[Webkit-unassigned] [Bug 80560] New: webkitLineDashOffset not handled correctly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=80560

           Summary: webkitLineDashOffset not handled correctly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Canvas
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: webkit at ryandesign.com


Created an attachment (id=130748)
 --> (https://bugs.webkit.org/attachment.cgi?id=130748&action=review)
demonstration of problem

webkitLineDashOffset is sometimes not handled correctly -- or at least, is handled differently from Firefox's mozDashOffset, and I like how mozDashOffset is handled better. The attachment demonstrates the problem. Open it in Firefox 10 to see the desired rendering, then open it in WebKit to compare. I am currently using WebKit r110098.

I have only observed the problem when webkitLineDashOffset is negative and its absolute value is greater than the sum of all dash lengths. Uncommenting the commented-out line in the attachment works around the problem by setting webkitLineDashOffset to its modulo.

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