diff options
Diffstat (limited to 'src/VBox/Additions/common/crOpenGL/dri_util.c')
| -rw-r--r-- | src/VBox/Additions/common/crOpenGL/dri_util.c | 1117 |
1 files changed, 1117 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/crOpenGL/dri_util.c b/src/VBox/Additions/common/crOpenGL/dri_util.c new file mode 100644 index 00000000..5041e07f --- /dev/null +++ b/src/VBox/Additions/common/crOpenGL/dri_util.c @@ -0,0 +1,1117 @@ +/* $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 <assert.h> +#include <stdarg.h> +#include <unistd.h> +#include <sys/mman.h> +#include <stdio.h> + +#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; + + /* + ** 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. + */ + + psp = pcp->driScreenPriv; + 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 to 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; +} + +/*@}*/ |