2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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:
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.
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
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.
33 * Client-side GLX interface.
36 #include "glxclient.h"
38 #include "glxextensions.h"
41 #ifdef GLX_DIRECT_RENDERING
42 #ifdef GLX_USE_APPLEGL
43 #include "apple_glx_context.h"
44 #include "apple_glx.h"
45 #include "glx_error.h"
49 #include <X11/extensions/xf86vmode.h>
57 #include <X11/Xlib-xcb.h>
62 static const char __glXGLXClientVendorName[] = "Mesa Project and SGI";
63 static const char __glXGLXClientVersion[] = "1.4";
65 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
68 * Get the __DRIdrawable for the drawable associated with a GLXContext
70 * \param dpy The display associated with \c drawable.
71 * \param drawable GLXDrawable whose __DRIdrawable part is to be retrieved.
72 * \param scrn_num If non-NULL, the drawables screen is stored there
73 * \returns A pointer to the context's __DRIdrawable on success, or NULL if
74 * the drawable is not associated with a direct-rendering context.
76 _X_HIDDEN __GLXDRIdrawable *
77 GetGLXDRIDrawable(Display * dpy, GLXDrawable drawable)
79 struct glx_display *priv = __glXInitialize(dpy);
80 __GLXDRIdrawable *pdraw;
85 if (__glxHashLookup(priv->drawHash, drawable, (void *) &pdraw) == 0)
93 _X_HIDDEN struct glx_drawable *
94 GetGLXDrawable(Display *dpy, GLXDrawable drawable)
96 struct glx_display *priv = __glXInitialize(dpy);
97 struct glx_drawable *glxDraw;
102 if (__glxHashLookup(priv->glXDrawHash, drawable, (void *) &glxDraw) == 0)
109 InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw, XID xDrawable,
110 GLXDrawable drawable)
112 struct glx_display *priv = __glXInitialize(dpy);
117 glxDraw->xDrawable = xDrawable;
118 glxDraw->drawable = drawable;
119 glxDraw->lastEventSbc = 0;
120 glxDraw->eventSbcWrap = 0;
122 return __glxHashInsert(priv->glXDrawHash, drawable, glxDraw);
126 DestroyGLXDrawable(Display *dpy, GLXDrawable drawable)
128 struct glx_display *priv = __glXInitialize(dpy);
129 struct glx_drawable *glxDraw;
134 glxDraw = GetGLXDrawable(dpy, drawable);
135 __glxHashDelete(priv->glXDrawHash, drawable);
140 * Get the GLX per-screen data structure associated with a GLX context.
142 * \param dpy Display for which the GLX per-screen information is to be
144 * \param scrn Screen on \c dpy for which the GLX per-screen information is
146 * \returns A pointer to the GLX per-screen data if \c dpy and \c scrn
147 * specify a valid GLX screen, or NULL otherwise.
149 * \todo Should this function validate that \c scrn is within the screen
150 * number range for \c dpy?
153 static struct glx_screen *
154 GetGLXScreenConfigs(Display * dpy, int scrn)
156 struct glx_display *const priv = __glXInitialize(dpy);
160 NULL) ? priv->screens[scrn] : NULL;
165 GetGLXPrivScreenConfig(Display * dpy, int scrn, struct glx_display ** ppriv,
166 struct glx_screen ** ppsc)
168 /* Initialize the extension, if needed . This has the added value
169 * of initializing/allocating the display private
173 return GLX_NO_EXTENSION;
176 *ppriv = __glXInitialize(dpy);
177 if (*ppriv == NULL) {
178 return GLX_NO_EXTENSION;
181 /* Check screen number to see if its valid */
182 if ((scrn < 0) || (scrn >= ScreenCount(dpy))) {
183 return GLX_BAD_SCREEN;
186 /* Check to see if the GL is supported on this screen */
187 *ppsc = (*ppriv)->screens[scrn];
188 if ((*ppsc)->configs == NULL) {
189 /* No support for GL on this screen regardless of visual */
190 return GLX_BAD_VISUAL;
198 * Determine if a \c GLXFBConfig supplied by the application is valid.
200 * \param dpy Application supplied \c Display pointer.
201 * \param config Application supplied \c GLXFBConfig.
203 * \returns If the \c GLXFBConfig is valid, the a pointer to the matching
204 * \c struct glx_config structure is returned. Otherwise, \c NULL
207 static struct glx_config *
208 ValidateGLXFBConfig(Display * dpy, GLXFBConfig fbconfig)
210 struct glx_display *const priv = __glXInitialize(dpy);
211 int num_screens = ScreenCount(dpy);
213 struct glx_config *config;
216 for (i = 0; i < num_screens; i++) {
217 for (config = priv->screens[i]->configs; config != NULL;
218 config = config->next) {
219 if (config == (struct glx_config *) fbconfig) {
230 glx_context_init(struct glx_context *gc,
231 struct glx_screen *psc, struct glx_config *config)
233 gc->majorOpcode = __glXSetupForCommand(psc->display->dpy);
234 if (!gc->majorOpcode)
237 gc->screen = psc->scr;
240 gc->isDirect = GL_TRUE;
241 gc->currentContextTag = -1;
248 * Create a new context.
250 * \param renderType For FBConfigs, what is the rendering type?
254 CreateContext(Display *dpy, int generic_id, struct glx_config *config,
255 GLXContext shareList_user, Bool allowDirect,
256 unsigned code, int renderType, int screen)
258 struct glx_context *gc;
259 struct glx_screen *psc;
260 struct glx_context *shareList = (struct glx_context *) shareList_user;
264 psc = GetGLXScreenConfigs(dpy, screen);
268 if (generic_id == None)
272 #ifdef GLX_USE_APPLEGL
273 gc = applegl_create_context(psc, config, shareList, renderType);
275 if (allowDirect && psc->vtable->create_context)
276 gc = psc->vtable->create_context(psc, config, shareList, renderType);
278 gc = indirect_create_context(psc, config, shareList, renderType);
285 case X_GLXCreateContext: {
286 xGLXCreateContextReq *req;
288 /* Send the glXCreateContext request */
289 GetReq(GLXCreateContext, req);
290 req->reqType = gc->majorOpcode;
291 req->glxCode = X_GLXCreateContext;
292 req->context = gc->xid = XAllocID(dpy);
293 req->visual = generic_id;
294 req->screen = screen;
295 req->shareList = shareList ? shareList->xid : None;
296 req->isDirect = gc->isDirect;
300 case X_GLXCreateNewContext: {
301 xGLXCreateNewContextReq *req;
303 /* Send the glXCreateNewContext request */
304 GetReq(GLXCreateNewContext, req);
305 req->reqType = gc->majorOpcode;
306 req->glxCode = X_GLXCreateNewContext;
307 req->context = gc->xid = XAllocID(dpy);
308 req->fbconfig = generic_id;
309 req->screen = screen;
310 req->renderType = renderType;
311 req->shareList = shareList ? shareList->xid : None;
312 req->isDirect = gc->isDirect;
316 case X_GLXvop_CreateContextWithConfigSGIX: {
317 xGLXVendorPrivateWithReplyReq *vpreq;
318 xGLXCreateContextWithConfigSGIXReq *req;
320 /* Send the glXCreateNewContext request */
321 GetReqExtra(GLXVendorPrivateWithReply,
322 sz_xGLXCreateContextWithConfigSGIXReq -
323 sz_xGLXVendorPrivateWithReplyReq, vpreq);
324 req = (xGLXCreateContextWithConfigSGIXReq *) vpreq;
325 req->reqType = gc->majorOpcode;
326 req->glxCode = X_GLXVendorPrivateWithReply;
327 req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX;
328 req->context = gc->xid = XAllocID(dpy);
329 req->fbconfig = generic_id;
330 req->screen = screen;
331 req->renderType = renderType;
332 req->shareList = shareList ? shareList->xid : None;
333 req->isDirect = gc->isDirect;
338 /* What to do here? This case is the sign of an internal error. It
339 * should never be reachable.
