fakeglx.c revision cdc920a0 
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.5
4 *
5 * Copyright (C) 1999-2008  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 * This is an emulation of the GLX API which allows Mesa/GLX-based programs
29 * to run on X servers which do not have the real GLX extension.
30 *
31 * Thanks to the contributors:
32 *
33 * Initial version:  Philip Brown (phil@bolthole.com)
34 * Better glXGetConfig() support: Armin Liebchen (liebchen@asylum.cs.utah.edu)
35 * Further visual-handling refinements: Wolfram Gloger
36 *    (wmglo@Dent.MED.Uni-Muenchen.DE).
37 *
38 * Notes:
39 *   Don't be fooled, stereo isn't supported yet.
40 */
41
42
43
44#include "glxheader.h"
45#include "glxapi.h"
46#include "main/context.h"
47#include "main/config.h"
48#include "main/macros.h"
49#include "main/imports.h"
50#include "main/mtypes.h"
51#include "main/version.h"
52#include "xfonts.h"
53#include "xmesaP.h"
54
55#ifdef __VMS
56#define sprintf sprintf
57#endif
58
59/* This indicates the client-side GLX API and GLX encoder version. */
60#define CLIENT_MAJOR_VERSION 1
61#define CLIENT_MINOR_VERSION 4  /* but don't have 1.3's pbuffers, etc yet */
62
63/* This indicates the server-side GLX decoder version.
64 * GLX 1.4 indicates OpenGL 1.3 support
65 */
66#define SERVER_MAJOR_VERSION 1
67#define SERVER_MINOR_VERSION 4
68
69/* This is appended onto the glXGetClient/ServerString version strings. */
70#define MESA_GLX_VERSION "Mesa " MESA_VERSION_STRING
71
72/* Who implemented this GLX? */
73#define VENDOR "Brian Paul"
74
75#define EXTENSIONS \
76   "GLX_MESA_set_3dfx_mode " \
77   "GLX_MESA_copy_sub_buffer " \
78   "GLX_MESA_pixmap_colormap " \
79   "GLX_MESA_release_buffers " \
80   "GLX_ARB_get_proc_address " \
81   "GLX_EXT_texture_from_pixmap " \
82   "GLX_EXT_visual_info " \
83   "GLX_EXT_visual_rating " \
84   /*"GLX_SGI_video_sync "*/ \
85   "GLX_SGIX_fbconfig " \
86   "GLX_SGIX_pbuffer "
87
88/*
89 * Our fake GLX context will contain a "real" GLX context and an XMesa context.
90 *
91 * Note that a pointer to a __GLXcontext is a pointer to a fake_glx_context,
92 * and vice versa.
93 *
94 * We really just need this structure in order to make the libGL functions
95 * glXGetCurrentContext(), glXGetCurrentDrawable() and glXGetCurrentDisplay()
96 * work correctly.
97 */
98struct fake_glx_context {
99   __GLXcontext glxContext;   /* this MUST be first! */
100   XMesaContext xmesaContext;
101};
102
103
104
105/**********************************************************************/
106/***                       GLX Visual Code                          ***/
107/**********************************************************************/
108
109#define DONT_CARE -1
110
111
112static XMesaVisual *VisualTable = NULL;
113static int NumVisuals = 0;
114
115
116/*
117 * This struct and some code fragments borrowed
118 * from Mark Kilgard's GLUT library.
119 */
120typedef struct _OverlayInfo {
121  /* Avoid 64-bit portability problems by being careful to use
122     longs due to the way XGetWindowProperty is specified. Note
123     that these parameters are passed as CARD32s over X
124     protocol. */
125  unsigned long overlay_visual;
126  long transparent_type;
127  long value;
128  long layer;
129} OverlayInfo;
130
131
132
133/* Macro to handle c_class vs class field name in XVisualInfo struct */
134#if defined(__cplusplus) || defined(c_plusplus)
135#define CLASS c_class
136#else
137#define CLASS class
138#endif
139
140
141
142/*
143 * Test if the given XVisualInfo is usable for Mesa rendering.
144 */
145static GLboolean
146is_usable_visual( XVisualInfo *vinfo )
147{
148   switch (vinfo->CLASS) {
149      case StaticGray:
150      case GrayScale:
151         /* Any StaticGray/GrayScale visual works in RGB or CI mode */
152         return GL_TRUE;
153      case StaticColor:
154      case PseudoColor:
155	 /* Color-index rendering is not supported. */
156	 return GL_FALSE;
157      case TrueColor:
158      case DirectColor:
159	 /* Any depth of TrueColor or DirectColor works in RGB mode */
160	 return GL_TRUE;
161      default:
162	 /* This should never happen */
163	 return GL_FALSE;
164   }
165}
166
167
168
169/**
170 * Get an array OverlayInfo records for specified screen.
171 * \param dpy  the display
172 * \param screen  screen number
173 * \param numOverlays  returns numver of OverlayInfo records
174 * \return  pointer to OverlayInfo array, free with XFree()
175 */
176static OverlayInfo *
177GetOverlayInfo(Display *dpy, int screen, int *numOverlays)
178{
179   Atom overlayVisualsAtom;
180   Atom actualType;
181   Status status;
182   unsigned char *ovInfo;
183   unsigned long sizeData, bytesLeft;
184   int actualFormat;
185
186   /*
187    * The SERVER_OVERLAY_VISUALS property on the root window contains
188    * a list of overlay visuals.  Get that list now.
189    */
190   overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
191   if (overlayVisualsAtom == None) {
192      return 0;
193   }
194
195   status = XGetWindowProperty(dpy, RootWindow(dpy, screen),
196                               overlayVisualsAtom, 0L, (long) 10000, False,
197                               overlayVisualsAtom, &actualType, &actualFormat,
198                               &sizeData, &bytesLeft,
199                               &ovInfo);
200
201   if (status != Success || actualType != overlayVisualsAtom ||
202       actualFormat != 32 || sizeData < 4) {
203      /* something went wrong */
204      XFree((void *) ovInfo);
205      *numOverlays = 0;
206      return NULL;
207   }
208
209   *numOverlays = sizeData / 4;
210   return (OverlayInfo *) ovInfo;
211}
212
213
214
215/**
216 * Return the level (overlay, normal, underlay) of a given XVisualInfo.
217 * Input:  dpy - the X display
218 *         vinfo - the XVisualInfo to test
219 * Return:  level of the visual:
220 *             0 = normal planes
221 *            >0 = overlay planes
222 *            <0 = underlay planes
223 */
224static int
225level_of_visual( Display *dpy, XVisualInfo *vinfo )
226{
227   OverlayInfo *overlay_info;
228   int numOverlaysPerScreen, i;
229
230   overlay_info = GetOverlayInfo(dpy, vinfo->screen, &numOverlaysPerScreen);
231   if (!overlay_info) {
232      return 0;
233   }
234
235   /* search the overlay visual list for the visual ID of interest */
236   for (i = 0; i < numOverlaysPerScreen; i++) {
237      const OverlayInfo *ov = overlay_info + i;
238      if (ov->overlay_visual == vinfo->visualid) {
239         /* found the visual */
240         if (/*ov->transparent_type==1 &&*/ ov->layer!=0) {
241            int level = ov->layer;
242            XFree((void *) overlay_info);
243            return level;
244         }
245         else {
246            XFree((void *) overlay_info);
247            return 0;
248         }
249      }
250   }
251
252   /* The visual ID was not found in the overlay list. */
253   XFree((void *) overlay_info);
254   return 0;
255}
256
257
258
259
260/*
261 * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
262 * configuration in our list of GLX visuals.
263 */
264static XMesaVisual
265save_glx_visual( Display *dpy, XVisualInfo *vinfo,
266                 GLboolean alphaFlag, GLboolean dbFlag,
267                 GLboolean stereoFlag,
268                 GLint depth_size, GLint stencil_size,
269                 GLint accumRedSize, GLint accumGreenSize,
270                 GLint accumBlueSize, GLint accumAlphaSize,
271                 GLint level, GLint numAuxBuffers )
272{
273   GLboolean ximageFlag = GL_TRUE;
274   XMesaVisual xmvis;
275   GLint i;
276   GLboolean comparePointers;
277
278   if (dbFlag) {
279      /* Check if the MESA_BACK_BUFFER env var is set */
280      char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
281      if (backbuffer) {
282         if (backbuffer[0]=='p' || backbuffer[0]=='P') {
283            ximageFlag = GL_FALSE;
284         }
285         else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
286            ximageFlag = GL_TRUE;
287         }
288         else {
289            _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
290         }
291      }
292   }
293
294   if (stereoFlag) {
295      /* stereo not supported */
296      return NULL;
297   }
298
299   /* Comparing IDs uses less memory but sometimes fails. */
300   /* XXX revisit this after 3.0 is finished. */
301   if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
302      comparePointers = GL_TRUE;
303   else
304      comparePointers = GL_FALSE;
305
306   /* Force the visual to have an alpha channel */
307   if (_mesa_getenv("MESA_GLX_FORCE_ALPHA"))
308      alphaFlag = GL_TRUE;
309
310   /* First check if a matching visual is already in the list */
311   for (i=0; i<NumVisuals; i++) {
312      XMesaVisual v = VisualTable[i];
313      if (v->display == dpy
314          && v->mesa_visual.level == level
315          && v->mesa_visual.numAuxBuffers == numAuxBuffers
316          && v->ximage_flag == ximageFlag
317          && v->mesa_visual.doubleBufferMode == dbFlag
318          && v->mesa_visual.stereoMode == stereoFlag
319          && (v->mesa_visual.alphaBits > 0) == alphaFlag
320          && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
321          && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
322          && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
323          && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
324          && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
325          && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
326         /* now either compare XVisualInfo pointers or visual IDs */
327         if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
328             || (comparePointers && v->vishandle == vinfo)) {
329            return v;
330         }
331      }
332   }
333
334   /* Create a new visual and add it to the list. */
335
336   xmvis = XMesaCreateVisual( dpy, vinfo, GL_TRUE, alphaFlag, dbFlag,
337                              stereoFlag, ximageFlag,
338                              depth_size, stencil_size,
339                              accumRedSize, accumBlueSize,
340                              accumBlueSize, accumAlphaSize, 0, level,
341                              GLX_NONE_EXT );
342   if (xmvis) {
343      /* Save a copy of the pointer now so we can find this visual again
344       * if we need to search for it in find_glx_visual().
345       */
346      xmvis->vishandle = vinfo;
347      /* Allocate more space for additional visual */
348      VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
349                                   sizeof(XMesaVisual) * NumVisuals,
350                                   sizeof(XMesaVisual) * (NumVisuals + 1));
351      /* add xmvis to the list */
352      VisualTable[NumVisuals] = xmvis;
353      NumVisuals++;
354      /* XXX minor hack, because XMesaCreateVisual doesn't support an
355       * aux buffers parameter.
356       */
357      xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
358   }
359   return xmvis;
360}
361
362
363/**
364 * Return the default number of bits for the Z buffer.
365 * If defined, use the MESA_GLX_DEPTH_BITS env var value.
366 * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
367 * XXX probably do the same thing for stencil, accum, etc.
368 */
369static GLint
370default_depth_bits(void)
371{
372   int zBits;
373   const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
374   if (zEnv)
375      zBits = atoi(zEnv);
376   else
377      zBits = DEFAULT_SOFTWARE_DEPTH_BITS;
378   return zBits;
379}
380
381static GLint
382default_alpha_bits(void)
383{
384   int aBits;
385   const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
386   if (aEnv)
387      aBits = atoi(aEnv);
388   else
389      aBits = 0;
390   return aBits;
391}
392
393static GLint
394default_accum_bits(void)
395{
396   return 16;
397}
398
399
400
401/*
402 * Create a GLX visual from a regular XVisualInfo.
