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43c473bc47b2aac7320d6c588e9f635389c082df
[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_glx_context.h"
45 #include "apple_glx.h"
46 #else
47 #include <sys/time.h>
48 #ifdef XF86VIDMODE
49 #include <X11/extensions/xf86vmode.h>
50 #endif
51 #include "xf86dri.h"
52 #endif
53 #else
54 #endif
55
56 #include <X11/Xlib-xcb.h>
57 #include <xcb/xcb.h>
58 #include <xcb/glx.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 switch (renderType) {
240 case GLX_RGBA_TYPE:
241 return (config->renderType & GLX_RGBA_BIT) != 0;
242 case GLX_COLOR_INDEX_TYPE:
243 return (config->renderType & GLX_COLOR_INDEX_BIT) != 0;
244 case GLX_RGBA_FLOAT_TYPE_ARB:
245 return (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) != 0;
246 case GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT:
247 return (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) != 0;
248 default:
249 break;
250 }
251 return 0;
252 }
253
254 _X_HIDDEN Bool
255 glx_context_init(struct glx_context *gc,
256 struct glx_screen *psc, struct glx_config *config)
257 {
258 gc->majorOpcode = __glXSetupForCommand(psc->display->dpy);
259 if (!gc->majorOpcode)
260 return False;
261
262 gc->screen = psc->scr;
263 gc->psc = psc;
264 gc->config = config;
265 gc->isDirect = GL_TRUE;
266 gc->currentContextTag = -1;
267
268 return True;
269 }
270
271
272 /**
273 * Create a new context.
274 *
275 * \param renderType For FBConfigs, what is the rendering type?
276 */
277
278 static GLXContext
279 CreateContext(Display *dpy, int generic_id, struct glx_config *config,
280 GLXContext shareList_user, Bool allowDirect,
281 unsigned code, int renderType, int screen)
282 {
283 struct glx_context *gc;
284 struct glx_screen *psc;
285 struct glx_context *shareList = (struct glx_context *) shareList_user;
286 if (dpy == NULL)
287 return NULL;
288
289 psc = GetGLXScreenConfigs(dpy, screen);
290 if (psc == NULL)
291 return NULL;
292
293 if (generic_id == None)
294 return NULL;
295
296 gc = NULL;
297 #ifdef GLX_USE_APPLEGL
298 gc = applegl_create_context(psc, config, shareList, renderType);
299 #else
300 if (allowDirect && psc->vtable->create_context)
301 gc = psc->vtable->create_context(psc, config, shareList, renderType);
302 if (!gc)
303 gc = indirect_create_context(psc, config, shareList, renderType);
304 #endif
305 if (!gc)
306 return NULL;
307
308 LockDisplay(dpy);
309 switch (code) {
310 case X_GLXCreateContext: {
311 xGLXCreateContextReq *req;
312
313 /* Send the glXCreateContext request */
314 GetReq(GLXCreateContext, req);
315 req->reqType = gc->majorOpcode;
316 req->glxCode = X_GLXCreateContext;
317 req->context = gc->xid = XAllocID(dpy);
318 req->visual = generic_id;
319 req->screen = screen;
320 req->shareList = shareList ? shareList->xid : None;
321 req->isDirect = gc->isDirect;
322 break;
323 }
324
325 case X_GLXCreateNewContext: {
326 xGLXCreateNewContextReq *req;
327
328 /* Send the glXCreateNewContext request */
329 GetReq(GLXCreateNewContext, req);
330 req->reqType = gc->majorOpcode;
331 req->glxCode = X_GLXCreateNewContext;
332 req->context = gc->xid = XAllocID(dpy);
333 req->fbconfig = generic_id;
334 req->screen = screen;
335 req->renderType = renderType;
336 req->shareList = shareList ? shareList->xid : None;
337 req->isDirect = gc->isDirect;
338 break;
339 }
340
341 case X_GLXvop_CreateContextWithConfigSGIX: {
342 xGLXVendorPrivateWithReplyReq *vpreq;
343 xGLXCreateContextWithConfigSGIXReq *req;
344
345 /* Send the glXCreateNewContext request */
346 GetReqExtra(GLXVendorPrivateWithReply,
347 sz_xGLXCreateContextWithConfigSGIXReq -
348 sz_xGLXVendorPrivateWithReplyReq, vpreq);
349 req = (xGLXCreateContextWithConfigSGIXReq *) vpreq;
350 req->reqType = gc->majorOpcode;
351 req->glxCode = X_GLXVendorPrivateWithReply;
352 req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX;
353 req->context = gc->xid = XAllocID(dpy);
354 req->fbconfig = generic_id;
355 req->screen = screen;
356 req->renderType = renderType;
357 req->shareList = shareList ? shareList->xid : None;
358 req->isDirect = gc->isDirect;
359 break;
360 }
361
362 default:
363 /* What to do here? This case is the sign of an internal error. It
364 * should never be reachable.
365 */
366 break;
367 }
368
369 UnlockDisplay(dpy);
370 SyncHandle();
371
372 gc->share_xid = shareList ? shareList->xid : None;
373 gc->imported = GL_FALSE;
374
375 return (GLXContext) gc;
376 }
377
378 _X_EXPORT GLXContext
379 glXCreateContext(Display * dpy, XVisualInfo * vis,
380 GLXContext shareList, Bool allowDirect)
381 {
382 struct glx_config *config = NULL;
383 int renderType = GLX_RGBA_TYPE;
384
385 #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL)
386 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen);
387
388 if (psc)
389 config = glx_config_find_visual(psc->visuals, vis->visualid);
390
391 if (config == NULL) {
392 xError error;
393
394 error.errorCode = BadValue;
395 error.resourceID = vis->visualid;
396 error.sequenceNumber = dpy->request;
397 error.type = X_Error;
398 error.majorCode = __glXSetupForCommand(dpy);
399 error.minorCode = X_GLXCreateContext;
400 _XError(dpy, &error);
401 return None;
402 }
403
404 /* Choose the context render type based on DRI config values. It is
405 * unusual to set this type from config, but we have no other choice, as
406 * this old API does not provide renderType parameter.
407 */
408 if (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) {
409 renderType = GLX_RGBA_FLOAT_TYPE_ARB;
410 } else if (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) {
411 renderType = GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT;
412 } else if (config->renderType & GLX_RGBA_BIT) {
413 renderType = GLX_RGBA_TYPE;
414 } else if (config->renderType & GLX_COLOR_INDEX_BIT) {
415 renderType = GLX_COLOR_INDEX_TYPE;
416 } else if (config->rgbMode) {
417 /* If we're here, then renderType is not set correctly. Let's use a
418 * safeguard - any TrueColor or DirectColor mode is RGB mode. Such
419 * default value is needed by old DRI drivers, which didn't set
420 * renderType correctly as the value was just ignored.
421 */
422 renderType = GLX_RGBA_TYPE;
423 } else {
424 /* Safeguard - only one option left, all non-RGB modes are indexed
425 * modes. Again, this allows drivers with invalid renderType to work
426 * properly.
427 */
428 renderType = GLX_COLOR_INDEX_TYPE;
429 }
430 #endif
431
432 return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
433 X_GLXCreateContext, renderType, vis->screen);
434 }
435
436 static void
437 glx_send_destroy_context(Display *dpy, XID xid)
438 {
439 CARD8 opcode = __glXSetupForCommand(dpy);
440 xGLXDestroyContextReq *req;
441
442 LockDisplay(dpy);
443 GetReq(GLXDestroyContext, req);
444 req->reqType = opcode;
445 req->glxCode = X_GLXDestroyContext;
446 req->context = xid;
447 UnlockDisplay(dpy);
448 SyncHandle();
449 }
450
451 /*
452 ** Destroy the named context
453 */
454
455 _X_EXPORT void
456 glXDestroyContext(Display * dpy, GLXContext ctx)
457 {
458 struct glx_context *gc = (struct glx_context *) ctx;
459
460 if (gc == NULL || gc->xid == None)
461 return;
462
463 __glXLock();
464 if (!gc->imported)
465 glx_send_destroy_context(dpy, gc->xid);
466
467 if (gc->currentDpy) {
468 /* This context is bound to some thread. According to the man page,
469 * we should not actually delete the context until it's unbound.
470 * Note that we set gc->xid = None above. In MakeContextCurrent()
471 * we check for that and delete the context there.
