RESOLVED WONTFIX 75142
[chromium] Shadowing of the Canvas' backing doesn't work with BGRA textures 
https://bugs.webkit.org/show_bug.cgi?id=75142
Summary [chromium] Shadowing of the Canvas' backing doesn't work with BGRA textures
Vangelis Kokkevis
Reported 2011-12-22 15:42:19 PST
Canvas2DLayerChromium::updateCompositorResources() calls glCopyTexImage2D to copy from the canvas backing texture to the texture used by the compositor. However, this copy can only work if the canvas backing is an RGBA texture and will fail for BGRA (the BGRA extension doesn't support glCopyTexImage2D). We need an alternative mechanism to do the copy either by explicitly drawing a textured quad onto the bound fbo or using the command buffer extension that twiz@ is working on.
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