lily/lookup.cc

   1 /*
   2   lookup.cc -- implement simple Lookup methods.
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8   Jan Nieuwenhuizen <janneke@gnu.org>
   9
  10   TODO
  11       Glissando
  12 */
  13 #include <math.h>
  14 #include <ctype.h>
  15
  16 #include "warn.hh"
  17 #include "dimensions.hh"
  18 #include "bezier.hh"
  19 #include "string-convert.hh"
  20 #include "file-path.hh"
  21 #include "main.hh"
  22 #include "lily-guile.hh"
  23 #include "molecule.hh"
  24 #include "lookup.hh"
  25 #include "font-metric.hh"
  26
  27 Molecule
  28 Lookup::beam (Real slope, Real width, Real thick)
  29 {
  30   Real height = slope * width;
  31   Real min_y = (0 <? height) - thick/2;
  32   Real max_y = (0 >? height) + thick/2;
  33
  34
  35
  36   Box b (Interval (0, width),
  37          Interval (min_y, max_y));
  38
  39
  40   SCM at = gh_list (ly_symbol2scm ("beam"),
  41                     gh_double2scm (width),
  42                     gh_double2scm (slope),
  43                     gh_double2scm (thick),
  44                     SCM_UNDEFINED);
  45   return Molecule (b, at);
  46 }
  47
  48
  49
  50 Molecule
  51 Lookup::dashed_slur (Bezier b, Real thick, Real dash)
  52 {
  53   SCM l = SCM_EOL;
  54
  55   for (int i= 4; i -- ;)
  56     {
  57       l = gh_cons (ly_offset2scm (b.control_[i]), l);
  58     }
  59
  60   SCM at = (gh_list (ly_symbol2scm ("dashed-slur"),
  61                                gh_double2scm (thick),
  62                                gh_double2scm (dash),
  63                                ly_quote_scm (l),
  64                                SCM_UNDEFINED));
  65
  66   Box box (Interval (0,0),Interval (0,0));
  67   return   Molecule (box, at);
  68 }
  69
  70
  71
  72
  73 Molecule
  74 Lookup::blank (Box b)
  75 {
  76   return Molecule (b, SCM_EOL);
  77 }
  78
  79
  80 Molecule
  81 Lookup::filledbox (Box b)
  82 {
  83   SCM  at  = (gh_list (ly_symbol2scm ("filledbox"),
  84                      gh_double2scm (-b[X_AXIS][LEFT]),
  85                      gh_double2scm (b[X_AXIS][RIGHT]),
  86                      gh_double2scm (-b[Y_AXIS][DOWN]),
  87                      gh_double2scm (b[Y_AXIS][UP]),
  88                      SCM_UNDEFINED));
  89
  90   return Molecule (b,at);
  91 }
  92
  93 Molecule
  94 Lookup::frame (Box b, Real thick)
  95 {
  96   Molecule m;
  97   Direction d = LEFT;
  98   Axis a = X_AXIS;
  99   while (a < NO_AXES)
 100     {
 101       do
 102         {
 103           Axis o = Axis ((a+1)%NO_AXES);
 104
 105           Box edges;
 106           edges[a] = b[a][d] + 0.5 * thick * Interval (-1, 1);
 107           edges[o][DOWN] = b[o][DOWN] - thick/2;
 108           edges[o][UP] = b[o][UP] + thick/2;
 109
 110
 111           m.add_molecule (filledbox (edges));
 112         }
 113       while (flip (&d) != LEFT);
 114     }
 115   return m;
 116
 117 }
 118
 119
 120 /*
 121   Make a smooth curve along the points
 122  */
 123 Molecule
 124 Lookup::slur (Bezier curve, Real curvethick, Real linethick)
 125 {
 126   Real alpha = (curve.control_[3] - curve.control_[0]).arg ();
 127   Bezier back = curve;
 128
 129   back.reverse ();
 130   back.control_[1] += curvethick * complex_exp (Offset (0, alpha + M_PI/2));
 131   back.control_[2] += curvethick * complex_exp (Offset (0, alpha + M_PI/2));
 132
 133   SCM scontrols[8];
 134
 135   for (int i=4; i--;)
 136     scontrols[ i ] = ly_offset2scm (back.control_[i]);
 137   for (int i=4 ; i--;)
 138     scontrols[i+4] = ly_offset2scm (curve.control_[i]);
 139
 140   /*
 141     Need the weird order b.o. the way PS want its arguments
 142    */
 143   int indices[]= {5, 6, 7, 4, 1, 2, 3, 0};
 144   SCM list = SCM_EOL;
 145   for (int i= 8; i--;)
 146     {
 147       list = gh_cons (scontrols[indices[i]], list);
 148     }
 149
 150
 151   SCM at = (gh_list (ly_symbol2scm ("bezier-sandwich"),
 152                      ly_quote_scm (list),
 153                      gh_double2scm (linethick),
 154                      SCM_UNDEFINED));
 155
