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) 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);
121 Box b (Interval (PANGO_LBEARING (ink_rect),
122 PANGO_RBEARING (ink_rect)),
123 Interval (-PANGO_DESCENT (ink_rect),
124 PANGO_ASCENT (ink_rect)));
127 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
128 FcPattern *fcpat = fcfont->font_pattern;
129 FcChar8 *file_name_as_ptr = 0;
130 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
133 if (file_name_as_ptr)
135 /* Normalize file name. */
136 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
139 SCM glyph_exprs = SCM_EOL;
140 SCM *tail = &glyph_exprs;
142 Index_to_charcode_map const *cmap = 0;
143 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
144 if (! has_glyph_names)
145 cmap = ((Pango_font*)this)->get_index_to_charcode_map (file_name, ftface);
147 bool cid_keyed = false;
148 for (int i = 0; i < pgs->num_glyphs; i++)
150 PangoGlyphInfo *pgi = pgs->glyphs + i;
152 PangoGlyph pg = pgi->glyph;
153 PangoGlyphGeometry ggeo = pgi->geometry;
155 glyph_name[0] = '\0';
158 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
160 programming_error ("FT_Get_Glyph_Name returns error");
163 SCM char_id = SCM_EOL;
164 if (glyph_name[0] == '\0'
167 /* Ugh should ask FreeType about font type. */
168 && (file_name.find (".ttf") != NPOS
169 || file_name.find (".TTF") != NPOS))
171 FT_ULong char_code = cmap->find (pg)->second;
172 get_unicode_name (glyph_name, char_code);
175 if (glyph_name[0] == '\0' && has_glyph_names)
177 programming_error ("Glyph has no name, but font supports glyph naming. Skipping glyph: "
178 + description_string ());
182 if (glyph_name[0] == '\0')
188 char_id = scm_from_uint32 (pg);
191 char_id = scm_makfrom0str (glyph_name);
193 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
194 scm_from_double (ggeo.x_offset * scale_),
195 scm_from_double (ggeo.y_offset * scale_),
199 tail = SCM_CDRLOC (*tail);
202 PangoFontDescription *descr = pango_font_describe (pa->font);
203 Real size = pango_font_description_get_size (descr)
204 / (Real (PANGO_SCALE));
208 warning (_f ("no PostScript font name for font `%s'", file_name));
213 && (file_name.find (".otf") != NPOS
214 || file_name.find (".cff") != NPOS))
217 /* UGH: kludge a PS name for OTF/CFF fonts. */
218 string name = file_name;
219 ssize idx = file_name.find (".otf");
221 idx = file_name.find (".cff");
223 name = name.substr (0, idx);
225 ssize slash_idx = name.rfind ('/');
226 if (slash_idx != NPOS)
229 name = name.substr (slash_idx,
230 name.length () - slash_idx);
233 string initial = name.substr (0, 1);
234 initial = String_convert::to_upper (initial);
235 name = name.substr (1, name.length () - 1);
236 name = String_convert::to_lower (name);
237 ps_name = initial + name;
239 else if (ps_name_str0)
240 ps_name = ps_name_str0;
242 if (ps_name.length ())
244 ((Pango_font *) this)->register_font_file (file_name, ps_name);
245 pango_fc_font_unlock_face (fcfont);
247 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
248 scm_makfrom0str (ps_name.c_str ()),
249 scm_from_double (size),
250 scm_from_bool (cid_keyed),
251 ly_quote_scm (glyph_exprs));
253 return Stencil (b, expr);
256 warning (_ ("FreeType face has no PostScript font name"));
261 Pango_font::physical_font_tab () const
263 return physical_font_tab_;
267 Pango_font::text_stencil (string str) const
270 = pango_itemize (context_,
272 0, str.length (), attribute_list_,
279 Direction text_dir = RIGHT;
280 for (GList *p = items; p; p = p->next)
282 PangoItem *item = (PangoItem *) p->data;
283 if (item->analysis.level == PANGO_DIRECTION_RTL)
287 for (GList *ptr = items; ptr; ptr = ptr->next)
289 PangoItem *item = (PangoItem *) ptr->data;
291 Stencil item_stencil = pango_item_string_stencil (item, str);
293 if (text_dir == RIGHT)
295 item_stencil.translate_axis (last_x, X_AXIS);
296 last_x = item_stencil.extent (X_AXIS)[RIGHT];
298 else if (text_dir == LEFT)
300 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
303 #if 0 /* Check extents. */
304 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
306 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
309 Stencil dimless_frame (empty, frame.expr ());
310 dest.add_stencil (frame);
314 dest.add_stencil (item_stencil);
318 UGH. Should have flags per output format signifying supported
321 if (output_backend_global != "ps"
322 && output_backend_global != "eps")
325 For Pango based backends, we take a shortcut.
328 = scm_list_3 (ly_symbol2scm ("utf-8-string"),
329 scm_makfrom0str (description_string ().c_str ()),
330 scm_makfrom0str (str.c_str ()));
332 Box b (Interval (0, 0), Interval (0, 0));
333 b.unite (dest.extent_box ());
334 return Stencil (b, exp);
342 Pango_font::description_string () const
344 char *descr_string = pango_font_description_to_string (pango_description_);
345 string s (descr_string);
346 g_free (descr_string);
352 Pango_font::font_file_name () const