[Webkit-unassigned] [Bug 40380] [Qt] When a layer is really opaque (ie has a background color that has 255 alpha) we should fill the layer with that color to tell Qt that the pixemap has no alpha.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=40380





--- Comment #3 from Sam Magnuson <smagnuson at netflix.com>  2010-06-11 13:58:16 PST ---
I agree with you in principal - I can certainly toss out the cache if you'd like. This sort of goes back to our discussion that I get setNeedsDisplay later anyway (just as we do for setContentsToImage, where we don't toss out the cache and we just get a setNeedsDisplay later). 

Do you want me to go ahead and do it for this case, or should I look into that bug as a whole class of bugs later?

As I mentioned to you before I'd like to fix the setNeedsDisplay that we get, since when some things change (like zorder, opacity, etc) we don't need a setNeedsDisplay from WebKit as it causes us to throw away a perfectly valid cached pixmap.

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