[Poppler-bugs] [Bug 49037] New: Noncompliance with Standard-14 fonts requirement in PDF specs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49037

             Bug #: 49037
           Summary: Noncompliance with Standard-14 fonts requirement in
                    PDF specs
    Classification: Unclassified
           Product: poppler
           Version: unspecified
          Platform: Other
        OS/Version: Windows (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: st.loeffler at gmail.com


Created attachment 60413
  --> https://bugs.freedesktop.org/attachment.cgi?id=60413
Patch for handling of Standard-14 fonts on Windows

According to the PDF specs, every PDF viewer must be able to handle 14 standard
fonts even if they are not embedded.
On Windows, poppler does not supply suitable substitution fonts for Symbol and
ZapfDingbats. "symbol.ttf" could be a fallback, but has a quite different
appearance from the type1 font Symbol and has some missing/different glyphs
(e.g., for the letters 'f', 'j', 'v'). ZapfDingbats is totally different from
"wingding.ttf".

GlobalParams::setupBaseFonts(char * dir) [poppler/GlobalParamsWin.cc] does
support passing a custom directory to it, but it is only called once without
custom directory by GlobalParams::getDisplayFont(GfxFont *font)
[poppler/GlobalParamsWin.cc].

In addition, if one manually changes the directory passed to setupBaseFonts(),
the application crashes because it tries to access a NULL pointer.

Attached is a series of patches with the following changes:
1) Remove "wingding.ttf" as it's not a suitable replacement. For a testcase pdf
file, see http://texworks.googlecode.com/svn/trunk/testcases/base14-fonts.pdf
and the expected output at
http://texworks.googlecode.com/svn/trunk/testcases/base14-fonts.png)
2) Fix the crash when supplying a custom directory to setupBaseFonts() by
checking for valid paths
3) Provide the directory "share/fonts/type1/gsfonts" relative to the
library/application to setupBaseFonts() by default. Ideally, this should
probably be encapsulated into a configuration variable similar to
POPPLER_DATADIR, but I don't know the poppler sources well enough to code that.

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