2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2004--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
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 "dimensions.hh"
21 #include "libc-extension.hh"
22 #include "output-def.hh"
23 #include "modified-font-metric.hh"
24 #include "pango-font.hh"
25 #include "all-font-metrics.hh"
26 #include "lily-imports.hh"
29 output_scale (Output_def *od)
31 return scm_to_double (od->lookup_variable (ly_symbol2scm ("output-scale")));
35 get_font_table (Output_def *def)
37 SCM font_table = def->lookup_variable (ly_symbol2scm ("scaled-fonts"));
38 if (!to_boolean (scm_hash_table_p (font_table)))
40 font_table = scm_c_make_hash_table (11);
41 def->set_variable (ly_symbol2scm ("scaled-fonts"), font_table);
47 get_pango_font_table (Output_def *def)
49 SCM font_table = def->lookup_variable (ly_symbol2scm ("pango-fonts"));
50 if (!to_boolean (scm_hash_table_p (font_table)))
52 font_table = scm_c_make_hash_table (11);
53 def->set_variable (ly_symbol2scm ("pango-fonts"), font_table);
58 /* TODO: should add nesting for Output_def here too. */
60 find_scaled_font (Output_def *mod, Font_metric *f, Real m)
63 return find_scaled_font (mod->parent_, f, m);
65 Real lookup_mag = m / output_scale (mod);
67 SCM font_table = get_font_table (mod);
68 SCM sizes = scm_hashq_ref (font_table, f->self_scm (), SCM_EOL);
69 SCM handle = scm_assoc (scm_from_double (lookup_mag), sizes);
70 if (scm_is_pair (handle))
71 return unsmob<Font_metric> (scm_cdr (handle));
73 SCM val = Modified_font_metric::make_scaled_font_metric (f, lookup_mag);
75 sizes = scm_acons (scm_from_double (lookup_mag), val, sizes);
76 unsmob<Font_metric> (val)->unprotect ();
77 scm_hashq_set_x (font_table, f->self_scm (), sizes);
78 return unsmob<Font_metric> (val);
82 find_pango_font (Output_def *layout, SCM descr, Real factor)
85 return find_pango_font (layout->parent_, descr, factor);
87 SCM table = get_pango_font_table (layout);
88 SCM sizes = scm_hash_ref (table, descr, SCM_EOL);
89 SCM size_key = scm_from_double (factor);
90 SCM handle = scm_assoc (size_key, sizes);
91 if (scm_is_pair (handle))
92 return unsmob<Font_metric> (scm_cdr (handle));
94 PangoFontDescription *description
95 = pango_font_description_from_string (scm_i_string_chars (descr));
97 pango_font_description_set_size
99 gint (my_round (factor * pango_font_description_get_size (description))));
101 Font_metric *fm = all_fonts_global->find_pango_font (description,
102 output_scale (layout));
104 pango_font_description_free (description);
106 sizes = scm_acons (size_key, fm->self_scm (), sizes);
107 scm_hash_set_x (table, descr, sizes);
112 /* TODO: this is a nasty interface. During formatting,
113 the Output_def should be scaled to the output_scale_
114 specified in the toplevel Output_def. */
116 scale_output_def (Output_def *o, Real amount)
118 SCM new_pap = Lily::scale_layout (o->self_scm (), scm_from_double (amount));
120 o = unsmob<Output_def> (new_pap);