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.\" ========================================================================
.\"
.IX Title "PostScript::File::Metrics::Loader 3pm"
.TH PostScript::File::Metrics::Loader 3pm "2012-02-11" "perl v5.14.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
PostScript::File::Metrics::Loader \- Load metrics for PostScript fonts using Font::AFM
.SH "VERSION"
.IX Header "VERSION"
This document describes version 2.20 of
PostScript::File::Metrics::Loader, released February 11, 2012
as part of PostScript-File version 2.20.
.SH "DESCRIPTION"
.IX Header "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 \s-1AFM\s0 file and extract metrics from it.
.PP
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.
.PP
If you need metrics for additional fonts, you may want to modify and
run \fIexamples/generate_metrics.pl\fR to create pre-compiled modules for
them.
.SH "SUBROUTINES"
.IX Header "SUBROUTINES"
.SS "get_encoding_vector"
.IX Subsection "get_encoding_vector"
.Vb 1
\&  PostScript::File::Metrics::Loader::get_encoding_vector($encoding)
.Ve
.PP
This returns the encoding vector for \f(CW$encoding\fR, an arrayref of 256
glyph names.
.SS "load"
.IX Subsection "load"
.Vb 1
\&  PostScript::File::Metrics::Loader::load($font, \e@encodings)
.Ve
.PP
This uses Font::AFM to read the metrics for \f(CW$font\fR, and creates
width tables for each of the \f(CW@encodings\fR.  The metrics are stored
into the hashes used internally by PostScript::File::Metrics.
.SH "DIAGNOSTICS"
.IX Header "DIAGNOSTICS"
.ie n .IP """Can\*(Aqt find definition for %s""" 4
.el .IP "\f(CWCan\*(Aqt find definition for %s\fR" 4
.IX Item "Cant find definition for %s"
If this happens, it indicates you found a bug in
PostScript::File::Metrics::Loader.  Please report it as described
under \*(L"\s-1AUTHOR\s0\*(R".
.ie n .IP """Can\*(Aqt find the AFM file for %s""" 4
.el .IP "\f(CWCan\*(Aqt find the AFM file for %s\fR" 4
.IX Item "Cant find the AFM file for %s"
Font::AFM could not find \fI\f(CI%s\fI.afm\fR in any of the directories it
searched.  See \*(L"\s-1CONFIGURATION\s0 \s-1AND\s0 \s-1ENVIRONMENT\s0\*(R".
.ie n .IP """Invalid term %s in %s""" 4
.el .IP "\f(CWInvalid term %s in %s\fR" 4
.IX Item "Invalid term %s in %s"
This also indicates a bug in PostScript::File.  Please report it.
.ie n .IP """Unknown encoding %s""" 4
.el .IP "\f(CWUnknown encoding %s\fR" 4
.IX Item "Unknown encoding %s"
You asked for an encoding that PostScript::File::Metrics doesn't know about.
.SH "CONFIGURATION AND ENVIRONMENT"
.IX Header "CONFIGURATION AND ENVIRONMENT"
PostScript::File::Metrics::Loader requires no configuration files or
environment variables.
.PP
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
\&\fIFontName.afm\fR in one of the directories it searches.
.PP
I wound up creating symlinks in \fI/usr/local/lib/afm/\fR (which is one
of the default paths that Font::AFM searches if you don't have a
\&\f(CW\*(C`METRICS\*(C'\fR environment variable):
.PP
.Vb 10
\& 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
.Ve
.PP
Paths on your system may vary.  I suggest searching for \f(CW\*(C`.afm\*(C'\fR files,
and then grepping them for \*(L"FontName X\*(R", where X is the font you need
metrics for.
.SH "INCOMPATIBILITIES"
.IX Header "INCOMPATIBILITIES"
None reported.
.SH "BUGS AND LIMITATIONS"
.IX Header "BUGS AND LIMITATIONS"
No bugs have been reported.
.SH "AUTHOR"
.IX Header "AUTHOR"
Christopher J. Madsen  \f(CW\*(C`<perl\ AT\ cjmweb.net>\*(C'\fR
.PP
Please report any bugs or feature requests
to \f(CW\*(C`<bug\-PostScript\-File\ AT\ rt.cpan.org>\*(C'\fR
or through the web interface at
http://rt.cpan.org/Public/Bug/Report.html?Queue=PostScript\-File <http://rt.cpan.org/Public/Bug/Report.html?Queue=PostScript-File>.
.PP
You can follow or contribute to PostScript-File's development at
http://github.com/madsen/postscript\-file <http://github.com/madsen/postscript-file>.
