[Poppler-bugs] [Bug 36202] New: Poor thin line support in Poppler

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36202

           Summary: Poor thin line support in Poppler
           Product: poppler
           Version: unspecified
          Platform: Other
        OS/Version: Windows (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: splash backend
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: minhhoang at btopenworld.com


Created an attachment (id=45572)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=45572)
3rd party viewer shows how it looks in the viewer I'm using - Notice the some
areas of the text (that are formed by paths) are darker than others

Hi there,

I use a application that uses poppler for it's PDF parsing. However it seems
that since poppler version 0.8.7 (under major release 0.8) any pdfs with thin
lines (those generally under 1.0 line width)appear faint in some areas and
bolder/darker in others. 

This is especially noticeable in bodies of text that have been formed by paths. 

Checking these against Adobe Reader X, I noticed that, that application has a
option for "Enhance thin line" on by default, which seems to artifically
enbold/increase the line widths and weights of any thin lines, so it is more
uniform across the drawing/document. 

The application that uses the popplers library doesn't support this very well
and they tell me it is because its to do with popplers and it's lack of thin
line support. They have tried using the latest available popplers library and
have said that the issue is still not resolved.

I've attached 3 screenshots highlighting the problem.

Has anyone else noticed a problem with their applications using popplers 0.8.7
or above?

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