| 1 | |
| 2 | /* Copyright (c) 1995, 1996, 1997, 1998, 2000, 2002, 2004 by Arkkra Enterprises */ |
| 3 | /* All rights reserved */ |
| 4 | |
| 5 | /* functions to deal with rolls. This includes both parse phase and print |
| 6 | * phase code for rolls. */ |
| 7 | |
| 8 | #include "defines.h" |
| 9 | #include "structs.h" |
| 10 | #include "globals.h" |
| 11 | |
| 12 | |
| 13 | |
| 14 | /* each "roll" input statement can have multiple beat offsets to specify |
| 15 | * more than one roll. This is a linked list struct to hold these offsets */ |
| 16 | struct ROLLOFFSET { |
| 17 | float offset; /* beat offset where roll is */ |
| 18 | struct ROLLOFFSET *next; /* linked list */ |
| 19 | }; |
| 20 | |
| 21 | |
| 22 | /* struct to hold all needed info about a roll input statement */ |
| 23 | struct ROLLINFO { |
| 24 | short topstaff; /* roll goes from here */ |
| 25 | short topvoice; |
| 26 | short botstaff; /* roll ends here */ |
| 27 | short botvoice; |
| 28 | short rolldir; /* UP, DOWN, or UNKNOWN. UNKNOWN really means |
| 29 | * UP but with no arrow drawn (the default) */ |
| 30 | short error; /* YES if got bad value for some parameter */ |
| 31 | int lineno; /* input line number where defined */ |
| 32 | char *inputfile; /* input file where defined */ |
| 33 | struct ROLLOFFSET *offsets_p; /* list of beat offsets */ |
| 34 | struct ROLLINFO *next; /* linked list */ |
| 35 | }; |
| 36 | |
| 37 | static struct ROLLINFO *Roll_list_p; /* rolls defined in current measure */ |
| 38 | /* rolls are linked to the head of this list, so this pointer |
| 39 | * will point to the roll currently being defined */ |
| 40 | |
| 41 | |
| 42 | /* static functions declarations */ |
| 43 | static void do_a_roll P((struct ROLLINFO *roll_p, struct MAINLL *mll_p)); |
| 44 | static void roll P((struct MAINLL * mll_p, struct ROLLINFO *roll_p, |
| 45 | struct ROLLOFFSET * offset_p)); |
| 46 | static void set_roll P((struct GRPSYL *gs_p, int item, |
| 47 | struct ROLLINFO *roll_p)); |
| 48 | static void draw_roll P((double x, double y1, double y2, int rolldir)); |
| 49 | |
| 50 | \f |
| 51 | |
| 52 | /* allocate struct for info about roll, and add to list */ |
| 53 | |
| 54 | void |
| 55 | newROLLINFO() |
| 56 | |
| 57 | { |
| 58 | struct ROLLINFO *roll_p; /* newly allocated roll info */ |
| 59 | |
| 60 | |
| 61 | MALLOC(ROLLINFO, roll_p, 1); |
| 62 | |
| 63 | roll_p->offsets_p = (struct ROLLOFFSET *) 0; |
| 64 | /* assume direction will be up, but with no direction arrow */ |
| 65 | roll_p->rolldir = UNKNOWN; |
| 66 | /* incomplete info so far, so mark as in error */ |
| 67 | roll_p->error = YES; |
| 68 | |
| 69 | /* link onto head of list */ |
| 70 | roll_p->next = Roll_list_p; |
| 71 | Roll_list_p = roll_p; |
| 72 | |
| 73 | roll_p->lineno = yylineno; |
| 74 | roll_p->inputfile = Curr_filename; |
| 75 | } |
| 76 | \f |
| 77 | |
| 78 | /* alter the roll direction (default is UNKNOWN) */ |
| 79 | |
| 80 | void |
| 81 | setrolldir(int dir) |
| 82 | |
| 83 | { |
| 84 | Roll_list_p->rolldir = dir; |
| 85 | } |
| 86 | \f |
| 87 | |
| 88 | /* set roll parameters. Any parameter that is -1 should be left as is. |
| 89 | * Others should be error checked, and if okay, filled in */ |
| 90 | /* Must be called once to fill in the top staff and voice. At that point, |
