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st/xlib: Do minimal version checking in glXCreateContextAttribsARB.
[mesa.git] / src / gallium / state_trackers / glx / xlib / glx_api.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
5 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /**
28 * "Fake" GLX API implemented in terms of the XMesa*() functions.
29 */
30
31
32
33 #define GLX_GLXEXT_PROTOTYPES
34 #include "GL/glx.h"
35
36 #include "xm_api.h"
37
38
39 /* This indicates the client-side GLX API and GLX encoder version. */
40 #define CLIENT_MAJOR_VERSION 1
41 #define CLIENT_MINOR_VERSION 4 /* but don't have 1.3's pbuffers, etc yet */
42
43 /* This indicates the server-side GLX decoder version.
44 * GLX 1.4 indicates OpenGL 1.3 support
45 */
46 #define SERVER_MAJOR_VERSION 1
47 #define SERVER_MINOR_VERSION 4
48
49 /* Who implemented this GLX? */
50 #define VENDOR "Brian Paul"
51
52 #define EXTENSIONS \
53 "GLX_MESA_copy_sub_buffer " \
54 "GLX_MESA_pixmap_colormap " \
55 "GLX_MESA_release_buffers " \
56 "GLX_ARB_create_context " \
57 "GLX_ARB_create_context_profile " \
58 "GLX_ARB_get_proc_address " \
59 "GLX_EXT_texture_from_pixmap " \
60 "GLX_EXT_visual_info " \
61 "GLX_EXT_visual_rating " \
62 /*"GLX_SGI_video_sync "*/ \
63 "GLX_SGIX_fbconfig " \
64 "GLX_SGIX_pbuffer "
65
66 #define DEFAULT_DIRECT GL_TRUE
67
68
69 /** XXX this could be based on gallium's max texture size */
70 #define PBUFFER_MAX_SIZE 16384
71
72
73 /**
74 * The GLXContext typedef is defined as a pointer to this structure.
75 */
76 struct __GLXcontextRec
77 {
78 Display *currentDpy;
79 GLboolean isDirect;
80 GLXDrawable currentDrawable;
81 GLXDrawable currentReadable;
82 XID xid;
83
84 XMesaContext xmesaContext;
85 };
86
87
88
89 static pipe_tsd ContextTSD;
90
91 /** Set current context for calling thread */
92 static void
93 SetCurrentContext(GLXContext c)
94 {
95 pipe_tsd_set(&ContextTSD, c);
96 }
97
98 /** Get current context for calling thread */
99 static GLXContext
100 GetCurrentContext(void)
101 {
102 return pipe_tsd_get(&ContextTSD);
103 }
104
105
106
107 /**********************************************************************/
108 /*** GLX Visual Code ***/
109 /**********************************************************************/
110
111 #define DONT_CARE -1
112
113
114 static XMesaVisual *VisualTable = NULL;
115 static int NumVisuals = 0;
116
117
118
119 /* Macro to handle c_class vs class field name in XVisualInfo struct */
120 #if defined(__cplusplus) || defined(c_plusplus)
121 #define CLASS c_class
122 #else
123 #define CLASS class
124 #endif
125
126
127
128 /*
129 * Test if the given XVisualInfo is usable for Mesa rendering.
130 */
131 static GLboolean
132 is_usable_visual( XVisualInfo *vinfo )
133 {
134 switch (vinfo->CLASS) {
135 case StaticGray:
136 case GrayScale:
137 /* Any StaticGray/GrayScale visual works in RGB or CI mode */
138 return GL_TRUE;
139 case StaticColor:
140 case PseudoColor:
141 /* Any StaticColor/PseudoColor visual of at least 4 bits */
142 if (vinfo->depth>=4) {
143 return GL_TRUE;
144 }
145 else {
146 return GL_FALSE;
147 }
148 case TrueColor:
149 case DirectColor:
150 /* Any depth of TrueColor or DirectColor works in RGB mode */
151 return GL_TRUE;
152 default:
153 /* This should never happen */
154 return GL_FALSE;
155 }
156 }
157
158
159 /*
160 * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
161 * configuration in our list of GLX visuals.
162 */
163 static XMesaVisual
164 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
165 GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
166 GLboolean stereoFlag,
167 GLint depth_size, GLint stencil_size,
168 GLint accumRedSize, GLint accumGreenSize,
169 GLint accumBlueSize, GLint accumAlphaSize,
170 GLint level, GLint numAuxBuffers )
171 {
172 GLboolean ximageFlag = GL_TRUE;
173 XMesaVisual xmvis;
174 GLint i;
175 GLboolean comparePointers;
176
177 if (dbFlag) {
178 /* Check if the MESA_BACK_BUFFER env var is set */
179 char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
180 if (backbuffer) {
181 if (backbuffer[0]=='p' || backbuffer[0]=='P') {
182 ximageFlag = GL_FALSE;
183 }
184 else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
185 ximageFlag = GL_TRUE;
186 }
187 else {
188 _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
189 }
190 }
191 }
192
193 if (stereoFlag) {
194 /* stereo not supported */
195 return NULL;
196 }
197
198 if (stencil_size > 0 && depth_size > 0)
199 depth_size = 24;
200
201 /* Comparing IDs uses less memory but sometimes fails. */
202 /* XXX revisit this after 3.0 is finished. */
203 if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
204 comparePointers = GL_TRUE;
205 else
206 comparePointers = GL_FALSE;
207
208 /* Force the visual to have an alpha channel */
209 if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
210 alphaFlag = GL_TRUE;
211
212 /* First check if a matching visual is already in the list */
213 for (i=0; i<NumVisuals; i++) {
214 XMesaVisual v = VisualTable[i];
215 if (v->display == dpy
216 && v->mesa_visual.level == level
217 && v->mesa_visual.numAuxBuffers == numAuxBuffers
218 && v->ximage_flag == ximageFlag
219 && v->mesa_visual.rgbMode == rgbFlag
220 && v->mesa_visual.doubleBufferMode == dbFlag
221 && v->mesa_visual.stereoMode == stereoFlag
222 && (v->mesa_visual.alphaBits > 0) == alphaFlag
223 && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
224 && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
225 && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
226 && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
227 && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
228 && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
229 /* now either compare XVisualInfo pointers or visual IDs */
230 if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
231 || (comparePointers && v->vishandle == vinfo)) {
232 return v;
233 }
234 }
235 }
236
237 /* Create a new visual and add it to the list. */
238
239 xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
240 stereoFlag, ximageFlag,
241 depth_size, stencil_size,
242 accumRedSize, accumBlueSize,
243 accumBlueSize, accumAlphaSize, 0, level,
244 GLX_NONE_EXT );
245 if (xmvis) {
246 /* Save a copy of the pointer now so we can find this visual again
247 * if we need to search for it in find_glx_visual().
248 */
249 xmvis->vishandle = vinfo;
250 /* Allocate more space for additional visual */
251 VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
252 sizeof(XMesaVisual) * NumVisuals,
253 sizeof(XMesaVisual) * (NumVisuals + 1));
254 /* add xmvis to the list */
255 VisualTable[NumVisuals] = xmvis;
256 NumVisuals++;
257 /* XXX minor hack, because XMesaCreateVisual doesn't support an
258 * aux buffers parameter.
259 */
260 xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
261 }
262 return xmvis;
263 }
264
265
266 /**
267 * Return the default number of bits for the Z buffer.
268 * If defined, use the MESA_GLX_DEPTH_BITS env var value.
269 * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
270 * XXX probably do the same thing for stencil, accum, etc.
271 */
272 static GLint
273 default_depth_bits(void)
274 {
275 int zBits;
276 const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
277 if (zEnv)
278 zBits = atoi(zEnv);
279 else
280 zBits = 24;
281 return zBits;
282 }
283
284 static GLint
285 default_alpha_bits(void)
286 {
287 int aBits;
288 const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
289 if (aEnv)
290 aBits = atoi(aEnv);
291 else
292 aBits = 0;
293 return aBits;
294 }
295
296 static GLint
297 default_accum_bits(void)
298 {
299 return 16;
300 }
301
302
303
304 /*
305 * Create a GLX visual from a regular XVisualInfo.
306 * This is called when Fake GLX is given an XVisualInfo which wasn't
307 * returned by glXChooseVisual. Since this is the first time we're
308 * considering this visual we'll take a guess at reasonable values
309 * for depth buffer size, stencil size, accum size, etc.
310 * This is the best we can do with a client-side emulation of GLX.
311 */
312 static XMesaVisual
313 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
314 {
315 GLint zBits = default_depth_bits();
316 GLint accBits = default_accum_bits();
317 GLboolean alphaFlag = default_alpha_bits() > 0;
318
319 if (is_usable_visual( visinfo )) {
320 /* Configure this visual as RGB, double-buffered, depth-buffered. */
321 /* This is surely wrong for some people's needs but what else */
322 /* can be done? They should use glXChooseVisual(). */
323 return save_glx_visual( dpy, visinfo,
324 GL_TRUE, /* rgb */
325 alphaFlag, /* alpha */
326 GL_TRUE, /* double */
327 GL_FALSE, /* stereo */
328 zBits,
329 8, /* stencil bits */
330 accBits, /* r */
331 accBits, /* g */
332 accBits, /* b */
333 accBits, /* a */
334 0, /* level */
335 0 /* numAux */
336 );
337 }
338 else {
339 _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
340 return NULL;
341 }
342 }
343
344
345
346 /*
347 * Find the GLX visual associated with an XVisualInfo.
