1/***************************************************************************/ 2/* */ 3/* cf2intrp.c */ 4/* */ 5/* Adobe's CFF Interpreter (body). */ 6/* */ 7/* Copyright 2007-2013 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 "cf2ft.h" 40#include FT_INTERNAL_DEBUG_H 41 42#include "cf2glue.h" 43#include "cf2font.h" 44#include "cf2stack.h" 45#include "cf2hints.h" 46 47#include "cf2error.h" 48 49 50 /*************************************************************************/ 51 /* */ 52 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 53 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 54 /* messages during execution. */ 55 /* */ 56#undef FT_COMPONENT 57#define FT_COMPONENT trace_cf2interp 58 59 60 /* some operators are not implemented yet */ 61#define CF2_FIXME FT_TRACE4(( "cf2_interpT2CharString:" \ 62 " operator not implemented yet\n" )) 63 64 65 66 FT_LOCAL_DEF( void ) 67 cf2_hintmask_init( CF2_HintMask hintmask, 68 FT_Error* error ) 69 { 70 FT_ZERO( hintmask ); 71 72 hintmask->error = error; 73 } 74 75 76 FT_LOCAL_DEF( FT_Bool ) 77 cf2_hintmask_isValid( const CF2_HintMask hintmask ) 78 { 79 return hintmask->isValid; 80 } 81 82 83 FT_LOCAL_DEF( FT_Bool ) 84 cf2_hintmask_isNew( const CF2_HintMask hintmask ) 85 { 86 return hintmask->isNew; 87 } 88 89 90 FT_LOCAL_DEF( void ) 91 cf2_hintmask_setNew( CF2_HintMask hintmask, 92 FT_Bool val ) 93 { 94 hintmask->isNew = val; 95 } 96 97 98 /* clients call `getMaskPtr' in order to iterate */ 99 /* through hint mask */ 100 101 FT_LOCAL_DEF( FT_Byte* ) 102 cf2_hintmask_getMaskPtr( CF2_HintMask hintmask ) 103 { 104 return hintmask->mask; 105 } 106 107 108 static size_t 109 cf2_hintmask_setCounts( CF2_HintMask hintmask, 110 size_t bitCount ) 111 { 112 if ( bitCount > CF2_MAX_HINTS ) 113 { 114 /* total of h and v stems must be <= 96 */ 115 CF2_SET_ERROR( hintmask->error, Invalid_Glyph_Format ); 116 return 0; 117 } 118 119 hintmask->bitCount = bitCount; 120 hintmask->byteCount = ( hintmask->bitCount + 7 ) / 8; 121 122 hintmask->isValid = TRUE; 123 hintmask->isNew = TRUE; 124 125 return bitCount; 126 } 127 128 129 /* consume the hintmask bytes from the charstring, advancing the src */ 130 /* pointer */ 131 static void 132 cf2_hintmask_read( CF2_HintMask hintmask, 133 CF2_Buffer charstring, 134 size_t bitCount ) 135 { 136 size_t i; 137 138#ifndef CF2_NDEBUG 139 /* these are the bits in the final mask byte that should be zero */ 140 /* Note: this variable is only used in an assert expression below */ 141 /* and then only if CF2_NDEBUG is not defined */ 142 CF2_UInt mask = ( 1 << ( -(CF2_Int)bitCount & 7 ) ) - 1; 143#endif 144 145 146 /* initialize counts and isValid */ 147 if ( cf2_hintmask_setCounts( hintmask, bitCount ) == 0 ) 148 return; 149 150 FT_ASSERT( hintmask->byteCount > 0 ); 151 152 FT_TRACE4(( " (maskbytes:" )); 153 154 /* set mask and advance interpreter's charstring pointer */ 155 for ( i = 0; i < hintmask->byteCount; i++ ) 156 { 157 hintmask->mask[i] = (FT_Byte)cf2_buf_readByte( charstring ); 158 FT_TRACE4(( " 0x%02X", hintmask->mask[i] )); 159 } 160 161 FT_TRACE4(( ")\n" )); 162 163 /* assert any unused bits in last byte are zero unless there's a prior */ 164 /* error */ 165 /* bitCount -> mask, 0 -> 0, 1 -> 7f, 2 -> 3f, ... 6 -> 3, 7 -> 1 */ 166#ifndef CF2_NDEBUG 167 FT_ASSERT( ( hintmask->mask[hintmask->byteCount - 1] & mask ) == 0 || 168 *hintmask->error ); 169#endif 170 } 171 172 173 FT_LOCAL_DEF( void ) 174 cf2_hintmask_setAll( CF2_HintMask hintmask, 175 size_t bitCount ) 176 { 177 size_t i; 178 CF2_UInt mask = ( 1 << ( -(CF2_Int)bitCount & 7 ) ) - 1; 179 180 181 /* initialize counts and isValid */ 182 if ( cf2_hintmask_setCounts( hintmask, bitCount ) == 0 ) 183 return; 184 185 FT_ASSERT( hintmask->byteCount > 0 ); 186 FT_ASSERT( hintmask->byteCount < 187 sizeof ( hintmask->mask ) / sizeof ( hintmask->mask[0] ) ); 188 189 /* set mask to all ones */ 190 for ( i = 0; i < hintmask->byteCount; i++ ) 191 hintmask->mask[i] = 0xFF; 192 193 /* clear unused bits */ 194 /* bitCount -> mask, 0 -> 0, 1 -> 7f, 2 -> 3f, ... 