1NAME 2 Font::AFM - Interface to Adobe Font Metrics files 3 4SYNOPSIS 5 use Font::AFM; 6 $h = new Font::AFM "Helvetica"; 7 $copyright = $h->Notice; 8 $w = $h->Wx->{"aring"}; 9 $w = $h->stringwidth("Gisle", 10); 10 $h->dump; # for debugging 11 12DESCRIPTION 13 This module implements the Font::AFM class. Objects of this 14 class are initialised from an AFM-file and allows you to obtain 15 information about the font and the metrics of the various glyphs 16 in the font. 17 18 All measurements in AFM files are given in terms of units equal 19 to 1/1000 of the scale factor of the font being used. To compute 20 actual sizes in a document, these amounts should be multiplied 21 by (scale factor of font)/1000. 22 23 The following methods are available: 24 25 $afm = Font::AFM->new($fontname) 26 Object constructor. Takes the name of the font as argument. 27 It will croak if the font can not be found. 28 29 $afm->latin1_wx_table() 30 Returns a 256 element array, where each element contains the 31 width of the corresponding character in the iso-8859-1 32 character set. 33 34 $afm->stringwidth($string, [$fontsize]) 35 Returns the width of the string passed as argument. The 36 string is assumed to be encoded in the iso-8859-1 character 37 set. A second argument can be used to scale the width 38 according to the font size. 39 40 $afm->FontName 41 The name of the font as presented to the PostScript language 42 `findfont' operator, for instance "Times-Roman". 43 44 $afm->FullName 45 Unique, human-readable name for an individual font, for 46 instance "Times Roman". 47 48 $afm->FamilyName 49 Human-readable name for a group of fonts that are stylistic 50 variants of a single design. All fonts that are member of 51 such a group should have exactly the same `FamilyName'. 52 Example of a family name is "Times". 53 54 $afm->Weight 55 Human-readable name for the weight, or "boldness", attribute 56 of a font. Exampes are `Roman', `Bold', `Light'. 57 58 $afm->ItalicAngle 59 Angle in degrees counterclockwise from the vertical of the 60 dominant vertical strokes of the font. 61 62 $afm->IsFixedPitch 63 If the value is `true', it indicated that the font is a 64 fixed-pitch (monospaced) font. 65 66 $afm->FontBBox 67 A string of four numbers giving the lower-left x, lower-left 68 y, upper-right x, and upper-right y of the font bounding box. 69 The font bounding box is the smallest rectangle enclosing the 70 shape that would result if all the characters of the font 71 were placed with their origins coincident, and then painted. 72 73 $afm->UnderlinePosition 74 Recommended distance from the baseline for positioning 75 underline stokes. This number is the y coordinate of the 76 center of the stroke. 77 78 $afm->UnderlineThickness 79 Recommended stroke width for underlining. 80 81 $afm->Version 82 Version number of the font. 83 84 $afm->Notice 85 Trademark or copyright notice, if applicable. 86 87 $afm->Comment 88 Comments found in the AFM file. 89 90 $afm->EncodingScheme 91 The name of the standard encoding scheme for the font. Most 92 Adobe fonts use the `AdobeStandardEncoding'. Special fonts 93 might state `FontSpecific'. 94 95 $afm->CapHeight 96 Usually the y-value of the top of the capital H. 97 98 $afm->XHeight 99 Typically the y-value of the top of the lowercase x. 100 101 $afm->Ascender 102 Typically the y-value of the top of the lowercase d. 103 104 $afm->Descender 105 Typically the y-value of the bottom of the lowercase p. 106 107 $afm->Wx 108 Returns a hash table that maps from glyph names to the width 109 of that glyph. 110 111 $afm->BBox 112 Returns a hash table that maps from glyph names to bounding 113 box information. The bounding box consist of 4 numbers: llx, 114 lly, urx, ury. 115 116 $afm->dump 117 Dumps the content of the Font::AFM object to STDOUT. Might 118 sometimes be useful for debugging. 119 120 The AFM specification can be found at: 121 122 ftp://ftp.adobe.com/pub/adobe/DeveloperSupport/TechNotes/PSfiles/5004.AFM_Spec.ps 123 124ENVIRONMENT 125 METRICS Contains the path to seach for AFM-files. Format is as for 126 the PATH environment variable. The default path built 127 into this library is: 128 129 /usr/lib/afm:/usr/local/lib/afm:/usr/openwin/lib/fonts/afm/:. 130 131BUGS 132 Kerning data and composite character data is not yet parsed. 133 Ligature data is not parsed. 134 135COPYRIGHT 136 Copyright 1995-1998 Gisle Aas. All rights reserved. 137 138 This program is free software; you can redistribute it and/or 139 modify it under the same terms as Perl itself. 140 141