[Webkit-unassigned] [Bug 55257] Support creating compositing layers for scrollable and overflowing objects

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=55257





--- Comment #24 from Daniel Sievers <sievers at google.com>  2011-03-04 14:30:07 PST ---
(In reply to comment #22)
> Created an attachment (id=84784)
 --> (https://bugs.webkit.org/attachment.cgi?id=84784&action=review) [details]
> Testcase
> 
> Compositing for overflow is very hard, because overflow does not create stacking context. Try the attached test case with your changes.

Thanks for the testcase!

I don't seem to see a problem with this particular case. In Chrome, the results look same with and without my changes. All 3 nodes (container, interleaved, inner) are part of the same (root) stacking context. 

With compositing, we create 3 sibling layers in the expected order (container, interleaved, inner from back to front), with the 'inner' div layer having a clipping layer inserted.

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