347 gc->imported = GL_FALSE;
348 gc->renderType = renderType;
350 return (GLXContext) gc;
354 glXCreateContext(Display * dpy, XVisualInfo * vis,
355 GLXContext shareList, Bool allowDirect)
357 struct glx_config *config = NULL;
360 #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL)
361 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen);
363 config = glx_config_find_visual(psc->visuals, vis->visualid);
364 if (config == NULL) {
367 error.errorCode = BadValue;
368 error.resourceID = vis->visualid;
369 error.sequenceNumber = dpy->request;
370 error.type = X_Error;
371 error.majorCode = __glXSetupForCommand(dpy);
372 error.minorCode = X_GLXCreateContext;
373 _XError(dpy, &error);
377 renderType = config->rgbMode ? GLX_RGBA_TYPE : GLX_COLOR_INDEX_TYPE;
380 return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
381 X_GLXCreateContext, renderType, vis->screen);
385 glx_send_destroy_context(Display *dpy, XID xid)
387 CARD8 opcode = __glXSetupForCommand(dpy);
388 xGLXDestroyContextReq *req;
391 GetReq(GLXDestroyContext, req);
392 req->reqType = opcode;
393 req->glxCode = X_GLXDestroyContext;
400 ** Destroy the named context
404 glXDestroyContext(Display * dpy, GLXContext ctx)
406 struct glx_context *gc = (struct glx_context *) ctx;
412 if (gc->currentDpy) {
413 /* This context is bound to some thread. According to the man page,
414 * we should not actually delete the context until it's unbound.
415 * Note that we set gc->xid = None above. In MakeContextCurrent()
416 * we check for that and delete the context there.
419 glx_send_destroy_context(dpy, gc->xid);
426 gc->vtable->destroy(gc);
430 ** Return the major and minor version #s for the GLX extension
433 glXQueryVersion(Display * dpy, int *major, int *minor)
435 struct glx_display *priv;
437 /* Init the extension. This fetches the major and minor version. */
438 priv = __glXInitialize(dpy);
443 *major = priv->majorVersion;
445 *minor = priv->minorVersion;
450 ** Query the existance of the GLX extension
453 glXQueryExtension(Display * dpy, int *errorBase, int *eventBase)
455 int major_op, erb, evb;
458 rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
469 ** Put a barrier in the token stream that forces the GL to finish its
470 ** work before X can proceed.
475 struct glx_context *gc = __glXGetCurrentContext();
477 if (gc && gc->vtable->wait_gl)
478 gc->vtable->wait_gl(gc);
482 ** Put a barrier in the token stream that forces X to finish its
483 ** work before GL can proceed.
488 struct glx_context *gc = __glXGetCurrentContext();
490 if (gc && gc->vtable->wait_x)
491 gc->vtable->wait_x(gc);
495 glXUseXFont(Font font, int first, int count, int listBase)
497 struct glx_context *gc = __glXGetCurrentContext();
499 if (gc && gc->vtable->use_x_font)
500 gc->vtable->use_x_font(gc, font, first, count, listBase);
503 /************************************************************************/
506 ** Copy the source context to the destination context using the
510 glXCopyContext(Display * dpy, GLXContext source_user,
511 GLXContext dest_user, unsigned long mask)
513 struct glx_context *source = (struct glx_context *) source_user;
514 struct glx_context *dest = (struct glx_context *) dest_user;
515 #ifdef GLX_USE_APPLEGL
516 struct glx_context *gc = __glXGetCurrentContext();
520 if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext,
521 mask, &errorcode, &x11error)) {
522 __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error);
526 xGLXCopyContextReq *req;
527 struct glx_context *gc = __glXGetCurrentContext();
531 opcode = __glXSetupForCommand(dpy);
536 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
538 /* NOT_DONE: This does not work yet */
543 ** If the source is the current context, send its tag so that the context
544 ** can be flushed before the copy.
546 if (source == gc && dpy == gc->currentDpy) {
547 tag = gc->currentContextTag;
553 /* Send the glXCopyContext request */
555 GetReq(GLXCopyContext, req);
556 req->reqType = opcode;
557 req->glxCode = X_GLXCopyContext;
558 req->source = source ? source->xid : None;
559 req->dest = dest ? dest->xid : None;
561 req->contextTag = tag;
564 #endif /* GLX_USE_APPLEGL */
569 * Determine if a context uses direct rendering.
571 * \param dpy Display where the context was created.
572 * \param contextID ID of the context to be tested.
574 * \returns \c GL_TRUE if the context is direct rendering or not.
577 __glXIsDirect(Display * dpy, GLXContextID contextID)
579 #if !defined(USE_XCB)
580 xGLXIsDirectReq *req;
581 xGLXIsDirectReply reply;
585 opcode = __glXSetupForCommand(dpy);
591 xcb_connection_t *c = XGetXCBConnection(dpy);
592 xcb_glx_is_direct_reply_t *reply = xcb_glx_is_direct_reply(c,
597 const Bool is_direct = reply->is_direct ? True : False;
602 /* Send the glXIsDirect request */
604 GetReq(GLXIsDirect, req);
605 req->reqType = opcode;
606 req->glxCode = X_GLXIsDirect;
607 req->context = contextID;
608 _XReply(dpy, (xReply *) & reply, 0, False);
612 return reply.isDirect;
618 * Shouldn't this function \b always return \c GL_FALSE when
619 * \c GLX_DIRECT_RENDERING is not defined? Do we really need to bother with
620 * the GLX protocol here at all?
623 glXIsDirect(Display * dpy, GLXContext gc_user)
625 struct glx_context *gc = (struct glx_context *) gc_user;
630 else if (gc->isDirect) {
633 #ifdef GLX_USE_APPLEGL /* TODO: indirect on darwin */
636 return __glXIsDirect(dpy, gc->xid);
641 glXCreateGLXPixmap(Display * dpy, XVisualInfo * vis, Pixmap pixmap)
643 #ifdef GLX_USE_APPLEGL
644 int screen = vis->screen;
645 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen);
646 const struct glx_config *config;
648 config = glx_config_find_visual(psc->visuals, vis->visualid);
650 if(apple_glx_pixmap_create(dpy, vis->screen, pixmap, config))
655 xGLXCreateGLXPixmapReq *req;
656 struct glx_drawable *glxDraw;
660 opcode = __glXSetupForCommand(dpy);
665 glxDraw = Xmalloc(sizeof(*glxDraw));
669 /* Send the glXCreateGLXPixmap request */
671 GetReq(GLXCreateGLXPixmap, req);
672 req->reqType = opcode;
673 req->glxCode = X_GLXCreateGLXPixmap;
674 req->screen = vis->screen;
675 req->visual = vis->visualid;
676 req->pixmap = pixmap;
677 req->glxpixmap = xid = XAllocID(dpy);
681 if (InitGLXDrawable(dpy, glxDraw, pixmap, req->glxpixmap)) {
686 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
688 /* FIXME: Maybe delay __DRIdrawable creation until the drawable
689 * is actually bound to a context... */
691 struct glx_display *const priv = __glXInitialize(dpy);
692 __GLXDRIdrawable *pdraw;
693 struct glx_screen *psc;
694 struct glx_config *config;
696 psc = priv->screens[vis->screen];
697 if (psc->driScreen == NULL)
700 config = glx_config_find_visual(psc->visuals, vis->visualid);
701 pdraw = psc->driScreen->createDrawable(psc, pixmap, xid, config);
703 fprintf(stderr, "failed to create pixmap\n");
708 if (__glxHashInsert(priv->drawHash, xid, pdraw)) {
709 (*pdraw->destroyDrawable) (pdraw);
716 xGLXDestroyGLXPixmapReq *dreq;
718 GetReq(GLXDestroyGLXPixmap, dreq);
719 dreq->reqType = opcode;
720 dreq->glxCode = X_GLXDestroyGLXPixmap;
721 dreq->glxpixmap = xid;
732 ** Destroy the named pixmap
735 glXDestroyGLXPixmap(Display * dpy, GLXPixmap glxpixmap)
737 #ifdef GLX_USE_APPLEGL
738 if(apple_glx_pixmap_destroy(dpy, glxpixmap))
739 __glXSendError(dpy, GLXBadPixmap, glxpixmap, X_GLXDestroyPixmap, false);
741 xGLXDestroyGLXPixmapReq *req;
744 opcode = __glXSetupForCommand(dpy);
749 /* Send the glXDestroyGLXPixmap request */
751 GetReq(GLXDestroyGLXPixmap, req);
752 req->reqType = opcode;
753 req->glxCode = X_GLXDestroyGLXPixmap;
754 req->glxpixmap = glxpixmap;
758 DestroyGLXDrawable(dpy, glxpixmap);
760 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
762 struct glx_display *const priv = __glXInitialize(dpy);
763 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, glxpixmap);
766 (*pdraw->destroyDrawable) (pdraw);
767 __glxHashDelete(priv->drawHash, glxpixmap);
771 #endif /* GLX_USE_APPLEGL */
775 glXSwapBuffers(Display * dpy, GLXDrawable drawable)
777 #ifdef GLX_USE_APPLEGL
778 struct glx_context * gc = __glXGetCurrentContext();
779 if(gc && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
780 apple_glx_swap_buffers(gc->driContext);
782 __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false);
785 struct glx_context *gc;
791 xGLXSwapBuffersReq *req;
794 gc = __glXGetCurrentContext();
796 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
797 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
800 if (gc && drawable == gc->currentDrawable) {
804 (*pdraw->psc->driScreen->swapBuffers)(pdraw, 0, 0, 0);
809 opcode = __glXSetupForCommand(dpy);
815 ** The calling thread may or may not have a current context. If it
816 ** does, send the context tag so the server can do a flush.
