2 pango-font.cc -- implement Pango_font
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #define PANGO_ENABLE_BACKEND // ugh, why necessary?
10 #include <pango/pangoft2.h>
13 #include "pango-font.hh"
15 #include "dimensions.hh"
16 #include "file-name.hh"
17 #include "international.hh"
20 #include "string-convert.hh"
26 Pango_font::Pango_font (PangoFT2FontMap *fontmap,
27 PangoFontDescription *description,
31 physical_font_tab_ = scm_c_make_hash_table (11);
32 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
34 = pango_ft2_get_context (PANGO_RESOLUTION, PANGO_RESOLUTION);
35 // context_ = pango_ft2_font_map_create_context (fontmap);
37 pango_description_ = pango_font_description_copy (description);
38 attribute_list_ = pango_attr_list_new ();
41 urgh. I don't understand this. Why isn't this 1/(scale *
42 resolution * output_scale)
46 output_scale_ = output_scale;
47 scale_ = INCH_TO_BP / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
50 ugh. Should make this configurable.
52 pango_context_set_language (context_, pango_language_from_string ("en_US"));
53 pango_context_set_base_dir (context_, pango_dir);
54 pango_context_set_font_description (context_, description);
57 Pango_font::~Pango_font ()
59 pango_font_description_free (pango_description_);
60 g_object_unref (context_);
61 pango_attr_list_unref (attribute_list_);
65 Pango_font::register_font_file (string filename, string ps_name)
67 scm_hash_set_x (physical_font_tab_,
68 scm_makfrom0str (ps_name.c_str ()),
69 scm_makfrom0str (filename.c_str ()));
73 Pango_font::derived_mark () const
75 scm_gc_mark (physical_font_tab_);
79 Index_to_charcode_map const *
80 Pango_font::get_index_to_charcode_map (string key, FT_Face face)
82 if (charcode_maps_.find (key) == charcode_maps_.end ())
83 charcode_maps_[key] = make_index_to_charcode_map (face);
85 if (charcode_maps_.find (key) == charcode_maps_.end ())
88 return &charcode_maps_[key];
92 get_unicode_name (char*s, FT_ULong code)
95 sprintf (s, "u%lX", code);
97 sprintf (s, "uni%04lX", code);
102 Pango_font::pango_item_string_stencil (PangoItem const *item, string str,
103 bool tight_bbox) const
105 const int GLYPH_NAME_LEN = 256;
106 char glyph_name[GLYPH_NAME_LEN];
107 PangoAnalysis const *pa = &(item->analysis);
108 PangoGlyphString *pgs = pango_glyph_string_new ();
110 pango_shape (str.c_str () + item->offset,
111 item->length, (PangoAnalysis*) pa, pgs);
113 PangoRectangle logical_rect;
114 PangoRectangle ink_rect;
115 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
117 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
121 FT_Face ftface = pango_fc_font_lock_face (fcfont);
123 PangoRectangle const *which_rect
128 Box b (Interval (PANGO_LBEARING (logical_rect),
129 PANGO_RBEARING (logical_rect)),
130 Interval (-PANGO_DESCENT (*which_rect),
131 PANGO_ASCENT (*which_rect)));
134 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
135 FcPattern *fcpat = fcfont->font_pattern;
136 FcChar8 *file_name_as_ptr = 0;
137 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
140 if (file_name_as_ptr)
142 /* Normalize file name. */
143 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
146 SCM glyph_exprs = SCM_EOL;
147 SCM *tail = &glyph_exprs;
149 Index_to_charcode_map const *cmap = 0;
150 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
151 if (! has_glyph_names)
152 cmap = ((Pango_font*)this)->get_index_to_charcode_map (file_name, ftface);
154 bool cid_keyed = false;
155 for (int i = 0; i < pgs->num_glyphs; i++)
157 PangoGlyphInfo *pgi = pgs->glyphs + i;
159 PangoGlyph pg = pgi->glyph;
160 PangoGlyphGeometry ggeo = pgi->geometry;
162 glyph_name[0] = '\0';
165 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
167 programming_error ("FT_Get_Glyph_Name returns error");
170 SCM char_id = SCM_EOL;