403 * This is called when Fake GLX is given an XVisualInfo which wasn't
404 * returned by glXChooseVisual.  Since this is the first time we're
405 * considering this visual we'll take a guess at reasonable values
406 * for depth buffer size, stencil size, accum size, etc.
407 * This is the best we can do with a client-side emulation of GLX.
408 */
409static XMesaVisual
410create_glx_visual( Display *dpy, XVisualInfo *visinfo )
411{
412   int vislevel;
413   GLint zBits = default_depth_bits();
414   GLint accBits = default_accum_bits();
415   GLboolean alphaFlag = default_alpha_bits() > 0;
416
417   vislevel = level_of_visual( dpy, visinfo );
418   if (vislevel) {
419      /* Color-index rendering to overlays is not supported. */
420      return NULL;
421   }
422   else if (is_usable_visual( visinfo )) {
423      /* Configure this visual as RGB, double-buffered, depth-buffered. */
424      /* This is surely wrong for some people's needs but what else */
425      /* can be done?  They should use glXChooseVisual(). */
426      return save_glx_visual( dpy, visinfo,
427			      alphaFlag, /* alpha */
428			      GL_TRUE,   /* double */
429			      GL_FALSE,  /* stereo */
430			      zBits,
431			      STENCIL_BITS,
432			      accBits, /* r */
433			      accBits, /* g */
434			      accBits, /* b */
435			      accBits, /* a */
436			      0,         /* level */
437			      0          /* numAux */
438			      );
439   }
440   else {
441      _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
442      return NULL;
443   }
444}
445
446
447
448/*
449 * Find the GLX visual associated with an XVisualInfo.
450 */
451static XMesaVisual
452find_glx_visual( Display *dpy, XVisualInfo *vinfo )
453{
454   int i;
455
456   /* try to match visual id */
457   for (i=0;i<NumVisuals;i++) {
458      if (VisualTable[i]->display==dpy
459          && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
460         return VisualTable[i];
461      }
462   }
463
464   /* if that fails, try to match pointers */
465   for (i=0;i<NumVisuals;i++) {
466      if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
467         return VisualTable[i];
468      }
469   }
470
471   return NULL;
472}
473
474
475
476/**
477 * Return the transparent pixel value for a GLX visual.
478 * Input:  glxvis - the glx_visual
479 * Return:  a pixel value or -1 if no transparent pixel
480 */
481static int
482transparent_pixel( XMesaVisual glxvis )
483{
484   Display *dpy = glxvis->display;
485   XVisualInfo *vinfo = glxvis->visinfo;
486   OverlayInfo *overlay_info;
487   int numOverlaysPerScreen, i;
488
489   overlay_info = GetOverlayInfo(dpy, vinfo->screen, &numOverlaysPerScreen);
490   if (!overlay_info) {
491      return -1;
492   }
493
494   for (i = 0; i < numOverlaysPerScreen; i++) {
495      const OverlayInfo *ov = overlay_info + i;
496      if (ov->overlay_visual == vinfo->visualid) {
497         /* found it! */
498         if (ov->transparent_type == 0) {
499            /* type 0 indicates no transparency */
500            XFree((void *) overlay_info);
501            return -1;
502         }
503         else {
504            /* ov->value is the transparent pixel */
505            XFree((void *) overlay_info);
506            return ov->value;
507         }
508      }
509   }
510
511   /* The visual ID was not found in the overlay list. */
512   XFree((void *) overlay_info);
513   return -1;
514}
515
516
517
518/**
519 * Try to get an X visual which matches the given arguments.
520 */
521static XVisualInfo *
522get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
523{
524   XVisualInfo temp, *vis;
525   long mask;
526   int n;
527   unsigned int default_depth;
528   int default_class;
529
530   mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
531   temp.screen = scr;
532   temp.depth = depth;
533   temp.CLASS = xclass;
534
535   default_depth = DefaultDepth(dpy,scr);
536   default_class = DefaultVisual(dpy,scr)->CLASS;
537
538   if (depth==default_depth && xclass==default_class) {
539      /* try to get root window's visual */
540      temp.visualid = DefaultVisual(dpy,scr)->visualid;
541      mask |= VisualIDMask;
542   }
543
544   vis = XGetVisualInfo( dpy, mask, &temp, &n );
545
546   /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
547    * An SGI Infinite Reality system, for example, can have 30bpp pixels:
548    * 10 bits per color channel.  Mesa's limited to a max of 8 bits/channel.
549    */
550   if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
551      if (_mesa_bitcount((GLuint) vis->red_mask  ) <= 8 &&
552          _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
553          _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
554         return vis;
555      }
556      else {
557         XFree((void *) vis);
558         return NULL;
559      }
560   }
561
562   return vis;
563}
564
565
566
567/*
568 * Retrieve the value of the given environment variable and find
569 * the X visual which matches it.
570 * Input:  dpy - the display
571 *         screen - the screen number
572 *         varname - the name of the environment variable
573 * Return:  an XVisualInfo pointer to NULL if error.
574 */
575static XVisualInfo *
576get_env_visual(Display *dpy, int scr, const char *varname)
577{
578   char value[100], type[100];
579   int depth, xclass = -1;
580   XVisualInfo *vis;
581
582   if (!_mesa_getenv( varname )) {
583      return NULL;
584   }
585
586   strncpy( value, _mesa_getenv(varname), 100 );
587   value[99] = 0;
588
589   sscanf( value, "%s %d", type, &depth );
590
591   if (strcmp(type,"TrueColor")==0)          xclass = TrueColor;
592   else if (strcmp(type,"DirectColor")==0)   xclass = DirectColor;
593   else if (strcmp(type,"GrayScale")==0)     xclass = GrayScale;
594   else if (strcmp(type,"StaticGray")==0)    xclass = StaticGray;
595
596   if (xclass>-1 && depth>0) {
597      vis = get_visual( dpy, scr, depth, xclass );
598      if (vis) {
599	 return vis;
600      }
601   }
602
603   _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
604                 type, depth);
605
606   return NULL;
607}
608
609
610
611/*
612 * Select an X visual which satisfies the RGBA/CI flag and minimum depth.
613 * Input:  dpy, screen - X display and screen number
614 *         min_depth - minimum visual depth
615 *         preferred_class - preferred GLX visual class or DONT_CARE
616 * Return:  pointer to an XVisualInfo or NULL.
617 */
618static XVisualInfo *
619choose_x_visual(Display *dpy, int screen, int min_depth, int preferred_class)
620{
621   XVisualInfo *vis;
622   int xclass, visclass = 0;
623   int depth;
624
625   /* First see if the MESA_RGB_VISUAL env var is defined */
626   vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
627   if (vis) {
628      return vis;
629   }
630   /* Otherwise, search for a suitable visual */
631   if (preferred_class==DONT_CARE) {
632      for (xclass=0;xclass<4;xclass++) {
633	 switch (xclass) {
634	 case 0:  visclass = TrueColor;    break;
635	 case 1:  visclass = DirectColor;  break;
636	 case 2:  visclass = GrayScale;    break;
637	 case 3:  visclass = StaticGray;   break;
638	 }
639	 if (min_depth==0) {
640	    /* start with shallowest */
641	    for (depth=0;depth<=32;depth++) {
642	       vis = get_visual( dpy, screen, depth, visclass );
643	       if (vis) {
644		  return vis;
645	       }
646	    }
647	 }
648	 else {
649	    /* start with deepest */
650	    for (depth=32;depth>=min_depth;depth--) {
651	       vis = get_visual( dpy, screen, depth, visclass );
652	       if (vis) {
653		  return vis;
654	       }
655	    }
656	 }
657      }
658   }
659   else {
660      /* search for a specific visual class */
661      switch (preferred_class) {
662      case GLX_TRUE_COLOR_EXT:    visclass = TrueColor;    break;
663      case GLX_DIRECT_COLOR_EXT:  visclass = DirectColor;  break;
664      case GLX_GRAY_SCALE_EXT:    visclass = GrayScale;    break;
665      case GLX_STATIC_GRAY_EXT:   visclass = StaticGray;   break;
666      case GLX_PSEUDO_COLOR_EXT:
667      case GLX_STATIC_COLOR_EXT:
668      default:   return NULL;
669      }
670      if (min_depth==0) {
671	 /* start with shallowest */
672	 for (depth=0;depth<=32;depth++) {
673	    vis = get_visual( dpy, screen, depth, visclass );
674	    if (vis) {
675	       return vis;
676	    }
677	 }
678      }
679      else {
680	 /* start with deepest */
681	 for (depth=32;depth>=min_depth;depth--) {
682	    vis = get_visual( dpy, screen, depth, visclass );
683	    if (vis) {
684	       return vis;
685	    }
686	 }
687      }
688   }
689
690   /* didn't find a visual */
691   return NULL;
692}
693
694
695
696/*
697 * Find the deepest X over/underlay visual of at least min_depth.
698 * Input:  dpy, screen - X display and screen number
699 *         level - the over/underlay level
700 *         trans_type - transparent pixel type: GLX_NONE_EXT,
701 *                      GLX_TRANSPARENT_RGB_EXT, GLX_TRANSPARENT_INDEX_EXT,
702 *                      or DONT_CARE
703 *         trans_value - transparent pixel value or DONT_CARE
704 *         min_depth - minimum visual depth
705 *         preferred_class - preferred GLX visual class or DONT_CARE
706 * Return:  pointer to an XVisualInfo or NULL.
707 */
708static XVisualInfo *
709choose_x_overlay_visual( Display *dpy, int scr,
710                         int level, int trans_type, int trans_value,
711                         int min_depth, int preferred_class )
712{
713   OverlayInfo *overlay_info;
714   int numOverlaysPerScreen;
715   int i;
716   XVisualInfo *deepvis;
717   int deepest;
718
719   /*DEBUG int tt, tv; */
720
721   switch (preferred_class) {
722      case GLX_TRUE_COLOR_EXT:    preferred_class = TrueColor;    break;
723      case GLX_DIRECT_COLOR_EXT:  preferred_class = DirectColor;  break;
724      case GLX_PSEUDO_COLOR_EXT:  preferred_class = PseudoColor;  break;
725      case GLX_STATIC_COLOR_EXT:  preferred_class = StaticColor;  break;
726      case GLX_GRAY_SCALE_EXT:    preferred_class = GrayScale;    break;
727      case GLX_STATIC_GRAY_EXT:   preferred_class = StaticGray;   break;
728      default:                    preferred_class = DONT_CARE;
729   }
730
731   overlay_info = GetOverlayInfo(dpy, scr, &numOverlaysPerScreen);
732   if (!overlay_info) {
733      return NULL;
734   }
735
736   /* Search for the deepest overlay which satisifies all criteria. */
737   deepest = min_depth;
738   deepvis = NULL;
739
740   for (i = 0; i < numOverlaysPerScreen; i++) {
741      const OverlayInfo *ov = overlay_info + i;
742      XVisualInfo *vislist, vistemplate;
743      int count;
744
745      if (ov->layer!=level) {
746         /* failed overlay level criteria */
747         continue;
748      }
749      if (!(trans_type==DONT_CARE
750            || (trans_type==GLX_TRANSPARENT_INDEX_EXT
751                && ov->transparent_type>0)
752            || (trans_type==GLX_NONE_EXT && ov->transparent_type==0))) {
753         /* failed transparent pixel type criteria */
754         continue;
755      }
756      if (trans_value!=DONT_CARE && trans_value!=ov->value) {
757         /* failed transparent pixel value criteria */
758         continue;
759      }
760
761      /* get XVisualInfo and check the depth */
762      vistemplate.visualid = ov->overlay_visual;
763      vistemplate.screen = scr;
764      vislist = XGetVisualInfo( dpy, VisualIDMask | VisualScreenMask,
765                                &vistemplate, &count );
766
767      if (count!=1) {
768         /* something went wrong */
769         continue;
770      }
771      if (preferred_class!=DONT_CARE && preferred_class!=vislist->CLASS) {
772         /* wrong visual class */
773         continue;
774      }
775
776      /* Color-index rendering is not supported.  Make sure we have True/DirectColor */
777      if (vislist->CLASS != TrueColor && vislist->CLASS != DirectColor)
778         continue;
779
780      if (deepvis==NULL || vislist->depth > deepest) {
781         /* YES!  found a satisfactory visual */
782         if (deepvis) {
783            XFree( deepvis );
784         }
785         deepest = vislist->depth;
786         deepvis = vislist;
787         /* DEBUG  tt = ov->transparent_type;*/
788         /* DEBUG  tv = ov->value; */
789      }
790   }
791
792/*DEBUG
793   if (deepvis) {
794      printf("chose 0x%x:  layer=%d depth=%d trans_type=%d trans_value=%d\n",
795             deepvis->visualid, level, deepvis->depth, tt, tv );
796   }
797*/
798   return deepvis;
799}
800
801
802/**********************************************************************/
803/***             Display-related functions                          ***/
804/**********************************************************************/
805
806
807/**
808 * Free all XMesaVisuals which are associated with the given display.
