[Webkit-unassigned] [Bug 85434] New: Winding technique for inset shadow causing flicker.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed May 2 16:43:59 PDT 2012


https://bugs.webkit.org/show_bug.cgi?id=85434

           Summary: Winding technique for inset shadow causing flicker.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Major
          Priority: P2
         Component: Canvas
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: greg at fezo.com


Created an attachment (id=139913)
 --> (https://bugs.webkit.org/attachment.cgi?id=139913&action=review)
Example of flicker caused by winding.

Please review attached file for example. I am using a technique of clockwise followed by anti clockwise to punch a hole in path and then clipping the non overlapping portions of the anti clockwise path to create a inset shadow effect. I suspect its either taking to much time to perform the draw operations or the shader buffer is overflowing.

Expected no flicker. Got flicker.

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