nu wel 58

[lilypond.git] / lily / afm.cc

diff --git a/lily/afm.cc b/lily/afm.cc
index 9f1f8045f5d4e7bb6567d38e59b89efa464d14b3..3db634c58985b7d6bd1fdeee0872ac00e012179c 100644 (file)
--- a/lily/afm.cc
+++ b/lily/afm.cc
@@ -3,28 +3,46 @@
   
   source file of the Flower Library
   
-  (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 #include "afm.hh"
 #include "warn.hh"
+#include "molecule.hh"
+#include "dimensions.hh"
 
 Adobe_font_metric::Adobe_font_metric (AFM_Font_info * fi)
 {
+  checksum_ = 0;
   font_inf_ = fi;
 
-  for (int i= 256; i--;)
+  for (int i= 256  >? fi->numOfChars; i--;)
     ascii_to_metric_idx_.push (-1);
   
   for (int i=0; i < fi->numOfChars; i++)
     {
       AFM_CharMetricInfo * c = fi->cmi + i;
 
-      ascii_to_metric_idx_[c->code] = i;
+      /*
+       Some TeX afm files contain code = -1. We don't know why, let's
+       ignore it.
+       
+       */
+      if (c->code >= 0)
+       ascii_to_metric_idx_[c->code] = i;
       name_to_metric_dict_[c->name] = i;
     }
 }
-  
+
+
+SCM
+Adobe_font_metric::make_afm (AFM_Font_info *fi, unsigned int checksum)
+{
+  Adobe_font_metric * fm = new Adobe_font_metric (fi);
+  fm->checksum_ = checksum;
+  return fm->self_scm ();    
+}
+
 
 AFM_CharMetricInfo const *
 Adobe_font_metric::find_ascii_metric (int a , bool warn) const
@@ -37,7 +55,7 @@ Adobe_font_metric::find_ascii_metric (int a , bool warn) const
          return font_inf_->cmi + code;
        }
     }
-  else if (warn )
+  else if (warn)
     {
       warning (_f ("can't find character number: %d", a));
     }
@@ -48,13 +66,13 @@ Adobe_font_metric::find_ascii_metric (int a , bool warn) const
 AFM_CharMetricInfo const *
 Adobe_font_metric::find_char_metric (String nm, bool warn) const
 {
-  map<String,int>::const_iterator ai = name_to_metric_dict_.find (nm);
+  std::map<String,int>::const_iterator ai = name_to_metric_dict_.find (nm);
   
   if (ai == name_to_metric_dict_.end ())
     {
       if (warn)
        {
-         warning (_f ("can't find character called: `%s'", nm.ch_C()));
+         warning (_f ("can't find character called: `%s'", nm.ch_C ()));
        }
       return 0;
     }
@@ -62,42 +80,66 @@ Adobe_font_metric::find_char_metric (String nm, bool warn) const
     return font_inf_->cmi + (*ai).second;
 }
 
+int
+Adobe_font_metric::count () const
+{
+  return font_inf_->numOfChars ;
+}
 
 Box
-Adobe_font_metric::get_char (int code, bool warn) const
+Adobe_font_metric::get_char (int code) const
 {
   AFM_CharMetricInfo const
-    * c =  find_ascii_metric (code,warn);
+    * c =  find_ascii_metric (code,false);
+  Box b (Interval (0,0),Interval (0,0));
   if (c)
-    return afm_bbox_to_box (c->charBBox);                      
-  else
-    return Box (Interval (0,0),Interval(0,0));
+    b = afm_bbox_to_box (c->charBBox);                 
+
+  return b;
 }
 
-Adobe_font_metric*
+SCM
 read_afm_file (String nm)
 {
-  FILE *f = fopen (nm.ch_C() , "r");
+  FILE *f = fopen (nm.ch_C () , "r");
+  char s[2048];
+  char *check_key = "TfmCheckSum"; 
+  fgets (s, sizeof (s), f);
 
+  unsigned int cs = 0;  
+  if (strncmp (s, check_key, strlen (check_key)) == 0)
+    {
+      sscanf (s + strlen (check_key), "%ud", &cs);
+    }
+  else
+    {
+      rewind (f);
+    }
+
+    
   AFM_Font_info * fi;
   int ok = AFM_parseFile (f, &fi, ~1);
 
   if (ok)
     {
-      error (_("Error parsing AFM file"));
+      error (_f ("Error parsing AFM file: `%s'", nm.ch_C ()));
       exit (2);
     }
   fclose (f);
 
-  return new Adobe_font_metric (fi);
+  return Adobe_font_metric::make_afm (fi, cs);
 }
 
-  
+
+/*
+  actually, AFMs will be printers point, usually, but our .py script dumps
+  real points.
+ */
 Box
 afm_bbox_to_box (AFM_BBox bb)
 {
-  return Box (Interval (bb.llx, bb.urx)* (1/1000.0),
-             Interval (bb.lly, bb.ury)* (1/1000.0));
+  return Box (Interval (bb.llx, bb.urx)* (1/1000.0) PT,
+             Interval (bb.lly, bb.ury)* (1/1000.0) PT);
 
 }
   
@@ -106,3 +148,32 @@ Adobe_font_metric::~Adobe_font_metric ()
 {
   AFM_free (font_inf_);
 }
+
+/*
+  return a molecule, without fontification 
+ */
+Molecule
+Adobe_font_metric::find_by_name (String s) const
+{
+  AFM_CharMetricInfo const *cm = find_char_metric (s, false);
+
+  if (!cm)
+    {
+      /*
+       Why don't we return empty?
+       */
+      
+      Molecule m;
+      m.set_empty (false);
+      return m;
+    }
+  
+  SCM at = (scm_list_n (ly_symbol2scm ("char"),
+                     gh_int2scm (cm->code),
+                     SCM_UNDEFINED));
+  
+  //  at= fontify_atom ((Font_metric*)this, at);
+  Box b = afm_bbox_to_box (cm->charBBox);
+
+  return Molecule (b, at);
+}