lily/open-type-font-scheme.cc

   1 /*
   2   open-type-font.cc -- implement Open_type_font
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2004--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "modified-font-metric.hh"
  10 #include "open-type-font.hh"
  11
  12 LY_DEFINE (ly_font_sub_fonts, "ly:font-sub-fonts", 1, 0, 0,
  13            (SCM font),
  14            "Given the font metric @var{font} of an OpenType font, return the"
  15            " names of the subfonts within @var{font}.")
  16 {
  17   LY_ASSERT_SMOB (Font_metric, font, 1);
  18   Font_metric *fm = unsmob_metrics (font);
  19   return fm->sub_fonts ();
  20 }
  21
  22 LY_DEFINE (ly_otf_font_glyph_info, "ly:otf-font-glyph-info", 2, 0, 0,
  23            (SCM font, SCM glyph),
  24            "Given the font metric @var{font} of an OpenType font, return the"
  25            " information about named glyph @var{glyph} (a string).")
  26 {
  27   Modified_font_metric *fm
  28     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  29   Open_type_font *otf = dynamic_cast<Open_type_font *> (fm->original_font ());
  30
  31   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OTF font-metric");
  32   LY_ASSERT_TYPE (scm_is_string, glyph, 2);
  33
  34   SCM sym = scm_string_to_symbol (glyph);
  35   return scm_hashq_ref (otf->get_char_table (), sym, SCM_EOL);
  36 }
  37
  38 LY_DEFINE (ly_otf_font_table_data, "ly:otf-font-table-data", 2, 0, 0,
  39            (SCM font, SCM tag),
  40            "Extract a table @var{tag} from @var{font}.  Return empty string"
  41            " for non-existent @var{tag}.")
  42 {
  43   Modified_font_metric *fm
  44     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  45
  46   Open_type_font *otf = fm ? dynamic_cast<Open_type_font *> (fm->original_font ())
  47     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  48
  49   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "Open type font");
  50   LY_ASSERT_TYPE (scm_is_string, tag, 2);
  51
  52   char ctag [5] = "    ";
  53
  54   string tag_string = ly_scm2string (tag);
  55   strncpy (ctag, tag_string.c_str (), tag_string.length ());
  56
  57   string tab = otf->get_otf_table (string (ctag));
  58
  59   return scm_from_locale_stringn ((char const *) tab.data (), tab.length ());
  60 }
  61
  62 LY_DEFINE (ly_otf_font_p, "ly:otf-font?", 1, 0, 0,
  63            (SCM font),
  64            "Is @var{font} an OpenType font?")
  65 {
  66   Modified_font_metric *fm
  67     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  68
  69   Open_type_font *otf = fm ? dynamic_cast<Open_type_font *> (fm->original_font ())
  70     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  71
  72   return scm_from_bool (otf);
  73 }
  74
  75 LY_DEFINE (ly_otf_glyph_list, "ly:otf-glyph-list",
  76            1, 0, 0, (SCM font),
  77            "Return a list of glyph names for @var{font}.")
  78 {
  79   Modified_font_metric *fm
  80     = dynamic_cast<Modified_font_metric *> (unsmob_metrics (font));
  81
  82   Open_type_font *otf = fm ? dynamic_cast<Open_type_font *> (fm->original_font ())
  83     : dynamic_cast<Open_type_font *> (unsmob_metrics (font));
  84
  85
  86   SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OTF font");
  87   return otf->glyph_list ();
  88
  89 }