1 /***************************************************************************/ 2 /* */ 3 /* cf2intrp.c */ 4 /* */ 5 /* Adobe's CFF Interpreter (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 "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 #include "cf2intrp.h" 47 48 #include "cf2error.h" 49 50 51 /*************************************************************************/ 52 /* */ 53 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 54 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 55 /* messages during execution. */ 56 /* */ 57 #undef FT_COMPONENT 58 #define FT_COMPONENT trace_cf2interp 59 60 61 /* some operators are not implemented yet */ 62 #define CF2_FIXME FT_TRACE4(( "cf2_interpT2CharString:" \ 63 " operator not implemented yet\n" )) 64 65 66 67 FT_LOCAL_DEF( void ) cf2_hintmask_init(CF2_HintMask hintmask,FT_Error * error)68 cf2_hintmask_init( CF2_HintMask hintmask, 69 FT_Error* error ) 70 { 71 FT_ZERO( hintmask ); 72 73 hintmask->error = error; 74 } 75 76 77 FT_LOCAL_DEF( FT_Bool ) cf2_hintmask_isValid(const CF2_HintMask hintmask)78 cf2_hintmask_isValid( const CF2_HintMask hintmask ) 79 { 80 return hintmask->isValid; 81 } 82 83 84 FT_LOCAL_DEF( FT_Bool ) cf2_hintmask_isNew(const CF2_HintMask hintmask)85 cf2_hintmask_isNew( const CF2_HintMask hintmask ) 86 { 87 return hintmask->isNew; 88 } 89 90 91 FT_LOCAL_DEF( void ) cf2_hintmask_setNew(CF2_HintMask hintmask,FT_Bool val)92 cf2_hintmask_setNew( CF2_HintMask hintmask, 93 FT_Bool val ) 94 { 95 hintmask->isNew = val; 96 } 97 98 99 /* clients call `getMaskPtr' in order to iterate */ 100 /* through hint mask */ 101 102 FT_LOCAL_DEF( FT_Byte* ) cf2_hintmask_getMaskPtr(CF2_HintMask hintmask)103 cf2_hintmask_getMaskPtr( CF2_HintMask hintmask ) 104 { 105 return hintmask->mask; 106 } 107 108 109 static size_t cf2_hintmask_setCounts(CF2_HintMask hintmask,size_t bitCount)110 cf2_hintmask_setCounts( CF2_HintMask hintmask, 111 size_t bitCount ) 112 { 113 if ( bitCount > CF2_MAX_HINTS ) 114 { 115 /* total of h and v stems must be <= 96 */ 116 CF2_SET_ERROR( hintmask->error, Invalid_Glyph_Format ); 117 return 0; 118 } 119 120 hintmask->bitCount = bitCount; 121 hintmask->byteCount = ( hintmask->bitCount + 7 ) / 8; 122 123 hintmask->isValid = TRUE; 124 hintmask->isNew = TRUE; 125 126 return bitCount; 127 } 128 129 130 /* consume the hintmask bytes from the charstring, advancing the src */ 131 /* pointer */ 132 static void cf2_hintmask_read(CF2_HintMask hintmask,CF2_Buffer charstring,size_t bitCount)133 cf2_hintmask_read( CF2_HintMask hintmask, 134 CF2_Buffer charstring, 135 size_t bitCount ) 136 { 137 size_t i; 138 139 #ifndef CF2_NDEBUG 140 /* these are the bits in the final mask byte that should be zero */ 141 /* Note: this variable is only used in an assert expression below */ 142 /* and then only if CF2_NDEBUG is not defined */ 143 CF2_UInt mask = ( 1 << ( -(CF2_Int)bitCount & 7 ) ) - 1; 144 #endif 145 146 147 /* initialize counts and isValid */ 148 if ( cf2_hintmask_setCounts( hintmask, bitCount ) == 0 ) 149 return; 150 151 FT_ASSERT( hintmask->byteCount > 0 ); 152 153 FT_TRACE4(( " (maskbytes:" )); 154 155 /* set mask and advance interpreter's charstring pointer */ 156 for ( i = 0; i < hintmask->byteCount; i++ ) 157 { 158 hintmask->mask[i] = (FT_Byte)cf2_buf_readByte( charstring ); 159 FT_TRACE4(( " 0x%02X", hintmask->mask[i] )); 160 } 161 162 FT_TRACE4(( ")\n" )); 163 164 /* assert any unused bits in last byte are zero unless there's a prior */ 165 /* error */ 166 /* bitCount -> mask, 0 -> 0, 1 -> 7f, 2 -> 3f, ... 6 -> 3, 7 -> 1 */ 167 #ifndef CF2_NDEBUG 168 FT_ASSERT( ( hintmask->mask[hintmask->byteCount - 1] & mask ) == 0 || 169 *hintmask->error ); 170 #endif 171 } 172 173 174 FT_LOCAL_DEF( void ) cf2_hintmask_setAll(CF2_HintMask hintmask,size_t bitCount)175 cf2_hintmask_setAll( CF2_HintMask hintmask, 176 size_t bitCount ) 177 { 178 size_t i; 179 CF2_UInt mask = ( 1 << ( -(CF2_Int)bitCount & 7 ) ) - 1; 180 181 182 /* initialize counts and isValid */ 183 if ( cf2_hintmask_setCounts( hintmask, bitCount ) == 0 ) 184 return; 185 186 FT_ASSERT( hintmask->byteCount > 0 ); 187 FT_ASSERT( hintmask->byteCount <= 188 sizeof ( hintmask->mask ) / sizeof ( hintmask->mask[0] ) ); 189 190 /* set mask to all ones */ 191 for ( i = 0; i < hintmask->byteCount; i++ ) 192 hintmask->mask[i] = 0xFF; 193 194 /* clear unused bits */ 195 /* bitCount -> mask, 0 -> 0, 1 -> 7f, 2 -> 3f, ... 6 -> 3, 7 -> 1 */ 196 hintmask->mask[hintmask->byteCount - 1] &= ~mask; 197 } 198 199 200 /* Type2 charstring opcodes */ 201 enum 202 { 203 cf2_cmdRESERVED_0, /* 0 */ 204 cf2_cmdHSTEM, /* 1 */ 205 cf2_cmdRESERVED_2, /* 2 */ 206 cf2_cmdVSTEM, /* 3 */ 207 cf2_cmdVMOVETO, /* 4 */ 208 cf2_cmdRLINETO, /* 5 */ 209 cf2_cmdHLINETO, /* 6 */ 210 cf2_cmdVLINETO, /* 7 */ 211 cf2_cmdRRCURVETO, /* 8 */ 212 cf2_cmdRESERVED_9, /* 9 */ 213 cf2_cmdCALLSUBR, /* 10 */ 214 cf2_cmdRETURN, /* 11 */ 215 cf2_cmdESC, /* 12 */ 216 cf2_cmdRESERVED_13, /* 13 */ 217 cf2_cmdENDCHAR, /* 14 */ 218 cf2_cmdRESERVED_15, /* 15 */ 219 cf2_cmdRESERVED_16, /* 16 */ 220 cf2_cmdRESERVED_17, /* 17 */ 221 cf2_cmdHSTEMHM, /* 18 */ 222 cf2_cmdHINTMASK, /* 19 */ 223 cf2_cmdCNTRMASK, /* 20 */ 224 cf2_cmdRMOVETO, /* 21 */ 225 cf2_cmdHMOVETO, /* 22 */ 226 cf2_cmdVSTEMHM, /* 23 */ 227 cf2_cmdRCURVELINE, /* 24 */ 228 cf2_cmdRLINECURVE, /* 25 */ 229 cf2_cmdVVCURVETO, /* 26 */ 230 cf2_cmdHHCURVETO, /* 27 */ 231 