[Poppler-bugs] [Bug 103956] New: [PATCH] Fix Arthur 'clip' method

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103956

            Bug ID: 103956
           Summary: [PATCH] Fix Arthur 'clip' method
           Product: poppler
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: arthur backend
          Assignee: poppler-bugs at lists.freedesktop.org
          Reporter: oliver.sander at tu-dresden.de

Created attachment 135773
  --> https://bugs.freedesktop.org/attachment.cgi?id=135773&action=edit
Example pdf file

The 'clip' method of ArthurOutputDev sets the current clipping path to the path
given to it in the GfxState variable.  However, the expected behavior is that
the clipping path should be set to the intersection of the previous path with
the new one (cf. the Cairo implementation, which does it that way).

Luckily, fixing this simply means using a different QPainter clipping option. 
A patch is attached.  I also attach a simply example pdf file to trigger the
problem.  When correctly rendered, you should see a part of a red ball.

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