2 pango-font.cc -- implement Pango_font
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2005 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"
24 Pango_font::Pango_font (PangoFT2FontMap *fontmap,
26 PangoFontDescription *description,
30 physical_font_tab_ = scm_c_make_hash_table (11);
31 PangoDirection pango_dir = (dir == RIGHT)
33 : PANGO_DIRECTION_RTL;
35 = pango_ft2_get_context (PANGO_RESOLUTION, PANGO_RESOLUTION);
36 // context_ = pango_ft2_font_map_create_context (fontmap);
38 pango_description_ = pango_font_description_copy (description);
39 attribute_list_ = pango_attr_list_new ();
42 urgh. I don't understand this. Why isn't this 1/(scale *
43 resolution * 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.to_str0 ()),
69 scm_makfrom0str (filename.to_str0 ()));
73 Pango_font::derived_mark () const
75 scm_gc_mark (physical_font_tab_);
79 Pango_font::pango_item_string_stencil (PangoItem *item, String str, Real dx) const
81 const int GLYPH_NAME_LEN = 256;
82 char glyph_name[GLYPH_NAME_LEN];
83 PangoAnalysis *pa = &(item->analysis);
84 PangoGlyphString *pgs = pango_glyph_string_new ();
86 pango_shape (str.to_str0 () + item->offset,
87 item->length, 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;
107 for (int i = 0; i < pgs->num_glyphs; i++)
109 PangoGlyphInfo *pgi = pgs->glyphs + i;
111 PangoGlyph pg = pgi->glyph;
112 PangoGlyphGeometry ggeo = pgi->geometry;
114 FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
118 if (glyph_name[0] == '\0')
123 char_id = scm_from_int (pg);
126 char_id = scm_makfrom0str (glyph_name);
127 *tail = scm_cons (scm_list_3 (scm_from_double (ggeo.x_offset * scale_
129 scm_from_double (ggeo.y_offset * scale_),
133 tail = SCM_CDRLOC (*tail);
136 PangoFontDescription *descr = pango_font_describe (pa->font);
137 Real size = pango_font_description_get_size (descr)
138 / (Real (PANGO_SCALE));
140 FcPattern *fcpat = fcfont->font_pattern;
142 FcPatternGetString (fcpat, FC_FILE, 0, (FcChar8 **) & file_name);
144 /* Normalize file name. */
145 // FIXME: memleak(s?), drop the #ifdef?
146 file_name = File_name (file_name).to_string ().get_copy_str0 ();
149 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
152 warning (_f ("no PostScript font name for font `%s'", file_name));
157 && (String (file_name).index (".otf") >= 0
158 || String (file_name).index (".cff") >= 0))
161 /* UGH: kludge a PS name for OTF/CFF fonts. */
162 String name = file_name;
163 int idx = max (String (file_name).index (".otf"),
164 String (file_name).index (".cff"));
166 name = name.left_string (idx);
168 int slash_idx = name.index_last ('/');
170 name = name.right_string (name.length () - slash_idx - 1);
172 String initial = name.cut_string (0, 1);
174 name = name.nomid_string (0, 1);
176 ps_name = initial + name;
178 else if (ps_name_str0)
179 ps_name = ps_name_str0;
181 if (ps_name.length ())
183 ((Pango_font *) this)->register_font_file (file_name, ps_name);
184 pango_fc_font_unlock_face (fcfont);
186 SCM expr = scm_list_4 (ly_symbol2scm ("glyph-string"),
187 scm_makfrom0str (ps_name.to_str0 ()),
188 scm_from_double (size),
189 ly_quote_scm (glyph_exprs));
191 return Stencil (b, expr);
194 warning (_ ("FreeType face has no PostScript font name"));
199 Pango_font::physical_font_tab () const
201 return physical_font_tab_;
205 Pango_font::text_stencil (String str) const
207 GList *items = pango_itemize (context_,
209 0, str.length (), attribute_list_,
217 PangoItem *item = (PangoItem *) ptr->data;
219 Stencil item_stencil = pango_item_string_stencil (item, str, x);
221 x = item_stencil.extent (X_AXIS)[RIGHT];
223 dest.add_stencil (item_stencil);
229 UGH. Should have flags per output format signifying supported
232 if (output_backend_global != "ps"
233 && output_backend_global != "eps")
236 For Pango based backends, we take a shortcut.
238 char *descr_string = pango_font_description_to_string (pango_description_);
240 = scm_list_3 (ly_symbol2scm ("utf8-string"),
241 scm_makfrom0str (descr_string),
242 scm_makfrom0str (str.to_str0 ()));
244 g_free (descr_string);
246 Box b (Interval (0, 0), Interval (0, 0));
247 b.unite (dest.extent_box ());
248 return Stencil (b, exp);
253 if (!dest.extent_box ()[X_AXIS].is_empty ())
255 Stencil frame = Lookup::frame (dest.extent_box (), 0.1, 0.1);
258 Stencil dimless_frame (empty, frame.expr ());
259 dest.add_stencil (frame);
267 Pango_font::font_file_name () const