cffload.c revision 295ffce55e0198e7a9f7d46b33f5c2b4147bf821
1/***************************************************************************/ 2/* */ 3/* cffload.c */ 4/* */ 5/* OpenType and CFF data/program tables loader (body). */ 6/* */ 7/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by */ 8/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9/* */ 10/* This file is part of the FreeType project, and may only be used, */ 11/* modified, and distributed under the terms of the FreeType project */ 12/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13/* this file you indicate that you have read the license and */ 14/* understand and accept it fully. */ 15/* */ 16/***************************************************************************/ 17 18 19#include <ft2build.h> 20#include FT_INTERNAL_DEBUG_H 21#include FT_INTERNAL_OBJECTS_H 22#include FT_INTERNAL_STREAM_H 23#include FT_SERVICE_POSTSCRIPT_CMAPS_H 24#include FT_TRUETYPE_TAGS_H 25#include FT_TYPE1_TABLES_H 26 27#include "cffload.h" 28#include "cffparse.h" 29 30#include "cfferrs.h" 31 32 33#if 1 34 35 static const FT_UShort cff_isoadobe_charset[229] = 36 { 37 0, 1, 2, 3, 4, 5, 6, 7, 38 8, 9, 10, 11, 12, 13, 14, 15, 39 16, 17, 18, 19, 20, 21, 22, 23, 40 24, 25, 26, 27, 28, 29, 30, 31, 41 32, 33, 34, 35, 36, 37, 38, 39, 42 40, 41, 42, 43, 44, 45, 46, 47, 43 48, 49, 50, 51, 52, 53, 54, 55, 44 56, 57, 58, 59, 60, 61, 62, 63, 45 64, 65, 66, 67, 68, 69, 70, 71, 46 72, 73, 74, 75, 76, 77, 78, 79, 47 80, 81, 82, 83, 84, 85, 86, 87, 48 88, 89, 90, 91, 92, 93, 94, 95, 49 96, 97, 98, 99, 100, 101, 102, 103, 50 104, 105, 106, 107, 108, 109, 110, 111, 51 112, 113, 114, 115, 116, 117, 118, 119, 52 120, 121, 122, 123, 124, 125, 126, 127, 53 128, 129, 130, 131, 132, 133, 134, 135, 54 136, 137, 138, 139, 140, 141, 142, 143, 55 144, 145, 146, 147, 148, 149, 150, 151, 56 152, 153, 154, 155, 156, 157, 158, 159, 57 160, 161, 162, 163, 164, 165, 166, 167, 58 168, 169, 170, 171, 172, 173, 174, 175, 59 176, 177, 178, 179, 180, 181, 182, 183, 60 184, 185, 186, 187, 188, 189, 190, 191, 61 192, 193, 194, 195, 196, 197, 198, 199, 62 200, 201, 202, 203, 204, 205, 206, 207, 63 208, 209, 210, 211, 212, 213, 214, 215, 64 216, 217, 218, 219, 220, 221, 222, 223, 65 224, 225, 226, 227, 228 66 }; 67 68 static const FT_UShort cff_expert_charset[166] = 69 { 70 0, 1, 229, 230, 231, 232, 233, 234, 71 235, 236, 237, 238, 13, 14, 15, 99, 72 239, 240, 241, 242, 243, 244, 245, 246, 73 247, 248, 27, 28, 249, 250, 251, 252, 74 253, 254, 255, 256, 257, 258, 259, 260, 75 261, 262, 263, 264, 265, 266, 109, 110, 76 267, 268, 269, 270, 271, 272, 273, 274, 77 275, 276, 277, 278, 279, 280, 281, 282, 78 283, 284, 285, 286, 287, 288, 289, 290, 79 291, 292, 293, 294, 295, 296, 297, 298, 80 299, 300, 301, 302, 303, 304, 305, 306, 81 307, 308, 309, 310, 311, 312, 313, 314, 82 315, 316, 317, 318, 158, 155, 163, 319, 83 320, 321, 322, 323, 324, 325, 326, 150, 84 164, 169, 327, 328, 329, 330, 331, 332, 85 333, 334, 335, 336, 337, 338, 339, 340, 86 341, 342, 343, 344, 345, 346, 347, 348, 87 349, 350, 351, 352, 353, 354, 355, 356, 88 357, 358, 359, 360, 361, 362, 363, 364, 89 365, 366, 367, 368, 369, 370, 371, 372, 90 373, 374, 375, 376, 377, 378 91 }; 92 93 static const FT_UShort cff_expertsubset_charset[87] = 94 { 95 0, 1, 231, 232, 235, 236, 237, 238, 96 13, 14, 15, 99, 239, 240, 241, 242, 97 243, 244, 245, 246, 247, 248, 27, 28, 98 249, 250, 251, 253, 254, 255, 256, 257, 99 258, 259, 260, 261, 262, 263, 264, 265, 100 266, 109, 110, 267, 268, 269, 270, 272, 101 300, 301, 302, 305, 314, 315, 158, 155, 102 163, 320, 321, 322, 323, 324, 325, 326, 103 150, 164, 169, 327, 328, 329, 330, 331, 104 332, 333, 334, 335, 336, 337, 338, 339, 105 340, 341, 342, 343, 344, 345, 346 106 }; 107 108 static const FT_UShort cff_standard_encoding[256] = 109 { 110 0, 0, 0, 0, 0, 0, 0, 0, 111 0, 0, 0, 0, 0, 0, 0, 0, 112 0, 0, 0, 0, 0, 0, 0, 0, 113 0, 0, 0, 0, 0, 0, 0, 0, 114 1, 2, 3, 4, 5, 6, 7, 8, 115 9, 10, 11, 12, 13, 14, 15, 16, 116 17, 18, 19, 20, 21, 22, 23, 24, 117 25, 26, 27, 28, 29, 30, 31, 32, 118 33, 34, 35, 36, 37, 38, 39, 40, 119 41, 42, 43, 44, 45, 46, 47, 48, 120 49, 50, 51, 52, 53, 54, 55, 56, 121 57, 58, 59, 60, 61, 62, 63, 64, 122 65, 66, 67, 68, 69, 70, 71, 72, 123 73, 74, 75, 76, 77, 78, 79, 80, 124 81, 82, 83, 84, 85, 86, 87, 88, 125 89, 90, 91, 92, 93, 94, 95, 0, 126 0, 0, 0, 0, 0, 0, 0, 0, 127 0, 0, 0, 0, 0, 0, 0, 0, 128 0, 0, 0, 0, 0, 0, 0, 0, 129 0, 0, 0, 0, 0, 0, 0, 0, 130 0, 96, 97, 98, 99, 100, 101, 102, 131 103, 104, 105, 106, 107, 108, 109, 110, 132 0, 111, 112, 113, 114, 0, 115, 116, 133 117, 118, 119, 120, 121, 122, 0, 123, 