[Webkit-unassigned] [Bug 44127] [chromium] Thumbnails not generated for GPU Rendered Pages

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=44127





--- Comment #38 from Darin Fisher (:fishd, Google) <fishd at chromium.org>  2010-09-01 09:53:34 PST ---
> Without h/w readback we'll be unable to capture the contents of WebGL, 
> accelerated Canvas2D, and 3D CSS-transformed layers. So I don't think software 
> is an option here.

d'oh, of course!


> Not platform independent, but it's small.

Yeah, that's basically what I was hoping for.


> 2) Create an ImageBuffer object (ARGB) of the same size as the rootTextureLayer 
> (this requires us to always allocate another buffer ... potentially wasteful, 
> but avoids checking for mis-match in canvas size)

If the result is less efficient, then it probably isn't worth it.  I was hoping
it would be possible to minimize platform dependent code without any change in
functionality.  If that doesn't look possible, then going with platform specific
code sounds better... just try to break up the function so that it is not so long.


> There seems no obvious way to get the 'size' of a GraphicsContext ... is it 
> assumed to be an infinite (but possibly clipped to some underlying bitmap) 
> drawing plane?

Yes.

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