6 -> 3, 7 -> 1 */ 195 hintmask->mask[hintmask->byteCount - 1] &= ~mask; 196 } 197 198 199 /* Type2 charstring opcodes */ 200 enum 201 { 202 cf2_cmdRESERVED_0, /* 0 */ 203 cf2_cmdHSTEM, /* 1 */ 204 cf2_cmdRESERVED_2, /* 2 */ 205 cf2_cmdVSTEM, /* 3 */ 206 cf2_cmdVMOVETO, /* 4 */ 207 cf2_cmdRLINETO, /* 5 */ 208 cf2_cmdHLINETO, /* 6 */ 209 cf2_cmdVLINETO, /* 7 */ 210 cf2_cmdRRCURVETO, /* 8 */ 211 cf2_cmdRESERVED_9, /* 9 */ 212 cf2_cmdCALLSUBR, /* 10 */ 213 cf2_cmdRETURN, /* 11 */ 214 cf2_cmdESC, /* 12 */ 215 cf2_cmdRESERVED_13, /* 13 */ 216 cf2_cmdENDCHAR, /* 14 */ 217 cf2_cmdRESERVED_15, /* 15 */ 218 cf2_cmdRESERVED_16, /* 16 */ 219 cf2_cmdRESERVED_17, /* 17 */ 220 cf2_cmdHSTEMHM, /* 18 */ 221 cf2_cmdHINTMASK, /* 19 */ 222 cf2_cmdCNTRMASK, /* 20 */ 223 cf2_cmdRMOVETO, /* 21 */ 224 cf2_cmdHMOVETO, /* 22 */ 225 cf2_cmdVSTEMHM, /* 23 */ 226 cf2_cmdRCURVELINE, /* 24 */ 227 cf2_cmdRLINECURVE, /* 25 */ 228 cf2_cmdVVCURVETO, /* 26 */ 229 cf2_cmdHHCURVETO, /* 27 */ 230 cf2_cmdEXTENDEDNMBR, /* 28 */ 231 cf2_cmdCALLGSUBR, /* 29 */ 232 cf2_cmdVHCURVETO, /* 30 */ 233 cf2_cmdHVCURVETO /* 31 */ 234 }; 235 236 enum 237 { 238 cf2_escDOTSECTION, /* 0 */ 239 cf2_escRESERVED_1, /* 1 */ 240 cf2_escRESERVED_2, /* 2 */ 241 cf2_escAND, /* 3 */ 242 cf2_escOR, /* 4 */ 243 cf2_escNOT, /* 5 */ 244 cf2_escRESERVED_6, /* 6 */ 245 cf2_escRESERVED_7, /* 7 */ 246 cf2_escRESERVED_8, /* 8 */ 247 cf2_escABS, /* 9 */ 248 cf2_escADD, /* 10 like otherADD */ 249 cf2_escSUB, /* 11 like otherSUB */ 250 cf2_escDIV, /* 12 */ 251 cf2_escRESERVED_13, /* 13 */ 252 cf2_escNEG, /* 14 */ 253 cf2_escEQ, /* 15 */ 254 cf2_escRESERVED_16, /* 16 */ 255 cf2_escRESERVED_17, /* 17 */ 256 cf2_escDROP, /* 18 */ 257 cf2_escRESERVED_19, /* 19 */ 258 cf2_escPUT, /* 20 like otherPUT */ 259 cf2_escGET, /* 21 like otherGET */ 260 cf2_escIFELSE, /* 22 like otherIFELSE */ 261 cf2_escRANDOM, /* 23 like otherRANDOM */ 262 cf2_escMUL, /* 24 like otherMUL */ 263 cf2_escRESERVED_25, /* 25 */ 264 cf2_escSQRT, /* 26 */ 265 cf2_escDUP, /* 27 like otherDUP */ 266 cf2_escEXCH, /* 28 like otherEXCH */ 267 cf2_escINDEX, /* 29 */ 268 cf2_escROLL, /* 30 */ 269 cf2_escRESERVED_31, /* 31 */ 270 cf2_escRESERVED_32, /* 32 */ 271 cf2_escRESERVED_33, /* 33 */ 272 cf2_escHFLEX, /* 34 */ 273 cf2_escFLEX, /* 35 */ 274 cf2_escHFLEX1, /* 36 */ 275 cf2_escFLEX1 /* 37 */ 276 }; 277 278 279 /* `stemHintArray' does not change once we start drawing the outline. */ 280 static void 281 cf2_doStems( const CF2_Font font, 282 CF2_Stack opStack, 283 CF2_ArrStack stemHintArray, 284 CF2_Fixed* width, 285 FT_Bool* haveWidth, 286 CF2_Fixed hintOffset ) 287 { 288 CF2_UInt i; 289 CF2_UInt count = cf2_stack_count( opStack ); 290 FT_Bool hasWidthArg = count & 1; 291 292 /* variable accumulates delta values from operand stack */ 293 CF2_Fixed position = hintOffset; 294 295 if ( hasWidthArg && ! *haveWidth ) 296 *width = cf2_stack_getReal( opStack, 0 ) + 297 cf2_getNominalWidthX( font->decoder ); 298 299 if ( font->decoder->width_only ) 300 goto exit; 301 302 for ( i = hasWidthArg ? 1 : 0; i < count; i += 2 ) 303 { 304 /* construct a CF2_StemHint and push it onto the list */ 305 CF2_StemHintRec stemhint; 306 307 308 stemhint.min = 309 position += cf2_stack_getReal( opStack, i ); 310 stemhint.max = 311 position += cf2_stack_getReal( opStack, i + 1 ); 312 313 stemhint.used = FALSE; 314 stemhint.maxDS = 315 stemhint.minDS = 0; 316 317 cf2_arrstack_push( stemHintArray, &stemhint ); /* defer error check */ 318 } 319 320 cf2_stack_clear( opStack ); 321 322 exit: 323 /* cf2_doStems must define a width (may be default) */ 324 *haveWidth = TRUE; 325 } 326 327 328 static void 329 cf2_doFlex( CF2_Stack opStack, 330 CF2_Fixed* curX, 331 CF2_Fixed* curY, 332 CF2_GlyphPath glyphPath, 333 const FT_Bool* readFromStack, 334 FT_Bool doConditionalLastRead ) 335 { 336 CF2_Fixed vals[14]; 337 CF2_UInt index; 338 FT_Bool isHFlex; 339 CF2_Int top, i, j; 340 341 342 vals[0] = *curX; 343 vals[1] = *curY; 344 index = 0; 345 isHFlex = readFromStack[9] == FALSE; 346 top = isHFlex ? 9 : 10; 347 348 for ( i = 0; i < top; i++ ) 349 { 350 vals[i + 2] = vals[i]; 351 if ( readFromStack[i] ) 352 vals[i + 2] += cf2_stack_getReal( opStack, index++ ); 353 } 354 355 if ( isHFlex ) 356 vals[9 + 2] = *curY; 357 358 if ( doConditionalLastRead ) 359 { 360 FT_Bool lastIsX = cf2_fixedAbs( vals[10] - *curX ) > 361 cf2_fixedAbs( vals[11] - *curY ); 362 CF2_Fixed lastVal = cf2_stack_getReal( opStack, index ); 363 364 365 if ( lastIsX ) 366 { 367 vals[12] = vals[10] + lastVal; 368 vals[13] = *curY; 369 } 370 else 371 { 372 vals[12] = *curX; 373 vals[13] = vals[11] + lastVal; 374 } 375 } 376 else 377 { 378 if ( readFromStack[10] ) 379 vals[12] = vals[10] + cf2_stack_getReal( opStack, index++ ); 380 else 381 vals[12] = *curX; 382 383 if ( readFromStack[11] ) 384 vals[13] = vals[11] + cf2_stack_getReal( opStack, index ); 385 else 386 vals[13] = *curY; 387 } 388 389 for ( j = 0; j < 2; j++ ) 390 cf2_glyphpath_curveTo( glyphPath, vals[j * 6 + 2], 391 vals[j * 6 + 3], 392 vals[j * 6 + 4], 393 vals[j * 6 + 5], 394 vals[j * 6 + 6], 395 vals[j * 6 + 7] ); 396 397 cf2_stack_clear( opStack ); 398 399 *curX = vals[12]; 400 *curY = vals[13]; 401 } 402 403 404 /* 405 * `error' is a shared error code used by many objects in this 406 * routine. Before the code continues from an error, it must check and 407 * record the error in `*error'. The idea is that this shared 408 * error code will record the first error encountered. If testing 409 * for an error anyway, the cost of `goto exit' is small, so we do it, 410 * even if continuing would be safe. In this case, `lastError' is 411 * set, so the testing and storing can be done in one place, at `exit'. 