-
-}
-
-int
-__driParseEvents(__DRIcontextPrivate *pcp, __DRIdrawablePrivate *pdp)
-{
- __DRIscreenPrivate *psp = pcp->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 (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 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->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;