lily/afm.cc

   1 /*
   2   afm2.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 AFM_CharMetricInfo const *
  30 Adobe_font_metric::find_ascii_metric (int a , bool warn) const
  31 {
  32   if (ascii_to_metric_idx_[a] >=0)
  33     {
  34       int code = ascii_to_metric_idx_[a];
  35       if (code>=0)
  36         {
  37           return font_inf_->cmi + code;
  38         }
  39     }
  40   else if (warn )
  41     {
  42       warning (_f ("Can't find character number: %d", a));
  43     }
  44
  45   return 0;
  46 }
  47
  48 AFM_CharMetricInfo const *
  49 Adobe_font_metric::find_char_metric (String nm, bool warn) const
  50 {
  51   if (!name_to_metric_dict_.elem_b (nm))
  52     {
  53       if (warn)
  54         {
  55           warning (_f ("Can't find character called: `%s'", nm.ch_C()));
  56         }
  57       return 0;
  58     }
  59   else
  60     return font_inf_->cmi + name_to_metric_dict_ [nm];
  61 }
  62
  63
  64 Box
  65 Adobe_font_metric::get_char (int code, bool warn) const
  66 {
  67   AFM_CharMetricInfo const
  68     * c =  find_ascii_metric (code,warn);
  69   if (c)
  70     return afm_bbox_to_box (c->charBBox);
  71   else
  72     return Box (Interval (0,0),Interval(0,0));
  73 }
  74
  75 Adobe_font_metric*
  76 read_afm_file (String nm)
  77 {
  78   FILE *f = fopen (nm.ch_C() , "r");
  79
  80   AFM_Font_info * fi;
  81   int ok = AFM_parseFile (f, &fi, ~1);
  82
  83   if (ok)
  84     {
  85       error (_("Error parsing AFM file"));
  86       exit (2);
  87     }
  88   fclose (f);
  89
  90   return new Adobe_font_metric (fi);
  91 }
  92
  93
  94 Box
  95 afm_bbox_to_box (AFM_BBox bb)
  96 {
  97   return Box (Interval (bb.llx, bb.urx)* (1/1000.0),
  98               Interval (bb.lly, bb.ury)* (1/1000.0));
  99
 100 }
 101
 102
 103 Adobe_font_metric::~Adobe_font_metric ()
 104 {
 105   AFM_free (font_inf_);
 106 }