412 * 413 * Continuing after an error is intended for objects which do their own 414 * testing of `*error', e.g., array stack functions. This allows us to 415 * avoid an extra test after the call. 416 * 417 * Unimplemented opcodes are ignored. 418 * 419 */ 420 FT_LOCAL_DEF( void ) 421 cf2_interpT2CharString( CF2_Font font, 422 CF2_Buffer buf, 423 CF2_OutlineCallbacks callbacks, 424 const FT_Vector* translation, 425 FT_Bool doingSeac, 426 CF2_Fixed curX, 427 CF2_Fixed curY, 428 CF2_Fixed* width ) 429 { 430 /* lastError is used for errors that are immediately tested */ 431 FT_Error lastError = FT_Err_Ok; 432 433 /* pointer to parsed font object */ 434 CFF_Decoder* decoder = font->decoder; 435 436 FT_Error* error = &font->error; 437 FT_Memory memory = font->memory; 438 439 CF2_Fixed scaleY = font->innerTransform.d; 440 CF2_Fixed nominalWidthX = cf2_getNominalWidthX( decoder ); 441 442 /* save this for hinting seac accents */ 443 CF2_Fixed hintOriginY = curY; 444 445 CF2_Stack opStack = NULL; 446 FT_Byte op1; /* first opcode byte */ 447 448 /* instruction limit; 20,000,000 matches Avalon */ 449 FT_UInt32 instructionLimit = 20000000UL; 450 451 CF2_ArrStackRec subrStack; 452 453 FT_Bool haveWidth; 454 CF2_Buffer charstring = NULL; 455 456 CF2_Int charstringIndex = -1; /* initialize to empty */ 457 458 /* TODO: placeholders for hint structures */ 459 460 /* objects used for hinting */ 461 CF2_ArrStackRec hStemHintArray; 462 CF2_ArrStackRec vStemHintArray; 463 464 CF2_HintMaskRec hintMask; 465 CF2_GlyphPathRec glyphPath; 466 467 468 /* initialize the remaining objects */ 469 cf2_arrstack_init( &subrStack, 470 memory, 471 error, 472 sizeof ( CF2_BufferRec ) ); 473 cf2_arrstack_init( &hStemHintArray, 474 memory, 475 error, 476 sizeof ( CF2_StemHintRec ) ); 477 cf2_arrstack_init( &vStemHintArray, 478 memory, 479 error, 480 sizeof ( CF2_StemHintRec ) ); 481 482 /* initialize CF2_StemHint arrays */ 483 cf2_hintmask_init( &hintMask, error ); 484 485 /* initialize path map to manage drawing operations */ 486 487 /* Note: last 4 params are used to handle `MoveToPermissive', which */ 488 /* may need to call `hintMap.Build' */ 489 /* TODO: MoveToPermissive is gone; are these still needed? */ 490 cf2_glyphpath_init( &glyphPath, 491 font, 492 callbacks, 493 scaleY, 494 /* hShift, */ 495 &hStemHintArray, 496 &vStemHintArray, 497 &hintMask, 498 hintOriginY, 499 &font->blues, 500 translation ); 501 502 /* 503 * Initialize state for width parsing. From the CFF Spec: 504 * 505 * The first stack-clearing operator, which must be one of hstem, 506 * hstemhm, vstem, vstemhm, cntrmask, hintmask, hmoveto, vmoveto, 507 * rmoveto, or endchar, takes an additional argument - the width (as 508 * described earlier), which may be expressed as zero or one numeric 509 * argument. 510 * 511 * What we implement here uses the first validly specified width, but 512 * does not detect errors for specifying more than one width. 513 * 514 * If one of the above operators occurs without explicitly specifying 515 * a width, we assume the default width. 516 * 517 */ 518 haveWidth = FALSE; 519 *width = cf2_getDefaultWidthX( decoder ); 520 521 /* 522 * Note: at this point, all pointers to resources must be NULL 523 * and all local objects must be initialized. 524 * There must be no branches to exit: above this point. 525 * 526 */ 527 528 /* allocate an operand stack */ 529 opStack = cf2_stack_init( memory, error ); 530 if ( !opStack ) 531 { 532 lastError = FT_THROW( Out_Of_Memory ); 533 goto exit; 534 } 535 536 /* initialize subroutine stack by placing top level charstring as */ 537 /* first element (max depth plus one for the charstring) */ 538 /* Note: Caller owns and must finalize the first charstring. */ 539 /* Our copy of it does not change that requirement. */ 540 cf2_arrstack_setCount( &subrStack, CF2_MAX_SUBR + 1 ); 541 542 charstring = (CF2_Buffer)cf2_arrstack_getBuffer( &subrStack ); 543 *charstring = *buf; /* structure copy */ 544 545 charstringIndex = 0; /* entry is valid now */ 546 547 /* catch errors so far */ 548 if ( *error ) 549 goto exit; 550 551 /* main interpreter loop */ 552 while ( 1 ) 553 { 554 if ( cf2_buf_isEnd( charstring ) ) 555 { 556 /* If we've reached the end of the charstring, simulate a */ 557 /* cf2_cmdRETURN or cf2_cmdENDCHAR. */ 558 if ( charstringIndex ) 559 op1 = cf2_cmdRETURN; /* end of buffer for subroutine */ 560 else 561 op1 = cf2_cmdENDCHAR; /* end of buffer for top level charstring */ 562 } 563 else 564 op1 = (FT_Byte)cf2_buf_readByte( charstring ); 565 566 /* check for errors once per loop */ 567 if ( *error ) 568 goto exit; 569 570 instructionLimit--; 571 if ( instructionLimit == 0 ) 572 { 573 lastError = FT_THROW( Invalid_Glyph_Format ); 574 goto exit; 575 } 576 577 switch( op1 ) 578 { 579 case cf2_cmdRESERVED_0: 580 case cf2_cmdRESERVED_2: 581 case cf2_cmdRESERVED_9: 582 case cf2_cmdRESERVED_13: 583 case cf2_cmdRESERVED_15: 584 case cf2_cmdRESERVED_16: 585 case cf2_cmdRESERVED_17: 586 /* we may get here if we have a prior error */ 587 FT_TRACE4(( " unknown op (%d)\n", op1 )); 588 break; 589 590 case cf2_cmdHSTEMHM: 591 case cf2_cmdHSTEM: 592 FT_TRACE4(( op1 == cf2_cmdHSTEMHM ? " hstemhm\n" : " hstem\n" )); 593 594 /* never add hints after the mask is computed */ 595 if ( cf2_hintmask_isValid( &hintMask ) ) 596 FT_TRACE4(( "cf2_interpT2CharString:" 597 " invalid horizontal hint mask\n" )); 598 599 cf2_doStems( font, 600 opStack, 601 &hStemHintArray, 602 width, 603 &haveWidth, 604 0 ); 605 606 if ( font->decoder->width_only ) 607 goto exit; 608 609 break; 610 611 case cf2_cmdVSTEMHM: 612 case cf2_cmdVSTEM: 613 FT_TRACE4(( op1 == cf2_cmdVSTEMHM ? " vstemhm\n" : " vstem\n" )); 614 615 /* never add hints after the mask is computed */ 616 if ( cf2_hintmask_isValid( &hintMask ) ) 617 FT_TRACE4(( "cf2_interpT2CharString:" 618 " invalid vertical hint mask\n" )); 619 620 cf2_doStems( font, 621 opStack, 622 &vStemHintArray, 623 width, 624 &haveWidth, 625 0 ); 626 627 if ( font->decoder->width_only ) 628 goto exit; 629 630 break; 631 632 case cf2_cmdVMOVETO: 633 FT_TRACE4(( " vmoveto\n" )); 634 635 if ( cf2_stack_count( opStack ) > 1 && !haveWidth ) 636 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 637 638 /* width is defined or default after this */ 639 haveWidth = TRUE; 640 641 if ( font->decoder->width_only ) 642 goto exit; 643 644 curY += cf2_stack_popFixed( opStack ); 645 646 cf2_glyphpath_moveTo( &glyphPath, curX, curY ); 647 648 break; 649 650 case cf2_cmdRLINETO: 651 { 652 CF2_UInt index; 653 CF2_UInt count = cf2_stack_count( opStack ); 654 655 656 FT_TRACE4(( " rlineto\n" )); 657 658 for ( index = 0; index < count; index += 2 ) 659 { 660 curX += cf2_stack_getReal( opStack, index + 0 ); 661 curY += cf2_stack_getReal( opStack, index + 1 ); 662 663 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 664 } 665 666 cf2_stack_clear( opStack ); 667 } 668 continue; /* no need to clear stack again */ 669 670 case cf2_cmdHLINETO: 671 case cf2_cmdVLINETO: 672 { 673 CF2_UInt index; 674 CF2_UInt count = cf2_stack_count( opStack ); 675 676 FT_Bool isX = op1 == cf2_cmdHLINETO; 677 678 679 FT_TRACE4(( isX ? " hlineto\n" : " vlineto\n" )); 680 681 for ( index = 0; index < count; index++ ) 682 { 683 CF2_Fixed v = cf2_stack_getReal( opStack, index ); 684 685 686 if ( isX ) 687 curX += v; 688 else 689 curY += v; 690 691 isX = !isX; 692 693 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 694 } 695 696 cf2_stack_clear( opStack ); 697 } 698 continue; 699 700 case cf2_cmdRCURVELINE: 701 case cf2_cmdRRCURVETO: 702 { 703 CF2_UInt count = cf2_stack_count( opStack ); 704 CF2_UInt index = 0; 705 706 707 FT_TRACE4(( op1 == cf2_cmdRCURVELINE ? " rcurveline\n" 708 : " rrcurveto\n" )); 709 710 while ( index + 6 <= count ) 711 { 712 CF2_Fixed x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 713 CF2_Fixed y1 = cf2_stack_getReal( opStack, index + 1 ) + curY; 714 CF2_Fixed x2 = cf2_stack_getReal( opStack, index + 2 ) + x1; 715 CF2_Fixed y2 = cf2_stack_getReal( opStack, index + 3 ) + y1; 716 CF2_Fixed x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; 717 CF2_Fixed y3 = cf2_stack_getReal( opStack, index + 5 ) + y2; 718 719 720 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 721 722 curX = x3; 723 curY = y3; 724 index += 6; 725 } 726 727 if ( op1 == cf2_cmdRCURVELINE ) 728 { 729 curX += cf2_stack_getReal( opStack, index + 0 ); 730 curY += cf2_stack_getReal( opStack, index + 1 ); 731 732 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 733 } 734 735 cf2_stack_clear( opStack ); 736 } 737 continue; /* no need to clear stack again */ 738 739 case cf2_cmdCALLGSUBR: 