1 /**************************************************************************** 2 * 3 * pshints.c 4 * 5 * Adobe's code for handling CFF hints (body). 6 * 7 * Copyright 2007-2014 Adobe Systems Incorporated. 8 * 9 * This software, and all works of authorship, whether in source or 10 * object code form as indicated by the copyright notice(s) included 11 * herein (collectively, the "Work") is made available, and may only be 12 * used, modified, and distributed under the FreeType Project License, 13 * LICENSE.TXT. Additionally, subject to the terms and conditions of the 14 * FreeType Project License, each contributor to the Work hereby grants 15 * to any individual or legal entity exercising permissions granted by 16 * the FreeType Project License and this section (hereafter, "You" or 17 * "Your") a perpetual, worldwide, non-exclusive, no-charge, 18 * royalty-free, irrevocable (except as stated in this section) patent 19 * license to make, have made, use, offer to sell, sell, import, and 20 * otherwise transfer the Work, where such license applies only to those 21 * patent claims licensable by such contributor that are necessarily 22 * infringed by their contribution(s) alone or by combination of their 23 * contribution(s) with the Work to which such contribution(s) was 24 * submitted. If You institute patent litigation against any entity 25 * (including a cross-claim or counterclaim in a lawsuit) alleging that 26 * the Work or a contribution incorporated within the Work constitutes 27 * direct or contributory patent infringement, then any patent licenses 28 * granted to You under this License for that Work shall terminate as of 29 * the date such litigation is filed. 30 * 31 * By using, modifying, or distributing the Work you indicate that you 32 * have read and understood the terms and conditions of the 33 * FreeType Project License as well as those provided in this section, 34 * and you accept them fully. 35 * 36 */ 37 38 39 #include "psft.h" 40 #include <freetype/internal/ftdebug.h> 41 42 #include "psglue.h" 43 #include "psfont.h" 44 #include "pshints.h" 45 #include "psintrp.h" 46 47 48 /************************************************************************** 49 * 50 * The macro FT_COMPONENT is used in trace mode. It is an implicit 51 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log 52 * messages during execution. 53 */ 54 #undef FT_COMPONENT 55 #define FT_COMPONENT cf2hints 56 57 58 typedef struct CF2_HintMoveRec_ 59 { 60 size_t j; /* index of upper hint map edge */ 61 CF2_Fixed moveUp; /* adjustment to optimum position */ 62 63 } CF2_HintMoveRec, *CF2_HintMove; 64 65 66 /* Compute angular momentum for winding order detection. It is called */ 67 /* for all lines and curves, but not necessarily in element order. */ 68 static CF2_Int cf2_getWindingMomentum(CF2_Fixed x1,CF2_Fixed y1,CF2_Fixed x2,CF2_Fixed y2)69 cf2_getWindingMomentum( CF2_Fixed x1, 70 CF2_Fixed y1, 71 CF2_Fixed x2, 72 CF2_Fixed y2 ) 73 { 74 /* cross product of pt1 position from origin with pt2 position from */ 75 /* pt1; we reduce the precision so that the result fits into 32 bits */ 76 77 return ( x1 >> 16 ) * ( SUB_INT32( y2, y1 ) >> 16 ) - 78 ( y1 >> 16 ) * ( SUB_INT32( x2, x1 ) >> 16 ); 79 } 80 81 82 /* 83 * Construct from a StemHint; this is used as a parameter to 84 * `cf2_blues_capture'. 85 * `hintOrigin' is the character space displacement of a seac accent. 86 * Adjust stem hint for darkening here. 87 * 88 */ 89 static void cf2_hint_init(CF2_Hint hint,const CF2_ArrStack stemHintArray,size_t indexStemHint,const CF2_Font font,CF2_Fixed hintOrigin,CF2_Fixed scale,FT_Bool bottom)90 cf2_hint_init( CF2_Hint hint, 91 const CF2_ArrStack stemHintArray, 92 size_t indexStemHint, 93 const CF2_Font font, 94 CF2_Fixed hintOrigin, 95 CF2_Fixed scale, 96 FT_Bool bottom ) 97 { 98 CF2_Fixed width; 99 const CF2_StemHintRec* stemHint; 100 101 102 FT_ZERO( hint ); 103 104 stemHint = (const CF2_StemHintRec*)cf2_arrstack_getPointer( 105 stemHintArray, 106 indexStemHint ); 107 108 width = SUB_INT32( stemHint->max, stemHint->min ); 109 110 if ( width == cf2_intToFixed( -21 ) ) 111 { 112 /* ghost bottom */ 113 114 if ( bottom ) 115 { 116 hint->csCoord = stemHint->max; 117 hint->flags = CF2_GhostBottom; 118 } 119 else 120 hint->flags = 0; 121 } 122 123 else if ( width == cf2_intToFixed( -20 ) ) 124 { 125 /* ghost top */ 126 127 if ( bottom ) 128 hint->flags = 0; 129 else 130 { 131 hint->csCoord = stemHint->min; 132 hint->flags = CF2_GhostTop; 133 } 134 } 135 136 else if ( width < 0 ) 137 { 138 /* inverted pair */ 139 140 /* 141 * Hints with negative widths were produced by an early version of a 142 * non-Adobe font tool. The Type 2 spec allows edge (ghost) hints 143 * with negative widths, but says 144 * 145 * All other negative widths have undefined meaning. 146 * 147 * CoolType has a silent workaround that negates the hint width; for 148 * permissive mode, we do the same here. 149 * 150 * Note: Such fonts cannot use ghost hints, but should otherwise work. 151 * Note: Some poor hints in our faux fonts can produce negative 152 * widths at some blends. For example, see a light weight of 153 * `u' in ASerifMM. 154 * 155 */ 156 if ( bottom ) 157 { 158 hint->csCoord = stemHint->max; 159 hint->flags = CF2_PairBottom; 160 } 161 else 162 { 163 hint->csCoord = stemHint->min; 164 hint->flags = CF2_PairTop; 165 } 166 } 167 168 else 169 { 170 /* normal pair */ 171 172 if ( bottom ) 173 { 174 hint->csCoord = stemHint->min; 175 hint->flags = CF2_PairBottom; 176 } 177 else 178 { 179 hint->csCoord = stemHint->max; 180 hint->flags = CF2_PairTop; 181 } 182 } 183 184 /* Now that ghost hints have been detected, adjust this edge for */ 185 /* darkening. Bottoms are not changed; tops are incremented by twice */ 186 /* `darkenY'. */ 187 if ( cf2_hint_isTop( hint ) ) 188 hint->csCoord = ADD_INT32( hint->csCoord, 2 * font->darkenY ); 189 190 hint->csCoord = ADD_INT32( hint->csCoord, hintOrigin ); 191 hint->scale = scale; 192 hint->index = indexStemHint; /* index in original stem hint array */ 193 194 /* if original stem hint has been used, use the same position */ 195 if ( hint->flags != 0 && stemHint->used ) 196 { 197 if ( cf2_hint_isTop( hint ) ) 198 hint->dsCoord = stemHint->maxDS; 199 else 200 hint->dsCoord = stemHint->minDS; 201 202 cf2_hint_lock( hint ); 203 } 204 else 205 hint->dsCoord = FT_MulFix( hint->csCoord, scale ); 206 } 207 208 209 /* initialize an invalid hint map element */ 210 static void cf2_hint_initZero(CF2_Hint hint)211 cf2_hint_initZero( CF2_Hint hint ) 212 { 213 FT_ZERO( hint ); 214 } 215 216 217 FT_LOCAL_DEF( FT_Bool ) cf2_hint_isValid(const CF2_Hint hint)218 cf2_hint_isValid( const CF2_Hint hint ) 219 { 220 return FT_BOOL( hint->flags ); 221 } 222 223 224 static FT_Bool cf2_hint_isPair(const CF2_Hint hint)225 cf2_hint_isPair( const CF2_Hint hint ) 226 { 227 return FT_BOOL( hint->flags & ( CF2_PairBottom | CF2_PairTop ) ); 228 } 229 230 231 static FT_Bool cf2_hint_isPairTop(const CF2_Hint hint)232 cf2_hint_isPairTop( const CF2_Hint hint ) 233 { 234 return FT_BOOL( hint->flags & CF2_PairTop ); 235 } 236 237 238 FT_LOCAL_DEF( FT_Bool ) cf2_hint_isTop(const CF2_Hint hint)239 cf2_hint_isTop( const CF2_Hint hint ) 240 { 241 return FT_BOOL( hint->flags & ( CF2_PairTop | CF2_GhostTop ) ); 242 } 243 244 245 FT_LOCAL_DEF( FT_Bool ) cf2_hint_isBottom(const CF2_Hint hint)246 cf2_hint_isBottom( const CF2_Hint hint ) 247 { 248 return FT_BOOL( hint->flags & ( CF2_PairBottom | CF2_GhostBottom ) ); 249 } 250 251 252 static FT_Bool cf2_hint_isLocked(const CF2_Hint hint)253 cf2_hint_isLocked( const CF2_Hint hint ) 254 { 255 return FT_BOOL( hint->flags & CF2_Locked ); 256 } 257 258 259 static FT_Bool cf2_hint_isSynthetic(const CF2_Hint hint)260 cf2_hint_isSynthetic( const CF2_Hint hint ) 261 { 262 return FT_BOOL( hint->flags & CF2_Synthetic ); 263 } 264 265 266 FT_LOCAL_DEF( void ) cf2_hint_lock(CF2_Hint hint)267 cf2_hint_lock( CF2_Hint hint ) 268 { 269 hint->flags |= CF2_Locked; 270 } 271 272 273 FT_LOCAL_DEF( void ) cf2_hintmap_init(CF2_HintMap hintmap,CF2_Font font,CF2_HintMap initialMap,CF2_ArrStack hintMoves,CF2_Fixed scale)274 cf2_hintmap_init( CF2_HintMap hintmap, 275 CF2_Font font, 276 CF2_HintMap initialMap, 277 CF2_ArrStack hintMoves, 278 CF2_Fixed scale ) 279 { 280 FT_ZERO( hintmap ); 281 282 /* copy parameters from font instance */ 283 hintmap->hinted = font->hinted; 284 hintmap->scale = scale; 285 hintmap->font = font; 286 hintmap->initialHintMap = initialMap; 287 /* will clear in `cf2_hintmap_adjustHints' */ 288 hintmap->hintMoves = hintMoves; 289 } 290 291 292 static FT_Bool cf2_hintmap_isValid(const CF2_HintMap hintmap)293 cf2_hintmap_isValid( const CF2_HintMap hintmap ) 294 { 295 return hintmap->isValid; 296 } 297 298 299 static void cf2_hintmap_dump(CF2_HintMap hintmap)300 cf2_hintmap_dump( CF2_HintMap hintmap ) 301 { 302 #ifdef FT_DEBUG_LEVEL_TRACE 303 CF2_UInt i; 304 305 306 FT_TRACE6(( " index csCoord dsCoord scale flags\n" )); 307 308 for ( i = 0; i < hintmap->count; i++ ) 309 { 310 CF2_Hint hint = &hintmap->edge[i]; 311 312 313 FT_TRACE6(( " %3ld %7.2f %7.2f %5d %s%s%s%s\n", 314 hint->index, 315 hint->csCoord / 65536.0, 316 hint->dsCoord / ( hint->scale * 1.0 ), 317 hint->scale, 318 ( cf2_hint_isPair( hint ) ? "p" : "g" ), 319 ( cf2_hint_isTop( hint ) ? "t" : "b" ), 320 ( cf2_hint_isLocked( hint ) ? "L" : ""), 321 ( cf2_hint_isSynthetic( hint ) ? "S" : "" ) )); 322 } 323 #else 324 FT_UNUSED( hintmap ); 325 #endif 326 } 327 328 329 /* transform character space coordinate to device space using hint map */ 330 static CF2_Fixed cf2_hintmap_map(CF2_HintMap hintmap,CF2_Fixed csCoord)331 cf2_hintmap_map( CF2_HintMap hintmap, 332 CF2_Fixed csCoord ) 333 { 334 if ( hintmap->count == 0 || !hintmap->hinted ) 335 { 336 /* there are no hints; use uniform scale and zero offset */ 337 return FT_MulFix( csCoord, hintmap->scale ); 338 } 339 else 340 { 341 /* start linear search from last hit */ 342 CF2_UInt i = hintmap->lastIndex; 343 344 345 FT_ASSERT( hintmap->lastIndex < CF2_MAX_HINT_EDGES ); 346 347 /* search up */ 348 while ( i < hintmap->count - 1 && 349 csCoord >= hintmap->edge[i + 1].csCoord ) 350 i += 1; 351 352 /* search down */ 353 while ( i > 0 && csCoord < hintmap->edge[i].csCoord ) 354 i -= 1; 355 356 hintmap->lastIndex = i; 357 358 if ( i == 0 && csCoord < hintmap->edge[0].csCoord ) 359 { 360 /* special case for points below first edge: use uniform scale */ 361 return ADD_INT32( FT_MulFix( SUB_INT32( csCoord, 362 hintmap->edge[0].csCoord ), 363 hintmap->scale ), 364 hintmap->edge[0].dsCoord ); 365 } 366 else 367 { 368 /* 369 * Note: entries with duplicate csCoord are allowed. 370 * Use edge[i], the highest entry where csCoord >= entry[i].csCoord 371 */ 372 return ADD_INT32( FT_MulFix( SUB_INT32( csCoord, 373 hintmap->edge[i].csCoord ), 374 hintmap->edge[i].scale ), 375 hintmap->edge[i].dsCoord ); 376 } 377 } 378 } 379 380 381 /* 382 * This hinting policy moves a hint pair in device space so that one of 383 * its two edges is on a device pixel boundary (its fractional part is 384 * zero). `cf2_hintmap_insertHint' guarantees no overlap in CS 385 * space. Ensure here that there is no overlap in DS. 386 * 387 * In the first pass, edges are adjusted relative to adjacent hints. 388 * Those that are below have already been adjusted. Those that are 389 * above have not yet been adjusted. If a hint above blocks an 390 * adjustment to an optimal position, we will try again in a second 391 * pass. The second pass is top-down. 392 * 393 */ 394 395 static void cf2_hintmap_adjustHints(CF2_HintMap hintmap)396 cf2_hintmap_adjustHints( CF2_HintMap hintmap ) 397 { 398 size_t i, j; 399 400 401 cf2_arrstack_clear( hintmap->hintMoves ); /* working storage */ 402 403 /* 404 * First pass is bottom-up (font hint order) without look-ahead. 405 * Locked edges are already adjusted. 406 * Unlocked edges begin with dsCoord from `initialHintMap'. 407 * Save edges that are not optimally adjusted in `hintMoves' array, 408 * and process them in second pass. 409 */ 410 411 for ( i = 0; i < hintmap->count; i++ ) 412 { 413 FT_Bool isPair = cf2_hint_isPair( &hintmap->edge[i] ); 414 415 416 /* index of upper edge (same value for ghost hint) */ 417 j = isPair ? i + 1 : i; 418 419 FT_ASSERT( j < hintmap->count ); 420 FT_ASSERT( cf2_hint_isValid( &hintmap->edge[i] ) ); 421 FT_ASSERT( cf2_hint_isValid( &hintmap->edge[j] ) ); 422 FT_ASSERT( cf2_hint_isLocked( &hintmap->edge[i] ) == 423 cf2_hint_isLocked( &hintmap->edge[j] ) ); 424 425 if ( !cf2_hint_isLocked( &hintmap->edge[i] ) ) 426 { 427 /* hint edge is not locked, we can adjust it */ 428 CF2_Fixed fracDown = cf2_fixedFraction( hintmap->edge[i].dsCoord ); 429 CF2_Fixed fracUp = cf2_fixedFraction( hintmap->edge[j].dsCoord ); 430 431 /* calculate all four possibilities; moves down are negative */ 432 CF2_Fixed downMoveDown = 0 - fracDown; 433 CF2_Fixed upMoveDown = 0 - fracUp; 434 CF2_Fixed downMoveUp = ( fracDown == 0 ) 435 ? 0 436 : cf2_intToFixed( 1 ) - fracDown; 437 CF2_Fixed upMoveUp = ( fracUp == 0 ) 438 ? 0 439 : cf2_intToFixed( 1 ) - fracUp; 440 441 /* smallest move up */ 442 CF2_Fixed moveUp = FT_MIN( downMoveUp, upMoveUp ); 443 /* smallest move down */ 444 CF2_Fixed moveDown = FT_MAX( downMoveDown, upMoveDown ); 445 446 /* final amount to move edge or edge pair */ 447 CF2_Fixed move; 448 449 CF2_Fixed downMinCounter = CF2_MIN_COUNTER; 450 CF2_Fixed upMinCounter = CF2_MIN_COUNTER; 451 FT_Bool saveEdge = FALSE; 452 453 454 /* minimum counter constraint doesn't apply when adjacent edges */ 455 /* are synthetic */ 456 /* TODO: doesn't seem a big effect; for now, reduce the code */ 457 #if 0 458 if ( i == 0 || 459 cf2_hint_isSynthetic( &hintmap->edge[i - 1] ) ) 460 downMinCounter = 0; 461 462 if ( j >= hintmap->count - 1 || 463 cf2_hint_isSynthetic( &hintmap->edge[j + 1] ) ) 464 upMinCounter = 0; 465 #endif 466 467 /* is there room to move up? */ 468 /* there is if we are at top of array or the next edge is at or */ 469 /* beyond proposed move up? */ 470 if ( j >= hintmap->count - 1 || 471 hintmap->edge[j + 1].dsCoord >= 472 ADD_INT32( hintmap->edge[j].dsCoord, 473 moveUp + upMinCounter ) ) 474 { 475 /* there is room to move up; is there also room to move down? */ 476 if ( i == 0 || 477 hintmap->edge[i - 1].dsCoord <= 478 ADD_INT32( hintmap->edge[i].dsCoord, 479 moveDown - downMinCounter ) ) 480 { 481 /* move smaller absolute amount */ 482 move = ( -moveDown < moveUp ) ? moveDown : moveUp; /* optimum */ 483 } 484 else 485 move = moveUp; 486 } 487 else 488 { 489 /* is there room to move