2 pango-font.cc -- implement Pango_font
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #define PANGO_ENABLE_BACKEND // ugh, why necessary?
10 #include <pango/pangoft2.h>
11 #include <freetype/ftxf86.h>
18 #include "pango-font.hh"
19 #include "dimensions.hh"
20 #include "file-name.hh"
21 #include "international.hh"
22 #include "lookup.hh" // debugging
24 #include "string-convert.hh"
26 #include "all-font-metrics.hh"
27 #include "program-option.hh"
32 Pango_font::Pango_font (PangoFT2FontMap * /* fontmap */,
33 PangoFontDescription const *description,
36 physical_font_tab_ = scm_c_make_hash_table (11);
37 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
38 context_ = pango_ft2_get_context (PANGO_RESOLUTION,
41 pango_description_ = pango_font_description_copy (description);
42 attribute_list_ = pango_attr_list_new ();
44 // urgh. I don't understand this. Why isn't this 1/(scale *
45 // resolution * output_scale)
48 output_scale_ = output_scale;
50 / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
52 // ugh. Should make this configurable.
53 pango_context_set_language (context_, pango_language_from_string ("en_US"));
54 pango_context_set_base_dir (context_, pango_dir);
55 pango_context_set_font_description (context_, description);
58 Pango_font::~Pango_font ()
60 pango_font_description_free (pango_description_);
61 g_object_unref (context_);
62 pango_attr_list_unref (attribute_list_);
66 Pango_font::register_font_file (string filename,
70 scm_hash_set_x (physical_font_tab_,
71 ly_string2scm (ps_name),
72 scm_list_2 (ly_string2scm (filename),
73 scm_from_int (face_index)));
77 Pango_font::derived_mark () const
79 scm_gc_mark (physical_font_tab_);
83 get_glyph_index_name (char *s,
86 sprintf (s, "glyphIndex%lX", code);
90 get_unicode_name (char *s,
94 sprintf (s, "u%lX", code);
96 sprintf (s, "uni%04lX", code);
100 Pango_font::pango_item_string_stencil (PangoItem const *item,
102 bool tight_bbox) const
104 const int GLYPH_NAME_LEN = 256;
105 char glyph_name[GLYPH_NAME_LEN];
106 PangoAnalysis const *pa = &(item->analysis);
107 PangoGlyphString *pgs = pango_glyph_string_new ();
109 pango_shape (str.c_str () + item->offset,
110 item->length, (PangoAnalysis*) pa, pgs);
112 PangoRectangle logical_rect;
113 PangoRectangle ink_rect;
114 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
116 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
120 FT_Face ftface = pango_fc_font_lock_face (fcfont);
122 PangoRectangle const *which_rect = tight_bbox ? &ink_rect
125 Box b (Interval (PANGO_LBEARING (logical_rect),
126 PANGO_RBEARING (logical_rect)),
127 Interval (-PANGO_DESCENT (*which_rect),
128 PANGO_ASCENT (*which_rect)));
131 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
132 FcPattern *fcpat = fcfont->font_pattern;
134 FcChar8 *file_name_as_ptr = 0;
135 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
137 // due to a bug in FreeType 2.3.7 and earlier we can't use
138 // ftface->face_index; it is always zero for some font formats,
139 // in particular TTCs which we are interested in
141 FcPatternGetInteger (fcpat, FC_INDEX, 0, &face_index);
144 if (file_name_as_ptr)
145 // Normalize file name.
146 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
148 SCM glyph_exprs = SCM_EOL;
149 SCM *tail = &glyph_exprs;
151 Index_to_charcode_map const *cmap = 0;
152 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
153 if (!has_glyph_names)
154 cmap = all_fonts_global->get_index_to_charcode_map (
155 file_name, face_index, ftface);
157 bool is_ttf = string (FT_Get_X11_Font_Format (ftface)) == "TrueType";
158 bool cid_keyed = false;
160 for (int i = 0; i < pgs->num_glyphs; i++)
162 PangoGlyphInfo *pgi = pgs->glyphs + i;
164 PangoGlyph pg = pgi->glyph;
165 PangoGlyphGeometry ggeo = pgi->geometry;
167 glyph_name[0] = '\0';
170 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
174 _f ("FT_Get_Glyph_Name () error: %s",
175 freetype_error_string (errorcode).c_str ()));
178 SCM char_id = SCM_EOL;
179 if (glyph_name[0] == '\0'
182 && cmap->find (pg) != cmap->end ())
184 FT_ULong char_code = cmap->find (pg)->second;
185 get_unicode_name (glyph_name, char_code);
188 if (glyph_name[0] == '\0' && has_glyph_names)
191 _f ("Glyph has no name, but font supports glyph naming.\n"
192 "Skipping glyph U+%0X, file %s",
193 pg, file_name.c_str ()));
197 if (glyph_name == string (".notdef") && is_ttf)
198 glyph_name[0] = '\0';
200 if (glyph_name[0] == '\0' && is_ttf)
201 // Access by glyph index directly.
