[cairo-bugs] [Bug 29250] use XCopyArea for operator SOURCE with compatible COLOR_ALPHA surfaces

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29250

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> 2010-07-26 05:47:56 PDT ---
With my driver author's hat on, this patch should not be necessary. Humph.

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