down? */ 490 if ( i == 0 || 491 hintmap->edge[i - 1].dsCoord <= 492 ADD_INT32( hintmap->edge[i].dsCoord, 493 moveDown - downMinCounter ) ) 494 { 495 move = moveDown; 496 /* true if non-optimum move */ 497 saveEdge = FT_BOOL( moveUp < -moveDown ); 498 } 499 else 500 { 501 /* no room to move either way without overlapping or reducing */ 502 /* the counter too much */ 503 move = 0; 504 saveEdge = TRUE; 505 } 506 } 507 508 /* Identify non-moves and moves down that aren't optimal, and save */ 509 /* them for second pass. */ 510 /* Do this only if there is an unlocked edge above (which could */ 511 /* possibly move). */ 512 if ( saveEdge && 513 j < hintmap->count - 1 && 514 !cf2_hint_isLocked( &hintmap->edge[j + 1] ) ) 515 { 516 CF2_HintMoveRec savedMove; 517 518 519 savedMove.j = j; 520 /* desired adjustment in second pass */ 521 savedMove.moveUp = moveUp - move; 522 523 cf2_arrstack_push( hintmap->hintMoves, &savedMove ); 524 } 525 526 /* move the edge(s) */ 527 hintmap->edge[i].dsCoord = ADD_INT32( hintmap->edge[i].dsCoord, 528 move ); 529 if ( isPair ) 530 hintmap->edge[j].dsCoord = ADD_INT32( hintmap->edge[j].dsCoord, 531 move ); 532 } 533 534 /* assert there are no overlaps in device space */ 535 FT_ASSERT( i == 0 || 536 hintmap->edge[i - 1].dsCoord <= hintmap->edge[i].dsCoord ); 537 FT_ASSERT( i < j || 538 hintmap->edge[i].dsCoord <= hintmap->edge[j].dsCoord ); 539 540 /* adjust the scales, avoiding divide by zero */ 541 if ( i > 0 ) 542 { 543 if ( hintmap->edge[i].csCoord != hintmap->edge[i - 1].csCoord ) 544 hintmap->edge[i - 1].scale = 545 FT_DivFix( SUB_INT32( hintmap->edge[i].dsCoord, 546 hintmap->edge[i - 1].dsCoord ), 547 SUB_INT32( hintmap->edge[i].csCoord, 548 hintmap->edge[i - 1].csCoord ) ); 549 } 550 551 if ( isPair ) 552 { 553 if ( hintmap->edge[j].csCoord != hintmap->edge[j - 1].csCoord ) 554 hintmap->edge[j - 1].scale = 555 FT_DivFix( SUB_INT32( hintmap->edge[j].dsCoord, 556 hintmap->edge[j - 1].dsCoord ), 557 SUB_INT32( hintmap->edge[j].csCoord, 558 hintmap->edge[j - 1].csCoord ) ); 559 560 i += 1; /* skip upper edge on next loop */ 561 } 562 } 563 564 /* second pass tries to move non-optimal hints up, in case there is */ 565 /* room now */ 566 for ( i = cf2_arrstack_size( hintmap->hintMoves ); i > 0; i-- ) 567 { 568 CF2_HintMove hintMove = (CF2_HintMove) 569 cf2_arrstack_getPointer( hintmap->hintMoves, i - 1 ); 570 571 572 j = hintMove->j; 573 574 /* this was tested before the push, above */ 575 FT_ASSERT( j < hintmap->count - 1 ); 576 577 /* is there room to move up? */ 578 if ( hintmap->edge[j + 1].dsCoord >= 579 ADD_INT32( hintmap->edge[j].dsCoord, 580 hintMove->moveUp + CF2_MIN_COUNTER ) ) 581 { 582 /* there is more room now, move edge up */ 583 hintmap->edge[j].dsCoord = ADD_INT32( hintmap->edge[j].dsCoord, 584 hintMove->moveUp ); 585 586 if ( cf2_hint_isPair( &hintmap->edge[j] ) ) 587 { 588 FT_ASSERT( j > 0 ); 589 hintmap->edge[j - 1].dsCoord = 590 ADD_INT32( hintmap->edge[j - 1].dsCoord, hintMove->moveUp ); 591 } 592 } 593 } 594 } 595 596 597 /* insert hint edges into map, sorted by csCoord */ 598 static void cf2_hintmap_insertHint(CF2_HintMap hintmap,CF2_Hint bottomHintEdge,CF2_Hint topHintEdge)599 cf2_hintmap_insertHint( CF2_HintMap hintmap, 600 CF2_Hint bottomHintEdge, 601 CF2_Hint topHintEdge ) 602 { 603 CF2_UInt indexInsert; 604 605 /* set default values, then check for edge hints */ 606 FT_Bool isPair = TRUE; 607 CF2_Hint firstHintEdge = bottomHintEdge; 608 CF2_Hint secondHintEdge = topHintEdge; 609 610 611 /* one or none of the input params may be invalid when dealing with */ 612 /* edge hints; at least one edge must be valid */ 613 FT_ASSERT( cf2_hint_isValid( bottomHintEdge ) || 614 cf2_hint_isValid( topHintEdge ) ); 615 616 /* determine how many and which edges to insert */ 617 if ( !cf2_hint_isValid( bottomHintEdge ) ) 618 { 619 /* insert only the top edge */ 620 firstHintEdge = topHintEdge; 621 isPair = FALSE; 622 } 623 else if ( !cf2_hint_isValid( topHintEdge ) ) 624 { 625 /* insert only the bottom edge */ 626 isPair = FALSE; 627 } 628 629 /* paired edges must be in proper order */ 630 if ( isPair && 631 topHintEdge->csCoord < bottomHintEdge->csCoord ) 632 return; 633 634 /* linear search to find index value of insertion point */ 635 indexInsert = 0; 636 for ( ; indexInsert < hintmap->count; indexInsert++ ) 637 { 638 if ( hintmap->edge[indexInsert].csCoord >= firstHintEdge->csCoord ) 639 break; 640 } 641 642 FT_TRACE7(( " Got hint at %.2f (%.2f)\n", 643 firstHintEdge->csCoord / 65536.0, 644 firstHintEdge->dsCoord / 65536.0 )); 645 if ( isPair ) 646 FT_TRACE7(( " Got hint at %.2f (%.2f)\n", 647 secondHintEdge->csCoord / 65536.0, 648 secondHintEdge->dsCoord / 65536.0 )); 649 650 /* 651 * Discard any hints that overlap in character space. Most often, this 652 * is while building the initial map, where captured hints from all 653 * zones are combined. Define overlap to include hints that `touch' 654 * (overlap zero). Hiragino Sans/Gothic fonts have numerous hints that 655 * touch. Some fonts have non-ideographic glyphs that overlap our 656 * synthetic hints. 657 * 658 * Overlap also occurs when darkening stem hints that are close. 659 * 660 */ 661 if ( indexInsert < hintmap->count ) 662 { 663 /* we are inserting before an existing edge: */ 664 /* verify that an existing edge is not the same */ 665 if ( hintmap->edge[indexInsert].csCoord == firstHintEdge->csCoord ) 666 return; /* ignore overlapping stem hint */ 667 668 /* verify that a new pair does not straddle the next edge */ 669 if ( isPair && 670 hintmap->edge[indexInsert].csCoord <= secondHintEdge->csCoord ) 671 return; /* ignore overlapping stem hint */ 672 673 /* verify that we are not inserting between paired edges */ 674 if ( cf2_hint_isPairTop( &hintmap->edge[indexInsert] ) ) 675 return; /* ignore overlapping stem hint */ 676 } 677 678 /* recompute device space locations using initial hint map */ 679 if ( cf2_hintmap_isValid( hintmap->initialHintMap ) && 680 !cf2_hint_isLocked( firstHintEdge ) ) 681 { 682 if ( isPair ) 683 { 684 /* Use hint map to position the center of stem, and nominal scale */ 685 /* to position the two edges. This preserves the stem width. */ 686 CF2_Fixed midpoint = 687 cf2_hintmap_map( 688 hintmap->initialHintMap, 689 ADD_INT32( secondHintEdge->csCoord, 690 firstHintEdge->csCoord ) / 2 ); 691 CF2_Fixed halfWidth = 692 FT_MulFix( SUB_INT32( secondHintEdge->csCoord, 693 firstHintEdge->csCoord ) / 2, 694 hintmap->scale ); 695 696 697 firstHintEdge->dsCoord = SUB_INT32( midpoint, halfWidth ); 698 secondHintEdge->dsCoord = ADD_INT32( midpoint, halfWidth ); 699 } 700 else 701 firstHintEdge->dsCoord = cf2_hintmap_map( hintmap->initialHintMap, 702 firstHintEdge->csCoord ); 703 } 704 705 /* 706 * Discard any hints that overlap in device space; this can occur 707 * because locked hints have been moved to align with blue zones. 