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st/glx: implement glXCreateContextAttribsARB()
[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);
1045 if (!glxCtx->xmesaContext) {
1046 free(glxCtx);
1047 return NULL;
1048 }
1049
1050 glxCtx->isDirect = DEFAULT_DIRECT;
1051 glxCtx->currentDpy = dpy;
1052 glxCtx->xid = (XID) glxCtx; /* self pointer */
1053
1054 return glxCtx;
1055 }
1056
1057
1058 PUBLIC GLXContext
1059 glXCreateContext( Display *dpy, XVisualInfo *visinfo,
1060 GLXContext shareCtx, Bool direct )
1061 {
1062 XMesaVisual xmvis;
1063
1064 xmvis = find_glx_visual( dpy, visinfo );
1065 if (!xmvis) {
1066 /* This visual wasn't found with glXChooseVisual() */
1067 xmvis = create_glx_visual( dpy, visinfo );
1068 if (!xmvis) {
1069 /* unusable visual */
1070 return NULL;
1071 }
1072 }
1073
1074 return create_context(dpy, xmvis,
1075 shareCtx ? shareCtx->xmesaContext : NULL,
1076 direct,
1077 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
1078 }
1079
1080
1081 /* XXX these may have to be removed due to thread-safety issues. */
1082 static GLXContext MakeCurrent_PrevContext = 0;
1083 static GLXDrawable MakeCurrent_PrevDrawable = 0;
1084 static GLXDrawable MakeCurrent_PrevReadable = 0;
1085 static XMesaBuffer MakeCurrent_PrevDrawBuffer = 0;
1086 static XMesaBuffer MakeCurrent_PrevReadBuffer = 0;
1087
1088
1089 /* GLX 1.3 and later */
1090 PUBLIC Bool
1091 glXMakeContextCurrent( Display *dpy, GLXDrawable draw,
1092 GLXDrawable read, GLXContext ctx )
1093 {
1094 GLXContext glxCtx = ctx;
1095 static boolean firsttime = 1, no_rast = 0;
1096
1097 if (firsttime) {
1098 no_rast = getenv("SP_NO_RAST") != NULL;
1099 firsttime = 0;
1100 }
1101
1102 if (ctx && draw && read) {
1103 XMesaBuffer drawBuffer, readBuffer;
1104 XMesaContext xmctx = glxCtx->xmesaContext;
1105
1106 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'draw' */
1107 if (ctx == MakeCurrent_PrevContext
1108 && draw == MakeCurrent_PrevDrawable) {
1109 drawBuffer = MakeCurrent_PrevDrawBuffer;
1110 }
1111 else {
1112 drawBuffer = XMesaFindBuffer( dpy, draw );
1113 }
1114 if (!drawBuffer) {
1115 /* drawable must be a new window! */
1116 drawBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, draw );
1117 if (!drawBuffer) {
1118 /* Out of memory, or context/drawable depth mismatch */
1119 return False;
1120 }
1121 }
1122
1123 /* Find the XMesaBuffer which corresponds to the GLXDrawable 'read' */
1124 if (ctx == MakeCurrent_PrevContext
1125 && read == MakeCurrent_PrevReadable) {
1126 readBuffer = MakeCurrent_PrevReadBuffer;
1127 }
1128 else {
1129 readBuffer = XMesaFindBuffer( dpy, read );
1130 }
1131 if (!readBuffer) {
1132 /* drawable must be a new window! */
1133 readBuffer = XMesaCreateWindowBuffer( xmctx->xm_visual, read );
1134 if (!readBuffer) {
1135 /* Out of memory, or context/drawable depth mismatch */
1136 return False;
1137 }
1138 }
1139
1140 if (no_rast &&
1141 MakeCurrent_PrevContext == ctx &&
1142 MakeCurrent_PrevDrawable == draw &&
1143 MakeCurrent_PrevReadable == read &&
1144 MakeCurrent_PrevDrawBuffer == drawBuffer &&
1145 MakeCurrent_PrevReadBuffer == readBuffer)
1146 return True;
1147
1148 MakeCurrent_PrevContext = ctx;
1149 MakeCurrent_PrevDrawable = draw;
1150 MakeCurrent_PrevReadable = read;
1151 MakeCurrent_PrevDrawBuffer = drawBuffer;
1152 MakeCurrent_PrevReadBuffer = readBuffer;
1153
1154 /* Now make current! */
1155 if (XMesaMakeCurrent2(xmctx, drawBuffer, readBuffer)) {
1156 ctx->currentDpy = dpy;
1157 ctx->currentDrawable = draw;
1158 ctx->currentReadable = read;
1159 SetCurrentContext(ctx);
1160 return True;
1161 }
1162 else {
1163 return False;
1164 }
1165 }
1166 else if (!ctx && !draw && !read) {
1167 /* release current context w/out assigning new one. */
1168 XMesaMakeCurrent2( NULL, NULL, NULL );
1169 MakeCurrent_PrevContext = 0;
1170 MakeCurrent_PrevDrawable = 0;
1171 MakeCurrent_PrevReadable = 0;
1172 MakeCurrent_PrevDrawBuffer = 0;
1173 MakeCurrent_PrevReadBuffer = 0;
1174 SetCurrentContext(NULL);
1175 return True;
1176 }
1177 else {
1178 /* The args must either all be non-zero or all zero.
1179 * This is an error.