 156   Box b (curve.extent (X_AXIS), curve.extent (Y_AXIS));
 157   return Molecule (b, at);
 158 }
 159
 160 Molecule
 161 Lookup::accordion (SCM s, Real staff_space, Font_metric *fm)
 162 {
 163   Molecule m;
 164   String sym = ly_scm2string (gh_car (s));
 165   String reg = ly_scm2string (gh_car (gh_cdr (s)));
 166
 167   if (sym == "Discant")
 168     {
 169       Molecule r = fm->find_by_name ("accordion-accDiscant");
 170       m.add_molecule (r);
 171       if (reg.left_str (1) == "F")
 172         {
 173           Molecule d = fm->find_by_name ("accordion-accDot");
 174           d.translate_axis (staff_space * 2.5 PT, Y_AXIS);
 175           m.add_molecule (d);
 176           reg = reg.right_str (reg.length_i ()-1);
 177         }
 178       int eflag = 0x00;
 179       if (reg.left_str (3) == "EEE")
 180         {
 181           eflag = 0x07;
 182           reg = reg.right_str (reg.length_i ()-3);
 183         }
 184       else if (reg.left_str (2) == "EE")
 185         {
 186           eflag = 0x05;
 187           reg = reg.right_str (reg.length_i ()-2);
 188         }
 189       else if (reg.left_str (2) == "Eh")
 190         {
 191           eflag = 0x04;
 192           reg = reg.right_str (reg.length_i ()-2);
 193         }
 194       else if (reg.left_str (1) == "E")
 195         {
 196           eflag = 0x02;
 197           reg = reg.right_str (reg.length_i ()-1);
 198         }
 199       if (eflag & 0x02)
 200         {
 201           Molecule d = fm->find_by_name ("accordion-accDot");
 202           d.translate_axis (staff_space * 1.5 PT, Y_AXIS);
 203           m.add_molecule (d);
 204         }
 205       if (eflag & 0x04)
 206         {
 207           Molecule d = fm->find_by_name ("accordion-accDot");
 208           d.translate_axis (staff_space * 1.5 PT, Y_AXIS);
 209           d.translate_axis (0.8 * staff_space PT, X_AXIS);
 210           m.add_molecule (d);
 211         }
 212       if (eflag & 0x01)
 213         {
 214           Molecule d = fm->find_by_name ("accordion-accDot");
 215           d.translate_axis (staff_space * 1.5 PT, Y_AXIS);
 216           d.translate_axis (-0.8 * staff_space PT, X_AXIS);
 217           m.add_molecule (d);
 218         }
 219       if (reg.left_str (2) == "SS")
 220         {
 221           Molecule d = fm->find_by_name ("accordion-accDot");
 222           d.translate_axis (0.5 * staff_space PT, Y_AXIS);
 223           d.translate_axis (0.4 * staff_space PT, X_AXIS);
 224           m.add_molecule (d);
 225           d.translate_axis (-0.8 * staff_space PT, X_AXIS);
 226           m.add_molecule (d);
 227           reg = reg.right_str (reg.length_i ()-2);
 228         }
 229       if (reg.left_str (1) == "S")
 230         {
 231           Molecule d = fm->find_by_name ("accordion-accDot");
 232           d.translate_axis (0.5 * staff_space PT, Y_AXIS);
 233           m.add_molecule (d);
 234           reg = reg.right_str (reg.length_i ()-1);
 235         }
 236     }
 237   else if (sym == "Freebase")
 238     {
 239       Molecule r = fm->find_by_name ("accordion-accFreebase");
 240       m.add_molecule (r);
 241       if (reg.left_str (1) == "F")
 242         {
 243           Molecule d = fm->find_by_name ("accordion-accDot");
 244           d.translate_axis (staff_space * 1.5 PT, Y_AXIS);
 245           m.add_molecule (d);
 246           reg = reg.right_str (reg.length_i ()-1);
 247         }
 248       if (reg == "E")
 249         {
 250           Molecule d = fm->find_by_name ("accordion-accDot");
 251           d.translate_axis (staff_space * 0.5 PT, Y_AXIS);
 252           m.add_molecule (d);
 253         }
 254     }
 255   else if (sym == "Bayanbase")
 256     {
 257       Molecule r = fm->find_by_name ("accordion-accBayanbase");
 258       m.add_molecule (r);
 259       if (reg.left_str (1) == "T")
 260         {
 261           Molecule d = fm->find_by_name ("accordion-accDot");
 262           d.translate_axis (staff_space * 2.5 PT, Y_AXIS);
 263           m.add_molecule (d);
 264           reg = reg.right_str (reg.length_i ()-1);
 265         }
