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List: cairo-bugs
Subject: [cairo-bugs] [Bug 54446] New: WebKit regression observed in Cairo commit 83bfd85
From: bugzilla-daemon () freedesktop ! org
Date: 2012-09-03 15:15:30
Message-ID: bug-54446-4039 () http ! bugs ! freedesktop ! org/
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https://bugs.freedesktop.org/show_bug.cgi?id=54446
Bug #: 54446
Summary: WebKit regression observed in Cairo commit 83bfd85
Classification: Unclassified
Product: cairo
Version: 1.12.0
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: general
AssignedTo: cworth@cworth.org
ReportedBy: dominik.rottsches@intel.com
QAContact: cairo-bugs@cairographics.org
Running WebKit EFL r127416 against cairo at git revision 83bfd85 causes a
regression when running the following webkit test which uses clipping, pattern
filling and transformation matrices, push/pop groups:
run-webkit-tests --efl --debug --no-new-test-result --results-directory=lt_c3
LayoutTests/svg/transforms/transformed-text-fill-pattern.html
Running a patched WebKit that generates cairo script output produces the
following cairo script outputs: preRegression.cs, postRegression.cs - note how
the drawn rectangles seem incorrectly be shifted by -8,-8 in the post
regression case.
I am attaching a patch that removes pushing the device transform on the group
surface and adjusting the path. The way I understand the patch 83bfd85, device
transforms should be handled by the backend - is that right?
Using that patch, the WebKit regression does not occur. Could you review
whether the fix proposal makes sense, Chris?
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