/* * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice including the dates of first publication and * either this permission notice or a reference to * http://oss.sgi.com/projects/FreeB/ * shall be included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Except as contained in this notice, the name of Silicon Graphics, Inc. * shall not be used in advertising or otherwise to promote the sale, use or * other dealings in this Software without prior written authorization from * Silicon Graphics, Inc. */ /** * \file glxcmds.c * Client-side GLX interface. */ #include "glxclient.h" #include "glapi.h" #include "glxextensions.h" #include "indirect.h" #ifdef GLX_DIRECT_RENDERING #ifdef GLX_USE_APPLEGL #include "apple_glx_context.h" #include "apple_glx.h" #include "glx_error.h" #else #include #ifdef XF86VIDMODE #include #endif #include "xf86dri.h" #endif #else #endif #if defined(USE_XCB) #include #include #include #endif static const char __glXGLXClientVendorName[] = "Mesa Project and SGI"; static const char __glXGLXClientVersion[] = "1.4"; #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) /** * Get the __DRIdrawable for the drawable associated with a GLXContext * * \param dpy The display associated with \c drawable. * \param drawable GLXDrawable whose __DRIdrawable part is to be retrieved. * \param scrn_num If non-NULL, the drawables screen is stored there * \returns A pointer to the context's __DRIdrawable on success, or NULL if * the drawable is not associated with a direct-rendering context. */ _X_HIDDEN __GLXDRIdrawable * GetGLXDRIDrawable(Display * dpy, GLXDrawable drawable) { struct glx_display *priv = __glXInitialize(dpy); __GLXDRIdrawable *pdraw; if (priv == NULL) return NULL; if (__glxHashLookup(priv->drawHash, drawable, (void *) &pdraw) == 0) return pdraw; return NULL; } #endif _X_HIDDEN struct glx_drawable * GetGLXDrawable(Display *dpy, GLXDrawable drawable) { struct glx_display *priv = __glXInitialize(dpy); struct glx_drawable *glxDraw; if (priv == NULL) return NULL; if (__glxHashLookup(priv->glXDrawHash, drawable, (void *) &glxDraw) == 0) return glxDraw; return NULL; } _X_HIDDEN int InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw, XID xDrawable, GLXDrawable drawable) { struct glx_display *priv = __glXInitialize(dpy); if (!priv) return -1; glxDraw->xDrawable = xDrawable; glxDraw->drawable = drawable; glxDraw->lastEventSbc = 0; glxDraw->eventSbcWrap = 0; return __glxHashInsert(priv->glXDrawHash, drawable, glxDraw); } _X_HIDDEN void DestroyGLXDrawable(Display *dpy, GLXDrawable drawable) { struct glx_display *priv = __glXInitialize(dpy); struct glx_drawable *glxDraw; if (!priv) return; glxDraw = GetGLXDrawable(dpy, drawable); __glxHashDelete(priv->glXDrawHash, drawable); free(glxDraw); } /** * Get the GLX per-screen data structure associated with a GLX context. * * \param dpy Display for which the GLX per-screen information is to be * retrieved. * \param scrn Screen on \c dpy for which the GLX per-screen information is * to be retrieved. * \returns A pointer to the GLX per-screen data if \c dpy and \c scrn * specify a valid GLX screen, or NULL otherwise. * * \todo Should this function validate that \c scrn is within the screen * number range for \c dpy? */ static struct glx_screen * GetGLXScreenConfigs(Display * dpy, int scrn) { struct glx_display *const priv = __glXInitialize(dpy); return (priv && priv->screens != NULL) ? priv->screens[scrn] : NULL; } static int GetGLXPrivScreenConfig(Display * dpy, int scrn, struct glx_display ** ppriv, struct glx_screen ** ppsc) { /* Initialize the extension, if needed . This has the added value * of initializing/allocating the display private */ if (dpy == NULL) { return GLX_NO_EXTENSION; } *ppriv = __glXInitialize(dpy); if (*ppriv == NULL) { return GLX_NO_EXTENSION; } /* Check screen number to see if its valid */ if ((scrn < 0) || (scrn >= ScreenCount(dpy))) { return GLX_BAD_SCREEN; } /* Check to see if the GL is supported on this screen */ *ppsc = (*ppriv)->screens[scrn]; if ((*ppsc)->configs == NULL) { /* No support for GL on this screen regardless of visual */ return GLX_BAD_VISUAL; } return Success; } /** * Determine if a \c GLXFBConfig supplied by the application is valid. * * \param dpy Application supplied \c Display pointer. * \param config Application supplied \c GLXFBConfig. * * \returns If the \c GLXFBConfig is valid, the a pointer to the matching * \c struct glx_config structure is returned. Otherwise, \c NULL * is returned. */ static struct glx_config * ValidateGLXFBConfig(Display * dpy, GLXFBConfig fbconfig) { struct glx_display *const priv = __glXInitialize(dpy); int num_screens = ScreenCount(dpy); unsigned i; struct glx_config *config; if (priv != NULL) { for (i = 0; i < num_screens; i++) { for (config = priv->screens[i]->configs; config != NULL; config = config->next) { if (config == (struct glx_config *) fbconfig) { return config; } } } } return NULL; } _X_HIDDEN Bool glx_context_init(struct glx_context *gc, struct glx_screen *psc, struct glx_config *config) { gc->majorOpcode = __glXSetupForCommand(psc->display->dpy); if (!gc->majorOpcode) return GL_FALSE; gc->screen = psc->scr; gc->psc = psc; gc->config = config; gc->isDirect = GL_TRUE; gc->currentContextTag = -1; return GL_TRUE; } /** * Create a new context. * * \param renderType For FBConfigs, what is the rendering type? */ static GLXContext CreateContext(Display *dpy, int generic_id, struct glx_config *config, GLXContext shareList_user, Bool allowDirect, unsigned code, int renderType, int screen) { struct glx_context *gc; struct glx_screen *psc; struct glx_context *shareList = (struct glx_context *) shareList_user; if (dpy == NULL) return NULL; psc = GetGLXScreenConfigs(dpy, screen); if (psc == NULL) return NULL; if (generic_id == None) return NULL; gc = NULL; #ifdef GLX_USE_APPLEGL gc = applegl_create_context(psc, config, shareList, renderType); #else if (allowDirect && psc->vtable->create_context) gc = psc->vtable->create_context(psc, config, shareList, renderType); if (!gc) gc = indirect_create_context(psc, config, shareList, renderType); #endif if (!gc) return NULL; LockDisplay(dpy); switch (code) { case X_GLXCreateContext: { xGLXCreateContextReq *req; /* Send the glXCreateContext request */ GetReq(GLXCreateContext, req); req->reqType = gc->majorOpcode; req->glxCode = X_GLXCreateContext; req->context = gc->xid = XAllocID(dpy); req->visual = generic_id; req->screen = screen; req->shareList = shareList ? shareList->xid : None; req->isDirect = gc->isDirect; break; } case X_GLXCreateNewContext: { xGLXCreateNewContextReq *req; /* Send the glXCreateNewContext request */ GetReq(GLXCreateNewContext, req); req->reqType = gc->majorOpcode; req->glxCode = X_GLXCreateNewContext; req->context = gc->xid = XAllocID(dpy); req->fbconfig = generic_id; req->screen = screen; req->renderType = renderType; req->shareList = shareList ? shareList->xid : None; req->isDirect = gc->isDirect; break; } case X_GLXvop_CreateContextWithConfigSGIX: { xGLXVendorPrivateWithReplyReq *vpreq; xGLXCreateContextWithConfigSGIXReq *req; /* Send the glXCreateNewContext request */ GetReqExtra(GLXVendorPrivateWithReply, sz_xGLXCreateContextWithConfigSGIXReq - sz_xGLXVendorPrivateWithReplyReq, vpreq); req = (xGLXCreateContextWithConfigSGIXReq *) vpreq; req->reqType = gc->majorOpcode; req->glxCode = X_GLXVendorPrivateWithReply; req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX; req->context = gc->xid = XAllocID(dpy); req->fbconfig = generic_id; req->screen = screen; req->renderType = renderType; req->shareList = shareList ? shareList->xid : None; req->isDirect = gc->isDirect; break; } default: /* What to