diff options
Diffstat (limited to 'src/mesa/drivers/dri/dri_client/dri_util.c')
| -rw-r--r-- | src/mesa/drivers/dri/dri_client/dri_util.c | 1654 |
1 files changed, 0 insertions, 1654 deletions
diff --git a/src/mesa/drivers/dri/dri_client/dri_util.c b/src/mesa/drivers/dri/dri_client/dri_util.c deleted file mode 100644 index 03d92c02f2..0000000000 --- a/src/mesa/drivers/dri/dri_client/dri_util.c +++ /dev/null @@ -1,1654 +0,0 @@ -/* $XFree86: xc/lib/GL/dri/dri_util.c,v 1.7 2003/04/28 17:01:25 dawes Exp $ */ -/** - * \file dri_util.c - * DRI utility functions. - * - * This module acts as glue between GLX and the actual hardware driver. A DRI - * driver doesn't really \e have to use any of this - it's optional. But, some - * useful stuff is done here that otherwise would have to be duplicated in most - * drivers. - * - * Basically, these utility functions take care of some of the dirty details of - * screen initialization, context creation, context binding, DRM setup, etc. - * - * These functions are compiled into each DRI driver so libGL.so knows nothing - * about them. - * - * \note - * When \c DRI_NEW_INTERFACE_ONLY is defined, code is built / not built so - * that only the "new" libGL-to-driver interfaces are supported. This breaks - * backwards compatability. However, this may be necessary when DRI drivers - * are built to be used in non-XFree86 environments. - * - * \todo There are still some places in the code that need to be wrapped with - * \c DRI_NEW_INTERFACE_ONLY. - */ - - -#ifdef GLX_DIRECT_RENDERING - -#include <inttypes.h> -#include <assert.h> -#include <stdarg.h> -#include <unistd.h> -#include <sys/mman.h> -#include <X11/Xlibint.h> -#include <Xext.h> -#include <extutil.h> -#include <stdio.h> -#include "dri_util.h" -#include "xf86dri.h" -#include "sarea.h" -#include "glcontextmodes.h" - -/*#define DRI_NEW_INTERFACE_ONLY*/ - -/** - * This is used in a couple of places that call \c driCreateNewDrawable. - */ -static const int empty_attribute_list[1] = { None }; - -/** - * Function used to determine if a drawable (window) still exists. Ideally - * this function comes from libGL. With older versions of libGL from XFree86 - * we can fall-back to an internal version. - * - * \sa __driWindowExists __glXWindowExists - */ -static PFNGLXWINDOWEXISTSPROC window_exists; - -typedef Bool (*PFNGLXCREATECONTEXTWITHCONFIGPROC)( Display*, int, int, void *, - drmContextPtr ); - -static PFNGLXCREATECONTEXTWITHCONFIGPROC create_context_with_config; - -/** - * Cached copy of the internal API version used by libGL and the client-side - * DRI driver. - */ -static int api_ver = 0; - -/* forward declarations */ -static int driQueryFrameTracking( Display * dpy, void * priv, - int64_t * sbc, int64_t * missedFrames, float * lastMissedUsage, - float * usage ); - -static void *driCreateNewDrawable(Display *dpy, const __GLcontextModes *modes, - GLXDrawable draw, __DRIdrawable *pdraw, int renderType, const int *attrs); - -static void driDestroyDrawable(Display *dpy, void *drawablePrivate); - - - - -#ifdef not_defined -static Bool driFeatureOn(const char *name) -{ - char *env = getenv(name); - - if (!env) return GL_FALSE; - if (!strcasecmp(env, "enable")) return GL_TRUE; - if (!strcasecmp(env, "1")) return GL_TRUE; - if (!strcasecmp(env, "on")) return GL_TRUE; - if (!strcasecmp(env, "true")) return GL_TRUE; - if (!strcasecmp(env, "t")) return GL_TRUE; - if (!strcasecmp(env, "yes")) return GL_TRUE; - if (!strcasecmp(env, "y")) return GL_TRUE; - - return GL_FALSE; -} -#endif /* not_defined */ - - -/** - * Print message to \c stderr if the \c LIBGL_DEBUG environment variable - * is set. - * - * Is called from the drivers. - * - * \param f \c printf like format string. - */ -void -__driUtilMessage(const char *f, ...) -{ - va_list args; - - if (getenv("LIBGL_DEBUG")) { - fprintf(stderr, "libGL error: \n"); - va_start(args, f); - vfprintf(stderr, f, args); - va_end(args); - fprintf(stderr, "\n"); - } -} - - -/*****************************************************************/ -/** \name Visual utility functions */ -/*****************************************************************/ -/*@{*/ - -#ifndef DRI_NEW_INTERFACE_ONLY -/** - * Find a \c __GLcontextModes structure matching the given visual ID. - * - * \param dpy Display to search for a matching configuration. - * \param scrn Screen number on \c dpy to be searched. - * \param vid Desired \c VisualID to find. - * - * \returns A pointer to a \c __GLcontextModes structure that matches \c vid, - * if found, or \c NULL if no match is found. - */ -static const __GLcontextModes * -findConfigMode(Display *dpy, int scrn, VisualID vid, - const __DRIscreen * pDRIScreen) -{ - if ( (pDRIScreen != NULL) && (pDRIScreen->private != NULL) ) { - const __DRIscreenPrivate * const psp = - (const __DRIscreenPrivate *) pDRIScreen->private; - - return _gl_context_modes_find_visual( psp->modes, vid ); - } - - return NULL; -} - - -/** - * This function is a hack to work-around old versions of libGL.so that - * do not export \c XF86DRICreateContextWithConfig. I would modify the - * code to just use this function, but the stand-alone driver (i.e., DRI - * drivers that are built to work without XFree86) shouldn't have to know - * about X structures like a \c Visual. - */ -static Bool -fake_XF86DRICreateContextWithConfig( Display* dpy, int screen, int configID, - XID* context, drmContextPtr hHWContext ) -{ - Visual vis; - - vis.visualid = configID; - return XF86DRICreateContext( dpy, screen, & vis, context, hHWContext ); -} -#endif /* DRI_NEW_INTERFACE_ONLY */ - -/*@}*/ - - -/*****************************************************************/ -/** \name Drawable list management */ -/*****************************************************************/ -/*@{*/ - -static