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Merge remote-tracking branch 'origin/master' into pipe-video
[mesa.git] / src / gallium / state_trackers / glx / xlib / glx_api.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.6
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /**
28 * "Fake" GLX API implemented in terms of the XMesa*() functions.
29 */
30
31
32
33 #define GLX_GLXEXT_PROTOTYPES
34 #include "GL/glx.h"
35
36 #include "xm_api.h"
37
38
39 /* This indicates the client-side GLX API and GLX encoder version. */
40 #define CLIENT_MAJOR_VERSION 1
41 #define CLIENT_MINOR_VERSION 4 /* but don't have 1.3's pbuffers, etc yet */
42
43 /* This indicates the server-side GLX decoder version.
44 * GLX 1.4 indicates OpenGL 1.3 support
45 */
46 #define SERVER_MAJOR_VERSION 1
47 #define SERVER_MINOR_VERSION 4
48
49 /* Who implemented this GLX? */
50 #define VENDOR "Brian Paul"
51
52 #define EXTENSIONS \
53 "GLX_MESA_copy_sub_buffer " \
54 "GLX_MESA_pixmap_colormap " \
55 "GLX_MESA_release_buffers " \
56 "GLX_ARB_get_proc_address " \
57 "GLX_EXT_texture_from_pixmap " \
58 "GLX_EXT_visual_info " \
59 "GLX_EXT_visual_rating " \
60 /*"GLX_SGI_video_sync "*/ \
61 "GLX_SGIX_fbconfig " \
62 "GLX_SGIX_pbuffer "
63
64 #define DEFAULT_DIRECT GL_TRUE
65
66
67
68 /**
69 * The GLXContext typedef is defined as a pointer to this structure.
70 */
71 struct __GLXcontextRec
72 {
73 Display *currentDpy;
74 GLboolean isDirect;
75 GLXDrawable currentDrawable;
76 GLXDrawable currentReadable;
77 XID xid;
78
79 XMesaContext xmesaContext;
80 };
81
82
83
84 static pipe_tsd ContextTSD;
85
86 /** Set current context for calling thread */
87 static void
88 SetCurrentContext(GLXContext c)
89 {
90 pipe_tsd_set(&ContextTSD, c);
91 }
92
93 /** Get current context for calling thread */
94 static GLXContext
95 GetCurrentContext(void)
96 {
97 return pipe_tsd_get(&ContextTSD);
98 }
99
100
101
102 /**********************************************************************/
103 /*** GLX Visual Code ***/
104 /**********************************************************************/
105
106 #define DONT_CARE -1
107
108
109 static XMesaVisual *VisualTable = NULL;
110 static int NumVisuals = 0;
111
112
113
114 /* Macro to handle c_class vs class field name in XVisualInfo struct */
115 #if defined(__cplusplus) || defined(c_plusplus)
116 #define CLASS c_class
117 #else
118 #define CLASS class
119 #endif
120
121
122
123 /*
124 * Test if the given XVisualInfo is usable for Mesa rendering.
125 */
126 static GLboolean
127 is_usable_visual( XVisualInfo *vinfo )
128 {
129 switch (vinfo->CLASS) {
130 case StaticGray:
131 case GrayScale:
132 /* Any StaticGray/GrayScale visual works in RGB or CI mode */
133 return GL_TRUE;
134 case StaticColor:
135 case PseudoColor:
136 /* Any StaticColor/PseudoColor visual of at least 4 bits */
137 if (vinfo->depth>=4) {
138 return GL_TRUE;
139 }
140 else {
141 return GL_FALSE;
142 }
143 case TrueColor:
144 case DirectColor:
145 /* Any depth of TrueColor or DirectColor works in RGB mode */
146 return GL_TRUE;
147 default:
148 /* This should never happen */
149 return GL_FALSE;
150 }
151 }
152
153
154 /*
155 * Given an XVisualInfo and RGB, Double, and Depth buffer flags, save the
156 * configuration in our list of GLX visuals.
157 */
158 static XMesaVisual
159 save_glx_visual( Display *dpy, XVisualInfo *vinfo,
160 GLboolean rgbFlag, GLboolean alphaFlag, GLboolean dbFlag,
161 GLboolean stereoFlag,
162 GLint depth_size, GLint stencil_size,
163 GLint accumRedSize, GLint accumGreenSize,
164 GLint accumBlueSize, GLint accumAlphaSize,
165 GLint level, GLint numAuxBuffers )
166 {
167 GLboolean ximageFlag = GL_TRUE;
168 XMesaVisual xmvis;
169 GLint i;
170 GLboolean comparePointers;
171
172 if (dbFlag) {
173 /* Check if the MESA_BACK_BUFFER env var is set */
174 char *backbuffer = _mesa_getenv("MESA_BACK_BUFFER");
175 if (backbuffer) {
176 if (backbuffer[0]=='p' || backbuffer[0]=='P') {
177 ximageFlag = GL_FALSE;
178 }
179 else if (backbuffer[0]=='x' || backbuffer[0]=='X') {
180 ximageFlag = GL_TRUE;
181 }
182 else {
183 _mesa_warning(NULL, "Mesa: invalid value for MESA_BACK_BUFFER environment variable, using an XImage.");
184 }
185 }
186 }
187
188 if (stereoFlag) {
189 /* stereo not supported */
190 return NULL;
191 }
192
193 if (stencil_size > 0 && depth_size > 0)
194 depth_size = 24;
195
196 /* Comparing IDs uses less memory but sometimes fails. */
197 /* XXX revisit this after 3.0 is finished. */
198 if (_mesa_getenv("MESA_GLX_VISUAL_HACK"))
199 comparePointers = GL_TRUE;
200 else
201 comparePointers = GL_FALSE;
202
203 /* Force the visual to have an alpha channel */
204 if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
205 alphaFlag = GL_TRUE;
206
207 /* First check if a matching visual is already in the list */
208 for (i=0; i<NumVisuals; i++) {
209 XMesaVisual v = VisualTable[i];
210 if (v->display == dpy
211 && v->mesa_visual.level == level
212 && v->mesa_visual.numAuxBuffers == numAuxBuffers
213 && v->ximage_flag == ximageFlag
214 && v->mesa_visual.rgbMode == rgbFlag
215 && v->mesa_visual.doubleBufferMode == dbFlag
216 && v->mesa_visual.stereoMode == stereoFlag
217 && (v->mesa_visual.alphaBits > 0) == alphaFlag
218 && (v->mesa_visual.depthBits >= depth_size || depth_size == 0)
219 && (v->mesa_visual.stencilBits >= stencil_size || stencil_size == 0)
220 && (v->mesa_visual.accumRedBits >= accumRedSize || accumRedSize == 0)
221 && (v->mesa_visual.accumGreenBits >= accumGreenSize || accumGreenSize == 0)
222 && (v->mesa_visual.accumBlueBits >= accumBlueSize || accumBlueSize == 0)
223 && (v->mesa_visual.accumAlphaBits >= accumAlphaSize || accumAlphaSize == 0)) {
224 /* now either compare XVisualInfo pointers or visual IDs */
225 if ((!comparePointers && v->visinfo->visualid == vinfo->visualid)
226 || (comparePointers && v->vishandle == vinfo)) {
227 return v;
228 }
229 }
230 }
231
232 /* Create a new visual and add it to the list. */
233
234 xmvis = XMesaCreateVisual( dpy, vinfo, rgbFlag, alphaFlag, dbFlag,
235 stereoFlag, ximageFlag,
236 depth_size, stencil_size,
237 accumRedSize, accumBlueSize,
238 accumBlueSize, accumAlphaSize, 0, level,
239 GLX_NONE_EXT );
240 if (xmvis) {
241 /* Save a copy of the pointer now so we can find this visual again
242 * if we need to search for it in find_glx_visual().
243 */
244 xmvis->vishandle = vinfo;
245 /* Allocate more space for additional visual */
246 VisualTable = (XMesaVisual *) _mesa_realloc( VisualTable,
247 sizeof(XMesaVisual) * NumVisuals,
248 sizeof(XMesaVisual) * (NumVisuals + 1));
249 /* add xmvis to the list */
250 VisualTable[NumVisuals] = xmvis;
251 NumVisuals++;
252 /* XXX minor hack, because XMesaCreateVisual doesn't support an
253 * aux buffers parameter.
254 */
255 xmvis->mesa_visual.numAuxBuffers = numAuxBuffers;
256 }
257 return xmvis;
258 }
259
260
261 /**
262 * Return the default number of bits for the Z buffer.
263 * If defined, use the MESA_GLX_DEPTH_BITS env var value.
264 * Otherwise, use the DEFAULT_SOFTWARE_DEPTH_BITS constant.
265 * XXX probably do the same thing for stencil, accum, etc.
266 */
267 static GLint
268 default_depth_bits(void)
269 {
270 int zBits;
271 const char *zEnv = _mesa_getenv("MESA_GLX_DEPTH_BITS");
272 if (zEnv)
273 zBits = atoi(zEnv);
274 else
275 zBits = DEFAULT_SOFTWARE_DEPTH_BITS;
276 return zBits;
277 }
278
279 static GLint
280 default_alpha_bits(void)
281 {
282 int aBits;
283 const char *aEnv = _mesa_getenv("MESA_GLX_ALPHA_BITS");
284 if (aEnv)
285 aBits = atoi(aEnv);
286 else
287 aBits = 0;
288 return aBits;
289 }
290
291 static GLint
292 default_accum_bits(void)
293 {
294 return 16;
295 }
296
297
298
299 /*
300 * Create a GLX visual from a regular XVisualInfo.
301 * This is called when Fake GLX is given an XVisualInfo which wasn't
302 * returned by glXChooseVisual. Since this is the first time we're
303 * considering this visual we'll take a guess at reasonable values
304 * for depth buffer size, stencil size, accum size, etc.
305 * This is the best we can do with a client-side emulation of GLX.