cf2_cmdEXTENDEDNMBR, /* 28 */ 232 cf2_cmdCALLGSUBR, /* 29 */ 233 cf2_cmdVHCURVETO, /* 30 */ 234 cf2_cmdHVCURVETO /* 31 */ 235 }; 236 237 enum 238 { 239 cf2_escDOTSECTION, /* 0 */ 240 cf2_escRESERVED_1, /* 1 */ 241 cf2_escRESERVED_2, /* 2 */ 242 cf2_escAND, /* 3 */ 243 cf2_escOR, /* 4 */ 244 cf2_escNOT, /* 5 */ 245 cf2_escRESERVED_6, /* 6 */ 246 cf2_escRESERVED_7, /* 7 */ 247 cf2_escRESERVED_8, /* 8 */ 248 cf2_escABS, /* 9 */ 249 cf2_escADD, /* 10 like otherADD */ 250 cf2_escSUB, /* 11 like otherSUB */ 251 cf2_escDIV, /* 12 */ 252 cf2_escRESERVED_13, /* 13 */ 253 cf2_escNEG, /* 14 */ 254 cf2_escEQ, /* 15 */ 255 cf2_escRESERVED_16, /* 16 */ 256 cf2_escRESERVED_17, /* 17 */ 257 cf2_escDROP, /* 18 */ 258 cf2_escRESERVED_19, /* 19 */ 259 cf2_escPUT, /* 20 like otherPUT */ 260 cf2_escGET, /* 21 like otherGET */ 261 cf2_escIFELSE, /* 22 like otherIFELSE */ 262 cf2_escRANDOM, /* 23 like otherRANDOM */ 263 cf2_escMUL, /* 24 like otherMUL */ 264 cf2_escRESERVED_25, /* 25 */ 265 cf2_escSQRT, /* 26 */ 266 cf2_escDUP, /* 27 like otherDUP */ 267 cf2_escEXCH, /* 28 like otherEXCH */ 268 cf2_escINDEX, /* 29 */ 269 cf2_escROLL, /* 30 */ 270 cf2_escRESERVED_31, /* 31 */ 271 cf2_escRESERVED_32, /* 32 */ 272 cf2_escRESERVED_33, /* 33 */ 273 cf2_escHFLEX, /* 34 */ 274 cf2_escFLEX, /* 35 */ 275 cf2_escHFLEX1, /* 36 */ 276 cf2_escFLEX1 /* 37 */ 277 }; 278 279 280 /* `stemHintArray' does not change once we start drawing the outline. */ 281 static void cf2_doStems(const CF2_Font font,CF2_Stack opStack,CF2_ArrStack stemHintArray,CF2_Fixed * width,FT_Bool * haveWidth,CF2_Fixed hintOffset)282 cf2_doStems( const CF2_Font font, 283 CF2_Stack opStack, 284 CF2_ArrStack stemHintArray, 285 CF2_Fixed* width, 286 FT_Bool* haveWidth, 287 CF2_Fixed hintOffset ) 288 { 289 CF2_UInt i; 290 CF2_UInt count = cf2_stack_count( opStack ); 291 FT_Bool hasWidthArg = (FT_Bool)( count & 1 ); 292 293 /* variable accumulates delta values from operand stack */ 294 CF2_Fixed position = hintOffset; 295 296 297 if ( hasWidthArg && !*haveWidth ) 298 *width = cf2_stack_getReal( opStack, 0 ) + 299 cf2_getNominalWidthX( font->decoder ); 300 301 if ( font->decoder->width_only ) 302 goto exit; 303 304 for ( i = hasWidthArg ? 1 : 0; i < count; i += 2 ) 305 { 306 /* construct a CF2_StemHint and push it onto the list */ 307 CF2_StemHintRec stemhint; 308 309 310 stemhint.min = 311 position += cf2_stack_getReal( opStack, i ); 312 stemhint.max = 313 position += cf2_stack_getReal( opStack, i + 1 ); 314 315 stemhint.used = FALSE; 316 stemhint.maxDS = 317 stemhint.minDS = 0; 318 319 cf2_arrstack_push( stemHintArray, &stemhint ); /* defer error check */ 320 } 321 322 cf2_stack_clear( opStack ); 323 324 exit: 325 /* cf2_doStems must define a width (may be default) */ 326 *haveWidth = TRUE; 327 } 328 329 330 static void cf2_doFlex(CF2_Stack opStack,CF2_Fixed * curX,CF2_Fixed * curY,CF2_GlyphPath glyphPath,const FT_Bool * readFromStack,FT_Bool doConditionalLastRead)331 cf2_doFlex( CF2_Stack opStack, 332 CF2_Fixed* curX, 333 CF2_Fixed* curY, 334 CF2_GlyphPath glyphPath, 335 const FT_Bool* readFromStack, 336 FT_Bool doConditionalLastRead ) 337 { 338 CF2_Fixed vals[14]; 339 CF2_UInt index; 340 FT_Bool isHFlex; 341 CF2_Int top, i, j; 342 343 344 vals[0] = *curX; 345 vals[1] = *curY; 346 index = 0; 347 isHFlex = readFromStack[9] == FALSE; 348 top = isHFlex ? 9 : 10; 349 350 for ( i = 0; i < top; i++ ) 351 { 352 vals[i + 2] = vals[i]; 353 if ( readFromStack[i] ) 354 vals[i + 2] += cf2_stack_getReal( opStack, index++ ); 355 } 356 357 if ( isHFlex ) 358 vals[9 + 2] = *curY; 359 360 if ( doConditionalLastRead ) 361 { 362 FT_Bool lastIsX = (FT_Bool)( cf2_fixedAbs( vals[10] - *curX ) > 363 cf2_fixedAbs( vals[11] - *curY ) ); 364 CF2_Fixed lastVal = cf2_stack_getReal( opStack, index ); 365 366 367 if ( lastIsX ) 368 { 369 vals[12] = vals[10] + lastVal; 370 vals[13] = *curY; 371 } 372 else 373 { 374 vals[12] = *curX; 375 vals[13] = vals[11] + lastVal; 376 } 377 } 378 else 379 { 380 if ( readFromStack[10] ) 381 vals[12] = vals[10] + cf2_stack_getReal( opStack, index++ ); 382 else 383 vals[12] = *curX; 384 385 if ( readFromStack[11] ) 386 vals[13] = vals[11] + cf2_stack_getReal( opStack, index ); 387 else 388 vals[13] = *curY; 389 } 390 391 for ( j = 0; j < 2; j++ ) 392 cf2_glyphpath_curveTo( glyphPath, vals[j * 6 + 2], 393 vals[j * 6 + 3], 394 vals[j * 6 + 4], 395 vals[j * 6 + 5], 396 vals[j * 6 + 6], 397 vals[j * 6 + 7] ); 398 399 cf2_stack_clear( opStack ); 400 401 *curX = vals[12]; 402 *curY = vals[13]; 403 } 404 405 406 /* 407 * `error' is a shared error code used by many objects in this 408 * routine. Before the code continues from an error, it must check and 409 * record the error in `*error'. The idea is that this shared 410 * error code will record the first error encountered. If testing 411 * for an error anyway, the cost of `goto exit' is small, so we do it, 412 * even if continuing would be safe. In this case, `lastError' is 413 * set, so the testing and storing can be done in one place, at `exit'. 414 * 415 * Continuing after an error is intended for objects which do their own 416 * testing of `*error', e.g., array stack functions. This allows us to 417 * avoid an extra test after the call. 418 * 419 * Unimplemented opcodes are ignored. 