Bool __driAddDrawable(void *drawHash, __DRIdrawable *pdraw) -{ - __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private; - - if (drmHashInsert(drawHash, pdp->draw, pdraw)) - return GL_FALSE; - - return GL_TRUE; -} - -static __DRIdrawable *__driFindDrawable(void *drawHash, GLXDrawable draw) -{ - int retcode; - __DRIdrawable *pdraw; - - retcode = drmHashLookup(drawHash, draw, (void **)&pdraw); - if (retcode) - return NULL; - - return pdraw; -} - -static void __driRemoveDrawable(void *drawHash, __DRIdrawable *pdraw) -{ - int retcode; - __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private; - - retcode = drmHashLookup(drawHash, pdp->draw, (void **)&pdraw); - if (!retcode) { /* Found */ - drmHashDelete(drawHash, pdp->draw); - } -} - -#ifndef DRI_NEW_INTERFACE_ONLY -static Bool __driWindowExistsFlag; - -static int __driWindowExistsErrorHandler(Display *dpy, XErrorEvent *xerr) -{ - if (xerr->error_code == BadWindow) { - __driWindowExistsFlag = GL_FALSE; - } - return 0; -} - -/** - * Determine if a window associated with a \c GLXDrawable exists on the - * X-server. - * - * \param dpy Display associated with the drawable to be queried. - * \param draw \c GLXDrawable to test. - * - * \returns \c GL_TRUE if a window exists that is associated with \c draw, - * otherwise \c GL_FALSE is returned. - * - * \warning This function is not currently thread-safe. - * - * \deprecated - * \c __glXWindowExists (from libGL) is prefered over this function. Starting - * with the next major release of XFree86, this function will be removed. - * Even now this function is no longer directly called. Instead it is called - * via a function pointer if and only if \c __glXWindowExists does not exist. - * - * \sa __glXWindowExists glXGetProcAddress window_exists - */ -static Bool __driWindowExists(Display *dpy, GLXDrawable draw) -{ - XWindowAttributes xwa; - int (*oldXErrorHandler)(Display *, XErrorEvent *); - - XSync(dpy, GL_FALSE); - __driWindowExistsFlag = GL_TRUE; - oldXErrorHandler = XSetErrorHandler(__driWindowExistsErrorHandler); - XGetWindowAttributes(dpy, draw, &xwa); /* dummy request */ - XSetErrorHandler(oldXErrorHandler); - return __driWindowExistsFlag; -} -#endif /* DRI_NEW_INTERFACE_ONLY */ - -/** - * Find drawables in the local hash that have been destroyed on the - * server. - * - * \param drawHash Hash-table containing all know drawables. - */ -static void __driGarbageCollectDrawables(void *drawHash) -{ - GLXDrawable draw; - __DRIdrawable *pdraw; - Display *dpy; - - if (drmHashFirst(drawHash, &draw, (void **)&pdraw)) { - do { - __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private; - dpy = pdp->driScreenPriv->display; - if (! (*window_exists)(dpy, draw)) { - /* Destroy the local drawable data in the hash table, if the - drawable no longer exists in the Xserver */ - __driRemoveDrawable(drawHash, pdraw); - (*pdraw->destroyDrawable)(dpy, pdraw->private); - Xfree(pdraw); - } - } while (drmHashNext(drawHash, &draw, (void **)&pdraw)); - } -} - -/*@}*/ - - -/*****************************************************************/ -/** \name Context (un)binding functions */ -/*****************************************************************/ -/*@{*/ - -/** - * Unbind context. - * - * \param dpy the display handle. - * \param scrn the screen number. - * \param draw drawable. - * \param read Current reading drawable. - * \param gc context. - * - * \return \c GL_TRUE on success, or \c GL_FALSE on failure. - * - * \internal - * This function calls __DriverAPIRec::UnbindContext, and then decrements - * __DRIdrawablePrivateRec::refcount which must be non-zero for a successful - * return. - * - * While casting the opaque private pointers associated with the parameters - * into their respective real types it also assures they are not \c NULL. - */ -static Bool driUnbindContext3(Display *dpy, int scrn, - GLXDrawable draw, GLXDrawable read, - __DRIcontext *ctx) -{ - __DRIscreen *pDRIScreen; - __DRIdrawable *pdraw; - __DRIdrawable *pread; - __DRIcontextPrivate *pcp; - __DRIscreenPrivate *psp; - __DRIdrawablePrivate *pdp; - __DRIdrawablePrivate *prp; - - /* - ** Assume error checking is done properly in glXMakeCurrent before - ** calling driUnbindContext3. - */ - - if (ctx == NULL || draw == None || read == None) { - /* ERROR!!! */ - return GL_FALSE; - } - - pDRIScreen = __glXFindDRIScreen(dpy, scrn); - if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) { - /* ERROR!!! */ - return GL_FALSE; - } - - psp = (__DRIscreenPrivate *)pDRIScreen->private; - pcp = (__DRIcontextPrivate *)ctx->private; - - pdraw = __driFindDrawable(psp->drawHash, draw); - if (!pdraw) { - /* ERROR!!! */ - return GL_FALSE; - } - pdp = (__DRIdrawablePrivate *)pdraw->private; - - pread = __driFindDrawable(psp->drawHash, read); - if (!pread) { - /* ERROR!!! */ - return GL_FALSE; - } - prp = (__DRIdrawablePrivate *)pread->private; - - - /* Let driver unbind drawable from context */ - (*psp->DriverAPI.UnbindContext)(pcp); - - - if (pdp->refcount == 0) { - /* ERROR!!! */ - return GL_FALSE; - } - - pdp->refcount--; - - if (prp != pdp) { - if (prp->refcount == 0) { - /* ERROR!!! */ - return GL_FALSE; - } - - prp->refcount--; - } - - - /* XXX this is disabled so that if we call SwapBuffers on an unbound - * window we can determine the last context bound to the window and - * use that context's lock. (BrianP, 2-Dec-2000) - */ -#if 0 - /* Unbind the drawable */ - pcp->driDrawablePriv = NULL; - pdp->driContextPriv = &psp->dummyContextPriv; -#endif - - return GL_TRUE; -} - - -/** - * This function takes both a read buffer and a draw buffer. This is needed - * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent - * function. - * - * \bug This function calls \c driCreateNewDrawable in two places with