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 Pango_font::pango_item_string_stencil (PangoItem const *item, string str) const
81 const int GLYPH_NAME_LEN = 256;
82 char glyph_name[GLYPH_NAME_LEN];
83 PangoAnalysis const *pa = &(item->analysis);
84 PangoGlyphString *pgs = pango_glyph_string_new ();
86 pango_shape (str.c_str () + item->offset,
87 item->length, (PangoAnalysis*) pa, pgs);
89 PangoRectangle logical_rect;
90 PangoRectangle ink_rect;
91 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
93 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
97 FT_Face ftface = pango_fc_font_lock_face (fcfont);
98 Box b (Interval (PANGO_LBEARING (ink_rect),
99 PANGO_RBEARING (ink_rect)),
100 Interval (-PANGO_DESCENT (ink_rect),
101 PANGO_ASCENT (ink_rect)));
105 SCM glyph_exprs = SCM_EOL;
106 SCM *tail = &glyph_exprs;
108 bool cid_keyed = false;
109 for (int i = 0; i < pgs->num_glyphs; i++)
111 PangoGlyphInfo *pgi = pgs->glyphs + i;
113 PangoGlyph pg = pgi->glyph;
114 PangoGlyphGeometry ggeo = pgi->geometry;
116 FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
119 if (glyph_name[0] == '\0')
125 char_id = scm_from_int (pg);
128 char_id = scm_makfrom0str (glyph_name);
130 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
131 scm_from_double (ggeo.x_offset * scale_),
132 scm_from_double (ggeo.y_offset * scale_),
136 tail = SCM_CDRLOC (*tail);
139 PangoFontDescription *descr = pango_font_describe (pa->font);
140 Real size = pango_font_description_get_size (descr)
141 / (Real (PANGO_SCALE));
143 FcPattern *fcpat = fcfont->font_pattern;
144 char *file_name_as_ptr = 0;
145 FcPatternGetString (fcpat, FC_FILE, 0, (FcChar8 **) & file_name_as_ptr);
148 if (file_name_as_ptr)
150 /* Normalize file name. */
151 file_name = File_name (file_name_as_ptr).to_string ();
154 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
157 warning (_f ("no PostScript font name for font `%s'", file_name));
162 && (file_name.find (".otf") != NPOS
163 || file_name.find (".cff") != NPOS))
166 /* UGH: kludge a PS name for OTF/CFF fonts. */
167 string name = file_name;
168 ssize idx = file_name.find (".otf");
170 idx = file_name.find (".cff");
172 name = name.substr (0, idx);
174 ssize slash_idx = name.rfind ('/');
175 if (slash_idx != NPOS)
178 name = name.substr (slash_idx,
179 name.length () - slash_idx);
182 string initial = name.substr (0, 1);
183 initial = String_convert::to_upper (initial);
184 name = name.substr (1, name.length () - 1);
185 name = String_convert::to_lower (name);
186 ps_name = initial + name;
188 else if (ps_name_str0)
189 ps_name = ps_name_str0;
191 if (ps_name.length ())
193 ((Pango_font *) this)->register_font_file (file_name, ps_name);
194 pango_fc_font_unlock_face (fcfont);
196 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
197 scm_makfrom0str (ps_name.c_str ()),
198 scm_from_double (size),
199 scm_from_bool (cid_keyed),
200 ly_quote_scm (glyph_exprs));
202 return Stencil (b, expr);
205 warning (_ ("FreeType face has no PostScript font name"));
210 Pango_font::physical_font_tab () const
212 return physical_font_tab_;
216 Pango_font::text_stencil (string str) const
219 = pango_itemize (context_,
221 0, str.length (), attribute_list_,
228 Direction text_dir = RIGHT;
229 for (GList *p = items; p; p = p->next)
231 PangoItem *item = (PangoItem *) p->data;
232 if (item->analysis.level == PANGO_DIRECTION_RTL)
236 for (GList *ptr = items; ptr; ptr = ptr->next)
238 PangoItem *item = (PangoItem *) ptr->data;
240 Stencil item_stencil = pango_item_string_stencil (item, str);
242 if (text_dir == RIGHT)
244 item_stencil.translate_axis (last_x, X_AXIS);
245 last_x = item_stencil.extent (X_AXIS)[RIGHT];
247 else if (text_dir == LEFT)
249 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
252 #if 0 /* Check extents. */
253 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
255 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
258 Stencil dimless_frame (empty, frame.expr ());
259 dest.add_stencil (frame);
263 dest.add_stencil (item_stencil);
267 UGH. Should have flags per output format signifying supported
270 if (output_backend_global != "ps"
271 && output_backend_global != "eps")
274 For Pango based backends, we take a shortcut.
276 char *descr_string = pango_font_description_to_string (pango_description_);
278 = scm_list_3 (ly_symbol2scm ("utf-8-string"),
279 scm_makfrom0str (descr_string),
280 scm_makfrom0str (str.c_str ()));
282 g_free (descr_string);
284 Box b (Interval (0, 0), Interval (0, 0));
285 b.unite (dest.extent_box ());
286 return Stencil (b, exp);
294 Pango_font::font_file_name () const