[Webkit-unassigned] [Bug 28693] New: grey lines in canvas demo

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=28693

           Summary: grey lines in canvas demo
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eric at webkit.org
                CC: oliver at apple.com


grey lines in canvas demo
http://tulrich.com/geekstuff/canvas/perspective.html

Note that the demo is super slow due to bug 28692.

I'm not sure if these lines are from anti-aliasing or what.  These lines do not
appear in Chroimium Win and Chromium Linux, but they do in Safari Mac and
Chromium Safari.

I'm told these images have a clipping path, and that we're "not supposed to
antialias along the clipping path".  I'm not enough of a graphics expert to
know what proper behavior here is, but our behavior is at least different.

CCing oliver due to his historical interest in this type of bug.

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