420 * 421 */ 422 FT_LOCAL_DEF( void ) cf2_interpT2CharString(CF2_Font font,CF2_Buffer buf,CF2_OutlineCallbacks callbacks,const FT_Vector * translation,FT_Bool doingSeac,CF2_Fixed curX,CF2_Fixed curY,CF2_Fixed * width)423 cf2_interpT2CharString( CF2_Font font, 424 CF2_Buffer buf, 425 CF2_OutlineCallbacks callbacks, 426 const FT_Vector* translation, 427 FT_Bool doingSeac, 428 CF2_Fixed curX, 429 CF2_Fixed curY, 430 CF2_Fixed* width ) 431 { 432 /* lastError is used for errors that are immediately tested */ 433 FT_Error lastError = FT_Err_Ok; 434 435 /* pointer to parsed font object */ 436 CFF_Decoder* decoder = font->decoder; 437 438 FT_Error* error = &font->error; 439 FT_Memory memory = font->memory; 440 441 CF2_Fixed scaleY = font->innerTransform.d; 442 CF2_Fixed nominalWidthX = cf2_getNominalWidthX( decoder ); 443 444 /* save this for hinting seac accents */ 445 CF2_Fixed hintOriginY = curY; 446 447 CF2_Stack opStack = NULL; 448 FT_Byte op1; /* first opcode byte */ 449 450 CF2_F16Dot16 storage[CF2_STORAGE_SIZE]; /* for `put' and `get' */ 451 452 /* instruction limit; 20,000,000 matches Avalon */ 453 FT_UInt32 instructionLimit = 20000000UL; 454 455 CF2_ArrStackRec subrStack; 456 457 FT_Bool haveWidth; 458 CF2_Buffer charstring = NULL; 459 460 CF2_Int charstringIndex = -1; /* initialize to empty */ 461 462 /* TODO: placeholders for hint structures */ 463 464 /* objects used for hinting */ 465 CF2_ArrStackRec hStemHintArray; 466 CF2_ArrStackRec vStemHintArray; 467 468 CF2_HintMaskRec hintMask; 469 CF2_GlyphPathRec glyphPath; 470 471 472 /* initialize the remaining objects */ 473 cf2_arrstack_init( &subrStack, 474 memory, 475 error, 476 sizeof ( CF2_BufferRec ) ); 477 cf2_arrstack_init( &hStemHintArray, 478 memory, 479 error, 480 sizeof ( CF2_StemHintRec ) ); 481 cf2_arrstack_init( &vStemHintArray, 482 memory, 483 error, 484 sizeof ( CF2_StemHintRec ) ); 485 486 /* initialize CF2_StemHint arrays */ 487 cf2_hintmask_init( &hintMask, error ); 488 489 /* initialize path map to manage drawing operations */ 490 491 /* Note: last 4 params are used to handle `MoveToPermissive', which */ 492 /* may need to call `hintMap.Build' */ 493 /* TODO: MoveToPermissive is gone; are these still needed? */ 494 cf2_glyphpath_init( &glyphPath, 495 font, 496 callbacks, 497 scaleY, 498 /* hShift, */ 499 &hStemHintArray, 500 &vStemHintArray, 501 &hintMask, 502 hintOriginY, 503 &font->blues, 504 translation ); 505 506 /* 507 * Initialize state for width parsing. From the CFF Spec: 508 * 509 * The first stack-clearing operator, which must be one of hstem, 510 * hstemhm, vstem, vstemhm, cntrmask, hintmask, hmoveto, vmoveto, 511 * rmoveto, or endchar, takes an additional argument - the width (as 512 * described earlier), which may be expressed as zero or one numeric 513 * argument. 514 * 515 * What we implement here uses the first validly specified width, but 516 * does not detect errors for specifying more than one width. 517 * 518 * If one of the above operators occurs without explicitly specifying 519 * a width, we assume the default width. 520 * 521 */ 522 haveWidth = FALSE; 523 *width = cf2_getDefaultWidthX( decoder ); 524 525 /* 526 * Note: at this point, all pointers to resources must be NULL 527 * and all local objects must be initialized. 528 * There must be no branches to exit: above this point. 529 * 530 */ 531 532 /* allocate an operand stack */ 533 opStack = cf2_stack_init( memory, error ); 534 if ( !opStack ) 535 { 536 lastError = FT_THROW( Out_Of_Memory ); 537 goto exit; 538 } 539 540 /* initialize subroutine stack by placing top level charstring as */ 541 /* first element (max depth plus one for the charstring) */ 542 /* Note: Caller owns and must finalize the first charstring. */ 543 /* Our copy of it does not change that requirement. */ 544 cf2_arrstack_setCount( &subrStack, CF2_MAX_SUBR + 1 ); 545 546 charstring = (CF2_Buffer)cf2_arrstack_getBuffer( &subrStack ); 547 *charstring = *buf; /* structure copy */ 548 549 charstringIndex = 0; /* entry is valid now */ 550 551 /* catch errors so far */ 552 if ( *error ) 553 goto exit; 554 555 /* main interpreter loop */ 556 while ( 1 ) 557 { 558 if ( cf2_buf_isEnd( charstring ) ) 559 { 560 /* If we've reached the end of the charstring, simulate a */ 561 /* cf2_cmdRETURN or cf2_cmdENDCHAR. */ 562 if ( charstringIndex ) 563 op1 = cf2_cmdRETURN; /* end of buffer for subroutine */ 564 else 565 op1 = cf2_cmdENDCHAR; /* end of buffer for top level charstring */ 566 } 567 else 568 op1 = (FT_Byte)cf2_buf_readByte( charstring ); 569 570 /* check for errors once per loop */ 571 if ( *error ) 572 goto exit; 573 574 instructionLimit--; 575 if ( instructionLimit == 0 ) 576 { 577 lastError = FT_THROW( Invalid_Glyph_Format ); 578 goto exit; 579 } 580 581 switch( op1 ) 582 { 583 case cf2_cmdRESERVED_0: 584 case cf2_cmdRESERVED_2: 585 case cf2_cmdRESERVED_9: 586 case cf2_cmdRESERVED_13: 587 case cf2_cmdRESERVED_15: 588 case cf2_cmdRESERVED_16: 589 case cf2_cmdRESERVED_17: 590 /* we may get here if we have a prior error */ 591 FT_TRACE4(( " unknown op (%d)\n", op1 )); 592 break; 593 594 case cf2_cmdHSTEMHM: 595 case cf2_cmdHSTEM: 596 FT_TRACE4(( op1 == cf2_cmdHSTEMHM ? " hstemhm\n" : " hstem\n" )); 597 598 /* never add hints after the mask is computed */ 599 if ( cf2_hintmask_isValid( &hintMask ) ) 600 { 601 FT_TRACE4(( "cf2_interpT2CharString:" 602 " invalid horizontal hint mask\n" )); 603 break; 604 } 605 606 cf2_doStems( font, 607 opStack, 608 &hStemHintArray, 609 width, 610 &haveWidth, 611 0 ); 612 613 if ( font->decoder->width_only ) 614 goto exit; 615 616 break; 617 618 case cf2_cmdVSTEMHM: 619 case cf2_cmdVSTEM: 620 FT_TRACE4(( op1 == cf2_cmdVSTEMHM ? " vstemhm\n" : " vstem\n" )); 621 622 /* never add hints after the mask is computed */ 623 if ( cf2_hintmask_isValid( &hintMask ) ) 624 { 625 FT_TRACE4(( "cf2_interpT2CharString:" 626 " invalid vertical hint mask\n" )); 627 break; 628 } 629 630 cf2_doStems( font, 631 opStack, 632 &vStemHintArray, 633 width, 634 &haveWidth, 635 0 ); 636 637 if ( font->decoder->width_only ) 638 goto exit; 639 640 break; 641 642 case cf2_cmdVMOVETO: 643 FT_TRACE4(( " vmoveto\n" )); 644 645 if ( cf2_stack_count( opStack ) > 1 && !haveWidth ) 646 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 647 648 /* width is defined or default after this */ 649 haveWidth = TRUE; 650 651 if ( font->decoder->width_only ) 652 goto exit; 653 654 curY += cf2_stack_popFixed( opStack ); 655 656 cf2_glyphpath_moveTo( &glyphPath, curX, curY ); 657 658 break; 659 660 case cf2_cmdRLINETO: 661 { 662 CF2_UInt index; 663 CF2_UInt count = cf2_stack_count( opStack ); 664 665 666 FT_TRACE4(( " rlineto\n" )); 667 668 for ( index = 0; index < count; index += 2 ) 669 { 670 curX += cf2_stack_getReal( opStack, index + 0 ); 671 curY += cf2_stack_getReal( opStack, index + 1 ); 672 673 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 674 } 675 676 cf2_stack_clear( opStack ); 677 } 678 continue; /* no need to clear stack again */ 679 680 case cf2_cmdHLINETO: 681 case cf2_cmdVLINETO: 682 { 683 CF2_UInt index; 684 CF2_UInt count = cf2_stack_count( opStack ); 685 686 FT_Bool isX = op1 == cf2_cmdHLINETO; 687 688 689 FT_TRACE4(( isX ? " hlineto\n" : " vlineto\n" )); 690 691 for ( index = 0; index < count; index++ ) 692 { 693 CF2_Fixed v = cf2_stack_getReal( opStack, index ); 694 695 696 if ( isX ) 697 curX += v; 698 else 699 curY += v; 700 701 isX = !isX; 702 703 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 704 } 705 706 cf2_stack_clear( opStack ); 707 } 708 continue; 709 710 case cf2_cmdRCURVELINE: 711 case cf2_cmdRRCURVETO: 712 { 713 CF2_UInt count = cf2_stack_count( opStack ); 714 CF2_UInt index = 0; 715 716 717 FT_TRACE4(( op1 == cf2_cmdRCURVELINE ? " rcurveline\n" 718 : " rrcurveto\n" )); 719 720 while ( index + 6 <= count ) 721 { 722 CF2_Fixed x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 723 CF2_Fixed y1 = cf2_stack_getReal( opStack, index + 1 ) + curY; 724 CF2_Fixed x2 = cf2_stack_getReal( opStack, index + 2 ) + x1; 725 CF2_Fixed y2 = cf2_stack_getReal( opStack, index + 3 ) + y1; 726 CF2_Fixed x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; 727 CF2_Fixed y3 = cf2_stack_getReal( opStack, index + 5 ) + y2; 728 729 730 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 731 732 curX = x3; 733 curY = y3; 734 index += 6; 735 } 736 737 if ( op1 == cf2_cmdRCURVELINE ) 738 { 739 curX += cf2_stack_getReal( opStack, index + 0 ); 740 curY += cf2_stack_getReal( opStack, index + 1 ); 741 742 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 743 } 744 745 cf2_stack_clear( opStack ); 746 } 747 continue; /* no need to clear stack again */ 748 749 case cf2_cmdCALLGSUBR: 750 case cf2_cmdCALLSUBR: 751 { 752 CF2_Int subrNum; 753 754 755 FT_TRACE4(( op1 == cf2_cmdCALLGSUBR ? " callgsubr" 756 : " callsubr" )); 757 758 if ( charstringIndex > CF2_MAX_SUBR ) 759 { 760 /* max subr plus one for charstring */ 761 lastError = FT_THROW( Invalid_Glyph_Format ); 762 goto exit; /* overflow of stack */ 763 } 764 765 /* push our current CFF charstring region on subrStack */ 766 charstring = (CF2_Buffer) 767 cf2_arrstack_getPointer( 768 &subrStack, 769 (size_t)charstringIndex + 1 ); 770 771 /* set up the new CFF region and pointer */ 772 subrNum = cf2_stack_popInt( opStack ); 773 774 switch ( op1 ) 775 { 776 case cf2_cmdCALLGSUBR: 777 FT_TRACE4(( " (idx %d, entering level %d)\n", 778 subrNum + decoder->globals_bias, 779 charstringIndex + 1 )); 780 781 if ( cf2_initGlobalRegionBuffer( decoder, 782 subrNum, 783 charstring ) ) 784 { 785 lastError = FT_THROW( Invalid_Glyph_Format ); 786 goto exit; /* subroutine lookup or stream error */ 787 } 788 break; 789 790 default: 791 /* cf2_cmdCALLSUBR */ 792 FT_TRACE4(( " (idx %d, entering level %d)\n", 793 subrNum + decoder->locals_bias, 794 charstringIndex + 1 )); 795 796 if ( cf2_initLocalRegionBuffer( decoder, 797 subrNum, 798 charstring ) ) 799 { 800 lastError = FT_THROW( Invalid_Glyph_Format ); 801 goto exit; /* subroutine lookup or stream error */ 802 } 803 } 804 805 charstringIndex += 1; /* entry is valid now */ 806 } 807 continue; /* do not clear the stack */ 808 809 case cf2_cmdRETURN: 810 FT_TRACE4(( " return (leaving level %d)\n", charstringIndex )); 811 812 if ( charstringIndex < 1 ) 813 { 814 /* Note: cannot return from top charstring */ 815 lastError = FT_THROW( Invalid_Glyph_Format ); 816 goto exit; /* underflow of stack */ 817 } 818 819 /* restore position in previous charstring */ 820 charstring = (CF2_Buffer) 821 cf2_arrstack_getPointer( 822 &subrStack, 823 (CF2_UInt)--charstringIndex ); 824 continue; /* do not clear the stack */ 825 826 case cf2_cmdESC: 827 { 828 FT_Byte op2 = (FT_Byte)cf2_buf_readByte( charstring ); 829 830 831 switch ( op2 ) 832 { 833 case cf2_escDOTSECTION: 834 /* something about `flip type of locking' -- ignore it */ 835 FT_TRACE4(( " dotsection\n" )); 836 837 break; 838 839 case cf2_escAND: 840 { 841 CF2_F16Dot16 arg1; 842 