Added few more stubs so that control reaches to DestroyDevice().
[mesa.git] / src / glx / glxcmds.c
1 /*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31 /**
32 * \file glxcmds.c
33 * Client-side GLX interface.
34 */
35
36 #include "glxclient.h"
37 #include "glapi.h"
38 #include "glxextensions.h"
39 #include "indirect.h"
40 #include "glx_error.h"
41
42 #ifdef GLX_DIRECT_RENDERING
43 #ifdef GLX_USE_APPLEGL
44 #include "apple/apple_glx_context.h"
45 #include "apple/apple_glx.h"
46 #include "util/debug.h"
47 #else
48 #include <sys/time.h>
49 #ifndef GLX_USE_WINDOWSGL
50 #include <X11/extensions/xf86vmode.h>
51 #endif /* GLX_USE_WINDOWSGL */
52 #endif
53 #endif
54
55 #include <X11/Xlib-xcb.h>
56 #include <xcb/xcb.h>
57 #include <xcb/glx.h>
58 #include "GL/mesa_glinterop.h"
59
60 static const char __glXGLXClientVendorName[] = "Mesa Project and SGI";
61 static const char __glXGLXClientVersion[] = "1.4";
62
63 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
64
65 /**
66 * Get the __DRIdrawable for the drawable associated with a GLXContext
67 *
68 * \param dpy The display associated with \c drawable.
69 * \param drawable GLXDrawable whose __DRIdrawable part is to be retrieved.
70 * \param scrn_num If non-NULL, the drawables screen is stored there
71 * \returns A pointer to the context's __DRIdrawable on success, or NULL if
72 * the drawable is not associated with a direct-rendering context.
73 */
74 _X_HIDDEN __GLXDRIdrawable *
75 GetGLXDRIDrawable(Display * dpy, GLXDrawable drawable)
76 {
77 struct glx_display *priv = __glXInitialize(dpy);
78 __GLXDRIdrawable *pdraw;
79
80 if (priv == NULL)
81 return NULL;
82
83 if (__glxHashLookup(priv->drawHash, drawable, (void *) &pdraw) == 0)
84 return pdraw;
85
86 return NULL;
87 }
88
89 #endif
90
91 _X_HIDDEN struct glx_drawable *
92 GetGLXDrawable(Display *dpy, GLXDrawable drawable)
93 {
94 struct glx_display *priv = __glXInitialize(dpy);
95 struct glx_drawable *glxDraw;
96
97 if (priv == NULL)
98 return NULL;
99
100 if (__glxHashLookup(priv->glXDrawHash, drawable, (void *) &glxDraw) == 0)
101 return glxDraw;
102
103 return NULL;
104 }
105
106 _X_HIDDEN int
107 InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw, XID xDrawable,
108 GLXDrawable drawable)
109 {
110 struct glx_display *priv = __glXInitialize(dpy);
111
112 if (!priv)
113 return -1;
114
115 glxDraw->xDrawable = xDrawable;
116 glxDraw->drawable = drawable;
117 glxDraw->lastEventSbc = 0;
118 glxDraw->eventSbcWrap = 0;
119
120 return __glxHashInsert(priv->glXDrawHash, drawable, glxDraw);
121 }
122
123 _X_HIDDEN void
124 DestroyGLXDrawable(Display *dpy, GLXDrawable drawable)
125 {
126 struct glx_display *priv = __glXInitialize(dpy);
127 struct glx_drawable *glxDraw;
128
129 if (!priv)
130 return;
131
132 glxDraw = GetGLXDrawable(dpy, drawable);
133 __glxHashDelete(priv->glXDrawHash, drawable);
134 free(glxDraw);
135 }
136
137 /**
138 * Get the GLX per-screen data structure associated with a GLX context.
139 *
140 * \param dpy Display for which the GLX per-screen information is to be
141 * retrieved.
142 * \param scrn Screen on \c dpy for which the GLX per-screen information is
143 * to be retrieved.
144 * \returns A pointer to the GLX per-screen data if \c dpy and \c scrn
145 * specify a valid GLX screen, or NULL otherwise.
146 *
147 * \todo Should this function validate that \c scrn is within the screen
148 * number range for \c dpy?
149 */
150
151 _X_HIDDEN struct glx_screen *
152 GetGLXScreenConfigs(Display * dpy, int scrn)
153 {
154 struct glx_display *const priv = __glXInitialize(dpy);
155
156 return (priv
157 && priv->screens !=
158 NULL) ? priv->screens[scrn] : NULL;
159 }
160
161
162 static int
163 GetGLXPrivScreenConfig(Display * dpy, int scrn, struct glx_display ** ppriv,
164 struct glx_screen ** ppsc)
165 {
166 /* Initialize the extension, if needed . This has the added value
167 * of initializing/allocating the display private
168 */
169
170 if (dpy == NULL) {
171 return GLX_NO_EXTENSION;
172 }
173
174 *ppriv = __glXInitialize(dpy);
175 if (*ppriv == NULL) {
176 return GLX_NO_EXTENSION;
177 }
178
179 /* Check screen number to see if its valid */
180 if ((scrn < 0) || (scrn >= ScreenCount(dpy))) {
181 return GLX_BAD_SCREEN;
182 }
183
184 /* Check to see if the GL is supported on this screen */
185 *ppsc = (*ppriv)->screens[scrn];
186 if ((*ppsc)->configs == NULL && (*ppsc)->visuals == NULL) {
187 /* No support for GL on this screen regardless of visual */
188 return GLX_BAD_VISUAL;
189 }
190
191 return Success;
192 }
193
194
195 /**
196 * Determine if a \c GLXFBConfig supplied by the application is valid.
197 *
198 * \param dpy Application supplied \c Display pointer.
199 * \param config Application supplied \c GLXFBConfig.
200 *
201 * \returns If the \c GLXFBConfig is valid, the a pointer to the matching
202 * \c struct glx_config structure is returned. Otherwise, \c NULL
203 * is returned.
204 */
205 static struct glx_config *
206 ValidateGLXFBConfig(Display * dpy, GLXFBConfig fbconfig)
207 {
208 struct glx_display *const priv = __glXInitialize(dpy);
209 int num_screens = ScreenCount(dpy);
210 unsigned i;
211 struct glx_config *config;
212
213 if (priv != NULL) {
214 for (i = 0; i < num_screens; i++) {
215 for (config = priv->screens[i]->configs; config != NULL;
216 config = config->next) {
217 if (config == (struct glx_config *) fbconfig) {
218 return config;
219 }
220 }
221 }
222 }
223
224 return NULL;
225 }
226
227 /**
228 * Verifies context's GLX_RENDER_TYPE value with config.
229 *
230 * \param config GLX FBConfig which will support the returned renderType.
231 * \param renderType The context render type to be verified.
232 * \return True if the value of context renderType was approved, or 0 if no
233 * valid value was found.
234 */
235 Bool
236 validate_renderType_against_config(const struct glx_config *config,
237 int renderType)
238 {
239 /* GLX_EXT_no_config_context supports any render type */
240 if (!config)
241 return True;
242
243 switch (renderType) {
244 case GLX_RGBA_TYPE:
245 return (config->renderType & GLX_RGBA_BIT) != 0;
246 case GLX_COLOR_INDEX_TYPE:
247 return (config->renderType & GLX_COLOR_INDEX_BIT) != 0;
248 case GLX_RGBA_FLOAT_TYPE_ARB:
249 return (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) != 0;
250 case GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT:
251 return (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) != 0;
252 default:
253 break;
254 }
255 return 0;
256 }
257
258 _X_HIDDEN Bool
259 glx_context_init(struct glx_context *gc,
260 struct glx_screen *psc, struct glx_config *config)
261 {
262 gc->majorOpcode = __glXSetupForCommand(psc->display->dpy);
263 if (!gc->majorOpcode)
264 return False;
265
266 gc->screen = psc->scr;
267 gc->psc = psc;
268 gc->config = config;
269 gc->isDirect = GL_TRUE;
270 gc->currentContextTag = -1;
271
272 return True;
273 }
274
275 /**
276 * Determine if a context uses direct rendering.
277 *
278 * \param dpy Display where the context was created.
279 * \param contextID ID of the context to be tested.
280 * \param error Out parameter, set to True on error if not NULL
281 *
282 * \returns \c True if the context is direct rendering or not.
283 */
284 static Bool
285 __glXIsDirect(Display * dpy, GLXContextID contextID, Bool *error)
286 {
287 CARD8 opcode;
288 xcb_connection_t *c;
289 xcb_generic_error_t *err;
290 xcb_glx_is_direct_reply_t *reply;
291 Bool is_direct;
292
293 opcode = __glXSetupForCommand(dpy);
294 if (!opcode) {
295 return False;
296 }
297
298 c = XGetXCBConnection(dpy);
299 reply = xcb_glx_is_direct_reply(c, xcb_glx_is_direct(c, contextID), &err);
300 is_direct = (reply != NULL && reply->is_direct) ? True : False;
301
302 if (err != NULL) {
303 if (error)
304 *error = True;
305 __glXSendErrorForXcb(dpy, err);
306 free(err);
307 }
308
309 free(reply);
310
311 return is_direct;
312 }
313
314 /**
315 * Create a new context.
316 *
317 * \param renderType For FBConfigs, what is the rendering type?
