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"
40 #include "glx_error.h"
42 #ifdef GLX_DIRECT_RENDERING
43 #ifdef GLX_USE_APPLEGL
44 #include "apple_glx_context.h"
45 #include "apple_glx.h"
49 #include <X11/extensions/xf86vmode.h>
56 #include <X11/Xlib-xcb.h>
60 static const char __glXGLXClientVendorName[] = "Mesa Project and SGI";
61 static const char __glXGLXClientVersion[] = "1.4";
63 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
66 * Get the __DRIdrawable for the drawable associated with a GLXContext
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.
74 _X_HIDDEN __GLXDRIdrawable *
75 GetGLXDRIDrawable(Display * dpy, GLXDrawable drawable)
77 struct glx_display *priv = __glXInitialize(dpy);
78 __GLXDRIdrawable *pdraw;
83 if (__glxHashLookup(priv->drawHash, drawable, (void *) &pdraw) == 0)
91 _X_HIDDEN struct glx_drawable *
92 GetGLXDrawable(Display *dpy, GLXDrawable drawable)
94 struct glx_display *priv = __glXInitialize(dpy);
95 struct glx_drawable *glxDraw;
100 if (__glxHashLookup(priv->glXDrawHash, drawable, (void *) &glxDraw) == 0)
107 InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw, XID xDrawable,
108 GLXDrawable drawable)
110 struct glx_display *priv = __glXInitialize(dpy);
115 glxDraw->xDrawable = xDrawable;
116 glxDraw->drawable = drawable;
117 glxDraw->lastEventSbc = 0;
118 glxDraw->eventSbcWrap = 0;
120 return __glxHashInsert(priv->glXDrawHash, drawable, glxDraw);
124 DestroyGLXDrawable(Display *dpy, GLXDrawable drawable)
126 struct glx_display *priv = __glXInitialize(dpy);
127 struct glx_drawable *glxDraw;
132 glxDraw = GetGLXDrawable(dpy, drawable);
133 __glxHashDelete(priv->glXDrawHash, drawable);
138 * Get the GLX per-screen data structure associated with a GLX context.
140 * \param dpy Display for which the GLX per-screen information is to be
142 * \param scrn Screen on \c dpy for which the GLX per-screen information is
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.
147 * \todo Should this function validate that \c scrn is within the screen
148 * number range for \c dpy?
151 _X_HIDDEN struct glx_screen *
152 GetGLXScreenConfigs(Display * dpy, int scrn)
154 struct glx_display *const priv = __glXInitialize(dpy);
158 NULL) ? priv->screens[scrn] : NULL;
163 GetGLXPrivScreenConfig(Display * dpy, int scrn, struct glx_display ** ppriv,
164 struct glx_screen ** ppsc)
166 /* Initialize the extension, if needed . This has the added value
167 * of initializing/allocating the display private
171 return GLX_NO_EXTENSION;
174 *ppriv = __glXInitialize(dpy);
175 if (*ppriv == NULL) {
176 return GLX_NO_EXTENSION;
179 /* Check screen number to see if its valid */
180 if ((scrn < 0) || (scrn >= ScreenCount(dpy))) {
181 return GLX_BAD_SCREEN;
184 /* Check to see if the GL is supported on this screen */
185 *ppsc = (*ppriv)->screens[scrn];
186 if ((*ppsc)->configs == NULL) {
187 /* No support for GL on this screen regardless of visual */
188 return GLX_BAD_VISUAL;
196 * Determine if a \c GLXFBConfig supplied by the application is valid.
198 * \param dpy Application supplied \c Display pointer.
199 * \param config Application supplied \c GLXFBConfig.
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
205 static struct glx_config *
206 ValidateGLXFBConfig(Display * dpy, GLXFBConfig fbconfig)
208 struct glx_display *const priv = __glXInitialize(dpy);
209 int num_screens = ScreenCount(dpy);
211 struct glx_config *config;
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) {
228 glx_context_init(struct glx_context *gc,
229 struct glx_screen *psc, struct glx_config *config)
231 gc->majorOpcode = __glXSetupForCommand(psc->display->dpy);
232 if (!gc->majorOpcode)
235 gc->screen = psc->scr;
238 gc->isDirect = GL_TRUE;
239 gc->currentContextTag = -1;
246 * Create a new context.
248 * \param renderType For FBConfigs, what is the rendering type?
252 CreateContext(Display *dpy, int generic_id, struct glx_config *config,
253 GLXContext shareList_user, Bool allowDirect,
254 unsigned code, int renderType, int screen)
256 struct glx_context *gc;
257 struct glx_screen *psc;
258 struct glx_context *shareList = (struct glx_context *) shareList_user;
262 psc = GetGLXScreenConfigs(dpy, screen);
266 if (generic_id == None)
270 #ifdef GLX_USE_APPLEGL
271 gc = applegl_create_context(psc, config, shareList, renderType);
273 if (allowDirect && psc->vtable->create_context)
274 gc = psc->vtable->create_context(psc, config, shareList, renderType);
276 gc = indirect_create_context(psc, config, shareList, renderType);
283 case X_GLXCreateContext: {
284 xGLXCreateContextReq *req;
286 /* Send the glXCreateContext request */
287 GetReq(GLXCreateContext, req);
288 req->reqType = gc->majorOpcode;
289 req->glxCode = X_GLXCreateContext;
290 req->context = gc->xid = XAllocID(dpy);
291 req->visual = generic_id;
292 req->screen = screen;
293 req->shareList = shareList ? shareList->xid : None;
294 req->isDirect = gc->isDirect;
298 case X_GLXCreateNewContext: {
299 xGLXCreateNewContextReq *req;
301 /* Send the glXCreateNewContext request */
302 GetReq(GLXCreateNewContext, req);
303 req->reqType = gc->majorOpcode;
304 req->glxCode = X_GLXCreateNewContext;
305 req->context = gc->xid = XAllocID(dpy);
306 req->fbconfig = generic_id;
307 req->screen = screen;
308 req->renderType = renderType;
309 req->shareList = shareList ? shareList->xid : None;
310 req->isDirect = gc->isDirect;
314 case X_GLXvop_CreateContextWithConfigSGIX: {
315 xGLXVendorPrivateWithReplyReq *vpreq;
316 xGLXCreateContextWithConfigSGIXReq *req;
318 /* Send the glXCreateNewContext request */
319 GetReqExtra(GLXVendorPrivateWithReply,
320 sz_xGLXCreateContextWithConfigSGIXReq -
321 sz_xGLXVendorPrivateWithReplyReq, vpreq);
322 req = (xGLXCreateContextWithConfigSGIXReq *) vpreq;
323 req->reqType = gc->majorOpcode;
324 req->glxCode = X_GLXVendorPrivateWithReply;
325 req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX;
326 req->context = gc->xid = XAllocID(dpy);
327 req->fbconfig = generic_id;
328 req->screen = screen;
329 req->renderType = renderType;
330 req->shareList = shareList ? shareList->xid : None;
331 req->isDirect = gc->isDirect;
336 /* What to do here? This case is the sign of an internal error. It
337 * should never be reachable.
345 gc->share_xid = shareList ? shareList->xid : None;
346 gc->imported = GL_FALSE;
347 gc->renderType = renderType;
349 return (GLXContext) gc;
353 glXCreateContext(Display * dpy, XVisualInfo * vis,
354 GLXContext shareList, Bool allowDirect)
356 struct glx_config *config = NULL;
359 #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL)
360 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen);
362 config = glx_config_find_visual(psc->visuals, vis->visualid);
363 if (config == NULL) {
366 error.errorCode = BadValue;
367 error.resourceID = vis->visualid;
368 error.sequenceNumber = dpy->request;
369 error.type = X_Error;
370 error.majorCode = __glXSetupForCommand(dpy);
371 error.minorCode = X_GLXCreateContext;
372 _XError(dpy, &error);
376 renderType = config->rgbMode ? GLX_RGBA_TYPE : GLX_COLOR_INDEX_TYPE;
379 return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
380 X_GLXCreateContext, renderType, vis->screen);
384 glx_send_destroy_context(Display *dpy, XID xid)
386 CARD8 opcode = __glXSetupForCommand(dpy);
387 xGLXDestroyContextReq *req;
390 GetReq(GLXDestroyContext, req);
391 req->reqType = opcode;
392 req->glxCode = X_GLXDestroyContext;
399 ** Destroy the named context
403 glXDestroyContext(Display * dpy, GLXContext ctx)
405 struct glx_context *gc = (struct glx_context *) ctx;
407 if (gc == NULL || gc->xid == None)
412 glx_send_destroy_context(dpy, gc->xid);
414 if (gc->currentDpy) {
415 /* This context is bound to some thread. According to the man page,
416 * we should not actually delete the context until it's unbound.
