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[mesa.git] / src / mesa / drivers / x11 / fakeglx.c
1 /* $Id: fakeglx.c,v 1.75 2002/11/10 17:07:06 brianp Exp $ */
2
3 /*
4 * Mesa 3-D graphics library
5 * Version: 5.0
6 *
7 * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 /*
29 * This is an emulation of the GLX API which allows Mesa/GLX-based programs
30 * to run on X servers which do not have the real GLX extension.
31 *
32 * Thanks to the contributors:
33 *
34 * Initial version: Philip Brown (phil@bolthole.com)
35 * Better glXGetConfig() support: Armin Liebchen (liebchen@asylum.cs.utah.edu)
36 * Further visual-handling refinements: Wolfram Gloger
37 * (wmglo@Dent.MED.Uni-Muenchen.DE).
38 *
39 * Notes:
40 * Don't be fooled, stereo isn't supported yet.
41 */
42
43
44
45 #include "glxheader.h"
46 #include "glxapi.h"
47 #include "GL/xmesa.h"
48 #include "context.h"
49 #include "config.h"
50 #include "macros.h"
51 #include "imports.h"
52 #include "mmath.h"
53 #include "mtypes.h"
54 #include "xfonts.h"
55 #include "xmesaP.h"
56
57
58 /* This indicates the client-side GLX API and GLX encoder version. */
59 #define CLIENT_MAJOR_VERSION 1
60 #define CLIENT_MINOR_VERSION 4 /* but don't have 1.3's pbuffers, etc yet */
61
62 /* This indicates the server-side GLX decoder version.
63 * GLX 1.4 indicates OpenGL 1.3 support
64 */
65 #define SERVER_MAJOR_VERSION 1
66 #define SERVER_MINOR_VERSION 4
67
68 /* This is appended onto the glXGetClient/ServerString version strings. */
69 #define MESA_GLX_VERSION "Mesa 5.0"
70
71 /* Who implemented this GLX? */
72 #define VENDOR "Brian Paul"
73
74 #define EXTENSIONS \
75 "GLX_MESA_set_3dfx_mode " \
76 "GLX_MESA_copy_sub_buffer " \
77 "GLX_MESA_pixmap_colormap " \
78 "GLX_MESA_release_buffers " \
79 "GLX_ARB_get_proc_address " \
80 "GLX_EXT_visual_info " \
81 "GLX_EXT_visual_rating " \
82 "GLX_SGI_video_sync " \
83 "GLX_SGIX_fbconfig " \
84 "GLX_SGIX_pbuffer"
85
86
87 /* Silence compiler warnings */
88 extern void Fake_glXDummyFunc( void );
89 void Fake_glXDummyFunc( void )
90 {
91 (void) kernel8;
92 (void) DitherValues;
93 (void) HPCR_DRGB;
94 (void) kernel1;
95 }
96
97
98 /*
99 * Our fake GLX context will contain a "real" GLX context and an XMesa context.
100 *
101 * Note that a pointer to a __GLXcontext is a pointer to a fake_glx_context,
102 * and vice versa.
103 *
104 * We really just need this structure in order to make the libGL functions
105 * glXGetCurrentContext(), glXGetCurrentDrawable() and glXGetCurrentDisplay()
106 * work correctly.
107 */
108 struct fake_glx_context {
109 __GLXcontext glxContext; /* this MUST be first! */
110 XMesaContext xmesaContext;
111 };
112
113
114
115 /**********************************************************************/
116 /*** GLX Visual Code ***/
117 /**********************************************************************/
118
119 #define DONT_CARE -1
120
121
122 #define MAX_VISUALS 100
123 static XMesaVisual VisualTable[MAX_VISUALS];
124 static int NumVisuals = 0;
125
126
127 /*
128 * This struct and some code fragments borrowed
129 * from Mark Kilgard's GLUT library.
130 */
131 typedef struct _OverlayInfo {
132 /* Avoid 64-bit portability problems by being careful to use
133 longs due to the way XGetWindowProperty is specified. Note
134 that these parameters are passed as CARD32s over X
135 protocol. */
136 unsigned long overlay_visual;
137 long transparent_type;
138 long value;
139 long layer;
140 } OverlayInfo;
141
142
143
144 /* Macro to handle c_class vs class field name in XVisualInfo struct */
145 #if defined(__cplusplus) || defined(c_plusplus)
146 #define CLASS c_class
147 #else
148 #define CLASS class
149 #endif
150
151
152
153
154 /*
155 * Test if the given XVisualInfo is usable for Mesa rendering.
156 */
157 static GLboolean is_usable_visual( XVisualInfo *vinfo )
158 {
159 switch (vinfo->CLASS) {
160 case StaticGray:
161 case GrayScale:
162 /* Any StaticGray/GrayScale visual works in RGB or CI mode */
163 return GL_TRUE;
164 case StaticColor:
165 case PseudoColor:
166 /* Any StaticColor/PseudoColor visual of at least 4 bits */
167 if (vinfo->depth>=4) {
168 return GL_TRUE;
169 }
170 else {
171 return GL_FALSE;
172 }
173 case TrueColor:
174 case DirectColor:
175 /* Any depth of TrueColor or DirectColor works in RGB mode */
176 return GL_TRUE;
177 default:
178 /* This should never happen */
179 return GL_FALSE;
180 }
181 }
182
183
184
185 /*
186 * Return the level (overlay, normal, underlay) of a given XVisualInfo.
187 * Input: dpy - the X display
188 * vinfo - the XVisualInfo to test
189 * Return: level of the visual:
190 * 0 = normal planes
191 * >0 = overlay planes
192 * <0 = underlay planes
193 */
194 static int level_of_visual( Display *dpy, XVisualInfo *vinfo )
195 {
196 Atom overlayVisualsAtom;
197 OverlayInfo *overlay_info = NULL;
198 int numOverlaysPerScreen;
199 Status status;
200 Atom actualType;
201 int actualFormat;
202 unsigned long sizeData, bytesLeft;
203 int i;
204
205 /*
206 * The SERVER_OVERLAY_VISUALS property on the root window contains
207 * a list of overlay visuals. Get that list now.
208 */
209 overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
210 if (overlayVisualsAtom == None) {
211 return 0;
212 }
213
214 status = XGetWindowProperty(dpy, RootWindow( dpy, vinfo->screen ),
215 overlayVisualsAtom, 0L, (long) 10000, False,
216 overlayVisualsAtom, &actualType, &actualFormat,
217 &sizeData, &bytesLeft,
218 (unsigned char **) &overlay_info );
219
220 if (status != Success || actualType != overlayVisualsAtom ||
221 actualFormat != 32 || sizeData < 4) {
222 /* something went wrong */
223 XFree((void *) overlay_info);
224 return 0;
225 }
226
227 /* search the overlay visual list for the visual ID of interest */
228 numOverlaysPerScreen = (int) (sizeData / 4);
229 for (i=0;i<numOverlaysPerScreen;i++) {
230 OverlayInfo *ov;
231 ov = overlay_info + i;
232 if (ov->overlay_visual==vinfo->visualid) {
233 /* found the visual */
234 if (/*ov->transparent_type==1 &&*/ ov->layer!=0) {
235 int level = ov->layer;
236 XFree((void *) overlay_info);
237 return level;
238 }
239 else {
240 XFree((void *) overlay_info);
241 return 0;
242 }
243 }
244 }
245
246 /* The visual ID was not found in the overlay list. */
247 XFree((void *) overlay_info);
248 return 0;
249 }
250
251
252
253
254 /*
255 * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
256 * configuration in our list of GLX visuals.
257 */
258 static XMesaVisual
259 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
260 GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
261 GLboolean stereoFlag,
262 GLint depth_size, GLint stencil_size,
263 GLint accumRedSize, GLint accumGreenSize,
264 GLint accumBlueSize, GLint accumAlphaSize,
265 GLint level )
266 {
267 GLboolean ximageFlag = GL_TRUE;
268 XMesaVisual xmvis;
269 GLint i;
270 GLboolean comparePointers;
271
272 if (dbFlag) {
273 /* Check if the MESA_BACK_BUFFER env var is set */
274 char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
275 if (backbuffer) {
276 if (backbuffer[0]=='p' || backbuffer[0]=='P') {
277 ximageFlag = GL_FALSE;
278 }
279 else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
280 ximageFlag = GL_TRUE;
281 }
282 else {
283 _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
284 }
285 }
286 }
287
288 /* Comparing IDs uses less memory but sometimes fails. */
289 /* XXX revisit this after 3.0 is finished. */
290 if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
291 comparePointers = GL_TRUE;
292 else
293 comparePointers = GL_FALSE;
294
295 /* First check if a matching visual is already in the list */
296 for (i=0; i<NumVisuals; i++) {
297 XMesaVisual v = VisualTable[i];
298 if (v->display == dpy
299 && v->level == level
300 && v->ximage_flag == ximageFlag
301 && v->mesa_visual.rgbMode == rgbFlag
302 && v->mesa_visual.doubleBufferMode == dbFlag
303 && v->mesa_visual.stereoMode == stereoFlag
304 && (v->mesa_visual.alphaBits > 0) == alphaFlag
305 && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
306 && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
307 && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
308 && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
309 && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
310 && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
311 /* now either compare XVisualInfo pointers or visual IDs */
312 if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
313 || (comparePointers && v->vishandle == vinfo)) {
314 return v;
315 }
316 }
317 }
318
319 /* Create a new visual and add it to the list. */
320
321 if (NumVisuals >= MAX_VISUALS) {
322 _mesa_problem(NULL, "GLX Error: maximum number of visuals exceeded");
323 return NULL;
324 }
325
326 xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
327 stereoFlag, ximageFlag,
328 depth_size, stencil_size,
329 accumRedSize, accumBlueSize,
330 accumBlueSize, accumAlphaSize, 0, level,
331 GLX_NONE_EXT );
332 if (xmvis) {
333 /* Save a copy of the pointer now so we can find this visual again
334 * if we need to search for it in find_glx_visual().
335 */
336 xmvis->vishandle = vinfo;
337 /* add xmvis to the list */
338 VisualTable[NumVisuals] = xmvis;
339 NumVisuals++;
340 }
341 return xmvis;
342 }
343
344
345
346 /*
347 * Create a GLX visual from a regular XVisualInfo.
348 * This is called when Fake GLX is given an XVisualInfo which wasn't
349 * returned by glXChooseVisual. Since this is the first time we're
350 * considering this visual we'll take a guess at reasonable values
351 * for depth buffer size, stencil size, accum size, etc.
352 * This is the best we can do with a client-side emulation of GLX.
