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 (PangoGlyphItem const *glyph_item,
112 bool tight_bbox) const
114 const int GLYPH_NAME_LEN = 256;
115 char glyph_name[GLYPH_NAME_LEN];
117 PangoAnalysis const *pa = &(glyph_item->item->analysis);
118 PangoGlyphString *pgs = glyph_item->glyphs;
120 PangoRectangle logical_rect;
121 PangoRectangle ink_rect;
122 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
124 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
128 FT_Face ftface = pango_fc_font_lock_face (fcfont);
130 PangoRectangle const *which_rect = tight_bbox ? &ink_rect
133 Box b (Interval (PANGO_LBEARING (logical_rect),
134 PANGO_RBEARING (logical_rect)),
135 Interval (-PANGO_DESCENT (*which_rect),
136 PANGO_ASCENT (*which_rect)));
139 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
140 FcPattern *fcpat = fcfont->font_pattern;
142 FcChar8 *file_name_as_ptr = 0;
143 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
145 // due to a bug in FreeType 2.3.7 and earlier we can't use
146 // ftface->face_index; it is always zero for some font formats,
147 // in particular TTCs which we are interested in
149 FcPatternGetInteger (fcpat, FC_INDEX, 0, &face_index);
152 if (file_name_as_ptr)
153 // Normalize file name.
154 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
156 SCM glyph_exprs = SCM_EOL;
157 SCM *tail = &glyph_exprs;
159 Index_to_charcode_map const *cmap = 0;
160 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
161 if (!has_glyph_names)
162 cmap = all_fonts_global->get_index_to_charcode_map (
163 file_name, face_index, ftface);
165 bool is_ttf = string (FT_Get_X11_Font_Format (ftface)) == "TrueType";
166 bool cid_keyed = false;
168 for (int i = 0; i < pgs->num_glyphs; i++)
170 PangoGlyphInfo *pgi = pgs->glyphs + i;
172 PangoGlyph pg = pgi->glyph;
173 PangoGlyphGeometry ggeo = pgi->geometry;
176 Zero-width characters are valid Unicode characters,
177 but glyph lookups need to be skipped.
179 if (!(pg ^ PANGO_GLYPH_EMPTY))
182 glyph_name[0] = '\0';
185 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
189 _f ("FT_Get_Glyph_Name () error: %s",
190 freetype_error_string (errorcode).c_str ()));
193 SCM char_id = SCM_EOL;
194 if (glyph_name[0] == '\0'
197 && cmap->find (pg) != cmap->end ())
199 FT_ULong char_code = cmap->find (pg)->second;
200 get_unicode_name (glyph_name, char_code);
203 if (glyph_name[0] == '\0' && has_glyph_names)
206 _f ("Glyph has no name, but font supports glyph naming.\n"
207 "Skipping glyph U+%0X, file %s",
208 pg, file_name.c_str ()));
212 if (glyph_name == string (".notdef") && is_ttf)
213 glyph_name[0] = '\0';
215 if (glyph_name[0] == '\0' && is_ttf)
216 // Access by glyph index directly.
217 get_glyph_index_name (glyph_name, pg);
219 if (glyph_name[0] == '\0')
223 char_id = scm_from_uint32 (pg);
226 char_id = scm_from_locale_string (glyph_name);
228 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
229 scm_from_double (ggeo.x_offset * scale_),
230 scm_from_double (ggeo.y_offset * scale_),
233 tail = SCM_CDRLOC (*tail);
236 pango_glyph_string_free (pgs);
238 PangoFontDescription *descr = pango_font_describe (pa->font);
239 Real size = pango_font_description_get_size (descr)
240 / (Real (PANGO_SCALE));
243 warning (_f ("no PostScript font name for font `%s'", file_name));
248 && (file_name.find (".otf") != NPOS
249 || file_name.find (".cff") != NPOS))
251 // UGH: kludge a PS name for OTF/CFF fonts.