417 * Note that we set gc->xid = None above. In MakeContextCurrent()
418 * we check for that and delete the context there.
422 gc->vtable->destroy(gc);
428 ** Return the major and minor version #s for the GLX extension
431 glXQueryVersion(Display * dpy, int *major, int *minor)
433 struct glx_display *priv;
435 /* Init the extension. This fetches the major and minor version. */
436 priv = __glXInitialize(dpy);
441 *major = priv->majorVersion;
443 *minor = priv->minorVersion;
448 ** Query the existance of the GLX extension
451 glXQueryExtension(Display * dpy, int *errorBase, int *eventBase)
453 int major_op, erb, evb;
456 rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
467 ** Put a barrier in the token stream that forces the GL to finish its
468 ** work before X can proceed.
473 struct glx_context *gc = __glXGetCurrentContext();
475 if (gc && gc->vtable->wait_gl)
476 gc->vtable->wait_gl(gc);
480 ** Put a barrier in the token stream that forces X to finish its
481 ** work before GL can proceed.
486 struct glx_context *gc = __glXGetCurrentContext();
488 if (gc && gc->vtable->wait_x)
489 gc->vtable->wait_x(gc);
493 glXUseXFont(Font font, int first, int count, int listBase)
495 struct glx_context *gc = __glXGetCurrentContext();
497 if (gc && gc->vtable->use_x_font)
498 gc->vtable->use_x_font(gc, font, first, count, listBase);
501 /************************************************************************/
504 ** Copy the source context to the destination context using the
508 glXCopyContext(Display * dpy, GLXContext source_user,
509 GLXContext dest_user, unsigned long mask)
511 struct glx_context *source = (struct glx_context *) source_user;
512 struct glx_context *dest = (struct glx_context *) dest_user;
513 #ifdef GLX_USE_APPLEGL
514 struct glx_context *gc = __glXGetCurrentContext();
518 if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext,
519 mask, &errorcode, &x11error)) {
520 __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error);
524 xGLXCopyContextReq *req;
525 struct glx_context *gc = __glXGetCurrentContext();
529 opcode = __glXSetupForCommand(dpy);
534 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
536 /* NOT_DONE: This does not work yet */
541 ** If the source is the current context, send its tag so that the context
542 ** can be flushed before the copy.
544 if (source == gc && dpy == gc->currentDpy) {
545 tag = gc->currentContextTag;
551 /* Send the glXCopyContext request */
553 GetReq(GLXCopyContext, req);
554 req->reqType = opcode;
555 req->glxCode = X_GLXCopyContext;
556 req->source = source ? source->xid : None;
557 req->dest = dest ? dest->xid : None;
559 req->contextTag = tag;
562 #endif /* GLX_USE_APPLEGL */
567 * Determine if a context uses direct rendering.
569 * \param dpy Display where the context was created.
570 * \param contextID ID of the context to be tested.
572 * \returns \c GL_TRUE if the context is direct rendering or not.
575 __glXIsDirect(Display * dpy, GLXContextID contextID)
579 opcode = __glXSetupForCommand(dpy);
584 xcb_connection_t *c = XGetXCBConnection(dpy);
585 xcb_generic_error_t *err;
586 xcb_glx_is_direct_reply_t *reply = xcb_glx_is_direct_reply(c,
591 const Bool is_direct = (reply != NULL && reply->is_direct) ? True : False;
594 __glXSendErrorForXcb(dpy, err);
605 * Shouldn't this function \b always return \c GL_FALSE when
606 * \c GLX_DIRECT_RENDERING is not defined? Do we really need to bother with
607 * the GLX protocol here at all?
610 glXIsDirect(Display * dpy, GLXContext gc_user)
612 struct glx_context *gc = (struct glx_context *) gc_user;
617 else if (gc->isDirect) {
620 #ifdef GLX_USE_APPLEGL /* TODO: indirect on darwin */
623 return __glXIsDirect(dpy, gc->xid);
628 glXCreateGLXPixmap(Display * dpy, XVisualInfo * vis, Pixmap pixmap)
630 #ifdef GLX_USE_APPLEGL
631 int screen = vis->screen;
632 struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen);
633 const struct glx_config *config;
635 config = glx_config_find_visual(psc->visuals, vis->visualid);
637 if(apple_glx_pixmap_create(dpy, vis->screen, pixmap, config))
642 xGLXCreateGLXPixmapReq *req;
643 struct glx_drawable *glxDraw;
647 opcode = __glXSetupForCommand(dpy);
652 glxDraw = malloc(sizeof(*glxDraw));
656 /* Send the glXCreateGLXPixmap request */
658 GetReq(GLXCreateGLXPixmap, req);
659 req->reqType = opcode;
660 req->glxCode = X_GLXCreateGLXPixmap;
661 req->screen = vis->screen;
662 req->visual = vis->visualid;
663 req->pixmap = pixmap;
664 req->glxpixmap = xid = XAllocID(dpy);
668 if (InitGLXDrawable(dpy, glxDraw, pixmap, req->glxpixmap)) {
673 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
675 /* FIXME: Maybe delay __DRIdrawable creation until the drawable
676 * is actually bound to a context... */
678 struct glx_display *const priv = __glXInitialize(dpy);
679 __GLXDRIdrawable *pdraw;
680 struct glx_screen *psc;
681 struct glx_config *config;
683 psc = priv->screens[vis->screen];
684 if (psc->driScreen == NULL)
687 config = glx_config_find_visual(psc->visuals, vis->visualid);
688 pdraw = psc->driScreen->createDrawable(psc, pixmap, xid, config);
690 fprintf(stderr, "failed to create pixmap\n");
695 if (__glxHashInsert(priv->drawHash, xid, pdraw)) {
696 (*pdraw->destroyDrawable) (pdraw);
703 xGLXDestroyGLXPixmapReq *dreq;
705 GetReq(GLXDestroyGLXPixmap, dreq);
706 dreq->reqType = opcode;
707 dreq->glxCode = X_GLXDestroyGLXPixmap;
708 dreq->glxpixmap = xid;
719 ** Destroy the named pixmap
722 glXDestroyGLXPixmap(Display * dpy, GLXPixmap glxpixmap)
724 #ifdef GLX_USE_APPLEGL
725 if(apple_glx_pixmap_destroy(dpy, glxpixmap))
726 __glXSendError(dpy, GLXBadPixmap, glxpixmap, X_GLXDestroyPixmap, false);
728 xGLXDestroyGLXPixmapReq *req;
731 opcode = __glXSetupForCommand(dpy);
736 /* Send the glXDestroyGLXPixmap request */
738 GetReq(GLXDestroyGLXPixmap, req);
739 req->reqType = opcode;
740 req->glxCode = X_GLXDestroyGLXPixmap;
741 req->glxpixmap = glxpixmap;
745 DestroyGLXDrawable(dpy, glxpixmap);
747 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
749 struct glx_display *const priv = __glXInitialize(dpy);
750 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, glxpixmap);
753 (*pdraw->destroyDrawable) (pdraw);
754 __glxHashDelete(priv->drawHash, glxpixmap);
758 #endif /* GLX_USE_APPLEGL */
762 glXSwapBuffers(Display * dpy, GLXDrawable drawable)
764 #ifdef GLX_USE_APPLEGL
765 struct glx_context * gc = __glXGetCurrentContext();
766 if(gc && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
767 apple_glx_swap_buffers(gc->driContext);
769 __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false);
772 struct glx_context *gc;
777 gc = __glXGetCurrentContext();
779 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
781 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
784 Bool flush = gc && drawable == gc->currentDrawable;
786 (*pdraw->psc->driScreen->swapBuffers)(pdraw, 0, 0, 0, flush);
792 opcode = __glXSetupForCommand(dpy);
798 ** The calling thread may or may not have a current context. If it
799 ** does, send the context tag so the server can do a flush.