| 91 | * the bottom staff and voice are assummed to be the same as the top. |
| 92 | * If they aren't, this function should be called again |
| 93 | * with the bottom parameters set |
| 94 | * to a non-negative number and the top parameters set to -1 */ |
| 95 | |
| 96 | void |
| 97 | rollparam(topstaff, topvoice, botstaff, botvoice) |
| 98 | |
| 99 | int topstaff; /* top of roll is here */ |
| 100 | int topvoice; |
| 101 | int botstaff; /* bottom of roll is here */ |
| 102 | int botvoice; |
| 103 | |
| 104 | { |
| 105 | /* we now have enough info to check, so assume it's okay, then check */ |
| 106 | Roll_list_p->error = NO; |
| 107 | |
| 108 | /* for each value, if being set, error check and save away if okay. |
| 109 | * If no good, set error flag */ |
| 110 | if (topstaff >= 0) { |
| 111 | if (rangecheck(topstaff, 1, Score.staffs, "staff number") |
| 112 | == NO) { |
| 113 | Roll_list_p->error = YES; |
| 114 | } |
| 115 | Roll_list_p->topstaff = Roll_list_p->botstaff |
| 116 | = (short) topstaff; |
| 117 | } |
| 118 | |
| 119 | if (topvoice >= 0) { |
| 120 | if (rangecheck(topvoice, MINVOICES, NORMVOICES, "roll voice number") |
| 121 | == NO) { |
| 122 | Roll_list_p->error = YES; |
| 123 | } |
| 124 | Roll_list_p->topvoice = Roll_list_p->botvoice |
| 125 | = (short) topvoice; |
| 126 | } |
| 127 | |
| 128 | if (botstaff >= 0) { |
| 129 | if (rangecheck(botstaff, 1, Score.staffs, "ending staff number") |
| 130 | == NO) { |
| 131 | Roll_list_p->error = YES; |
| 132 | } |
| 133 | Roll_list_p->botstaff = (short) botstaff; |
| 134 | } |
| 135 | |
| 136 | if (botvoice >= 0) { |
| 137 | if (rangecheck(botvoice, MINVOICES, NORMVOICES, |
| 138 | "ending voice number") == NO) { |
| 139 | Roll_list_p->error = YES; |
| 140 | } |
| 141 | Roll_list_p->botvoice = (short) botvoice; |
| 142 | } |
| 143 | |
| 144 | if (Roll_list_p->topstaff > Roll_list_p->botstaff || |
| 145 | (Roll_list_p->topstaff == Roll_list_p->botstaff |
| 146 | && Roll_list_p->topvoice > Roll_list_p->botvoice)) { |
| 147 | yyerror("end of roll must be below beginning of roll"); |
| 148 | Roll_list_p->error = YES; |
| 149 | } |
| 150 | } |
| 151 | \f |
| 152 | |
| 153 | /* allocate space for offset information, fill it in, and link onto current |
| 154 | * roll information struct */ |
| 155 | |
| 156 | void |
| 157 | rolloffset(offset) |
| 158 | |
| 159 | double offset; /* count offset where roll is to go */ |
| 160 | |
| 161 | { |
| 162 | struct ROLLOFFSET *offset_p; /* where to save offset info */ |
| 163 | |
| 164 | |
| 165 | /* error check */ |
| 166 | if (offset > Score.timenum + 1) { |
| 167 | yyerror("roll offset beyond end of measure"); |
| 168 | Roll_list_p->error = YES; |
| 169 | return; |
| 170 | } |
| 171 | |
| 172 | /* allocate */ |
| 173 | MALLOC(ROLLOFFSET, offset_p, 1); |
| 174 | |
| 175 | /* fill in */ |
| 176 | offset_p->offset = offset; |
| 177 | |
| 178 | /* link to list */ |
| 179 | offset_p->next = Roll_list_p->offsets_p; |
| 180 | Roll_list_p->offsets_p = offset_p; |
| 181 | } |
| 182 | \f |
| 183 | |
| 184 | /* at end of bar, do each roll. For each roll, find closest group of |
| 185 | * top and bottom voice of roll. If they aren't at precisely the same |
| 186 | * fulltime into the measure, error. Otherwise, mark these groups STARTITEM and |
| 187 | * ENDITEM for roll, unless they are the same, in which case LONEITEM. |
