2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2004--2015 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 "international.hh"
31 #include "modified-font-metric.hh"
38 load_table (char const *tag_str, FT_Face face, FT_ULong *length)
41 FT_ULong tag = FT_MAKE_TAG (tag_str[0], tag_str[1], tag_str[2], tag_str[3]);
43 FT_Error error_code = FT_Load_Sfnt_Table (face, tag, 0, NULL, length);
46 FT_Byte *buffer = (FT_Byte *) malloc (*length);
48 error (_f ("cannot allocate %lu bytes", *length));
50 error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length);
52 error (_f ("cannot load font table: %s", tag_str));
57 programming_error (_f ("FreeType error: %s",
58 freetype_error_string (error_code).c_str ()
65 Open_type_font::get_otf_table (const string &tag) const
67 return ::get_otf_table (face_, tag);
71 load_scheme_table (char const *tag_str, FT_Face face)
74 FT_Byte *buffer = load_table (tag_str, face, &length);
79 string contents ((char const *)buffer, length);
80 contents = "(quote (" + contents + "))";
83 tab = scm_eval_string (scm_from_utf8_string (contents.c_str ()));
85 tab = scm_c_eval_string (contents.c_str ());
92 Open_type_font::~Open_type_font ()
101 get_otf_table (FT_Face face, const string &tag)
104 FT_Byte *tab = load_table (tag.c_str (), face, &len);
105 string ret ((char const *) tab, len);
112 open_ft_face (const string &str, FT_Long idx)
115 FT_Error error_code = FT_New_Face (freetype2_library, str.c_str (), idx, &face);
117 if (error_code == FT_Err_Unknown_File_Format)
118 error (_f ("unsupported font format: %s", str.c_str ()));
120 error (_f ("error reading font file %s: %s",
122 freetype_error_string (error_code).c_str ()));
127 Open_type_font::make_otf (const string &str)
129 FT_Face face = open_ft_face (str, 0 /* index */);
130 Open_type_font *otf = new Open_type_font (face);
132 return otf->self_scm ();
135 Open_type_font::Open_type_font (FT_Face face)
138 lily_character_table_ = SCM_EOL;
139 lily_global_table_ = SCM_EOL;
140 lily_subfonts_ = SCM_EOL;
141 lily_index_to_bbox_table_ = SCM_EOL;
143 lily_character_table_ = alist_to_hashq (load_scheme_table ("LILC", face_));
144 lily_global_table_ = alist_to_hashq (load_scheme_table ("LILY", face_));
145 lily_subfonts_ = load_scheme_table ("LILF", face_);
146 index_to_charcode_map_ = make_index_to_charcode_map (face_);
148 lily_index_to_bbox_table_ = scm_c_make_hash_table (257);
152 Open_type_font::derived_mark () const
154 scm_gc_mark (lily_character_table_);
155 scm_gc_mark (lily_global_table_);
156 scm_gc_mark (lily_subfonts_);
157 scm_gc_mark (lily_index_to_bbox_table_);
161 Open_type_font::attachment_point (const string &glyph_name) const
163 SCM sym = ly_symbol2scm (glyph_name.c_str ());
164 SCM entry = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
167 if (scm_is_false (entry))
170 SCM char_alist = entry;
171 SCM att_scm = scm_cdr (scm_assq (ly_symbol2scm ("attachment"), char_alist));
173 return point_constant * ly_scm2offset (att_scm);
177 Open_type_font::get_indexed_char_dimensions (size_t signed_idx) const
179 if (SCM_HASHTABLE_P (lily_index_to_bbox_table_))
181 SCM box = scm_hashq_ref (lily_index_to_bbox_table_,
182 scm_from_unsigned_integer (signed_idx), SCM_BOOL_F);
183 Box *box_ptr = unsmob<Box> (box);
188 if (SCM_HASHTABLE_P (lily_character_table_))
190 const size_t len = 256;
192 FT_Error code = FT_Get_Glyph_Name (face_, FT_UInt (signed_idx),
193 name, FT_UInt (len));
195 warning (_f ("FT_Get_Glyph_Name () Freetype error: %s",
196 freetype_error_string (code)));
198 SCM sym = ly_symbol2scm (name);
199 SCM alist = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
201 if (scm_is_true (alist))
203 SCM bbox = scm_cdr (scm_assq (ly_symbol2scm ("bbox"), alist));
206 b[X_AXIS][LEFT] = scm_to_double (scm_car (bbox));
207 bbox = scm_cdr (bbox);
208 b[Y_AXIS][LEFT] = scm_to_double (scm_car (bbox));
209 bbox = scm_cdr (bbox);
210 b[X_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
211 bbox = scm_cdr (bbox);
212 b[Y_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
213 bbox = scm_cdr (bbox);
215 b.scale (point_constant);
217 scm_hashq_set_x (lily_index_to_bbox_table_,
218 scm_from_unsigned_integer (signed_idx),
224 Box b = get_unscaled_indexed_char_dimensions (signed_idx);
226 b.scale (design_size () / Real (face_->units_per_EM));
231 Open_type_font::get_units_per_EM () const
233 return face_->units_per_EM;
237 Open_type_font::name_to_index (string nm) const
239 char *nm_str = (char *) nm.c_str ();
240 if (FT_UInt idx = FT_Get_Name_Index (face_, nm_str))
247 Open_type_font::get_unscaled_indexed_char_dimensions (size_t signed_idx) const
249 return ly_FT_get_unscaled_indexed_char_dimensions (face_, signed_idx);
253 Open_type_font::get_glyph_outline_bbox (size_t signed_idx) const
255 return ly_FT_get_glyph_outline_bbox (face_, signed_idx);
259 Open_type_font::get_glyph_outline (size_t signed_idx) const
261 return ly_FT_get_glyph_outline (face_, signed_idx);
265 Open_type_font::index_to_charcode (size_t i) const
267 map<FT_UInt, FT_ULong>::const_iterator iter;
268 iter = index_to_charcode_map_.find (FT_UInt (i));
270 if (iter != index_to_charcode_map_.end ())
271 return (size_t) iter->second;
274 programming_error ("Invalid index for character");
280 Open_type_font::count () const
282 return index_to_charcode_map_.size ();
286 Open_type_font::design_size () const
288 SCM entry = scm_hashq_ref (lily_global_table_,
289 ly_symbol2scm ("design_size"),
292 Hmm. Design size is arbitrary for
293 non-design-size fonts. I vote for 1 -
294 which will trip errors more
297 scm_from_unsigned_integer (1));
298 return scm_to_double (entry) * Real (point_constant);
302 Open_type_font::sub_fonts () const
304 return lily_subfonts_;
308 Open_type_font::get_char_table () const
310 return lily_character_table_;
314 Open_type_font::get_subfonts () const
316 return lily_subfonts_;
320 Open_type_font::get_global_table () const
322 return lily_global_table_;
326 Open_type_font::font_name () const
328 return FT_Get_Postscript_Name (face_);
332 Open_type_font::glyph_list () const
334 SCM retval = SCM_EOL;
337 for (int i = 0; i < face_->num_glyphs; i++)
339 const size_t len = 256;
341 FT_Error code = FT_Get_Glyph_Name (face_, i, name, len);
343 warning (_f ("FT_Get_Glyph_Name () error: %s",
344 freetype_error_string (code).c_str ()));
346 *tail = scm_cons (scm_from_ascii_string (name), SCM_EOL);
347 tail = SCM_CDRLOC (*tail);