lily/breathing-sign.cc

   1 /*
   2   breathing_sign.cc -- implement Breathing_sign
   3
   4   (c) 1999--2007 Michael Krause
   5
   6   written for the GNU LilyPond music typesetter
   7
   8   TODO: --> see breathing-sign-engraver.cc
   9
  10   Extensions for ancient notation (c) 2003--2007 by Juergen Reuter
  11 */
  12
  13 #include "breathing-sign.hh"
  14
  15 #include "staff-symbol-referencer.hh"
  16 #include "directional-element-interface.hh"
  17 #include "output-def.hh"
  18 #include "lookup.hh"
  19 #include "dimensions.hh"
  20 #include "direction.hh"
  21 #include "text-interface.hh"
  22 #include "font-interface.hh"
  23 #include "grob.hh"
  24
  25 /*
  26   TODO: thickness should be a grob property (unit: linethickness)
  27   rather than hardwired to (staff_space / 6).
  28 */
  29
  30 /*
  31   UGH : this is full of C&P code. Consolidate!  --hwn
  32 */
  33
  34 /*
  35   Gregorian chant divisio minima.  (Actually, this was the original
  36   breathing sign by Michael. -- jr)
  37 */
  38 MAKE_SCHEME_CALLBACK (Breathing_sign, divisio_minima, 1);
  39 SCM
  40 Breathing_sign::divisio_minima (SCM smob)
  41 {
  42   Grob *me = unsmob_grob (smob);
  43   Real staff_space = Staff_symbol_referencer::staff_space (me);
  44
  45   Real thickness = Staff_symbol_referencer::line_thickness (me);
  46   thickness *= robust_scm2double (me->get_property ("thickness"), 1.0);
  47
  48   Real blotdiameter = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
  49
  50   /*
  51    * Draw a small vertical line through the uppermost (or, depending
  52    * on direction, lowermost) staff line.
  53    */
  54   Interval xdim (0, thickness);
  55   Interval ydim (-0.5 * staff_space, +0.5 * staff_space);
  56   Box b (xdim, ydim);
  57   Stencil out = Lookup::round_filled_box (b, blotdiameter);
  58   return out.smobbed_copy ();
  59 }
  60
  61 /*
  62   Gregorian chant divisio maior.
  63 */
  64 MAKE_SCHEME_CALLBACK (Breathing_sign, divisio_maior, 1);
  65 SCM
  66 Breathing_sign::divisio_maior (SCM smob)
  67 {
  68   Grob *me = unsmob_grob (smob);
  69   Real staff_space = Staff_symbol_referencer::staff_space (me);
  70   Real staff_size;
  71   Real thickness = Staff_symbol_referencer::line_thickness (me);
  72   thickness *= robust_scm2double (me->get_property ("thickness"), 1.0);
  73
  74   if (Staff_symbol_referencer::get_staff_symbol (me))
  75     staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
  76   else
  77     staff_size = 0.0;
  78
  79   Real blotdiameter = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
  80
  81   /*
  82    * Draw a vertical line that is vertically centered in the staff
  83    * (just like a bar).  The height of this line should be a little
  84    * more than half the size of the staff, such that the endings of
  85    * the line are in the middle of a staff space.
  86    */
  87   int lines = Staff_symbol_referencer::line_count (me);
  88   int height = lines / 2; // little more than half of staff size
  89   if ((lines & 1) != (height & 1))
  90     height++; // ensure endings are centered in staff space
  91
  92   Interval xdim (0, thickness);
  93   Interval ydim (-0.5 * height, +0.5 * height);
  94   Box b (xdim, ydim);
  95   Stencil out = Lookup::round_filled_box (b, blotdiameter);
  96   return out.smobbed_copy ();
  97 }
  98
  99 /*
 100   Gregorian chant divisio maxima.
 101 */
 102 MAKE_SCHEME_CALLBACK (Breathing_sign, divisio_maxima, 1);
 103 SCM
 104 Breathing_sign::divisio_maxima (SCM smob)
 105 {
 106   Grob *me = unsmob_grob (smob);
 107   Real staff_space = Staff_symbol_referencer::staff_space (me);
 108   Real staff_size;
 109   Real thickness = Staff_symbol_referencer::line_thickness (me);
 110   thickness *= robust_scm2double (me->get_property ("thickness"), 1.0);
 111
 112   if (Staff_symbol_referencer::get_staff_symbol (me))
 113     staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
 114   else
 115     staff_size = 0.0;
 116
 117   Real blotdiameter = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
 118
 119   // like a "|" type bar
 120   Interval xdim (0, thickness);
 121   Interval ydim (-0.5 * staff_size, +0.5 * staff_size);
 122   Box b (xdim, ydim);
 123   Stencil out = Lookup::round_filled_box (b, blotdiameter);
 124   return out.smobbed_copy ();
 125 }
 126
 127 /*
 128   Gregorian chant finalis.
 129 */
 130 MAKE_SCHEME_CALLBACK (Breathing_sign, finalis, 1);
 131 SCM
 132 Breathing_sign::finalis (SCM smob)
 133 {
 134   Grob *me = unsmob_grob (smob);
 135   Real staff_space = Staff_symbol_referencer::staff_space (me);
 136   Real staff_size;
 137   Real thickness = Staff_symbol_referencer::line_thickness (me);
 138   thickness *= robust_scm2double (me->get_property ("thickness"), 1.0);
 139
 140   if (Staff_symbol_referencer::get_staff_symbol (me))
 141     staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
 142   else
 143     staff_size = 0.0;
 144
 145   Real blotdiameter = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
 146
 147   // like a "||" type bar
 148   Interval xdim (0, thickness);
 149   Interval ydim (-0.5 * staff_size, +0.5 * staff_size);
 150   Box b (xdim, ydim);
 151   Stencil line1 = Lookup::round_filled_box (b, blotdiameter);
 152   Stencil line2 (line1);
 153   line2.translate_axis (0.5 * staff_space, X_AXIS);
 154   line1.add_stencil (line2);
 155
 156   return line1.smobbed_copy ();
 157 }
 158
 159 MAKE_SCHEME_CALLBACK (Breathing_sign, offset_callback, 1);
 160 SCM
 161 Breathing_sign::offset_callback (SCM smob)
 162 {
 163   Grob *me = unsmob_grob (smob);
 164
 165   Direction d = get_grob_direction (me);
 166   if (!d)
 167     {
 168       d = UP;
 169       set_grob_direction (me, d);
 170     }
 171
 172   Real inter = Staff_symbol_referencer::staff_space (me) / 2;
 173   int sz = Staff_symbol_referencer::line_count (me) - 1;
 174   return scm_from_double (inter * sz * d);
 175 }
 176
 177 ADD_INTERFACE (Breathing_sign,
 178                "A breathing sign.",
 179
 180                /* properties */
 181                "direction "
 182                );