[Poppler-bugs] [Bug 44412] New: Poppler is ignoring .otf fonts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=44412

             Bug #: 44412
           Summary: Poppler is ignoring .otf fonts
    Classification: Unclassified
           Product: poppler
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: minor
          Priority: medium
         Component: general
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: ahyangyi at gmail.com


Created attachment 55066
  --> https://bugs.freedesktop.org/attachment.cgi?id=55066
A patch that solves this bug

As we know, ttf and otf are essentially the same format with some different
conventions. Therefore, they should be treated alike.

In function [void GfxFont::findExtFontFile] in GfxFont.cc and
[GlobalParams::getDisplayFont], poppler is testing font's extension names.
However, poppler only tested ".ttf", ignoring .otf files.

This will cause pdfs with unembedded fonts being rendered poorly even if
fontconfig is configured properly, as long as the correct options have .otf
format.

To reproduce this problem, remove the URW++ type 1 fonts if you have any. 
Configure fontforge to use Truetype/Opentype fonts like Liberation Fonts or Tex
Gyre Fonts to substitute the standard postscript fonts. Then, make sure the
suffices of these fonts are .otf. Then open a pdf with unembedded fonts, and
the bug should occur.

A simple patch that solves this problem is attached.

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