809 */
810static void
811destroy_visuals_on_display(Display *dpy)
812{
813   int i;
814   for (i = 0; i < NumVisuals; i++) {
815      if (VisualTable[i]->display == dpy) {
816         /* remove this visual */
817         int j;
818         free(VisualTable[i]);
819         for (j = i; j < NumVisuals - 1; j++)
820            VisualTable[j] = VisualTable[j + 1];
821         NumVisuals--;
822      }
823   }
824}
825
826
827/**
828 * Called from XCloseDisplay() to let us free our display-related data.
829 */
830static int
831close_display_callback(Display *dpy, XExtCodes *codes)
832{
833   destroy_visuals_on_display(dpy);
834   xmesa_destroy_buffers_on_display(dpy);
835   return 0;
836}
837
838
839/**
840 * Look for the named extension on given display and return a pointer
841 * to the _XExtension data, or NULL if extension not found.
842 */
843static _XExtension *
844lookup_extension(Display *dpy, const char *extName)
845{
846   _XExtension *ext;
847   for (ext = dpy->ext_procs; ext; ext = ext->next) {
848      if (ext->name && strcmp(ext->name, extName) == 0) {
849         return ext;
850      }
851   }
852   return NULL;
853}
854
855
856/**
857 * Whenever we're given a new Display pointer, call this function to
858 * register our close_display_callback function.
859 */
860static void
861register_with_display(Display *dpy)
862{
863   const char *extName = "MesaGLX";
864   _XExtension *ext;
865
866   ext = lookup_extension(dpy, extName);
867   if (!ext) {
868      XExtCodes *c = XAddExtension(dpy);
869      ext = dpy->ext_procs;  /* new extension is at head of list */
870      assert(c->extension == ext->codes.extension);
871      ext->name = _mesa_strdup(extName);
872      ext->close_display = close_display_callback;
873   }
874}
875
876
877/**********************************************************************/
878/***                  Begin Fake GLX API Functions                  ***/
879/**********************************************************************/
880
881
882/**
883 * Helper used by glXChooseVisual and glXChooseFBConfig.
884 * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
885 * the later.
886 * In either case, the attribute list is terminated with the value 'None'.
887 */
888static XMesaVisual
889choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
890{
891   const GLboolean rgbModeDefault = fbConfig;
892   const int *parselist;
893   XVisualInfo *vis;
894   int min_ci = 0;
895   int min_red=0, min_green=0, min_blue=0;
896   GLboolean rgb_flag = rgbModeDefault;
897   GLboolean alpha_flag = GL_FALSE;
898   GLboolean double_flag = GL_FALSE;
899   GLboolean stereo_flag = GL_FALSE;
900   GLint depth_size = 0;
901   GLint stencil_size = 0;
902   GLint accumRedSize = 0;
903   GLint accumGreenSize = 0;
904   GLint accumBlueSize = 0;
905   GLint accumAlphaSize = 0;
906   int level = 0;
907   int visual_type = DONT_CARE;
908   int trans_type = DONT_CARE;
909   int trans_value = DONT_CARE;
910   GLint caveat = DONT_CARE;
911   XMesaVisual xmvis = NULL;
912   int desiredVisualID = -1;
913   int numAux = 0;
914
915   parselist = list;
916
917   while (*parselist) {
918
919      switch (*parselist) {
920	 case GLX_USE_GL:
921            if (fbConfig) {
922               /* invalid token */
923               return NULL;
924            }
925            else {
926               /* skip */
927               parselist++;
928            }
929	    break;
930	 case GLX_BUFFER_SIZE:
931	    parselist++;
932	    min_ci = *parselist++;
933	    break;
934	 case GLX_LEVEL:
935	    parselist++;
936            level = *parselist++;
937	    break;
938	 case GLX_RGBA:
939            if (fbConfig) {
940               /* invalid token */
941               return NULL;
942            }
943            else {
944               rgb_flag = GL_TRUE;
945               parselist++;
946            }
947	    break;
948	 case GLX_DOUBLEBUFFER:
949            parselist++;
950            if (fbConfig) {
951               double_flag = *parselist++;
952            }
953            else {
954               double_flag = GL_TRUE;
955            }
956	    break;
957	 case GLX_STEREO:
958            parselist++;
959            if (fbConfig) {
960               stereo_flag = *parselist++;
961            }
962            else {
963               stereo_flag = GL_TRUE;
964            }
965            break;
966	 case GLX_AUX_BUFFERS:
967	    parselist++;
968            numAux = *parselist++;
969            if (numAux > MAX_AUX_BUFFERS)
970               return NULL;
971	    break;
972	 case GLX_RED_SIZE:
973	    parselist++;
974	    min_red = *parselist++;
975	    break;
976	 case GLX_GREEN_SIZE:
977	    parselist++;
978	    min_green = *parselist++;
979	    break;
980	 case GLX_BLUE_SIZE:
981	    parselist++;
982	    min_blue = *parselist++;
983	    break;
984	 case GLX_ALPHA_SIZE:
985	    parselist++;
986            {
987               GLint size = *parselist++;
988               alpha_flag = size ? GL_TRUE : GL_FALSE;
989            }
990	    break;
991	 case GLX_DEPTH_SIZE:
992	    parselist++;
993	    depth_size = *parselist++;
994	    break;
995	 case GLX_STENCIL_SIZE:
996	    parselist++;
997	    stencil_size = *parselist++;
998	    break;
999	 case GLX_ACCUM_RED_SIZE:
1000	    parselist++;
1001            {
1002               GLint size = *parselist++;
1003               accumRedSize = MAX2( accumRedSize, size );
1004            }
1005            break;
1006	 case GLX_ACCUM_GREEN_SIZE:
1007	    parselist++;
1008            {
1009               GLint size = *parselist++;
1010               accumGreenSize = MAX2( accumGreenSize, size );
1011            }
1012            break;
1013	 case GLX_ACCUM_BLUE_SIZE:
1014	    parselist++;
1015            {
1016               GLint size = *parselist++;
1017               accumBlueSize = MAX2( accumBlueSize, size );
1018            }
1019            break;
1020	 case GLX_ACCUM_ALPHA_SIZE:
1021	    parselist++;
1022            {
1023               GLint size = *parselist++;
1024               accumAlphaSize = MAX2( accumAlphaSize, size );
1025            }
1026	    break;
1027
1028         /*
1029          * GLX_EXT_visual_info extension
1030          */
1031         case GLX_X_VISUAL_TYPE_EXT:
1032            parselist++;
1033            visual_type = *parselist++;
1034            break;
1035         case GLX_TRANSPARENT_TYPE_EXT:
1036            parselist++;
1037            trans_type = *parselist++;
1038            break;
1039         case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1040            parselist++;
1041            trans_value = *parselist++;
1042            break;
1043         case GLX_TRANSPARENT_RED_VALUE_EXT:
1044         case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1045         case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1046         case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1047	    /* ignore */
1048	    parselist++;
1049	    parselist++;
1050	    break;
1051
1052         /*
1053          * GLX_EXT_visual_info extension
1054          */
1055         case GLX_VISUAL_CAVEAT_EXT:
1056            parselist++;
1057            caveat = *parselist++; /* ignored for now */
1058            break;
1059
1060         /*
1061          * GLX_ARB_multisample
1062          */
1063         case GLX_SAMPLE_BUFFERS_ARB:
1064         case GLX_SAMPLES_ARB:
1065	    parselist++;
1066	    if (*parselist++ != 0)
1067	       /* ms not supported */
1068	       return NULL;
1069	    break;
1070
1071         /*
1072          * FBConfig attribs.
1073          */
1074         case GLX_RENDER_TYPE:
1075            if (!fbConfig)
1076               return NULL;
1077            parselist++;
1078            if (*parselist & GLX_RGBA_BIT) {
1079               rgb_flag = GL_TRUE;
1080            }
1081            else if (*parselist & GLX_COLOR_INDEX_BIT) {
1082               rgb_flag = GL_FALSE;
1083            }
1084            else if (*parselist == 0) {
1085               rgb_flag = GL_TRUE;
1086            }
1087            parselist++;
1088            break;
1089         case GLX_DRAWABLE_TYPE:
1090            if (!fbConfig)
1091               return NULL;
1092            parselist++;
1093            if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
1094               return NULL; /* bad bit */
1095            }
1096            parselist++;
1097            break;
1098         case GLX_FBCONFIG_ID:
1099            if (!fbConfig)
1100               return NULL;
1101            parselist++;
1102            desiredVisualID = *parselist++;
1103            break;
1104         case GLX_X_RENDERABLE:
1105            if (!fbConfig)
1106               return NULL;
1107            parselist += 2;
1108            /* ignore */
1109            break;
1110
1111#ifdef GLX_EXT_texture_from_pixmap
1112         case GLX_BIND_TO_TEXTURE_RGB_EXT:
1113            parselist++; /*skip*/
1114            break;
1115         case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1116            parselist++; /*skip*/
1117            break;
1118         case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1119            parselist++; /*skip*/
1120            break;
1121         case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1122            parselist++;
1123            if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
1124                               GLX_TEXTURE_2D_BIT_EXT |
1125                               GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
1126               /* invalid bit */
1127               return NULL;
1128            }
1129            break;
1130         case GLX_Y_INVERTED_EXT:
1131            parselist++; /*skip*/
1132            break;
1133#endif
1134
1135	 case None:
1136            /* end of list */
1137	    break;
1138
1139	 default:
1140	    /* undefined attribute */
1141            _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
1142                          *parselist);
1143	    return NULL;
1144      }
1145   }
1146
1147   if (!rgb_flag)
1148      return NULL;
1149
1150   (void) caveat;
1151
1152   /*
1153    * Since we're only simulating the GLX extension this function will never
1154    * find any real GL visuals.  Instead, all we can do is try to find an RGB
1155    * or CI visual of appropriate depth.  Other requested attributes such as
1156    * double buffering, depth buffer, etc. will be associated with the X
1157    * visual and stored in the VisualTable[].
