/*
- font-metric.cc -- implement Font_metric
+ font-metric.cc -- implement Font_metric
source file of the GNU LilyPond music typesetter
- (c) 1999--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Mats Bengtsson <matsb@s3.kth.se> (the ugly TeX parsing in text_dimension)
+ Mats Bengtsson <matsb@s3.kth.se> (the ugly TeX parsing in text_dimension)
*/
#include <math.h>
#include <ctype.h>
+#include "scaled-font-metric.hh"
+#include "virtual-methods.hh"
#include "warn.hh"
-#include "molecule.hh"
+#include "stencil.hh"
#include "ly-smobs.icc"
#include "font-metric.hh"
#include "string.hh"
-Box
-Font_metric::text_dimension (String text) const
+Real
+Font_metric::design_size () const
{
- Interval ydims;
- Real w=0.0;
+ return 1.0;
+}
+
+String
+Font_metric::coding_scheme () const
+{
+ return "FontSpecific";
+}
+
+Stencil
+Font_metric::find_by_name (String s) const
+{
+ int idx = name_to_index (s);
+ Box b;
- for (int i = 0; i < text.length_i (); i++)
+ SCM expr = SCM_EOL;
+ if (idx >= 0)
{
-
- switch (text[i])
- {
- case '\\':
- for (i++; (i < text.length_i ()) && !isspace(text[i])
- && text[i]!='{' && text[i]!='}'; i++)
- ;
- // ugh.
- i--; // Compensate for the increment in the outer loop!
- break;
- case '{': // Skip '{' and '}'
- case '}':
- break;
-
- default:
- Box b = get_char ((unsigned char)text[i]);
-
- // Ugh, use the width of 'x' for unknown characters
- if (b[X_AXIS].length () == 0)
- b = get_char ((unsigned char)'x');
-
- w += b[X_AXIS].length ();
- ydims.unite (b[Y_AXIS]);
- break;
- }
+ expr = scm_list_3 (ly_symbol2scm ("char"),
+ self_scm (),
+ scm_int2num (index_to_ascii (idx)));
+ b = get_indexed_char (idx);
}
- if (ydims.empty_b ())
- ydims = Interval (0,0);
+
+ Stencil q (b, expr);
+ return q;
+}
- return Box(Interval (0, w), ydims);
+Font_metric::Font_metric ()
+{
+ description_ = SCM_EOL;
+ self_scm_ = SCM_EOL;
+ smobify_self ();
}
+Font_metric::Font_metric (Font_metric const &)
+{
+}
Font_metric::~Font_metric ()
{
}
-Font_metric::Font_metric ()
+int
+Font_metric::count () const
{
- description_ = SCM_EOL;
+ return 0;
+}
- smobify_self ();
+Box
+Font_metric::get_ascii_char (int) const
+{
+ return Box (Interval (0, 0), Interval (0, 0));
}
-Font_metric::Font_metric (Font_metric const &s)
+Box
+Font_metric::get_indexed_char (int k) const
{
+ return get_ascii_char (k);
}
+int
+Font_metric::name_to_index (String) const
+{
+ return -1;
+}
-Box
-Font_metric::get_char (int )const
+Offset
+Font_metric::get_indexed_wxwy (int )const
{
- return Box (Interval(0,0),Interval (0,0));
+ return Offset (0, 0);
}
+void
+Font_metric::derived_mark () const
+{
+}
SCM
Font_metric::mark_smob (SCM s)
{
- Font_metric * m = (Font_metric*) SCM_CELL_WORD_1(s);
+ Font_metric *m = (Font_metric*) SCM_CELL_WORD_1 (s);
+ m->derived_mark ();
return m->description_;
}
int
-Font_metric::print_smob (SCM s, SCM port, scm_print_state * )
+Font_metric::print_smob (SCM s, SCM port, scm_print_state *)
{
Font_metric *m = unsmob_metrics (s);
- scm_puts ("#<Font_metric ", port);
+ scm_puts ("#<", port);
+ scm_puts (classname (m), port);
+ scm_puts (" ", port);
scm_write (m->description_, port);
scm_puts (">", port);
return 1;
}
-IMPLEMENT_UNSMOB (Font_metric, metrics);
+
IMPLEMENT_SMOBS (Font_metric);
-IMPLEMENT_DEFAULT_EQUAL_P(Font_metric);
-IMPLEMENT_TYPE_P (Font_metric, "font-metric?");
+IMPLEMENT_DEFAULT_EQUAL_P (Font_metric);
+IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?");
+
+
+LY_DEFINE (ly_find_glyph_by_name, "ly:find-glyph-by-name",
+ 2, 0, 0,
+ (SCM font, SCM name),
+ "This function retrieves a Stencil for the glyph named @var{name} "
+ "in "
+ "@var{font}. "
+ "The font must be available as an AFM file. If the glyph "
+ "is not found, @code{#f} is returned. ")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ SCM_ASSERT_TYPE (ly_string_p (name), name, SCM_ARG2, __FUNCTION__, "string");
+
+ Stencil m = fm->find_by_name (ly_scm2string (name));
+
+ /* TODO: make optional argument for default if not found. */
+ return m.smobbed_copy ();
+}
-Molecule
-Font_metric::find_by_name (String) const
+LY_DEFINE (ly_get_glyph, "ly:get-glyph",
+ 2, 0, 0,
+ (SCM font, SCM index),
+ "Retrieve a Stencil for the glyph numbered @var{index} "
+ "in @var{font}.")
