lily/modified-font-metric.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include <cctype>
  20 using namespace std;
  21
  22 #include "modified-font-metric.hh"
  23 #include "pango-font.hh"
  24 #include "warn.hh"
  25 #include "stencil.hh"
  26 #include "main.hh"
  27 #include "program-option.hh"
  28
  29 Modified_font_metric::Modified_font_metric (Font_metric *fm,
  30                                             Real magnification)
  31 {
  32   magnification_ = magnification;
  33
  34   SCM desc = fm->description_;
  35
  36   Real total_mag = magnification * scm_to_double (scm_cdr (desc));
  37   assert (total_mag);
  38
  39   description_ = scm_cons (scm_car (desc), scm_from_double (total_mag));
  40   orig_ = fm;
  41 }
  42
  43 SCM
  44 Modified_font_metric::make_scaled_font_metric (Font_metric *fm, Real scaling)
  45 {
  46   Modified_font_metric *sfm = new Modified_font_metric (fm, scaling);
  47   return sfm->self_scm ();
  48 }
  49
  50 Real
  51 Modified_font_metric::design_size () const
  52 {
  53   return orig_->design_size ();
  54 }
  55
  56 Box
  57 Modified_font_metric::get_indexed_char (vsize i) const
  58 {
  59   Box b = orig_->get_indexed_char (i);
  60   b.scale (magnification_);
  61   return b;
  62 }
  63
  64 Box
  65 Modified_font_metric::get_ascii_char (vsize i) const
  66 {
  67   Box b = orig_->get_ascii_char (i);
  68   b.scale (magnification_);
  69   return b;
  70 }
  71
  72 vsize
  73 Modified_font_metric::count () const
  74 {
  75   return orig_->count ();
  76 }
  77
  78 Offset
  79 Modified_font_metric::attachment_point (string s) const
  80 {
  81   Offset o = orig_->attachment_point (s);
  82   return o * magnification_;
  83 }
  84
  85 Offset
  86 Modified_font_metric::get_indexed_wxwy (vsize k) const
  87 {
  88   Offset o = orig_->get_indexed_wxwy (k);
  89   return o * magnification_;
  90 }
  91
  92 vsize
  93 Modified_font_metric::name_to_index (string s) const
  94 {
  95   return orig_->name_to_index (s);
  96 }
  97
  98 vsize
  99 Modified_font_metric::index_to_charcode (vsize i) const
 100 {
 101   return orig_->index_to_charcode (i);
 102 }
 103
 104 vsize
 105 Modified_font_metric::index_to_ascii (vsize k) const
 106 {
 107   return orig_->index_to_ascii (k);
 108 }
 109
 110 void
 111 Modified_font_metric::derived_mark () const
 112 {
 113 }
 114
 115 Stencil
 116 Modified_font_metric::text_stencil (string text, bool feta) const
 117 {
 118   Box b;
 119   if (Pango_font *pf = dynamic_cast<Pango_font *> (orig_))
 120     {
 121       Stencil stc = pf->text_stencil (text, feta);
 122
 123       Box b = stc.extent_box ();
 124
 125       b.scale (magnification_);
 126       Stencil scaled (b, stc.expr ());
 127       return scaled;
 128     }
 129
 130   return Font_metric::text_stencil (text, feta);
 131 }
 132
 133 Box
 134 Modified_font_metric::text_dimension (string text) const
 135 {
 136   Box b;
 137   Interval ydims;
 138   Real w = 0.0;
 139
 140   for (ssize i = 0; i < text.length (); i++)
 141     {
 142       Box b = get_ascii_char ((unsigned char)text[i]);
 143
 144       w += b[X_AXIS].length ();
 145       ydims.unite (b[Y_AXIS]);
 146     }
 147   if (ydims.is_empty ())
 148     ydims = Interval (0, 0);
 149
 150   b = Box (Interval (0, w), ydims);
 151   return b;
 152 }
 153
 154 Font_metric *
 155 Modified_font_metric::original_font () const
 156 {
 157   return orig_;
 158 }
 159
 160 SCM
 161 Modified_font_metric::sub_fonts () const
 162 {
 163   return orig_->sub_fonts ();
 164 }
 165
 166 string
 167 Modified_font_metric::font_name () const
 168 {
 169   return original_font ()->font_name ();
 170 }