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
  48 SCM
  49 ly_font_interface_get_default_font (SCM grob)
  50 {
  51   Grob * gr  = unsmob_grob (grob);
  52
  53   if (!gr)
  54     {
  55       warning ("ly_font_interface_get_default_font (): invalid argument");
  56       return SCM_UNDEFINED;
  57     }
  58
  59   return Font_interface::get_default_font (gr)->self_scm ();
  60 }
  61
  62 Font_metric *
  63 Font_interface::get_font (Grob *me, SCM chain)
  64 {
  65
  66   SCM ss = me->paper_l ()->style_sheet_;
  67
  68   SCM proc = gh_cdr (scm_assoc (ly_symbol2scm ("properties-to-font"),
  69                                 ss));
  70
  71   SCM fonts = gh_cdr (scm_assoc (ly_symbol2scm ("fonts"), ss));
  72
  73   assert (gh_procedure_p (proc));
  74   SCM font_name = gh_call2 (proc, fonts, chain);
  75
  76   Font_metric *fm = me->paper_l ()->find_font (font_name, 1.0);
  77   return fm;
  78 }
  79
  80 SCM
  81 Font_interface::add_style (Grob* me, SCM style, SCM chain)
  82 {
  83   assert (gh_symbol_p (style));
  84
  85   SCM sheet = me->paper_l ()->style_sheet_;
  86
  87   SCM style_alist = gh_cdr (scm_assoc (ly_symbol2scm ("style-alist"), sheet));
  88   SCM entry = scm_assoc (style, style_alist);
  89   if (gh_pair_p (entry))
  90     {
  91       chain = gh_cons (gh_cdr (entry), chain);
  92     }
  93   return chain;
  94 }
  95
  96 /*
  97 SCM routines:
  98
  99 Interpreting music...
 100 MIDI output to wtk1-fugue2.midi...
 101 Track ...
 102
 103 real    0m31.862s
 104 user    0m29.110s
 105 sys     0m0.260s
 106
 107 real    0m26.964s
 108 user    0m24.850s
 109 sys     0m0.280s
 110
 111
 112 so a 14% speedup.
 113
 114 */
 115
 116 static SCM name_sym, shape_sym, family_sym, series_sym, rel_sz_sym, pt_sz_sym, wild_sym;
 117
 118
 119 static void
 120 init_syms ()
 121 {
 122   name_sym = scm_permanent_object (ly_symbol2scm ("font-name"));
 123   shape_sym  = scm_permanent_object (ly_symbol2scm ("font-shape"));
 124   family_sym = scm_permanent_object (ly_symbol2scm ("font-family"));
 125   series_sym = scm_permanent_object (ly_symbol2scm ("font-series"));
 126   rel_sz_sym = scm_permanent_object (ly_symbol2scm ("font-relative-size"));
 127   pt_sz_sym = scm_permanent_object (ly_symbol2scm ("font-point-size"));
 128   wild_sym = scm_permanent_object (ly_symbol2scm ("*"));
 129
 130   scm_make_gsubr ("ly-get-default-font", 1 , 0, 0, (Scheme_function_unknown) ly_font_interface_get_default_font);
 131 }
 132
 133
 134 bool
 135 Font_interface::wild_compare(SCM field_val, SCM val)
 136 {
 137   return (val == SCM_BOOL_F || field_val == wild_sym || field_val == val);
 138 }
 139
 140 ADD_SCM_INIT_FUNC(Font_interface_syms,init_syms);
 141
 142
 143 MAKE_SCHEME_CALLBACK(Font_interface,properties_to_font_name,2);
 144 SCM
 145 Font_interface::properties_to_font_name (SCM fonts, SCM alist_chain)
 146 {
 147   SCM name = ly_assoc_chain (name_sym, alist_chain);
 148
 149   SCM shape = SCM_BOOL_F;
 150   SCM family = SCM_BOOL_F;
 151   SCM series = SCM_BOOL_F;
 152
 153
 154   SCM point_sz = ly_assoc_chain (pt_sz_sym, alist_chain);
 155   SCM rel_sz = SCM_BOOL_F;
 156
 157   if (!gh_pair_p (name))
 158     {
 159        shape = ly_assoc_chain (shape_sym, alist_chain);
 160        family = ly_assoc_chain (family_sym, alist_chain);
 161        series = ly_assoc_chain (series_sym, alist_chain);
 162
 163        if (gh_pair_p (shape))
 164          shape = gh_cdr (shape);
 165        if (gh_pair_p (family))
 166          family = gh_cdr (family);
 167        if (gh_pair_p (series))
 168          series = gh_cdr (series);
 169     }
 170   else
 171     name = gh_cdr (name);
 172
 173
 174   if (gh_pair_p (point_sz))
 175     point_sz = gh_cdr (point_sz);
 176   else
 177     {
 178       rel_sz = ly_assoc_chain (rel_sz_sym, alist_chain);
 179       if (gh_pair_p (rel_sz))
 180         rel_sz = gh_cdr (rel_sz);
 181     }
 182
 183   for (SCM s = fonts ; gh_pair_p (s); s = gh_cdr (s))
 184     {
 185       SCM qlist = gh_caar (s);
 186
 187       if (name != SCM_BOOL_F)
 188         {
 189           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (4)), name))
 190             continue;
 191         }
 192       else
 193         {
 194           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (1)), series))
 195             continue;
 196           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (2)), shape))
 197             continue;
 198           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (3)), family))
 199             continue;
 200         }
 201
 202       if (point_sz != SCM_BOOL_F)
 203         {
 204           // This if statement will always be true since name must
 205           // be SCM_BOOL_F here, right?  /MB
 206           if (!wild_compare(scm_list_ref (qlist, gh_int2scm (4)), name))
 207             continue;
 208         }
 209       else
 210         {
 211           if (!wild_compare(gh_car (qlist), rel_sz))
 212             continue;
 213         }
 214
 215
 216       SCM qname = gh_cdar (s);
 217       return qname;
 218     }
 219
 220   warning (_("couldn't find any font satisfying ") );
 221   scm_write (gh_list (name, point_sz, shape, series , family, rel_sz, SCM_UNDEFINED), scm_current_error_port ());
 222   scm_flush(scm_current_error_port ());
 223
 224   return ly_str02scm ("cmr10");
 225
 226 }