348 */
349 static XMesaVisual
350 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
351 {
352 int i;
353
354 /* try to match visual id */
355 for (i=0;i<NumVisuals;i++) {
356 if (VisualTable[i]->display==dpy
357 && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
358 return VisualTable[i];
359 }
360 }
361
362 /* if that fails, try to match pointers */
363 for (i=0;i<NumVisuals;i++) {
364 if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
365 return VisualTable[i];
366 }
367 }
368
369 return NULL;
370 }
371
372
373 /**
374 * Try to get an X visual which matches the given arguments.
375 */
376 static XVisualInfo *
377 get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
378 {
379 XVisualInfo temp, *vis;
380 long mask;
381 int n;
382 unsigned int default_depth;
383 int default_class;
384
385 mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
386 temp.screen = scr;
387 temp.depth = depth;
388 temp.CLASS = xclass;
389
390 default_depth = DefaultDepth(dpy,scr);
391 default_class = DefaultVisual(dpy,scr)->CLASS;
392
393 if (depth==default_depth && xclass==default_class) {
394 /* try to get root window's visual */
395 temp.visualid = DefaultVisual(dpy,scr)->visualid;
396 mask |= VisualIDMask;
397 }
398
399 vis = XGetVisualInfo( dpy, mask, &temp, &n );
400
401 /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
402 * An SGI Infinite Reality system, for example, can have 30bpp pixels:
403 * 10 bits per color channel. Mesa's limited to a max of 8 bits/channel.
404 */
405 if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
406 if (_mesa_bitcount((GLuint) vis->red_mask ) <= 8 &&
407 _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
408 _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
409 return vis;
410 }
411 else {
412 free((void *) vis);
413 return NULL;
414 }
415 }
416
417 return vis;
418 }
419
420
421 /*
422 * Retrieve the value of the given environment variable and find
423 * the X visual which matches it.
424 * Input: dpy - the display
425 * screen - the screen number
426 * varname - the name of the environment variable
427 * Return: an XVisualInfo pointer to NULL if error.
428 */
429 static XVisualInfo *
430 get_env_visual(Display *dpy, int scr, const char *varname)
431 {
432 char value[100], type[100];
433 int depth, xclass = -1;
434 XVisualInfo *vis;
435
436 if (!_mesa_getenv( varname )) {
437 return NULL;
438 }
439
440 strncpy( value, _mesa_getenv(varname), 100 );
441 value[99] = 0;
442
443 sscanf( value, "%s %d", type, &depth );
444
445 if (strcmp(type,"TrueColor")==0) xclass = TrueColor;
446 else if (strcmp(type,"DirectColor")==0) xclass = DirectColor;
447 else if (strcmp(type,"PseudoColor")==0) xclass = PseudoColor;
448 else if (strcmp(type,"StaticColor")==0) xclass = StaticColor;
449 else if (strcmp(type,"GrayScale")==0) xclass = GrayScale;
450 else if (strcmp(type,"StaticGray")==0) xclass = StaticGray;
451
452 if (xclass>-1 && depth>0) {
453 vis = get_visual( dpy, scr, depth, xclass );
454 if (vis) {
455 return vis;
456 }
457 }
458
459 _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
460 type, depth);
461
462 return NULL;
463 }
464
465
466
467 /*
468 * Select an X visual which satisfies the RGBA flag and minimum depth.
469 * Input: dpy,
470 * screen - X display and screen number
471 * min_depth - minimum visual depth
472 * preferred_class - preferred GLX visual class or DONT_CARE
473 * Return: pointer to an XVisualInfo or NULL.
474 */
475 static XVisualInfo *
476 choose_x_visual( Display *dpy, int screen, int min_depth,
477 int preferred_class )
478 {
479 XVisualInfo *vis;
480 int xclass, visclass = 0;
481 int depth;
482
483 /* First see if the MESA_RGB_VISUAL env var is defined */
484 vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
485 if (vis) {
486 return vis;
487 }
488 /* Otherwise, search for a suitable visual */
489 if (preferred_class==DONT_CARE) {
490 for (xclass=0;xclass<6;xclass++) {
491 switch (xclass) {
492 case 0: visclass = TrueColor; break;
493 case 1: visclass = DirectColor; break;
494 case 2: visclass = PseudoColor; break;
495 case 3: visclass = StaticColor; break;
496 case 4: visclass = GrayScale; break;
497 case 5: visclass = StaticGray; break;
498 }
499 if (min_depth==0) {
500 /* start with shallowest */
501 for (depth=0;depth<=32;depth++) {
502 if (visclass==TrueColor && depth==8) {
503 /* Special case: try to get 8-bit PseudoColor before */
504 /* 8-bit TrueColor */
505 vis = get_visual( dpy, screen, 8, PseudoColor );
506 if (vis) {
507 return vis;
508 }
509 }
510 vis = get_visual( dpy, screen, depth, visclass );
511 if (vis) {
512 return vis;
513 }
514 }
515 }
516 else {
517 /* start with deepest */
518 for (depth=32;depth>=min_depth;depth--) {
519 if (visclass==TrueColor && depth==8) {
520 /* Special case: try to get 8-bit PseudoColor before */
521 /* 8-bit TrueColor */
522 vis = get_visual( dpy, screen, 8, PseudoColor );
523 if (vis) {
524 return vis;
525 }
526 }
527 vis = get_visual( dpy, screen, depth, visclass );
528 if (vis) {
529 return vis;
530 }
531 }
532 }
533 }
534 }
535 else {
536 /* search for a specific visual class */
537 switch (preferred_class) {
538 case GLX_TRUE_COLOR_EXT: visclass = TrueColor; break;
539 case GLX_DIRECT_COLOR_EXT: visclass = DirectColor; break;
540 case GLX_PSEUDO_COLOR_EXT: visclass = PseudoColor; break;
541 case GLX_STATIC_COLOR_EXT: visclass = StaticColor; break;
542 case GLX_GRAY_SCALE_EXT: visclass = GrayScale; break;
543 case GLX_STATIC_GRAY_EXT: visclass = StaticGray; break;
544 default: return NULL;
545 }
546 if (min_depth==0) {
547 /* start with shallowest */
548 for (depth=0;depth<=32;depth++) {
549 vis = get_visual( dpy, screen, depth, visclass );
550 if (vis) {
551 return vis;
552 }
553 }
554 }
555 else {
556 /* start with deepest */
557 for (depth=32;depth>=min_depth;depth--) {
558 vis = get_visual( dpy, screen, depth, visclass );
559 if (vis) {
560 return vis;
561 }
562 }
563 }
564 }
565
566 /* didn't find a visual */
567 return NULL;
568 }
569
570
571
572
573 /**********************************************************************/
574 /*** Display-related functions ***/
575 /**********************************************************************/
576
577
578 /**
579 * Free all XMesaVisuals which are associated with the given display.
580 */
581 static void
582 destroy_visuals_on_display(Display *dpy)
583 {
584 int i;
585 for (i = 0; i < NumVisuals; i++) {
586 if (VisualTable[i]->display == dpy) {
587 /* remove this visual */
588 int j;
589 free(VisualTable[i]);
590 for (j = i; j < NumVisuals - 1; j++)
591 VisualTable[j] = VisualTable[j + 1];
592 NumVisuals--;
593 }
594 }
595 }
596
597
598 /**
599 * Called from XCloseDisplay() to let us free our display-related data.
600 */
601 static int
602 close_display_callback(Display *dpy, XExtCodes *codes)
603 {
604 xmesa_destroy_buffers_on_display(dpy);
605 destroy_visuals_on_display(dpy);
606 return 0;
607 }
608
609
610 /**
611 * Look for the named extension on given display and return a pointer
612 * to the _XExtension data, or NULL if extension not found.
613 */
614 static _XExtension *
615 lookup_extension(Display *dpy, const char *extName)
616 {
617 _XExtension *ext;
618 for (ext = dpy->ext_procs; ext; ext = ext->next) {
619 if (ext->name && strcmp(ext->name, extName) == 0) {
620 return ext;
621 }
622 }
623 return NULL;
624 }
625
626
627 /**
628 * Whenever we're given a new Display pointer, call this function to
629 * register our close_display_callback function.
630 */
631 static void
632 register_with_display(Display *dpy)
633 {
634 const char *extName = "MesaGLX";
635 _XExtension *ext;
636
637 ext = lookup_extension(dpy, extName);
638 if (!ext) {
639 XExtCodes *c = XAddExtension(dpy);
640 ext = dpy->ext_procs; /* new extension is at head of list */
641 assert(c->extension == ext->codes.extension);
642 (void) c;
643 ext->name = _mesa_strdup(extName);
644 ext->close_display = close_display_callback;
645 }
646 }
647
648
649 /**********************************************************************/
650 /*** Begin Fake GLX API Functions ***/
651 /**********************************************************************/
652
653
654 /**
655 * Helper used by glXChooseVisual and glXChooseFBConfig.
656 * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
657 * the later.
658 * In either case, the attribute list is terminated with the value 'None'.
659 */
660 static XMesaVisual
661 choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
662 {
663 const GLboolean rgbModeDefault = fbConfig;
664 const int *parselist;
665 XVisualInfo *vis;
666 int min_red=0, min_green=0, min_blue=0;
667 GLboolean rgb_flag = rgbModeDefault;
668 GLboolean alpha_flag = GL_FALSE;
669 GLboolean double_flag = GL_FALSE;
670 GLboolean stereo_flag = GL_FALSE;
671 GLint depth_size = 0;
672 GLint stencil_size = 0;
673 GLint accumRedSize = 0;
674 GLint accumGreenSize = 0;
675 GLint accumBlueSize = 0;
676 GLint accumAlphaSize = 0;
677 int level = 0;
678 int visual_type = DONT_CARE;
679 GLint caveat = DONT_CARE;
680 XMesaVisual xmvis = NULL;
681 int desiredVisualID = -1;
682 int numAux = 0;
683
684 xmesa_init( dpy );
685
686 parselist = list;
687
688 while (*parselist) {
689
690 if (fbConfig &&
691 parselist[1] == GLX_DONT_CARE &&
692 parselist[0] != GLX_LEVEL) {
693 /* For glXChooseFBConfig(), skip attributes whose value is
694 * GLX_DONT_CARE, unless it's GLX_LEVEL (which can legitimately be
695 * a negative value).
