[Bug 225422] Some PDF files cannot be processed and come out blank or with missing fonts

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225422

            Bug ID: 225422
           Summary: Some PDF files cannot be processed and come out blank
                    or with missing fonts
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: gmelis at mikroskosmos.gr

When trying to process a PDF file with CID fonts (not included in the PDF) I
got a blank page with an error of this type:
==========================================================
root at localhost ~/x # gs -sDEVICE=pdfwrite -sOutputFile=x13.pdf 13.pdf
GPL Ghostscript 9.16 (2015-03-30)              
Copyright (C) 2015 Artifex Software, Inc.  All rights reserved.                 
This software comes with NO WARRANTY: see the file PUBLIC for details.          
Processing pages 1 through 1.                  
Page 1                                         
   **** Warning: can't process font stream, loading font by the name.           
Can't find CID font "CIDFont+F1".              
Attempting to substitute CID font /Adobe-Identity for /CIDFont+F1, see
doc/Use.htm#CIDFontSubstitution.                                                
The substitute CID font "Adobe-Identity" is not provided either. attempting to
use fallback CIDFont.See doc/Use.htm#CIDFontSubstitution.                       
Loading a TT font from
/usr/local/share/ghostscript/9.16/Resource/CIDFSubst/DroidSansFallback.ttf to
emulate a CID font Adobe-Id   **** Error reading a content stream. The page may
be incomplete.                                          
   **** File did not complete the page properly and may be damaged.             
entity ... Done.                               
Loading NimbusSan-Reg font from
/usr/local/share/ghostscript/9.16/Resource/Font/NimbusSan-Reg... 8955488
7270221 2744192 1358197 3 done.                                                 
>>showpage, press <return> to continue<<       


   **** This file had errors that were repaired or ignored.                     
   **** The file was produced by:              
   **** >>>> Microsoft: Print To PDF; modified using iText 5.5.11 2000-2017
iText Group NV (AGPL-version) <<<<                                              
   **** Please notify the author of the software that produced this             
   **** file that it does not conform to Adobe's published PDF                  
   **** specification.                         

GS>GPL Ghostscript 9.16: PDFDocEncoding 0 cannot be represented in Unicode      
GPL Ghostscript 9.16: PDFDocEncoding 0 cannot be represented in Unicode
==========================================================

The automatic font substitution did not work and the resulting file came up
blank. I tried the exact same command on a debian system and it came out
perfect, even with ghostscript 9.05, so it's not just a newer version problem.
After enough trial and error I ended up copying the file
"/usr/share/ghostscript/9.22/Resource/Init/pdf_font.ps" from another system
over "/usr/local/share/ghostscript/9.16/Resource/Init/pdf_font.ps", and it
worked as expected. I believe the ghostscript package should either be upgraded
to the 9.22 release, or at least replace the "pdf_font.ps" file with a newer
version.

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