353 */
354 static XMesaVisual
355 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
356 {
357 int vislevel;
358
359 vislevel = level_of_visual( dpy, visinfo );
360 if (vislevel) {
361 /* Configure this visual as a CI, single-buffered overlay */
362 return save_glx_visual( dpy, visinfo,
363 GL_FALSE, /* rgb */
364 GL_FALSE, /* alpha */
365 GL_FALSE, /* double */
366 GL_FALSE, /* stereo */
367 0, /* depth bits */
368 0, /* stencil bits */
369 0,0,0,0, /* accum bits */
370 vislevel /* level */
371 );
372 }
373 else if (is_usable_visual( visinfo )) {
374 if (_mesa_getenv("MESA_GLX_FORCE_CI")) {
375 /* Configure this visual as a COLOR INDEX visual. */
376 return save_glx_visual( dpy, visinfo,
377 GL_FALSE, /* rgb */
378 GL_FALSE, /* alpha */
379 GL_TRUE, /* double */
380 GL_FALSE, /* stereo */
381 DEFAULT_SOFTWARE_DEPTH_BITS,
382 8 * sizeof(GLstencil),
383 0 * sizeof(GLaccum), /* r */
384 0 * sizeof(GLaccum), /* g */
385 0 * sizeof(GLaccum), /* b */
386 0 * sizeof(GLaccum), /* a */
387 0 /* level */
388 );
389 }
390 else {
391 /* Configure this visual as RGB, double-buffered, depth-buffered. */
392 /* This is surely wrong for some people's needs but what else */
393 /* can be done? They should use glXChooseVisual(). */
394 return save_glx_visual( dpy, visinfo,
395 GL_TRUE, /* rgb */
396 GL_FALSE, /* alpha */
397 GL_TRUE, /* double */
398 GL_FALSE, /* stereo */
399 DEFAULT_SOFTWARE_DEPTH_BITS,
400 8 * sizeof(GLstencil),
401 8 * sizeof(GLaccum), /* r */
402 8 * sizeof(GLaccum), /* g */
403 8 * sizeof(GLaccum), /* b */
404 8 * sizeof(GLaccum), /* a */
405 0 /* level */
406 );
407 }
408 }
409 else {
410 _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
411 return NULL;
412 }
413 }
414
415
416
417 /*
418 * Find the GLX visual associated with an XVisualInfo.
419 */
420 static XMesaVisual
421 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
422 {
423 int i;
424
425 /* try to match visual id */
426 for (i=0;i<NumVisuals;i++) {
427 if (VisualTable[i]->display==dpy
428 && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
429 return VisualTable[i];
430 }
431 }
432
433 /* if that fails, try to match pointers */
434 for (i=0;i<NumVisuals;i++) {
435 if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
436 return VisualTable[i];
437 }
438 }
439
440 return NULL;
441 }
442
443
444
445 /*
446 * Return the transparent pixel value for a GLX visual.
447 * Input: glxvis - the glx_visual
448 * Return: a pixel value or -1 if no transparent pixel
449 */
450 static int transparent_pixel( XMesaVisual glxvis )
451 {
452 Display *dpy = glxvis->display;
453 XVisualInfo *vinfo = glxvis->visinfo;
454 Atom overlayVisualsAtom;
455 OverlayInfo *overlay_info = NULL;
456 int numOverlaysPerScreen;
457 Status status;
458 Atom actualType;
459 int actualFormat;
460 unsigned long sizeData, bytesLeft;
461 int i;
462
463 /*
464 * The SERVER_OVERLAY_VISUALS property on the root window contains
465 * a list of overlay visuals. Get that list now.
466 */
467 overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
468 if (overlayVisualsAtom == None) {
469 return -1;
470 }
471
472 status = XGetWindowProperty(dpy, RootWindow( dpy, vinfo->screen ),
473 overlayVisualsAtom, 0L, (long) 10000, False,
474 overlayVisualsAtom, &actualType, &actualFormat,
475 &sizeData, &bytesLeft,
476 (unsigned char **) &overlay_info );
477
478 if (status != Success || actualType != overlayVisualsAtom ||
479 actualFormat != 32 || sizeData < 4) {
480 /* something went wrong */
481 XFree((void *) overlay_info);
482 return -1;
483 }
484
485 /* search the overlay visual list for the visual ID of interest */
486 numOverlaysPerScreen = (int) (sizeData / 4);
487 for (i=0;i<numOverlaysPerScreen;i++) {
488 OverlayInfo *ov;
489 ov = overlay_info + i;
490 if (ov->overlay_visual==vinfo->visualid) {
491 /* found it! */
492 if (ov->transparent_type==0) {
493 /* type 0 indicates no transparency */
494 XFree((void *) overlay_info);
495 return -1;
496 }
497 else {
498 /* ov->value is the transparent pixel */
499 XFree((void *) overlay_info);
500 return ov->value;
501 }
502 }
503 }
504
505 /* The visual ID was not found in the overlay list. */
506 XFree((void *) overlay_info);
507 return -1;
508 }
509
510
511
512 /*
513 * Try to get an X visual which matches the given arguments.
514 */
515 static XVisualInfo *get_visual( Display *dpy, int scr,
516 unsigned int depth, int xclass )
517 {
518 XVisualInfo temp, *vis;
519 long mask;
520 int n;
521 unsigned int default_depth;
522 int default_class;
523
524 mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
525 temp.screen = scr;
526 temp.depth = depth;
527 temp.CLASS = xclass;
528
529 default_depth = DefaultDepth(dpy,scr);
530 default_class = DefaultVisual(dpy,scr)->CLASS;
531
532 if (depth==default_depth && xclass==default_class) {
533 /* try to get root window's visual */
534 temp.visualid = DefaultVisual(dpy,scr)->visualid;
535 mask |= VisualIDMask;
536 }
537
538 vis = XGetVisualInfo( dpy, mask, &temp, &n );
539
540 /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
541 * An SGI Infinite Reality system, for example, can have 30bpp pixels:
542 * 10 bits per color channel. Mesa's limited to a max of 8 bits/channel.
543 */
544 if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
545 if (_mesa_bitcount((GLuint) vis->red_mask ) <= 8 &&
546 _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
547 _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
548 return vis;
549 }
550 else {
551 XFree((void *) vis);
552 return NULL;
553 }
554 }
555
556 return vis;
557 }
558
559
560
561 /*
562 * Retrieve the value of the given environment variable and find
563 * the X visual which matches it.
564 * Input: dpy - the display
565 * screen - the screen number
566 * varname - the name of the environment variable
567 * Return: an XVisualInfo pointer to NULL if error.
568 */
569 static XVisualInfo *get_env_visual(Display *dpy, int scr, const char *varname)
570 {
571 char value[100], type[100];
572 int depth, xclass = -1;
573 XVisualInfo *vis;
574
575 if (!_mesa_getenv( varname )) {
576 return NULL;
577 }
578
579 _mesa_strncpy( value, _mesa_getenv(varname), 100 );
580 value[99] = 0;
581
582 sscanf( value, "%s %d", type, &depth );
583
584 if (_mesa_strcmp(type,"TrueColor")==0) xclass = TrueColor;
585 else if (_mesa_strcmp(type,"DirectColor")==0) xclass = DirectColor;
586 else if (_mesa_strcmp(type,"PseudoColor")==0) xclass = PseudoColor;
587 else if (_mesa_strcmp(type,"StaticColor")==0) xclass = StaticColor;
588 else if (_mesa_strcmp(type,"GrayScale")==0) xclass = GrayScale;
589 else if (_mesa_strcmp(type,"StaticGray")==0) xclass = StaticGray;
590
591 if (xclass>-1 && depth>0) {
592 vis = get_visual( dpy, scr, depth, xclass );
593 if (vis) {
594 return vis;
595 }
596 }
597
598 _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
599 type, depth);
600
601 return NULL;
602 }
603
604
605
606 /*
607 * Select an X visual which satisfies the RGBA/CI flag and minimum depth.
608 * Input: dpy, screen - X display and screen number
609 * rgba - GL_TRUE = RGBA mode, GL_FALSE = CI mode
610 * min_depth - minimum visual depth
611 * preferred_class - preferred GLX visual class or DONT_CARE
612 * Return: pointer to an XVisualInfo or NULL.
613 */
614 static XVisualInfo *choose_x_visual( Display *dpy, int screen,
615 GLboolean rgba, int min_depth,
616 int preferred_class )
617 {
618 XVisualInfo *vis;
619 int xclass, visclass = 0;
620 int depth;
621
622 if (rgba) {
623 Atom hp_cr_maps = XInternAtom(dpy, "_HP_RGB_SMOOTH_MAP_LIST", True);
624 /* First see if the MESA_RGB_VISUAL env var is defined */
625 vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
626 if (vis) {
627 return vis;
628 }
629 /* Otherwise, search for a suitable visual */
630 if (preferred_class==DONT_CARE) {
631 for (xclass=0;xclass<6;xclass++) {
632 switch (xclass) {
633 case 0: visclass = TrueColor; break;
634 case 1: visclass = DirectColor; break;
635 case 2: visclass = PseudoColor; break;
636 case 3: visclass = StaticColor; break;
637 case 4: visclass = GrayScale; break;
638 case 5: visclass = StaticGray; break;
639 }
640 if (min_depth==0) {
641 /* start with shallowest */
642 for (depth=0;depth<=32;depth++) {
643 if (visclass==TrueColor && depth==8 && !hp_cr_maps) {
644 /* Special case: try to get 8-bit PseudoColor before */
645 /* 8-bit TrueColor */
646 vis = get_visual( dpy, screen, 8, PseudoColor );
647 if (vis) {
648 return vis;
649 }
650 }
651 vis = get_visual( dpy, screen, depth, visclass );
652 if (vis) {
653 return vis;
654 }
655 }
656 }
657 else {
658 /* start with deepest */
659 for (depth=32;depth>=min_depth;depth--) {
660 if (visclass==TrueColor && depth==8 && !hp_cr_maps) {
661 /* Special case: try to get 8-bit PseudoColor before */
662 /* 8-bit TrueColor */
663 vis = get_visual( dpy, screen, 8, PseudoColor );
664 if (vis) {
665 return vis;
666 }
667 }
668 vis = get_visual( dpy, screen, depth, visclass );
669 if (vis) {
670 return vis;
671 }
672 }
673 }
674 }
675 }
676 else {
677 /* search for a specific visual class */
678 switch (preferred_class) {
679 case GLX_TRUE_COLOR_EXT: visclass = TrueColor; break;
680 case GLX_DIRECT_COLOR_EXT: visclass = DirectColor; break;
681 case GLX_PSEUDO_COLOR_EXT: visclass = PseudoColor; break;
682 case GLX_STATIC_COLOR_EXT: visclass = StaticColor; break;
683 case GLX_GRAY_SCALE_EXT: visclass = GrayScale; break;
684 case GLX_STATIC_GRAY_EXT: visclass = StaticGray; break;
685 default: return NULL;
686 }
687 if (min_depth==0) {
688 /* start with shallowest */
689 for (depth=0;depth<=32;depth++) {
690 vis = get_visual( dpy, screen, depth, visclass );
691 if (vis) {
692 return vis;
693 }
694 }
695 }
696 else {
697 /* start with deepest */
698 for (depth=32;depth>=min_depth;depth--) {
699 vis = get_visual( dpy, screen, depth, visclass );
700 if (vis) {
701 return vis;
702 }
703 }
704 }
705 }
706 }
707 else {
708 /* First see if the MESA_CI_VISUAL env var is defined */
709 vis = get_env_visual( dpy, screen, "MESA_CI_VISUAL" );
710 if (vis) {
711 return vis;
712 }
713 /* Otherwise, search for a suitable visual, starting with shallowest */
714 if (preferred_class==DONT_CARE) {
715 for (xclass=0;xclass<4;xclass++) {
716 switch (xclass) {
717 case 0: visclass = PseudoColor; break;
718 case 1: visclass = StaticColor; break;
719 case 2: visclass = GrayScale; break;
720 case 3: visclass = StaticGray; break;
721 }
722 /* try 8-bit up through 16-bit */
723 for (depth=8;depth<=16;depth++) {
724 vis = get_visual( dpy, screen, depth, visclass );
725 if (vis) {
726 return vis;
727 }
728 }
729 /* try min_depth up to 8-bit */
730 for (depth=min_depth;depth<8;depth++) {
731 vis = get_visual( dpy, screen, depth, visclass );
732 if (vis) {
733 return vis;
734 }
735 }
736 }
737 }
738 else {
739 /* search for a specific visual class */
740 switch (preferred_class) {
741 case GLX_TRUE_COLOR_EXT: visclass = TrueColor; break;
742 case GLX_DIRECT_COLOR_EXT: visclass = DirectColor; break;
743 case GLX_PSEUDO_COLOR_EXT: visclass = PseudoColor; break;
744 case GLX_STATIC_COLOR_EXT: visclass = StaticColor; break;
745 case GLX_GRAY_SCALE_EXT: visclass = GrayScale; break;
746 case GLX_STATIC_GRAY_EXT: visclass = StaticGray; break;
747 default: return NULL;
748 }
749 /* try 8-bit up through 16-bit */
750 for (depth=8;depth<=16;depth++) {
751 vis = get_visual( dpy, screen, depth, visclass );
752 if (vis) {
753 return vis;
754 }
755 }
756 /* try min_depth up to 8-bit */
757 for (depth=min_depth;depth<8;depth++) {
758 vis = get_visual( dpy, screen, depth, visclass );
759 if (vis) {
760 return vis;
761 }
762 }
763 }
764 }
765
766 /* didn't find a visual */
767 return NULL;
768 }
769
770
771
772 /*
773 * Find the deepest X over/underlay visual of at least min_depth.
