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 "open-type-font.hh"
26 #include <freetype/tttables.h>
28 #include "dimensions.hh"
29 #include "international.hh"
30 #include "modified-font-metric.hh"
34 load_table (char const *tag_str, FT_Face face, FT_ULong *length)
37 FT_ULong tag = FT_MAKE_TAG (tag_str[0], tag_str[1], tag_str[2], tag_str[3]);
39 FT_Error error_code = FT_Load_Sfnt_Table (face, tag, 0, NULL, length);
42 FT_Byte *buffer = (FT_Byte *) malloc (*length);
44 error (_f ("cannot allocate %lu bytes", *length));
46 error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length);
48 error (_f ("cannot load font table: %s", tag_str));
53 programming_error (_f ("FreeType error: %s",
54 freetype_error_string (error_code).c_str ()
61 Open_type_font::get_otf_table (string tag) const
63 return ::get_otf_table (face_, tag);
67 load_scheme_table (char const *tag_str, FT_Face face)
70 FT_Byte *buffer = load_table (tag_str, face, &length);
75 string contents ((char const *)buffer, length);
76 contents = "(quote (" + contents + "))";
78 tab = scm_c_eval_string (contents.c_str ());
84 Open_type_font::~Open_type_font ()
93 get_otf_table (FT_Face face, string tag)
96 FT_Byte *tab = load_table (tag.c_str (), face, &len);
97 string ret ((char const *) tab, len);
104 open_ft_face (string str, FT_Long idx)
107 FT_Error error_code = FT_New_Face (freetype2_library, str.c_str (), idx, &face);
109 if (error_code == FT_Err_Unknown_File_Format)
110 error (_f ("unsupported font format: %s", str.c_str ()));
112 error (_f ("error reading font file %s: %s",
114 freetype_error_string (error_code).c_str ()));
119 Open_type_font::make_otf (string str)
121 FT_Face face = open_ft_face (str, 0 /* index */);
122 Open_type_font *otf = new Open_type_font (face);
124 return otf->self_scm ();
127 Open_type_font::Open_type_font (FT_Face face)
130 lily_character_table_ = SCM_EOL;
131 lily_global_table_ = SCM_EOL;
132 lily_subfonts_ = SCM_EOL;
133 lily_index_to_bbox_table_ = SCM_EOL;
135 lily_character_table_ = alist_to_hashq (load_scheme_table ("LILC", face_));
136 lily_global_table_ = alist_to_hashq (load_scheme_table ("LILY", face_));
137 lily_subfonts_ = load_scheme_table ("LILF", face_);
138 index_to_charcode_map_ = make_index_to_charcode_map (face_);
140 lily_index_to_bbox_table_ = scm_c_make_hash_table (257);
144 Open_type_font::derived_mark () const
146 scm_gc_mark (lily_character_table_);
147 scm_gc_mark (lily_global_table_);
148 scm_gc_mark (lily_subfonts_);
149 scm_gc_mark (lily_index_to_bbox_table_);
153 Open_type_font::attachment_point (string glyph_name) const
155 SCM sym = ly_symbol2scm (glyph_name.c_str ());
156 SCM entry = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
159 if (entry == SCM_BOOL_F)
162 SCM char_alist = entry;
163 SCM att_scm = scm_cdr (scm_assq (ly_symbol2scm ("attachment"), char_alist));
165 return point_constant * ly_scm2offset (att_scm);
169 Open_type_font::get_indexed_char_dimensions (size_t signed_idx) const
171 if (SCM_HASHTABLE_P (lily_index_to_bbox_table_))
173 SCM box = scm_hashq_ref (lily_index_to_bbox_table_,
174 scm_from_unsigned_integer (signed_idx), SCM_BOOL_F);
175 Box *box_ptr = Box::unsmob (box);
180 if (SCM_HASHTABLE_P (lily_character_table_))
182 const size_t len = 256;
184 FT_Error code = FT_Get_Glyph_Name (face_, FT_UInt (signed_idx),
185 name, FT_UInt (len));
187 warning (_f ("FT_Get_Glyph_Name () Freetype error: %s",
188 freetype_error_string (code)));
190 SCM sym = ly_symbol2scm (name);
191 SCM alist = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
193 if (alist != SCM_BOOL_F)
195 SCM bbox = scm_cdr (scm_assq (ly_symbol2scm ("bbox"), alist));
198 b[X_AXIS][LEFT] = scm_to_double (scm_car (bbox));
199 bbox = scm_cdr (bbox);
200 b[Y_AXIS][LEFT] = scm_to_double (scm_car (bbox));
201 bbox = scm_cdr (bbox);
202 b[X_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
203 bbox = scm_cdr (bbox);
204 b[Y_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
205 bbox = scm_cdr (bbox);
207 b.scale (point_constant);
209 scm_hashq_set_x (lily_index_to_bbox_table_,
210 scm_from_unsigned_integer (signed_idx),
216 FT_UInt idx = FT_UInt (signed_idx);
217 FT_Load_Glyph (face_, idx, FT_LOAD_NO_SCALE);
219 FT_Glyph_Metrics m = face_->glyph->metrics;
220 FT_Pos hb = m.horiBearingX;
221 FT_Pos vb = m.horiBearingY;
222 Box b (Interval (Real (-hb), Real (m.width - hb)),
223 Interval (Real (-vb), Real (m.height - vb)));
225 b.scale (design_size () / Real (face_->units_per_EM));
230 Open_type_font::name_to_index (string nm) const
232 char *nm_str = (char *) nm.c_str ();
233 if (FT_UInt idx = FT_Get_Name_Index (face_, nm_str))
240 Open_type_font::index_to_charcode (size_t i) const
242 map<FT_UInt, FT_ULong>::const_iterator iter;
243 iter = index_to_charcode_map_.find (FT_UInt (i));
245 if (iter != index_to_charcode_map_.end ())
246 return (size_t) iter->second;
249 programming_error ("Invalid index for character");
255 Open_type_font::count () const
257 return index_to_charcode_map_.size ();
261 Open_type_font::design_size () const
263 SCM entry = scm_hashq_ref (lily_global_table_,
264 ly_symbol2scm ("design_size"),
267 Hmm. Design size is arbitrary for
268 non-design-size fonts. I vote for 1 -
269 which will trip errors more
272 scm_from_unsigned_integer (1));
273 return scm_to_double (entry) * Real (point_constant);
277 Open_type_font::sub_fonts () const
279 return lily_subfonts_;
283 Open_type_font::get_char_table () const
285 return lily_character_table_;
289 Open_type_font::get_subfonts () const
291 return lily_subfonts_;
295 Open_type_font::get_global_table () const
297 return lily_global_table_;
301 Open_type_font::font_name () const
303 return FT_Get_Postscript_Name (face_);
307 Open_type_font::glyph_list () const
309 SCM retval = SCM_EOL;
312 for (int i = 0; i < face_->num_glyphs; i++)
314 const size_t len = 256;
316 FT_Error code = FT_Get_Glyph_Name (face_, i, name, len);
318 warning (_f ("FT_Get_Glyph_Name () error: %s",
319 freetype_error_string (code).c_str ()));
321 *tail = scm_cons (scm_from_locale_string (name), SCM_EOL);
322 tail = SCM_CDRLOC (*tail);