_MTX_INITIALIZER_NP, NULL
};
+static void
+dri3_flush_present_events(struct loader_dri3_drawable *draw);
+
+static struct loader_dri3_buffer *
+dri3_find_back_alloc(struct loader_dri3_drawable *draw);
+
/**
* Do we have blit functionality in the image blit extension?
*
draw->have_fake_front = 0;
draw->first_init = true;
+ draw->cur_blit_source = -1;
+ draw->back_format = __DRI_IMAGE_FORMAT_NONE;
+
if (draw->ext->config)
draw->ext->config->configQueryi(draw->dri_screen,
"vblank_mode", &vblank_mode);
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
free(reply);
+ draw->swap_method = __DRI_ATTRIB_SWAP_UNDEFINED;
+ if (draw->ext->core->base.version >= 2) {
+ (void )draw->ext->core->getConfigAttrib(dri_config,
+ __DRI_ATTRIB_SWAP_METHOD,
+ &draw->swap_method);
+ }
+
/*
* Make sure server has the same swap interval we do for the new
* drawable.
int b;
xcb_generic_event_t *ev;
xcb_present_generic_event_t *ge;
+ int num_to_consider = draw->num_back;
+
+ /* Increase the likelyhood of reusing current buffer */
+ dri3_flush_present_events(draw);
+
+ /* Check whether we need to reuse the current back buffer as new back.
+ * In that case, wait until it's not busy anymore.
+ */
+ if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1) {
+ num_to_consider = 1;
+ draw->cur_blit_source = -1;
+ }
for (;;) {
- for (b = 0; b < draw->num_back; b++) {
+ for (b = 0; b < num_to_consider; b++) {
int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->num_back);
struct loader_dri3_buffer *buffer = draw->buffers[id];
flags |= __DRI2_FLUSH_CONTEXT;
loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
- back = dri3_back_buffer(draw);
+ back = dri3_find_back_alloc(draw);
+ if (!back)
+ return;
+
y = draw->height - y - height;
if (draw->is_different_gpu) {
loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, back);
dri3_copy_area(draw->conn,
- dri3_back_buffer(draw)->pixmap,
+ back->pixmap,
draw->drawable,
dri3_drawable_gc(draw),
x, y, x, y, width, height);
if (draw->have_fake_front && !draw->is_different_gpu) {
dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw));
dri3_copy_area(draw->conn,
- dri3_back_buffer(draw)->pixmap,
+ back->pixmap,
dri3_fake_front_buffer(draw)->pixmap,
dri3_drawable_gc(draw),
x, y, x, y, width, height);
draw->vtable->flush_drawable(draw, flush_flags);
- back = draw->buffers[dri3_find_back(draw)];
+ back = dri3_find_back_alloc(draw);
+
if (draw->is_different_gpu && back) {
/* Update the linear buffer before presenting the pixmap */
(void) loader_dri3_blit_image(draw,
back->image,
0, 0, back->width, back->height,
0, 0, __BLIT_FLAG_FLUSH);
- /* Update the fake front */
- if (draw->have_fake_front)
- (void) loader_dri3_blit_image(draw,
- draw->buffers[LOADER_DRI3_FRONT_ID]->image,
- back->image,
- 0, 0, draw->width, draw->height,
- 0, 0, __BLIT_FLAG_FLUSH);
+ }
+
+ /* If we need to preload the new back buffer, remember the source.
+ * The force_copy parameter is used by EGL to attempt to preserve
+ * the back buffer across a call to this function.
+ */
+ if (draw->swap_method != __DRI_ATTRIB_SWAP_UNDEFINED || force_copy)
+ draw->cur_blit_source = LOADER_DRI3_BACK_ID(draw->cur_back);
+
+ /* Exchange the back and fake front. Even though the server knows about these
+ * buffers, it has no notion of back and fake front.
