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 "virtual-methods.hh"
21 #include "ly-smobs.icc"
24 Font_metric::design_size () const
30 Font_metric::coding_scheme () const
32 return "FontSpecific";
36 Font_metric::find_by_name (String s) const
38 int idx = name_to_index (s);
44 expr = scm_list_3 (ly_symbol2scm ("char"),
46 scm_int2num (index_to_ascii (idx)));
47 b = get_indexed_char (idx);
54 Font_metric::Font_metric ()
56 description_ = SCM_EOL;
61 Font_metric::Font_metric (Font_metric const &)
66 Font_metric::~Font_metric ()
71 Font_metric::count () const
77 Font_metric::get_ascii_char (int) const
79 return Box (Interval (0, 0), Interval (0, 0));
83 Font_metric::get_indexed_char (int k) const
85 return get_ascii_char (k);
89 Font_metric::name_to_index (String) const
95 Font_metric::get_indexed_wxwy (int) const
101 Font_metric::derived_mark () const
106 Font_metric::mark_smob (SCM s)
108 Font_metric *m = (Font_metric*) SCM_CELL_WORD_1 (s);
110 return m->description_;
114 Font_metric::print_smob (SCM s, SCM port, scm_print_state *)
116 Font_metric *m = unsmob_metrics (s);
117 scm_puts ("#<", port);
118 scm_puts (classname (m), port);
119 scm_puts (" ", port);
120 scm_write (m->description_, port);
121 scm_puts (">", port);
127 IMPLEMENT_SMOBS (Font_metric);
128 IMPLEMENT_DEFAULT_EQUAL_P (Font_metric);
129 IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?");
132 LY_DEFINE (ly_find_glyph_by_name, "ly:find-glyph-by-name",
134 (SCM font, SCM name),
135 "This function retrieves a Stencil for the glyph named @var{name} "
138 "The font must be available as an AFM file. If the glyph "
139 "is not found, @code{#f} is returned. ")
141 Font_metric *fm = unsmob_metrics (font);
142 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
143 SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG2, __FUNCTION__, "string");
145 Stencil m = fm->find_by_name (ly_scm2string (name));
147 /* TODO: make optional argument for default if not found. */
148 return m.smobbed_copy ();
151 LY_DEFINE (ly_get_glyph, "ly:get-glyph",
153 (SCM font, SCM index),
154 "Retrieve a Stencil for the glyph numbered @var{index} "
157 Font_metric *fm = unsmob_metrics (font);
158 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
159 SCM_ASSERT_TYPE (scm_is_number (index), index, SCM_ARG2, __FUNCTION__, "number");
161 return fm->get_ascii_char_stencil (scm_to_int (index)).smobbed_copy ();
164 LY_DEFINE (ly_text_dimension,"ly:text-dimension",
166 (SCM font, SCM text),
167 "Given the font metric in @var{font} and the string @var{text}, "
168 "compute the extents of that text in that font. "
169 "The return value is a pair of number-pairs.")
172 Modified_font_metric*fm = dynamic_cast<Modified_font_metric*>
173 (unsmob_metrics (font));
174 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "modified font metric");
175 SCM_ASSERT_TYPE (scm_is_string (text), text, SCM_ARG2, __FUNCTION__, "string");
177 b = fm->text_dimension (ly_scm2string (text));
179 return scm_cons (ly_interval2scm (b[X_AXIS]), ly_interval2scm (b[Y_AXIS]));
182 LY_DEFINE (ly_font_file_name,"ly:font-file-name",
185 "Given the font metric @var{font}, "
186 "return the corresponding file name.")
188 Font_metric *fm = unsmob_metrics (font);
189 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
190 return scm_car (fm->description_);
196 LY_DEFINE (ly_font_name,"ly:font-name",
199 "Given the font metric @var{font}, "
200 "return the corresponding name.")
202 Font_metric *fm = unsmob_metrics (font);
204 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
207 if (Modified_font_metric* mfm = dynamic_cast<Modified_font_metric*> (fm))
208 return ly_font_name (mfm->original_font ()->self_scm ());
209 else if (Adobe_font_metric* afm = dynamic_cast<Adobe_font_metric*> (fm))
211 return scm_makfrom0str (afm->font_info_->gfi->fontName);
219 LY_DEFINE (ly_font_magnification,"ly:font-magnification", 1 , 0, 0,
221 "Given the font metric @var{font}, return the "
222 "magnification, relative to the current outputscale.")
224 Font_metric *fm = unsmob_metrics (font);
225 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
226 return scm_cdr (fm->description_);
229 LY_DEFINE (ly_font_design_size,"ly:font-design-size", 1 , 0, 0,
231 "Given the font metric @var{font}, return the "
232 "design size, relative to the current outputscale.")
234 Font_metric *fm = unsmob_metrics (font);
235 SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
236 return scm_make_real (fm->design_size ());
242 Font_metric::index_to_ascii (int i) const
248 Font_metric::get_ascii_char_stencil (int code) const
250 SCM at = scm_list_3 (ly_symbol2scm ("char"),
253 Box b = get_ascii_char (code);
254 return Stencil (b, at);
258 Font_metric::get_indexed_char_stencil (int code) const
260 int idx = index_to_ascii (code);
261 SCM at = scm_list_3 (ly_symbol2scm ("char"), self_scm (), scm_int2num (idx));
262 Box b = get_indexed_char (code);
263 return Stencil (b, at);
268 get_encoded_index (Font_metric *m, String input_coding, int code)
270 String font_coding = m->coding_scheme ();
271 if (font_coding == input_coding)
273 SCM s = scm_call_3 (ly_scheme_function ("encoded-index"),
274 scm_makfrom0str (input_coding.to_str0 ()),
275 scm_makfrom0str (font_coding.to_str0 ()),
277 return scm_to_int (s);