801 if ((gc != NULL) && (dpy == gc->currentDpy) &&
802 ((drawable == gc->currentDrawable)
803 || (drawable == gc->currentReadable))) {
804 tag = gc->currentContextTag;
810 c = XGetXCBConnection(dpy);
811 xcb_glx_swap_buffers(c, tag, drawable);
813 #endif /* GLX_USE_APPLEGL */
818 ** Return configuration information for the given display, screen and
819 ** visual combination.
822 glXGetConfig(Display * dpy, XVisualInfo * vis, int attribute,
825 struct glx_display *priv;
826 struct glx_screen *psc;
827 struct glx_config *config;
830 status = GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc);
831 if (status == Success) {
832 config = glx_config_find_visual(psc->visuals, vis->visualid);
834 /* Lookup attribute after first finding a match on the visual */
835 if (config != NULL) {
836 return glx_config_get(config, attribute, value_return);
839 status = GLX_BAD_VISUAL;
843 ** If we can't find the config for this visual, this visual is not
844 ** supported by the OpenGL implementation on the server.
846 if ((status == GLX_BAD_VISUAL) && (attribute == GLX_USE_GL)) {
847 *value_return = GL_FALSE;
854 /************************************************************************/
857 init_fbconfig_for_chooser(struct glx_config * config,
858 GLboolean fbconfig_style_tags)
860 memset(config, 0, sizeof(struct glx_config));
861 config->visualID = (XID) GLX_DONT_CARE;
862 config->visualType = GLX_DONT_CARE;
864 /* glXChooseFBConfig specifies different defaults for these two than
867 if (fbconfig_style_tags) {
868 config->rgbMode = GL_TRUE;
869 config->doubleBufferMode = GLX_DONT_CARE;
872 config->visualRating = GLX_DONT_CARE;
873 config->transparentPixel = GLX_NONE;
874 config->transparentRed = GLX_DONT_CARE;
875 config->transparentGreen = GLX_DONT_CARE;
876 config->transparentBlue = GLX_DONT_CARE;
877 config->transparentAlpha = GLX_DONT_CARE;
878 config->transparentIndex = GLX_DONT_CARE;
880 config->drawableType = GLX_WINDOW_BIT;
882 (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
883 config->xRenderable = GLX_DONT_CARE;
884 config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
886 config->swapMethod = GLX_DONT_CARE;
889 #define MATCH_DONT_CARE( param ) \
891 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
892 && (a-> param != b-> param) ) { \
897 #define MATCH_MINIMUM( param ) \
899 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
900 && (a-> param > b-> param) ) { \
905 #define MATCH_EXACT( param ) \
907 if ( a-> param != b-> param) { \
912 /* Test that all bits from a are contained in b */
913 #define MATCH_MASK(param) \
915 if ( ((int) a-> param != (int) GLX_DONT_CARE) \
916 && ((a->param & ~b->param) != 0) ) { \
922 * Determine if two GLXFBConfigs are compatible.
924 * \param a Application specified config to test.
925 * \param b Server specified config to test against \c a.
928 fbconfigs_compatible(const struct glx_config * const a,
929 const struct glx_config * const b)
931 MATCH_DONT_CARE(doubleBufferMode);
932 MATCH_DONT_CARE(visualType);
933 MATCH_DONT_CARE(visualRating);
934 MATCH_DONT_CARE(xRenderable);
935 MATCH_DONT_CARE(fbconfigID);
936 MATCH_DONT_CARE(swapMethod);
938 MATCH_MINIMUM(rgbBits);
939 MATCH_MINIMUM(numAuxBuffers);
940 MATCH_MINIMUM(redBits);
941 MATCH_MINIMUM(greenBits);
942 MATCH_MINIMUM(blueBits);
943 MATCH_MINIMUM(alphaBits);
944 MATCH_MINIMUM(depthBits);
945 MATCH_MINIMUM(stencilBits);
946 MATCH_MINIMUM(accumRedBits);
947 MATCH_MINIMUM(accumGreenBits);
948 MATCH_MINIMUM(accumBlueBits);
949 MATCH_MINIMUM(accumAlphaBits);
950 MATCH_MINIMUM(sampleBuffers);
951 MATCH_MINIMUM(maxPbufferWidth);
952 MATCH_MINIMUM(maxPbufferHeight);
953 MATCH_MINIMUM(maxPbufferPixels);
954 MATCH_MINIMUM(samples);
956 MATCH_DONT_CARE(stereoMode);
959 MATCH_MASK(drawableType);
960 MATCH_MASK(renderType);
962 /* There is a bug in a few of the XFree86 DDX drivers. They contain
963 * visuals with a "transparent type" of 0 when they really mean GLX_NONE.
964 * Technically speaking, it is a bug in the DDX driver, but there is
965 * enough of an installed base to work around the problem here. In any
966 * case, 0 is not a valid value of the transparent type, so we'll treat 0
967 * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and
968 * 0 from the server to be a match to maintain backward compatibility with
969 * the (broken) drivers.
972 if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) {
973 if (a->transparentPixel == GLX_NONE) {
974 if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0)
978 MATCH_EXACT(transparentPixel);
981 switch (a->transparentPixel) {
982 case GLX_TRANSPARENT_RGB:
983 MATCH_DONT_CARE(transparentRed);
984 MATCH_DONT_CARE(transparentGreen);
985 MATCH_DONT_CARE(transparentBlue);
986 MATCH_DONT_CARE(transparentAlpha);
989 case GLX_TRANSPARENT_INDEX:
990 MATCH_DONT_CARE(transparentIndex);
1002 /* There's some trickly language in the GLX spec about how this is supposed
1003 * to work. Basically, if a given component size is either not specified
1004 * or the requested size is zero, it is supposed to act like PERFER_SMALLER.
1005 * Well, that's really hard to do with the code as-is. This behavior is
1006 * closer to correct, but still not technically right.
1008 #define PREFER_LARGER_OR_ZERO(comp) \
1010 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1011 if ( ((*a)-> comp) == 0 ) { \
1014 else if ( ((*b)-> comp) == 0 ) { \
1018 return ((*b)-> comp) - ((*a)-> comp) ; \
1023 #define PREFER_LARGER(comp) \
1025 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1026 return ((*b)-> comp) - ((*a)-> comp) ; \
1030 #define PREFER_SMALLER(comp) \
1032 if ( ((*a)-> comp) != ((*b)-> comp) ) { \
1033 return ((*a)-> comp) - ((*b)-> comp) ; \
1038 * Compare two GLXFBConfigs. This function is intended to be used as the
1039 * compare function passed in to qsort.
1041 * \returns If \c a is a "better" config, according to the specification of
1042 * SGIX_fbconfig, a number less than zero is returned. If \c b is
1043 * better, then a number greater than zero is return. If both are
1044 * equal, zero is returned.
1045 * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1048 fbconfig_compare(struct glx_config **a, struct glx_config **b)
1050 /* The order of these comparisons must NOT change. It is defined by
1051 * the GLX 1.3 spec and ARB_multisample.
1054 PREFER_SMALLER(visualSelectGroup);
1056 /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and
1057 * GLX_NON_CONFORMANT_CONFIG. It just so happens that this is the
1058 * numerical sort order of the enums (0x8000, 0x8001, and 0x800D).
1060 PREFER_SMALLER(visualRating);
1062 /* This isn't quite right. It is supposed to compare the sum of the
1063 * components the user specifically set minimums for.