1158    */
1159   if (desiredVisualID != -1) {
1160      /* try to get a specific visual, by visualID */
1161      XVisualInfo temp;
1162      int n;
1163      temp.visualid = desiredVisualID;
1164      temp.screen = screen;
1165      vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
1166      if (vis) {
1167         /* give the visual some useful GLX attributes */
1168         double_flag = GL_TRUE;
1169         if (vis->depth <= 8)
1170	    return NULL;
1171         depth_size = default_depth_bits();
1172         stencil_size = STENCIL_BITS;
1173         /* XXX accum??? */
1174      }
1175   }
1176   else {
1177      /* RGB visual */
1178      int min_rgb = min_red + min_green + min_blue;
1179      if (min_rgb>1 && min_rgb<8) {
1180	 /* a special case to be sure we can get a monochrome visual */
1181	 min_rgb = 1;
1182      }
1183
1184      if (level==0) {
1185	 vis = choose_x_visual(dpy, screen, min_rgb, visual_type);
1186      }
1187      else {
1188	 vis = choose_x_overlay_visual(dpy, screen, level,
1189				       trans_type, trans_value, min_rgb, visual_type);
1190      }
1191   }
1192
1193   if (vis) {
1194      /* Note: we're not exactly obeying the glXChooseVisual rules here.
1195       * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
1196       * largest depth buffer size, which is 32bits/value.  Instead, we
1197       * return 16 to maintain performance with earlier versions of Mesa.
1198       */
1199      if (depth_size > 24)
1200         depth_size = 32;
1201      else if (depth_size > 16)
1202         depth_size = 24;
1203      else if (depth_size > 0) {
1204         depth_size = default_depth_bits();
1205      }
1206
1207      if (!alpha_flag) {
1208         alpha_flag = default_alpha_bits() > 0;
1209      }
1210
1211      /* we only support one size of stencil and accum buffers. */
1212      if (stencil_size > 0)
1213         stencil_size = STENCIL_BITS;
1214      if (accumRedSize > 0 || accumGreenSize > 0 || accumBlueSize > 0 ||
1215          accumAlphaSize > 0) {
1216         accumRedSize =
1217         accumGreenSize =
1218         accumBlueSize = default_accum_bits();
1219         accumAlphaSize = alpha_flag ? accumRedSize : 0;
1220      }
1221
1222      xmvis = save_glx_visual( dpy, vis, alpha_flag, double_flag,
1223                               stereo_flag, depth_size, stencil_size,
1224                               accumRedSize, accumGreenSize,
1225                               accumBlueSize, accumAlphaSize, level, numAux );
1226   }
1227
1228   return xmvis;
1229}
1230
1231
1232static XVisualInfo *
1233Fake_glXChooseVisual( Display *dpy, int screen, int *list )
1234{
1235   XMesaVisual xmvis;
1236
1237   /* register ourselves as an extension on this display */
1238   register_with_display(dpy);
1239
1240   xmvis = choose_visual(dpy, screen, list, GL_FALSE);
1241   if (xmvis) {
1242#if 0
1243      return xmvis->vishandle;
1244#else
1245      /* create a new vishandle - the cached one may be stale */
1246      xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1247      if (xmvis->vishandle) {
1248         memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1249      }
1250      return xmvis->vishandle;
1251#endif
1252   }
1253   else
1254      return NULL;
1255}
1256
1257
1258/**
1259 * Init basic fields of a new fake_glx_context.
1260 */
1261static void
1262init_glx_context(struct fake_glx_context *glxCtx, Display *dpy)
1263{
1264   /* Always return True.  See if anyone's confused... */
1265   GLboolean direct = GL_TRUE;
1266
1267   glxCtx->xmesaContext->direct = direct;
1268   glxCtx->glxContext.isDirect = direct;
1269   glxCtx->glxContext.currentDpy = dpy;
1270   glxCtx->glxContext.xid = (XID) glxCtx;  /* self pointer */
1271
1272   assert((void *) glxCtx == (void *) &(glxCtx->glxContext));
1273}
1274
1275
1276
1277static GLXContext
1278Fake_glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1279                       GLXContext share_list, Bool direct )
1280{
1281   XMesaVisual xmvis;
1282   struct fake_glx_context *glxCtx;
1283   struct fake_glx_context *shareCtx = (struct fake_glx_context *) share_list;
1284
1285   if (!dpy || !visinfo)
1286      return 0;
1287
1288   glxCtx = CALLOC_STRUCT(fake_glx_context);
1289   if (!glxCtx)
1290      return 0;
1291
1292   /* deallocate unused windows/buffers */
1293#if 0
1294   XMesaGarbageCollect();
1295#endif
1296
1297   xmvis = find_glx_visual( dpy, visinfo );
1298   if (!xmvis) {
1299      /* This visual wasn't found with glXChooseVisual() */
1300      xmvis = create_glx_visual( dpy, visinfo );
1301      if (!xmvis) {
1302         /* unusable visual */
1303         free(glxCtx);
1304         return NULL;
1305      }
1306   }
1307
1308   glxCtx->xmesaContext = XMesaCreateContext(xmvis,
1309                                   shareCtx ? shareCtx->xmesaContext : NULL);
1310   if (!glxCtx->xmesaContext) {
1311      free(glxCtx);
1312      return NULL;
1313   }
1314
1315   init_glx_context(glxCtx, dpy);
1316
1317   return (GLXContext) glxCtx;
1318}
1319
1320
1321/* XXX these may have to be removed due to thread-safety issues. */
1322static GLXContext MakeCurrent_PrevContext = 0;
1323static GLXDrawable MakeCurrent_PrevDrawable = 0;
1324static GLXDrawable MakeCurrent_PrevReadable = 0;
1325static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1326static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1327
1328
1329/* GLX 1.3 and later */
1330static Bool
1331Fake_glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1332                            GLXDrawable read, GLXContext ctx )
1333{
1334   struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1335
1336   if (ctx && draw && read) {
1337      XMesaBuffer drawBuffer, readBuffer;
1338      XMesaContext xmctx = glxCtx->xmesaContext;
1339
1340      /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1341      if (ctx == MakeCurrent_PrevContext
1342          && draw == MakeCurrent_PrevDrawable) {
1343         drawBuffer = MakeCurrent_PrevDrawBuffer;
1344      }
1345      else {
1346         drawBuffer = XMesaFindBuffer( dpy, draw );
1347      }
1348      if (!drawBuffer) {
1349         /* drawable must be a new window! */
1350         drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1351         if (!drawBuffer) {
1352            /* Out of memory, or context/drawable depth mismatch */
1353            return False;
1354         }
1355#ifdef FX
1356         FXcreateContext( xmctx->xm_visual, draw, xmctx, drawBuffer );
1357#endif
1358      }
1359
1360      /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1361      if (ctx == MakeCurrent_PrevContext
1362          && read == MakeCurrent_PrevReadable) {
1363         readBuffer = MakeCurrent_PrevReadBuffer;
1364      }
1365      else {
1366         readBuffer = XMesaFindBuffer( dpy, read );
1367      }
1368      if (!readBuffer) {
1369         /* drawable must be a new window! */
1370         readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1371         if (!readBuffer) {
1372            /* Out of memory, or context/drawable depth mismatch */
1373            return False;
1374         }
1375#ifdef FX
1376         FXcreateContext( xmctx->xm_visual, read, xmctx, readBuffer );
1377#endif
1378      }
1379
1380      MakeCurrent_PrevContext = ctx;
1381      MakeCurrent_PrevDrawable = draw;
1382      MakeCurrent_PrevReadable = read;
1383      MakeCurrent_PrevDrawBuffer = drawBuffer;
1384      MakeCurrent_PrevReadBuffer = readBuffer;
1385
1386      /* Now make current! */
1387      if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1388         ((__GLXcontext *) ctx)->currentDpy = dpy;
1389         ((__GLXcontext *) ctx)->currentDrawable = draw;
1390         ((__GLXcontext *) ctx)->currentReadable = read;
1391         return True;
1392      }
1393      else {
1394         return False;
1395      }
1396   }
1397   else if (!ctx && !draw && !read) {
1398      /* release current context w/out assigning new one. */
1399      XMesaMakeCurrent( NULL, NULL );
1400      MakeCurrent_PrevContext = 0;
1401      MakeCurrent_PrevDrawable = 0;
1402      MakeCurrent_PrevReadable = 0;
1403      MakeCurrent_PrevDrawBuffer = 0;
1404      MakeCurrent_PrevReadBuffer = 0;
1405      return True;
1406   }
1407   else {
1408      /* The args must either all be non-zero or all zero.
1409       * This is an error.
1410       */
1411      return False;
1412   }
1413}
1414
1415
1416static Bool
1417Fake_glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1418{
1419   return Fake_glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1420}
1421
1422
1423static GLXPixmap
1424Fake_glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1425{
1426   XMesaVisual v;
1427   XMesaBuffer b;
1428
1429   v = find_glx_visual( dpy, visinfo );
1430   if (!v) {
1431      v = create_glx_visual( dpy, visinfo );
1432      if (!v) {
1433         /* unusable visual */
1434         return 0;
1435      }
1436   }
1437
1438   b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1439   if (!b) {
1440      return 0;
1441   }
1442   return b->frontxrb->pixmap;
1443}
1444
1445
1446/*** GLX_MESA_pixmap_colormap ***/
1447
1448static GLXPixmap
1449Fake_glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1450                             Pixmap pixmap, Colormap cmap )
1451{
1452   XMesaVisual v;
1453   XMesaBuffer b;
1454
1455   v = find_glx_visual( dpy, visinfo );
1456   if (!v) {
1457      v = create_glx_visual( dpy, visinfo );
1458      if (!v) {
1459         /* unusable visual */
1460         return 0;
1461      }
1462   }
1463
1464   b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1465   if (!b) {
1466      return 0;
1467   }
1468   return b->frontxrb->pixmap;
1469}
1470
1471
1472static void
1473Fake_glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1474{
1475   XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1476   if (b) {
1477      XMesaDestroyBuffer(b);
1478   }
1479   else if (_mesa_getenv("MESA_DEBUG")) {
1480      _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1481   }
1482}
1483
1484
1485static void
1486Fake_glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1487                     unsigned long mask )
1488{
1489   struct fake_glx_context *fakeSrc = (struct fake_glx_context *) src;
1490   struct fake_glx_context *fakeDst = (struct fake_glx_context *) dst;
1491   XMesaContext xm_src = fakeSrc->xmesaContext;
1492   XMesaContext xm_dst = fakeDst->xmesaContext;
1493   (void) dpy;
1494   if (MakeCurrent_PrevContext == src) {
1495      _mesa_Flush();
1496   }
1497   _mesa_copy_context( &(xm_src->mesa), &(xm_dst->mesa), (GLuint) mask );
1498}
1499
1500
1501static Bool
1502Fake_glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1503{
1504   int op, ev, err;
1505   /* Mesa's GLX isn't really an X extension but we try to act like one. */
1506   if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1507      ev = err = 0;
1508   if (errorBase)
1509      *errorBase = err;
1510   if (eventBase)
1511      *eventBase = ev;
1512   return True; /* we're faking GLX so always return success */
1513}
1514
1515
1516extern void _kw_ungrab_all( Display *dpy );
1517void _kw_ungrab_all( Display *dpy )
1518{
1519   XUngrabPointer( dpy, CurrentTime );
1520   XUngrabKeyboard( dpy, CurrentTime );
1521}
1522
1523
1524static void
1525Fake_glXDestroyContext( Display *dpy, GLXContext ctx )
1526{
1527   struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1528   (void) dpy;
1529   MakeCurrent_PrevContext = 0;
1530   MakeCurrent_PrevDrawable = 0;
1531   MakeCurrent_PrevReadable = 0;
1532   MakeCurrent_PrevDrawBuffer = 0;
1533   MakeCurrent_PrevReadBuffer = 0;
1534   XMesaDestroyContext( glxCtx->xmesaContext );
1535   XMesaGarbageCollect();
1536   free(glxCtx);
1537}
1538
1539
1540static Bool
1541Fake_glXIsDirect( Display *dpy, GLXContext ctx )
1542{
1543   struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1544   (void) dpy;
1545   return glxCtx->xmesaContext->direct;
1546}
1547
1548
1549
1550static void
1551Fake_glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1552{
1553   XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1554
1555   if (buffer) {
1556      XMesaSwapBuffers(buffer);
1557   }
1558   else if (_mesa_getenv("MESA_DEBUG")) {
1559      _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1560                    (int) drawable);
1561   }
1562}
1563
1564
1565
1566/*** GLX_MESA_copy_sub_buffer ***/
1567
1568static void
1569Fake_glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
1570                           int x, int y, int width, int height )
1571{
1572   XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1573   if (buffer) {
1574      XMesaCopySubBuffer(buffer, x, y, width, height);
1575   }
1576   else if (_mesa_getenv("MESA_DEBUG")) {
1577      _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1578   }
1579}
1580
1581
1582static Bool
1583Fake_glXQueryVersion( Display *dpy, int *maj, int *min )
1584{
1585   (void) dpy;
1586   /* Return GLX version, not Mesa version */
1587   assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1588   *maj = CLIENT_MAJOR_VERSION;
1589   *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1590   return True;
1591}
1592
1593
1594/*
1595 * Query the GLX attributes of the given XVisualInfo.