CF2_F16Dot16 arg2; 843 844 845 FT_TRACE4(( " and\n" )); 846 847 arg2 = cf2_stack_popFixed( opStack ); 848 arg1 = cf2_stack_popFixed( opStack ); 849 850 cf2_stack_pushInt( opStack, arg1 && arg2 ); 851 } 852 continue; /* do not clear the stack */ 853 854 case cf2_escOR: 855 { 856 CF2_F16Dot16 arg1; 857 CF2_F16Dot16 arg2; 858 859 860 FT_TRACE4(( " or\n" )); 861 862 arg2 = cf2_stack_popFixed( opStack ); 863 arg1 = cf2_stack_popFixed( opStack ); 864 865 cf2_stack_pushInt( opStack, arg1 || arg2 ); 866 } 867 continue; /* do not clear the stack */ 868 869 case cf2_escNOT: 870 { 871 CF2_F16Dot16 arg; 872 873 874 FT_TRACE4(( " not\n" )); 875 876 arg = cf2_stack_popFixed( opStack ); 877 878 cf2_stack_pushInt( opStack, !arg ); 879 } 880 continue; /* do not clear the stack */ 881 882 case cf2_escABS: 883 { 884 CF2_F16Dot16 arg; 885 886 887 FT_TRACE4(( " abs\n" )); 888 889 arg = cf2_stack_popFixed( opStack ); 890 891 cf2_stack_pushFixed( opStack, FT_ABS( arg ) ); 892 } 893 continue; /* do not clear the stack */ 894 895 case cf2_escADD: 896 { 897 CF2_F16Dot16 summand1; 898 CF2_F16Dot16 summand2; 899 900 901 FT_TRACE4(( " add\n" )); 902 903 summand2 = cf2_stack_popFixed( opStack ); 904 summand1 = cf2_stack_popFixed( opStack ); 905 906 cf2_stack_pushFixed( opStack, summand1 + summand2 ); 907 } 908 continue; /* do not clear the stack */ 909 910 case cf2_escSUB: 911 { 912 CF2_F16Dot16 minuend; 913 CF2_F16Dot16 subtrahend; 914 915 916 FT_TRACE4(( " sub\n" )); 917 918 subtrahend = cf2_stack_popFixed( opStack ); 919 minuend = cf2_stack_popFixed( opStack ); 920 921 cf2_stack_pushFixed( opStack, minuend - subtrahend ); 922 } 923 continue; /* do not clear the stack */ 924 925 case cf2_escDIV: 926 { 927 CF2_F16Dot16 dividend; 928 CF2_F16Dot16 divisor; 929 930 931 FT_TRACE4(( " div\n" )); 932 933 divisor = cf2_stack_popFixed( opStack ); 934 dividend = cf2_stack_popFixed( opStack ); 935 936 cf2_stack_pushFixed( opStack, FT_DivFix( dividend, divisor ) ); 937 } 938 continue; /* do not clear the stack */ 939 940 case cf2_escNEG: 941 { 942 CF2_F16Dot16 arg; 943 944 945 FT_TRACE4(( " neg\n" )); 946 947 arg = cf2_stack_popFixed( opStack ); 948 949 cf2_stack_pushFixed( opStack, -arg ); 950 } 951 continue; /* do not clear the stack */ 952 953 case cf2_escEQ: 954 { 955 CF2_F16Dot16 arg1; 956 CF2_F16Dot16 arg2; 957 958 959 FT_TRACE4(( " eq\n" )); 960 961 arg2 = cf2_stack_popFixed( opStack ); 962 arg1 = cf2_stack_popFixed( opStack ); 963 964 cf2_stack_pushInt( opStack, arg1 == arg2 ); 965 } 966 continue; /* do not clear the stack */ 967 968 case cf2_escDROP: 969 FT_TRACE4(( " drop\n" )); 970 971 (void)cf2_stack_popFixed( opStack ); 972 continue; /* do not clear the stack */ 973 974 case cf2_escPUT: 975 { 976 CF2_F16Dot16 val; 977 CF2_Int idx; 978 979 980 FT_TRACE4(( " put\n" )); 981 982 idx = cf2_stack_popInt( opStack ); 983 val = cf2_stack_popFixed( opStack ); 984 985 if ( idx >= 0 && idx < CF2_STORAGE_SIZE ) 986 storage[idx] = val; 987 } 988 continue; /* do not clear the stack */ 989 990 case cf2_escGET: 991 { 992 CF2_Int idx; 993 994 995 FT_TRACE4(( " get\n" )); 996 997 idx = cf2_stack_popInt( opStack ); 998 999 if ( idx >= 0 && idx < CF2_STORAGE_SIZE ) 1000 cf2_stack_pushFixed( opStack, storage[idx] ); 1001 } 1002 continue; /* do not clear the stack */ 1003 1004 case cf2_escIFELSE: 1005 { 1006 CF2_F16Dot16 arg1; 1007 CF2_F16Dot16 arg2; 1008 CF2_F16Dot16 cond1; 1009 CF2_F16Dot16 cond2; 1010 1011 1012 FT_TRACE4(( " ifelse\n" )); 1013 1014 cond2 = cf2_stack_popFixed( opStack ); 1015 cond1 = cf2_stack_popFixed( opStack ); 1016 arg2 = cf2_stack_popFixed( opStack ); 1017 arg1 = cf2_stack_popFixed( opStack ); 1018 1019 cf2_stack_pushFixed( opStack, cond1 <= cond2 ? arg1 : arg2 ); 1020 } 1021 continue; /* do not clear the stack */ 1022 1023 case cf2_escRANDOM: /* in spec */ 1024 FT_TRACE4(( " random\n" )); 1025 1026 CF2_FIXME; 1027 break; 1028 1029 case cf2_escMUL: 1030 { 1031 CF2_F16Dot16 factor1; 1032 CF2_F16Dot16 factor2; 1033 1034 1035 FT_TRACE4(( " mul\n" )); 1036 1037 factor2 = cf2_stack_popFixed( opStack ); 1038 factor1 = cf2_stack_popFixed( opStack ); 1039 1040 cf2_stack_pushFixed( opStack, FT_MulFix( factor1, factor2 ) ); 1041 } 1042 continue; /* do not clear the stack */ 1043 1044 case cf2_escSQRT: 1045 { 1046 CF2_F16Dot16 arg; 1047 1048 1049 FT_TRACE4(( " sqrt\n" )); 1050 1051 arg = cf2_stack_popFixed( opStack ); 1052 if ( arg > 0 ) 1053 { 1054 FT_Fixed root = arg; 1055 FT_Fixed new_root; 1056 1057 1058 /* Babylonian method */ 1059 for (;;) 1060 { 1061 new_root = ( root + FT_DivFix( arg, root ) + 1 ) >> 1; 1062 if ( new_root == root ) 1063 break; 1064 root = new_root; 1065 } 1066 arg = new_root; 1067 } 1068 else 1069 arg = 0; 1070 1071 cf2_stack_pushFixed( opStack, arg ); 1072 } 1073 continue; /* do not clear the stack */ 1074 1075 case cf2_escDUP: 1076 { 1077 CF2_F16Dot16 arg; 1078 1079 1080 FT_TRACE4(( " dup\n" )); 1081 1082 arg = cf2_stack_popFixed( opStack ); 1083 1084 cf2_stack_pushFixed( opStack, arg ); 1085 cf2_stack_pushFixed( opStack, arg ); 1086 } 1087 continue; /* do not clear the stack */ 1088 1089 case cf2_escEXCH: 1090 { 1091 CF2_F16Dot16 arg1; 1092 CF2_F16Dot16 arg2; 1093 1094 1095 FT_TRACE4(( " exch\n" )); 1096 1097 arg2 = cf2_stack_popFixed( opStack ); 1098 arg1 = cf2_stack_popFixed( opStack ); 1099 1100 cf2_stack_pushFixed( opStack, arg2 ); 1101 cf2_stack_pushFixed( opStack, arg1 ); 1102 } 1103 continue; /* do