2 pango-font.cc -- implement Pango_font
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2008 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,
38 physical_font_tab_ = scm_c_make_hash_table (11);
39 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
40 context_ = pango_ft2_get_context (PANGO_RESOLUTION,
43 pango_description_ = pango_font_description_copy (description);
44 attribute_list_ = pango_attr_list_new ();
46 // urgh. I don't understand this. Why isn't this 1/(scale *
47 // resolution * output_scale)
50 output_scale_ = output_scale;
52 / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
54 // ugh. Should make this configurable.
55 pango_context_set_language (context_, pango_language_from_string ("en_US"));
56 pango_context_set_base_dir (context_, pango_dir);
57 pango_context_set_font_description (context_, description);
60 Pango_font::~Pango_font ()
62 pango_font_description_free (pango_description_);
63 g_object_unref (context_);
64 pango_attr_list_unref (attribute_list_);
68 Pango_font::register_font_file (string filename,
71 scm_hash_set_x (physical_font_tab_,
72 ly_string2scm (ps_name),
73 ly_string2scm (filename));
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;
133 FcChar8 *file_name_as_ptr = 0;
134 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
137 if (file_name_as_ptr)
138 // Normalize file name.
139 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
141 SCM glyph_exprs = SCM_EOL;
142 SCM *tail = &glyph_exprs;
144 Index_to_charcode_map const *cmap = 0;
145 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
146 if (!has_glyph_names)
147 cmap = all_fonts_global->get_index_to_charcode_map (file_name, ftface);
149 bool is_ttf = string (FT_Get_X11_Font_Format (ftface)) == "TrueType";
150 bool cid_keyed = false;
151 for (int i = 0; i < pgs->num_glyphs; i++)
153 PangoGlyphInfo *pgi = pgs->glyphs + i;
155 PangoGlyph pg = pgi->glyph;
156 PangoGlyphGeometry ggeo = pgi->geometry;
158 glyph_name[0] = '\0';
161 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
165 _f ("FT_Get_Glyph_Name () error: %s",
166 freetype_error_string (errorcode).c_str ()));
169 SCM char_id = SCM_EOL;
170 if (glyph_name[0] == '\0'
173 && cmap->find (pg) != cmap->end ())
175 FT_ULong char_code = cmap->find (pg)->second;
176 get_unicode_name (glyph_name, char_code);
179 if (glyph_name[0] == '\0' && has_glyph_names)
182 _f ("Glyph has no name, but font supports glyph naming.\n"
183 "Skipping glyph U+%0X, file %s",
184 pg, file_name.c_str ()));
188 if (glyph_name == string (".notdef") && is_ttf)
189 glyph_name[0] = '\0';
191 if (glyph_name[0] == '\0' && is_ttf)
192 // Access by glyph index directly.
193 get_glyph_index_name (glyph_name, pg);
195 if (glyph_name[0] == '\0')
200 char_id = scm_from_uint32 (pg);
203 char_id = scm_from_locale_string (glyph_name);
205 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
206 scm_from_double (ggeo.x_offset * scale_),
207 scm_from_double (ggeo.y_offset * scale_),
210 tail = SCM_CDRLOC (*tail);
213 pango_glyph_string_free (pgs);
215 PangoFontDescription *descr = pango_font_describe (pa->font);
216 Real size = pango_font_description_get_size (descr)
217 / (Real (PANGO_SCALE));
220 warning (_f ("no PostScript font name for font `%s'", file_name));
225 && (file_name.find (".otf") != NPOS
226 || file_name.find (".cff") != NPOS))
228 // UGH: kludge a PS name for OTF/CFF fonts.
229 string name = file_name;
230 ssize idx = file_name.find (".otf");
232 idx = file_name.find (".cff");
234 name = name.substr (0, idx);
236 ssize slash_idx = name.rfind ('/');
237 if (slash_idx != NPOS)
240 name = name.substr (slash_idx,
241 name.length () - slash_idx);
244 string initial = name.substr (0, 1);
245 initial = String_convert::to_upper (initial);
246 name = name.substr (1, name.length () - 1);
247 name = String_convert::to_lower (name);
248 ps_name = initial + name;
250 else if (ps_name_str0)
251 ps_name = ps_name_str0;
253 if (ps_name.length ())
255 ((Pango_font *) this)->register_font_file (file_name, ps_name);
256 pango_fc_font_unlock_face (fcfont);
258 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
259 ly_string2scm (ps_name),
260 scm_from_double (size),
261 scm_from_bool (cid_keyed),
262 ly_quote_scm (glyph_exprs));
264 return Stencil (b, expr);
267 warning (_ ("FreeType face has no PostScript font name"));
272 Pango_font::physical_font_tab () const
274 return physical_font_tab_;
278 Pango_font::word_stencil (string str) const
280 return text_stencil (str, true);
284 Pango_font::text_stencil (string str) const
286 return text_stencil (str, false);
290 Pango_font::text_stencil (string str,
294 = pango_itemize (context_,
296 0, str.length (), attribute_list_,
303 Direction text_dir = RIGHT;
304 for (GList *p = items; p; p = p->next)
306 PangoItem *item = (PangoItem *) p->data;
307 if (item->analysis.level == PANGO_DIRECTION_RTL)
311 for (GList *ptr = items; ptr; ptr = ptr->next)
313 PangoItem *item = (PangoItem *) ptr->data;
315 Stencil item_stencil = pango_item_string_stencil (item, str, tight);
317 if (text_dir == RIGHT)
319 item_stencil.translate_axis (last_x, X_AXIS);
320 last_x = item_stencil.extent (X_AXIS)[RIGHT];
322 else if (text_dir == LEFT)
323 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
325 #if 0 // Check extents.
326 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
328 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
331 Stencil dimless_frame (empty, frame.expr ());
332 dest.add_stencil (frame);
336 dest.add_stencil (item_stencil);
339 // UGH. Should have flags per output format signifying supported
341 string name = get_output_backend_name ();
342 if (name != "ps" && name != "eps")
344 // For Pango based backends, we take a shortcut.
345 SCM exp = scm_list_3 (ly_symbol2scm ("utf-8-string"),
346 ly_string2scm (description_string ()),
347 ly_string2scm (str));
349 Box b (Interval (0, 0), Interval (0, 0));
350 b.unite (dest.extent_box ());
351 return Stencil (b, exp);
360 Pango_font::description_string () const
362 char *descr_string = pango_font_description_to_string (pango_description_);
363 string s (descr_string);
364 g_free (descr_string);
369 Pango_font::font_file_name () const
374 #endif // HAVE_PANGO_FT2