[gs-bugs] [Bug 692300] New: Allow cidfmap to have paths to (PostScript) CIDFont files

[bugzilla-daemon at ghostscript.com]

http://bugs.ghostscript.com/show_bug.cgi?id=692300

           Summary: Allow cidfmap to have paths to (PostScript) CIDFont
                    files
           Product: Ghostscript
           Version: master
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P4
         Component: Font API
        AssignedTo: chris.liddell at artifex.com
        ReportedBy: ken.sharp at artifex.com
         QAContact: gs-bugs at ghostscript.com
   Estimated Hours: 0.0


Currently cidfmap allows users to specify a path to font files when we use a
TrueType font for substitution. However, regular CIDFonts are technically only
found if they are in Resource/CIDFont. This is a limitation, especially when
the resources are built into the rom file system, as they are by default. It
would be better if a custom cidfmap could point to disk files which contain
CIDFonts, just as fontmap.GS can.

Note! The limitation above is less severe than it first appears. It transpires
that, when searching for resources (CIDFotns at least) Ghostscript also
searches any paths specified with -I. So if we specify a -I/custom as a
location for our cidfmap, then GS will also look for CIDFonts in
/custom/CIDFont. We believe this is also the case for other resource types.

Since we must use -I to include the custom cidfmap this makes it comparatively
easy to install the CIDFonts. However it does potentially lead to multiple
copies of the font so it would still be better to be able to specify a path for
the font file.

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