472 */
473 gc->xid = None;
474 } else {
475 gc->vtable->destroy(gc);
476 }
477 __glXUnlock();
478 }
479
480 /*
481 ** Return the major and minor version #s for the GLX extension
482 */
483 _X_EXPORT Bool
484 glXQueryVersion(Display * dpy, int *major, int *minor)
485 {
486 struct glx_display *priv;
487
488 /* Init the extension. This fetches the major and minor version. */
489 priv = __glXInitialize(dpy);
490 if (!priv)
491 return False;
492
493 if (major)
494 *major = priv->majorVersion;
495 if (minor)
496 *minor = priv->minorVersion;
497 return True;
498 }
499
500 /*
501 ** Query the existance of the GLX extension
502 */
503 _X_EXPORT Bool
504 glXQueryExtension(Display * dpy, int *errorBase, int *eventBase)
505 {
506 int major_op, erb, evb;
507 Bool rv;
508
509 rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
510 if (rv) {
511 if (errorBase)
512 *errorBase = erb;
513 if (eventBase)
514 *eventBase = evb;
515 }
516 return rv;
517 }
518
519 /*
520 ** Put a barrier in the token stream that forces the GL to finish its
521 ** work before X can proceed.
522 */
523 _X_EXPORT void
524 glXWaitGL(void)
525 {
526 struct glx_context *gc = __glXGetCurrentContext();
527
528 if (gc && gc->vtable->wait_gl)
529 gc->vtable->wait_gl(gc);
530 }
531
532 /*
533 ** Put a barrier in the token stream that forces X to finish its
534 ** work before GL can proceed.
535 */
536 _X_EXPORT void
537 glXWaitX(void)
538 {
539 struct glx_context *gc = __glXGetCurrentContext();
540
541 if (gc && gc->vtable->wait_x)
542 gc->vtable->wait_x(gc);
543 }
544
545 _X_EXPORT void
546 glXUseXFont(Font font, int first, int count, int listBase)
547 {
548 struct glx_context *gc = __glXGetCurrentContext();
549
550 if (gc && gc->vtable->use_x_font)
551 gc->vtable->use_x_font(gc, font, first, count, listBase);
552 }
553
554 /************************************************************************/
555
556 /*
557 ** Copy the source context to the destination context using the
558 ** attribute "mask".
559 */
560 _X_EXPORT void
561 glXCopyContext(Display * dpy, GLXContext source_user,
562 GLXContext dest_user, unsigned long mask)
563 {
564 struct glx_context *source = (struct glx_context *) source_user;
565 struct glx_context *dest = (struct glx_context *) dest_user;
566 #ifdef GLX_USE_APPLEGL
567 struct glx_context *gc = __glXGetCurrentContext();
568 int errorcode;
569 bool x11error;
570
571 if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext,
572 mask, &errorcode, &x11error)) {
573 __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error);
574 }
575
576 #else
577 xGLXCopyContextReq *req;
578 struct glx_context *gc = __glXGetCurrentContext();
579 GLXContextTag tag;
580 CARD8 opcode;
581
582 opcode = __glXSetupForCommand(dpy);
583 if (!opcode) {
584 return;
585 }
586
587 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
588 if (gc->isDirect) {
589 /* NOT_DONE: This does not work yet */
590 }
591 #endif
592
593 /*
594 ** If the source is the current context, send its tag so that the context
595 ** can be flushed before the copy.
596 */
597 if (source == gc && dpy == gc->currentDpy) {
598 tag = gc->currentContextTag;
599 }
600 else {
601 tag = 0;
602 }
603
604 /* Send the glXCopyContext request */
605 LockDisplay(dpy);
606 GetReq(GLXCopyContext, req);
607 req->reqType = opcode;
608 req->glxCode = X_GLXCopyContext;
609 req->source = source ? source->xid : None;
610 req->dest = dest ? dest->xid : None;
611 req->mask = mask;
612 req->contextTag = tag;
613 UnlockDisplay(dpy);
614 SyncHandle();
615 #endif /* GLX_USE_APPLEGL */
616 }
617
618
619 /**
620 * Determine if a context uses direct rendering.
621 *
622 * \param dpy Display where the context was created.
623 * \param contextID ID of the context to be tested.
624 *
625 * \returns \c True if the context is direct rendering or not.
626 */
627 static Bool
628 __glXIsDirect(Display * dpy, GLXContextID contextID)
629 {
630 CARD8 opcode;
631 xcb_connection_t *c;
632 xcb_generic_error_t *err;
633 xcb_glx_is_direct_reply_t *reply;
634 Bool is_direct;
635
636 opcode = __glXSetupForCommand(dpy);
637 if (!opcode) {
638 return False;
639 }
640
641 c = XGetXCBConnection(dpy);
642 reply = xcb_glx_is_direct_reply(c, xcb_glx_is_direct(c, contextID), &err);
643 is_direct = (reply != NULL && reply->is_direct) ? True : False;
644
645 if (err != NULL) {
646 __glXSendErrorForXcb(dpy, err);
647 free(err);
648 }
649
650 free(reply);
651
652 return is_direct;
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 _X_EXPORT 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);
676 #endif
677 }
678
679 _X_EXPORT 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 _X_EXPORT 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 _X_EXPORT void
820 glXSwapBuffers(Display * dpy, GLXDrawable drawable)
821 {
822 #ifdef GLX_USE_APPLEGL
823 struct glx_context * gc = __glXGetCurrentContext();
824 if(gc && 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 && 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 != NULL) && (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 _X_EXPORT 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->rgbMode = GL_TRUE;
927 config->doubleBufferMode = GLX_DONT_CARE;
928 config->renderType = GLX_RGBA_BIT;
929 }
930
931 config->drawableType = GLX_WINDOW_BIT;
932 config->visualRating = GLX_DONT_CARE;
933 config->transparentPixel = GLX_NONE;
934 config->transparentRed = GLX_DONT_CARE;
935 config->transparentGreen = GLX_DONT_CARE;
936 config->transparentBlue = GLX_DONT_CARE;
937 config->transparentAlpha = GLX_DONT_CARE;
938 config->transparentIndex = GLX_DONT_CARE;
939
940 config->xRenderable = GLX_DONT_CARE;
941 config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
942
943 config->swapMethod = 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
1019 /* There is a bug in a few of the XFree86 DDX drivers. They contain
1020 * visuals with a "transparent type" of 0 when they really mean GLX_NONE.
1021 * Technically speaking, it is a bug in the DDX driver, but there is
1022 * enough of an installed base to work around the problem here. In any
1023 * case, 0 is not a valid value of the transparent type, so we'll treat 0
1024 * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and
1025 * 0 from the server to be a match to maintain backward compatibility with
1026 * the (broken) drivers.
1027 */
1028
1029 if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) {
1030 if (a->transparentPixel == GLX_NONE) {
1031 if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0)
1032 return False;
1033 }
1034 else {
1035 MATCH_EXACT(transparentPixel);
1036 }
1037
1038 switch (a->transparentPixel) {
1039 case GLX_TRANSPARENT_RGB:
1040 MATCH_DONT_CARE(transparentRed);
1041 MATCH_DONT_CARE(transparentGreen);
1042 MATCH_DONT_CARE(transparentBlue);
1043 MATCH_DONT_CARE(transparentAlpha);
1044 break;
1045
1046 case GLX_TRANSPARENT_INDEX:
1047 MATCH_DONT_CARE(transparentIndex);
1048 break;
1049
1050 default:
1051 break;
1052 }
1053 }
1054
1055 return True;
1056 }
1057
1058
1059 /* There's some trickly language in the GLX spec about how this is supposed
1060 * to work. Basically, if a given component size is either not specified
1061 * or the requested size is zero, it is supposed to act like PERFER_SMALLER.
1062 * Well, that's really hard to do with the code as-is. This behavior is
1063 * closer to correct, but still not technically right.
1064 */
1065 #define PREFER_LARGER_OR_ZERO(comp) \
1066 do { \
1067 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1068 if ( ((*a)-> comp) == 0 ) { \
1069 return -1; \
1070 } \
1071 else if ( ((*b)-> comp) == 0 ) { \
1072 return 1; \
1073 } \
1074 else { \
1075 return ((*b)-> comp) - ((*a)-> comp) ; \
1076 } \
1077 } \
1078 } while( 0 )
1079
1080 #define PREFER_LARGER(comp) \
1081 do { \
1082 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1083 return ((*b)-> comp) - ((*a)-> comp) ; \
1084 } \
1085 } while( 0 )
1086
1087 #define PREFER_SMALLER(comp) \
1088 do { \
1089 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1090 return ((*a)-> comp) - ((*b)-> comp) ; \
1091 } \
1092 } while( 0 )
1093
1094 /**
1095 * Compare two GLXFBConfigs. This function is intended to be used as the
1096 * compare function passed in to qsort.
1097 *
1098 * \returns If \c a is a "better" config, according to the specification of
1099 * SGIX_fbconfig, a number less than zero is returned. If \c b is
1100 * better, then a number greater than zero is return. If both are
1101 * equal, zero is returned.
1102 * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1103 */
1104 static int
1105 fbconfig_compare(struct glx_config **a, struct glx_config **b)
1106 {
1107 /* The order of these comparisons must NOT change. It is defined by
1108 * the GLX 1.3 spec and ARB_multisample.