740 case cf2_cmdCALLSUBR: 741 { 742 CF2_UInt subrIndex; 743 744 745 FT_TRACE4(( op1 == cf2_cmdCALLGSUBR ? " callgsubr" 746 : " callsubr" )); 747 748 if ( charstringIndex > CF2_MAX_SUBR ) 749 { 750 /* max subr plus one for charstring */ 751 lastError = FT_THROW( Invalid_Glyph_Format ); 752 goto exit; /* overflow of stack */ 753 } 754 755 /* push our current CFF charstring region on subrStack */ 756 charstring = (CF2_Buffer) 757 cf2_arrstack_getPointer( &subrStack, 758 charstringIndex + 1 ); 759 760 /* set up the new CFF region and pointer */ 761 subrIndex = cf2_stack_popInt( opStack ); 762 763 switch ( op1 ) 764 { 765 case cf2_cmdCALLGSUBR: 766 FT_TRACE4(( "(%d)\n", subrIndex + decoder->globals_bias )); 767 768 if ( cf2_initGlobalRegionBuffer( decoder, 769 subrIndex, 770 charstring ) ) 771 { 772 lastError = FT_THROW( Invalid_Glyph_Format ); 773 goto exit; /* subroutine lookup or stream error */ 774 } 775 break; 776 777 default: 778 /* cf2_cmdCALLSUBR */ 779 FT_TRACE4(( "(%d)\n", subrIndex + decoder->locals_bias )); 780 781 if ( cf2_initLocalRegionBuffer( decoder, 782 subrIndex, 783 charstring ) ) 784 { 785 lastError = FT_THROW( Invalid_Glyph_Format ); 786 goto exit; /* subroutine lookup or stream error */ 787 } 788 } 789 790 charstringIndex += 1; /* entry is valid now */ 791 } 792 continue; /* do not clear the stack */ 793 794 case cf2_cmdRETURN: 795 FT_TRACE4(( " return\n" )); 796 797 if ( charstringIndex < 1 ) 798 { 799 /* Note: cannot return from top charstring */ 800 lastError = FT_THROW( Invalid_Glyph_Format ); 801 goto exit; /* underflow of stack */ 802 } 803 804 /* restore position in previous charstring */ 805 charstring = (CF2_Buffer) 806 cf2_arrstack_getPointer( &subrStack, 807 --charstringIndex ); 808 continue; /* do not clear the stack */ 809 810 case cf2_cmdESC: 811 { 812 FT_Byte op2 = (FT_Byte)cf2_buf_readByte( charstring ); 813 814 815 switch ( op2 ) 816 { 817 case cf2_escDOTSECTION: 818 /* something about `flip type of locking' -- ignore it */ 819 FT_TRACE4(( " dotsection\n" )); 820 821 break; 822 823 /* TODO: should these operators be supported? */ 824 case cf2_escAND: /* in spec */ 825 FT_TRACE4(( " and\n" )); 826 827 CF2_FIXME; 828 break; 829 830 case cf2_escOR: /* in spec */ 831 FT_TRACE4(( " or\n" )); 832 833 CF2_FIXME; 834 break; 835 836 case cf2_escNOT: /* in spec */ 837 FT_TRACE4(( " not\n" )); 838 839 CF2_FIXME; 840 break; 841 842 case cf2_escABS: /* in spec */ 843 FT_TRACE4(( " abs\n" )); 844 845 CF2_FIXME; 846 break; 847 848 case cf2_escADD: /* in spec */ 849 FT_TRACE4(( " add\n" )); 850 851 CF2_FIXME; 852 break; 853 854 case cf2_escSUB: /* in spec */ 855 FT_TRACE4(( " sub\n" )); 856 857 CF2_FIXME; 858 break; 859 860 case cf2_escDIV: /* in spec */ 861 FT_TRACE4(( " div\n" )); 862 863 CF2_FIXME; 864 break; 865 866 case cf2_escNEG: /* in spec */ 867 FT_TRACE4(( " neg\n" )); 868 869 CF2_FIXME; 870 break; 871 872 case cf2_escEQ: /* in spec */ 873 FT_TRACE4(( " eq\n" )); 874 875 CF2_FIXME; 876 break; 877 878 case cf2_escDROP: /* in spec */ 879 FT_TRACE4(( " drop\n" )); 880 881 CF2_FIXME; 882 break; 883 884 case cf2_escPUT: /* in spec */ 885 FT_TRACE4(( " put\n" )); 886 887 CF2_FIXME; 888 break; 889 890 case cf2_escGET: /* in spec */ 891 FT_TRACE4(( " get\n" )); 892 893 CF2_FIXME; 894 break; 895 896 case cf2_escIFELSE: /* in spec */ 897 FT_TRACE4(( " ifelse\n" )); 898 899 CF2_FIXME; 900 break; 901 902 case cf2_escRANDOM: /* in spec */ 903 FT_TRACE4(( " random\n" )); 904 905 CF2_FIXME; 906 break; 907 908 case cf2_escMUL: /* in spec */ 909 FT_TRACE4(( " mul\n" )); 910 911 CF2_FIXME; 912 break; 913 914 case cf2_escSQRT: /* in spec */ 915 FT_TRACE4(( " sqrt\n" )); 916 917 CF2_FIXME; 918 break; 919 920 case cf2_escDUP: /* in spec */ 921 FT_TRACE4(( " dup\n" )); 922 923 CF2_FIXME; 924 break; 925 926 case cf2_escEXCH: /* in spec */ 927 FT_TRACE4(( " exch\n" )); 928 929 CF2_FIXME; 930 break; 931 932 case cf2_escINDEX: /* in spec */ 933 FT_TRACE4(( " index\n" )); 934 935 CF2_FIXME; 936 break; 937 938 case cf2_escROLL: /* in spec */ 939 FT_TRACE4(( " roll\n" )); 940 941 CF2_FIXME; 942 break; 943 944 case cf2_escHFLEX: 945 { 946 static const FT_Bool readFromStack[12] = 947 { 948 TRUE /* dx1 */, FALSE /* dy1 */, 949 TRUE /* dx2 */, TRUE /* dy2 */, 950 TRUE /* dx3 */, FALSE /* dy3 */, 951 TRUE /* dx4 */, FALSE /* dy4 */, 952 TRUE /* dx5 */, FALSE /* dy5 */, 953 TRUE /* dx6 */, FALSE /* dy6 */ 954 }; 955 956 957 FT_TRACE4(( " hflex\n" )); 958 959 cf2_doFlex( opStack, 960 &curX, 961 &curY, 962 &glyphPath, 963 readFromStack, 964 FALSE /* doConditionalLastRead */ ); 965 } 966 continue; 967 