708 * 709 * TODO: Although we might correct this later during adjustment, we 710 * don't currently have a way to delete a conflicting hint once it has 711 * been inserted. See v2.030 MinionPro-Regular, 12 ppem darkened, 712 * initial hint map for second path, glyph 945 (the perispomeni (tilde) 713 * in U+1F6E, Greek omega with psili and perispomeni). Darkening is 714 * 25. Pair 667,747 initially conflicts in design space with top edge 715 * 660. This is because 667 maps to 7.87, and the top edge was 716 * captured by a zone at 8.0. The pair is later successfully inserted 717 * in a zone without the top edge. In this zone it is adjusted to 8.0, 718 * and no longer conflicts with the top edge in design space. This 719 * means it can be included in yet a later zone which does have the top 720 * edge hint. This produces a small mismatch between the first and 721 * last points of this path, even though the hint masks are the same. 722 * The density map difference is tiny (1/256). 723 * 724 */ 725 726 if ( indexInsert > 0 ) 727 { 728 /* we are inserting after an existing edge */ 729 if ( firstHintEdge->dsCoord < hintmap->edge[indexInsert - 1].dsCoord ) 730 return; 731 } 732 733 if ( indexInsert < hintmap->count ) 734 { 735 /* we are inserting before an existing edge */ 736 if ( isPair ) 737 { 738 if ( secondHintEdge->dsCoord > hintmap->edge[indexInsert].dsCoord ) 739 return; 740 } 741 else 742 { 743 if ( firstHintEdge->dsCoord > hintmap->edge[indexInsert].dsCoord ) 744 return; 745 } 746 } 747 748 /* make room to insert */ 749 { 750 CF2_UInt iSrc = hintmap->count - 1; 751 CF2_UInt iDst = isPair ? hintmap->count + 1 : hintmap->count; 752 753 CF2_UInt count = hintmap->count - indexInsert; 754 755 756 if ( iDst >= CF2_MAX_HINT_EDGES ) 757 { 758 FT_TRACE4(( "cf2_hintmap_insertHint: too many hintmaps\n" )); 759 return; 760 } 761 762 while ( count-- ) 763 hintmap->edge[iDst--] = hintmap->edge[iSrc--]; 764 765 /* insert first edge */ 766 hintmap->edge[indexInsert] = *firstHintEdge; /* copy struct */ 767 hintmap->count += 1; 768 769 FT_TRACE7(( " Inserting hint %.2f (%.2f)\n", 770 firstHintEdge->csCoord / 65536.0, 771 firstHintEdge->dsCoord / 65536.0 )); 772 773 if ( isPair ) 774 { 775 /* insert second edge */ 776 hintmap->edge[indexInsert + 1] = *secondHintEdge; /* copy struct */ 777 hintmap->count += 1; 778 779 FT_TRACE7(( " Inserting hint %.2f (%.2f)\n", 780 secondHintEdge->csCoord / 65536.0, 781 secondHintEdge->dsCoord / 65536.0 )); 782 783 } 784 } 785 786 return; 787 } 788 789 790 /* 791 * Build a map from hints and mask. 792 * 793 * This function may recur one level if `hintmap->initialHintMap' is not yet 794 * valid. 795 * If `initialMap' is true, simply build initial map. 796 * 797 * Synthetic hints are used in two ways. A hint at zero is inserted, if 798 * needed, in the initial hint map, to prevent translations from 799 * propagating across the origin. If synthetic em box hints are enabled 800 * for ideographic dictionaries, then they are inserted in all hint 801 * maps, including the initial one. 802 * 803 */ 804 FT_LOCAL_DEF( void ) cf2_hintmap_build(CF2_HintMap hintmap,CF2_ArrStack hStemHintArray,CF2_ArrStack vStemHintArray,CF2_HintMask hintMask,CF2_Fixed hintOrigin,FT_Bool initialMap)805 cf2_hintmap_build( CF2_HintMap hintmap, 806 CF2_ArrStack hStemHintArray, 807 CF2_ArrStack vStemHintArray, 808 CF2_HintMask hintMask, 809 CF2_Fixed hintOrigin, 810 FT_Bool initialMap ) 811 { 812 FT_Byte* maskPtr; 813 814 CF2_Font font = hintmap->font; 815 CF2_HintMaskRec tempHintMask; 816 817 size_t bitCount, i; 818 FT_Byte maskByte; 819 820 821 /* check whether initial map is constructed */ 822 if ( !initialMap && !cf2_hintmap_isValid( hintmap->initialHintMap ) ) 823 { 824 /* make recursive call with initialHintMap and temporary mask; */ 825 /* temporary mask will get all bits set, below */ 826 cf2_hintmask_init( &tempHintMask, hintMask->error ); 827 cf2_hintmap_build( hintmap->initialHintMap, 828 hStemHintArray, 829 vStemHintArray, 830 &tempHintMask, 831 hintOrigin, 832 TRUE ); 833 } 834 835 if ( !cf2_hintmask_isValid( hintMask ) ) 836 { 837 /* without a hint mask, assume all hints are active */ 838 cf2_hintmask_setAll( hintMask, 839 cf2_arrstack_size( hStemHintArray ) + 840 cf2_arrstack_size( vStemHintArray ) ); 841 if ( !cf2_hintmask_isValid( hintMask ) ) 842 { 843 if ( font->isT1 ) 844 { 845 /* no error, just continue unhinted */ 846 *hintMask->error = FT_Err_Ok; 847 hintmap->hinted = FALSE; 848 } 849 return; /* too many stem hints */ 850 } 851 } 852 853 /* begin by clearing the map */ 854 hintmap->count = 0; 855 hintmap->lastIndex = 0; 856 857 /* make a copy of the hint mask so we can modify it */ 858 tempHintMask = *hintMask; 859 maskPtr = cf2_hintmask_getMaskPtr( &tempHintMask ); 860 861 /* use the hStem hints only, which are first in the mask */ 862 bitCount = cf2_arrstack_size( hStemHintArray ); 863 864 /* Defense-in-depth. Should never return here. */ 865 if ( bitCount > hintMask->bitCount ) 866 return; 867 868 /* synthetic embox hints get highest priority */ 869 if ( font->blues.doEmBoxHints ) 870 { 871 CF2_HintRec dummy; 872 873 874 cf2_hint_initZero( &dummy ); /* invalid hint map element */ 875 876 /* ghost bottom */ 877 cf2_hintmap_insertHint( hintmap, 878 &font->blues.emBoxBottomEdge, 879 &dummy ); 880 /* ghost top */ 881 cf2_hintmap_insertHint( hintmap, 882 &dummy, 883 &font->blues.emBoxTopEdge ); 884 } 885 886 /* insert hints captured by a blue zone or already locked (higher */ 887 /* priority) */ 888 for ( i = 0, maskByte = 0x80; i < bitCount; i++ ) 889 { 890 if ( maskByte & *maskPtr ) 891 { 892 /* expand StemHint into two `CF2_Hint' elements */ 893 CF2_HintRec bottomHintEdge, topHintEdge; 894 895 896 cf2_hint_init( &bottomHintEdge, 897 hStemHintArray, 898 i, 899 font, 900 hintOrigin, 901 hintmap->scale, 902 TRUE /* bottom */ ); 903 cf2_hint_init( &topHintEdge, 904 hStemHintArray, 905 i, 906 font, 907 hintOrigin, 908 hintmap->scale, 909 FALSE /* top */ ); 910 911 if ( cf2_hint_isLocked( &bottomHintEdge ) || 912 cf2_hint_isLocked( &topHintEdge ) || 913 cf2_blues_capture( &font->blues, 914 &bottomHintEdge, 915 &topHintEdge ) ) 916 { 917 /* insert captured hint into map */ 918 cf2_hintmap_insertHint( hintmap, &bottomHintEdge, &topHintEdge ); 919 920 *maskPtr &= ~maskByte; /* turn off the bit for this hint */ 921 } 922 } 923 924 if ( ( i & 7 ) == 7 ) 925 { 926 /* move to next mask byte */ 927 maskPtr++; 928 maskByte = 0x80; 929 } 930 else 931 maskByte >>= 1; 932 } 933 934 /* initial hint map includes only captured hints plus maybe one at 0 */ 935 936 /* 937 * TODO: There is a problem here because we are trying to build a 938 * single hint map containing all captured hints. It is 939 * possible for there to be conflicts between captured hints, 940 * either because of darkening or because the hints are in 941 * separate hint zones (we are ignoring hint zones for the 942 * initial map). An example of the latter is MinionPro-Regular 943 * v2.030 glyph 883 (Greek Capital Alpha with Psili) at 15ppem. 944 * A stem hint for the psili conflicts with the top edge hint 945 * for the base character. The stem hint gets priority because 946 * of its sort order. In glyph 884 (Greek Capital Alpha with 947 * Psili and Oxia), the top of the base character gets a stem 948 * hint, and the psili does not. This creates different initial 949 * maps for the two glyphs resulting in different renderings of 950 * the base character. Will probably defer this either as not 951 * worth the cost or as a font bug. I don't think there is any 952 * good reason for an accent to be captured by an alignment 953 * zone. -darnold 2/12/10 954 */ 955 956 if ( initialMap ) 957 { 958 /* Apply a heuristic that inserts a point for (0,0), unless it's */ 959 /* already covered by a mapping. This locks the baseline for glyphs */ 960 /* that have no baseline hints. */ 961 962 if ( hintmap->count == 0 || 963 hintmap->edge[0].csCoord > 0 || 964 hintmap->edge[hintmap->count - 1].csCoord < 0 ) 965 { 966 /* all edges are above 0 or all edges are below 0; */ 967 /* construct a locked edge hint at 0 */ 968 969 CF2_HintRec edge, invalid; 970 971 972 cf2_hint_initZero( &edge ); 973 974 edge.flags = CF2_GhostBottom | 975 CF2_Locked | 976 CF2_Synthetic; 977 edge.scale = hintmap->scale; 978 979 cf2_hint_initZero( &invalid ); 980 cf2_hintmap_insertHint( hintmap, &edge, &invalid ); 981 } 982 } 983 else 984 { 985 /* insert remaining hints */ 986 987 maskPtr = cf2_hintmask_getMaskPtr( &tempHintMask ); 988 989 for ( i = 0, maskByte = 0x80; i < bitCount; i++ ) 990 { 991 if ( maskByte & *maskPtr ) 992 { 993 CF2_HintRec bottomHintEdge, topHintEdge; 994 995 996 cf2_hint_init( &bottomHintEdge, 997 hStemHintArray, 998 i, 999 font, 1000 hintOrigin, 1001 hintmap->scale, 1002 TRUE /* bottom */ ); 1003 cf2_hint_init( &topHintEdge, 1004 hStemHintArray, 1005 i, 1006 font, 1007 hintOrigin, 1008 hintmap->scale, 1009 FALSE /* top */ ); 1010 1011 cf2_hintmap_insertHint( hintmap, &bottomHintEdge, &topHintEdge ); 1012 } 1013 1014 if ( ( i & 7 ) == 7 ) 1015 { 1016 /* move to next mask byte */ 1017 maskPtr++; 1018 maskByte = 0x80; 1019 } 1020 else 1021 maskByte >>= 1; 1022 } 1023 } 1024 1025 FT_TRACE6(( "%s\n", initialMap ? "flags: [p]air [g]host [t]op" 1026 " [b]ottom [L]ocked [S]ynthetic\n" 1027 "Initial hintmap" 1028 : "Hints:" )); 1029 cf2_hintmap_dump( hintmap ); 1030 1031 /* 1032 * Note: The following line is a convenient place to break when 1033 * debugging hinting. Examine `hintmap->edge' for the list of 1034 * enabled hints, then step over the call to see the effect of 1035 * adjustment. We stop here first on the recursive call that 1036 * creates the initial map, and then on each counter group and 1037 * hint zone. 1038 */ 1039 1040 /* adjust positions of hint edges that are not locked to blue zones */ 1041 cf2_hintmap_adjustHints( hintmap ); 1042 1043 FT_TRACE6(( "(adjusted)\n" )); 1044 cf2_hintmap_dump( hintmap ); 1045 1046 /* save the position of all hints that were used in this hint map; */ 1047 /* if we use them again, we'll locate them in the same position */ 1048 if ( !initialMap ) 1049 { 1050 for ( i = 0; i < hintmap->count; i++ ) 1051 { 1052 if ( !cf2_hint_isSynthetic( &hintmap->edge[i] ) ) 1053 { 1054 /* Note: include both valid and invalid edges */ 1055 /* Note: top and bottom edges are copied back separately */ 1056 CF2_StemHint stemhint = (CF2_StemHint) 1057 cf2_arrstack_getPointer( hStemHintArray, 1058 hintmap->edge[i].index ); 1059 1060 1061 if ( cf2_hint_isTop( &hintmap->edge[i] ) ) 1062 stemhint->maxDS = hintmap->edge[i].dsCoord; 1063 else 1064 stemhint->minDS = hintmap->edge[i].dsCoord; 1065 1066 stemhint->used = TRUE; 1067 } 1068 } 1069 } 1070 1071 /* hint map is ready to use */ 1072 hintmap->isValid = TRUE; 1073 1074 /* remember this mask has been used */ 1075 cf2_hintmask_setNew( hintMask, FALSE ); 1076 } 1077 1078 1079 FT_LOCAL_DEF( void ) cf2_glyphpath_init(CF2_GlyphPath glyphpath,CF2_Font font,CF2_OutlineCallbacks callbacks,CF2_Fixed scaleY,CF2_ArrStack hStemHintArray,CF2_ArrStack vStemHintArray,CF2_HintMask hintMask,CF2_Fixed hintOriginY,const CF2_Blues blues,const FT_Vector * fractionalTranslation)1080 cf2_glyphpath_init( CF2_GlyphPath glyphpath, 1081 CF2_Font font, 1082 CF2_OutlineCallbacks callbacks, 1083 CF2_Fixed scaleY, 1084 /* CF2_Fixed hShift, */ 1085 CF2_ArrStack hStemHintArray, 1086 CF2_ArrStack vStemHintArray, 1087 CF2_HintMask hintMask, 1088 CF2_Fixed hintOriginY, 1089 const CF2_Blues blues, 1090 const FT_Vector* fractionalTranslation ) 1091 { 1092 FT_ZERO( glyphpath ); 1093 1094 glyphpath->font = font; 1095 glyphpath->callbacks = callbacks; 1096 1097 cf2_arrstack_init( &glyphpath->hintMoves, 1098 font->memory, 1099 &font->error, 1100 sizeof ( CF2_HintMoveRec ) ); 1101 1102 cf2_hintmap_init( &glyphpath->initialHintMap, 1103 font, 1104 &glyphpath->initialHintMap, 1105 &glyphpath->hintMoves, 1106 scaleY ); 1107 cf2_hintmap_init( &glyphpath->firstHintMap, 1108 font, 1109 &glyphpath->initialHintMap, 1110 &glyphpath->hintMoves, 1111 scaleY ); 1112 cf2_hintmap_init( &glyphpath->hintMap, 1113 font, 1114 &glyphpath->initialHintMap, 1115 &glyphpath->hintMoves, 1116 scaleY ); 1117 1118 glyphpath->scaleX = font->innerTransform.a; 1119 glyphpath->scaleC = font->innerTransform.c; 1120 glyphpath->scaleY = font->innerTransform.d; 1121 1122 glyphpath->fractionalTranslation = *fractionalTranslation; 1123 1124 #if 0 1125 glyphpath->hShift = hShift; /* for fauxing */ 1126 #endif 1127 1128 glyphpath->hStemHintArray = hStemHintArray; 1129 glyphpath->vStemHintArray = vStemHintArray; 1130 glyphpath->hintMask = hintMask; /* ptr to current mask */ 1131 glyphpath->hintOriginY = hintOriginY; 1132 glyphpath->blues = blues; 1133 glyphpath->darken = font->darkened; /* TODO: should we make copies? */ 1134 glyphpath->xOffset = font->darkenX; 1135 glyphpath->yOffset = font->darkenY; 1136 glyphpath->miterLimit = 2 * FT_MAX( 1137 cf2_fixedAbs( glyphpath->xOffset ), 1138 cf2_fixedAbs( glyphpath->yOffset ) ); 1139 1140 /* .1 character space unit */ 1141 glyphpath->snapThreshold = cf2_doubleToFixed( 0.1 ); 1142 1143 glyphpath->moveIsPending = TRUE; 1144 glyphpath->pathIsOpen = FALSE; 1145 glyphpath->pathIsClosing = FALSE; 1146 glyphpath->elemIsQueued = FALSE; 1147 } 1148 1149 1150 FT_LOCAL_DEF( void ) cf2_glyphpath_finalize(CF2_GlyphPath glyphpath)1151 cf2_glyphpath_finalize( CF2_GlyphPath glyphpath ) 1152 { 1153 cf2_arrstack_finalize( &glyphpath->hintMoves ); 1154 } 1155 1156 1157 /* 1158 * Hint point in y-direction and apply outerTransform. 1159 * Input `current' hint map (which is actually delayed by one element). 1160 * Input x,y point in Character Space. 1161 * Output x,y point in Device Space, including translation. 1162 */ 1163 static void cf2_glyphpath_hintPoint(CF2_GlyphPath glyphpath,CF2_HintMap hintmap,FT_Vector * ppt,CF2_Fixed x,CF2_Fixed y)1164 cf2_glyphpath_hintPoint( CF2_GlyphPath glyphpath, 1165 CF2_HintMap hintmap, 1166 FT_Vector* ppt, 1167 CF2_Fixed x, 1168 CF2_Fixed y ) 1169 { 1170 FT_Vector pt; /* hinted point in upright DS */ 1171 1172 1173 pt.x = ADD_INT32( FT_MulFix( glyphpath->scaleX, x ), 1174 FT_MulFix( glyphpath->scaleC, y ) ); 1175 pt.y = cf2_hintmap_map( hintmap, y ); 1176 1177 ppt->x = ADD_INT32( 1178 FT_MulFix( glyphpath->font->outerTransform.a, pt.x ), 1179 ADD_INT32( 1180 FT_MulFix( glyphpath->font->outerTransform.c, pt.y ), 1181 glyphpath->fractionalTranslation.x ) ); 1182 ppt->y = ADD_INT32( 1183 FT_MulFix( glyphpath->font->outerTransform.b, pt.x ), 1184 ADD_INT32( 1185 FT_MulFix( glyphpath->font->outerTransform.d, pt.y ), 1186 glyphpath->fractionalTranslation.y ) ); 1187 } 1188 1189 1190 /* 1191 * From two line segments, (u1,u2) and (v1,v2), compute a point of 1192 * intersection on the corresponding lines. 1193 * Return false if no intersection is found, or if the intersection is 1194 * too far away from the ends of the line segments, u2 and v1. 