306 */
307 static XMesaVisual
308 create_glx_visual( Display *dpy, XVisualInfo *visinfo )
309 {
310 GLint zBits = default_depth_bits();
311 GLint accBits = default_accum_bits();
312 GLboolean alphaFlag = default_alpha_bits() > 0;
313
314 if (is_usable_visual( visinfo )) {
315 /* Configure this visual as RGB, double-buffered, depth-buffered. */
316 /* This is surely wrong for some people's needs but what else */
317 /* can be done? They should use glXChooseVisual(). */
318 return save_glx_visual( dpy, visinfo,
319 GL_TRUE, /* rgb */
320 alphaFlag, /* alpha */
321 GL_TRUE, /* double */
322 GL_FALSE, /* stereo */
323 zBits,
324 STENCIL_BITS,
325 accBits, /* r */
326 accBits, /* g */
327 accBits, /* b */
328 accBits, /* a */
329 0, /* level */
330 0 /* numAux */
331 );
332 }
333 else {
334 _mesa_warning(NULL, "Mesa: error in glXCreateContext: bad visual\n");
335 return NULL;
336 }
337 }
338
339
340
341 /*
342 * Find the GLX visual associated with an XVisualInfo.
343 */
344 static XMesaVisual
345 find_glx_visual( Display *dpy, XVisualInfo *vinfo )
346 {
347 int i;
348
349 /* try to match visual id */
350 for (i=0;i<NumVisuals;i++) {
351 if (VisualTable[i]->display==dpy
352 && VisualTable[i]->visinfo->visualid == vinfo->visualid) {
353 return VisualTable[i];
354 }
355 }
356
357 /* if that fails, try to match pointers */
358 for (i=0;i<NumVisuals;i++) {
359 if (VisualTable[i]->display==dpy && VisualTable[i]->vishandle==vinfo) {
360 return VisualTable[i];
361 }
362 }
363
364 return NULL;
365 }
366
367
368 /**
369 * Try to get an X visual which matches the given arguments.
370 */
371 static XVisualInfo *
372 get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
373 {
374 XVisualInfo temp, *vis;
375 long mask;
376 int n;
377 unsigned int default_depth;
378 int default_class;
379
380 mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
381 temp.screen = scr;
382 temp.depth = depth;
383 temp.CLASS = xclass;
384
385 default_depth = DefaultDepth(dpy,scr);
386 default_class = DefaultVisual(dpy,scr)->CLASS;
387
388 if (depth==default_depth && xclass==default_class) {
389 /* try to get root window's visual */
390 temp.visualid = DefaultVisual(dpy,scr)->visualid;
391 mask |= VisualIDMask;
392 }
393
394 vis = XGetVisualInfo( dpy, mask, &temp, &n );
395
396 /* In case bits/pixel > 24, make sure color channels are still <=8 bits.
397 * An SGI Infinite Reality system, for example, can have 30bpp pixels:
398 * 10 bits per color channel. Mesa's limited to a max of 8 bits/channel.
399 */
400 if (vis && depth > 24 && (xclass==TrueColor || xclass==DirectColor)) {
401 if (_mesa_bitcount((GLuint) vis->red_mask ) <= 8 &&
402 _mesa_bitcount((GLuint) vis->green_mask) <= 8 &&
403 _mesa_bitcount((GLuint) vis->blue_mask ) <= 8) {
404 return vis;
405 }
406 else {
407 XFree((void *) vis);
408 return NULL;
409 }
410 }
411
412 return vis;
413 }
414
415
416 /*
417 * Retrieve the value of the given environment variable and find
418 * the X visual which matches it.
419 * Input: dpy - the display
420 * screen - the screen number
421 * varname - the name of the environment variable
422 * Return: an XVisualInfo pointer to NULL if error.
423 */
424 static XVisualInfo *
425 get_env_visual(Display *dpy, int scr, const char *varname)
426 {
427 char value[100], type[100];
428 int depth, xclass = -1;
429 XVisualInfo *vis;
430
431 if (!_mesa_getenv( varname )) {
432 return NULL;
433 }
434
435 strncpy( value, _mesa_getenv(varname), 100 );
436 value[99] = 0;
437
438 sscanf( value, "%s %d", type, &depth );
439
440 if (strcmp(type,"TrueColor")==0) xclass = TrueColor;
441 else if (strcmp(type,"DirectColor")==0) xclass = DirectColor;
442 else if (strcmp(type,"PseudoColor")==0) xclass = PseudoColor;
443 else if (strcmp(type,"StaticColor")==0) xclass = StaticColor;
444 else if (strcmp(type,"GrayScale")==0) xclass = GrayScale;
445 else if (strcmp(type,"StaticGray")==0) xclass = StaticGray;
446
447 if (xclass>-1 && depth>0) {
448 vis = get_visual( dpy, scr, depth, xclass );
449 if (vis) {
450 return vis;
451 }
452 }
453
454 _mesa_warning(NULL, "GLX unable to find visual class=%s, depth=%d.",
455 type, depth);
456
457 return NULL;
458 }
459
460
461
462 /*
463 * Select an X visual which satisfies the RGBA flag and minimum depth.
464 * Input: dpy,
465 * screen - X display and screen number
466 * min_depth - minimum visual depth
467 * preferred_class - preferred GLX visual class or DONT_CARE
468 * Return: pointer to an XVisualInfo or NULL.
469 */
470 static XVisualInfo *
471 choose_x_visual( Display *dpy, int screen, int min_depth,
472 int preferred_class )
473 {
474 XVisualInfo *vis;
475 int xclass, visclass = 0;
476 int depth;
477
478 /* First see if the MESA_RGB_VISUAL env var is defined */
479 vis = get_env_visual( dpy, screen, "MESA_RGB_VISUAL" );
480 if (vis) {
481 return vis;
482 }
483 /* Otherwise, search for a suitable visual */
484 if (preferred_class==DONT_CARE) {
485 for (xclass=0;xclass<6;xclass++) {
486 switch (xclass) {
487 case 0: visclass = TrueColor; break;
488 case 1: visclass = DirectColor; break;
489 case 2: visclass = PseudoColor; break;
490 case 3: visclass = StaticColor; break;
491 case 4: visclass = GrayScale; break;
492 case 5: visclass = StaticGray; break;
493 }
494 if (min_depth==0) {
495 /* start with shallowest */
496 for (depth=0;depth<=32;depth++) {
497 if (visclass==TrueColor && depth==8) {
498 /* Special case: try to get 8-bit PseudoColor before */
499 /* 8-bit TrueColor */
500 vis = get_visual( dpy, screen, 8, PseudoColor );
501 if (vis) {
502 return vis;
503 }
504 }
505 vis = get_visual( dpy, screen, depth, visclass );
506 if (vis) {
507 return vis;
508 }
509 }
510 }
511 else {
512 /* start with deepest */
513 for (depth=32;depth>=min_depth;depth--) {
514 if (visclass==TrueColor && depth==8) {
515 /* Special case: try to get 8-bit PseudoColor before */
516 /* 8-bit TrueColor */
517 vis = get_visual( dpy, screen, 8, PseudoColor );
518 if (vis) {
519 return vis;
520 }
521 }
522 vis = get_visual( dpy, screen, depth, visclass );
523 if (vis) {
524 return vis;
525 }
526 }
527 }
528 }
529 }
530 else {
531 /* search for a specific visual class */
532 switch (preferred_class) {
533 case GLX_TRUE_COLOR_EXT: visclass = TrueColor; break;
534 case GLX_DIRECT_COLOR_EXT: visclass = DirectColor; break;
535 case GLX_PSEUDO_COLOR_EXT: visclass = PseudoColor; break;
536 case GLX_STATIC_COLOR_EXT: visclass = StaticColor; break;
537 case GLX_GRAY_SCALE_EXT: visclass = GrayScale; break;
538 case GLX_STATIC_GRAY_EXT: visclass = StaticGray; break;
539 default: return NULL;
540 }
541 if (min_depth==0) {
542 /* start with shallowest */
543 for (depth=0;depth<=32;depth++) {
544 vis = get_visual( dpy, screen, depth, visclass );
545 if (vis) {
546 return vis;
547 }
548 }
549 }
550 else {
551 /* start with deepest */
552 for (depth=32;depth>=min_depth;depth--) {
553 vis = get_visual( dpy, screen, depth, visclass );
554 if (vis) {
555 return vis;
556 }
557 }
558 }
559 }
560
561 /* didn't find a visual */
562 return NULL;
563 }
564
565
566
567
568 /**********************************************************************/
569 /*** Display-related functions ***/
570 /**********************************************************************/
571
572
573 /**
574 * Free all XMesaVisuals which are associated with the given display.
575 */
576 static void
577 destroy_visuals_on_display(Display *dpy)
578 {
579 int i;
580 for (i = 0; i < NumVisuals; i++) {
581 if (VisualTable[i]->display == dpy) {
582 /* remove this visual */
583 int j;
584 free(VisualTable[i]);
585 for (j = i; j < NumVisuals - 1; j++)
586 VisualTable[j] = VisualTable[j + 1];
587 NumVisuals--;
588 }
589 }
590 }
591
592
593 /**
594 * Called from XCloseDisplay() to let us free our display-related data.
595 */
596 static int
597 close_display_callback(Display *dpy, XExtCodes *codes)
598 {
599 xmesa_destroy_buffers_on_display(dpy);
600 destroy_visuals_on_display(dpy);
601 return 0;
602 }
603
604
605 /**
606 * Look for the named extension on given display and return a pointer
607 * to the _XExtension data, or NULL if extension not found.
608 */
609 static _XExtension *
610 lookup_extension(Display *dpy, const char *extName)
611 {
612 _XExtension *ext;
613 for (ext = dpy->ext_procs; ext; ext = ext->next) {
614 if (ext->name && strcmp(ext->name, extName) == 0) {
615 return ext;
616 }
617 }
618 return NULL;
619 }
620
621
622 /**
623 * Whenever we're given a new Display pointer, call this function to
624 * register our close_display_callback function.
