2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2003--2015 Juergen Reuter <reuter@ipd.uka.de>
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.
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.
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/>.
20 #include "vaticana-ligature.hh"
23 #include "font-interface.hh"
24 #include "international.hh"
27 #include "note-head.hh"
28 #include "output-def.hh"
29 #include "staff-symbol-referencer.hh"
33 vaticana_brew_cauda (Grob *me,
39 bool on_staffline = Staff_symbol_referencer::on_line (me, pos);
40 bool above_staff = pos > Staff_symbol_referencer::staff_span (me)[UP];
44 me->programming_error ("flexa cauda: invalid delta_pitch; assuming -1");
50 if (delta_pitch >= -1)
52 else if (delta_pitch >= -2)
59 if (delta_pitch >= -1)
64 else if (delta_pitch >= -2)
66 else if (delta_pitch >= -3)
71 Box cauda_box (Interval (0, thickness), Interval (-length, 0));
72 return Lookup::round_filled_box (cauda_box, blotdiameter);
76 * TODO: move this function to class Lookup?
79 vaticana_brew_flexa (Grob *me,
83 Real staff_space = Staff_symbol_referencer::staff_space (me);
85 Real right_height = 0.6 * staff_space;
88 SCM flexa_height_scm = me->get_property ("flexa-height");
89 if (flexa_height_scm != SCM_EOL)
90 interval = scm_to_int (flexa_height_scm);
93 me->warning ("Vaticana_ligature: "
94 + _ ("flexa-height undefined; assuming 0"));
99 me->warning (_ ("ascending vaticana style flexa"));
101 Real width = robust_scm2double (me->get_property ("flexa-width"), 2);
104 * Compensate curve thickness that appears to be smaller in steep
109 + min (0.12 * abs (interval), 0.3) * staff_space;
112 * Compensate optical illusion regarding vertical position of left
113 * and right endings due to curved shape.
115 Real ypos_correction = -0.1 * staff_space * sign (interval);
116 Real interval_correction = 0.2 * staff_space * sign (interval);
117 Real corrected_interval = interval * staff_space + interval_correction;
120 * middle curve of flexa shape
123 curve.control_[0] = Offset (0.00 * width, 0.0);
124 curve.control_[1] = Offset (0.33 * width, corrected_interval / 2.0);
125 curve.control_[2] = Offset (0.66 * width, corrected_interval / 2.0);
126 curve.control_[3] = Offset (1.00 * width, corrected_interval / 2.0);
128 Bezier top_curve = curve, bottom_curve = curve;
129 for (int i = 0; i < 4; i++)
131 Real curve_thickness = 0.33 * ((3 - i) * left_height + i * right_height);
132 top_curve.control_[i] += Offset (0, 0.5 * curve_thickness);
133 bottom_curve.control_[i] -= Offset (0, 0.5 * curve_thickness);
139 = Lookup::bezier_sandwich (top_curve, bottom_curve, 0.0);
140 stencil.add_stencil (solid_head);
144 Bezier inner_top_curve = top_curve;
145 inner_top_curve.translate (Offset (0.0, -line_thickness));
147 = Lookup::bezier_sandwich (top_curve, inner_top_curve, 0.0);
148 stencil.add_stencil (top_edge);
150 Bezier inner_bottom_curve = bottom_curve;
151 inner_bottom_curve.translate (Offset (0.0, +line_thickness));
153 = Lookup::bezier_sandwich (bottom_curve, inner_bottom_curve, 0.0);
154 stencil.add_stencil (bottom_edge);
157 * TODO: Use horizontal slope with proper slope value rather
158 * than filled box for left edge, since the filled box stands
159 * out from the flexa shape if the interval is big and the line
160 * thickness small. The difficulty here is to compute a proper
161 * slope value, as it should roughly be equal with the slope of
162 * the left end of the bezier curve.
