2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2004--2009 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 #define PANGO_ENABLE_BACKEND // ugh, why necessary?
21 #include <pango/pangoft2.h>
22 #include <freetype/ftxf86.h>
29 #include "pango-font.hh"
30 #include "dimensions.hh"
31 #include "file-name.hh"
32 #include "international.hh"
33 #include "lookup.hh" // debugging
35 #include "string-convert.hh"
37 #include "all-font-metrics.hh"
38 #include "program-option.hh"
43 Pango_font::Pango_font (PangoFT2FontMap * /* fontmap */,
44 PangoFontDescription const *description,
47 physical_font_tab_ = scm_c_make_hash_table (11);
48 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
49 context_ = pango_ft2_get_context (PANGO_RESOLUTION,
52 pango_description_ = pango_font_description_copy (description);
53 attribute_list_ = pango_attr_list_new ();
55 // urgh. I don't understand this. Why isn't this 1/(scale *
56 // resolution * output_scale)
59 output_scale_ = output_scale;
61 / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
63 // ugh. Should make this configurable.
64 pango_context_set_language (context_, pango_language_from_string ("en_US"));
65 pango_context_set_base_dir (context_, pango_dir);
66 pango_context_set_font_description (context_, description);
69 Pango_font::~Pango_font ()
71 pango_font_description_free (pango_description_);
72 g_object_unref (context_);
73 pango_attr_list_unref (attribute_list_);
77 Pango_font::register_font_file (string filename,
81 scm_hash_set_x (physical_font_tab_,
82 ly_string2scm (ps_name),
83 scm_list_2 (ly_string2scm (filename),
84 scm_from_int (face_index)));
88 Pango_font::derived_mark () const
90 scm_gc_mark (physical_font_tab_);
94 get_glyph_index_name (char *s,
97 sprintf (s, "glyphIndex%lX", code);
101 get_unicode_name (char *s,
105 sprintf (s, "u%lX", code);
107 sprintf (s, "uni%04lX", code);
111 Pango_font::pango_item_string_stencil (PangoItem const *item,
113 bool tight_bbox) const
115 const int GLYPH_NAME_LEN = 256;
116 char glyph_name[GLYPH_NAME_LEN];
117 PangoAnalysis const *pa = &(item->analysis);
118 PangoGlyphString *pgs = pango_glyph_string_new ();
120 pango_shape (str.c_str () + item->offset,
121 item->length, (PangoAnalysis*) pa, pgs);
123 PangoRectangle logical_rect;
124 PangoRectangle ink_rect;
125 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
127 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
131 FT_Face ftface = pango_fc_font_lock_face (fcfont);
133 PangoRectangle const *which_rect = tight_bbox ? &ink_rect
136 Box b (Interval (PANGO_LBEARING (logical_rect),
137 PANGO_RBEARING (logical_rect)),
138 Interval (-PANGO_DESCENT (*which_rect),
139 PANGO_ASCENT (*which_rect)));
142 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
143 FcPattern *fcpat = fcfont->font_pattern;
145 FcChar8 *file_name_as_ptr = 0;
146 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
148 // due to a bug in FreeType 2.3.7 and earlier we can't use
149 // ftface->face_index; it is always zero for some font formats,
150 // in particular TTCs which we are interested in
152 FcPatternGetInteger (fcpat, FC_INDEX, 0, &face_index);
155 if (file_name_as_ptr)
156 // Normalize file name.
157 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
159 SCM glyph_exprs = SCM_EOL;
160 SCM *tail = &glyph_exprs;
162 Index_to_charcode_map const *cmap = 0;
163 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
164 if (!has_glyph_names)
165 cmap = all_fonts_global->get_index_to_charcode_map (
166 file_name, face_index, ftface);
168 bool is_ttf = string (FT_Get_X11_Font_Format (ftface)) == "TrueType";
169 bool cid_keyed = false;
171 for (int i = 0; i < pgs->num_glyphs; i++)
173 PangoGlyphInfo *pgi = pgs->glyphs + i;
175 PangoGlyph pg = pgi->glyph;
176 PangoGlyphGeometry ggeo = pgi->geometry;
178 glyph_name[0] = '\0';
181 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
185 _f ("FT_Get_Glyph_Name () error: %s",
186 freetype_error_string (errorcode).c_str ()));
189 SCM char_id = SCM_EOL;
190 if (glyph_name[0] == '\0'
193 && cmap->find (pg) != cmap->end ())
195 FT_ULong char_code = cmap->find (pg)->second;
196 get_unicode_name (glyph_name, char_code);
199 if (glyph_name[0] == '\0' && has_glyph_names)
202 _f ("Glyph has no name, but font supports glyph naming.\n"
203 "Skipping glyph U+%0X, file %s",
204 pg, file_name.c_str ()));
208 if (glyph_name == string (".notdef") && is_ttf)
209 glyph_name[0] = '\0';
211 if (glyph_name[0] == '\0' && is_ttf)
212 // Access by glyph index directly.
