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?
11 #include <pango/pangoft2.h>
15 #include "dimensions.hh"
16 #include "pango-font.hh"
22 Pango_font::Pango_font (PangoFT2FontMap *fontmap,
24 PangoFontDescription *description,
27 physical_font_tab_ = scm_c_make_hash_table (11);
28 PangoDirection pango_dir = (dir == RIGHT)
30 : PANGO_DIRECTION_RTL;
32 = pango_ft2_get_context (PANGO_RESOLUTION, PANGO_RESOLUTION);
34 pango_description_ = pango_font_description_copy (description);
35 // context_ = pango_ft2_font_map_create_context (fontmap);
36 attribute_list_ = pango_attr_list_new ();
39 urgh. I don't understand this. Why isn't this 1/(scale *
40 resolution * output_scale)
44 scale_ = INCH_TO_BP / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
47 ugh. Should make this configurable.
49 pango_context_set_language (context_, pango_language_from_string ("en_US"));
50 pango_context_set_base_dir (context_, pango_dir);
51 pango_context_set_font_description (context_, description);
54 Pango_font::~Pango_font ()
56 pango_font_description_free (pango_description_);
57 g_object_unref (context_);
58 pango_attr_list_unref (attribute_list_);
62 Pango_font::register_font_file (String filename, String ps_name)
64 scm_hash_set_x (physical_font_tab_,
65 scm_makfrom0str (ps_name.to_str0 ()),
66 scm_makfrom0str (filename.to_str0 ()));
70 Pango_font::derived_mark () const
72 scm_gc_mark (physical_font_tab_);
76 Pango_font::pango_item_string_stencil (PangoItem *item, String str, Real dx) const
78 const int GLYPH_NAME_LEN = 256;
79 char glyph_name[GLYPH_NAME_LEN];
80 PangoAnalysis *pa = &(item->analysis);
81 PangoGlyphString *pgs = pango_glyph_string_new ();
83 pango_shape (str.to_str0 () + item->offset,
84 item->length, pa, pgs);
86 PangoRectangle logical_rect;
87 PangoRectangle ink_rect;
88 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
90 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
94 FT_Face ftface = pango_fc_font_lock_face (fcfont);
95 Box b (Interval (PANGO_LBEARING (ink_rect),
96 PANGO_RBEARING (ink_rect)),
97 Interval (-PANGO_DESCENT (ink_rect),
98 PANGO_ASCENT (ink_rect)));
102 SCM glyph_exprs = SCM_EOL;
103 SCM *tail = &glyph_exprs;
104 for (int i = 0; i < pgs->num_glyphs; i++)
106 PangoGlyphInfo *pgi = pgs->glyphs + i;
108 PangoGlyph pg = pgi->glyph;
109 PangoGlyphGeometry ggeo = pgi->geometry;
111 FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
112 *tail = scm_cons (scm_list_3 (scm_from_double (ggeo.x_offset * scale_ + dx),
113 scm_from_double (ggeo.y_offset * scale_),
114 scm_makfrom0str (glyph_name)),
117 tail = SCM_CDRLOC (*tail);
120 PangoFontDescription *descr = pango_font_describe (pa->font);
121 Real size = pango_font_description_get_size (descr)
122 / (Real (PANGO_SCALE));
124 FcPattern *fcpat = fcfont->font_pattern;
126 FcPatternGetString (fcpat, FC_FILE, 0, (FcChar8 **) & filename);
127 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
130 warning (_f ("No PS font name for font `%s'", filename));
135 && (String (filename).index (".otf") >= 0
136 || String (filename).index (".cff") >= 0))
140 UGH: kludge a PS name for OTF/CFF fonts.
144 String name = filename;
145 int idx = String (filename).index (".otf")
146 >? String (filename).index (".cff");
148 name = name.left_string (idx);
150 int slash_idx = name.index_last ('/'); // UGh. What's happens on windows?
152 name = name.right_string (name.length () - slash_idx - 1);
154 String initial = name.cut_string (0, 1);
156 name = name.nomid_string (0, 1);
158 ps_name = initial + name;
160 else if (ps_name_str0)
161 ps_name = ps_name_str0;
163 if (ps_name.length ())
165 ((Pango_font *) this)->register_font_file (filename, ps_name);
166 pango_fc_font_unlock_face (fcfont);
168 SCM expr = scm_list_4 (ly_symbol2scm ("glyph-string"),
169 scm_makfrom0str (ps_name.to_str0 ()),
170 scm_from_double (size),
171 ly_quote_scm (glyph_exprs));
173 return Stencil (b, expr);
177 warning (_ ("FreeType face has no PostScript font name."));
183 Pango_font::physical_font_tab () const
185 return physical_font_tab_;
189 Pango_font::text_stencil (String str) const
191 GList *items = pango_itemize (context_,
193 0, str.length (), attribute_list_,
201 PangoItem *item = (PangoItem *) ptr->data;
203 Stencil item_stencil = pango_item_string_stencil (item, str, x);
205 x = item_stencil.extent (X_AXIS)[RIGHT];
207 dest.add_stencil (item_stencil);
213 UGH. Should have flags per output format signifying supported
216 if (output_backend_global != "ps"
217 && output_backend_global != "eps")
220 For Pango based backends, we take a shortcut.
222 char *descr_string = pango_font_description_to_string (pango_description_);
224 = scm_list_3 (ly_symbol2scm ("utf8-string"),
225 scm_makfrom0str (descr_string),
226 scm_makfrom0str (str.to_str0 ()));
228 g_free (descr_string);
230 Box b (Interval (0, 0), Interval (0, 0));
231 b.unite (dest.extent_box ());
232 return Stencil (b, exp);
237 if (!dest.extent_box ()[X_AXIS].is_empty ())
239 Stencil frame = Lookup::frame (dest.extent_box (), 0.1, 0.1);
242 Stencil dimless_frame (empty, frame.expr ());
243 dest.add_stencil (frame);
251 Pango_font::font_file_name () const