1596 */
1597static int
1598get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1599{
1600   ASSERT(xmvis);
1601   switch(attrib) {
1602      case GLX_USE_GL:
1603         if (fbconfig)
1604            return GLX_BAD_ATTRIBUTE;
1605         *value = (int) True;
1606	 return 0;
1607      case GLX_BUFFER_SIZE:
1608	 *value = xmvis->visinfo->depth;
1609	 return 0;
1610      case GLX_LEVEL:
1611	 *value = xmvis->mesa_visual.level;
1612	 return 0;
1613      case GLX_RGBA:
1614         if (fbconfig)
1615            return GLX_BAD_ATTRIBUTE;
1616	 if (xmvis->mesa_visual.rgbMode) {
1617	    *value = True;
1618	 }
1619	 else {
1620	    *value = False;
1621	 }
1622	 return 0;
1623      case GLX_DOUBLEBUFFER:
1624	 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1625	 return 0;
1626      case GLX_STEREO:
1627	 *value = (int) xmvis->mesa_visual.stereoMode;
1628	 return 0;
1629      case GLX_AUX_BUFFERS:
1630	 *value = xmvis->mesa_visual.numAuxBuffers;
1631	 return 0;
1632      case GLX_RED_SIZE:
1633         *value = xmvis->mesa_visual.redBits;
1634	 return 0;
1635      case GLX_GREEN_SIZE:
1636         *value = xmvis->mesa_visual.greenBits;
1637	 return 0;
1638      case GLX_BLUE_SIZE:
1639         *value = xmvis->mesa_visual.blueBits;
1640	 return 0;
1641      case GLX_ALPHA_SIZE:
1642         *value = xmvis->mesa_visual.alphaBits;
1643	 return 0;
1644      case GLX_DEPTH_SIZE:
1645         *value = xmvis->mesa_visual.depthBits;
1646	 return 0;
1647      case GLX_STENCIL_SIZE:
1648	 *value = xmvis->mesa_visual.stencilBits;
1649	 return 0;
1650      case GLX_ACCUM_RED_SIZE:
1651	 *value = xmvis->mesa_visual.accumRedBits;
1652	 return 0;
1653      case GLX_ACCUM_GREEN_SIZE:
1654	 *value = xmvis->mesa_visual.accumGreenBits;
1655	 return 0;
1656      case GLX_ACCUM_BLUE_SIZE:
1657	 *value = xmvis->mesa_visual.accumBlueBits;
1658	 return 0;
1659      case GLX_ACCUM_ALPHA_SIZE:
1660         *value = xmvis->mesa_visual.accumAlphaBits;
1661	 return 0;
1662
1663      /*
1664       * GLX_EXT_visual_info extension
1665       */
1666      case GLX_X_VISUAL_TYPE_EXT:
1667         switch (xmvis->visinfo->CLASS) {
1668            case StaticGray:   *value = GLX_STATIC_GRAY_EXT;   return 0;
1669            case GrayScale:    *value = GLX_GRAY_SCALE_EXT;    return 0;
1670            case StaticColor:  *value = GLX_STATIC_GRAY_EXT;   return 0;
1671            case PseudoColor:  *value = GLX_PSEUDO_COLOR_EXT;  return 0;
1672            case TrueColor:    *value = GLX_TRUE_COLOR_EXT;    return 0;
1673            case DirectColor:  *value = GLX_DIRECT_COLOR_EXT;  return 0;
1674         }
1675         return 0;
1676      case GLX_TRANSPARENT_TYPE_EXT:
1677         if (xmvis->mesa_visual.level==0) {
1678            /* normal planes */
1679            *value = GLX_NONE_EXT;
1680         }
1681         else if (xmvis->mesa_visual.level>0) {
1682            /* overlay */
1683            if (xmvis->mesa_visual.rgbMode) {
1684               *value = GLX_TRANSPARENT_RGB_EXT;
1685            }
1686            else {
1687               *value = GLX_TRANSPARENT_INDEX_EXT;
1688            }
1689         }
1690         else if (xmvis->mesa_visual.level<0) {
1691            /* underlay */
1692            *value = GLX_NONE_EXT;
1693         }
1694         return 0;
1695      case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1696         {
1697            int pixel = transparent_pixel( xmvis );
1698            if (pixel>=0) {
1699               *value = pixel;
1700            }
1701            /* else undefined */
1702         }
1703         return 0;
1704      case GLX_TRANSPARENT_RED_VALUE_EXT:
1705         /* undefined */
1706         return 0;
1707      case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1708         /* undefined */
1709         return 0;
1710      case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1711         /* undefined */
1712         return 0;
1713      case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1714         /* undefined */
1715         return 0;
1716
1717      /*
1718       * GLX_EXT_visual_info extension
1719       */
1720      case GLX_VISUAL_CAVEAT_EXT:
1721         /* test for zero, just in case */
1722         if (xmvis->mesa_visual.visualRating > 0)
1723            *value = xmvis->mesa_visual.visualRating;
1724         else
1725            *value = GLX_NONE_EXT;
1726         return 0;
1727
1728      /*
1729       * GLX_ARB_multisample
1730       */
1731      case GLX_SAMPLE_BUFFERS_ARB:
1732         *value = 0;
1733         return 0;
1734      case GLX_SAMPLES_ARB:
1735         *value = 0;
1736         return 0;
1737
1738      /*
1739       * For FBConfigs:
1740       */
1741      case GLX_SCREEN_EXT:
1742         if (!fbconfig)
1743            return GLX_BAD_ATTRIBUTE;
1744         *value = xmvis->visinfo->screen;
1745         break;
1746      case GLX_DRAWABLE_TYPE: /*SGIX too */
1747         if (!fbconfig)
1748            return GLX_BAD_ATTRIBUTE;
1749         *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1750         break;
1751      case GLX_RENDER_TYPE_SGIX:
1752         if (!fbconfig)
1753            return GLX_BAD_ATTRIBUTE;
1754         if (xmvis->mesa_visual.rgbMode)
1755            *value = GLX_RGBA_BIT;
1756         else
1757            *value = GLX_COLOR_INDEX_BIT;
1758         break;
1759      case GLX_X_RENDERABLE_SGIX:
1760         if (!fbconfig)
1761            return GLX_BAD_ATTRIBUTE;
1762         *value = True; /* XXX really? */
1763         break;
1764      case GLX_FBCONFIG_ID_SGIX:
1765         if (!fbconfig)
1766            return GLX_BAD_ATTRIBUTE;
1767         *value = xmvis->visinfo->visualid;
1768         break;
1769      case GLX_MAX_PBUFFER_WIDTH:
1770         if (!fbconfig)
1771            return GLX_BAD_ATTRIBUTE;
1772         /* XXX or MAX_WIDTH? */
1773         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1774         break;
1775      case GLX_MAX_PBUFFER_HEIGHT:
1776         if (!fbconfig)
1777            return GLX_BAD_ATTRIBUTE;
1778         *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1779         break;
1780      case GLX_MAX_PBUFFER_PIXELS:
1781         if (!fbconfig)
1782            return GLX_BAD_ATTRIBUTE;
1783         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1784                  DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1785         break;
1786      case GLX_VISUAL_ID:
1787         if (!fbconfig)
1788            return GLX_BAD_ATTRIBUTE;
1789         *value = xmvis->visinfo->visualid;
1790         break;
1791
1792#ifdef GLX_EXT_texture_from_pixmap
1793      case GLX_BIND_TO_TEXTURE_RGB_EXT:
1794         *value = True; /*XXX*/
1795         break;
1796      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1797         /* XXX review */
1798         *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1799         break;
1800      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1801         *value = True; /*XXX*/
1802         break;
1803      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1804         *value = (GLX_TEXTURE_1D_BIT_EXT |
1805                   GLX_TEXTURE_2D_BIT_EXT |
1806                   GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1807         break;
1808      case GLX_Y_INVERTED_EXT:
1809         *value = True; /*XXX*/
1810         break;
1811#endif
1812
1813      default:
1814	 return GLX_BAD_ATTRIBUTE;
1815   }
1816   return Success;
1817}
1818
1819
1820static int
1821Fake_glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1822                   int attrib, int *value )
1823{
1824   XMesaVisual xmvis;
1825   int k;
1826   if (!dpy || !visinfo)
1827      return GLX_BAD_ATTRIBUTE;
1828
1829   xmvis = find_glx_visual( dpy, visinfo );
1830   if (!xmvis) {
1831      /* this visual wasn't obtained with glXChooseVisual */
1832      xmvis = create_glx_visual( dpy, visinfo );
1833      if (!xmvis) {
1834	 /* this visual can't be used for GL rendering */
1835	 if (attrib==GLX_USE_GL) {
1836	    *value = (int) False;
1837	    return 0;
1838	 }
1839	 else {
1840	    return GLX_BAD_VISUAL;
1841	 }
1842      }
1843   }
1844
1845   k = get_config(xmvis, attrib, value, GL_FALSE);
1846   return k;
1847}
1848
1849
1850static void
1851Fake_glXWaitGL( void )
1852{
1853   XMesaContext xmesa = XMesaGetCurrentContext();
1854   XMesaFlush( xmesa );
1855}
1856
1857
1858
1859static void
1860Fake_glXWaitX( void )
1861{
1862   XMesaContext xmesa = XMesaGetCurrentContext();
1863   XMesaFlush( xmesa );
1864}
1865
1866
1867static const char *
1868get_extensions( void )
1869{
1870#ifdef FX
1871   const char *fx = _mesa_getenv("MESA_GLX_FX");
1872   if (fx && fx[0] != 'd') {
1873      return EXTENSIONS;
1874   }
1875#endif
1876   return EXTENSIONS + 23; /* skip "GLX_MESA_set_3dfx_mode" */
1877}
1878
1879
1880
1881/* GLX 1.1 and later */
1882static const char *
1883Fake_glXQueryExtensionsString( Display *dpy, int screen )
1884{
1885   (void) dpy;
1886   (void) screen;
1887   return get_extensions();
1888}
1889
1890
1891
1892/* GLX 1.1 and later */
1893static const char *
1894Fake_glXQueryServerString( Display *dpy, int screen, int name )
1895{
1896   static char version[1000];
1897   sprintf(version, "%d.%d %s",
1898	   SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, MESA_GLX_VERSION);
1899
1900   (void) dpy;
1901   (void) screen;
1902
1903   switch (name) {
1904      case GLX_EXTENSIONS:
1905         return get_extensions();