1195 * 1196 */ 1197 static FT_Bool cf2_glyphpath_computeIntersection(CF2_GlyphPath glyphpath,const FT_Vector * u1,const FT_Vector * u2,const FT_Vector * v1,const FT_Vector * v2,FT_Vector * intersection)1198 cf2_glyphpath_computeIntersection( CF2_GlyphPath glyphpath, 1199 const FT_Vector* u1, 1200 const FT_Vector* u2, 1201 const FT_Vector* v1, 1202 const FT_Vector* v2, 1203 FT_Vector* intersection ) 1204 { 1205 /* 1206 * Let `u' be a zero-based vector from the first segment, `v' from the 1207 * second segment. 1208 * Let `w 'be the zero-based vector from `u1' to `v1'. 1209 * `perp' is the `perpendicular dot product'; see 1210 * https://mathworld.wolfram.com/PerpDotProduct.html. 1211 * `s' is the parameter for the parametric line for the first segment 1212 * (`u'). 1213 * 1214 * See notation in 1215 * http://geomalgorithms.com/a05-_intersect-1.html. 1216 * Calculations are done in 16.16, but must handle the squaring of 1217 * line lengths in character space. We scale all vectors by 1/32 to 1218 * avoid overflow. This allows values up to 4095 to be squared. The 1219 * scale factor cancels in the divide. 1220 * 1221 * TODO: the scale factor could be computed from UnitsPerEm. 1222 * 1223 */ 1224 1225 #define cf2_perp( a, b ) \ 1226 ( FT_MulFix( a.x, b.y ) - FT_MulFix( a.y, b.x ) ) 1227 1228 /* round and divide by 32 */ 1229 #define CF2_CS_SCALE( x ) \ 1230 ( ( (x) + 0x10 ) >> 5 ) 1231 1232 FT_Vector u, v, w; /* scaled vectors */ 1233 CF2_Fixed denominator, s; 1234 1235 1236 u.x = CF2_CS_SCALE( SUB_INT32( u2->x, u1->x ) ); 1237 u.y = CF2_CS_SCALE( SUB_INT32( u2->y, u1->y ) ); 1238 v.x = CF2_CS_SCALE( SUB_INT32( v2->x, v1->x ) ); 1239 v.y = CF2_CS_SCALE( SUB_INT32( v2->y, v1->y ) ); 1240 w.x = CF2_CS_SCALE( SUB_INT32( v1->x, u1->x ) ); 1241 w.y = CF2_CS_SCALE( SUB_INT32( v1->y, u1->y ) ); 1242 1243 denominator = cf2_perp( u, v ); 1244 1245 if ( denominator == 0 ) 1246 return FALSE; /* parallel or coincident lines */ 1247 1248 s = FT_DivFix( cf2_perp( w, v ), denominator ); 1249 1250 intersection->x = ADD_INT32( u1->x, 1251 FT_MulFix( s, SUB_INT32( u2->x, u1->x ) ) ); 1252 intersection->y = ADD_INT32( u1->y, 1253 FT_MulFix( s, SUB_INT32( u2->y, u1->y ) ) ); 1254 1255 1256 /* 1257 * Special case snapping for horizontal and vertical lines. 1258 * This cleans up intersections and reduces problems with winding 1259 * order detection. 1260 * Sample case is sbc cd KozGoPr6N-Medium.otf 20 16685. 1261 * Note: these calculations are in character space. 1262 * 1263 */ 1264 1265 if ( u1->x == u2->x && 1266 cf2_fixedAbs( SUB_INT32( intersection->x, 1267 u1->x ) ) < glyphpath->snapThreshold ) 1268 intersection->x = u1->x; 1269 if ( u1->y == u2->y && 1270 cf2_fixedAbs( SUB_INT32( intersection->y, 1271 u1->y ) ) < glyphpath->snapThreshold ) 1272 intersection->y = u1->y; 1273 1274 if ( v1->x == v2->x && 1275 cf2_fixedAbs( SUB_INT32( intersection->x, 1276 v1->x ) ) < glyphpath->snapThreshold ) 1277 intersection->x = v1->x; 1278 if ( v1->y == v2->y && 1279 cf2_fixedAbs( SUB_INT32( intersection->y, 1280 v1->y ) ) < glyphpath->snapThreshold ) 1281 intersection->y = v1->y; 1282 1283 /* limit the intersection distance from midpoint of u2 and v1 */ 1284 if ( cf2_fixedAbs( intersection->x - ADD_INT32( u2->x, v1->x ) / 2 ) > 1285 glyphpath->miterLimit || 1286 cf2_fixedAbs( intersection->y - ADD_INT32( u2->y, v1->y ) / 2 ) > 1287 glyphpath->miterLimit ) 1288 return FALSE; 1289 1290 return TRUE; 1291 } 1292 1293 1294 /* 1295 * Push the cached element (glyphpath->prevElem*) to the outline 1296 * consumer. When a darkening offset is used, the end point of the 1297 * cached element may be adjusted to an intersection point or we may 1298 * synthesize a connecting line to the current element. If we are 1299 * closing a subpath, we may also generate a connecting line to the start 1300 * point. 1301 * 1302 * This is where Character Space (CS) is converted to Device Space (DS) 1303 * using a hint map. This calculation must use a HintMap that was valid 1304 * at the time the element was saved. For the first point in a subpath, 1305 * that is a saved HintMap. For most elements, it just means the caller 1306 * has delayed building a HintMap from the current HintMask. 1307 * 1308 * Transform each point with outerTransform and call the outline 1309 * callbacks. This is a general 3x3 transform: 1310 * 1311 * x' = a*x + c*y + tx, y' = b*x + d*y + ty 1312 * 1313 * but it uses 4 elements from CF2_Font and the translation part 1314 * from CF2_GlyphPath. 1315 * 1316 */ 1317 static void cf2_glyphpath_pushPrevElem(CF2_GlyphPath glyphpath,CF2_HintMap hintmap,FT_Vector * nextP0,FT_Vector nextP1,FT_Bool close)1318 cf2_glyphpath_pushPrevElem( CF2_GlyphPath glyphpath, 1319 CF2_HintMap hintmap, 1320 FT_Vector* nextP0, 1321 FT_Vector nextP1, 1322 FT_Bool close ) 1323 { 1324 CF2_CallbackParamsRec params; 1325 1326 FT_Vector* prevP0; 1327 FT_Vector* prevP1; 1328 1329 FT_Vector intersection = { 0, 0 }; 1330 FT_Bool useIntersection = FALSE; 1331 1332 1333 FT_ASSERT( glyphpath->prevElemOp == CF2_PathOpLineTo || 1334 glyphpath->prevElemOp == CF2_PathOpCubeTo ); 1335 1336 if ( glyphpath->prevElemOp == CF2_PathOpLineTo ) 1337 { 1338 prevP0 = &glyphpath->prevElemP0; 1339 prevP1 = &glyphpath->prevElemP1; 1340 } 1341 else 1342 { 1343 prevP0 = &glyphpath->prevElemP2; 1344 prevP1 = &glyphpath->prevElemP3; 1345 } 1346 1347 /* optimization: if previous and next elements are offset by the same */ 1348 /* amount, then there will be no gap, and no need to compute an */ 1349 /* intersection. */ 1350 if ( prevP1->x != nextP0->x || prevP1->y != nextP0->y ) 1351 { 1352 /* previous element does not join next element: */ 1353 /* adjust end point of previous element to the intersection */ 1354 useIntersection = cf2_glyphpath_computeIntersection( glyphpath, 1355 prevP0, 1356 prevP1, 1357 nextP0, 1358 &nextP1, 1359 &intersection ); 1360 if ( useIntersection ) 1361 { 1362 /* modify the last point of the cached element (either line or */ 1363 /* curve) */ 1364 *prevP1 = intersection; 1365 } 1366 } 1367 1368 params.pt0 = glyphpath->currentDS; 1369 1370 switch( glyphpath->prevElemOp ) 1371 { 1372 case CF2_PathOpLineTo: 1373 params.op = CF2_PathOpLineTo; 1374 1375 /* note: pt2 and pt3 are unused */ 1376 1377 if ( close ) 1378 { 1379 /* use first hint map if closing */ 1380 cf2_glyphpath_hintPoint( glyphpath, 1381 &glyphpath->firstHintMap, 1382 ¶ms.pt1, 1383 glyphpath->prevElemP1.x, 1384 glyphpath->prevElemP1.y ); 1385 } 1386 else 1387 { 1388 cf2_glyphpath_hintPoint( glyphpath, 1389 hintmap, 1390 ¶ms.pt1, 1391 glyphpath->prevElemP1.x, 1392 glyphpath->prevElemP1.y ); 1393 } 1394 1395 /* output only non-zero length lines */ 1396 if ( params.pt0.x != params.pt1.x || params.pt0.y != params.pt1.y ) 1397 { 1398 glyphpath->callbacks->lineTo( glyphpath->callbacks, ¶ms ); 1399 1400 glyphpath->currentDS = params.pt1; 1401 } 1402 break; 1403 1404 case CF2_PathOpCubeTo: 1405 params.op = CF2_PathOpCubeTo; 1406 1407 /* TODO: should we intersect the interior joins (p1-p2 and p2-p3)? */ 1408 cf2_glyphpath_hintPoint( glyphpath, 1409 hintmap, 1410 ¶ms.pt1, 1411 glyphpath->prevElemP1.x, 1412 glyphpath->prevElemP1.y ); 1413 cf2_glyphpath_hintPoint( glyphpath, 1414 hintmap, 1415 ¶ms.pt2, 1416 glyphpath->prevElemP2.x, 1417 glyphpath->prevElemP2.y ); 1418 cf2_glyphpath_hintPoint( glyphpath, 1419 hintmap, 