[Webkit-unassigned] [Bug 57470] New: stroke-linejoin:round fails for 180 degree bends

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=57470

           Summary: stroke-linejoin:round fails for 180 degree bends
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
               URL: http://phrogz.net/SVG/test_linejoin_round.xhtml
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: gavin at phrogz.net
                CC: zimmermann at kde.org


The following SVG element should render as a lozenge/capsule with two rounded ends. Instead, the 180 degree turn causes the right edge to be drawn flat.

<polyline points="0,0 10,0 -10,0" stroke="#000" stroke-linecap="round" stroke-linejoin="round" stroke-width="70" />

Changing one of the y coordinates to non-zero (e.g. 0.1) results in the correct display.

This bug is present in Safari v5.0.4 and the latest nightly Webkit.

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