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PostScript-File-2.20
River stage one • 4 direct dependents • 5 total dependents
++
/ PostScript::File::Metrics::Loader

NAME

PostScript::File::Metrics::Loader - Load metrics for PostScript fonts using Font::AFM

VERSION

This document describes version 2.20 of PostScript::File::Metrics::Loader, released February 11, 2012 as part of PostScript-File version 2.20.

DESCRIPTION

PostScript::File::Metrics::Loader is used by PostScript::File::Metrics when no pre-compiled metrics are available for the requested font or encoding. It uses Font::AFM to read the AFM file and extract metrics from it.

You should not normally need to use this module, since pre-compiled metrics for the standard PostScript fonts are included with this distribution. If you request metrics for a non-standard font, PostScript::File::Metrics will load this module automatically.

If you need metrics for additional fonts, you may want to modify and run examples/generate_metrics.pl to create pre-compiled modules for them.

SUBROUTINES

get_encoding_vector

  PostScript::File::Metrics::Loader::get_encoding_vector($encoding)

This returns the encoding vector for $encoding, an arrayref of 256 glyph names.

load

  PostScript::File::Metrics::Loader::load($font, \@encodings)

This uses Font::AFM to read the metrics for $font, and creates width tables for each of the @encodings. The metrics are stored into the hashes used internally by PostScript::File::Metrics.

DIAGNOSTICS

Can't find definition for %s

If this happens, it indicates you found a bug in PostScript::File::Metrics::Loader. Please report it as described under "AUTHOR".

Can't find the AFM file for %s

Font::AFM could not find %s.afm in any of the directories it searched. See "CONFIGURATION AND ENVIRONMENT".

Invalid term %s in %s

This also indicates a bug in PostScript::File. Please report it.

Unknown encoding %s

You asked for an encoding that PostScript::File::Metrics doesn't know about.

CONFIGURATION AND ENVIRONMENT

PostScript::File::Metrics::Loader requires no configuration files or environment variables.

However, it uses Font::AFM, and unfortunately that's difficult to configure properly (which is why I created PostScript::File::Metrics in the first place). Font::AFM expects to find a file named FontName.afm in one of the directories it searches.

I wound up creating symlinks in /usr/local/lib/afm/ (which is one of the default paths that Font::AFM searches if you don't have a METRICS environment variable):

 Courier.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/courier/pcrr8a.afm
 Courier-Bold.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/courier/pcrb8a.afm
 Courier-BoldOblique.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/courier/pcrbo8a.afm
 Courier-Oblique.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/courier/pcrro8a.afm
 Helvetica.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/helvetic/phvr8a.afm
 Helvetica-Bold.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/helvetic/phvb8a.afm
 Helvetica-BoldOblique.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/helvetic/phvbo8a.afm
 Helvetica-Oblique.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/helvetic/phvro8a.afm
 Symbol.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/symbol/psyr.afm
 Times-Bold.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/times/ptmb8a.afm
 Times-BoldItalic.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/times/ptmbi8a.afm
 Times-Italic.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/times/ptmri8a.afm
 Times-Roman.afm
   -> /usr/share/texmf-dist/fonts/afm/adobe/times/ptmr8a.afm

Paths on your system may vary. I suggest searching for .afm files, and then grepping them for "FontName X", where X is the font you need metrics for.

INCOMPATIBILITIES

None reported.

BUGS AND LIMITATIONS

No bugs have been reported.

AUTHOR

Christopher J. Madsen <perl AT cjmweb.net>

Please report any bugs or feature requests to <bug-PostScript-File AT rt.cpan.org> or through the web interface at http://rt.cpan.org/Public/Bug/Report.html?Queue=PostScript-File.

You can follow or contribute to PostScript-File's development at http://github.com/madsen/postscript-file.

COPYRIGHT AND LICENSE

This software is copyright (c) 2012 by Christopher J. Madsen.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENSE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.