968 case cf2_escFLEX: 969 { 970 static const FT_Bool readFromStack[12] = 971 { 972 TRUE /* dx1 */, TRUE /* dy1 */, 973 TRUE /* dx2 */, TRUE /* dy2 */, 974 TRUE /* dx3 */, TRUE /* dy3 */, 975 TRUE /* dx4 */, TRUE /* dy4 */, 976 TRUE /* dx5 */, TRUE /* dy5 */, 977 TRUE /* dx6 */, TRUE /* dy6 */ 978 }; 979 980 981 FT_TRACE4(( " flex\n" )); 982 983 cf2_doFlex( opStack, 984 &curX, 985 &curY, 986 &glyphPath, 987 readFromStack, 988 FALSE /* doConditionalLastRead */ ); 989 } 990 break; /* TODO: why is this not a continue? */ 991 992 case cf2_escHFLEX1: 993 { 994 static const FT_Bool readFromStack[12] = 995 { 996 TRUE /* dx1 */, TRUE /* dy1 */, 997 TRUE /* dx2 */, TRUE /* dy2 */, 998 TRUE /* dx3 */, FALSE /* dy3 */, 999 TRUE /* dx4 */, FALSE /* dy4 */, 1000 TRUE /* dx5 */, TRUE /* dy5 */, 1001 TRUE /* dx6 */, FALSE /* dy6 */ 1002 }; 1003 1004 1005 FT_TRACE4(( " hflex1\n" )); 1006 1007 cf2_doFlex( opStack, 1008 &curX, 1009 &curY, 1010 &glyphPath, 1011 readFromStack, 1012 FALSE /* doConditionalLastRead */ ); 1013 } 1014 continue; 1015 1016 case cf2_escFLEX1: 1017 { 1018 static const FT_Bool readFromStack[12] = 1019 { 1020 TRUE /* dx1 */, TRUE /* dy1 */, 1021 TRUE /* dx2 */, TRUE /* dy2 */, 1022 TRUE /* dx3 */, TRUE /* dy3 */, 1023 TRUE /* dx4 */, TRUE /* dy4 */, 1024 TRUE /* dx5 */, TRUE /* dy5 */, 1025 FALSE /* dx6 */, FALSE /* dy6 */ 1026 }; 1027 1028 1029 FT_TRACE4(( " flex1\n" )); 1030 1031 cf2_doFlex( opStack, 1032 &curX, 1033 &curY, 1034 &glyphPath, 1035 readFromStack, 1036 TRUE /* doConditionalLastRead */ ); 1037 } 1038 continue; 1039 1040 case cf2_escRESERVED_1: 1041 case cf2_escRESERVED_2: 1042 case cf2_escRESERVED_6: 1043 case cf2_escRESERVED_7: 1044 case cf2_escRESERVED_8: 1045 case cf2_escRESERVED_13: 1046 case cf2_escRESERVED_16: 1047 case cf2_escRESERVED_17: 1048 case cf2_escRESERVED_19: 1049 case cf2_escRESERVED_25: 1050 case cf2_escRESERVED_31: 1051 case cf2_escRESERVED_32: 1052 case cf2_escRESERVED_33: 1053 default: 1054 FT_TRACE4(( " unknown op (12, %d)\n", op2 )); 1055 1056 }; /* end of switch statement checking `op2' */ 1057 1058 } /* case cf2_cmdESC */ 1059 break; 1060 1061 case cf2_cmdENDCHAR: 1062 FT_TRACE4(( " endchar\n" )); 1063 1064 if ( cf2_stack_count( opStack ) == 1 || 1065 cf2_stack_count( opStack ) == 5 ) 1066 { 1067 if ( !haveWidth ) 1068 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 1069 } 1070 1071 /* width is defined or default after this */ 1072 haveWidth = TRUE; 1073 1074 if ( font->decoder->width_only ) 1075 goto exit; 1076 1077 /* close path if still open */ 1078 cf2_glyphpath_closeOpenPath( &glyphPath ); 1079 1080 if ( cf2_stack_count( opStack ) > 1 ) 1081 { 1082 /* must be either 4 or 5 -- */ 1083 /* this is a (deprecated) implied `seac' operator */ 1084 1085 CF2_UInt achar; 1086 CF2_UInt bchar; 1087 CF2_BufferRec component; 1088 CF2_Fixed dummyWidth; /* ignore component width */ 1089 FT_Error error2; 1090 1091 1092 if ( doingSeac ) 1093 { 1094 lastError = FT_THROW( Invalid_Glyph_Format ); 1095 goto exit; /* nested seac */ 1096 } 1097 1098 achar = cf2_stack_popInt( opStack ); 1099 bchar = cf2_stack_popInt( opStack ); 1100 1101 curY = cf2_stack_popFixed( opStack ); 1102 curX = cf2_stack_popFixed( opStack ); 1103 1104 error2 = cf2_getSeacComponent( decoder, achar, &component ); 1105 if ( error2 ) 1106 { 1107 lastError = error2; /* pass FreeType error through */ 1108 goto exit; 1109 } 1110 cf2_interpT2CharString( font, 1111 &component, 1112 callbacks, 1113 translation, 1114 TRUE, 1115 curX, 1116 curY, 1117 &dummyWidth ); 1118 cf2_freeSeacComponent( decoder, &component ); 1119 1120 error2 = cf2_getSeacComponent( decoder, bchar, &component ); 1121 if ( error2 ) 1122 { 1123 lastError = error2; /* pass FreeType error through */ 1124 goto exit; 1125 } 1126 cf2_interpT2CharString( font, 1127 &component, 1128 callbacks, 1129 translation, 1130 TRUE, 1131 0, 1132 0, 1133 &dummyWidth ); 1134 cf2_freeSeacComponent( decoder, &component ); 1135 } 1136 goto exit; 1137 1138 case cf2_cmdCNTRMASK: 1139 case cf2_cmdHINTMASK: 1140 /* the final \n in the tracing message gets added in */ 1141 /* `cf2_hintmask_read' (which also traces the mask bytes) */ 1142 FT_TRACE4(( op1 == cf2_cmdCNTRMASK ? " cntrmask" : " hintmask" )); 1143 1144 /* if there are arguments on the stack, there this is an */ 1145 /* implied cf2_cmdVSTEMHM */ 1146 if ( cf2_stack_count( opStack ) != 0 ) 1147 { 1148 /* never add hints after the mask is computed */ 1149 if ( cf2_hintmask_isValid( &hintMask ) ) 1150 FT_TRACE4(( "cf2_interpT2CharString: invalid hint mask\n" )); 1151 } 1152 1153 cf2_doStems( font, 1154 opStack, 