625 */
626 static void
627 register_with_display(Display *dpy)
628 {
629 const char *extName = "MesaGLX";
630 _XExtension *ext;
631
632 ext = lookup_extension(dpy, extName);
633 if (!ext) {
634 XExtCodes *c = XAddExtension(dpy);
635 ext = dpy->ext_procs; /* new extension is at head of list */
636 assert(c->extension == ext->codes.extension);
637 (void) c;
638 ext->name = _mesa_strdup(extName);
639 ext->close_display = close_display_callback;
640 }
641 }
642
643
644 /**********************************************************************/
645 /*** Begin Fake GLX API Functions ***/
646 /**********************************************************************/
647
648
649 /**
650 * Helper used by glXChooseVisual and glXChooseFBConfig.
651 * The fbConfig parameter must be GL_FALSE for the former and GL_TRUE for
652 * the later.
653 * In either case, the attribute list is terminated with the value 'None'.
654 */
655 static XMesaVisual
656 choose_visual( Display *dpy, int screen, const int *list, GLboolean fbConfig )
657 {
658 const GLboolean rgbModeDefault = fbConfig;
659 const int *parselist;
660 XVisualInfo *vis;
661 int min_ci = 0;
662 int min_red=0, min_green=0, min_blue=0;
663 GLboolean rgb_flag = rgbModeDefault;
664 GLboolean alpha_flag = GL_FALSE;
665 GLboolean double_flag = GL_FALSE;
666 GLboolean stereo_flag = GL_FALSE;
667 GLint depth_size = 0;
668 GLint stencil_size = 0;
669 GLint accumRedSize = 0;
670 GLint accumGreenSize = 0;
671 GLint accumBlueSize = 0;
672 GLint accumAlphaSize = 0;
673 int level = 0;
674 int visual_type = DONT_CARE;
675 int trans_type = DONT_CARE;
676 int trans_value = DONT_CARE;
677 GLint caveat = DONT_CARE;
678 XMesaVisual xmvis = NULL;
679 int desiredVisualID = -1;
680 int numAux = 0;
681
682 xmesa_init( dpy );
683
684 parselist = list;
685
686 while (*parselist) {
687
688 switch (*parselist) {
689 case GLX_USE_GL:
690 if (fbConfig) {
691 /* invalid token */
692 return NULL;
693 }
694 else {
695 /* skip */
696 parselist++;
697 }
698 break;
699 case GLX_BUFFER_SIZE:
700 parselist++;
701 min_ci = *parselist++;
702 break;
703 case GLX_LEVEL:
704 parselist++;
705 level = *parselist++;
706 break;
707 case GLX_RGBA:
708 if (fbConfig) {
709 /* invalid token */
710 return NULL;
711 }
712 else {
713 rgb_flag = GL_TRUE;
714 parselist++;
715 }
716 break;
717 case GLX_DOUBLEBUFFER:
718 parselist++;
719 if (fbConfig) {
720 double_flag = *parselist++;
721 }
722 else {
723 double_flag = GL_TRUE;
724 }
725 break;
726 case GLX_STEREO:
727 parselist++;
728 if (fbConfig) {
729 stereo_flag = *parselist++;
730 }
731 else {
732 stereo_flag = GL_TRUE;
733 }
734 break;
735 case GLX_AUX_BUFFERS:
736 parselist++;
737 numAux = *parselist++;
738 if (numAux > MAX_AUX_BUFFERS)
739 return NULL;
740 break;
741 case GLX_RED_SIZE:
742 parselist++;
743 min_red = *parselist++;
744 break;
745 case GLX_GREEN_SIZE:
746 parselist++;
747 min_green = *parselist++;
748 break;
749 case GLX_BLUE_SIZE:
750 parselist++;
751 min_blue = *parselist++;
752 break;
753 case GLX_ALPHA_SIZE:
754 parselist++;
755 {
756 GLint size = *parselist++;
757 alpha_flag = size ? GL_TRUE : GL_FALSE;
758 }
759 break;
760 case GLX_DEPTH_SIZE:
761 parselist++;
762 depth_size = *parselist++;
763 break;
764 case GLX_STENCIL_SIZE:
765 parselist++;
766 stencil_size = *parselist++;
767 break;
768 case GLX_ACCUM_RED_SIZE:
769 parselist++;
770 {
771 GLint size = *parselist++;
772 accumRedSize = MAX2( accumRedSize, size );
773 }
774 break;
775 case GLX_ACCUM_GREEN_SIZE:
776 parselist++;
777 {
778 GLint size = *parselist++;
779 accumGreenSize = MAX2( accumGreenSize, size );
780 }
781 break;
782 case GLX_ACCUM_BLUE_SIZE:
783 parselist++;
784 {
785 GLint size = *parselist++;
786 accumBlueSize = MAX2( accumBlueSize, size );
787 }
788 break;
789 case GLX_ACCUM_ALPHA_SIZE:
790 parselist++;
791 {
792 GLint size = *parselist++;
793 accumAlphaSize = MAX2( accumAlphaSize, size );
794 }
795 break;
796
797 /*
798 * GLX_EXT_visual_info extension
799 */
800 case GLX_X_VISUAL_TYPE_EXT:
801 parselist++;
802 visual_type = *parselist++;
803 break;
804 case GLX_TRANSPARENT_TYPE_EXT:
805 parselist++;
806 trans_type = *parselist++;
807 break;
808 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
809 parselist++;
810 trans_value = *parselist++;
811 break;
812 case GLX_TRANSPARENT_RED_VALUE_EXT:
813 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
814 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
815 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
816 /* ignore */
817 parselist++;
818 parselist++;
819 break;
820
821 /*
822 * GLX_EXT_visual_info extension
823 */
824 case GLX_VISUAL_CAVEAT_EXT:
825 parselist++;
826 caveat = *parselist++; /* ignored for now */
827 break;
828
829 /*
830 * GLX_ARB_multisample
831 */
832 case GLX_SAMPLE_BUFFERS_ARB:
833 /* ms not supported */
834 return NULL;
835 case GLX_SAMPLES_ARB:
836 /* ms not supported */
837 return NULL;
838
839 /*
840 * FBConfig attribs.
841 */
842 case GLX_RENDER_TYPE:
843 if (!fbConfig)
844 return NULL;
845 parselist++;
846 if (*parselist & GLX_RGBA_BIT) {
847 rgb_flag = GL_TRUE;
848 }
849 else if (*parselist & GLX_COLOR_INDEX_BIT) {
850 rgb_flag = GL_FALSE;
851 }
852 else if (*parselist == 0) {
853 rgb_flag = GL_TRUE;
854 }
855 parselist++;
856 break;
857 case GLX_DRAWABLE_TYPE:
858 if (!fbConfig)
859 return NULL;
860 parselist++;
861 if (*parselist & ~(GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT)) {
862 return NULL; /* bad bit */
863 }
864 parselist++;
865 break;
866 case GLX_FBCONFIG_ID:
867 if (!fbConfig)
868 return NULL;
869 parselist++;
870 desiredVisualID = *parselist++;
871 break;
872 case GLX_X_RENDERABLE:
873 if (!fbConfig)
874 return NULL;
875 parselist += 2;
876 /* ignore */
877 break;
878
879 #ifdef GLX_EXT_texture_from_pixmap
880 case GLX_BIND_TO_TEXTURE_RGB_EXT:
881 parselist++; /*skip*/
882 break;
883 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
884 parselist++; /*skip*/
885 break;
886 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
887 parselist++; /*skip*/
888 break;
889 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
890 parselist++;
891 if (*parselist & ~(GLX_TEXTURE_1D_BIT_EXT |
892 GLX_TEXTURE_2D_BIT_EXT |
893 GLX_TEXTURE_RECTANGLE_BIT_EXT)) {
894 /* invalid bit */
895 return NULL;
896 }
897 break;
898 case GLX_Y_INVERTED_EXT:
899 parselist++; /*skip*/
900 break;
901 #endif
902
903 case None:
904 /* end of list */
905 break;
906
907 default:
908 /* undefined attribute */
909 _mesa_warning(NULL, "unexpected attrib 0x%x in choose_visual()",
910 *parselist);
911 return NULL;
912 }
913 }
914
915 (void) caveat;
916
917
918 /*
919 * Since we're only simulating the GLX extension this function will never
920 * find any real GL visuals. Instead, all we can do is try to find an RGB
921 * or CI visual of appropriate depth. Other requested attributes such as
922 * double buffering, depth buffer, etc. will be associated with the X
923 * visual and stored in the VisualTable[].
924 */
925 if (desiredVisualID != -1) {
926 /* try to get a specific visual, by visualID */
927 XVisualInfo temp;
928 int n;
929 temp.visualid = desiredVisualID;
930 temp.screen = screen;
931 vis = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask, &temp, &n);
932 if (vis) {
933 /* give the visual some useful GLX attributes */
934 double_flag = GL_TRUE;
935 rgb_flag = GL_TRUE;
936 }
937 }
938 else if (level==0) {
939 /* normal color planes */
940 /* Get an RGB visual */
941 int min_rgb = min_red + min_green + min_blue;
942 if (min_rgb>1 && min_rgb<8) {
943 /* a special case to be sure we can get a monochrome visual */
944 min_rgb = 1;
945 }
946 vis = choose_x_visual( dpy, screen, min_rgb, visual_type );
947 }
948 else {
949 _mesa_warning(NULL, "overlay not supported");
950 return NULL;
951 }
952
953 if (vis) {
954 /* Note: we're not exactly obeying the glXChooseVisual rules here.
955 * When GLX_DEPTH_SIZE = 1 is specified we're supposed to choose the
956 * largest depth buffer size, which is 32bits/value. Instead, we
957 * return 16 to maintain performance with earlier versions of Mesa.
