[Webkit-unassigned] [Bug 49719] Qt should handle unmultiplied RGBA pixel arrays

Thu Nov 18 02:48:23 PST 2010

https://bugs.webkit.org/show_bug.cgi?id=49719

--- Comment #6 from Benjamin Poulain <benjamin.poulain at nokia.com>  2010-11-18 02:48:23 PST ---
(In reply to comment #5)
> I think Qt has this for RGB -> RGB_PM, but not for RGB -> BGR_PM what we need 
> there.

That is why Andreas made those changes. CPU cache is more important than raw CPU power for those kind of basic conversion. By doing it at once instead of in two passes, you gain a lot of performance.

To go further, you could implement this one pass conversion with SIMD, this should ideally be done in QtGui.

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