lily/all-font-metrics.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1999--2010 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
  20 #include "all-font-metrics.hh"
  21
  22 #include "string-convert.hh"
  23 #include "international.hh"
  24 #include "main.hh"
  25 #include "open-type-font.hh"
  26 #include "pango-font.hh"
  27 #include "scm-hash.hh"
  28 #include "warn.hh"
  29
  30
  31 Index_to_charcode_map const *
  32 All_font_metrics::get_index_to_charcode_map (string filename,
  33                                              int face_index,
  34                                              FT_Face face)
  35 {
  36   string key = filename + String_convert::int_string (face_index);
  37   if (filename_charcode_maps_map_.find (key)
  38       == filename_charcode_maps_map_.end ())
  39     filename_charcode_maps_map_[key] = make_index_to_charcode_map (face);
  40
  41   return &filename_charcode_maps_map_[key];
  42 }
  43
  44
  45 All_font_metrics::All_font_metrics (string path)
  46 {
  47   otf_dict_ = new Scheme_hash_table;
  48
  49 #if HAVE_PANGO_FT2
  50   PangoFontMap *pfm = pango_ft2_font_map_new ();
  51
  52   pango_ft2_fontmap_ = PANGO_FT2_FONT_MAP (pfm);
  53
  54   pango_dpi_ = PANGO_RESOLUTION;
  55   pango_ft2_font_map_set_resolution (pango_ft2_fontmap_,
  56                                      pango_dpi_, pango_dpi_);
  57
  58   pango_dict_ = new Scheme_hash_table;
  59 #endif
  60
  61   search_path_.parse_path (path);
  62 }
  63
  64 All_font_metrics::~All_font_metrics ()
  65 {
  66   otf_dict_->unprotect ();
  67
  68 #if HAVE_PANGO_FT2
  69   pango_dict_->unprotect ();
  70   g_object_unref (pango_ft2_fontmap_);
  71 #endif
  72 }
  73
  74 All_font_metrics::All_font_metrics (All_font_metrics const &)
  75 {
  76 }
  77
  78 #if HAVE_PANGO_FT2
  79
  80 Pango_font *
  81 All_font_metrics::find_pango_font (PangoFontDescription const *description,
  82                                    Real output_scale
  83                                    )
  84 {
  85   gchar *pango_fn = pango_font_description_to_filename (description);
  86   SCM key = ly_symbol2scm (pango_fn);
  87
  88   SCM val;
  89   if (!pango_dict_->try_retrieve (key, &val))
  90     {
  91       if (be_verbose_global)
  92         progress_indication ("\n[" + string (pango_fn));
  93
  94       Pango_font *pf = new Pango_font (pango_ft2_fontmap_,
  95                                        description,
  96                                        output_scale
  97                                        );
  98
  99       val = pf->self_scm ();
 100       pango_dict_->set (key, val);
 101       pf->unprotect ();
 102
 103       if (be_verbose_global)
 104         progress_indication ("]");
 105
 106       pf->description_ = scm_cons (SCM_BOOL_F,
 107                                    scm_from_double (1.0));
 108     }
 109   g_free (pango_fn);
 110   return dynamic_cast<Pango_font *> (unsmob_metrics (val));
 111 }
 112
 113 #endif
 114
 115
 116 Open_type_font *
 117 All_font_metrics::find_otf (string name)
 118 {
 119   SCM sname = ly_symbol2scm (name.c_str ());
 120   SCM val;
 121   if (!otf_dict_->try_retrieve (sname, &val))
 122     {
 123       string file_name;
 124
 125       if (file_name.empty ())
 126         file_name = search_path_.find (name + ".otf");
 127       if (file_name.empty ())
 128         return 0;
 129
 130       if (be_verbose_global)
 131         progress_indication ("\n[" + file_name);
 132
 133       val = Open_type_font::make_otf (file_name);
 134
 135       if (be_verbose_global)
 136         progress_indication ("]");
 137
 138       unsmob_metrics (val)->file_name_ = file_name;
 139       SCM name_string = ly_string2scm (name);
 140       unsmob_metrics (val)->description_ = scm_cons (name_string,
 141                                                      scm_from_double (1.0));
 142       otf_dict_->set (sname, val);
 143       unsmob_metrics (val)->unprotect ();
 144     }
 145
 146   return dynamic_cast<Open_type_font *> (unsmob_metrics (val));
 147 }
 148
 149 Font_metric *
 150 All_font_metrics::find_font (string name)
 151 {
 152   Font_metric *f = find_otf (name);
 153
 154   if (!f)
 155     {
 156       error (_f ("cannot find font: `%s'", name.c_str ()));
 157     }
 158
 159   return f;
 160 }
 161
 162 All_font_metrics *all_fonts_global;