696 *
697 * From page 17 (23 of the pdf) of the GLX 1.4 spec:
698 * GLX DONT CARE may be specified for all attributes except GLX LEVEL.
699 */
700 parselist += 2;
701 continue;
702 }
703
704 switch (*parselist) {
705 case GLX_USE_GL:
706 if (fbConfig) {
707 /* invalid token */
708 return NULL;
709 }
710 else {
711 /* skip */
712 parselist++;
713 }
714 break;
715 case GLX_BUFFER_SIZE:
716 parselist++;
717 parselist++;
718 break;
719 case GLX_LEVEL:
720 parselist++;
721 level = *parselist++;
722 break;
723 case GLX_RGBA:
724 if (fbConfig) {
725 /* invalid token */
726 return NULL;
727 }
728 else {
729 rgb_flag = GL_TRUE;
730 parselist++;
731 }
732 break;
733 case GLX_DOUBLEBUFFER:
734 parselist++;
735 if (fbConfig) {
736 double_flag = *parselist++;
737 }
738 else {
739 double_flag = GL_TRUE;
740 }
741 break;
742 case GLX_STEREO:
743 parselist++;
744 if (fbConfig) {
745 stereo_flag = *parselist++;
746 }
747 else {
748 stereo_flag = GL_TRUE;
749 }
750 break;
751 case GLX_AUX_BUFFERS:
752 parselist++;
753 numAux = *parselist++;
754 if (numAux > MAX_AUX_BUFFERS)
755 return NULL;
756 break;
757 case GLX_RED_SIZE:
758 parselist++;
759 min_red = *parselist++;
760 break;
761 case GLX_GREEN_SIZE:
762 parselist++;
763 min_green = *parselist++;
764 break;
765 case GLX_BLUE_SIZE:
766 parselist++;
767 min_blue = *parselist++;
768 break;
769 case GLX_ALPHA_SIZE:
770 parselist++;
771 {
772 GLint size = *parselist++;
773 alpha_flag = size ? GL_TRUE : GL_FALSE;
774 }
775 break;
776 case GLX_DEPTH_SIZE:
777 parselist++;
778 depth_size = *parselist++;
779 break;
780 case GLX_STENCIL_SIZE:
781 parselist++;
782 stencil_size = *parselist++;
783 break;
784 case GLX_ACCUM_RED_SIZE:
785 parselist++;
786 {
787 GLint size = *parselist++;
788 accumRedSize = MAX2( accumRedSize, size );
789 }
790 break;
791 case GLX_ACCUM_GREEN_SIZE:
792 parselist++;
793 {
794 GLint size = *parselist++;
795 accumGreenSize = MAX2( accumGreenSize, size );
796 }
797 break;
798 case GLX_ACCUM_BLUE_SIZE:
799 parselist++;
800 {
801 GLint size = *parselist++;
802 accumBlueSize = MAX2( accumBlueSize, size );
803 }
804 break;
805 case GLX_ACCUM_ALPHA_SIZE:
806 parselist++;
807 {
808 GLint size = *parselist++;
809 accumAlphaSize = MAX2( accumAlphaSize, size );
810 }
811 break;
812
813 /*
814 * GLX_EXT_visual_info extension
815 */
816 case GLX_X_VISUAL_TYPE_EXT:
817 parselist++;
818 visual_type = *parselist++;
819 break;
820 case GLX_TRANSPARENT_TYPE_EXT:
821 parselist++;
822 parselist++;
823 break;
824 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
825 parselist++;
826 parselist++;
827 break;
828 case GLX_TRANSPARENT_RED_VALUE_EXT:
829 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
830 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
831 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
832 /* ignore */
833 parselist++;
834 parselist++;
835 break;
836
837 /*
838 * GLX_EXT_visual_info extension
839 */
840 case GLX_VISUAL_CAVEAT_EXT:
841 parselist++;
842 caveat = *parselist++; /* ignored for now */
843 break;
844
845 /*
846 * GLX_ARB_multisample
847 */
848 case GLX_SAMPLE_BUFFERS_ARB:
849 case GLX_SAMPLES_ARB:
850 parselist++;
851 if (*parselist++ != 0) {
852 /* ms not supported */
853 return NULL;
854 }
855 break;
856
857 /*
858 * FBConfig attribs.
859 */
860 case GLX_RENDER_TYPE:
861 if (!fbConfig)
862 return NULL;
863 parselist++;
864 if (*parselist & GLX_RGBA_BIT) {
865 rgb_flag = GL_TRUE;
866 }
867 else if (*parselist & GLX_COLOR_INDEX_BIT) {
868 rgb_flag = GL_FALSE;
869 }
870 else if (*parselist == 0) {
871 rgb_flag = GL_TRUE;
872 }
873 parselist++;
874 break;
875 case GLX_DRAWABLE_TYPE:
876 if (!fbConfig)
877 return NULL;
878 parselist++;
879 if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
880 return NULL; /* bad bit */
881 }
882 parselist++;
883 break;
884 case GLX_FBCONFIG_ID:
885 case GLX_VISUAL_ID:
886 if (!fbConfig)
887 return NULL;
888 parselist++;
889 desiredVisualID = *parselist++;
890 break;
891 case GLX_X_RENDERABLE:
892 case GLX_MAX_PBUFFER_WIDTH:
893 case GLX_MAX_PBUFFER_HEIGHT:
894 case GLX_MAX_PBUFFER_PIXELS:
895 if (!fbConfig)
896 return NULL; /* invalid config option */
897 parselist += 2; /* ignore the parameter */
898 break;
899
900 #ifdef GLX_EXT_texture_from_pixmap
901 case GLX_BIND_TO_TEXTURE_RGB_EXT:
902 parselist++; /*skip*/
903 break;
904 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
905 parselist++; /*skip*/
906 break;
907 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
908 parselist++; /*skip*/
909 break;
910 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
911 parselist++;
912 if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
913 GLX_TEXTURE_2D_BIT_EXT |
914 GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
915 /* invalid bit */
916 return NULL;
917 }
918 break;
919 case GLX_Y_INVERTED_EXT:
920 parselist++; /*skip*/
921 break;
922 #endif
923
924 case None:
925 /* end of list */
926 break;
927
928 default:
929 /* undefined attribute */
930 _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
931 *parselist);
932 return NULL;
933 }
934 }
935
936 (void) caveat;
937
938
939 /*
940 * Since we're only simulating the GLX extension this function will never
941 * find any real GL visuals. Instead, all we can do is try to find an RGB
942 * or CI visual of appropriate depth. Other requested attributes such as
943 * double buffering, depth buffer, etc. will be associated with the X
944 * visual and stored in the VisualTable[].
945 */
946 if (desiredVisualID != -1) {
947 /* try to get a specific visual, by visualID */
948 XVisualInfo temp;
949 int n;
950 temp.visualid = desiredVisualID;
951 temp.screen = screen;
952 vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
953 if (vis) {
954 /* give the visual some useful GLX attributes */
955 double_flag = GL_TRUE;
956 rgb_flag = GL_TRUE;
957 }
958 }
959 else if (level==0) {
960 /* normal color planes */
961 /* Get an RGB visual */
962 int min_rgb = min_red + min_green + min_blue;
963 if (min_rgb>1 && min_rgb<8) {
964 /* a special case to be sure we can get a monochrome visual */
965 min_rgb = 1;
966 }
967 vis = choose_x_visual( dpy, screen, min_rgb, visual_type );
968 }
969 else {
970 _mesa_warning(NULL, "overlay not supported");
971 return NULL;
972 }
973
974 if (vis) {
975 /* Note: we're not exactly obeying the glXChooseVisual rules here.
976 * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
977 * largest depth buffer size, which is 32bits/value. Instead, we
978 * return 16 to maintain performance with earlier versions of Mesa.
979 */
980 if (stencil_size > 0)
981 depth_size = 24; /* if Z and stencil, always use 24+8 format */
982 else if (depth_size > 24)
983 depth_size = 32;
984 else if (depth_size > 16)
985 depth_size = 24;
986 else if (depth_size > 0) {
987 depth_size = default_depth_bits();
988 }
989
990 if (!alpha_flag) {
991 alpha_flag = default_alpha_bits() > 0;
992 }
993
994 /* we only support one size of stencil and accum buffers. */
995 if (stencil_size > 0)
996 stencil_size = 8;
997
998 if (accumRedSize > 0 ||
999 accumGreenSize > 0 ||
1000 accumBlueSize > 0 ||
1001 accumAlphaSize > 0) {
1002
1003 accumRedSize =
1004 accumGreenSize =
1005 accumBlueSize = default_accum_bits();
1006
1007 accumAlphaSize = alpha_flag ? accumRedSize : 0;
1008 }
1009
1010 xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
1011 stereo_flag, depth_size, stencil_size,
1012 accumRedSize, accumGreenSize,
1013 accumBlueSize, accumAlphaSize, level, numAux );
1014 }
1015
1016 return xmvis;
1017 }
1018
1019
1020 PUBLIC XVisualInfo *
1021 glXChooseVisual( Display *dpy, int screen, int *list )
1022 {
1023 XMesaVisual xmvis;
1024
1025 /* register ourselves as an extension on this display */
1026 register_with_display(dpy);
1027
1028 xmvis = choose_visual(dpy, screen, list, GL_FALSE);
1029 if (xmvis) {
1030 /* create a new vishandle - the cached one may be stale */
1031 xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1032 if (xmvis->vishandle) {
1033 memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1034 }
1035 return xmvis->vishandle;
1036 }
1037 else
1038 return NULL;
1039 }
1040
1041
1042 /**
1043 * Helper function used by other glXCreateContext functions.
