2226glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
2227                            VLPath path, int nodeClass, VLNode drainNode)
2228{
2229   (void) dpy;
2230   (void) screen;
2231   (void) server;
2232   (void) path;
2233   (void) nodeClass;
2234   (void) drainNode;
2235   return 0;
2236}
2237
2238PUBLIC void
2239glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2240{
2241   (void) dpy;
2242   (void) src;
2243}
2244
2245#endif
2246
2247
2248/*** GLX_EXT_import_context ***/
2249
2250PUBLIC void
2251glXFreeContextEXT(Display *dpy, GLXContext context)
2252{
2253   (void) dpy;
2254   (void) context;
2255}
2256
2257PUBLIC GLXContextID
2258glXGetContextIDEXT(const GLXContext context)
2259{
2260   (void) context;
2261   return 0;
2262}
2263
2264PUBLIC GLXContext
2265glXImportContextEXT(Display *dpy, GLXContextID contextID)
2266{
2267   (void) dpy;
2268   (void) contextID;
2269   return 0;
2270}
2271
2272PUBLIC int
2273glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
2274                       int *value)
2275{
2276   (void) dpy;
2277   (void) context;
2278   (void) attribute;
2279   (void) value;
2280   return 0;
2281}
2282
2283
2284
2285/*** GLX_SGIX_fbconfig ***/
2286
2287PUBLIC int
2288glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
2289                         int attribute, int *value)
2290{
2291   return glXGetFBConfigAttrib(dpy, config, attribute, value);
2292}
2293
2294PUBLIC GLXFBConfigSGIX *
2295glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list,
2296                      int *nelements)
2297{
2298   return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
2299                                            attrib_list, nelements);
2300}
2301
2302
2303PUBLIC GLXPixmap
2304glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2305                                 Pixmap pixmap)
2306{
2307   XMesaVisual xmvis = (XMesaVisual) config;
2308   XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2309   return xmbuf->drawable; /* need to return an X ID */
2310}
2311
2312
2313PUBLIC GLXContext
2314glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2315                               int renderType, GLXContext shareCtx,
2316                               Bool direct)
2317{
2318   XMesaVisual xmvis = (XMesaVisual) config;
2319
2320   if (!dpy || !config ||
2321       (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2322      return 0;
2323
2324   return create_context(dpy, xmvis,
2325                         shareCtx ? shareCtx->xmesaContext : NULL,
2326                         direct,
2327                         1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2328}
2329
2330
2331PUBLIC XVisualInfo *
2332glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2333{
2334   return glXGetVisualFromFBConfig(dpy, config);
2335}
2336
2337
2338PUBLIC GLXFBConfigSGIX
2339glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2340{
2341   XMesaVisual xmvis = find_glx_visual(dpy, vis);
2342   if (!xmvis) {
2343      /* This visual wasn't found with glXChooseVisual() */
2344      xmvis = create_glx_visual(dpy, vis);
2345   }
2346
2347   return (GLXFBConfigSGIX) xmvis;
2348}
2349
2350
2351
2352/*** GLX_SGIX_pbuffer ***/
2353
2354PUBLIC GLXPbufferSGIX
2355glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2356                        unsigned int width, unsigned int height,
2357                        int *attribList)
2358{
2359   XMesaVisual xmvis = (XMesaVisual) config;
2360   XMesaBuffer xmbuf;
2361   const int *attrib;
2362   GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2363
2364   (void) dpy;
2365
2366   for (attrib = attribList; attrib && *attrib; attrib++) {
2367      switch (*attrib) {
2368         case GLX_PRESERVED_CONTENTS_SGIX:
2369            attrib++;
2370            preserveContents = *attrib; /* ignored */
2371            break;
2372         case GLX_LARGEST_PBUFFER_SGIX:
2373            attrib++;
2374            useLargest = *attrib; /* ignored */
2375            break;
2376         default:
2377            return 0;
2378      }
2379   }
2380
2381   /* not used at this time */
2382   (void) useLargest;
2383   (void) preserveContents;
2384
2385   xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2386   /* A GLXPbuffer handle must be an X Drawable because that's what
2387    * glXMakeCurrent takes.
