/* $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 #include #ifndef MAP_FAILED #define MAP_FAILED ((void *)-1) #endif #include "imports.h" #define None 0 #include "dri_util.h" #include "drm_sarea.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 }; static void *driCreateNewDrawable(__DRIscreen *screen, const __GLcontextModes *modes, __DRIdrawable *pdraw, drm_drawable_t hwDrawable, int renderType, const int *attrs); static void driDestroyDrawable(__DRIdrawable *drawable); /** * 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 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 GLboolean driUnbindContext(__DRIcontext *ctx) { __DRIcontextPrivate *pcp; __DRIscreenPrivate *psp; __DRIdrawablePrivate *pdp; __DRIdrawablePrivate *prp; /* ** Assume error checking is done properly in glXMakeCurrent before ** calling driUnbindContext. */ if (ctx == NULL) return GL_FALSE; pcp = (__DRIcontextPrivate *)ctx->private; psp = (__DRIscreenPrivate *)pcp->driScreenPriv; pdp = (__DRIdrawablePrivate *)pcp->driDrawablePriv; prp = (__DRIdrawablePrivate *)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 GLboolean driBindContext(__DRIcontext * ctx, __DRIdrawable *pdraw, __DRIdrawable *pread) { __DRIdrawablePrivate *pdp; __DRIdrawablePrivate *prp; __DRIcontextPrivate * const pcp = ctx->private; __DRIscreenPrivate *psp = pcp->driScreenPriv; /* ** Assume error checking is done properly in glXMakeCurrent before ** calling driBindContext. */ if (ctx == NULL || pdraw == None || pread == None) return GL_FALSE; pdp = (__DRIdrawablePrivate *) pdraw->private; prp = (__DRIdrawablePrivate *) pread->private; /* 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(psp, pdp); __driParseEvents(psp, 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->pdraw, &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); } int __driParseEvents(__DRIscreenPrivate *psp, __DRIdrawablePrivate *pdp) { __DRIDrawableConfigEvent *dc, *last_dc; __DRIBufferAttachEvent *ba, *last_ba; unsigned int tail, mask, *p, end, total, size, changed; unsigned char *data; size_t rect_size; __DRIcontextPrivate *pcp = pdp->driContextPriv; if (pcp == NULL) return 0; /* Check for wraparound. */ if (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.core->reemitDrawableInfo)(pdp->pdraw); 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->hHWDrawable) last_dc = dc; break; case DRI2_EVENT_BUFFER_ATTACH: ba = (__DRIBufferAttachEvent *) p; if (ba->drawable == pdp->hHWDrawable && 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); if (changed) (*psp->DriverAPI.UpdateBuffer)(pdp, (unsigned int *) 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.UpdateBuffer)(pdp, (unsigned int *) last_ba); /* Like for buffer attachments, we only care about the most recent * drawable config. */ if (last_dc) (*psp->DriverAPI.UpdateBuffer)(pdp, (unsigned int *) last_dc); /* If there was a drawable config event in the buffer and it * changed the size of the window, all buffer auxillary 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->hHWDrawable) continue; if (last_ba == ba) continue; (*psp->DriverAPI.UpdateBuffer)(pdp, (unsigned int *) ba); } pdp->dri2.tail = tail; /* FIXME: Return whether we changed anything. This check always * returns true if we received events, but we could refine the * check to only return TRUE if the drawable actually changed. */ return total > 0; } /*@}*/ /*****************************************************************/ /** \name GLX callbacks */ /*****************************************************************/ /*@{*/ /** * 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 *drawable) { __DRIdrawablePrivate *dPriv = drawable->private; __DRIscreenPrivate *psp = dPriv->driScreenPriv; drm_clip_rect_t rect; if (!dPriv->numClipRects) return; dPriv->swapBuffers(dPriv); /* Check that we actually have the new damage report method */ if (psp->damage == NULL) return; /* Assume it's affecting the whole drawable for now */ rect.x1 = 0; rect.y1 = 0; rect.x2 = rect.x1 + dPriv->w; rect.y2 = rect.y1 + dPriv->h; /* Report the damage. Currently, all our drivers draw directly to the * front buffer, so we report the damage there rather than to the backing * store (if any). */ (*psp->damage->reportDamage)(dPriv->pdraw, dPriv->x, dPriv->y, &rect, 1, GL_TRUE); } static int driDrawableGetMSC( __DRIscreen *screen, __DRIdrawable *drawable, int64_t *msc ) { __DRIscreenPrivate *sPriv = screen->private; __DRIdrawablePrivate *dPriv = drawable->private; return sPriv->DriverAPI.GetDrawableMSC(sPriv, dPriv, msc); } static int driWaitForMSC(__DRIdrawable *drawable, int64_t target_msc, int64_t divisor, int64_t remainder, int64_t * msc, int64_t * sbc) { __DRIdrawablePrivate *dPriv = drawable->private; __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 *drawable, int x, int y, int w, int h) { __DRIdrawablePrivate *dPriv = drawable->private; 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 *drawable, unsigned int interval) { __DRIdrawablePrivate *dpriv = drawable->private; dpriv->swap_interval = interval; } static unsigned int driGetSwapInterval(__DRIdrawable *drawable) { __DRIdrawablePrivate *dpriv = drawable->private; 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 void *driCreateNewDrawable(__DRIscreen *screen, const __GLcontextModes *modes, __DRIdrawable *pdraw, drm_drawable_t hwDrawable, int renderType, const int *attrs) { __DRIscreenPrivate *psp; __DRIdrawablePrivate *pdp; pdraw->private = NULL; /* Since pbuffers are not yet supported, no drawable attributes are * supported either. */ (void) attrs; pdp = (__DRIdrawablePrivate *)_mesa_malloc(sizeof(__DRIdrawablePrivate)); if (!pdp) { return NULL; } pdp->hHWDrawable = hwDrawable; 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->vblSeq = 0; pdp->vblFlags = 0; psp = (__DRIscreenPrivate *)screen->private; pdp->driScreenPriv = psp; pdp->driContextPriv = &psp->dummyContextPriv; if (!