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, wild_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   wild_sym = scm_permanent_object (ly_symbol2scm ("*"));
 115 }
 116
 117 bool
 118 Font_interface::wild_compare(SCM field_val, SCM val)
 119 {
 120   return (val == SCM_BOOL_F || field_val == wild_sym || field_val == val);
 121 }
 122
 123 ADD_SCM_INIT_FUNC(Font_interface_syms,init_syms);
 124
 125
 126 MAKE_SCHEME_CALLBACK(Font_interface,properties_to_font_name,2);
 127 SCM
 128 Font_interface::properties_to_font_name (SCM fonts, SCM alist_chain)
 129 {
 130   SCM name = ly_assoc_chain (name_sym, alist_chain);
 131
 132   SCM shape = SCM_BOOL_F;
 133   SCM family = SCM_BOOL_F;
 134   SCM series = SCM_BOOL_F;
 135
 136
 137   SCM point_sz = ly_assoc_chain (pt_sz_sym, alist_chain);
 138   SCM rel_sz = SCM_BOOL_F;
 139
 140   if (!gh_pair_p (name))
 141     {
 142        shape = ly_assoc_chain (shape_sym, alist_chain);
 143        family = ly_assoc_chain (family_sym, alist_chain);
 144        series = ly_assoc_chain (series_sym, alist_chain);
 145
 146        if (gh_pair_p (shape))
 147          shape = gh_cdr (shape);
 148        if (gh_pair_p (family))
 149          family = gh_cdr (family);
 150        if (gh_pair_p (series))
 151          series = gh_cdr (series);
 152     }
 153   else
 154     name = gh_cdr (name);
 155
 156
 157   if (gh_pair_p (point_sz))
 158     point_sz = gh_cdr (point_sz);
 159   else
 160     {
 161       rel_sz = ly_assoc_chain (rel_sz_sym, alist_chain);
 162       if (gh_pair_p (rel_sz))
 163         rel_sz = gh_cdr (rel_sz);
 164     }
 165
 166   for (SCM s = fonts ; gh_pair_p (s); s = gh_cdr (s))
 167     {
 168       SCM qlist = gh_caar (s);
 169
 170       if (name != SCM_BOOL_F)
 171         {
 172           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (4)), name))
 173             continue;
 174         }
 175       else
 176         {
 177           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (1)), series))
 178             continue;
 179           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (2)), shape))
 180             continue;
 181           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (3)), family))
 182             continue;
 183         }
 184
 185       if (point_sz != SCM_BOOL_F)
 186         {
 187           // This if statement will always be true since name must
 188           // be SCM_BOOL_F here, right?  /MB
 189           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (4)), name))
 190             continue;
 191         }
 192       else
 193         {
 194           if (!wild_compare(gh_car (qlist), rel_sz))
 195             continue;
 196         }
 197
 198
 199       SCM qname = gh_cdar (s);
 200       return qname;
 201     }
 202
 203   warning (_("couldn't find any font satisfying ") );
 204   scm_write (gh_list (name, point_sz, shape, series , family, rel_sz, SCM_UNDEFINED), scm_current_error_port ());
 205   scm_flush(scm_current_error_port ());
 206
 207   return ly_str02scm ("cmr10");
 208
 209 }