958 */
959 if (stencil_size > 0)
960 depth_size = 24; /* if Z and stencil, always use 24+8 format */
961 else if (depth_size > 24)
962 depth_size = 32;
963 else if (depth_size > 16)
964 depth_size = 24;
965 else if (depth_size > 0) {
966 depth_size = default_depth_bits();
967 }
968
969 if (!alpha_flag) {
970 alpha_flag = default_alpha_bits() > 0;
971 }
972
973 /* we only support one size of stencil and accum buffers. */
974 if (stencil_size > 0)
975 stencil_size = STENCIL_BITS;
976
977 if (accumRedSize > 0 ||
978 accumGreenSize > 0 ||
979 accumBlueSize > 0 ||
980 accumAlphaSize > 0) {
981
982 accumRedSize =
983 accumGreenSize =
984 accumBlueSize = default_accum_bits();
985
986 accumAlphaSize = alpha_flag ? accumRedSize : 0;
987 }
988
989 xmvis = save_glx_visual( dpy, vis, rgb_flag, alpha_flag, double_flag,
990 stereo_flag, depth_size, stencil_size,
991 accumRedSize, accumGreenSize,
992 accumBlueSize, accumAlphaSize, level, numAux );
993 }
994
995 return xmvis;
996 }
997
998
999 PUBLIC XVisualInfo *
1000 glXChooseVisual( Display *dpy, int screen, int *list )
1001 {
1002 XMesaVisual xmvis;
1003
1004 /* register ourselves as an extension on this display */
1005 register_with_display(dpy);
1006
1007 xmvis = choose_visual(dpy, screen, list, GL_FALSE);
1008 if (xmvis) {
1009 /* create a new vishandle - the cached one may be stale */
1010 xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1011 if (xmvis->vishandle) {
1012 memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1013 }
1014 return xmvis->vishandle;
1015 }
1016 else
1017 return NULL;
1018 }
1019
1020
1021 /**
1022 * Helper function used by other glXCreateContext functions.
1023 */
1024 static GLXContext
1025 create_context(Display *dpy, XMesaVisual xmvis,
1026 XMesaContext shareCtx, Bool direct,
1027 unsigned major, unsigned minor,
1028 unsigned profileMask, unsigned contextFlags)
1029 {
1030 GLXContext glxCtx;
1031
1032 if (!dpy || !xmvis)
1033 return 0;
1034
1035 glxCtx = CALLOC_STRUCT(__GLXcontextRec);
1036 if (!glxCtx)
1037 return 0;
1038
1039 /* deallocate unused windows/buffers */
1040 #if 0
1041 XMesaGarbageCollect();
1042 #endif
1043
1044 glxCtx->xmesaContext = XMesaCreateContext(xmvis, shareCtx, major, minor,
1045 profileMask, contextFlags);
1046 if (!glxCtx->xmesaContext) {
1047 free(glxCtx);
1048 return NULL;
1049 }
1050
1051 glxCtx->isDirect = DEFAULT_DIRECT;
1052 glxCtx->currentDpy = dpy;
1053 glxCtx->xid = (XID) glxCtx; /* self pointer */
1054
1055 return glxCtx;
1056 }
1057
1058
1059 PUBLIC GLXContext
1060 glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1061 GLXContext shareCtx, Bool direct )
1062 {
1063 XMesaVisual xmvis;
1064
1065 xmvis = find_glx_visual( dpy, visinfo );
1066 if (!xmvis) {
1067 /* This visual wasn't found with glXChooseVisual() */
1068 xmvis = create_glx_visual( dpy, visinfo );
1069 if (!xmvis) {
1070 /* unusable visual */
1071 return NULL;
1072 }
1073 }
1074
1075 return create_context(dpy, xmvis,
1076 shareCtx ? shareCtx->xmesaContext : NULL,
1077 direct,
1078 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
1079 }
1080
1081
1082 /* XXX these may have to be removed due to thread-safety issues. */
1083 static GLXContext MakeCurrent_PrevContext = 0;
1084 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1085 static GLXDrawable MakeCurrent_PrevReadable = 0;
1086 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1087 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1088
1089
1090 /* GLX 1.3 and later */
1091 PUBLIC Bool
1092 glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1093 GLXDrawable read, GLXContext ctx )
1094 {
1095 GLXContext glxCtx = ctx;
1096 static boolean firsttime = 1, no_rast = 0;
1097
1098 if (firsttime) {
1099 no_rast = getenv("SP_NO_RAST") != NULL;
1100 firsttime = 0;
1101 }
1102
1103 if (ctx && draw && read) {
1104 XMesaBuffer drawBuffer, readBuffer;
1105 XMesaContext xmctx = glxCtx->xmesaContext;
1106
1107 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1108 if (ctx == MakeCurrent_PrevContext
1109 && draw == MakeCurrent_PrevDrawable) {
1110 drawBuffer = MakeCurrent_PrevDrawBuffer;
1111 }
1112 else {
1113 drawBuffer = XMesaFindBuffer( dpy, draw );
1114 }
1115 if (!drawBuffer) {
1116 /* drawable must be a new window! */
1117 drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1118 if (!drawBuffer) {
1119 /* Out of memory, or context/drawable depth mismatch */
1120 return False;
1121 }
1122 }
1123
1124 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1125 if (ctx == MakeCurrent_PrevContext
1126 && read == MakeCurrent_PrevReadable) {
1127 readBuffer = MakeCurrent_PrevReadBuffer;
1128 }
1129 else {
1130 readBuffer = XMesaFindBuffer( dpy, read );
1131 }
1132 if (!readBuffer) {
1133 /* drawable must be a new window! */
1134 readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1135 if (!readBuffer) {
1136 /* Out of memory, or context/drawable depth mismatch */
1137 return False;
1138 }
1139 }
1140
1141 if (no_rast &&
1142 MakeCurrent_PrevContext == ctx &&
1143 MakeCurrent_PrevDrawable == draw &&
1144 MakeCurrent_PrevReadable == read &&
1145 MakeCurrent_PrevDrawBuffer == drawBuffer &&
1146 MakeCurrent_PrevReadBuffer == readBuffer)
1147 return True;
1148
1149 MakeCurrent_PrevContext = ctx;
1150 MakeCurrent_PrevDrawable = draw;
1151 MakeCurrent_PrevReadable = read;
1152 MakeCurrent_PrevDrawBuffer = drawBuffer;
1153 MakeCurrent_PrevReadBuffer = readBuffer;
1154
1155 /* Now make current! */
1156 if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1157 ctx->currentDpy = dpy;
1158 ctx->currentDrawable = draw;
1159 ctx->currentReadable = read;
1160 SetCurrentContext(ctx);
1161 return True;
1162 }
1163 else {
1164 return False;
1165 }
1166 }
1167 else if (!ctx && !draw && !read) {
1168 /* release current context w/out assigning new one. */
1169 XMesaMakeCurrent2( NULL, NULL, NULL );
1170 MakeCurrent_PrevContext = 0;
1171 MakeCurrent_PrevDrawable = 0;
1172 MakeCurrent_PrevReadable = 0;
1173 MakeCurrent_PrevDrawBuffer = 0;
1174 MakeCurrent_PrevReadBuffer = 0;
1175 SetCurrentContext(NULL);
1176 return True;
1177 }
1178 else {
1179 /* The args must either all be non-zero or all zero.
1180 * This is an error.