774 * Input: dpy, screen - X display and screen number
775 * level - the over/underlay level
776 * trans_type - transparent pixel type: GLX_NONE_EXT,
777 * GLX_TRANSPARENT_RGB_EXT, GLX_TRANSPARENT_INDEX_EXT,
778 * or DONT_CARE
779 * trans_value - transparent pixel value or DONT_CARE
780 * min_depth - minimum visual depth
781 * preferred_class - preferred GLX visual class or DONT_CARE
782 * Return: pointer to an XVisualInfo or NULL.
783 */
784 static XVisualInfo *choose_x_overlay_visual( Display *dpy, int scr,
785 GLboolean rgbFlag,
786 int level, int trans_type,
787 int trans_value,
788 int min_depth,
789 int preferred_class )
790 {
791 Atom overlayVisualsAtom;
792 OverlayInfo *overlay_info;
793 int numOverlaysPerScreen;
794 Status status;
795 Atom actualType;
796 int actualFormat;
797 unsigned long sizeData, bytesLeft;
798 int i;
799 XVisualInfo *deepvis;
800 int deepest;
801
802 /*DEBUG int tt, tv; */
803
804 switch (preferred_class) {
805 case GLX_TRUE_COLOR_EXT: preferred_class = TrueColor; break;
806 case GLX_DIRECT_COLOR_EXT: preferred_class = DirectColor; break;
807 case GLX_PSEUDO_COLOR_EXT: preferred_class = PseudoColor; break;
808 case GLX_STATIC_COLOR_EXT: preferred_class = StaticColor; break;
809 case GLX_GRAY_SCALE_EXT: preferred_class = GrayScale; break;
810 case GLX_STATIC_GRAY_EXT: preferred_class = StaticGray; break;
811 default: preferred_class = DONT_CARE;
812 }
813
814 /*
815 * The SERVER_OVERLAY_VISUALS property on the root window contains
816 * a list of overlay visuals. Get that list now.
817 */
818 overlayVisualsAtom = XInternAtom(dpy,"SERVER_OVERLAY_VISUALS", True);
819 if (overlayVisualsAtom == (Atom) None) {
820 return NULL;
821 }
822
823 status = XGetWindowProperty(dpy, RootWindow( dpy, scr ),
824 overlayVisualsAtom, 0L, (long) 10000, False,
825 overlayVisualsAtom, &actualType, &actualFormat,
826 &sizeData, &bytesLeft,
827 (unsigned char **) &overlay_info );
828
829 if (status != Success || actualType != overlayVisualsAtom ||
830 actualFormat != 32 || sizeData < 4) {
831 /* something went wrong */
832 return NULL;
833 }
834
835 /* Search for the deepest overlay which satisifies all criteria. */
836 deepest = min_depth;
837 deepvis = NULL;
838
839 numOverlaysPerScreen = (int) (sizeData / 4);
840 for (i=0;i<numOverlaysPerScreen;i++) {
841 XVisualInfo *vislist, vistemplate;
842 int count;
843 OverlayInfo *ov;
844 ov = overlay_info + i;
845
846 if (ov->layer!=level) {
847 /* failed overlay level criteria */
848 continue;
849 }
850 if (!(trans_type==DONT_CARE
851 || (trans_type==GLX_TRANSPARENT_INDEX_EXT
852 && ov->transparent_type>0)
853 || (trans_type==GLX_NONE_EXT && ov->transparent_type==0))) {
854 /* failed transparent pixel type criteria */
855 continue;
856 }
857 if (trans_value!=DONT_CARE && trans_value!=ov->value) {
858 /* failed transparent pixel value criteria */
859 continue;
860 }
861
862 /* get XVisualInfo and check the depth */
863 vistemplate.visualid = ov->overlay_visual;
864 vistemplate.screen = scr;
865 vislist = XGetVisualInfo( dpy, VisualIDMask | VisualScreenMask,
866 &vistemplate, &count );
867
868 if (count!=1) {
869 /* something went wrong */
870 continue;
871 }
872 if (preferred_class!=DONT_CARE && preferred_class!=vislist->CLASS) {
873 /* wrong visual class */
874 continue;
875 }
876
877 /* if RGB was requested, make sure we have True/DirectColor */
878 if (rgbFlag && vislist->CLASS != TrueColor
879 && vislist->CLASS != DirectColor)
880 continue;
881
882 /* if CI was requested, make sure we have a color indexed visual */
883 if (!rgbFlag
884 && (vislist->CLASS == TrueColor || vislist->CLASS == DirectColor))
885 continue;
886
887 if (deepvis==NULL || vislist->depth > deepest) {
888 /* YES! found a satisfactory visual */
889 if (deepvis) {
890 XFree( deepvis );
891 }
892 deepest = vislist->depth;
893 deepvis = vislist;
894 /* DEBUG tt = ov->transparent_type;*/
895 /* DEBUG tv = ov->value; */
896 }
897 }
898
899 /*DEBUG
900 if (deepvis) {
901 printf("chose 0x%x: layer=%d depth=%d trans_type=%d trans_value=%d\n",
902 deepvis->visualid, level, deepvis->depth, tt, tv );
903 }
904 */
905 return deepvis;
906 }
907
908
909 /**********************************************************************/
910 /*** Begin Fake GLX API Functions ***/
911 /**********************************************************************/
912
913
914 static XMesaVisual choose_visual( Display *dpy, int screen, const int *list )
915 {
916 const int *parselist;
917 XVisualInfo *vis;
918 int min_ci = 0;
919 int min_red=0, min_green=0, min_blue=0;
920 GLboolean rgb_flag = GL_FALSE;
921 GLboolean alpha_flag = GL_FALSE;
922 GLboolean double_flag = GL_FALSE;
923 GLboolean stereo_flag = GL_FALSE;
924 GLint depth_size = 0;
925 GLint stencil_size = 0;
926 GLint accumRedSize = 0;
927 GLint accumGreenSize = 0;
928 GLint accumBlueSize = 0;
929 GLint accumAlphaSize = 0;
930 int level = 0;
931 int visual_type = DONT_CARE;
932 int trans_type = DONT_CARE;
933 int trans_value = DONT_CARE;
934 GLint caveat = DONT_CARE;
935 XMesaVisual xmvis = NULL;
936
937 parselist = list;
938
939 while (*parselist) {
940
941 switch (*parselist) {
942 case GLX_USE_GL:
943 /* ignore */
944 parselist++;
945 break;
946 case GLX_BUFFER_SIZE:
947 parselist++;
948 min_ci = *parselist++;
949 break;
950 case GLX_LEVEL:
951 parselist++;
952 level = *parselist++;
953 break;
954 case GLX_RGBA:
955 rgb_flag = GL_TRUE;
956 parselist++;
957 break;
958 case GLX_DOUBLEBUFFER:
959 double_flag = GL_TRUE;
960 parselist++;
961 break;
962 case GLX_STEREO:
963 stereo_flag = GL_TRUE;
964 return NULL;
965 case GLX_AUX_BUFFERS:
966 /* ignore */
967 parselist++;
968 parselist++;
969 break;
970 case GLX_RED_SIZE:
971 parselist++;
972 min_red = *parselist++;
973 break;
974 case GLX_GREEN_SIZE:
975 parselist++;
976 min_green = *parselist++;
977 break;
978 case GLX_BLUE_SIZE:
979 parselist++;
980 min_blue = *parselist++;
981 break;
982 case GLX_ALPHA_SIZE:
983 parselist++;
984 {
985 GLint size = *parselist++;
986 alpha_flag = size>0 ? 1 : 0;
987 }
988 break;
989 case GLX_DEPTH_SIZE:
990 parselist++;
991 depth_size = *parselist++;
992 break;
993 case GLX_STENCIL_SIZE:
994 parselist++;
995 stencil_size = *parselist++;
996 break;
997 case GLX_ACCUM_RED_SIZE:
998 parselist++;
999 {
1000 GLint size = *parselist++;
1001 accumRedSize = MAX2( accumRedSize, size );
1002 }
1003 break;
1004 case GLX_ACCUM_GREEN_SIZE:
1005 parselist++;
1006 {
1007 GLint size = *parselist++;
1008 accumGreenSize = MAX2( accumGreenSize, size );
1009 }
1010 break;
1011 case GLX_ACCUM_BLUE_SIZE:
1012 parselist++;
1013 {
1014 GLint size = *parselist++;
1015 accumBlueSize = MAX2( accumBlueSize, size );
1016 }
1017 break;
1018 case GLX_ACCUM_ALPHA_SIZE:
1019 parselist++;
1020 {
1021 GLint size = *parselist++;
1022 accumAlphaSize = MAX2( accumAlphaSize, size );
1023 }
1024 break;
1025
1026 /*
1027 * GLX_EXT_visual_info extension
1028 */
1029 case GLX_X_VISUAL_TYPE_EXT:
1030 parselist++;
1031 visual_type = *parselist++;
1032 break;
1033 case GLX_TRANSPARENT_TYPE_EXT:
1034 parselist++;
1035 trans_type = *parselist++;
1036 break;
1037 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1038 parselist++;
1039 trans_value = *parselist++;
1040 break;
1041 case GLX_TRANSPARENT_RED_VALUE_EXT:
1042 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1043 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1044 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1045 /* ignore */
1046 parselist++;
1047 parselist++;
1048 break;
1049
1050 /*
1051 * GLX_EXT_visual_info extension
1052 */
1053 case GLX_VISUAL_CAVEAT_EXT:
1054 parselist++;
1055 caveat = *parselist++; /* ignored for now */
1056 break;
1057
1058 /*
1059 * GLX_ARB_multisample
1060 */
1061 case GLX_SAMPLE_BUFFERS_ARB:
1062 /* ms not supported */
1063 return NULL;
1064 case GLX_SAMPLES_ARB:
1065 /* ms not supported */
1066 return NULL;
1067
1068 /*
1069 * FBConfig attribs.