1420 ¶ms.pt3, 1421 glyphpath->prevElemP3.x, 1422 glyphpath->prevElemP3.y ); 1423 1424 glyphpath->callbacks->cubeTo( glyphpath->callbacks, ¶ms ); 1425 1426 glyphpath->currentDS = params.pt3; 1427 1428 break; 1429 } 1430 1431 if ( !useIntersection || close ) 1432 { 1433 /* insert connecting line between end of previous element and start */ 1434 /* of current one */ 1435 /* note: at the end of a subpath, we might do both, so use `nextP0' */ 1436 /* before we change it, below */ 1437 1438 if ( close ) 1439 { 1440 /* if we are closing the subpath, then nextP0 is in the first */ 1441 /* hint zone */ 1442 cf2_glyphpath_hintPoint( glyphpath, 1443 &glyphpath->firstHintMap, 1444 ¶ms.pt1, 1445 nextP0->x, 1446 nextP0->y ); 1447 } 1448 else 1449 { 1450 cf2_glyphpath_hintPoint( glyphpath, 1451 hintmap, 1452 ¶ms.pt1, 1453 nextP0->x, 1454 nextP0->y ); 1455 } 1456 1457 if ( params.pt1.x != glyphpath->currentDS.x || 1458 params.pt1.y != glyphpath->currentDS.y ) 1459 { 1460 /* length is nonzero */ 1461 params.op = CF2_PathOpLineTo; 1462 params.pt0 = glyphpath->currentDS; 1463 1464 /* note: pt2 and pt3 are unused */ 1465 glyphpath->callbacks->lineTo( glyphpath->callbacks, ¶ms ); 1466 1467 glyphpath->currentDS = params.pt1; 1468 } 1469 } 1470 1471 if ( useIntersection ) 1472 { 1473 /* return intersection point to caller */ 1474 *nextP0 = intersection; 1475 } 1476 } 1477 1478 1479 /* push a MoveTo element based on current point and offset of current */ 1480 /* element */ 1481 static void cf2_glyphpath_pushMove(CF2_GlyphPath glyphpath,FT_Vector start)1482 cf2_glyphpath_pushMove( CF2_GlyphPath glyphpath, 1483 FT_Vector start ) 1484 { 1485 CF2_CallbackParamsRec params; 1486 1487 1488 params.op = CF2_PathOpMoveTo; 1489 params.pt0 = glyphpath->currentDS; 1490 1491 /* Test if move has really happened yet; it would have called */ 1492 /* `cf2_hintmap_build' to set `isValid'. */ 1493 if ( !cf2_hintmap_isValid( &glyphpath->hintMap ) ) 1494 { 1495 /* we are here iff first subpath is missing a moveto operator: */ 1496 /* synthesize first moveTo to finish initialization of hintMap */ 1497 cf2_glyphpath_moveTo( glyphpath, 1498 glyphpath->start.x, 1499 glyphpath->start.y ); 1500 } 1501 1502 cf2_glyphpath_hintPoint( glyphpath, 1503 &glyphpath->hintMap, 1504 ¶ms.pt1, 1505 start.x, 1506 start.y ); 1507 1508 /* note: pt2 and pt3 are unused */ 1509 glyphpath->callbacks->moveTo( glyphpath->callbacks, ¶ms ); 1510 1511 glyphpath->currentDS = params.pt1; 1512 glyphpath->offsetStart0 = start; 1513 } 1514 1515 1516 /* 1517 * All coordinates are in character space. 1518 * On input, (x1, y1) and (x2, y2) give line segment. 1519 * On output, (x, y) give offset vector. 1520 * We use a piecewise approximation to trig functions. 1521 * 1522 * TODO: Offset true perpendicular and proper length 1523 * supply the y-translation for hinting here, too, 1524 * that adds yOffset unconditionally to *y. 1525 */ 1526 static void cf2_glyphpath_computeOffset(CF2_GlyphPath glyphpath,CF2_Fixed x1,CF2_Fixed y1,CF2_Fixed x2,CF2_Fixed y2,CF2_Fixed * x,CF2_Fixed * y)1527 cf2_glyphpath_computeOffset( CF2_GlyphPath glyphpath, 1528 CF2_Fixed x1, 1529 CF2_Fixed y1, 1530 CF2_Fixed x2, 1531 CF2_Fixed y2, 1532 CF2_Fixed* x, 1533 CF2_Fixed* y ) 1534 { 1535 CF2_Fixed dx = SUB_INT32( x2, x1 ); 1536 CF2_Fixed dy = SUB_INT32( y2, y1 ); 1537 1538 1539 /* note: negative offsets don't work here; negate deltas to change */ 1540 /* quadrants, below */ 1541 if ( glyphpath->font->reverseWinding ) 1542 { 1543 dx = NEG_INT32( dx ); 1544 dy = NEG_INT32( dy ); 1545 } 1546 1547 *x = *y = 0; 1548 1549 if ( !glyphpath->darken ) 1550 return; 1551 1552 /* add momentum for this path element */ 1553 glyphpath->callbacks->windingMomentum = 1554 ADD_INT32( glyphpath->callbacks->windingMomentum, 1555 cf2_getWindingMomentum( x1, y1, x2, y2 ) ); 1556 1557 /* note: allow mixed integer and fixed multiplication here */ 1558 if ( dx >= 0 ) 1559 { 1560 if ( dy >= 0 ) 1561 { 1562 /* first quadrant, +x +y */ 1563 1564 if ( dx > MUL_INT32( 2, dy ) ) 1565 { 1566 /* +x */ 1567 *x = 0; 1568 *y = 0; 1569 } 1570 else if ( dy > MUL_INT32( 2, dx ) ) 1571 { 1572 /* +y */ 1573 *x = glyphpath->xOffset; 1574 *y = glyphpath->yOffset; 1575 } 1576 else 1577 { 1578 /* +x +y */ 1579 *x = FT_MulFix( cf2_doubleToFixed( 0.7 ), 1580 glyphpath->xOffset ); 1581 *y = FT_MulFix( cf2_doubleToFixed( 1.0 - 0.7 ), 1582 glyphpath->yOffset ); 1583 } 1584 } 1585 else 1586 { 1587 /* fourth quadrant, +x -y */ 1588 1589 if ( dx > MUL_INT32( -2, dy ) ) 1590 { 1591 /* +x */ 1592 *x = 0; 1593 *y = 0; 1594 } 1595 else if ( NEG_INT32( dy ) > MUL_INT32( 2, dx ) ) 1596 { 1597 /* -y */ 1598 *x = NEG_INT32( glyphpath->xOffset ); 1599 *y = glyphpath->yOffset; 1600 } 1601 else 1602 { 1603 /* +x -y */ 1604 *x = FT_MulFix( cf2_doubleToFixed( -0.7 ), 1605 glyphpath->xOffset ); 1606 *y = FT_MulFix( cf2_doubleToFixed( 1.0 - 0.7 ), 1607 glyphpath->yOffset ); 1608 } 1609 } 1610 } 1611 else 1612 { 1613 if ( dy >= 0 ) 1614 { 1615 /* second quadrant, -x +y */ 1616 1617 if ( NEG_INT32( dx ) > MUL_INT32( 2, dy ) ) 1618 { 1619 /* -x */ 1620 *x = 0; 1621 *y = MUL_INT32( 2, glyphpath->yOffset ); 1622 } 1623 else if ( dy > MUL_INT32( -2, dx ) ) 1624 { 1625 /* +y */ 1626 *x = glyphpath->xOffset; 1627 *y = glyphpath->yOffset; 1628 } 1629 else 1630 { 1631 /* -x +y */ 1632 *x = FT_MulFix( cf2_doubleToFixed( 0.7 ), 1633 glyphpath->xOffset ); 1634 *y = FT_MulFix( cf2_doubleToFixed( 1.0 + 0.7 ), 1635 glyphpath->yOffset ); 1636 } 1637 } 1638 else 1639 { 1640 /* third quadrant, -x -y */ 1641 1642 if ( NEG_INT32( dx ) > MUL_INT32( -2, dy ) ) 1643 { 1644 /* -x */ 1645 *x = 0; 1646 *y = MUL_INT32( 2, glyphpath->yOffset ); 1647 } 1648 else if ( NEG_INT32( dy ) > MUL_INT32( -2, dx ) ) 1649 { 1650 /* -y */ 1651 *x = NEG_INT32( glyphpath->xOffset ); 1652 *y = glyphpath->yOffset; 1653 } 1654 else 1655 { 1656 /* -x -y */ 1657 *x = FT_MulFix( cf2_doubleToFixed( -0.7 ), 1658 glyphpath->xOffset ); 1659 *y = FT_MulFix( cf2_doubleToFixed( 1.0 + 0.7 ), 1660 glyphpath->yOffset ); 1661 } 1662 } 1663 } 1664 } 1665 1666 1667 /* 1668 * The functions cf2_glyphpath_{moveTo,lineTo,curveTo,closeOpenPath} are 1669 * called by the interpreter with Character Space (CS) coordinates. Each 1670 * path element is placed into a queue of length one to await the 1671 * calculation of the following element. At that time, the darkening 1672 * offset of the following element is known and joins can be computed, 1673 * including possible modification of this element, before mapping to 1674 * Device Space (DS) and passing it on to the outline consumer. 