1180 */
1181 return False;
1182 }
1183 }
1184
1185
1186 PUBLIC Bool
1187 glXMakeCurrent( Display *dpy, GLXDrawable drawable, GLXContext ctx )
1188 {
1189 return glXMakeContextCurrent( dpy, drawable, drawable, ctx );
1190 }
1191
1192
1193 PUBLIC GLXContext
1194 glXGetCurrentContext(void)
1195 {
1196 return GetCurrentContext();
1197 }
1198
1199
1200 PUBLIC Display *
1201 glXGetCurrentDisplay(void)
1202 {
1203 GLXContext glxCtx = glXGetCurrentContext();
1204
1205 return glxCtx ? glxCtx->currentDpy : NULL;
1206 }
1207
1208
1209 PUBLIC Display *
1210 glXGetCurrentDisplayEXT(void)
1211 {
1212 return glXGetCurrentDisplay();
1213 }
1214
1215
1216 PUBLIC GLXDrawable
1217 glXGetCurrentDrawable(void)
1218 {
1219 GLXContext gc = glXGetCurrentContext();
1220 return gc ? gc->currentDrawable : 0;
1221 }
1222
1223
1224 PUBLIC GLXDrawable
1225 glXGetCurrentReadDrawable(void)
1226 {
1227 GLXContext gc = glXGetCurrentContext();
1228 return gc ? gc->currentReadable : 0;
1229 }
1230
1231
1232 PUBLIC GLXDrawable
1233 glXGetCurrentReadDrawableSGI(void)
1234 {
1235 return glXGetCurrentReadDrawable();
1236 }
1237
1238
1239 PUBLIC GLXPixmap
1240 glXCreateGLXPixmap( Display *dpy, XVisualInfo *visinfo, Pixmap pixmap )
1241 {
1242 XMesaVisual v;
1243 XMesaBuffer b;
1244
1245 v = find_glx_visual( dpy, visinfo );
1246 if (!v) {
1247 v = create_glx_visual( dpy, visinfo );
1248 if (!v) {
1249 /* unusable visual */
1250 return 0;
1251 }
1252 }
1253
1254 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1255 if (!b) {
1256 return 0;
1257 }
1258 return b->drawable;
1259 }
1260
1261
1262 /*** GLX_MESA_pixmap_colormap ***/
1263
1264 PUBLIC GLXPixmap
1265 glXCreateGLXPixmapMESA( Display *dpy, XVisualInfo *visinfo,
1266 Pixmap pixmap, Colormap cmap )
1267 {
1268 XMesaVisual v;
1269 XMesaBuffer b;
1270
1271 v = find_glx_visual( dpy, visinfo );
1272 if (!v) {
1273 v = create_glx_visual( dpy, visinfo );
1274 if (!v) {
1275 /* unusable visual */
1276 return 0;
1277 }
1278 }
1279
1280 b = XMesaCreatePixmapBuffer( v, pixmap, cmap );
1281 if (!b) {
1282 return 0;
1283 }
1284 return b->drawable;
1285 }
1286
1287
1288 PUBLIC void
1289 glXDestroyGLXPixmap( Display *dpy, GLXPixmap pixmap )
1290 {
1291 XMesaBuffer b = XMesaFindBuffer(dpy, pixmap);
1292 if (b) {
1293 XMesaDestroyBuffer(b);
1294 }
1295 else if (_mesa_getenv("MESA_DEBUG")) {
1296 _mesa_warning(NULL, "Mesa: glXDestroyGLXPixmap: invalid pixmap\n");
1297 }
1298 }
1299
1300
1301 PUBLIC void
1302 glXCopyContext( Display *dpy, GLXContext src, GLXContext dst,
1303 unsigned long mask )
1304 {
1305 XMesaContext xm_src = src->xmesaContext;
1306 XMesaContext xm_dst = dst->xmesaContext;
1307 (void) dpy;
1308 if (MakeCurrent_PrevContext == src) {
1309 glFlush();
1310 }
1311 XMesaCopyContext(xm_src, xm_dst, mask);
1312 }
1313
1314
1315 PUBLIC Bool
1316 glXQueryExtension( Display *dpy, int *errorBase, int *eventBase )
1317 {
1318 int op, ev, err;
1319 /* Mesa's GLX isn't really an X extension but we try to act like one. */
1320 if (!XQueryExtension(dpy, GLX_EXTENSION_NAME, &op, &ev, &err))
1321 ev = err = 0;
1322 if (errorBase)
1323 *errorBase = err;
1324 if (eventBase)
1325 *eventBase = ev;
1326 return True; /* we're faking GLX so always return success */
1327 }
1328
1329
1330 PUBLIC void
1331 glXDestroyContext( Display *dpy, GLXContext ctx )
1332 {
1333 GLXContext glxCtx = ctx;
1334 (void) dpy;
1335 MakeCurrent_PrevContext = 0;
1336 MakeCurrent_PrevDrawable = 0;
1337 MakeCurrent_PrevReadable = 0;
1338 MakeCurrent_PrevDrawBuffer = 0;
1339 MakeCurrent_PrevReadBuffer = 0;
1340 XMesaDestroyContext( glxCtx->xmesaContext );
1341 XMesaGarbageCollect();
1342 free(glxCtx);
1343 }
1344
1345
1346 PUBLIC Bool
1347 glXIsDirect( Display *dpy, GLXContext ctx )
1348 {
1349 GLXContext glxCtx = ctx;
1350 (void) ctx;
1351 return glxCtx->isDirect;
1352 }
1353
1354
1355
1356 PUBLIC void
1357 glXSwapBuffers( Display *dpy, GLXDrawable drawable )
1358 {
1359 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1360 static boolean firsttime = 1, no_rast = 0;
1361
1362 if (firsttime) {
1363 no_rast = getenv("SP_NO_RAST") != NULL;
1364 firsttime = 0;
1365 }
1366
1367 if (no_rast)
1368 return;
1369
1370 if (buffer) {
1371 XMesaSwapBuffers(buffer);
1372 }
1373 else if (_mesa_getenv("MESA_DEBUG")) {
1374 _mesa_warning(NULL, "glXSwapBuffers: invalid drawable 0x%x\n",
1375 (int) drawable);
1376 }
1377 }
1378
1379
1380
1381 /*** GLX_MESA_copy_sub_buffer ***/
1382
1383 PUBLIC void
1384 glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable,
1385 int x, int y, int width, int height)
1386 {
1387 XMesaBuffer buffer = XMesaFindBuffer( dpy, drawable );
1388 if (buffer) {
1389 XMesaCopySubBuffer(buffer, x, y, width, height);
1390 }
1391 else if (_mesa_getenv("MESA_DEBUG")) {
1392 _mesa_warning(NULL, "Mesa: glXCopySubBufferMESA: invalid drawable\n");
1393 }
1394 }
1395
1396
1397 PUBLIC Bool
1398 glXQueryVersion( Display *dpy, int *maj, int *min )
1399 {
1400 (void) dpy;
1401 /* Return GLX version, not Mesa version */
1402 assert(CLIENT_MAJOR_VERSION == SERVER_MAJOR_VERSION);
1403 *maj = CLIENT_MAJOR_VERSION;
1404 *min = MIN2( CLIENT_MINOR_VERSION, SERVER_MINOR_VERSION );
1405 return True;
1406 }
1407
1408
1409 /*
1410 * Query the GLX attributes of the given XVisualInfo.
