[Mesa-dev] [PATCH] dri3: Only update number of back buffers in loader_dri3_get_buffers
Michel Dänzer
michel at daenzer.net
Fri Apr 27 15:56:14 UTC 2018
From: Michel Dänzer <michel.daenzer at amd.com>
And only free no longer needed back buffers there as well.
We want to stick to the same back buffer throughout a frame, otherwise
we can run into various issues.
Bugzilla: https://bugs.freedesktop.org/105906
Fixes: 3160cb86aa92 "egl/x11: Re-allocate buffers if format is suboptimal"
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
Sergii, Eero, here's an alternative fix which I think is cleaner, can
you test it?
src/loader/loader_dri3_helper.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/src/loader/loader_dri3_helper.c b/src/loader/loader_dri3_helper.c
index 23729f7ecb2..6db8303d26d 100644
--- a/src/loader/loader_dri3_helper.c
+++ b/src/loader/loader_dri3_helper.c
@@ -420,13 +420,6 @@ dri3_handle_present_event(struct loader_dri3_drawable *draw,
if (buf && buf->pixmap == ie->pixmap)
buf->busy = 0;
-
- if (buf && draw->cur_blit_source != b && !buf->busy &&
- (buf->reallocate ||
- (draw->num_back <= b && b < LOADER_DRI3_MAX_BACK))) {
- dri3_free_render_buffer(draw, buf);
- draw->buffers[b] = NULL;
- }
}
break;
}
@@ -559,7 +552,6 @@ dri3_find_back(struct loader_dri3_drawable *draw)
/* Check whether we need to reuse the current back buffer as new back.
* In that case, wait until it's not busy anymore.
*/
- dri3_update_num_back(draw);
num_to_consider = draw->num_back;
if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1) {
num_to_consider = 1;
@@ -1815,6 +1807,7 @@ loader_dri3_get_buffers(__DRIdrawable *driDrawable,
{
struct loader_dri3_drawable *draw = loaderPrivate;
struct loader_dri3_buffer *front, *back;
+ int buf_id;
buffers->image_mask = 0;
buffers->front = NULL;
@@ -1826,6 +1819,16 @@ loader_dri3_get_buffers(__DRIdrawable *driDrawable,
if (!dri3_update_drawable(driDrawable, draw))
return false;
+ dri3_update_num_back(draw);
+
+ /* Free no longer needed back buffers */
+ for (buf_id = draw->num_back; buf_id < LOADER_DRI3_MAX_BACK; buf_id++) {
+ if (draw->cur_blit_source != buf_id && draw->buffers[buf_id]) {
+ dri3_free_render_buffer(draw, draw->buffers[buf_id]);
+ draw->buffers[buf_id] = NULL;
+ }
+ }
+
/* pixmaps always have front buffers.
* Exchange swaps also mandate fake front buffers.
*/
--
2.17.0
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