1181 */
1182 return False;
1183 }
1184 }
1185
1186
1187 PUBLIC Bool
1188 glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1189 {
1190 return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1191 }
1192
1193
1194 PUBLIC GLXContext
1195 glXGetCurrentContext(void)
1196 {
1197 return GetCurrentContext();
1198 }
1199
1200
1201 PUBLIC Display *
1202 glXGetCurrentDisplay(void)
1203 {
1204 GLXContext glxCtx = glXGetCurrentContext();
1205
1206 return glxCtx ? glxCtx->currentDpy : NULL;
1207 }
1208
1209
1210 PUBLIC Display *
1211 glXGetCurrentDisplayEXT(void)
1212 {
1213 return glXGetCurrentDisplay();
1214 }
1215
1216
1217 PUBLIC GLXDrawable
1218 glXGetCurrentDrawable(void)
1219 {
1220 GLXContext gc = glXGetCurrentContext();
1221 return gc ? gc->currentDrawable : 0;
1222 }
1223
1224
1225 PUBLIC GLXDrawable
1226 glXGetCurrentReadDrawable(void)
1227 {
1228 GLXContext gc = glXGetCurrentContext();
1229 return gc ? gc->currentReadable : 0;
1230 }
1231
1232
1233 PUBLIC GLXDrawable
1234 glXGetCurrentReadDrawableSGI(void)
1235 {
1236 return glXGetCurrentReadDrawable();
1237 }
1238
1239
1240 PUBLIC GLXPixmap
1241 glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1242 {
1243 XMesaVisual v;
1244 XMesaBuffer b;
1245
1246 v = find_glx_visual( dpy, visinfo );
1247 if (!v) {
1248 v = create_glx_visual( dpy, visinfo );
1249 if (!v) {
1250 /* unusable visual */
1251 return 0;
1252 }
1253 }
1254
1255 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1256 if (!b) {
1257 return 0;
1258 }
1259 return b->drawable;
1260 }
1261
1262
1263 /*** GLX_MESA_pixmap_colormap ***/
1264
1265 PUBLIC GLXPixmap
1266 glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1267 Pixmap pixmap, Colormap cmap )
1268 {
1269 XMesaVisual v;
1270 XMesaBuffer b;
1271
1272 v = find_glx_visual( dpy, visinfo );
1273 if (!v) {
1274 v = create_glx_visual( dpy, visinfo );
1275 if (!v) {
1276 /* unusable visual */
1277 return 0;
1278 }
1279 }
1280
1281 b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1282 if (!b) {
1283 return 0;
1284 }
1285 return b->drawable;
1286 }
1287
1288
1289 PUBLIC void
1290 glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1291 {
1292 XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1293 if (b) {
1294 XMesaDestroyBuffer(b);
1295 }
1296 else if (_mesa_getenv("MESA_DEBUG")) {
1297 _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1298 }
1299 }
1300
1301
1302 PUBLIC void
1303 glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1304 unsigned long mask )
1305 {
1306 XMesaContext xm_src = src->xmesaContext;
1307 XMesaContext xm_dst = dst->xmesaContext;
1308 (void) dpy;
1309 if (MakeCurrent_PrevContext == src) {
1310 glFlush();
1311 }
1312 XMesaCopyContext(xm_src, xm_dst, mask);
1313 }
1314
1315
1316 PUBLIC Bool
1317 glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1318 {
1319 int op, ev, err;
1320 /* Mesa's GLX isn't really an X extension but we try to act like one. */
1321 if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1322 ev = err = 0;
1323 if (errorBase)
1324 *errorBase = err;
1325 if (eventBase)
1326 *eventBase = ev;
1327 return True; /* we're faking GLX so always return success */
1328 }
1329
1330
1331 PUBLIC void
1332 glXDestroyContext( Display *dpy, GLXContext ctx )
1333 {
1334 GLXContext glxCtx = ctx;
1335 (void) dpy;
1336 MakeCurrent_PrevContext = 0;
1337 MakeCurrent_PrevDrawable = 0;
1338 MakeCurrent_PrevReadable = 0;
1339 MakeCurrent_PrevDrawBuffer = 0;
1340 MakeCurrent_PrevReadBuffer = 0;
1341 XMesaDestroyContext( glxCtx->xmesaContext );
1342 XMesaGarbageCollect();
1343 free(glxCtx);
1344 }
1345
1346
1347 PUBLIC Bool
1348 glXIsDirect( Display *dpy, GLXContext ctx )
1349 {
1350 GLXContext glxCtx = ctx;
1351 (void) ctx;
1352 return glxCtx->isDirect;
1353 }
1354
1355
1356
1357 PUBLIC void
1358 glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1359 {
1360 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1361 static boolean firsttime = 1, no_rast = 0;
1362
1363 if (firsttime) {
1364 no_rast = getenv("SP_NO_RAST") != NULL;
1365 firsttime = 0;
1366 }
1367
1368 if (no_rast)
1369 return;
1370
1371 if (buffer) {
1372 XMesaSwapBuffers(buffer);
1373 }
1374 else if (_mesa_getenv("MESA_DEBUG")) {
1375 _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1376 (int) drawable);
1377 }
1378 }
1379
1380
1381
1382 /*** GLX_MESA_copy_sub_buffer ***/
1383
1384 PUBLIC void
1385 glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
1386 int x, int y, int width, int height)
1387 {
1388 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1389 if (buffer) {
1390 XMesaCopySubBuffer(buffer, x, y, width, height);
1391 }
1392 else if (_mesa_getenv("MESA_DEBUG")) {
1393 _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1394 }
1395 }
1396
1397
1398 PUBLIC Bool
1399 glXQueryVersion( Display *dpy, int *maj, int *min )
1400 {
1401 (void) dpy;
1402 /* Return GLX version, not Mesa version */
1403 assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1404 *maj = CLIENT_MAJOR_VERSION;
1405 *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1406 return True;
1407 }
1408
1409
1410 /*
1411 * Query the GLX attributes of the given XVisualInfo.
1412 */
1413 static int
1414 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1415 {
1416 ASSERT(xmvis);
1417 switch(attrib) {
1418 case GLX_USE_GL:
1419 if (fbconfig)
1420 return GLX_BAD_ATTRIBUTE;
1421 *value = (int) True;
1422 return 0;
1423 case GLX_BUFFER_SIZE:
1424 *value = xmvis->visinfo->depth;
1425 return 0;
1426 case GLX_LEVEL:
1427 *value = xmvis->mesa_visual.level;
1428 return 0;
1429 case GLX_RGBA:
1430 if (fbconfig)
1431 return GLX_BAD_ATTRIBUTE;
1432 if (xmvis->mesa_visual.rgbMode) {
1433 *value = True;
1434 }
1435 else {
1436 *value = False;
1437 }
1438 return 0;
1439 case GLX_DOUBLEBUFFER:
1440 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1441 return 0;
1442 case GLX_STEREO:
1443 *value = (int) xmvis->mesa_visual.stereoMode;
1444 return 0;
1445 case GLX_AUX_BUFFERS:
1446 *value = xmvis->mesa_visual.numAuxBuffers;
1447 return 0;
1448 case GLX_RED_SIZE:
1449 *value = xmvis->mesa_visual.redBits;
1450 return 0;
1451 case GLX_GREEN_SIZE:
1452 *value = xmvis->mesa_visual.greenBits;
1453 return 0;
1454 case GLX_BLUE_SIZE:
1455 *value = xmvis->mesa_visual.blueBits;
1456 return 0;
1457 case GLX_ALPHA_SIZE:
1458 *value = xmvis->mesa_visual.alphaBits;
1459 return 0;
1460 case GLX_DEPTH_SIZE:
1461 *value = xmvis->mesa_visual.depthBits;
1462 return 0;
1463 case GLX_STENCIL_SIZE:
1464 *value = xmvis->mesa_visual.stencilBits;
1465 return 0;
1466 case GLX_ACCUM_RED_SIZE:
1467 *value = xmvis->mesa_visual.accumRedBits;
1468 return 0;
1469 case GLX_ACCUM_GREEN_SIZE:
1470 *value = xmvis->mesa_visual.accumGreenBits;
1471 return 0;
1472 case GLX_ACCUM_BLUE_SIZE:
1473 *value = xmvis->mesa_visual.accumBlueBits;
1474 return 0;
1475 case GLX_ACCUM_ALPHA_SIZE:
1476 *value = xmvis->mesa_visual.accumAlphaBits;
1477 return 0;
1478
1479 /*
1480 * GLX_EXT_visual_info extension
1481 */
1482 case GLX_X_VISUAL_TYPE_EXT:
1483 switch (xmvis->visinfo->CLASS) {
1484 case StaticGray: *value = GLX_STATIC_GRAY_EXT; return 0;
1485 case GrayScale: *value = GLX_GRAY_SCALE_EXT; return 0;
1486 case StaticColor: *value = GLX_STATIC_GRAY_EXT; return 0;
1487 case PseudoColor: *value = GLX_PSEUDO_COLOR_EXT; return 0;
1488 case TrueColor: *value = GLX_TRUE_COLOR_EXT; return 0;
1489 case DirectColor: *value = GLX_DIRECT_COLOR_EXT; return 0;
1490 }
1491 return 0;
1492 case GLX_TRANSPARENT_TYPE_EXT:
1493 /* normal planes */
1494 *value = GLX_NONE_EXT;
1495 return 0;
1496 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1497 /* undefined */
1498 return 0;
1499 case GLX_TRANSPARENT_RED_VALUE_EXT:
1500 /* undefined */
1501 return 0;
1502 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1503 /* undefined */
1504 return 0;
1505 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1506 /* undefined */
1507 return 0;
1508 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1509 /* undefined */
1510 return 0;
1511
1512 /*
1513 * GLX_EXT_visual_info extension
1514 */
1515 case GLX_VISUAL_CAVEAT_EXT:
1516 /* test for zero, just in case */
1517 if (xmvis->mesa_visual.visualRating > 0)
1518 *value = xmvis->mesa_visual.visualRating;
1519 else
1520 *value = GLX_NONE_EXT;
1521 return 0;
1522
1523 /*
1524 * GLX_ARB_multisample
1525 */
1526 case GLX_SAMPLE_BUFFERS_ARB:
1527 *value = 0;
1528 return 0;
1529 case GLX_SAMPLES_ARB:
1530 *value = 0;
1531 return 0;
1532
1533 /*
1534 * For FBConfigs:
1535 */
1536 case GLX_SCREEN_EXT:
1537 if (!fbconfig)
1538 return GLX_BAD_ATTRIBUTE;
1539 *value = xmvis->visinfo->screen;
1540 break;
1541 case GLX_DRAWABLE_TYPE: /*SGIX too */
1542 if (!fbconfig)
1543 return GLX_BAD_ATTRIBUTE;
1544 *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1545 break;
1546 case GLX_RENDER_TYPE_SGIX:
1547 if (!fbconfig)
1548 return GLX_BAD_ATTRIBUTE;
1549 if (xmvis->mesa_visual.rgbMode)
1550 *value = GLX_RGBA_BIT;
1551 else
1552 *value = GLX_COLOR_INDEX_BIT;
1553 break;
1554 case GLX_X_RENDERABLE_SGIX:
1555 if (!fbconfig)
1556 return GLX_BAD_ATTRIBUTE;
1557 *value = True; /* XXX really? */
1558 break;
1559 case GLX_FBCONFIG_ID_SGIX:
1560 if (!fbconfig)
1561 return GLX_BAD_ATTRIBUTE;
1562 *value = xmvis->visinfo->visualid;
1563 break;
1564 case GLX_MAX_PBUFFER_WIDTH:
1565 if (!fbconfig)
1566 return GLX_BAD_ATTRIBUTE;
1567 /* XXX or MAX_WIDTH? */
1568 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1569 break;
1570 case GLX_MAX_PBUFFER_HEIGHT:
1571 if (!fbconfig)
1572 return GLX_BAD_ATTRIBUTE;
1573 *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1574 break;
1575 case GLX_MAX_PBUFFER_PIXELS:
1576 if (!fbconfig)
1577 return GLX_BAD_ATTRIBUTE;
1578 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1579 DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1580 break;
1581 case GLX_VISUAL_ID:
1582 if (!fbconfig)
1583 return GLX_BAD_ATTRIBUTE;
1584 *value = xmvis->visinfo->visualid;
1585 break;
1586
1587 #ifdef GLX_EXT_texture_from_pixmap
1588 case GLX_BIND_TO_TEXTURE_RGB_EXT:
