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"
21 #include "freetype.hh"
27 #include FT_TRUETYPE_TABLES_H
29 #include "dimensions.hh"
30 #include "freetype.hh"
31 #include "international.hh"
32 #include "modified-font-metric.hh"
36 load_table (char const *tag_str, FT_Face face, FT_ULong *length)
39 FT_ULong tag = FT_MAKE_TAG (tag_str[0], tag_str[1], tag_str[2], tag_str[3]);
41 FT_Error error_code = FT_Load_Sfnt_Table (face, tag, 0, NULL, length);
44 FT_Byte *buffer = (FT_Byte *) malloc (*length);
46 error (_f ("cannot allocate %lu bytes", *length));
48 error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length);
50 error (_f ("cannot load font table: %s", tag_str));
55 programming_error (_f ("FreeType error: %s",
56 freetype_error_string (error_code).c_str ()
63 Open_type_font::get_otf_table (const string &tag) const
65 return ::get_otf_table (face_, tag);
69 load_scheme_table (char const *tag_str, FT_Face face)
72 FT_Byte *buffer = load_table (tag_str, face, &length);
77 string contents ((char const *)buffer, length);
78 contents = "(quote (" + contents + "))";
80 tab = scm_c_eval_string (contents.c_str ());
86 Open_type_font::~Open_type_font ()
95 get_otf_table (FT_Face face, const string &tag)
98 FT_Byte *tab = load_table (tag.c_str (), face, &len);
99 string ret ((char const *) tab, len);
106 open_ft_face (const string &str, FT_Long idx)
109 FT_Error error_code = FT_New_Face (freetype2_library, str.c_str (), idx, &face);
111 if (error_code == FT_Err_Unknown_File_Format)
112 error (_f ("unsupported font format: %s", str.c_str ()));
114 error (_f ("error reading font file %s: %s",
116 freetype_error_string (error_code).c_str ()));
121 Open_type_font::make_otf (const string &str)
123 FT_Face face = open_ft_face (str, 0 /* index */);
124 Open_type_font *otf = new Open_type_font (face);
126 return otf->self_scm ();
129 Open_type_font::Open_type_font (FT_Face face)
132 lily_character_table_ = SCM_EOL;
133 lily_global_table_ = SCM_EOL;
134 lily_subfonts_ = SCM_EOL;
135 lily_index_to_bbox_table_ = SCM_EOL;
137 lily_character_table_ = alist_to_hashq (load_scheme_table ("LILC", face_));
138 lily_global_table_ = alist_to_hashq (load_scheme_table ("LILY", face_));
139 lily_subfonts_ = load_scheme_table ("LILF", face_);
140 index_to_charcode_map_ = make_index_to_charcode_map (face_);
142 lily_index_to_bbox_table_ = scm_c_make_hash_table (257);
146 Open_type_font::derived_mark () const
148 scm_gc_mark (lily_character_table_);
149 scm_gc_mark (lily_global_table_);
150 scm_gc_mark (lily_subfonts_);
151 scm_gc_mark (lily_index_to_bbox_table_);
155 Open_type_font::attachment_point (const string &glyph_name) const
157 SCM sym = ly_symbol2scm (glyph_name.c_str ());
158 SCM entry = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
161 if (entry == SCM_BOOL_F)
164 SCM char_alist = entry;
165 SCM att_scm = scm_cdr (scm_assq (ly_symbol2scm ("attachment"), char_alist));
167 return point_constant * ly_scm2offset (att_scm);
171 Open_type_font::get_indexed_char_dimensions (size_t signed_idx) const
173 if (SCM_HASHTABLE_P (lily_index_to_bbox_table_))
175 SCM box = scm_hashq_ref (lily_index_to_bbox_table_,
176 scm_from_unsigned_integer (signed_idx), SCM_BOOL_F);
177 Box *box_ptr = Box::unsmob (box);
182 if (SCM_HASHTABLE_P (lily_character_table_))
184 const size_t len = 256;
186 FT_Error code = FT_Get_Glyph_Name (face_, FT_UInt (signed_idx),
187 name, FT_UInt (len));
189 warning (_f ("FT_Get_Glyph_Name () Freetype error: %s",
190 freetype_error_string (code)));
192 SCM sym = ly_symbol2scm (name);
193 SCM alist = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
195 if (alist != SCM_BOOL_F)
197 SCM bbox = scm_cdr (scm_assq (ly_symbol2scm ("bbox"), alist));
200 b[X_AXIS][LEFT] = scm_to_double (scm_car (bbox));
201 bbox = scm_cdr (bbox);
202 b[Y_AXIS][LEFT] = scm_to_double (scm_car (bbox));
203 bbox = scm_cdr (bbox);
204 b[X_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
205 bbox = scm_cdr (bbox);
206 b[Y_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
207 bbox = scm_cdr (bbox);
209 b.scale (point_constant);
211 scm_hashq_set_x (lily_index_to_bbox_table_,
212 scm_from_unsigned_integer (signed_idx),
218 Box b = get_unscaled_indexed_char_dimensions (signed_idx);
220 b.scale (design_size () / Real (face_->units_per_EM));
225 Open_type_font::get_units_per_EM () const
227 return face_->units_per_EM;
231 Open_type_font::name_to_index (string nm) const
233 char *nm_str = (char *) nm.c_str ();
234 if (FT_UInt idx = FT_Get_Name_Index (face_, nm_str))
241 Open_type_font::get_unscaled_indexed_char_dimensions (size_t signed_idx) const
243 return ly_FT_get_unscaled_indexed_char_dimensions (face_, signed_idx);
247 Open_type_font::get_glyph_outline_bbox (size_t signed_idx) const
249 return ly_FT_get_glyph_outline_bbox (face_, signed_idx);
253 Open_type_font::get_glyph_outline (size_t signed_idx) const
255 return ly_FT_get_glyph_outline (face_, signed_idx);
259 Open_type_font::index_to_charcode (size_t i) const
261 map<FT_UInt, FT_ULong>::const_iterator iter;
262 iter = index_to_charcode_map_.find (FT_UInt (i));
264 if (iter != index_to_charcode_map_.end ())
265 return (size_t) iter->second;
268 programming_error ("Invalid index for character");
274 Open_type_font::count () const
276 return index_to_charcode_map_.size ();
280 Open_type_font::design_size () const
282 SCM entry = scm_hashq_ref (lily_global_table_,
283 ly_symbol2scm ("design_size"),
286 Hmm. Design size is arbitrary for
287 non-design-size fonts. I vote for 1 -
288 which will trip errors more
291 scm_from_unsigned_integer (1));
292 return scm_to_double (entry) * Real (point_constant);
296 Open_type_font::sub_fonts () const
298 return lily_subfonts_;
302 Open_type_font::get_char_table () const
304 return lily_character_table_;
308 Open_type_font::get_subfonts () const
310 return lily_subfonts_;
314 Open_type_font::get_global_table () const
316 return lily_global_table_;
320 Open_type_font::font_name () const
322 return FT_Get_Postscript_Name (face_);
326 Open_type_font::glyph_list () const
328 SCM retval = SCM_EOL;
331 for (int i = 0; i < face_->num_glyphs; i++)
333 const size_t len = 256;
335 FT_Error code = FT_Get_Glyph_Name (face_, i, name, len);
337 warning (_f ("FT_Get_Glyph_Name () error: %s",
338 freetype_error_string (code).c_str ()));
340 *tail = scm_cons (scm_from_locale_string (name), SCM_EOL);
341 tail = SCM_CDRLOC (*tail);