the - * \c renderType hard-coded to \c GLX_WINDOW_BIT. Some checking might - * be needed in those places when support for pbuffers and / or pixmaps - * is added. Is it safe to assume that the drawable is a window? - */ -static Bool DoBindContext(Display *dpy, - GLXDrawable draw, GLXDrawable read, - __DRIcontext *ctx, const __GLcontextModes * modes, - __DRIscreenPrivate *psp) -{ - __DRIdrawable *pdraw; - __DRIdrawablePrivate *pdp; - __DRIdrawable *pread; - __DRIdrawablePrivate *prp; - __DRIcontextPrivate * const pcp = ctx->private; - - - /* Find the _DRIdrawable which corresponds to the writing GLXDrawable */ - pdraw = __driFindDrawable(psp->drawHash, draw); - if (!pdraw) { - /* Allocate a new drawable */ - pdraw = (__DRIdrawable *)Xmalloc(sizeof(__DRIdrawable)); - if (!pdraw) { - /* ERROR!!! */ - return GL_FALSE; - } - - /* Create a new drawable */ - driCreateNewDrawable(dpy, modes, draw, pdraw, GLX_WINDOW_BIT, - empty_attribute_list); - if (!pdraw->private) { - /* ERROR!!! */ - Xfree(pdraw); - return GL_FALSE; - } - - } - pdp = (__DRIdrawablePrivate *) pdraw->private; - - /* Find the _DRIdrawable which corresponds to the reading GLXDrawable */ - if (read == draw) { - /* read buffer == draw buffer */ - prp = pdp; - } - else { - pread = __driFindDrawable(psp->drawHash, read); - if (!pread) { - /* Allocate a new drawable */ - pread = (__DRIdrawable *)Xmalloc(sizeof(__DRIdrawable)); - if (!pread) { - /* ERROR!!! */ - return GL_FALSE; - } - - /* Create a new drawable */ - driCreateNewDrawable(dpy, modes, read, pread, GLX_WINDOW_BIT, - empty_attribute_list); - if (!pread->private) { - /* ERROR!!! */ - Xfree(pread); - return GL_FALSE; - } - } - prp = (__DRIdrawablePrivate *) pread->private; - } - - /* Bind the drawable to the context */ - pcp->driDrawablePriv = pdp; - pdp->driContextPriv = pcp; - pdp->refcount++; - if ( pdp != prp ) { - prp->refcount++; - } - - /* - ** Now that we have a context associated with this drawable, we can - ** initialize the drawable information if has not been done before. - */ - if (!pdp->pStamp || *pdp->pStamp != pdp->lastStamp) { - DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); - __driUtilUpdateDrawableInfo(pdp); - DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); - } - - /* Call device-specific MakeCurrent */ - (*psp->DriverAPI.MakeCurrent)(pcp, pdp, prp); - - return GL_TRUE; -} - - -/** - * This function takes both a read buffer and a draw buffer. This is needed - * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent - * function. - */ -static Bool driBindContext3(Display *dpy, int scrn, - GLXDrawable draw, GLXDrawable read, - __DRIcontext * ctx) -{ - __DRIscreen *pDRIScreen; - - /* - ** Assume error checking is done properly in glXMakeCurrent before - ** calling driBindContext. - */ - - if (ctx == NULL || draw == None || read == None) { - /* ERROR!!! */ - return GL_FALSE; - } - - pDRIScreen = __glXFindDRIScreen(dpy, scrn); - if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) { - /* ERROR!!! */ - return GL_FALSE; - } - - return DoBindContext( dpy, draw, read, ctx, ctx->mode, - (__DRIscreenPrivate *)pDRIScreen->private ); -} - - -#ifndef DRI_NEW_INTERFACE_ONLY -/** - * This function takes both a read buffer and a draw buffer. This is needed - * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent - * function. - */ -static Bool driBindContext2(Display *dpy, int scrn, - GLXDrawable draw, GLXDrawable read, - GLXContext gc) -{ - __DRIscreen *pDRIScreen; - const __GLcontextModes *modes; - - /* - ** Assume error checking is done properly in glXMakeCurrent before - ** calling driBindContext. - */ - - if (gc == NULL || draw == None || read == None) { - /* ERROR!!! */ - return GL_FALSE; - } - - pDRIScreen = __glXFindDRIScreen(dpy, scrn); - modes = (driCompareGLXAPIVersion( 20040317 ) >= 0) - ? gc->driContext.mode - : findConfigMode( dpy, scrn, gc->vid, pDRIScreen ); - - if ( modes == NULL ) { - /* ERROR!!! */ - return GL_FALSE; - } - - /* findConfigMode will return NULL if the DRI screen or screen private - * are NULL. - */ - assert( (pDRIScreen != NULL) && (pDRIScreen->private != NULL) ); - - return DoBindContext( dpy, draw, read, & gc->driContext, modes, - (__DRIscreenPrivate *)pDRIScreen->private ); -} - -static Bool driUnbindContext2(Display *dpy, int scrn, - GLXDrawable draw, GLXDrawable read, - GLXContext gc) -{ - return driUnbindContext3(dpy, scrn, draw, read, & gc->driContext); -} - -/* - * Simply call bind with the same GLXDrawable for the read and draw buffers. - */ -static Bool driBindContext(Display *dpy, int scrn, - GLXDrawable draw, GLXContext gc) -{ - return driBindContext2(dpy, scrn, draw, draw, gc); -} - - -/* - * Simply call bind with the same GLXDrawable for the read and draw buffers. - */ -static Bool driUnbindContext(Display *dpy, int scrn, - GLXDrawable draw, GLXContext gc, - int will_rebind) -{ - (void) will_rebind; - return driUnbindContext2( dpy, scrn, draw, draw, gc ); -} -#endif /* DRI_NEW_INTERFACE_ONLY */ - -/*@}*/ - - -/*****************************************************************/ -/** \name Drawable handling functions */ -/*****************************************************************/ -/*@{*/ - -/** - * Update private drawable information. - * - * \param pdp pointer to the private drawable information to update. - * - * This function basically updates the __DRIdrawablePrivate struct's - * cliprect information by calling \c __DRIDrawablePrivate::getInfo. This is - * usually called by the DRI_VALIDATE_DRAWABLE_INFO macro which - * compares the __DRIdrwablePrivate pStamp and lastStamp values. If - * the values are different that means we have to update the clipping - * info. - */ -void -__driUtilUpdateDrawableInfo(__DRIdrawablePrivate *pdp) -{ - __DRIscreenPrivate *psp; - __DRIcontextPrivate *pcp = pdp->driContextPriv; - - if (!pcp || (pdp != pcp->driDrawablePriv)) { - /* ERROR!!! */ - return; - } - - psp = pdp->driScreenPriv; - if (!psp) { - /* ERROR!!! */ - return; - } - - if (pdp->pClipRects) { - Xfree(pdp->pClipRects); - } - - if (pdp->pBackClipRects) { - Xfree(pdp->pBackClipRects); - } - - DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); - - if (!