2388    */
2389   return (GLXPbuffer) xmbuf->drawable;
2390}
2391
2392
2393PUBLIC void
2394glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2395{
2396   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2397   if (xmbuf) {
2398      XMesaDestroyBuffer(xmbuf);
2399   }
2400}
2401
2402
2403PUBLIC int
2404glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
2405                       unsigned int *value)
2406{
2407   const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2408
2409   if (!xmbuf) {
2410      /* Generate GLXBadPbufferSGIX for bad pbuffer */
2411      return 0;
2412   }
2413
2414   switch (attribute) {
2415      case GLX_PRESERVED_CONTENTS_SGIX:
2416         *value = True;
2417         break;
2418      case GLX_LARGEST_PBUFFER_SGIX:
2419         *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2420         break;
2421      case GLX_WIDTH_SGIX:
2422         *value = xmesa_buffer_width(xmbuf);
2423         break;
2424      case GLX_HEIGHT_SGIX:
2425         *value = xmesa_buffer_height(xmbuf);
2426         break;
2427      case GLX_EVENT_MASK_SGIX:
2428         *value = 0;  /* XXX might be wrong */
2429         break;
2430      default:
2431         *value = 0;
2432   }
2433   return 0;
2434}
2435
2436
2437PUBLIC void
2438glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2439{
2440   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2441   if (xmbuf) {
2442      /* Note: we'll never generate clobber events */
2443      xmbuf->selectedEvents = mask;
2444   }
2445}
2446
2447
2448PUBLIC void
2449glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
2450                        unsigned long *mask)
2451{
2452   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2453   if (xmbuf) {
2454      *mask = xmbuf->selectedEvents;
2455   }
2456   else {
2457      *mask = 0;
2458   }
2459}
2460
2461
2462
2463/*** GLX_SGI_cushion ***/
2464
2465PUBLIC void
2466glXCushionSGI(Display *dpy, Window win, float cushion)
2467{
2468   (void) dpy;
2469   (void) win;
2470   (void) cushion;
2471}
2472
2473
2474
2475/*** GLX_SGIX_video_resize ***/
2476
2477PUBLIC int
2478glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
2479                           Window window)
2480{
2481   (void) dpy;
2482   (void) screen;
2483   (void) channel;
2484   (void) window;
2485   return 0;
2486}
2487
2488PUBLIC int
2489glXChannelRectSGIX(Display *dpy, int screen, int channel,
2490                   int x, int y, int w, int h)
2491{
2492   (void) dpy;
2493   (void) screen;
2494   (void) channel;
2495   (void) x;
2496   (void) y;
2497   (void) w;
2498   (void) h;
2499   return 0;
2500}
2501
2502PUBLIC int
2503glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
2504                        int *x, int *y, int *w, int *h)
2505{
2506   (void) dpy;
2507   (void) screen;
2508   (void) channel;
2509   (void) x;
2510   (void) y;
2511   (void) w;
2512   (void) h;
2513   return 0;
2514}
2515
2516PUBLIC int
2517glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
2518                          int *dx, int *dy, int *dw, int *dh)
2519{
2520   (void) dpy;
2521   (void) screen;
2522   (void) channel;
2523   (void) dx;
2524   (void) dy;
2525   (void) dw;
2526   (void) dh;
2527   return 0;
2528}
2529
2530PUBLIC int
2531glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2532{
2533   (void) dpy;
2534   (void) screen;
2535   (void) channel;
2536   (void) synctype;
2537   return 0;
2538}
2539
2540
2541
2542/*** GLX_SGIX_dmbuffer **/
2543
2544#if defined(_DM_BUFFER_H_)
2545PUBLIC Bool
2546glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
2547                          DMparams *params, DMbuffer dmbuffer)
2548{
2549   (void) dpy;
2550   (void) pbuffer;
2551   (void) params;
2552   (void) dmbuffer;
2553   return False;
2554}
2555#endif
2556
2557
2558/*** GLX_SGIX_swap_group ***/
2559
2560PUBLIC void
2561glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2562{
2563   (void) dpy;
2564   (void) drawable;
2565   (void) member;
2566}
2567
2568
2569
2570/*** GLX_SGIX_swap_barrier ***/
2571
2572PUBLIC void
2573glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2574{
2575   (void) dpy;
2576   (void) drawable;
2577   (void) barrier;
2578}
2579
2580PUBLIC Bool
2581glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2582{
2583   (void) dpy;
2584   (void) screen;
2585   (void) max;
2586   return False;
2587}
2588
2589
2590
2591/*** GLX_SUN_get_transparent_index ***/
2592
2593PUBLIC Status
2594glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
2595                          long *pTransparent)
2596{
2597   (void) dpy;
2598   (void) overlay;
2599   (void) underlay;
2600   (void) pTransparent;
2601   return 0;
2602}
2603
2604
2605
2606/*** GLX_MESA_release_buffers ***/
2607
2608/*
2609 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2610 * (a window or pixmap) prior to destroying the GLXDrawable.
2611 */
2612PUBLIC Bool
2613glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2614{
2615   XMesaBuffer b = XMesaFindBuffer(dpy, d);
2616   if (b) {
2617      XMesaDestroyBuffer(b);
2618      return True;
2619   }
2620   return False;
2621}
2622
2623/*** GLX_EXT_texture_from_pixmap ***/
2624
2625PUBLIC void
2626glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2627                        const int *attrib_list)
2628{
2629   XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2630   if (b)
2631      XMesaBindTexImage(dpy, b, buffer, attrib_list);
2632}
2633
2634PUBLIC void
2635glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2636{
2637   XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2638   if (b)
2639      XMesaReleaseTexImage(dpy, b, buffer);
2640}
2641