1109 */
1110
1111 PREFER_SMALLER(visualSelectGroup);
1112
1113 /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and
1114 * GLX_NON_CONFORMANT_CONFIG. It just so happens that this is the
1115 * numerical sort order of the enums (0x8000, 0x8001, and 0x800D).
1116 */
1117 PREFER_SMALLER(visualRating);
1118
1119 /* This isn't quite right. It is supposed to compare the sum of the
1120 * components the user specifically set minimums for.
1121 */
1122 PREFER_LARGER_OR_ZERO(redBits);
1123 PREFER_LARGER_OR_ZERO(greenBits);
1124 PREFER_LARGER_OR_ZERO(blueBits);
1125 PREFER_LARGER_OR_ZERO(alphaBits);
1126
1127 PREFER_SMALLER(rgbBits);
1128
1129 if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) {
1130 /* Prefer single-buffer.
1131 */
1132 return (!(*a)->doubleBufferMode) ? -1 : 1;
1133 }
1134
1135 PREFER_SMALLER(numAuxBuffers);
1136
1137 PREFER_LARGER_OR_ZERO(depthBits);
1138 PREFER_SMALLER(stencilBits);
1139
1140 /* This isn't quite right. It is supposed to compare the sum of the
1141 * components the user specifically set minimums for.
1142 */
1143 PREFER_LARGER_OR_ZERO(accumRedBits);
1144 PREFER_LARGER_OR_ZERO(accumGreenBits);
1145 PREFER_LARGER_OR_ZERO(accumBlueBits);
1146 PREFER_LARGER_OR_ZERO(accumAlphaBits);
1147
1148 PREFER_SMALLER(visualType);
1149
1150 /* None of the multisample specs say where this comparison should happen,
1151 * so I put it near the end.
1152 */
1153 PREFER_SMALLER(sampleBuffers);
1154 PREFER_SMALLER(samples);
1155
1156 /* None of the pbuffer or fbconfig specs say that this comparison needs
1157 * to happen at all, but it seems like it should.
1158 */
1159 PREFER_LARGER(maxPbufferWidth);
1160 PREFER_LARGER(maxPbufferHeight);
1161 PREFER_LARGER(maxPbufferPixels);
1162
1163 return 0;
1164 }
1165
1166
1167 /**
1168 * Selects and sorts a subset of the supplied configs based on the attributes.
1169 * This function forms to basis of \c glXChooseVisual, \c glXChooseFBConfig,
1170 * and \c glXChooseFBConfigSGIX.
1171 *
1172 * \param configs Array of pointers to possible configs. The elements of
1173 * this array that do not meet the criteria will be set to
1174 * NULL. The remaining elements will be sorted according to
1175 * the various visual / FBConfig selection rules.
1176 * \param num_configs Number of elements in the \c configs array.
1177 * \param attribList Attributes used select from \c configs. This array is
1178 * terminated by a \c None tag. The array can either take
1179 * the form expected by \c glXChooseVisual (where boolean
1180 * tags do not have a value) or by \c glXChooseFBConfig
1181 * (where every tag has a value).
1182 * \param fbconfig_style_tags Selects whether \c attribList is in
1183 * \c glXChooseVisual style or
1184 * \c glXChooseFBConfig style.
1185 * \returns The number of valid elements left in \c configs.
1186 *
1187 * \sa glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1188 */
1189 static int
1190 choose_visual(struct glx_config ** configs, int num_configs,
1191 const int *attribList, GLboolean fbconfig_style_tags)
1192 {
1193 struct glx_config test_config;
1194 int base;
1195 int i;
1196
1197 /* This is a fairly direct implementation of the selection method
1198 * described by GLX_SGIX_fbconfig. Start by culling out all the
1199 * configs that are not compatible with the selected parameter
1200 * list.
1201 */
1202
1203 init_fbconfig_for_chooser(&test_config, fbconfig_style_tags);
1204 __glXInitializeVisualConfigFromTags(&test_config, 512,
1205 (const INT32 *) attribList,
1206 GL_TRUE, fbconfig_style_tags);
1207
1208 base = 0;
1209 for (i = 0; i < num_configs; i++) {
1210 if (fbconfigs_compatible(&test_config, configs[i])) {
1211 configs[base] = configs[i];
1212 base++;
1213 }
1214 }
1215
1216 if (base == 0) {
1217 return 0;
1218 }
1219
1220 if (base < num_configs) {
1221 (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base));
1222 }
1223
1224 /* After the incompatible configs are removed, the resulting
1225 * list is sorted according to the rules set out in the various
1226 * specifications.
1227 */
1228
1229 qsort(configs, base, sizeof(struct glx_config *),
1230 (int (*)(const void *, const void *)) fbconfig_compare);
1231 return base;
1232 }
1233
1234
1235
1236
1237 /*
1238 ** Return the visual that best matches the template. Return None if no
1239 ** visual matches the template.
1240 */
1241 _X_EXPORT XVisualInfo *
1242 glXChooseVisual(Display * dpy, int screen, int *attribList)
1243 {
1244 XVisualInfo *visualList = NULL;
1245 struct glx_display *priv;
1246 struct glx_screen *psc;
1247 struct glx_config test_config;
1248 struct glx_config *config;
1249 struct glx_config *best_config = NULL;
1250
1251 /*
1252 ** Get a list of all visuals, return if list is empty
1253 */
1254 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1255 return None;
1256 }
1257
1258
1259 /*
1260 ** Build a template from the defaults and the attribute list
1261 ** Free visual list and return if an unexpected token is encountered
1262 */
1263 init_fbconfig_for_chooser(&test_config, GL_FALSE);
1264 __glXInitializeVisualConfigFromTags(&test_config, 512,
1265 (const INT32 *) attribList,
1266 GL_TRUE, GL_FALSE);
1267
1268 /*
1269 ** Eliminate visuals that don't meet minimum requirements
1270 ** Compute a score for those that do
1271 ** Remember which visual, if any, got the highest score
1272 ** If no visual is acceptable, return None
1273 ** Otherwise, create an XVisualInfo list with just the selected X visual
1274 ** and return this.
1275 */
1276 for (config = psc->visuals; config != NULL; config = config->next) {
1277 if (fbconfigs_compatible(&test_config, config)
1278 && ((best_config == NULL) ||
1279 (fbconfig_compare (&config, &best_config) < 0))) {
1280 XVisualInfo visualTemplate;
1281 XVisualInfo *newList;
1282 int i;
1283
1284 visualTemplate.screen = screen;
1285 visualTemplate.visualid = config->visualID;
1286 newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask,
1287 &visualTemplate, &i);
1288
1289 if (newList) {
1290 free(visualList);
1291 visualList = newList;
1292 best_config = config;
1293 }
1294 }
1295 }
1296
1297 #ifdef GLX_USE_APPLEGL
1298 if(visualList && getenv("LIBGL_DUMP_VISUALID")) {
1299 printf("visualid 0x%lx\n", visualList[0].visualid);
1300 }
1301 #endif
1302
1303 return visualList;
1304 }
1305
1306
1307 _X_EXPORT const char *
1308 glXQueryExtensionsString(Display * dpy, int screen)
1309 {
1310 struct glx_screen *psc;
1311 struct glx_display *priv;
1312
1313 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1314 return NULL;
1315 }
1316
1317 if (!psc->effectiveGLXexts) {
1318 if (!psc->serverGLXexts) {
1319 psc->serverGLXexts =
1320 __glXQueryServerString(dpy, priv->majorOpcode, screen,
1321 GLX_EXTENSIONS);
1322 }
1323
1324 __glXCalculateUsableExtensions(psc,
1325 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
1326 (psc->driScreen != NULL),
1327 #else
1328 GL_FALSE,
1329 #endif
1330 priv->minorVersion);
1331 }
1332
1333 return psc->effectiveGLXexts;
1334 }
1335
1336 _X_EXPORT const char *
1337 glXGetClientString(Display * dpy, int name)
1338 {
1339 (void) dpy;
1340
1341 switch (name) {
1342 case GLX_VENDOR:
1343 return (__glXGLXClientVendorName);
1344 case GLX_VERSION:
1345 return (__glXGLXClientVersion);
1346 case GLX_EXTENSIONS:
1347 return (__glXGetClientExtensions());
1348 default:
1349 return NULL;
1350 }
1351 }
1352
1353 _X_EXPORT const char *
1354 glXQueryServerString(Display * dpy, int screen, int name)
1355 {
1356 struct glx_screen *psc;
1357 struct glx_display *priv;
1358 const char **str;
1359
1360
1361 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1362 return NULL;
1363 }
1364
1365 switch (name) {
1366 case GLX_VENDOR:
1367 str = &priv->serverGLXvendor;
1368 break;
1369 case GLX_VERSION:
1370 str = &priv->serverGLXversion;
1371 break;
1372 case GLX_EXTENSIONS:
1373 str = &psc->serverGLXexts;
1374 break;
1375 default:
1376 return NULL;
1377 }
1378
1379 if (*str == NULL) {
1380 *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
1381 }
1382
1383 return *str;
1384 }
1385
1386 void
1387 __glXClientInfo(Display * dpy, int opcode)
1388 {
1389 char *ext_str = __glXGetClientGLExtensionString();
1390 int size = strlen(ext_str) + 1;
1391
1392 xcb_connection_t *c = XGetXCBConnection(dpy);
1393 xcb_glx_client_info(c,
1394 GLX_MAJOR_VERSION, GLX_MINOR_VERSION, size, ext_str);
1395
1396 free(ext_str);
1397 }
1398
1399
1400 /*
1401 ** EXT_import_context
1402 */
1403
1404 _X_EXPORT Display *
1405 glXGetCurrentDisplay(void)
1406 {
1407 struct glx_context *gc = __glXGetCurrentContext();
1408 if (NULL == gc)
1409 return NULL;
1410 return gc->currentDpy;
1411 }
1412
1413 _X_EXPORT
1414 GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (),
1415 glXGetCurrentDisplay)
1416
1417 #ifndef GLX_USE_APPLEGL
1418 _X_EXPORT GLXContext
1419 glXImportContextEXT(Display *dpy, GLXContextID contextID)
1420 {
1421 struct glx_display *priv = __glXInitialize(dpy);
1422 struct glx_screen *psc = NULL;
1423 xGLXQueryContextReply reply;
1424 CARD8 opcode;
1425 struct glx_context *ctx;
1426
1427 /* This GLX implementation knows about 5 different properties, so
1428 * allow the server to send us one of each.
