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 // Necessary for supporting pango_context_new() and
21 // pango_context_set_font_map() in Pango < 1.22
22 #define PANGO_ENABLE_BACKEND
24 #include <pango/pangoft2.h>
25 #include <freetype/ftxf86.h>
32 #include "pango-font.hh"
33 #include "dimensions.hh"
34 #include "file-name.hh"
35 #include "international.hh"
36 #include "lookup.hh" // debugging
38 #include "string-convert.hh"
40 #include "all-font-metrics.hh"
41 #include "program-option.hh"
46 Pango_font::Pango_font (PangoFT2FontMap *fontmap,
47 PangoFontDescription const *description,
50 // This line looks stupid, but if we don't initialize physical_font_tab_ before
51 // we allocate memory in scm_c_make_hash_table, then that could trigger a garbage
53 physical_font_tab_ = SCM_EOL;
54 physical_font_tab_ = scm_c_make_hash_table (11);
55 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
56 context_ = pango_context_new ();
57 pango_context_set_font_map (context_, PANGO_FONT_MAP (fontmap));
59 pango_description_ = pango_font_description_copy (description);
60 attribute_list_ = pango_attr_list_new ();
62 // urgh. I don't understand this. Why isn't this 1/(scale *
63 // resolution * output_scale)
66 output_scale_ = output_scale;
68 / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
70 // ugh. Should make this configurable.
71 pango_context_set_language (context_, pango_language_from_string ("en_US"));
72 pango_context_set_base_dir (context_, pango_dir);
73 pango_context_set_font_description (context_, description);
76 Pango_font::~Pango_font ()
78 pango_font_description_free (pango_description_);
79 g_object_unref (context_);
80 pango_attr_list_unref (attribute_list_);
84 Pango_font::register_font_file (string filename,
88 scm_hash_set_x (physical_font_tab_,
89 ly_string2scm (ps_name),
90 scm_list_2 (ly_string2scm (filename),
91 scm_from_int (face_index)));
95 Pango_font::name_to_index (string nm) const
97 PangoFcFont *fcfont = PANGO_FC_FONT (pango_context_load_font (context_, pango_description_));
98 FT_Face face = pango_fc_font_lock_face (fcfont);
99 char *nm_str = (char *) nm.c_str ();
100 if (FT_UInt idx = FT_Get_Name_Index (face, nm_str))
102 pango_fc_font_unlock_face (fcfont);
106 pango_fc_font_unlock_face (fcfont);
111 Pango_font::derived_mark () const
113 scm_gc_mark (physical_font_tab_);
117 get_glyph_index_name (char *s,
120 sprintf (s, "glyphIndex%lX", code);
124 get_unicode_name (char *s,
128 sprintf (s, "u%lX", code);
130 sprintf (s, "uni%04lX", code);
134 Pango_font::get_unscaled_indexed_char_dimensions (size_t signed_idx) const
136 PangoFcFont *fcfont = PANGO_FC_FONT (pango_context_load_font (context_, pango_description_));
137 FT_Face face = pango_fc_font_lock_face (fcfont);
138 Box b = ly_FT_get_unscaled_indexed_char_dimensions (face, signed_idx);
139 pango_fc_font_unlock_face (fcfont);
144 Pango_font::get_scaled_indexed_char_dimensions (size_t signed_idx) const
146 PangoFont *font = pango_context_load_font (context_, pango_description_);
147 PangoRectangle logical_rect;
148 PangoRectangle ink_rect;
149 pango_font_get_glyph_extents (font, signed_idx, &ink_rect, &logical_rect);
150 Box out (Interval (PANGO_LBEARING (ink_rect),
151 PANGO_RBEARING (ink_rect)),
152 Interval (-PANGO_DESCENT (ink_rect),
153 PANGO_ASCENT (ink_rect)));
159 Pango_font::get_glyph_outline_bbox (size_t signed_idx) const
161 PangoFcFont *fcfont = PANGO_FC_FONT (pango_context_load_font (context_, pango_description_));
162 FT_Face face = pango_fc_font_lock_face (fcfont);
163 Box b = ly_FT_get_glyph_outline_bbox (face, signed_idx);
164 pango_fc_font_unlock_face (fcfont);
169 Pango_font::get_glyph_outline (size_t signed_idx) const
171 PangoFcFont *fcfont = PANGO_FC_FONT (pango_context_load_font (context_, pango_description_));
172 FT_Face face = pango_fc_font_lock_face (fcfont);
173 SCM s = ly_FT_get_glyph_outline (face, signed_idx);
174 pango_fc_font_unlock_face (fcfont);
179 Pango_font::pango_item_string_stencil (PangoGlyphItem const *glyph_item) const
181 const int GLYPH_NAME_LEN = 256;
182 char glyph_name[GLYPH_NAME_LEN];
184 PangoAnalysis const *pa = &(glyph_item->item->analysis);
185 PangoGlyphString *pgs = glyph_item->glyphs;
187 PangoRectangle logical_rect;
188 PangoRectangle ink_rect;
189 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
191 PangoFcFont *fcfont = PANGO_FC_FONT (pa->font);
192 FT_Face ftface = pango_fc_font_lock_face (fcfont);
194 Box b (Interval (PANGO_LBEARING (logical_rect),
195 PANGO_RBEARING (logical_rect)),
196 Interval (-PANGO_DESCENT (ink_rect),
197 PANGO_ASCENT (ink_rect)));
201 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
202 FcPattern *fcpat = fcfont->font_pattern;
204 FcChar8 *file_name_as_ptr = 0;
205 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
207 // due to a bug in FreeType 2.3.7 and earlier we can't use
208 // ftface->face_index; it is always zero for some font formats,
209 // in particular TTCs which we are interested in
211 FcPatternGetInteger (fcpat, FC_INDEX, 0, &face_index);
214 if (file_name_as_ptr)
215 // Normalize file name.