1044 */
1045 static GLXContext
1046 create_context(Display *dpy, XMesaVisual xmvis,
1047 XMesaContext shareCtx, Bool direct,
1048 unsigned major, unsigned minor,
1049 unsigned profileMask, unsigned contextFlags)
1050 {
1051 GLXContext glxCtx;
1052
1053 if (!dpy || !xmvis)
1054 return 0;
1055
1056 glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1057 if (!glxCtx)
1058 return 0;
1059
1060 /* deallocate unused windows/buffers */
1061 #if 0
1062 XMesaGarbageCollect();
1063 #endif
1064
1065 glxCtx->xmesaContext = XMesaCreateContext(xmvis, shareCtx, major, minor,
1066 profileMask, contextFlags);
1067 if (!glxCtx->xmesaContext) {
1068 free(glxCtx);
1069 return NULL;
1070 }
1071
1072 glxCtx->isDirect = DEFAULT_DIRECT;
1073 glxCtx->currentDpy = dpy;
1074 glxCtx->xid = (XID) glxCtx; /* self pointer */
1075
1076 return glxCtx;
1077 }
1078
1079
1080 PUBLIC GLXContext
1081 glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1082 GLXContext shareCtx, Bool direct )
1083 {
1084 XMesaVisual xmvis;
1085
1086 xmvis = find_glx_visual( dpy, visinfo );
1087 if (!xmvis) {
1088 /* This visual wasn't found with glXChooseVisual() */
1089 xmvis = create_glx_visual( dpy, visinfo );
1090 if (!xmvis) {
1091 /* unusable visual */
1092 return NULL;
1093 }
1094 }
1095
1096 return create_context(dpy, xmvis,
1097 shareCtx ? shareCtx->xmesaContext : NULL,
1098 direct,
1099 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
1100 }
1101
1102
1103 /* XXX these may have to be removed due to thread-safety issues. */
1104 static GLXContext MakeCurrent_PrevContext = 0;
1105 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1106 static GLXDrawable MakeCurrent_PrevReadable = 0;
1107 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1108 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1109
1110
1111 /* GLX 1.3 and later */
1112 PUBLIC Bool
1113 glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1114 GLXDrawable read, GLXContext ctx )
1115 {
1116 GLXContext glxCtx = ctx;
1117 static boolean firsttime = 1, no_rast = 0;
1118
1119 if (firsttime) {
1120 no_rast = getenv("SP_NO_RAST") != NULL;
1121 firsttime = 0;
1122 }
1123
1124 if (ctx && draw && read) {
1125 XMesaBuffer drawBuffer, readBuffer;
1126 XMesaContext xmctx = glxCtx->xmesaContext;
1127
1128 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1129 if (ctx == MakeCurrent_PrevContext
1130 && draw == MakeCurrent_PrevDrawable) {
1131 drawBuffer = MakeCurrent_PrevDrawBuffer;
1132 }
1133 else {
1134 drawBuffer = XMesaFindBuffer( dpy, draw );
1135 }
1136 if (!drawBuffer) {
1137 /* drawable must be a new window! */
1138 drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1139 if (!drawBuffer) {
1140 /* Out of memory, or context/drawable depth mismatch */
1141 return False;
1142 }
1143 }
1144
1145 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1146 if (ctx == MakeCurrent_PrevContext
1147 && read == MakeCurrent_PrevReadable) {
1148 readBuffer = MakeCurrent_PrevReadBuffer;
1149 }
1150 else {
1151 readBuffer = XMesaFindBuffer( dpy, read );
1152 }
1153 if (!readBuffer) {
1154 /* drawable must be a new window! */
1155 readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1156 if (!readBuffer) {
1157 /* Out of memory, or context/drawable depth mismatch */
1158 return False;
1159 }
1160 }
1161
1162 if (no_rast &&
1163 MakeCurrent_PrevContext == ctx &&
1164 MakeCurrent_PrevDrawable == draw &&
1165 MakeCurrent_PrevReadable == read &&
1166 MakeCurrent_PrevDrawBuffer == drawBuffer &&
1167 MakeCurrent_PrevReadBuffer == readBuffer)
1168 return True;
1169
1170 MakeCurrent_PrevContext = ctx;
1171 MakeCurrent_PrevDrawable = draw;
1172 MakeCurrent_PrevReadable = read;
1173 MakeCurrent_PrevDrawBuffer = drawBuffer;
1174 MakeCurrent_PrevReadBuffer = readBuffer;
1175
1176 /* Now make current! */
1177 if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1178 ctx->currentDpy = dpy;
1179 ctx->currentDrawable = draw;
1180 ctx->currentReadable = read;
1181 SetCurrentContext(ctx);
1182 return True;
1183 }
1184 else {
1185 return False;
1186 }
1187 }
1188 else if (!ctx && !draw && !read) {
1189 /* release current context w/out assigning new one. */
1190 XMesaMakeCurrent2( NULL, NULL, NULL );
1191 MakeCurrent_PrevContext = 0;
1192 MakeCurrent_PrevDrawable = 0;
1193 MakeCurrent_PrevReadable = 0;
1194 MakeCurrent_PrevDrawBuffer = 0;
1195 MakeCurrent_PrevReadBuffer = 0;
1196 SetCurrentContext(NULL);
1197 return True;
1198 }
1199 else {
1200 /* The args must either all be non-zero or all zero.
1201 * This is an error.
1202 */
1203 return False;
1204 }
1205 }
1206
1207
1208 PUBLIC Bool
1209 glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1210 {
1211 return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1212 }
1213
1214
1215 PUBLIC GLXContext
1216 glXGetCurrentContext(void)
1217 {
1218 return GetCurrentContext();
1219 }
1220
1221
1222 PUBLIC Display *
1223 glXGetCurrentDisplay(void)
1224 {
1225 GLXContext glxCtx = glXGetCurrentContext();
1226
1227 return glxCtx ? glxCtx->currentDpy : NULL;
1228 }
1229
1230
1231 PUBLIC Display *
1232 glXGetCurrentDisplayEXT(void)
1233 {
1234 return glXGetCurrentDisplay();
1235 }
1236
1237
1238 PUBLIC GLXDrawable
1239 glXGetCurrentDrawable(void)
1240 {
1241 GLXContext gc = glXGetCurrentContext();
1242 return gc ? gc->currentDrawable : 0;
1243 }
1244
1245
1246 PUBLIC GLXDrawable
1247 glXGetCurrentReadDrawable(void)
1248 {
1249 GLXContext gc = glXGetCurrentContext();
1250 return gc ? gc->currentReadable : 0;
1251 }
1252
1253
1254 PUBLIC GLXDrawable
1255 glXGetCurrentReadDrawableSGI(void)
1256 {
1257 return glXGetCurrentReadDrawable();
1258 }
1259
1260
1261 PUBLIC GLXPixmap
1262 glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1263 {
1264 XMesaVisual v;
1265 XMesaBuffer b;
1266
1267 v = find_glx_visual( dpy, visinfo );
1268 if (!v) {
1269 v = create_glx_visual( dpy, visinfo );
1270 if (!v) {
1271 /* unusable visual */
1272 return 0;
1273 }
1274 }
1275
1276 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1277 if (!b) {
1278 return 0;
1279 }
1280 return b->ws.drawable;
1281 }
1282
1283
1284 /*** GLX_MESA_pixmap_colormap ***/
1285
1286 PUBLIC GLXPixmap
1287 glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1288 Pixmap pixmap, Colormap cmap )
1289 {
1290 XMesaVisual v;
1291 XMesaBuffer b;
1292
1293 v = find_glx_visual( dpy, visinfo );
1294 if (!v) {
1295 v = create_glx_visual( dpy, visinfo );
1296 if (!v) {
1297 /* unusable visual */
1298 return 0;
1299 }
1300 }
1301
1302 b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1303 if (!b) {
1304 return 0;
1305 }
1306 return b->ws.drawable;
1307 }
1308
1309
1310 PUBLIC void
1311 glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1312 {
1313 XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1314 if (b) {
1315 XMesaDestroyBuffer(b);
1316 }
1317 else if (_mesa_getenv("MESA_DEBUG")) {
1318 _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1319 }
1320 }
1321
1322
1323 PUBLIC void
1324 glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1325 unsigned long mask )
1326 {
1327 XMesaContext xm_src = src->xmesaContext;
1328 XMesaContext xm_dst = dst->xmesaContext;
1329 (void) dpy;
1330 if (MakeCurrent_PrevContext == src) {
1331 glFlush();
1332 }
1333 XMesaCopyContext(xm_src, xm_dst, mask);
1334 }
1335
1336
1337 PUBLIC Bool
1338 glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1339 {
1340 int op, ev, err;
1341 /* Mesa's GLX isn't really an X extension but we try to act like one. */
1342 if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1343 ev = err = 0;
1344 if (errorBase)
1345 *errorBase = err;
1346 if (eventBase)
1347 *eventBase = ev;
1348 return True; /* we're faking GLX so always return success */
1349 }
1350
1351
1352 PUBLIC void
1353 glXDestroyContext( Display *dpy, GLXContext ctx )
1354 {
1355 if (ctx) {
1356 GLXContext glxCtx = ctx;
1357 (void) dpy;
1358 MakeCurrent_PrevContext = 0;
1359 MakeCurrent_PrevDrawable = 0;
1360 MakeCurrent_PrevReadable = 0;
1361 MakeCurrent_PrevDrawBuffer = 0;
1362 MakeCurrent_PrevReadBuffer = 0;
1363 XMesaDestroyContext( glxCtx->xmesaContext );
1364 XMesaGarbageCollect();
1365 free(glxCtx);
1366 }
1367 }
1368
1369
1370 PUBLIC Bool
1371 glXIsDirect( Display *dpy, GLXContext ctx )
1372 {
1373 return ctx ? ctx->isDirect : False;
1374 }
1375
1376
1377
1378 PUBLIC void
1379 glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1380 {
1381 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1382 static boolean firsttime = 1, no_rast = 0;
1383
1384 if (firsttime) {
1385 no_rast = getenv("SP_NO_RAST") != NULL;
1386 firsttime = 0;
1387 }
1388
1389 if (no_rast)
1390 return;
1391
1392 if (buffer) {
1393 XMesaSwapBuffers(buffer);
1394 }
1395 else if (_mesa_getenv("MESA_DEBUG")) {
1396 _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1397 (int) drawable);
1398 }
1399 }
1400
1401
1402
1403 /*** GLX_MESA_copy_sub_buffer ***/
1404
1405 PUBLIC void
1406 glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
1407 int x, int y, int width, int height)
1408 {
1409 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1410 if (buffer) {
1411 XMesaCopySubBuffer(buffer, x, y, width, height);
1412 }
1413 else if (_mesa_getenv("MESA_DEBUG")) {
1414 _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1415 }
1416 }
1417
1418
1419 PUBLIC Bool
1420 glXQueryVersion( Display *dpy, int *maj, int *min )
1421 {
1422 (void) dpy;
1423 /* Return GLX version, not Mesa version */
1424 assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1425 *maj = CLIENT_MAJOR_VERSION;
1426 *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1427 return True;
1428 }
1429
1430
1431 /*
1432 * Query the GLX attributes of the given XVisualInfo.
