[Webkit-unassigned] [Bug 142783] RenderLayerCompositor: only create backing for visible and non-empty layers

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142783

Julien Isorce <j.isorce at samsung.com> changed:

           What    |Removed                     |Added
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 Attachment #248943|0                           |1
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--- Comment #11 from Julien Isorce <j.isorce at samsung.com> ---
Created attachment 249039
  --> https://bugs.webkit.org/attachment.cgi?id=249039&action=review
Example of positionned divs

It'll try to make a proper layout test but for now this example make all the div be composited. You can see it using WEBKIT_DEBUG="compositing".  Whereas z-index=auto should prevent them creating a stacking context (backing).

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