__driFindDrawable(psp->drawHash, pdp->draw) || - ! (*pdp->getInfo)(pdp->display, pdp->screen, pdp->draw, - &pdp->index, &pdp->lastStamp, - &pdp->x, &pdp->y, &pdp->w, &pdp->h, - &pdp->numClipRects, &pdp->pClipRects, - &pdp->backX, - &pdp->backY, - &pdp->numBackClipRects, - &pdp->pBackClipRects )) { - /* Error -- eg the window may have been destroyed. Keep going - * with no cliprects. - */ - pdp->pStamp = &pdp->lastStamp; /* prevent endless loop */ - pdp->numClipRects = 0; - pdp->pClipRects = NULL; - pdp->numBackClipRects = 0; - pdp->pBackClipRects = NULL; - } - else - pdp->pStamp = &(psp->pSAREA->drawableTable[pdp->index].stamp); - - DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); - -} - -/*@}*/ - -/*****************************************************************/ -/** \name GLX callbacks */ -/*****************************************************************/ -/*@{*/ - -/** - * Swap buffers. - * - * \param dpy the display handle. - * \param drawablePrivate opaque pointer to the per-drawable private info. - * - * \internal - * This function calls __DRIdrawablePrivate::swapBuffers. - * - * Is called directly from glXSwapBuffers(). - */ -static void driSwapBuffers( Display *dpy, void *drawablePrivate ) -{ - __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePrivate; - dPriv->swapBuffers(dPriv); - (void) dpy; -} - -/** - * Called directly from a number of higher-level GLX functions. - */ -static int driGetMSC( void *screenPrivate, int64_t *msc ) -{ - __DRIscreenPrivate *sPriv = (__DRIscreenPrivate *) screenPrivate; - - return sPriv->DriverAPI.GetMSC( sPriv, msc ); -} - -/** - * Called directly from a number of higher-level GLX functions. - */ -static int driGetSBC( Display *dpy, void *drawablePrivate, int64_t *sbc ) -{ - __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePrivate; - __DRIswapInfo sInfo; - int status; - - - status = dPriv->driScreenPriv->DriverAPI.GetSwapInfo( dPriv, & sInfo ); - *sbc = sInfo.swap_count; - - return status; -} - -static int driWaitForSBC( Display * dpy, void *drawablePriv, - int64_t target_sbc, - int64_t * msc, int64_t * sbc ) -{ - __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePriv; - - return dPriv->driScreenPriv->DriverAPI.WaitForSBC( dPriv, target_sbc, - msc, sbc ); -} - -static int driWaitForMSC( Display * dpy, void *drawablePriv, - int64_t target_msc, - int64_t divisor, int64_t remainder, - int64_t * msc, int64_t * sbc ) -{ - __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePriv; - __DRIswapInfo sInfo; - int status; - - - status = dPriv->driScreenPriv->DriverAPI.WaitForMSC( dPriv, target_msc, - divisor, remainder, - msc ); - - /* GetSwapInfo() may not be provided by the driver if GLX_SGI_video_sync - * is supported but GLX_OML_sync_control is not. Therefore, don't return - * an error value if GetSwapInfo() is not implemented. - */ - if ( status == 0 - && dPriv->driScreenPriv->DriverAPI.GetSwapInfo ) { - status = dPriv->driScreenPriv->DriverAPI.GetSwapInfo( dPriv, & sInfo ); - *sbc = sInfo.swap_count; - } - - return status; -} - -static int64_t driSwapBuffersMSC( Display * dpy, void *drawablePriv, - int64_t target_msc, - int64_t divisor, int64_t remainder ) -{ - __DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePriv; - - return dPriv->driScreenPriv->DriverAPI.SwapBuffersMSC( dPriv, target_msc, - divisor, - remainder ); -} - - -/** - * This is called via __DRIscreenRec's createNewDrawable pointer. - */ -static void *driCreateNewDrawable(Display *dpy, - const __GLcontextModes *modes, - GLXDrawable draw, - __DRIdrawable *pdraw, - int renderType, - const int *attrs) -{ - __DRIscreen * const pDRIScreen = __glXFindDRIScreen(dpy, modes->screen); - __DRIscreenPrivate *psp; - __DRIdrawablePrivate *pdp; - - - /* Since pbuffers are not yet supported, no drawable attributes are - * supported either. - */ - (void) attrs; - - if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) { - return NULL; - } - - pdp = (__DRIdrawablePrivate *)Xmalloc(sizeof(__DRIdrawablePrivate)); - if (!pdp) { - return NULL; - } - - if (!XF86DRICreateDrawable(dpy, modes->screen, draw, &pdp->hHWDrawable)) { - Xfree(pdp); - return NULL; - } - - pdp->draw = draw; - pdp->pdraw = pdraw; - pdp->refcount = 0; - pdp->pStamp = NULL; - pdp->lastStamp = 0; - pdp->index = 0; - pdp->x = 0; - pdp->y = 0; - pdp->w = 0; - pdp->h = 0; - pdp->numClipRects = 0; - pdp->numBackClipRects = 0; - pdp->pClipRects = NULL; - pdp->pBackClipRects = NULL; - pdp->display = dpy; - pdp->screen = modes->screen; - - psp = (__DRIscreenPrivate *)pDRIScreen->private; - pdp->driScreenPriv = psp; - pdp->driContextPriv = &psp->dummyContextPriv; - - pdp->getInfo = (GetDrawableInfo *) - glXGetProcAddress( (const GLubyte *) "__glXGetDrawableInfo" ); - if ( pdp->getInfo == NULL ) { - pdp->getInfo = XF86DRIGetDrawableInfo; - } - - if (!(*psp->DriverAPI.CreateBuffer)(psp, pdp, modes, - renderType == GLX_PIXMAP_BIT)) { - (void)XF86DRIDestroyDrawable(dpy, modes->screen, pdp->draw); - Xfree(pdp); - return NULL; - } - - pdraw->private = pdp; - pdraw->destroyDrawable = driDestroyDrawable; - pdraw->swapBuffers = driSwapBuffers; /* called by glXSwapBuffers() */ - - if ( driCompareGLXAPIVersion( 20030317 ) >= 0 ) { - pdraw->getSBC = driGetSBC; - pdraw->waitForSBC = driWaitForSBC; - pdraw->waitForMSC = driWaitForMSC; - pdraw->swapBuffersMSC = driSwapBuffersMSC; - pdraw->frameTracking = NULL; - pdraw->queryFrameTracking = driQueryFrameTracking; - - /* This special default value is replaced with the configured - * default value when the drawable is first bound to a direct - * rendering context. */ - pdraw->swap_interval = (unsigned)-1; - } - - pdp->swapBuffers = psp->DriverAPI.SwapBuffers; - - /* Add pdraw to drawable list */ - if (!