1433 */
1434 static int
1435 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1436 {
1437 ASSERT(xmvis);
1438 switch(attrib) {
1439 case GLX_USE_GL:
1440 if (fbconfig)
1441 return GLX_BAD_ATTRIBUTE;
1442 *value = (int) True;
1443 return 0;
1444 case GLX_BUFFER_SIZE:
1445 *value = xmvis->visinfo->depth;
1446 return 0;
1447 case GLX_LEVEL:
1448 *value = xmvis->mesa_visual.level;
1449 return 0;
1450 case GLX_RGBA:
1451 if (fbconfig)
1452 return GLX_BAD_ATTRIBUTE;
1453 if (xmvis->mesa_visual.rgbMode) {
1454 *value = True;
1455 }
1456 else {
1457 *value = False;
1458 }
1459 return 0;
1460 case GLX_DOUBLEBUFFER:
1461 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1462 return 0;
1463 case GLX_STEREO:
1464 *value = (int) xmvis->mesa_visual.stereoMode;
1465 return 0;
1466 case GLX_AUX_BUFFERS:
1467 *value = xmvis->mesa_visual.numAuxBuffers;
1468 return 0;
1469 case GLX_RED_SIZE:
1470 *value = xmvis->mesa_visual.redBits;
1471 return 0;
1472 case GLX_GREEN_SIZE:
1473 *value = xmvis->mesa_visual.greenBits;
1474 return 0;
1475 case GLX_BLUE_SIZE:
1476 *value = xmvis->mesa_visual.blueBits;
1477 return 0;
1478 case GLX_ALPHA_SIZE:
1479 *value = xmvis->mesa_visual.alphaBits;
1480 return 0;
1481 case GLX_DEPTH_SIZE:
1482 *value = xmvis->mesa_visual.depthBits;
1483 return 0;
1484 case GLX_STENCIL_SIZE:
1485 *value = xmvis->mesa_visual.stencilBits;
1486 return 0;
1487 case GLX_ACCUM_RED_SIZE:
1488 *value = xmvis->mesa_visual.accumRedBits;
1489 return 0;
1490 case GLX_ACCUM_GREEN_SIZE:
1491 *value = xmvis->mesa_visual.accumGreenBits;
1492 return 0;
1493 case GLX_ACCUM_BLUE_SIZE:
1494 *value = xmvis->mesa_visual.accumBlueBits;
1495 return 0;
1496 case GLX_ACCUM_ALPHA_SIZE:
1497 *value = xmvis->mesa_visual.accumAlphaBits;
1498 return 0;
1499
1500 /*
1501 * GLX_EXT_visual_info extension
1502 */
1503 case GLX_X_VISUAL_TYPE_EXT:
1504 switch (xmvis->visinfo->CLASS) {
1505 case StaticGray: *value = GLX_STATIC_GRAY_EXT; return 0;
1506 case GrayScale: *value = GLX_GRAY_SCALE_EXT; return 0;
1507 case StaticColor: *value = GLX_STATIC_GRAY_EXT; return 0;
1508 case PseudoColor: *value = GLX_PSEUDO_COLOR_EXT; return 0;
1509 case TrueColor: *value = GLX_TRUE_COLOR_EXT; return 0;
1510 case DirectColor: *value = GLX_DIRECT_COLOR_EXT; return 0;
1511 }
1512 return 0;
1513 case GLX_TRANSPARENT_TYPE_EXT:
1514 /* normal planes */
1515 *value = GLX_NONE_EXT;
1516 return 0;
1517 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1518 /* undefined */
1519 return 0;
1520 case GLX_TRANSPARENT_RED_VALUE_EXT:
1521 /* undefined */
1522 return 0;
1523 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1524 /* undefined */
1525 return 0;
1526 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1527 /* undefined */
1528 return 0;
1529 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1530 /* undefined */
1531 return 0;
1532
1533 /*
1534 * GLX_EXT_visual_info extension
1535 */
1536 case GLX_VISUAL_CAVEAT_EXT:
1537 /* test for zero, just in case */
1538 if (xmvis->mesa_visual.visualRating > 0)
1539 *value = xmvis->mesa_visual.visualRating;
1540 else
1541 *value = GLX_NONE_EXT;
1542 return 0;
1543
1544 /*
1545 * GLX_ARB_multisample
1546 */
1547 case GLX_SAMPLE_BUFFERS_ARB:
1548 *value = 0;
1549 return 0;
1550 case GLX_SAMPLES_ARB:
1551 *value = 0;
1552 return 0;
1553
1554 /*
1555 * For FBConfigs:
1556 */
1557 case GLX_SCREEN_EXT:
1558 if (!fbconfig)
1559 return GLX_BAD_ATTRIBUTE;
1560 *value = xmvis->visinfo->screen;
1561 break;
1562 case GLX_DRAWABLE_TYPE: /*SGIX too */
1563 if (!fbconfig)
1564 return GLX_BAD_ATTRIBUTE;
1565 *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1566 break;
1567 case GLX_RENDER_TYPE_SGIX:
1568 if (!fbconfig)
1569 return GLX_BAD_ATTRIBUTE;
1570 if (xmvis->mesa_visual.rgbMode)
1571 *value = GLX_RGBA_BIT;
1572 else
1573 *value = GLX_COLOR_INDEX_BIT;
1574 break;
1575 case GLX_X_RENDERABLE_SGIX:
1576 if (!fbconfig)
1577 return GLX_BAD_ATTRIBUTE;
1578 *value = True; /* XXX really? */
1579 break;
1580 case GLX_FBCONFIG_ID_SGIX:
1581 if (!fbconfig)
1582 return GLX_BAD_ATTRIBUTE;
1583 *value = xmvis->visinfo->visualid;
1584 break;
1585 case GLX_MAX_PBUFFER_WIDTH:
1586 if (!fbconfig)
1587 return GLX_BAD_ATTRIBUTE;
1588 /* XXX or MAX_WIDTH? */
1589 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1590 break;
1591 case GLX_MAX_PBUFFER_HEIGHT:
1592 if (!fbconfig)
1593 return GLX_BAD_ATTRIBUTE;
1594 *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1595 break;
1596 case GLX_MAX_PBUFFER_PIXELS:
1597 if (!fbconfig)
1598 return GLX_BAD_ATTRIBUTE;
1599 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1600 DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1601 break;
1602 case GLX_VISUAL_ID:
1603 if (!fbconfig)
1604 return GLX_BAD_ATTRIBUTE;
1605 *value = xmvis->visinfo->visualid;
1606 break;
1607
1608 #ifdef GLX_EXT_texture_from_pixmap
1609 case GLX_BIND_TO_TEXTURE_RGB_EXT:
1610 *value = True; /*XXX*/
1611 break;
1612 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1613 /* XXX review */
1614 *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1615 break;
1616 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1617 *value = True; /*XXX*/
1618 break;
1619 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1620 *value = (GLX_TEXTURE_1D_BIT_EXT |
1621 GLX_TEXTURE_2D_BIT_EXT |
1622 GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1623 break;
1624 case GLX_Y_INVERTED_EXT:
1625 *value = True; /*XXX*/
1626 break;
1627 #endif
1628
1629 default:
1630 return GLX_BAD_ATTRIBUTE;
1631 }
1632 return Success;
1633 }
1634
1635
1636 PUBLIC int
1637 glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1638 int attrib, int *value )
1639 {
1640 XMesaVisual xmvis;
1641 int k;
1642 if (!dpy || !visinfo)
1643 return GLX_BAD_ATTRIBUTE;
1644
1645 xmvis = find_glx_visual( dpy, visinfo );
1646 if (!xmvis) {
1647 /* this visual wasn't obtained with glXChooseVisual */
1648 xmvis = create_glx_visual( dpy, visinfo );
1649 if (!xmvis) {
1650 /* this visual can't be used for GL rendering */
1651 if (attrib==GLX_USE_GL) {
1652 *value = (int) False;
1653 return 0;
1654 }
1655 else {
1656 return GLX_BAD_VISUAL;
1657 }
1658 }
1659 }
1660
1661 k = get_config(xmvis, attrib, value, GL_FALSE);
1662 return k;
1663 }
1664
1665
1666 PUBLIC void
1667 glXWaitGL( void )
1668 {
1669 XMesaContext xmesa = XMesaGetCurrentContext();
1670 XMesaFlush( xmesa );
1671 }
1672
1673
1674
1675 PUBLIC void
1676 glXWaitX( void )
1677 {
1678 XMesaContext xmesa = XMesaGetCurrentContext();
1679 XMesaFlush( xmesa );
1680 }
1681
1682
1683 static const char *
1684 get_extensions( void )
1685 {
1686 return EXTENSIONS;
1687 }
1688
1689
1690
1691 /* GLX 1.1 and later */
1692 PUBLIC const char *
1693 glXQueryExtensionsString( Display *dpy, int screen )
1694 {
1695 (void) dpy;
1696 (void) screen;
1697 return get_extensions();
1698 }
1699
1700
1701
1702 /* GLX 1.1 and later */
1703 PUBLIC const char *
1704 glXQueryServerString( Display *dpy, int screen, int name )
1705 {
1706 static char version[1000];
1707 sprintf(version, "%d.%d %s",
1708 SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
1709
1710 (void) dpy;
1711 (void) screen;
1712
1713 switch (name) {
1714 case GLX_EXTENSIONS:
1715 return get_extensions();
1716 case GLX_VENDOR:
1717 return VENDOR;
1718 case GLX_VERSION:
1719 return version;
1720 default:
1721 return NULL;
1722 }
1723 }
1724
1725
1726
1727 /* GLX 1.1 and later */
1728 PUBLIC const char *
1729 glXGetClientString( Display *dpy, int name )
1730 {
1731 static char version[1000];