1429 */
1430 int propList[5 * 2], *pProp, nPropListBytes;
1431 int numProps;
1432 int i, renderType;
1433 XID share;
1434 struct glx_config *mode;
1435 uint32_t fbconfigID = 0;
1436 uint32_t visualID = 0;
1437 uint32_t screen = 0;
1438 Bool got_screen = False;
1439
1440 if (priv == NULL)
1441 return NULL;
1442
1443 /* The GLX_EXT_import_context spec says:
1444 *
1445 * "If <contextID> does not refer to a valid context, then a BadContext
1446 * error is generated; if <contextID> refers to direct rendering
1447 * context then no error is generated but glXImportContextEXT returns
1448 * NULL."
1449 *
1450 * If contextID is None, generate BadContext on the client-side. Other
1451 * sorts of invalid contexts will be detected by the server in the
1452 * __glXIsDirect call.
1453 */
1454 if (contextID == None) {
1455 __glXSendError(dpy, GLXBadContext, contextID, X_GLXIsDirect, false);
1456 return NULL;
1457 }
1458
1459 if (__glXIsDirect(dpy, contextID))
1460 return NULL;
1461
1462 opcode = __glXSetupForCommand(dpy);
1463 if (!opcode)
1464 return 0;
1465
1466 /* Send the glXQueryContextInfoEXT request */
1467 LockDisplay(dpy);
1468
1469 if (priv->majorVersion > 1 || priv->minorVersion >= 3) {
1470 xGLXQueryContextReq *req;
1471
1472 GetReq(GLXQueryContext, req);
1473
1474 req->reqType = opcode;
1475 req->glxCode = X_GLXQueryContext;
1476 req->context = contextID;
1477 }
1478 else {
1479 xGLXVendorPrivateReq *vpreq;
1480 xGLXQueryContextInfoEXTReq *req;
1481
1482 GetReqExtra(GLXVendorPrivate,
1483 sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq,
1484 vpreq);
1485 req = (xGLXQueryContextInfoEXTReq *) vpreq;
1486 req->reqType = opcode;
1487 req->glxCode = X_GLXVendorPrivateWithReply;
1488 req->vendorCode = X_GLXvop_QueryContextInfoEXT;
1489 req->context = contextID;
1490 }
1491
1492 _XReply(dpy, (xReply *) & reply, 0, False);
1493
1494 if (reply.n <= __GLX_MAX_CONTEXT_PROPS)
1495 nPropListBytes = reply.n * 2 * sizeof propList[0];
1496 else
1497 nPropListBytes = 0;
1498 _XRead(dpy, (char *) propList, nPropListBytes);
1499 UnlockDisplay(dpy);
1500 SyncHandle();
1501
1502 numProps = nPropListBytes / (2 * sizeof(propList[0]));
1503 share = None;
1504 mode = NULL;
1505 renderType = GLX_RGBA_TYPE; /* By default, assume RGBA context */
1506 pProp = propList;
1507
1508 for (i = 0, pProp = propList; i < numProps; i++, pProp += 2)
1509 switch (pProp[0]) {
1510 case GLX_SCREEN:
1511 screen = pProp[1];
1512 got_screen = True;
1513 break;
1514 case GLX_SHARE_CONTEXT_EXT:
1515 share = pProp[1];
1516 break;
1517 case GLX_VISUAL_ID_EXT:
1518 visualID = pProp[1];
1519 break;
1520 case GLX_FBCONFIG_ID:
1521 fbconfigID = pProp[1];
1522 break;
1523 case GLX_RENDER_TYPE:
1524 renderType = pProp[1];
1525 break;
1526 }
1527
1528 if (!got_screen)
1529 return NULL;
1530
1531 psc = GetGLXScreenConfigs(dpy, screen);
1532 if (psc == NULL)
1533 return NULL;
1534
1535 if (fbconfigID != 0) {
1536 mode = glx_config_find_fbconfig(psc->configs, fbconfigID);
1537 } else if (visualID != 0) {
1538 mode = glx_config_find_visual(psc->visuals, visualID);
1539 }
1540
1541 if (mode == NULL)
1542 return NULL;
1543
1544 ctx = indirect_create_context(psc, mode, NULL, renderType);
1545 if (ctx == NULL)
1546 return NULL;
1547
1548 ctx->xid = contextID;
1549 ctx->imported = GL_TRUE;
1550 ctx->share_xid = share;
1551
1552 return (GLXContext) ctx;
1553 }
1554
1555 #endif
1556
1557 _X_EXPORT int
1558 glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value)
1559 {
1560 struct glx_context *ctx = (struct glx_context *) ctx_user;
1561
1562 switch (attribute) {
1563 case GLX_SHARE_CONTEXT_EXT:
1564 *value = ctx->share_xid;
1565 break;
1566 case GLX_VISUAL_ID_EXT:
1567 *value = ctx->config ? ctx->config->visualID : None;
1568 break;
1569 case GLX_SCREEN:
1570 *value = ctx->screen;
1571 break;
1572 case GLX_FBCONFIG_ID:
1573 *value = ctx->config ? ctx->config->fbconfigID : None;
1574 break;
1575 case GLX_RENDER_TYPE:
1576 *value = ctx->renderType;
1577 break;
1578 default:
1579 return GLX_BAD_ATTRIBUTE;
1580 }
1581 return Success;
1582 }
1583
1584 _X_EXPORT
1585 GLX_ALIAS(int, glXQueryContextInfoEXT,
1586 (Display * dpy, GLXContext ctx, int attribute, int *value),
1587 (dpy, ctx, attribute, value), glXQueryContext)
1588
1589 _X_EXPORT GLXContextID glXGetContextIDEXT(const GLXContext ctx_user)
1590 {
1591 struct glx_context *ctx = (struct glx_context *) ctx_user;
1592
1593 return (ctx == NULL) ? None : ctx->xid;
1594 }
1595
1596 _X_EXPORT void
1597 glXFreeContextEXT(Display *dpy, GLXContext ctx)
1598 {
1599 struct glx_context *gc = (struct glx_context *) ctx;
1600
1601 if (gc == NULL || gc->xid == None)
1602 return;
1603
1604 /* The GLX_EXT_import_context spec says:
1605 *
1606 * "glXFreeContext does not free the server-side context information or
1607 * the XID associated with the server-side context."
1608 *
1609 * Don't send any protocol. Just destroy the client-side tracking of the
1610 * context. Also, only release the context structure if it's not current.