134 0, 124, 125, 126, 127, 128, 129, 130, 135 131, 0, 132, 133, 0, 134, 135, 136, 136 137, 0, 0, 0, 0, 0, 0, 0, 137 0, 0, 0, 0, 0, 0, 0, 0, 138 0, 138, 0, 139, 0, 0, 0, 0, 139 140, 141, 142, 143, 0, 0, 0, 0, 140 0, 144, 0, 0, 0, 145, 0, 0, 141 146, 147, 148, 149, 0, 0, 0, 0 142 }; 143 144 static const FT_UShort cff_expert_encoding[256] = 145 { 146 0, 0, 0, 0, 0, 0, 0, 0, 147 0, 0, 0, 0, 0, 0, 0, 0, 148 0, 0, 0, 0, 0, 0, 0, 0, 149 0, 0, 0, 0, 0, 0, 0, 0, 150 1, 229, 230, 0, 231, 232, 233, 234, 151 235, 236, 237, 238, 13, 14, 15, 99, 152 239, 240, 241, 242, 243, 244, 245, 246, 153 247, 248, 27, 28, 249, 250, 251, 252, 154 0, 253, 254, 255, 256, 257, 0, 0, 155 0, 258, 0, 0, 259, 260, 261, 262, 156 0, 0, 263, 264, 265, 0, 266, 109, 157 110, 267, 268, 269, 0, 270, 271, 272, 158 273, 274, 275, 276, 277, 278, 279, 280, 159 281, 282, 283, 284, 285, 286, 287, 288, 160 289, 290, 291, 292, 293, 294, 295, 296, 161 297, 298, 299, 300, 301, 302, 303, 0, 162 0, 0, 0, 0, 0, 0, 0, 0, 163 0, 0, 0, 0, 0, 0, 0, 0, 164 0, 0, 0, 0, 0, 0, 0, 0, 165 0, 0, 0, 0, 0, 0, 0, 0, 166 0, 304, 305, 306, 0, 0, 307, 308, 167 309, 310, 311, 0, 312, 0, 0, 312, 168 0, 0, 314, 315, 0, 0, 316, 317, 169 318, 0, 0, 0, 158, 155, 163, 319, 170 320, 321, 322, 323, 324, 325, 0, 0, 171 326, 150, 164, 169, 327, 328, 329, 330, 172 331, 332, 333, 334, 335, 336, 337, 338, 173 339, 340, 341, 342, 343, 344, 345, 346, 174 347, 348, 349, 350, 351, 352, 353, 354, 175 355, 356, 357, 358, 359, 360, 361, 362, 176 363, 364, 365, 366, 367, 368, 369, 370, 177 371, 372, 373, 374, 375, 376, 377, 378 178 }; 179 180#endif /* 1 */ 181 182 183 FT_LOCAL_DEF( FT_UShort ) 184 cff_get_standard_encoding( FT_UInt charcode ) 185 { 186 return (FT_UShort)( charcode < 256 ? cff_standard_encoding[charcode] 187 : 0 ); 188 } 189 190 191 /*************************************************************************/ 192 /* */ 193 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 194 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 195 /* messages during execution. */ 196 /* */ 197#undef FT_COMPONENT 198#define FT_COMPONENT trace_cffload 199 200 201 /* read an offset from the index's stream current position */ 202 static FT_ULong 203 cff_index_read_offset( CFF_Index idx, 204 FT_Error *errorp ) 205 { 206 FT_Error error; 207 FT_Stream stream = idx->stream; 208 FT_Byte tmp[4]; 209 FT_ULong result = 0; 210 211 212 if ( !FT_STREAM_READ( tmp, idx->off_size ) ) 213 { 214 FT_Int nn; 215 216 217 for ( nn = 0; nn < idx->off_size; nn++ ) 218 result = ( result << 8 ) | tmp[nn]; 219 } 220 221 *errorp = error; 222 return result; 223 } 224 225 226 static FT_Error 227 cff_index_init( CFF_Index idx, 228 FT_Stream stream, 229 FT_Bool load ) 230 { 231 FT_Error error; 232 FT_Memory memory = stream->memory; 233 FT_UShort count; 234 235 236 FT_MEM_ZERO( idx, sizeof ( *idx ) ); 237 238 idx->stream = stream; 239 idx->start = FT_STREAM_POS(); 240 if ( !FT_READ_USHORT( count ) && 241 count > 0 ) 242 { 243 FT_Byte offsize; 244 FT_ULong size; 245 246 247 /* there is at least one element; read the offset size, */ 248 /* then access the offset table to compute the index's total size */ 249 if ( FT_READ_BYTE( offsize ) ) 250 goto Exit; 251 252 if ( offsize < 1 || offsize > 4 ) 253 { 254 error = FT_Err_Invalid_Table; 255 goto Exit; 256 } 257 258 idx->count = count; 259 idx->off_size = offsize; 260 size = (FT_ULong)( count + 1 ) * offsize; 261 262 idx->data_offset = idx->start + 3 + size; 263 264 if ( FT_STREAM_SKIP( size - offsize ) ) 265 goto Exit; 266 267 size = cff_index_read_offset( idx, &error ); 268 if ( error ) 269 goto Exit; 270 271 if ( size == 0 ) 272 { 273 error = CFF_Err_Invalid_Table; 274 goto Exit; 275 } 276 277 idx->data_size = --size; 278 279 if ( load ) 280 { 281 /* load the data */ 282 if ( FT_FRAME_EXTRACT( size, idx->bytes ) ) 283 goto Exit; 284 } 285 else 286 { 287 /* skip the data */ 288 if ( FT_STREAM_SKIP( size ) ) 289 goto Exit; 290 } 291 } 292 293 Exit: 294 if ( error ) 295 FT_FREE( idx->offsets ); 296 297 return error; 298 } 299 300 301 static void 302 cff_index_done( CFF_Index idx ) 303 { 304 if ( idx->stream ) 305 { 306 FT_Stream stream = idx->stream; 307 FT_Memory memory = stream->memory; 308 309 310 if ( idx->bytes ) 311 FT_FRAME_RELEASE( idx->bytes ); 312 313 FT_FREE( idx->offsets ); 314 FT_MEM_ZERO( idx, sizeof ( *idx ) ); 315 } 316 } 317 318 319 static FT_Error 320 cff_index_load_offsets( CFF_Index idx ) 321 { 322 FT_Error error = CFF_Err_Ok; 323 FT_Stream stream = idx->stream; 324 FT_Memory memory = stream->memory; 325 326 327 if ( idx->count > 0 && idx->offsets == NULL ) 328 { 329 FT_Byte offsize = idx->off_size; 330 FT_ULong data_size; 331 FT_Byte* p; 332 FT_Byte* p_end; 333 FT_ULong* poff; 334 335 336 data_size = (FT_ULong)( idx->count + 1 ) * offsize; 337 338 if ( FT_NEW_ARRAY( idx->offsets, idx->count + 1 ) || 339 FT_STREAM_SEEK( idx->start + 3 ) || 340 FT_FRAME_ENTER( data_size ) ) 341 goto Exit; 342 343 poff = idx->offsets; 344 p = (FT_Byte*)stream->cursor; 345 p_end = p + data_size; 346 347 switch ( offsize ) 348 { 349 case 1: 350 for ( ; p < p_end; p++, poff++ ) 351 poff[0] = p[0]; 352 break; 353 354 case 2: 355 for ( ; p < p_end; p += 2, poff++ ) 356 poff[0] = FT_PEEK_USHORT( p ); 357 break; 358 359 case 3: 360 for ( ; p < p_end; p += 3, poff++ ) 361 poff[0] = FT_PEEK_OFF3( p ); 362 break; 363 364 default: 365 for ( ; p < p_end; p += 4, poff++ ) 366 poff[0] = FT_PEEK_ULONG( p ); 367 } 368 369 FT_FRAME_EXIT(); 370 } 371 372 Exit: 373 if ( error ) 374 FT_FREE( idx->offsets ); 375 376 return error; 377 } 378 379 380 /* allocate a table containing pointers to an index's elements */ 381 static FT_Error 382 cff_index_get_pointers( CFF_Index idx, 383 FT_Byte*** table ) 384 { 385 FT_Error error = CFF_Err_Ok; 386 FT_Memory memory = idx->stream->memory; 387 FT_ULong n, offset, old_offset; 388 FT_Byte** t; 389 390 391 *table = 0; 392 393 if ( idx->offsets == NULL ) 394 { 395 error = cff_index_load_offsets( idx ); 396 if ( error ) 397 goto Exit; 398 } 399 400 if ( idx->count > 0 && !FT_NEW_ARRAY( t, idx->count + 1 ) ) 401 { 402 old_offset = 1; 403 for ( n = 0; n <= idx->count; n++ ) 404 { 405 /* at this point, `idx->offsets' can't be NULL */ 406 offset = idx->offsets[n]; 407 if ( !offset ) 408 offset = old_offset; 409 410 /* two sanity checks for invalid offset tables */ 411 else if ( offset < old_offset ) 412 offset = old_offset; 413 414 else if ( offset - 1 >= idx->data_size && n < idx->count ) 415 offset = old_offset; 416 417 t[n] = idx->bytes + offset - 1; 418 419 old_offset = offset; 420 } 421 *table = t; 422 } 423 424 Exit: 425 return error; 426 } 427 428 429 FT_LOCAL_DEF( FT_Error ) 430 cff_index_access_element( CFF_Index idx, 431 FT_UInt element, 432 FT_Byte** pbytes, 433 FT_ULong* pbyte_len ) 434 { 435 FT_Error error = CFF_Err_Ok; 436 437 438 if ( idx && idx->count > element ) 439 { 440 /* compute start and end offsets */ 441 FT_Stream stream = idx->stream; 442 FT_ULong off1, off2 = 0; 443 444 445 /* load offsets from file or the offset table */ 446 if ( !idx->offsets ) 447 { 448 FT_ULong pos = element * idx->off_size; 449 450 451 if ( FT_STREAM_SEEK( idx->start + 3 + pos ) ) 452 goto Exit; 453 454 off1 = cff_index_read_offset( idx, &error ); 455 if ( error ) 456 goto Exit; 457 458 if ( off1 != 0 ) 459 { 460 do 461 { 462 element++; 463 off2 = cff_index_read_offset( idx, &error ); 464 } 465 while ( off2 == 0 && element < idx->count ); 466 } 467 } 468 else /* use offsets table */ 469 { 470 off1 = idx->offsets[element]; 471 if ( off1 ) 472 { 473 do 474 { 475 element++; 476 off2 = idx->offsets[element]; 477 478 } while ( off2 == 0 && element < idx->count ); 479 } 480 } 481 482 /* access element */ 483 if ( off1 && off2 > off1 ) 484 { 485 *pbyte_len = off2 - off1; 486 487 if ( idx->bytes ) 488 { 489 /* this index was completely loaded in memory, that's easy */ 490 *pbytes = idx->bytes + off1 - 1; 491 } 492 else 493 { 494 /* this index is still on disk/file, access it through a frame */ 495 if ( FT_STREAM_SEEK( idx->data_offset + off1 - 1 ) || 496 FT_FRAME_EXTRACT( off2 - off1, *pbytes ) ) 497 goto Exit; 498 } 499 } 500 else 501 { 502 /* empty index element */ 503 *pbytes = 0; 504 *pbyte_len = 0; 505 } 506 } 507 else 508 error = CFF_Err_Invalid_Argument; 509 510 Exit: 511 return error; 512 } 513 514 515 FT_LOCAL_DEF( void ) 516 cff_index_forget_element( CFF_Index idx, 517 FT_Byte** pbytes ) 518 { 519 if ( idx->bytes == 0 ) 520 { 521 FT_Stream stream = idx->stream; 522 523 524 FT_FRAME_RELEASE( *pbytes ); 525 } 526 } 527 528 529 FT_LOCAL_DEF( FT_String* ) 530 cff_index_get_name( CFF_Index idx, 531 FT_UInt element ) 532 { 533 FT_Memory memory = idx->stream->memory; 534 FT_Byte* bytes; 535 FT_ULong byte_len; 536 FT_Error error; 537 FT_String* name = 0; 538 539 540 error = cff_index_access_element( idx, element, &bytes, &byte_len ); 541 if ( error ) 542 goto Exit; 543 544 if ( !FT_ALLOC( name, byte_len + 1 ) ) 545 { 546 FT_MEM_COPY( name, bytes, byte_len ); 547 name[byte_len] = 0; 548 } 549 cff_index_forget_element( idx, &bytes ); 550 551 Exit: 552 return name; 553 } 554 555 556 FT_LOCAL_DEF( FT_String* ) 557 cff_index_get_sid_string( CFF_Index idx, 558 FT_UInt sid, 559 FT_Service_PsCMaps psnames ) 560 { 561 /* value 0xFFFFU indicates a