{
- Molecule m ;
- return m;
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ SCM_ASSERT_TYPE (ly_number_p (index), index, SCM_ARG2, __FUNCTION__, "number");
+
+ return fm->get_ascii_char_stencil (ly_scm2int (index)).smobbed_copy ();
}
+LY_DEFINE (ly_text_dimension,"ly:text-dimension",
+ 2, 0, 0,
+ (SCM font, SCM text),
+ "Given the font metric in @var{font} and the string @var{text}, "
+ "compute the extents of that text in that font. "
+ "The return value is a pair of number-pairs.")
+{
+ Box b;
+ Modified_font_metric*fm = dynamic_cast<Modified_font_metric*>
+ (unsmob_metrics (font));
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "modified font metric");
+ SCM_ASSERT_TYPE (ly_string_p (text), text, SCM_ARG2, __FUNCTION__, "string");
+
+ b = fm->text_dimension (ly_scm2string (text));
+
+ return scm_cons (ly_interval2scm (b[X_AXIS]), ly_interval2scm (b[Y_AXIS]));
+}
-SCM
-ly_find_glyph_by_name (SCM font, SCM name)
+LY_DEFINE (ly_font_name,"ly:font-name",
+ 1, 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, "
+ "return the corresponding file name.")
{
- if (!unsmob_metrics (font) || !gh_string_p (name))
- {
- warning ("ly-find-glyph-by-name: invalid argument.");
- Molecule m;
- return m.smobbed_copy ();
- }
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return ly_car (fm->description_);
+}
+
+LY_DEFINE (ly_font_magnification,"ly:font-magnification", 1 , 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, return the "
+ "magnification, relative to the current outputscale.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return ly_cdr (fm->description_);
+}
+
+LY_DEFINE (ly_font_design_size,"ly:font-design-size", 1 , 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, return the "
+ "design size, relative to the current outputscale.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return scm_make_real (fm->design_size ());
+}
+
+
- return unsmob_metrics (font)->find_by_name (ly_scm2string (name)).smobbed_copy ();
+int
+Font_metric::index_to_ascii (int i) const
+{
+ return i;
}
+Stencil
+Font_metric::get_ascii_char_stencil (int code) const
+{
+ SCM at = scm_list_3 (ly_symbol2scm ("char"),
+ this->self_scm (),
+ scm_int2num (code));
+ Box b = get_ascii_char (code);
+ return Stencil (b, at);
+}
-static void
-font_metric_init ()
+Stencil
+Font_metric::get_indexed_char_stencil (int code) const
{
- scm_make_gsubr ("ly-find-glyph-by-name", 2 , 0, 0, (Scheme_function_unknown) ly_find_glyph_by_name);
+ SCM at = scm_list_3 (ly_symbol2scm ("char"),
+ self_scm (),
+ scm_int2num (code));
+ Box b = get_indexed_char (code);
+ return Stencil (b, at);
}
-ADD_SCM_INIT_FUNC(font_metric_init, font_metric_init);
+int
+/*Font_metric::*/
+get_encoded_index (Font_metric *m, String input_coding, int code)
+{
+ String font_coding = m->coding_scheme ();
+ if (font_coding == input_coding)
+ return code;
+ SCM s = scm_call_3 (ly_scheme_function ("encoded-index"),
+ scm_makfrom0str (input_coding.to_str0 ()),
+ scm_makfrom0str (font_coding.to_str0 ()),
+ scm_int2num (code));
+ return ly_scm2int (s);
+}
projects / lilypond.git / blobdiff