818 if ((gc != NULL) && (dpy == gc->currentDpy) &&
819 ((drawable == gc->currentDrawable)
820 || (drawable == gc->currentReadable))) {
821 tag = gc->currentContextTag;
828 c = XGetXCBConnection(dpy);
829 xcb_glx_swap_buffers(c, tag, drawable);
832 /* Send the glXSwapBuffers request */
834 GetReq(GLXSwapBuffers, req);
835 req->reqType = opcode;
836 req->glxCode = X_GLXSwapBuffers;
837 req->drawable = drawable;
838 req->contextTag = tag;
843 #endif /* GLX_USE_APPLEGL */
848 ** Return configuration information for the given display, screen and
849 ** visual combination.
852 glXGetConfig(Display * dpy, XVisualInfo * vis, int attribute,
855 struct glx_display *priv;
856 struct glx_screen *psc;
857 struct glx_config *config;
860 status = GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc);
861 if (status == Success) {
862 config = glx_config_find_visual(psc->visuals, vis->visualid);
864 /* Lookup attribute after first finding a match on the visual */
865 if (config != NULL) {
866 return glx_config_get(config, attribute, value_return);
869 status = GLX_BAD_VISUAL;
873 ** If we can't find the config for this visual, this visual is not
874 ** supported by the OpenGL implementation on the server.
876 if ((status == GLX_BAD_VISUAL) && (attribute == GLX_USE_GL)) {
877 *value_return = GL_FALSE;
884 /************************************************************************/
887 init_fbconfig_for_chooser(struct glx_config * config,
888 GLboolean fbconfig_style_tags)
890 memset(config, 0, sizeof(struct glx_config));
891 config->visualID = (XID) GLX_DONT_CARE;
892 config->visualType = GLX_DONT_CARE;
894 /* glXChooseFBConfig specifies different defaults for these two than
897 if (fbconfig_style_tags) {
898 config->rgbMode = GL_TRUE;
899 config->doubleBufferMode = GLX_DONT_CARE;
902 config->visualRating = GLX_DONT_CARE;
903 config->transparentPixel = GLX_NONE;
904 config->transparentRed = GLX_DONT_CARE;
905 config->transparentGreen = GLX_DONT_CARE;
906 config->transparentBlue = GLX_DONT_CARE;
907 config->transparentAlpha = GLX_DONT_CARE;
908 config->transparentIndex = GLX_DONT_CARE;
910 config->drawableType = GLX_WINDOW_BIT;
912 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
913 config->xRenderable = GLX_DONT_CARE;
914 config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
916 config->swapMethod = GLX_DONT_CARE;
919 #define MATCH_DONT_CARE( param ) \
921 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
922 && (a-> param != b-> param) ) { \
927 #define MATCH_MINIMUM( param ) \
929 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
930 && (a-> param > b-> param) ) { \
935 #define MATCH_EXACT( param ) \
937 if ( a-> param != b-> param) { \
942 /* Test that all bits from a are contained in b */
943 #define MATCH_MASK(param) \
945 if ((a->param & ~b->param) != 0) \
950 * Determine if two GLXFBConfigs are compatible.
952 * \param a Application specified config to test.
953 * \param b Server specified config to test against \c a.
956 fbconfigs_compatible(const struct glx_config * const a,
957 const struct glx_config * const b)
959 MATCH_DONT_CARE(doubleBufferMode);
960 MATCH_DONT_CARE(visualType);
961 MATCH_DONT_CARE(visualRating);
962 MATCH_DONT_CARE(xRenderable);
963 MATCH_DONT_CARE(fbconfigID);
964 MATCH_DONT_CARE(swapMethod);
966 MATCH_MINIMUM(rgbBits);
967 MATCH_MINIMUM(numAuxBuffers);
968 MATCH_MINIMUM(redBits);
969 MATCH_MINIMUM(greenBits);
970 MATCH_MINIMUM(blueBits);
971 MATCH_MINIMUM(alphaBits);
972 MATCH_MINIMUM(depthBits);
973 MATCH_MINIMUM(stencilBits);
974 MATCH_MINIMUM(accumRedBits);
975 MATCH_MINIMUM(accumGreenBits);
976 MATCH_MINIMUM(accumBlueBits);
977 MATCH_MINIMUM(accumAlphaBits);
978 MATCH_MINIMUM(sampleBuffers);
979 MATCH_MINIMUM(maxPbufferWidth);
980 MATCH_MINIMUM(maxPbufferHeight);
981 MATCH_MINIMUM(maxPbufferPixels);
982 MATCH_MINIMUM(samples);
984 MATCH_DONT_CARE(stereoMode);
987 MATCH_MASK(drawableType);
988 MATCH_MASK(renderType);
990 /* There is a bug in a few of the XFree86 DDX drivers. They contain
991 * visuals with a "transparent type" of 0 when they really mean GLX_NONE.
992 * Technically speaking, it is a bug in the DDX driver, but there is
993 * enough of an installed base to work around the problem here. In any
994 * case, 0 is not a valid value of the transparent type, so we'll treat 0
995 * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and
996 * 0 from the server to be a match to maintain backward compatibility with
997 * the (broken) drivers.
1000 if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) {
1001 if (a->transparentPixel == GLX_NONE) {
1002 if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0)
1006 MATCH_EXACT(transparentPixel);
1009 switch (a->transparentPixel) {
1010 case GLX_TRANSPARENT_RGB:
1011 MATCH_DONT_CARE(transparentRed);
1012 MATCH_DONT_CARE(transparentGreen);
1013 MATCH_DONT_CARE(transparentBlue);
1014 MATCH_DONT_CARE(transparentAlpha);
1017 case GLX_TRANSPARENT_INDEX:
1018 MATCH_DONT_CARE(transparentIndex);
1030 /* There's some trickly language in the GLX spec about how this is supposed
1031 * to work. Basically, if a given component size is either not specified
1032 * or the requested size is zero, it is supposed to act like PERFER_SMALLER.
1033 * Well, that's really hard to do with the code as-is. This behavior is
1034 * closer to correct, but still not technically right.
