lily/easy-notation.cc

   1 /*
   2   easy-notation.cc --  implement easy notation heads
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "note-head.hh"
  10
  11 #include <cctype>
  12 using namespace std;
  13
  14 #include "font-interface.hh"
  15 #include "grob.hh"
  16 #include "music.hh"
  17 #include "output-def.hh"
  18 #include "staff-symbol-referencer.hh"
  19 #include "stem.hh"
  20 #include "stream-event.hh"
  21 #include "text-interface.hh"
  22 #include "rhythmic-head.hh"
  23
  24 /*
  25
  26 TODO: move to scheme
  27
  28 */
  29 MAKE_SCHEME_CALLBACK (Note_head, brew_ez_stencil, 1);
  30 SCM
  31 Note_head::brew_ez_stencil (SCM smob)
  32 {
  33   Grob *me = unsmob_grob (smob);
  34   int log = Rhythmic_head::duration_log (me);
  35
  36   SCM cause = me->get_property ("cause");
  37   SCM spitch = unsmob_stream_event (cause)->get_property ("pitch");
  38   Pitch *pit = unsmob_pitch (spitch);
  39
  40   SCM idx = scm_from_int (pit->get_notename ());
  41   SCM names = me->get_property ("note-names");
  42   SCM charstr = SCM_EOL;
  43   if (scm_is_vector (names))
  44     charstr = scm_vector_ref (names, idx);
  45   else
  46     {
  47       char s[2] = "a";
  48       s[0] = char ((pit->get_notename () + 2) % 7 + 'a');
  49       s[0] = char (toupper (s[0]));
  50       charstr = scm_from_locale_string (s);
  51     }
  52
  53   SCM letter
  54     = Text_interface::interpret_string (me->layout ()->self_scm (),
  55                                         Font_interface::text_font_alist_chain (me),
  56                                         charstr);
  57
  58   Stencil l (*unsmob_stencil (letter));
  59   l.align_to (X_AXIS, CENTER);
  60   l.align_to (Y_AXIS, CENTER);
  61
  62   l = Stencil (Box (), l.expr ());
  63   Real ss = Staff_symbol_referencer::staff_space (me);
  64   Real lt = Staff_symbol_referencer::line_thickness (me);
  65
  66   Real radius = (ss + lt) / 2.0;
  67   Real stem_thick = 1.3 * lt;
  68   if (Grob *stem = unsmob_grob (me->get_object ("stem")))
  69     stem_thick = Stem::thickness (stem);
  70
  71   int black = (log >= 2);
  72
  73   Stencil head;
  74   Box extent (Interval (-radius, radius),
  75               Interval (-radius, radius));
  76
  77   Stencil black_head (extent,
  78                       scm_list_4 (ly_symbol2scm ("circle"),
  79                                   scm_from_double (radius),
  80                                   scm_from_double (0.0),
  81                                   SCM_BOOL_T));
  82   Stencil white_head;
  83   if (black)
  84     l = l.in_color (1, 1, 1);
  85   else
  86     {
  87       white_head = Stencil (extent,
  88                             scm_list_4 (ly_symbol2scm ("circle"),
  89                                         scm_from_double (radius - stem_thick),
  90                                         scm_from_double (0.0),
  91                                         SCM_BOOL_T));
  92
  93       white_head = white_head.in_color (1, 1, 1);
  94     }
  95
  96   Stencil total;
  97   total.add_stencil (l);
  98   total.add_stencil (white_head);
  99   total.add_stencil (black_head);
 100   total.translate_axis (radius, X_AXIS);
 101
 102   return total.smobbed_copy ();
 103 }
 104