 266       /* include 4' reed just for completeness. You don't want to use this. */
 267       if (reg.left_str (1) == "F")
 268         {
 269           Molecule d = fm->find_by_name ("accordion-accDot");
 270           d.translate_axis (staff_space * 1.5 PT, Y_AXIS);
 271           m.add_molecule (d);
 272           reg = reg.right_str (reg.length_i ()-1);
 273         }
 274       if (reg.left_str (2) == "EE")
 275         {
 276           Molecule d = fm->find_by_name ("accordion-accDot");
 277           d.translate_axis (staff_space * 0.5 PT, Y_AXIS);
 278           d.translate_axis (0.4 * staff_space PT, X_AXIS);
 279           m.add_molecule (d);
 280           d.translate_axis (-0.8 * staff_space PT, X_AXIS);
 281           m.add_molecule (d);
 282           reg = reg.right_str (reg.length_i ()-2);
 283         }
 284       if (reg.left_str (1) == "E")
 285         {
 286           Molecule d = fm->find_by_name ("accordion-accDot");
 287           d.translate_axis (staff_space * 0.5 PT, Y_AXIS);
 288           m.add_molecule (d);
 289           reg = reg.right_str (reg.length_i ()-1);
 290         }
 291     }
 292   else if (sym == "Stdbase")
 293     {
 294       Molecule r = fm->find_by_name ("accordion-accStdbase");
 295       m.add_molecule (r);
 296       if (reg.left_str (1) == "T")
 297         {
 298           Molecule d = fm->find_by_name ("accordion-accDot");
 299           d.translate_axis (staff_space * 3.5 PT, Y_AXIS);
 300           m.add_molecule (d);
 301           reg = reg.right_str (reg.length_i ()-1);
 302         }
 303       if (reg.left_str (1) == "F")
 304         {
 305           Molecule d = fm->find_by_name ("accordion-accDot");
 306           d.translate_axis (staff_space * 2.5 PT, Y_AXIS);
 307           m.add_molecule (d);
 308           reg = reg.right_str (reg.length_i ()-1);
 309         }
 310       if (reg.left_str (1) == "M")
 311         {
 312           Molecule d = fm->find_by_name ("accordion-accDot");
 313           d.translate_axis (staff_space * 2 PT, Y_AXIS);
 314           d.translate_axis (staff_space PT, X_AXIS);
 315           m.add_molecule (d);
 316           reg = reg.right_str (reg.length_i ()-1);
 317         }
 318       if (reg.left_str (1) == "E")
 319         {
 320           Molecule d = fm->find_by_name ("accordion-accDot");
 321           d.translate_axis (staff_space * 1.5 PT, Y_AXIS);
 322           m.add_molecule (d);
 323           reg = reg.right_str (reg.length_i ()-1);
 324         }
 325       if (reg.left_str (1) == "S")
 326         {
 327           Molecule d = fm->find_by_name ("accordion-accDot");
 328           d.translate_axis (staff_space * 0.5 PT, Y_AXIS);
 329           m.add_molecule (d);
 330           reg = reg.right_str (reg.length_i ()-1);
 331         }
 332     }
 333   /* ugh maybe try to use regular font for S.B. and B.B and only use one font
 334      for the rectangle */
 335   else if (sym == "SB")
 336     {
 337       Molecule r = fm->find_by_name ("accordion-accSB");
 338       m.add_molecule (r);
 339     }
 340   else if (sym == "BB")
 341     {
 342       Molecule r = fm->find_by_name ("accordion-accBB");
 343       m.add_molecule (r);
 344     }
 345   else if (sym == "OldEE")
 346     {
 347       Molecule r = fm->find_by_name ("accordion-accOldEE");
 348       m.add_molecule (r);
 349     }
 350   else if (sym == "OldEES")
 351     {
 352       Molecule r = fm->find_by_name ("accordion-accOldEES");
 353       m.add_molecule (r);
 354     }
 355   return m;
 356 }
 357
 358 /*
 359   TODO: should use slope instead?  Angle gives nasty rad <-> degree
 360   conversions.
 361 */
 362 Molecule
 363 Lookup::repeat_slash (Real w, Real s, Real t)
 364 {
 365   SCM wid = gh_double2scm (w);
 366   SCM sl = gh_double2scm (s);
 367   SCM thick = gh_double2scm (t);
 368   SCM slashnodot = gh_list (ly_symbol2scm ("repeat-slash"),
 369                             wid, sl, thick, SCM_UNDEFINED);
 370
 371   Box b (Interval (0, w + sqrt (sqr(t/s) + sqr (t))),
 372          Interval (0, w * s));
 373
 374   return Molecule (b, slashnodot);
 375 }