| 188 | * Also find any intervening groups that are also at the same fulltime. |
| 189 | * Mark them INITEM. Finally, free the roll information. */ |
| 190 | |
| 191 | void |
| 192 | do_rolls(mll_p) |
| 193 | |
| 194 | struct MAINLL *mll_p; /* MAINLL of BAR */ |
| 195 | |
| 196 | { |
| 197 | debug(4, "do_rolls lineno=%d", mll_p->inputlineno); |
| 198 | |
| 199 | do_a_roll(Roll_list_p, mll_p); |
| 200 | Roll_list_p = (struct ROLLINFO *) 0; |
| 201 | } |
| 202 | \f |
| 203 | |
| 204 | /* recursively go down list of rolls, and mark the relevant GRPSYLs */ |
| 205 | |
| 206 | static void |
| 207 | do_a_roll(roll_p, mll_p) |
| 208 | |
| 209 | struct ROLLINFO *roll_p; /* current roll */ |
| 210 | struct MAINLL *mll_p; /* look from here to find appropriate staff */ |
| 211 | |
| 212 | { |
| 213 | if (roll_p == (struct ROLLINFO *) 0) { |
| 214 | /* end recursion */ |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | /* recurse */ |
| 219 | do_a_roll(roll_p->next, mll_p); |
| 220 | |
| 221 | /* if error in early checking, ignore this one */ |
| 222 | if (roll_p->error == NO) { |
| 223 | |
| 224 | /* find the relevant STAFF */ |
| 225 | for ( ; mll_p != (struct MAINLL *) 0; mll_p = mll_p->prev) { |
| 226 | if (mll_p->str == S_STAFF) { |
| 227 | if (mll_p->u.staff_p->staffno == |
| 228 | roll_p->topstaff) { |
| 229 | break; |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | if (mll_p == (struct MAINLL *) 0) { |
| 235 | pfatal("couldn't find staff information for roll"); |
| 236 | } |
| 237 | |
| 238 | /* mark the GRPSYLs */ |
| 239 | roll(mll_p, roll_p, roll_p->offsets_p); |
| 240 | } |
| 241 | |
| 242 | /* this one has been handled */ |
| 243 | FREE(roll_p); |
| 244 | } |
| 245 | \f |
| 246 | |
| 247 | /* for a specific roll on a specific chord, fill in the roll parameters for |
| 248 | * all affected, visible groups */ |
| 249 | |
| 250 | static void |
| 251 | roll(mll_p, roll_p, offset_p) |
| 252 | |
| 253 | struct MAINLL *mll_p; /* STAFF of top of roll */ |
| 254 | struct ROLLINFO *roll_p; /* info about the roll */ |
| 255 | struct ROLLOFFSET *offset_p; /* count offset at which to place roll */ |
| 256 | |
| 257 | { |
| 258 | RATIONAL timeoffset; /* time into measure of group getting rolled */ |
| 259 | RATIONAL time1offset; /* timeoffset of group in top voice of roll */ |
| 260 | struct GRPSYL *gs_p; |
| 261 | struct GRPSYL *roll_grp_p; /* group having roll */ |
| 262 | struct GRPSYL *lastvisgrp_p; /* most recent grp with roll that is |
| 263 | * on a visible staff */ |
| 264 | int rollstate; /* STARTITEM, etc */ |
| 265 | int staffno; |
| 266 | int voice; |
| 267 | double top_staffscale; /* staffscale of staff at top of roll */ |
| 268 | |
| 269 | |
| 270 | /* recurse */ |
| 271 | if (offset_p == (struct ROLLOFFSET *) 0) { |
| 272 | return; |
| 273 | } |
| 274 | roll(mll_p, roll_p, offset_p->next); |
| 275 | |
| 276 | |
| 277 | /* find relevant group */ |
| 278 | gs_p = mll_p->u.staff_p->groups_p [ roll_p->topvoice - 1 ]; |
| 279 | roll_grp_p = closestgroup(offset_p->offset, gs_p, Score.timeden); |
| 280 | |
| 281 | if (roll_grp_p->roll != NOITEM) { |
| 282 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 283 | "overlapping rolls not allowed"); |
| 284 | FREE(offset_p); |
| 285 | return; |
| 286 | } |
| 287 | |