318 */
319
320 static GLXContext
321 CreateContext(Display *dpy, int generic_id, struct glx_config *config,
322 GLXContext shareList_user, Bool allowDirect,
323 unsigned code, int renderType, int screen)
324 {
325 struct glx_context *gc;
326 struct glx_screen *psc;
327 struct glx_context *shareList = (struct glx_context *) shareList_user;
328 if (dpy == NULL)
329 return NULL;
330
331 psc = GetGLXScreenConfigs(dpy, screen);
332 if (psc == NULL)
333 return NULL;
334
335 if (generic_id == None)
336 return NULL;
337
338 gc = NULL;
339 #ifdef GLX_USE_APPLEGL
340 gc = applegl_create_context(psc, config, shareList, renderType);
341 #else
342 if (allowDirect && psc->vtable->create_context)
343 gc = psc->vtable->create_context(psc, config, shareList, renderType);
344 if (!gc)
345 gc = indirect_create_context(psc, config, shareList, renderType);
346 #endif
347 if (!gc)
348 return NULL;
349
350 LockDisplay(dpy);
351 switch (code) {
352 case X_GLXCreateContext: {
353 xGLXCreateContextReq *req;
354
355 /* Send the glXCreateContext request */
356 GetReq(GLXCreateContext, req);
357 req->reqType = gc->majorOpcode;
358 req->glxCode = X_GLXCreateContext;
359 req->context = gc->xid = XAllocID(dpy);
360 req->visual = generic_id;
361 req->screen = screen;
362 req->shareList = shareList ? shareList->xid : None;
363 req->isDirect = gc->isDirect;
364 break;
365 }
366
367 case X_GLXCreateNewContext: {
368 xGLXCreateNewContextReq *req;
369
370 /* Send the glXCreateNewContext request */
371 GetReq(GLXCreateNewContext, req);
372 req->reqType = gc->majorOpcode;
373 req->glxCode = X_GLXCreateNewContext;
374 req->context = gc->xid = XAllocID(dpy);
375 req->fbconfig = generic_id;
376 req->screen = screen;
377 req->renderType = renderType;
378 req->shareList = shareList ? shareList->xid : None;
379 req->isDirect = gc->isDirect;
380 break;
381 }
382
383 case X_GLXvop_CreateContextWithConfigSGIX: {
384 xGLXVendorPrivateWithReplyReq *vpreq;
385 xGLXCreateContextWithConfigSGIXReq *req;
386
387 /* Send the glXCreateNewContext request */
388 GetReqExtra(GLXVendorPrivateWithReply,
389 sz_xGLXCreateContextWithConfigSGIXReq -
390 sz_xGLXVendorPrivateWithReplyReq, vpreq);
391 req = (xGLXCreateContextWithConfigSGIXReq *) vpreq;
392 req->reqType = gc->majorOpcode;
393 req->glxCode = X_GLXVendorPrivateWithReply;
394 req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX;
395 req->context = gc->xid = XAllocID(dpy);
396 req->fbconfig = generic_id;
397 req->screen = screen;
398 req->renderType = renderType;
399 req->shareList = shareList ? shareList->xid : None;
400 req->isDirect = gc->isDirect;
401 break;
402 }
403
404 default:
405 /* What to do here? This case is the sign of an internal error. It
406 * should never be reachable.
407 */
408 break;
409 }
410
411 UnlockDisplay(dpy);
412 SyncHandle();
413
414 gc->share_xid = shareList ? shareList->xid : None;
415 gc->imported = GL_FALSE;
416
417 /* Unlike most X resource creation requests, we're about to return a handle
418 * with client-side state, not just an XID. To simplify error handling
419 * elsewhere in libGL, force a round-trip here to ensure the CreateContext
420 * request above succeeded.
421 */
422 {
423 Bool error = False;
424 int isDirect = __glXIsDirect(dpy, gc->xid, &error);
425
426 if (error != False || isDirect != gc->isDirect) {
427 gc->vtable->destroy(gc);
428 gc = NULL;
429 }
430 }
431
432 return (GLXContext) gc;
433 }
434
435 _GLX_PUBLIC GLXContext
436 glXCreateContext(Display * dpy, XVisualInfo * vis,
437 GLXContext shareList, Bool allowDirect)
438 {
439 struct glx_config *config = NULL;
440 int renderType = GLX_RGBA_TYPE;
441
442 #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL)
443 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen);
444
445 if (psc)
446 config = glx_config_find_visual(psc->visuals, vis->visualid);
447
448 if (config == NULL) {
449 __glXSendError(dpy, BadValue, vis->visualid, X_GLXCreateContext, True);
450 return None;
451 }
452
453 /* Choose the context render type based on DRI config values. It is
454 * unusual to set this type from config, but we have no other choice, as
455 * this old API does not provide renderType parameter.
456 */
457 if (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) {
458 renderType = GLX_RGBA_FLOAT_TYPE_ARB;
459 } else if (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) {
460 renderType = GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT;
461 } else if (config->renderType & GLX_RGBA_BIT) {
462 renderType = GLX_RGBA_TYPE;
463 } else if (config->renderType & GLX_COLOR_INDEX_BIT) {
464 renderType = GLX_COLOR_INDEX_TYPE;
465 }
466 #endif
467
468 return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
469 X_GLXCreateContext, renderType, vis->screen);
470 }
471
472 static void
473 glx_send_destroy_context(Display *dpy, XID xid)
474 {
475 CARD8 opcode = __glXSetupForCommand(dpy);
476 xGLXDestroyContextReq *req;
477
478 LockDisplay(dpy);
479 GetReq(GLXDestroyContext, req);
480 req->reqType = opcode;
481 req->glxCode = X_GLXDestroyContext;
482 req->context = xid;
483 UnlockDisplay(dpy);
484 SyncHandle();
485 }
486
487 /*
488 ** Destroy the named context
489 */
490
491 _GLX_PUBLIC void
492 glXDestroyContext(Display * dpy, GLXContext ctx)
493 {
494 struct glx_context *gc = (struct glx_context *) ctx;
495
496 if (gc == NULL || gc->xid == None)
497 return;
498
499 __glXLock();
500 if (!gc->imported)
501 glx_send_destroy_context(dpy, gc->xid);
502
503 if (gc->currentDpy) {
504 /* This context is bound to some thread. According to the man page,
505 * we should not actually delete the context until it's unbound.
506 * Note that we set gc->xid = None above. In MakeContextCurrent()
507 * we check for that and delete the context there.
508 */
509 gc->xid = None;
510 } else {
511 gc->vtable->destroy(gc);
512 }
513 __glXUnlock();
514 }
515
516 /*
517 ** Return the major and minor version #s for the GLX extension
518 */
519 _GLX_PUBLIC Bool
520 glXQueryVersion(Display * dpy, int *major, int *minor)
521 {
522 struct glx_display *priv;
523
524 /* Init the extension. This fetches the major and minor version. */
525 priv = __glXInitialize(dpy);
526 if (!priv)
527 return False;
528
529 if (major)
530 *major = priv->majorVersion;
531 if (minor)
532 *minor = priv->minorVersion;
533 return True;
534 }
535
536 /*
537 ** Query the existence of the GLX extension
538 */
539 _GLX_PUBLIC Bool
540 glXQueryExtension(Display * dpy, int *errorBase, int *eventBase)
541 {
542 int major_op, erb, evb;
543 Bool rv;
544
545 rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
546 if (rv) {
547 if (errorBase)
548 *errorBase = erb;
549 if (eventBase)
550 *eventBase = evb;
551 }
552 return rv;
553 }
554
555 /*
556 ** Put a barrier in the token stream that forces the GL to finish its
557 ** work before X can proceed.
558 */
559 _GLX_PUBLIC void
560 glXWaitGL(void)
561 {
562 struct glx_context *gc = __glXGetCurrentContext();
563
564 if (gc->vtable->wait_gl)
565 gc->vtable->wait_gl(gc);
566 }
567
568 /*
569 ** Put a barrier in the token stream that forces X to finish its
570 ** work before GL can proceed.
571 */
572 _GLX_PUBLIC void
573 glXWaitX(void)
574 {
575 struct glx_context *gc = __glXGetCurrentContext();
576
577 if (gc->vtable->wait_x)
578 gc->vtable->wait_x(gc);
579 }
580
581 _GLX_PUBLIC void
582 glXUseXFont(Font font, int first, int count, int listBase)
583 {
584 struct glx_context *gc = __glXGetCurrentContext();
585
586 if (gc->vtable->use_x_font)
587 gc->vtable->use_x_font(gc, font, first, count, listBase);
588 }
589
590 /************************************************************************/
591
592 /*
593 ** Copy the source context to the destination context using the
594 ** attribute "mask".
595 */
596 _GLX_PUBLIC void
597 glXCopyContext(Display * dpy, GLXContext source_user,
598 GLXContext dest_user, unsigned long mask)
599 {
600 struct glx_context *source = (struct glx_context *) source_user;
601 struct glx_context *dest = (struct glx_context *) dest_user;
602 #ifdef GLX_USE_APPLEGL
603 struct glx_context *gc = __glXGetCurrentContext();
604 int errorcode;
605 bool x11error;
606
607 if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext,
608 mask, &errorcode, &x11error)) {
609 __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error);
610 }
611
612 #else
613 xGLXCopyContextReq *req;
614 struct glx_context *gc = __glXGetCurrentContext();
615 GLXContextTag tag;
616 CARD8 opcode;
617
618 opcode = __glXSetupForCommand(dpy);
619 if (!opcode) {
620 return;
621 }
622
623 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
624 if (gc->isDirect) {
625 /* NOT_DONE: This does not work yet */
626 }
627 #endif
628
629 /*
630 ** If the source is the current context, send its tag so that the context
631 ** can be flushed before the copy.
632 */
633 if (source == gc && dpy == gc->currentDpy) {
634 tag = gc->currentContextTag;
635 }
636 else {
637 tag = 0;
638 }
639
640 /* Send the glXCopyContext request */
641 LockDisplay(dpy);
642 GetReq(GLXCopyContext, req);
643 req->reqType = opcode;
644 req->glxCode = X_GLXCopyContext;
645 req->source = source ? source->xid : None;
646 req->dest = dest ? dest->xid : None;
647 req->mask = mask;
648 req->contextTag = tag;
649 UnlockDisplay(dpy);
650 SyncHandle();
651 #endif /* GLX_USE_APPLEGL */
652 }
653
654
655 /**
656 * \todo
657 * Shouldn't this function \b always return \c False when
658 * \c GLX_DIRECT_RENDERING is not defined? Do we really need to bother with
659 * the GLX protocol here at all?
