/* $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. */ #include #include #include #include #include #ifndef MAP_FAILED #define MAP_FAILED ((void *)-1) #endif #include "imports.h" #define None 0 #include "dri_util.h" #include "drm_sarea.h" #include "utils.h" #ifndef GLX_OML_sync_control typedef GLboolean ( * PFNGLXGETMSCRATEOMLPROC) (__DRIdrawable *drawable, int32_t *numerator, int32_t *denominator); #endif /** * This is just a token extension used to signal that the driver * supports setting a read drawable. */ const __DRIextension driReadDrawableExtension = { __DRI_READ_DRAWABLE, __DRI_READ_DRAWABLE_VERSION }; /** * 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"); } } GLint driIntersectArea( drm_clip_rect_t rect1, drm_clip_rect_t rect2 ) { if (rect2.x1 > rect1.x1) rect1.x1 = rect2.x1; if (rect2.x2 < rect1.x2) rect1.x2 = rect2.x2; if (rect2.y1 > rect1.y1) rect1.y1 = rect2.y1; if (rect2.y2 < rect1.y2) rect1.y2 = rect2.y2; if (rect1.x1 > rect1.x2 || rect1.y1 > rect1.y2) return 0; return (rect1.x2 - rect1.x1) * (rect1.y2 - rect1.y1); } /*****************************************************************/ /** \name Context (un)binding functions */ /*****************************************************************/ /*@{*/ /** * Unbind context. * * \param scrn the screen. * \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 int driUnbindContext(__DRIcontext *pcp) { __DRIscreen *psp; __DRIdrawable *pdp; __DRIdrawable *prp; /* ** Assume error checking is done properly in glXMakeCurrent before ** calling driUnbindContext. */ if (pcp == NULL) return GL_FALSE; psp = pcp->driScreenPriv; pdp = pcp->driDrawablePriv; prp = pcp->driReadablePriv; /* 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. */ static int driBindContext(__DRIcontext *pcp, __DRIdrawable *pdp, __DRIdrawable *prp) { __DRIscreenPrivate *psp = pcp->driScreenPriv; /* ** Assume error checking is done properly in glXMakeCurrent before ** calling driBindContext. */ if (pcp == NULL || pdp == None || prp == None) return GL_FALSE; /* Bind the drawable to the context */ pcp->driDrawablePriv = pdp; pcp->driReadablePriv = prp; 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 (psp->dri2.enabled) { __driParseEvents(pcp, pdp); __driParseEvents(pcp, prp); } else { 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); } if ((pdp != prp) && (!prp->pStamp || *prp->pStamp != prp->lastStamp)) { DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); __driUtilUpdateDrawableInfo(prp); DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); } } /* Call device-specific MakeCurrent */ (*psp->DriverAPI.MakeCurrent)(pcp, pdp, prp); return GL_TRUE; } /*@}*/ /*****************************************************************/ /** \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 __DRIinterfaceMethods::getDrawableInfo. * 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 = pdp->driScreenPriv; __DRIcontextPrivate *pcp = pdp->driContextPriv; if (!pcp || ((pdp != pcp->driDrawablePriv) && (pdp != pcp->driReadablePriv))) { /* ERROR!!! * ...but we must ignore it. There can be many contexts bound to a * drawable. */ } if (pdp->pClipRects) { _mesa_free(pdp->pClipRects); pdp->pClipRects = NULL; } if (pdp->pBackClipRects) { _mesa_free(pdp->pBackClipRects); pdp->pBackClipRects = NULL; } DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); if (! (*psp->getDrawableInfo->getDrawableInfo)(pdp, &pdp->index, &pdp->lastStamp, &pdp->x, &pdp->y, &pdp->w, &pdp->h, &pdp->numClipRects, &pdp->pClipRects, &pdp->backX, &pdp->backY, &pdp->numBackClipRects, &pdp->pBackClipRects, pdp->loaderPrivate)) { /* 