do here? This case is the sign of an internal error. It * should never be reachable. */ break; } UnlockDisplay(dpy); SyncHandle(); gc->imported = GL_FALSE; gc->renderType = renderType; return (GLXContext) gc; } _X_EXPORT GLXContext glXCreateContext(Display * dpy, XVisualInfo * vis, GLXContext shareList, Bool allowDirect) { struct glx_config *config = NULL; int renderType = 0; #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL) struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen); config = glx_config_find_visual(psc->visuals, vis->visualid); if (config == NULL) { xError error; error.errorCode = BadValue; error.resourceID = vis->visualid; error.sequenceNumber = dpy->request; error.type = X_Error; error.majorCode = __glXSetupForCommand(dpy); error.minorCode = X_GLXCreateContext; _XError(dpy, &error); return None; } renderType = config->rgbMode ? GLX_RGBA_TYPE : GLX_COLOR_INDEX_TYPE; #endif return CreateContext(dpy, vis->visualid, config, shareList, allowDirect, X_GLXCreateContext, renderType, vis->screen); } _X_HIDDEN void glx_send_destroy_context(Display *dpy, XID xid) { CARD8 opcode = __glXSetupForCommand(dpy); xGLXDestroyContextReq *req; LockDisplay(dpy); GetReq(GLXDestroyContext, req); req->reqType = opcode; req->glxCode = X_GLXDestroyContext; req->context = xid; UnlockDisplay(dpy); SyncHandle(); } /* ** Destroy the named context */ _X_EXPORT void glXDestroyContext(Display * dpy, GLXContext ctx) { struct glx_context *gc = (struct glx_context *) ctx; if (!gc) return; __glXLock(); if (gc->currentDpy) { /* This context is bound to some thread. According to the man page, * we should not actually delete the context until it's unbound. * Note that we set gc->xid = None above. In MakeContextCurrent() * we check for that and delete the context there. */ if (!gc->imported) glx_send_destroy_context(dpy, gc->xid); gc->xid = None; __glXUnlock(); return; } __glXUnlock(); gc->vtable->destroy(gc); } /* ** Return the major and minor version #s for the GLX extension */ _X_EXPORT Bool glXQueryVersion(Display * dpy, int *major, int *minor) { struct glx_display *priv; /* Init the extension. This fetches the major and minor version. */ priv = __glXInitialize(dpy); if (!priv) return GL_FALSE; if (major) *major = priv->majorVersion; if (minor) *minor = priv->minorVersion; return GL_TRUE; } /* ** Query the existance of the GLX extension */ _X_EXPORT Bool glXQueryExtension(Display * dpy, int *errorBase, int *eventBase) { int major_op, erb, evb; Bool rv; rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb); if (rv) { if (errorBase) *errorBase = erb; if (eventBase) *eventBase = evb; } return rv; } /* ** Put a barrier in the token stream that forces the GL to finish its ** work before X can proceed. */ _X_EXPORT void glXWaitGL(void) { struct glx_context *gc = __glXGetCurrentContext(); if (gc && gc->vtable->wait_gl) gc->vtable->wait_gl(gc); } /* ** Put a barrier in the token stream that forces X to finish its ** work before GL can proceed. */ _X_EXPORT void glXWaitX(void) { struct glx_context *gc = __glXGetCurrentContext(); if (gc && gc->vtable->wait_x) gc->vtable->wait_x(gc); } _X_EXPORT void glXUseXFont(Font font, int first, int count, int listBase) { struct glx_context *gc = __glXGetCurrentContext(); if (gc && gc->vtable->use_x_font) gc->vtable->use_x_font(gc, font, first, count, listBase); } /************************************************************************/ /* ** Copy the source context to the destination context using the ** attribute "mask". */ _X_EXPORT void glXCopyContext(Display * dpy, GLXContext source_user, GLXContext dest_user, unsigned long mask) { struct glx_context *source = (struct glx_context *) source_user; struct glx_context *dest = (struct glx_context *) dest_user; #ifdef GLX_USE_APPLEGL struct glx_context *gc = __glXGetCurrentContext(); int errorcode; bool x11error; if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext, mask, &errorcode, &x11error)) { __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error); } #else xGLXCopyContextReq *req; struct glx_context *gc = __glXGetCurrentContext(); GLXContextTag tag; CARD8 opcode; opcode = __glXSetupForCommand(dpy); if (!opcode) { return; } #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) if (gc->isDirect) { /* NOT_DONE: This does not work yet */ } #endif /* ** If the source is the current context, send its tag so that the context ** can be flushed before the copy. */ if (source == gc && dpy == gc->currentDpy) { tag = gc->currentContextTag; } else { tag = 0; } /* Send the glXCopyContext request */ LockDisplay(dpy); GetReq(GLXCopyContext, req); req->reqType = opcode; req->glxCode = X_GLXCopyContext; req->source = source ? source->xid : None; req->dest = dest ? dest->xid : None; req->mask = mask; req->contextTag = tag; UnlockDisplay(dpy); SyncHandle(); #endif /* GLX_USE_APPLEGL */ } /** * Determine if a context uses direct rendering. * * \param dpy Display where the context was created. * \param contextID ID of the context to be tested. * * \returns \c GL_TRUE if the context is direct rendering or not. */ static Bool __glXIsDirect(Display * dpy, GLXContextID contextID) { #if !defined(USE_XCB) xGLXIsDirectReq *req; xGLXIsDirectReply reply; #endif CARD8 opcode; opcode = __glXSetupForCommand(dpy); if (!opcode) { return GL_FALSE; } #ifdef USE_XCB xcb_connection_t *c = XGetXCBConnection(dpy); xcb_glx_is_direct_reply_t *reply = xcb_glx_is_direct_reply(c, xcb_glx_is_direct (c, contextID), NULL); const Bool is_direct = reply->is_direct ? True : False; free(reply); return is_direct; #else /* Send the glXIsDirect request */ LockDisplay(dpy); GetReq(GLXIsDirect, req); req->reqType = opcode; req->glxCode = X_GLXIsDirect; req->context = contextID; _XReply(dpy, (xReply *) & reply, 0, False); UnlockDisplay(dpy); SyncHandle(); return reply.isDirect; #endif /* USE_XCB */ } /** * \todo * Shouldn't this function \b always return \c GL_FALSE when * \c GLX_DIRECT_RENDERING is not defined? Do we really need to bother with * the GLX protocol here at all? */ _X_EXPORT Bool glXIsDirect(Display * dpy, GLXContext gc_user) { struct glx_context *gc = (struct glx_context *) gc_user; if (!gc) { return GL_FALSE; } else if (gc->isDirect) { return GL_TRUE; } #ifdef GLX_USE_APPLEGL /* TODO: indirect on darwin */ return GL_FALSE; #else return __glXIsDirect(dpy, gc->xid); #endif } _X_EXPORT GLXPixmap glXCreateGLXPixmap(Display * dpy, XVisualInfo * vis, Pixmap pixmap) { #ifdef GLX_USE_APPLEGL int screen = vis->screen; struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen); const struct glx_config *config; config = glx_config_find_visual(psc->visuals, vis->visualid); if(apple_glx_pixmap_create(dpy, vis->screen, pixmap, config)) return None; return pixmap; #else xGLXCreateGLXPixmapReq *req; struct glx_drawable *glxDraw; GLXPixmap xid; CARD8 opcode; opcode = __glXSetupForCommand(dpy); if (!opcode) { return None; } glxDraw = Xmalloc(sizeof(*glxDraw)); if (!glxDraw) return None; /* Send the glXCreateGLXPixmap request */ LockDisplay(dpy); GetReq(GLXCreateGLXPixmap, req); req->reqType = opcode; req->glxCode = X_GLXCreateGLXPixmap; req->screen = vis->screen; req->visual = vis->visualid; req->pixmap = pixmap; req->glxpixmap = xid = XAllocID(dpy); UnlockDisplay(dpy); SyncHandle(); if (InitGLXDrawable(dpy, glxDraw, pixmap, req->glxpixmap)) { free(glxDraw); return None; } #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) do { /* FIXME: Maybe delay __DRIdrawable creation until the drawable * is actually bound to a context... */ struct glx_display *const priv = __glXInitialize(dpy); __GLXDRIdrawable *pdraw; struct glx_screen *psc; struct glx_config *config; psc = priv->screens[vis->screen]; if (psc->driScreen == NULL) return xid; config = glx_config_find_visual(psc->visuals, vis->visualid); pdraw = psc->driScreen->createDrawable(psc, pixmap, xid, config); if (pdraw == NULL) { fprintf(stderr, "failed to create pixmap\n"); xid = None; break; } if (__glxHashInsert(priv->drawHash, xid, pdraw)) { (*pdraw->destroyDrawable) (pdraw); xid = None; break; } } while (0); if (xid == None) { xGLXDestroyGLXPixmapReq *dreq; LockDisplay(dpy); GetReq(GLXDestroyGLXPixmap, dreq); dreq->reqType = opcode; dreq->glxCode = X_GLXDestroyGLXPixmap; dreq->glxpixmap = xid; UnlockDisplay(dpy); SyncHandle(); } #endif return xid; #endif } /* ** Destroy the named pixmap */ _X_EXPORT void glXDestroyGLXPixmap(Display * dpy, GLXPixmap glxpixmap) { #ifdef GLX_USE_APPLEGL if(apple_glx_pixmap_destroy(dpy, glxpixmap)) __glXSendError(dpy, GLXBadPixmap, glxpixmap, X_GLXDestroyPixmap, false); #else xGLXDestroyGLXPixmapReq *req; CARD8 opcode; opcode = __glXSetupForCommand(dpy); if (!opcode) { return; } /* Send the glXDestroyGLXPixmap request */ LockDisplay(dpy); GetReq(GLXDestroyGLXPixmap, req); req->reqType = opcode; req->glxCode = X_GLXDestroyGLXPixmap; req->glxpixmap = glxpixmap; UnlockDisplay(dpy); SyncHandle(); DestroyGLXDrawable(dpy, glxpixmap); #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) { struct glx_display *const priv = __glXInitialize(dpy); __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, glxpixmap); if (pdraw != NULL) { (*pdraw->destroyDrawable) (pdraw); __glxHashDelete(priv->drawHash, glxpixmap); } } #endif #endif /* GLX_USE_APPLEGL */ } _X_EXPORT void glXSwapBuffers(Display * dpy, GLXDrawable drawable) { #ifdef GLX_USE_APPLEGL struct glx_context * gc = __glXGetCurrentContext(); if(gc && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) { apple_glx_swap_buffers(gc->driContext); } else { __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false); } #else struct glx_context *gc; GLXContextTag tag; CARD8 opcode; #ifdef USE_XCB xcb_connection_t *c; #else xGLXSwapBuffersReq *req; #endif gc = __glXGetCurrentContext(); #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) { __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable); if (pdraw != NULL) { if (gc && drawable == gc->currentDrawable) { glFlush(); } (*pdraw->psc->driScreen->swapBuffers)(pdraw, 0, 0, 0); return; } } #endif opcode = __glXSetupForCommand(dpy); if (!opcode) { return; } /* ** The calling thread may or may not have a current context. If it ** does, send the context tag so the server can do a flush. */ if ((gc != NULL) && (dpy == gc->currentDpy) && ((drawable == gc->currentDrawable) || (drawable == gc->currentReadable))) { tag = gc->currentContextTag; } else { tag = 0; } #ifdef USE_XCB c = XGetXCBConnection(dpy); xcb_glx_swap_buffers(c, tag, drawable); xcb_flush(c); #else /* Send the glXSwapBuffers request */ LockDisplay(dpy); GetReq(GLXSwapBuffers, req); req->reqType = opcode; req->glxCode = X_GLXSwapBuffers; req->drawable = drawable; req->contextTag = tag; UnlockDisplay(dpy); SyncHandle(); XFlush(dpy); #endif /* USE_XCB */ #endif /* GLX_USE_APPLEGL */ } /* ** Return configuration information for the given display, screen and ** visual combination. */ _X_EXPORT int glXGetConfig(Display * dpy, XVisualInfo * vis, int attribute, int *value_return) { struct glx_display *priv; struct glx_screen *psc; struct glx_config *config; int status; status = GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc); if (status == Success) { config = glx_config_find_visual(psc->visuals, vis->visualid); /* Lookup attribute after first finding a match on the visual */ if (config != NULL) { return glx_config_get(config, attribute, value_return); } status = GLX_BAD_VISUAL; } /* ** If we can't find the config for this visual, this visual is not ** supported by the OpenGL implementation on the server. */ if ((status == GLX_BAD_VISUAL) && (attribute == GLX_USE_GL)) { *value_return = GL_FALSE; status = Success; } return status; } /************************************************************************/ static void init_fbconfig_for_chooser(struct glx_config * config, GLboolean fbconfig_style_tags) { memset(config, 0, sizeof(struct glx_config)); config->visualID = (XID) GLX_DONT_CARE; config->visualType = GLX_DONT_CARE; /* glXChooseFBConfig specifies different defaults for these two than * glXChooseVisual. */ if (fbconfig_style_tags) { config->rgbMode = GL_TRUE; config->doubleBufferMode = GLX_DONT_CARE; } config->visualRating = GLX_DONT_CARE; config->transparentPixel = GLX_NONE; config->transparentRed = GLX_DONT_CARE; config->transparentGreen = GLX_DONT_CARE; config->transparentBlue = GLX_DONT_CARE; config->transparentAlpha = GLX_DONT_CARE; config->transparentIndex = GLX_DONT_CARE; config->drawableType = GLX_WINDOW_BIT; config->renderType = (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT; config->xRenderable = GLX_DONT_CARE; config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE); config->swapMethod = GLX_DONT_CARE; } #define MATCH_DONT_CARE( param ) \ do { \ if ( ((int) a-> param != (int) GLX_DONT_CARE) \ && (a-> param != b-> param) ) { \ return False; \ } \ } while ( 0 ) #define MATCH_MINIMUM( param ) \ do { \ if ( ((int) a-> param != (int) GLX_DONT_CARE) \ && (a-> param > b-> param) ) { \ return False; \ } \ } while ( 0 ) #define MATCH_EXACT( param ) \ do { \ if ( a-> param != b-> param) { \ return False; \ } \ } while ( 0 ) /* Test that all bits from a are contained in b */ #define MATCH_MASK(param) \ do { \ if ((a->param & ~b->param) != 0) \ return False; \ } while (0); /** * Determine if two GLXFBConfigs are compatible. * * \param a Application specified config to test. * \param b Server specified config to test against \c a. */ static Bool fbconfigs_compatible(const struct glx_config * const a, const struct glx_config * const b) { MATCH_DONT_CARE(doubleBufferMode); MATCH_DONT_CARE(visualType); MATCH_DONT_CARE(visualRating); MATCH_DONT_CARE(xRenderable); MATCH_DONT_CARE(fbconfigID); MATCH_DONT_CARE(swapMethod); MATCH_MINIMUM(rgbBits); MATCH_MINIMUM(numAuxBuffers); MATCH_MINIMUM(redBits); MATCH_MINIMUM(greenBits); MATCH_MINIMUM(blueBits); MATCH_MINIMUM(alphaBits); MATCH_MINIMUM(depthBits); MATCH_MINIMUM(stencilBits); MATCH_MINIMUM(accumRedBits); MATCH_MINIMUM(accumGreenBits); MATCH_MINIMUM(accumBlueBits); MATCH_MINIMUM(accumAlphaBits); MATCH_MINIMUM(sampleBuffers); MATCH_MINIMUM(maxPbufferWidth); MATCH_MINIMUM(maxPbufferHeight); MATCH_MINIMUM(maxPbufferPixels); MATCH_MINIMUM(samples); MATCH_DONT_CARE(stereoMode); MATCH_EXACT(level); MATCH_MASK(drawableType); MATCH_MASK(renderType); /* There is a bug in a few of the XFree86 DDX drivers. They contain * visuals with a "transparent type" of 0 when they really mean GLX_NONE. * Technically speaking, it is a bug in the DDX driver, but there is * enough of an installed base to work around the problem here. In any * case, 0 is not a valid value of the transparent type, so we'll treat 0 * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and * 0 from the server to be a match to maintain backward compatibility with * the (broken) drivers. */ if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) { if (a->transparentPixel == GLX_NONE) { if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0) return False; } else { MATCH_EXACT(transparentPixel); } switch (a->transparentPixel) { case GLX_TRANSPARENT_RGB: MATCH_DONT_CARE(transparentRed); MATCH_DONT_CARE(transparentGreen); MATCH_DONT_CARE(transparentBlue); MATCH_DONT_CARE(transparentAlpha); break; case GLX_TRANSPARENT_INDEX: MATCH_DONT_CARE(transparentIndex); break; default: break; } } return True; } /* There's some