2 font-metric.cc -- implement Font_metric
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 Mats Bengtsson <matsb@s3.kth.se> (the ugly TeX parsing in text_dimension)
11 #include "font-metric.hh"
16 #include "modified-font-metric.hh"
17 #include "open-type-font.hh"
19 #include "virtual-methods.hh"
22 #include "ly-smobs.icc"
25 Font_metric::design_size () const
31 Font_metric::coding_scheme () const
33 return "FontSpecific";
37 Font_metric::find_by_name (String s) const
39 s.substitute_char ('-', "M");
40 int idx = name_to_index (s);
46 expr = scm_list_3 (ly_symbol2scm ("named-glyph"),
48 scm_makfrom0str (s.to_str0 ())
50 b = get_indexed_char (idx);
57 Font_metric::Font_metric ()
59 description_ = SCM_EOL;
64 Font_metric::Font_metric (Font_metric const &)
69 Font_metric::~Font_metric ()
74 Font_metric::count () const
80 Font_metric::get_ascii_char (int) const
82 return Box (Interval (0, 0), Interval (0, 0));
86 Font_metric::get_indexed_char (int k) const
88 return get_ascii_char (k);
92 Font_metric::name_to_index (String) const
98 Font_metric::get_indexed_wxwy (int) const
100 return Offset (0, 0);
104 Font_metric::derived_mark () const
109 Font_metric::mark_smob (SCM s)
111 Font_metric *m = (Font_metric*) SCM_CELL_WORD_1 (s);
113 return m->description_;
117 Font_metric::print_smob (SCM s, SCM port, scm_print_state *)
119 Font_metric *m = unsmob_metrics (s);
120 scm_puts ("#<", port);
121 scm_puts (classname (m), port);
122 scm_puts (" ", port);
123 scm_write (m->description_, port);
124 scm_puts (">", port);
130 IMPLEMENT_SMOBS (Font_metric);
131 IMPLEMENT_DEFAULT_EQUAL_P (Font_metric);
132 IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?");
135 LY_DEFINE (ly_font_get_glyph, "ly:font-get-glyph",
137 (SCM font, SCM name),
138 "Return a Stencil from @var{font} for the glyph named @var{name}. "
139 "@var{font} must be available as an AFM file. If the glyph "
140 "is not available, return @code{#f}.")
142 Font_metric *fm = unsmob_metrics (font);
143 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
144 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG2, __FUNCTION__, "string");
146 Stencil m = fm->find_by_name (ly_scm2string (name));
148 /* TODO: make optional argument for default if not found. */
149 return m.smobbed_copy ();
152 LY_DEFINE (ly_get_glyph, "ly:get-glyph",
154 (SCM font, SCM index),
155 "Retrieve a Stencil for the glyph numbered @var{index} "
158 Font_metric *fm = unsmob_metrics (font);
159 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
160 SCM_ASSERT_TYPE (scm_is_number (index), index, SCM_ARG2, __FUNCTION__, "number");
162 return fm->get_ascii_char_stencil (scm_to_int (index)).smobbed_copy ();
165 LY_DEFINE (ly_font_glyph_name_to_index, "ly:font-glyph-name-to-index",
167 (SCM font, SCM name),
168 "Return the index for @{name} in @var{font}.")
170 Font_metric *fm = unsmob_metrics (font);
171 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
172 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG2, __FUNCTION__, "string");
174 return scm_from_int (fm->name_to_index (ly_scm2string (name)));
177 LY_DEFINE (ly_font_index_to_charcode, "ly:font-index-to-charcode",
179 (SCM font, SCM index),
180 "Return the character code for @var{index} @var{font}.")
182 Font_metric *fm = unsmob_metrics (font);
183 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
184 SCM_ASSERT_TYPE (scm_is_integer (index), index, SCM_ARG2, __FUNCTION__, "index");
187 if (Modified_font_metric* mfm = dynamic_cast<Modified_font_metric*> (fm))
188 charcode = mfm->original_font ()->index_to_charcode (ly_scm2int (index));
190 charcode = fm->index_to_charcode (ly_scm2int (index));
192 return scm_from_unsigned_integer (charcode);
195 LY_DEFINE (ly_font_glyph_name_to_charcode, "ly:font-glyph-name-to-charcode",
197 (SCM font, SCM name),
198 "Return the character code for glyph @{name} in @var{font}.")
