2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2004--2012 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"
28 output_scale (Output_def *od)
30 return scm_to_double (od->lookup_variable (ly_symbol2scm ("output-scale")));
34 get_font_table (Output_def *def)
36 SCM font_table = def->lookup_variable (ly_symbol2scm ("scaled-fonts"));
37 if (scm_hash_table_p (font_table) != SCM_BOOL_T)
39 font_table = scm_c_make_hash_table (11);
40 def->set_variable (ly_symbol2scm ("scaled-fonts"), font_table);
46 get_pango_font_table (Output_def *def)
48 SCM font_table = def->lookup_variable (ly_symbol2scm ("pango-fonts"));
49 if (scm_hash_table_p (font_table) != SCM_BOOL_T)
51 font_table = scm_c_make_hash_table (11);
52 def->set_variable (ly_symbol2scm ("pango-fonts"), font_table);
57 /* TODO: should add nesting for Output_def here too. */
59 find_scaled_font (Output_def *mod, Font_metric *f, Real m)
62 return find_scaled_font (mod->parent_, f, m);
64 Real lookup_mag = m / output_scale (mod);
66 SCM font_table = get_font_table (mod);
67 SCM sizes = scm_hashq_ref (font_table, f->self_scm (), SCM_EOL);
68 SCM handle = scm_assoc (scm_from_double (lookup_mag), sizes);
69 if (scm_is_pair (handle))
70 return unsmob_metrics (scm_cdr (handle));
72 SCM val = Modified_font_metric::make_scaled_font_metric (f, lookup_mag);
74 sizes = scm_acons (scm_from_double (lookup_mag), val, sizes);
75 unsmob_metrics (val)->unprotect ();
76 scm_hashq_set_x (font_table, f->self_scm (), sizes);
77 return unsmob_metrics (val);
81 find_pango_font (Output_def *layout, SCM descr, Real factor)
84 return find_pango_font (layout->parent_, descr, factor);
86 SCM table = get_pango_font_table (layout);
87 SCM sizes = scm_hash_ref (table, descr, SCM_EOL);
88 SCM size_key = scm_from_double (factor);
89 SCM handle = scm_assoc (size_key, sizes);
90 if (scm_is_pair (handle))
91 return unsmob_metrics (scm_cdr (handle));
93 PangoFontDescription *description
94 = pango_font_description_from_string (scm_i_string_chars (descr));
96 pango_font_description_set_size
98 gint (my_round (factor * pango_font_description_get_size (description))));
100 Font_metric *fm = all_fonts_global->find_pango_font (description,
101 output_scale (layout));
103 pango_font_description_free (description);
105 sizes = scm_acons (size_key, fm->self_scm (), sizes);
106 scm_hash_set_x (table, descr, sizes);
111 /* TODO: this is a nasty interface. During formatting,
112 the Output_def should be scaled to the output_scale_
113 specified in the toplevel Output_def. */
115 scale_output_def (Output_def *o, Real amount)
117 SCM proc = ly_lily_module_constant ("scale-layout");
118 SCM new_pap = scm_call_2 (proc, o->self_scm (), scm_from_double (amount));
120 o = unsmob_output_def (new_pap);