1065 PREFER_LARGER_OR_ZERO(redBits);
1066 PREFER_LARGER_OR_ZERO(greenBits);
1067 PREFER_LARGER_OR_ZERO(blueBits);
1068 PREFER_LARGER_OR_ZERO(alphaBits);
1070 PREFER_SMALLER(rgbBits);
1072 if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) {
1073 /* Prefer single-buffer.
1075 return (!(*a)->doubleBufferMode) ? -1 : 1;
1078 PREFER_SMALLER(numAuxBuffers);
1080 PREFER_LARGER_OR_ZERO(depthBits);
1081 PREFER_SMALLER(stencilBits);
1083 /* This isn't quite right. It is supposed to compare the sum of the
1084 * components the user specifically set minimums for.
1086 PREFER_LARGER_OR_ZERO(accumRedBits);
1087 PREFER_LARGER_OR_ZERO(accumGreenBits);
1088 PREFER_LARGER_OR_ZERO(accumBlueBits);
1089 PREFER_LARGER_OR_ZERO(accumAlphaBits);
1091 PREFER_SMALLER(visualType);
1093 /* None of the multisample specs say where this comparison should happen,
1094 * so I put it near the end.
1096 PREFER_SMALLER(sampleBuffers);
1097 PREFER_SMALLER(samples);
1099 /* None of the pbuffer or fbconfig specs say that this comparison needs
1100 * to happen at all, but it seems like it should.
1102 PREFER_LARGER(maxPbufferWidth);
1103 PREFER_LARGER(maxPbufferHeight);
1104 PREFER_LARGER(maxPbufferPixels);
1111 * Selects and sorts a subset of the supplied configs based on the attributes.
1112 * This function forms to basis of \c glXChooseVisual, \c glXChooseFBConfig,
1113 * and \c glXChooseFBConfigSGIX.
1115 * \param configs Array of pointers to possible configs. The elements of
1116 * this array that do not meet the criteria will be set to
1117 * NULL. The remaining elements will be sorted according to
1118 * the various visual / FBConfig selection rules.
1119 * \param num_configs Number of elements in the \c configs array.
1120 * \param attribList Attributes used select from \c configs. This array is
1121 * terminated by a \c None tag. The array can either take
1122 * the form expected by \c glXChooseVisual (where boolean
1123 * tags do not have a value) or by \c glXChooseFBConfig
1124 * (where every tag has a value).
1125 * \param fbconfig_style_tags Selects whether \c attribList is in
1126 * \c glXChooseVisual style or
1127 * \c glXChooseFBConfig style.
1128 * \returns The number of valid elements left in \c configs.
1130 * \sa glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1133 choose_visual(struct glx_config ** configs, int num_configs,
1134 const int *attribList, GLboolean fbconfig_style_tags)
1136 struct glx_config test_config;
1140 /* This is a fairly direct implementation of the selection method
1141 * described by GLX_SGIX_fbconfig. Start by culling out all the
1142 * configs that are not compatible with the selected parameter
1146 init_fbconfig_for_chooser(&test_config, fbconfig_style_tags);
1147 __glXInitializeVisualConfigFromTags(&test_config, 512,
1148 (const INT32 *) attribList,
1149 GL_TRUE, fbconfig_style_tags);
1152 for (i = 0; i < num_configs; i++) {
1153 if (fbconfigs_compatible(&test_config, configs[i])) {
1154 configs[base] = configs[i];
1163 if (base < num_configs) {
1164 (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base));
1167 /* After the incompatible configs are removed, the resulting
1168 * list is sorted according to the rules set out in the various
1172 qsort(configs, base, sizeof(struct glx_config *),
1173 (int (*)(const void *, const void *)) fbconfig_compare);
1181 ** Return the visual that best matches the template. Return None if no
1182 ** visual matches the template.
1184 _X_EXPORT XVisualInfo *
1185 glXChooseVisual(Display * dpy, int screen, int *attribList)
1187 XVisualInfo *visualList = NULL;
1188 struct glx_display *priv;
1189 struct glx_screen *psc;
1190 struct glx_config test_config;
1191 struct glx_config *config;
1192 struct glx_config *best_config = NULL;
1195 ** Get a list of all visuals, return if list is empty
1197 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1203 ** Build a template from the defaults and the attribute list
1204 ** Free visual list and return if an unexpected token is encountered
1206 init_fbconfig_for_chooser(&test_config, GL_FALSE);
1207 __glXInitializeVisualConfigFromTags(&test_config, 512,
1208 (const INT32 *) attribList,
1212 ** Eliminate visuals that don't meet minimum requirements
1213 ** Compute a score for those that do
1214 ** Remember which visual, if any, got the highest score
1215 ** If no visual is acceptable, return None
1216 ** Otherwise, create an XVisualInfo list with just the selected X visual
1219 for (config = psc->visuals; config != NULL; config = config->next) {
1220 if (fbconfigs_compatible(&test_config, config)
1221 && ((best_config == NULL) ||
1222 (fbconfig_compare (&config, &best_config) < 0))) {
1223 XVisualInfo visualTemplate;
1224 XVisualInfo *newList;
1227 visualTemplate.screen = screen;
1228 visualTemplate.visualid = config->visualID;
1229 newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask,
1230 &visualTemplate, &i);
1234 visualList = newList;
1235 best_config = config;
1240 #ifdef GLX_USE_APPLEGL
1241 if(visualList && getenv("LIBGL_DUMP_VISUALID")) {
1242 printf("visualid 0x%lx\n", visualList[0].visualid);
1250 _X_EXPORT const char *
1251 glXQueryExtensionsString(Display * dpy, int screen)
1253 struct glx_screen *psc;
1254 struct glx_display *priv;
1256 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1260 if (!psc->effectiveGLXexts) {
1261 if (!psc->serverGLXexts) {
1262 psc->serverGLXexts =
1263 __glXQueryServerString(dpy, priv->majorOpcode, screen,
1267 __glXCalculateUsableExtensions(psc,
1268 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
1269 (psc->driScreen != NULL),
1273 priv->minorVersion);
1276 return psc->effectiveGLXexts;
1279 _X_EXPORT const char *
1280 glXGetClientString(Display * dpy, int name)
1286 return (__glXGLXClientVendorName);
1288 return (__glXGLXClientVersion);
1289 case GLX_EXTENSIONS:
1290 return (__glXGetClientExtensions());
1296 _X_EXPORT const char *
1297 glXQueryServerString(Display * dpy, int screen, int name)
1299 struct glx_screen *psc;
1300 struct glx_display *priv;
1304 if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1310 str = &priv->serverGLXvendor;
1313 str = &priv->serverGLXversion;
1315 case GLX_EXTENSIONS:
1316 str = &psc->serverGLXexts;
1323 *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
1330 __glXClientInfo(Display * dpy, int opcode)
1332 char *ext_str = __glXGetClientGLExtensionString();
1333 int size = strlen(ext_str) + 1;
1335 xcb_connection_t *c = XGetXCBConnection(dpy);
1336 xcb_glx_client_info(c,
1337 GLX_MAJOR_VERSION, GLX_MINOR_VERSION, size, ext_str);
1344 ** EXT_import_context
1348 glXGetCurrentDisplay(void)
1350 struct glx_context *gc = __glXGetCurrentContext();
1353 return gc->currentDpy;
1357 GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (),
1358 glXGetCurrentDisplay)
1360 #ifndef GLX_USE_APPLEGL
1361 _X_EXPORT GLXContext
1362 glXImportContextEXT(Display *dpy, GLXContextID contextID)
1364 struct glx_display *priv = __glXInitialize(dpy);
1365 struct glx_screen *psc = NULL;
1366 xGLXQueryContextReply reply;
1368 struct glx_context *ctx;
1370 /* This GLX implementation knows about 5 different properties, so
1371 * allow the server to send us one of each.