1411 */
1412 static int
1413 get_config( XMesaVisual xmvis, int attrib, int *value, GLboolean fbconfig )
1414 {
1415 ASSERT(xmvis);
1416 switch(attrib) {
1417 case GLX_USE_GL:
1418 if (fbconfig)
1419 return GLX_BAD_ATTRIBUTE;
1420 *value = (int) True;
1421 return 0;
1422 case GLX_BUFFER_SIZE:
1423 *value = xmvis->visinfo->depth;
1424 return 0;
1425 case GLX_LEVEL:
1426 *value = xmvis->mesa_visual.level;
1427 return 0;
1428 case GLX_RGBA:
1429 if (fbconfig)
1430 return GLX_BAD_ATTRIBUTE;
1431 if (xmvis->mesa_visual.rgbMode) {
1432 *value = True;
1433 }
1434 else {
1435 *value = False;
1436 }
1437 return 0;
1438 case GLX_DOUBLEBUFFER:
1439 *value = (int) xmvis->mesa_visual.doubleBufferMode;
1440 return 0;
1441 case GLX_STEREO:
1442 *value = (int) xmvis->mesa_visual.stereoMode;
1443 return 0;
1444 case GLX_AUX_BUFFERS:
1445 *value = xmvis->mesa_visual.numAuxBuffers;
1446 return 0;
1447 case GLX_RED_SIZE:
1448 *value = xmvis->mesa_visual.redBits;
1449 return 0;
1450 case GLX_GREEN_SIZE:
1451 *value = xmvis->mesa_visual.greenBits;
1452 return 0;
1453 case GLX_BLUE_SIZE:
1454 *value = xmvis->mesa_visual.blueBits;
1455 return 0;
1456 case GLX_ALPHA_SIZE:
1457 *value = xmvis->mesa_visual.alphaBits;
1458 return 0;
1459 case GLX_DEPTH_SIZE:
1460 *value = xmvis->mesa_visual.depthBits;
1461 return 0;
1462 case GLX_STENCIL_SIZE:
1463 *value = xmvis->mesa_visual.stencilBits;
1464 return 0;
1465 case GLX_ACCUM_RED_SIZE:
1466 *value = xmvis->mesa_visual.accumRedBits;
1467 return 0;
1468 case GLX_ACCUM_GREEN_SIZE:
1469 *value = xmvis->mesa_visual.accumGreenBits;
1470 return 0;
1471 case GLX_ACCUM_BLUE_SIZE:
1472 *value = xmvis->mesa_visual.accumBlueBits;
1473 return 0;
1474 case GLX_ACCUM_ALPHA_SIZE:
1475 *value = xmvis->mesa_visual.accumAlphaBits;
1476 return 0;
1477
1478 /*
1479 * GLX_EXT_visual_info extension
1480 */
1481 case GLX_X_VISUAL_TYPE_EXT:
1482 switch (xmvis->visinfo->CLASS) {
1483 case StaticGray: *value = GLX_STATIC_GRAY_EXT; return 0;
1484 case GrayScale: *value = GLX_GRAY_SCALE_EXT; return 0;
1485 case StaticColor: *value = GLX_STATIC_GRAY_EXT; return 0;
1486 case PseudoColor: *value = GLX_PSEUDO_COLOR_EXT; return 0;
1487 case TrueColor: *value = GLX_TRUE_COLOR_EXT; return 0;
1488 case DirectColor: *value = GLX_DIRECT_COLOR_EXT; return 0;
1489 }
1490 return 0;
1491 case GLX_TRANSPARENT_TYPE_EXT:
1492 /* normal planes */
1493 *value = GLX_NONE_EXT;
1494 return 0;
1495 case GLX_TRANSPARENT_INDEX_VALUE_EXT:
1496 /* undefined */
1497 return 0;
1498 case GLX_TRANSPARENT_RED_VALUE_EXT:
1499 /* undefined */
1500 return 0;
1501 case GLX_TRANSPARENT_GREEN_VALUE_EXT:
1502 /* undefined */
1503 return 0;
1504 case GLX_TRANSPARENT_BLUE_VALUE_EXT:
1505 /* undefined */
1506 return 0;
1507 case GLX_TRANSPARENT_ALPHA_VALUE_EXT:
1508 /* undefined */
1509 return 0;
1510
1511 /*
1512 * GLX_EXT_visual_info extension
1513 */
1514 case GLX_VISUAL_CAVEAT_EXT:
1515 /* test for zero, just in case */
1516 if (xmvis->mesa_visual.visualRating > 0)
1517 *value = xmvis->mesa_visual.visualRating;
1518 else
1519 *value = GLX_NONE_EXT;
1520 return 0;
1521
1522 /*
1523 * GLX_ARB_multisample
1524 */
1525 case GLX_SAMPLE_BUFFERS_ARB:
1526 *value = 0;
1527 return 0;
1528 case GLX_SAMPLES_ARB:
1529 *value = 0;
1530 return 0;
1531
1532 /*
1533 * For FBConfigs:
1534 */
1535 case GLX_SCREEN_EXT:
1536 if (!fbconfig)
1537 return GLX_BAD_ATTRIBUTE;
1538 *value = xmvis->visinfo->screen;
1539 break;
1540 case GLX_DRAWABLE_TYPE: /*SGIX too */
1541 if (!fbconfig)
1542 return GLX_BAD_ATTRIBUTE;
1543 *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
1544 break;
1545 case GLX_RENDER_TYPE_SGIX:
1546 if (!fbconfig)
1547 return GLX_BAD_ATTRIBUTE;
1548 if (xmvis->mesa_visual.rgbMode)
1549 *value = GLX_RGBA_BIT;
1550 else
1551 *value = GLX_COLOR_INDEX_BIT;
1552 break;
1553 case GLX_X_RENDERABLE_SGIX:
1554 if (!fbconfig)
1555 return GLX_BAD_ATTRIBUTE;
1556 *value = True; /* XXX really? */
1557 break;
1558 case GLX_FBCONFIG_ID_SGIX:
1559 if (!fbconfig)
1560 return GLX_BAD_ATTRIBUTE;
1561 *value = xmvis->visinfo->visualid;
1562 break;
1563 case GLX_MAX_PBUFFER_WIDTH:
1564 if (!fbconfig)
1565 return GLX_BAD_ATTRIBUTE;
1566 /* XXX or MAX_WIDTH? */
1567 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
1568 break;
1569 case GLX_MAX_PBUFFER_HEIGHT:
1570 if (!fbconfig)
1571 return GLX_BAD_ATTRIBUTE;
1572 *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1573 break;
1574 case GLX_MAX_PBUFFER_PIXELS:
1575 if (!fbconfig)
1576 return GLX_BAD_ATTRIBUTE;
1577 *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
1578 DisplayHeight(xmvis->display, xmvis->visinfo->screen);
1579 break;
1580 case GLX_VISUAL_ID:
1581 if (!fbconfig)
1582 return GLX_BAD_ATTRIBUTE;
1583 *value = xmvis->visinfo->visualid;
1584 break;
1585
1586 #ifdef GLX_EXT_texture_from_pixmap
1587 case GLX_BIND_TO_TEXTURE_RGB_EXT:
1588 *value = True; /*XXX*/
1589 break;
1590 case GLX_BIND_TO_TEXTURE_RGBA_EXT:
1591 /* XXX review */
1592 *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
1593 break;
1594 case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
