1AFM(3)                User Contributed Perl Documentation               AFM(3)
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NAME

6       Font::AFM - Interface to Adobe Font Metrics files
7

SYNOPSIS

9        use Font::AFM;
10        $h = new Font::AFM "Helvetica";
11        $copyright = $h->Notice;
12        $w = $h->Wx->{"aring"};
13        $w = $h->stringwidth("Gisle", 10);
14        $h->dump;  # for debugging
15

DESCRIPTION

17       This module implements the Font::AFM class. Objects of this class are
18       initialised from an AFM (Adobe Font Metrics) file and allow you to
19       obtain information about the font and the metrics of the various glyphs
20       in the font.
21
22       All measurements in AFM files are given in terms of units equal to
23       1/1000 of the scale factor of the font being used. To compute actual
24       sizes in a document, these amounts should be multiplied by (scale
25       factor of font)/1000.
26
27       The following methods are available:
28
29       $afm = Font::AFM->new($fontname)
30          Object constructor. Takes the name of the font as argument.  Croaks
31          if the font can not be found.
32
33       $afm->latin1_wx_table()
34          Returns a 256-element array, where each element contains the width
35          of the corresponding character in the iso-8859-1 character set.
36
37       $afm->stringwidth($string, [$fontsize])
38          Returns the width of the argument string. The string is assumed to
39          be encoded in the iso-8859-1 character set.  A second argument can
40          be used to scale the width according to the font size.
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42       $afm->FontName
43          The name of the font as presented to the PostScript language
44          "findfont" operator, for instance "Times-Roman".
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46       $afm->FullName
47          Unique, human-readable name for an individual font, for instance
48          "Times Roman".
49
50       $afm->FamilyName
51          Human-readable name for a group of fonts that are stylistic variants
52          of a single design. All fonts that are members of such a group
53          should have exactly the same "FamilyName". Example of a family name
54          is "Times".
55
56       $afm->Weight
57          Human-readable name for the weight, or "boldness", attribute of a
58          font.  Examples are "Roman", "Bold", "Light".
59
60       $afm->ItalicAngle
61          Angle in degrees counterclockwise from the vertical of the dominant
62          vertical strokes of the font.
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64       $afm->IsFixedPitch
65          If "true", the font is a fixed-pitch (monospaced) font.
66
67       $afm->FontBBox
68          A string of four numbers giving the lower-left x, lower-left y,
69          upper-right x, and upper-right y of the font bounding box. The font
70          bounding box is the smallest rectangle enclosing the shape that
71          would result if all the characters of the font were placed with
72          their origins coincident, and then painted.
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74       $afm->UnderlinePosition
75          Recommended distance from the baseline for positioning underline
76          strokes. This number is the y coordinate of the center of the
77          stroke.
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79       $afm->UnderlineThickness
80          Recommended stroke width for underlining.
81
82       $afm->Version
83          Version number of the font.
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85       $afm->Notice
86          Trademark or copyright notice, if applicable.
87
88       $afm->Comment
89          Comments found in the AFM file.
90
91       $afm->EncodingScheme
92          The name of the standard encoding scheme for the font. Most Adobe
93          fonts use the "AdobeStandardEncoding". Special fonts might state
94          "FontSpecific".
95
96       $afm->CapHeight
97          Usually the y-value of the top of the capital H.
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99       $afm->XHeight
100          Typically the y-value of the top of the lowercase x.
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102       $afm->Ascender
103          Typically the y-value of the top of the lowercase d.
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105       $afm->Descender
106          Typically the y-value of the bottom of the lowercase p.
107
108       $afm->Wx
109          Returns a hash table that maps from glyph names to the width of that
110          glyph.
111
112       $afm->BBox
113          Returns a hash table that maps from glyph names to bounding box
114          information.  The bounding box consist of four numbers: llx, lly,
115          urx, ury.
116
117       $afm->dump
118          Dumps the content of the Font::AFM object to STDOUT.  Might
119          sometimes be useful for debugging.
120
121       The AFM specification can be found at:
122
123          http://partners.adobe.com/asn/developer/pdfs/tn/5004.AFM_Spec.pdf
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ENVIRONMENT

126       METRICS   Contains the path to search for AFM-files.  Format is as for
127                 the PATH environment variable. The default path built into
128                 this library is:
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130                  /usr/lib/afm:/usr/local/lib/afm:/usr/openwin/lib/fonts/afm/:.
131

BUGS

133       Kerning data and composite character data are not yet parsed.  Ligature
134       data is not parsed.
135

137       Copyright 1995-1998 Gisle Aas. All rights reserved.
138
139       This program is free software; you can redistribute it and/or modify it
140       under the same terms as Perl itself.
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144perl v5.36.0                      2022-07-22                            AFM(3)
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