660 */
661 _GLX_PUBLIC Bool
662 glXIsDirect(Display * dpy, GLXContext gc_user)
663 {
664 struct glx_context *gc = (struct glx_context *) gc_user;
665
666 if (!gc) {
667 return False;
668 }
669 else if (gc->isDirect) {
670 return True;
671 }
672 #ifdef GLX_USE_APPLEGL /* TODO: indirect on darwin */
673 return False;
674 #else
675 return __glXIsDirect(dpy, gc->xid, NULL);
676 #endif
677 }
678
679 _GLX_PUBLIC GLXPixmap
680 glXCreateGLXPixmap(Display * dpy, XVisualInfo * vis, Pixmap pixmap)
681 {
682 #ifdef GLX_USE_APPLEGL
683 int screen = vis->screen;
684 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen);
685 const struct glx_config *config;
686
687 config = glx_config_find_visual(psc->visuals, vis->visualid);
688
689 if(apple_glx_pixmap_create(dpy, vis->screen, pixmap, config))
690 return None;
691
692 return pixmap;
693 #else
694 xGLXCreateGLXPixmapReq *req;
695 struct glx_drawable *glxDraw;
696 GLXPixmap xid;
697 CARD8 opcode;
698
699 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
700 struct glx_display *const priv = __glXInitialize(dpy);
701
702 if (priv == NULL)
703 return None;
704 #endif
705
706 opcode = __glXSetupForCommand(dpy);
707 if (!opcode) {
708 return None;
709 }
710
711 glxDraw = malloc(sizeof(*glxDraw));
712 if (!glxDraw)
713 return None;
714
715 /* Send the glXCreateGLXPixmap request */
716 LockDisplay(dpy);
717 GetReq(GLXCreateGLXPixmap, req);
718 req->reqType = opcode;
719 req->glxCode = X_GLXCreateGLXPixmap;
720 req->screen = vis->screen;
721 req->visual = vis->visualid;
722 req->pixmap = pixmap;
723 req->glxpixmap = xid = XAllocID(dpy);
724 UnlockDisplay(dpy);
725 SyncHandle();
726
727 if (InitGLXDrawable(dpy, glxDraw, pixmap, req->glxpixmap)) {
728 free(glxDraw);
729 return None;
730 }
731
732 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
733 do {
734 /* FIXME: Maybe delay __DRIdrawable creation until the drawable
735 * is actually bound to a context... */
736
737 __GLXDRIdrawable *pdraw;
738 struct glx_screen *psc;
739 struct glx_config *config;
740
741 psc = priv->screens[vis->screen];
742 if (psc->driScreen == NULL)
743 return xid;
744
745 config = glx_config_find_visual(psc->visuals, vis->visualid);
746 pdraw = psc->driScreen->createDrawable(psc, pixmap, xid, config);
747 if (pdraw == NULL) {
748 fprintf(stderr, "failed to create pixmap\n");
749 xid = None;
750 break;
751 }
752
753 if (__glxHashInsert(priv->drawHash, xid, pdraw)) {
754 (*pdraw->destroyDrawable) (pdraw);
755 xid = None;
756 break;
757 }
758 } while (0);
759
760 if (xid == None) {
761 xGLXDestroyGLXPixmapReq *dreq;
762 LockDisplay(dpy);
763 GetReq(GLXDestroyGLXPixmap, dreq);
764 dreq->reqType = opcode;
765 dreq->glxCode = X_GLXDestroyGLXPixmap;
766 dreq->glxpixmap = xid;
767 UnlockDisplay(dpy);
768 SyncHandle();
769 }
770 #endif
771
772 return xid;
773 #endif
774 }
775
776 /*
777 ** Destroy the named pixmap
778 */
779 _GLX_PUBLIC void
780 glXDestroyGLXPixmap(Display * dpy, GLXPixmap glxpixmap)
781 {
782 #ifdef GLX_USE_APPLEGL
783 if(apple_glx_pixmap_destroy(dpy, glxpixmap))
784 __glXSendError(dpy, GLXBadPixmap, glxpixmap, X_GLXDestroyPixmap, false);
785 #else
786 xGLXDestroyGLXPixmapReq *req;
787 CARD8 opcode;
788
789 opcode = __glXSetupForCommand(dpy);
790 if (!opcode) {
791 return;
792 }
793
794 /* Send the glXDestroyGLXPixmap request */
795 LockDisplay(dpy);
796 GetReq(GLXDestroyGLXPixmap, req);
797 req->reqType = opcode;
798 req->glxCode = X_GLXDestroyGLXPixmap;
799 req->glxpixmap = glxpixmap;
800 UnlockDisplay(dpy);
801 SyncHandle();
802
803 DestroyGLXDrawable(dpy, glxpixmap);
804
805 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
806 {
807 struct glx_display *const priv = __glXInitialize(dpy);
808 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, glxpixmap);
809
810 if (priv != NULL && pdraw != NULL) {
811 (*pdraw->destroyDrawable) (pdraw);
812 __glxHashDelete(priv->drawHash, glxpixmap);
813 }
814 }
815 #endif
816 #endif /* GLX_USE_APPLEGL */
817 }
818
819 _GLX_PUBLIC void
820 glXSwapBuffers(Display * dpy, GLXDrawable drawable)
821 {
822 #ifdef GLX_USE_APPLEGL
823 struct glx_context * gc = __glXGetCurrentContext();
824 if(gc != &dummyContext && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
825 apple_glx_swap_buffers(gc->driContext);
826 } else {
827 __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false);
828 }
829 #else
830 struct glx_context *gc;
831 GLXContextTag tag;
832 CARD8 opcode;
833 xcb_connection_t *c;
834
835 gc = __glXGetCurrentContext();
836
837 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
838 {
839 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
840
841 if (pdraw != NULL) {
842 Bool flush = gc != &dummyContext && drawable == gc->currentDrawable;
843
844 pdraw->psc->driScreen->swapBuffers(pdraw, 0, 0, 0, flush);
845 return;
846 }
847 }
848 #endif
849
850 opcode = __glXSetupForCommand(dpy);
851 if (!opcode) {
852 return;
853 }
854
855 /*
856 ** The calling thread may or may not have a current context. If it
857 ** does, send the context tag so the server can do a flush.
858 */
859 if ((gc != &dummyContext) && (dpy == gc->currentDpy) &&
860 ((drawable == gc->currentDrawable)
861 || (drawable == gc->currentReadable))) {
862 tag = gc->currentContextTag;
863 }
864 else {
865 tag = 0;
866 }
867
868 c = XGetXCBConnection(dpy);
869 xcb_glx_swap_buffers(c, tag, drawable);
870 xcb_flush(c);
871 #endif /* GLX_USE_APPLEGL */
872 }
873
874
875 /*
876 ** Return configuration information for the given display, screen and
877 ** visual combination.
878 */
879 _GLX_PUBLIC int
880 glXGetConfig(Display * dpy, XVisualInfo * vis, int attribute,
881 int *value_return)
882 {
883 struct glx_display *priv;
884 struct glx_screen *psc;
885 struct glx_config *config;
886 int status;
887
888 status = GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc);
889 if (status == Success) {
890 config = glx_config_find_visual(psc->visuals, vis->visualid);
891
892 /* Lookup attribute after first finding a match on the visual */
893 if (config != NULL) {
894 return glx_config_get(config, attribute, value_return);
895 }
896
897 status = GLX_BAD_VISUAL;
898 }
899
900 /*
901 ** If we can't find the config for this visual, this visual is not
902 ** supported by the OpenGL implementation on the server.
903 */
904 if ((status == GLX_BAD_VISUAL) && (attribute == GLX_USE_GL)) {
905 *value_return = False;
906 status = Success;
907 }
908
909 return status;
910 }
911
912 /************************************************************************/
913
914 static void
915 init_fbconfig_for_chooser(struct glx_config * config,
916 GLboolean fbconfig_style_tags)
917 {
918 memset(config, 0, sizeof(struct glx_config));
919 config->visualID = (XID) GLX_DONT_CARE;
920 config->visualType = GLX_DONT_CARE;
921
922 /* glXChooseFBConfig specifies different defaults for these properties than
923 * glXChooseVisual.
924 */
925 if (fbconfig_style_tags) {
926 config->doubleBufferMode = GLX_DONT_CARE;
927 config->renderType = GLX_RGBA_BIT;
928 }
929
930 config->drawableType = GLX_WINDOW_BIT;
931 config->visualRating = GLX_DONT_CARE;
932 config->transparentPixel = GLX_NONE;
933 config->transparentRed = GLX_DONT_CARE;
934 config->transparentGreen = GLX_DONT_CARE;
935 config->transparentBlue = GLX_DONT_CARE;
936 config->transparentAlpha = GLX_DONT_CARE;
937 config->transparentIndex = GLX_DONT_CARE;
938
939 config->xRenderable = GLX_DONT_CARE;
940 config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
941
942 config->swapMethod = GLX_DONT_CARE;
943 config->sRGBCapable = GLX_DONT_CARE;
944 }
945
946 #define MATCH_DONT_CARE( param ) \
947 do { \
948 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
949 && (a-> param != b-> param) ) { \
950 return False; \
951 } \
952 } while ( 0 )
953
954 #define MATCH_MINIMUM( param ) \
955 do { \
956 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
957 && (a-> param > b-> param) ) { \
958 return False; \
959 } \
960 } while ( 0 )
961
962 #define MATCH_EXACT( param ) \
963 do { \
964 if ( a-> param != b-> param) { \
965 return False; \
966 } \
967 } while ( 0 )
968
969 /* Test that all bits from a are contained in b */
970 #define MATCH_MASK(param) \
971 do { \
972 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
973 && ((a->param & ~b->param) != 0) ) { \
974 return False; \
975 } \
976 } while (0);
977
978 /**
979 * Determine if two GLXFBConfigs are compatible.
980 *
981 * \param a Application specified config to test.
982 * \param b Server specified config to test against \c a.
983 */
984 static Bool
985 fbconfigs_compatible(const struct glx_config * const a,
986 const struct glx_config * const b)
987 {
988 MATCH_DONT_CARE(doubleBufferMode);
989 MATCH_DONT_CARE(visualType);
990 MATCH_DONT_CARE(visualRating);
991 MATCH_DONT_CARE(xRenderable);
992 MATCH_DONT_CARE(fbconfigID);
993 MATCH_DONT_CARE(swapMethod);
994
995 MATCH_MINIMUM(rgbBits);
996 MATCH_MINIMUM(numAuxBuffers);
997 MATCH_MINIMUM(redBits);
998 MATCH_MINIMUM(greenBits);
999 MATCH_MINIMUM(blueBits);
1000 MATCH_MINIMUM(alphaBits);
1001 MATCH_MINIMUM(depthBits);
1002 MATCH_MINIMUM(stencilBits);
1003 MATCH_MINIMUM(accumRedBits);
1004 MATCH_MINIMUM(accumGreenBits);
1005 MATCH_MINIMUM(accumBlueBits);
1006 MATCH_MINIMUM(accumAlphaBits);
1007 MATCH_MINIMUM(sampleBuffers);
1008 MATCH_MINIMUM(maxPbufferWidth);
1009 MATCH_MINIMUM(maxPbufferHeight);
1010 MATCH_MINIMUM(maxPbufferPixels);
1011 MATCH_MINIMUM(samples);
1012
1013 MATCH_DONT_CARE(stereoMode);
1014 MATCH_EXACT(level);
1015
1016 MATCH_MASK(drawableType);
1017 MATCH_MASK(renderType);
1018 MATCH_DONT_CARE(sRGBCapable);
1019
1020 /* There is a bug in a few of the XFree86 DDX drivers. They contain
1021 * visuals with a "transparent type" of 0 when they really mean GLX_NONE.
1022 * Technically speaking, it is a bug in the DDX driver, but there is
1023 * enough of an installed base to work around the problem here. In any
1024 * case, 0 is not a valid value of the transparent type, so we'll treat 0
1025 * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and
1026 * 0 from the server to be a match to maintain backward compatibility with
1027 * the (broken) drivers.
1028 */
1029
1030 if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) {
1031 if (a->transparentPixel == GLX_NONE) {
1032 if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0)
1033 return False;
1034 }
1035 else {
1036 MATCH_EXACT(transparentPixel);
1037 }
1038
1039 switch (a->transparentPixel) {
1040 case GLX_TRANSPARENT_RGB:
1041 MATCH_DONT_CARE(transparentRed);
1042 MATCH_DONT_CARE(transparentGreen);
1043 MATCH_DONT_CARE(transparentBlue);
1044 MATCH_DONT_CARE(transparentAlpha);
1045 break;
1046
1047 case GLX_TRANSPARENT_INDEX:
1048 MATCH_DONT_CARE(transparentIndex);
1049 break;
1050
1051 default:
1052 break;
1053 }
1054 }
1055
1056 return True;
1057 }
1058
1059
1060 /* There's some trickly language in the GLX spec about how this is supposed
1061 * to work. Basically, if a given component size is either not specified
1062 * or the requested size is zero, it is supposed to act like PERFER_SMALLER.