1595 *value = True; /*XXX*/
1596 break;
1597 case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
1598 *value = (GLX_TEXTURE_1D_BIT_EXT |
1599 GLX_TEXTURE_2D_BIT_EXT |
1600 GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
1601 break;
1602 case GLX_Y_INVERTED_EXT:
1603 *value = True; /*XXX*/
1604 break;
1605 #endif
1606
1607 default:
1608 return GLX_BAD_ATTRIBUTE;
1609 }
1610 return Success;
1611 }
1612
1613
1614 PUBLIC int
1615 glXGetConfig( Display *dpy, XVisualInfo *visinfo,
1616 int attrib, int *value )
1617 {
1618 XMesaVisual xmvis;
1619 int k;
1620 if (!dpy || !visinfo)
1621 return GLX_BAD_ATTRIBUTE;
1622
1623 xmvis = find_glx_visual( dpy, visinfo );
1624 if (!xmvis) {
1625 /* this visual wasn't obtained with glXChooseVisual */
1626 xmvis = create_glx_visual( dpy, visinfo );
1627 if (!xmvis) {
1628 /* this visual can't be used for GL rendering */
1629 if (attrib==GLX_USE_GL) {
1630 *value = (int) False;
1631 return 0;
1632 }
1633 else {
1634 return GLX_BAD_VISUAL;
1635 }
1636 }
1637 }
1638
1639 k = get_config(xmvis, attrib, value, GL_FALSE);
1640 return k;
1641 }
1642
1643
1644 PUBLIC void
1645 glXWaitGL( void )
1646 {
1647 XMesaContext xmesa = XMesaGetCurrentContext();
1648 XMesaFlush( xmesa );
1649 }
1650
1651
1652
1653 PUBLIC void
1654 glXWaitX( void )
1655 {
1656 XMesaContext xmesa = XMesaGetCurrentContext();
1657 XMesaFlush( xmesa );
1658 }
1659
1660
1661 static const char *
1662 get_extensions( void )
1663 {
1664 return EXTENSIONS;
1665 }
1666
1667
1668
1669 /* GLX 1.1 and later */
1670 PUBLIC const char *
1671 glXQueryExtensionsString( Display *dpy, int screen )
1672 {
1673 (void) dpy;
1674 (void) screen;
1675 return get_extensions();
1676 }
1677
1678
1679
1680 /* GLX 1.1 and later */
1681 PUBLIC const char *
1682 glXQueryServerString( Display *dpy, int screen, int name )
1683 {
1684 static char version[1000];
1685 sprintf(version, "%d.%d %s",
1686 SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, xmesa_get_name());
1687
1688 (void) dpy;
1689 (void) screen;
1690
1691 switch (name) {
1692 case GLX_EXTENSIONS:
1693 return get_extensions();
1694 case GLX_VENDOR:
1695 return VENDOR;
1696 case GLX_VERSION:
1697 return version;
1698 default:
1699 return NULL;
1700 }
1701 }
1702
1703
1704
1705 /* GLX 1.1 and later */
1706 PUBLIC const char *
1707 glXGetClientString( Display *dpy, int name )
1708 {
1709 static char version[1000];
1710 sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
1711 CLIENT_MINOR_VERSION, xmesa_get_name());
1712
1713 (void) dpy;
1714
1715 switch (name) {
1716 case GLX_EXTENSIONS:
1717 return get_extensions();
1718 case GLX_VENDOR:
1719 return VENDOR;
1720 case GLX_VERSION:
1721 return version;
1722 default:
1723 return NULL;
1724 }
1725 }
1726
1727
1728
1729 /*
1730 * GLX 1.3 and later
1731 */
1732
1733
1734 PUBLIC int
1735 glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config,
1736 int attribute, int *value)
1737 {
1738 XMesaVisual v = (XMesaVisual) config;
1739 (void) dpy;
1740 (void) config;
1741
1742 if (!dpy || !config || !value)
1743 return -1;
1744
1745 return get_config(v, attribute, value, GL_TRUE);
1746 }
1747
1748
1749 PUBLIC GLXFBConfig *
1750 glXGetFBConfigs( Display *dpy, int screen, int *nelements )
1751 {
1752 XVisualInfo *visuals, visTemplate;
1753 const long visMask = VisualScreenMask;
1754 int i;
1755
1756 /* Get list of all X visuals */
1757 visTemplate.screen = screen;
1758 visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
1759 if (*nelements > 0) {
1760 XMesaVisual *results;
1761 results = (XMesaVisual *) malloc(*nelements * sizeof(XMesaVisual));
1762 if (!results) {
1763 *nelements = 0;
1764 return NULL;
1765 }
1766 for (i = 0; i < *nelements; i++) {
1767 results[i] = create_glx_visual(dpy, visuals + i);
1768 if (!results[i]) {
1769 *nelements = i;
1770 break;
1771 }
1772 }
1773 return (GLXFBConfig *) results;
1774 }
1775 return NULL;
1776 }
1777
1778
1779 PUBLIC GLXFBConfig *
1780 glXChooseFBConfig(Display *dpy, int screen,
1781 const int *attribList, int *nitems)
1782 {
1783 XMesaVisual xmvis;
1784
1785 if (!attribList || !attribList[0]) {
1786 /* return list of all configs (per GLX_SGIX_fbconfig spec) */
1787 return glXGetFBConfigs(dpy, screen, nitems);
1788 }
1789
1790 xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
1791 if (xmvis) {
1792 GLXFBConfig *config = (GLXFBConfig *) malloc(sizeof(XMesaVisual));
1793 if (!config) {
1794 *nitems = 0;
1795 return NULL;
1796 }
1797 *nitems = 1;
1798 config[0] = (GLXFBConfig) xmvis;
1799 return (GLXFBConfig *) config;
1800 }
1801 else {
1802 *nitems = 0;
1803 return NULL;
1804 }
1805 }
1806
1807
1808 PUBLIC XVisualInfo *
1809 glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
1810 {
1811 if (dpy && config) {
1812 XMesaVisual xmvis = (XMesaVisual) config;
1813 #if 0
1814 return xmvis->vishandle;
1815 #else
1816 /* create a new vishandle - the cached one may be stale */
1817 xmvis->vishandle = (XVisualInfo *) malloc(sizeof(XVisualInfo));
1818 if (xmvis->vishandle) {
1819 memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
