lily/open-type-font-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2004--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
  20 #include "modified-font-metric.hh"
  21 #include "open-type-font.hh"
  22
  23 LY_DEFINE (ly_font_sub_fonts, "ly:font-sub-fonts", 1, 0, 0,
  24            (SCM font),
  25            "Given the font metric @var{font} of an OpenType font, return the"
  26            " names of the subfonts within @var{font}.")
  27 {
  28   LY_ASSERT_SMOB (Font_metric, font, 1);
  29
  30   Font_metric *fm = unsmob_metrics (font);
  31   return fm->sub_fonts ();
  32 }
  33
  34 LY_DEFINE (ly_otf_font_glyph_info, "ly:otf-font-glyph-info", 2, 0, 0,
  35            (SCM font, SCM glyph),
  36            "Given the font metric @var{font} of an OpenType font, return the"
  37            " information about named glyph @var{glyph} (a string).")
  38 {
  39   Modified_font_metric *fm
  40     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  41   Open_type_font *otf = fm
  42     ? dynamic_cast<Open_type_font *> (fm->original_font ())
  43     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  44
  45   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OpenType font");
  46   LY_ASSERT_TYPE (scm_is_string, glyph, 2);
  47
  48   SCM sym = scm_string_to_symbol (glyph);
  49   return scm_hashq_ref (otf->get_char_table (), sym, SCM_EOL);
  50 }
  51
  52 LY_DEFINE (ly_otf_font_table_data, "ly:otf-font-table-data", 2, 0, 0,
  53            (SCM font, SCM tag),
  54            "Extract a table @var{tag} from @var{font}.  Return empty string"
  55            " for non-existent @var{tag}.")
  56 {
  57   Modified_font_metric *fm
  58     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  59   Open_type_font *otf = fm
  60     ? dynamic_cast<Open_type_font *> (fm->original_font ())
  61     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  62
  63   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OpenType font");
  64   LY_ASSERT_TYPE (scm_is_string, tag, 2);
  65
  66   char ctag [5] = "    ";
  67
  68   string tag_string = ly_scm2string (tag);
  69   strncpy (ctag, tag_string.c_str (), tag_string.length ());
  70
  71   string tab = otf->get_otf_table (string (ctag));
  72
  73   return scm_from_locale_stringn ((char const *) tab.data (), tab.length ());
  74 }
  75
  76 LY_DEFINE (ly_otf_font_p, "ly:otf-font?", 1, 0, 0,
  77            (SCM font),
  78            "Is @var{font} an OpenType font?")
  79 {
  80   Modified_font_metric *fm
  81     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  82   Open_type_font *otf = fm
  83     ? dynamic_cast<Open_type_font *> (fm->original_font ())
  84     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  85
  86   return scm_from_bool (otf);
  87 }
  88
  89 LY_DEFINE (ly_otf_glyph_count, "ly:otf-glyph-count", 1, 0, 0,
  90            (SCM font),
  91            "Return the number of glyphs in @var{font}.")
  92 {
  93   Modified_font_metric *fm
  94     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  95   Open_type_font *otf = fm
  96     ? dynamic_cast<Open_type_font *> (fm->original_font ())
  97     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  98
  99   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OpenType font");
 100
 101   return scm_from_int ((int) otf->count ());
 102 }
 103
 104 LY_DEFINE (ly_otf_glyph_list, "ly:otf-glyph-list", 1, 0, 0,
 105            (SCM font),
 106            "Return a list of glyph names for @var{font}.")
 107 {
 108   Modified_font_metric *fm
 109     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
 110   Open_type_font *otf = fm
 111     ? dynamic_cast<Open_type_font *> (fm->original_font ())
 112     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
 113
 114   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OpenType font");
 115
 116   return otf->glyph_list ();
 117 }