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intel: Ensure renderbuffers are current when mapping them.

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In the case of renering to windows in X, we would render to stale buffers
(or not render at all!) if you hit a MapRenderbuffer as the first thing
done to your window after new buffers are ready to be collected in DRI2.

I think this also covers the weird comment about irb->mt being missing
sometimes.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Eric Anholt 2013-04-19 14:47:28 -07:00
parent 0e8ef74c5f
commit e7c5e9949b
1 changed files with 1 additions and 6 deletions
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7
src/mesa/drivers/dri/intel/intel_fbo.c
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@ -123,12 +123,7 @@ intel_map_renderbuffer(struct gl_context *ctx,
return;
}
/* We sometimes get called with this by our intel_span.c usage. */
if (!irb->mt) {
*out_map = NULL;
*out_stride = 0;
return;
}
intel_prepare_render(intel);
/* For a window-system renderbuffer, we need to flip the mapping we receive
* upside-down. So we need to ask for a rectangle on flipped vertically, and