__driAddDrawable(psp->drawHash, pdraw)) { - /* ERROR!!! */ - (*pdraw->destroyDrawable)(dpy, pdp); - Xfree(pdp); - pdp = NULL; - pdraw->private = NULL; - } - - return (void *) pdp; -} - -static __DRIdrawable *driGetDrawable(Display *dpy, GLXDrawable draw, - void *screenPrivate) -{ - __DRIscreenPrivate *psp = (__DRIscreenPrivate *) screenPrivate; - - /* - ** Make sure this routine returns NULL if the drawable is not bound - ** to a direct rendering context! - */ - return __driFindDrawable(psp->drawHash, draw); -} - -static void driDestroyDrawable(Display *dpy, void *drawablePrivate) -{ - __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *) drawablePrivate; - __DRIscreenPrivate *psp = pdp->driScreenPriv; - int scrn = psp->myNum; - - if (pdp) { - (*psp->DriverAPI.DestroyBuffer)(pdp); - if ((*window_exists)(dpy, pdp->draw)) - (void)XF86DRIDestroyDrawable(dpy, scrn, pdp->draw); - if (pdp->pClipRects) { - Xfree(pdp->pClipRects); - pdp->pClipRects = NULL; - } - if (pdp->pBackClipRects) { - Xfree(pdp->pBackClipRects); - pdp->pBackClipRects = NULL; - } - Xfree(pdp); - } -} - -/*@}*/ - - -/*****************************************************************/ -/** \name Context handling functions */ -/*****************************************************************/ -/*@{*/ - -/** - * Destroy the per-context private information. - * - * \param dpy the display handle. - * \param scrn the screen number. - * \param contextPrivate opaque pointer to the per-drawable private info. - * - * \internal - * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls - * drmDestroyContext(), and finally frees \p contextPrivate. - */ -static void driDestroyContext(Display *dpy, int scrn, void *contextPrivate) -{ - __DRIcontextPrivate *pcp = (__DRIcontextPrivate *) contextPrivate; - - if (pcp) { - (*pcp->driScreenPriv->DriverAPI.DestroyContext)(pcp); - __driGarbageCollectDrawables(pcp->driScreenPriv->drawHash); - (void)XF86DRIDestroyContext(dpy, scrn, pcp->contextID); - Xfree(pcp); - } -} - - -/** - * Create the per-drawable private driver information. - * - * \param dpy The display handle. - * \param modes Mode used to create the new context. - * \param render_type Type of rendering target. \c GLX_RGBA is the only - * type likely to ever be supported for direct-rendering. - * \param sharedPrivate The shared context dependent methods or \c NULL if - * non-existent. - * \param pctx DRI context to receive the context dependent methods. - * - * \returns An opaque pointer to the per-context private information on - * success, or \c NULL on failure. - * - * \internal - * This function allocates and fills a __DRIcontextPrivateRec structure. It - * performs some device independent initialization and passes all the - * relevent information to __DriverAPIRec::CreateContext to create the - * context. - * - */ -static void * -driCreateNewContext(Display *dpy, const __GLcontextModes *modes, - int render_type, void *sharedPrivate, __DRIcontext *pctx) -{ - __DRIscreen *pDRIScreen; - __DRIcontextPrivate *pcp; - __DRIcontextPrivate *pshare = (__DRIcontextPrivate *) sharedPrivate; - __DRIscreenPrivate *psp; - void * const shareCtx = (pshare != NULL) ? pshare->driverPrivate : NULL; - - pDRIScreen = __glXFindDRIScreen(dpy, modes->screen); - if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) { - /* ERROR!!! */ - return NULL; - } - - psp = (__DRIscreenPrivate *)pDRIScreen->private; - - pcp = (__DRIcontextPrivate *)Xmalloc(sizeof(__DRIcontextPrivate)); - if (!pcp) { - return NULL; - } - - if (! (*create_context_with_config)(dpy, modes->screen, modes->fbconfigID, - &pcp->contextID, &pcp->hHWContext)) { - Xfree(pcp); - return NULL; - } - - pcp->display = dpy; - pcp->driScreenPriv = psp; - pcp->driDrawablePriv = NULL; - - /* When the first context is created for a screen, initialize a "dummy" - * context. - */ - - if (!psp->dummyContextPriv.driScreenPriv) { - psp->dummyContextPriv.contextID = 0; - psp->dummyContextPriv.hHWContext = psp->pSAREA->dummy_context; - psp->dummyContextPriv.driScreenPriv = psp; - psp->dummyContextPriv.driDrawablePriv = NULL; - psp->dummyContextPriv.driverPrivate = NULL; - /* No other fields should be used! */ - } - - pctx->destroyContext = driDestroyContext; -#ifdef DRI_NEW_INTERFACE_ONLY - pctx->bindContext = NULL; - pctx->unbindContext = NULL; - pctx->bindContext2 = NULL; - pctx->unbindContext2 = NULL; - pctx->bindContex3 = driBindContext3; - pctx->unbindContext3 = driUnbindContext3; -#else - pctx->bindContext = driBindContext; - pctx->unbindContext = driUnbindContext; - if ( driCompareGLXAPIVersion( 20030606 ) >= 0 ) { - pctx->bindContext2 = driBindContext2; - pctx->unbindContext2 = driUnbindContext2; - } - - if ( driCompareGLXAPIVersion( 20040415 ) >= 0 ) { - pctx->bindContext3 = driBindContext3; - pctx->unbindContext3 = driUnbindContext3; - } -#endif - - if ( !