1589 *value = True; /*XXX*/
1590 break;
1591 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1592 /* XXX review */
1593 *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1594 break;
1595 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1596 *value = True; /*XXX*/
1597 break;
1598 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1599 *value = (GLX_TEXTURE_1D_BIT_EXT |
1600 GLX_TEXTURE_2D_BIT_EXT |
1601 GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1602 break;
1603 case GLX_Y_INVERTED_EXT:
1604 *value = True; /*XXX*/
1605 break;
1606 #endif
1607
1608 default:
1609 return GLX_BAD_ATTRIBUTE;
1610 }
1611 return Success;
1612 }
1613
1614
1615 PUBLIC int
1616 glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1617 int attrib, int *value )
1618 {
1619 XMesaVisual xmvis;
1620 int k;
1621 if (!dpy || !visinfo)
1622 return GLX_BAD_ATTRIBUTE;
1623
1624 xmvis = find_glx_visual( dpy, visinfo );
1625 if (!xmvis) {
1626 /* this visual wasn't obtained with glXChooseVisual */
1627 xmvis = create_glx_visual( dpy, visinfo );
1628 if (!xmvis) {
1629 /* this visual can't be used for GL rendering */
1630 if (attrib==GLX_USE_GL) {
1631 *value = (int) False;
1632 return 0;
1633 }
1634 else {
1635 return GLX_BAD_VISUAL;
1636 }
1637 }
1638 }
1639
1640 k = get_config(xmvis, attrib, value, GL_FALSE);
1641 return k;
1642 }
1643
1644
1645 PUBLIC void
1646 glXWaitGL( void )
1647 {
1648 XMesaContext xmesa = XMesaGetCurrentContext();
1649 XMesaFlush( xmesa );
1650 }
1651
1652
1653
1654 PUBLIC void
1655 glXWaitX( void )
1656 {
1657 XMesaContext xmesa = XMesaGetCurrentContext();
1658 XMesaFlush( xmesa );
1659 }
1660
1661
1662 static const char *
1663 get_extensions( void )
1664 {
1665 return EXTENSIONS;
1666 }
1667
1668
1669
1670 /* GLX 1.1 and later */
1671 PUBLIC const char *
1672 glXQueryExtensionsString( Display *dpy, int screen )
1673 {
1674 (void) dpy;
1675 (void) screen;
1676 return get_extensions();
1677 }
1678
1679
1680
1681 /* GLX 1.1 and later */
1682 PUBLIC const char *
1683 glXQueryServerString( Display *dpy, int screen, int name )
1684 {
1685 static char version[1000];
1686 sprintf(version, "%d.%d %s",
1687 SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
1688
1689 (void) dpy;
1690 (void) screen;
1691
1692 switch (name) {
1693 case GLX_EXTENSIONS:
1694 return get_extensions();
1695 case GLX_VENDOR:
1696 return VENDOR;
1697 case GLX_VERSION:
1698 return version;
1699 default:
1700 return NULL;
1701 }
1702 }
1703
1704
1705
1706 /* GLX 1.1 and later */
1707 PUBLIC const char *
1708 glXGetClientString( Display *dpy, int name )
1709 {
1710 static char version[1000];
1711 sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1712 CLIENT_MINOR_VERSION, xmesa_get_name());
1713
1714 (void) dpy;
1715
1716 switch (name) {
1717 case GLX_EXTENSIONS:
1718 return get_extensions();
1719 case GLX_VENDOR:
1720 return VENDOR;
1721 case GLX_VERSION:
1722 return version;
1723 default:
1724 return NULL;
1725 }
1726 }
1727
1728
1729
1730 /*
1731 * GLX 1.3 and later
1732 */
1733
1734
1735 PUBLIC int
1736 glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
1737 int attribute, int *value)
1738 {
1739 XMesaVisual v = (XMesaVisual) config;
1740 (void) dpy;
1741 (void) config;
1742
1743 if (!dpy || !config || !value)
1744 return -1;
1745
1746 return get_config(v, attribute, value, GL_TRUE);
1747 }
1748
1749
1750 PUBLIC GLXFBConfig *
1751 glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1752 {
1753 XVisualInfo *visuals, visTemplate;
1754 const long visMask = VisualScreenMask;
1755 int i;
1756
1757 /* Get list of all X visuals */
1758 visTemplate.screen = screen;
1759 visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1760 if (*nelements > 0) {
1761 XMesaVisual *results;
1762 results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1763 if (!results) {
1764 *nelements = 0;
1765 return NULL;
1766 }
1767 for (i = 0; i < *nelements; i++) {
1768 results[i] = create_glx_visual(dpy, visuals + i);
1769 if (!results[i]) {
1770 *nelements = i;
1771 break;
1772 }
1773 }
1774 return (GLXFBConfig *) results;
1775 }
1776 return NULL;
1777 }
1778
1779
1780 PUBLIC GLXFBConfig *
1781 glXChooseFBConfig(Display *dpy, int screen,
1782 const int *attribList, int *nitems)
1783 {
1784 XMesaVisual xmvis;
1785
1786 if (!attribList || !attribList[0]) {
1787 /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1788 return glXGetFBConfigs(dpy, screen, nitems);
1789 }
1790
1791 xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1792 if (xmvis) {
1793 GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1794 if (!config) {
1795 *nitems = 0;
1796 return NULL;
1797 }
1798 *nitems = 1;
1799 config[0] = (GLXFBConfig) xmvis;
1800 return (GLXFBConfig *) config;
1801 }
1802 else {
1803 *nitems = 0;
1804 return NULL;
1805 }
1806 }
1807
1808
1809 PUBLIC XVisualInfo *
1810 glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1811 {
1812 if (dpy && config) {
1813 XMesaVisual xmvis = (XMesaVisual) config;
1814 #if 0
1815 return xmvis->vishandle;
1816 #else
1817 /* create a new vishandle - the cached one may be stale */
1818 xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1819 if (xmvis->vishandle) {
1820 memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1821 }
1822 return xmvis->vishandle;
1823 #endif
1824 }
1825 else {
1826 return NULL;
1827 }
1828 }
1829
1830
1831 PUBLIC GLXWindow
1832 glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
1833 const int *attribList)
1834 {
1835 XMesaVisual xmvis = (XMesaVisual) config;
1836 XMesaBuffer xmbuf;
1837 if (!xmvis)
1838 return 0;
1839
1840 xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1841 if (!xmbuf)
1842 return 0;
1843
1844 (void) dpy;
1845 (void) attribList; /* Ignored in GLX 1.3 */
1846
1847 return win; /* A hack for now */
1848 }
1849
1850
1851 PUBLIC void
1852 glXDestroyWindow( Display *dpy, GLXWindow window )
1853 {
1854 XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1855 if (b)
1856 XMesaDestroyBuffer(b);
1857 /* don't destroy X window */
1858 }
1859
1860
1861 /* XXX untested */
1862 PUBLIC GLXPixmap
1863 glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
1864 const int *attribList)
1865 {
1866 XMesaVisual v = (XMesaVisual) config;
1867 XMesaBuffer b;
1868 const int *attr;
1869 int target = 0, format = 0, mipmap = 0;
1870 int value;
1871
1872 if (!dpy || !config || !pixmap)
1873 return 0;
1874
1875 for (attr = attribList; attr && *attr; attr++) {
1876 switch (*attr) {
1877 case GLX_TEXTURE_FORMAT_EXT:
1878 attr++;
1879 switch (*attr) {
1880 case GLX_TEXTURE_FORMAT_NONE_EXT:
1881 case GLX_TEXTURE_FORMAT_RGB_EXT:
1882 case GLX_TEXTURE_FORMAT_RGBA_EXT:
1883 format = *attr;
1884 break;
1885 default:
1886 /* error */
1887 return 0;
1888 }
1889 break;
1890 case GLX_TEXTURE_TARGET_EXT:
1891 attr++;
1892 switch (*attr) {
1893 case GLX_TEXTURE_1D_EXT:
1894 case GLX_TEXTURE_2D_EXT:
1895 case GLX_TEXTURE_RECTANGLE_EXT:
1896 target = *attr;
1897 break;
1898 default:
1899 /* error */
1900 return 0;
1901 }
1902 break;
1903 case GLX_MIPMAP_TEXTURE_EXT:
1904 attr++;
1905 if (*attr)
1906 mipmap = 1;
1907 break;
1908 default:
1909 /* error */
1910 return 0;
1911 }
1912 }
1913
1914 if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1915 if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1916 &value, GL_TRUE) != Success
1917 || !value) {
1918 return 0; /* error! */
1919 }
1920 }
1921 else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1922 if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1923 &value, GL_TRUE) != Success
1924 || !value) {
1925 return 0; /* error! */
1926 }
1927 }
1928 if (mipmap) {
1929 if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1930 &value, GL_TRUE) != Success
1931 || !value) {
1932 return 0; /* error! */
1933 }
1934 }
1935 if (target == GLX_TEXTURE_1D_EXT) {
1936 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1937 &value, GL_TRUE) != Success
1938 || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1939 return 0; /* error! */
1940 }
1941 }
1942 else if (target == GLX_TEXTURE_2D_EXT) {
1943 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1944 &value, GL_TRUE) != Success
1945 || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1946 return 0; /* error! */
1947 }
1948 }
1949 if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1950 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1951 &value, GL_TRUE) != Success
1952 || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1953 return 0; /* error! */
1954 }
1955 }
1956
1957 if (format || target || mipmap) {
1958 /* texture from pixmap */
1959 b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1960 }
1961 else {
1962 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1963 }
1964 if (!b) {
1965 return 0;
1966 }
1967
1968 return pixmap;
1969 }
1970
1971
1972 PUBLIC void
1973 glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1974 {
1975 XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1976 if (b)
1977 XMesaDestroyBuffer(b);
1978 /* don't destroy X pixmap */
1979 }
1980
1981
1982 PUBLIC GLXPbuffer
1983 glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
1984 {
1985 XMesaVisual xmvis = (XMesaVisual) config;
1986 XMesaBuffer xmbuf;
1987 const int *attrib;
1988 int width = 0, height = 0;
1989 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1990
1991 (void) dpy;
1992
1993 for (attrib = attribList; *attrib; attrib++) {
1994 switch (*attrib) {
1995 case GLX_PBUFFER_WIDTH:
1996 attrib++;
1997 width = *attrib;
1998 break;
1999 case GLX_PBUFFER_HEIGHT:
2000 attrib++;
2001 height = *attrib;
2002 break;
2003 case GLX_PRESERVED_CONTENTS:
2004 attrib++;
2005 preserveContents = *attrib;
2006 break;
2007 case GLX_LARGEST_PBUFFER:
2008 attrib++;
2009 useLargest = *attrib;
2010 break;
2011 default:
2012 return 0;
2013 }
2014 }
2015
2016 if (width == 0 || height == 0)
2017 return 0;
2018
2019 if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2020 /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2021 * allocate the largest possible buffer.