1063 * Well, that's really hard to do with the code as-is. This behavior is
1064 * closer to correct, but still not technically right.
1065 */
1066 #define PREFER_LARGER_OR_ZERO(comp) \
1067 do { \
1068 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1069 if ( ((*a)-> comp) == 0 ) { \
1070 return -1; \
1071 } \
1072 else if ( ((*b)-> comp) == 0 ) { \
1073 return 1; \
1074 } \
1075 else { \
1076 return ((*b)-> comp) - ((*a)-> comp) ; \
1077 } \
1078 } \
1079 } while( 0 )
1080
1081 #define PREFER_LARGER(comp) \
1082 do { \
1083 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1084 return ((*b)-> comp) - ((*a)-> comp) ; \
1085 } \
1086 } while( 0 )
1087
1088 #define PREFER_SMALLER(comp) \
1089 do { \
1090 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1091 return ((*a)-> comp) - ((*b)-> comp) ; \
1092 } \
1093 } while( 0 )
1094
1095 /**
1096 * Compare two GLXFBConfigs. This function is intended to be used as the
1097 * compare function passed in to qsort.
1098 *
1099 * \returns If \c a is a "better" config, according to the specification of
1100 * SGIX_fbconfig, a number less than zero is returned. If \c b is
1101 * better, then a number greater than zero is return. If both are
1102 * equal, zero is returned.
1103 * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1104 */
1105 static int
1106 fbconfig_compare(struct glx_config **a, struct glx_config **b)
1107 {
1108 /* The order of these comparisons must NOT change. It is defined by
1109 * the GLX 1.4 specification.
1110 */
1111
1112 PREFER_SMALLER(visualSelectGroup);
1113
1114 /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and
1115 * GLX_NON_CONFORMANT_CONFIG. It just so happens that this is the
1116 * numerical sort order of the enums (0x8000, 0x8001, and 0x800D).
1117 */
1118 PREFER_SMALLER(visualRating);
1119
1120 /* This isn't quite right. It is supposed to compare the sum of the
1121 * components the user specifically set minimums for.
1122 */
1123 PREFER_LARGER_OR_ZERO(redBits);
1124 PREFER_LARGER_OR_ZERO(greenBits);
1125 PREFER_LARGER_OR_ZERO(blueBits);
1126 PREFER_LARGER_OR_ZERO(alphaBits);
1127
1128 PREFER_SMALLER(rgbBits);
1129
1130 if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) {
1131 /* Prefer single-buffer.
1132 */
1133 return (!(*a)->doubleBufferMode) ? -1 : 1;
1134 }
1135
1136 PREFER_SMALLER(numAuxBuffers);
1137
1138 PREFER_SMALLER(sampleBuffers);
1139 PREFER_SMALLER(samples);
1140
1141 PREFER_LARGER_OR_ZERO(depthBits);
1142 PREFER_SMALLER(stencilBits);
1143
1144 /* This isn't quite right. It is supposed to compare the sum of the
1145 * components the user specifically set minimums for.
1146 */
1147 PREFER_LARGER_OR_ZERO(accumRedBits);
1148 PREFER_LARGER_OR_ZERO(accumGreenBits);
1149 PREFER_LARGER_OR_ZERO(accumBlueBits);
1150 PREFER_LARGER_OR_ZERO(accumAlphaBits);
1151
1152 PREFER_SMALLER(visualType);
1153
1154 /* None of the pbuffer or fbconfig specs say that this comparison needs
1155 * to happen at all, but it seems like it should.
1156 */
1157 PREFER_LARGER(maxPbufferWidth);
1158 PREFER_LARGER(maxPbufferHeight);
1159 PREFER_LARGER(maxPbufferPixels);
1160
1161 return 0;
1162 }
1163
1164
1165 /**
1166 * Selects and sorts a subset of the supplied configs based on the attributes.
1167 * This function forms to basis of \c glXChooseFBConfig and
1168 * \c glXChooseFBConfigSGIX.
1169 *
1170 * \param configs Array of pointers to possible configs. The elements of
1171 * this array that do not meet the criteria will be set to
1172 * NULL. The remaining elements will be sorted according to
1173 * the various visual / FBConfig selection rules.
1174 * \param num_configs Number of elements in the \c configs array.
1175 * \param attribList Attributes used select from \c configs. This array is
1176 * terminated by a \c None tag. The array is of the form
1177 * expected by \c glXChooseFBConfig (where every tag has a
1178 * value).
1179 * \returns The number of valid elements left in \c configs.
1180 *
1181 * \sa glXChooseFBConfig, glXChooseFBConfigSGIX
1182 */
1183 static int
1184 choose_fbconfig(struct glx_config ** configs, int num_configs,
1185 const int *attribList)
1186 {
1187 struct glx_config test_config;
1188 int base;
1189 int i;
1190
1191 /* This is a fairly direct implementation of the selection method
1192 * described by GLX_SGIX_fbconfig. Start by culling out all the
1193 * configs that are not compatible with the selected parameter
1194 * list.
1195 */
1196
1197 init_fbconfig_for_chooser(&test_config, GL_TRUE);
1198 __glXInitializeVisualConfigFromTags(&test_config, 512,
1199 (const INT32 *) attribList,
1200 GL_TRUE, GL_TRUE);
1201
1202 base = 0;
1203 for (i = 0; i < num_configs; i++) {
1204 if (fbconfigs_compatible(&test_config, configs[i])) {
1205 configs[base] = configs[i];
1206 base++;
1207 }
1208 }
1209
1210 if (base == 0) {
1211 return 0;
1212 }
1213
1214 if (base < num_configs) {
1215 (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base));
1216 }
1217
1218 /* After the incompatible configs are removed, the resulting
1219 * list is sorted according to the rules set out in the various
1220 * specifications.
1221 */
1222
1223 qsort(configs, base, sizeof(struct glx_config *),
1224 (int (*)(const void *, const void *)) fbconfig_compare);
1225 return base;
1226 }
1227
1228
1229
1230
1231 /*
1232 ** Return the visual that best matches the template. Return None if no
1233 ** visual matches the template.
1234 */
1235 _GLX_PUBLIC XVisualInfo *
1236 glXChooseVisual(Display * dpy, int screen, int *attribList)
1237 {
1238 XVisualInfo *visualList = NULL;
1239 struct glx_display *priv;
1240 struct glx_screen *psc;
1241 struct glx_config test_config;
1242 struct glx_config *config;
1243 struct glx_config *best_config = NULL;
1244
1245 /*
1246 ** Get a list of all visuals, return if list is empty
1247 */
1248 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1249 return None;
1250 }
1251
1252
1253 /*
1254 ** Build a template from the defaults and the attribute list
1255 ** Free visual list and return if an unexpected token is encountered
1256 */
1257 init_fbconfig_for_chooser(&test_config, GL_FALSE);
1258 __glXInitializeVisualConfigFromTags(&test_config, 512,
1259 (const INT32 *) attribList,
1260 GL_TRUE, GL_FALSE);
1261
1262 /*
1263 ** Eliminate visuals that don't meet minimum requirements
1264 ** Compute a score for those that do
1265 ** Remember which visual, if any, got the highest score
1266 ** If no visual is acceptable, return None
1267 ** Otherwise, create an XVisualInfo list with just the selected X visual
1268 ** and return this.
1269 */
1270 for (config = psc->visuals; config != NULL; config = config->next) {
1271 if (fbconfigs_compatible(&test_config, config)
1272 && ((best_config == NULL) ||
1273 (fbconfig_compare (&config, &best_config) < 0))) {
1274 XVisualInfo visualTemplate;
1275 XVisualInfo *newList;
1276 int i;
1277
1278 visualTemplate.screen = screen;
1279 visualTemplate.visualid = config->visualID;
1280 newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask,
1281 &visualTemplate, &i);
1282
1283 if (newList) {
1284 free(visualList);
1285 visualList = newList;
1286 best_config = config;
1287 }
1288 }
1289 }
1290
1291 #ifdef GLX_USE_APPLEGL
1292 if(visualList && env_var_as_boolean("LIBGL_DUMP_VISUALID", false)) {
1293 printf("visualid 0x%lx\n", visualList[0].visualid);
1294 }
1295 #endif
1296
1297 return visualList;
1298 }
1299
1300
1301 _GLX_PUBLIC const char *
1302 glXQueryExtensionsString(Display * dpy, int screen)
1303 {
1304 struct glx_screen *psc;
1305 struct glx_display *priv;
1306
1307 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1308 return NULL;
1309 }
1310
1311 if (!psc->effectiveGLXexts) {
1312 if (!psc->serverGLXexts) {
1313 psc->serverGLXexts =
1314 __glXQueryServerString(dpy, priv->majorOpcode, screen,
1315 GLX_EXTENSIONS);
1316 }
1317
1318 __glXCalculateUsableExtensions(psc,
1319 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
1320 (psc->driScreen != NULL),
1321 #else
1322 GL_FALSE,
1323 #endif
1324 priv->minorVersion);
1325 }
1326
1327 return psc->effectiveGLXexts;
1328 }
1329
1330 _GLX_PUBLIC const char *
1331 glXGetClientString(Display * dpy, int name)
1332 {
1333 (void) dpy;
1334
1335 switch (name) {
1336 case GLX_VENDOR:
1337 return (__glXGLXClientVendorName);
1338 case GLX_VERSION:
1339 return (__glXGLXClientVersion);
1340 case GLX_EXTENSIONS:
1341 return (__glXGetClientExtensions());
1342 default:
1343 return NULL;
1344 }
1345 }
1346
1347 _GLX_PUBLIC const char *
1348 glXQueryServerString(Display * dpy, int screen, int name)
1349 {
1350 struct glx_screen *psc;
1351 struct glx_display *priv;
1352 const char **str;
1353
1354
1355 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1356 return NULL;
1357 }
1358
1359 switch (name) {
1360 case GLX_VENDOR:
1361 str = &priv->serverGLXvendor;
1362 break;
1363 case GLX_VERSION:
1364 str = &priv->serverGLXversion;
1365 break;
1366 case GLX_EXTENSIONS:
1367 str = &psc->serverGLXexts;
1368 break;
1369 default:
1370 return NULL;
1371 }
1372
1373 if (*str == NULL) {
1374 *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
1375 }
1376
1377 return *str;
1378 }
1379
1380
1381 /*
1382 ** EXT_import_context
1383 */
1384
1385 _GLX_PUBLIC Display *
1386 glXGetCurrentDisplay(void)
1387 {
1388 struct glx_context *gc = __glXGetCurrentContext();
1389 if (gc == &dummyContext)
1390 return NULL;
1391 return gc->currentDpy;
1392 }
1393
1394 _GLX_PUBLIC
1395 GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (),
1396 glXGetCurrentDisplay)
1397
1398 #ifndef GLX_USE_APPLEGL
1399 _GLX_PUBLIC GLXContext
1400 glXImportContextEXT(Display *dpy, GLXContextID contextID)
1401 {
1402 struct glx_display *priv = __glXInitialize(dpy);
1403 struct glx_screen *psc = NULL;
1404 xGLXQueryContextReply reply;
1405 CARD8 opcode;
1406 struct glx_context *ctx;
1407 int i, renderType = GLX_RGBA_TYPE; /* By default, assume RGBA context */
1408 XID share = None;
1409 struct glx_config *mode = NULL;
1410 uint32_t fbconfigID = 0;
1411 uint32_t visualID = 0;
1412 uint32_t screen = 0;
1413 Bool got_screen = False;
1414
1415 if (priv == NULL)
1416 return NULL;
1417
1418 /* The GLX_EXT_import_context spec says:
1419 *
1420 * "If <contextID> does not refer to a valid context, then a BadContext
1421 * error is generated; if <contextID> refers to direct rendering
1422 * context then no error is generated but glXImportContextEXT returns
1423 * NULL."
