[Webkit-unassigned] [Bug 92811] New: [Chromium] compositing/video-page-visibility.html needs reworking to be deterministic

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=92811

           Summary: [Chromium] compositing/video-page-visibility.html
                    needs reworking to be deterministic
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pkasting at google.com
                CC: jamesr at chromium.org


A description of compositing/video-page-visibility.html from jamesr:

"That test is (effectively) a repaint test.  The way repaint tests work is, on each paint we basically draw a 50% opaque gray rectangle over the whole viewport, then paint the rect(s) that were invalidated since the last paint at 100% alpha.  On this test, we do a bunch of paints with no damage, so you see the first paint at 1/2^N alpha, where N is the number of repaints.

"Unfortunately, on this test I don't think we care at all about N, and I think N isn't entirely stable.  File a new bug to rework the test -- in its current form it isn't telling us anything except that we aren't hitting any ASSERTs (which is somewhat useful)."

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