1036 #define PREFER_LARGER_OR_ZERO(comp) \
1038 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1039 if ( ((*a)-> comp) == 0 ) { \
1042 else if ( ((*b)-> comp) == 0 ) { \
1046 return ((*b)-> comp) - ((*a)-> comp) ; \
1051 #define PREFER_LARGER(comp) \
1053 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1054 return ((*b)-> comp) - ((*a)-> comp) ; \
1058 #define PREFER_SMALLER(comp) \
1060 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1061 return ((*a)-> comp) - ((*b)-> comp) ; \
1066 * Compare two GLXFBConfigs. This function is intended to be used as the
1067 * compare function passed in to qsort.
1069 * \returns If \c a is a "better" config, according to the specification of
1070 * SGIX_fbconfig, a number less than zero is returned. If \c b is
1071 * better, then a number greater than zero is return. If both are
1072 * equal, zero is returned.
1073 * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1076 fbconfig_compare(struct glx_config **a, struct glx_config **b)
1078 /* The order of these comparisons must NOT change. It is defined by
1079 * the GLX 1.3 spec and ARB_multisample.
1082 PREFER_SMALLER(visualSelectGroup);
1084 /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and
1085 * GLX_NON_CONFORMANT_CONFIG. It just so happens that this is the
1086 * numerical sort order of the enums (0x8000, 0x8001, and 0x800D).
1088 PREFER_SMALLER(visualRating);
1090 /* This isn't quite right. It is supposed to compare the sum of the
1091 * components the user specifically set minimums for.
1093 PREFER_LARGER_OR_ZERO(redBits);
1094 PREFER_LARGER_OR_ZERO(greenBits);
1095 PREFER_LARGER_OR_ZERO(blueBits);
1096 PREFER_LARGER_OR_ZERO(alphaBits);
1098 PREFER_SMALLER(rgbBits);
1100 if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) {
1101 /* Prefer single-buffer.
1103 return (!(*a)->doubleBufferMode) ? -1 : 1;
1106 PREFER_SMALLER(numAuxBuffers);
1108 PREFER_LARGER_OR_ZERO(depthBits);
1109 PREFER_SMALLER(stencilBits);
1111 /* This isn't quite right. It is supposed to compare the sum of the
1112 * components the user specifically set minimums for.
1114 PREFER_LARGER_OR_ZERO(accumRedBits);
1115 PREFER_LARGER_OR_ZERO(accumGreenBits);
1116 PREFER_LARGER_OR_ZERO(accumBlueBits);
1117 PREFER_LARGER_OR_ZERO(accumAlphaBits);
1119 PREFER_SMALLER(visualType);
1121 /* None of the multisample specs say where this comparison should happen,
1122 * so I put it near the end.
1124 PREFER_SMALLER(sampleBuffers);
1125 PREFER_SMALLER(samples);
1127 /* None of the pbuffer or fbconfig specs say that this comparison needs
1128 * to happen at all, but it seems like it should.
1130 PREFER_LARGER(maxPbufferWidth);
1131 PREFER_LARGER(maxPbufferHeight);
1132 PREFER_LARGER(maxPbufferPixels);
1139 * Selects and sorts a subset of the supplied configs based on the attributes.
1140 * This function forms to basis of \c glXChooseVisual, \c glXChooseFBConfig,
1141 * and \c glXChooseFBConfigSGIX.
1143 * \param configs Array of pointers to possible configs. The elements of
1144 * this array that do not meet the criteria will be set to
1145 * NULL. The remaining elements will be sorted according to
1146 * the various visual / FBConfig selection rules.
1147 * \param num_configs Number of elements in the \c configs array.
1148 * \param attribList Attributes used select from \c configs. This array is
1149 * terminated by a \c None tag. The array can either take
1150 * the form expected by \c glXChooseVisual (where boolean
1151 * tags do not have a value) or by \c glXChooseFBConfig
1152 * (where every tag has a value).
1153 * \param fbconfig_style_tags Selects whether \c attribList is in
1154 * \c glXChooseVisual style or
1155 * \c glXChooseFBConfig style.
1156 * \returns The number of valid elements left in \c configs.
1158 * \sa glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1161 choose_visual(struct glx_config ** configs, int num_configs,
1162 const int *attribList, GLboolean fbconfig_style_tags)
1164 struct glx_config test_config;
1168 /* This is a fairly direct implementation of the selection method
1169 * described by GLX_SGIX_fbconfig. Start by culling out all the
1170 * configs that are not compatible with the selected parameter
1174 init_fbconfig_for_chooser(&test_config, fbconfig_style_tags);
1175 __glXInitializeVisualConfigFromTags(&test_config, 512,
1176 (const INT32 *) attribList,
1177 GL_TRUE, fbconfig_style_tags);
1180 for (i = 0; i < num_configs; i++) {
1181 if (fbconfigs_compatible(&test_config, configs[i])) {
1182 configs[base] = configs[i];
1191 if (base < num_configs) {
1192 (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base));
1195 /* After the incompatible configs are removed, the resulting
1196 * list is sorted according to the rules set out in the various
1200 qsort(configs, base, sizeof(struct glx_config *),
1201 (int (*)(const void *, const void *)) fbconfig_compare);
1209 ** Return the visual that best matches the template. Return None if no
1210 ** visual matches the template.
1212 _X_EXPORT XVisualInfo *
1213 glXChooseVisual(Display * dpy, int screen, int *attribList)
1215 XVisualInfo *visualList = NULL;
1216 struct glx_display *priv;
1217 struct glx_screen *psc;
1218 struct glx_config test_config;
1219 struct glx_config *config;
1220 struct glx_config *best_config = NULL;
1223 ** Get a list of all visuals, return if list is empty
1225 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1231 ** Build a template from the defaults and the attribute list
1232 ** Free visual list and return if an unexpected token is encountered
1234 init_fbconfig_for_chooser(&test_config, GL_FALSE);
1235 __glXInitializeVisualConfigFromTags(&test_config, 512,
1236 (const INT32 *) attribList,
1240 ** Eliminate visuals that don't meet minimum requirements
1241 ** Compute a score for those that do
1242 ** Remember which visual, if any, got the highest score
1243 ** If no visual is acceptable, return None
1244 ** Otherwise, create an XVisualInfo list with just the selected X visual
1247 for (config = psc->visuals; config != NULL; config = config->next) {
1248 if (fbconfigs_compatible(&test_config, config)
1249 && ((best_config == NULL) ||
1250 (fbconfig_compare (&config, &best_config) < 0))) {
1251 XVisualInfo visualTemplate;
1252 XVisualInfo *newList;
1255 visualTemplate.screen = screen;
1256 visualTemplate.visualid = config->visualID;
1257 newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask,
1258 &visualTemplate, &i);
1262 visualList = newList;
1263 best_config = config;
1268 #ifdef GLX_USE_APPLEGL
1269 if(visualList && getenv("LIBGL_DUMP_VISUALID")) {
1270 printf("visualid 0x%lx\n", visualList[0].visualid);
1278 _X_EXPORT const char *
1279 glXQueryExtensionsString(Display * dpy, int screen)
1281 struct glx_screen *psc;
1282 struct glx_display *priv;
1284 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1288 if (!psc->effectiveGLXexts) {
1289 if (!psc->serverGLXexts) {
1290 psc->serverGLXexts =
1291 __glXQueryServerString(dpy, priv->majorOpcode, screen,
1295 __glXCalculateUsableExtensions(psc,
1296 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
1297 (psc->driScreen != NULL),
1301 priv->minorVersion);
1304 return psc->effectiveGLXexts;
1307 _X_EXPORT const char *
1308 glXGetClientString(Display * dpy, int name)
1314 return (__glXGLXClientVendorName);
1316 return (__glXGLXClientVersion);
1317 case GLX_EXTENSIONS:
1318 return (__glXGetClientExtensions());
1324 _X_EXPORT const char *
1325 glXQueryServerString(Display * dpy, int screen, int name)