1906      case GLX_VENDOR:
1907	 return VENDOR;
1908      case GLX_VERSION:
1909	 return version;
1910      default:
1911         return NULL;
1912   }
1913}
1914
1915
1916
1917/* GLX 1.1 and later */
1918static const char *
1919Fake_glXGetClientString( Display *dpy, int name )
1920{
1921   static char version[1000];
1922   sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1923	   CLIENT_MINOR_VERSION, MESA_GLX_VERSION);
1924
1925   (void) dpy;
1926
1927   switch (name) {
1928      case GLX_EXTENSIONS:
1929         return get_extensions();
1930      case GLX_VENDOR:
1931	 return VENDOR;
1932      case GLX_VERSION:
1933	 return version;
1934      default:
1935         return NULL;
1936   }
1937}
1938
1939
1940
1941/*
1942 * GLX 1.3 and later
1943 */
1944
1945
1946static int
1947Fake_glXGetFBConfigAttrib( Display *dpy, GLXFBConfig config,
1948                           int attribute, int *value )
1949{
1950   XMesaVisual v = (XMesaVisual) config;
1951   (void) dpy;
1952   (void) config;
1953
1954   if (!dpy || !config || !value)
1955      return -1;
1956
1957   return get_config(v, attribute, value, GL_TRUE);
1958}
1959
1960
1961static GLXFBConfig *
1962Fake_glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1963{
1964   XVisualInfo *visuals, visTemplate;
1965   const long visMask = VisualScreenMask;
1966   int i;
1967
1968   /* Get list of all X visuals */
1969   visTemplate.screen = screen;
1970   visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1971   if (*nelements > 0) {
1972      XMesaVisual *results;
1973      results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1974      if (!results) {
1975         *nelements = 0;
1976         return NULL;
1977      }
1978      for (i = 0; i < *nelements; i++) {
1979         results[i] = create_glx_visual(dpy, visuals + i);
1980      }
1981      return (GLXFBConfig *) results;
1982   }
1983   return NULL;
1984}
1985
1986
1987static GLXFBConfig *
1988Fake_glXChooseFBConfig( Display *dpy, int screen,
1989                        const int *attribList, int *nitems )
1990{
1991   XMesaVisual xmvis;
1992
1993   if (!attribList || !attribList[0]) {
1994      /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1995      return Fake_glXGetFBConfigs(dpy, screen, nitems);
1996   }
1997
1998   xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1999   if (xmvis) {
2000      GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
2001      if (!config) {
2002         *nitems = 0;
2003         return NULL;
2004      }
2005      *nitems = 1;
2006      config[0] = (GLXFBConfig) xmvis;
2007      return (GLXFBConfig *) config;
2008   }
2009   else {
2010      *nitems = 0;
2011      return NULL;
2012   }
2013}
2014
2015
2016static XVisualInfo *
2017Fake_glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
2018{
2019   if (dpy && config) {
2020      XMesaVisual xmvis = (XMesaVisual) config;
2021#if 0
2022      return xmvis->vishandle;
2023#else
2024      /* create a new vishandle - the cached one may be stale */
2025      xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
2026      if (xmvis->vishandle) {
2027         memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
2028      }
2029      return xmvis->vishandle;
2030#endif
2031   }
2032   else {
2033      return NULL;
2034   }
2035}
2036
2037
2038static GLXWindow
2039Fake_glXCreateWindow( Display *dpy, GLXFBConfig config, Window win,
2040                      const int *attribList )
2041{
2042   XMesaVisual xmvis = (XMesaVisual) config;
2043   XMesaBuffer xmbuf;
2044   if (!xmvis)
2045      return 0;
2046
2047   xmbuf = XMesaCreateWindowBuffer(xmvis, win);
2048   if (!xmbuf)
2049      return 0;
2050
2051#ifdef FX
2052   /* XXX this will segfault if actually called */
2053   FXcreateContext(xmvis, win, NULL, xmbuf);
2054#endif
2055
2056   (void) dpy;
2057   (void) attribList;  /* Ignored in GLX 1.3 */
2058
2059   return win;  /* A hack for now */
2060}
2061
2062
2063static void
2064Fake_glXDestroyWindow( Display *dpy, GLXWindow window )
2065{
2066   XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable) window);
2067   if (b)
2068      XMesaDestroyBuffer(b);
2069   /* don't destroy X window */
2070}
2071
2072
2073/* XXX untested */
2074static GLXPixmap
2075Fake_glXCreatePixmap( Display *dpy, GLXFBConfig config, Pixmap pixmap,
2076                      const int *attribList )
2077{
2078   XMesaVisual v = (XMesaVisual) config;
2079   XMesaBuffer b;
2080   const int *attr;
2081   int target = 0, format = 0, mipmap = 0;
2082   int value;
2083
2084   if (!dpy || !config || !pixmap)
2085      return 0;
2086
2087   for (attr = attribList; attr && *attr; attr++) {
2088      switch (*attr) {
2089      case GLX_TEXTURE_FORMAT_EXT:
2090         attr++;
2091         switch (*attr) {
2092         case GLX_TEXTURE_FORMAT_NONE_EXT:
2093         case GLX_TEXTURE_FORMAT_RGB_EXT:
2094         case GLX_TEXTURE_FORMAT_RGBA_EXT:
2095            format = *attr;
2096            break;
2097         default:
2098            /* error */
2099            return 0;
2100         }
2101         break;
2102      case GLX_TEXTURE_TARGET_EXT:
2103         attr++;
2104         switch (*attr) {
2105         case GLX_TEXTURE_1D_EXT:
2106         case GLX_TEXTURE_2D_EXT:
2107         case GLX_TEXTURE_RECTANGLE_EXT:
2108            target = *attr;
2109            break;
2110         default:
2111            /* error */
2112            return 0;
2113         }
2114         break;
2115      case GLX_MIPMAP_TEXTURE_EXT:
2116         attr++;
2117         if (*attr)
2118            mipmap = 1;
2119         break;
2120      default:
2121         /* error */
2122         return 0;
2123      }
2124   }
2125
2126   if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
2127      if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
2128                     &value, GL_TRUE) != Success
2129          || !value) {
2130         return 0; /* error! */
2131      }
2132   }
2133   else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2134      if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
2135                     &value, GL_TRUE) != Success
2136          || !value) {
2137         return 0; /* error! */
2138      }
2139   }
2140   if (mipmap) {
2141      if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
2142                     &value, GL_TRUE) != Success
2143          || !value) {
2144         return 0; /* error! */
2145      }
2146   }
2147   if (target == GLX_TEXTURE_1D_EXT) {
2148      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
2149                     &value, GL_TRUE) != Success
2150          || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
2151         return 0; /* error! */
2152      }
2153   }
2154   else if (target == GLX_TEXTURE_2D_EXT) {
2155      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
2156                     &value, GL_TRUE) != Success
2157          || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
2158         return 0; /* error! */
2159      }
2160   }
2161   if (target == GLX_TEXTURE_RECTANGLE_EXT) {
2162      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
2163                     &value, GL_TRUE) != Success
2164          || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
2165         return 0; /* error! */
2166      }
2167   }
2168
2169   if (format || target || mipmap) {
2170      /* texture from pixmap */
2171      b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
2172   }
2173   else {
2174      b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
2175   }
2176   if (!b) {
2177      return 0;
2178   }
2179
2180   return pixmap;
2181}
2182
2183
2184static void
2185Fake_glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
2186{
2187   XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable)pixmap);
2188   if (b)
2189      XMesaDestroyBuffer(b);
2190   /* don't destroy X pixmap */
2191}
2192
2193
2194static GLXPbuffer
2195Fake_glXCreatePbuffer( Display *dpy, GLXFBConfig config,
2196                       const int *attribList )
2197{
2198   XMesaVisual xmvis = (XMesaVisual) config;
2199   XMesaBuffer xmbuf;
2200   const int *attrib;
2201   int width = 0, height = 0;
2202   GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2203
2204   (void) dpy;
2205
2206   for (attrib = attribList; *attrib; attrib++) {
2207      switch (*attrib) {
2208         case GLX_PBUFFER_WIDTH:
2209            attrib++;
2210            width = *attrib;
2211            break;
2212         case GLX_PBUFFER_HEIGHT:
2213            attrib++;
2214            height = *attrib;
2215            break;
2216         case GLX_PRESERVED_CONTENTS:
2217            attrib++;
2218            preserveContents = *attrib;
2219            break;
2220         case GLX_LARGEST_PBUFFER:
2221            attrib++;
2222            useLargest = *attrib;
2223            break;
2224         default:
2225            return 0;
2226      }
2227   }
2228
2229   if (width == 0 || height == 0)
2230      return 0;
2231
2232   if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2233      /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2234       * allocate the largest possible buffer.
2235       */
2236      if (useLargest) {
2237         width = MAX_WIDTH;
2238         height = MAX_HEIGHT;
2239      }
2240   }
2241
2242   xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2243   /* A GLXPbuffer handle must be an X Drawable because that's what
2244    * glXMakeCurrent takes.