| 288 | /* a lot of the time, the top and bottom staff/voice of roll will |
| 289 | * be the same, meaning we have a LONEITEM. This is the easy case |
| 290 | * so handle that. */ |
| 291 | if (roll_p->topstaff == roll_p->botstaff |
| 292 | && roll_p->topvoice == roll_p->botvoice) { |
| 293 | if (svpath(roll_p->topstaff, VISIBLE)->visible == YES) { |
| 294 | set_roll(roll_grp_p, LONEITEM, roll_p); |
| 295 | } |
| 296 | FREE(offset_p); |
| 297 | return; |
| 298 | } |
| 299 | |
| 300 | /* we must have a roll that encompasses more than one voice */ |
| 301 | lastvisgrp_p = (struct GRPSYL *) 0; |
| 302 | |
| 303 | /* find group's actual RATIONAL time offset into the measure */ |
| 304 | for (time1offset = Zero; gs_p != roll_grp_p; gs_p = gs_p->next) { |
| 305 | time1offset = radd(time1offset, gs_p->fulltime); |
| 306 | } |
| 307 | |
| 308 | /* if the top voice is visible, mark it as the top of the roll. |
| 309 | * If not, make a note that we don't have a real top yet */ |
| 310 | if (svpath(roll_p->topstaff, VISIBLE)->visible == YES) { |
| 311 | if (is_tab_staff(roll_grp_p->staffno) == YES) { |
| 312 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 313 | "roll spanning multiple voices cannot include tab staff"); |
| 314 | return; |
| 315 | } |
| 316 | set_roll(roll_grp_p, STARTITEM, roll_p); |
| 317 | rollstate = INITEM; |
| 318 | lastvisgrp_p = roll_grp_p; |
| 319 | } |
| 320 | else { |
| 321 | rollstate = STARTITEM; |
| 322 | } |
| 323 | |
| 324 | staffno = roll_p->topstaff; |
| 325 | voice = roll_p->topvoice; |
| 326 | top_staffscale = svpath(staffno, STAFFSCALE)->staffscale; |
| 327 | |
| 328 | /* find all groups down to ending of roll */ |
| 329 | for ( ; ; ) { |
| 330 | |
| 331 | /* move to next voice, which may be on next staff */ |
| 332 | if (++voice > MAXVOICES) { |
| 333 | ++staffno; |
| 334 | voice = 1; |
| 335 | mll_p = mll_p->next; |
| 336 | if (mll_p->str != S_STAFF || |
| 337 | mll_p->u.staff_p->staffno != staffno) { |
| 338 | pfatal("main list messed up while doing rolls"); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /* if no more voices on staff, no reason to check more */ |
| 343 | if (voice > vscheme_voices(svpath(staffno, VSCHEME)->vscheme)) { |
| 344 | continue; |
| 345 | } |
| 346 | |
| 347 | /* find relevant group */ |
| 348 | gs_p = mll_p->u.staff_p->groups_p[ voice - 1]; |
| 349 | roll_grp_p = closestgroup(offset_p->offset, gs_p, Score.timeden); |
| 350 | |
| 351 | if (is_tab_staff(roll_grp_p->staffno) == YES) { |
| 352 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 353 | "roll spanning multiple voices cannot include tab staff"); |
| 354 | return; |
| 355 | } |
| 356 | |
| 357 | if (svpath(roll_grp_p->staffno, STAFFSCALE)->staffscale != |
| 358 | top_staffscale) { |
| 359 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 360 | "roll cannot span staffs with differing staffscale values"); |
| 361 | return; |
| 362 | } |
| 363 | |
| 364 | if (roll_grp_p == (struct GRPSYL *) 0) { |
| 365 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 366 | "no chord associated with roll"); |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | /* find group's actual RATIONAL time offset into the measure */ |
| 371 | for (timeoffset = Zero; gs_p != roll_grp_p; gs_p = gs_p->next) { |
| 372 | timeoffset = radd(timeoffset, gs_p->fulltime); |