1327 struct glx_screen *psc;
1328 struct glx_display *priv;
1332 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1338 str = &priv->serverGLXvendor;
1341 str = &priv->serverGLXversion;
1343 case GLX_EXTENSIONS:
1344 str = &psc->serverGLXexts;
1351 *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
1358 __glXClientInfo(Display * dpy, int opcode)
1360 char *ext_str = __glXGetClientGLExtensionString();
1361 int size = strlen(ext_str) + 1;
1364 xcb_connection_t *c = XGetXCBConnection(dpy);
1365 xcb_glx_client_info(c,
1366 GLX_MAJOR_VERSION, GLX_MINOR_VERSION, size, ext_str);
1368 xGLXClientInfoReq *req;
1370 /* Send the glXClientInfo request */
1372 GetReq(GLXClientInfo, req);
1373 req->reqType = opcode;
1374 req->glxCode = X_GLXClientInfo;
1375 req->major = GLX_MAJOR_VERSION;
1376 req->minor = GLX_MINOR_VERSION;
1378 req->length += (size + 3) >> 2;
1379 req->numbytes = size;
1380 Data(dpy, ext_str, size);
1384 #endif /* USE_XCB */
1391 ** EXT_import_context
1395 glXGetCurrentDisplay(void)
1397 struct glx_context *gc = __glXGetCurrentContext();
1400 return gc->currentDpy;
1404 GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (),
1405 glXGetCurrentDisplay)
1407 #ifndef GLX_USE_APPLEGL
1408 _X_EXPORT GLXContext
1409 glXImportContextEXT(Display *dpy, GLXContextID contextID)
1411 struct glx_display *priv = __glXInitialize(dpy);
1412 struct glx_screen *psc;
1413 xGLXQueryContextReply reply;
1415 struct glx_context *ctx;
1416 int propList[__GLX_MAX_CONTEXT_PROPS * 2], *pProp, nPropListBytes;
1419 struct glx_config *mode;
1421 if (contextID == None || __glXIsDirect(dpy, contextID))
1424 opcode = __glXSetupForCommand(dpy);
1428 /* Send the glXQueryContextInfoEXT request */
1431 if (priv->majorVersion > 1 || priv->minorVersion >= 3) {
1432 xGLXQueryContextReq *req;
1434 GetReq(GLXQueryContext, req);
1436 req->reqType = opcode;
1437 req->glxCode = X_GLXQueryContext;
1438 req->context = contextID;
1441 xGLXVendorPrivateReq *vpreq;
1442 xGLXQueryContextInfoEXTReq *req;
1444 GetReqExtra(GLXVendorPrivate,
1445 sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq,
1447 req = (xGLXQueryContextInfoEXTReq *) vpreq;
1448 req->reqType = opcode;
1449 req->glxCode = X_GLXVendorPrivateWithReply;
1450 req->vendorCode = X_GLXvop_QueryContextInfoEXT;
1451 req->context = contextID;
1454 _XReply(dpy, (xReply *) & reply, 0, False);
1456 if (reply.n <= __GLX_MAX_CONTEXT_PROPS)
1457 nPropListBytes = reply.n * 2 * sizeof propList[0];
1460 _XRead(dpy, (char *) propList, nPropListBytes);
1464 /* Look up screen first so we can look up visuals/fbconfigs later */
1466 for (i = 0, pProp = propList; i < reply.n; i++, pProp += 2)
1467 if (pProp[0] == GLX_SCREEN)
1468 psc = GetGLXScreenConfigs(dpy, pProp[1]);
1477 for (i = 0, pProp = propList; i < reply.n; i++, pProp += 2)
1479 case GLX_SHARE_CONTEXT_EXT:
1482 case GLX_VISUAL_ID_EXT:
1483 mode = glx_config_find_visual(psc->visuals, pProp[1]);
1485 case GLX_FBCONFIG_ID:
1486 mode = glx_config_find_fbconfig(psc->configs, pProp[1]);
1488 case GLX_RENDER_TYPE:
1489 renderType = pProp[1];
1496 ctx = indirect_create_context(psc, mode, NULL, renderType);
1500 ctx->xid = contextID;
1501 ctx->imported = GL_TRUE;
1502 ctx->share_xid = share;
1504 return (GLXContext) ctx;
1510 glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value)
1512 struct glx_context *ctx = (struct glx_context *) ctx_user;
1514 switch (attribute) {
1515 case GLX_SHARE_CONTEXT_EXT:
1516 *value = ctx->share_xid;
1518 case GLX_VISUAL_ID_EXT:
1519 *value = ctx->config ? ctx->config->visualID : None;
1522 *value = ctx->screen;
1524 case GLX_FBCONFIG_ID:
1525 *value = ctx->config ? ctx->config->fbconfigID : None;
1527 case GLX_RENDER_TYPE:
1528 *value = ctx->renderType;
1531 return GLX_BAD_ATTRIBUTE;
1537 GLX_ALIAS(int, glXQueryContextInfoEXT,
1538 (Display * dpy, GLXContext ctx, int attribute, int *value),
1539 (dpy, ctx, attribute, value), glXQueryContext)
1541 _X_EXPORT GLXContextID glXGetContextIDEXT(const GLXContext ctx_user)
1543 struct glx_context *ctx = (struct glx_context *) ctx_user;
1549 GLX_ALIAS_VOID(glXFreeContextEXT, (Display *dpy, GLXContext ctx), (dpy, ctx),
1552 _X_EXPORT GLXFBConfig *
1553 glXChooseFBConfig(Display * dpy, int screen,
1554 const int *attribList, int *nitems)
1556 struct glx_config **config_list;
1560 config_list = (struct glx_config **)
1561 glXGetFBConfigs(dpy, screen, &list_size);
1563 if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) {
1564 list_size = choose_visual(config_list, list_size, attribList, GL_TRUE);
1565 if (list_size == 0) {
1571 *nitems = list_size;
1572 return (GLXFBConfig *) config_list;
1576 _X_EXPORT GLXContext
1577 glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig,
1578 int renderType, GLXContext shareList, Bool allowDirect)
1580 struct glx_config *config = (struct glx_config *) fbconfig;
1582 return CreateContext(dpy, config->fbconfigID, config, shareList,
1583 allowDirect, X_GLXCreateNewContext, renderType,
1588 _X_EXPORT GLXDrawable
1589 glXGetCurrentReadDrawable(void)
1591 struct glx_context *gc = __glXGetCurrentContext();
1593 return gc->currentReadable;
1597 _X_EXPORT GLXFBConfig *
1598 glXGetFBConfigs(Display * dpy, int screen, int *nelements)
1600 struct glx_display *priv = __glXInitialize(dpy);
1601 struct glx_config **config_list = NULL;
1602 struct glx_config *config;
1603 unsigned num_configs = 0;
1607 if (priv && (priv->screens != NULL)
1608 && (screen >= 0) && (screen <= ScreenCount(dpy))
1609 && (priv->screens[screen]->configs != NULL)
1610 && (priv->screens[screen]->configs->fbconfigID
1611 != (int) GLX_DONT_CARE)) {
1613 for (config = priv->screens[screen]->configs; config != NULL;
1614 config = config->next) {
1615 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1620 config_list = Xmalloc(num_configs * sizeof *config_list);
1621 if (config_list != NULL) {
1622 *nelements = num_configs;
1624 for (config = priv->screens[screen]->configs; config != NULL;
1625 config = config->next) {
1626 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1627 config_list[i] = config;
1634 return (GLXFBConfig *) config_list;
1639 glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig,
1640 int attribute, int *value)
1642 struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig);
1645 return GLXBadFBConfig;
1647 return glx_config_get(config, attribute, value);
1651 _X_EXPORT XVisualInfo *
1652 glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig)
1654 XVisualInfo visualTemplate;
1655 struct glx_config *config = (struct glx_config *) fbconfig;
1659 ** Get a list of all visuals, return if list is empty
1661 visualTemplate.visualid = config->visualID;
1662 return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count);
1665 #ifndef GLX_USE_APPLEGL
1667 ** GLX_SGI_swap_control
1670 __glXSwapIntervalSGI(int interval)
1672 xGLXVendorPrivateReq *req;
1673 struct glx_context *gc = __glXGetCurrentContext();
1674 struct glx_screen *psc;
1676 CARD32 *interval_ptr;
1680 return GLX_BAD_CONTEXT;
1683 if (interval <= 0) {
1684 return GLX_BAD_VALUE;
1687 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1689 #ifdef GLX_DIRECT_RENDERING
1690 if (gc->isDirect && psc->driScreen && psc->driScreen->setSwapInterval) {
1691 __GLXDRIdrawable *pdraw =
1692 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1693 psc->driScreen->setSwapInterval(pdraw, interval);
1698 dpy = gc->currentDpy;
1699 opcode = __glXSetupForCommand(dpy);
1704 /* Send the glXSwapIntervalSGI request */