(*psp->DriverAPI.CreateContext)(modes, pcp, shareCtx) ) { - (void)XF86DRIDestroyContext(dpy, modes->screen, pcp->contextID); - Xfree(pcp); - return NULL; - } - - __driGarbageCollectDrawables(pcp->driScreenPriv->drawHash); - - return pcp; -} - - -#ifndef DRI_NEW_INTERFACE_ONLY -/** - * Create the per-drawable private driver information. - * - * \param dpy the display handle. - * \param vis the visual information. - * \param sharedPrivate the shared context dependent methods or \c NULL if - * non-existent. - * \param pctx will receive the context dependent methods. - * - * \returns a opaque pointer to the per-context private information on success, or \c NULL - * on failure. - * - * \deprecated - * This function has been replaced by \c driCreateNewContext. In drivers - * built to work with XFree86, this function will continue to exist to support - * older versions of libGL. Starting with the next major relelase of XFree86, - * this function will be removed. - * - * \internal - * This function allocates and fills a __DRIcontextPrivateRec structure. It - * gets the visual, converts it into a __GLcontextModesRec and passes it - * to __DriverAPIRec::CreateContext to create the context. - */ -static void *driCreateContext(Display *dpy, XVisualInfo *vis, - void *sharedPrivate, __DRIcontext *pctx) -{ - __DRIscreen *pDRIScreen; - const __GLcontextModes *modes; - - pDRIScreen = __glXFindDRIScreen(dpy, vis->screen); - if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) { - /* ERROR!!! */ - return NULL; - } - - - /* Setup a __GLcontextModes struct corresponding to vis->visualid - * and create the rendering context. - */ - - modes = findConfigMode(dpy, vis->screen, vis->visualid, pDRIScreen); - return (modes == NULL) - ? NULL - : driCreateNewContext( dpy, modes, GLX_RGBA_TYPE, - sharedPrivate, pctx ); -} -#endif /* DRI_NEW_INTERFACE_ONLY */ - -/*@}*/ - - -/*****************************************************************/ -/** \name Screen handling functions */ -/*****************************************************************/ -/*@{*/ - -/** - * Destroy the per-screen private information. - * - * \param dpy the display handle. - * \param scrn the screen number. - * \param screenPrivate opaque pointer to the per-screen private information. - * - * \internal - * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls - * drmClose(), and finally frees \p screenPrivate. - */ -static void driDestroyScreen(Display *dpy, int scrn, void *screenPrivate) -{ - __DRIscreenPrivate *psp = (__DRIscreenPrivate *) screenPrivate; - - if (psp) { - /* No interaction with the X-server is possible at this point. This - * routine is called after XCloseDisplay, so there is no protocol - * stream open to the X-server anymore. - */ - - if (psp->DriverAPI.DestroyScreen) - (*psp->DriverAPI.DestroyScreen)(psp); - - (void)drmUnmap((drmAddress)psp->pSAREA, SAREA_MAX); - (void)drmUnmap((drmAddress)psp->pFB, psp->fbSize); - Xfree(psp->pDevPriv); - (void)drmClose(psp->fd); - if ( psp->modes != NULL ) { - _gl_context_modes_destroy( psp->modes ); - } - Xfree(psp); - } -} - - -/** - * Utility function used to create a new driver-private screen structure. - * - * \param dpy Display pointer - * \param scrn Index of the screen - * \param psc DRI screen data (not driver private) - * \param modes Linked list of known display modes. This list is, at a - * minimum, a list of modes based on the current display mode. - * These roughly match the set of available X11 visuals, but it - * need not be limited to X11! The calling libGL should create - * a list that will inform the driver of the current display - * mode (i.e., color buffer depth, depth buffer depth, etc.). - * \param ddx_version Version of the 2D DDX. This may not be meaningful for - * all drivers. - * \param dri_version Version of the "server-side" DRI. - * \param drm_version Version of the kernel DRM. - * \param frame_buffer Data describing the location and layout of the - * framebuffer. - * \param pSAREA Pointer the the SAREA. - * \param fd Device handle for the DRM. - * \param internal_api_version Version of the internal interface between the - * driver and libGL. - * \param driverAPI Driver API functions used by other routines in dri_util.c. - */ -__DRIscreenPrivate * -__driUtilCreateNewScreen(Display *dpy, int scrn, __DRIscreen *psc, - __GLcontextModes * modes, - const __DRIversion * ddx_version, - const __DRIversion * dri_version, - const __DRIversion * drm_version, - const __DRIframebuffer * frame_buffer, - drmAddress pSAREA, - int fd, - int internal_api_version, - const struct __DriverAPIRec *driverAPI) -{ - __DRIscreenPrivate *psp; - - -#ifdef DRI_NEW_INTERFACE_ONLY - if ( internal_api_version < 20040415 ) { - fprintf( stderr, "libGL error: libGL.so version (%08u) is too old. " - "20040415 or later is required.\n", internal_api_version ); - return NULL; - } -#else - if ( internal_api_version == 20031201 ) { - fprintf( stderr, "libGL error: libGL version 20031201 has critical " - "binary compatilibity bugs.\nlibGL error: You must upgrade " - "to use direct-rendering!\n" ); - return NULL; - } -#endif /* DRI_NEW_INTERFACE_ONLY */ - - - window_exists = (PFNGLXWINDOWEXISTSPROC) - glXGetProcAddress( (const GLubyte *) "__glXWindowExists" ); - - if ( window_exists == NULL ) { -#ifdef DRI_NEW_INTERFACE_ONLY - fprintf( stderr, "libGL error: libGL.so version (%08u) is too old. " - "20021128 or later is required.\n", internal_api_version ); - return NULL; -#else - window_exists = (PFNGLXWINDOWEXISTSPROC) __driWindowExists; -#endif /* DRI_NEW_INTERFACE_ONLY */ - } - - create_context_with_config = (PFNGLXCREATECONTEXTWITHCONFIGPROC) - glXGetProcAddress( (const GLubyte *) "__glXCreateContextWithConfig" ); - if ( create_context_with_config == NULL ) { -#ifdef DRI_NEW_INTERFACE_ONLY - fprintf( stderr, "libGL error: libGL.so version (%08u) is too old. " - "20031201 or later is required.