1611 */
1612 __glXLock();
1613 if (gc->currentDpy) {
1614 gc->xid = None;
1615 } else {
1616 gc->vtable->destroy(gc);
1617 }
1618 __glXUnlock();
1619 }
1620
1621 _X_EXPORT GLXFBConfig *
1622 glXChooseFBConfig(Display * dpy, int screen,
1623 const int *attribList, int *nitems)
1624 {
1625 struct glx_config **config_list;
1626 int list_size;
1627
1628
1629 config_list = (struct glx_config **)
1630 glXGetFBConfigs(dpy, screen, &list_size);
1631
1632 if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) {
1633 list_size = choose_visual(config_list, list_size, attribList, GL_TRUE);
1634 if (list_size == 0) {
1635 free(config_list);
1636 config_list = NULL;
1637 }
1638 }
1639
1640 *nitems = list_size;
1641 return (GLXFBConfig *) config_list;
1642 }
1643
1644
1645 _X_EXPORT GLXContext
1646 glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig,
1647 int renderType, GLXContext shareList, Bool allowDirect)
1648 {
1649 struct glx_config *config = (struct glx_config *) fbconfig;
1650
1651 return CreateContext(dpy, config->fbconfigID, config, shareList,
1652 allowDirect, X_GLXCreateNewContext, renderType,
1653 config->screen);
1654 }
1655
1656
1657 _X_EXPORT GLXDrawable
1658 glXGetCurrentReadDrawable(void)
1659 {
1660 struct glx_context *gc = __glXGetCurrentContext();
1661
1662 return gc->currentReadable;
1663 }
1664
1665
1666 _X_EXPORT GLXFBConfig *
1667 glXGetFBConfigs(Display * dpy, int screen, int *nelements)
1668 {
1669 struct glx_display *priv = __glXInitialize(dpy);
1670 struct glx_config **config_list = NULL;
1671 struct glx_config *config;
1672 unsigned num_configs = 0;
1673 int i;
1674
1675 *nelements = 0;
1676 if (priv && (priv->screens != NULL)
1677 && (screen >= 0) && (screen <= ScreenCount(dpy))
1678 && (priv->screens[screen]->configs != NULL)
1679 && (priv->screens[screen]->configs->fbconfigID
1680 != (int) GLX_DONT_CARE)) {
1681
1682 for (config = priv->screens[screen]->configs; config != NULL;
1683 config = config->next) {
1684 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1685 num_configs++;
1686 }
1687 }
1688
1689 config_list = malloc(num_configs * sizeof *config_list);
1690 if (config_list != NULL) {
1691 *nelements = num_configs;
1692 i = 0;
1693 for (config = priv->screens[screen]->configs; config != NULL;
1694 config = config->next) {
1695 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1696 config_list[i] = config;
1697 i++;
1698 }
1699 }
1700 }
1701 }
1702
1703 return (GLXFBConfig *) config_list;
1704 }
1705
1706
1707 _X_EXPORT int
1708 glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig,
1709 int attribute, int *value)
1710 {
1711 struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig);
1712
1713 if (config == NULL)
1714 return GLXBadFBConfig;
1715
1716 return glx_config_get(config, attribute, value);
1717 }
1718
1719
1720 _X_EXPORT XVisualInfo *
1721 glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig)
1722 {
1723 XVisualInfo visualTemplate;
1724 struct glx_config *config = (struct glx_config *) fbconfig;
1725 int count;
1726
1727 /*
1728 ** Get a list of all visuals, return if list is empty
1729 */
1730 visualTemplate.visualid = config->visualID;
1731 return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count);
1732 }
1733
1734 #ifndef GLX_USE_APPLEGL
1735 /*
1736 ** GLX_SGI_swap_control
1737 */
1738 static int
1739 __glXSwapIntervalSGI(int interval)
1740 {
1741 xGLXVendorPrivateReq *req;
1742 struct glx_context *gc = __glXGetCurrentContext();
1743 struct glx_screen *psc;
1744 Display *dpy;
1745 CARD32 *interval_ptr;
1746 CARD8 opcode;
1747
1748 if (gc == NULL) {
1749 return GLX_BAD_CONTEXT;
1750 }
1751
1752 if (interval <= 0) {
1753 return GLX_BAD_VALUE;
1754 }
1755
1756 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1757
1758 #ifdef GLX_DIRECT_RENDERING
1759 if (gc->isDirect && psc && psc->driScreen &&
1760 psc->driScreen->setSwapInterval) {
1761 __GLXDRIdrawable *pdraw =
1762 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1763 psc->driScreen->setSwapInterval(pdraw, interval);
1764 return 0;
1765 }
1766 #endif
1767
1768 dpy = gc->currentDpy;
1769 opcode = __glXSetupForCommand(dpy);
1770 if (!opcode) {
1771 return 0;
1772 }
1773
1774 /* Send the glXSwapIntervalSGI request */
1775 LockDisplay(dpy);
1776 GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req);
1777 req->reqType = opcode;
1778 req->glxCode = X_GLXVendorPrivate;
1779 req->vendorCode = X_GLXvop_SwapIntervalSGI;
1780 req->contextTag = gc->currentContextTag;
1781
1782 interval_ptr = (CARD32 *) (req + 1);
1783 *interval_ptr = interval;
1784
1785 UnlockDisplay(dpy);
1786 SyncHandle();
1787 XFlush(dpy);
1788
1789 return 0;
1790 }
1791
1792
1793 /*
1794 ** GLX_MESA_swap_control
1795 */
1796 static int
1797 __glXSwapIntervalMESA(unsigned int interval)
1798 {
1799 #ifdef GLX_DIRECT_RENDERING
1800 struct glx_context *gc = __glXGetCurrentContext();
1801
1802 if (gc != NULL && gc->isDirect) {
1803 struct glx_screen *psc;
1804
1805 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1806 if (psc && psc->driScreen && psc->driScreen->setSwapInterval) {
1807 __GLXDRIdrawable *pdraw =
1808 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1809 return psc->driScreen->setSwapInterval(pdraw, interval);
1810 }
1811 }
1812 #endif
1813
1814 return GLX_BAD_CONTEXT;
1815 }
1816
1817
1818 static int
1819 __glXGetSwapIntervalMESA(void)
1820 {
1821 #ifdef GLX_DIRECT_RENDERING
1822 struct glx_context *gc = __glXGetCurrentContext();
1823
1824 if (gc != NULL && gc->isDirect) {
1825 struct glx_screen *psc;
1826
1827 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1828 if (psc && psc->driScreen && psc->driScreen->getSwapInterval) {
1829 __GLXDRIdrawable *pdraw =
1830 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1831 return psc->driScreen->getSwapInterval(pdraw);
1832 }
1833 }
1834 #endif
1835
1836 return 0;
1837 }
1838
1839
1840 /*
1841 ** GLX_SGI_video_sync
1842 */
1843 static int
1844 __glXGetVideoSyncSGI(unsigned int *count)
1845 {
1846 int64_t ust, msc, sbc;
1847 int ret;
1848 struct glx_context *gc = __glXGetCurrentContext();
1849 struct glx_screen *psc;
1850 #ifdef GLX_DIRECT_RENDERING
1851 __GLXDRIdrawable *pdraw;
1852 #endif
1853
1854 if (!gc)
1855 return GLX_BAD_CONTEXT;
1856
1857 #ifdef GLX_DIRECT_RENDERING
1858 if (!gc->isDirect)
1859 return GLX_BAD_CONTEXT;
1860 #endif
1861
1862 psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen);
1863 #ifdef GLX_DIRECT_RENDERING
1864 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1865 #endif
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 #ifdef GLX_DIRECT_RENDERING
1872 if (psc && psc->driScreen && psc->driScreen->getDrawableMSC) {
1873 ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc);
1874 *count = (unsigned) msc;
1875 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1876 }
1877 #endif
1878
1879 return GLX_BAD_CONTEXT;
1880 }
1881
1882 static int
1883 __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
1884 {
1885 struct glx_context *gc = __glXGetCurrentContext();
1886 struct glx_screen *psc;
1887 #ifdef GLX_DIRECT_RENDERING
1888 __GLXDRIdrawable *pdraw;
1889 #endif
1890 int64_t ust, msc, sbc;
1891 int ret;
1892
1893 if (divisor <= 0 || remainder < 0)
1894 return GLX_BAD_VALUE;
1895
1896 if (!gc)
1897 return GLX_BAD_CONTEXT;
1898
1899 #ifdef GLX_DIRECT_RENDERING
1900 if (!gc->isDirect)
1901 return GLX_BAD_CONTEXT;
1902 #endif
1903
1904 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1905 #ifdef GLX_DIRECT_RENDERING
1906 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1907 #endif
1908
1909 #ifdef GLX_DIRECT_RENDERING
1910 if (psc && psc->driScreen && psc->driScreen->waitForMSC) {
1911 ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc,
1912 &sbc);
1913 *count = (unsigned) msc;
1914 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1915 }
1916 #endif
1917
1918 return GLX_BAD_CONTEXT;
1919 }
1920
1921 #endif /* GLX_USE_APPLEGL */
1922
1923 /*
1924 ** GLX_SGIX_fbconfig
1925 ** Many of these functions are aliased to GLX 1.3 entry points in the
1926 ** GLX_functions table.
