[Webkit-unassigned] [Bug 117296] New: <canvas> contents render on top of overlapping <div> even when they shouldn't

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117296

           Summary: <canvas> contents render on top of overlapping <div>
                    even when they shouldn't
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Canvas
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mibalan at adobe.com
                CC: WebkitBugTracker at adobe.com


Non-positioned elements that overlap (e.g. by using negative margins) should be painted in DOM order - and this happens for "regular" elements. However, <canvas> elements that should render below an overlapping <div> actually render their contents on top of said <div>

See attached files for sample with both 2D and 3D <canvas>es.

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