(*psp->DriverAPI.CreateBuffer)(psp, pdp, modes, renderType == GLX_PIXMAP_BIT)) { _mesa_free(pdp); return NULL; } pdraw->private = pdp; pdraw->destroyDrawable = driDestroyDrawable; pdraw->swapBuffers = driSwapBuffers; /* called by glXSwapBuffers() */ 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; pdp->swapBuffers = psp->DriverAPI.SwapBuffers; if (psp->dri2.enabled) { pdp->dri2.tail = 0; pdp->pBackClipRects = _mesa_malloc(sizeof *pdp->pBackClipRects); } return (void *) pdp; } static void driDestroyDrawable(__DRIdrawable *drawable) { __DRIdrawablePrivate *pdp = drawable->private; __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. * * \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(__DRIcontext *context) { __DRIcontextPrivate *pcp = context->private; if (pcp) { (*pcp->driScreenPriv->DriverAPI.DestroyContext)(pcp); _mesa_free(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 shared 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(__DRIscreen *screen, const __GLcontextModes *modes, int render_type, __DRIcontext *shared, drm_context_t hwContext, __DRIcontext *pctx) { __DRIcontextPrivate *pcp; __DRIcontextPrivate *pshare = (shared != NULL) ? shared->private : NULL; __DRIscreenPrivate *psp; void * const shareCtx = (pshare != NULL) ? pshare->driverPrivate : NULL; psp = (__DRIscreenPrivate *)screen->private; pcp = (__DRIcontextPrivate *)_mesa_malloc(sizeof(__DRIcontextPrivate)); if (!pcp) { return NULL; } pcp->hHWContext = hwContext; 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! */ } pctx->destroyContext = driDestroyContext; pctx->bindContext = driBindContext; pctx->unbindContext = driUnbindContext; if ( !(*psp->DriverAPI.CreateContext)(modes, pcp, shareCtx) ) { _mesa_free(pcp); return NULL; } return pcp; } /*@}*/ static const __DRIextension ** driGetExtensions(__DRIscreen *screen) { __DRIscreenPrivate *psp = screen->private; return psp->extensions; } /*****************************************************************/ /** \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(__DRIscreen *screen) { __DRIscreenPrivate *psp = screen->private; 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) { drmBOUnmap(psp->fd, &psp->dri2.sareaBO); drmBOUnreference(psp->fd, &psp->dri2.sareaBO); } 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(__DRIscreenPrivate *psp, const __DRIextension **extensions) { int i; for (i = 0; extensions[i]; i++) { if (strcmp(extensions[i]->name, __DRI_CONTEXT_MODES) == 0) psp->contextModes = (__DRIcontextModesExtension *) extensions[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_CORE_DRI2) == 0) psp->dri2.core = (__DRIcoreDRI2Extension *) 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. * * \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. * * \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. */ PUBLIC void * __DRI_CREATE_NEW_SCREEN( int scrn, __DRIscreen *psc, const __DRIversion * ddx_version, const __DRIversion * dri_version, const __DRIversion * drm_version, const __DRIframebuffer * frame_buffer, drmAddress pSAREA, int fd, const __DRIextension ** extensions, __GLcontextModes ** driver_modes ) { __DRIscreenPrivate *psp; static const __DRIextension *emptyExtensionList[] = { NULL }; psp = _mesa_malloc(sizeof(*psp)); if (!psp) return NULL; psp->psc = psc; 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; psc->destroyScreen = driDestroyScreen; psc->getExtensions = driGetExtensions; psc->createNewDrawable = driCreateNewDrawable; psc->createNewContext = driCreateNewContext; *driver_modes = __driDriverInitScreen(psp); if (*driver_modes == NULL) { _mesa_free(psp); return NULL; } return psp; } PUBLIC void * __DRI2_CREATE_NEW_SCREEN(int scrn, __DRIscreen *psc, int fd, unsigned int sarea_handle, const __DRIextension **extensions, __GLcontextModes **driver_modes) { __DRIscreenPrivate *psp; static const __DRIextension *emptyExtensionList[] = { NULL }; unsigned int *p; drmVersionPtr version; __GLcontextModes *(*initScreen)(__DRIscreenPrivate *psc); initScreen = dlsym(NULL, "__dri2DriverInitScreen"); if (initScreen == NULL) return NULL; psp = _mesa_malloc(sizeof(*psp)); if (!psp) return NULL; setupLoaderExtensions(psp, extensions); psp->psc = psc; 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; psc->destroyScreen = driDestroyScreen; psc->getExtensions = driGetExtensions; psc->createNewDrawable = driCreateNewDrawable; psc->createNewContext = driCreateNewContext; *driver_modes = initScreen(psp); if (*driver_modes == NULL) { drmBOUnmap(psp->fd, &psp->dri2.sareaBO); drmBOUnreference(psp->fd, &psp->dri2.sareaBO); _mesa_free(psp); return NULL; } return psp; } static int driFrameTracking(__DRIdrawable *drawable, GLboolean enable) { return GLX_BAD_CONTEXT; } static int driQueryFrameTracking(__DRIdrawable *drawable, int64_t * sbc, int64_t * missedFrames, float * lastMissedUsage, float * usage) { __DRIswapInfo sInfo; int status; int64_t ust; __DRIdrawablePrivate * dpriv = drawable->private; __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->pdraw, &n, &d) ) { 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; } /*@}*/