1070 */
1071 case GLX_RENDER_TYPE:
1072 parselist++;
1073 if (*parselist == GLX_RGBA_BIT) {
1074 rgb_flag = GL_TRUE;
1075 }
1076 else if (*parselist == GLX_COLOR_INDEX_BIT) {
1077 rgb_flag = GL_FALSE;
1078 }
1079 else if (*parselist == 0) {
1080 rgb_flag = GL_TRUE;
1081 }
1082 parselist++;
1083 break;
1084 case GLX_DRAWABLE_TYPE:
1085 parselist++;
1086 if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
1087 return NULL; /* bad bit */
1088 }
1089 parselist++;
1090 break;
1091
1092 case None:
1093 break;
1094
1095 default:
1096 /* undefined attribute */
1097 _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
1098 *parselist);
1099 return NULL;
1100 }
1101 }
1102
1103 /*
1104 * Since we're only simulating the GLX extension this function will never
1105 * find any real GL visuals. Instead, all we can do is try to find an RGB
1106 * or CI visual of appropriate depth. Other requested attributes such as
1107 * double buffering, depth buffer, etc. will be associated with the X
1108 * visual and stored in the VisualTable[].
1109 */
1110 if (level==0) {
1111 /* normal color planes */
1112 if (rgb_flag) {
1113 /* Get an RGB visual */
1114 int min_rgb = min_red + min_green + min_blue;
1115 if (min_rgb>1 && min_rgb<8) {
1116 /* a special case to be sure we can get a monochrome visual */
1117 min_rgb = 1;
1118 }
1119 vis = choose_x_visual( dpy, screen, rgb_flag, min_rgb, visual_type );
1120 }
1121 else {
1122 /* Get a color index visual */
1123 vis = choose_x_visual( dpy, screen, rgb_flag, min_ci, visual_type );
1124 accumRedSize = accumGreenSize = accumBlueSize = accumAlphaSize = 0;
1125 }
1126 }
1127 else {
1128 /* over/underlay planes */
1129 if (rgb_flag) {
1130 /* rgba overlay */
1131 int min_rgb = min_red + min_green + min_blue;
1132 if (min_rgb>1 && min_rgb<8) {
1133 /* a special case to be sure we can get a monochrome visual */
1134 min_rgb = 1;
1135 }
1136 vis = choose_x_overlay_visual( dpy, screen, rgb_flag, level,
1137 trans_type, trans_value, min_rgb, visual_type );
1138 }
1139 else {
1140 /* color index overlay */
1141 vis = choose_x_overlay_visual( dpy, screen, rgb_flag, level,
1142 trans_type, trans_value, min_ci, visual_type );
1143 }
1144 }
1145
1146 if (vis) {
1147 /* Note: we're not exactly obeying the glXChooseVisual rules here.
1148 * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
1149 * largest depth buffer size, which is 32bits/value. Instead, we
1150 * return 16 to maintain performance with earlier versions of Mesa.
1151 */
1152 if (depth_size > 24)
1153 depth_size = 31; /* 32 causes int overflow problems */
1154 else if (depth_size > 16)
1155 depth_size = 24;
1156 else if (depth_size > 0)
1157 depth_size = DEFAULT_SOFTWARE_DEPTH_BITS; /*16*/
1158
1159 /* we only support one size of stencil and accum buffers. */
1160 if (stencil_size > 0)
1161 stencil_size = STENCIL_BITS;
1162 if (accumRedSize > 0 || accumGreenSize > 0 || accumBlueSize > 0 ||
1163 accumAlphaSize > 0) {
1164 accumRedSize = ACCUM_BITS;
1165 accumGreenSize = ACCUM_BITS;
1166 accumBlueSize = ACCUM_BITS;
1167 accumAlphaSize = alpha_flag ? ACCUM_BITS : 0;
1168 }
1169
1170 xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
1171 stereo_flag, depth_size, stencil_size,
1172 accumRedSize, accumGreenSize,
1173 accumBlueSize, accumAlphaSize, level );
1174 }
1175
1176 return xmvis;
1177 }
1178
1179
1180 static XVisualInfo *
1181 Fake_glXChooseVisual( Display *dpy, int screen, int *list )
1182 {
1183 XMesaVisual xmvis = choose_visual(dpy, screen, list);
1184 if (xmvis) {
1185 #if 0
1186 return xmvis->vishandle;
1187 #else
1188 /* create a new vishandle - the cached one may be stale */
1189 xmvis->vishandle = _mesa_malloc(sizeof(XVisualInfo));
1190 if (xmvis->vishandle) {
1191 _mesa_memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1192 }
1193 return xmvis->vishandle;
1194 #endif
1195 }
1196 else
1197 return NULL;
1198 }
1199
1200
1201 static GLXContext
1202 Fake_glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1203 GLXContext share_list, Bool direct )
1204 {
1205 XMesaVisual xmvis;
1206 struct fake_glx_context *glxCtx;
1207 struct fake_glx_context *shareCtx = (struct fake_glx_context *) share_list;
1208
1209 if (!dpy || !visinfo)
1210 return 0;
1211
1212 glxCtx = CALLOC_STRUCT(fake_glx_context);
1213 if (!glxCtx)
1214 return 0;
1215
1216 /* deallocate unused windows/buffers */
1217 XMesaGarbageCollect();
1218
1219 xmvis = find_glx_visual( dpy, visinfo );
1220 if (!xmvis) {
1221 /* This visual wasn't found with glXChooseVisual() */
1222 xmvis = create_glx_visual( dpy, visinfo );
1223 if (!xmvis) {
1224 /* unusable visual */
1225 FREE(glxCtx);
1226 return NULL;
1227 }
1228 }
1229
1230 glxCtx->xmesaContext = XMesaCreateContext(xmvis,
1231 shareCtx ? shareCtx->xmesaContext : NULL);
1232 if (!glxCtx->xmesaContext) {
1233 FREE(glxCtx);
1234 return NULL;
1235 }
1236
1237 glxCtx->xmesaContext->direct = GL_FALSE;
1238 glxCtx->glxContext.isDirect = GL_FALSE;
1239 glxCtx->glxContext.currentDpy = dpy;
1240 glxCtx->glxContext.xid = (XID) glxCtx; /* self pointer */
1241
1242 assert((void *) glxCtx == (void *) &(glxCtx->glxContext));
1243
1244 return (GLXContext) glxCtx;
1245 }
1246
1247
1248 /* XXX these may have to be removed due to thread-safety issues. */
1249 static GLXContext MakeCurrent_PrevContext = 0;
1250 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1251 static GLXDrawable MakeCurrent_PrevReadable = 0;
1252 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1253 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1254
1255
1256 /* GLX 1.3 and later */
1257 static Bool
1258 Fake_glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1259 GLXDrawable read, GLXContext ctx )
1260 {
1261 struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1262
1263 if (ctx && draw && read) {
1264 XMesaBuffer drawBuffer, readBuffer;
1265 XMesaContext xmctx = glxCtx->xmesaContext;
1266
1267 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1268 if (ctx == MakeCurrent_PrevContext
1269 && draw == MakeCurrent_PrevDrawable) {
1270 drawBuffer = MakeCurrent_PrevDrawBuffer;
1271 }
1272 else {
1273 drawBuffer = XMesaFindBuffer( dpy, draw );
1274 }
1275 if (!drawBuffer) {
1276 /* drawable must be a new window! */
1277 drawBuffer = XMesaCreateWindowBuffer2( xmctx->xm_visual, draw, xmctx);
1278 if (!drawBuffer) {
1279 /* Out of memory, or context/drawable depth mismatch */
1280 return False;
1281 }
1282 }
1283
1284 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1285 if (ctx == MakeCurrent_PrevContext
1286 && read == MakeCurrent_PrevReadable) {
1287 readBuffer = MakeCurrent_PrevReadBuffer;
1288 }
1289 else {
1290 readBuffer = XMesaFindBuffer( dpy, read );
1291 }
1292 if (!readBuffer) {
1293 /* drawable must be a new window! */
1294 readBuffer = XMesaCreateWindowBuffer2(glxCtx->xmesaContext->xm_visual,
1295 read, xmctx);
1296 if (!readBuffer) {
1297 /* Out of memory, or context/drawable depth mismatch */
1298 return False;
1299 }
1300 }
1301
1302 MakeCurrent_PrevContext = ctx;
1303 MakeCurrent_PrevDrawable = draw;
1304 MakeCurrent_PrevReadable = read;
1305 MakeCurrent_PrevDrawBuffer = drawBuffer;
1306 MakeCurrent_PrevReadBuffer = readBuffer;
1307
1308 /* Now make current! */
1309 if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1310 ((__GLXcontext *) ctx)->currentDpy = dpy;
1311 ((__GLXcontext *) ctx)->currentDrawable = draw;
1312 #ifndef GLX_BUILT_IN_XMESA
1313 ((__GLXcontext *) ctx)->currentReadable = read;
1314 #else
1315 __glXSetCurrentContext(ctx);
1316 #endif
1317 return True;
1318 }
1319 else {
1320 return False;
1321 }
1322 }
1323 else if (!ctx && !draw && !read) {
1324 /* release current context w/out assigning new one. */
1325 XMesaMakeCurrent( NULL, NULL );
1326 MakeCurrent_PrevContext = 0;
1327 MakeCurrent_PrevDrawable = 0;
1328 MakeCurrent_PrevReadable = 0;
1329 MakeCurrent_PrevDrawBuffer = 0;
1330 MakeCurrent_PrevReadBuffer = 0;
1331 #ifdef GLX_BUILT_IN_XMESA
1332 /* XXX bind dummy context with __glXSetCurrentContext(ctx); */
1333 #endif
1334 return True;
1335 }
1336 else {
1337 /* The args must either all be non-zero or all zero.
1338 * This is an error.