1706 GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req);
1707 req->reqType = opcode;
1708 req->glxCode = X_GLXVendorPrivate;
1709 req->vendorCode = X_GLXvop_SwapIntervalSGI;
1710 req->contextTag = gc->currentContextTag;
1712 interval_ptr = (CARD32 *) (req + 1);
1713 *interval_ptr = interval;
1724 ** GLX_MESA_swap_control
1727 __glXSwapIntervalMESA(unsigned int interval)
1729 #ifdef GLX_DIRECT_RENDERING
1730 struct glx_context *gc = __glXGetCurrentContext();
1732 if (gc != NULL && gc->isDirect) {
1733 struct glx_screen *psc;
1735 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1736 if (psc->driScreen && psc->driScreen->setSwapInterval) {
1737 __GLXDRIdrawable *pdraw =
1738 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1739 return psc->driScreen->setSwapInterval(pdraw, interval);
1744 return GLX_BAD_CONTEXT;
1749 __glXGetSwapIntervalMESA(void)
1751 #ifdef GLX_DIRECT_RENDERING
1752 struct glx_context *gc = __glXGetCurrentContext();
1754 if (gc != NULL && gc->isDirect) {
1755 struct glx_screen *psc;
1757 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1758 if (psc->driScreen && psc->driScreen->getSwapInterval) {
1759 __GLXDRIdrawable *pdraw =
1760 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1761 return psc->driScreen->getSwapInterval(pdraw);
1771 ** GLX_SGI_video_sync
1774 __glXGetVideoSyncSGI(unsigned int *count)
1776 int64_t ust, msc, sbc;
1778 struct glx_context *gc = __glXGetCurrentContext();
1779 struct glx_screen *psc;
1780 #ifdef GLX_DIRECT_RENDERING
1781 __GLXDRIdrawable *pdraw;
1785 return GLX_BAD_CONTEXT;
1787 #ifdef GLX_DIRECT_RENDERING
1789 return GLX_BAD_CONTEXT;
1792 psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen);
1793 #ifdef GLX_DIRECT_RENDERING
1794 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1797 /* FIXME: Looking at the GLX_SGI_video_sync spec in the extension registry,
1798 * FIXME: there should be a GLX encoding for this call. I can find no
1799 * FIXME: documentation for the GLX encoding.
1801 #ifdef GLX_DIRECT_RENDERING
1802 if (psc->driScreen && psc->driScreen->getDrawableMSC) {
1803 ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc);
1804 *count = (unsigned) msc;
1805 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1809 return GLX_BAD_CONTEXT;
1813 __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
1815 struct glx_context *gc = __glXGetCurrentContext();
1816 struct glx_screen *psc;
1817 #ifdef GLX_DIRECT_RENDERING
1818 __GLXDRIdrawable *pdraw;
1820 int64_t ust, msc, sbc;
1823 if (divisor <= 0 || remainder < 0)
1824 return GLX_BAD_VALUE;
1827 return GLX_BAD_CONTEXT;
1829 #ifdef GLX_DIRECT_RENDERING
1831 return GLX_BAD_CONTEXT;
1834 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1835 #ifdef GLX_DIRECT_RENDERING
1836 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1839 #ifdef GLX_DIRECT_RENDERING
1840 if (psc->driScreen && psc->driScreen->waitForMSC) {
1841 ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc,
1843 *count = (unsigned) msc;
1844 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1848 return GLX_BAD_CONTEXT;
1851 #endif /* GLX_USE_APPLEGL */
1854 ** GLX_SGIX_fbconfig
1855 ** Many of these functions are aliased to GLX 1.3 entry points in the
1856 ** GLX_functions table.
1860 GLX_ALIAS(int, glXGetFBConfigAttribSGIX,
1861 (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value),
1862 (dpy, config, attribute, value), glXGetFBConfigAttrib)
1864 _X_EXPORT GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX,
1865 (Display * dpy, int screen, int *attrib_list,
1866 int *nelements), (dpy, screen, attrib_list, nelements),
1869 _X_EXPORT GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX,
1870 (Display * dpy, GLXFBConfigSGIX config),
1871 (dpy, config), glXGetVisualFromFBConfig)
1874 glXCreateGLXPixmapWithConfigSGIX(Display * dpy,
1875 GLXFBConfigSGIX fbconfig,
1878 #ifndef GLX_USE_APPLEGL
1879 xGLXVendorPrivateWithReplyReq *vpreq;
1880 xGLXCreateGLXPixmapWithConfigSGIXReq *req;
1881 GLXPixmap xid = None;
1883 struct glx_screen *psc;
1885 struct glx_config *config = (struct glx_config *) fbconfig;
1888 if ((dpy == NULL) || (config == NULL)) {
1891 #ifdef GLX_USE_APPLEGL
1892 if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config))
1897 psc = GetGLXScreenConfigs(dpy, config->screen);
1899 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1900 opcode = __glXSetupForCommand(dpy);
1905 /* Send the glXCreateGLXPixmapWithConfigSGIX request */
1907 GetReqExtra(GLXVendorPrivateWithReply,
1908 sz_xGLXCreateGLXPixmapWithConfigSGIXReq -
1909 sz_xGLXVendorPrivateWithReplyReq, vpreq);
1910 req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq;
1911 req->reqType = opcode;
1912 req->glxCode = X_GLXVendorPrivateWithReply;
1913 req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX;
1914 req->screen = config->screen;
1915 req->fbconfig = config->fbconfigID;
1916 req->pixmap = pixmap;
1917 req->glxpixmap = xid = XAllocID(dpy);
1926 _X_EXPORT GLXContext
1927 glXCreateContextWithConfigSGIX(Display * dpy,
1928 GLXFBConfigSGIX fbconfig, int renderType,
1929 GLXContext shareList, Bool allowDirect)
1931 GLXContext gc = NULL;
1932 struct glx_config *config = (struct glx_config *) fbconfig;
1933 struct glx_screen *psc;
1936 if ((dpy == NULL) || (config == NULL)) {
1940 psc = GetGLXScreenConfigs(dpy, config->screen);
1942 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1943 gc = CreateContext(dpy, config->fbconfigID, config, shareList,
1945 X_GLXvop_CreateContextWithConfigSGIX, renderType,
1953 _X_EXPORT GLXFBConfigSGIX
1954 glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis)
1956 struct glx_display *priv;
1957 struct glx_screen *psc = NULL;
1959 if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success)
1960 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)
1961 && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) {
1962 return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs,
1969 #ifndef GLX_USE_APPLEGL
1971 ** GLX_SGIX_swap_group
1974 __glXJoinSwapGroupSGIX(Display * dpy, GLXDrawable drawable,
1984 ** GLX_SGIX_swap_barrier
1987 __glXBindSwapBarrierSGIX(Display * dpy, GLXDrawable drawable, int barrier)
1995 __glXQueryMaxSwapBarriersSGIX(Display * dpy, int screen, int *max)
2005 ** GLX_OML_sync_control
2008 __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable,
2009 int64_t * ust, int64_t * msc, int64_t * sbc)
2011 struct glx_display * const priv = __glXInitialize(dpy);
2013 #ifdef GLX_DIRECT_RENDERING
2014 __GLXDRIdrawable *pdraw;
2016 struct glx_screen *psc;
2021 #ifdef GLX_DIRECT_RENDERING
2022 pdraw = GetGLXDRIDrawable(dpy, drawable);
2023 psc = pdraw ? pdraw->psc : NULL;
2024 if (pdraw && psc->driScreen->getDrawableMSC) {
2025 ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc);
2033 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2035 __glxGetMscRate(__GLXDRIdrawable *glxDraw,
2036 int32_t * numerator, int32_t * denominator)
2039 struct glx_screen *psc;
2040 XF86VidModeModeLine mode_line;
2045 if (XF86VidModeQueryVersion(psc->dpy, &i, &i) &&
2046 XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) {
2047 unsigned n = dot_clock * 1000;
2048 unsigned d = mode_line.vtotal * mode_line.htotal;
2050 # define V_INTERLACE 0x010
2051 # define V_DBLSCAN 0x020
2053 if (mode_line.flags & V_INTERLACE)
2055 else if (mode_line.flags & V_DBLSCAN)
2058 /* The OML_sync_control spec requires that if the refresh rate is a
2059 * whole number, that the returned numerator be equal to the refresh
2060 * rate and the denominator be 1.
