[Webkit-unassigned] [Bug 70634] Set the opaque flag for GraphicsLayer.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=70634





--- Comment #4 from Adrienne Walker <enne at google.com>  2011-10-21 13:38:41 PST ---
(From update of attachment 112004)
It's possible for multiple layers to go into the same backing, so I think you'll need some sort of bounds check of the layer vs. the bounds of the backing to make sure that a layer with an opaque background color fills the whole space.

I'm not sure how this can be easily tested.  The best I can think of is exposing an isBackingOpaque(RenderObject*) function to windows.internal and then writing a layout test that with a bunch of different cases.

(Also, this is super exciting to see.  You're wanting this for culling, but I also want this sort of information to know whether we can turn on subpixel antialiasing on composited layers.  Although, I guess for that use case the border style checks can be ignored.)

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.