[Webkit-unassigned] [Bug 152394] New: [Win] Prevent flashing/strobe repaints on certain hardware

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152394

            Bug ID: 152394
           Summary: [Win] Prevent flashing/strobe repaints on certain
                    hardware
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org
                CC: simon.fraser at apple.com

Further testing on a variety of Windows hardware shows that the changes in Bug 151001 seemed to cause a "flashing" repaint to occur on certain web content under Accelerated Compositing on certain Windows configurations.

We eventually tracked this down to my change in WKCACFViewLayerTreeHostcpp, which I changed to be more pessimistic about when repaints were needed. Once this change was reverted, the strobing problem went away.

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