1732 sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1733 CLIENT_MINOR_VERSION, xmesa_get_name());
1734
1735 (void) dpy;
1736
1737 switch (name) {
1738 case GLX_EXTENSIONS:
1739 return get_extensions();
1740 case GLX_VENDOR:
1741 return VENDOR;
1742 case GLX_VERSION:
1743 return version;
1744 default:
1745 return NULL;
1746 }
1747 }
1748
1749
1750
1751 /*
1752 * GLX 1.3 and later
1753 */
1754
1755
1756 PUBLIC int
1757 glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
1758 int attribute, int *value)
1759 {
1760 XMesaVisual v = (XMesaVisual) config;
1761 (void) dpy;
1762 (void) config;
1763
1764 if (!dpy || !config || !value)
1765 return -1;
1766
1767 return get_config(v, attribute, value, GL_TRUE);
1768 }
1769
1770
1771 PUBLIC GLXFBConfig *
1772 glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1773 {
1774 XVisualInfo *visuals, visTemplate;
1775 const long visMask = VisualScreenMask;
1776 int i;
1777
1778 /* Get list of all X visuals */
1779 visTemplate.screen = screen;
1780 visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1781 if (*nelements > 0) {
1782 XMesaVisual *results;
1783 results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1784 if (!results) {
1785 *nelements = 0;
1786 return NULL;
1787 }
1788 for (i = 0; i < *nelements; i++) {
1789 results[i] = create_glx_visual(dpy, visuals + i);
1790 if (!results[i]) {
1791 *nelements = i;
1792 break;
1793 }
1794 }
1795 return (GLXFBConfig *) results;
1796 }
1797 return NULL;
1798 }
1799
1800
1801 PUBLIC GLXFBConfig *
1802 glXChooseFBConfig(Display *dpy, int screen,
1803 const int *attribList, int *nitems)
1804 {
1805 XMesaVisual xmvis;
1806
1807 /* register ourselves as an extension on this display */
1808 register_with_display(dpy);
1809
1810 if (!attribList || !attribList[0]) {
1811 /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1812 return glXGetFBConfigs(dpy, screen, nitems);
1813 }
1814
1815 xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1816 if (xmvis) {
1817 GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1818 if (!config) {
1819 *nitems = 0;
1820 return NULL;
1821 }
1822 *nitems = 1;
1823 config[0] = (GLXFBConfig) xmvis;
1824 return (GLXFBConfig *) config;
1825 }
1826 else {
1827 *nitems = 0;
1828 return NULL;
1829 }
1830 }
1831
1832
1833 PUBLIC XVisualInfo *
1834 glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1835 {
1836 if (dpy && config) {
1837 XMesaVisual xmvis = (XMesaVisual) config;
1838 #if 0
1839 return xmvis->vishandle;
1840 #else
1841 /* create a new vishandle - the cached one may be stale */
1842 xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1843 if (xmvis->vishandle) {
1844 memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1845 }
1846 return xmvis->vishandle;
1847 #endif
1848 }
1849 else {
1850 return NULL;
1851 }
1852 }
1853
1854
1855 PUBLIC GLXWindow
1856 glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
1857 const int *attribList)
1858 {
1859 XMesaVisual xmvis = (XMesaVisual) config;
1860 XMesaBuffer xmbuf;
1861 if (!xmvis)
1862 return 0;
1863
1864 xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1865 if (!xmbuf)
1866 return 0;
1867
1868 (void) dpy;
1869 (void) attribList; /* Ignored in GLX 1.3 */
1870
1871 return win; /* A hack for now */
1872 }
1873
1874
1875 PUBLIC void
1876 glXDestroyWindow( Display *dpy, GLXWindow window )
1877 {
1878 XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1879 if (b)
1880 XMesaDestroyBuffer(b);
1881 /* don't destroy X window */
1882 }
1883
1884
1885 /* XXX untested */
1886 PUBLIC GLXPixmap
1887 glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
1888 const int *attribList)
1889 {
1890 XMesaVisual v = (XMesaVisual) config;
1891 XMesaBuffer b;
1892 const int *attr;
1893 int target = 0, format = 0, mipmap = 0;
1894 int value;
1895
1896 if (!dpy || !config || !pixmap)
1897 return 0;
1898
1899 for (attr = attribList; attr && *attr; attr++) {
1900 switch (*attr) {
1901 case GLX_TEXTURE_FORMAT_EXT:
1902 attr++;
1903 switch (*attr) {
1904 case GLX_TEXTURE_FORMAT_NONE_EXT:
1905 case GLX_TEXTURE_FORMAT_RGB_EXT:
1906 case GLX_TEXTURE_FORMAT_RGBA_EXT:
1907 format = *attr;
1908 break;
1909 default:
1910 /* error */
1911 return 0;
1912 }
1913 break;
1914 case GLX_TEXTURE_TARGET_EXT:
1915 attr++;
1916 switch (*attr) {
1917 case GLX_TEXTURE_1D_EXT:
1918 case GLX_TEXTURE_2D_EXT:
1919 case GLX_TEXTURE_RECTANGLE_EXT:
1920 target = *attr;
1921 break;
1922 default:
1923 /* error */
1924 return 0;
1925 }
1926 break;
1927 case GLX_MIPMAP_TEXTURE_EXT:
1928 attr++;
1929 if (*attr)
1930 mipmap = 1;
1931 break;
1932 default:
1933 /* error */
1934 return 0;
1935 }
1936 }
1937
1938 if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1939 if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1940 &value, GL_TRUE) != Success
1941 || !value) {
1942 return 0; /* error! */
1943 }
1944 }
1945 else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1946 if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1947 &value, GL_TRUE) != Success
1948 || !value) {
1949 return 0; /* error! */
1950 }
1951 }
1952 if (mipmap) {
1953 if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1954 &value, GL_TRUE) != Success
1955 || !value) {
1956 return 0; /* error! */
1957 }
1958 }
1959 if (target == GLX_TEXTURE_1D_EXT) {
1960 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1961 &value, GL_TRUE) != Success
1962 || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1963 return 0; /* error! */
1964 }
1965 }
1966 else if (target == GLX_TEXTURE_2D_EXT) {
1967 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1968 &value, GL_TRUE) != Success
1969 || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1970 return 0; /* error! */
1971 }
1972 }
1973 if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1974 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1975 &value, GL_TRUE) != Success
1976 || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1977 return 0; /* error! */
1978 }
1979 }
1980
1981 if (format || target || mipmap) {
1982 /* texture from pixmap */
1983 b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1984 }
1985 else {
1986 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1987 }
1988 if (!b) {
1989 return 0;
1990 }
1991
1992 return pixmap;
1993 }
1994
1995
1996 PUBLIC void
1997 glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1998 {
1999 XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
2000 if (b)
2001 XMesaDestroyBuffer(b);
2002 /* don't destroy X pixmap */
2003 }
2004
2005
2006 PUBLIC GLXPbuffer
2007 glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
2008 {
2009 XMesaVisual xmvis = (XMesaVisual) config;
2010 XMesaBuffer xmbuf;
2011 const int *attrib;
2012 int width = 0, height = 0;
2013 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2014
2015 (void) dpy;
2016
2017 for (attrib = attribList; *attrib; attrib++) {
2018 switch (*attrib) {
2019 case GLX_PBUFFER_WIDTH:
2020 attrib++;
2021 width = *attrib;
2022 break;
2023 case GLX_PBUFFER_HEIGHT:
2024 attrib++;
2025 height = *attrib;
2026 break;
2027 case GLX_PRESERVED_CONTENTS:
2028 attrib++;
2029 preserveContents = *attrib;
2030 break;
2031 case GLX_LARGEST_PBUFFER:
2032 attrib++;
2033 useLargest = *attrib;
2034 break;
2035 default:
2036 return 0;
2037 }
2038 }
2039
2040 if (width == 0 || height == 0)
2041 return 0;
2042
2043 if (width > PBUFFER_MAX_SIZE || height > PBUFFER_MAX_SIZE) {
2044 /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2045 * allocate the largest possible buffer.