1675 * 1676 */ 1677 FT_LOCAL_DEF( void ) cf2_glyphpath_moveTo(CF2_GlyphPath glyphpath,CF2_Fixed x,CF2_Fixed y)1678 cf2_glyphpath_moveTo( CF2_GlyphPath glyphpath, 1679 CF2_Fixed x, 1680 CF2_Fixed y ) 1681 { 1682 cf2_glyphpath_closeOpenPath( glyphpath ); 1683 1684 /* save the parameters of the move for later, when we'll know how to */ 1685 /* offset it; */ 1686 /* also save last move point */ 1687 glyphpath->currentCS.x = glyphpath->start.x = x; 1688 glyphpath->currentCS.y = glyphpath->start.y = y; 1689 1690 glyphpath->moveIsPending = TRUE; 1691 1692 /* ensure we have a valid map with current mask */ 1693 if ( !cf2_hintmap_isValid( &glyphpath->hintMap ) || 1694 cf2_hintmask_isNew( glyphpath->hintMask ) ) 1695 cf2_hintmap_build( &glyphpath->hintMap, 1696 glyphpath->hStemHintArray, 1697 glyphpath->vStemHintArray, 1698 glyphpath->hintMask, 1699 glyphpath->hintOriginY, 1700 FALSE ); 1701 1702 /* save a copy of current HintMap to use when drawing initial point */ 1703 glyphpath->firstHintMap = glyphpath->hintMap; /* structure copy */ 1704 } 1705 1706 1707 FT_LOCAL_DEF( void ) cf2_glyphpath_lineTo(CF2_GlyphPath glyphpath,CF2_Fixed x,CF2_Fixed y)1708 cf2_glyphpath_lineTo( CF2_GlyphPath glyphpath, 1709 CF2_Fixed x, 1710 CF2_Fixed y ) 1711 { 1712 CF2_Fixed xOffset, yOffset; 1713 FT_Vector P0, P1; 1714 FT_Bool newHintMap; 1715 1716 /* 1717 * New hints will be applied after cf2_glyphpath_pushPrevElem has run. 1718 * In case this is a synthesized closing line, any new hints should be 1719 * delayed until this path is closed (`cf2_hintmask_isNew' will be 1720 * called again before the next line or curve). 1721 */ 1722 1723 /* true if new hint map not on close */ 1724 newHintMap = cf2_hintmask_isNew( glyphpath->hintMask ) && 1725 !glyphpath->pathIsClosing; 1726 1727 /* 1728 * Zero-length lines may occur in the charstring. Because we cannot 1729 * compute darkening offsets or intersections from zero-length lines, 1730 * it is best to remove them and avoid artifacts. However, zero-length 1731 * lines in CS at the start of a new hint map can generate non-zero 1732 * lines in DS due to hint substitution. We detect a change in hint 1733 * map here and pass those zero-length lines along. 1734 */ 1735 1736 /* 1737 * Note: Find explicitly closed paths here with a conditional 1738 * breakpoint using 1739 * 1740 * !gp->pathIsClosing && gp->start.x == x && gp->start.y == y 1741 * 1742 */ 1743 1744 if ( glyphpath->currentCS.x == x && 1745 glyphpath->currentCS.y == y && 1746 !newHintMap ) 1747 /* 1748 * Ignore zero-length lines in CS where the hint map is the same 1749 * because the line in DS will also be zero length. 1750 * 1751 * Ignore zero-length lines when we synthesize a closing line because 1752 * the close will be handled in cf2_glyphPath_pushPrevElem. 1753 */ 1754 return; 1755 1756 cf2_glyphpath_computeOffset( glyphpath, 1757 glyphpath->currentCS.x, 1758 glyphpath->currentCS.y, 1759 x, 1760 y, 1761 &xOffset, 1762 &yOffset ); 1763 1764 /* construct offset points */ 1765 P0.x = ADD_INT32( glyphpath->currentCS.x, xOffset ); 1766 P0.y = ADD_INT32( glyphpath->currentCS.y, yOffset ); 1767 P1.x = ADD_INT32( x, xOffset ); 1768 P1.y = ADD_INT32( y, yOffset ); 1769 1770 if ( glyphpath->moveIsPending ) 1771 { 1772 /* emit offset 1st point as MoveTo */ 1773 cf2_glyphpath_pushMove( glyphpath, P0 ); 1774 1775 glyphpath->moveIsPending = FALSE; /* adjust state machine */ 1776 glyphpath->pathIsOpen = TRUE; 1777 1778 glyphpath->offsetStart1 = P1; /* record second point */ 1779 } 1780 1781 if ( glyphpath->elemIsQueued ) 1782 { 1783 FT_ASSERT( cf2_hintmap_isValid( &glyphpath->hintMap ) || 1784 glyphpath->hintMap.count == 0 ); 1785 1786 cf2_glyphpath_pushPrevElem( glyphpath, 1787 &glyphpath->hintMap, 1788 &P0, 1789 P1, 1790 FALSE ); 1791 } 1792 1793 /* queue the current element with offset points */ 1794 glyphpath->elemIsQueued = TRUE; 1795 glyphpath->prevElemOp = CF2_PathOpLineTo; 1796 glyphpath->prevElemP0 = P0; 1797 glyphpath->prevElemP1 = P1; 1798 1799 /* update current map */ 1800 if ( newHintMap ) 1801 cf2_hintmap_build( &glyphpath->hintMap, 1802 glyphpath->hStemHintArray, 1803 glyphpath->vStemHintArray, 1804 glyphpath->hintMask, 1805 glyphpath->hintOriginY, 1806 FALSE ); 1807 1808 glyphpath->currentCS.x = x; /* pre-offset current point */ 1809 glyphpath->currentCS.y = y; 1810 } 1811 1812 1813 FT_LOCAL_DEF( void ) cf2_glyphpath_curveTo(CF2_GlyphPath glyphpath,CF2_Fixed x1,CF2_Fixed y1,CF2_Fixed x2,CF2_Fixed y2,CF2_Fixed x3,CF2_Fixed y3)1814 cf2_glyphpath_curveTo( CF2_GlyphPath glyphpath, 1815 CF2_Fixed x1, 1816 CF2_Fixed y1, 1817 CF2_Fixed x2, 1818 CF2_Fixed y2, 1819 CF2_Fixed x3, 1820 CF2_Fixed y3 ) 1821 { 1822 CF2_Fixed xOffset1, yOffset1, xOffset3, yOffset3; 1823 FT_Vector P0, P1, P2, P3; 1824 1825 1826 /* TODO: ignore zero length portions of curve?? */ 1827 cf2_glyphpath_computeOffset( glyphpath, 1828 glyphpath->currentCS.x, 1829 glyphpath->currentCS.y, 1830 x1, 1831 y1, 1832 &xOffset1, 1833 &yOffset1 ); 1834 cf2_glyphpath_computeOffset( glyphpath, 1835 x2, 1836 y2, 1837 x3, 1838 y3, 1839 &xOffset3, 1840 &yOffset3 ); 1841 1842 /* add momentum from the middle segment */ 1843 glyphpath->callbacks->windingMomentum = 1844 ADD_INT32( glyphpath->callbacks->windingMomentum, 1845 cf2_getWindingMomentum( x1, y1, x2, y2 ) ); 1846 1847 /* construct offset points */ 1848 P0.x = ADD_INT32( glyphpath->currentCS.x, xOffset1 ); 1849 P0.y = ADD_INT32( glyphpath->currentCS.y, yOffset1 ); 1850 P1.x = ADD_INT32( x1, xOffset1 ); 1851 P1.y = ADD_INT32( y1, yOffset1 ); 1852 /* note: preserve angle of final segment by using offset3 at both ends */ 1853 P2.x = ADD_INT32( x2, xOffset3 ); 1854 P2.y = ADD_INT32( y2, yOffset3 ); 1855 P3.x = ADD_INT32( x3, xOffset3 ); 1856 P3.y = ADD_INT32( y3, yOffset3 ); 1857 1858 if ( glyphpath->moveIsPending ) 1859 { 1860 /* emit offset 1st point as MoveTo */ 1861 cf2_glyphpath_pushMove( glyphpath, P0 ); 1862 1863 glyphpath->moveIsPending = FALSE; 1864 glyphpath->pathIsOpen = TRUE; 1865 1866 glyphpath->offsetStart1 = P1; /* record second point */ 1867 } 1868 1869 if ( glyphpath->elemIsQueued ) 1870 { 1871 FT_ASSERT( cf2_hintmap_isValid( &glyphpath->hintMap ) || 1872 glyphpath->hintMap.count == 0 ); 1873 1874 cf2_glyphpath_pushPrevElem( glyphpath, 1875 &glyphpath->hintMap, 1876 &P0, 1877 P1, 1878 FALSE ); 1879 } 1880 1881 /* queue the current element with offset points */ 1882 glyphpath->elemIsQueued = TRUE; 1883 glyphpath->prevElemOp = CF2_PathOpCubeTo; 1884 glyphpath->prevElemP0 = P0; 1885 glyphpath->prevElemP1 = P1; 1886 glyphpath->prevElemP2 = P2; 1887 glyphpath->prevElemP3 = P3; 1888 1889 /* update current map */ 1890 if ( cf2_hintmask_isNew( glyphpath->hintMask ) ) 1891 cf2_hintmap_build( &glyphpath->hintMap, 1892 glyphpath->hStemHintArray, 1893 glyphpath->vStemHintArray, 1894 glyphpath->hintMask, 1895 glyphpath->hintOriginY, 1896 FALSE ); 1897 1898 glyphpath->currentCS.x = x3; /* pre-offset current point */ 1899 glyphpath->currentCS.y = y3; 1900 } 1901 1902 1903 FT_LOCAL_DEF( void ) cf2_glyphpath_closeOpenPath(CF2_GlyphPath glyphpath)1904 cf2_glyphpath_closeOpenPath( CF2_GlyphPath glyphpath ) 1905 { 1906 if ( glyphpath->pathIsOpen ) 1907 { 1908 /* 1909 * A closing line in Character Space line is always generated below 1910 * with `cf2_glyphPath_lineTo'. It may be ignored later if it turns 1911 * out to be zero length in Device Space. 1912 */ 1913 glyphpath->pathIsClosing = TRUE; 1914 1915 cf2_glyphpath_lineTo( glyphpath, 1916 glyphpath->start.x, 1917 glyphpath->start.y ); 1918 1919 /* empty the final element from the queue and close the path */ 1920 if ( glyphpath->elemIsQueued ) 1921 cf2_glyphpath_pushPrevElem( glyphpath, 1922 &glyphpath->hintMap, 1923 &glyphpath->offsetStart0, 1924 glyphpath->offsetStart1, 1925 TRUE ); 1926 1927 /* reset state machine */ 1928 glyphpath->moveIsPending = TRUE; 1929 glyphpath->pathIsOpen = FALSE; 1930 glyphpath->pathIsClosing = FALSE; 1931 glyphpath->elemIsQueued = FALSE; 1932 } 1933 } 1934 1935 1936 /* END */ 1937