1373 int propList[5 * 2], *pProp, nPropListBytes;
1377 struct glx_config *mode;
1378 uint32_t fbconfigID = 0;
1379 uint32_t visualID = 0;
1380 uint32_t screen = 0;
1381 Bool got_screen = False;
1383 /* The GLX_EXT_import_context spec says:
1385 * "If <contextID> does not refer to a valid context, then a BadContext
1386 * error is generated; if <contextID> refers to direct rendering
1387 * context then no error is generated but glXImportContextEXT returns
1390 * If contextID is None, generate BadContext on the client-side. Other
1391 * sorts of invalid contexts will be detected by the server in the
1392 * __glXIsDirect call.
1394 if (contextID == None) {
1395 __glXSendError(dpy, GLXBadContext, contextID, X_GLXIsDirect, false);
1399 if (__glXIsDirect(dpy, contextID))
1402 opcode = __glXSetupForCommand(dpy);
1406 /* Send the glXQueryContextInfoEXT request */
1409 if (priv->majorVersion > 1 || priv->minorVersion >= 3) {
1410 xGLXQueryContextReq *req;
1412 GetReq(GLXQueryContext, req);
1414 req->reqType = opcode;
1415 req->glxCode = X_GLXQueryContext;
1416 req->context = contextID;
1419 xGLXVendorPrivateReq *vpreq;
1420 xGLXQueryContextInfoEXTReq *req;
1422 GetReqExtra(GLXVendorPrivate,
1423 sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq,
1425 req = (xGLXQueryContextInfoEXTReq *) vpreq;
1426 req->reqType = opcode;
1427 req->glxCode = X_GLXVendorPrivateWithReply;
1428 req->vendorCode = X_GLXvop_QueryContextInfoEXT;
1429 req->context = contextID;
1432 _XReply(dpy, (xReply *) & reply, 0, False);
1434 if (reply.n <= __GLX_MAX_CONTEXT_PROPS)
1435 nPropListBytes = reply.n * 2 * sizeof propList[0];
1438 _XRead(dpy, (char *) propList, nPropListBytes);
1442 numProps = nPropListBytes / (2 * sizeof(propList[0]));
1448 for (i = 0, pProp = propList; i < numProps; i++, pProp += 2)
1454 case GLX_SHARE_CONTEXT_EXT:
1457 case GLX_VISUAL_ID_EXT:
1458 visualID = pProp[1];
1460 case GLX_FBCONFIG_ID:
1461 fbconfigID = pProp[1];
1463 case GLX_RENDER_TYPE:
1464 renderType = pProp[1];
1471 psc = GetGLXScreenConfigs(dpy, screen);
1475 if (fbconfigID != 0) {
1476 mode = glx_config_find_fbconfig(psc->configs, fbconfigID);
1477 } else if (visualID != 0) {
1478 mode = glx_config_find_visual(psc->visuals, visualID);
1484 ctx = indirect_create_context(psc, mode, NULL, renderType);
1488 ctx->xid = contextID;
1489 ctx->imported = GL_TRUE;
1490 ctx->share_xid = share;
1492 return (GLXContext) ctx;
1498 glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value)
1500 struct glx_context *ctx = (struct glx_context *) ctx_user;
1502 switch (attribute) {
1503 case GLX_SHARE_CONTEXT_EXT:
1504 *value = ctx->share_xid;
1506 case GLX_VISUAL_ID_EXT:
1507 *value = ctx->config ? ctx->config->visualID : None;
1510 *value = ctx->screen;
1512 case GLX_FBCONFIG_ID:
1513 *value = ctx->config ? ctx->config->fbconfigID : None;
1515 case GLX_RENDER_TYPE:
1516 *value = ctx->renderType;
1519 return GLX_BAD_ATTRIBUTE;
1525 GLX_ALIAS(int, glXQueryContextInfoEXT,
1526 (Display * dpy, GLXContext ctx, int attribute, int *value),
1527 (dpy, ctx, attribute, value), glXQueryContext)
1529 _X_EXPORT GLXContextID glXGetContextIDEXT(const GLXContext ctx_user)
1531 struct glx_context *ctx = (struct glx_context *) ctx_user;
1533 return (ctx == NULL) ? None : ctx->xid;
1537 glXFreeContextEXT(Display *dpy, GLXContext ctx)
1539 struct glx_context *gc = (struct glx_context *) ctx;
1541 if (gc == NULL || gc->xid == None)
1544 /* The GLX_EXT_import_context spec says:
1546 * "glXFreeContext does not free the server-side context information or
1547 * the XID associated with the server-side context."
1549 * Don't send any protocol. Just destroy the client-side tracking of the
1550 * context. Also, only release the context structure if it's not current.
1553 if (gc->currentDpy) {
1556 gc->vtable->destroy(gc);
1561 _X_EXPORT GLXFBConfig *
1562 glXChooseFBConfig(Display * dpy, int screen,
1563 const int *attribList, int *nitems)
1565 struct glx_config **config_list;
1569 config_list = (struct glx_config **)
1570 glXGetFBConfigs(dpy, screen, &list_size);
1572 if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) {
1573 list_size = choose_visual(config_list, list_size, attribList, GL_TRUE);
1574 if (list_size == 0) {
1580 *nitems = list_size;
1581 return (GLXFBConfig *) config_list;
1585 _X_EXPORT GLXContext
1586 glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig,
1587 int renderType, GLXContext shareList, Bool allowDirect)
1589 struct glx_config *config = (struct glx_config *) fbconfig;
1591 return CreateContext(dpy, config->fbconfigID, config, shareList,
1592 allowDirect, X_GLXCreateNewContext, renderType,
1597 _X_EXPORT GLXDrawable
1598 glXGetCurrentReadDrawable(void)
1600 struct glx_context *gc = __glXGetCurrentContext();
1602 return gc->currentReadable;
1606 _X_EXPORT GLXFBConfig *
1607 glXGetFBConfigs(Display * dpy, int screen, int *nelements)
1609 struct glx_display *priv = __glXInitialize(dpy);
1610 struct glx_config **config_list = NULL;
1611 struct glx_config *config;
1612 unsigned num_configs = 0;
1616 if (priv && (priv->screens != NULL)
1617 && (screen >= 0) && (screen <= ScreenCount(dpy))
1618 && (priv->screens[screen]->configs != NULL)
1619 && (priv->screens[screen]->configs->fbconfigID
1620 != (int) GLX_DONT_CARE)) {
1622 for (config = priv->screens[screen]->configs; config != NULL;
1623 config = config->next) {
1624 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1629 config_list = malloc(num_configs * sizeof *config_list);
1630 if (config_list != NULL) {
1631 *nelements = num_configs;
1633 for (config = priv->screens[screen]->configs; config != NULL;
1634 config = config->next) {
1635 if (config->fbconfigID != (int) GLX_DONT_CARE) {
1636 config_list[i] = config;
1643 return (GLXFBConfig *) config_list;
1648 glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig,
1649 int attribute, int *value)
1651 struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig);
1654 return GLXBadFBConfig;
1656 return glx_config_get(config, attribute, value);
1660 _X_EXPORT XVisualInfo *
1661 glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig)
1663 XVisualInfo visualTemplate;
1664 struct glx_config *config = (struct glx_config *) fbconfig;
1668 ** Get a list of all visuals, return if list is empty
1670 visualTemplate.visualid = config->visualID;
1671 return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count);
1674 #ifndef GLX_USE_APPLEGL
1676 ** GLX_SGI_swap_control
1679 __glXSwapIntervalSGI(int interval)
1681 xGLXVendorPrivateReq *req;
1682 struct glx_context *gc = __glXGetCurrentContext();
1683 struct glx_screen *psc;
1685 CARD32 *interval_ptr;
1689 return GLX_BAD_CONTEXT;
1692 if (interval <= 0) {
1693 return GLX_BAD_VALUE;
1696 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1698 #ifdef GLX_DIRECT_RENDERING
1699 if (gc->isDirect && psc->driScreen && psc->driScreen->setSwapInterval) {
1700 __GLXDRIdrawable *pdraw =
1701 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1702 psc->driScreen->setSwapInterval(pdraw, interval);
1707 dpy = gc->currentDpy;
1708 opcode = __glXSetupForCommand(dpy);
1713 /* Send the glXSwapIntervalSGI request */
1715 GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req);
1716 req->reqType = opcode;
1717 req->glxCode = X_GLXVendorPrivate;
1718 req->vendorCode = X_GLXvop_SwapIntervalSGI;