trickly language in the GLX spec about how this is supposed * to work. Basically, if a given component size is either not specified * or the requested size is zero, it is supposed to act like PERFER_SMALLER. * Well, that's really hard to do with the code as-is. This behavior is * closer to correct, but still not technically right. */ #define PREFER_LARGER_OR_ZERO(comp) \ do { \ if ( ((*a)-> comp) != ((*b)-> comp) ) { \ if ( ((*a)-> comp) == 0 ) { \ return -1; \ } \ else if ( ((*b)-> comp) == 0 ) { \ return 1; \ } \ else { \ return ((*b)-> comp) - ((*a)-> comp) ; \ } \ } \ } while( 0 ) #define PREFER_LARGER(comp) \ do { \ if ( ((*a)-> comp) != ((*b)-> comp) ) { \ return ((*b)-> comp) - ((*a)-> comp) ; \ } \ } while( 0 ) #define PREFER_SMALLER(comp) \ do { \ if ( ((*a)-> comp) != ((*b)-> comp) ) { \ return ((*a)-> comp) - ((*b)-> comp) ; \ } \ } while( 0 ) /** * Compare two GLXFBConfigs. This function is intended to be used as the * compare function passed in to qsort. * * \returns If \c a is a "better" config, according to the specification of * SGIX_fbconfig, a number less than zero is returned. If \c b is * better, then a number greater than zero is return. If both are * equal, zero is returned. * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX */ static int fbconfig_compare(struct glx_config **a, struct glx_config **b) { /* The order of these comparisons must NOT change. It is defined by * the GLX 1.3 spec and ARB_multisample. */ PREFER_SMALLER(visualSelectGroup); /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and * GLX_NON_CONFORMANT_CONFIG. It just so happens that this is the * numerical sort order of the enums (0x8000, 0x8001, and 0x800D). */ PREFER_SMALLER(visualRating); /* This isn't quite right. It is supposed to compare the sum of the * components the user specifically set minimums for. */ PREFER_LARGER_OR_ZERO(redBits); PREFER_LARGER_OR_ZERO(greenBits); PREFER_LARGER_OR_ZERO(blueBits); PREFER_LARGER_OR_ZERO(alphaBits); PREFER_SMALLER(rgbBits); if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) { /* Prefer single-buffer. */ return (!(*a)->doubleBufferMode) ? -1 : 1; } PREFER_SMALLER(numAuxBuffers); PREFER_LARGER_OR_ZERO(depthBits); PREFER_SMALLER(stencilBits); /* This isn't quite right. It is supposed to compare the sum of the * components the user specifically set minimums for. */ PREFER_LARGER_OR_ZERO(accumRedBits); PREFER_LARGER_OR_ZERO(accumGreenBits); PREFER_LARGER_OR_ZERO(accumBlueBits); PREFER_LARGER_OR_ZERO(accumAlphaBits); PREFER_SMALLER(visualType); /* None of the multisample specs say where this comparison should happen, * so I put it near the end. */ PREFER_SMALLER(sampleBuffers); PREFER_SMALLER(samples); /* None of the pbuffer or fbconfig specs say that this comparison needs * to happen at all, but it seems like it should. */ PREFER_LARGER(maxPbufferWidth); PREFER_LARGER(maxPbufferHeight); PREFER_LARGER(maxPbufferPixels); return 0; } /** * Selects and sorts a subset of the supplied configs based on the attributes. * This function forms to basis of \c glXChooseVisual, \c glXChooseFBConfig, * and \c glXChooseFBConfigSGIX. * * \param configs Array of pointers to possible configs. The elements of * this array that do not meet the criteria will be set to * NULL. The remaining elements will be sorted according to * the various visual / FBConfig selection rules. * \param num_configs Number of elements in the \c configs array. * \param attribList Attributes used select from \c configs. This array is * terminated by a \c None tag. The array can either take * the form expected by \c glXChooseVisual (where boolean * tags do not have a value) or by \c glXChooseFBConfig * (where every tag has a value). * \param fbconfig_style_tags Selects whether \c attribList is in * \c glXChooseVisual style or * \c glXChooseFBConfig style. * \returns The number of valid elements left in \c configs. * * \sa glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX */ static int choose_visual(struct glx_config ** configs, int num_configs, const int *attribList, GLboolean fbconfig_style_tags) { struct glx_config test_config; int base; int i; /* This is a fairly direct implementation of the selection method * described by GLX_SGIX_fbconfig. Start by culling out all the * configs that are not compatible with the selected parameter * list. */ init_fbconfig_for_chooser(&test_config, fbconfig_style_tags); __glXInitializeVisualConfigFromTags(&test_config, 512, (const INT32 *) attribList, GL_TRUE, fbconfig_style_tags); base = 0; for (i = 0; i < num_configs; i++) { if (fbconfigs_compatible(&test_config, configs[i])) { configs[base] = configs[i]; base++; } } if (base == 0) { return 0; } if (base < num_configs) { (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base)); } /* After the incompatible configs are removed, the resulting * list is sorted according to the rules set out in the various * specifications. */ qsort(configs, base, sizeof(struct glx_config *), (int (*)(const void *, const void *)) fbconfig_compare); return base; } /* ** Return the visual that best matches the template. Return None if no ** visual matches the template. */ _X_EXPORT XVisualInfo * glXChooseVisual(Display * dpy, int screen, int *attribList) { XVisualInfo *visualList = NULL; struct glx_display *priv; struct glx_screen *psc; struct glx_config test_config; struct glx_config *config; struct glx_config *best_config = NULL; /* ** Get a list of all visuals, return if list is empty */ if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) { return None; } /* ** Build a template from the defaults and the attribute list ** Free visual list and return if an unexpected token is encountered */ init_fbconfig_for_chooser(&test_config, GL_FALSE); __glXInitializeVisualConfigFromTags(&test_config, 512, (const INT32 *) attribList, GL_TRUE, GL_FALSE); /* ** Eliminate visuals that don't meet minimum requirements ** Compute a score for those that do ** Remember which visual, if any, got the highest score ** If no visual is acceptable, return None ** Otherwise, create an XVisualInfo list with just the selected X visual ** and return this. */ for (config = psc->visuals; config != NULL; config = config->next) { if (fbconfigs_compatible(&test_config, config) && ((best_config == NULL) || (fbconfig_compare (&config, &best_config) < 0))) { XVisualInfo visualTemplate; XVisualInfo *newList; int i; visualTemplate.screen = screen; visualTemplate.visualid = config->visualID; newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask, &visualTemplate, &i); if (newList) { Xfree(visualList); visualList = newList; best_config = config; } } } #ifdef GLX_USE_APPLEGL if(visualList && getenv("LIBGL_DUMP_VISUALID")) { printf("visualid 0x%lx\n", visualList[0].visualid); } #endif return visualList; } _X_EXPORT const char * glXQueryExtensionsString(Display * dpy, int screen) { struct glx_screen *psc; struct glx_display *priv; if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) { return NULL; } if (!psc->effectiveGLXexts) { if (!psc->serverGLXexts) { psc->serverGLXexts = __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS); } __glXCalculateUsableExtensions(psc, #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) (psc->driScreen != NULL), #else GL_FALSE, #endif priv->minorVersion); } return psc->effectiveGLXexts; } _X_EXPORT const char * glXGetClientString(Display * dpy, int name) { (void) dpy; switch (name) { case GLX_VENDOR: return (__glXGLXClientVendorName); case GLX_VERSION: return (__glXGLXClientVersion); case GLX_EXTENSIONS: return (__glXGetClientExtensions()); default: return NULL; } } _X_EXPORT const char * glXQueryServerString(Display * dpy, int screen, int name) { struct glx_screen *psc; struct glx_display *priv; const char **str; if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) { return NULL; } switch (name) { case GLX_VENDOR: str = &priv->serverGLXvendor; break; case GLX_VERSION: str = &priv->serverGLXversion; break; case GLX_EXTENSIONS: str = &psc->serverGLXexts; break; default: return NULL; } if (*str == NULL) { *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name); } return *str; } void __glXClientInfo(Display * dpy, int opcode) { char *ext_str = __glXGetClientGLExtensionString(); int size = strlen(ext_str) + 1; #ifdef USE_XCB xcb_connection_t *c = XGetXCBConnection(dpy); xcb_glx_client_info(c, GLX_MAJOR_VERSION, GLX_MINOR_VERSION, size, ext_str); #else xGLXClientInfoReq *req; /* Send the glXClientInfo request */ LockDisplay(dpy); GetReq(GLXClientInfo, req); req->reqType = opcode; req->glxCode = X_GLXClientInfo; req->major = GLX_MAJOR_VERSION; req->minor = GLX_MINOR_VERSION; req->length += (size + 3) >> 2; req->numbytes = size; Data(dpy, ext_str, size); UnlockDisplay(dpy); SyncHandle(); #endif /* USE_XCB */ Xfree(ext_str); } /* ** EXT_import_context */ _X_EXPORT Display * glXGetCurrentDisplay(void) { struct glx_context *gc = __glXGetCurrentContext(); if (NULL == gc) return NULL; return gc->currentDpy; } _X_EXPORT GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (), glXGetCurrentDisplay) #ifndef GLX_USE_APPLEGL _X_EXPORT GLXContext glXImportContextEXT(Display *dpy, GLXContextID contextID) { struct glx_display *priv = __glXInitialize(dpy); struct glx_screen *psc; xGLXQueryContextReply reply; CARD8 opcode; struct glx_context *ctx; int propList[__GLX_MAX_CONTEXT_PROPS * 2], *pProp, nPropListBytes; int i, renderType; XID share; struct glx_config *mode; if (contextID == None || __glXIsDirect(dpy, contextID)) return NULL; opcode = __glXSetupForCommand(dpy); if (!opcode) return 0; /* Send the glXQueryContextInfoEXT request */ LockDisplay(dpy); if (priv->majorVersion > 1 || priv->minorVersion >= 3) { xGLXQueryContextReq *req; GetReq(GLXQueryContext, req); req->reqType = opcode; req->glxCode = X_GLXQueryContext; req->context = contextID; } else { xGLXVendorPrivateReq *vpreq; xGLXQueryContextInfoEXTReq *req; GetReqExtra(GLXVendorPrivate, sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq, vpreq); req = (xGLXQueryContextInfoEXTReq *) vpreq; req->reqType = opcode; req->glxCode = X_GLXVendorPrivateWithReply; req->vendorCode = X_GLXvop_QueryContextInfoEXT; req->context = contextID; } _XReply(dpy, (xReply *) & reply, 0, False); if (reply.n <= __GLX_MAX_CONTEXT_PROPS) nPropListBytes = reply.n * 2 * sizeof propList[0]; else nPropListBytes = 0; _XRead(dpy, (char *) propList, nPropListBytes); UnlockDisplay(dpy); SyncHandle(); /* Look up screen first so we can look up visuals/fbconfigs later */ psc = NULL; for (i = 0, pProp = propList; i < reply.n; i++, pProp += 2) if (pProp[0] == GLX_SCREEN) psc = GetGLXScreenConfigs(dpy, pProp[1]); if (psc == NULL) return NULL; share = None; mode = NULL; renderType = 0; pProp = propList; for (i = 0, pProp = propList; i < reply.n; i++, pProp += 2) switch (pProp[0]) { case GLX_SHARE_CONTEXT_EXT: share = pProp[1]; break; case GLX_VISUAL_ID_EXT: mode = glx_config_find_visual(psc->visuals, pProp[1]); break; case GLX_FBCONFIG_ID: mode = glx_config_find_fbconfig(psc->configs, pProp[1]); break; case GLX_RENDER_TYPE: renderType = pProp[1]; break; } if (mode == NULL) return NULL; ctx = indirect_create_context(psc, mode, NULL, renderType); if (ctx == NULL) return NULL; ctx->xid = contextID; ctx->imported = GL_TRUE; ctx->share_xid = share; return (GLXContext) ctx; } #endif _X_EXPORT int glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value) { struct glx_context *ctx = (struct glx_context *) ctx_user; switch (attribute) { case GLX_SHARE_CONTEXT_EXT: *value = ctx->share_xid; break; case GLX_VISUAL_ID_EXT: *value = ctx->config ? ctx->config->visualID : None; break; case GLX_SCREEN: *value = ctx->screen; break; case GLX_FBCONFIG_ID: *value = ctx->config ? ctx->config->fbconfigID : None; break; case GLX_RENDER_TYPE: *value = ctx->renderType; break; default: return GLX_BAD_ATTRIBUTE; } return Success; } _X_EXPORT GLX_ALIAS(int, glXQueryContextInfoEXT, (Display * dpy, GLXContext ctx, int attribute, int *value), (dpy, ctx, attribute, value), glXQueryContext) _X_EXPORT GLXContextID glXGetContextIDEXT(const GLXContext ctx_user) { struct glx_context *ctx = (struct glx_context *) ctx_user; return ctx->xid; } _X_EXPORT GLX_ALIAS_VOID(glXFreeContextEXT, (Display *dpy, GLXContext ctx), (dpy, ctx), glXDestroyContext); _X_EXPORT GLXFBConfig * glXChooseFBConfig(Display * dpy, int screen, const int *attribList, int *nitems) { struct glx_config **config_list; int list_size; config_list = (struct glx_config **) glXGetFBConfigs(dpy, screen, &list_size); if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) { list_size = choose_visual(config_list, list_size, attribList, GL_TRUE); if (list_size == 0) { XFree(config_list); config_list = NULL; } } *nitems = list_size; return (GLXFBConfig *) config_list; } _X_EXPORT GLXContext glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig, int renderType, GLXContext shareList, Bool allowDirect) { struct glx_config *config = (struct glx_config *) fbconfig; return CreateContext(dpy, config->fbconfigID, config, shareList, allowDirect, X_GLXCreateNewContext, renderType, config->screen); } _X_EXPORT GLXDrawable glXGetCurrentReadDrawable(void) { struct glx_context *gc = __glXGetCurrentContext(); return gc->currentReadable; } _X_EXPORT GLXFBConfig * glXGetFBConfigs(Display * dpy, int screen, int *nelements) { struct glx_display *priv = __glXInitialize(dpy); struct glx_config **config_list = NULL; struct glx_config *config; unsigned num_configs = 0; int i; *nelements = 0; if (priv && (priv->screens != NULL) && (screen >= 0) && (screen <= ScreenCount(dpy)) && (priv->screens[screen]->configs != NULL) && (priv->screens[screen]->configs->fbconfigID != (int) GLX_DONT_CARE)) { for (config = priv->screens[screen]->configs; config != NULL; config = config->next) { if (config->fbconfigID != (int) GLX_DONT_CARE) { num_configs++; } } config_list = Xmalloc(num_configs * sizeof *config_list); if (config_list != NULL) { *nelements = num_configs; i = 0; for (config = priv->screens[screen]->configs; config != NULL; config = config->next) { if (config->fbconfigID != (int) GLX_DONT_CARE) { config_list[i] = config; i++; } } } } return (GLXFBConfig *) config_list; } _X_EXPORT int glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig, int attribute, int *value) { struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig); if (config == NULL) return GLXBadFBConfig; return glx_config_get(config, attribute, value); } _X_EXPORT XVisualInfo * glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig) { XVisualInfo visualTemplate; struct glx_config *config = (struct glx_config *) fbconfig; int count; /* ** Get a list of all visuals, return if list is empty */ visualTemplate.visualid = config->visualID; return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count); } #ifndef GLX_USE_APPLEGL /* ** GLX_SGI_swap_control */ static int __glXSwapIntervalSGI(int interval) { xGLXVendorPrivateReq *req; struct glx_context *gc = __glXGetCurrentContext(); struct glx_screen *psc; Display *dpy; CARD32 *interval_ptr; CARD8 opcode; if (gc == NULL) { return GLX_BAD_CONTEXT; } if (interval <= 0) { return GLX_BAD_VALUE; } psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen); #ifdef GLX_DIRECT_RENDERING if (gc->isDirect && psc->driScreen && psc->driScreen->setSwapInterval) { __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); psc->driScreen->setSwapInterval(pdraw, interval); return 