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); } int __driParseEvents(__DRIcontextPrivate *pcp, __DRIdrawablePrivate *pdp) { __DRIscreenPrivate *psp = pdp->driScreenPriv; __DRIDrawableConfigEvent *dc, *last_dc; __DRIBufferAttachEvent *ba, *last_ba; unsigned int tail, mask, *p, end, total, size, changed; unsigned char *data; size_t rect_size; /* Check for wraparound. */ if (pcp && psp->dri2.buffer->prealloc - pdp->dri2.tail > psp->dri2.buffer->size) { /* If prealloc overlaps into what we just parsed, the * server overwrote it and we have to reset our tail * pointer. */ DRM_UNLOCK(psp->fd, psp->lock, pcp->hHWContext); (*psp->dri2.loader->reemitDrawableInfo)(pdp, &pdp->dri2.tail, pdp->loaderPrivate); DRM_LIGHT_LOCK(psp->fd, psp->lock, pcp->hHWContext); } total = psp->dri2.buffer->head - pdp->dri2.tail; mask = psp->dri2.buffer->size - 1; end = psp->dri2.buffer->head; data = psp->dri2.buffer->data; changed = 0; last_dc = NULL; last_ba = NULL; for (tail = pdp->dri2.tail; tail != end; tail += size) { p = (unsigned int *) (data + (tail & mask)); size = DRI2_EVENT_SIZE(*p); if (size > total || (tail & mask) + size > psp->dri2.buffer->size) { /* illegal data, bail out. */ fprintf(stderr, "illegal event size\n"); break; } switch (DRI2_EVENT_TYPE(*p)) { case DRI2_EVENT_DRAWABLE_CONFIG: dc = (__DRIDrawableConfigEvent *) p; if (dc->drawable == pdp->dri2.drawable_id) last_dc = dc; break; case DRI2_EVENT_BUFFER_ATTACH: ba = (__DRIBufferAttachEvent *) p; if (ba->drawable == pdp->dri2.drawable_id && ba->buffer.attachment == DRI_DRAWABLE_BUFFER_FRONT_LEFT) last_ba = ba; break; } } if (last_dc) { if (pdp->w != last_dc->width || pdp->h != last_dc->height) changed = 1; pdp->x = last_dc->x; pdp->y = last_dc->y; pdp->w = last_dc->width; pdp->h = last_dc->height; pdp->backX = 0; pdp->backY = 0; pdp->numBackClipRects = 1; pdp->pBackClipRects[0].x1 = 0; pdp->pBackClipRects[0].y1 = 0; pdp->pBackClipRects[0].x2 = pdp->w; pdp->pBackClipRects[0].y2 = pdp->h; pdp->numClipRects = last_dc->num_rects; _mesa_free(pdp->pClipRects); rect_size = last_dc->num_rects * sizeof last_dc->rects[0]; pdp->pClipRects = _mesa_malloc(rect_size); memcpy(pdp->pClipRects, last_dc->rects, rect_size); } /* We only care about the most recent drawable config. */ if (last_dc && changed) (*psp->DriverAPI.HandleDrawableConfig)(pdp, pcp, last_dc); /* Front buffer attachments are special, they typically mean that * we're rendering to a redirected window (or a child window of a * redirected window) and that it got resized. Resizing the root * window on randr events is a special case of this. Other causes * may be a window transitioning between redirected and * non-redirected, or a window getting reparented between parents * with different window pixmaps (eg two redirected windows). * These events are special in that the X server allocates the * buffer and that the buffer may be shared by other child * windows. When our window share the window pixmap with its * parent, drawable config events doesn't affect the front buffer. * We only care about the last such event in the buffer; in fact, * older events will refer to invalid buffer objects.*/ if (last_ba) (*psp->DriverAPI.HandleBufferAttach)(pdp, pcp, last_ba); /* If there was a drawable config event in the buffer and it * changed the size of the window, all buffer auxiliary buffer * attachments prior to that are invalid (as opposed to the front * buffer case discussed above). In that case we can start * looking for buffer attachment after the last drawable config * event. If there is no drawable config event in this batch of * events, we have to assume that the last batch might have had * one and process all buffer attach events.