213 get_glyph_index_name (glyph_name, pg);
215 if (glyph_name[0] == '\0')
219 char_id = scm_from_uint32 (pg);
222 char_id = scm_from_locale_string (glyph_name);
224 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
225 scm_from_double (ggeo.x_offset * scale_),
226 scm_from_double (ggeo.y_offset * scale_),
229 tail = SCM_CDRLOC (*tail);
232 pango_glyph_string_free (pgs);
234 PangoFontDescription *descr = pango_font_describe (pa->font);
235 Real size = pango_font_description_get_size (descr)
236 / (Real (PANGO_SCALE));
239 warning (_f ("no PostScript font name for font `%s'", file_name));
244 && (file_name.find (".otf") != NPOS
245 || file_name.find (".cff") != NPOS))
247 // UGH: kludge a PS name for OTF/CFF fonts.
248 string name = file_name;
249 ssize idx = file_name.find (".otf");
251 idx = file_name.find (".cff");
253 name = name.substr (0, idx);
255 ssize slash_idx = name.rfind ('/');
256 if (slash_idx != NPOS)
259 name = name.substr (slash_idx,
260 name.length () - slash_idx);
263 string initial = name.substr (0, 1);
264 initial = String_convert::to_upper (initial);
265 name = name.substr (1, name.length () - 1);
266 name = String_convert::to_lower (name);
267 ps_name = initial + name;
269 else if (ps_name_str0)
270 ps_name = ps_name_str0;
272 if (ps_name.length ())
274 ((Pango_font *) this)->register_font_file (file_name,
277 pango_fc_font_unlock_face (fcfont);
279 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
280 ly_string2scm (ps_name),
281 scm_from_double (size),
282 scm_from_bool (cid_keyed),
283 ly_quote_scm (glyph_exprs));
285 return Stencil (b, expr);
288 warning (_ ("FreeType face has no PostScript font name"));
293 Pango_font::physical_font_tab () const
295 return physical_font_tab_;
299 Pango_font::word_stencil (string str, bool feta) const
301 return text_stencil (str, feta, true);
305 Pango_font::text_stencil (string str, bool feta) const
307 return text_stencil (str, feta, false);
311 Pango_font::text_stencil (string str,
316 = pango_itemize (context_,
318 0, str.length (), attribute_list_,
326 FIXME: The Unicode Bidirectional Algorithm needs to be
327 implemented here. Right now, a simplistic approach is taken:
328 a left-to-right ordering of each item in the GList.
330 for (GList *ptr = items; ptr; ptr = ptr->next)
332 PangoItem *item = (PangoItem *) ptr->data;
334 Stencil item_stencil = pango_item_string_stencil (item, str, tight);
336 item_stencil.translate_axis (last_x, X_AXIS);
337 last_x = item_stencil.extent (X_AXIS)[RIGHT];
339 #if 0 // Check extents.
340 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
342 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
345 Stencil dimless_frame (empty, frame.expr ());
346 dest.add_stencil (frame);
350 dest.add_stencil (item_stencil);
353 string name = get_output_backend_name ();
354 string output_mod = "scm output-" + name;
355 SCM mod = scm_c_resolve_module (output_mod.c_str ());
357 bool has_utf8_string = false;
359 if (ly_is_module (mod))
361 SCM utf8_string = ly_module_lookup (mod, ly_symbol2scm ("utf-8-string"));
363 has_utf8_string should only be true when utf8_string is a
364 variable that is bound to a *named* procedure.
366 if (utf8_string != SCM_BOOL_F
367 && scm_procedure_name (SCM_VARIABLE_REF (utf8_string)) != SCM_BOOL_F)
368 has_utf8_string = true;
372 The SVG backend only uses utf-8-string for the non-music
373 fonts, hence the check here. --pmccarty
375 TODO: use a program option (-dmusic-strings-to-paths) here
376 instead that is enabled only when -dbackend=svg.
378 if ((name == "svg" && !feta) || (name != "svg" && has_utf8_string))
380 // For Pango based backends, we take a shortcut.
381 SCM exp = scm_list_3 (ly_symbol2scm ("utf-8-string"),
382 ly_string2scm (description_string ()),
383 ly_string2scm (str));
385 Box b (Interval (0, 0), Interval (0, 0));
386 b.unite (dest.extent_box ());
387 return Stencil (b, exp);
396 Pango_font::description_string () const
398 char *descr_string = pango_font_description_to_string (pango_description_);
399 string s (descr_string);
400 g_free (descr_string);
405 Pango_font::font_file_name () const
410 #endif // HAVE_PANGO_FT2