202 get_glyph_index_name (glyph_name, pg);
204 if (glyph_name[0] == '\0')
208 char_id = scm_from_uint32 (pg);
211 char_id = scm_from_locale_string (glyph_name);
213 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
214 scm_from_double (ggeo.x_offset * scale_),
215 scm_from_double (ggeo.y_offset * scale_),
218 tail = SCM_CDRLOC (*tail);
221 pango_glyph_string_free (pgs);
223 PangoFontDescription *descr = pango_font_describe (pa->font);
224 Real size = pango_font_description_get_size (descr)
225 / (Real (PANGO_SCALE));
228 warning (_f ("no PostScript font name for font `%s'", file_name));
233 && (file_name.find (".otf") != NPOS
234 || file_name.find (".cff") != NPOS))
236 // UGH: kludge a PS name for OTF/CFF fonts.
237 string name = file_name;
238 ssize idx = file_name.find (".otf");
240 idx = file_name.find (".cff");
242 name = name.substr (0, idx);
244 ssize slash_idx = name.rfind ('/');
245 if (slash_idx != NPOS)
248 name = name.substr (slash_idx,
249 name.length () - slash_idx);
252 string initial = name.substr (0, 1);
253 initial = String_convert::to_upper (initial);
254 name = name.substr (1, name.length () - 1);
255 name = String_convert::to_lower (name);
256 ps_name = initial + name;
258 else if (ps_name_str0)
259 ps_name = ps_name_str0;
261 if (ps_name.length ())
263 ((Pango_font *) this)->register_font_file (file_name,
266 pango_fc_font_unlock_face (fcfont);
268 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
269 ly_string2scm (ps_name),
270 scm_from_double (size),
271 scm_from_bool (cid_keyed),
272 ly_quote_scm (glyph_exprs));
274 return Stencil (b, expr);
277 warning (_ ("FreeType face has no PostScript font name"));
282 Pango_font::physical_font_tab () const
284 return physical_font_tab_;
288 Pango_font::word_stencil (string str) const
290 return text_stencil (str, true);
294 Pango_font::text_stencil (string str) const
296 return text_stencil (str, false);
300 Pango_font::text_stencil (string str,
304 = pango_itemize (context_,
306 0, str.length (), attribute_list_,
313 Direction text_dir = RIGHT;
314 for (GList *p = items; p; p = p->next)
316 PangoItem *item = (PangoItem *) p->data;
317 if (item->analysis.level == PANGO_DIRECTION_RTL)
321 for (GList *ptr = items; ptr; ptr = ptr->next)
323 PangoItem *item = (PangoItem *) ptr->data;
325 Stencil item_stencil = pango_item_string_stencil (item, str, tight);
327 if (text_dir == RIGHT)
329 item_stencil.translate_axis (last_x, X_AXIS);
330 last_x = item_stencil.extent (X_AXIS)[RIGHT];
332 else if (text_dir == LEFT)
333 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
335 #if 0 // Check extents.
336 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
338 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
341 Stencil dimless_frame (empty, frame.expr ());
342 dest.add_stencil (frame);
346 dest.add_stencil (item_stencil);
349 // UGH. Should have flags per output format signifying supported
351 string name = get_output_backend_name ();
352 if (name != "ps" && name != "eps")
354 // For Pango based backends, we take a shortcut.
355 SCM exp = scm_list_3 (ly_symbol2scm ("utf-8-string"),
356 ly_string2scm (description_string ()),
357 ly_string2scm (str));
359 Box b (Interval (0, 0), Interval (0, 0));
360 b.unite (dest.extent_box ());
361 return Stencil (b, exp);
370 Pango_font::description_string () const
372 char *descr_string = pango_font_description_to_string (pango_description_);
373 string s (descr_string);
374 g_free (descr_string);
379 Pango_font::font_file_name () const
384 #endif // HAVE_PANGO_FT2