not clear the stack */ 1104 1105 case cf2_escINDEX: 1106 { 1107 CF2_Int idx; 1108 CF2_UInt size; 1109 1110 1111 FT_TRACE4(( " index\n" )); 1112 1113 idx = cf2_stack_popInt( opStack ); 1114 size = cf2_stack_count( opStack ); 1115 1116 if ( size > 0 ) 1117 { 1118 /* for `cf2_stack_getReal', index 0 is bottom of stack */ 1119 CF2_UInt gr_idx; 1120 1121 1122 if ( idx < 0 ) 1123 gr_idx = size - 1; 1124 else if ( (CF2_UInt)idx >= size ) 1125 gr_idx = 0; 1126 else 1127 gr_idx = size - 1 - (CF2_UInt)idx; 1128 1129 cf2_stack_pushFixed( opStack, 1130 cf2_stack_getReal( opStack, gr_idx ) ); 1131 } 1132 } 1133 continue; /* do not clear the stack */ 1134 1135 case cf2_escROLL: 1136 { 1137 CF2_Int idx; 1138 CF2_Int count; 1139 1140 1141 FT_TRACE4(( " roll\n" )); 1142 1143 idx = cf2_stack_popInt( opStack ); 1144 count = cf2_stack_popInt( opStack ); 1145 1146 cf2_stack_roll( opStack, count, idx ); 1147 } 1148 continue; /* do not clear the stack */ 1149 1150 case cf2_escHFLEX: 1151 { 1152 static const FT_Bool readFromStack[12] = 1153 { 1154 TRUE /* dx1 */, FALSE /* dy1 */, 1155 TRUE /* dx2 */, TRUE /* dy2 */, 1156 TRUE /* dx3 */, FALSE /* dy3 */, 1157 TRUE /* dx4 */, FALSE /* dy4 */, 1158 TRUE /* dx5 */, FALSE /* dy5 */, 1159 TRUE /* dx6 */, FALSE /* dy6 */ 1160 }; 1161 1162 1163 FT_TRACE4(( " hflex\n" )); 1164 1165 cf2_doFlex( opStack, 1166 &curX, 1167 &curY, 1168 &glyphPath, 1169 readFromStack, 1170 FALSE /* doConditionalLastRead */ ); 1171 } 1172 continue; 1173 1174 case cf2_escFLEX: 1175 { 1176 static const FT_Bool readFromStack[12] = 1177 { 1178 TRUE /* dx1 */, TRUE /* dy1 */, 1179 TRUE /* dx2 */, TRUE /* dy2 */, 1180 TRUE /* dx3 */, TRUE /* dy3 */, 1181 TRUE /* dx4 */, TRUE /* dy4 */, 1182 TRUE /* dx5 */, TRUE /* dy5 */, 1183 TRUE /* dx6 */, TRUE /* dy6 */ 1184 }; 1185 1186 1187 FT_TRACE4(( " flex\n" )); 1188 1189 cf2_doFlex( opStack, 1190 &curX, 1191 &curY, 1192 &glyphPath, 1193 readFromStack, 1194 FALSE /* doConditionalLastRead */ ); 1195 } 1196 break; /* TODO: why is this not a continue? */ 1197 1198 case cf2_escHFLEX1: 1199 { 1200 static const FT_Bool readFromStack[12] = 1201 { 1202 TRUE /* dx1 */, TRUE /* dy1 */, 1203 TRUE /* dx2 */, TRUE /* dy2 */, 1204 TRUE /* dx3 */, FALSE /* dy3 */, 1205 TRUE /* dx4 */, FALSE /* dy4 */, 1206 TRUE /* dx5 */, TRUE /* dy5 */, 1207 TRUE /* dx6 */, FALSE /* dy6 */ 1208 }; 1209 1210 1211 FT_TRACE4(( " hflex1\n" )); 1212 1213 cf2_doFlex( opStack, 1214 &curX, 1215 &curY, 1216 &glyphPath, 1217 readFromStack, 1218 FALSE /* doConditionalLastRead */ ); 1219 } 1220 continue; 1221 1222 case cf2_escFLEX1: 1223 { 1224 static const FT_Bool readFromStack[12] = 1225 { 1226 TRUE /* dx1 */, TRUE /* dy1 */, 1227 TRUE /* dx2 */, TRUE /* dy2 */, 1228 TRUE /* dx3 */, TRUE /* dy3 */, 1229 TRUE /* dx4 */, TRUE /* dy4 */, 1230 TRUE /* dx5 */, TRUE /* dy5 */, 1231 FALSE /* dx6 */, FALSE /* dy6 */ 1232 }; 1233 1234 1235 FT_TRACE4(( " flex1\n" )); 1236 1237 cf2_doFlex( opStack, 1238 &curX, 1239 &curY, 1240 &glyphPath, 1241 readFromStack, 1242 TRUE /* doConditionalLastRead */ ); 1243 } 1244 continue; 1245 1246 case cf2_escRESERVED_1: 1247 case cf2_escRESERVED_2: 1248 case cf2_escRESERVED_6: 1249 case cf2_escRESERVED_7: 1250 case cf2_escRESERVED_8: 1251 case cf2_escRESERVED_13: 1252 case cf2_escRESERVED_16: 1253 case cf2_escRESERVED_17: 1254 case cf2_escRESERVED_19: 1255 case cf2_escRESERVED_25: 1256 case cf2_escRESERVED_31: 1257 case cf2_escRESERVED_32: 1258 case cf2_escRESERVED_33: 1259 default: 1260 FT_TRACE4(( " unknown op (12, %d)\n", op2 )); 1261 1262 }; /* end of switch statement checking `op2' */ 1263 1264 } /* case cf2_cmdESC */ 1265 break; 1266 1267 case cf2_cmdENDCHAR: 1268 FT_TRACE4(( " endchar\n" )); 1269 1270 if ( cf2_stack_count( opStack ) == 1 || 1271 cf2_stack_count( opStack ) == 5 ) 1272 { 1273 if ( !haveWidth ) 1274 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 1275 } 1276 1277 /* width is defined or default after this */ 1278 haveWidth = TRUE; 1279 1280 if ( font->decoder->width_only ) 1281 goto exit; 1282 1283 /* close path if still open */ 1284 cf2_glyphpath_closeOpenPath( &glyphPath ); 1285 1286 if ( cf2_stack_count( opStack ) > 1 ) 1287 { 1288 /* must be either 4 or 5 -- */ 1289 /* this is a (deprecated) implied `seac' operator */ 1290 1291 CF2_Int achar; 1292 CF2_Int bchar; 1293 CF2_BufferRec component; 1294 CF2_Fixed dummyWidth; /* ignore component width */ 1295 FT_Error error2; 1296 1297 1298 if ( doingSeac ) 1299 { 1300 lastError = FT_THROW( Invalid_Glyph_Format ); 1301 goto exit; /* nested seac */ 1302 } 1303 1304 achar = cf2_stack_popInt( opStack ); 1305 bchar = cf2_stack_popInt( opStack ); 1306 1307 curY = cf2_stack_popFixed( opStack ); 1308 curX = cf2_stack_popFixed( opStack ); 1309 1310 error2 = cf2_getSeacComponent( decoder, achar, &component ); 1311 if ( error2 ) 1312 { 1313 lastError = error2; /* pass FreeType error through */ 1314 goto exit; 1315 } 1316 cf2_interpT2CharString( font, 1317 &component, 1318 callbacks, 1319 translation, 1320 TRUE, 1321 curX, 1322 curY, 1323 &dummyWidth ); 1324 cf2_freeSeacComponent( decoder, &component ); 1325 1326 error2 = cf2_getSeacComponent( decoder, bchar, &component ); 1327 if ( error2 ) 1328 { 1329 lastError = error2; /* pass FreeType error through */ 1330 goto exit; 1331 } 1332 cf2_interpT2CharString( font, 1333 &component, 1334 callbacks, 1335 translation, 1336 TRUE, 1337 0, 1338 0, 1339 &dummyWidth ); 1340 