2 pango-select.cc -- implement lily font selection for Pango_fonts.
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "dimensions.hh"
11 #include "all-font-metrics.hh"
12 #include "output-def.hh"
13 #include "pango-font.hh"
15 PangoFontDescription *
16 properties_to_pango_description (SCM chain, Real text_size)
18 SCM name = ly_chain_assoc (ly_symbol2scm ("font-name"), chain);
20 PangoFontDescription *description = 0;
21 if (scm_is_pair (name) && scm_is_string (scm_cdr (name)))
23 String name_str = ly_scm2string (scm_cdr (name));
24 description = pango_font_description_from_string (name_str.to_str0 ());
28 SCM family = ly_chain_assoc_get (ly_symbol2scm ("font-family"), chain,
30 SCM variant = ly_chain_assoc_get (ly_symbol2scm ("font-shape"), chain,
33 SCM style = ly_chain_assoc_get (ly_symbol2scm ("font-shape"), chain,
35 SCM weight = ly_chain_assoc_get (ly_symbol2scm ("font-series"), chain,
39 = symbols_to_pango_font_description (family, style, variant, weight,
43 Real step = robust_scm2double (ly_symbol2scm ("font-size"), 0.0);
44 Real size = text_size * pow (2.0, step / 6.0);
46 pango_font_description_set_size (description,
47 gint (size * PANGO_SCALE));
52 select_pango_font (Output_def *layout, SCM chain)
54 PangoFontDescription *pfd = properties_to_pango_description (chain,
55 point_constant * layout->get_dimension (ly_symbol2scm ("text-font-size")));
57 char *str = pango_font_description_to_string (pfd);
58 SCM scm_str = scm_makfrom0str (str);
61 return find_pango_font (layout, scm_str, 1.0);
65 symbol_to_pango_style (SCM style)
67 PangoStyle pstyle = PANGO_STYLE_NORMAL;
68 if (style == ly_symbol2scm ("italic"))
70 pstyle = PANGO_STYLE_ITALIC;
72 else if (style == ly_symbol2scm ("oblique")
73 || style == ly_symbol2scm ("slanted"))
75 pstyle = PANGO_STYLE_OBLIQUE;
82 symbol_to_pango_variant (SCM variant)
84 PangoVariant pvariant = PANGO_VARIANT_NORMAL;
85 if (variant == ly_symbol2scm ("caps"))
87 pvariant = PANGO_VARIANT_SMALL_CAPS;
93 symbol_to_pango_weight (SCM weight)
95 PangoWeight pw = PANGO_WEIGHT_NORMAL;
96 if (weight == ly_symbol2scm ("bold"))
98 pw = PANGO_WEIGHT_BOLD;
100 if (weight == ly_symbol2scm ("heavy"))
102 pw = PANGO_WEIGHT_HEAVY;
104 if (weight == ly_symbol2scm ("ultrabold"))
106 pw = PANGO_WEIGHT_ULTRABOLD;
108 if (weight == ly_symbol2scm ("light"))
110 pw = PANGO_WEIGHT_LIGHT;
112 if (weight == ly_symbol2scm ("ultralight"))
114 pw = PANGO_WEIGHT_ULTRALIGHT;
121 symbol_to_pango_stretch (SCM) // stretch)
123 PangoStretch ps = PANGO_STRETCH_NORMAL;
128 PANGO_STRETCH_ULTRA_CONDENSED,
129 PANGO_STRETCH_EXTRA_CONDENSED,
130 PANGO_STRETCH_CONDENSED,
131 PANGO_STRETCH_SEMI_CONDENSED,
133 PANGO_STRETCH_SEMI_EXPANDED,
134 PANGO_STRETCH_EXPANDED,
135 PANGO_STRETCH_EXTRA_EXPANDED,
136 PANGO_STRETCH_ULTRA_EXPANDED
141 PangoFontDescription *
142 symbols_to_pango_font_description (SCM family,
148 PangoFontDescription *description = pango_font_description_new ();
150 String family_str = "roman";
151 if (scm_is_symbol (family))
152 family_str = ly_symbol2string (family);
153 else if (scm_is_string (family))
154 family_str = ly_scm2string (family);
156 pango_font_description_set_family (description,
157 family_str.to_str0 ());
158 pango_font_description_set_style (description,
159 symbol_to_pango_style (style));
160 pango_font_description_set_variant (description,
161 symbol_to_pango_variant (variant));
162 pango_font_description_set_weight (description,
163 symbol_to_pango_weight (weight));
164 pango_font_description_set_stretch (description,
165 symbol_to_pango_stretch (stretch));