[Webkit-unassigned] [Bug 87212] New: Cache absolute clip rects on RenderLayer for compositing overlap testing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87212

           Summary: Cache absolute clip rects on RenderLayer for
                    compositing overlap testing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com
                CC: dino at apple.com, jamesr at chromium.org, enne at google.com


Split out of bug 84410: 
http://trac.webkit.org/changeset/91114 added  call to backgroundClipRect() relative to the root layer. This is very expensive to compute on every layer.

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