0; } #endif dpy = gc->currentDpy; opcode = __glXSetupForCommand(dpy); if (!opcode) { return 0; } /* Send the glXSwapIntervalSGI request */ LockDisplay(dpy); GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req); req->reqType = opcode; req->glxCode = X_GLXVendorPrivate; req->vendorCode = X_GLXvop_SwapIntervalSGI; req->contextTag = gc->currentContextTag; interval_ptr = (CARD32 *) (req + 1); *interval_ptr = interval; UnlockDisplay(dpy); SyncHandle(); XFlush(dpy); return 0; } /* ** GLX_MESA_swap_control */ static int __glXSwapIntervalMESA(unsigned int interval) { #ifdef GLX_DIRECT_RENDERING struct glx_context *gc = __glXGetCurrentContext(); if (gc != NULL && gc->isDirect) { struct glx_screen *psc; psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen); if (psc->driScreen && psc->driScreen->setSwapInterval) { __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); return psc->driScreen->setSwapInterval(pdraw, interval); } } #endif return GLX_BAD_CONTEXT; } static int __glXGetSwapIntervalMESA(void) { #ifdef GLX_DIRECT_RENDERING struct glx_context *gc = __glXGetCurrentContext(); if (gc != NULL && gc->isDirect) { struct glx_screen *psc; psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen); if (psc->driScreen && psc->driScreen->getSwapInterval) { __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); return psc->driScreen->getSwapInterval(pdraw); } } #endif return 0; } /* ** GLX_SGI_video_sync */ static int __glXGetVideoSyncSGI(unsigned int *count) { int64_t ust, msc, sbc; int ret; struct glx_context *gc = __glXGetCurrentContext(); struct glx_screen *psc; #ifdef GLX_DIRECT_RENDERING __GLXDRIdrawable *pdraw; #endif if (!gc) return GLX_BAD_CONTEXT; #ifdef GLX_DIRECT_RENDERING if (!gc->isDirect) return GLX_BAD_CONTEXT; #endif psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen); #ifdef GLX_DIRECT_RENDERING pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); #endif /* FIXME: Looking at the GLX_SGI_video_sync spec in the extension registry, * FIXME: there should be a GLX encoding for this call. I can find no * FIXME: documentation for the GLX encoding. */ #ifdef GLX_DIRECT_RENDERING if (psc->driScreen && psc->driScreen->getDrawableMSC) { ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc); *count = (unsigned) msc; return (ret == True) ? 0 : GLX_BAD_CONTEXT; } #endif return GLX_BAD_CONTEXT; } static int __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count) { struct glx_context *gc = __glXGetCurrentContext(); struct glx_screen *psc; #ifdef GLX_DIRECT_RENDERING __GLXDRIdrawable *pdraw; #endif int64_t ust, msc, sbc; int ret; if (divisor <= 0 || remainder < 0) return GLX_BAD_VALUE; if (!gc) return GLX_BAD_CONTEXT; #ifdef GLX_DIRECT_RENDERING if (!gc->isDirect) return GLX_BAD_CONTEXT; #endif psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen); #ifdef GLX_DIRECT_RENDERING pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); #endif #ifdef GLX_DIRECT_RENDERING if (psc->driScreen && psc->driScreen->waitForMSC) { ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc, &sbc); *count = (unsigned) msc; return (ret == True) ? 0 : GLX_BAD_CONTEXT; } #endif return GLX_BAD_CONTEXT; } #endif /* GLX_USE_APPLEGL */ /* ** GLX_SGIX_fbconfig ** Many of these functions are aliased to GLX 1.3 entry points in the ** GLX_functions table. */ _X_EXPORT GLX_ALIAS(int, glXGetFBConfigAttribSGIX, (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value), (dpy, config, attribute, value), glXGetFBConfigAttrib) _X_EXPORT GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX, (Display * dpy, int screen, int *attrib_list, int *nelements), (dpy, screen, attrib_list, nelements), glXChooseFBConfig) _X_EXPORT GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX, (Display * dpy, GLXFBConfigSGIX config), (dpy, config), glXGetVisualFromFBConfig) _X_EXPORT GLXPixmap glXCreateGLXPixmapWithConfigSGIX(Display * dpy, GLXFBConfigSGIX fbconfig, Pixmap pixmap) { #ifndef GLX_USE_APPLEGL xGLXVendorPrivateWithReplyReq *vpreq; xGLXCreateGLXPixmapWithConfigSGIXReq *req; GLXPixmap xid = None; CARD8 opcode; struct glx_screen *psc; #endif struct glx_config *config = (struct glx_config *) fbconfig; if ((dpy == NULL) || (config == NULL)) { return None; } #ifdef GLX_USE_APPLEGL if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config)) return None; return pixmap; #else psc = GetGLXScreenConfigs(dpy, config->screen); if ((psc != NULL) && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) { opcode = __glXSetupForCommand(dpy); if (!opcode) { return None; } /* Send the glXCreateGLXPixmapWithConfigSGIX request */ LockDisplay(dpy); GetReqExtra(GLXVendorPrivateWithReply, sz_xGLXCreateGLXPixmapWithConfigSGIXReq - sz_xGLXVendorPrivateWithReplyReq, vpreq); req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq; req->reqType = opcode; req->glxCode = X_GLXVendorPrivateWithReply; req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX; req->screen = config->screen; req->fbconfig = config->fbconfigID; req->pixmap = pixmap; req->glxpixmap = xid = XAllocID(dpy); UnlockDisplay(dpy); SyncHandle(); } return xid; #endif } _X_EXPORT GLXContext glXCreateContextWithConfigSGIX(Display * dpy, GLXFBConfigSGIX fbconfig, int renderType, GLXContext shareList, Bool allowDirect) { GLXContext gc = NULL; struct glx_config *config = (struct glx_config *) fbconfig; struct glx_screen *psc; if ((dpy == NULL) || (config == NULL)) { return None; } psc = GetGLXScreenConfigs(dpy, config->screen); if ((psc != NULL) && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) { gc = CreateContext(dpy, config->fbconfigID, config, shareList, allowDirect, X_GLXvop_CreateContextWithConfigSGIX, renderType, config->screen); } return gc; } _X_EXPORT GLXFBConfigSGIX glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis) { struct glx_display *priv; struct glx_screen *psc = NULL; if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success) && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit) && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) { return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs, vis->visualid); } return NULL; } #ifndef GLX_USE_APPLEGL /* ** GLX_SGIX_swap_group */ static void __glXJoinSwapGroupSGIX(Display * dpy, GLXDrawable drawable, GLXDrawable member) { (void) dpy; (void) drawable; (void) member; } /* ** GLX_SGIX_swap_barrier */ static void __glXBindSwapBarrierSGIX(Display * dpy, GLXDrawable drawable, int barrier) { (void) dpy; (void) drawable; (void) barrier; } static Bool __glXQueryMaxSwapBarriersSGIX(Display * dpy, int screen, int *max) { (void) dpy; (void) screen; (void) max; return False; } /* ** GLX_OML_sync_control */ static Bool __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable, int64_t * ust, int64_t * msc, int64_t * sbc) { struct glx_display * const priv = __glXInitialize(dpy); int ret; #ifdef GLX_DIRECT_RENDERING __GLXDRIdrawable *pdraw; #endif struct glx_screen *psc; if (!priv) return False; #ifdef GLX_DIRECT_RENDERING pdraw = GetGLXDRIDrawable(dpy, drawable); psc = pdraw ? pdraw->psc : NULL; if (pdraw && psc->driScreen->getDrawableMSC) { ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc); return ret; } #endif return False; } #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) _X_HIDDEN GLboolean __glxGetMscRate(__GLXDRIdrawable *glxDraw, int32_t * numerator, int32_t * denominator) { #ifdef XF86VIDMODE struct glx_screen *psc; XF86VidModeModeLine mode_line; int dot_clock; int i; psc = glxDraw->psc; if (XF86VidModeQueryVersion(psc->dpy, &i, &i) && XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) { unsigned n = dot_clock * 1000; unsigned d = mode_line.vtotal * mode_line.htotal; # define V_INTERLACE 0x010 # define V_DBLSCAN 0x020 if (mode_line.flags & V_INTERLACE) n *= 2; else if (mode_line.flags & V_DBLSCAN) d *= 2; /* The OML_sync_control spec requires that if the refresh rate is a * whole number, that the returned numerator be equal to the refresh * rate and the denominator be 1. */ if (n % d == 0) { n /= d; d = 1; } else { static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 }; /* This is a poor man's way to reduce a fraction. It's far from * perfect, but it will work well enough for this situation. */ for (i = 0; f[i] != 0; i++) { while (n % f[i] == 0 && d % f[i] == 0) { d /= f[i]; n /= f[i]; } } } *numerator = n; *denominator = d; return True; } else #endif return False; } #endif /** * Determine the refresh rate of the specified drawable and display. * * \param dpy Display whose refresh rate is to be determined. * \param drawable Drawable whose refresh rate is to be determined. * \param numerator Numerator of the refresh rate. * \param demoninator Denominator of the refresh rate. * \return If the refresh rate for the specified display and drawable could * be calculated, True is returned. Otherwise False is returned. * * \note This function is implemented entirely client-side. A lot of other * functionality is required to export GLX_OML_sync_control, so on * XFree86 this function can be called for direct-rendering contexts * when GLX_OML_sync_control appears in the client extension string. */ _X_HIDDEN GLboolean __glXGetMscRateOML(Display * dpy, GLXDrawable drawable, int32_t * numerator, int32_t * denominator) { #if defined( GLX_DIRECT_RENDERING ) && defined( XF86VIDMODE ) __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable); if (draw == NULL) return False; return __glxGetMscRate(draw, numerator, denominator); #else (void) dpy; (void) drawable; (void) numerator; (void) denominator; #endif return False; } static int64_t __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder) { struct glx_context *gc = __glXGetCurrentContext(); #ifdef GLX_DIRECT_RENDERING __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable); struct glx_screen *psc = pdraw ? pdraw->psc : NULL; #endif if (!gc) /* no GLX for this */ return -1; #ifdef GLX_DIRECT_RENDERING if (!pdraw || !gc->isDirect) return -1; #endif /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE * error", but it also says "It [glXSwapBuffersMscOML] will return a value * of -1 if the function failed because of errors detected in the input * parameters" */ if (divisor < 0 || remainder < 0 || target_msc < 0) return -1; if (divisor > 0 && remainder >= divisor) return -1; if (target_msc == 0 && divisor == 0 && remainder == 0) remainder = 1; #ifdef GLX_DIRECT_RENDERING if (psc->driScreen && psc->driScreen->swapBuffers) return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor, remainder); #endif return -1; } static Bool __glXWaitForMscOML(Display * dpy, GLXDrawable drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t * ust, int64_t * msc, int64_t * sbc) { #ifdef GLX_DIRECT_RENDERING __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable); struct glx_screen *psc = pdraw ? pdraw->psc : NULL; int ret; #endif /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE * error", but the return type in the spec is Bool. */ if (divisor < 0 || remainder < 0 || target_msc < 0) return False; if (divisor > 0 && remainder >= divisor) return False; #ifdef GLX_DIRECT_RENDERING if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) { ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder, ust, msc, sbc); return ret; } #endif return False; } static Bool __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable, int64_t target_sbc, int64_t * ust, int64_t * msc, int64_t * sbc) { #ifdef GLX_DIRECT_RENDERING __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable); struct glx_screen *psc = pdraw ? pdraw->psc : NULL; int ret; #endif /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE * error", but the return type in the spec is Bool. */ if (target_sbc < 0) return False; #ifdef GLX_DIRECT_RENDERING if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) { ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc); return ret; } #endif return False; } /*@}*/ /** * Mesa extension stubs. These will help reduce portability problems. */ /*@{*/ /** * Release all buffers associated with the specified GLX drawable. * * \todo * This function was intended for stand-alone Mesa. The issue there is that * the library doesn't get any notification when a window is closed. In * DRI there is a similar but slightly different issue. When GLX 1.3 is * supported, there are 3 different functions to destroy a drawable. It * should be possible to create GLX protocol (or have it determine which * protocol to use based on the type of the drawable) to have one function * do the work of 3. For the direct-rendering case, this function could * just call the driver's \c __DRIdrawableRec::destroyDrawable function. * This would reduce the frequency with which \c __driGarbageCollectDrawables * would need to be used. This really should be done as part of the new DRI * interface work. * * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt * __driGarbageCollectDrawables * glXDestroyGLXPixmap * glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow * glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX */ static Bool __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d) { (void) dpy; (void) d; return False; } _X_EXPORT GLXPixmap glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual, Pixmap pixmap, Colormap cmap) { (void) dpy; (void) visual; (void) pixmap; (void) cmap; return 0; } /*@}*/ /** * GLX_MESA_copy_sub_buffer */ #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */ static void __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable, int x, int y, int width, int height) { xGLXVendorPrivateReq *req; struct glx_context *gc; GLXContextTag tag; CARD32 *drawable_ptr; INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr; CARD8 opcode; #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable); if (pdraw != NULL) { struct glx_screen *psc = pdraw->psc; if (psc->driScreen->copySubBuffer != NULL) { glFlush(); (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height); } return; } #endif opcode = __glXSetupForCommand(dpy); if (!opcode) return; /* ** The calling thread may or may not have a current context. If it ** does, send the context tag so the server can do a flush. */ gc = __glXGetCurrentContext(); if ((gc != NULL) && (dpy == gc->currentDpy) && ((drawable == gc->currentDrawable) || (drawable == gc->currentReadable))) { tag = gc->currentContextTag; } else { tag = 0; } LockDisplay(dpy); GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req); req->reqType = opcode; req->glxCode = X_GLXVendorPrivate; req->vendorCode = X_GLXvop_CopySubBufferMESA; req->contextTag = tag; drawable_ptr = (CARD32 *) (req + 1); x_ptr = (INT32 *) (drawable_ptr + 1); y_ptr = (INT32 *) (drawable_ptr + 2); w_ptr = (INT32 *) (drawable_ptr + 3); h_ptr = (INT32 *) (drawable_ptr + 4); *drawable_ptr = drawable; *x_ptr = x; *y_ptr = y; *w_ptr = width; *h_ptr = height; UnlockDisplay(dpy); SyncHandle(); } /*@{*/ static void __glXBindTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer, const int *attrib_list) { struct glx_context *gc = __glXGetCurrentContext(); if (gc == NULL || gc->vtable->bind_tex_image == NULL) return; gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list); } static void __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer) { struct glx_context *gc = __glXGetCurrentContext(); if (gc == NULL || gc->vtable->release_tex_image == NULL) return; gc->vtable->release_tex_image(dpy, drawable, buffer); } /*@}*/ #endif /* GLX_USE_APPLEGL */ /** * \c strdup is actually not a standard ANSI C or POSIX routine. * Irix will not define it if ANSI mode is in effect. * * \sa strdup */ _X_HIDDEN char * __glXstrdup(const char *str) { char *copy; copy = (char *) Xmalloc(strlen(str) + 1); if (!copy) return NULL; strcpy(copy, str); return copy; } /* ** glXGetProcAddress support */ struct name_address_pair { const char *Name; GLvoid *Address; }; #define GLX_FUNCTION(f) { # f, (GLvoid *) f } #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f } static const struct name_address_pair GLX_functions[] = { /*** GLX_VERSION_1_0 ***/ GLX_FUNCTION(glXChooseVisual), GLX_FUNCTION(glXCopyContext), GLX_FUNCTION(glXCreateContext), GLX_FUNCTION(glXCreateGLXPixmap), GLX_FUNCTION(glXDestroyContext), GLX_FUNCTION(glXDestroyGLXPixmap), GLX_FUNCTION(glXGetConfig), GLX_FUNCTION(glXGetCurrentContext), GLX_FUNCTION(glXGetCurrentDrawable), GLX_FUNCTION(glXIsDirect), GLX_FUNCTION(glXMakeCurrent), GLX_FUNCTION(glXQueryExtension), GLX_FUNCTION(glXQueryVersion), GLX_FUNCTION(glXSwapBuffers), GLX_FUNCTION(glXUseXFont), GLX_FUNCTION(glXWaitGL), GLX_FUNCTION(glXWaitX), /*** GLX_VERSION_1_1 ***/ GLX_FUNCTION(glXGetClientString), GLX_FUNCTION(glXQueryExtensionsString), GLX_FUNCTION(glXQueryServerString), /*** GLX_VERSION_1_2 ***/ GLX_FUNCTION(glXGetCurrentDisplay), /*** GLX_VERSION_1_3 ***/ GLX_FUNCTION(glXChooseFBConfig), GLX_FUNCTION(glXCreateNewContext), GLX_FUNCTION(glXCreatePbuffer), GLX_FUNCTION(glXCreatePixmap), GLX_FUNCTION(glXCreateWindow), GLX_FUNCTION(glXDestroyPbuffer), GLX_FUNCTION(glXDestroyPixmap), GLX_FUNCTION(glXDestroyWindow), GLX_FUNCTION(glXGetCurrentReadDrawable), GLX_FUNCTION(glXGetFBConfigAttrib), GLX_FUNCTION(glXGetFBConfigs), GLX_FUNCTION(glXGetSelectedEvent), GLX_FUNCTION(glXGetVisualFromFBConfig), GLX_FUNCTION(glXMakeContextCurrent), GLX_FUNCTION(glXQueryContext), GLX_FUNCTION(glXQueryDrawable), GLX_FUNCTION(glXSelectEvent), #ifndef GLX_USE_APPLEGL /*** GLX_SGI_swap_control ***/ GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI), /*** GLX_SGI_video_sync ***/ GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI), GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI), /*** GLX_SGI_make_current_read ***/ GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent), GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable), /*** GLX_EXT_import_context ***/ GLX_FUNCTION(glXFreeContextEXT), GLX_FUNCTION(glXGetContextIDEXT), GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay), GLX_FUNCTION(glXImportContextEXT), GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext), #endif /*** GLX_SGIX_fbconfig ***/ GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib), GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig), GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX), GLX_FUNCTION(glXCreateContextWithConfigSGIX), GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig), GLX_FUNCTION(glXGetFBConfigFromVisualSGIX), #ifndef GLX_USE_APPLEGL /*** GLX_SGIX_pbuffer ***/ GLX_FUNCTION(glXCreateGLXPbufferSGIX), GLX_FUNCTION(glXDestroyGLXPbufferSGIX), GLX_FUNCTION(glXQueryGLXPbufferSGIX), GLX_FUNCTION(glXSelectEventSGIX), GLX_FUNCTION(glXGetSelectedEventSGIX), /*** GLX_SGIX_swap_group ***/ GLX_FUNCTION2(glXJoinSwapGroupSGIX, __glXJoinSwapGroupSGIX), /*** GLX_SGIX_swap_barrier ***/ GLX_FUNCTION2(glXBindSwapBarrierSGIX, __glXBindSwapBarrierSGIX), GLX_FUNCTION2(glXQueryMaxSwapBarriersSGIX, __glXQueryMaxSwapBarriersSGIX), /*** GLX_MESA_copy_sub_buffer ***/ GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA), /*** GLX_MESA_pixmap_colormap ***/ GLX_FUNCTION(glXCreateGLXPixmapMESA), /*** GLX_MESA_release_buffers ***/ GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA), /*** GLX_MESA_swap_control ***/ GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA), GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA), #endif /*** GLX_ARB_get_proc_address ***/ GLX_FUNCTION(glXGetProcAddressARB), /*** GLX 1.4 ***/ GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB), #ifndef GLX_USE_APPLEGL /*** GLX_OML_sync_control ***/ GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML), GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML), GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML), GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML), GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML), /*** GLX_EXT_texture_from_pixmap ***/ GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT), GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT), #endif #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) /*** DRI configuration ***/ GLX_FUNCTION(glXGetScreenDriver), GLX_FUNCTION(glXGetDriverConfig), #endif {NULL, NULL} /* end of list */ }; static const GLvoid * get_glx_proc_address(const char *funcName) { GLuint i; /* try static functions */ for (i = 0; GLX_functions[i].Name; i++) { if (strcmp(GLX_functions[i].Name, funcName) == 0) return GLX_functions[i].Address; } return NULL; } /** * Get the address of a named GL function. This is the pre-GLX 1.4 name for * \c glXGetProcAddress. * * \param procName Name of a GL or GLX function. * \returns A pointer to the named function * * \sa glXGetProcAddress */ _X_EXPORT void (*glXGetProcAddressARB(const GLubyte * procName)) (void) { typedef void (*gl_function) (void); gl_function f; /* Search the table of GLX and internal functions first. If that * fails and the supplied name could be a valid core GL name, try * searching the core GL function table. This check is done to prevent * DRI based drivers from searching the core GL function table for * internal API functions. */ f = (gl_function) get_glx_proc_address((const char *) procName); if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l') && (procName[2] != 'X')) { #ifdef GLX_SHARED_GLAPI f = (gl_function) __indirect_get_proc_address((const char *) procName); #endif if (!f) f = (gl_function) _glapi_get_proc_address((const char *) procName); if (!f) { struct glx_context *gc = __glXGetCurrentContext(); if (gc != NULL && gc->vtable->get_proc_address != NULL) f = gc->vtable->get_proc_address((const char *) procName); } } return f; } /** * Get the address of a named GL function. This is the GLX 1.4 name for * \c glXGetProcAddressARB. * * \param procName Name of a GL or GLX function. * \returns A pointer to the named function * * \sa glXGetProcAddressARB */ _X_EXPORT void (*glXGetProcAddress(const GLubyte * procName)) (void) #if defined(__GNUC__) && !defined(GLX_ALIAS_UNSUPPORTED) __attribute__ ((alias("glXGetProcAddressARB"))); #else { return glXGetProcAddressARB(procName); } #endif /* __GNUC__ */ #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) /** * Get the unadjusted system time (UST). Currently, the UST is measured in * microseconds since Epoc. The actual resolution of the UST may vary from * system to system, and the units may vary from release to release. * Drivers should not call this function directly. They should instead use * \c glXGetProcAddress to obtain a pointer to the function. * * \param ust Location to store the 64-bit UST * \returns Zero on success or a negative errno value on failure. * * \sa glXGetProcAddress, PFNGLXGETUSTPROC * * \since Internal API version 20030317. */ _X_HIDDEN int __glXGetUST(int64_t * ust) { struct timeval tv; if (ust == NULL) { return -EFAULT; } if (gettimeofday(&tv, NULL) == 0) { ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec; return 0; } else { return -errno; } } #endif /* GLX_DIRECT_RENDERING */