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glx/dri2: Don't call X server for SwapBuffers when there's no back buffer.

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As already done in dri2CopySubBuffer().

Should fix:

https://bugs.freedesktop.org/show_bug.cgi?id=36371
https://bugs.freedesktop.org/show_bug.cgi?id=40533

Might fix:

https://bugs.freedesktop.org/show_bug.cgi?id=32589

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
(cherry picked from commit d8c443ddde)
This commit is contained in:
Michel Dänzer 2011-09-14 18:37:48 +02:00 • committed by Marek Olšák
parent 0502da1ade
commit 942c1b8de1
1 changed files with 4 additions and 0 deletions
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4
src/glx/dri2_glx.c
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@ -539,6 +539,10 @@ dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
(struct dri2_display *)dpyPriv->dri2Display;
CARD64 ret = 0;
/* Check we have the right attachments */
if (!priv->have_back)
return ret;
/* Old servers can't handle swapbuffers */
if (!pdp->swapAvailable) {
dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);