1339 */
1340 return False;
1341 }
1342 }
1343
1344
1345
1346 static Bool
1347 Fake_glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1348 {
1349 return Fake_glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1350 }
1351
1352
1353
1354 static GLXPixmap
1355 Fake_glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1356 {
1357 XMesaVisual v;
1358 XMesaBuffer b;
1359
1360 v = find_glx_visual( dpy, visinfo );
1361 if (!v) {
1362 v = create_glx_visual( dpy, visinfo );
1363 if (!v) {
1364 /* unusable visual */
1365 return 0;
1366 }
1367 }
1368
1369 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1370 if (!b) {
1371 return 0;
1372 }
1373 return b->frontbuffer;
1374 }
1375
1376
1377 /*** GLX_MESA_pixmap_colormap ***/
1378
1379 static GLXPixmap
1380 Fake_glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1381 Pixmap pixmap, Colormap cmap )
1382 {
1383 XMesaVisual v;
1384 XMesaBuffer b;
1385
1386 v = find_glx_visual( dpy, visinfo );
1387 if (!v) {
1388 v = create_glx_visual( dpy, visinfo );
1389 if (!v) {
1390 /* unusable visual */
1391 return 0;
1392 }
1393 }
1394
1395 b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1396 if (!b) {
1397 return 0;
1398 }
1399 return b->frontbuffer;
1400 }
1401
1402
1403 static void
1404 Fake_glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1405 {
1406 XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1407 if (b) {
1408 XMesaDestroyBuffer(b);
1409 }
1410 else if (_mesa_getenv("MESA_DEBUG")) {
1411 _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1412 }
1413 }
1414
1415
1416
1417 static void
1418 Fake_glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1419 unsigned long mask )
1420 {
1421 struct fake_glx_context *fakeSrc = (struct fake_glx_context *) src;
1422 struct fake_glx_context *fakeDst = (struct fake_glx_context *) dst;
1423 XMesaContext xm_src = fakeSrc->xmesaContext;
1424 XMesaContext xm_dst = fakeDst->xmesaContext;
1425 (void) dpy;
1426 _mesa_copy_context( xm_src->gl_ctx, xm_dst->gl_ctx, (GLuint) mask );
1427 }
1428
1429
1430
1431 static Bool
1432 Fake_glXQueryExtension( Display *dpy, int *errorb, int *event )
1433 {
1434 /* Mesa's GLX isn't really an X extension but we try to act like one. */
1435 (void) dpy;
1436 (void) errorb;
1437 (void) event;
1438 return True;
1439 }
1440
1441
1442 extern void _kw_ungrab_all( Display *dpy );
1443 void _kw_ungrab_all( Display *dpy )
1444 {
1445 XUngrabPointer( dpy, CurrentTime );
1446 XUngrabKeyboard( dpy, CurrentTime );
1447 }
1448
1449
1450 static void
1451 Fake_glXDestroyContext( Display *dpy, GLXContext ctx )
1452 {
1453 struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1454 (void) dpy;
1455 MakeCurrent_PrevContext = 0;
1456 MakeCurrent_PrevDrawable = 0;
1457 MakeCurrent_PrevReadable = 0;
1458 MakeCurrent_PrevDrawBuffer = 0;
1459 MakeCurrent_PrevReadBuffer = 0;
1460 XMesaDestroyContext( glxCtx->xmesaContext );
1461 XMesaGarbageCollect();
1462 }
1463
1464
1465
1466 static Bool
1467 Fake_glXIsDirect( Display *dpy, GLXContext ctx )
1468 {
1469 struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
1470 (void) dpy;
1471 return glxCtx->xmesaContext->direct;
1472 }
1473
1474
1475
1476 static void
1477 Fake_glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1478 {
1479 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1480
1481 if (buffer) {
1482 XMesaSwapBuffers(buffer);
1483 }
1484 else if (_mesa_getenv("MESA_DEBUG")) {
1485 _mesa_warning(NULL, "Mesa: glXSwapBuffers: invalid drawable\n");
1486 }
1487 }
1488
1489
1490
1491 /*** GLX_MESA_copy_sub_buffer ***/
1492
1493 static void
1494 Fake_glXCopySubBufferMESA( Display *dpy, GLXDrawable drawable,
1495 int x, int y, int width, int height )
1496 {
1497 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1498 if (buffer) {
1499 XMesaCopySubBuffer(buffer, x, y, width, height);
1500 }
1501 else if (_mesa_getenv("MESA_DEBUG")) {
1502 _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1503 }
1504 }
1505
1506
1507
1508 static Bool
1509 Fake_glXQueryVersion( Display *dpy, int *maj, int *min )
1510 {
1511 (void) dpy;
1512 /* Return GLX version, not Mesa version */
1513 assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1514 *maj = CLIENT_MAJOR_VERSION;
1515 *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1516 return True;
1517 }
1518
1519
1520
1521 /*
1522 * Query the GLX attributes of the given XVisualInfo.
1523 */
1524 static int
1525 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1526 {
1527 ASSERT(xmvis);
1528 switch(attrib) {
1529 case GLX_USE_GL:
1530 *value = (int) True;
1531 return 0;
1532 case GLX_BUFFER_SIZE:
1533 *value = xmvis->visinfo->depth;
1534 return 0;
1535 case GLX_LEVEL:
1536 *value = xmvis->level;
1537 return 0;
1538 case GLX_RGBA:
1539 if (xmvis->mesa_visual.rgbMode) {
1540 *value = True;
1541 }
1542 else {
1543 *value = False;
1544 }
1545 return 0;
1546 case GLX_DOUBLEBUFFER:
1547 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1548 return 0;
1549 case GLX_STEREO:
1550 *value = (int) xmvis->mesa_visual.stereoMode;
1551 return 0;
1552 case GLX_AUX_BUFFERS:
1553 *value = (int) False;
1554 return 0;
1555 case GLX_RED_SIZE:
1556 *value = xmvis->mesa_visual.redBits;
1557 return 0;
1558 case GLX_GREEN_SIZE:
1559 *value = xmvis->mesa_visual.greenBits;
1560 return 0;
1561 case GLX_BLUE_SIZE:
1562 *value = xmvis->mesa_visual.blueBits;
1563 return 0;
1564 case GLX_ALPHA_SIZE:
1565 *value = xmvis->mesa_visual.alphaBits;
1566 return 0;
1567 case GLX_DEPTH_SIZE:
1568 *value = xmvis->mesa_visual.depthBits;
1569 return 0;
1570 case GLX_STENCIL_SIZE:
1571 *value = xmvis->mesa_visual.stencilBits;
1572 return 0;
1573 case GLX_ACCUM_RED_SIZE:
1574 *value = xmvis->mesa_visual.accumRedBits;
1575 return 0;
1576 case GLX_ACCUM_GREEN_SIZE:
1577 *value = xmvis->mesa_visual.accumGreenBits;
1578 return 0;
1579 case GLX_ACCUM_BLUE_SIZE:
1580 *value = xmvis->mesa_visual.accumBlueBits;
1581 return 0;
1582 case GLX_ACCUM_ALPHA_SIZE:
1583 *value = xmvis->mesa_visual.accumAlphaBits;
1584 return 0;
1585
1586 /*
1587 * GLX_EXT_visual_info extension
1588 */
1589 case GLX_X_VISUAL_TYPE_EXT:
1590 switch (xmvis->visinfo->CLASS) {
1591 case StaticGray: *value = GLX_STATIC_GRAY_EXT; return 0;
1592 case GrayScale: *value = GLX_GRAY_SCALE_EXT; return 0;
1593 case StaticColor: *value = GLX_STATIC_GRAY_EXT; return 0;
1594 case PseudoColor: *value = GLX_PSEUDO_COLOR_EXT; return 0;
1595 case TrueColor: *value = GLX_TRUE_COLOR_EXT; return 0;
1596 case DirectColor: *value = GLX_DIRECT_COLOR_EXT; return 0;
1597 }
1598 return 0;
1599 case GLX_TRANSPARENT_TYPE_EXT:
1600 if (xmvis->level==0) {
1601 /* normal planes */
1602 *value = GLX_NONE_EXT;
1603 }
1604 else if (xmvis->level>0) {
1605 /* overlay */
1606 if (xmvis->mesa_visual.rgbMode) {
1607 *value = GLX_TRANSPARENT_RGB_EXT;
1608 }
1609 else {
1610 *value = GLX_TRANSPARENT_INDEX_EXT;
1611 }
1612 }
1613 else if (xmvis->level<0) {
1614 /* underlay */
1615 *value = GLX_NONE_EXT;
1616 }
1617 return 0;
1618 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1619 {
1620 int pixel = transparent_pixel( xmvis );
1621 if (pixel>=0) {
1622 *value = pixel;
1623 }
1624 /* else undefined */
1625 }
1626 return 0;
1627 case GLX_TRANSPARENT_RED_VALUE_EXT:
1628 /* undefined */
1629 return 0;
1630 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1631 /* undefined */
1632 return 0;
1633 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1634 /* undefined */
1635 return 0;
1636 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1637 /* undefined */
1638 return 0;
1639
1640 /*
1641 * GLX_EXT_visual_info extension
1642 */
1643 case GLX_VISUAL_CAVEAT_EXT:
1644 /* test for zero, just in case */
1645 if (xmvis->VisualCaveat > 0)
1646 *value = xmvis->VisualCaveat;
1647 else
1648 *value = GLX_NONE_EXT;
1649 return 0;
1650
1651 /*
1652 * GLX_ARB_multisample
1653 */
1654 case GLX_SAMPLE_BUFFERS_ARB:
1655 *value = 0;
1656 return 0;
1657 case GLX_SAMPLES_ARB:
1658 *value = 0;
1659 return 0;
1660
1661 /*
1662 * For FBConfigs:
1663 */
1664 case GLX_SCREEN_EXT:
1665 if (!fbconfig)
1666 return GLX_BAD_ATTRIBUTE;
1667 *value = xmvis->visinfo->screen;
1668 break;
1669 case GLX_DRAWABLE_TYPE: /*SGIX too */
1670 if (!fbconfig)
1671 return GLX_BAD_ATTRIBUTE;
1672 *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1673 break;
