[Webkit-unassigned] [Bug 197595] New: Need to disable layer sharing when a "late" compositing reason trumps overlap

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197595

            Bug ID: 197595
           Summary: Need to disable layer sharing when a "late"
                    compositing reason trumps overlap
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Compositing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

We currently fall into layer sharing when a layer is composited for an "overlap" reason. But after traversing descendants, we may find that we have to composite for overlap, in which case we need to undo the sharing.

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