| 373 | } |
| 374 | |
| 375 | /* if this group's RATIONAL time isn't the same as |
| 376 | * the top group's, it doesn't get included in the roll */ |
| 377 | if (EQ(timeoffset, time1offset)) { |
| 378 | /* need roll on this group */ |
| 379 | if (roll_grp_p->grpcont == GC_NOTES) { |
| 380 | set_roll(roll_grp_p, rollstate, roll_p); |
| 381 | rollstate = INITEM; |
| 382 | if (svpath(staffno, VISIBLE)->visible == YES) { |
| 383 | lastvisgrp_p = roll_grp_p; |
| 384 | } |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /* check if at bottom of roll */ |
| 389 | if (staffno == roll_p->botstaff && voice == roll_p->botvoice) { |
| 390 | if (NE(timeoffset, time1offset)) { |
| 391 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 392 | "groups on top and bottom of roll are in different chords"); |
| 393 | } |
| 394 | else if (svpath(staffno, VISIBLE)->visible == NO) { |
| 395 | /* bottom staff of roll is invisible */ |
| 396 | if (lastvisgrp_p == (struct GRPSYL *) 0) { |
| 397 | /* no visible staffs in roll */ |
| 398 | break; |
| 399 | } |
| 400 | |
| 401 | /* change last visible staff included in the |
| 402 | * roll, to be the end of the roll, or |
| 403 | * set to LONEITEM if only visible */ |
| 404 | if (lastvisgrp_p->roll == STARTITEM) { |
| 405 | lastvisgrp_p->roll = LONEITEM; |
| 406 | } |
| 407 | else { |
| 408 | lastvisgrp_p->roll = ENDITEM; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | else if (lastvisgrp_p->roll == STARTITEM) { |
| 413 | /* all but the last were invisible */ |
| 414 | roll_grp_p->roll = LONEITEM; |
| 415 | } |
| 416 | else { |
| 417 | roll_grp_p->roll = ENDITEM; |
| 418 | } |
| 419 | break; |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | /* this one has been handled */ |
| 424 | FREE(offset_p); |
| 425 | } |
| 426 | \f |
| 427 | |
| 428 | /* do final checking and actually fill in roll parameters in grpsyl */ |
| 429 | |
| 430 | static void |
| 431 | set_roll(gs_p, item, roll_p) |
| 432 | |
| 433 | struct GRPSYL *gs_p; /* which GRPSYL to mark */ |
| 434 | int item; /* LONEITEM, STARTITEM, etc */ |
| 435 | struct ROLLINFO *roll_p; /* info about roll associated with group */ |
| 436 | |
| 437 | { |
| 438 | if (gs_p->grpcont != GC_NOTES) { |
| 439 | switch (item) { |
| 440 | case STARTITEM: |
| 441 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 442 | "top visible chord of roll must not be rest or space"); |
| 443 | return; |
| 444 | case ENDITEM: |
| 445 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 446 | "bottom visible chord of roll must not be rest or space"); |
| 447 | return; |
| 448 | case LONEITEM: |
| 449 | l_yyerror(roll_p->inputfile, roll_p->lineno, |
| 450 | "rolled chord must not be rest or space"); |
| 451 | return; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | /* fill in values */ |
| 456 | gs_p->roll = (short) item; |
| 457 | gs_p->rolldir = roll_p->rolldir; |
| 458 | } |
| 459 | \f |
| 460 | |
| 461 | /* print a roll */ |
| 462 | |
| 463 | void |
| 464 | print_roll(gs_p) |
| 465 | |
| 466 | struct GRPSYL *gs_p; /* GRPSYL that might have a roll on it */ |
| 467 | |
| 468 | { |
| 469 | struct GRPSYL *botgs_p; /* bottom group of roll */ |
| 470 | struct GRPSYL *prevgs_p; /* chord above current chord */ |
| 471 | float north; |
| 472 | float south; |
