[Webkit-unassigned] [Bug 88482] [Chromium] Compositor should avoid drawing quads when cached textures are available and contents unchanged

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=88482





--- Comment #28 from zlieber at chromium.org  2012-06-13 16:58:14 PST ---
(From update of attachment 147153)
View in context: https://bugs.webkit.org/attachment.cgi?id=147153&action=review

>>> Source/WebCore/platform/graphics/chromium/cc/CCLayerImpl.cpp:294
>>> +    }
>> 
>> As per offline I'm not sure about this being in CCLayerImpl since it depends on state from calcDrawEtc. But we do have lots of other getters like this, all the drawFoo() ones so maybe my feeling is misplaced.
> 
> I don't really like the potential O(n^2) walk through layers.
> 
> Could calcDraw do the correct surface property changed propagation (or conversion to recursive layer property changed) as it determines what gets a surface and what doesn't? Or, is there some other way to maybe more explicitly propagate these flags?

For this one how about we fall back on propagating it the same way layerPropertyChanged is - every time it is set? Except we have to stop at surface-owning layers for this to be correct.

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