1424 *
1425 * If contextID is None, generate BadContext on the client-side. Other
1426 * sorts of invalid contexts will be detected by the server in the
1427 * __glXIsDirect call.
1428 */
1429 if (contextID == None) {
1430 __glXSendError(dpy, GLXBadContext, contextID, X_GLXIsDirect, false);
1431 return NULL;
1432 }
1433
1434 if (__glXIsDirect(dpy, contextID, NULL))
1435 return NULL;
1436
1437 opcode = __glXSetupForCommand(dpy);
1438 if (!opcode)
1439 return 0;
1440
1441 /* Send the glXQueryContextInfoEXT request */
1442 LockDisplay(dpy);
1443
1444 if (priv->majorVersion > 1 || priv->minorVersion >= 3) {
1445 xGLXQueryContextReq *req;
1446
1447 GetReq(GLXQueryContext, req);
1448
1449 req->reqType = opcode;
1450 req->glxCode = X_GLXQueryContext;
1451 req->context = contextID;
1452 }
1453 else {
1454 xGLXVendorPrivateReq *vpreq;
1455 xGLXQueryContextInfoEXTReq *req;
1456
1457 GetReqExtra(GLXVendorPrivate,
1458 sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq,
1459 vpreq);
1460 req = (xGLXQueryContextInfoEXTReq *) vpreq;
1461 req->reqType = opcode;
1462 req->glxCode = X_GLXVendorPrivateWithReply;
1463 req->vendorCode = X_GLXvop_QueryContextInfoEXT;
1464 req->context = contextID;
1465 }
1466
1467 if (_XReply(dpy, (xReply *) & reply, 0, False) &&
1468 reply.n < (INT32_MAX / 2)) {
1469
1470 for (i = 0; i < reply.n; i++) {
1471 int prop[2];
1472
1473 _XRead(dpy, (char *)prop, sizeof(prop));
1474 switch (prop[0]) {
1475 case GLX_SCREEN:
1476 screen = prop[1];
1477 got_screen = True;
1478 break;
1479 case GLX_SHARE_CONTEXT_EXT:
1480 share = prop[1];
1481 break;
1482 case GLX_VISUAL_ID_EXT:
1483 visualID = prop[1];
1484 break;
1485 case GLX_FBCONFIG_ID:
1486 fbconfigID = prop[1];
1487 break;
1488 case GLX_RENDER_TYPE:
1489 renderType = prop[1];
1490 break;
1491 }
1492 }
1493 }
1494 UnlockDisplay(dpy);
1495 SyncHandle();
1496
1497 if (!got_screen)
1498 return NULL;
1499
1500 psc = GetGLXScreenConfigs(dpy, screen);
1501 if (psc == NULL)
1502 return NULL;
1503
1504 if (fbconfigID != 0) {
1505 mode = glx_config_find_fbconfig(psc->configs, fbconfigID);
1506 } else if (visualID != 0) {
1507 mode = glx_config_find_visual(psc->visuals, visualID);
1508 }
1509
1510 if (mode == NULL)
1511 return NULL;
1512
1513 ctx = indirect_create_context(psc, mode, NULL, renderType);
1514 if (ctx == NULL)
1515 return NULL;
1516
1517 ctx->xid = contextID;
1518 ctx->imported = GL_TRUE;
1519 ctx->share_xid = share;
1520
1521 return (GLXContext) ctx;
1522 }
1523
1524 #endif
1525
1526 _GLX_PUBLIC int
1527 glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value)
1528 {
1529 struct glx_context *ctx = (struct glx_context *) ctx_user;
1530
1531 switch (attribute) {
1532 case GLX_SHARE_CONTEXT_EXT:
1533 *value = ctx->share_xid;
1534 break;
1535 case GLX_VISUAL_ID_EXT:
1536 *value = ctx->config ? ctx->config->visualID : None;
1537 break;
1538 case GLX_SCREEN:
1539 *value = ctx->screen;
1540 break;
1541 case GLX_FBCONFIG_ID:
1542 *value = ctx->config ? ctx->config->fbconfigID : None;
1543 break;
1544 case GLX_RENDER_TYPE:
1545 *value = ctx->renderType;
1546 break;
1547 default:
1548 return GLX_BAD_ATTRIBUTE;
1549 }
1550 return Success;
1551 }
1552
1553 _GLX_PUBLIC
1554 GLX_ALIAS(int, glXQueryContextInfoEXT,
1555 (Display * dpy, GLXContext ctx, int attribute, int *value),
1556 (dpy, ctx, attribute, value), glXQueryContext)
1557
1558 _GLX_PUBLIC GLXContextID glXGetContextIDEXT(const GLXContext ctx_user)
1559 {
1560 struct glx_context *ctx = (struct glx_context *) ctx_user;
1561
1562 return (ctx == NULL) ? None : ctx->xid;
1563 }
1564
1565 _GLX_PUBLIC void
1566 glXFreeContextEXT(Display *dpy, GLXContext ctx)
1567 {
1568 struct glx_context *gc = (struct glx_context *) ctx;
1569
1570 if (gc == NULL || gc->xid == None)
1571 return;
1572
1573 /* The GLX_EXT_import_context spec says:
1574 *
1575 * "glXFreeContext does not free the server-side context information or
1576 * the XID associated with the server-side context."
1577 *
1578 * Don't send any protocol. Just destroy the client-side tracking of the
1579 * context. Also, only release the context structure if it's not current.
1580 */
1581 __glXLock();
1582 if (gc->currentDpy) {
1583 gc->xid = None;
1584 } else {
1585 gc->vtable->destroy(gc);
1586 }
1587 __glXUnlock();
1588 }
1589
1590 _GLX_PUBLIC GLXFBConfig *
1591 glXChooseFBConfig(Display * dpy, int screen,
1592 const int *attribList, int *nitems)
1593 {
1594 struct glx_config **config_list;
1595 int list_size;
1596
1597
1598 config_list = (struct glx_config **)
1599 glXGetFBConfigs(dpy, screen, &list_size);
1600
1601 if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) {
1602 list_size = choose_fbconfig(config_list, list_size, attribList);
1603 if (list_size == 0) {
1604 free(config_list);
1605 config_list = NULL;
1606 }
1607 }
1608
1609 *nitems = list_size;
1610 return (GLXFBConfig *) config_list;
1611 }
1612
1613
1614 _GLX_PUBLIC GLXContext
1615 glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig,
1616 int renderType, GLXContext shareList, Bool allowDirect)
1617 {
1618 struct glx_config *config = (struct glx_config *) fbconfig;
1619 struct glx_config **config_list;
1620 int list_size;
1621 unsigned i;
1622
1623 if (!config) {
1624 __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateNewContext, false);
1625 return NULL;
1626 }
1627
1628 config_list = (struct glx_config **)
1629 glXGetFBConfigs(dpy, config->screen, &list_size);
1630
1631 for (i = 0; i < list_size; i++) {
1632 if (config_list[i] == config)
1633 break;
1634 }
1635 free(config_list);
1636
1637 if (i == list_size) {
1638 __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateNewContext, false);
1639 return NULL;
1640 }
1641
1642 return CreateContext(dpy, config->fbconfigID, config, shareList,
1643 allowDirect, X_GLXCreateNewContext, renderType,
1644 config->screen);
1645 }
1646
1647
1648 _GLX_PUBLIC GLXDrawable
1649 glXGetCurrentReadDrawable(void)
1650 {
1651 struct glx_context *gc = __glXGetCurrentContext();
1652
1653 return gc->currentReadable;
1654 }
1655
1656
1657 _GLX_PUBLIC GLXFBConfig *
1658 glXGetFBConfigs(Display * dpy, int screen, int *nelements)
1659 {
1660 struct glx_display *priv = __glXInitialize(dpy);
1661 struct glx_config **config_list = NULL;
1662 struct glx_config *config;
1663 unsigned num_configs = 0;
1664 int i;
1665
1666 *nelements = 0;
1667 if (priv && (priv->screens != NULL)
1668 && (screen >= 0) && (screen < ScreenCount(dpy))
1669 && (priv->screens[screen]->configs != NULL)
1670 && (priv->screens[screen]->configs->fbconfigID
1671 != (int) GLX_DONT_CARE)) {
1672
1673 for (config = priv->screens[screen]->configs; config != NULL;
1674 config = config->next) {
1675 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1676 num_configs++;
1677 }
1678 }
1679
1680 config_list = malloc(num_configs * sizeof *config_list);
1681 if (config_list != NULL) {
1682 *nelements = num_configs;
1683 i = 0;
1684 for (config = priv->screens[screen]->configs; config != NULL;
1685 config = config->next) {
1686 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1687 config_list[i] = config;
1688 i++;
1689 }
1690 }
1691 }
1692 }
1693
1694 return (GLXFBConfig *) config_list;
1695 }
1696
1697
1698 _GLX_PUBLIC int
1699 glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig,
1700 int attribute, int *value)
1701 {
1702 struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig);
1703
1704 if (config == NULL)
1705 return GLXBadFBConfig;
1706
1707 return glx_config_get(config, attribute, value);
1708 }
1709
1710
1711 _GLX_PUBLIC XVisualInfo *
1712 glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig)
1713 {
1714 XVisualInfo visualTemplate;
1715 struct glx_config *config = (struct glx_config *) fbconfig;
1716 int count;
1717
1718 /*
1719 ** Get a list of all visuals, return if list is empty
1720 */
1721 visualTemplate.visualid = config->visualID;
1722 return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count);
1723 }
1724
1725 #ifndef GLX_USE_APPLEGL
1726 /*
1727 ** GLX_SGI_swap_control
1728 */
1729 static int
1730 __glXSwapIntervalSGI(int interval)
1731 {
1732 xGLXVendorPrivateReq *req;
1733 struct glx_context *gc = __glXGetCurrentContext();
1734 #ifdef GLX_DIRECT_RENDERING
1735 struct glx_screen *psc;
1736 #endif
1737 Display *dpy;
1738 CARD32 *interval_ptr;
1739 CARD8 opcode;
1740
1741 if (gc == &dummyContext) {
1742 return GLX_BAD_CONTEXT;
1743 }
1744
1745 if (interval <= 0) {
1746 return GLX_BAD_VALUE;
1747 }
1748
1749 #ifdef GLX_DIRECT_RENDERING
1750 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1751
1752 if (gc->isDirect && psc && psc->driScreen &&
1753 psc->driScreen->setSwapInterval) {
1754 __GLXDRIdrawable *pdraw =
1755 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1756 /* Simply ignore the command if the GLX drawable has been destroyed but
1757 * the context is still bound.
