lily/afm.cc

   1 /*
   2   afm.cc --  implement Adobe_font_metric
   3
   4   source file of the Flower Library
   5
   6   (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include "afm.hh"
  10 #include "warn.hh"
  11
  12 Adobe_font_metric::Adobe_font_metric (AFM_Font_info * fi)
  13 {
  14   font_inf_ = fi;
  15
  16   for (int i= 256; i--;)
  17     ascii_to_metric_idx_.push (-1);
  18
  19   for (int i=0; i < fi->numOfChars; i++)
  20     {
  21       AFM_CharMetricInfo * c = fi->cmi + i;
  22
  23       ascii_to_metric_idx_[c->code] = i;
  24       name_to_metric_dict_[c->name] = i;
  25     }
  26 }
  27
  28
  29 SCM
  30 Adobe_font_metric::make_afm (AFM_Font_info *fi)
  31 {
  32   Adobe_font_metric * fm = new Adobe_font_metric (fi);
  33
  34   return fm->smobbed_self();
  35 }
  36
  37
  38 AFM_CharMetricInfo const *
  39 Adobe_font_metric::find_ascii_metric (int a , bool warn) const
  40 {
  41   if (ascii_to_metric_idx_[a] >=0)
  42     {
  43       int code = ascii_to_metric_idx_[a];
  44       if (code>=0)
  45         {
  46           return font_inf_->cmi + code;
  47         }
  48     }
  49   else if (warn )
  50     {
  51       warning (_f ("can't find character number: %d", a));
  52     }
  53
  54   return 0;
  55 }
  56
  57 AFM_CharMetricInfo const *
  58 Adobe_font_metric::find_char_metric (String nm, bool warn) const
  59 {
  60   map<String,int>::const_iterator ai = name_to_metric_dict_.find (nm);
  61
  62   if (ai == name_to_metric_dict_.end ())
  63     {
  64       if (warn)
  65         {
  66           warning (_f ("can't find character called: `%s'", nm.ch_C()));
  67         }
  68       return 0;
  69     }
  70   else
  71     return font_inf_->cmi + (*ai).second;
  72 }
  73
  74
  75 Box
  76 Adobe_font_metric::get_char (int code, bool warn) const
  77 {
  78   AFM_CharMetricInfo const
  79     * c =  find_ascii_metric (code,warn);
  80   if (c)
  81     return afm_bbox_to_box (c->charBBox);
  82   else
  83     return Box (Interval (0,0),Interval(0,0));
  84 }
  85
  86 SCM
  87 read_afm_file (String nm)
  88 {
  89   FILE *f = fopen (nm.ch_C() , "r");
  90
  91   AFM_Font_info * fi;
  92   int ok = AFM_parseFile (f, &fi, ~1);
  93
  94   if (ok)
  95     {
  96       error (_("Error parsing AFM file"));
  97       exit (2);
  98     }
  99   fclose (f);
 100
 101   return Adobe_font_metric::make_afm (fi);
 102 }
 103
 104
 105 Box
 106 afm_bbox_to_box (AFM_BBox bb)
 107 {
 108   return Box (Interval (bb.llx, bb.urx)* (1/1000.0),
 109               Interval (bb.lly, bb.ury)* (1/1000.0));
 110
 111 }
 112
 113
 114 Adobe_font_metric::~Adobe_font_metric ()
 115 {
 116   AFM_free (font_inf_);
 117 }