2046 */
2047 if (useLargest) {
2048 width = PBUFFER_MAX_SIZE;
2049 height = PBUFFER_MAX_SIZE;
2050 }
2051 }
2052
2053 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2054 /* A GLXPbuffer handle must be an X Drawable because that's what
2055 * glXMakeCurrent takes.
2056 */
2057 if (xmbuf) {
2058 xmbuf->largestPbuffer = useLargest;
2059 xmbuf->preservedContents = preserveContents;
2060 return (GLXPbuffer) xmbuf->ws.drawable;
2061 }
2062 else {
2063 return 0;
2064 }
2065 }
2066
2067
2068 PUBLIC void
2069 glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2070 {
2071 XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2072 if (b) {
2073 XMesaDestroyBuffer(b);
2074 }
2075 }
2076
2077
2078 PUBLIC void
2079 glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
2080 unsigned int *value)
2081 {
2082 GLuint width, height;
2083 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2084 if (!xmbuf)
2085 return;
2086
2087 /* make sure buffer's dimensions are up to date */
2088 xmesa_get_window_size(dpy, xmbuf, &width, &height);
2089
2090 switch (attribute) {
2091 case GLX_WIDTH:
2092 *value = width;
2093 break;
2094 case GLX_HEIGHT:
2095 *value = height;
2096 break;
2097 case GLX_PRESERVED_CONTENTS:
2098 *value = xmbuf->preservedContents;
2099 break;
2100 case GLX_LARGEST_PBUFFER:
2101 *value = xmbuf->largestPbuffer;
2102 break;
2103 case GLX_FBCONFIG_ID:
2104 *value = xmbuf->xm_visual->visinfo->visualid;
2105 return;
2106 #ifdef GLX_EXT_texture_from_pixmap
2107 case GLX_TEXTURE_FORMAT_EXT:
2108 *value = xmbuf->TextureFormat;
2109 break;
2110 case GLX_TEXTURE_TARGET_EXT:
2111 *value = xmbuf->TextureTarget;
2112 break;
2113 case GLX_MIPMAP_TEXTURE_EXT:
2114 *value = xmbuf->TextureMipmap;
2115 break;
2116 #endif
2117
2118 default:
2119 return; /* raise BadValue error */
2120 }
2121 }
2122
2123
2124 PUBLIC GLXContext
2125 glXCreateNewContext( Display *dpy, GLXFBConfig config,
2126 int renderType, GLXContext shareCtx, Bool direct )
2127 {
2128 XMesaVisual xmvis = (XMesaVisual) config;
2129
2130 if (!dpy || !config ||
2131 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2132 return 0;
2133
2134 return create_context(dpy, xmvis,
2135 shareCtx ? shareCtx->xmesaContext : NULL,
2136 direct,
2137 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2138 }
2139
2140
2141 PUBLIC int
2142 glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2143 {
2144 GLXContext glxCtx = ctx;
2145 XMesaContext xmctx = glxCtx->xmesaContext;
2146
2147 (void) dpy;
2148 (void) ctx;
2149
2150 switch (attribute) {
2151 case GLX_FBCONFIG_ID:
2152 *value = xmctx->xm_visual->visinfo->visualid;
2153 break;
2154 case GLX_RENDER_TYPE:
2155 if (xmctx->xm_visual->mesa_visual.rgbMode)
2156 *value = GLX_RGBA_TYPE;
2157 else
2158 *value = GLX_COLOR_INDEX_TYPE;
2159 break;
2160 case GLX_SCREEN:
2161 *value = 0;
2162 return Success;
2163 default:
2164 return GLX_BAD_ATTRIBUTE;
2165 }
2166 return 0;
2167 }
2168
2169
2170 PUBLIC void
2171 glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2172 {
2173 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2174 if (xmbuf)
2175 xmbuf->selectedEvents = mask;
2176 }
2177
2178
2179 PUBLIC void
2180 glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2181 {
2182 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2183 if (xmbuf)
2184 *mask = xmbuf->selectedEvents;
2185 else
2186 *mask = 0;
2187 }
2188
2189
2190
2191 /*** GLX_SGI_swap_control ***/
2192
2193 PUBLIC int
2194 glXSwapIntervalSGI(int interval)
2195 {
2196 (void) interval;
2197 return 0;
2198 }
2199
2200
2201
2202 /*** GLX_SGI_video_sync ***/
2203
2204 static unsigned int FrameCounter = 0;
2205
2206 PUBLIC int
2207 glXGetVideoSyncSGI(unsigned int *count)
2208 {
2209 /* this is a bogus implementation */
2210 *count = FrameCounter++;
2211 return 0;
2212 }
2213
2214 PUBLIC int
2215 glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2216 {
2217 if (divisor <= 0 || remainder < 0)
2218 return GLX_BAD_VALUE;
2219 /* this is a bogus implementation */
2220 FrameCounter++;
2221 while (FrameCounter % divisor != remainder)
2222 FrameCounter++;
2223 *count = FrameCounter;
2224 return 0;
2225 }
2226
2227
2228
2229 /*** GLX_SGI_make_current_read ***/
2230
2231 PUBLIC Bool
2232 glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
2233 GLXContext ctx)
2234 {
2235 return glXMakeContextCurrent( dpy, draw, read, ctx );
2236 }
2237
2238 /* not used
2239 static GLXDrawable
2240 glXGetCurrentReadDrawableSGI(void)
2241 {
2242 return 0;
2243 }
2244 */
2245
2246
2247 /*** GLX_SGIX_video_source ***/
2248 #if defined(_VL_H)
2249
2250 PUBLIC GLXVideoSourceSGIX
2251 glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
2252 VLPath path, int nodeClass, VLNode drainNode)
2253 {
2254 (void) dpy;
2255 (void) screen;
2256 (void) server;
2257 (void) path;
2258 (void) nodeClass;
2259 (void) drainNode;
2260 return 0;
2261 }
2262
2263 PUBLIC void
2264 glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2265 {
2266 (void) dpy;
2267 (void) src;
2268 }
2269
2270 #endif
2271
2272
2273 /*** GLX_EXT_import_context ***/
2274
2275 PUBLIC void
2276 glXFreeContextEXT(Display *dpy, GLXContext context)
2277 {
2278 (void) dpy;
2279 (void) context;
2280 }
2281
2282 PUBLIC GLXContextID
2283 glXGetContextIDEXT(const GLXContext context)
2284 {
2285 (void) context;
2286 return 0;
2287 }
2288
2289 PUBLIC GLXContext
2290 glXImportContextEXT(Display *dpy, GLXContextID contextID)
2291 {
2292 (void) dpy;
2293 (void) contextID;
2294 return 0;
2295 }
2296
2297 PUBLIC int
2298 glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
2299 int *value)
2300 {
2301 (void) dpy;
2302 (void) context;
2303 (void) attribute;
2304 (void) value;
2305 return 0;
2306 }
2307
2308
2309
2310 /*** GLX_SGIX_fbconfig ***/
2311
2312 PUBLIC int
2313 glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
2314 int attribute, int *value)
2315 {
2316 return glXGetFBConfigAttrib(dpy, config, attribute, value);
2317 }
2318
2319 PUBLIC GLXFBConfigSGIX *
2320 glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list,
2321 int *nelements)
2322 {
2323 return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
2324 attrib_list, nelements);
2325 }
2326
2327
2328 PUBLIC GLXPixmap
2329 glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2330 Pixmap pixmap)
2331 {
2332 XMesaVisual xmvis = (XMesaVisual) config;
2333 XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2334 return xmbuf->ws.drawable; /* need to return an X ID */
2335 }
2336
2337
2338 PUBLIC GLXContext
2339 glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2340 int renderType, GLXContext shareCtx,
2341 Bool direct)
2342 {
2343 XMesaVisual xmvis = (XMesaVisual) config;
2344
2345 if (!dpy || !config ||
2346 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2347 return 0;
2348
2349 return create_context(dpy, xmvis,
2350 shareCtx ? shareCtx->xmesaContext : NULL,
2351 direct,
2352 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2353 }
2354
2355
2356 PUBLIC XVisualInfo *
2357 glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2358 {
2359 return glXGetVisualFromFBConfig(dpy, config);
2360 }
2361
2362
2363 PUBLIC GLXFBConfigSGIX
2364 glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2365 {
2366 XMesaVisual xmvis = find_glx_visual(dpy, vis);
2367 if (!xmvis) {
2368 /* This visual wasn't found with glXChooseVisual() */
2369 xmvis = create_glx_visual(dpy, vis);
2370 }
2371
2372 return (GLXFBConfigSGIX) xmvis;
2373 }
2374
2375
2376
2377 /*** GLX_SGIX_pbuffer ***/
2378
2379 PUBLIC GLXPbufferSGIX
2380 glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2381 unsigned int width, unsigned int height,
2382 int *attribList)
2383 {
2384 XMesaVisual xmvis = (XMesaVisual) config;
2385 XMesaBuffer xmbuf;
2386 const int *attrib;
2387 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2388
2389 (void) dpy;
2390
2391 for (attrib = attribList; attrib && *attrib; attrib++) {
2392 switch (*attrib) {
2393 case GLX_PRESERVED_CONTENTS_SGIX:
2394 attrib++;
2395 preserveContents = *attrib; /* ignored */
2396 break;
2397 case GLX_LARGEST_PBUFFER_SGIX:
2398 attrib++;
2399 useLargest = *attrib; /* ignored */
2400 break;
2401 default:
2402 return 0;
2403 }
2404 }
2405
2406 /* not used at this time */
2407 (void) useLargest;
2408 (void) preserveContents;
2409
2410 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2411 /* A GLXPbuffer handle must be an X Drawable because that's what
2412 * glXMakeCurrent takes.