2022 */
2023 if (useLargest) {
2024 width = MAX_WIDTH;
2025 height = MAX_HEIGHT;
2026 }
2027 }
2028
2029 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2030 /* A GLXPbuffer handle must be an X Drawable because that's what
2031 * glXMakeCurrent takes.
2032 */
2033 if (xmbuf) {
2034 xmbuf->largestPbuffer = useLargest;
2035 xmbuf->preservedContents = preserveContents;
2036 return (GLXPbuffer) xmbuf->drawable;
2037 }
2038 else {
2039 return 0;
2040 }
2041 }
2042
2043
2044 PUBLIC void
2045 glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2046 {
2047 XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2048 if (b) {
2049 XMesaDestroyBuffer(b);
2050 }
2051 }
2052
2053
2054 PUBLIC void
2055 glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
2056 unsigned int *value)
2057 {
2058 GLuint width, height;
2059 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2060 if (!xmbuf)
2061 return;
2062
2063 /* make sure buffer's dimensions are up to date */
2064 xmesa_get_window_size(dpy, xmbuf, &width, &height);
2065
2066 switch (attribute) {
2067 case GLX_WIDTH:
2068 *value = width;
2069 break;
2070 case GLX_HEIGHT:
2071 *value = height;
2072 break;
2073 case GLX_PRESERVED_CONTENTS:
2074 *value = xmbuf->preservedContents;
2075 break;
2076 case GLX_LARGEST_PBUFFER:
2077 *value = xmbuf->largestPbuffer;
2078 break;
2079 case GLX_FBCONFIG_ID:
2080 *value = xmbuf->xm_visual->visinfo->visualid;
2081 return;
2082 #ifdef GLX_EXT_texture_from_pixmap
2083 case GLX_TEXTURE_FORMAT_EXT:
2084 *value = xmbuf->TextureFormat;
2085 break;
2086 case GLX_TEXTURE_TARGET_EXT:
2087 *value = xmbuf->TextureTarget;
2088 break;
2089 case GLX_MIPMAP_TEXTURE_EXT:
2090 *value = xmbuf->TextureMipmap;
2091 break;
2092 #endif
2093
2094 default:
2095 return; /* raise BadValue error */
2096 }
2097 }
2098
2099
2100 PUBLIC GLXContext
2101 glXCreateNewContext( Display *dpy, GLXFBConfig config,
2102 int renderType, GLXContext shareCtx, Bool direct )
2103 {
2104 XMesaVisual xmvis = (XMesaVisual) config;
2105
2106 if (!dpy || !config ||
2107 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2108 return 0;
2109
2110 return create_context(dpy, xmvis,
2111 shareCtx ? shareCtx->xmesaContext : NULL,
2112 direct,
2113 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2114 }
2115
2116
2117 PUBLIC int
2118 glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2119 {
2120 GLXContext glxCtx = ctx;
2121 XMesaContext xmctx = glxCtx->xmesaContext;
2122
2123 (void) dpy;
2124 (void) ctx;
2125
2126 switch (attribute) {
2127 case GLX_FBCONFIG_ID:
2128 *value = xmctx->xm_visual->visinfo->visualid;
2129 break;
2130 case GLX_RENDER_TYPE:
2131 if (xmctx->xm_visual->mesa_visual.rgbMode)
2132 *value = GLX_RGBA_TYPE;
2133 else
2134 *value = GLX_COLOR_INDEX_TYPE;
2135 break;
2136 case GLX_SCREEN:
2137 *value = 0;
2138 return Success;
2139 default:
2140 return GLX_BAD_ATTRIBUTE;
2141 }
2142 return 0;
2143 }
2144
2145
2146 PUBLIC void
2147 glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2148 {
2149 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2150 if (xmbuf)
2151 xmbuf->selectedEvents = mask;
2152 }
2153
2154
2155 PUBLIC void
2156 glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2157 {
2158 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2159 if (xmbuf)
2160 *mask = xmbuf->selectedEvents;
2161 else
2162 *mask = 0;
2163 }
2164
2165
2166
2167 /*** GLX_SGI_swap_control ***/
2168
2169 PUBLIC int
2170 glXSwapIntervalSGI(int interval)
2171 {
2172 (void) interval;
2173 return 0;
2174 }
2175
2176
2177
2178 /*** GLX_SGI_video_sync ***/
2179
2180 static unsigned int FrameCounter = 0;
2181
2182 PUBLIC int
2183 glXGetVideoSyncSGI(unsigned int *count)
2184 {
2185 /* this is a bogus implementation */
2186 *count = FrameCounter++;
2187 return 0;
2188 }
2189
2190 PUBLIC int
2191 glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2192 {
2193 if (divisor <= 0 || remainder < 0)
2194 return GLX_BAD_VALUE;
2195 /* this is a bogus implementation */
2196 FrameCounter++;
2197 while (FrameCounter % divisor != remainder)
2198 FrameCounter++;
2199 *count = FrameCounter;
2200 return 0;
2201 }
2202
2203
2204
2205 /*** GLX_SGI_make_current_read ***/
2206
2207 PUBLIC Bool
2208 glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
2209 GLXContext ctx)
2210 {
2211 return glXMakeContextCurrent( dpy, draw, read, ctx );
2212 }
2213
2214 /* not used
2215 static GLXDrawable
2216 glXGetCurrentReadDrawableSGI(void)
2217 {
2218 return 0;
2219 }
2220 */
2221
2222
2223 /*** GLX_SGIX_video_source ***/
2224 #if defined(_VL_H)
2225
2226 PUBLIC GLXVideoSourceSGIX
2227 glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
2228 VLPath path, int nodeClass, VLNode drainNode)
2229 {
2230 (void) dpy;
2231 (void) screen;
2232 (void) server;
2233 (void) path;
2234 (void) nodeClass;
2235 (void) drainNode;
2236 return 0;
2237 }
2238
2239 PUBLIC void
2240 glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2241 {
2242 (void) dpy;
2243 (void) src;
2244 }
2245
2246 #endif
2247
2248
2249 /*** GLX_EXT_import_context ***/
2250
2251 PUBLIC void
2252 glXFreeContextEXT(Display *dpy, GLXContext context)
2253 {
2254 (void) dpy;
2255 (void) context;
2256 }
2257
2258 PUBLIC GLXContextID
2259 glXGetContextIDEXT(const GLXContext context)
2260 {
2261 (void) context;
2262 return 0;
2263 }
2264
2265 PUBLIC GLXContext
2266 glXImportContextEXT(Display *dpy, GLXContextID contextID)
2267 {
2268 (void) dpy;
2269 (void) contextID;
2270 return 0;
2271 }
2272
2273 PUBLIC int
2274 glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
2275 int *value)
2276 {
2277 (void) dpy;
2278 (void) context;
2279 (void) attribute;
2280 (void) value;
2281 return 0;
2282 }
2283
2284
2285
2286 /*** GLX_SGIX_fbconfig ***/
2287
2288 PUBLIC int
2289 glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
2290 int attribute, int *value)
2291 {
2292 return glXGetFBConfigAttrib(dpy, config, attribute, value);
2293 }
2294
2295 PUBLIC GLXFBConfigSGIX *
2296 glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list,
2297 int *nelements)
2298 {
2299 return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
2300 attrib_list, nelements);
2301 }
2302
2303
2304 PUBLIC GLXPixmap
2305 glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2306 Pixmap pixmap)
2307 {
2308 XMesaVisual xmvis = (XMesaVisual) config;
2309 XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2310 return xmbuf->drawable; /* need to return an X ID */
2311 }
2312
2313
2314 PUBLIC GLXContext
2315 glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2316 int renderType, GLXContext shareCtx,
2317 Bool direct)
2318 {
2319 XMesaVisual xmvis = (XMesaVisual) config;
2320
2321 if (!dpy || !config ||
2322 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2323 return 0;
2324
2325 return create_context(dpy, xmvis,
2326 shareCtx ? shareCtx->xmesaContext : NULL,
2327 direct,
2328 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2329 }
2330
2331
2332 PUBLIC XVisualInfo *
2333 glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2334 {
2335 return glXGetVisualFromFBConfig(dpy, config);
2336 }
2337
2338
2339 PUBLIC GLXFBConfigSGIX
2340 glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2341 {
2342 XMesaVisual xmvis = find_glx_visual(dpy, vis);
2343 if (!xmvis) {
2344 /* This visual wasn't found with glXChooseVisual() */
2345 xmvis = create_glx_visual(dpy, vis);
2346 }
2347
2348 return (GLXFBConfigSGIX) xmvis;
2349 }
2350
2351
2352
2353 /*** GLX_SGIX_pbuffer ***/
2354
2355 PUBLIC GLXPbufferSGIX
2356 glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2357 unsigned int width, unsigned int height,
2358 int *attribList)
2359 {
2360 XMesaVisual xmvis = (XMesaVisual) config;
2361 XMesaBuffer xmbuf;
2362 const int *attrib;
2363 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2364
2365 (void) dpy;
2366
2367 for (attrib = attribList; attrib && *attrib; attrib++) {
2368 switch (*attrib) {
2369 case GLX_PRESERVED_CONTENTS_SGIX:
2370 attrib++;
2371 preserveContents = *attrib; /* ignored */
2372 break;
2373 case GLX_LARGEST_PBUFFER_SGIX:
2374 attrib++;
2375 useLargest = *attrib; /* ignored */
2376 break;
2377 default:
2378 return 0;
2379 }
2380 }
2381
2382 /* not used at this time */
2383 (void) useLargest;
2384 (void) preserveContents;
2385
2386 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2387 /* A GLXPbuffer handle must be an X Drawable because that's what
2388 * glXMakeCurrent takes.
