Bug 92811

Summary: [Chromium] compositing/video-page-visibility.html needs reworking to be deterministic
Product: WebKit Reporter: Peter Kasting <pkasting>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED WONTFIX    
Severity: Normal CC: jamesr, schenney
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   

Description Peter Kasting 2012-07-31 16:37:04 PDT
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)."