1927 */
1928
1929 _X_EXPORT
1930 GLX_ALIAS(int, glXGetFBConfigAttribSGIX,
1931 (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value),
1932 (dpy, config, attribute, value), glXGetFBConfigAttrib)
1933
1934 _X_EXPORT GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX,
1935 (Display * dpy, int screen, int *attrib_list,
1936 int *nelements), (dpy, screen, attrib_list, nelements),
1937 glXChooseFBConfig)
1938
1939 _X_EXPORT GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX,
1940 (Display * dpy, GLXFBConfigSGIX config),
1941 (dpy, config), glXGetVisualFromFBConfig)
1942
1943 _X_EXPORT GLXPixmap
1944 glXCreateGLXPixmapWithConfigSGIX(Display * dpy,
1945 GLXFBConfigSGIX fbconfig,
1946 Pixmap pixmap)
1947 {
1948 #ifndef GLX_USE_APPLEGL
1949 xGLXVendorPrivateWithReplyReq *vpreq;
1950 xGLXCreateGLXPixmapWithConfigSGIXReq *req;
1951 GLXPixmap xid = None;
1952 CARD8 opcode;
1953 struct glx_screen *psc;
1954 #endif
1955 struct glx_config *config = (struct glx_config *) fbconfig;
1956
1957
1958 if ((dpy == NULL) || (config == NULL)) {
1959 return None;
1960 }
1961 #ifdef GLX_USE_APPLEGL
1962 if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config))
1963 return None;
1964 return pixmap;
1965 #else
1966
1967 psc = GetGLXScreenConfigs(dpy, config->screen);
1968 if ((psc != NULL)
1969 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1970 opcode = __glXSetupForCommand(dpy);
1971 if (!opcode) {
1972 return None;
1973 }
1974
1975 /* Send the glXCreateGLXPixmapWithConfigSGIX request */
1976 LockDisplay(dpy);
1977 GetReqExtra(GLXVendorPrivateWithReply,
1978 sz_xGLXCreateGLXPixmapWithConfigSGIXReq -
1979 sz_xGLXVendorPrivateWithReplyReq, vpreq);
1980 req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq;
1981 req->reqType = opcode;
1982 req->glxCode = X_GLXVendorPrivateWithReply;
1983 req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX;
1984 req->screen = config->screen;
1985 req->fbconfig = config->fbconfigID;
1986 req->pixmap = pixmap;
1987 req->glxpixmap = xid = XAllocID(dpy);
1988 UnlockDisplay(dpy);
1989 SyncHandle();
1990 }
1991
1992 return xid;
1993 #endif
1994 }
1995
1996 _X_EXPORT GLXContext
1997 glXCreateContextWithConfigSGIX(Display * dpy,
1998 GLXFBConfigSGIX fbconfig, int renderType,
1999 GLXContext shareList, Bool allowDirect)
2000 {
2001 GLXContext gc = NULL;
2002 struct glx_config *config = (struct glx_config *) fbconfig;
2003 struct glx_screen *psc;
2004
2005
2006 if ((dpy == NULL) || (config == NULL)) {
2007 return None;
2008 }
2009
2010 psc = GetGLXScreenConfigs(dpy, config->screen);
2011 if ((psc != NULL)
2012 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
2013 gc = CreateContext(dpy, config->fbconfigID, config, shareList,
2014 allowDirect,
2015 X_GLXvop_CreateContextWithConfigSGIX, renderType,
2016 config->screen);
2017 }
2018
2019 return gc;
2020 }
2021
2022
2023 _X_EXPORT GLXFBConfigSGIX
2024 glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis)
2025 {
2026 struct glx_display *priv;
2027 struct glx_screen *psc = NULL;
2028
2029 if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success)
2030 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)
2031 && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) {
2032 return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs,
2033 vis->visualid);
2034 }
2035
2036 return NULL;
2037 }
2038
2039 #ifndef GLX_USE_APPLEGL
2040 /*
2041 ** GLX_SGIX_swap_group
2042 */
2043 static void
2044 __glXJoinSwapGroupSGIX(Display * dpy, GLXDrawable drawable,
2045 GLXDrawable member)
2046 {
2047 (void) dpy;
2048 (void) drawable;
2049 (void) member;
2050 }
2051
2052
2053 /*
2054 ** GLX_SGIX_swap_barrier
2055 */
2056 static void
2057 __glXBindSwapBarrierSGIX(Display * dpy, GLXDrawable drawable, int barrier)
2058 {
2059 (void) dpy;
2060 (void) drawable;
2061 (void) barrier;
2062 }
2063
2064 static Bool
2065 __glXQueryMaxSwapBarriersSGIX(Display * dpy, int screen, int *max)
2066 {
2067 (void) dpy;
2068 (void) screen;
2069 (void) max;
2070 return False;
2071 }
2072
2073
2074 /*
2075 ** GLX_OML_sync_control
2076 */
2077 static Bool
2078 __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable,
2079 int64_t * ust, int64_t * msc, int64_t * sbc)
2080 {
2081 struct glx_display * const priv = __glXInitialize(dpy);
2082 int ret;
2083 #ifdef GLX_DIRECT_RENDERING
2084 __GLXDRIdrawable *pdraw;
2085 #endif
2086 struct glx_screen *psc;
2087
2088 if (!priv)
2089 return False;
2090
2091 #ifdef GLX_DIRECT_RENDERING
2092 pdraw = GetGLXDRIDrawable(dpy, drawable);
2093 psc = pdraw ? pdraw->psc : NULL;
2094 if (pdraw && psc->driScreen->getDrawableMSC) {
2095 ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc);
2096 return ret;
2097 }
2098 #endif
2099
2100 return False;
2101 }
2102
2103 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2104 _X_HIDDEN GLboolean
2105 __glxGetMscRate(struct glx_screen *psc,
2106 int32_t * numerator, int32_t * denominator)
2107 {
2108 #ifdef XF86VIDMODE
2109 XF86VidModeModeLine mode_line;
2110 int dot_clock;
2111 int i;
2112
2113 if (XF86VidModeQueryVersion(psc->dpy, &i, &i) &&
2114 XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) {
2115 unsigned n = dot_clock * 1000;
2116 unsigned d = mode_line.vtotal * mode_line.htotal;
2117
2118 # define V_INTERLACE 0x010
2119 # define V_DBLSCAN 0x020
2120
2121 if (mode_line.flags & V_INTERLACE)
2122 n *= 2;
2123 else if (mode_line.flags & V_DBLSCAN)
2124 d *= 2;
2125
2126 /* The OML_sync_control spec requires that if the refresh rate is a
2127 * whole number, that the returned numerator be equal to the refresh
2128 * rate and the denominator be 1.
2129 */
2130
2131 if (n % d == 0) {
2132 n /= d;
2133 d = 1;
2134 }
2135 else {
2136 static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 };
2137
2138 /* This is a poor man's way to reduce a fraction. It's far from
2139 * perfect, but it will work well enough for this situation.
2140 */
2141
2142 for (i = 0; f[i] != 0; i++) {
2143 while (n % f[i] == 0 && d % f[i] == 0) {
2144 d /= f[i];
2145 n /= f[i];
2146 }
2147 }
2148 }
2149
2150 *numerator = n;
2151 *denominator = d;
2152
2153 return True;
2154 }
2155 else
2156 #endif
2157
2158 return False;
2159 }
2160 #endif
2161
2162 /**
2163 * Determine the refresh rate of the specified drawable and display.
2164 *
2165 * \param dpy Display whose refresh rate is to be determined.
2166 * \param drawable Drawable whose refresh rate is to be determined.
2167 * \param numerator Numerator of the refresh rate.
2168 * \param demoninator Denominator of the refresh rate.
2169 * \return If the refresh rate for the specified display and drawable could
2170 * be calculated, True is returned. Otherwise False is returned.
2171 *
2172 * \note This function is implemented entirely client-side. A lot of other
2173 * functionality is required to export GLX_OML_sync_control, so on
2174 * XFree86 this function can be called for direct-rendering contexts
2175 * when GLX_OML_sync_control appears in the client extension string.
