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--2003 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 "warn.hh"
  16 #include "warn.hh"
  17 #include "dimensions.hh"
  18
  19 Box
  20 Tex_font_char_metric::dimensions () const
  21 {
  22   if (!exists_b_)
  23     {
  24       Box b;
  25       b.set_empty ();
  26       return b;
  27     }
  28
  29   Real d = -depth_;
  30
  31   Real point_constant = 1 PT;
  32
  33   return Box (Interval (0, width_*point_constant ),
  34               Interval ((d <? height_)*point_constant,
  35                         (d >? height_)*point_constant));
  36 }
  37
  38 Tex_font_char_metric::Tex_font_char_metric ()
  39 {
  40   exists_b_ = false;
  41   code_ = 0;;
  42   width_ = 0;
  43   height_ = 0;
  44   depth_ = 0;
  45   italic_correction_ = 0;
  46   width_fix_ = 0;
  47   height_fix_ = 0;
  48   depth_fix_ = 0;
  49   italic_correction_fix_ = 0;
  50 }
  51
  52 #define APPEND_CHAR_METRIC_ELT(k)  outstr += ::to_string (#k) + " "  + ::to_string (k ## _)  + "; "
  53
  54 String
  55 Tex_font_char_metric::to_string () const
  56 {
  57   String outstr ;
  58
  59   APPEND_CHAR_METRIC_ELT (exists_b);
  60   APPEND_CHAR_METRIC_ELT (code);
  61   APPEND_CHAR_METRIC_ELT (width);
  62   APPEND_CHAR_METRIC_ELT (height);
  63   APPEND_CHAR_METRIC_ELT (depth);
  64   APPEND_CHAR_METRIC_ELT (italic_correction);
  65
  66   return outstr + "\n";
  67 }
  68
  69 Tex_font_metric::Tex_font_metric ()
  70 {
  71 }
  72
  73
  74 static Tex_font_char_metric dummy_static_char_metric;
  75
  76 Tex_font_char_metric const *
  77 Tex_font_metric::find_ascii (int ascii, bool warn) const
  78 {
  79   if (ascii < ascii_to_metric_idx_.size () && ascii_to_metric_idx_[ascii] >= 0)
  80     return & char_metrics_[ascii_to_metric_idx_ [ascii]];
  81   else if (warn)
  82     {
  83       warning (_f ("can't find ascii character: %d", ascii));
  84     }
  85   return &dummy_static_char_metric;
  86 }
  87
  88
  89 /*
  90   UGH: glyphs need not be consecutive in TFM.
  91  */
  92 int
  93 Tex_font_metric::count () const
  94 {
  95   for (int i = ascii_to_metric_idx_.size (); i--;)
  96     {
  97       if (ascii_to_metric_idx_[i] != -1)
  98         return i + 1;
  99     }
 100   return 0;
 101 }
 102
 103 Box
 104 Tex_font_metric::get_char (int a) const
 105 {
 106   Box b = find_ascii (a)->dimensions () ;
 107   return b;
 108 }
 109
 110
 111 String
 112 Tex_font_metric::to_string () const
 113 {
 114   String outstr;
 115   for (int i=0; i < char_metrics_.size (); i++)
 116     outstr += char_metrics_[i].to_string ();
 117
 118   return outstr;
 119 }
 120
 121
 122
 123
 124 SCM
 125 Tex_font_metric::make_tfm (String fn)
 126 {
 127   Tex_font_metric * tfm = new Tex_font_metric;
 128   Tex_font_metric_reader reader (fn);
 129
 130   tfm->info_ = reader.info_;
 131   tfm->header_ = reader.header_;
 132   tfm->char_metrics_ = reader.char_metrics_;
 133   tfm->ascii_to_metric_idx_ = reader.ascii_to_metric_idx_;
 134
 135   return tfm->self_scm ();
 136 }