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, 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 ();
83 LY_DEFINE(ly_font_interface_get_font,"ly:get-font", 2, 0, 0,
84 (SCM grob, SCM chain),
85 "Return a font metric satisfying the font-qualifiers in the alist chain @var{chain}.\n"
87 "The font object represents the metric information of a font. Every font\n"
88 "that is loaded into LilyPond can be accessed via Scheme. \n"
90 "LilyPond only needs to know the dimension of glyph to be able to process\n"
91 "them. This information is stored in font metric files. LilyPond can read\n"
92 "two types of font-metrics: @TeX{} Font Metric files (TFM files) and\n"
93 "Adobe Font Metric files (AFM files). LilyPond will always try to load\n"
94 "AFM files first since they are more versatile.\n"
96 "An alist chain is a list of alists.\n")
98 Grob * gr = unsmob_grob (grob);
99 SCM_ASSERT_TYPE(gr, grob, SCM_ARG1, __FUNCTION__, "grob");
101 Font_metric*fm = Font_interface::get_font (gr, chain);
102 return fm->self_scm();
107 Font_interface::get_font (Grob *me, SCM chain)
109 SCM name = ly_assoc_chain (ly_symbol2scm ("font-name"), chain);
111 if (!gh_pair_p (name) || !gh_string_p (gh_cdr (name)))
113 Paper_def * p = me->get_paper ();
115 SCM proc = p->lookup_variable (ly_symbol2scm ("properties-to-font"));
116 SCM fonts = p->lookup_variable (ly_symbol2scm ("fonts"));
118 assert (gh_procedure_p (proc));
119 name = gh_call2 (proc, fonts, chain);
122 name = gh_cdr (name);
124 SCM mag = ly_assoc_chain (ly_symbol2scm ("font-magnification"), chain);
126 Real rmag = gh_pair_p (mag) && gh_number_p (gh_cdr (mag))
127 ? gh_scm2double (gh_cdr (mag)) : 1.0;
129 Font_metric *fm = me->get_paper ()->find_font (name, rmag);
134 Font_interface::add_style (Grob* me, SCM style, SCM chain)
136 assert (gh_symbol_p (style));
138 SCM style_alist = me->get_paper ()->lookup_variable (ly_symbol2scm ("style-alist"));
139 SCM entry = scm_assoc (style, style_alist);
140 if (gh_pair_p (entry))
142 chain = gh_cons (ly_cdr (entry), chain);
150 Interpreting music...
151 MIDI output to wtk1-fugue2.midi...
167 static SCM shape_sym, family_sym, series_sym, rel_str0_sym, design_str0_sym, wild_sym;
173 shape_sym = scm_permanent_object (ly_symbol2scm ("font-shape"));
174 family_sym = scm_permanent_object (ly_symbol2scm ("font-family"));
175 series_sym = scm_permanent_object (ly_symbol2scm ("font-series"));
176 rel_str0_sym = scm_permanent_object (ly_symbol2scm ("font-relative-size"));
177 design_str0_sym = scm_permanent_object (ly_symbol2scm ("font-design-size"));
178 wild_sym = scm_permanent_object (ly_symbol2scm ("*"));
181 ADD_SCM_INIT_FUNC(fi_init_syms, init_syms);
184 Font_interface::wild_compare (SCM field_val, SCM val)
186 return (val == SCM_BOOL_F || field_val == wild_sym || field_val == val);
190 MAKE_SCHEME_CALLBACK (Font_interface,properties_to_font_name,2);
192 Font_interface::properties_to_font_name (SCM fonts, SCM alist_chain)
194 SCM shape = SCM_BOOL_F;
195 SCM family = SCM_BOOL_F;
196 SCM series = SCM_BOOL_F;
199 SCM point_str0 = ly_assoc_chain (design_str0_sym, alist_chain);
200 SCM rel_str0 = SCM_BOOL_F;
202 shape = ly_assoc_chain (shape_sym, alist_chain);
203 family = ly_assoc_chain (family_sym, alist_chain);
204 series = ly_assoc_chain (series_sym, alist_chain);
206 if (gh_pair_p (shape))
207 shape = ly_cdr (shape);
208 if (gh_pair_p (family))
209 family = ly_cdr (family);
210 if (gh_pair_p (series))
211 series = ly_cdr (series);
214 if (gh_pair_p (point_str0))
215 point_str0 = ly_cdr (point_str0);
218 rel_str0 = ly_assoc_chain (rel_str0_sym, alist_chain);
219 if (gh_pair_p (rel_str0))
220 rel_str0 = ly_cdr (rel_str0);
223 for (SCM s = fonts ; gh_pair_p (s); s = ly_cdr (s))
225 SCM qlist = ly_caar (s);
227 if (!wild_compare (scm_list_ref (qlist, gh_int2scm (1)), series))
229 if (!wild_compare (scm_list_ref (qlist, gh_int2scm (2)), shape))
231 if (!wild_compare (scm_list_ref (qlist, gh_int2scm (3)), family))
234 if (point_str0 == SCM_BOOL_F && !wild_compare (ly_car (qlist), rel_str0))
237 SCM qname = ly_cdar (s);
241 warning (_ ("couldn't find any font satisfying "));
242 scm_write (scm_list_n (point_str0, shape, series , family, rel_str0,
243 SCM_UNDEFINED), scm_current_error_port ());
244 scm_flush (scm_current_error_port ());
246 return scm_makfrom0str ("cmr10");
252 ADD_INTERFACE (Font_interface, "font-interface",
253 "Any symbol that is typeset through fixed sets of glyphs (ie. fonts)",
254 "font-magnification font-style font font-series font-shape font-family font-name font-design-size font-relative-size");