[Poppler-bugs] [Bug 82391] New: Artifact in blur rendering with Antialias enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82391

          Priority: medium
            Bug ID: 82391
          Assignee: poppler-bugs at lists.freedesktop.org
           Summary: Artifact in blur rendering with Antialias enabled
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: box0 at gmx.us
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: general
           Product: poppler

Created attachment 104347
  --> https://bugs.freedesktop.org/attachment.cgi?id=104347&action=edit
rendering artifacts with antialias enabled

With Antialias enabled some PDFs show rendering artifacts. Please see the
attached pictures for a comparison (the picture are from okular).

The artifacts go away if the option is disabled (however that means poor
general rendering quality). 

Readers not based on poppler are not affected (e.g. mupdf).

The problem is in the slight darker outline that can be seen at the end of the
blurred region. It should be easy to spot the problem if you open the test pdf
in okular first and then with mupdf

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