missing dictionary entry */ 562 if ( sid == 0xFFFFU ) 563 return 0; 564 565 /* if it is not a standard string, return it */ 566 if ( sid > 390 ) 567 return cff_index_get_name( idx, sid - 391 ); 568 569 /* CID-keyed CFF fonts don't have glyph names */ 570 if ( !psnames ) 571 return 0; 572 573 /* that's a standard string, fetch a copy from the PSName module */ 574 { 575 FT_String* name = 0; 576 const char* adobe_name = psnames->adobe_std_strings( sid ); 577 578 579 if ( adobe_name ) 580 { 581 FT_Memory memory = idx->stream->memory; 582 FT_Error error; 583 584 585 (void)FT_STRDUP( name, adobe_name ); 586 587 FT_UNUSED( error ); 588 } 589 590 return name; 591 } 592 } 593 594 595 /*************************************************************************/ 596 /*************************************************************************/ 597 /*** ***/ 598 /*** FD Select table support ***/ 599 /*** ***/ 600 /*************************************************************************/ 601 /*************************************************************************/ 602 603 604 static void 605 CFF_Done_FD_Select( CFF_FDSelect fdselect, 606 FT_Stream stream ) 607 { 608 if ( fdselect->data ) 609 FT_FRAME_RELEASE( fdselect->data ); 610 611 fdselect->data_size = 0; 612 fdselect->format = 0; 613 fdselect->range_count = 0; 614 } 615 616 617 static FT_Error 618 CFF_Load_FD_Select( CFF_FDSelect fdselect, 619 FT_UInt num_glyphs, 620 FT_Stream stream, 621 FT_ULong offset ) 622 { 623 FT_Error error; 624 FT_Byte format; 625 FT_UInt num_ranges; 626 627 628 /* read format */ 629 if ( FT_STREAM_SEEK( offset ) || FT_READ_BYTE( format ) ) 630 goto Exit; 631 632 fdselect->format = format; 633 fdselect->cache_count = 0; /* clear cache */ 634 635 switch ( format ) 636 { 637 case 0: /* format 0, that's simple */ 638 fdselect->data_size = num_glyphs; 639 goto Load_Data; 640 641 case 3: /* format 3, a tad more complex */ 642 if ( FT_READ_USHORT( num_ranges ) ) 643 goto Exit; 644 645 fdselect->data_size = num_ranges * 3 + 2; 646 647 Load_Data: 648 if ( FT_FRAME_EXTRACT( fdselect->data_size, fdselect->data ) ) 649 goto Exit; 650 break; 651 652 default: /* hmm... that's wrong */ 653 error = CFF_Err_Invalid_File_Format; 654 } 655 656 Exit: 657 return error; 658 } 659 660 661 FT_LOCAL_DEF( FT_Byte ) 662 cff_fd_select_get( CFF_FDSelect fdselect, 663 FT_UInt glyph_index ) 664 { 665 FT_Byte fd = 0; 666 667 668 switch ( fdselect->format ) 669 { 670 case 0: 671 fd = fdselect->data[glyph_index]; 672 break; 673 674 case 3: 675 /* first, compare to cache */ 676 if ( (FT_UInt)( glyph_index - fdselect->cache_first ) < 677 fdselect->cache_count ) 678 { 679 fd = fdselect->cache_fd; 680 break; 681 } 682 683 /* then, lookup the ranges array */ 684 { 685 FT_Byte* p = fdselect->data; 686 FT_Byte* p_limit = p + fdselect->data_size; 687 FT_Byte fd2; 688 FT_UInt first, limit; 689 690 691 first = FT_NEXT_USHORT( p ); 692 do 693 { 694 if ( glyph_index < first ) 695 break; 696 697 fd2 = *p++; 698 limit = FT_NEXT_USHORT( p ); 699 700 if ( glyph_index < limit ) 701 { 702 fd = fd2; 703 704 /* update cache */ 705 fdselect->cache_first = first; 706 fdselect->cache_count = limit-first; 707 fdselect->cache_fd = fd2; 708 break; 709 } 710 first = limit; 711 712 } while ( p < p_limit ); 713 } 714 break; 715 716 default: 717 ; 718 } 719 720 return fd; 721 } 722 723 724 /*************************************************************************/ 725 /*************************************************************************/ 726 /*** ***/ 727 /*** CFF font support ***/ 728 /*** ***/ 729 /*************************************************************************/ 730 /*************************************************************************/ 731 732 static FT_Error 733 cff_charset_compute_cids( CFF_Charset charset, 734 FT_UInt num_glyphs, 735 FT_Memory memory ) 736 { 737 FT_Error error = FT_Err_Ok; 738 FT_UInt i; 739 FT_Long j; 740 FT_UShort max_cid = 0; 741 742 743 if ( charset->max_cid > 0 ) 744 goto Exit; 745 746 for ( i = 0; i < num_glyphs; i++ ) 747 if ( charset->sids[i] > max_cid ) 748 max_cid = charset->sids[i]; 749 max_cid++; 750 751 if ( FT_NEW_ARRAY( charset->cids, max_cid ) ) 752 goto Exit; 753 754 /* When multiple GIDs map to the same CID, we choose the lowest */ 755 /* GID. This is not described in any spec, but it matches the */ 756 /* behaviour of recent Acroread versions. */ 757 for ( j = num_glyphs - 1; j >= 0 ; j-- ) 758 charset->cids[charset->sids[j]] = (FT_UShort)j; 759 760 charset->max_cid = max_cid; 761 charset->num_glyphs = num_glyphs; 762 763 Exit: 764 return error; 765 } 766 767 768 