targetSBC == 0 is a special case, which asks the function
to block until all pending OpenGL bufferswap requests have
completed.
Currently the function just falls through for targetSBC == 0,
returning bogus results.
This breaks applications originally written and tested against
DRI2 which also rely on this not regressing under DRI3/Present,
e.g., Neuro-Science software like Psychtoolbox-3.
This patch fixes the problem.
Cc: "10.3 10.4" <mesa-sta...@lists.freedesktop.org>
Signed-off-by: Mario Kleiner <mario.kleiner...@gmail.com>
---
src/glx/dri3_glx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c
index a9ff73b..b4ac278 100644
--- a/src/glx/dri3_glx.c
+++ b/src/glx/dri3_glx.c
@@ -529,7 +529,8 @@ dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t
target_sbc, int64_t *ust,
{
struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
- while (priv->recv_sbc < target_sbc) {
+ while ((target_sbc != 0 && priv->recv_sbc < target_sbc) ||
+ (target_sbc == 0 && priv->recv_sbc < priv->send_sbc)) {
if (!dri3_wait_for_event(pdraw))
return 0;
}
--
1.9.1
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