2245    */
2246   if (xmbuf) {
2247      xmbuf->largestPbuffer = useLargest;
2248      xmbuf->preservedContents = preserveContents;
2249      return (GLXPbuffer) xmbuf->frontxrb->pixmap;
2250   }
2251   else {
2252      return 0;
2253   }
2254}
2255
2256
2257static void
2258Fake_glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2259{
2260   XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2261   if (b) {
2262      XMesaDestroyBuffer(b);
2263   }
2264}
2265
2266
2267static void
2268Fake_glXQueryDrawable( Display *dpy, GLXDrawable draw, int attribute,
2269                       unsigned int *value )
2270{
2271   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2272   if (!xmbuf)
2273      return;
2274
2275   /* make sure buffer's dimensions are up to date */
2276   xmesa_check_and_update_buffer_size(NULL, xmbuf);
2277
2278   switch (attribute) {
2279      case GLX_WIDTH:
2280         *value = xmbuf->mesa_buffer.Width;
2281         break;
2282      case GLX_HEIGHT:
2283         *value = xmbuf->mesa_buffer.Height;
2284         break;
2285      case GLX_PRESERVED_CONTENTS:
2286         *value = xmbuf->preservedContents;
2287         break;
2288      case GLX_LARGEST_PBUFFER:
2289         *value = xmbuf->largestPbuffer;
2290         break;
2291      case GLX_FBCONFIG_ID:
2292         *value = xmbuf->xm_visual->visinfo->visualid;
2293         return;
2294#ifdef GLX_EXT_texture_from_pixmap
2295      case GLX_TEXTURE_FORMAT_EXT:
2296         *value = xmbuf->TextureFormat;
2297         break;
2298      case GLX_TEXTURE_TARGET_EXT:
2299         *value = xmbuf->TextureTarget;
2300         break;
2301      case GLX_MIPMAP_TEXTURE_EXT:
2302         *value = xmbuf->TextureMipmap;
2303         break;
2304#endif
2305
2306      default:
2307         return; /* raise BadValue error */
2308   }
2309}
2310
2311
2312static GLXContext
2313Fake_glXCreateNewContext( Display *dpy, GLXFBConfig config,
2314                          int renderType, GLXContext shareList, Bool direct )
2315{
2316   struct fake_glx_context *glxCtx;
2317   struct fake_glx_context *shareCtx = (struct fake_glx_context *) shareList;
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   glxCtx = CALLOC_STRUCT(fake_glx_context);
2325   if (!glxCtx)
2326      return 0;
2327
2328   /* deallocate unused windows/buffers */
2329   XMesaGarbageCollect();
2330
2331   glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2332                                   shareCtx ? shareCtx->xmesaContext : NULL);
2333   if (!glxCtx->xmesaContext) {
2334      free(glxCtx);
2335      return NULL;
2336   }
2337
2338   init_glx_context(glxCtx, dpy);
2339
2340   return (GLXContext) glxCtx;
2341}
2342
2343
2344static int
2345Fake_glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2346{
2347   struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
2348   XMesaContext xmctx = glxCtx->xmesaContext;
2349
2350   (void) dpy;
2351   (void) ctx;
2352
2353   switch (attribute) {
2354   case GLX_FBCONFIG_ID:
2355      *value = xmctx->xm_visual->visinfo->visualid;
2356      break;
2357   case GLX_RENDER_TYPE:
2358      *value = GLX_RGBA_TYPE;
2359      break;
2360   case GLX_SCREEN:
2361      *value = 0;
2362      return Success;
2363   default:
2364      return GLX_BAD_ATTRIBUTE;
2365   }
2366   return 0;
2367}
2368
2369
2370static void
2371Fake_glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2372{
2373   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2374   if (xmbuf)
2375      xmbuf->selectedEvents = mask;
2376}
2377
2378
2379static void
2380Fake_glXGetSelectedEvent( Display *dpy, GLXDrawable drawable,
2381                          unsigned long *mask )
2382{
2383   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2384   if (xmbuf)
2385      *mask = xmbuf->selectedEvents;
2386   else
2387      *mask = 0;
2388}
2389
2390
2391
2392/*** GLX_SGI_swap_control ***/
2393
2394static int
2395Fake_glXSwapIntervalSGI(int interval)
2396{
2397   (void) interval;
2398   return 0;
2399}
2400
2401
2402
2403/*** GLX_SGI_video_sync ***/
2404
2405static unsigned int FrameCounter = 0;
2406
2407static int
2408Fake_glXGetVideoSyncSGI(unsigned int *count)
2409{
2410   /* this is a bogus implementation */
2411   *count = FrameCounter++;
2412   return 0;
2413}
2414
2415static int
2416Fake_glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2417{
2418   if (divisor <= 0 || remainder < 0)
2419      return GLX_BAD_VALUE;
2420   /* this is a bogus implementation */
2421   FrameCounter++;
2422   while (FrameCounter % divisor != remainder)
2423      FrameCounter++;
2424   *count = FrameCounter;
2425   return 0;
2426}
2427
2428
2429
2430/*** GLX_SGI_make_current_read ***/
2431
2432static Bool
2433Fake_glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
2434{
2435   return Fake_glXMakeContextCurrent( dpy, draw, read, ctx );
2436}
2437
2438/* not used
2439static GLXDrawable
2440Fake_glXGetCurrentReadDrawableSGI(void)
2441{
2442   return 0;
2443}
2444*/
2445
2446
2447/*** GLX_SGIX_video_source ***/
2448#if defined(_VL_H)
2449
2450static GLXVideoSourceSGIX
2451Fake_glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode)
2452{
2453   (void) dpy;
2454   (void) screen;
2455   (void) server;
2456   (void) path;
2457   (void) nodeClass;
2458   (void) drainNode;
2459   return 0;
2460}
2461
2462static void
2463Fake_glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2464{
2465   (void) dpy;
2466   (void) src;
2467}
2468
2469#endif
2470
2471
2472/*** GLX_EXT_import_context ***/
2473
2474static void
2475Fake_glXFreeContextEXT(Display *dpy, GLXContext context)
2476{
2477   (void) dpy;
2478   (void) context;
2479}
2480
2481static GLXContextID
2482Fake_glXGetContextIDEXT(const GLXContext context)
2483{
2484   (void) context;
2485   return 0;
2486}
2487
2488static GLXContext
2489Fake_glXImportContextEXT(Display *dpy, GLXContextID contextID)
2490{
2491   (void) dpy;
2492   (void) contextID;
2493   return 0;
2494}
2495
2496static int
2497Fake_glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute, int *value)
2498{
2499   (void) dpy;
2500   (void) context;
2501   (void) attribute;
2502   (void) value;
2503   return 0;
2504}
2505
2506
2507
2508/*** GLX_SGIX_fbconfig ***/
2509
2510static int
2511Fake_glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
2512{
2513   return Fake_glXGetFBConfigAttrib(dpy, config, attribute, value);
2514}
2515
2516static GLXFBConfigSGIX *
2517Fake_glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list, int *nelements)
2518{
2519   return (GLXFBConfig *) Fake_glXChooseFBConfig(dpy, screen, attrib_list, nelements);
2520}
2521
2522
2523static GLXPixmap
2524Fake_glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap)
2525{
2526   XMesaVisual xmvis = (XMesaVisual) config;
2527   XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2528   return xmbuf->frontxrb->pixmap; /* need to return an X ID */
2529}
2530
2531
2532static GLXContext
2533Fake_glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct)
2534{
2535   XMesaVisual xmvis = (XMesaVisual) config;
2536   struct fake_glx_context *glxCtx;
2537   struct fake_glx_context *shareCtx = (struct fake_glx_context *) share_list;
2538
2539   glxCtx = CALLOC_STRUCT(fake_glx_context);
2540   if (!glxCtx)
2541      return 0;
2542
2543   /* deallocate unused windows/buffers */
2544   XMesaGarbageCollect();
2545
2546   glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2547                                   shareCtx ? shareCtx->xmesaContext : NULL);
2548   if (!glxCtx->xmesaContext) {
2549      free(glxCtx);
2550      return NULL;
2551   }
2552
2553   init_glx_context(glxCtx, dpy);
2554
2555   return (GLXContext) glxCtx;
2556}
2557
2558
2559static XVisualInfo *
2560Fake_glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2561{
2562   return Fake_glXGetVisualFromFBConfig(dpy, config);
2563}
2564
2565
2566static GLXFBConfigSGIX
2567Fake_glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2568{
2569   XMesaVisual xmvis = find_glx_visual(dpy, vis);
2570   if (!xmvis) {
2571      /* This visual wasn't found with glXChooseVisual() */
2572      xmvis = create_glx_visual(dpy, vis);
2573   }
2574
2575   return (GLXFBConfigSGIX) xmvis;
2576}
2577
2578
2579
2580/*** GLX_SGIX_pbuffer ***/
2581
2582static GLXPbufferSGIX
2583Fake_glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2584                             unsigned int width, unsigned int height,
2585                             int *attribList)
2586{
2587   XMesaVisual xmvis = (XMesaVisual) config;
2588   XMesaBuffer xmbuf;
2589   const int *attrib;
2590   GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2591
2592   (void) dpy;
2593
2594   for (attrib = attribList; attrib && *attrib; attrib++) {
2595      switch (*attrib) {
2596         case GLX_PRESERVED_CONTENTS_SGIX:
2597            attrib++;
2598            preserveContents = *attrib; /* ignored */
2599            break;
2600         case GLX_LARGEST_PBUFFER_SGIX:
2601            attrib++;
2602            useLargest = *attrib; /* ignored */
2603            break;
2604         default:
2605            return 0;
2606      }
2607   }
2608
2609   /* not used at this time */
2610   (void) useLargest;
2611   (void) preserveContents;
2612
2613   xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2614   /* A GLXPbuffer handle must be an X Drawable because that's what
2615    * glXMakeCurrent takes.
2616    */
2617   return (GLXPbuffer) xmbuf->frontxrb->pixmap;
2618}
2619
2620
2621static void
2622Fake_glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2623{
2624   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2625   if (xmbuf) {
2626      XMesaDestroyBuffer(xmbuf);
2627   }
2628}
2629
2630
2631static int
2632Fake_glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value)
2633{
2634   const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2635
2636   if (!xmbuf) {
2637      /* Generate GLXBadPbufferSGIX for bad pbuffer */
2638      return 0;
2639   }
2640
2641   switch (attribute) {
2642      case GLX_PRESERVED_CONTENTS_SGIX:
2643         *value = xmbuf->preservedContents;
2644         break;
2645      case GLX_LARGEST_PBUFFER_SGIX:
2646         *value = xmbuf->largestPbuffer;
2647         break;
2648      case GLX_WIDTH_SGIX:
2649         *value = xmbuf->mesa_buffer.Width;
2650         break;
2651      case GLX_HEIGHT_SGIX:
2652         *value = xmbuf->mesa_buffer.Height;
2653         break;
2654      case GLX_EVENT_MASK_SGIX:
2655         *value = 0;  /* XXX might be wrong */
2656         break;
2657      default:
2658         *value = 0;
2659   }
2660   return 0;
2661}
2662
2663
2664static void
2665Fake_glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2666{
2667   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2668   if (xmbuf) {
2669      /* Note: we'll never generate clobber events */
2670      xmbuf->selectedEvents = mask;
2671   }
2672}
2673
2674
2675static void
2676Fake_glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2677{
2678   XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2679   if (xmbuf) {
2680      *mask = xmbuf->selectedEvents;
2681   }
2682   else {
2683      *mask = 0;
2684   }
2685}
2686
2687
2688
2689/*** GLX_SGI_cushion ***/
2690
2691static void
2692Fake_glXCushionSGI(Display *dpy, Window win, float cushion)
2693{
2694   (void) dpy;
2695   (void) win;
2696   (void) cushion;
2697}
2698
2699
2700
2701/*** GLX_SGIX_video_resize ***/
2702
2703static int
2704Fake_glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel , Window window)
2705{
2706   (void) dpy;
2707   (void) screen;
2708   (void) channel;
2709   (void) window;
2710   return 0;
2711}
2712
2713static int
2714Fake_glXChannelRectSGIX(Display *dpy, int screen, int channel, int x, int y, int w, int h)
2715{
2716   (void) dpy;
2717   (void) screen;
2718   (void) channel;
2719   (void) x;
2720   (void) y;
2721   (void) w;
2722   (void) h;
2723   return 0;
2724}
2725
2726static int
2727Fake_glXQueryChannelRectSGIX(Display *dpy, int screen, int channel, int *x, int *y, int *w, int *h)
2728{
2729   (void) dpy;
2730   (void) screen;
2731   (void) channel;
2732   (void) x;
2733   (void) y;
2734   (void) w;
2735   (void) h;
2736   return 0;
2737}
2738
2739static int
2740Fake_glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel, int *dx, int *dy, int *dw, int *dh)
2741{
2742   (void) dpy;
2743   (void) screen;
2744   (void) channel;
2745   (void) dx;
2746   (void) dy;
2747   (void) dw;
2748   (void) dh;
2749   return 0;
2750}
2751
2752static int
2753Fake_glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2754{
2755   (void) dpy;
2756   (void) screen;
2757   (void) channel;
2758   (void) synctype;
2759   return 0;
2760}
2761
2762
2763
2764/*** GLX_SGIX_dmbuffer **/
2765
2766#if defined(_DM_BUFFER_H_)
2767static Bool
2768Fake_glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer)
2769{
2770   (void) dpy;
2771   (void) pbuffer;
2772   (void) params;
2773   (void) dmbuffer;
2774   return False;
2775}
2776#endif
2777
2778
2779/*** GLX_SGIX_swap_group ***/
2780
2781static void
2782Fake_glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2783{
2784   (void) dpy;
2785   (void) drawable;
2786   (void) member;
2787}
2788
2789
2790
2791/*** GLX_SGIX_swap_barrier ***/
2792
2793static void
2794Fake_glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2795{
2796   (void) dpy;
2797   (void) drawable;
2798   (void) barrier;
2799}
2800
2801static Bool
2802Fake_glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2803{
2804   (void) dpy;
2805   (void) screen;
2806   (void) max;
2807   return False;
2808}
2809
2810
2811
2812/*** GLX_SUN_get_transparent_index ***/
2813
2814static Status
2815Fake_glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay, long *pTransparent)
2816{
2817   (void) dpy;
2818   (void) overlay;
2819   (void) underlay;
2820   (void) pTransparent;
2821   return 0;
2822}
2823
2824
2825
2826/*** GLX_MESA_release_buffers ***/
2827
2828/*
2829 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2830 * (a window or pixmap) prior to destroying the GLXDrawable.