1719 req->contextTag = gc->currentContextTag;
1721 interval_ptr = (CARD32 *) (req + 1);
1722 *interval_ptr = interval;
1733 ** GLX_MESA_swap_control
1736 __glXSwapIntervalMESA(unsigned int interval)
1738 #ifdef GLX_DIRECT_RENDERING
1739 struct glx_context *gc = __glXGetCurrentContext();
1741 if (gc != NULL && gc->isDirect) {
1742 struct glx_screen *psc;
1744 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1745 if (psc->driScreen && psc->driScreen->setSwapInterval) {
1746 __GLXDRIdrawable *pdraw =
1747 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1748 return psc->driScreen->setSwapInterval(pdraw, interval);
1753 return GLX_BAD_CONTEXT;
1758 __glXGetSwapIntervalMESA(void)
1760 #ifdef GLX_DIRECT_RENDERING
1761 struct glx_context *gc = __glXGetCurrentContext();
1763 if (gc != NULL && gc->isDirect) {
1764 struct glx_screen *psc;
1766 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1767 if (psc->driScreen && psc->driScreen->getSwapInterval) {
1768 __GLXDRIdrawable *pdraw =
1769 GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1770 return psc->driScreen->getSwapInterval(pdraw);
1780 ** GLX_SGI_video_sync
1783 __glXGetVideoSyncSGI(unsigned int *count)
1785 int64_t ust, msc, sbc;
1787 struct glx_context *gc = __glXGetCurrentContext();
1788 struct glx_screen *psc;
1789 #ifdef GLX_DIRECT_RENDERING
1790 __GLXDRIdrawable *pdraw;
1794 return GLX_BAD_CONTEXT;
1796 #ifdef GLX_DIRECT_RENDERING
1798 return GLX_BAD_CONTEXT;
1801 psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen);
1802 #ifdef GLX_DIRECT_RENDERING
1803 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1806 /* FIXME: Looking at the GLX_SGI_video_sync spec in the extension registry,
1807 * FIXME: there should be a GLX encoding for this call. I can find no
1808 * FIXME: documentation for the GLX encoding.
1810 #ifdef GLX_DIRECT_RENDERING
1811 if (psc->driScreen && psc->driScreen->getDrawableMSC) {
1812 ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc);
1813 *count = (unsigned) msc;
1814 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1818 return GLX_BAD_CONTEXT;
1822 __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
1824 struct glx_context *gc = __glXGetCurrentContext();
1825 struct glx_screen *psc;
1826 #ifdef GLX_DIRECT_RENDERING
1827 __GLXDRIdrawable *pdraw;
1829 int64_t ust, msc, sbc;
1832 if (divisor <= 0 || remainder < 0)
1833 return GLX_BAD_VALUE;
1836 return GLX_BAD_CONTEXT;
1838 #ifdef GLX_DIRECT_RENDERING
1840 return GLX_BAD_CONTEXT;
1843 psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1844 #ifdef GLX_DIRECT_RENDERING
1845 pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1848 #ifdef GLX_DIRECT_RENDERING
1849 if (psc->driScreen && psc->driScreen->waitForMSC) {
1850 ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc,
1852 *count = (unsigned) msc;
1853 return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1857 return GLX_BAD_CONTEXT;
1860 #endif /* GLX_USE_APPLEGL */
1863 ** GLX_SGIX_fbconfig
1864 ** Many of these functions are aliased to GLX 1.3 entry points in the
1865 ** GLX_functions table.
1869 GLX_ALIAS(int, glXGetFBConfigAttribSGIX,
1870 (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value),
1871 (dpy, config, attribute, value), glXGetFBConfigAttrib)
1873 _X_EXPORT GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX,
1874 (Display * dpy, int screen, int *attrib_list,
1875 int *nelements), (dpy, screen, attrib_list, nelements),
1878 _X_EXPORT GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX,
1879 (Display * dpy, GLXFBConfigSGIX config),
1880 (dpy, config), glXGetVisualFromFBConfig)
1883 glXCreateGLXPixmapWithConfigSGIX(Display * dpy,
1884 GLXFBConfigSGIX fbconfig,
1887 #ifndef GLX_USE_APPLEGL
1888 xGLXVendorPrivateWithReplyReq *vpreq;
1889 xGLXCreateGLXPixmapWithConfigSGIXReq *req;
1890 GLXPixmap xid = None;
1892 struct glx_screen *psc;
1894 struct glx_config *config = (struct glx_config *) fbconfig;
1897 if ((dpy == NULL) || (config == NULL)) {
1900 #ifdef GLX_USE_APPLEGL
1901 if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config))
1906 psc = GetGLXScreenConfigs(dpy, config->screen);
1908 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1909 opcode = __glXSetupForCommand(dpy);
1914 /* Send the glXCreateGLXPixmapWithConfigSGIX request */
1916 GetReqExtra(GLXVendorPrivateWithReply,
1917 sz_xGLXCreateGLXPixmapWithConfigSGIXReq -
1918 sz_xGLXVendorPrivateWithReplyReq, vpreq);
1919 req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq;
1920 req->reqType = opcode;
1921 req->glxCode = X_GLXVendorPrivateWithReply;
1922 req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX;
1923 req->screen = config->screen;
1924 req->fbconfig = config->fbconfigID;
1925 req->pixmap = pixmap;
1926 req->glxpixmap = xid = XAllocID(dpy);
1935 _X_EXPORT GLXContext
1936 glXCreateContextWithConfigSGIX(Display * dpy,
1937 GLXFBConfigSGIX fbconfig, int renderType,
1938 GLXContext shareList, Bool allowDirect)
1940 GLXContext gc = NULL;
1941 struct glx_config *config = (struct glx_config *) fbconfig;
1942 struct glx_screen *psc;
1945 if ((dpy == NULL) || (config == NULL)) {
1949 psc = GetGLXScreenConfigs(dpy, config->screen);
1951 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1952 gc = CreateContext(dpy, config->fbconfigID, config, shareList,
1954 X_GLXvop_CreateContextWithConfigSGIX, renderType,
1962 _X_EXPORT GLXFBConfigSGIX
1963 glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis)
1965 struct glx_display *priv;
1966 struct glx_screen *psc = NULL;
1968 if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success)
1969 && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)
1970 && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) {
1971 return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs,
1978 #ifndef GLX_USE_APPLEGL
1980 ** GLX_SGIX_swap_group
1983 __glXJoinSwapGroupSGIX(Display * dpy, GLXDrawable drawable,
1993 ** GLX_SGIX_swap_barrier
1996 __glXBindSwapBarrierSGIX(Display * dpy, GLXDrawable drawable, int barrier)
2004 __glXQueryMaxSwapBarriersSGIX(Display * dpy, int screen, int *max)
2014 ** GLX_OML_sync_control
2017 __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable,
2018 int64_t * ust, int64_t * msc, int64_t * sbc)
2020 struct glx_display * const priv = __glXInitialize(dpy);
2022 #ifdef GLX_DIRECT_RENDERING
2023 __GLXDRIdrawable *pdraw;
2025 struct glx_screen *psc;
2030 #ifdef GLX_DIRECT_RENDERING
2031 pdraw = GetGLXDRIDrawable(dpy, drawable);
2032 psc = pdraw ? pdraw->psc : NULL;
2033 if (pdraw && psc->driScreen->getDrawableMSC) {
2034 ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc);
2042 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2044 __glxGetMscRate(__GLXDRIdrawable *glxDraw,
2045 int32_t * numerator, int32_t * denominator)
2048 struct glx_screen *psc;
2049 XF86VidModeModeLine mode_line;
2054 if (XF86VidModeQueryVersion(psc->dpy, &i, &i) &&
2055 XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) {
2056 unsigned n = dot_clock * 1000;
2057 unsigned d = mode_line.vtotal * mode_line.htotal;
2059 # define V_INTERLACE 0x010
2060 # define V_DBLSCAN 0x020
2062 if (mode_line.flags & V_INTERLACE)
2064 else if (mode_line.flags & V_DBLSCAN)
2067 /* The OML_sync_control spec requires that if the refresh rate is a
2068 * whole number, that the returned numerator be equal to the refresh
2069 * rate and the denominator be 1.