FT_LOCAL_DEF( FT_UInt ) 769 cff_charset_cid_to_gindex( CFF_Charset charset, 770 FT_UInt cid ) 771 { 772 FT_UInt result = 0; 773 774 775 if ( cid < charset->max_cid ) 776 result = charset->cids[cid]; 777 778 return result; 779 } 780 781 782 static void 783 cff_charset_free_cids( CFF_Charset charset, 784 FT_Memory memory ) 785 { 786 FT_FREE( charset->cids ); 787 charset->max_cid = 0; 788 } 789 790 791 static void 792 cff_charset_done( CFF_Charset charset, 793 FT_Stream stream ) 794 { 795 FT_Memory memory = stream->memory; 796 797 798 cff_charset_free_cids( charset, memory ); 799 800 FT_FREE( charset->sids ); 801 charset->format = 0; 802 charset->offset = 0; 803 } 804 805 806 static FT_Error 807 cff_charset_load( CFF_Charset charset, 808 FT_UInt num_glyphs, 809 FT_Stream stream, 810 FT_ULong base_offset, 811 FT_ULong offset, 812 FT_Bool invert ) 813 { 814 FT_Memory memory = stream->memory; 815 FT_Error error = CFF_Err_Ok; 816 FT_UShort glyph_sid; 817 818 819 /* If the the offset is greater than 2, we have to parse the */ 820 /* charset table. */ 821 if ( offset > 2 ) 822 { 823 FT_UInt j; 824 825 826 charset->offset = base_offset + offset; 827 828 /* Get the format of the table. */ 829 if ( FT_STREAM_SEEK( charset->offset ) || 830 FT_READ_BYTE( charset->format ) ) 831 goto Exit; 832 833 /* Allocate memory for sids. */ 834 if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) 835 goto Exit; 836 837 /* assign the .notdef glyph */ 838 charset->sids[0] = 0; 839 840 switch ( charset->format ) 841 { 842 case 0: 843 if ( num_glyphs > 0 ) 844 { 845 if ( FT_FRAME_ENTER( ( num_glyphs - 1 ) * 2 ) ) 846 goto Exit; 847 848 for ( j = 1; j < num_glyphs; j++ ) 849 { 850 FT_UShort sid = FT_GET_USHORT(); 851 852 853 /* this constant is given in the CFF specification */ 854 if ( sid < 65000L ) 855 charset->sids[j] = sid; 856 else 857 { 858 FT_TRACE0(( "cff_charset_load:" 859 " invalid SID value %d set to zero\n", sid )); 860 charset->sids[j] = 0; 861 } 862 } 863 864 FT_FRAME_EXIT(); 865 } 866 break; 867 868 case 1: 869 case 2: 870 { 871 FT_UInt nleft; 872 FT_UInt i; 873 874 875 j = 1; 876 877 while ( j < num_glyphs ) 878 { 879 /* Read the first glyph sid of the range. */ 880 if ( FT_READ_USHORT( glyph_sid ) ) 881 goto Exit; 882 883 /* Read the number of glyphs in the range. */ 884 if ( charset->format == 2 ) 885 { 886 if ( FT_READ_USHORT( nleft ) ) 887 goto Exit; 888 } 889 else 890 { 891 if ( FT_READ_BYTE( nleft ) ) 892 goto Exit; 893 } 894 895 /* check whether the range contains at least one valid glyph; */ 896 /* the constant is given in the CFF specification */ 897 if ( glyph_sid >= 65000L ) { 898 FT_ERROR(( "cff_charset_load: invalid SID range\n" )); 899 error = CFF_Err_Invalid_File_Format; 900 goto Exit; 901 } 902 903 /* try to rescue some of the SIDs if `nleft' is too large */ 904 if ( nleft > 65000L - 1L || glyph_sid >= 65000L - nleft ) { 905 FT_ERROR(( "cff_charset_load: invalid SID range trimmed\n" )); 906 nleft = ( FT_UInt )( 65000L - 1L - glyph_sid ); 907 } 908 909 /* Fill in the range of sids -- `nleft + 1' glyphs. */ 910 for ( i = 0; j < num_glyphs && i <= nleft; i++, j++, glyph_sid++ ) 911 charset->sids[j] = glyph_sid; 912 } 913 } 914 break; 915 916 default: 917 FT_ERROR(( "cff_charset_load: invalid table format\n" )); 918 error = CFF_Err_Invalid_File_Format; 919 goto Exit; 920 } 921 } 922 else 923 { 924 /* Parse default tables corresponding to offset == 0, 1, or 2. */ 925 /* CFF specification intimates the following: */ 926 /* */ 927 /* In order to use a predefined charset, the following must be */ 928 /* true: The charset constructed for the glyphs in the font's */ 929 /* charstrings dictionary must match the predefined charset in */ 930 /* the first num_glyphs. */ 931 932 charset->offset = offset; /* record charset type */ 933 934 switch ( (FT_UInt)offset ) 935 { 936 case 0: 937 if ( num_glyphs > 229 ) 938 { 939 FT_ERROR(( "cff_charset_load: implicit charset larger than\n" 940 "predefined charset (Adobe ISO-Latin)\n" )); 941 error = CFF_Err_Invalid_File_Format; 942 goto Exit; 943 } 944 945 /* Allocate memory for sids. */ 946 if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) 947 goto Exit; 948 949 /* Copy the predefined charset into the allocated memory. */ 950 FT_ARRAY_COPY( charset->sids, cff_isoadobe_charset, num_glyphs ); 951 952 break; 953 954 case 1: 955 if ( num_glyphs > 166 ) 956 { 957 FT_ERROR(( "cff_charset_load: implicit charset larger than\n" 958 "predefined charset (Adobe Expert)\n" )); 959 error = CFF_Err_Invalid_File_Format; 960 goto Exit; 961 } 962 963 /* Allocate memory for sids. */ 964 if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) 