2068 static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 };
2070 /* This is a poor man's way to reduce a fraction. It's far from
2071 * perfect, but it will work well enough for this situation.
2074 for (i = 0; f[i] != 0; i++) {
2075 while (n % f[i] == 0 && d % f[i] == 0) {
2095 * Determine the refresh rate of the specified drawable and display.
2097 * \param dpy Display whose refresh rate is to be determined.
2098 * \param drawable Drawable whose refresh rate is to be determined.
2099 * \param numerator Numerator of the refresh rate.
2100 * \param demoninator Denominator of the refresh rate.
2101 * \return If the refresh rate for the specified display and drawable could
2102 * be calculated, True is returned. Otherwise False is returned.
2104 * \note This function is implemented entirely client-side. A lot of other
2105 * functionality is required to export GLX_OML_sync_control, so on
2106 * XFree86 this function can be called for direct-rendering contexts
2107 * when GLX_OML_sync_control appears in the client extension string.
2111 __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
2112 int32_t * numerator, int32_t * denominator)
2114 #if defined( GLX_DIRECT_RENDERING ) && defined( XF86VIDMODE )
2115 __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable);
2120 return __glxGetMscRate(draw, numerator, denominator);
2132 __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable,
2133 int64_t target_msc, int64_t divisor, int64_t remainder)
2135 struct glx_context *gc = __glXGetCurrentContext();
2136 #ifdef GLX_DIRECT_RENDERING
2137 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2138 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2141 if (!gc) /* no GLX for this */
2144 #ifdef GLX_DIRECT_RENDERING
2145 if (!pdraw || !gc->isDirect)
2149 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2150 * error", but it also says "It [glXSwapBuffersMscOML] will return a value
2151 * of -1 if the function failed because of errors detected in the input
2154 if (divisor < 0 || remainder < 0 || target_msc < 0)
2156 if (divisor > 0 && remainder >= divisor)
2159 if (target_msc == 0 && divisor == 0 && remainder == 0)
2162 #ifdef GLX_DIRECT_RENDERING
2163 if (psc->driScreen && psc->driScreen->swapBuffers)
2164 return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor,
2173 __glXWaitForMscOML(Display * dpy, GLXDrawable drawable,
2174 int64_t target_msc, int64_t divisor,
2175 int64_t remainder, int64_t * ust,
2176 int64_t * msc, int64_t * sbc)
2178 #ifdef GLX_DIRECT_RENDERING
2179 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2180 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2185 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2186 * error", but the return type in the spec is Bool.
2188 if (divisor < 0 || remainder < 0 || target_msc < 0)
2190 if (divisor > 0 && remainder >= divisor)
2193 #ifdef GLX_DIRECT_RENDERING
2194 if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) {
2195 ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder,
2206 __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable,
2207 int64_t target_sbc, int64_t * ust,
2208 int64_t * msc, int64_t * sbc)
2210 #ifdef GLX_DIRECT_RENDERING
2211 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2212 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2216 /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE
2217 * error", but the return type in the spec is Bool.
2222 #ifdef GLX_DIRECT_RENDERING
2223 if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) {
2224 ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc);
2236 * Mesa extension stubs. These will help reduce portability problems.
2241 * Release all buffers associated with the specified GLX drawable.
2244 * This function was intended for stand-alone Mesa. The issue there is that
2245 * the library doesn't get any notification when a window is closed. In
2246 * DRI there is a similar but slightly different issue. When GLX 1.3 is
2247 * supported, there are 3 different functions to destroy a drawable. It
2248 * should be possible to create GLX protocol (or have it determine which
2249 * protocol to use based on the type of the drawable) to have one function
2250 * do the work of 3. For the direct-rendering case, this function could
2251 * just call the driver's \c __DRIdrawableRec::destroyDrawable function.
2252 * This would reduce the frequency with which \c __driGarbageCollectDrawables
2253 * would need to be used. This really should be done as part of the new DRI
2256 * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt
2257 * __driGarbageCollectDrawables
2258 * glXDestroyGLXPixmap
2259 * glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow
2260 * glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX
2263 __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d)
2272 glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual,
2273 Pixmap pixmap, Colormap cmap)
2286 * GLX_MESA_copy_sub_buffer
2288 #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */
2290 __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable,
2291 int x, int y, int width, int height)
2293 xGLXVendorPrivateReq *req;
2294 struct glx_context *gc;
2296 CARD32 *drawable_ptr;
2297 INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr;
2300 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2301 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2302 if (pdraw != NULL) {
2303 struct glx_screen *psc = pdraw->psc;
2304 if (psc->driScreen->copySubBuffer != NULL) {
2306 (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height);
2313 opcode = __glXSetupForCommand(dpy);
2318 ** The calling thread may or may not have a current context. If it
2319 ** does, send the context tag so the server can do a flush.
2321 gc = __glXGetCurrentContext();
2322 if ((gc != NULL) && (dpy == gc->currentDpy) &&
2323 ((drawable == gc->currentDrawable) ||
2324 (drawable == gc->currentReadable))) {
2325 tag = gc->currentContextTag;
2332 GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req);
2333 req->reqType = opcode;
2334 req->glxCode = X_GLXVendorPrivate;
2335 req->vendorCode = X_GLXvop_CopySubBufferMESA;
2336 req->contextTag = tag;
2338 drawable_ptr = (CARD32 *) (req + 1);
2339 x_ptr = (INT32 *) (drawable_ptr + 1);
2340 y_ptr = (INT32 *) (drawable_ptr + 2);
2341 w_ptr = (INT32 *) (drawable_ptr + 3);
2342 h_ptr = (INT32 *) (drawable_ptr + 4);
2344 *drawable_ptr = drawable;
2356 __glXBindTexImageEXT(Display * dpy,
2357 GLXDrawable drawable, int buffer, const int *attrib_list)
2359 struct glx_context *gc = __glXGetCurrentContext();
2361 if (gc == NULL || gc->vtable->bind_tex_image == NULL)
2364 gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list);
2368 __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer)
2370 struct glx_context *gc = __glXGetCurrentContext();
2372 if (gc == NULL || gc->vtable->release_tex_image == NULL)
2375 gc->vtable->release_tex_image(dpy, drawable, buffer);
2380 #endif /* GLX_USE_APPLEGL */
2383 * \c strdup is actually not a standard ANSI C or POSIX routine.
2384 * Irix will not define it if ANSI mode is in effect.