1674 case GLX_RENDER_TYPE_SGIX:
1675 if (!fbconfig)
1676 return GLX_BAD_ATTRIBUTE;
1677 if (xmvis->mesa_visual.rgbMode)
1678 *value = GLX_RGBA_BIT;
1679 else
1680 *value = GLX_COLOR_INDEX_BIT;
1681 break;
1682 case GLX_X_RENDERABLE_SGIX:
1683 if (!fbconfig)
1684 return GLX_BAD_ATTRIBUTE;
1685 *value = True; /* XXX really? */
1686 break;
1687 case GLX_FBCONFIG_ID_SGIX:
1688 if (!fbconfig)
1689 return GLX_BAD_ATTRIBUTE;
1690 *value = xmvis->visinfo->visualid;
1691 break;
1692 case GLX_MAX_PBUFFER_WIDTH:
1693 if (!fbconfig)
1694 return GLX_BAD_ATTRIBUTE;
1695 /* XXX or MAX_WIDTH? */
1696 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1697 break;
1698 case GLX_MAX_PBUFFER_HEIGHT:
1699 if (!fbconfig)
1700 return GLX_BAD_ATTRIBUTE;
1701 *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1702 break;
1703 case GLX_MAX_PBUFFER_PIXELS:
1704 if (!fbconfig)
1705 return GLX_BAD_ATTRIBUTE;
1706 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1707 DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1708 break;
1709 case GLX_VISUAL_ID:
1710 if (!fbconfig)
1711 return GLX_BAD_ATTRIBUTE;
1712 *value = xmvis->visinfo->visualid;
1713 break;
1714
1715 default:
1716 return GLX_BAD_ATTRIBUTE;
1717 }
1718 return Success;
1719 }
1720
1721
1722 static int
1723 Fake_glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1724 int attrib, int *value )
1725 {
1726 XMesaVisual xmvis;
1727
1728 xmvis = find_glx_visual( dpy, visinfo );
1729 if (!xmvis) {
1730 /* this visual wasn't obtained with glXChooseVisual */
1731 xmvis = create_glx_visual( dpy, visinfo );
1732 if (!xmvis) {
1733 /* this visual can't be used for GL rendering */
1734 if (attrib==GLX_USE_GL) {
1735 *value = (int) False;
1736 return 0;
1737 }
1738 else {
1739 return GLX_BAD_VISUAL;
1740 }
1741 }
1742 }
1743
1744 return get_config(xmvis, attrib, value, GL_FALSE);
1745 }
1746
1747
1748 static void
1749 Fake_glXWaitGL( void )
1750 {
1751 XMesaContext xmesa = XMesaGetCurrentContext();
1752 XMesaFlush( xmesa );
1753 }
1754
1755
1756
1757 static void
1758 Fake_glXWaitX( void )
1759 {
1760 XMesaContext xmesa = XMesaGetCurrentContext();
1761 XMesaFlush( xmesa );
1762 }
1763
1764
1765 static const char *
1766 get_extensions( void )
1767 {
1768 #ifdef FX
1769 const char *fx = _mesa_getenv("MESA_GLX_FX");
1770 if (fx && fx[0] != 'd') {
1771 return EXTENSIONS;
1772 }
1773 #endif
1774 return EXTENSIONS + 23; /* skip "GLX_MESA_set_3dfx_mode" */
1775 }
1776
1777
1778
1779 /* GLX 1.1 and later */
1780 static const char *
1781 Fake_glXQueryExtensionsString( Display *dpy, int screen )
1782 {
1783 (void) dpy;
1784 (void) screen;
1785 return get_extensions();
1786 }
1787
1788
1789
1790 /* GLX 1.1 and later */
1791 static const char *
1792 Fake_glXQueryServerString( Display *dpy, int screen, int name )
1793 {
1794 static char version[1000];
1795 _mesa_sprintf(version, "%d.%d %s",
1796 SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, MESA_GLX_VERSION);
1797
1798 (void) dpy;
1799 (void) screen;
1800
1801 switch (name) {
1802 case GLX_EXTENSIONS:
1803 return get_extensions();
1804 case GLX_VENDOR:
1805 return VENDOR;
1806 case GLX_VERSION:
1807 return version;
1808 default:
1809 return NULL;
1810 }
1811 }
1812
1813
1814
1815 /* GLX 1.1 and later */
1816 static const char *
1817 Fake_glXGetClientString( Display *dpy, int name )
1818 {
1819 static char version[1000];
1820 _mesa_sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1821 CLIENT_MINOR_VERSION, MESA_GLX_VERSION);
1822
1823 (void) dpy;
1824
1825 switch (name) {
1826 case GLX_EXTENSIONS:
1827 return get_extensions();
1828 case GLX_VENDOR:
1829 return VENDOR;
1830 case GLX_VERSION:
1831 return version;
1832 default:
1833 return NULL;
1834 }
1835 }
1836
1837
1838
1839 /*
1840 * GLX 1.3 and later
1841 */
1842
1843
1844 static GLXFBConfig *
1845 Fake_glXChooseFBConfig( Display *dpy, int screen,
1846 const int *attribList, int *nitems )
1847 {
1848 XMesaVisual xmvis = choose_visual(dpy, screen, attribList);
1849 if (xmvis) {
1850 GLXFBConfig *config = _mesa_malloc(sizeof(XMesaVisual));
1851 if (!config) {
1852 *nitems = 0;
1853 return NULL;
1854 }
1855 *nitems = 1;
1856 config[0] = (GLXFBConfig) xmvis;
1857 return (GLXFBConfig *) config;
1858 }
1859 else {
1860 *nitems = 0;
1861 return NULL;
1862 }
1863 }
1864
1865
1866 static int
1867 Fake_glXGetFBConfigAttrib( Display *dpy, GLXFBConfig config,
1868 int attribute, int *value )
1869 {
1870 XMesaVisual v = (XMesaVisual) config;
1871 (void) dpy;
1872 (void) config;
1873
1874 if (!dpy || !config || !value)
1875 return -1;
1876
1877 return get_config(v, attribute, value, GL_TRUE);
1878 }
1879
1880
1881 static GLXFBConfig *
1882 Fake_glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1883 {
1884 XVisualInfo *visuals, visTemplate;
1885 const long visMask = VisualScreenMask;
1886 int i;
1887
1888 /* Get list of all X visuals */
1889 visTemplate.screen = screen;
1890 visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1891 if (*nelements > 0) {
1892 XMesaVisual *results;
1893 results = _mesa_malloc(*nelements * sizeof(XMesaVisual));
1894 if (!results) {
1895 *nelements = 0;
1896 return NULL;
1897 }
1898 for (i = 0; i < *nelements; i++) {
1899 results[i] = create_glx_visual(dpy, visuals + i);
1900 }
1901 return (GLXFBConfig *) results;
1902 }
1903 return NULL;
1904 }
1905
1906
1907 static XVisualInfo *
1908 Fake_glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1909 {
1910 if (dpy && config) {
1911 XMesaVisual xmvis = (XMesaVisual) config;
1912 #if 0
1913 return xmvis->vishandle;
1914 #else
1915 /* create a new vishandle - the cached one may be stale */
1916 xmvis->vishandle = _mesa_malloc(sizeof(XVisualInfo));
1917 if (xmvis->vishandle) {
1918 _mesa_memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1919 }
1920 return xmvis->vishandle;
1921 #endif
1922 }
1923 else {
1924 return NULL;
1925 }
1926 }
1927
1928
1929 static GLXWindow
1930 Fake_glXCreateWindow( Display *dpy, GLXFBConfig config, Window win,
1931 const int *attribList )
1932 {
1933 (void) dpy;
1934 (void) config;
1935 (void) win;
1936 (void) attribList; /* Ignored in GLX 1.3 */
1937
1938 return win; /* A hack for now */
1939 }
1940
1941
1942 static void
1943 Fake_glXDestroyWindow( Display *dpy, GLXWindow window )
1944 {
1945 XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable) window);
1946 if (b)
1947 XMesaDestroyBuffer(b);
1948 /* don't destroy X window */
1949 }
1950
1951
1952 /* XXX untested */
1953 static GLXPixmap
1954 Fake_glXCreatePixmap( Display *dpy, GLXFBConfig config, Pixmap pixmap,
1955 const int *attribList )
1956 {
1957 XMesaVisual v = (XMesaVisual) config;
1958 XMesaBuffer b;
1959
1960 (void) dpy;
1961 (void) config;
1962 (void) pixmap;
1963 (void) attribList; /* Ignored in GLX 1.3 */
1964
1965 if (!dpy || !config || !pixmap)
1966 return 0;
1967
1968 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1969 if (!b) {
1970 return 0;
1971 }
1972
1973 return pixmap;
1974 }
1975
1976
1977 static void
1978 Fake_glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1979 {
1980 XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable)pixmap);
1981 if (b)
1982 XMesaDestroyBuffer(b);
1983 /* don't destroy X pixmap */
1984 }
1985
1986
1987 static GLXPbuffer
1988 Fake_glXCreatePbuffer( Display *dpy, GLXFBConfig config,
1989 const int *attribList )
1990 {
1991 XMesaVisual xmvis = (XMesaVisual) config;
1992 XMesaBuffer xmbuf;
1993 const int *attrib;
1994 int width = 0, height = 0;
1995 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1996
1997 (void) dpy;
1998
1999 for (attrib = attribList; *attrib; attrib++) {
2000 switch (*attrib) {
2001 case GLX_PBUFFER_WIDTH:
2002 attrib++;
2003 width = *attrib;
2004 break;
2005 case GLX_PBUFFER_HEIGHT:
2006 attrib++;
2007 height = *attrib;
2008 break;
2009 case GLX_PRESERVED_CONTENTS:
2010 attrib++;
2011 preserveContents = *attrib; /* ignored */
2012 break;
2013 case GLX_LARGEST_PBUFFER:
2014 attrib++;
2015 useLargest = *attrib; /* ignored */
2016 break;
2017 default:
2018 return 0;
2019 }
2020 }
2021
2022 if (width == 0 || height == 0)
2023 return 0;
2024
2025 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2026 /* A GLXPbuffer handle must be an X Drawable because that's what
2027 * glXMakeCurrent takes.
