[Webkit-unassigned] [Bug 73161] New: Absolute child is not repainted when parent opacity changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73161

           Summary: Absolute child is not repainted when parent opacity
                    changes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pdr at google.com


Changing the opacity of a parent should trigger a repaint of all children but absolutely positioned children are not repainted correctly. Instead of repainting the entire child, only the parts of the child that are in the parent's bounding box are repainted.

See https://bugs.webkit.org/show_bug.cgi?id=68777 for a repro case.

This was originally fixed in https://bugs.webkit.org/show_bug.cgi?id=68777 but it caused a regression and was rolled back. I will post a new patch shortly which should fix this bug.

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