2389 __glXstrdup(const char *str)
2392 copy = (char *) Xmalloc(strlen(str) + 1);
2400 ** glXGetProcAddress support
2403 struct name_address_pair
2409 #define GLX_FUNCTION(f) { # f, (GLvoid *) f }
2410 #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f }
2412 static const struct name_address_pair GLX_functions[] = {
2413 /*** GLX_VERSION_1_0 ***/
2414 GLX_FUNCTION(glXChooseVisual),
2415 GLX_FUNCTION(glXCopyContext),
2416 GLX_FUNCTION(glXCreateContext),
2417 GLX_FUNCTION(glXCreateGLXPixmap),
2418 GLX_FUNCTION(glXDestroyContext),
2419 GLX_FUNCTION(glXDestroyGLXPixmap),
2420 GLX_FUNCTION(glXGetConfig),
2421 GLX_FUNCTION(glXGetCurrentContext),
2422 GLX_FUNCTION(glXGetCurrentDrawable),
2423 GLX_FUNCTION(glXIsDirect),
2424 GLX_FUNCTION(glXMakeCurrent),
2425 GLX_FUNCTION(glXQueryExtension),
2426 GLX_FUNCTION(glXQueryVersion),
2427 GLX_FUNCTION(glXSwapBuffers),
2428 GLX_FUNCTION(glXUseXFont),
2429 GLX_FUNCTION(glXWaitGL),
2430 GLX_FUNCTION(glXWaitX),
2432 /*** GLX_VERSION_1_1 ***/
2433 GLX_FUNCTION(glXGetClientString),
2434 GLX_FUNCTION(glXQueryExtensionsString),
2435 GLX_FUNCTION(glXQueryServerString),
2437 /*** GLX_VERSION_1_2 ***/
2438 GLX_FUNCTION(glXGetCurrentDisplay),
2440 /*** GLX_VERSION_1_3 ***/
2441 GLX_FUNCTION(glXChooseFBConfig),
2442 GLX_FUNCTION(glXCreateNewContext),
2443 GLX_FUNCTION(glXCreatePbuffer),
2444 GLX_FUNCTION(glXCreatePixmap),
2445 GLX_FUNCTION(glXCreateWindow),
2446 GLX_FUNCTION(glXDestroyPbuffer),
2447 GLX_FUNCTION(glXDestroyPixmap),
2448 GLX_FUNCTION(glXDestroyWindow),
2449 GLX_FUNCTION(glXGetCurrentReadDrawable),
2450 GLX_FUNCTION(glXGetFBConfigAttrib),
2451 GLX_FUNCTION(glXGetFBConfigs),
2452 GLX_FUNCTION(glXGetSelectedEvent),
2453 GLX_FUNCTION(glXGetVisualFromFBConfig),
2454 GLX_FUNCTION(glXMakeContextCurrent),
2455 GLX_FUNCTION(glXQueryContext),
2456 GLX_FUNCTION(glXQueryDrawable),
2457 GLX_FUNCTION(glXSelectEvent),
2459 #ifndef GLX_USE_APPLEGL
2460 /*** GLX_SGI_swap_control ***/
2461 GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI),
2463 /*** GLX_SGI_video_sync ***/
2464 GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI),
2465 GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI),
2467 /*** GLX_SGI_make_current_read ***/
2468 GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent),
2469 GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable),
2471 /*** GLX_EXT_import_context ***/
2472 GLX_FUNCTION(glXFreeContextEXT),
2473 GLX_FUNCTION(glXGetContextIDEXT),
2474 GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay),
2475 GLX_FUNCTION(glXImportContextEXT),
2476 GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext),
2479 /*** GLX_SGIX_fbconfig ***/
2480 GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib),
2481 GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig),
2482 GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX),
2483 GLX_FUNCTION(glXCreateContextWithConfigSGIX),
2484 GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig),
2485 GLX_FUNCTION(glXGetFBConfigFromVisualSGIX),
2487 #ifndef GLX_USE_APPLEGL
2488 /*** GLX_SGIX_pbuffer ***/
2489 GLX_FUNCTION(glXCreateGLXPbufferSGIX),
2490 GLX_FUNCTION(glXDestroyGLXPbufferSGIX),
2491 GLX_FUNCTION(glXQueryGLXPbufferSGIX),
2492 GLX_FUNCTION(glXSelectEventSGIX),
2493 GLX_FUNCTION(glXGetSelectedEventSGIX),
2495 /*** GLX_SGIX_swap_group ***/
2496 GLX_FUNCTION2(glXJoinSwapGroupSGIX, __glXJoinSwapGroupSGIX),
2498 /*** GLX_SGIX_swap_barrier ***/
2499 GLX_FUNCTION2(glXBindSwapBarrierSGIX, __glXBindSwapBarrierSGIX),
2500 GLX_FUNCTION2(glXQueryMaxSwapBarriersSGIX, __glXQueryMaxSwapBarriersSGIX),
2502 /*** GLX_MESA_copy_sub_buffer ***/
2503 GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA),
2505 /*** GLX_MESA_pixmap_colormap ***/
2506 GLX_FUNCTION(glXCreateGLXPixmapMESA),
2508 /*** GLX_MESA_release_buffers ***/
2509 GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA),
2511 /*** GLX_MESA_swap_control ***/
2512 GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA),
2513 GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA),
2516 /*** GLX_ARB_get_proc_address ***/
2517 GLX_FUNCTION(glXGetProcAddressARB),
2520 GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB),
2522 #ifndef GLX_USE_APPLEGL
2523 /*** GLX_OML_sync_control ***/
2524 GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML),
2525 GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML),
2526 GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML),
2527 GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML),
2528 GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML),
2530 /*** GLX_EXT_texture_from_pixmap ***/
2531 GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT),
2532 GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT),
2535 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2536 /*** DRI configuration ***/
2537 GLX_FUNCTION(glXGetScreenDriver),
2538 GLX_FUNCTION(glXGetDriverConfig),
2541 {NULL, NULL} /* end of list */
2544 static const GLvoid *
2545 get_glx_proc_address(const char *funcName)
2549 /* try static functions */
2550 for (i = 0; GLX_functions[i].Name; i++) {
2551 if (strcmp(GLX_functions[i].Name, funcName) == 0)
2552 return GLX_functions[i].Address;
2559 * Get the address of a named GL function. This is the pre-GLX 1.4 name for
2560 * \c glXGetProcAddress.
2562 * \param procName Name of a GL or GLX function.
2563 * \returns A pointer to the named function
2565 * \sa glXGetProcAddress
2567 _X_EXPORT void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
2569 typedef void (*gl_function) (void);
2573 /* Search the table of GLX and internal functions first. If that
2574 * fails and the supplied name could be a valid core GL name, try
2575 * searching the core GL function table. This check is done to prevent
2576 * DRI based drivers from searching the core GL function table for
2577 * internal API functions.
2579 f = (gl_function) get_glx_proc_address((const char *) procName);
2580 if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l')
2581 && (procName[2] != 'X')) {
2582 #ifdef GLX_SHARED_GLAPI
2583 f = (gl_function) __indirect_get_proc_address((const char *) procName);
2586 f = (gl_function) _glapi_get_proc_address((const char *) procName);
2588 struct glx_context *gc = __glXGetCurrentContext();
2590 if (gc != NULL && gc->vtable->get_proc_address != NULL)
2591 f = gc->vtable->get_proc_address((const char *) procName);
2598 * Get the address of a named GL function. This is the GLX 1.4 name for
2599 * \c glXGetProcAddressARB.
2601 * \param procName Name of a GL or GLX function.
2602 * \returns A pointer to the named function
2604 * \sa glXGetProcAddressARB
2606 _X_EXPORT void (*glXGetProcAddress(const GLubyte * procName)) (void)
2607 #if defined(__GNUC__) && !defined(GLX_ALIAS_UNSUPPORTED)
2608 __attribute__ ((alias("glXGetProcAddressARB")));
2611 return glXGetProcAddressARB(procName);
2613 #endif /* __GNUC__ */
2616 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2618 * Get the unadjusted system time (UST). Currently, the UST is measured in
2619 * microseconds since Epoc. The actual resolution of the UST may vary from
2620 * system to system, and the units may vary from release to release.
2621 * Drivers should not call this function directly. They should instead use
2622 * \c glXGetProcAddress to obtain a pointer to the function.
2624 * \param ust Location to store the 64-bit UST
2625 * \returns Zero on success or a negative errno value on failure.
2627 * \sa glXGetProcAddress, PFNGLXGETUSTPROC
2629 * \since Internal API version 20030317.
2632 __glXGetUST(int64_t * ust)
2640 if (gettimeofday(&tv, NULL) == 0) {
2641 ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
2648 #endif /* GLX_DIRECT_RENDERING */