965 goto Exit; 966 967 /* Copy the predefined charset into the allocated memory. */ 968 FT_ARRAY_COPY( charset->sids, cff_expert_charset, num_glyphs ); 969 970 break; 971 972 case 2: 973 if ( num_glyphs > 87 ) 974 { 975 FT_ERROR(( "cff_charset_load: implicit charset larger than\n" 976 "predefined charset (Adobe Expert Subset)\n" )); 977 error = CFF_Err_Invalid_File_Format; 978 goto Exit; 979 } 980 981 /* Allocate memory for sids. */ 982 if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) 983 goto Exit; 984 985 /* Copy the predefined charset into the allocated memory. */ 986 FT_ARRAY_COPY( charset->sids, cff_expertsubset_charset, num_glyphs ); 987 988 break; 989 990 default: 991 error = CFF_Err_Invalid_File_Format; 992 goto Exit; 993 } 994 } 995 996 /* we have to invert the `sids' array for subsetted CID-keyed fonts */ 997 if ( invert ) 998 error = cff_charset_compute_cids( charset, num_glyphs, memory ); 999 1000 Exit: 1001 /* Clean up if there was an error. */ 1002 if ( error ) 1003 { 1004 FT_FREE( charset->sids ); 1005 FT_FREE( charset->cids ); 1006 charset->format = 0; 1007 charset->offset = 0; 1008 charset->sids = 0; 1009 } 1010 1011 return error; 1012 } 1013 1014 1015 static void 1016 cff_encoding_done( CFF_Encoding encoding ) 1017 { 1018 encoding->format = 0; 1019 encoding->offset = 0; 1020 encoding->count = 0; 1021 } 1022 1023 1024 static FT_Error 1025 cff_encoding_load( CFF_Encoding encoding, 1026 CFF_Charset charset, 1027 FT_UInt num_glyphs, 1028 FT_Stream stream, 1029 FT_ULong base_offset, 1030 FT_ULong offset ) 1031 { 1032 FT_Error error = CFF_Err_Ok; 1033 FT_UInt count; 1034 FT_UInt j; 1035 FT_UShort glyph_sid; 1036 FT_UInt glyph_code; 1037 1038 1039 /* Check for charset->sids. If we do not have this, we fail. */ 1040 if ( !charset->sids ) 1041 { 1042 error = CFF_Err_Invalid_File_Format; 1043 goto Exit; 1044 } 1045 1046 /* Zero out the code to gid/sid mappings. */ 1047 for ( j = 0; j < 256; j++ ) 1048 { 1049 encoding->sids [j] = 0; 1050 encoding->codes[j] = 0; 1051 } 1052 1053 /* Note: The encoding table in a CFF font is indexed by glyph index; */ 1054 /* the first encoded glyph index is 1. Hence, we read the character */ 1055 /* code (`glyph_code') at index j and make the assignment: */ 1056 /* */ 1057 /* encoding->codes[glyph_code] = j + 1 */ 1058 /* */ 1059 /* We also make the assignment: */ 1060 /* */ 1061 /* encoding->sids[glyph_code] = charset->sids[j + 1] */ 1062 /* */ 1063 /* This gives us both a code to GID and a code to SID mapping. */ 1064 1065 if ( offset > 1 ) 1066 { 1067 encoding->offset = base_offset + offset; 1068 1069 /* we need to parse the table to determine its size */ 1070 if ( FT_STREAM_SEEK( encoding->offset ) || 1071 FT_READ_BYTE( encoding->format ) || 1072 FT_READ_BYTE( count ) ) 1073 goto Exit; 1074 1075 switch ( encoding->format & 0x7F ) 1076 { 1077 case 0: 1078 { 1079 FT_Byte* p; 1080 1081 1082 /* By convention, GID 0 is always ".notdef" and is never */ 1083 /* coded in the font. Hence, the number of codes found */ 1084 /* in the table is `count+1'. */ 1085 /* */ 1086 encoding->count = count + 1; 1087 1088 if ( FT_FRAME_ENTER( count ) ) 1089 goto Exit; 1090 1091 p = (FT_Byte*)stream->cursor; 1092 1093 for ( j = 1; j <= count; j++ ) 1094 { 1095 glyph_code = *p++; 1096 1097 /* Make sure j is not too big. */ 1098 if ( j < num_glyphs ) 1099 { 1100 /* Assign code to GID mapping. */ 1101 encoding->codes[glyph_code] = (FT_UShort)j; 1102 1103 /* Assign code to SID mapping. */ 1104 encoding->sids[glyph_code] = charset->sids[j]; 1105 } 1106 } 1107 1108 FT_FRAME_EXIT(); 1109 } 1110 break; 1111 1112 case 1: 1113 { 1114 FT_UInt nleft; 1115 FT_UInt i = 1; 1116 FT_UInt k; 1117 1118 1119 encoding->count = 0; 1120 1121 /* Parse the Format1 ranges. */ 1122 for ( j = 0; j < count; j++, i += nleft ) 1123 { 1124 /* Read the first glyph code of the range. */ 1125 if ( FT_READ_BYTE( glyph_code ) ) 1126 goto Exit; 1127 1128 /* Read the number of codes in the range. */ 1129 if ( FT_READ_BYTE( nleft ) ) 1130 goto Exit; 1131 1132 /* Increment nleft, so we read `nleft + 1' codes/sids. */ 1133 nleft++; 1134 1135 /* compute max number of character codes */ 1136 if ( (FT_UInt)nleft > encoding->count ) 1137 encoding->count = nleft; 1138 1139 /* Fill in the range of codes/sids. */ 1140 for ( k = i; k < nleft + i; k++, glyph_code++ ) 1141 { 1142 /* Make sure k is not too big. */ 1143 if ( k < num_glyphs && glyph_code < 256 ) 1144 { 1145 /* Assign code to GID mapping. */ 1146 encoding->codes[glyph_code] = (FT_UShort)k; 1147 1148 /* Assign code to SID mapping. */ 1149 encoding->sids[glyph_code] = charset->sids[k]; 