lily/modified-font-metric.cc

   1 /*
   2   modified-font-metric.cc -- declare Modified_font_metric
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8 #include <cctype>
   9 using namespace std;
  10
  11 #include "modified-font-metric.hh"
  12 #include "pango-font.hh"
  13 #include "warn.hh"
  14 #include "stencil.hh"
  15 #include "main.hh"
  16 #include "program-option.hh"
  17
  18 Modified_font_metric::Modified_font_metric (Font_metric *fm,
  19                                             Real magnification)
  20 {
  21   magnification_ = magnification;
  22
  23   SCM desc = fm->description_;
  24
  25   Real total_mag = magnification * scm_to_double (scm_cdr (desc));
  26   assert (total_mag);
  27
  28   description_ = scm_cons (scm_car (desc), scm_from_double (total_mag));
  29   orig_ = fm;
  30 }
  31
  32 SCM
  33 Modified_font_metric::make_scaled_font_metric (Font_metric *fm, Real scaling)
  34 {
  35   Modified_font_metric *sfm = new Modified_font_metric (fm, scaling);
  36   return sfm->self_scm ();
  37 }
  38
  39 Real
  40 Modified_font_metric::design_size () const
  41 {
  42   return orig_->design_size ();
  43 }
  44
  45 Box
  46 Modified_font_metric::get_indexed_char (vsize i) const
  47 {
  48   Box b = orig_->get_indexed_char (i);
  49   b.scale (magnification_);
  50   return b;
  51 }
  52
  53 Box
  54 Modified_font_metric::get_ascii_char (vsize i) const
  55 {
  56   Box b = orig_->get_ascii_char (i);
  57   b.scale (magnification_);
  58   return b;
  59 }
  60
  61 vsize
  62 Modified_font_metric::count () const
  63 {
  64   return orig_->count ();
  65 }
  66
  67 Offset
  68 Modified_font_metric::attachment_point (string s) const
  69 {
  70   Offset o = orig_->attachment_point (s);
  71   return o * magnification_;
  72 }
  73
  74 Offset
  75 Modified_font_metric::get_indexed_wxwy (vsize k) const
  76 {
  77   Offset o = orig_->get_indexed_wxwy (k);
  78   return o * magnification_;
  79 }
  80
  81 vsize
  82 Modified_font_metric::name_to_index (string s) const
  83 {
  84   return orig_->name_to_index (s);
  85 }
  86
  87 vsize
  88 Modified_font_metric::index_to_charcode (vsize i) const
  89 {
  90   return orig_->index_to_charcode (i);
  91 }
  92
  93 vsize
  94 Modified_font_metric::index_to_ascii (vsize k) const
  95 {
  96   return orig_->index_to_ascii (k);
  97 }
  98
  99 void
 100 Modified_font_metric::derived_mark () const
 101 {
 102 }
 103
 104 Stencil
 105 Modified_font_metric::text_stencil (string text) const
 106 {
 107   Box b;
 108   if (Pango_font *pf = dynamic_cast<Pango_font *> (orig_))
 109     {
 110       Stencil stc = pf->text_stencil (text);
 111
 112       Box b = stc.extent_box ();
 113
 114       b.scale (magnification_);
 115       Stencil scaled (b, stc.expr ());
 116       return scaled;
 117     }
 118
 119   return Font_metric::text_stencil (text);
 120 }
 121
 122 Box
 123 Modified_font_metric::text_dimension (string text) const
 124 {
 125   Box b;
 126   Interval ydims;
 127   Real w = 0.0;
 128
 129   for (ssize i = 0; i < text.length (); i++)
 130     {
 131       Box b = get_ascii_char ((unsigned char)text[i]);
 132
 133       w += b[X_AXIS].length ();
 134       ydims.unite (b[Y_AXIS]);
 135     }
 136   if (ydims.is_empty ())
 137     ydims = Interval (0, 0);
 138
 139   b = Box (Interval (0, w), ydims);
 140   return b;
 141 }
 142
 143 Font_metric *
 144 Modified_font_metric::original_font () const
 145 {
 146   return orig_;
 147 }
 148
 149 SCM
 150 Modified_font_metric::sub_fonts () const
 151 {
 152   return orig_->sub_fonts ();
 153 }
 154
 155 string
 156 Modified_font_metric::font_name () const
 157 {
 158   return original_font ()->font_name ();
 159 }