cf2_freeSeacComponent( decoder, &component ); 1341 } 1342 goto exit; 1343 1344 case cf2_cmdCNTRMASK: 1345 case cf2_cmdHINTMASK: 1346 /* the final \n in the tracing message gets added in */ 1347 /* `cf2_hintmask_read' (which also traces the mask bytes) */ 1348 FT_TRACE4(( op1 == cf2_cmdCNTRMASK ? " cntrmask" : " hintmask" )); 1349 1350 /* never add hints after the mask is computed */ 1351 if ( cf2_stack_count( opStack ) > 1 && 1352 cf2_hintmask_isValid( &hintMask ) ) 1353 { 1354 FT_TRACE4(( "cf2_interpT2CharString: invalid hint mask\n" )); 1355 break; 1356 } 1357 1358 /* if there are arguments on the stack, there this is an */ 1359 /* implied cf2_cmdVSTEMHM */ 1360 cf2_doStems( font, 1361 opStack, 1362 &vStemHintArray, 1363 width, 1364 &haveWidth, 1365 0 ); 1366 1367 if ( font->decoder->width_only ) 1368 goto exit; 1369 1370 if ( op1 == cf2_cmdHINTMASK ) 1371 { 1372 /* consume the hint mask bytes which follow the operator */ 1373 cf2_hintmask_read( &hintMask, 1374 charstring, 1375 cf2_arrstack_size( &hStemHintArray ) + 1376 cf2_arrstack_size( &vStemHintArray ) ); 1377 } 1378 else 1379 { 1380 /* 1381 * Consume the counter mask bytes which follow the operator: 1382 * Build a temporary hint map, just to place and lock those 1383 * stems participating in the counter mask. These are most 1384 * likely the dominant hstems, and are grouped together in a 1385 * few counter groups, not necessarily in correspondence 1386 * with the hint groups. This reduces the chances of 1387 * conflicts between hstems that are initially placed in 1388 * separate hint groups and then brought together. The 1389 * positions are copied back to `hStemHintArray', so we can 1390 * discard `counterMask' and `counterHintMap'. 1391 * 1392 */ 1393 CF2_HintMapRec counterHintMap; 1394 CF2_HintMaskRec counterMask; 1395 1396 1397 cf2_hintmap_init( &counterHintMap, 1398 font, 1399 &glyphPath.initialHintMap, 1400 &glyphPath.hintMoves, 1401 scaleY ); 1402 cf2_hintmask_init( &counterMask, error ); 1403 1404 cf2_hintmask_read( &counterMask, 1405 charstring, 1406 cf2_arrstack_size( &hStemHintArray ) + 1407 cf2_arrstack_size( &vStemHintArray ) ); 1408 cf2_hintmap_build( &counterHintMap, 1409 &hStemHintArray, 1410 &vStemHintArray, 1411 &counterMask, 1412 0, 1413 FALSE ); 1414 } 1415 break; 1416 1417 case cf2_cmdRMOVETO: 1418 FT_TRACE4(( " rmoveto\n" )); 1419 1420 if ( cf2_stack_count( opStack ) > 2 && !haveWidth ) 1421 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 1422 1423 /* width is defined or default after this */ 1424 haveWidth = TRUE; 1425 1426 if ( font->decoder->width_only ) 1427 goto exit; 1428 1429 curY += cf2_stack_popFixed( opStack ); 1430 curX += cf2_stack_popFixed( opStack ); 1431 1432 cf2_glyphpath_moveTo( &glyphPath, curX, curY ); 1433 1434 break; 1435 1436 case cf2_cmdHMOVETO: 1437 FT_TRACE4(( " hmoveto\n" )); 1438 1439 if ( cf2_stack_count( opStack ) > 1 && !haveWidth ) 1440 *width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX; 1441 1442 /* width is defined or default after this */ 1443 haveWidth = TRUE; 1444 1445 if ( font->decoder->width_only ) 1446 goto exit; 1447 1448 curX += cf2_stack_popFixed( opStack ); 1449 1450 cf2_glyphpath_moveTo( &glyphPath, curX, curY ); 1451 1452 break; 1453 1454 case cf2_cmdRLINECURVE: 1455 { 1456 CF2_UInt count = cf2_stack_count( opStack ); 1457 CF2_UInt index = 0; 1458 1459 1460 FT_TRACE4(( " rlinecurve\n" )); 1461 1462 while ( index + 6 < count ) 1463 { 1464 curX += cf2_stack_getReal( opStack, index + 0 ); 1465 curY += cf2_stack_getReal( opStack, index + 1 ); 1466 1467 cf2_glyphpath_lineTo( &glyphPath, curX, curY ); 1468 index += 2; 1469 } 1470 1471 while ( index < count ) 1472 { 1473 CF2_Fixed x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 1474 CF2_Fixed y1 = cf2_stack_getReal( opStack, index + 1 ) + curY; 1475 CF2_Fixed x2 = cf2_stack_getReal( opStack, index + 2 ) + x1; 1476 CF2_Fixed y2 = cf2_stack_getReal( opStack, index + 3 ) + y1; 1477 CF2_Fixed x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; 1478 CF2_Fixed y3 = cf2_stack_getReal( opStack, index + 5 ) + y2; 1479 1480 1481 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1482 1483 curX = x3; 1484 curY = y3; 1485 index += 6; 1486 } 1487 1488 cf2_stack_clear( opStack ); 1489 } 1490 continue; /* no need to clear stack again */ 1491 1492 case cf2_cmdVVCURVETO: 1493 { 1494 CF2_UInt count, count1 = cf2_stack_count( opStack ); 1495 CF2_UInt index = 0; 1496 1497 1498 /* if `cf2_stack_count' isn't of the form 4n or 4n+1, */ 1499 /* we enforce it by clearing the second bit */ 1500 /* (and sorting the stack indexing to suit) */ 1501 count = count1 & ~2U; 1502 index += count1 - count; 1503 1504 FT_TRACE4(( " vvcurveto\n" )); 1505 1506 while ( index < count ) 1507 { 1508 CF2_Fixed x1, y1, x2, y2, x3, y3; 1509 1510 1511 if ( ( count - index ) & 1 ) 1512 { 1513 x1 = cf2_stack_getReal( opStack, index ) + curX; 1514 1515 ++index; 1516 } 1517 else 1518 x1 = curX; 1519 1520 y1 = cf2_stack_getReal( opStack, index + 0 ) + curY; 1521 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1522 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1523 x3 = x2; 1524 y3 = cf2_stack_getReal( opStack, index + 3 ) + y2; 1525 1526 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1527 1528 curX = x3; 1529 curY = y3; 1530 index += 4; 1531 } 1532 1533 cf2_stack_clear( opStack ); 1534 } 1535 continue; /* no need to clear stack