200 Font_metric *fm = unsmob_metrics (font);
201 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
202 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG2, __FUNCTION__, "string");
205 if (Modified_font_metric* mfm = dynamic_cast<Modified_font_metric*> (fm))
206 charcode = mfm->original_font ()->index_to_charcode (mfm->original_font ()->name_to_index (ly_scm2string (name)));
208 charcode = fm->index_to_charcode (fm->name_to_index (ly_scm2string (name)));
211 if (Modified_font_metric* mfm = dynamic_cast<Modified_font_metric*> (fm))
212 charcode = mfm->original_font ()->glyph_name_to_charcode (ly_scm2string (name));
214 charcode = fm->glyph_name_to_charcode (ly_scm2string (name));
217 return scm_from_unsigned_integer (charcode);
220 LY_DEFINE (ly_text_dimension,"ly:text-dimension",
222 (SCM font, SCM text),
223 "Given the font metric in @var{font} and the string @var{text}, "
224 "compute the extents of that text in that font. "
225 "The return value is a pair of number-pairs.")
228 Modified_font_metric*fm = dynamic_cast<Modified_font_metric*>
229 (unsmob_metrics (font));
230 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "modified font metric");
231 SCM_ASSERT_TYPE (scm_is_string (text), text, SCM_ARG2, __FUNCTION__, "string");
233 b = fm->text_dimension (ly_scm2string (text));
235 return scm_cons (ly_interval2scm (b[X_AXIS]), ly_interval2scm (b[Y_AXIS]));
238 LY_DEFINE (ly_font_file_name,"ly:font-file-name",
241 "Given the font metric @var{font}, "
242 "return the corresponding file name.")
244 Font_metric *fm = unsmob_metrics (font);
245 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
246 return scm_car (fm->description_);
252 LY_DEFINE (ly_font_name,"ly:font-name",
255 "Given the font metric @var{font}, "
256 "return the corresponding name.")
258 Font_metric *fm = unsmob_metrics (font);
260 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
263 if (Modified_font_metric* mfm = dynamic_cast<Modified_font_metric*> (fm))
264 return ly_font_name (mfm->original_font ()->self_scm ());
265 else if (Adobe_font_metric* afm = dynamic_cast<Adobe_font_metric*> (fm))
266 return scm_makfrom0str (afm->font_info_->gfi->fontName);
272 LY_DEFINE (ly_font_magnification,"ly:font-magnification", 1 , 0, 0,
274 "Given the font metric @var{font}, return the "
275 "magnification, relative to the current outputscale.")
277 Font_metric *fm = unsmob_metrics (font);
278 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
279 return scm_cdr (fm->description_);
282 LY_DEFINE (ly_font_design_size,"ly:font-design-size", 1 , 0, 0,
284 "Given the font metric @var{font}, return the "
285 "design size, relative to the current outputscale.")
287 Font_metric *fm = unsmob_metrics (font);
288 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
289 return scm_make_real (fm->design_size ());
295 Font_metric::index_to_ascii (int i) const
301 Font_metric::index_to_charcode (int i) const
303 return (unsigned) index_to_ascii (i);
308 Font_metric::glyph_name_to_charcode (String glyph_name) const
310 return (unsigned) index_to_ascii (name_to_index (glyph_name));
315 Font_metric::get_ascii_char_stencil (int code) const
317 SCM at = scm_list_3 (ly_symbol2scm ("char"), self_scm (),
319 Box b = get_ascii_char (code);
320 return Stencil (b, at);
324 Font_metric::get_indexed_char_stencil (int code) const
326 int idx = index_to_ascii (code);
327 SCM at = scm_list_3 (ly_symbol2scm ("char"), self_scm (), scm_int2num (idx));
328 Box b = get_indexed_char (code);
329 return Stencil (b, at);
334 get_encoded_index (Font_metric *m, String input_coding, int code)
336 String font_coding = m->coding_scheme ();
337 if (font_coding == input_coding)
339 SCM s = scm_call_3 (ly_scheme_function ("encoded-index"),
340 scm_makfrom0str (input_coding.to_str0 ()),
341 scm_makfrom0str (font_coding.to_str0 ()),
343 return scm_to_int (s);
347 Font_metric::attachment_point (String) const
349 return Offset (0, 0);