1758 */
1759 if (pdraw)
1760 psc->driScreen->setSwapInterval(pdraw, interval);
1761 return 0;
1762 }
1763 #endif
1764
1765 dpy = gc->currentDpy;
1766 opcode = __glXSetupForCommand(dpy);
1767 if (!opcode) {
1768 return 0;
1769 }
1770
1771 /* Send the glXSwapIntervalSGI request */
1772 LockDisplay(dpy);
1773 GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req);
1774 req->reqType = opcode;
1775 req->glxCode = X_GLXVendorPrivate;
1776 req->vendorCode = X_GLXvop_SwapIntervalSGI;
1777 req->contextTag = gc->currentContextTag;
1778
1779 interval_ptr = (CARD32 *) (req + 1);
1780 *interval_ptr = interval;
1781
1782 UnlockDisplay(dpy);
1783 SyncHandle();
1784 XFlush(dpy);
1785
1786 return 0;
1787 }
1788
1789
1790 /*
1791 ** GLX_MESA_swap_control
1792 */
1793 static int
1794 __glXSwapIntervalMESA(unsigned int interval)
1795 {
1796 #ifdef GLX_DIRECT_RENDERING
1797 struct glx_context *gc = __glXGetCurrentContext();
1798
1799 if (gc != &dummyContext && gc->isDirect) {
1800 struct glx_screen *psc;
1801
1802 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1803 if (psc && psc->driScreen && psc->driScreen->setSwapInterval) {
1804 __GLXDRIdrawable *pdraw =
1805 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1806
1807 /* Simply ignore the command if the GLX drawable has been destroyed but
1808 * the context is still bound.
1809 */
1810 if (!pdraw)
1811 return 0;
1812
1813 return psc->driScreen->setSwapInterval(pdraw, interval);
1814 }
1815 }
1816 #endif
1817
1818 return GLX_BAD_CONTEXT;
1819 }
1820
1821
1822 static int
1823 __glXGetSwapIntervalMESA(void)
1824 {
1825 #ifdef GLX_DIRECT_RENDERING
1826 struct glx_context *gc = __glXGetCurrentContext();
1827
1828 if (gc != &dummyContext && gc->isDirect) {
1829 struct glx_screen *psc;
1830
1831 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1832 if (psc && psc->driScreen && psc->driScreen->getSwapInterval) {
1833 __GLXDRIdrawable *pdraw =
1834 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1835 if (pdraw)
1836 return psc->driScreen->getSwapInterval(pdraw);
1837 }
1838 }
1839 #endif
1840
1841 return 0;
1842 }
1843
1844
1845 /*
1846 ** GLX_SGI_video_sync
1847 */
1848 static int
1849 __glXGetVideoSyncSGI(unsigned int *count)
1850 {
1851 #ifdef GLX_DIRECT_RENDERING
1852 int64_t ust, msc, sbc;
1853 int ret;
1854 struct glx_context *gc = __glXGetCurrentContext();
1855 struct glx_screen *psc;
1856 __GLXDRIdrawable *pdraw;
1857
1858 if (gc == &dummyContext)
1859 return GLX_BAD_CONTEXT;
1860
1861 if (!gc->isDirect)
1862 return GLX_BAD_CONTEXT;
1863
1864 psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen);
1865 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1866
1867 /* FIXME: Looking at the GLX_SGI_video_sync spec in the extension registry,
1868 * FIXME: there should be a GLX encoding for this call. I can find no
1869 * FIXME: documentation for the GLX encoding.
1870 */
1871 if (psc && psc->driScreen && psc->driScreen->getDrawableMSC) {
1872 ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc);
1873 *count = (unsigned) msc;
1874 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1875 }
1876 #endif
1877
1878 return GLX_BAD_CONTEXT;
1879 }
1880
1881 static int
1882 __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
1883 {
1884 struct glx_context *gc = __glXGetCurrentContext();
1885 #ifdef GLX_DIRECT_RENDERING
1886 struct glx_screen *psc;
1887 __GLXDRIdrawable *pdraw;
1888 int64_t ust, msc, sbc;
1889 int ret;
1890 #endif
1891
1892 if (divisor <= 0 || remainder < 0)
1893 return GLX_BAD_VALUE;
1894
1895 if (gc == &dummyContext)
1896 return GLX_BAD_CONTEXT;
1897
1898 #ifdef GLX_DIRECT_RENDERING
1899 if (!gc->isDirect)
1900 return GLX_BAD_CONTEXT;
1901
1902 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1903 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1904
1905 if (psc && psc->driScreen && psc->driScreen->waitForMSC) {
1906 ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc,
1907 &sbc);
1908 *count = (unsigned) msc;
1909 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1910 }
1911 #endif
1912
1913 return GLX_BAD_CONTEXT;
1914 }
1915
1916 #endif /* GLX_USE_APPLEGL */
1917
1918 /*
1919 ** GLX_SGIX_fbconfig
1920 ** Many of these functions are aliased to GLX 1.3 entry points in the
1921 ** GLX_functions table.
1922 */
1923
1924 _GLX_PUBLIC
1925 GLX_ALIAS(int, glXGetFBConfigAttribSGIX,
1926 (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value),
1927 (dpy, config, attribute, value), glXGetFBConfigAttrib)
1928
1929 _GLX_PUBLIC GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX,
1930 (Display * dpy, int screen, int *attrib_list,
1931 int *nelements), (dpy, screen, attrib_list, nelements),
1932 glXChooseFBConfig)
1933
1934 _GLX_PUBLIC GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX,
1935 (Display * dpy, GLXFBConfigSGIX config),
1936 (dpy, config), glXGetVisualFromFBConfig)
1937
1938 _GLX_PUBLIC GLXPixmap
1939 glXCreateGLXPixmapWithConfigSGIX(Display * dpy,
1940 GLXFBConfigSGIX fbconfig,
1941 Pixmap pixmap)
1942 {
1943 #ifndef GLX_USE_APPLEGL
1944 xGLXVendorPrivateWithReplyReq *vpreq;
1945 xGLXCreateGLXPixmapWithConfigSGIXReq *req;
1946 GLXPixmap xid = None;
1947 CARD8 opcode;
1948 struct glx_screen *psc;
1949 #endif
1950 struct glx_config *config = (struct glx_config *) fbconfig;
1951
1952
1953 if ((dpy == NULL) || (config == NULL)) {
1954 return None;
1955 }
1956 #ifdef GLX_USE_APPLEGL
1957 if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config))
1958 return None;
1959 return pixmap;
1960 #else
1961
1962 psc = GetGLXScreenConfigs(dpy, config->screen);
1963 if ((psc != NULL)
1964 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1965 opcode = __glXSetupForCommand(dpy);
1966 if (!opcode) {
1967 return None;
1968 }
1969
1970 /* Send the glXCreateGLXPixmapWithConfigSGIX request */
1971 LockDisplay(dpy);
1972 GetReqExtra(GLXVendorPrivateWithReply,
1973 sz_xGLXCreateGLXPixmapWithConfigSGIXReq -
1974 sz_xGLXVendorPrivateWithReplyReq, vpreq);
1975 req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq;
1976 req->reqType = opcode;
1977 req->glxCode = X_GLXVendorPrivateWithReply;
1978 req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX;
1979 req->screen = config->screen;
1980 req->fbconfig = config->fbconfigID;
1981 req->pixmap = pixmap;
1982 req->glxpixmap = xid = XAllocID(dpy);
1983 UnlockDisplay(dpy);
1984 SyncHandle();
1985 }
1986
1987 return xid;
1988 #endif
1989 }
1990
1991 _GLX_PUBLIC GLXContext
1992 glXCreateContextWithConfigSGIX(Display * dpy,
1993 GLXFBConfigSGIX fbconfig, int renderType,
1994 GLXContext shareList, Bool allowDirect)
1995 {
1996 GLXContext gc = NULL;
1997 struct glx_config *config = (struct glx_config *) fbconfig;
1998 struct glx_screen *psc;
1999
2000
2001 if ((dpy == NULL) || (config == NULL)) {
2002 return None;
2003 }
2004
2005 psc = GetGLXScreenConfigs(dpy, config->screen);
2006 if ((psc != NULL)
2007 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
2008 gc = CreateContext(dpy, config->fbconfigID, config, shareList,
2009 allowDirect,
2010 X_GLXvop_CreateContextWithConfigSGIX, renderType,
2011 config->screen);
2012 }
2013
2014 return gc;
2015 }
2016
2017
2018 _GLX_PUBLIC GLXFBConfigSGIX
2019 glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis)
2020 {
2021 struct glx_display *priv;
2022 struct glx_screen *psc = NULL;
2023
2024 if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success)
2025 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)
2026 && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) {
2027 return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs,
2028 vis->visualid);
2029 }
2030
2031 return NULL;
2032 }
2033
2034 #ifndef GLX_USE_APPLEGL
2035 /*
2036 ** GLX_OML_sync_control
2037 */
2038 static Bool
2039 __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable,
2040 int64_t * ust, int64_t * msc, int64_t * sbc)
2041 {
2042 struct glx_display * const priv = __glXInitialize(dpy);
2043 #ifdef GLX_DIRECT_RENDERING
2044 int ret;
2045 __GLXDRIdrawable *pdraw;
2046 struct glx_screen *psc;
2047 #endif
2048
2049 if (!priv)
2050 return False;
2051
2052 #ifdef GLX_DIRECT_RENDERING
2053 pdraw = GetGLXDRIDrawable(dpy, drawable);
2054 psc = pdraw ? pdraw->psc : NULL;
2055 if (pdraw && psc->driScreen->getDrawableMSC) {
2056 ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc);
2057 return ret;
2058 }
2059 #endif
2060
2061 return False;
2062 }
2063
2064 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2065 _X_HIDDEN GLboolean
2066 __glxGetMscRate(struct glx_screen *psc,
2067 int32_t * numerator, int32_t * denominator)
2068 {
2069 #if !defined(GLX_USE_WINDOWSGL)
2070 XF86VidModeModeLine mode_line;
2071 int dot_clock;
2072 int i;
2073
2074 if (XF86VidModeQueryVersion(psc->dpy, &i, &i) &&
2075 XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) {
2076 unsigned n = dot_clock * 1000;
2077 unsigned d = mode_line.vtotal * mode_line.htotal;
2078
2079 # define V_INTERLACE 0x010
2080 # define V_DBLSCAN 0x020
2081
2082 if (mode_line.flags & V_INTERLACE)
2083 n *= 2;
2084 else if (mode_line.flags & V_DBLSCAN)
2085 d *= 2;
2086
2087 /* The OML_sync_control spec requires that if the refresh rate is a
2088 * whole number, that the returned numerator be equal to the refresh
2089 * rate and the denominator be 1.