| 473 | float westmost; /* if voices overlap, the west of |
| 474 | * different groups in the chord may |
| 475 | * be different, so have to find |
| 476 | * whichever is farther west */ |
| 477 | |
| 478 | switch (gs_p->roll) { |
| 479 | |
| 480 | case LONEITEM: |
| 481 | draw_roll(gs_p->c[AW] + ROLLPADDING * Staffscale / 2.0, |
| 482 | gs_p->notelist[0].c[AN], |
| 483 | gs_p->notelist[ gs_p->nnotes - 1].c[AS], |
| 484 | gs_p->rolldir); |
| 485 | return; |
| 486 | |
| 487 | case STARTITEM: |
| 488 | /* normally, the north of the roll is the north of the top |
| 489 | * group. However, there is one special case. If the roll |
| 490 | * starts on voice 1 and goes through voice 2 on that staff, |
| 491 | * and the top note on voice 2 is higher than the top note |
| 492 | * on voice 1, need to start roll at the top note of voice 2 */ |
| 493 | north = gs_p->notelist[0].c[AN]; |
| 494 | if (gs_p->vno == 1 && gs_p->gs_p != (struct GRPSYL *) 0 && |
| 495 | gs_p->gs_p->staffno == gs_p->staffno && |
| 496 | gs_p->gs_p->grpsyl == GS_GROUP && |
| 497 | gs_p->gs_p->grpcont == GC_NOTES) { |
| 498 | if (gs_p->gs_p->notelist[0].c[AN] > |
| 499 | gs_p->notelist[0].c[AN]) { |
| 500 | north = gs_p->gs_p->notelist[0].c[AN]; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | westmost = gs_p->c[AW]; |
| 505 | |
| 506 | /* find the bottom group of the roll */ |
| 507 | prevgs_p = gs_p; |
| 508 | for (botgs_p = gs_p->gs_p; botgs_p != (struct GRPSYL *) 0; |
| 509 | botgs_p = botgs_p->gs_p) { |
| 510 | |
| 511 | if (botgs_p->grpsyl != GS_SYLLABLE && |
| 512 | botgs_p->c[AW] < westmost) { |
| 513 | westmost = botgs_p->c[AW]; |
| 514 | } |
| 515 | |
| 516 | if (botgs_p->roll == ENDITEM) { |
| 517 | |
| 518 | /* normally, the end of the roll is the bottom |
| 519 | * note of the ending group. However, there is |
| 520 | * one special case. If the roll ends on voice |
| 521 | * 2, and the bottom note of voice 1 is lower |
| 522 | * than the bottom note of voice 1, the south |
| 523 | * of the roll is the bottom of voice 1 */ |
| 524 | south = botgs_p->notelist |
| 525 | [ botgs_p->nnotes - 1].c[AS]; |
| 526 | |
| 527 | if (botgs_p->vno == 2 && prevgs_p->staffno |
| 528 | == botgs_p->staffno && |
| 529 | prevgs_p->grpsyl == GS_GROUP) { |
| 530 | |
| 531 | if (prevgs_p->nnotes > 0 && |
| 532 | prevgs_p->notelist[prevgs_p->nnotes-1].c[AS] |
| 533 | < botgs_p->notelist |
| 534 | [botgs_p->nnotes - 1] |
| 535 | .c[AS]) { |
| 536 | |
| 537 | south = prevgs_p->notelist |
| 538 | [prevgs_p->nnotes - 1] |
| 539 | .c[AS]; |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | draw_roll(westmost + |
| 544 | ROLLPADDING * Staffscale / 2.0, |
| 545 | north, south, gs_p->rolldir); |
| 546 | return; |
| 547 | } |
| 548 | prevgs_p = botgs_p; |
| 549 | } |
| 550 | pfatal("failed to find end of multi-voice roll"); |
| 551 | break; |
| 552 | |
| 553 | default: |
| 554 | /* nothing to do */ |
| 555 | break; |
| 556 | } |
| 557 | } |
| 558 | \f |
| 559 | |
| 560 | /* Actually draw a roll at the given x from y1 to y2. If rolldir is DOWN, |
| 561 | * draw an arrow at the bottom; if it is UP draw an arrow at the top; |
| 562 | * if UNKNOWN don't draw any arrow. */ |
| 563 | |
| 564 | static void |
| 565 | draw_roll(x, y1, y2, rolldir) |
| 566 | |
| 567 | double x; /* horizontal location of roll */ |