171 if (glyph_name[0] == '\0'
174 /* Ugh should ask FreeType about font type. */
175 && (file_name.find (".ttf") != NPOS
176 || file_name.find (".TTF") != NPOS)
177 && cmap->find (pg) != cmap->end ())
179 FT_ULong char_code = cmap->find (pg)->second;
180 get_unicode_name (glyph_name, char_code);
183 if (glyph_name[0] == '\0' && has_glyph_names)
185 programming_error (_f ("Glyph has no name, but font supports glyph naming.\n"
186 "Skipping glyph U+%0X, file %s",
188 file_name.c_str ()));
192 if (glyph_name[0] == '\0')
198 char_id = scm_from_uint32 (pg);
201 char_id = scm_makfrom0str (glyph_name);
203 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
204 scm_from_double (ggeo.x_offset * scale_),
205 scm_from_double (ggeo.y_offset * scale_),
209 tail = SCM_CDRLOC (*tail);
212 PangoFontDescription *descr = pango_font_describe (pa->font);
213 Real size = pango_font_description_get_size (descr)
214 / (Real (PANGO_SCALE));
218 warning (_f ("no PostScript font name for font `%s'", file_name));
223 && (file_name.find (".otf") != NPOS
224 || file_name.find (".cff") != NPOS))
227 /* UGH: kludge a PS name for OTF/CFF fonts. */
228 string name = file_name;
229 ssize idx = file_name.find (".otf");
231 idx = file_name.find (".cff");
233 name = name.substr (0, idx);
235 ssize slash_idx = name.rfind ('/');
236 if (slash_idx != NPOS)
239 name = name.substr (slash_idx,
240 name.length () - slash_idx);
243 string initial = name.substr (0, 1);
244 initial = String_convert::to_upper (initial);
245 name = name.substr (1, name.length () - 1);
246 name = String_convert::to_lower (name);
247 ps_name = initial + name;
249 else if (ps_name_str0)
250 ps_name = ps_name_str0;
252 if (ps_name.length ())
254 ((Pango_font *) this)->register_font_file (file_name, ps_name);
255 pango_fc_font_unlock_face (fcfont);
257 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
258 scm_makfrom0str (ps_name.c_str ()),
259 scm_from_double (size),
260 scm_from_bool (cid_keyed),
261 ly_quote_scm (glyph_exprs));
263 return Stencil (b, expr);
266 warning (_ ("FreeType face has no PostScript font name"));
271 Pango_font::physical_font_tab () const
273 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, bool tight) const
293 = pango_itemize (context_,
295 0, str.length (), attribute_list_,
302 Direction text_dir = RIGHT;
303 for (GList *p = items; p; p = p->next)
305 PangoItem *item = (PangoItem *) p->data;
306 if (item->analysis.level == PANGO_DIRECTION_RTL)
310 for (GList *ptr = items; ptr; ptr = ptr->next)
312 PangoItem *item = (PangoItem *) ptr->data;
314 Stencil item_stencil = pango_item_string_stencil (item, str, tight);
316 if (text_dir == RIGHT)
318 item_stencil.translate_axis (last_x, X_AXIS);
319 last_x = item_stencil.extent (X_AXIS)[RIGHT];
321 else if (text_dir == LEFT)
323 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
326 #if 0 /* Check extents. */
327 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
329 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
332 Stencil dimless_frame (empty, frame.expr ());
333 dest.add_stencil (frame);
337 dest.add_stencil (item_stencil);
341 UGH. Should have flags per output format signifying supported
344 if (output_backend_global != "ps"
345 && output_backend_global != "eps")
348 For Pango based backends, we take a shortcut.
351 = scm_list_3 (ly_symbol2scm ("utf-8-string"),
352 scm_makfrom0str (description_string ().c_str ()),
353 scm_makfrom0str (str.c_str ()));
355 Box b (Interval (0, 0), Interval (0, 0));
356 b.unite (dest.extent_box ());
357 return Stencil (b, exp);
365 Pango_font::description_string () const
367 char *descr_string = pango_font_description_to_string (pango_description_);
368 string s (descr_string);
369 g_free (descr_string);
375 Pango_font::font_file_name () const