*/ if (last_dc && changed) tail = (unsigned char *) last_dc - data; else tail = pdp->dri2.tail; for ( ; tail != end; tail += size) { ba = (__DRIBufferAttachEvent *) (data + (tail & mask)); size = DRI2_EVENT_SIZE(ba->event_header); if (DRI2_EVENT_TYPE(ba->event_header) != DRI2_EVENT_BUFFER_ATTACH) continue; if (ba->drawable != pdp->dri2.drawable_id) continue; if (last_ba == ba) continue; (*psp->DriverAPI.HandleBufferAttach)(pdp, pcp, ba); changed = 1; } pdp->dri2.tail = tail; return changed || last_ba; } /*@}*/ /*****************************************************************/ /** \name GLX callbacks */ /*****************************************************************/ /*@{*/ static void driReportDamage(__DRIdrawable *pdp, struct drm_clip_rect *pClipRects, int numClipRects) { __DRIscreen *psp = pdp->driScreenPriv; /* Check that we actually have the new damage report method */ if (psp->dri2.enabled) { (*psp->dri2.loader->postDamage)(pdp, pClipRects, numClipRects, pdp->loaderPrivate); } else if (psp->damage) { /* Report the damage. Currently, all our drivers draw * directly to the front buffer, so we report the damage there * rather than to the backing storein (if any). */ (*psp->damage->reportDamage)(pdp, pdp->x, pdp->y, pClipRects, numClipRects, GL_TRUE, pdp->loaderPrivate); } } /** * Swap buffers. * * \param drawablePrivate opaque pointer to the per-drawable private info. * * \internal * This function calls __DRIdrawablePrivate::swapBuffers. * * Is called directly from glXSwapBuffers(). */ static void driSwapBuffers(__DRIdrawable *dPriv) { __DRIscreen *psp = dPriv->driScreenPriv; if (!dPriv->numClipRects) return; if (psp->dri2.enabled) __driParseEvents(NULL, dPriv); psp->DriverAPI.SwapBuffers(dPriv); driReportDamage(dPriv, dPriv->pClipRects, dPriv->numClipRects); } static int driDrawableGetMSC( __DRIscreen *sPriv, __DRIdrawable *dPriv, int64_t *msc ) { return sPriv->DriverAPI.GetDrawableMSC(sPriv, dPriv, msc); } static int driWaitForMSC(__DRIdrawable *dPriv, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t * msc, int64_t * sbc) { __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; } const __DRImediaStreamCounterExtension driMediaStreamCounterExtension = { { __DRI_MEDIA_STREAM_COUNTER, __DRI_MEDIA_STREAM_COUNTER_VERSION }, driWaitForMSC, driDrawableGetMSC, }; static void driCopySubBuffer(__DRIdrawable *dPriv, int x, int y, int w, int h) { drm_clip_rect_t rect; rect.x1 = x; rect.y1 = dPriv->h - y - h; rect.x2 = x + w; rect.y2 = rect.y1 + h; driReportDamage(dPriv, &rect, 1); dPriv->driScreenPriv->DriverAPI.CopySubBuffer(dPriv, x, y, w, h); } const __DRIcopySubBufferExtension driCopySubBufferExtension = { { __DRI_COPY_SUB_BUFFER, __DRI_COPY_SUB_BUFFER_VERSION }, driCopySubBuffer }; static void driSetSwapInterval(__DRIdrawable *dPriv, unsigned int interval) { dPriv->swap_interval = interval; } static unsigned int driGetSwapInterval(__DRIdrawable *dPriv) { return dPriv->swap_interval; } const __DRIswapControlExtension driSwapControlExtension = { { __DRI_SWAP_CONTROL, __DRI_SWAP_CONTROL_VERSION }, driSetSwapInterval, driGetSwapInterval }; /** * This is called via __DRIscreenRec's createNewDrawable pointer. */ static __DRIdrawable * driCreateNewDrawable(__DRIscreen *psp, const __DRIconfig *config, drm_drawable_t hwDrawable, int renderType, const int *attrs, void *data) { __DRIdrawable *pdp; /* Since pbuffers are not yet supported, no drawable attributes are * supported either. */ (void) attrs; pdp = _mesa_malloc(sizeof *pdp); if (!pdp) { return NULL; } pdp->loaderPrivate = data; pdp->hHWDrawable = hwDrawable; 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->vblSeq = 0; pdp->vblFlags = 0; pdp->driScreenPriv = psp; pdp->driContextPriv = &psp->dummyContextPriv; if (!