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

Mon Mar 7 15:52:19 PST 2011

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

--- Comment #26 from Daniel Sievers <sievers at google.com>  2011-03-07 15:52:19 PST ---
Simon,

without touching canBeComposited() and isSelfPaintingLayer() my proposed change allows for compositing (i)frames that overflow.

Assuming we would want to allow overflowing divs to be composited into their own layers also, what would be the right way to implement it?

I was wondering if you were suggesting that even in order to achieve this goal we should not make such layers self-painting, or were you rather suggesting that it is risky/experimental to start forcing such elements through the self-painting codepaths?

Also, about the testcase: Were you worried that with my change we would create an unwanted stacking context at the 'container' node?

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