2 tfm.cc -- implement Tex_font_metric
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2004 Jan Nieuwenhuizen <janneke@gnu.org>
8 some code shamelessly copied from GNU fontutils-0.6/tfm/tfm_input.c
12 #include "tfm-reader.hh"
13 #include "string-convert.hh"
16 #include "dimensions.hh"
18 static Tex_font_char_metric dummy_static_char_metric;
20 Tex_font_char_metric::Tex_font_char_metric ()
27 italic_correction_ = 0;
31 italic_correction_fix_ = 0;
35 Tex_font_char_metric::dimensions () const
46 Real point_constant = 1 PT;
48 return Box (Interval (0, width_*point_constant ),
49 Interval ((d <? height_)*point_constant,
50 (d >? height_)*point_constant));
53 #define APPEND_CHAR_METRIC_ELT(k) \
54 outstr += ::to_string (#k) + " " + ::to_string (k ## _) + "; "
57 Tex_font_char_metric::to_string () const
61 APPEND_CHAR_METRIC_ELT (exists);
62 APPEND_CHAR_METRIC_ELT (code);
63 APPEND_CHAR_METRIC_ELT (width);
64 APPEND_CHAR_METRIC_ELT (height);
65 APPEND_CHAR_METRIC_ELT (depth);
66 APPEND_CHAR_METRIC_ELT (italic_correction);
71 Tex_font_metric::Tex_font_metric ()
75 Tex_font_char_metric const *
76 Tex_font_metric::find_ascii (int ascii, bool warn) const
78 if (ascii >= 0 && ascii < ascii_to_metric_idx_.size ()
79 && ascii_to_metric_idx_[ascii] >= 0)
80 return & char_metrics_[ascii_to_metric_idx_ [ascii]];
82 warning (_f ("can't find ascii character: %d", ascii));
83 return &dummy_static_char_metric;
86 /* UGH: glyphs need not be consecutive in TFM. */
88 Tex_font_metric::count () const
90 for (int i = ascii_to_metric_idx_.size (); i--;)
91 if (ascii_to_metric_idx_[i] != -1)
97 Tex_font_metric::get_ascii_char (int a) const
99 Box b = find_ascii (a)->dimensions ();
104 Tex_font_metric::to_string () const
107 for (int i=0; i < char_metrics_.size (); i++)
108 outstr += char_metrics_[i].to_string ();
113 Tex_font_metric::make_tfm (String filename)
115 Tex_font_metric *tfm = new Tex_font_metric;
116 Tex_font_metric_reader reader (filename);
118 tfm->info_ = reader.info_;
119 tfm->header_ = reader.header_;
120 tfm->char_metrics_ = reader.char_metrics_;
121 tfm->ascii_to_metric_idx_ = reader.ascii_to_metric_idx_;
123 return tfm->self_scm ();
127 Tex_font_metric::design_size () const
129 return info_.design_size;
133 Tex_font_metric::coding_scheme () const
135 return info_.coding_scheme;