+ */
+ if (back && draw->have_fake_front) {
+ struct loader_dri3_buffer *tmp;
+
+ tmp = dri3_fake_front_buffer(draw);
+ draw->buffers[LOADER_DRI3_FRONT_ID] = back;
+ draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)] = tmp;
+
+ if (draw->swap_method == __DRI_ATTRIB_SWAP_COPY || force_copy)
+ draw->cur_blit_source = LOADER_DRI3_FRONT_ID;
}
dri3_flush_present_events(draw);
*/
if (draw->swap_interval == 0)
options |= XCB_PRESENT_OPTION_ASYNC;
- if (force_copy)
- options |= XCB_PRESENT_OPTION_COPY;
+
+ /* If we need to populate the new back, but need to reuse the back
+ * buffer slot due to lack of local blit capabilities, make sure
+ * the server doesn't flip and we deadlock.
+ */
+ if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1)
+ options |= XCB_PRESENT_OPTION_COPY;
back->busy = 1;
back->last_swap = draw->send_sbc;
remainder, 0, NULL);
ret = (int64_t) draw->send_sbc;
- /* If there's a fake front, then copy the source back buffer
- * to the fake front to keep it up to date. This needs
- * to reset the fence and make future users block until
- * the X server is done copying the bits
+ /* Schedule a server-side back-preserving blit if necessary.
+ * This happens iff all conditions below are satisfied:
+ * a) We have a fake front,
+ * b) We need to preserve the back buffer,
+ * c) We don't have local blit capabilities.
*/
- if (draw->have_fake_front && !draw->is_different_gpu) {
- dri3_fence_reset(draw->conn, draw->buffers[LOADER_DRI3_FRONT_ID]);
- dri3_copy_area(draw->conn,
- back->pixmap,
- draw->buffers[LOADER_DRI3_FRONT_ID]->pixmap,
+ if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1 &&
+ draw->cur_blit_source != LOADER_DRI3_BACK_ID(draw->cur_back)) {
+ struct loader_dri3_buffer *new_back = dri3_back_buffer(draw);
+ struct loader_dri3_buffer *src = draw->buffers[draw->cur_blit_source];
+
+ dri3_fence_reset(draw->conn, new_back);
+ dri3_copy_area(draw->conn, src->pixmap,
+ new_back->pixmap,
dri3_drawable_gc(draw),
- 0, 0, 0, 0,
- draw->width, draw->height);
- dri3_fence_trigger(draw->conn, draw->buffers[LOADER_DRI3_FRONT_ID]);
+ 0, 0, 0, 0, draw->width, draw->height);
+ dri3_fence_trigger(draw->conn, new_back);
+ new_back->last_swap = src->last_swap;
}
+
xcb_flush(draw->conn);
if (draw->stamp)
++(*draw->stamp);
int
loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw)
{
- int back_id = LOADER_DRI3_BACK_ID(dri3_find_back(draw));
+ struct loader_dri3_buffer *back = dri3_find_back_alloc(draw);
- if (back_id < 0 || !draw->buffers[back_id])
+ if (!back || back->last_swap == 0)
return 0;
- if (draw->buffers[back_id]->last_swap != 0)
- return draw->send_sbc - draw->buffers[back_id]->last_swap + 1;
- else
- return 0;
+ return draw->send_sbc - back->last_swap + 1;
}
/** loader_dri3_open
}
}
+/* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
+ * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
+ * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
+ * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
+ */
+static int
+image_format_to_fourcc(int format)
+{
+
+ /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
+ switch (format) {
+ case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
+ case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565;
+ case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888;
+ case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888;
+ case __DRI_IMAGE_FORMAT_ABGR8888: return __DRI_IMAGE_FOURCC_ABGR8888;
+ case __DRI_IMAGE_FORMAT_XBGR8888: return __DRI_IMAGE_FOURCC_XBGR8888;
+ }
+ return 0;
+}
+
/** loader_dri3_alloc_render_buffer
*
* Use the driver createImage function to construct a __DRIimage, then
return true;
}