216 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
218 SCM glyph_exprs = SCM_EOL;
219 SCM *tail = &glyph_exprs;
221 Index_to_charcode_map const *cmap = 0;
222 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
223 if (!has_glyph_names)
224 cmap = all_fonts_global->get_index_to_charcode_map (file_name, face_index, ftface);
226 bool is_ttf = string (FT_Get_X11_Font_Format (ftface)) == "TrueType";
227 bool cid_keyed = false;
229 for (int i = 0; i < pgs->num_glyphs; i++)
231 PangoGlyphInfo *pgi = pgs->glyphs + i;
233 PangoGlyph pg = pgi->glyph;
234 PangoGlyphGeometry ggeo = pgi->geometry;
237 Zero-width characters are valid Unicode characters,
238 but glyph lookups need to be skipped.
240 if (!(pg ^ PANGO_GLYPH_EMPTY))
243 if (pg & PANGO_GLYPH_UNKNOWN_FLAG)
245 warning (_f ("no glyph for character U+%0X in font `%s'",
246 pg & ~PANGO_GLYPH_UNKNOWN_FLAG, file_name.c_str ()));
250 glyph_name[0] = '\0';
253 FT_Error errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
256 programming_error (_f ("FT_Get_Glyph_Name () error: %s",
257 freetype_error_string (errorcode).c_str ()));
260 SCM char_id = SCM_EOL;
261 if (glyph_name[0] == '\0'
264 && cmap->find (pg) != cmap->end ())
266 FT_ULong char_code = cmap->find (pg)->second;
267 get_unicode_name (glyph_name, char_code);
270 if (glyph_name[0] == '\0' && has_glyph_names)
272 programming_error (_f ("Glyph has no name, but font supports glyph naming.\n"
273 "Skipping glyph U+%0X, file %s",
274 pg, file_name.c_str ()));
278 if (glyph_name == string (".notdef") && is_ttf)
279 glyph_name[0] = '\0';
281 if (glyph_name[0] == '\0' && is_ttf)
282 // Access by glyph index directly.
283 get_glyph_index_name (glyph_name, pg);
285 if (glyph_name[0] == '\0')
289 char_id = scm_from_uint32 (pg);
292 char_id = scm_from_locale_string (glyph_name);
294 PangoRectangle logical_sub_rect;
295 PangoRectangle ink_sub_rect;
297 pango_glyph_string_extents_range (pgs, i, i + 1, pa->font, &ink_sub_rect, &logical_sub_rect);
298 Box b_sub (Interval (PANGO_LBEARING (logical_sub_rect),
299 PANGO_RBEARING (logical_sub_rect)),
300 Interval (-PANGO_DESCENT (ink_sub_rect),
301 PANGO_ASCENT (ink_sub_rect)));
303 b_sub.scale (scale_);
305 *tail = scm_cons (scm_list_5 (scm_from_double (b_sub[X_AXIS][RIGHT] - b_sub[X_AXIS][LEFT]),
306 scm_cons (scm_from_double (b_sub[Y_AXIS][DOWN]),
307 scm_from_double (b_sub[Y_AXIS][UP])),
308 scm_from_double (ggeo.x_offset * scale_),
309 scm_from_double (- ggeo.y_offset * scale_),
312 tail = SCM_CDRLOC (*tail);
314 pango_fc_font_unlock_face (fcfont);
315 pango_glyph_string_free (pgs);
317 PangoFontDescription *descr = pango_font_describe (pa->font);
318 Real size = pango_font_description_get_size (descr)
319 / (Real (PANGO_SCALE));
322 warning (_f ("no PostScript font name for font `%s'", file_name));
327 && (file_name.find (".otf") != NPOS
328 || file_name.find (".cff") != NPOS))
330 // UGH: kludge a PS name for OTF/CFF fonts.