2028 */
2029 return (GLXPbuffer) xmbuf->frontbuffer;
2030 }
2031
2032
2033 static void
2034 Fake_glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2035 {
2036 XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2037 if (b) {
2038 XMesaDestroyBuffer(b);
2039 }
2040 }
2041
2042
2043 static void
2044 Fake_glXQueryDrawable( Display *dpy, GLXDrawable draw, int attribute,
2045 unsigned int *value )
2046 {
2047 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2048 if (!xmbuf)
2049 return;
2050
2051 switch (attribute) {
2052 case GLX_WIDTH:
2053 *value = xmbuf->width;
2054 break;
2055 case GLX_HEIGHT:
2056 *value = xmbuf->height;
2057 break;
2058 case GLX_PRESERVED_CONTENTS:
2059 *value = True;
2060 break;
2061 case GLX_LARGEST_PBUFFER:
2062 *value = xmbuf->width * xmbuf->height;
2063 break;
2064 case GLX_FBCONFIG_ID:
2065 *value = xmbuf->xm_visual->visinfo->visualid;
2066 return;
2067 default:
2068 return; /* GLX_BAD_ATTRIBUTE? */
2069 }
2070 }
2071
2072
2073 static GLXContext
2074 Fake_glXCreateNewContext( Display *dpy, GLXFBConfig config,
2075 int renderType, GLXContext shareList, Bool direct )
2076 {
2077 struct fake_glx_context *glxCtx;
2078 struct fake_glx_context *shareCtx = (struct fake_glx_context *) shareList;
2079 XMesaVisual xmvis = (XMesaVisual) config;
2080
2081 if (!dpy || !config ||
2082 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2083 return 0;
2084
2085 glxCtx = CALLOC_STRUCT(fake_glx_context);
2086 if (!glxCtx)
2087 return 0;
2088
2089 /* deallocate unused windows/buffers */
2090 XMesaGarbageCollect();
2091
2092 glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2093 shareCtx ? shareCtx->xmesaContext : NULL);
2094 if (!glxCtx->xmesaContext) {
2095 FREE(glxCtx);
2096 return NULL;
2097 }
2098
2099 glxCtx->xmesaContext->direct = GL_FALSE;
2100 glxCtx->glxContext.isDirect = GL_FALSE;
2101 glxCtx->glxContext.currentDpy = dpy;
2102 glxCtx->glxContext.xid = (XID) glxCtx; /* self pointer */
2103
2104 assert((void *) glxCtx == (void *) &(glxCtx->glxContext));
2105
2106 return (GLXContext) glxCtx;
2107 }
2108
2109
2110 static int
2111 Fake_glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2112 {
2113 struct fake_glx_context *glxCtx = (struct fake_glx_context *) ctx;
2114 XMesaContext xmctx = glxCtx->xmesaContext;
2115
2116 (void) dpy;
2117 (void) ctx;
2118
2119 switch (attribute) {
2120 case GLX_FBCONFIG_ID:
2121 *value = xmctx->xm_visual->visinfo->visualid;
2122 break;
2123 case GLX_RENDER_TYPE:
2124 if (xmctx->xm_visual->mesa_visual.rgbMode)
2125 *value = GLX_RGBA_BIT;
2126 else
2127 *value = GLX_COLOR_INDEX_BIT;
2128 break;
2129 case GLX_SCREEN:
2130 *value = 0;
2131 return Success;
2132 default:
2133 return GLX_BAD_ATTRIBUTE;
2134 }
2135 return 0;
2136 }
2137
2138
2139 static void
2140 Fake_glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2141 {
2142 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2143 if (xmbuf)
2144 xmbuf->selectedEvents = mask;
2145 }
2146
2147
2148 static void
2149 Fake_glXGetSelectedEvent( Display *dpy, GLXDrawable drawable,
2150 unsigned long *mask )
2151 {
2152 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2153 if (xmbuf)
2154 *mask = xmbuf->selectedEvents;
2155 else
2156 *mask = 0;
2157 }
2158
2159
2160
2161 /*** GLX_SGI_swap_control ***/
2162
2163 static int
2164 Fake_glXSwapIntervalSGI(int interval)
2165 {
2166 (void) interval;
2167 return 0;
2168 }
2169
2170
2171
2172 /*** GLX_SGI_video_sync ***/
2173
2174 static int
2175 Fake_glXGetVideoSyncSGI(unsigned int *count)
2176 {
2177 (void) count;
2178 return 0;
2179 }
2180
2181 static int
2182 Fake_glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2183 {
2184 (void) divisor;
2185 (void) remainder;
2186 (void) count;
2187 return 0;
2188 }
2189
2190
2191
2192 /*** GLX_SGI_make_current_read ***/
2193
2194 static Bool
2195 Fake_glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
2196 {
2197 return Fake_glXMakeContextCurrent( dpy, draw, read, ctx );
2198 }
2199
2200 /* not used
2201 static GLXDrawable
2202 Fake_glXGetCurrentReadDrawableSGI(void)
2203 {
2204 return 0;
2205 }
2206 */
2207
2208
2209 /*** GLX_SGIX_video_source ***/
2210 #if defined(_VL_H)
2211
2212 static GLXVideoSourceSGIX
2213 Fake_glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode)
2214 {
2215 (void) dpy;
2216 (void) screen;
2217 (void) server;
2218 (void) path;
2219 (void) nodeClass;
2220 (void) drainNode;
2221 return 0;
2222 }
2223
2224 static void
2225 Fake_glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2226 {
2227 (void) dpy;
2228 (void) src;
2229 }
2230
2231 #endif
2232
2233
2234 /*** GLX_EXT_import_context ***/
2235
2236 static void
2237 Fake_glXFreeContextEXT(Display *dpy, GLXContext context)
2238 {
2239 (void) dpy;
2240 (void) context;
2241 }
2242
2243 static GLXContextID
2244 Fake_glXGetContextIDEXT(const GLXContext context)
2245 {
2246 (void) context;
2247 return 0;
2248 }
2249
2250 static GLXContext
2251 Fake_glXImportContextEXT(Display *dpy, GLXContextID contextID)
2252 {
2253 (void) dpy;
2254 (void) contextID;
2255 return 0;
2256 }
2257
2258 static int
2259 Fake_glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute, int *value)
2260 {
2261 (void) dpy;
2262 (void) context;
2263 (void) attribute;
2264 (void) value;
2265 return 0;
2266 }
2267
2268
2269
2270 /*** GLX_SGIX_fbconfig ***/
2271
2272 static int
2273 Fake_glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
2274 {
2275 return Fake_glXGetFBConfigAttrib(dpy, config, attribute, value);
2276 }
2277
2278 static GLXFBConfigSGIX *
2279 Fake_glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list, int *nelements)
2280 {
2281 return (GLXFBConfig *) Fake_glXChooseFBConfig(dpy, screen, attrib_list, nelements);
2282 }
2283
2284
2285 static GLXPixmap
2286 Fake_glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap)
2287 {
2288 XMesaVisual xmvis = (XMesaVisual) config;
2289 XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2290 return xmbuf->frontbuffer; /* need to return an X ID */
2291 }
2292
2293
2294 static GLXContext
2295 Fake_glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct)
2296 {
2297 XMesaVisual xmvis = (XMesaVisual) config;
2298 struct fake_glx_context *glxCtx;
2299 struct fake_glx_context *shareCtx = (struct fake_glx_context *) share_list;
2300
2301 glxCtx = CALLOC_STRUCT(fake_glx_context);
2302 if (!glxCtx)
2303 return 0;
2304
2305 /* deallocate unused windows/buffers */
2306 XMesaGarbageCollect();
2307
2308 glxCtx->xmesaContext = XMesaCreateContext(xmvis,
2309 shareCtx ? shareCtx->xmesaContext : NULL);
2310 if (!glxCtx->xmesaContext) {
2311 FREE(glxCtx);
2312 return NULL;
2313 }
2314
2315 glxCtx->xmesaContext->direct = GL_FALSE;
2316 glxCtx->glxContext.isDirect = GL_FALSE;
2317 glxCtx->glxContext.currentDpy = dpy;
2318 glxCtx->glxContext.xid = (XID) glxCtx; /* self pointer */
2319
2320 assert((void *) glxCtx == (void *) &(glxCtx->glxContext));
2321
2322 return (GLXContext) glxCtx;
2323 }
2324
2325
2326 static XVisualInfo *
2327 Fake_glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2328 {
2329 return Fake_glXGetVisualFromFBConfig(dpy, config);
2330 }
2331
2332
2333 static GLXFBConfigSGIX
2334 Fake_glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2335 {
2336 XMesaVisual xmvis = find_glx_visual(dpy, vis);
2337 if (!xmvis) {
2338 /* This visual wasn't found with glXChooseVisual() */
2339 xmvis = create_glx_visual(dpy, vis);
2340 }
2341
2342 return (GLXFBConfigSGIX) xmvis;
2343 }
2344
2345
2346
2347 /*** GLX_SGIX_pbuffer ***/
2348
2349 static GLXPbufferSGIX
2350 Fake_glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2351 unsigned int width, unsigned int height,
2352 int *attribList)
2353 {
2354 XMesaVisual xmvis = (XMesaVisual) config;
2355 XMesaBuffer xmbuf;
2356 const int *attrib;
2357 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2358
2359 (void) dpy;
2360
2361 for (attrib = attribList; *attrib; attrib++) {
2362 switch (*attrib) {
2363 case GLX_PRESERVED_CONTENTS_SGIX:
2364 attrib++;
2365 preserveContents = *attrib; /* ignored */
2366 break;
2367 case GLX_LARGEST_PBUFFER_SGIX:
2368 attrib++;
2369 useLargest = *attrib; /* ignored */
2370 break;
2371 default:
2372 return 0;
2373 }
2374 }
2375
2376 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2377 /* A GLXPbuffer handle must be an X Drawable because that's what
2378 * glXMakeCurrent takes.
2379 */
2380 return (GLXPbuffer) xmbuf->frontbuffer;
2381 }
2382
2383
2384 static void
2385 Fake_glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2386 {
2387 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2388 if (xmbuf) {
2389 XMesaDestroyBuffer(xmbuf);
2390 }
2391 }
2392
2393
2394 static int
2395 Fake_glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value)
2396 {
2397 const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2398
2399 if (!xmbuf) {
2400 /* Generate GLXBadPbufferSGIX for bad pbuffer */
2401 return 0;
2402 }
2403
2404 switch (attribute) {
2405 case GLX_PRESERVED_CONTENTS_SGIX:
2406 *value = True;
2407 break;
2408 case GLX_LARGEST_PBUFFER_SGIX:
2409 *value = xmbuf->width * xmbuf->height;
2410 break;
2411 case GLX_WIDTH_SGIX:
2412 *value = xmbuf->width;
2413 break;
2414 case GLX_HEIGHT_SGIX:
2415 *value = xmbuf->height;
2416 break;
2417 case GLX_EVENT_MASK_SGIX:
2418 *value = 0; /* XXX might be wrong */
2419 break;
2420 default:
2421 *value = 0;
2422 }
2423 return 0;
2424 }
2425
2426
2427 static void
2428 Fake_glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2429 {
2430 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2431 if (xmbuf) {
2432 /* Note: we'll never generate clobber events */
2433 xmbuf->selectedEvents = mask;
2434 }
2435 }
2436
2437
2438 static void
2439 Fake_glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2440 {
2441 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2442 if (xmbuf) {
2443 *mask = xmbuf->selectedEvents;
2444 }
2445 else {
2446 *mask = 0;
2447 }
2448 }
2449
2450
2451
2452 /*** GLX_SGI_cushion ***/
2453
2454 static void
2455 Fake_glXCushionSGI(Display *dpy, Window win, float cushion)
2456 {
2457 (void) dpy;
2458 (void) win;
2459 (void) cushion;
2460 }
2461
2462
2463
2464 /*** GLX_SGIX_video_resize ***/
2465
2466 static int
2467 Fake_glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel , Window window)
2468 {
2469 (void) dpy;
2470 (void) screen;
2471 (void) channel;
2472 (void) window;
2473 return 0;
2474 }
2475
2476 static int
2477 Fake_glXChannelRectSGIX(Display *dpy, int screen, int channel, int x, int y, int w, int h)
2478 {
2479 (void) dpy;
2480 (void) screen;
2481 (void) channel;
2482 (void) x;
2483 (void) y;
2484 (void) w;
2485 (void) h;
2486 return 0;
2487 }
2488
2489 static int
2490 Fake_glXQueryChannelRectSGIX(Display *dpy, int screen, int channel, 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
2502 static int
2503 Fake_glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel, int *dx, int *dy, int *dw, int *dh)
2504 {
2505 (void) dpy;
2506 (void) screen;
2507 (void) channel;
2508 (void) dx;
2509 (void) dy;
2510 (void) dw;
2511 (void) dh;
2512 return 0;
2513 }
2514
2515 static int
2516 Fake_glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2517 {
2518 (void) dpy;
2519 (void) screen;
2520 (void) channel;
2521 (void) synctype;
2522 return 0;
2523 }
2524
2525
2526
2527 /*** GLX_SGIX_dmbuffer **/
2528
2529 #if defined(_DM_BUFFER_H_)
2530 static Bool
2531 Fake_glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer)
2532 {
2533 (void) dpy;
2534 (void) pbuffer;
2535 (void) params;
2536 (void) dmbuffer;
2537 return False;
2538 }
2539 #endif
2540
2541
2542 /*** GLX_SGIX_swap_group ***/
2543
2544 static void
2545 Fake_glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2546 {
2547 (void) dpy;
2548 (void) drawable;
2549 (void) member;
2550 }
2551
2552
2553
2554 /*** GLX_SGIX_swap_barrier ***/
2555
2556 static void
2557 Fake_glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2558 {
2559 (void) dpy;
2560 (void) drawable;
2561 (void) barrier;
2562 }
2563
2564 static Bool
2565 Fake_glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2566 {
2567 (void) dpy;
2568 (void) screen;
2569 (void) max;
2570 return False;
2571 }
2572
2573
2574
2575 /*** GLX_SUN_get_transparent_index ***/
2576
2577 static Status
2578 Fake_glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay, long *pTransparent)
2579 {
2580 (void) dpy;
2581 (void) overlay;
2582 (void) underlay;
2583 (void) pTransparent;
2584 return 0;
2585 }
2586
2587
2588
2589 /*** GLX_MESA_release_buffers ***/
2590
2591 /*
2592 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2593 * (a window or pixmap) prior to destroying the GLXDrawable.