2090 */
2091
2092 if (n % d == 0) {
2093 n /= d;
2094 d = 1;
2095 }
2096 else {
2097 static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 };
2098
2099 /* This is a poor man's way to reduce a fraction. It's far from
2100 * perfect, but it will work well enough for this situation.
2101 */
2102
2103 for (i = 0; f[i] != 0; i++) {
2104 while (n % f[i] == 0 && d % f[i] == 0) {
2105 d /= f[i];
2106 n /= f[i];
2107 }
2108 }
2109 }
2110
2111 *numerator = n;
2112 *denominator = d;
2113
2114 return True;
2115 }
2116 #endif
2117
2118 return False;
2119 }
2120 #endif
2121
2122 /**
2123 * Determine the refresh rate of the specified drawable and display.
2124 *
2125 * \param dpy Display whose refresh rate is to be determined.
2126 * \param drawable Drawable whose refresh rate is to be determined.
2127 * \param numerator Numerator of the refresh rate.
2128 * \param demoninator Denominator of the refresh rate.
2129 * \return If the refresh rate for the specified display and drawable could
2130 * be calculated, True is returned. Otherwise False is returned.
2131 *
2132 * \note This function is implemented entirely client-side. A lot of other
2133 * functionality is required to export GLX_OML_sync_control, so on
2134 * XFree86 this function can be called for direct-rendering contexts
2135 * when GLX_OML_sync_control appears in the client extension string.
2136 */
2137
2138 _X_HIDDEN GLboolean
2139 __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
2140 int32_t * numerator, int32_t * denominator)
2141 {
2142 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) && !defined(GLX_USE_WINDOWSGL)
2143 __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable);
2144
2145 if (draw == NULL)
2146 return False;
2147
2148 return __glxGetMscRate(draw->psc, numerator, denominator);
2149 #else
2150 (void) dpy;
2151 (void) drawable;
2152 (void) numerator;
2153 (void) denominator;
2154 #endif
2155 return False;
2156 }
2157
2158
2159 static int64_t
2160 __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable,
2161 int64_t target_msc, int64_t divisor, int64_t remainder)
2162 {
2163 struct glx_context *gc = __glXGetCurrentContext();
2164 #ifdef GLX_DIRECT_RENDERING
2165 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2166 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2167 #endif
2168
2169 if (gc == &dummyContext) /* no GLX for this */
2170 return -1;
2171
2172 #ifdef GLX_DIRECT_RENDERING
2173 if (!pdraw || !gc->isDirect)
2174 return -1;
2175 #endif
2176
2177 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2178 * error", but it also says "It [glXSwapBuffersMscOML] will return a value
2179 * of -1 if the function failed because of errors detected in the input
2180 * parameters"
2181 */
2182 if (divisor < 0 || remainder < 0 || target_msc < 0)
2183 return -1;
2184 if (divisor > 0 && remainder >= divisor)
2185 return -1;
2186
2187 if (target_msc == 0 && divisor == 0 && remainder == 0)
2188 remainder = 1;
2189
2190 #ifdef GLX_DIRECT_RENDERING
2191 if (psc->driScreen && psc->driScreen->swapBuffers)
2192 return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor,
2193 remainder, False);
2194 #endif
2195
2196 return -1;
2197 }
2198
2199
2200 static Bool
2201 __glXWaitForMscOML(Display * dpy, GLXDrawable drawable,
2202 int64_t target_msc, int64_t divisor,
2203 int64_t remainder, int64_t * ust,
2204 int64_t * msc, int64_t * sbc)
2205 {
2206 #ifdef GLX_DIRECT_RENDERING
2207 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2208 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2209 int ret;
2210 #endif
2211
2212
2213 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2214 * error", but the return type in the spec is Bool.
2215 */
2216 if (divisor < 0 || remainder < 0 || target_msc < 0)
2217 return False;
2218 if (divisor > 0 && remainder >= divisor)
2219 return False;
2220
2221 #ifdef GLX_DIRECT_RENDERING
2222 if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) {
2223 ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder,
2224 ust, msc, sbc);
2225 return ret;
2226 }
2227 #endif
2228
2229 return False;
2230 }
2231
2232
2233 static Bool
2234 __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable,
2235 int64_t target_sbc, int64_t * ust,
2236 int64_t * msc, int64_t * sbc)
2237 {
2238 #ifdef GLX_DIRECT_RENDERING
2239 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2240 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2241 int ret;
2242 #endif
2243
2244 /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE
2245 * error", but the return type in the spec is Bool.
2246 */
2247 if (target_sbc < 0)
2248 return False;
2249
2250 #ifdef GLX_DIRECT_RENDERING
2251 if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) {
2252 ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc);
2253 return ret;
2254 }
2255 #endif
2256
2257 return False;
2258 }
2259
2260 /*@}*/
2261
2262
2263 /**
2264 * Mesa extension stubs. These will help reduce portability problems.
2265 */
2266 /*@{*/
2267
2268 /**
2269 * Release all buffers associated with the specified GLX drawable.
2270 *
2271 * \todo
2272 * This function was intended for stand-alone Mesa. The issue there is that
2273 * the library doesn't get any notification when a window is closed. In
2274 * DRI there is a similar but slightly different issue. When GLX 1.3 is
2275 * supported, there are 3 different functions to destroy a drawable. It
2276 * should be possible to create GLX protocol (or have it determine which
2277 * protocol to use based on the type of the drawable) to have one function
2278 * do the work of 3. For the direct-rendering case, this function could
2279 * just call the driver's \c __DRIdrawableRec::destroyDrawable function.
2280 * This would reduce the frequency with which \c __driGarbageCollectDrawables
2281 * would need to be used. This really should be done as part of the new DRI
2282 * interface work.
2283 *
2284 * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt
2285 * __driGarbageCollectDrawables
2286 * glXDestroyGLXPixmap
2287 * glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow
2288 * glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX
2289 */
2290 static Bool
2291 __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d)
2292 {
2293 (void) dpy;
2294 (void) d;
2295 return False;
2296 }
2297
2298
2299 _GLX_PUBLIC GLXPixmap
2300 glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual,
2301 Pixmap pixmap, Colormap cmap)
2302 {
2303 (void) dpy;
2304 (void) visual;
2305 (void) pixmap;
2306 (void) cmap;
2307 return 0;
2308 }
2309
2310 /*@}*/
2311
2312
2313 /**
2314 * GLX_MESA_copy_sub_buffer
2315 */
2316 #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */
2317 static void
2318 __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable,
2319 int x, int y, int width, int height)
2320 {
2321 xGLXVendorPrivateReq *req;
2322 struct glx_context *gc;
2323 GLXContextTag tag;
2324 CARD32 *drawable_ptr;
2325 INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr;
2326 CARD8 opcode;
2327
2328 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2329 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2330 if (pdraw != NULL) {
2331 struct glx_screen *psc = pdraw->psc;
2332 if (psc->driScreen->copySubBuffer != NULL) {
2333 (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height, True);
2334 }
2335
2336 return;
2337 }
2338 #endif
2339
2340 opcode = __glXSetupForCommand(dpy);
2341 if (!opcode)
2342 return;
2343
2344 /*
2345 ** The calling thread may or may not have a current context. If it
2346 ** does, send the context tag so the server can do a flush.
