/*
- tfm.cc -- implement Tex_font_metric
+ tfm.cc -- implement Tex_font_metric
source file of the GNU LilyPond music typesetter
- (c) 1999 Jan Nieuwenhuizen <janneke@gnu.org>
-
+ (c) 1999--2004 Jan Nieuwenhuizen <janneke@gnu.org>
some code shamelessly copied from GNU fontutils-0.6/tfm/tfm_input.c
*/
#include "tfm.hh"
+
#include "tfm-reader.hh"
#include "string-convert.hh"
-#include "debug.hh"
#include "warn.hh"
+#include "dimensions.hh"
+
+static SCM tex_dimension_hash_tab;
+static Tex_font_char_metric dummy_static_char_metric;
+
+
Box
-Tex_font_char_metric::dimensions () const
+lookup_tex_text_dimension (Font_metric *font,
+ SCM text)
{
- Real d = -depth_;
- return Box (Interval (0, width_),Interval ( d <? height_, d >? height_));
+ Box b;
+
+ SCM limit = ly_lily_module_constant ("TEX_STRING_HASHLIMIT");
+ String key_str = ly_scm2string (font->font_file_name());
+ int hash_code = scm_to_int (scm_hash (text, limit));
+ key_str = to_string (hash_code) + key_str;
+
+ SCM val = scm_hash_ref (tex_dimension_hash_tab,
+ scm_makfrom0str (key_str.to_str0 ()),
+ SCM_BOOL_F);
+
+ if (scm_is_pair (val))
+ {
+ b[X_AXIS][LEFT] = 0.0 PT;
+ b[X_AXIS][RIGHT] = scm_to_double (scm_car (val)) PT;
+ val = scm_cdr (val);
+ b[Y_AXIS][UP] = scm_to_double (scm_car (val)) PT;
+ val = scm_cdr (val);
+ b[Y_AXIS][DOWN] = scm_to_double (scm_car (val)) PT;
+ }
+
+ return b;
}
+
Tex_font_char_metric::Tex_font_char_metric ()
{
- exists_b_ = false;
+ exists_ = false;
code_ = 0;;
- width_ = height_ = depth_ = italic_correction_ = 0;
- width_fix_ = height_fix_ = depth_fix_ = italic_correction_fix_ = 0;
+ width_ = 0;
+ height_ = 0;
+ depth_ = 0;
+ italic_correction_ = 0;
+ width_fix_ = 0;
+ height_fix_ = 0;
+ depth_fix_ = 0;
+ italic_correction_fix_ = 0;
}
-#define APPEND_CHAR_METRIC_ELT(k) outstr += to_str (#k) + " " + to_str (k ## _) + "; "
-
-String
-Tex_font_char_metric::str () const
+Box
+Tex_font_char_metric::dimensions () const
{
- String outstr ;
-
- APPEND_CHAR_METRIC_ELT (exists_b);
- APPEND_CHAR_METRIC_ELT (code);
- APPEND_CHAR_METRIC_ELT (width);
- APPEND_CHAR_METRIC_ELT (height);
- APPEND_CHAR_METRIC_ELT (depth);
- APPEND_CHAR_METRIC_ELT (italic_correction);
+ if (!exists_)
+ {
+ Box b;
+ b.set_empty ();
+ return b;
+ }
- return outstr + "\n";
+ Real d = -depth_;
+
+ Real point_constant = 1 PT;
+
+ return Box (Interval (0, width_*point_constant ),
+ Interval ((d <? height_)*point_constant,
+ (d >? height_)*point_constant));
}
Tex_font_metric::Tex_font_metric ()
{
+ encoding_table_ = SCM_EOL;
}
-static Tex_font_char_metric dummy_static_char_metric;
+void
+Tex_font_metric::derived_mark () const
+{
+ scm_gc_mark (encoding_table_);
+}
-Tex_font_char_metric const &
+Tex_font_char_metric const *
Tex_font_metric::find_ascii (int ascii, bool warn) const
{
- if (ascii_to_metric_idx_[ascii] >= 0)