2413 */
2414 return (GLXPbuffer) xmbuf->ws.drawable;
2415 }
2416
2417
2418 PUBLIC void
2419 glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2420 {
2421 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2422 if (xmbuf) {
2423 XMesaDestroyBuffer(xmbuf);
2424 }
2425 }
2426
2427
2428 PUBLIC int
2429 glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
2430 unsigned int *value)
2431 {
2432 const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2433
2434 if (!xmbuf) {
2435 /* Generate GLXBadPbufferSGIX for bad pbuffer */
2436 return 0;
2437 }
2438
2439 switch (attribute) {
2440 case GLX_PRESERVED_CONTENTS_SGIX:
2441 *value = True;
2442 break;
2443 case GLX_LARGEST_PBUFFER_SGIX:
2444 *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2445 break;
2446 case GLX_WIDTH_SGIX:
2447 *value = xmesa_buffer_width(xmbuf);
2448 break;
2449 case GLX_HEIGHT_SGIX:
2450 *value = xmesa_buffer_height(xmbuf);
2451 break;
2452 case GLX_EVENT_MASK_SGIX:
2453 *value = 0; /* XXX might be wrong */
2454 break;
2455 default:
2456 *value = 0;
2457 }
2458 return 0;
2459 }
2460
2461
2462 PUBLIC void
2463 glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2464 {
2465 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2466 if (xmbuf) {
2467 /* Note: we'll never generate clobber events */
2468 xmbuf->selectedEvents = mask;
2469 }
2470 }
2471
2472
2473 PUBLIC void
2474 glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
2475 unsigned long *mask)
2476 {
2477 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2478 if (xmbuf) {
2479 *mask = xmbuf->selectedEvents;
2480 }
2481 else {
2482 *mask = 0;
2483 }
2484 }
2485
2486
2487
2488 /*** GLX_SGI_cushion ***/
2489
2490 PUBLIC void
2491 glXCushionSGI(Display *dpy, Window win, float cushion)
2492 {
2493 (void) dpy;
2494 (void) win;
2495 (void) cushion;
2496 }
2497
2498
2499
2500 /*** GLX_SGIX_video_resize ***/
2501
2502 PUBLIC int
2503 glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
2504 Window window)
2505 {
2506 (void) dpy;
2507 (void) screen;
2508 (void) channel;
2509 (void) window;
2510 return 0;
2511 }
2512
2513 PUBLIC int
2514 glXChannelRectSGIX(Display *dpy, int screen, int channel,
2515 int x, int y, int w, int h)
2516 {
2517 (void) dpy;
2518 (void) screen;
2519 (void) channel;
2520 (void) x;
2521 (void) y;
2522 (void) w;
2523 (void) h;
2524 return 0;
2525 }
2526
2527 PUBLIC int
2528 glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
2529 int *x, int *y, int *w, int *h)
2530 {
2531 (void) dpy;
2532 (void) screen;
2533 (void) channel;
2534 (void) x;
2535 (void) y;
2536 (void) w;
2537 (void) h;
2538 return 0;
2539 }
2540
2541 PUBLIC int
2542 glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
2543 int *dx, int *dy, int *dw, int *dh)
2544 {
2545 (void) dpy;
2546 (void) screen;
2547 (void) channel;
2548 (void) dx;
2549 (void) dy;
2550 (void) dw;
2551 (void) dh;
2552 return 0;
2553 }
2554
2555 PUBLIC int
2556 glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2557 {
2558 (void) dpy;
2559 (void) screen;
2560 (void) channel;
2561 (void) synctype;
2562 return 0;
2563 }
2564
2565
2566
2567 /*** GLX_SGIX_dmbuffer **/
2568
2569 #if defined(_DM_BUFFER_H_)
2570 PUBLIC Bool
2571 glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
2572 DMparams *params, DMbuffer dmbuffer)
2573 {
2574 (void) dpy;
2575 (void) pbuffer;
2576 (void) params;
2577 (void) dmbuffer;
2578 return False;
2579 }
2580 #endif
2581
2582
2583 /*** GLX_SGIX_swap_group ***/
2584
2585 PUBLIC void
2586 glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2587 {
2588 (void) dpy;
2589 (void) drawable;
2590 (void) member;
2591 }
2592
2593
2594
2595 /*** GLX_SGIX_swap_barrier ***/
2596
2597 PUBLIC void
2598 glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2599 {
2600 (void) dpy;
2601 (void) drawable;
2602 (void) barrier;
2603 }
2604
2605 PUBLIC Bool
2606 glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2607 {
2608 (void) dpy;
2609 (void) screen;
2610 (void) max;
2611 return False;
2612 }
2613
2614
2615
2616 /*** GLX_SUN_get_transparent_index ***/
2617
2618 PUBLIC Status
2619 glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
2620 long *pTransparent)
2621 {
2622 (void) dpy;
2623 (void) overlay;
2624 (void) underlay;
2625 (void) pTransparent;
2626 return 0;
2627 }
2628
2629
2630
2631 /*** GLX_MESA_release_buffers ***/
2632
2633 /*
2634 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2635 * (a window or pixmap) prior to destroying the GLXDrawable.
2636 */
2637 PUBLIC Bool
2638 glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2639 {
2640 XMesaBuffer b = XMesaFindBuffer(dpy, d);
2641 if (b) {
2642 XMesaDestroyBuffer(b);
2643 return True;
2644 }
2645 return False;
2646 }
2647
2648 /*** GLX_EXT_texture_from_pixmap ***/
2649
2650 PUBLIC void
2651 glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2652 const int *attrib_list)
2653 {
2654 XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2655 if (b)
2656 XMesaBindTexImage(dpy, b, buffer, attrib_list);
2657 }
2658
2659 PUBLIC void
2660 glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2661 {
2662 XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2663 if (b)
2664 XMesaReleaseTexImage(dpy, b, buffer);
2665 }
2666
2667
2668
2669 /*** GLX_ARB_create_context ***/
2670
2671 GLXContext
2672 glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
2673 GLXContext shareCtx, Bool direct,
2674 const int *attrib_list)
2675 {
2676 XMesaVisual xmvis = (XMesaVisual) config;
2677 int majorVersion = 1, minorVersion = 0;
2678 int contextFlags = 0x0;
2679 int profileMask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
2680 int renderType = GLX_RGBA_TYPE;
2681 unsigned i;
2682 Bool done = False;
2683 const int contextFlagsAll = (GLX_CONTEXT_DEBUG_BIT_ARB |
2684 GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
2685
2686 /* parse attrib_list */
2687 for (i = 0; !done && attrib_list && attrib_list[i]; i++) {
2688 switch (attrib_list[i]) {
2689 case GLX_CONTEXT_MAJOR_VERSION_ARB:
2690 majorVersion = attrib_list[++i];
2691 break;
2692 case GLX_CONTEXT_MINOR_VERSION_ARB:
2693 minorVersion = attrib_list[++i];
2694 break;
2695 case GLX_CONTEXT_FLAGS_ARB:
2696 contextFlags = attrib_list[++i];
2697 break;
2698 case GLX_CONTEXT_PROFILE_MASK_ARB:
2699 profileMask = attrib_list[++i];
2700 break;
2701 case GLX_RENDER_TYPE:
2702 renderType = attrib_list[++i];
2703 break;
2704 case 0:
2705 /* end of list */
2706 done = True;
2707 break;
2708 default:
2709 /* bad attribute */
2710 /* XXX generate BadValue X Error */
2711 return NULL;
2712 }
2713 }
2714
2715 /* check contextFlags */
2716 if (contextFlags & ~contextFlagsAll) {
2717 return NULL; /* generate BadValue X Error */
2718 }
2719
2720 /* check profileMask */
2721 if (profileMask != GLX_CONTEXT_CORE_PROFILE_BIT_ARB &&
2722 profileMask != GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
2723 return NULL; /* generate BadValue X Error */
2724 }
2725
2726 /* check version (generate BadMatch if bad) */
2727 if (majorVersion < 0 || minorVersion < 0)
2728 return NULL;
2729
2730 if ((contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
2731 majorVersion < 3)
2732 return NULL; /* generate GLXBadProfileARB */
2733
2734 if (renderType == GLX_COLOR_INDEX_TYPE && majorVersion >= 3)
2735 return NULL; /* generate BadMatch */
2736
2737 return create_context(dpy, xmvis,
2738 shareCtx ? shareCtx->xmesaContext : NULL,
2739 direct,
2740 majorVersion, minorVersion,
2741 profileMask, contextFlags);
2742 }