1150 } 1151 } 1152 } 1153 1154 /* simple check; one never knows what can be found in a font */ 1155 if ( encoding->count > 256 ) 1156 encoding->count = 256; 1157 } 1158 break; 1159 1160 default: 1161 FT_ERROR(( "cff_encoding_load: invalid table format\n" )); 1162 error = CFF_Err_Invalid_File_Format; 1163 goto Exit; 1164 } 1165 1166 /* Parse supplemental encodings, if any. */ 1167 if ( encoding->format & 0x80 ) 1168 { 1169 FT_UInt gindex; 1170 1171 1172 /* count supplements */ 1173 if ( FT_READ_BYTE( count ) ) 1174 goto Exit; 1175 1176 for ( j = 0; j < count; j++ ) 1177 { 1178 /* Read supplemental glyph code. */ 1179 if ( FT_READ_BYTE( glyph_code ) ) 1180 goto Exit; 1181 1182 /* Read the SID associated with this glyph code. */ 1183 if ( FT_READ_USHORT( glyph_sid ) ) 1184 goto Exit; 1185 1186 /* Assign code to SID mapping. */ 1187 encoding->sids[glyph_code] = glyph_sid; 1188 1189 /* First, look up GID which has been assigned to */ 1190 /* SID glyph_sid. */ 1191 for ( gindex = 0; gindex < num_glyphs; gindex++ ) 1192 { 1193 if ( charset->sids[gindex] == glyph_sid ) 1194 { 1195 encoding->codes[glyph_code] = (FT_UShort)gindex; 1196 break; 1197 } 1198 } 1199 } 1200 } 1201 } 1202 else 1203 { 1204 /* We take into account the fact a CFF font can use a predefined */ 1205 /* encoding without containing all of the glyphs encoded by this */ 1206 /* encoding (see the note at the end of section 12 in the CFF */ 1207 /* specification). */ 1208 1209 switch ( (FT_UInt)offset ) 1210 { 1211 case 0: 1212 /* First, copy the code to SID mapping. */ 1213 FT_ARRAY_COPY( encoding->sids, cff_standard_encoding, 256 ); 1214 goto Populate; 1215 1216 case 1: 1217 /* First, copy the code to SID mapping. */ 1218 FT_ARRAY_COPY( encoding->sids, cff_expert_encoding, 256 ); 1219 1220 Populate: 1221 /* Construct code to GID mapping from code to SID mapping */ 1222 /* and charset. */ 1223 1224 encoding->count = 0; 1225 1226 error = cff_charset_compute_cids( charset, num_glyphs, 1227 stream->memory ); 1228 if ( error ) 1229 goto Exit; 1230 1231 for ( j = 0; j < 256; j++ ) 1232 { 1233 FT_UInt sid = encoding->sids[j]; 1234 FT_UInt gid = 0; 1235 1236 1237 if ( sid ) 1238 gid = cff_charset_cid_to_gindex( charset, sid ); 1239 1240 if ( gid != 0 ) 1241 { 1242 encoding->codes[j] = (FT_UShort)gid; 1243 1244 if ( encoding->count < j + 1 ) 1245 encoding->count = j + 1; 1246 } 1247 else 1248 { 1249 encoding->codes[j] = 0; 1250 encoding->sids [j] = 0; 1251 } 1252 } 1253 break; 1254 1255 default: 1256 FT_ERROR(( "cff_encoding_load: invalid table format\n" )); 1257 error = CFF_Err_Invalid_File_Format; 1258 goto Exit; 1259 } 1260 } 1261 1262 Exit: 1263 1264 /* Clean up if there was an error. */ 1265 return error; 1266 } 1267 1268 1269 static FT_Error 1270 cff_subfont_load( CFF_SubFont font, 1271 CFF_Index idx, 1272 FT_UInt font_index, 1273 FT_Stream stream, 1274 FT_ULong base_offset, 1275 FT_Library library ) 1276 { 1277 FT_Error error; 1278 CFF_ParserRec parser; 1279 FT_Byte* dict = NULL; 1280 FT_ULong dict_len; 1281 CFF_FontRecDict top = &font->font_dict; 1282 CFF_Private priv = &font->private_dict; 1283 1284 1285 cff_parser_init( &parser, CFF_CODE_TOPDICT, &font->font_dict, library ); 1286 1287 /* set defaults */ 1288 FT_MEM_ZERO( top, sizeof ( *top ) ); 1289 1290 top->underline_position = -100L << 16; 1291 top->underline_thickness = 50L << 16; 1292 top->charstring_type = 2; 1293 top->font_matrix.xx = 0x10000L; 1294 top->font_matrix.yy = 0x10000L; 1295 top->cid_count = 8720; 1296 1297 /* we use the implementation specific SID value 0xFFFF to indicate */ 1298 /* missing entries */ 1299 top->version = 0xFFFFU; 1300 top->notice = 0xFFFFU; 1301 top->copyright = 0xFFFFU; 1302 top->full_name = 0xFFFFU; 1303 top->family_name = 0xFFFFU; 1304 top->weight = 0xFFFFU; 1305 top->embedded_postscript = 0xFFFFU; 1306 1307 top->cid_registry = 0xFFFFU; 1308 top->cid_ordering = 0xFFFFU; 1309 top->cid_font_name = 0xFFFFU; 1310 1311 error = cff_index_access_element( idx, font_index, &dict, &dict_len ); 1312 if ( !error ) 1313 error = cff_parser_run( &parser, dict, dict + dict_len ); 1314 1315 cff_index_forget_element( idx, &dict ); 1316 1317 if ( error ) 1318 goto Exit; 1319 1320 /* if it is a CID font, we stop there */ 1321 if ( top->cid_registry != 0xFFFFU ) 1322 goto Exit; 1323 1324 /* parse the private dictionary, if any */ 1325 if ( top->private_offset && top->private_size ) 1326 { 1327 /* set defaults */ 1328 FT_MEM_ZERO( priv, sizeof ( *priv ) ); 1329 1330 priv->blue_shift = 7; 1331 priv->blue_fuzz = 1; 1332 priv->lenIV = -1; 1333 priv->expansion_factor = (FT_Fixed)( 0.06 * 0x10000L ); 