2389 */
2390 return (GLXPbuffer) xmbuf->drawable;
2391 }
2392
2393
2394 PUBLIC void
2395 glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2396 {
2397 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2398 if (xmbuf) {
2399 XMesaDestroyBuffer(xmbuf);
2400 }
2401 }
2402
2403
2404 PUBLIC int
2405 glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
2406 unsigned int *value)
2407 {
2408 const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2409
2410 if (!xmbuf) {
2411 /* Generate GLXBadPbufferSGIX for bad pbuffer */
2412 return 0;
2413 }
2414
2415 switch (attribute) {
2416 case GLX_PRESERVED_CONTENTS_SGIX:
2417 *value = True;
2418 break;
2419 case GLX_LARGEST_PBUFFER_SGIX:
2420 *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2421 break;
2422 case GLX_WIDTH_SGIX:
2423 *value = xmesa_buffer_width(xmbuf);
2424 break;
2425 case GLX_HEIGHT_SGIX:
2426 *value = xmesa_buffer_height(xmbuf);
2427 break;
2428 case GLX_EVENT_MASK_SGIX:
2429 *value = 0; /* XXX might be wrong */
2430 break;
2431 default:
2432 *value = 0;
2433 }
2434 return 0;
2435 }
2436
2437
2438 PUBLIC void
2439 glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2440 {
2441 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2442 if (xmbuf) {
2443 /* Note: we'll never generate clobber events */
2444 xmbuf->selectedEvents = mask;
2445 }
2446 }
2447
2448
2449 PUBLIC void
2450 glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
2451 unsigned long *mask)
2452 {
2453 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2454 if (xmbuf) {
2455 *mask = xmbuf->selectedEvents;
2456 }
2457 else {
2458 *mask = 0;
2459 }
2460 }
2461
2462
2463
2464 /*** GLX_SGI_cushion ***/
2465
2466 PUBLIC void
2467 glXCushionSGI(Display *dpy, Window win, float cushion)
2468 {
2469 (void) dpy;
2470 (void) win;
2471 (void) cushion;
2472 }
2473
2474
2475
2476 /*** GLX_SGIX_video_resize ***/
2477
2478 PUBLIC int
2479 glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
2480 Window window)
2481 {
2482 (void) dpy;
2483 (void) screen;
2484 (void) channel;
2485 (void) window;
2486 return 0;
2487 }
2488
2489 PUBLIC int
2490 glXChannelRectSGIX(Display *dpy, int screen, int channel,
2491 int x, int y, int w, int h)
2492 {
2493 (void) dpy;
2494 (void) screen;
2495 (void) channel;
2496 (void) x;
2497 (void) y;
2498 (void) w;
2499 (void) h;
2500 return 0;
2501 }
2502
2503 PUBLIC int
2504 glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
2505 int *x, int *y, int *w, int *h)
2506 {
2507 (void) dpy;
2508 (void) screen;
2509 (void) channel;
2510 (void) x;
2511 (void) y;
2512 (void) w;
2513 (void) h;
2514 return 0;
2515 }
2516
2517 PUBLIC int
2518 glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
2519 int *dx, int *dy, int *dw, int *dh)
2520 {
2521 (void) dpy;
2522 (void) screen;
2523 (void) channel;
2524 (void) dx;
2525 (void) dy;
2526 (void) dw;
2527 (void) dh;
2528 return 0;
2529 }
2530
2531 PUBLIC int
2532 glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2533 {
2534 (void) dpy;
2535 (void) screen;
2536 (void) channel;
2537 (void) synctype;
2538 return 0;
2539 }
2540
2541
2542
2543 /*** GLX_SGIX_dmbuffer **/
2544
2545 #if defined(_DM_BUFFER_H_)
2546 PUBLIC Bool
2547 glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
2548 DMparams *params, DMbuffer dmbuffer)
2549 {
2550 (void) dpy;
2551 (void) pbuffer;
2552 (void) params;
2553 (void) dmbuffer;
2554 return False;
2555 }
2556 #endif
2557
2558
2559 /*** GLX_SGIX_swap_group ***/
2560
2561 PUBLIC void
2562 glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2563 {
2564 (void) dpy;
2565 (void) drawable;
2566 (void) member;
2567 }
2568
2569
2570
2571 /*** GLX_SGIX_swap_barrier ***/
2572
2573 PUBLIC void
2574 glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2575 {
2576 (void) dpy;
2577 (void) drawable;
2578 (void) barrier;
2579 }
2580
2581 PUBLIC Bool
2582 glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2583 {
2584 (void) dpy;
2585 (void) screen;
2586 (void) max;
2587 return False;
2588 }
2589
2590
2591
2592 /*** GLX_SUN_get_transparent_index ***/
2593
2594 PUBLIC Status
2595 glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
2596 long *pTransparent)
2597 {
2598 (void) dpy;
2599 (void) overlay;
2600 (void) underlay;
2601 (void) pTransparent;
2602 return 0;
2603 }
2604
2605
2606
2607 /*** GLX_MESA_release_buffers ***/
2608
2609 /*
2610 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2611 * (a window or pixmap) prior to destroying the GLXDrawable.
2612 */
2613 PUBLIC Bool
2614 glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2615 {
2616 XMesaBuffer b = XMesaFindBuffer(dpy, d);
2617 if (b) {
2618 XMesaDestroyBuffer(b);
2619 return True;
2620 }
2621 return False;
2622 }
2623
2624 /*** GLX_EXT_texture_from_pixmap ***/
2625
2626 PUBLIC void
2627 glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2628 const int *attrib_list)
2629 {
2630 XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2631 if (b)
2632 XMesaBindTexImage(dpy, b, buffer, attrib_list);
2633 }
2634
2635 PUBLIC void
2636 glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2637 {
2638 XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2639 if (b)
2640 XMesaReleaseTexImage(dpy, b, buffer);
2641 }
2642
2643
2644
2645 /*** GLX_ARB_create_context ***/
2646
2647 GLXContext
2648 glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
2649 GLXContext shareCtx, Bool direct,
2650 const int *attrib_list)
2651 {
2652 XMesaVisual xmvis = (XMesaVisual) config;
2653 int majorVersion = 1, minorVersion = 0;
2654 int contextFlags = 0x0;
2655 int profileMask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
2656 int renderType = GLX_RGBA_TYPE;
2657 unsigned i;
2658 Bool done = False;
2659 const int contextFlagsAll = (GLX_CONTEXT_DEBUG_BIT_ARB |
2660 GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
2661
2662 /* parse attrib_list */
2663 for (i = 0; !done && attrib_list[i]; i++) {
2664 switch (attrib_list[i]) {
2665 case GLX_CONTEXT_MAJOR_VERSION_ARB:
2666 majorVersion = attrib_list[++i];
2667 break;
2668 case GLX_CONTEXT_MINOR_VERSION_ARB:
2669 minorVersion = attrib_list[++i];
2670 break;
2671 case GLX_CONTEXT_FLAGS_ARB:
2672 contextFlags = attrib_list[++i];
2673 break;
2674 case GLX_CONTEXT_PROFILE_MASK_ARB:
2675 profileMask = attrib_list[++i];
2676 break;
2677 case GLX_RENDER_TYPE:
2678 renderType = attrib_list[++i];
2679 break;
2680 case 0:
2681 /* end of list */
2682 done = True;
2683 break;
2684 default:
2685 /* bad attribute */
2686 /* XXX generate BadValue X Error */
2687 return NULL;
2688 }
2689 }
2690
2691 /* check contextFlags */
2692 if (contextFlags & ~contextFlagsAll) {
2693 return NULL; /* generate BadValue X Error */
2694 }
2695
2696 /* check profileMask */
2697 if (profileMask != GLX_CONTEXT_CORE_PROFILE_BIT_ARB &&
2698 profileMask != GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
2699 return NULL; /* generate BadValue X Error */
2700 }
2701
2702 /* check version (generate BadMatch if bad) */
2703 switch (majorVersion) {
2704 case 1:
2705 if (minorVersion < 0 || minorVersion > 5)
2706 return NULL;
2707 break;
2708 case 2:
2709 if (minorVersion < 0 || minorVersion > 1)
2710 return NULL;
2711 break;
2712 case 3:
2713 if (minorVersion < 0 || minorVersion > 2)
2714 return NULL;
2715 break;
2716 case 4:
2717 if (minorVersion < 0 || minorVersion > 0)
2718 return NULL;
2719 break;
2720 default:
2721 return NULL;
2722 }
2723
2724 if ((contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
2725 majorVersion < 3)
2726 return NULL; /* generate GLXBadProfileARB */
2727
2728 if (renderType == GLX_COLOR_INDEX_TYPE && majorVersion >= 3)
2729 return NULL; /* generate BadMatch */
2730
2731 return create_context(dpy, xmvis,
2732 shareCtx ? shareCtx->xmesaContext : NULL,
2733 direct,
2734 majorVersion, minorVersion,
2735 profileMask, contextFlags);
2736 }