[Poppler-bugs] [Bug 11165] New: Scribus-produced gradients render with moire patterns in evince

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=11165

           Summary: Scribus-produced gradients render with moire patterns in
                    evince
           Product: poppler
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: njs at pobox.com


This PDF containing a circular gradient, produced using scribus:
  http://www.cogsci.ucsd.edu/~njsmith/poppler-bug/grad.pdf
Looks like this when rendered with evince 0.8.1 (using poppler 0.5.4, all from
debian sid):
  http://www.cogsci.ucsd.edu/~njsmith/poppler-bug/evince-moire.png
I.e., there are horrible aliasing/moire patterns.

When rendered with xpdf (v3.02), the result is beautiful and clean:
  http://www.cogsci.ucsd.edu/~njsmith/poppler-bug/xpdf-clean.png
Spot checks reveal that it also looks perfect in Adobe Reader on Win32 and OSX,
and Preview.app on OSX.

In case it is useful for some reason, I also put up the scribus source file:
  http://www.cogsci.ucsd.edu/~njsmith/poppler-bug/grad.sla

(In real life this arose with the background of a presentation I wanted to give
via PDF.  Unfortunately, the talk is insufficiently psychedelic to live up to
this background.)


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