1820 }
1821 return xmvis->vishandle;
1822 #endif
1823 }
1824 else {
1825 return NULL;
1826 }
1827 }
1828
1829
1830 PUBLIC GLXWindow
1831 glXCreateWindow(Display *dpy, GLXFBConfig config, Window win,
1832 const int *attribList)
1833 {
1834 XMesaVisual xmvis = (XMesaVisual) config;
1835 XMesaBuffer xmbuf;
1836 if (!xmvis)
1837 return 0;
1838
1839 xmbuf = XMesaCreateWindowBuffer(xmvis, win);
1840 if (!xmbuf)
1841 return 0;
1842
1843 (void) dpy;
1844 (void) attribList; /* Ignored in GLX 1.3 */
1845
1846 return win; /* A hack for now */
1847 }
1848
1849
1850 PUBLIC void
1851 glXDestroyWindow( Display *dpy, GLXWindow window )
1852 {
1853 XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable) window);
1854 if (b)
1855 XMesaDestroyBuffer(b);
1856 /* don't destroy X window */
1857 }
1858
1859
1860 /* XXX untested */
1861 PUBLIC GLXPixmap
1862 glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap,
1863 const int *attribList)
1864 {
1865 XMesaVisual v = (XMesaVisual) config;
1866 XMesaBuffer b;
1867 const int *attr;
1868 int target = 0, format = 0, mipmap = 0;
1869 int value;
1870
1871 if (!dpy || !config || !pixmap)
1872 return 0;
1873
1874 for (attr = attribList; attr && *attr; attr++) {
1875 switch (*attr) {
1876 case GLX_TEXTURE_FORMAT_EXT:
1877 attr++;
1878 switch (*attr) {
1879 case GLX_TEXTURE_FORMAT_NONE_EXT:
1880 case GLX_TEXTURE_FORMAT_RGB_EXT:
1881 case GLX_TEXTURE_FORMAT_RGBA_EXT:
1882 format = *attr;
1883 break;
1884 default:
1885 /* error */
1886 return 0;
1887 }
1888 break;
1889 case GLX_TEXTURE_TARGET_EXT:
1890 attr++;
1891 switch (*attr) {
1892 case GLX_TEXTURE_1D_EXT:
1893 case GLX_TEXTURE_2D_EXT:
1894 case GLX_TEXTURE_RECTANGLE_EXT:
1895 target = *attr;
1896 break;
1897 default:
1898 /* error */
1899 return 0;
1900 }
1901 break;
1902 case GLX_MIPMAP_TEXTURE_EXT:
1903 attr++;
1904 if (*attr)
1905 mipmap = 1;
1906 break;
1907 default:
1908 /* error */
1909 return 0;
1910 }
1911 }
1912
1913 if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
1914 if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
1915 &value, GL_TRUE) != Success
1916 || !value) {
1917 return 0; /* error! */
1918 }
1919 }
1920 else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
1921 if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
1922 &value, GL_TRUE) != Success
1923 || !value) {
1924 return 0; /* error! */
1925 }
1926 }
1927 if (mipmap) {
1928 if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
1929 &value, GL_TRUE) != Success
1930 || !value) {
1931 return 0; /* error! */
1932 }
1933 }
1934 if (target == GLX_TEXTURE_1D_EXT) {
1935 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1936 &value, GL_TRUE) != Success
1937 || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
1938 return 0; /* error! */
1939 }
1940 }
1941 else if (target == GLX_TEXTURE_2D_EXT) {
1942 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1943 &value, GL_TRUE) != Success
1944 || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
1945 return 0; /* error! */
1946 }
1947 }
1948 if (target == GLX_TEXTURE_RECTANGLE_EXT) {
1949 if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
1950 &value, GL_TRUE) != Success
1951 || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
1952 return 0; /* error! */
1953 }
1954 }
1955
1956 if (format || target || mipmap) {
1957 /* texture from pixmap */
1958 b = XMesaCreatePixmapTextureBuffer(v, pixmap, 0, format, target, mipmap);
1959 }
1960 else {
1961 b = XMesaCreatePixmapBuffer( v, pixmap, 0 );
1962 }
1963 if (!b) {
1964 return 0;
1965 }
1966
1967 return pixmap;
1968 }
1969
1970
1971 PUBLIC void
1972 glXDestroyPixmap( Display *dpy, GLXPixmap pixmap )
1973 {
1974 XMesaBuffer b = XMesaFindBuffer(dpy, (Drawable)pixmap);
1975 if (b)
1976 XMesaDestroyBuffer(b);
1977 /* don't destroy X pixmap */
1978 }
1979
1980
1981 PUBLIC GLXPbuffer
1982 glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
1983 {
1984 XMesaVisual xmvis = (XMesaVisual) config;
1985 XMesaBuffer xmbuf;
1986 const int *attrib;
1987 int width = 0, height = 0;
1988 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
1989
1990 (void) dpy;
1991
1992 for (attrib = attribList; *attrib; attrib++) {
1993 switch (*attrib) {
1994 case GLX_PBUFFER_WIDTH:
1995 attrib++;
1996 width = *attrib;
1997 break;
1998 case GLX_PBUFFER_HEIGHT:
1999 attrib++;
2000 height = *attrib;
2001 break;
2002 case GLX_PRESERVED_CONTENTS:
2003 attrib++;
2004 preserveContents = *attrib;
2005 break;
2006 case GLX_LARGEST_PBUFFER:
2007 attrib++;
2008 useLargest = *attrib;
2009 break;
2010 default:
2011 return 0;
2012 }
2013 }
2014
2015 if (width == 0 || height == 0)
2016 return 0;
2017
2018 if (width > MAX_WIDTH || height > MAX_HEIGHT) {
2019 /* If allocation would have failed and GLX_LARGEST_PBUFFER is set,
2020 * allocate the largest possible buffer.
2021 */
2022 if (useLargest) {
2023 width = MAX_WIDTH;
2024 height = MAX_HEIGHT;
2025 }
2026 }
2027
2028 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2029 /* A GLXPbuffer handle must be an X Drawable because that's what
2030 * glXMakeCurrent takes.