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2012 by Christopher J. Madsen.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
.SH "DISCLAIMER OF WARRANTY"
.IX Header "DISCLAIMER OF WARRANTY"
\&\s-1BECAUSE\s0 \s-1THIS\s0 \s-1SOFTWARE\s0 \s-1IS\s0 \s-1LICENSED\s0 \s-1FREE\s0 \s-1OF\s0 \s-1CHARGE\s0, \s-1THERE\s0 \s-1IS\s0 \s-1NO\s0 \s-1WARRANTY\s0
\&\s-1FOR\s0 \s-1THE\s0 \s-1SOFTWARE\s0, \s-1TO\s0 \s-1THE\s0 \s-1EXTENT\s0 \s-1PERMITTED\s0 \s-1BY\s0 \s-1APPLICABLE\s0 \s-1LAW\s0. \s-1EXCEPT\s0 \s-1WHEN\s0
\&\s-1OTHERWISE\s0 \s-1STATED\s0 \s-1IN\s0 \s-1WRITING\s0 \s-1THE\s0 \s-1COPYRIGHT\s0 \s-1HOLDERS\s0 \s-1AND/OR\s0 \s-1OTHER\s0 \s-1PARTIES\s0
\&\s-1PROVIDE\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \*(L"\s-1AS\s0 \s-1IS\s0\*(R" \s-1WITHOUT\s0 \s-1WARRANTY\s0 \s-1OF\s0 \s-1ANY\s0 \s-1KIND\s0, \s-1EITHER\s0
\&\s-1EXPRESSED\s0 \s-1OR\s0 \s-1IMPLIED\s0, \s-1INCLUDING\s0, \s-1BUT\s0 \s-1NOT\s0 \s-1LIMITED\s0 \s-1TO\s0, \s-1THE\s0 \s-1IMPLIED\s0
\&\s-1WARRANTIES\s0 \s-1OF\s0 \s-1MERCHANTABILITY\s0 \s-1AND\s0 \s-1FITNESS\s0 \s-1FOR\s0 A \s-1PARTICULAR\s0 \s-1PURPOSE\s0. \s-1THE\s0
\&\s-1ENTIRE\s0 \s-1RISK\s0 \s-1AS\s0 \s-1TO\s0 \s-1THE\s0 \s-1QUALITY\s0 \s-1AND\s0 \s-1PERFORMANCE\s0 \s-1OF\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1IS\s0 \s-1WITH\s0
\&\s-1YOU\s0. \s-1SHOULD\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1PROVE\s0 \s-1DEFECTIVE\s0, \s-1YOU\s0 \s-1ASSUME\s0 \s-1THE\s0 \s-1COST\s0 \s-1OF\s0 \s-1ALL\s0
\&\s-1NECESSARY\s0 \s-1SERVICING\s0, \s-1REPAIR\s0, \s-1OR\s0 \s-1CORRECTION\s0.
.PP
\&\s-1IN\s0 \s-1NO\s0 \s-1EVENT\s0 \s-1UNLESS\s0 \s-1REQUIRED\s0 \s-1BY\s0 \s-1APPLICABLE\s0 \s-1LAW\s0 \s-1OR\s0 \s-1AGREED\s0 \s-1TO\s0 \s-1IN\s0 \s-1WRITING\s0
\&\s-1WILL\s0 \s-1ANY\s0 \s-1COPYRIGHT\s0 \s-1HOLDER\s0, \s-1OR\s0 \s-1ANY\s0 \s-1OTHER\s0 \s-1PARTY\s0 \s-1WHO\s0 \s-1MAY\s0 \s-1MODIFY\s0 \s-1AND/OR\s0
\&\s-1REDISTRIBUTE\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1AS\s0 \s-1PERMITTED\s0 \s-1BY\s0 \s-1THE\s0 \s-1ABOVE\s0 \s-1LICENSE\s0, \s-1BE\s0
\&\s-1LIABLE\s0 \s-1TO\s0 \s-1YOU\s0 \s-1FOR\s0 \s-1DAMAGES\s0, \s-1INCLUDING\s0 \s-1ANY\s0 \s-1GENERAL\s0, \s-1SPECIAL\s0, \s-1INCIDENTAL\s0,
\&\s-1OR\s0 \s-1CONSEQUENTIAL\s0 \s-1DAMAGES\s0 \s-1ARISING\s0 \s-1OUT\s0 \s-1OF\s0 \s-1THE\s0 \s-1USE\s0 \s-1OR\s0 \s-1INABILITY\s0 \s-1TO\s0 \s-1USE\s0
\&\s-1THE\s0 \s-1SOFTWARE\s0 (\s-1INCLUDING\s0 \s-1BUT\s0 \s-1NOT\s0 \s-1LIMITED\s0 \s-1TO\s0 \s-1LOSS\s0 \s-1OF\s0 \s-1DATA\s0 \s-1OR\s0 \s-1DATA\s0 \s-1BEING\s0
\&\s-1RENDERED\s0 \s-1INACCURATE\s0 \s-1OR\s0 \s-1LOSSES\s0 \s-1SUSTAINED\s0 \s-1BY\s0 \s-1YOU\s0 \s-1OR\s0 \s-1THIRD\s0 \s-1PARTIES\s0 \s-1OR\s0 A
\&\s-1FAILURE\s0 \s-1OF\s0 \s-1THE\s0 \s-1SOFTWARE\s0 \s-1TO\s0 \s-1OPERATE\s0 \s-1WITH\s0 \s-1ANY\s0 \s-1OTHER\s0 \s-1SOFTWARE\s0), \s-1EVEN\s0 \s-1IF\s0
\&\s-1SUCH\s0 \s-1HOLDER\s0 \s-1OR\s0 \s-1OTHER\s0 \s-1PARTY\s0 \s-1HAS\s0 \s-1BEEN\s0 \s-1ADVISED\s0 \s-1OF\s0 \s-1THE\s0 \s-1POSSIBILITY\s0 \s-1OF\s0
\&\s-1SUCH\s0 \s-1DAMAGES\s0.