lily/tfm.cc

   1 /*
   2   tfm.cc -- implement Tex_font_metric
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2001 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8
   9   some code shamelessly copied from GNU fontutils-0.6/tfm/tfm_input.c
  10  */
  11
  12 #include "tfm.hh"
  13 #include "tfm-reader.hh"
  14 #include "string-convert.hh"
  15 #include "debug.hh"
  16 #include "warn.hh"
  17
  18 Box
  19 Tex_font_char_metric::dimensions () const
  20 {
  21   if (!exists_b_)
  22     {
  23       Box b;
  24       b.set_empty ();
  25       return b;
  26     }
  27
  28   Real d = -depth_;
  29   return Box (Interval (0, width_),Interval (d <? height_, d >? height_));
  30 }
  31
  32 Tex_font_char_metric::Tex_font_char_metric ()
  33 {
  34   exists_b_ = false;
  35   code_ = 0;;
  36   width_ = 0;
  37   height_ = 0;
  38   depth_ = 0;
  39   italic_correction_ = 0;
  40   width_fix_ = 0;
  41   height_fix_ = 0;
  42   depth_fix_ = 0;
  43   italic_correction_fix_ = 0;
  44 }
  45
  46 #define APPEND_CHAR_METRIC_ELT(k)  outstr += to_str (#k) + " "  + to_str (k ## _)  + "; "
  47
  48 String
  49 Tex_font_char_metric::str () const
  50 {
  51   String outstr ;
  52
  53   APPEND_CHAR_METRIC_ELT (exists_b);
  54   APPEND_CHAR_METRIC_ELT (code);
  55   APPEND_CHAR_METRIC_ELT (width);
  56   APPEND_CHAR_METRIC_ELT (height);
  57   APPEND_CHAR_METRIC_ELT (depth);
  58   APPEND_CHAR_METRIC_ELT (italic_correction);
  59
  60   return outstr + "\n";
  61 }
  62
  63 Tex_font_metric::Tex_font_metric ()
  64 {
  65 }
  66
  67
  68 static Tex_font_char_metric dummy_static_char_metric;
  69
  70 Tex_font_char_metric const *
  71 Tex_font_metric::find_ascii (int ascii, bool warn) const
  72 {
  73   if (ascii < ascii_to_metric_idx_.size () && ascii_to_metric_idx_[ascii] >= 0)
  74     return & char_metrics_[ascii_to_metric_idx_ [ascii]];
  75   else if (warn)
  76     {
  77       warning (_f ("can't find ascii character: %d", ascii));
  78     }
  79   return &dummy_static_char_metric;
  80 }
  81
  82
  83 /*
  84   UGH: glyphs need not be consecutive in TFM.
  85  */
  86 int
  87 Tex_font_metric::count () const
  88 {
  89   for (int i = ascii_to_metric_idx_.size (); i--;)
  90     {
  91       if (ascii_to_metric_idx_[i] != -1)
  92         return i + 1;
  93     }
  94   return 0;
  95 }
  96
  97 Box
  98 Tex_font_metric::get_char (int a) const
  99 {
 100   Box b = find_ascii (a)->dimensions () ;
 101   return b;
 102 }
 103
 104
 105 String
 106 Tex_font_metric::str () const
 107 {
 108   String outstr;
 109   for (int i=0; i < char_metrics_.size (); i++)
 110     outstr += char_metrics_[i].str ();
 111
 112   return outstr;
 113 }
 114
 115
 116
 117
 118 SCM
 119 Tex_font_metric::make_tfm (String fn)
 120 {
 121   Tex_font_metric * tfm_p = new Tex_font_metric;
 122   Tex_font_metric_reader reader (fn);
 123
 124   tfm_p->info_ = reader.info_;
 125   tfm_p->header_ = reader.header_;
 126   tfm_p->char_metrics_ = reader.char_metrics_;
 127   tfm_p->ascii_to_metric_idx_ = reader.ascii_to_metric_idx_;
 128
 129   return tfm_p->self_scm ();
 130 }