2176 */
2177
2178 _X_HIDDEN GLboolean
2179 __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
2180 int32_t * numerator, int32_t * denominator)
2181 {
2182 #if defined( GLX_DIRECT_RENDERING ) && defined( XF86VIDMODE )
2183 __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable);
2184
2185 if (draw == NULL)
2186 return False;
2187
2188 return __glxGetMscRate(draw->psc, numerator, denominator);
2189 #else
2190 (void) dpy;
2191 (void) drawable;
2192 (void) numerator;
2193 (void) denominator;
2194 #endif
2195 return False;
2196 }
2197
2198
2199 static int64_t
2200 __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable,
2201 int64_t target_msc, int64_t divisor, int64_t remainder)
2202 {
2203 struct glx_context *gc = __glXGetCurrentContext();
2204 #ifdef GLX_DIRECT_RENDERING
2205 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2206 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2207 #endif
2208
2209 if (!gc) /* no GLX for this */
2210 return -1;
2211
2212 #ifdef GLX_DIRECT_RENDERING
2213 if (!pdraw || !gc->isDirect)
2214 return -1;
2215 #endif
2216
2217 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2218 * error", but it also says "It [glXSwapBuffersMscOML] will return a value
2219 * of -1 if the function failed because of errors detected in the input
2220 * parameters"
2221 */
2222 if (divisor < 0 || remainder < 0 || target_msc < 0)
2223 return -1;
2224 if (divisor > 0 && remainder >= divisor)
2225 return -1;
2226
2227 if (target_msc == 0 && divisor == 0 && remainder == 0)
2228 remainder = 1;
2229
2230 #ifdef GLX_DIRECT_RENDERING
2231 if (psc->driScreen && psc->driScreen->swapBuffers)
2232 return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor,
2233 remainder, False);
2234 #endif
2235
2236 return -1;
2237 }
2238
2239
2240 static Bool
2241 __glXWaitForMscOML(Display * dpy, GLXDrawable drawable,
2242 int64_t target_msc, int64_t divisor,
2243 int64_t remainder, int64_t * ust,
2244 int64_t * msc, int64_t * sbc)
2245 {
2246 #ifdef GLX_DIRECT_RENDERING
2247 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2248 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2249 int ret;
2250 #endif
2251
2252
2253 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2254 * error", but the return type in the spec is Bool.
2255 */
2256 if (divisor < 0 || remainder < 0 || target_msc < 0)
2257 return False;
2258 if (divisor > 0 && remainder >= divisor)
2259 return False;
2260
2261 #ifdef GLX_DIRECT_RENDERING
2262 if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) {
2263 ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder,
2264 ust, msc, sbc);
2265 return ret;
2266 }
2267 #endif
2268
2269 return False;
2270 }
2271
2272
2273 static Bool
2274 __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable,
2275 int64_t target_sbc, int64_t * ust,
2276 int64_t * msc, int64_t * sbc)
2277 {
2278 #ifdef GLX_DIRECT_RENDERING
2279 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2280 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2281 int ret;
2282 #endif
2283
2284 /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE
2285 * error", but the return type in the spec is Bool.
2286 */
2287 if (target_sbc < 0)
2288 return False;
2289
2290 #ifdef GLX_DIRECT_RENDERING
2291 if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) {
2292 ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc);
2293 return ret;
2294 }
2295 #endif
2296
2297 return False;
2298 }
2299
2300 /*@}*/
2301
2302
2303 /**
2304 * Mesa extension stubs. These will help reduce portability problems.
2305 */
2306 /*@{*/
2307
2308 /**
2309 * Release all buffers associated with the specified GLX drawable.
2310 *
2311 * \todo
2312 * This function was intended for stand-alone Mesa. The issue there is that
2313 * the library doesn't get any notification when a window is closed. In
2314 * DRI there is a similar but slightly different issue. When GLX 1.3 is
2315 * supported, there are 3 different functions to destroy a drawable. It
2316 * should be possible to create GLX protocol (or have it determine which
2317 * protocol to use based on the type of the drawable) to have one function
2318 * do the work of 3. For the direct-rendering case, this function could
2319 * just call the driver's \c __DRIdrawableRec::destroyDrawable function.
2320 * This would reduce the frequency with which \c __driGarbageCollectDrawables
2321 * would need to be used. This really should be done as part of the new DRI
2322 * interface work.
2323 *
2324 * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt
2325 * __driGarbageCollectDrawables
2326 * glXDestroyGLXPixmap
2327 * glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow
2328 * glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX
2329 */
2330 static Bool
2331 __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d)
2332 {
2333 (void) dpy;
2334 (void) d;
2335 return False;
2336 }
2337
2338
2339 _X_EXPORT GLXPixmap
2340 glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual,
2341 Pixmap pixmap, Colormap cmap)
2342 {
2343 (void) dpy;
2344 (void) visual;
2345 (void) pixmap;
2346 (void) cmap;
2347 return 0;
2348 }
2349
2350 /*@}*/
2351
2352
2353 /**
2354 * GLX_MESA_copy_sub_buffer
2355 */
2356 #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */
2357 static void
2358 __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable,
2359 int x, int y, int width, int height)
2360 {
2361 xGLXVendorPrivateReq *req;
2362 struct glx_context *gc;
2363 GLXContextTag tag;
2364 CARD32 *drawable_ptr;
2365 INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr;
2366 CARD8 opcode;
2367
2368 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2369 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2370 if (pdraw != NULL) {
2371 struct glx_screen *psc = pdraw->psc;
2372 if (psc->driScreen->copySubBuffer != NULL) {
2373 (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height, True);
2374 }
2375
2376 return;
2377 }
2378 #endif
2379
2380 opcode = __glXSetupForCommand(dpy);
2381 if (!opcode)
2382 return;
2383
2384 /*
2385 ** The calling thread may or may not have a current context. If it
2386 ** does, send the context tag so the server can do a flush.
2387 */
2388 gc = __glXGetCurrentContext();
2389 if ((gc != NULL) && (dpy == gc->currentDpy) &&
2390 ((drawable == gc->currentDrawable) ||
2391 (drawable == gc->currentReadable))) {
2392 tag = gc->currentContextTag;
2393 }
2394 else {
2395 tag = 0;
2396 }
2397
2398 LockDisplay(dpy);
2399 GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req);
2400 req->reqType = opcode;
2401 req->glxCode = X_GLXVendorPrivate;
2402 req->vendorCode = X_GLXvop_CopySubBufferMESA;
2403 req->contextTag = tag;
2404
2405 drawable_ptr = (CARD32 *) (req + 1);
2406 x_ptr = (INT32 *) (drawable_ptr + 1);
2407 y_ptr = (INT32 *) (drawable_ptr + 2);
2408 w_ptr = (INT32 *) (drawable_ptr + 3);
2409 h_ptr = (INT32 *) (drawable_ptr + 4);
2410
2411 *drawable_ptr = drawable;
2412 *x_ptr = x;
2413 *y_ptr = y;
2414 *w_ptr = width;
2415 *h_ptr = height;
2416
2417 UnlockDisplay(dpy);
2418 SyncHandle();
2419 }
2420
2421 /*@{*/
2422 static void
2423 __glXBindTexImageEXT(Display * dpy,
2424 GLXDrawable drawable, int buffer, const int *attrib_list)
2425 {
2426 struct glx_context *gc = __glXGetCurrentContext();
2427
2428 if (gc == NULL || gc->vtable->bind_tex_image == NULL)
2429 return;
2430
2431 gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list);
2432 }
2433
2434 static void
2435 __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer)
2436 {
2437 struct glx_context *gc = __glXGetCurrentContext();
2438
2439 if (gc == NULL || gc->vtable->release_tex_image == NULL)
2440 return;
2441
2442 gc->vtable->release_tex_image(dpy, drawable, buffer);
2443 }
2444
2445 /*@}*/
2446
2447 #endif /* GLX_USE_APPLEGL */
2448
2449 /**
2450 * \c strdup is actually not a standard ANSI C or POSIX routine.
2451 * Irix will not define it if ANSI mode is in effect.
