[Webkit-unassigned] [Bug 116047] New: Transition on opacity causes too much paint on 3d transformed container

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116047

           Summary: Transition on opacity causes too much paint on 3d
                    transformed container
           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: dieter at komendera.com


Created an attachment (id=201583)
 --> (https://bugs.webkit.org/attachment.cgi?id=201583&action=review)
test case

Mac OS X 10.8.3, Safari 6.0.4, WebKit nightly r150009

To reproduce:
1. Load the attached file
2. Record events in Timeline Web Inspector tab
3. Observe full screen paints

Expected:
Transitions complete without repainting the layer defined by the 'container' element with a 3d transform.

Actual:
Full window is repainted.

Notes:
I had to use the WebKit Web Inspector Timeline, as the Safari Inspector didn't show repaint dimensions.

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