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st/mesa: don't flush the front buffer if it's a pbuffer

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This is the best guess I can make here.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
This commit is contained in:
Marek Olšák 2019-04-26 22:51:33 -04:00
parent 35294f2eca
commit 181dcf0792
1 changed files with 13 additions and 3 deletions
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16
src/mesa/state_tracker/st_manager.c
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@ -1130,9 +1130,19 @@ st_manager_flush_frontbuffer(struct st_context *st)
struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
struct st_renderbuffer *strb = NULL;
if (stfb)
strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].
Renderbuffer);
if (!stfb)
return;
/* If the context uses a doublebuffered visual, but the buffer is
* single-buffered, guess that it's a pbuffer, which doesn't need
* flushing.
*/
if (st->ctx->Visual.doubleBufferMode &&
!stfb->Base.Visual.doubleBufferMode)
return;
strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].
Renderbuffer);
/* Do we have a front color buffer and has it been drawn to since last
* frontbuffer flush?