[Webkit-unassigned] [Bug 88265] [Chromium] Avoid issuing glClear for opaque render surfaces.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jun 5 09:04:10 PDT 2012


--- Comment #2 from David Reveman <reveman at chromium.org>  2012-06-05 09:04:09 PST ---
(In reply to comment #1)
> Checking if a render surface is opaque is a bit annoying though. You'll need to merge all the opaque rects from its entire subtree. Will this work be < the work to clear?

That's hard to say as the glClear is done by the GPU while figuring out if we have to do the clear is of course not.

I doesn't have to be perfect. Could we just use the opaqueness of the owning layer as a start?

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