2831 */
2832static Bool
2833Fake_glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2834{
2835   XMesaBuffer b = XMesaFindBuffer(dpy, d);
2836   if (b) {
2837      XMesaDestroyBuffer(b);
2838      return True;
2839   }
2840   return False;
2841}
2842
2843
2844
2845/*** GLX_MESA_set_3dfx_mode ***/
2846
2847static Bool
2848Fake_glXSet3DfxModeMESA( int mode )
2849{
2850   return XMesaSetFXmode( mode );
2851}
2852
2853
2854
2855/*** GLX_NV_vertex_array range ***/
2856static void *
2857Fake_glXAllocateMemoryNV( GLsizei size,
2858                          GLfloat readFrequency,
2859                          GLfloat writeFrequency,
2860                          GLfloat priority )
2861{
2862   (void) size;
2863   (void) readFrequency;
2864   (void) writeFrequency;
2865   (void) priority;
2866   return NULL;
2867}
2868
2869
2870static void
2871Fake_glXFreeMemoryNV( GLvoid *pointer )
2872{
2873   (void) pointer;
2874}
2875
2876
2877/*** GLX_MESA_agp_offset ***/
2878
2879static GLuint
2880Fake_glXGetAGPOffsetMESA( const GLvoid *pointer )
2881{
2882   (void) pointer;
2883   return ~0;
2884}
2885
2886
2887/*** GLX_EXT_texture_from_pixmap ***/
2888
2889static void
2890Fake_glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2891                        const int *attrib_list)
2892{
2893   XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2894   if (b)
2895      XMesaBindTexImage(dpy, b, buffer, attrib_list);
2896}
2897
2898static void
2899Fake_glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2900{
2901   XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2902   if (b)
2903      XMesaReleaseTexImage(dpy, b, buffer);
2904}
2905
2906
2907/* silence warning */
2908extern struct _glxapi_table *_mesa_GetGLXDispatchTable(void);
2909
2910
2911/**
2912 * Create a new GLX API dispatch table with its function pointers
2913 * initialized to point to Mesa's "fake" GLX API functions.
2914 * Note: there's a similar function (_real_GetGLXDispatchTable) that
2915 * returns a new dispatch table with all pointers initalized to point
2916 * to "real" GLX functions (which understand GLX wire protocol, etc).
2917 */
2918struct _glxapi_table *
2919_mesa_GetGLXDispatchTable(void)
2920{
2921   static struct _glxapi_table glx;
2922
2923   /* be sure our dispatch table size <= libGL's table */
2924   {
2925      GLuint size = sizeof(struct _glxapi_table) / sizeof(void *);
2926      (void) size;
2927      assert(_glxapi_get_dispatch_table_size() >= size);
2928   }
2929
2930   /* initialize the whole table to no-ops */
2931   _glxapi_set_no_op_table(&glx);
2932
2933   /* now initialize the table with the functions I implement */
2934   glx.ChooseVisual = Fake_glXChooseVisual;
2935   glx.CopyContext = Fake_glXCopyContext;
2936   glx.CreateContext = Fake_glXCreateContext;
2937   glx.CreateGLXPixmap = Fake_glXCreateGLXPixmap;
2938   glx.DestroyContext = Fake_glXDestroyContext;
2939   glx.DestroyGLXPixmap = Fake_glXDestroyGLXPixmap;
2940   glx.GetConfig = Fake_glXGetConfig;
2941   /*glx.GetCurrentContext = Fake_glXGetCurrentContext;*/
2942   /*glx.GetCurrentDrawable = Fake_glXGetCurrentDrawable;*/
2943   glx.IsDirect = Fake_glXIsDirect;
2944   glx.MakeCurrent = Fake_glXMakeCurrent;
2945   glx.QueryExtension = Fake_glXQueryExtension;
2946   glx.QueryVersion = Fake_glXQueryVersion;
2947   glx.SwapBuffers = Fake_glXSwapBuffers;
2948   glx.UseXFont = Fake_glXUseXFont;
2949   glx.WaitGL = Fake_glXWaitGL;
2950   glx.WaitX = Fake_glXWaitX;
2951
2952   /*** GLX_VERSION_1_1 ***/
2953   glx.GetClientString = Fake_glXGetClientString;
2954   glx.QueryExtensionsString = Fake_glXQueryExtensionsString;
2955   glx.QueryServerString = Fake_glXQueryServerString;
2956
2957   /*** GLX_VERSION_1_2 ***/
2958   /*glx.GetCurrentDisplay = Fake_glXGetCurrentDisplay;*/
2959
2960   /*** GLX_VERSION_1_3 ***/
2961   glx.ChooseFBConfig = Fake_glXChooseFBConfig;
2962   glx.CreateNewContext = Fake_glXCreateNewContext;
2963   glx.CreatePbuffer = Fake_glXCreatePbuffer;
2964   glx.CreatePixmap = Fake_glXCreatePixmap;
2965   glx.CreateWindow = Fake_glXCreateWindow;
2966   glx.DestroyPbuffer = Fake_glXDestroyPbuffer;
2967   glx.DestroyPixmap = Fake_glXDestroyPixmap;
2968   glx.DestroyWindow = Fake_glXDestroyWindow;
2969   /*glx.GetCurrentReadDrawable = Fake_glXGetCurrentReadDrawable;*/
2970   glx.GetFBConfigAttrib = Fake_glXGetFBConfigAttrib;
2971   glx.GetFBConfigs = Fake_glXGetFBConfigs;
2972   glx.GetSelectedEvent = Fake_glXGetSelectedEvent;
2973   glx.GetVisualFromFBConfig = Fake_glXGetVisualFromFBConfig;
2974   glx.MakeContextCurrent = Fake_glXMakeContextCurrent;
2975   glx.QueryContext = Fake_glXQueryContext;
2976   glx.QueryDrawable = Fake_glXQueryDrawable;
2977   glx.SelectEvent = Fake_glXSelectEvent;
2978
2979   /*** GLX_SGI_swap_control ***/
2980   glx.SwapIntervalSGI = Fake_glXSwapIntervalSGI;
2981
2982   /*** GLX_SGI_video_sync ***/
2983   glx.GetVideoSyncSGI = Fake_glXGetVideoSyncSGI;
2984   glx.WaitVideoSyncSGI = Fake_glXWaitVideoSyncSGI;
2985
2986   /*** GLX_SGI_make_current_read ***/
2987   glx.MakeCurrentReadSGI = Fake_glXMakeCurrentReadSGI;
2988   /*glx.GetCurrentReadDrawableSGI = Fake_glXGetCurrentReadDrawableSGI;*/
2989
2990/*** GLX_SGIX_video_source ***/
2991#if defined(_VL_H)
2992   glx.CreateGLXVideoSourceSGIX = Fake_glXCreateGLXVideoSourceSGIX;
2993   glx.DestroyGLXVideoSourceSGIX = Fake_glXDestroyGLXVideoSourceSGIX;
2994#endif
2995
2996   /*** GLX_EXT_import_context ***/
2997   glx.FreeContextEXT = Fake_glXFreeContextEXT;
2998   glx.GetContextIDEXT = Fake_glXGetContextIDEXT;
2999   /*glx.GetCurrentDisplayEXT = Fake_glXGetCurrentDisplayEXT;*/
3000   glx.ImportContextEXT = Fake_glXImportContextEXT;
3001   glx.QueryContextInfoEXT = Fake_glXQueryContextInfoEXT;
3002
3003   /*** GLX_SGIX_fbconfig ***/
3004   glx.GetFBConfigAttribSGIX = Fake_glXGetFBConfigAttribSGIX;
3005   glx.ChooseFBConfigSGIX = Fake_glXChooseFBConfigSGIX;
3006   glx.CreateGLXPixmapWithConfigSGIX = Fake_glXCreateGLXPixmapWithConfigSGIX;
3007   glx.CreateContextWithConfigSGIX = Fake_glXCreateContextWithConfigSGIX;
3008   glx.GetVisualFromFBConfigSGIX = Fake_glXGetVisualFromFBConfigSGIX;
3009   glx.GetFBConfigFromVisualSGIX = Fake_glXGetFBConfigFromVisualSGIX;
3010
3011   /*** GLX_SGIX_pbuffer ***/
3012   glx.CreateGLXPbufferSGIX = Fake_glXCreateGLXPbufferSGIX;
3013   glx.DestroyGLXPbufferSGIX = Fake_glXDestroyGLXPbufferSGIX;
3014   glx.QueryGLXPbufferSGIX = Fake_glXQueryGLXPbufferSGIX;
3015   glx.SelectEventSGIX = Fake_glXSelectEventSGIX;
3016   glx.GetSelectedEventSGIX = Fake_glXGetSelectedEventSGIX;
3017
3018   /*** GLX_SGI_cushion ***/
3019   glx.CushionSGI = Fake_glXCushionSGI;
3020
3021   /*** GLX_SGIX_video_resize ***/
3022   glx.BindChannelToWindowSGIX = Fake_glXBindChannelToWindowSGIX;
3023   glx.ChannelRectSGIX = Fake_glXChannelRectSGIX;
3024   glx.QueryChannelRectSGIX = Fake_glXQueryChannelRectSGIX;
3025   glx.QueryChannelDeltasSGIX = Fake_glXQueryChannelDeltasSGIX;
3026   glx.ChannelRectSyncSGIX = Fake_glXChannelRectSyncSGIX;
3027
3028   /*** GLX_SGIX_dmbuffer **/
3029#if defined(_DM_BUFFER_H_)
3030   glx.AssociateDMPbufferSGIX = NULL;
3031#endif
3032
3033   /*** GLX_SGIX_swap_group ***/
3034   glx.JoinSwapGroupSGIX = Fake_glXJoinSwapGroupSGIX;
3035
3036   /*** GLX_SGIX_swap_barrier ***/
3037   glx.BindSwapBarrierSGIX = Fake_glXBindSwapBarrierSGIX;
3038   glx.QueryMaxSwapBarriersSGIX = Fake_glXQueryMaxSwapBarriersSGIX;
3039
3040   /*** GLX_SUN_get_transparent_index ***/
3041   glx.GetTransparentIndexSUN = Fake_glXGetTransparentIndexSUN;
3042
3043   /*** GLX_MESA_copy_sub_buffer ***/
3044   glx.CopySubBufferMESA = Fake_glXCopySubBufferMESA;
3045
3046   /*** GLX_MESA_release_buffers ***/
3047   glx.ReleaseBuffersMESA = Fake_glXReleaseBuffersMESA;
3048
3049   /*** GLX_MESA_pixmap_colormap ***/
3050   glx.CreateGLXPixmapMESA = Fake_glXCreateGLXPixmapMESA;
3051
3052   /*** GLX_MESA_set_3dfx_mode ***/
3053   glx.Set3DfxModeMESA = Fake_glXSet3DfxModeMESA;
3054
3055   /*** GLX_NV_vertex_array_range ***/
3056   glx.AllocateMemoryNV = Fake_glXAllocateMemoryNV;
3057   glx.FreeMemoryNV = Fake_glXFreeMemoryNV;
3058
3059   /*** GLX_MESA_agp_offset ***/
3060   glx.GetAGPOffsetMESA = Fake_glXGetAGPOffsetMESA;
3061
3062   /*** GLX_EXT_texture_from_pixmap ***/
3063   glx.BindTexImageEXT = Fake_glXBindTexImageEXT;
3064   glx.ReleaseTexImageEXT = Fake_glXReleaseTexImageEXT;
3065
3066   return &glx;
3067}
3068