[Webkit-unassigned] [Bug 82336] New: Make it possible to use accelerated compositing for page overlay fading

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=82336

           Summary: Make it possible to use accelerated compositing for
                    page overlay fading
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: lars.knudsen at nokia.com
                CC: kenneth at webkit.org, jocelyn.turcotte at nokia.com,
                    noam.rosenthal at nokia.com


Currently, the page overlay fading is done by redrawing each frame in the fade animation.  This can cause some flickering and uneven fade animation flow, especially on CPU limited hardware. 

We would like a solution that utilizes accelerated compositing for the fade animation, where possible, to offload this task to the GPU, while preserving the original fade mechanism (with redraws), where AC is not available.

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