1155 &vStemHintArray, 1156 width, 1157 &haveWidth, 1158 0 ); 1159 1160 if ( font->decoder->width_only ) 1161 goto exit; 1162 1163 if ( op1 == cf2_cmdHINTMASK ) 1164 { 1165 /* consume the hint mask bytes which follow the operator */ 1166 cf2_hintmask_read( &hintMask, 1167 charstring, 1168 cf2_arrstack_size( &hStemHintArray ) + 1169 cf2_arrstack_size( &vStemHintArray ) ); 1170 } 1171 else 1172 { 1173 /* 1174 * Consume the counter mask bytes which follow the operator: 1175 * Build a temporary hint map, just to place and lock those 1176 * stems participating in the counter mask. These are most 1177 * likely the dominant hstems, and are grouped together in a 1178 * few counter groups, not necessarily in correspondence 1179 * with the hint groups. This reduces the chances of 1180 * conflicts between hstems that are initially placed in 1181 * separate hint groups and then brought together. The 1182 * positions are copied back to `hStemHintArray', so we can 1183 * discard `counterMask' and `counterHintMap'. 1184 * 1185 */ 1186 CF2_HintMapRec counterHintMap; 1187 CF2_HintMaskRec counterMask; 1188 1189 1190 cf2_hintmap_init( &counterHintMap, 1191 font, 1192 &glyphPath.initialHintMap, 1193 &glyphPath.hintMoves, 1194 scaleY ); 1195 cf2_hintmask_init( &counterMask, error ); 1196 1197 cf2_hintmask_read( &counterMask, 1198 charstring, 1199 cf2_arrstack_size( &hStemHintArray ) + 1200 cf2_arrstack_size( &vStemHintArray ) ); 1201 cf2_hintmap_build( &counterHintMap, 1202 &hStemHintArray, 1203 &vStemHintArray, 1204 &counterMask, 1205 0, 1206 FALSE ); 1207 } 1208 break; 1209 1210 case cf2_cmdRMOVETO: 1211 FT_TRACE4(( " rmoveto\n" )); 1212 1213 if ( cf2_stack_count( opStack ) > 2 && !haveWidth ) 1214 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 1215 1216 /* width is defined or default after this */ 1217 haveWidth = TRUE; 1218 1219 if ( font->decoder->width_only ) 1220 goto exit; 1221 1222 curY += cf2_stack_popFixed( opStack ); 1223 curX += cf2_stack_popFixed( opStack ); 1224 1225 cf2_glyphpath_moveTo( &glyphPath, curX, curY ); 1226 1227 break; 1228 1229 case cf2_cmdHMOVETO: 1230 FT_TRACE4(( " hmoveto\n" )); 1231 1232 if ( cf2_stack_count( opStack ) > 1 && !haveWidth ) 1233 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 1234 1235 /* width is defined or default after this */ 1236 haveWidth = TRUE; 1237 1238 if ( font->decoder->width_only ) 1239 goto exit; 1240 1241 curX += cf2_stack_popFixed( opStack ); 1242 1243 cf2_glyphpath_moveTo( &glyphPath, curX, curY ); 1244 1245 break; 1246 1247 case cf2_cmdRLINECURVE: 1248 { 1249 CF2_UInt count = cf2_stack_count( opStack ); 1250 CF2_UInt index = 0; 1251 1252 1253 FT_TRACE4(( " rlinecurve\n" )); 1254 1255 while ( index + 6 < count ) 1256 { 1257 curX += cf2_stack_getReal( opStack, index + 0 ); 1258 curY += cf2_stack_getReal( opStack, index + 1 ); 1259 1260 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 1261 index += 2; 1262 } 1263 1264 while ( index < count ) 1265 { 1266 CF2_Fixed x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 1267 CF2_Fixed y1 = cf2_stack_getReal( opStack, index + 1 ) + curY; 1268 CF2_Fixed x2 = cf2_stack_getReal( opStack, index + 2 ) + x1; 1269 CF2_Fixed y2 = cf2_stack_getReal( opStack, index + 3 ) + y1; 1270 CF2_Fixed x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; 1271 CF2_Fixed y3 = cf2_stack_getReal( opStack, index + 5 ) + y2; 1272 1273 1274 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1275 1276 curX = x3; 1277 curY = y3; 1278 index += 6; 1279 } 1280 1281 cf2_stack_clear( opStack ); 1282 } 1283 continue; /* no need to clear stack again */ 1284 1285 case cf2_cmdVVCURVETO: 1286 { 1287 CF2_UInt count = cf2_stack_count( opStack ); 1288 CF2_UInt index = 0; 1289 1290 1291 FT_TRACE4(( " vvcurveto\n" )); 1292 1293 while ( index < count ) 1294 { 1295 CF2_Fixed x1, y1, x2, y2, x3, y3; 1296 1297 1298 if ( ( count - index ) & 1 ) 1299 { 1300 x1 = cf2_stack_getReal( opStack, index ) + curX; 1301 1302 ++index; 1303 } 1304 else 1305 x1 = curX; 1306 1307 y1 = cf2_stack_getReal( opStack, index + 0 ) + curY; 1308 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1309 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1310 x3 = x2; 1311 y3 = cf2_stack_getReal( opStack, index + 3 ) + y2; 1312 1313 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1314 1315 curX = x3; 1316 curY = y3; 1317 index += 4; 1318 } 1319 1320 cf2_stack_clear( opStack ); 1321 } 1322 continue; /* no need to clear stack again */ 1323 1324 case cf2_cmdHHCURVETO: 1325 { 1326 CF2_UInt count = cf2_stack_count( opStack ); 1327 CF2_UInt index = 0; 1328 1329 1330 