lily/font-interface.cc

   1 /*
   2   font-interface.cc --  implement Font_interface
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "all-font-metrics.hh"
  11 #include "font-metric.hh"
  12 #include "font-interface.hh"
  13 #include "grob.hh"
  14 #include "paper-def.hh"
  15 #include "warn.hh"
  16
  17
  18 SCM
  19 Font_interface::font_alist_chain (Grob *me)
  20 {
  21   SCM defaults = gh_cdr (scm_assoc (ly_symbol2scm ("font-defaults"),
  22                                     me->paper_l ()->style_sheet_ ));
  23
  24   SCM ch = gh_list (me->mutable_property_alist_,
  25                     me->immutable_property_alist_,
  26                     defaults,
  27                     SCM_UNDEFINED);
  28
  29   return ch;
  30 }
  31
  32 /*
  33   todo: split up this func, reuse in text_item?
  34  */
  35 Font_metric *
  36 Font_interface::get_default_font (Grob*me)
  37 {
  38   Font_metric * fm =  unsmob_metrics (me->get_grob_property ("font"));
  39   if (fm)
  40     return fm;
  41
  42   fm = get_font (me,  font_alist_chain (me));
  43   me->set_grob_property ("font", fm->self_scm ());
  44   return fm;
  45 }
  46
  47 Font_metric *
  48 Font_interface::get_font (Grob *me, SCM chain)
  49 {
  50
  51   SCM ss = me->paper_l ()->style_sheet_;
  52
  53   SCM proc = gh_cdr (scm_assoc (ly_symbol2scm ("properties-to-font"),
  54                                 ss));
  55
  56   SCM fonts = gh_cdr (scm_assoc (ly_symbol2scm ("fonts"), ss));
  57
  58   assert (gh_procedure_p (proc));
  59   SCM font_name = gh_call2 (proc, fonts, chain);
  60
  61   Font_metric *fm = me->paper_l ()->find_font (font_name, 1.0);
  62
  63   return fm;
  64 }
  65
  66 SCM
  67 Font_interface::add_style (Grob* me, SCM style, SCM chain)
  68 {
  69   assert (gh_symbol_p (style));
  70
  71   SCM sheet = me->paper_l ()->style_sheet_;
  72
  73   SCM style_alist = gh_cdr (scm_assoc (ly_symbol2scm ("style-alist"), sheet));
  74   SCM entry = scm_assoc (style, style_alist);
  75   if (gh_pair_p (entry))
  76     {
  77       chain = gh_cons (gh_cdr (entry), chain);
  78     }
  79   return chain;
  80 }
  81
  82 /*
  83 SCM routines:
  84
  85 Interpreting music...
  86 MIDI output to wtk1-fugue2.midi...
  87 Track ...
  88
  89 real    0m31.862s
  90 user    0m29.110s
  91 sys     0m0.260s
  92
  93 real    0m26.964s
  94 user    0m24.850s
  95 sys     0m0.280s
  96
  97
  98 so a 14% speedup.
  99
 100 */
 101
 102 static SCM name_sym, shape_sym, family_sym, series_sym, rel_sz_sym, pt_sz_sym;
 103
 104
 105 static void
 106 init_syms ()
 107 {
 108   name_sym = scm_permanent_object (ly_symbol2scm ("font-name"));
 109   shape_sym  = scm_permanent_object (ly_symbol2scm ("font-shape"));
 110   family_sym = scm_permanent_object (ly_symbol2scm ("font-family"));
 111   series_sym = scm_permanent_object (ly_symbol2scm ("font-series"));
 112   rel_sz_sym = scm_permanent_object (ly_symbol2scm ("font-relative-size"));
 113   pt_sz_sym = scm_permanent_object (ly_symbol2scm ("font-point-size"));
 114 }
 115
 116
 117 ADD_SCM_INIT_FUNC(Font_interface_syms,init_syms);
 118
 119
 120 MAKE_SCHEME_CALLBACK(Font_interface,properties_to_font_name,2);
 121 SCM
 122 Font_interface::properties_to_font_name (SCM fonts, SCM alist_chain)
 123 {
 124   SCM name = ly_assoc_chain (name_sym, alist_chain);
 125
 126   SCM shape = SCM_BOOL_F;
 127   SCM family = SCM_BOOL_F;
 128   SCM series = SCM_BOOL_F;
 129
 130
 131   SCM point_sz = ly_assoc_chain (pt_sz_sym, alist_chain);
 132   SCM rel_sz = SCM_BOOL_F;
 133
 134   if (!gh_pair_p (name))
 135     {
 136        shape = ly_assoc_chain (shape_sym, alist_chain);
 137        family = ly_assoc_chain (family_sym, alist_chain);
 138        series = ly_assoc_chain (series_sym, alist_chain);
 139
 140        if (gh_pair_p (shape))
 141          shape = gh_cdr (shape);
 142        if (gh_pair_p (family))
 143          family = gh_cdr (family);
 144        if (gh_pair_p (series))
 145          series = gh_cdr (series);
 146     }
 147   else
 148     name = gh_cdr (name);
 149
 150
 151   if (gh_pair_p (point_sz))
 152     point_sz = gh_cdr (point_sz);
 153   else
 154     {
 155       rel_sz = ly_assoc_chain (rel_sz_sym, alist_chain);
 156       if (gh_pair_p (rel_sz))
 157         rel_sz = gh_cdr (rel_sz);
 158     }
 159
 160   for (SCM s = fonts ; gh_pair_p (s); s = gh_cdr (s))
 161     {
 162       SCM qlist = gh_caar (s);
 163
 164       if (name != SCM_BOOL_F)
 165         {
 166           if (scm_list_ref (qlist, gh_int2scm (4)) != name)
 167             continue;
 168         }
 169       else
 170         {
 171           if (series != SCM_BOOL_F
 172               && scm_list_ref (qlist, gh_int2scm (1)) != series)
 173             continue;
 174           if (shape != SCM_BOOL_F
 175               && scm_list_ref (qlist, gh_int2scm (2)) != shape)
 176             continue;
 177           if (family != SCM_BOOL_F
 178               && scm_list_ref (qlist, gh_int2scm (3)) != family)
 179             continue;
 180         }
 181
 182       if (point_sz != SCM_BOOL_F)
 183         {
 184           if (scm_list_ref (qlist, gh_int2scm (4)) != name)
 185             continue;
 186         }
 187       else
 188         {
 189           if (rel_sz != SCM_BOOL_F
 190               && gh_car (qlist) != rel_sz)
 191             continue;
 192         }
 193
 194
 195       SCM qname = gh_cdar (s);
 196       return qname;
 197     }
 198
 199   warning (_("couldn't find any font satisfying ") );
 200   scm_write (gh_list (name, point_sz, shape, series , family, rel_sz, SCM_UNDEFINED), scm_current_error_port ());
 201
 202   return ly_str02scm ("cmr10");
 203
 204 }