-/* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
- * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
- * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
- * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
- */
-static int
-image_format_to_fourcc(int format)
-{
-
- /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
- switch (format) {
- case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
- case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565;
- case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888;
- case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888;
- case __DRI_IMAGE_FORMAT_ABGR8888: return __DRI_IMAGE_FOURCC_ABGR8888;
- case __DRI_IMAGE_FORMAT_XBGR8888: return __DRI_IMAGE_FOURCC_XBGR8888;
- }
- return 0;
-}
-
__DRIimage *
loader_dri3_create_image(xcb_connection_t *c,
xcb_dri3_buffer_from_pixmap_reply_t *bp_reply,
buffer->own_pixmap = false;
buffer->width = bp_reply->width;
buffer->height = bp_reply->height;
- buffer->buffer_type = buffer_type;
buffer->shm_fence = shm_fence;
buffer->sync_fence = sync_fence;
int buf_id;
if (buffer_type == loader_dri3_buffer_back) {
+ draw->back_format = format;
+
buf_id = dri3_find_back(draw);
if (buf_id < 0)
break;
}
buffer = new_buffer;
- buffer->buffer_type = buffer_type;
draw->buffers[buf_id] = buffer;
}
dri3_fence_await(draw->conn, buffer);
+ /*
+ * Do we need to preserve the content of a previous buffer?
+ *
+ * Note that this blit is needed only to avoid a wait for a buffer that
+ * is currently in the flip chain or being scanned out from. That's really
+ * a tradeoff. If we're ok with the wait we can reduce the number of back
+ * buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
+ * but in the latter case we must disallow page-flipping.
+ */
+ if (buffer_type == loader_dri3_buffer_back &&
+ draw->cur_blit_source != -1 &&
+ draw->buffers[draw->cur_blit_source] &&
+ buffer != draw->buffers[draw->cur_blit_source]) {
+
+ struct loader_dri3_buffer *source = draw->buffers[draw->cur_blit_source];
+
+ /* Avoid flushing here. Will propably do good for tiling hardware. */
+ (void) loader_dri3_blit_image(draw,
+ buffer->image,
+ source->image,
+ 0, 0, draw->width, draw->height,
+ 0, 0, 0);
+ buffer->last_swap = source->last_swap;
+ draw->cur_blit_source = -1;
+ }
/* Return the requested buffer */
return buffer;
}
if (!dri3_update_drawable(driDrawable, draw))
return false;
- /* pixmaps always have front buffers */
- if (draw->is_pixmap)
+ /* pixmaps always have front buffers.
+ * Exchange swaps also mandate fake front buffers.
+ */
+ if (draw->is_pixmap || draw->swap_method == __DRI_ATTRIB_SWAP_EXCHANGE)
buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
}
mtx_unlock(&blit_context.mtx);
}
+
+/**
+ * Find a backbuffer slot - potentially allocating a back buffer
+ *
+ * \param draw[in,out] Pointer to the drawable for which to find back.
+ * \return Pointer to a new back buffer or NULL if allocation failed or was
+ * not mandated.
+ *
+ * Find a potentially new back buffer, and if it's not been allocated yet and
+ * in addition needs initializing, then try to allocate and initialize it.
+ */
+static struct loader_dri3_buffer *
+dri3_find_back_alloc(struct loader_dri3_drawable *draw)
+{
+ struct loader_dri3_buffer *back;
+ int id;
+
+ id = dri3_find_back(draw);
+ back = (id >= 0) ? draw->buffers[id] : NULL;
+
+ if (back || (id >= 0 && draw->back_format != __DRI_IMAGE_FORMAT_NONE)) {
+ if (dri3_update_drawable(draw->dri_drawable, draw)) {
+ (void) dri3_get_buffer(draw->dri_drawable,
+ draw->back_format,
+ loader_dri3_buffer_back,
+ draw);
+ back = (id >= 0) ? draw->buffers[id] : NULL;
+ }
+ }
+
+ return back;
+}
projects / mesa.git / blobdiff