FT_TRACE4(( " hhcurveto\n" )); 1331 1332 while ( index < count ) 1333 { 1334 CF2_Fixed x1, y1, x2, y2, x3, y3; 1335 1336 1337 if ( ( count - index ) & 1 ) 1338 { 1339 y1 = cf2_stack_getReal( opStack, index ) + curY; 1340 1341 ++index; 1342 } 1343 else 1344 y1 = curY; 1345 1346 x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 1347 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1348 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1349 x3 = cf2_stack_getReal( opStack, index + 3 ) + x2; 1350 y3 = y2; 1351 1352 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1353 1354 curX = x3; 1355 curY = y3; 1356 index += 4; 1357 } 1358 1359 cf2_stack_clear( opStack ); 1360 } 1361 continue; /* no need to clear stack again */ 1362 1363 case cf2_cmdVHCURVETO: 1364 case cf2_cmdHVCURVETO: 1365 { 1366 CF2_UInt count = cf2_stack_count( opStack ); 1367 CF2_UInt index = 0; 1368 1369 FT_Bool alternate = op1 == cf2_cmdHVCURVETO; 1370 1371 1372 FT_TRACE4(( alternate ? " hvcurveto\n" : " vhcurveto\n" )); 1373 1374 while ( index < count ) 1375 { 1376 CF2_Fixed x1, x2, x3, y1, y2, y3; 1377 1378 1379 if ( alternate ) 1380 { 1381 x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 1382 y1 = curY; 1383 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1384 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1385 y3 = cf2_stack_getReal( opStack, index + 3 ) + y2; 1386 1387 if ( count - index == 5 ) 1388 { 1389 x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; 1390 1391 ++index; 1392 } 1393 else 1394 x3 = x2; 1395 1396 alternate = FALSE; 1397 } 1398 else 1399 { 1400 x1 = curX; 1401 y1 = cf2_stack_getReal( opStack, index + 0 ) + curY; 1402 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1403 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1404 x3 = cf2_stack_getReal( opStack, index + 3 ) + x2; 1405 1406 if ( count - index == 5 ) 1407 { 1408 y3 = cf2_stack_getReal( opStack, index + 4 ) + y2; 1409 1410 ++index; 1411 } 1412 else 1413 y3 = y2; 1414 1415 alternate = TRUE; 1416 } 1417 1418 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1419 1420 curX = x3; 1421 curY = y3; 1422 index += 4; 1423 } 1424 1425 cf2_stack_clear( opStack ); 1426 } 1427 continue; /* no need to clear stack again */ 1428 1429 case cf2_cmdEXTENDEDNMBR: 1430 { 1431 CF2_Int v; 1432 1433 1434 v = (FT_Short)( ( cf2_buf_readByte( charstring ) << 8 ) | 1435 cf2_buf_readByte( charstring ) ); 1436 1437 FT_TRACE4(( " %d", v )); 1438 1439 cf2_stack_pushInt( opStack, v ); 1440 } 1441 continue; 1442 1443 default: 1444 /* numbers */ 1445 { 1446 if ( /* op1 >= 32 && */ op1 <= 246 ) 1447 { 1448 CF2_Int v; 1449 1450 1451 v = op1 - 139; 1452 1453 FT_TRACE4(( " %d", v )); 1454 1455 /* -107 .. 107 */ 1456 cf2_stack_pushInt( opStack, v ); 1457 } 1458 1459 else if ( /* op1 >= 247 && */ op1 <= 250 ) 1460 { 1461 CF2_Int v; 1462 1463 1464 v = op1; 1465 v -= 247; 1466 v *= 256; 1467 v += cf2_buf_readByte( charstring ); 1468 v += 108; 1469 1470 FT_TRACE4(( " %d", v )); 1471 1472 /* 108 .. 1131 */ 1473 cf2_stack_pushInt( opStack, v ); 1474 } 1475 1476 else if ( /* op1 >= 251 && */ op1 <= 254 ) 1477 { 1478 CF2_Int v; 1479 1480 1481 v = op1; 1482 v -= 251; 1483 v *= 256; 1484 v += cf2_buf_readByte( charstring ); 1485 v = -v - 108; 1486 1487 FT_TRACE4(( " %d", v )); 1488 1489 /* -1131 .. -108 */ 1490 cf2_stack_pushInt( opStack, v ); 1491 } 1492 1493 else /* op1 == 255 */ 1494 { 1495 CF2_Fixed v; 1496 1497 1498 v = (CF2_Fixed) 1499 ( ( (FT_UInt32)cf2_buf_readByte( charstring ) << 24 ) | 1500 ( (FT_UInt32)cf2_buf_readByte( charstring ) << 16 ) | 1501 ( (FT_UInt32)cf2_buf_readByte( charstring ) << 8 ) | 1502 (FT_UInt32)cf2_buf_readByte( charstring ) ); 1503 1504 FT_TRACE4(( " %.2f", v / 65536.0 )); 1505 1506 cf2_stack_pushFixed( opStack, v ); 1507 } 1508 } 1509 continue; /* don't clear stack */ 1510 1511 } /* end of switch statement checking `op1' */ 1512 1513 cf2_stack_clear( opStack ); 1514 1515 } /* end of main interpreter loop */ 1516 1517 /* we get here if the charstring ends without cf2_cmdENDCHAR */ 1518 FT_TRACE4(( "cf2_interpT2CharString:" 1519 " charstring ends without ENDCHAR\n" )); 1520 1521 exit: 1522 /* check whether last error seen is also the first one */ 1523 cf2_setError( error, lastError ); 1524 1525 /* free resources from objects we've used */ 1526 cf2_glyphpath_finalize( &glyphPath ); 1527 cf2_arrstack_finalize( &vStemHintArray ); 1528 cf2_arrstack_finalize( &hStemHintArray ); 1529 cf2_arrstack_finalize( &subrStack ); 1530 cf2_stack_free( opStack ); 1531 1532 FT_TRACE4(( "\n" )); 1533 1534 return; 1535 } 1536 1537 1538/* END */ 1539