2 font-interface.cc -- implement Font_interface
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "all-font-metrics.hh"
11 #include "font-metric.hh"
12 #include "font-interface.hh"
14 #include "paper-def.hh"
19 TODO revise font handling.
22 * relative sizes should relate to staff-space, eg. font-staff-space
25 * If a relative size is given, lily should magnify the closest
26 design size font to match that. (ie. fonts should have variable
29 (this requires that fonts are stored as (filename , designsize))
36 Font_interface::font_alist_chain (Grob *me)
39 Ugh: why the defaults?
41 SCM defaults = me->get_paper ()->lookup_variable (ly_symbol2scm ("font-defaults"));
43 SCM ch = me->get_property_alist_chain (defaults);
48 MAKE_SCHEME_CALLBACK(Font_interface, get_property_alist_chain, 1);
50 Font_interface::get_property_alist_chain (SCM grob)
52 Grob * g = unsmob_grob (grob);
53 SCM_ASSERT_TYPE(g, grob, SCM_ARG1, __FUNCTION__, "grob");
54 return font_alist_chain (g);
58 todo: split up this func, reuse in text_item?
61 Font_interface::get_default_font (Grob*me)
63 Font_metric * fm = unsmob_metrics (me->get_grob_property ("font"));
67 fm = get_font (me->get_paper (), font_alist_chain (me));
68 me->set_grob_property ("font", fm->self_scm ());
73 LY_DEFINE(ly_font_interface_get_default_font,
74 "ly:get-default-font", 1 , 0, 0,
75 (SCM grob), "Return the default font for grob @var{gr}.")
77 Grob * gr = unsmob_grob (grob);
78 SCM_ASSERT_TYPE(gr, grob, SCM_ARG1, __FUNCTION__, "grob");
80 return Font_interface::get_default_font (gr)->self_scm ();
85 Font_interface::get_font (Paper_def *paper, SCM chain)
87 SCM name = ly_assoc_chain (ly_symbol2scm ("font-name"), chain);
89 if (!gh_pair_p (name) || !gh_string_p (gh_cdr (name)))
91 SCM proc = paper->lookup_variable (ly_symbol2scm ("properties-to-font"));
92 SCM fonts = paper->lookup_variable (ly_symbol2scm ("fonts"));
94 assert (gh_procedure_p (proc));
95 name = gh_call2 (proc, fonts, chain);
100 SCM mag = ly_assoc_chain (ly_symbol2scm ("font-magnification"), chain);
102 Real rmag = gh_pair_p (mag) && gh_number_p (gh_cdr (mag))
103 ? gh_scm2double (gh_cdr (mag)) : 1.0;
105 Font_metric *fm = paper->find_font (name, rmag);
110 SCM routines for looking up fonts.
129 static SCM shape_sym, family_sym, series_sym, rel_str0_sym, design_str0_sym, wild_sym;
135 shape_sym = scm_permanent_object (ly_symbol2scm ("font-shape"));
136 family_sym = scm_permanent_object (ly_symbol2scm ("font-family"));
137 series_sym = scm_permanent_object (ly_symbol2scm ("font-series"));
138 rel_str0_sym = scm_permanent_object (ly_symbol2scm ("font-relative-size"));
139 design_str0_sym = scm_permanent_object (ly_symbol2scm ("font-design-size"));
140 wild_sym = scm_permanent_object (ly_symbol2scm ("*"));
143 ADD_SCM_INIT_FUNC(fi_init_syms, init_syms);
146 Font_interface::wild_compare (SCM field_val, SCM val)
148 return (val == SCM_BOOL_F || field_val == wild_sym || field_val == val);
152 MAKE_SCHEME_CALLBACK (Font_interface,properties_to_font_name,2);
154 Font_interface::properties_to_font_name (SCM fonts, SCM alist_chain)
156 SCM shape = SCM_BOOL_F;
157 SCM family = SCM_BOOL_F;
158 SCM series = SCM_BOOL_F;
161 SCM point_str0 = ly_assoc_chain (design_str0_sym, alist_chain);
162 SCM rel_str0 = SCM_BOOL_F;
164 shape = ly_assoc_chain (shape_sym, alist_chain);
165 family = ly_assoc_chain (family_sym, alist_chain);
166 series = ly_assoc_chain (series_sym, alist_chain);
168 if (gh_pair_p (shape))
169 shape = ly_cdr (shape);
170 if (gh_pair_p (family))
171 family = ly_cdr (family);
172 if (gh_pair_p (series))
173 series = ly_cdr (series);
176 if (gh_pair_p (point_str0))
177 point_str0 = ly_cdr (point_str0);
180 rel_str0 = ly_assoc_chain (rel_str0_sym, alist_chain);
181 if (gh_pair_p (rel_str0))
182 rel_str0 = ly_cdr (rel_str0);
185 for (SCM s = fonts ; gh_pair_p (s); s = ly_cdr (s))
187 SCM qlist = ly_caar (s);
189 if (!wild_compare (scm_list_ref (qlist, gh_int2scm (1)), series))
191 if (!wild_compare (scm_list_ref (qlist, gh_int2scm (2)), shape))
193 if (!wild_compare (scm_list_ref (qlist, gh_int2scm (3)), family))
196 if (point_str0 == SCM_BOOL_F && !wild_compare (ly_car (qlist), rel_str0))
199 SCM qname = ly_cdar (s);
203 warning (_ ("couldn't find any font satisfying "));
204 scm_write (scm_list_n (point_str0, shape, series , family, rel_str0,
205 SCM_UNDEFINED), scm_current_error_port ());
206 scm_flush (scm_current_error_port ());
208 return scm_makfrom0str ("cmr10");
214 ADD_INTERFACE (Font_interface, "font-interface",
215 "Any symbol that is typeset through fixed sets of glyphs (ie. fonts)",
216 "font-magnification font font-series font-shape font-family font-name font-design-size font-relative-size");