252 string name = file_name;
253 ssize idx = file_name.find (".otf");
255 idx = file_name.find (".cff");
257 name = name.substr (0, idx);
259 ssize slash_idx = name.rfind ('/');
260 if (slash_idx != NPOS)
263 name = name.substr (slash_idx,
264 name.length () - slash_idx);
267 string initial = name.substr (0, 1);
268 initial = String_convert::to_upper (initial);
269 name = name.substr (1, name.length () - 1);
270 name = String_convert::to_lower (name);
271 ps_name = initial + name;
273 else if (ps_name_str0)
274 ps_name = ps_name_str0;
276 if (ps_name.length ())
278 ((Pango_font *) this)->register_font_file (file_name,
281 pango_fc_font_unlock_face (fcfont);
283 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
284 ly_string2scm (ps_name),
285 scm_from_double (size),
286 scm_from_bool (cid_keyed),
287 ly_quote_scm (glyph_exprs));
289 return Stencil (b, expr);
292 warning (_ ("FreeType face has no PostScript font name"));
297 Pango_font::physical_font_tab () const
299 return physical_font_tab_;
303 Pango_font::word_stencil (string str, bool feta) const
305 return text_stencil (str, feta, true);
309 Pango_font::text_stencil (string str, bool feta) const
311 return text_stencil (str, feta, false);
315 Pango_font::text_stencil (string str,
320 The text assigned to a PangoLayout is automatically divided
321 into sections and reordered according to the Unicode
322 Bidirectional Algorithm, if necessary.
324 PangoLayout *layout = pango_layout_new (context_);
325 pango_layout_set_text (layout, str.c_str (), -1);
326 GSList *lines = pango_layout_get_lines (layout);
331 for (GSList *l = lines; l; l = l->next)
333 PangoLayoutLine *line = (PangoLayoutLine *) l->data;
334 GSList *layout_runs = line->runs;
336 for (GSList *p = layout_runs; p; p = p->next)
338 PangoGlyphItem *item = (PangoGlyphItem *) p->data;
339 Stencil item_stencil = pango_item_string_stencil (item, tight);
341 item_stencil.translate_axis (last_x, X_AXIS);
342 last_x = item_stencil.extent (X_AXIS)[RIGHT];
344 #if 0 // Check extents.
345 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
347 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
350 Stencil dimless_frame (empty, frame.expr ());
351 dest.add_stencil (frame);
355 dest.add_stencil (item_stencil);
359 string name = get_output_backend_name ();
360 string output_mod = "scm output-" + name;
361 SCM mod = scm_c_resolve_module (output_mod.c_str ());
363 bool has_utf8_string = false;
365 if (ly_is_module (mod))
367 SCM utf8_string = ly_module_lookup (mod, ly_symbol2scm ("utf-8-string"));
369 has_utf8_string should only be true when utf8_string is a
370 variable that is bound to a *named* procedure.
372 if (utf8_string != SCM_BOOL_F
373 && scm_procedure_name (SCM_VARIABLE_REF (utf8_string)) != SCM_BOOL_F)
374 has_utf8_string = true;
378 The SVG backend only uses utf-8-string for the non-music
379 fonts, hence the check here. --pmccarty
381 TODO: use a program option (-dmusic-strings-to-paths) here
382 instead that is enabled only when -dbackend=svg.
384 if ((name == "svg" && !feta) || (name != "svg" && has_utf8_string))
386 // For Pango based backends, we take a shortcut.
387 SCM exp = scm_list_3 (ly_symbol2scm ("utf-8-string"),
388 ly_string2scm (description_string ()),
389 ly_string2scm (str));
391 Box b (Interval (0, 0), Interval (0, 0));
392 b.unite (dest.extent_box ());
393 return Stencil (b, exp);
400 Pango_font::description_string () const
402 char *descr_string = pango_font_description_to_string (pango_description_);
403 string s (descr_string);
404 g_free (descr_string);
409 Pango_font::font_file_name () const
414 #endif // HAVE_PANGO_FT2