[cairo-bugs] [Bug 54507] New: WebKit regression found in Cairo commit 51594d9

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54507

             Bug #: 54507
           Summary: WebKit regression found in Cairo commit 51594d9
    Classification: Unclassified
           Product: cairo
           Version: 1.12.2
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: cworth at cworth.org
        ReportedBy: naginenis at gmail.com
         QAContact: cairo-bugs at cairographics.org


Created attachment 66625
  --> https://bugs.freedesktop.org/attachment.cgi?id=66625
Test failure diff

Running latest WebKit GTK/EFL (r127473) against cairo git revision 51594d9
causes a regression when running the following webkit test to ensure correct
behavior of canvas with fillRect using a gradient fillStyle and a shadow.

Test case:
http://trac.webkit.org/export/127473/trunk/LayoutTests/fast/canvas/canvas-fillRect-gradient-shadow.html

I suspect that cairo matrix to pixman transform/offset conversion in
_cairo_matrix_to_pixman_matrix_offset() causes this regression.

The test results with the failure can be seen in the attachments.

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