2031 */
2032 if (xmbuf) {
2033 xmbuf->largestPbuffer = useLargest;
2034 xmbuf->preservedContents = preserveContents;
2035 return (GLXPbuffer) xmbuf->drawable;
2036 }
2037 else {
2038 return 0;
2039 }
2040 }
2041
2042
2043 PUBLIC void
2044 glXDestroyPbuffer( Display *dpy, GLXPbuffer pbuf )
2045 {
2046 XMesaBuffer b = XMesaFindBuffer(dpy, pbuf);
2047 if (b) {
2048 XMesaDestroyBuffer(b);
2049 }
2050 }
2051
2052
2053 PUBLIC void
2054 glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute,
2055 unsigned int *value)
2056 {
2057 GLuint width, height;
2058 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, draw);
2059 if (!xmbuf)
2060 return;
2061
2062 /* make sure buffer's dimensions are up to date */
2063 xmesa_get_window_size(dpy, xmbuf, &width, &height);
2064
2065 switch (attribute) {
2066 case GLX_WIDTH:
2067 *value = width;
2068 break;
2069 case GLX_HEIGHT:
2070 *value = height;
2071 break;
2072 case GLX_PRESERVED_CONTENTS:
2073 *value = xmbuf->preservedContents;
2074 break;
2075 case GLX_LARGEST_PBUFFER:
2076 *value = xmbuf->largestPbuffer;
2077 break;
2078 case GLX_FBCONFIG_ID:
2079 *value = xmbuf->xm_visual->visinfo->visualid;
2080 return;
2081 #ifdef GLX_EXT_texture_from_pixmap
2082 case GLX_TEXTURE_FORMAT_EXT:
2083 *value = xmbuf->TextureFormat;
2084 break;
2085 case GLX_TEXTURE_TARGET_EXT:
2086 *value = xmbuf->TextureTarget;
2087 break;
2088 case GLX_MIPMAP_TEXTURE_EXT:
2089 *value = xmbuf->TextureMipmap;
2090 break;
2091 #endif
2092
2093 default:
2094 return; /* raise BadValue error */
2095 }
2096 }
2097
2098
2099 PUBLIC GLXContext
2100 glXCreateNewContext( Display *dpy, GLXFBConfig config,
2101 int renderType, GLXContext shareCtx, Bool direct )
2102 {
2103 XMesaVisual xmvis = (XMesaVisual) config;
2104
2105 if (!dpy || !config ||
2106 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2107 return 0;
2108
2109 return create_context(dpy, xmvis,
2110 shareCtx ? shareCtx->xmesaContext : NULL,
2111 direct,
2112 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2113 }
2114
2115
2116 PUBLIC int
2117 glXQueryContext( Display *dpy, GLXContext ctx, int attribute, int *value )
2118 {
2119 GLXContext glxCtx = ctx;
2120 XMesaContext xmctx = glxCtx->xmesaContext;
2121
2122 (void) dpy;
2123 (void) ctx;
2124
2125 switch (attribute) {
2126 case GLX_FBCONFIG_ID:
2127 *value = xmctx->xm_visual->visinfo->visualid;
2128 break;
2129 case GLX_RENDER_TYPE:
2130 if (xmctx->xm_visual->mesa_visual.rgbMode)
2131 *value = GLX_RGBA_TYPE;
2132 else
2133 *value = GLX_COLOR_INDEX_TYPE;
2134 break;
2135 case GLX_SCREEN:
2136 *value = 0;
2137 return Success;
2138 default:
2139 return GLX_BAD_ATTRIBUTE;
2140 }
2141 return 0;
2142 }
2143
2144
2145 PUBLIC void
2146 glXSelectEvent( Display *dpy, GLXDrawable drawable, unsigned long mask )
2147 {
2148 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2149 if (xmbuf)
2150 xmbuf->selectedEvents = mask;
2151 }
2152
2153
2154 PUBLIC void
2155 glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
2156 {
2157 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2158 if (xmbuf)
2159 *mask = xmbuf->selectedEvents;
2160 else
2161 *mask = 0;
2162 }
2163
2164
2165
2166 /*** GLX_SGI_swap_control ***/
2167
2168 PUBLIC int
2169 glXSwapIntervalSGI(int interval)
2170 {
2171 (void) interval;
2172 return 0;
2173 }
2174
2175
2176
2177 /*** GLX_SGI_video_sync ***/
2178
2179 static unsigned int FrameCounter = 0;
2180
2181 PUBLIC int
2182 glXGetVideoSyncSGI(unsigned int *count)
2183 {
2184 /* this is a bogus implementation */
2185 *count = FrameCounter++;
2186 return 0;
2187 }
2188
2189 PUBLIC int
2190 glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
2191 {
2192 if (divisor <= 0 || remainder < 0)
2193 return GLX_BAD_VALUE;
2194 /* this is a bogus implementation */
2195 FrameCounter++;
2196 while (FrameCounter % divisor != remainder)
2197 FrameCounter++;
2198 *count = FrameCounter;
2199 return 0;
2200 }
2201
2202
2203
2204 /*** GLX_SGI_make_current_read ***/
2205
2206 PUBLIC Bool
2207 glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read,
2208 GLXContext ctx)
2209 {
2210 return glXMakeContextCurrent( dpy, draw, read, ctx );
2211 }
2212
2213 /* not used
2214 static GLXDrawable
2215 glXGetCurrentReadDrawableSGI(void)
2216 {
2217 return 0;
2218 }
2219 */
2220
2221
2222 /*** GLX_SGIX_video_source ***/
2223 #if defined(_VL_H)
2224
2225 PUBLIC GLXVideoSourceSGIX
2226 glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server,
2227 VLPath path, int nodeClass, VLNode drainNode)
2228 {
2229 (void) dpy;
2230 (void) screen;
2231 (void) server;
2232 (void) path;
2233 (void) nodeClass;
2234 (void) drainNode;
2235 return 0;
2236 }
2237
2238 PUBLIC void
2239 glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
2240 {
2241 (void) dpy;
2242 (void) src;
2243 }
2244
2245 #endif
2246
2247
2248 /*** GLX_EXT_import_context ***/
2249
2250 PUBLIC void
2251 glXFreeContextEXT(Display *dpy, GLXContext context)
2252 {
2253 (void) dpy;
2254 (void) context;
2255 }
2256
2257 PUBLIC GLXContextID
2258 glXGetContextIDEXT(const GLXContext context)
2259 {
2260 (void) context;
2261 return 0;
2262 }
2263
2264 PUBLIC GLXContext
2265 glXImportContextEXT(Display *dpy, GLXContextID contextID)
2266 {
2267 (void) dpy;
2268 (void) contextID;
2269 return 0;
2270 }
2271
2272 PUBLIC int
2273 glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,
2274 int *value)
2275 {
2276 (void) dpy;
