lily/all-font-metrics-scheme.cc

   1 /*
   2   all-font-metrics-scheme.cc -- implement bindings for
   3   All_font_metrics.
   4
   5   source file of the GNU LilyPond music typesetter
   6
   7   (c) 2007--2009 Han-Wen Nienhuys <hanwen@lilypond.org>
   8
   9 */
  10
  11 #include "all-font-metrics.hh"
  12 #include "main.hh"
  13
  14 LY_DEFINE (ly_reset_all_fonts, "ly:reset-all-fonts", 0, 0, 0,
  15            (),
  16            "Forget all about previously loaded fonts.")
  17 {
  18   delete all_fonts_global;
  19   all_fonts_global = new All_font_metrics (global_path.to_string ());
  20
  21   return SCM_UNSPECIFIED;
  22 }
  23
  24
  25 LY_DEFINE (ly_system_font_load, "ly:system-font-load", 1, 0, 0,
  26            (SCM name),
  27            "Load the OpenType system font @file{@var{name}.otf}."
  28            "  Fonts loaded with this command must contain three"
  29            " additional SFNT font tables called @code{LILC},"
  30            " @code{LILF}, and @code{LILY}, needed for typesetting"
  31            " musical elements.  Currently, only the Emmentaler and"
  32            " the Aybabtu fonts fulfill these requirements.\n"
  33            "\n"
  34            "Note that only @code{ly:font-get-glyph} and derived"
  35            " code (like @code{\\lookup}) can access glyphs from"
  36            " the system fonts; text strings are handled exclusively"
  37            " via the Pango interface.")
  38 {
  39   LY_ASSERT_TYPE (scm_is_string, name, 1);
  40
  41   string name_str = ly_scm2string (name);
  42   Font_metric *fm = all_fonts_global->find_font (name_str);
  43
  44   return fm->self_scm ();
  45 }