The installed Ghostscript version on CentOS is usually too old if you compare it to installations like Ubuntu. Upgrading ghostscript without compiling the whole package is a challenge, but I found via Chris Schuld’s Blog a link to the http://blackopsoft.com/ repository which provides a recent ghoscript version.
Nevertheless, I still had troubles with ImageMagick. If you want to convert PDFs to images for example, the installed ghostscript version was unable to lookup certain font files resulting in an error similar to this one:
Error: /invalidfont in findfont Operand stack: Arial-ISO Arial-ISO Arial Font Arial Execution stack: [...] Dictionary stack: [...] Current allocation mode is local Last OS error: 2 Current file position is 279 GNU Ghostscript 7.05: Unrecoverable error, exit code 1
I hunted around in the system. Apparently ghostscript still uses a fontmap to lookup fonts. The question is which fontmap was in use. I tried to change the fontmap in /etc/ghostscript which had no affect.
I finally found a bogus fontmap under
which provided all font entries and aliases, but none of the aliases had a font file associated with it. For example, Helvetica-Bold pointed to NimbusSanL-BoldCond, but NimbusSanL-BoldCond had no pointer to an existing font file in the file system. It was simply missing.
I got it now working with this in /usr/share/ghostscript/8.70/Resource/Init:
%! % See Fontmap.GS for the syntax of real Fontmap files. %% Replace 1 (Fontmap.GS) /NimbusSanL-Regu (n019003l.pfb) ; /NimbusSanL-ReguItal (n019023l.pfb) ; /NimbusSanL-Bold (n019004l.pfb) ; /NimbusSanL-BoldItal (n019024l.pfb) ; /NimbusSanL-ReguCond (n019043l.pfb) ; /NimbusSanL-ReguCondItal (n019063l.pfb) ; /NimbusSanL-BoldCond (n019044l.pfb) ; /NimbusSanL-BoldCondItal (n019064l.pfb) ; (Fontmap.GS) .runlibfile