again */ 1536 1537 case cf2_cmdHHCURVETO: 1538 { 1539 CF2_UInt count, count1 = cf2_stack_count( opStack ); 1540 CF2_UInt index = 0; 1541 1542 1543 /* if `cf2_stack_count' isn't of the form 4n or 4n+1, */ 1544 /* we enforce it by clearing the second bit */ 1545 /* (and sorting the stack indexing to suit) */ 1546 count = count1 & ~2U; 1547 index += count1 - count; 1548 1549 FT_TRACE4(( " hhcurveto\n" )); 1550 1551 while ( index < count ) 1552 { 1553 CF2_Fixed x1, y1, x2, y2, x3, y3; 1554 1555 1556 if ( ( count - index ) & 1 ) 1557 { 1558 y1 = cf2_stack_getReal( opStack, index ) + curY; 1559 1560 ++index; 1561 } 1562 else 1563 y1 = curY; 1564 1565 x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 1566 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1567 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1568 x3 = cf2_stack_getReal( opStack, index + 3 ) + x2; 1569 y3 = y2; 1570 1571 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1572 1573 curX = x3; 1574 curY = y3; 1575 index += 4; 1576 } 1577 1578 cf2_stack_clear( opStack ); 1579 } 1580 continue; /* no need to clear stack again */ 1581 1582 case cf2_cmdVHCURVETO: 1583 case cf2_cmdHVCURVETO: 1584 { 1585 CF2_UInt count, count1 = cf2_stack_count( opStack ); 1586 CF2_UInt index = 0; 1587 1588 FT_Bool alternate = op1 == cf2_cmdHVCURVETO; 1589 1590 1591 /* if `cf2_stack_count' isn't of the form 8n, 8n+1, */ 1592 /* 8n+4, or 8n+5, we enforce it by clearing the */ 1593 /* second bit */ 1594 /* (and sorting the stack indexing to suit) */ 1595 count = count1 & ~2U; 1596 index += count1 - count; 1597 1598 FT_TRACE4(( alternate ? " hvcurveto\n" : " vhcurveto\n" )); 1599 1600 while ( index < count ) 1601 { 1602 CF2_Fixed x1, x2, x3, y1, y2, y3; 1603 1604 1605 if ( alternate ) 1606 { 1607 x1 = cf2_stack_getReal( opStack, index + 0 ) + curX; 1608 y1 = curY; 1609 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1610 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1611 y3 = cf2_stack_getReal( opStack, index + 3 ) + y2; 1612 1613 if ( count - index == 5 ) 1614 { 1615 x3 = cf2_stack_getReal( opStack, index + 4 ) + x2; 1616 1617 ++index; 1618 } 1619 else 1620 x3 = x2; 1621 1622 alternate = FALSE; 1623 } 1624 else 1625 { 1626 x1 = curX; 1627 y1 = cf2_stack_getReal( opStack, index + 0 ) + curY; 1628 x2 = cf2_stack_getReal( opStack, index + 1 ) + x1; 1629 y2 = cf2_stack_getReal( opStack, index + 2 ) + y1; 1630 x3 = cf2_stack_getReal( opStack, index + 3 ) + x2; 1631 1632 if ( count - index == 5 ) 1633 { 1634 y3 = cf2_stack_getReal( opStack, index + 4 ) + y2; 1635 1636 ++index; 1637 } 1638 else 1639 y3 = y2; 1640 1641 alternate = TRUE; 1642 } 1643 1644 cf2_glyphpath_curveTo( &glyphPath, x1, y1, x2, y2, x3, y3 ); 1645 1646 curX = x3; 1647 curY = y3; 1648 index += 4; 1649 } 1650 1651 cf2_stack_clear( opStack ); 1652 } 1653 continue; /* no need to clear stack again */ 1654 1655 case cf2_cmdEXTENDEDNMBR: 1656 { 1657 CF2_Int v; 1658 1659 CF2_Int byte1 = cf2_buf_readByte( charstring ); 1660 CF2_Int byte2 = cf2_buf_readByte( charstring ); 1661 1662 1663 v = (FT_Short)( ( byte1 << 8 ) | 1664 byte2 ); 1665 1666 FT_TRACE4(( " %d", v )); 1667 1668 cf2_stack_pushInt( opStack, v ); 1669 } 1670 continue; 1671 1672 default: 1673 /* numbers */ 1674 { 1675 if ( /* op1 >= 32 && */ op1 <= 246 ) 1676 { 1677 CF2_Int v; 1678 1679 1680 v = op1 - 139; 1681 1682 FT_TRACE4(( " %d", v )); 1683 1684 /* -107 .. 107 */ 1685 cf2_stack_pushInt( opStack, v ); 1686 } 1687 1688 else if ( /* op1 >= 247 && */ op1 <= 250 ) 1689 { 1690 CF2_Int v; 1691 1692 1693 v = op1; 1694 v -= 247; 1695 v *= 256; 1696 v += cf2_buf_readByte( charstring ); 1697 v += 108; 1698 1699 FT_TRACE4(( " %d", v )); 1700 1701 /* 108 .. 1131 */ 1702 cf2_stack_pushInt( opStack, v ); 1703 } 1704 1705 else if ( /* op1 >= 251 && */ op1 <= 254 ) 1706 { 1707 CF2_Int v; 1708 1709 1710 v = op1; 1711 v -= 251; 1712 v *= 256; 1713 v += cf2_buf_readByte( charstring ); 1714 v = -v - 108; 1715 1716 FT_TRACE4(( " %d", v )); 1717 1718 /* -1131 .. -108 */ 1719 cf2_stack_pushInt( opStack, v ); 1720 } 1721 1722 else /* op1 == 255 */ 1723 { 1724 CF2_Fixed v; 1725 1726 FT_UInt32 byte1 = (FT_UInt32)cf2_buf_readByte( charstring ); 1727 FT_UInt32 byte2 = (FT_UInt32)cf2_buf_readByte( charstring ); 1728 FT_UInt32 byte3 = (FT_UInt32)cf2_buf_readByte( charstring ); 1729 FT_UInt32 byte4 = (FT_UInt32)cf2_buf_readByte( charstring ); 1730 1731 1732 v = (CF2_Fixed)( ( byte1 << 24 ) | 1733 ( byte2 << 16 ) | 1734 ( byte3 << 8 ) | 1735 byte4 ); 1736 1737 FT_TRACE4(( " %.2f", v / 65536.0 )); 1738 1739 cf2_stack_pushFixed( opStack, v ); 1740 } 1741 } 1742 continue; /* don't clear stack */ 1743 1744 } /* end of switch statement checking `op1' */ 1745 1746 cf2_stack_clear( opStack ); 1747 1748 } /* end of main interpreter loop */ 1749 1750 /* we get here if the charstring ends without cf2_cmdENDCHAR */ 1751 FT_TRACE4(( "cf2_interpT2CharString:" 1752 " charstring ends without ENDCHAR\n" )); 1753 1754 exit: 1755 /* check whether last error seen is also the first one */ 1756 cf2_setError( error, lastError ); 1757 1758 /* free resources from objects we've used */ 1759 cf2_glyphpath_finalize( &glyphPath ); 1760 cf2_arrstack_finalize( &vStemHintArray ); 1761 cf2_arrstack_finalize( &hStemHintArray ); 1762 cf2_arrstack_finalize( &subrStack ); 1763 cf2_stack_free( opStack ); 1764 1765 FT_TRACE4(( "\n" )); 1766 1767 return; 1768 } 1769 1770 1771 /* END */ 1772