(*psp->DriverAPI.CreateBuffer)(psp, pdp, &config->modes, renderType == GLX_PIXMAP_BIT)) { _mesa_free(pdp); return NULL; } pdp->msc_base = 0; /* This special default value is replaced with the configured * default value when the drawable is first bound to a direct * rendering context. */ pdp->swap_interval = (unsigned)-1; return pdp; } static __DRIdrawable * dri2CreateNewDrawable(__DRIscreen *screen, const __DRIconfig *config, unsigned int drawable_id, unsigned int head, void *data) { __DRIdrawable *pdraw; pdraw = driCreateNewDrawable(screen, config, 0, 0, NULL, data); if (!pdraw) return NULL; pdraw->dri2.drawable_id = drawable_id; pdraw->dri2.tail = head; pdraw->pBackClipRects = _mesa_malloc(sizeof *pdraw->pBackClipRects); return pdraw; } static void driDestroyDrawable(__DRIdrawable *pdp) { __DRIscreenPrivate *psp; if (pdp) { psp = pdp->driScreenPriv; (*psp->DriverAPI.DestroyBuffer)(pdp); if (pdp->pClipRects) { _mesa_free(pdp->pClipRects); pdp->pClipRects = NULL; } if (pdp->pBackClipRects) { _mesa_free(pdp->pBackClipRects); pdp->pBackClipRects = NULL; } _mesa_free(pdp); } } /*@}*/ /*****************************************************************/ /** \name Context handling functions */ /*****************************************************************/ /*@{*/ /** * Destroy the per-context private information. * * \internal * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls * drmDestroyContext(), and finally frees \p contextPrivate. */ static void driDestroyContext(__DRIcontext *pcp) { if (pcp) { (*pcp->driScreenPriv->DriverAPI.DestroyContext)(pcp); _mesa_free(pcp); } } /** * Create the per-drawable private driver information. * * \param render_type Type of rendering target. \c GLX_RGBA is the only * type likely to ever be supported for direct-rendering. * \param shared Context with which to share textures, etc. or NULL * * \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 * relevant information to __DriverAPIRec::CreateContext to create the * context. * */ static __DRIcontext * driCreateNewContext(__DRIscreen *psp, const __DRIconfig *config, int render_type, __DRIcontext *shared, drm_context_t hwContext, void *data) { __DRIcontext *pcp; void * const shareCtx = (shared != NULL) ? shared->driverPrivate : NULL; pcp = _mesa_malloc(sizeof *pcp); if (!pcp) return NULL; pcp->driScreenPriv = psp; pcp->driDrawablePriv = NULL; /* When the first context is created for a screen, initialize a "dummy" * context. */ if (!psp->dri2.enabled && !psp->dummyContextPriv.driScreenPriv) { 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! */ } pcp->hHWContext = hwContext; if ( !(*psp->DriverAPI.CreateContext)(&config->modes, pcp, shareCtx) ) { _mesa_free(pcp); return NULL; } return pcp; } static __DRIcontext * dri2CreateNewContext(__DRIscreen *screen, const __DRIconfig *config, __DRIcontext *shared, void *data) { drm_context_t hwContext; DRM_CAS_RESULT(ret); /* DRI2 doesn't use kernel with context IDs, we just need an ID that's * different from the kernel context ID to make drmLock() happy. */ do { hwContext = screen->dri2.lock->next_id; DRM_CAS(&screen->dri2.lock->next_id, hwContext, hwContext + 1, ret); } while (ret); return driCreateNewContext(screen, config, 