331 string name = file_name;
332 ssize idx = file_name.find (".otf");
334 idx = file_name.find (".cff");
336 name = name.substr (0, idx);
338 ssize slash_idx = name.rfind ('/');
339 if (slash_idx != NPOS)
342 name = name.substr (slash_idx,
343 name.length () - slash_idx);
346 string initial = name.substr (0, 1);
347 initial = String_convert::to_upper (initial);
348 name = name.substr (1, name.length () - 1);
349 name = String_convert::to_lower (name);
350 ps_name = initial + name;
352 else if (ps_name_str0)
353 ps_name = ps_name_str0;
355 if (ps_name.length ())
357 ((Pango_font *) this)->register_font_file (file_name,
361 SCM expr = scm_list_n (ly_symbol2scm ("glyph-string"),
363 ly_string2scm (ps_name),
364 scm_from_double (size),
365 scm_from_bool (cid_keyed),
366 ly_quote_scm (glyph_exprs),
369 return Stencil (b, expr);
372 warning (_ ("FreeType face has no PostScript font name"));
377 Pango_font::physical_font_tab () const
379 return physical_font_tab_;
382 extern bool music_strings_to_paths;
385 Pango_font::text_stencil (Output_def * /* state */,
386 string str, bool music_string) const
389 The text assigned to a PangoLayout is automatically divided
390 into sections and reordered according to the Unicode
391 Bidirectional Algorithm, if necessary.
393 PangoLayout *layout = pango_layout_new (context_);
394 pango_layout_set_text (layout, str.c_str (), -1);
395 GSList *lines = pango_layout_get_lines (layout);
400 for (GSList *l = lines; l; l = l->next)
402 PangoLayoutLine *line = (PangoLayoutLine *) l->data;
403 GSList *layout_runs = line->runs;
405 for (GSList *p = layout_runs; p; p = p->next)
407 PangoGlyphItem *item = (PangoGlyphItem *) p->data;
408 Stencil item_stencil = pango_item_string_stencil (item);
410 item_stencil.translate_axis (last_x, X_AXIS);
411 last_x = item_stencil.extent (X_AXIS)[RIGHT];
413 #if 0 // Check extents.
414 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
416 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
419 Stencil dimless_frame (empty, frame.expr ());
420 dest.add_stencil (frame);
424 dest.add_stencil (item_stencil);
428 string name = get_output_backend_name ();
429 string output_mod = "scm output-" + name;
430 SCM mod = scm_c_resolve_module (output_mod.c_str ());
432 bool has_utf8_string = false;
434 if (ly_is_module (mod))
436 SCM utf8_string = ly_module_lookup (mod, ly_symbol2scm ("utf-8-string"));
438 has_utf8_string should only be true when utf8_string is a
439 variable that is bound to a *named* procedure, i.e. not a
442 if (utf8_string != SCM_BOOL_F
443 && scm_procedure_name (SCM_VARIABLE_REF (utf8_string)) != SCM_BOOL_F)
444 has_utf8_string = true;
447 bool to_paths = music_strings_to_paths;
450 Backends with the utf-8-string expression use it when
451 1) the -dmusic-strings-to-paths option is set
452 and `str' is not a music string, or
453 2) the -dmusic-strings-to-paths option is not set.
455 if (has_utf8_string && ((to_paths && !music_string) || !to_paths))
457 // For Pango based backends, we take a shortcut.
458 SCM exp = scm_list_3 (ly_symbol2scm ("utf-8-string"),
459 ly_string2scm (description_string ()),
460 ly_string2scm (str));
462 Box b (Interval (0, 0), Interval (0, 0));
463 b.unite (dest.extent_box ());
464 return Stencil (b, exp);
471 Pango_font::description_string () const
473 char *descr_string = pango_font_description_to_string (pango_description_);
474 string s (descr_string);
475 g_free (descr_string);
480 Pango_font::font_file_name () const
485 #endif // HAVE_PANGO_FT2