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,
25 PangoFontDescription *description,
29 physical_font_tab_ = scm_c_make_hash_table (11);
30 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
32 = pango_ft2_get_context (PANGO_RESOLUTION, PANGO_RESOLUTION);
33 // context_ = pango_ft2_font_map_create_context (fontmap);
35 pango_description_ = pango_font_description_copy (description);
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 output_scale_ = 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 const *item, String str) const
79 const int GLYPH_NAME_LEN = 256;
80 char glyph_name[GLYPH_NAME_LEN];
81 PangoAnalysis const *pa = &(item->analysis);
82 PangoGlyphString *pgs = pango_glyph_string_new ();
84 pango_shape (str.to_str0 () + item->offset,
85 item->length, (PangoAnalysis*) 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;
106 bool cid_keyed = false;
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);
117 if (glyph_name[0] == '\0')
123 char_id = scm_from_int (pg);
126 char_id = scm_makfrom0str (glyph_name);
128 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
129 scm_from_double (ggeo.x_offset * scale_),
130 scm_from_double (ggeo.y_offset * scale_),
134 tail = SCM_CDRLOC (*tail);
137 PangoFontDescription *descr = pango_font_describe (pa->font);
138 Real size = pango_font_description_get_size (descr)
139 / (Real (PANGO_SCALE));
141 FcPattern *fcpat = fcfont->font_pattern;
142 char *file_name_as_ptr = 0;
143 FcPatternGetString (fcpat, FC_FILE, 0, (FcChar8 **) & file_name_as_ptr);
146 if (file_name_as_ptr)
148 /* Normalize file name. */
149 file_name = File_name (file_name_as_ptr).to_string ();
152 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
155 warning (_f ("no PostScript font name for font `%s'", file_name));
160 && (file_name.index (".otf") >= 0
161 || file_name.index (".cff") >= 0))
164 /* UGH: kludge a PS name for OTF/CFF fonts. */
165 String name = file_name;
166 int idx = max (file_name.index (".otf"),
167 file_name.index (".cff"));
169 name = name.left_string (idx);
171 int slash_idx = name.index_last ('/');
173 name = name.right_string (name.length () - slash_idx - 1);
175 String initial = name.cut_string (0, 1);
177 name = name.nomid_string (0, 1);
179 ps_name = initial + name;
181 else if (ps_name_str0)
182 ps_name = ps_name_str0;
184 if (ps_name.length ())
186 ((Pango_font *) this)->register_font_file (file_name, ps_name);
187 pango_fc_font_unlock_face (fcfont);
189 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
190 scm_makfrom0str (ps_name.to_str0 ()),
191 scm_from_double (size),
192 scm_from_bool (cid_keyed),
193 ly_quote_scm (glyph_exprs));
195 return Stencil (b, expr);
198 warning (_ ("FreeType face has no PostScript font name"));
203 Pango_font::physical_font_tab () const
205 return physical_font_tab_;
209 Pango_font::text_stencil (String str) const
212 = pango_itemize (context_,
214 0, str.length (), attribute_list_,
221 Direction text_dir = RIGHT;
222 for (GList *p = items; p; p = p->next)
224 PangoItem *item = (PangoItem *) p->data;
225 if (item->analysis.level == PANGO_DIRECTION_RTL)
229 for (GList *ptr = items; ptr; ptr = ptr->next)
231 PangoItem *item = (PangoItem *) ptr->data;
233 Stencil item_stencil = pango_item_string_stencil (item, str);
235 if (text_dir == RIGHT)
237 item_stencil.translate_axis (last_x, X_AXIS);
238 last_x = item_stencil.extent (X_AXIS)[RIGHT];
240 else if (text_dir == LEFT)
242 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
245 #if 0 /* Check extents. */
246 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
248 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
251 Stencil dimless_frame (empty, frame.expr ());
252 dest.add_stencil (frame);
256 dest.add_stencil (item_stencil);
260 UGH. Should have flags per output format signifying supported
263 if (output_backend_global != "ps"
264 && output_backend_global != "eps")
267 For Pango based backends, we take a shortcut.
269 char *descr_string = pango_font_description_to_string (pango_description_);
271 = scm_list_3 (ly_symbol2scm ("utf-8-string"),
272 scm_makfrom0str (descr_string),
273 scm_makfrom0str (str.to_str0 ()));
275 g_free (descr_string);
277 Box b (Interval (0, 0), Interval (0, 0));
278 b.unite (dest.extent_box ());
279 return Stencil (b, exp);
287 Pango_font::font_file_name () const