0, shared, hwContext, data); } static int driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask) { return GL_FALSE; } /*@}*/ /*****************************************************************/ /** \name Screen handling functions */ /*****************************************************************/ /*@{*/ /** * Destroy the per-screen private information. * * \internal * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls * drmClose(), and finally frees \p screenPrivate. */ static void driDestroyScreen(__DRIscreen *psp) { 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); if (psp->dri2.enabled) { #ifdef TTM_API drmBOUnmap(psp->fd, &psp->dri2.sareaBO); drmBOUnreference(psp->fd, &psp->dri2.sareaBO); #endif } else { (void)drmUnmap((drmAddress)psp->pSAREA, SAREA_MAX); (void)drmUnmap((drmAddress)psp->pFB, psp->fbSize); (void)drmCloseOnce(psp->fd); } _mesa_free(psp); } } static void setupLoaderExtensions(__DRIscreen *psp, const __DRIextension **extensions) { int i; for (i = 0; extensions[i]; i++) { if (strcmp(extensions[i]->name, __DRI_GET_DRAWABLE_INFO) == 0) psp->getDrawableInfo = (__DRIgetDrawableInfoExtension *) extensions[i]; if (strcmp(extensions[i]->name, __DRI_DAMAGE) == 0) psp->damage = (__DRIdamageExtension *) extensions[i]; if (strcmp(extensions[i]->name, __DRI_SYSTEM_TIME) == 0) psp->systemTime = (__DRIsystemTimeExtension *) extensions[i]; if (strcmp(extensions[i]->name, __DRI_LOADER) == 0) psp->dri2.loader = (__DRIloaderExtension *) extensions[i]; } } /** * This is the bootstrap function for the driver. libGL supplies all of the * requisite information about the system, and the driver initializes itself. * This routine also fills in the linked list pointed to by \c driver_modes * with the \c __GLcontextModes that the driver can support for windows or * pbuffers. * * For legacy DRI. * * \param scrn Index of the screen * \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 extensions ?? * \param driver_modes Returns modes supported by the driver * \param loaderPrivate ?? * * \note There is no need to check the minimum API version in this * function. Since the name of this function is versioned, it is * impossible for a loader that is too old to even load this driver. */ static __DRIscreen * driCreateNewScreen(int scrn, const __DRIversion *ddx_version, const __DRIversion *dri_version, const __DRIversion *drm_version, const __DRIframebuffer *frame_buffer, drmAddress pSAREA, int fd, const __DRIextension **extensions, const __DRIconfig ***driver_modes, void *loaderPrivate) { static const __DRIextension *emptyExtensionList[] = { NULL }; __DRIscreen *psp; psp = _mesa_malloc(sizeof *psp); if (!psp) return NULL; setupLoaderExtensions(psp, extensions); /* ** 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->drm_version = *drm_version; psp->ddx_version = *ddx_version; psp->dri_version = *dri_version; psp->pSAREA = pSAREA; psp->lock = (drmLock *) &psp->pSAREA->lock; 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->fbBPP = psp->fbStride * 8 / frame_buffer->width; psp->extensions = emptyExtensionList; psp->fd = fd; psp->myNum = scrn; psp->dri2.enabled = GL_FALSE; /* ** 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; psp->DriverAPI = driDriverAPI; *driver_modes = driDriverAPI.InitScreen(psp); if (*driver_modes == NULL) { _mesa_free(psp); return NULL; } return psp; } /** * DRI2 */ static __DRIscreen * dri2CreateNewScreen(int scrn, int fd, unsigned int sarea_handle, const __DRIextension **extensions, const __DRIconfig ***driver_configs, void *data) { #ifdef TTM_API