

=head1 NAME

Font::AFM - Interface to Adobe Font Metrics files

=head1 SYNOPSIS

 use Font::AFM;
 $h = new Font::AFM "Helvetica";
 $copyright = $h->Notice;
 $w = $h->Wx->{"aring"};
 $w = $h->stringwidth("Gisle", 10);
 $h->dump;  # for debugging

=head1 DESCRIPTION

This module implements the Font::AFM class. Objects of this class are
initialised from an AFM-file and allows you to obtain information
about the font and the metrics of the various glyphs in the font.

All measurements in AFM files are given in terms of units equal to
1/1000 of the scale factor of the font being used. To compute actual
sizes in a document, these amounts should be multiplied by (scale
factor of font)/1000.

The following methods are available:

=over 3

=item $afm = Font::AFM->new($fontname)

Object constructor. Takes the name of the font as argument. It will
croak if the font can not be found.

=item $afm->latin1_wx_table()

Returns a 256 element array, where each element contains the width
of the corresponding character in the iso-8859-1 character set.

=item $afm->stringwidth($string, [$fontsize])

Returns the width of the string passed as argument. The string is
assumed to be encoded in the iso-8859-1 character set.  A second
argument can be used to scale the width according to the font size.

=item $afm->FontName

The name of the font as presented to the PostScript language
C<findfont> operator, for instance "Times-Roman".

=item $afm->FullName

Unique, human-readable name for an individual font, for instance
"Times Roman".

=item $afm->FamilyName

Human-readable name for a group of fonts that are stylistic variants
of a single design. All fonts that are member of such a group should
have exactly the same C<FamilyName>. Example of a family name is
"Times".

=item $afm->Weight

Human-readable name for the weight, or "boldness", attribute of a font.
Exampes are C<Roman>, C<Bold>, C<Light>.

=item $afm->ItalicAngle

Angle in degrees counterclockwise from the vertical of the dominant
vertical strokes of the font.

=item $afm->IsFixedPitch

If the value is C<true>, it indicated that the font is a fixed-pitch
(monospaced) font.

=item $afm->FontBBox

A string of four numbers giving the lower-left x, lower-left y,
upper-right x, and upper-right y of the font bounding box. The font
bounding box is the smallest rectangle enclosing the shape that would
result if all the characters of the font were placed with their
origins coincident, and then painted.

=item $afm->UnderlinePosition

Recommended distance from the baseline for positioning underline
stokes. This number is the y coordinate of the center of the stroke.

=item $afm->UnderlineThickness

Recommended stroke width for underlining.

=item $afm->Version

Version number of the font.

=item $afm->Notice

Trademark or copyright notice, if applicable.

=item $afm->Comment

Comments found in the AFM file.

=item $afm->EncodingScheme

The name of the standard encoding scheme for the font. Most Adobe
fonts use the C<AdobeStandardEncoding>. Special fonts might state
C<FontSpecific>.

=item $afm->CapHeight

Usually the y-value of the top of the capital H.

=item $afm->XHeight

Typically the y-value of the top of the lowercase x.

=item $afm->Ascender

Typically the y-value of the top of the lowercase d.

=item $afm->Descender

Typically the y-value of the bottom of the lowercase p.

=item $afm->Wx

Returns a hash table that maps from glyph names to the width of that glyph.

=item $afm->BBox

Returns a hash table that maps from glyph names to bounding box information.
The bounding box consist of 4 numbers: llx, lly, urx, ury.

=item $afm->dump

Dumps the content of the Font::AFM object to STDOUT.  Might sometimes
be useful for debugging.

=back