2347 */
2348 gc = __glXGetCurrentContext();
2349 if ((gc != &dummyContext) && (dpy == gc->currentDpy) &&
2350 ((drawable == gc->currentDrawable) ||
2351 (drawable == gc->currentReadable))) {
2352 tag = gc->currentContextTag;
2353 }
2354 else {
2355 tag = 0;
2356 }
2357
2358 LockDisplay(dpy);
2359 GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req);
2360 req->reqType = opcode;
2361 req->glxCode = X_GLXVendorPrivate;
2362 req->vendorCode = X_GLXvop_CopySubBufferMESA;
2363 req->contextTag = tag;
2364
2365 drawable_ptr = (CARD32 *) (req + 1);
2366 x_ptr = (INT32 *) (drawable_ptr + 1);
2367 y_ptr = (INT32 *) (drawable_ptr + 2);
2368 w_ptr = (INT32 *) (drawable_ptr + 3);
2369 h_ptr = (INT32 *) (drawable_ptr + 4);
2370
2371 *drawable_ptr = drawable;
2372 *x_ptr = x;
2373 *y_ptr = y;
2374 *w_ptr = width;
2375 *h_ptr = height;
2376
2377 UnlockDisplay(dpy);
2378 SyncHandle();
2379 }
2380
2381 /*@{*/
2382 static void
2383 __glXBindTexImageEXT(Display * dpy,
2384 GLXDrawable drawable, int buffer, const int *attrib_list)
2385 {
2386 struct glx_context *gc = __glXGetCurrentContext();
2387
2388 if (gc->vtable->bind_tex_image == NULL)
2389 return;
2390
2391 gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list);
2392 }
2393
2394 static void
2395 __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer)
2396 {
2397 struct glx_context *gc = __glXGetCurrentContext();
2398
2399 if (gc->vtable->release_tex_image == NULL)
2400 return;
2401
2402 gc->vtable->release_tex_image(dpy, drawable, buffer);
2403 }
2404
2405 /*@}*/
2406
2407 #endif /* GLX_USE_APPLEGL */
2408
2409 /*
2410 ** glXGetProcAddress support
2411 */
2412
2413 struct name_address_pair
2414 {
2415 const char *Name;
2416 GLvoid *Address;
2417 };
2418
2419 #define GLX_FUNCTION(f) { # f, (GLvoid *) f }
2420 #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f }
2421
2422 static const struct name_address_pair GLX_functions[] = {
2423 /*** GLX_VERSION_1_0 ***/
2424 GLX_FUNCTION(glXChooseVisual),
2425 GLX_FUNCTION(glXCopyContext),
2426 GLX_FUNCTION(glXCreateContext),
2427 GLX_FUNCTION(glXCreateGLXPixmap),
2428 GLX_FUNCTION(glXDestroyContext),
2429 GLX_FUNCTION(glXDestroyGLXPixmap),
2430 GLX_FUNCTION(glXGetConfig),
2431 GLX_FUNCTION(glXGetCurrentContext),
2432 GLX_FUNCTION(glXGetCurrentDrawable),
2433 GLX_FUNCTION(glXIsDirect),
2434 GLX_FUNCTION(glXMakeCurrent),
2435 GLX_FUNCTION(glXQueryExtension),
2436 GLX_FUNCTION(glXQueryVersion),
2437 GLX_FUNCTION(glXSwapBuffers),
2438 GLX_FUNCTION(glXUseXFont),
2439 GLX_FUNCTION(glXWaitGL),
2440 GLX_FUNCTION(glXWaitX),
2441
2442 /*** GLX_VERSION_1_1 ***/
2443 GLX_FUNCTION(glXGetClientString),
2444 GLX_FUNCTION(glXQueryExtensionsString),
2445 GLX_FUNCTION(glXQueryServerString),
2446
2447 /*** GLX_VERSION_1_2 ***/
2448 GLX_FUNCTION(glXGetCurrentDisplay),
2449
2450 /*** GLX_VERSION_1_3 ***/
2451 GLX_FUNCTION(glXChooseFBConfig),
2452 GLX_FUNCTION(glXCreateNewContext),
2453 GLX_FUNCTION(glXCreatePbuffer),
2454 GLX_FUNCTION(glXCreatePixmap),
2455 GLX_FUNCTION(glXCreateWindow),
2456 GLX_FUNCTION(glXDestroyPbuffer),
2457 GLX_FUNCTION(glXDestroyPixmap),
2458 GLX_FUNCTION(glXDestroyWindow),
2459 GLX_FUNCTION(glXGetCurrentReadDrawable),
2460 GLX_FUNCTION(glXGetFBConfigAttrib),
2461 GLX_FUNCTION(glXGetFBConfigs),
2462 GLX_FUNCTION(glXGetSelectedEvent),
2463 GLX_FUNCTION(glXGetVisualFromFBConfig),
2464 GLX_FUNCTION(glXMakeContextCurrent),
2465 GLX_FUNCTION(glXQueryContext),
2466 GLX_FUNCTION(glXQueryDrawable),
2467 GLX_FUNCTION(glXSelectEvent),
2468
2469 #ifndef GLX_USE_APPLEGL
2470 /*** GLX_SGI_swap_control ***/
2471 GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI),
2472
2473 /*** GLX_SGI_video_sync ***/
2474 GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI),
2475 GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI),
2476
2477 /*** GLX_SGI_make_current_read ***/
2478 GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent),
2479 GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable),
2480
2481 /*** GLX_EXT_import_context ***/
2482 GLX_FUNCTION(glXFreeContextEXT),
2483 GLX_FUNCTION(glXGetContextIDEXT),
2484 GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay),
2485 GLX_FUNCTION(glXImportContextEXT),
2486 GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext),
2487 #endif
2488
2489 /*** GLX_SGIX_fbconfig ***/
2490 GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib),
2491 GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig),
2492 GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX),
2493 GLX_FUNCTION(glXCreateContextWithConfigSGIX),
2494 GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig),
2495 GLX_FUNCTION(glXGetFBConfigFromVisualSGIX),
2496
2497 #ifndef GLX_USE_APPLEGL
2498 /*** GLX_SGIX_pbuffer ***/
2499 GLX_FUNCTION(glXCreateGLXPbufferSGIX),
2500 GLX_FUNCTION(glXDestroyGLXPbufferSGIX),
2501 GLX_FUNCTION(glXQueryGLXPbufferSGIX),
2502 GLX_FUNCTION(glXSelectEventSGIX),
2503 GLX_FUNCTION(glXGetSelectedEventSGIX),
2504
2505 /*** GLX_MESA_copy_sub_buffer ***/
2506 GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA),
2507
2508 /*** GLX_MESA_pixmap_colormap ***/
2509 GLX_FUNCTION(glXCreateGLXPixmapMESA),
2510
2511 /*** GLX_MESA_release_buffers ***/
2512 GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA),
2513
2514 /*** GLX_MESA_swap_control ***/
2515 GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA),
2516 GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA),
2517 #endif
2518
2519 /*** GLX_ARB_get_proc_address ***/
2520 GLX_FUNCTION(glXGetProcAddressARB),
2521
2522 /*** GLX 1.4 ***/
2523 GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB),
2524
2525 #ifndef GLX_USE_APPLEGL
2526 /*** GLX_OML_sync_control ***/
2527 GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML),
2528 GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML),
2529 GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML),
2530 GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML),
2531 GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML),
2532
2533 /*** GLX_EXT_texture_from_pixmap ***/
2534 GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT),
2535 GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT),
2536 #endif
2537
2538 #if defined(GLX_DIRECT_RENDERING) && defined(GLX_USE_DRM)
2539 /*** DRI configuration ***/
2540 GLX_FUNCTION(glXGetScreenDriver),
2541 GLX_FUNCTION(glXGetDriverConfig),
2542 #endif
2543
2544 /*** GLX_ARB_create_context and GLX_ARB_create_context_profile ***/
2545 GLX_FUNCTION(glXCreateContextAttribsARB),
2546
2547 /*** GLX_MESA_query_renderer ***/
2548 GLX_FUNCTION(glXQueryRendererIntegerMESA),
2549 GLX_FUNCTION(glXQueryRendererStringMESA),
2550 GLX_FUNCTION(glXQueryCurrentRendererIntegerMESA),
2551 GLX_FUNCTION(glXQueryCurrentRendererStringMESA),
2552
2553 {NULL, NULL} /* end of list */
2554 };
2555
2556 static const GLvoid *
2557 get_glx_proc_address(const char *funcName)
2558 {
2559 GLuint i;
2560
2561 /* try static functions */
2562 for (i = 0; GLX_functions[i].Name; i++) {
2563 if (strcmp(GLX_functions[i].Name, funcName) == 0)
2564 return GLX_functions[i].Address;
2565 }
2566
2567 return NULL;
2568 }
2569
2570 /**
2571 * Get the address of a named GL function. This is the pre-GLX 1.4 name for
2572 * \c glXGetProcAddress.
2573 *
2574 * \param procName Name of a GL or GLX function.
2575 * \returns A pointer to the named function
2576 *
2577 * \sa glXGetProcAddress
2578 */
2579 _GLX_PUBLIC void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
2580 {
2581 typedef void (*gl_function) (void);
2582 gl_function f;
2583
2584
2585 /* Search the table of GLX and internal functions first. If that
2586 * fails and the supplied name could be a valid core GL name, try
2587 * searching the core GL function table. This check is done to prevent
2588 * DRI based drivers from searching the core GL function table for
2589 * internal API functions.
2590 */
2591 f = (gl_function) get_glx_proc_address((const char *) procName);
2592 if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l')
2593 && (procName[2] != 'X')) {
2594 #ifdef GLX_INDIRECT_RENDERING
2595 f = (gl_function) __indirect_get_proc_address((const char *) procName);
2596 #endif
2597 if (!f)
2598 f = (gl_function) _glapi_get_proc_address((const char *) procName);
2599 if (!f) {
2600 struct glx_context *gc = __glXGetCurrentContext();
2601
2602 if (gc != NULL && gc->vtable->get_proc_address != NULL)
2603 f = gc->vtable->get_proc_address((const char *) procName);
2604 }
2605 }
2606 return f;
2607 }
2608
2609 /**
2610 * Get the address of a named GL function. This is the GLX 1.4 name for
2611 * \c glXGetProcAddressARB.
2612 *
2613 * \param procName Name of a GL or GLX function.
2614 * \returns A pointer to the named function
2615 *
2616 * \sa glXGetProcAddressARB
2617 */
2618 _GLX_PUBLIC
2619 GLX_ALIAS(__GLXextFuncPtr, glXGetProcAddress,
2620 (const GLubyte * procName),
2621 (procName), glXGetProcAddressARB)
2622
2623 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2624 /**
2625 * Get the unadjusted system time (UST). Currently, the UST is measured in
2626 * microseconds since Epoc. The actual resolution of the UST may vary from
2627 * system to system, and the units may vary from release to release.
2628 * Drivers should not call this function directly. They should instead use
2629 * \c glXGetProcAddress to obtain a pointer to the function.
2630 *
2631 * \param ust Location to store the 64-bit UST
2632 * \returns Zero on success or a negative errno value on failure.
2633 *
2634 * \sa glXGetProcAddress, PFNGLXGETUSTPROC
2635 *
2636 * \since Internal API version 20030317.
2637 */
2638 _X_HIDDEN int
2639 __glXGetUST(int64_t * ust)
2640 {
2641 struct timeval tv;
2642
2643 if (ust == NULL) {
2644 return -EFAULT;
2645 }
2646
2647 if (gettimeofday(&tv, NULL) == 0) {
2648 ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
2649 return 0;
2650 }
2651 else {
2652 return -errno;
2653 }
2654 }
2655 #endif /* GLX_DIRECT_RENDERING */
2656
2657 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2658
2659 PUBLIC int
2660 MesaGLInteropGLXQueryDeviceInfo(Display *dpy, GLXContext context,
2661 struct mesa_glinterop_device_info *out)
2662 {
2663 struct glx_context *gc = (struct glx_context*)context;
2664 int ret;
2665
2666 __glXLock();
2667
2668 if (!gc || gc->xid == None || !gc->isDirect) {
2669 __glXUnlock();
2670 return MESA_GLINTEROP_INVALID_CONTEXT;
2671 }
2672
2673 if (!gc->vtable->interop_query_device_info) {
2674 __glXUnlock();
2675 return MESA_GLINTEROP_UNSUPPORTED;
2676 }
2677
2678 ret = gc->vtable->interop_query_device_info(gc, out);
2679 __glXUnlock();
2680 return ret;
2681 }
2682
2683 PUBLIC int
2684 MesaGLInteropGLXExportObject(Display *dpy, GLXContext context,
2685 struct mesa_glinterop_export_in *in,
2686 struct mesa_glinterop_export_out *out)
2687 {
2688 struct glx_context *gc = (struct glx_context*)context;
2689 int ret;
2690
2691 __glXLock();
2692
2693 if (!gc || gc->xid == None || !gc->isDirect) {
2694 __glXUnlock();
2695 return MESA_GLINTEROP_INVALID_CONTEXT;
2696 }
2697
2698 if (!gc->vtable->interop_export_object) {
2699 __glXUnlock();
2700 return MESA_GLINTEROP_UNSUPPORTED;
2701 }
2702
2703 ret = gc->vtable->interop_export_object(gc, in, out);
2704 __glXUnlock();
2705 return ret;
2706 }
2707
2708 #endif /* defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) */