2452 *
2453 * \sa strdup
2454 */
2455 _X_HIDDEN char *
2456 __glXstrdup(const char *str)
2457 {
2458 char *copy;
2459 copy = malloc(strlen(str) + 1);
2460 if (!copy)
2461 return NULL;
2462 strcpy(copy, str);
2463 return copy;
2464 }
2465
2466 /*
2467 ** glXGetProcAddress support
2468 */
2469
2470 struct name_address_pair
2471 {
2472 const char *Name;
2473 GLvoid *Address;
2474 };
2475
2476 #define GLX_FUNCTION(f) { # f, (GLvoid *) f }
2477 #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f }
2478
2479 static const struct name_address_pair GLX_functions[] = {
2480 /*** GLX_VERSION_1_0 ***/
2481 GLX_FUNCTION(glXChooseVisual),
2482 GLX_FUNCTION(glXCopyContext),
2483 GLX_FUNCTION(glXCreateContext),
2484 GLX_FUNCTION(glXCreateGLXPixmap),
2485 GLX_FUNCTION(glXDestroyContext),
2486 GLX_FUNCTION(glXDestroyGLXPixmap),
2487 GLX_FUNCTION(glXGetConfig),
2488 GLX_FUNCTION(glXGetCurrentContext),
2489 GLX_FUNCTION(glXGetCurrentDrawable),
2490 GLX_FUNCTION(glXIsDirect),
2491 GLX_FUNCTION(glXMakeCurrent),
2492 GLX_FUNCTION(glXQueryExtension),
2493 GLX_FUNCTION(glXQueryVersion),
2494 GLX_FUNCTION(glXSwapBuffers),
2495 GLX_FUNCTION(glXUseXFont),
2496 GLX_FUNCTION(glXWaitGL),
2497 GLX_FUNCTION(glXWaitX),
2498
2499 /*** GLX_VERSION_1_1 ***/
2500 GLX_FUNCTION(glXGetClientString),
2501 GLX_FUNCTION(glXQueryExtensionsString),
2502 GLX_FUNCTION(glXQueryServerString),
2503
2504 /*** GLX_VERSION_1_2 ***/
2505 GLX_FUNCTION(glXGetCurrentDisplay),
2506
2507 /*** GLX_VERSION_1_3 ***/
2508 GLX_FUNCTION(glXChooseFBConfig),
2509 GLX_FUNCTION(glXCreateNewContext),
2510 GLX_FUNCTION(glXCreatePbuffer),
2511 GLX_FUNCTION(glXCreatePixmap),
2512 GLX_FUNCTION(glXCreateWindow),
2513 GLX_FUNCTION(glXDestroyPbuffer),
2514 GLX_FUNCTION(glXDestroyPixmap),
2515 GLX_FUNCTION(glXDestroyWindow),
2516 GLX_FUNCTION(glXGetCurrentReadDrawable),
2517 GLX_FUNCTION(glXGetFBConfigAttrib),
2518 GLX_FUNCTION(glXGetFBConfigs),
2519 GLX_FUNCTION(glXGetSelectedEvent),
2520 GLX_FUNCTION(glXGetVisualFromFBConfig),
2521 GLX_FUNCTION(glXMakeContextCurrent),
2522 GLX_FUNCTION(glXQueryContext),
2523 GLX_FUNCTION(glXQueryDrawable),
2524 GLX_FUNCTION(glXSelectEvent),
2525
2526 #ifndef GLX_USE_APPLEGL
2527 /*** GLX_SGI_swap_control ***/
2528 GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI),
2529
2530 /*** GLX_SGI_video_sync ***/
2531 GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI),
2532 GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI),
2533
2534 /*** GLX_SGI_make_current_read ***/
2535 GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent),
2536 GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable),
2537
2538 /*** GLX_EXT_import_context ***/
2539 GLX_FUNCTION(glXFreeContextEXT),
2540 GLX_FUNCTION(glXGetContextIDEXT),
2541 GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay),
2542 GLX_FUNCTION(glXImportContextEXT),
2543 GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext),
2544 #endif
2545
2546 /*** GLX_SGIX_fbconfig ***/
2547 GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib),
2548 GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig),
2549 GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX),
2550 GLX_FUNCTION(glXCreateContextWithConfigSGIX),
2551 GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig),
2552 GLX_FUNCTION(glXGetFBConfigFromVisualSGIX),
2553
2554 #ifndef GLX_USE_APPLEGL
2555 /*** GLX_SGIX_pbuffer ***/
2556 GLX_FUNCTION(glXCreateGLXPbufferSGIX),
2557 GLX_FUNCTION(glXDestroyGLXPbufferSGIX),
2558 GLX_FUNCTION(glXQueryGLXPbufferSGIX),
2559 GLX_FUNCTION(glXSelectEventSGIX),
2560 GLX_FUNCTION(glXGetSelectedEventSGIX),
2561
2562 /*** GLX_SGIX_swap_group ***/
2563 GLX_FUNCTION2(glXJoinSwapGroupSGIX, __glXJoinSwapGroupSGIX),
2564
2565 /*** GLX_SGIX_swap_barrier ***/
2566 GLX_FUNCTION2(glXBindSwapBarrierSGIX, __glXBindSwapBarrierSGIX),
2567 GLX_FUNCTION2(glXQueryMaxSwapBarriersSGIX, __glXQueryMaxSwapBarriersSGIX),
2568
2569 /*** GLX_MESA_copy_sub_buffer ***/
2570 GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA),
2571
2572 /*** GLX_MESA_pixmap_colormap ***/
2573 GLX_FUNCTION(glXCreateGLXPixmapMESA),
2574
2575 /*** GLX_MESA_release_buffers ***/
2576 GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA),
2577
2578 /*** GLX_MESA_swap_control ***/
2579 GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA),
2580 GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA),
2581 #endif
2582
2583 /*** GLX_ARB_get_proc_address ***/
2584 GLX_FUNCTION(glXGetProcAddressARB),
2585
2586 /*** GLX 1.4 ***/
2587 GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB),
2588
2589 #ifndef GLX_USE_APPLEGL
2590 /*** GLX_OML_sync_control ***/
2591 GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML),
2592 GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML),
2593 GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML),
2594 GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML),
2595 GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML),
2596
2597 /*** GLX_EXT_texture_from_pixmap ***/
2598 GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT),
2599 GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT),
2600 #endif
2601
2602 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2603 /*** DRI configuration ***/
2604 GLX_FUNCTION(glXGetScreenDriver),
2605 GLX_FUNCTION(glXGetDriverConfig),
2606 #endif
2607
2608 /*** GLX_ARB_create_context and GLX_ARB_create_context_profile ***/
2609 GLX_FUNCTION(glXCreateContextAttribsARB),
2610
2611 /*** GLX_MESA_query_renderer ***/
2612 GLX_FUNCTION(glXQueryRendererIntegerMESA),
2613 GLX_FUNCTION(glXQueryRendererStringMESA),
2614 GLX_FUNCTION(glXQueryCurrentRendererIntegerMESA),
2615 GLX_FUNCTION(glXQueryCurrentRendererStringMESA),
2616
2617 {NULL, NULL} /* end of list */
2618 };
2619
2620 static const GLvoid *
2621 get_glx_proc_address(const char *funcName)
2622 {
2623 GLuint i;
2624
2625 /* try static functions */
2626 for (i = 0; GLX_functions[i].Name; i++) {
2627 if (strcmp(GLX_functions[i].Name, funcName) == 0)
2628 return GLX_functions[i].Address;
2629 }
2630
2631 return NULL;
2632 }
2633
2634 /**
2635 * Get the address of a named GL function. This is the pre-GLX 1.4 name for
2636 * \c glXGetProcAddress.
2637 *
2638 * \param procName Name of a GL or GLX function.
2639 * \returns A pointer to the named function
2640 *
2641 * \sa glXGetProcAddress
2642 */
2643 _X_EXPORT void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
2644 {
2645 typedef void (*gl_function) (void);
2646 gl_function f;
2647
2648
2649 /* Search the table of GLX and internal functions first. If that
2650 * fails and the supplied name could be a valid core GL name, try
2651 * searching the core GL function table. This check is done to prevent
2652 * DRI based drivers from searching the core GL function table for
2653 * internal API functions.
2654 */
2655 f = (gl_function) get_glx_proc_address((const char *) procName);
2656 if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l')
2657 && (procName[2] != 'X')) {
2658 #ifdef GLX_SHARED_GLAPI
2659 f = (gl_function) __indirect_get_proc_address((const char *) procName);
2660 #endif
2661 if (!f)
2662 f = (gl_function) _glapi_get_proc_address((const char *) procName);
2663 if (!f) {
2664 struct glx_context *gc = __glXGetCurrentContext();
2665
2666 if (gc != NULL && gc->vtable->get_proc_address != NULL)
2667 f = gc->vtable->get_proc_address((const char *) procName);
2668 }
2669 }
2670 return f;
2671 }
2672
2673 /**
2674 * Get the address of a named GL function. This is the GLX 1.4 name for
2675 * \c glXGetProcAddressARB.
2676 *
2677 * \param procName Name of a GL or GLX function.
2678 * \returns A pointer to the named function
2679 *
2680 * \sa glXGetProcAddressARB
2681 */
2682 _X_EXPORT void (*glXGetProcAddress(const GLubyte * procName)) (void)
2683 #if defined(__GNUC__) && !defined(GLX_ALIAS_UNSUPPORTED)
2684 __attribute__ ((alias("glXGetProcAddressARB")));
2685 #else
2686 {
2687 return glXGetProcAddressARB(procName);
2688 }
2689 #endif /* __GNUC__ */
2690
2691
2692 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2693 /**
2694 * Get the unadjusted system time (UST). Currently, the UST is measured in
2695 * microseconds since Epoc. The actual resolution of the UST may vary from
2696 * system to system, and the units may vary from release to release.
2697 * Drivers should not call this function directly. They should instead use
2698 * \c glXGetProcAddress to obtain a pointer to the function.
2699 *
2700 * \param ust Location to store the 64-bit UST
2701 * \returns Zero on success or a negative errno value on failure.
2702 *
2703 * \sa glXGetProcAddress, PFNGLXGETUSTPROC
2704 *
2705 * \since Internal API version 20030317.
2706 */
2707 _X_HIDDEN int
2708 __glXGetUST(int64_t * ust)
2709 {
2710 struct timeval tv;
2711
2712 if (ust == NULL) {
2713 return -EFAULT;
2714 }
2715
2716 if (gettimeofday(&tv, NULL) == 0) {
2717 ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
2718 return 0;
2719 }
2720 else {
2721 return -errno;
2722 }
2723 }
2724 #endif /* GLX_DIRECT_RENDERING */