| 568 | double y1; /* vertical location */ |
| 569 | double y2; |
| 570 | int rolldir; /* UP, DOWN, or UNKNOWN (i.e., UP but no arrow) */ |
| 571 | |
| 572 | { |
| 573 | /* draw the roll itself */ |
| 574 | draw_wavy(x, y1, x, y2); |
| 575 | |
| 576 | /* If arrow was requested, draw it */ |
| 577 | if (rolldir != UNKNOWN) { |
| 578 | float len; |
| 579 | |
| 580 | /* draw arrow at bottom */ |
| 581 | len = ROLLPADDING * Staffscale / 2.0 - Stdpad; |
| 582 | do_linetype(L_NORMAL); |
| 583 | if (rolldir == DOWN) { |
| 584 | draw_line(x, y2 - Stepsize, x - (0.8 * len), y2 + len); |
| 585 | draw_line(x, y2 - Stepsize, x + (0.8 * len), y2 + len); |
| 586 | } |
| 587 | else { |
| 588 | draw_line(x, y1 + Stepsize, x - (0.8 * len), y1 - len); |
| 589 | draw_line(x, y1 + Stepsize, x + (0.8 * len), y1 - len); |
| 590 | } |
| 591 | } |
| 592 | } |
| 593 | \f |
| 594 | |
| 595 | /* return YES if given group is the top group that gets a roll drawn by it, |
| 596 | * NO if not. This is called from the print phase */ |
| 597 | |
| 598 | int |
| 599 | gets_roll(gs_p, staff_p, v) |
| 600 | |
| 601 | struct GRPSYL *gs_p; /* check if this group gets a roll */ |
| 602 | struct STAFF *staff_p; /* it's connected to this staff */ |
| 603 | int v; /* and is in this voice */ |
| 604 | |
| 605 | { |
| 606 | float width1, width2; /* widest note heads in each group */ |
| 607 | float maxwide; /* widest notehead */ |
| 608 | struct GRPSYL *othergs_p; /* group in other voice */ |
| 609 | |
| 610 | |
| 611 | if (gs_p->roll != STARTITEM && gs_p->roll != LONEITEM) { |
| 612 | return(NO); |
| 613 | } |
| 614 | |
| 615 | /* check for strange case where we don't print a roll because groups |
| 616 | * are incompatible (had to be moved horizontally because they |
| 617 | * overlapped), and both have rolls. If the group's RX is greater |
| 618 | * than (maxwide - W_NORMAL * POINT) / 2 where |
| 619 | * maxwide is the maximum of width of the note head characters |
| 620 | * the two groups, then don't print the roll. */ |
| 621 | if (svpath(staff_p->staffno, VSCHEME)->vscheme == V_1) { |
| 622 | /* strange case only happens with 2 voices */ |
| 623 | return(YES); |
| 624 | } |
| 625 | else { |
| 626 | /* find width of widest note of this group */ |
| 627 | width1 = widest_head(gs_p) * Staffscale; |
| 628 | |
| 629 | /* find other group. If this is first voice, |
| 630 | * just look down the chord link */ |
| 631 | if (v == 0) { |
| 632 | othergs_p = gs_p->gs_p; |
| 633 | } |
| 634 | else { |
| 635 | /* follow groups until we find the one linked to this |
| 636 | * one */ |
| 637 | for (othergs_p = staff_p->groups_p[0]; |
| 638 | othergs_p != (struct GRPSYL *) 0; |
| 639 | othergs_p = othergs_p->next) { |
| 640 | if (othergs_p->gs_p == gs_p) { |
| 641 | break; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | if (othergs_p != (struct GRPSYL *) 0 && |
| 647 | othergs_p->grpcont == GC_NOTES) { |
| 648 | |
| 649 | /* find width of widest note of the other group */ |
| 650 | width2 = widest_head(othergs_p) * Staffscale; |
| 651 | |
| 652 | maxwide = MAX(width1, width2); |
| 653 | |
| 654 | if (gs_p->c[RX] > ((maxwide - W_NORMAL * POINT) / 2.0)){ |
| 655 | /* we hit the strange case */ |
| 656 | return(NO); |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | return(YES); |
| 661 | } |