static const __DRIextension *emptyExtensionList[] = { NULL }; __DRIscreen *psp; unsigned int *p; drmVersionPtr version; if (driDriverAPI.InitScreen2 == NULL) return NULL; psp = _mesa_malloc(sizeof(*psp)); if (!psp) return NULL; setupLoaderExtensions(psp, extensions); version = drmGetVersion(fd); if (version) { psp->drm_version.major = version->version_major; psp->drm_version.minor = version->version_minor; psp->drm_version.patch = version->version_patchlevel; drmFreeVersion(version); } psp->extensions = emptyExtensionList; psp->fd = fd; psp->myNum = scrn; psp->dri2.enabled = GL_TRUE; if (drmBOReference(psp->fd, sarea_handle, &psp->dri2.sareaBO)) { fprintf(stderr, "Failed to reference DRI2 sarea BO\n"); _mesa_free(psp); return NULL; } if (drmBOMap(psp->fd, &psp->dri2.sareaBO, DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0, &psp->dri2.sarea)) { drmBOUnreference(psp->fd, &psp->dri2.sareaBO); _mesa_free(psp); return NULL; } p = psp->dri2.sarea; while (DRI2_SAREA_BLOCK_TYPE(*p)) { switch (DRI2_SAREA_BLOCK_TYPE(*p)) { case DRI2_SAREA_BLOCK_LOCK: psp->dri2.lock = (__DRILock *) p; break; case DRI2_SAREA_BLOCK_EVENT_BUFFER: psp->dri2.buffer = (__DRIEventBuffer *) p; break; } p = DRI2_SAREA_BLOCK_NEXT(p); } psp->lock = (drmLock *) &psp->dri2.lock->lock; psp->DriverAPI = driDriverAPI; *driver_configs = driDriverAPI.InitScreen2(psp); if (*driver_configs == NULL) { drmBOUnmap(psp->fd, &psp->dri2.sareaBO); drmBOUnreference(psp->fd, &psp->dri2.sareaBO); _mesa_free(psp); return NULL; } psp->DriverAPI = driDriverAPI; return psp; #else return NULL; #endif } static const __DRIextension **driGetExtensions(__DRIscreen *psp) { return psp->extensions; } /** Legacy DRI interface */ const __DRIlegacyExtension driLegacyExtension = { { __DRI_LEGACY, __DRI_LEGACY_VERSION }, driCreateNewScreen, driCreateNewDrawable, driCreateNewContext }; /** DRI2 interface */ const __DRIcoreExtension driCoreExtension = { { __DRI_CORE, __DRI_CORE_VERSION }, dri2CreateNewScreen, driDestroyScreen, driGetExtensions, driGetConfigAttrib, driIndexConfigAttrib, dri2CreateNewDrawable, driDestroyDrawable, driSwapBuffers, dri2CreateNewContext, driCopyContext, driDestroyContext, driBindContext, driUnbindContext }; /* This is the table of extensions that the loader will dlsym() for. */ PUBLIC const __DRIextension *__driDriverExtensions[] = { &driCoreExtension.base, &driLegacyExtension.base, NULL }; static int driFrameTracking(__DRIdrawable *drawable, GLboolean enable) { return GLX_BAD_CONTEXT; } static int driQueryFrameTracking(__DRIdrawable *dpriv, int64_t * sbc, int64_t * missedFrames, float * lastMissedUsage, float * usage) { __DRIswapInfo sInfo; int status; int64_t ust; __DRIscreenPrivate *psp = dpriv->driScreenPriv; status = dpriv->driScreenPriv->DriverAPI.GetSwapInfo( dpriv, & sInfo ); if ( status == 0 ) { *sbc = sInfo.swap_count; *missedFrames = sInfo.swap_missed_count; *lastMissedUsage = sInfo.swap_missed_usage; (*psp->systemTime->getUST)( & ust ); *usage = driCalculateSwapUsage( dpriv, sInfo.swap_ust, ust ); } return status; } const __DRIframeTrackingExtension driFrameTrackingExtension = { { __DRI_FRAME_TRACKING, __DRI_FRAME_TRACKING_VERSION }, driFrameTracking, driQueryFrameTracking }; /** * 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 ) { int32_t n; int32_t d; int interval; float usage = 1.0; __DRIscreenPrivate *psp = dPriv->driScreenPriv; if ( (*psp->systemTime->getMSCRate)(dPriv, &n, &d, dPriv->loaderPrivate) ) { interval = (dPriv->swap_interval != 0) ? dPriv->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; } /*@}*/