2077 static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 };
2079 /* This is a poor man's way to reduce a fraction. It's far from
2080 * perfect, but it will work well enough for this situation.
2083 for (i = 0; f[i] != 0; i++) {
2084 while (n % f[i] == 0 && d % f[i] == 0) {
2104 * Determine the refresh rate of the specified drawable and display.
2106 * \param dpy Display whose refresh rate is to be determined.
2107 * \param drawable Drawable whose refresh rate is to be determined.
2108 * \param numerator Numerator of the refresh rate.
2109 * \param demoninator Denominator of the refresh rate.
2110 * \return If the refresh rate for the specified display and drawable could
2111 * be calculated, True is returned. Otherwise False is returned.
2113 * \note This function is implemented entirely client-side. A lot of other
2114 * functionality is required to export GLX_OML_sync_control, so on
2115 * XFree86 this function can be called for direct-rendering contexts
2116 * when GLX_OML_sync_control appears in the client extension string.
2120 __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
2121 int32_t * numerator, int32_t * denominator)
2123 #if defined( GLX_DIRECT_RENDERING ) && defined( XF86VIDMODE )
2124 __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable);
2129 return __glxGetMscRate(draw, numerator, denominator);
2141 __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable,
2142 int64_t target_msc, int64_t divisor, int64_t remainder)
2144 struct glx_context *gc = __glXGetCurrentContext();
2145 #ifdef GLX_DIRECT_RENDERING
2146 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2147 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2150 if (!gc) /* no GLX for this */
2153 #ifdef GLX_DIRECT_RENDERING
2154 if (!pdraw || !gc->isDirect)
2158 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2159 * error", but it also says "It [glXSwapBuffersMscOML] will return a value
2160 * of -1 if the function failed because of errors detected in the input
2163 if (divisor < 0 || remainder < 0 || target_msc < 0)
2165 if (divisor > 0 && remainder >= divisor)
2168 if (target_msc == 0 && divisor == 0 && remainder == 0)
2171 #ifdef GLX_DIRECT_RENDERING
2172 if (psc->driScreen && psc->driScreen->swapBuffers)
2173 return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor,
2182 __glXWaitForMscOML(Display * dpy, GLXDrawable drawable,
2183 int64_t target_msc, int64_t divisor,
2184 int64_t remainder, int64_t * ust,
2185 int64_t * msc, int64_t * sbc)
2187 #ifdef GLX_DIRECT_RENDERING
2188 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2189 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2194 /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2195 * error", but the return type in the spec is Bool.
2197 if (divisor < 0 || remainder < 0 || target_msc < 0)
2199 if (divisor > 0 && remainder >= divisor)
2202 #ifdef GLX_DIRECT_RENDERING
2203 if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) {
2204 ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder,
2215 __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable,
2216 int64_t target_sbc, int64_t * ust,
2217 int64_t * msc, int64_t * sbc)
2219 #ifdef GLX_DIRECT_RENDERING
2220 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2221 struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2225 /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE
2226 * error", but the return type in the spec is Bool.
2231 #ifdef GLX_DIRECT_RENDERING
2232 if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) {
2233 ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc);
2245 * Mesa extension stubs. These will help reduce portability problems.
2250 * Release all buffers associated with the specified GLX drawable.
2253 * This function was intended for stand-alone Mesa. The issue there is that
2254 * the library doesn't get any notification when a window is closed. In
2255 * DRI there is a similar but slightly different issue. When GLX 1.3 is
2256 * supported, there are 3 different functions to destroy a drawable. It
2257 * should be possible to create GLX protocol (or have it determine which
2258 * protocol to use based on the type of the drawable) to have one function
2259 * do the work of 3. For the direct-rendering case, this function could
2260 * just call the driver's \c __DRIdrawableRec::destroyDrawable function.
2261 * This would reduce the frequency with which \c __driGarbageCollectDrawables
2262 * would need to be used. This really should be done as part of the new DRI
2265 * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt
2266 * __driGarbageCollectDrawables
2267 * glXDestroyGLXPixmap
2268 * glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow
2269 * glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX
2272 __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d)
2281 glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual,
2282 Pixmap pixmap, Colormap cmap)
2295 * GLX_MESA_copy_sub_buffer
2297 #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */
2299 __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable,
2300 int x, int y, int width, int height)
2302 xGLXVendorPrivateReq *req;
2303 struct glx_context *gc;
2305 CARD32 *drawable_ptr;
2306 INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr;
2309 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2310 __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2311 if (pdraw != NULL) {
2312 struct glx_screen *psc = pdraw->psc;
2313 if (psc->driScreen->copySubBuffer != NULL) {
2314 (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height, True);
2321 opcode = __glXSetupForCommand(dpy);
2326 ** The calling thread may or may not have a current context. If it
2327 ** does, send the context tag so the server can do a flush.
2329 gc = __glXGetCurrentContext();
2330 if ((gc != NULL) && (dpy == gc->currentDpy) &&
2331 ((drawable == gc->currentDrawable) ||
2332 (drawable == gc->currentReadable))) {
2333 tag = gc->currentContextTag;
2340 GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req);
2341 req->reqType = opcode;
2342 req->glxCode = X_GLXVendorPrivate;
2343 req->vendorCode = X_GLXvop_CopySubBufferMESA;
2344 req->contextTag = tag;
2346 drawable_ptr = (CARD32 *) (req + 1);
2347 x_ptr = (INT32 *) (drawable_ptr + 1);
2348 y_ptr = (INT32 *) (drawable_ptr + 2);
2349 w_ptr = (INT32 *) (drawable_ptr + 3);
2350 h_ptr = (INT32 *) (drawable_ptr + 4);
2352 *drawable_ptr = drawable;
2364 __glXBindTexImageEXT(Display * dpy,
2365 GLXDrawable drawable, int buffer, const int *attrib_list)
2367 struct glx_context *gc = __glXGetCurrentContext();
2369 if (gc == NULL || gc->vtable->bind_tex_image == NULL)
2372 gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list);
2376 __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer)
2378 struct glx_context *gc = __glXGetCurrentContext();
2380 if (gc == NULL || gc->vtable->release_tex_image == NULL)
2383 gc->vtable->release_tex_image(dpy, drawable, buffer);
2388 #endif /* GLX_USE_APPLEGL */
2391 * \c strdup is actually not a standard ANSI C or POSIX routine.
2392 * Irix will not define it if ANSI mode is in effect.
