lily/modified-font-metric.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1999--2011 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_dimensions (vsize i) const
  58 {
  59   Box b = orig_->get_indexed_char_dimensions (i);
  60   b.scale (magnification_);
  61   return b;
  62 }
  63
  64 vsize
  65 Modified_font_metric::count () const
  66 {
  67   return orig_->count ();
  68 }
  69
  70 Offset
  71 Modified_font_metric::attachment_point (string s) const
  72 {
  73   Offset o = orig_->attachment_point (s);
  74   return o * magnification_;
  75 }
  76
  77 Offset
  78 Modified_font_metric::get_indexed_wxwy (vsize k) const
  79 {
  80   Offset o = orig_->get_indexed_wxwy (k);
  81   return o * magnification_;
  82 }
  83
  84 vsize
  85 Modified_font_metric::name_to_index (string s) const
  86 {
  87   return orig_->name_to_index (s);
  88 }
  89
  90 vsize
  91 Modified_font_metric::index_to_charcode (vsize i) const
  92 {
  93   return orig_->index_to_charcode (i);
  94 }
  95
  96 void
  97 Modified_font_metric::derived_mark () const
  98 {
  99 }
 100
 101 Stencil
 102 Modified_font_metric::text_stencil (Output_def *state,
 103                                     string text, bool feta) const
 104 {
 105   Box b;
 106   if (Pango_font *pf = dynamic_cast<Pango_font *> (orig_))
 107     {
 108       Stencil stc = pf->text_stencil (state, text, feta);
 109
 110       Box b = stc.extent_box ();
 111
 112       b.scale (magnification_);
 113       Stencil scaled (b, stc.expr ());
 114       return scaled;
 115     }
 116
 117   return Font_metric::text_stencil (state, text, feta);
 118 }
 119
 120 Font_metric *
 121 Modified_font_metric::original_font () const
 122 {
 123   return orig_;
 124 }
 125
 126 SCM
 127 Modified_font_metric::sub_fonts () const
 128 {
 129   return orig_->sub_fonts ();
 130 }
 131
 132 string
 133 Modified_font_metric::font_name () const
 134 {
 135   return original_font ()->font_name ();
 136 }