[Webkit-unassigned] [Bug 70634] Mark GraphicsLayers as opaque when possible

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Nov 28 06:41:14 PST 2011


https://bugs.webkit.org/show_bug.cgi?id=70634


Dana Jansens <danakj at chromium.org> changed:

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 Attachment #116550|review?                     |
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--- Comment #70 from Dana Jansens <danakj at chromium.org>  2011-11-28 06:41:13 PST ---
(From update of attachment 116550)
This patch has some bad effects with WebGL Canvas. In particular, when an image contents change, we need to determine its opaque status for the RenderLayer's opaque region. But in order to create an Image* for a generated image, the contents may change causing a loop where there should not be. This causes a synchronization issue in the HTMLCanvasElement/WebGL interaction, since it does not expect to generate an image in its contents changed listeners.

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