164 Box left_edge_box (Interval (0, line_thickness),
165 Interval (-0.5 * left_height, +0.5 * left_height));
166 Stencil left_edge = Lookup::filled_box (left_edge_box);
167 stencil.add_stencil (left_edge);
169 Box right_edge_box (Interval (-line_thickness, 0),
170 Interval (-0.5 * right_height, +0.5 * right_height));
171 Stencil right_edge = Lookup::filled_box (right_edge_box);
172 right_edge.translate_axis (width, X_AXIS);
173 right_edge.translate_axis (corrected_interval / 2.0, Y_AXIS);
174 stencil.add_stencil (right_edge);
176 stencil.translate_axis (ypos_correction, Y_AXIS);
181 vaticana_brew_join (Grob *me, int delta_pitch,
182 Real join_thickness, Real blotdiameter)
184 Real staff_space = Staff_symbol_referencer::staff_space (me);
187 me->programming_error ("Vaticana_ligature: "
188 "zero join (delta_pitch == 0)");
189 return Lookup::blank (Box (Interval (0, 0), Interval (0, 0)));
191 Interval x_extent = Interval (0, join_thickness);
192 Interval y_extent = (delta_pitch > 0)
193 ? Interval (0, delta_pitch * 0.5 * staff_space) : // ascending join
194 Interval (delta_pitch * 0.5 * staff_space, 0); // descending join
195 Box join_box (x_extent, y_extent);
196 return Lookup::round_filled_box (join_box, blotdiameter);
200 vaticana_brew_primitive (Grob *me)
202 SCM glyph_name_scm = me->get_property ("glyph-name");
203 if (glyph_name_scm == SCM_EOL)
205 me->programming_error ("Vaticana_ligature: "
206 "undefined glyph-name -> ignoring grob");
207 return Lookup::blank (Box (Interval (0, 0), Interval (0, 0)));
210 string glyph_name = ly_scm2string (glyph_name_scm);
213 Real thickness = robust_scm2double (me->get_property ("thickness"), 1);
216 = thickness * me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
219 = (me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter")));
221 int pos = Staff_symbol_referencer::get_rounded_position (me);
223 SCM delta_pitch_scm = me->get_property ("delta-position");
225 if (delta_pitch_scm != SCM_EOL)
226 delta_pitch = scm_to_int (delta_pitch_scm);
230 Real x_offset = robust_scm2double (me->get_property ("x-offset"), 0);
232 bool add_stem = to_boolean (me->get_property ("add-stem"));
233 bool add_cauda = to_boolean (me->get_property ("add-cauda"));
234 bool add_join = to_boolean (me->get_property ("add-join"));
236 if (glyph_name == "")
239 * This is an empty head. This typically applies for the right
240 * side of a curved flexa shape, which is already typeset by the
241 * associated left side head. The only possible thing left to
242 * do is to draw a vertical join to the next head. (Urgh: need
245 Real staff_space = Staff_symbol_referencer::staff_space (me);
246 Real flexa_width = robust_scm2double (me->get_property ("flexa-width"), 2) * staff_space;
248 = Lookup::blank (Box (Interval (0, 0.5 * flexa_width), Interval (0, 0)));
250 else if (glyph_name == "flexa")
251 out = vaticana_brew_flexa (me, true, line_thickness);
255 = Font_interface::get_default_font (me)->
256 find_by_name ("noteheads.s" + glyph_name);
258 out.translate_axis (x_offset, X_AXIS);
259 Real head_width = out.extent (X_AXIS).length ();
264 = vaticana_brew_cauda (me, pos, delta_pitch,
265 line_thickness, blotdiameter);
266 out.add_stencil (cauda);
272 = vaticana_brew_cauda (me, pos, -1,
273 line_thickness, blotdiameter);
274 stem.translate_axis (head_width - line_thickness, X_AXIS);
275 out.add_stencil (stem);
281 = vaticana_brew_join (me, delta_pitch, line_thickness, blotdiameter);
282 join.translate_axis (head_width - line_thickness, X_AXIS);
283 out.add_stencil (join);
289 MAKE_SCHEME_CALLBACK (Vaticana_ligature, brew_ligature_primitive, 1);
291 Vaticana_ligature::brew_ligature_primitive (SCM smob)
293 Grob *me = Grob::unsmob (smob);
294 SCM primitive = vaticana_brew_primitive (me).smobbed_copy ();
298 MAKE_SCHEME_CALLBACK (Vaticana_ligature, print, 1);
300 Vaticana_ligature::print (SCM)
305 ADD_INTERFACE (Vaticana_ligature,
306 "A vaticana style Gregorian ligature.",