2277 (void) context;
2278 (void) attribute;
2279 (void) value;
2280 return 0;
2281 }
2282
2283
2284
2285 /*** GLX_SGIX_fbconfig ***/
2286
2287 PUBLIC int
2288 glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config,
2289 int attribute, int *value)
2290 {
2291 return glXGetFBConfigAttrib(dpy, config, attribute, value);
2292 }
2293
2294 PUBLIC GLXFBConfigSGIX *
2295 glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list,
2296 int *nelements)
2297 {
2298 return (GLXFBConfig *) glXChooseFBConfig(dpy, screen,
2299 attrib_list, nelements);
2300 }
2301
2302
2303 PUBLIC GLXPixmap
2304 glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2305 Pixmap pixmap)
2306 {
2307 XMesaVisual xmvis = (XMesaVisual) config;
2308 XMesaBuffer xmbuf = XMesaCreatePixmapBuffer(xmvis, pixmap, 0);
2309 return xmbuf->drawable; /* need to return an X ID */
2310 }
2311
2312
2313 PUBLIC GLXContext
2314 glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config,
2315 int renderType, GLXContext shareCtx,
2316 Bool direct)
2317 {
2318 XMesaVisual xmvis = (XMesaVisual) config;
2319
2320 if (!dpy || !config ||
2321 (renderType != GLX_RGBA_TYPE && renderType != GLX_COLOR_INDEX_TYPE))
2322 return 0;
2323
2324 return create_context(dpy, xmvis,
2325 shareCtx ? shareCtx->xmesaContext : NULL,
2326 direct,
2327 1, 0, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, 0x0);
2328 }
2329
2330
2331 PUBLIC XVisualInfo *
2332 glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
2333 {
2334 return glXGetVisualFromFBConfig(dpy, config);
2335 }
2336
2337
2338 PUBLIC GLXFBConfigSGIX
2339 glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
2340 {
2341 XMesaVisual xmvis = find_glx_visual(dpy, vis);
2342 if (!xmvis) {
2343 /* This visual wasn't found with glXChooseVisual() */
2344 xmvis = create_glx_visual(dpy, vis);
2345 }
2346
2347 return (GLXFBConfigSGIX) xmvis;
2348 }
2349
2350
2351
2352 /*** GLX_SGIX_pbuffer ***/
2353
2354 PUBLIC GLXPbufferSGIX
2355 glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config,
2356 unsigned int width, unsigned int height,
2357 int *attribList)
2358 {
2359 XMesaVisual xmvis = (XMesaVisual) config;
2360 XMesaBuffer xmbuf;
2361 const int *attrib;
2362 GLboolean useLargest = GL_FALSE, preserveContents = GL_FALSE;
2363
2364 (void) dpy;
2365
2366 for (attrib = attribList; attrib && *attrib; attrib++) {
2367 switch (*attrib) {
2368 case GLX_PRESERVED_CONTENTS_SGIX:
2369 attrib++;
2370 preserveContents = *attrib; /* ignored */
2371 break;
2372 case GLX_LARGEST_PBUFFER_SGIX:
2373 attrib++;
2374 useLargest = *attrib; /* ignored */
2375 break;
2376 default:
2377 return 0;
2378 }
2379 }
2380
2381 /* not used at this time */
2382 (void) useLargest;
2383 (void) preserveContents;
2384
2385 xmbuf = XMesaCreatePBuffer( xmvis, 0, width, height);
2386 /* A GLXPbuffer handle must be an X Drawable because that's what
2387 * glXMakeCurrent takes.
2388 */
2389 return (GLXPbuffer) xmbuf->drawable;
2390 }
2391
2392
2393 PUBLIC void
2394 glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
2395 {
2396 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2397 if (xmbuf) {
2398 XMesaDestroyBuffer(xmbuf);
2399 }
2400 }
2401
2402
2403 PUBLIC int
2404 glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute,
2405 unsigned int *value)
2406 {
2407 const XMesaBuffer xmbuf = XMesaFindBuffer(dpy, pbuf);
2408
2409 if (!xmbuf) {
2410 /* Generate GLXBadPbufferSGIX for bad pbuffer */
2411 return 0;
2412 }
2413
2414 switch (attribute) {
2415 case GLX_PRESERVED_CONTENTS_SGIX:
2416 *value = True;
2417 break;
2418 case GLX_LARGEST_PBUFFER_SGIX:
2419 *value = xmesa_buffer_width(xmbuf) * xmesa_buffer_height(xmbuf);
2420 break;
2421 case GLX_WIDTH_SGIX:
2422 *value = xmesa_buffer_width(xmbuf);
2423 break;
2424 case GLX_HEIGHT_SGIX:
2425 *value = xmesa_buffer_height(xmbuf);
2426 break;
2427 case GLX_EVENT_MASK_SGIX:
2428 *value = 0; /* XXX might be wrong */
2429 break;
2430 default:
2431 *value = 0;
2432 }
2433 return 0;
2434 }
2435
2436
2437 PUBLIC void
2438 glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
2439 {
2440 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2441 if (xmbuf) {
2442 /* Note: we'll never generate clobber events */
2443 xmbuf->selectedEvents = mask;
2444 }
2445 }
2446
2447
2448 PUBLIC void
2449 glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable,
2450 unsigned long *mask)
2451 {
2452 XMesaBuffer xmbuf = XMesaFindBuffer(dpy, drawable);
2453 if (xmbuf) {
2454 *mask = xmbuf->selectedEvents;
2455 }
2456 else {
2457 *mask = 0;
2458 }
2459 }
2460
2461
2462
2463 /*** GLX_SGI_cushion ***/
2464
2465 PUBLIC void
2466 glXCushionSGI(Display *dpy, Window win, float cushion)
2467 {
2468 (void) dpy;
2469 (void) win;
2470 (void) cushion;
2471 }
2472
2473
2474
2475 /*** GLX_SGIX_video_resize ***/
2476
2477 PUBLIC int
2478 glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel,
2479 Window window)
2480 {
2481 (void) dpy;
2482 (void) screen;
2483 (void) channel;
2484 (void) window;
2485 return 0;
2486 }
2487
2488 PUBLIC int
2489 glXChannelRectSGIX(Display *dpy, int screen, int channel,
2490 int x, int y, int w, int h)
2491 {
2492 (void) dpy;
2493 (void) screen;
2494 (void) channel;
2495 (void) x;
2496 (void) y;
2497 (void) w;
2498 (void) h;
2499 return 0;
2500 }
2501
2502 PUBLIC int
2503 glXQueryChannelRectSGIX(Display *dpy, int screen, int channel,
2504 int *x, int *y, int *w, int *h)
2505 {