2594 */
2595 static Bool
2596 Fake_glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2597 {
2598 XMesaBuffer b = XMesaFindBuffer(dpy, d);
2599 if (b) {
2600 XMesaDestroyBuffer(b);
2601 return True;
2602 }
2603 return False;
2604 }
2605
2606
2607
2608 /*** GLX_MESA_set_3dfx_mode ***/
2609
2610 static Bool
2611 Fake_glXSet3DfxModeMESA( int mode )
2612 {
2613 return XMesaSetFXmode( mode );
2614 }
2615
2616
2617
2618 /*** AGP memory allocation ***/
2619 static void *
2620 Fake_glXAllocateMemoryNV( GLsizei size,
2621 GLfloat readFrequency,
2622 GLfloat writeFrequency,
2623 GLfloat priority )
2624 {
2625 (void) size;
2626 (void) readFrequency;
2627 (void) writeFrequency;
2628 (void) priority;
2629 return NULL;
2630 }
2631
2632
2633 static void
2634 Fake_glXFreeMemoryNV( GLvoid *pointer )
2635 {
2636 (void) pointer;
2637 }
2638
2639
2640
2641 extern struct _glxapi_table *_mesa_GetGLXDispatchTable(void);
2642 struct _glxapi_table *_mesa_GetGLXDispatchTable(void)
2643 {
2644 static struct _glxapi_table glx;
2645
2646 /* be sure our dispatch table size <= libGL's table */
2647 {
2648 GLuint size = sizeof(struct _glxapi_table) / sizeof(void *);
2649 (void) size;
2650 assert(_glxapi_get_dispatch_table_size() >= size);
2651 }
2652
2653 /* initialize the whole table to no-ops */
2654 _glxapi_set_no_op_table(&glx);
2655
2656 /* now initialize the table with the functions I implement */
2657 glx.ChooseVisual = Fake_glXChooseVisual;
2658 glx.CopyContext = Fake_glXCopyContext;
2659 glx.CreateContext = Fake_glXCreateContext;
2660 glx.CreateGLXPixmap = Fake_glXCreateGLXPixmap;
2661 glx.DestroyContext = Fake_glXDestroyContext;
2662 glx.DestroyGLXPixmap = Fake_glXDestroyGLXPixmap;
2663 glx.GetConfig = Fake_glXGetConfig;
2664 /*glx.GetCurrentContext = Fake_glXGetCurrentContext;*/
2665 /*glx.GetCurrentDrawable = Fake_glXGetCurrentDrawable;*/
2666 glx.IsDirect = Fake_glXIsDirect;
2667 glx.MakeCurrent = Fake_glXMakeCurrent;
2668 glx.QueryExtension = Fake_glXQueryExtension;
2669 glx.QueryVersion = Fake_glXQueryVersion;
2670 glx.SwapBuffers = Fake_glXSwapBuffers;
2671 glx.UseXFont = Fake_glXUseXFont;
2672 glx.WaitGL = Fake_glXWaitGL;
2673 glx.WaitX = Fake_glXWaitX;
2674
2675 /*** GLX_VERSION_1_1 ***/
2676 glx.GetClientString = Fake_glXGetClientString;
2677 glx.QueryExtensionsString = Fake_glXQueryExtensionsString;
2678 glx.QueryServerString = Fake_glXQueryServerString;
2679
2680 /*** GLX_VERSION_1_2 ***/
2681 /*glx.GetCurrentDisplay = Fake_glXGetCurrentDisplay;*/
2682
2683 /*** GLX_VERSION_1_3 ***/
2684 glx.ChooseFBConfig = Fake_glXChooseFBConfig;
2685 glx.CreateNewContext = Fake_glXCreateNewContext;
2686 glx.CreatePbuffer = Fake_glXCreatePbuffer;
2687 glx.CreatePixmap = Fake_glXCreatePixmap;
2688 glx.CreateWindow = Fake_glXCreateWindow;
2689 glx.DestroyPbuffer = Fake_glXDestroyPbuffer;
2690 glx.DestroyPixmap = Fake_glXDestroyPixmap;
2691 glx.DestroyWindow = Fake_glXDestroyWindow;
2692 /*glx.GetCurrentReadDrawable = Fake_glXGetCurrentReadDrawable;*/
2693 glx.GetFBConfigAttrib = Fake_glXGetFBConfigAttrib;
2694 glx.GetFBConfigs = Fake_glXGetFBConfigs;
2695 glx.GetSelectedEvent = Fake_glXGetSelectedEvent;
2696 glx.GetVisualFromFBConfig = Fake_glXGetVisualFromFBConfig;
2697 glx.MakeContextCurrent = Fake_glXMakeContextCurrent;
2698 glx.QueryContext = Fake_glXQueryContext;
2699 glx.QueryDrawable = Fake_glXQueryDrawable;
2700 glx.SelectEvent = Fake_glXSelectEvent;
2701
2702 /*** GLX_SGI_swap_control ***/
2703 glx.SwapIntervalSGI = Fake_glXSwapIntervalSGI;
2704
2705 /*** GLX_SGI_video_sync ***/
2706 glx.GetVideoSyncSGI = Fake_glXGetVideoSyncSGI;
2707 glx.WaitVideoSyncSGI = Fake_glXWaitVideoSyncSGI;
2708
2709 /*** GLX_SGI_make_current_read ***/
2710 glx.MakeCurrentReadSGI = Fake_glXMakeCurrentReadSGI;
2711 /*glx.GetCurrentReadDrawableSGI = Fake_glXGetCurrentReadDrawableSGI;*/
2712
2713 /*** GLX_SGIX_video_source ***/
2714 #if defined(_VL_H)
2715 glx.CreateGLXVideoSourceSGIX = Fake_glXCreateGLXVideoSourceSGIX;
2716 glx.DestroyGLXVideoSourceSGIX = Fake_glXDestroyGLXVideoSourceSGIX;
2717 #endif
2718
2719 /*** GLX_EXT_import_context ***/
2720 glx.FreeContextEXT = Fake_glXFreeContextEXT;
2721 glx.GetContextIDEXT = Fake_glXGetContextIDEXT;
2722 /*glx.GetCurrentDisplayEXT = Fake_glXGetCurrentDisplayEXT;*/
2723 glx.ImportContextEXT = Fake_glXImportContextEXT;
2724 glx.QueryContextInfoEXT = Fake_glXQueryContextInfoEXT;
2725
2726 /*** GLX_SGIX_fbconfig ***/
2727 glx.GetFBConfigAttribSGIX = Fake_glXGetFBConfigAttribSGIX;
2728 glx.ChooseFBConfigSGIX = Fake_glXChooseFBConfigSGIX;
2729 glx.CreateGLXPixmapWithConfigSGIX = Fake_glXCreateGLXPixmapWithConfigSGIX;
2730 glx.CreateContextWithConfigSGIX = Fake_glXCreateContextWithConfigSGIX;
2731 glx.GetVisualFromFBConfigSGIX = Fake_glXGetVisualFromFBConfigSGIX;
2732 glx.GetFBConfigFromVisualSGIX = Fake_glXGetFBConfigFromVisualSGIX;
2733
2734 /*** GLX_SGIX_pbuffer ***/
2735 glx.CreateGLXPbufferSGIX = Fake_glXCreateGLXPbufferSGIX;
2736 glx.DestroyGLXPbufferSGIX = Fake_glXDestroyGLXPbufferSGIX;
2737 glx.QueryGLXPbufferSGIX = Fake_glXQueryGLXPbufferSGIX;
2738 glx.SelectEventSGIX = Fake_glXSelectEventSGIX;
2739 glx.GetSelectedEventSGIX = Fake_glXGetSelectedEventSGIX;
2740
2741 /*** GLX_SGI_cushion ***/
2742 glx.CushionSGI = Fake_glXCushionSGI;
2743
2744 /*** GLX_SGIX_video_resize ***/
2745 glx.BindChannelToWindowSGIX = Fake_glXBindChannelToWindowSGIX;
2746 glx.ChannelRectSGIX = Fake_glXChannelRectSGIX;
2747 glx.QueryChannelRectSGIX = Fake_glXQueryChannelRectSGIX;
2748 glx.QueryChannelDeltasSGIX = Fake_glXQueryChannelDeltasSGIX;
2749 glx.ChannelRectSyncSGIX = Fake_glXChannelRectSyncSGIX;
2750
2751 /*** GLX_SGIX_dmbuffer **/
2752 #if defined(_DM_BUFFER_H_)
2753 glx.AssociateDMPbufferSGIX = NULL;
2754 #endif
2755
2756 /*** GLX_SGIX_swap_group ***/
2757 glx.JoinSwapGroupSGIX = Fake_glXJoinSwapGroupSGIX;
2758
2759 /*** GLX_SGIX_swap_barrier ***/
2760 glx.BindSwapBarrierSGIX = Fake_glXBindSwapBarrierSGIX;
2761 glx.QueryMaxSwapBarriersSGIX = Fake_glXQueryMaxSwapBarriersSGIX;
2762
2763 /*** GLX_SUN_get_transparent_index ***/
2764 glx.GetTransparentIndexSUN = Fake_glXGetTransparentIndexSUN;
2765
2766 /*** GLX_MESA_copy_sub_buffer ***/
2767 glx.CopySubBufferMESA = Fake_glXCopySubBufferMESA;
2768
2769 /*** GLX_MESA_release_buffers ***/
2770 glx.ReleaseBuffersMESA = Fake_glXReleaseBuffersMESA;
2771
2772 /*** GLX_MESA_pixmap_colormap ***/
2773 glx.CreateGLXPixmapMESA = Fake_glXCreateGLXPixmapMESA;
2774
2775 /*** GLX_MESA_set_3dfx_mode ***/
2776 glx.Set3DfxModeMESA = Fake_glXSet3DfxModeMESA;
2777
2778 /*** GLX AGP memory allocation ***/
2779 glx.AllocateMemoryNV = Fake_glXAllocateMemoryNV;
2780 glx.FreeMemoryNV = Fake_glXFreeMemoryNV;
2781
2782 return &glx;
2783 }