2397 __glXstrdup(const char *str)
2400 copy = malloc(strlen(str) + 1);
2408 ** glXGetProcAddress support
2411 struct name_address_pair
2417 #define GLX_FUNCTION(f) { # f, (GLvoid *) f }
2418 #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f }
2420 static const struct name_address_pair GLX_functions[] = {
2421 /*** GLX_VERSION_1_0 ***/
2422 GLX_FUNCTION(glXChooseVisual),
2423 GLX_FUNCTION(glXCopyContext),
2424 GLX_FUNCTION(glXCreateContext),
2425 GLX_FUNCTION(glXCreateGLXPixmap),
2426 GLX_FUNCTION(glXDestroyContext),
2427 GLX_FUNCTION(glXDestroyGLXPixmap),
2428 GLX_FUNCTION(glXGetConfig),
2429 GLX_FUNCTION(glXGetCurrentContext),
2430 GLX_FUNCTION(glXGetCurrentDrawable),
2431 GLX_FUNCTION(glXIsDirect),
2432 GLX_FUNCTION(glXMakeCurrent),
2433 GLX_FUNCTION(glXQueryExtension),
2434 GLX_FUNCTION(glXQueryVersion),
2435 GLX_FUNCTION(glXSwapBuffers),
2436 GLX_FUNCTION(glXUseXFont),
2437 GLX_FUNCTION(glXWaitGL),
2438 GLX_FUNCTION(glXWaitX),
2440 /*** GLX_VERSION_1_1 ***/
2441 GLX_FUNCTION(glXGetClientString),
2442 GLX_FUNCTION(glXQueryExtensionsString),
2443 GLX_FUNCTION(glXQueryServerString),
2445 /*** GLX_VERSION_1_2 ***/
2446 GLX_FUNCTION(glXGetCurrentDisplay),
2448 /*** GLX_VERSION_1_3 ***/
2449 GLX_FUNCTION(glXChooseFBConfig),
2450 GLX_FUNCTION(glXCreateNewContext),
2451 GLX_FUNCTION(glXCreatePbuffer),
2452 GLX_FUNCTION(glXCreatePixmap),
2453 GLX_FUNCTION(glXCreateWindow),
2454 GLX_FUNCTION(glXDestroyPbuffer),
2455 GLX_FUNCTION(glXDestroyPixmap),
2456 GLX_FUNCTION(glXDestroyWindow),
2457 GLX_FUNCTION(glXGetCurrentReadDrawable),
2458 GLX_FUNCTION(glXGetFBConfigAttrib),
2459 GLX_FUNCTION(glXGetFBConfigs),
2460 GLX_FUNCTION(glXGetSelectedEvent),
2461 GLX_FUNCTION(glXGetVisualFromFBConfig),
2462 GLX_FUNCTION(glXMakeContextCurrent),
2463 GLX_FUNCTION(glXQueryContext),
2464 GLX_FUNCTION(glXQueryDrawable),
2465 GLX_FUNCTION(glXSelectEvent),
2467 #ifndef GLX_USE_APPLEGL
2468 /*** GLX_SGI_swap_control ***/
2469 GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI),
2471 /*** GLX_SGI_video_sync ***/
2472 GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI),
2473 GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI),
2475 /*** GLX_SGI_make_current_read ***/
2476 GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent),
2477 GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable),
2479 /*** GLX_EXT_import_context ***/
2480 GLX_FUNCTION(glXFreeContextEXT),
2481 GLX_FUNCTION(glXGetContextIDEXT),
2482 GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay),
2483 GLX_FUNCTION(glXImportContextEXT),
2484 GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext),
2487 /*** GLX_SGIX_fbconfig ***/
2488 GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib),
2489 GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig),
2490 GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX),
2491 GLX_FUNCTION(glXCreateContextWithConfigSGIX),
2492 GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig),
2493 GLX_FUNCTION(glXGetFBConfigFromVisualSGIX),
2495 #ifndef GLX_USE_APPLEGL
2496 /*** GLX_SGIX_pbuffer ***/
2497 GLX_FUNCTION(glXCreateGLXPbufferSGIX),
2498 GLX_FUNCTION(glXDestroyGLXPbufferSGIX),
2499 GLX_FUNCTION(glXQueryGLXPbufferSGIX),
2500 GLX_FUNCTION(glXSelectEventSGIX),
2501 GLX_FUNCTION(glXGetSelectedEventSGIX),
2503 /*** GLX_SGIX_swap_group ***/
2504 GLX_FUNCTION2(glXJoinSwapGroupSGIX, __glXJoinSwapGroupSGIX),
2506 /*** GLX_SGIX_swap_barrier ***/
2507 GLX_FUNCTION2(glXBindSwapBarrierSGIX, __glXBindSwapBarrierSGIX),
2508 GLX_FUNCTION2(glXQueryMaxSwapBarriersSGIX, __glXQueryMaxSwapBarriersSGIX),
2510 /*** GLX_MESA_copy_sub_buffer ***/
2511 GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA),
2513 /*** GLX_MESA_pixmap_colormap ***/
2514 GLX_FUNCTION(glXCreateGLXPixmapMESA),
2516 /*** GLX_MESA_release_buffers ***/
2517 GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA),
2519 /*** GLX_MESA_swap_control ***/
2520 GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA),
2521 GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA),
2524 /*** GLX_ARB_get_proc_address ***/
2525 GLX_FUNCTION(glXGetProcAddressARB),
2528 GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB),
2530 #ifndef GLX_USE_APPLEGL
2531 /*** GLX_OML_sync_control ***/
2532 GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML),
2533 GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML),
2534 GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML),
2535 GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML),
2536 GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML),
2538 /*** GLX_EXT_texture_from_pixmap ***/
2539 GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT),
2540 GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT),
2543 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2544 /*** DRI configuration ***/
2545 GLX_FUNCTION(glXGetScreenDriver),
2546 GLX_FUNCTION(glXGetDriverConfig),
2549 /*** GLX_ARB_create_context and GLX_ARB_create_context_profile ***/
2550 GLX_FUNCTION(glXCreateContextAttribsARB),
2552 {NULL, NULL} /* end of list */
2555 static const GLvoid *
2556 get_glx_proc_address(const char *funcName)
2560 /* try static functions */
2561 for (i = 0; GLX_functions[i].Name; i++) {
2562 if (strcmp(GLX_functions[i].Name, funcName) == 0)
2563 return GLX_functions[i].Address;
2570 * Get the address of a named GL function. This is the pre-GLX 1.4 name for
2571 * \c glXGetProcAddress.
2573 * \param procName Name of a GL or GLX function.
2574 * \returns A pointer to the named function
2576 * \sa glXGetProcAddress
2578 _X_EXPORT void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
2580 typedef void (*gl_function) (void);
2584 /* Search the table of GLX and internal functions first. If that
2585 * fails and the supplied name could be a valid core GL name, try
2586 * searching the core GL function table. This check is done to prevent
2587 * DRI based drivers from searching the core GL function table for
2588 * internal API functions.
2590 f = (gl_function) get_glx_proc_address((const char *) procName);
2591 if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l')
2592 && (procName[2] != 'X')) {
2593 #ifdef GLX_SHARED_GLAPI
2594 f = (gl_function) __indirect_get_proc_address((const char *) procName);
2597 f = (gl_function) _glapi_get_proc_address((const char *) procName);
2599 struct glx_context *gc = __glXGetCurrentContext();
2601 if (gc != NULL && gc->vtable->get_proc_address != NULL)
2602 f = gc->vtable->get_proc_address((const char *) procName);
2609 * Get the address of a named GL function. This is the GLX 1.4 name for
2610 * \c glXGetProcAddressARB.
2612 * \param procName Name of a GL or GLX function.
2613 * \returns A pointer to the named function
2615 * \sa glXGetProcAddressARB
2617 _X_EXPORT void (*glXGetProcAddress(const GLubyte * procName)) (void)
2618 #if defined(__GNUC__) && !defined(GLX_ALIAS_UNSUPPORTED)
2619 __attribute__ ((alias("glXGetProcAddressARB")));
2622 return glXGetProcAddressARB(procName);
2624 #endif /* __GNUC__ */
2627 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2629 * Get the unadjusted system time (UST). Currently, the UST is measured in
2630 * microseconds since Epoc. The actual resolution of the UST may vary from
2631 * system to system, and the units may vary from release to release.
2632 * Drivers should not call this function directly. They should instead use
2633 * \c glXGetProcAddress to obtain a pointer to the function.
2635 * \param ust Location to store the 64-bit UST
2636 * \returns Zero on success or a negative errno value on failure.
2638 * \sa glXGetProcAddress, PFNGLXGETUSTPROC
2640 * \since Internal API version 20030317.
2643 __glXGetUST(int64_t * ust)
2651 if (gettimeofday(&tv, NULL) == 0) {
2652 ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
2659 #endif /* GLX_DIRECT_RENDERING */