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"
15 #include "dimensions.hh"
17 static Tex_font_char_metric dummy_static_char_metric;
19 Tex_font_char_metric::Tex_font_char_metric ()
26 italic_correction_ = 0;
30 italic_correction_fix_ = 0;
34 Tex_font_char_metric::dimensions () const
44 Real point_constant = 1 PT;
46 return Box (Interval (0, width_* point_constant ),
47 Interval ((d <? height_) * point_constant,
48 (d >? height_) * point_constant));
51 Tex_font_metric::Tex_font_metric ()
53 encoding_table_ = SCM_EOL;
57 Tex_font_metric::derived_mark () const
59 scm_gc_mark (encoding_table_);
62 Tex_font_char_metric const *
63 Tex_font_metric::find_ascii (int ascii, bool warn) const
65 if (ascii >= 0 && ascii < ascii_to_metric_idx_.size ()
66 && ascii_to_metric_idx_[ascii] >= 0)
67 return & char_metrics_[ascii_to_metric_idx_ [ascii]];
69 warning (_f ("can't find ascii character: %d", ascii));
70 return &dummy_static_char_metric;
73 /* UGH: glyphs need not be consecutive in TFM. */
75 Tex_font_metric::count () const
77 for (int i = ascii_to_metric_idx_.size (); i--;)
78 if (ascii_to_metric_idx_[i] != -1)
84 Tex_font_metric::get_ascii_char (int a) const
86 Box b = find_ascii (a)->dimensions ();
91 Tex_font_metric::make_tfm (String file_name)
93 Tex_font_metric *tfm = new Tex_font_metric;
94 Tex_font_metric_reader reader (file_name);
96 tfm->info_ = reader.info_;
97 tfm->header_ = reader.header_;
98 tfm->char_metrics_ = reader.char_metrics_;
99 tfm->ascii_to_metric_idx_ = reader.ascii_to_metric_idx_;
101 return tfm->self_scm ();
105 Tex_font_metric::design_size () const
107 return info_.design_size * point_constant;
111 Tex_font_metric::name_to_index (String s) const