[Webkit-unassigned] [Bug 77084] New: [Chrome] Incorrect rendering of anti-aliased strokes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77084

           Summary: [Chrome] Incorrect rendering of anti-aliased strokes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: psenster at google.com
                CC: zimmermann at kde.org


Created an attachment (id=124084)
 --> (https://bugs.webkit.org/attachment.cgi?id=124084&action=review)
Testcae

Steps to reproduce:

1) Open the attached testcase (strokebug.svg) on Chrome/Chromium Linux

Expected results:
There should be a square with a black border with nothing in it.

Actual results:
Artifacts of a path (an 'S' upside down) appear within the square. When increasing the scale by zooming in, the artifacts will disappear.

Builds:
Chrome 17.0.963.38 beta on Linux

Also occurs in: Chromium r118842 on Linux
Works as expected on: All Chrome versions (including Canary) on Mac, Safari 5 on Mac, Firefox 8 on Linux

Additional information:
Strokes seem to be blended with a black background when the stroke is sufficiently small. The bug occurs with any color of fill or stroke, and will disappear when either the stroke-width or the path itself is increased.

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