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zink: document end-of-frame hack

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Acked-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Erik Faye-Lund 2019-07-10 16:33:27 +02:00
parent 10439594ec
commit e14c29b9f2
1 changed files with 8 additions and 0 deletions
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8
src/gallium/drivers/zink/zink_context.c
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@ -1133,6 +1133,14 @@ zink_flush(struct pipe_context *pctx,
(struct zink_fence **)pfence,
batch->fence);
/* HACK:
* For some strange reason, we need to finish before presenting, or else
* we start rendering on top of the back-buffer for the next frame. This
* seems like a bug in the DRI-driver to me, because we really should
* be properly protected by fences here, and the back-buffer should
* either be swapped with the front-buffer, or blitted from. But for
* some strange reason, neither of these things happen.
*/
if (flags & PIPE_FLUSH_END_OF_FRAME)
pctx->screen->fence_finish(pctx->screen, pctx,
(struct pipe_fence_handle *)batch->fence,