- return char_metrics_[ascii_to_metric_idx_ [ascii]];
+ if (ascii >= 0 && ascii < ascii_to_metric_idx_.size ()
+ && ascii_to_metric_idx_[ascii] >= 0)
+ return & char_metrics_[ascii_to_metric_idx_ [ascii]];
else if (warn)
+ warning (_f ("can't find ascii character: %d", ascii));
+ return &dummy_static_char_metric;
+}
- {
- warning (_f ("can't find ascii character `%d'", ascii));
+/* UGH: glyphs need not be consecutive in TFM. */
+int
+Tex_font_metric::count () const
+{
+ for (int i = ascii_to_metric_idx_.size (); i--;)
+ if (ascii_to_metric_idx_[i] != -1)
+ return i + 1;
+ return 0;
+}
- }
- return dummy_static_char_metric;
+Box
+Tex_font_metric::get_ascii_char (int a) const
+{
+ Box b = find_ascii (a)->dimensions ();
+ return b;
}
-Character_metric*
-Tex_font_metric::get_char (int a, bool w) const
+SCM
+Tex_font_metric::make_tfm (String file_name)
{
- return &find_ascii (a, w);
+ Tex_font_metric *tfm = new Tex_font_metric;
+ Tex_font_metric_reader reader (file_name);
+
+ tfm->info_ = reader.info_;
+ tfm->header_ = reader.header_;
+ tfm->char_metrics_ = reader.char_metrics_;
+ tfm->ascii_to_metric_idx_ = reader.ascii_to_metric_idx_;
+ tfm->encoding_table_
+ = scm_call_1 (ly_lily_module_constant ("get-coding-table"),
+ scm_makfrom0str (tfm->coding_scheme ().to_str0 ()));
+
+ return tfm->self_scm ();
}
+Real
+Tex_font_metric::design_size () const
+{
+ return info_.design_size;
+}
String
-Tex_font_metric::str () const
+Tex_font_metric::coding_scheme () const
{
- String outstr;
- for (int i=0; i < char_metrics_.size (); i++)
- outstr += char_metrics_[i].str ();
-
- return outstr;
+ String scm = info_.coding_scheme;
+
+ for(int i = 0; i < scm.length (); i++)
+ if (scm[i] == ' ')
+ scm[i] = '-';
+
+ return scm;
}
-void
-Tex_font_metric::clear (int n)
+int
+Tex_font_metric::name_to_index (String s) const
{
- for (int i=0; i < n; i++)
- ascii_to_metric_idx_.push (-1);
+ SCM sym = ly_symbol2scm (s.to_str0 ());
+
+ SCM idx = scm_hash_ref (encoding_table_, sym, SCM_BOOL_F);
+ if (ly_c_char_p (idx))
+ {
+ return (unsigned char) ly_scm2char (idx);
+ }
+ else
+ return -1;
}
-void
-Tex_font_metric::read_file (String name)
+
+LY_DEFINE(ly_load_text_dimensions, "ly:load-text-dimensions",
+ 1, 0, 0,
+ (SCM dimension_alist),
+ "Load dimensions from TeX in a (KEY . (W H D)) format alist")
{
- Tex_font_metric_reader tfm_reader (name);
- *this = tfm_reader.read_tfm ();
-}
+ if (!tex_dimension_hash_tab)
+ {
+ tex_dimension_hash_tab =
+ scm_gc_protect_object (scm_make_hash_table (scm_from_int (113)));
+ }
+
+ for (SCM s = dimension_alist;
+ scm_is_pair (s);
+ s = scm_cdr (s))
+ {
+ SCM key = scm_caar (s);
+ SCM val = scm_cdar (s);
+
+ if (scm_hash_ref (tex_dimension_hash_tab, key, SCM_BOOL_F)
+ == SCM_BOOL_F)
+ {
+ scm_hash_set_x (tex_dimension_hash_tab, key, val);
+ }
+ }
+ return SCM_UNSPECIFIED;
+}
projects / lilypond.git / blobdiff