[Webkit-unassigned] [Bug 60757] [CAIRO] Don't copy the surface before drawing it into the context in ShareableBitmap::paint()

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri May 13 08:38:22 PDT 2011


https://bugs.webkit.org/show_bug.cgi?id=60757


Martin Robinson <mrobinson at webkit.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mrobinson at webkit.org




--- Comment #2 from Martin Robinson <mrobinson at webkit.org>  2011-05-13 08:38:22 PST ---
(In reply to comment #0)
> cairo_image_surface_create_for_data() is already a shallow copy of the image, so we don't need to copy it again.

Notice that in ShareableBitmapCG.cpp (the CG version of this file), the code does a copy of the image. Perhaps that this is just to support self copies though. If that's the case, it would be better to support self-copies by detecting when the target of the context is the same as the ShareableBitmap. Please contect the Apple team to see what the correct behavior is here.

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