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,
28 physical_font_tab_ = scm_c_make_hash_table (11);
29 PangoDirection pango_dir = (dir == RIGHT)
31 : PANGO_DIRECTION_RTL;
33 = pango_ft2_get_context (PANGO_RESOLUTION, PANGO_RESOLUTION);
34 // context_ = pango_ft2_font_map_create_context (fontmap);
36 pango_description_ = pango_font_description_copy (description);
37 attribute_list_ = pango_attr_list_new ();
40 urgh. I don't understand this. Why isn't this 1/(scale *
41 resolution * output_scale)
45 scale_ = INCH_TO_BP / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
48 ugh. Should make this configurable.
50 pango_context_set_language (context_, pango_language_from_string ("en_US"));
51 pango_context_set_base_dir (context_, pango_dir);
52 pango_context_set_font_description (context_, description);
55 Pango_font::~Pango_font ()
57 pango_font_description_free (pango_description_);
58 g_object_unref (context_);
59 pango_attr_list_unref (attribute_list_);
63 Pango_font::register_font_file (String filename, String ps_name)
65 scm_hash_set_x (physical_font_tab_,
66 scm_makfrom0str (ps_name.to_str0 ()),
67 scm_makfrom0str (filename.to_str0 ()));
71 Pango_font::derived_mark () const
73 scm_gc_mark (physical_font_tab_);
77 Pango_font::pango_item_string_stencil (PangoItem *item, String str, Real dx) const
79 const int GLYPH_NAME_LEN = 256;
80 char glyph_name[GLYPH_NAME_LEN];
81 PangoAnalysis *pa = &(item->analysis);
82 PangoGlyphString *pgs = pango_glyph_string_new ();
84 pango_shape (str.to_str0 () + item->offset,
85 item->length, pa, pgs);
87 PangoRectangle logical_rect;
88 PangoRectangle ink_rect;
89 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
91 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
95 FT_Face ftface = pango_fc_font_lock_face (fcfont);
96 Box b (Interval (PANGO_LBEARING (ink_rect),
97 PANGO_RBEARING (ink_rect)),
98 Interval (-PANGO_DESCENT (ink_rect),
99 PANGO_ASCENT (ink_rect)));
103 SCM glyph_exprs = SCM_EOL;
104 SCM *tail = &glyph_exprs;
105 for (int i = 0; i < pgs->num_glyphs; i++)
107 PangoGlyphInfo *pgi = pgs->glyphs + i;
109 PangoGlyph pg = pgi->glyph;
110 PangoGlyphGeometry ggeo = pgi->geometry;
112 FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
116 if (glyph_name[0] == '\0')
121 char_id = scm_from_int (pg);
124 char_id = scm_makfrom0str (glyph_name);
125 *tail = scm_cons (scm_list_3 (scm_from_double (ggeo.x_offset * scale_ + dx),
126 scm_from_double (ggeo.y_offset * scale_),
130 tail = SCM_CDRLOC (*tail);
133 PangoFontDescription *descr = pango_font_describe (pa->font);
134 Real size = pango_font_description_get_size (descr)
135 / (Real (PANGO_SCALE));
137 FcPattern *fcpat = fcfont->font_pattern;
139 FcPatternGetString (fcpat, FC_FILE, 0, (FcChar8 **) & filename);
140 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
143 warning (_f ("no PostScript font name for font `%s'", filename));
148 && (String (filename).index (".otf") >= 0
149 || String (filename).index (".cff") >= 0))
153 UGH: kludge a PS name for OTF/CFF fonts.
157 String name = filename;
158 int idx = max (String (filename).index (".otf"),
159 String (filename).index (".cff"));
161 name = name.left_string (idx);
163 int slash_idx = name.index_last ('/'); // UGh. What's happens on windows?
165 name = name.right_string (name.length () - slash_idx - 1);
167 String initial = name.cut_string (0, 1);
169 name = name.nomid_string (0, 1);
171 ps_name = initial + name;
173 else if (ps_name_str0)
174 ps_name = ps_name_str0;
176 if (ps_name.length ())
178 ((Pango_font *) this)->register_font_file (filename, ps_name);
179 pango_fc_font_unlock_face (fcfont);
181 SCM expr = scm_list_4 (ly_symbol2scm ("glyph-string"),
182 scm_makfrom0str (ps_name.to_str0 ()),
183 scm_from_double (size),
184 ly_quote_scm (glyph_exprs));
186 return Stencil (b, expr);
190 warning (_ ("FreeType face has no PostScript font name"));
196 Pango_font::physical_font_tab () const
198 return physical_font_tab_;
202 Pango_font::text_stencil (String str) const
204 GList *items = pango_itemize (context_,
206 0, str.length (), attribute_list_,
214 PangoItem *item = (PangoItem *) ptr->data;
216 Stencil item_stencil = pango_item_string_stencil (item, str, x);
218 x = item_stencil.extent (X_AXIS)[RIGHT];
220 dest.add_stencil (item_stencil);
226 UGH. Should have flags per output format signifying supported
229 if (output_backend_global != "ps"
230 && output_backend_global != "eps")
233 For Pango based backends, we take a shortcut.
235 char *descr_string = pango_font_description_to_string (pango_description_);
237 = scm_list_3 (ly_symbol2scm ("utf8-string"),
238 scm_makfrom0str (descr_string),
239 scm_makfrom0str (str.to_str0 ()));
241 g_free (descr_string);
243 Box b (Interval (0, 0), Interval (0, 0));
244 b.unite (dest.extent_box ());
245 return Stencil (b, exp);
250 if (!dest.extent_box ()[X_AXIS].is_empty ())
252 Stencil frame = Lookup::frame (dest.extent_box (), 0.1, 0.1);
255 Stencil dimless_frame (empty, frame.expr ());
256 dest.add_stencil (frame);
264 Pango_font::font_file_name () const