2506 (void) dpy;
2507 (void) screen;
2508 (void) channel;
2509 (void) x;
2510 (void) y;
2511 (void) w;
2512 (void) h;
2513 return 0;
2514 }
2515
2516 PUBLIC int
2517 glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel,
2518 int *dx, int *dy, int *dw, int *dh)
2519 {
2520 (void) dpy;
2521 (void) screen;
2522 (void) channel;
2523 (void) dx;
2524 (void) dy;
2525 (void) dw;
2526 (void) dh;
2527 return 0;
2528 }
2529
2530 PUBLIC int
2531 glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
2532 {
2533 (void) dpy;
2534 (void) screen;
2535 (void) channel;
2536 (void) synctype;
2537 return 0;
2538 }
2539
2540
2541
2542 /*** GLX_SGIX_dmbuffer **/
2543
2544 #if defined(_DM_BUFFER_H_)
2545 PUBLIC Bool
2546 glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer,
2547 DMparams *params, DMbuffer dmbuffer)
2548 {
2549 (void) dpy;
2550 (void) pbuffer;
2551 (void) params;
2552 (void) dmbuffer;
2553 return False;
2554 }
2555 #endif
2556
2557
2558 /*** GLX_SGIX_swap_group ***/
2559
2560 PUBLIC void
2561 glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
2562 {
2563 (void) dpy;
2564 (void) drawable;
2565 (void) member;
2566 }
2567
2568
2569
2570 /*** GLX_SGIX_swap_barrier ***/
2571
2572 PUBLIC void
2573 glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
2574 {
2575 (void) dpy;
2576 (void) drawable;
2577 (void) barrier;
2578 }
2579
2580 PUBLIC Bool
2581 glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
2582 {
2583 (void) dpy;
2584 (void) screen;
2585 (void) max;
2586 return False;
2587 }
2588
2589
2590
2591 /*** GLX_SUN_get_transparent_index ***/
2592
2593 PUBLIC Status
2594 glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay,
2595 long *pTransparent)
2596 {
2597 (void) dpy;
2598 (void) overlay;
2599 (void) underlay;
2600 (void) pTransparent;
2601 return 0;
2602 }
2603
2604
2605
2606 /*** GLX_MESA_release_buffers ***/
2607
2608 /*
2609 * Release the depth, stencil, accum buffers attached to a GLXDrawable
2610 * (a window or pixmap) prior to destroying the GLXDrawable.
2611 */
2612 PUBLIC Bool
2613 glXReleaseBuffersMESA( Display *dpy, GLXDrawable d )
2614 {
2615 XMesaBuffer b = XMesaFindBuffer(dpy, d);
2616 if (b) {
2617 XMesaDestroyBuffer(b);
2618 return True;
2619 }
2620 return False;
2621 }
2622
2623 /*** GLX_EXT_texture_from_pixmap ***/
2624
2625 PUBLIC void
2626 glXBindTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer,
2627 const int *attrib_list)
2628 {
2629 XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2630 if (b)
2631 XMesaBindTexImage(dpy, b, buffer, attrib_list);
2632 }
2633
2634 PUBLIC void
2635 glXReleaseTexImageEXT(Display *dpy, GLXDrawable drawable, int buffer)
2636 {
2637 XMesaBuffer b = XMesaFindBuffer(dpy, drawable);
2638 if (b)
2639 XMesaReleaseTexImage(dpy, b, buffer);
2640 }
2641
2642
2643
2644 /*** GLX_ARB_create_context ***/
2645
2646 GLXContext
2647 glXCreateContextAttribsARB(Display *dpy, GLXFBConfig config,
2648 GLXContext shareCtx, Bool direct,
2649 const int *attrib_list)
2650 {
2651 XMesaVisual xmvis = (XMesaVisual) config;
2652 int majorVersion = 1, minorVersion = 0;
2653 int contextFlags = 0x0;
2654 int profileMask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
2655 int renderType = GLX_RGBA_TYPE;
2656 unsigned i;
2657 Bool done = False;
2658 const int contextFlagsAll = (GLX_CONTEXT_DEBUG_BIT_ARB |
2659 GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB);
2660
2661 /* parse attrib_list */
2662 for (i = 0; !done && attrib_list[i]; i++) {
2663 switch (attrib_list[i]) {
2664 case GLX_CONTEXT_MAJOR_VERSION_ARB:
2665 majorVersion = attrib_list[++i];
2666 break;
2667 case GLX_CONTEXT_MINOR_VERSION_ARB:
2668 minorVersion = attrib_list[++i];
2669 break;
2670 case GLX_CONTEXT_FLAGS_ARB:
2671 contextFlags = attrib_list[++i];
2672 break;
2673 case GLX_CONTEXT_PROFILE_MASK_ARB:
2674 profileMask = attrib_list[++i];
2675 break;
2676 case GLX_RENDER_TYPE:
2677 renderType = attrib_list[++i];
2678 break;
2679 case 0:
2680 /* end of list */
2681 done = True;
2682 break;
2683 default:
2684 /* bad attribute */
2685 /* XXX generate BadValue X Error */
2686 return NULL;
2687 }
2688 }
2689
2690 /* check contextFlags */
2691 if (contextFlags & ~contextFlagsAll) {
2692 return NULL; /* generate BadValue X Error */
2693 }
2694
2695 /* check profileMask */
2696 if (profileMask != GLX_CONTEXT_CORE_PROFILE_BIT_ARB &&
2697 profileMask != GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
2698 return NULL; /* generate BadValue X Error */
2699 }
2700
2701 /* check version (generate BadMatch if bad) */
2702 switch (majorVersion) {
2703 case 1:
2704 if (minorVersion < 0 || minorVersion > 5)
2705 return NULL;
2706 break;
2707 case 2:
2708 if (minorVersion < 0 || minorVersion > 1)
2709 return NULL;
2710 break;
2711 case 3:
2712 if (minorVersion < 0 || minorVersion > 2)
2713 return NULL;
2714 break;
2715 case 4:
2716 if (minorVersion < 0 || minorVersion > 0)
2717 return NULL;
2718 break;
2719 default:
2720 return NULL;
2721 }
2722
2723 if ((contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
2724 majorVersion < 3)
2725 return NULL; /* generate GLXBadProfileARB */
2726
2727 if (renderType == GLX_COLOR_INDEX_TYPE && majorVersion >= 3)
2728 return NULL; /* generate BadMatch */
2729
2730 return create_context(dpy, xmvis,
2731 shareCtx ? shareCtx->xmesaContext : NULL,
2732 direct,
2733 majorVersion, minorVersion,
2734 profileMask, contextFlags);
2735 }