lily/all-font-metrics.cc

   1 /*
   2   all-font-metrics.cc -- implement All_font_metrics
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "all-font-metrics.hh"
  10
  11 #include "international.hh"
  12 #include "main.hh"
  13 #include "open-type-font.hh"
  14 #include "pango-font.hh"
  15 #include "scm-hash.hh"
  16 #include "warn.hh"
  17
  18
  19 Index_to_charcode_map const *
  20 All_font_metrics::get_index_to_charcode_map (string filename, FT_Face face)
  21 {
  22   if (filename_charcode_maps_map_.find (filename)
  23       == filename_charcode_maps_map_.end ())
  24     filename_charcode_maps_map_[filename] = make_index_to_charcode_map (face);
  25
  26   return &filename_charcode_maps_map_[filename];
  27 }
  28
  29
  30 All_font_metrics::All_font_metrics (string path)
  31 {
  32   otf_dict_ = new Scheme_hash_table;
  33
  34 #if HAVE_PANGO_FT2
  35   PangoFontMap *pfm = pango_ft2_font_map_new ();
  36
  37   pango_ft2_fontmap_
  38     = G_TYPE_CHECK_INSTANCE_CAST (pfm,
  39                                   PANGO_TYPE_FT2_FONT_MAP,
  40                                   PangoFT2FontMap);
  41   pango_dpi_ = 1200;
  42   pango_ft2_font_map_set_resolution (pango_ft2_fontmap_,
  43                                      pango_dpi_, pango_dpi_);
  44
  45   pango_dict_ = new Scheme_hash_table;
  46 #endif
  47
  48   search_path_.parse_path (path);
  49 }
  50
  51 All_font_metrics::~All_font_metrics ()
  52 {
  53   otf_dict_->unprotect ();
  54
  55 #if HAVE_PANGO_FT2
  56   pango_dict_->unprotect ();
  57   g_object_unref (pango_ft2_fontmap_);
  58 #endif
  59 }
  60
  61 All_font_metrics::All_font_metrics (All_font_metrics const &)
  62 {
  63 }
  64
  65 #if HAVE_PANGO_FT2
  66
  67 Pango_font *
  68 All_font_metrics::find_pango_font (PangoFontDescription const *description,
  69                                    Real output_scale
  70                                    )
  71 {
  72   gchar *pango_fn = pango_font_description_to_filename (description);
  73   SCM key = ly_symbol2scm (pango_fn);
  74
  75   SCM val;
  76   if (!pango_dict_->try_retrieve (key, &val))
  77     {
  78       if (be_verbose_global)
  79         progress_indication ("[" + string (pango_fn));
  80
  81       Pango_font *pf = new Pango_font (pango_ft2_fontmap_,
  82                                        description,
  83                                        output_scale
  84                                        );
  85
  86       val = pf->self_scm ();
  87       pango_dict_->set (key, val);
  88       pf->unprotect ();
  89
  90       if (be_verbose_global)
  91         progress_indication ("]");
  92
  93       pf->description_ = scm_cons (SCM_BOOL_F,
  94                                    scm_from_double (1.0));
  95     }
  96   g_free (pango_fn);
  97   return dynamic_cast<Pango_font *> (unsmob_metrics (val));
  98 }
  99
 100 #endif
 101
 102
 103 Open_type_font *
 104 All_font_metrics::find_otf (string name)
 105 {
 106   SCM sname = ly_symbol2scm (name.c_str ());
 107   SCM name_string = ly_string2scm (name);
 108   SCM val;
 109   if (!otf_dict_->try_retrieve (sname, &val))
 110     {
 111       string file_name;
 112
 113       if (file_name.empty ())
 114         file_name = search_path_.find (name + ".otf");
 115       if (file_name.empty ())
 116         return 0;
 117
 118       if (be_verbose_global)
 119         progress_indication ("[" + file_name);
 120
 121       val = Open_type_font::make_otf (file_name);
 122
 123       if (be_verbose_global)
 124         progress_indication ("]");
 125
 126       unsmob_metrics (val)->file_name_ = file_name;
 127       unsmob_metrics (val)->description_ = scm_cons (name_string,
 128                                                      scm_from_double (1.0));
 129       otf_dict_->set (sname, val);
 130       unsmob_metrics (val)->unprotect ();
 131     }
 132
 133   return dynamic_cast<Open_type_font *> (unsmob_metrics (val));
 134 }
 135
 136 Font_metric *
 137 All_font_metrics::find_font (string name)
 138 {
 139   Font_metric *f = find_otf (name);
 140
 141   if (!f)
 142     {
 143       error (_f ("cannot find font: `%s'", name.c_str ()));
 144     }
 145
 146   return f;
 147 }
 148
 149 All_font_metrics *all_fonts_global;