\n", internal_api_version ); - return NULL; -#else - create_context_with_config = (PFNGLXCREATECONTEXTWITHCONFIGPROC) - fake_XF86DRICreateContextWithConfig; -#endif /* DRI_NEW_INTERFACE_ONLY */ - } - - api_ver = internal_api_version; - - psp = (__DRIscreenPrivate *)Xmalloc(sizeof(__DRIscreenPrivate)); - if (!psp) { - return NULL; - } - - /* Create the hash table */ - psp->drawHash = drmHashCreate(); - if ( psp->drawHash == NULL ) { - Xfree( psp ); - return NULL; - } - - psp->display = dpy; - psp->myNum = scrn; - psp->psc = psc; - psp->modes = modes; - - /* - ** NOT_DONE: This is used by the X server to detect when the client - ** has died while holding the drawable lock. The client sets the - ** drawable lock to this value. - */ - psp->drawLockID = 1; - - psp->drmMajor = drm_version->major; - psp->drmMinor = drm_version->minor; - psp->drmPatch = drm_version->patch; - psp->ddxMajor = ddx_version->major; - psp->ddxMinor = ddx_version->minor; - psp->ddxPatch = ddx_version->patch; - psp->driMajor = dri_version->major; - psp->driMinor = dri_version->minor; - psp->driPatch = dri_version->patch; - - /* install driver's callback functions */ - memcpy( &psp->DriverAPI, driverAPI, sizeof(struct __DriverAPIRec) ); - - psp->pSAREA = pSAREA; - - psp->pFB = frame_buffer->base; - psp->fbSize = frame_buffer->size; - psp->fbStride = frame_buffer->stride; - psp->fbWidth = frame_buffer->width; - psp->fbHeight = frame_buffer->height; - psp->devPrivSize = frame_buffer->dev_priv_size; - psp->pDevPriv = frame_buffer->dev_priv; - - psp->fd = fd; - - /* - ** Do not init dummy context here; actual initialization will be - ** done when the first DRI context is created. Init screen priv ptr - ** to NULL to let CreateContext routine that it needs to be inited. - */ - psp->dummyContextPriv.driScreenPriv = NULL; - - psc->destroyScreen = driDestroyScreen; -#ifndef DRI_NEW_INTERFACE_ONLY - psc->createContext = driCreateContext; -#else - psc->createConteext = NULL; -#endif - psc->createNewDrawable = driCreateNewDrawable; - psc->getDrawable = driGetDrawable; -#ifdef DRI_NEW_INTERFACE_ONLY - psc->getMSC = driGetMSC; - psc->createNewContext = driCreateNewContext; -#else - if ( driCompareGLXAPIVersion( 20030317 ) >= 0 ) { - psc->getMSC = driGetMSC; - - if ( driCompareGLXAPIVersion( 20030824 ) >= 0 ) { - psc->createNewContext = driCreateNewContext; - } - } -#endif - - if ( (psp->DriverAPI.InitDriver != NULL) - && !(*psp->DriverAPI.InitDriver)(psp) ) { - Xfree( psp ); - return NULL; - } - - - return psp; -} - - -#ifndef DRI_NEW_INTERFACE_ONLY -/** - * Utility function used to create a new driver-private screen structure. - * - * \param dpy Display pointer. - * \param scrn Index of the screen. - * \param psc DRI screen data (not driver private) - * \param numConfigs Number of visual configs pointed to by \c configs. - * \param configs Array of GLXvisualConfigs exported by the 2D driver. - * \param driverAPI Driver API functions used by other routines in dri_util.c. - * - * \deprecated - * This function has been replaced by \c __driUtilCreateNewScreen. In drivers - * built to work with XFree86, this function will continue to exist to support - * older versions of libGL. Starting with the next major relelase of XFree86, - * this function will be removed. - */ -__DRIscreenPrivate * -__driUtilCreateScreen(Display *dpy, int scrn, __DRIscreen *psc, - int numConfigs, __GLXvisualConfig *configs, - const struct __DriverAPIRec *driverAPI) -{ - int directCapable; - __DRIscreenPrivate *psp = NULL; - drmHandle hSAREA; - drmAddress pSAREA; - char *BusID; - __GLcontextModes *modes; - __GLcontextModes *temp; - int i; - __DRIversion ddx_version; - __DRIversion dri_version; - __DRIversion drm_version; - __DRIframebuffer framebuffer; - int fd = -1; - int status; - const char * err_msg; - const char * err_extra; - - - if (!XF86DRIQueryDirectRenderingCapable(dpy, scrn, &directCapable) - || !directCapable) { - return NULL; - } - - - /* Create the linked list of context modes, and populate it with the - * GLX visual information passed in by libGL. - */ - - modes = _gl_context_modes_create( numConfigs, sizeof(__GLcontextModes) ); - if ( modes == NULL ) { - return NULL; - } - - temp = modes; - for ( i = 0 ; i < numConfigs ; i++ ) { - assert( temp != NULL ); - _gl_copy_visual_to_context_mode( temp, & configs[i] ); - temp->screen = scrn; - - temp = temp->next; - } - - err_msg = "XF86DRIOpenConnection"; - err_extra = NULL; - - if (XF86DRIOpenConnection(dpy, scrn, &hSAREA, &BusID)) { - fd = drmOpen(NULL,BusID); - Xfree(BusID); /* No longer needed */ - - err_msg = "open DRM"; - err_extra = strerror( -fd ); - - if (fd >= 0) { - drmMagic magic; - - err_msg = "drmGetMagic"; - err_extra = NULL; - - if (!drmGetMagic(fd, &magic)) { - drmVersionPtr version = drmGetVersion(fd); - if (version) { - drm_version.major = version->version_major; - drm_version.minor = version->version_minor; - drm_version.patch = version->version_patchlevel; - drmFreeVersion(version); - } - else { - drm_version.major = -1; - drm_version.minor = -1; - drm_version.patch = -1; - } - - err_msg = "XF86DRIAuthConnection"; - if (XF86DRIAuthConnection(dpy, scrn, magic)) { - char *driverName; - - /* - * Get device name (like "tdfx") and the ddx version numbers. - * We'll check the version in each DRI driver's "createScreen" - * function. - */ - err_msg = "XF86DRIGetClientDriverName"; - if (XF86DRIGetClientDriverName(dpy, scrn, - &ddx_version.major, - &ddx_version.minor, - &ddx_version.patch, - &driverName)) { - - /* No longer needed. */ - Xfree( driverName ); - - /* - * Get the DRI X extension version. - */ - err_msg = "XF86DRIQueryVersion"; - if (XF86DRIQueryVersion(dpy, - &dri_version.major, - &dri_version.minor, - &dri_version.patch)) { - drmHandle hFB; - int junk; - - /* - * Get device-specific info. pDevPriv will point to a struct - * (such as DRIRADEONRec in xfree86/driver/ati/radeon_dri.h) - * that has information about the screen size, depth, pitch, - * ancilliary buffers, DRM mmap handles, etc. - */ - err_msg = "XF86DRIGetDeviceInfo"; - if (XF86DRIGetDeviceInfo(dpy, scrn, - &hFB, - &junk, - &framebuffer.size, - &framebuffer.stride, - &framebuffer.dev_priv_size, - &framebuffer.dev_priv)) { - framebuffer.width = DisplayWidth(dpy, scrn); - framebuffer.height = DisplayHeight(dpy, scrn); - - /* - * Map the framebuffer region. - */ - status = drmMap(fd, hFB, framebuffer.size, - (drmAddressPtr)&framebuffer.base); - - err_msg = "drmMap of framebuffer"; - err_extra = strerror( -status ); - - if ( status == 0 ) { - /* - * Map the SAREA region. Further mmap regions may be setup in - * each DRI driver's "createScreen" function. - */ - status = drmMap(fd, hSAREA, SAREA_MAX, - &pSAREA); - - err_msg = "drmMap of sarea"; - err_extra = strerror( -status ); - - if ( status == 0 ) { - PFNGLXGETINTERNALVERSIONPROC get_ver; - - get_ver = (PFNGLXGETINTERNALVERSIONPROC) - glXGetProcAddress( (const GLubyte *) "__glXGetInternalVersion" ); - - err_msg = "InitDriver"; - err_extra = NULL; - psp = __driUtilCreateNewScreen( dpy, scrn, psc, modes, - & ddx_version, - & dri_version, - & drm_version, - & framebuffer, - pSAREA, - fd, - (get_ver != NULL) ? (*get_ver)() : 1, - driverAPI ); - } - } - } - } - } - } - } - } - } - - if ( psp == NULL ) { - if ( pSAREA != MAP_FAILED ) { - (void)drmUnmap(pSAREA, SAREA_MAX); - } - - if ( framebuffer.base != MAP_FAILED ) { - (void)drmUnmap((drmAddress)framebuffer.base, framebuffer.size); - } - - if ( framebuffer.dev_priv != NULL ) { - Xfree(framebuffer.dev_priv); - } - - if ( fd >= 0 ) { - (void)drmClose(fd); - } - - if ( modes != NULL ) { - _gl_context_modes_destroy( modes ); - } - - (void)XF86DRICloseConnection(dpy, scrn); - - if ( err_extra != NULL ) { - fprintf(stderr, "libGL error: %s failed (%s)\n", err_msg, - err_extra); - } - else { - fprintf(stderr, "libGL error: %s failed\n", err_msg ); - } - - fprintf(stderr, "libGL error: reverting to (slow) indirect rendering\n"); - } - - return psp; -} -#endif /* DRI_NEW_INTERFACE_ONLY */ - - -/** - * Compare the current GLX API version with a driver supplied required version. - * - * The minimum required version is compared with the API version exported by - * the \c __glXGetInternalVersion function (in libGL.so). - * - * \param required_version Minimum required internal GLX API version. - * \return A tri-value return, as from strcmp is returned. A value less - * than, equal to, or greater than zero will be returned if the - * internal GLX API version is less than, equal to, or greater - * than \c required_version. - * - * \sa __glXGetInternalVersion(). - */ -int driCompareGLXAPIVersion( GLuint required_version ) -{ - if ( api_ver > required_version ) { - return 1; - } - else if ( api_ver == required_version ) { - return 0; - } - - return -1; -} - - -static int -driQueryFrameTracking( Display * dpy, void * priv, - int64_t * sbc, int64_t * missedFrames, - float * lastMissedUsage, float * usage ) -{ - static PFNGLXGETUSTPROC get_ust; - __DRIswapInfo sInfo; - int status; - int64_t ust; - __DRIdrawablePrivate * dpriv = (__DRIdrawablePrivate *) priv; - - if ( get_ust == NULL ) { - get_ust = (PFNGLXGETUSTPROC) glXGetProcAddress( (const GLubyte *) "__glXGetUST" ); - } - - status = dpriv->driScreenPriv->DriverAPI.GetSwapInfo( dpriv, & sInfo ); - if ( status == 0 ) { - *sbc = sInfo.swap_count; - *missedFrames = sInfo.swap_missed_count; - *lastMissedUsage = sInfo.swap_missed_usage; - - (*get_ust)( & ust ); - *usage = driCalculateSwapUsage( dpriv, sInfo.swap_ust, ust ); - } - - return status; -} - - -/** - * Calculate amount of swap interval used between GLX buffer swaps. - * - * The usage value, on the range [0,max], is the fraction of total swap - * interval time used between GLX buffer swaps is calculated. - * - * \f$p = t_d / (i * t_r)\f$ - * - * Where \f$t_d\f$ is the time since the last GLX buffer swap, \f$i\f$ is the - * swap interval (as set by \c glXSwapIntervalSGI), and \f$t_r\f$ time - * required for a single vertical refresh period (as returned by \c - * glXGetMscRateOML). - * - * See the documentation for the GLX_MESA_swap_frame_usage extension for more - * details. - * - * \param dPriv Pointer to the private drawable structure. - * \return If less than a single swap interval time period was required - * between GLX buffer swaps, a number greater than 0 and less than - * 1.0 is returned. If exactly one swap interval time period is - * required, 1.0 is returned, and if more than one is required then - * a number greater than 1.0 will be returned. - * - * \sa glXSwapIntervalSGI glXGetMscRateOML - * - * \todo Instead of caching the \c glXGetMscRateOML function pointer, would it - * be possible to cache the sync rate? - */ -float -driCalculateSwapUsage( __DRIdrawablePrivate *dPriv, int64_t last_swap_ust, - int64_t current_ust ) -{ - static PFNGLXGETMSCRATEOMLPROC get_msc_rate = NULL; - int32_t n; - int32_t d; - int interval; - float usage = 1.0; - - - if ( get_msc_rate == NULL ) { - get_msc_rate = (PFNGLXGETMSCRATEOMLPROC) - glXGetProcAddress( (const GLubyte *) "glXGetMscRateOML" ); - } - - if ( (get_msc_rate != NULL) - && get_msc_rate( dPriv->display, dPriv->draw, &n, &d ) ) { - interval = (dPriv->pdraw->swap_interval != 0) - ? dPriv->pdraw->swap_interval : 1; - - - /* We want to calculate - * (current_UST - last_swap_UST) / (interval * us_per_refresh). We get - * current_UST by calling __glXGetUST. last_swap_UST is stored in - * dPriv->swap_ust. interval has already been calculated. - * - * The only tricky part is us_per_refresh. us_per_refresh is - * 1000000 / MSC_rate. We know the MSC_rate is n / d. We can flip it - * around and say us_per_refresh = 1000000 * d / n. Since this goes in - * the denominator of the final calculation, we calculate - * (interval * 1000000 * d) and move n into the numerator. - */ - - usage = (current_ust - last_swap_ust); - usage *= n; - usage /= (interval * d); - usage /= 1000000.0; - } - - return usage; -} - -/*@}*/ - -#endif /* GLX_DIRECT_RENDERING */ |