[Webkit-unassigned] [Bug 62593] Optimization: do a single fillRect when painting the background in RenderBoxModelObject::paintFillLayerExtended

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=62593





--- Comment #16 from Una Sabovic <una.sabovic at palm.com>  2011-06-16 12:32:03 PST ---
>> Do we have test cases to cover all the combinations? 

See Comment #7. Base bg is hard coded and I couldn't change it with html/css. If you know how to do it with html/css pls let me know and I'll provide the test cases. 
I tested the 50% alpha base bg color by hard coding it - see Comment #7 and attached screenshot and test html. 

I have tested many combinations of base & bg colors with alphas adding to less than 1 - just didn't attach all the screenshots. 


>> we could optimize the case of a base color with alpha of 0 and a bg color with a non-zero alpha so we did not have first the clearRect and then the fillRect.

I thought to add this as well. Should I just add another patch to this bug or create a new one?

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