1334 priv->blue_scale = (FT_Fixed)( 0.039625 * 0x10000L * 1000 ); 1335 1336 cff_parser_init( &parser, CFF_CODE_PRIVATE, priv, library ); 1337 1338 if ( FT_STREAM_SEEK( base_offset + font->font_dict.private_offset ) || 1339 FT_FRAME_ENTER( font->font_dict.private_size ) ) 1340 goto Exit; 1341 1342 error = cff_parser_run( &parser, 1343 (FT_Byte*)stream->cursor, 1344 (FT_Byte*)stream->limit ); 1345 FT_FRAME_EXIT(); 1346 if ( error ) 1347 goto Exit; 1348 1349 /* ensure that `num_blue_values' is even */ 1350 priv->num_blue_values &= ~1; 1351 } 1352 1353 /* read the local subrs, if any */ 1354 if ( priv->local_subrs_offset ) 1355 { 1356 if ( FT_STREAM_SEEK( base_offset + top->private_offset + 1357 priv->local_subrs_offset ) ) 1358 goto Exit; 1359 1360 error = cff_index_init( &font->local_subrs_index, stream, 1 ); 1361 if ( error ) 1362 goto Exit; 1363 1364 font->num_local_subrs = font->local_subrs_index.count; 1365 error = cff_index_get_pointers( &font->local_subrs_index, 1366 &font->local_subrs ); 1367 if ( error ) 1368 goto Exit; 1369 } 1370 1371 Exit: 1372 return error; 1373 } 1374 1375 1376 static void 1377 cff_subfont_done( FT_Memory memory, 1378 CFF_SubFont subfont ) 1379 { 1380 if ( subfont ) 1381 { 1382 cff_index_done( &subfont->local_subrs_index ); 1383 FT_FREE( subfont->local_subrs ); 1384 } 1385 } 1386 1387 1388 FT_LOCAL_DEF( FT_Error ) 1389 cff_font_load( FT_Library library, 1390 FT_Stream stream, 1391 FT_Int face_index, 1392 CFF_Font font, 1393 FT_Bool pure_cff ) 1394 { 1395 static const FT_Frame_Field cff_header_fields[] = 1396 { 1397#undef FT_STRUCTURE 1398#define FT_STRUCTURE CFF_FontRec 1399 1400 FT_FRAME_START( 4 ), 1401 FT_FRAME_BYTE( version_major ), 1402 FT_FRAME_BYTE( version_minor ), 1403 FT_FRAME_BYTE( header_size ), 1404 FT_FRAME_BYTE( absolute_offsize ), 1405 FT_FRAME_END 1406 }; 1407 1408 FT_Error error; 1409 FT_Memory memory = stream->memory; 1410 FT_ULong base_offset; 1411 CFF_FontRecDict dict; 1412 1413 1414 FT_ZERO( font ); 1415 1416 font->stream = stream; 1417 font->memory = memory; 1418 dict = &font->top_font.font_dict; 1419 base_offset = FT_STREAM_POS(); 1420 1421 /* read CFF font header */ 1422 if ( FT_STREAM_READ_FIELDS( cff_header_fields, font ) ) 1423 goto Exit; 1424 1425 /* check format */ 1426 if ( font->version_major != 1 || 1427 font->header_size < 4 || 1428 font->absolute_offsize > 4 ) 1429 { 1430 FT_TRACE2(( "[not a CFF font header]\n" )); 1431 error = CFF_Err_Unknown_File_Format; 1432 goto Exit; 1433 } 1434 1435 /* skip the rest of the header */ 1436 if ( FT_STREAM_SKIP( font->header_size - 4 ) ) 1437 goto Exit; 1438 1439 /* read the name, top dict, string and global subrs index */ 1440 if ( FT_SET_ERROR( cff_index_init( &font->name_index, 1441 stream, 0 ) ) || 1442 FT_SET_ERROR( cff_index_init( &font->font_dict_index, 1443 stream, 0 ) ) || 1444 FT_SET_ERROR( cff_index_init( &font->string_index, 1445 stream, 0 ) ) || 1446 FT_SET_ERROR( cff_index_init( &font->global_subrs_index, 1447 stream, 1 ) ) ) 1448 goto Exit; 1449 1450 /* well, we don't really forget the `disabled' fonts... */ 1451 font->num_faces = font->name_index.count; 1452 if ( face_index >= (FT_Int)font->num_faces ) 1453 { 1454 FT_ERROR(( "cff_font_load: incorrect face index = %d\n", 1455 face_index )); 1456 error = CFF_Err_Invalid_Argument; 1457 } 1458 1459 /* in case of a font format check, simply exit now */ 1460 if ( face_index < 0 ) 1461 goto Exit; 1462 1463 /* now, parse the top-level font dictionary */ 1464 error = cff_subfont_load( &font->top_font, 1465 &font->font_dict_index, 1466 face_index, 1467 stream, 1468 base_offset, 1469 library ); 1470 if ( error ) 1471 goto Exit; 1472 1473 if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) ) 1474 goto Exit; 1475 1476 error = cff_index_init( &font->charstrings_index, stream, 0 ); 1477 if ( error ) 1478 goto Exit; 1479 1480 /* now, check for a CID font */ 1481 if ( dict->cid_registry != 0xFFFFU ) 1482 { 1483 CFF_IndexRec fd_index; 1484 CFF_SubFont sub; 1485 FT_UInt idx; 1486 1487 1488 /* this is a CID-keyed font, we must now allocate a table of */ 1489 /* sub-fonts, then load each of them separately */ 1490 if ( FT_STREAM_SEEK( base_offset + dict->cid_fd_array_offset ) ) 1491 goto Exit; 1492 1493 error = cff_index_init( &fd_index, stream, 0 ); 1494 if ( error ) 1495 goto Exit; 1496 1497 if ( fd_index.count > CFF_MAX_CID_FONTS ) 1498 { 1499 FT_TRACE0(( "cff_font_load: FD array too large in CID font\n" )); 1500 goto Fail_CID; 1501 } 1502 1503 /* allocate & read each font dict independently */ 1504 font->num_subfonts = fd_index.count; 1505 if ( FT_NEW_ARRAY( sub, fd_index.count ) ) 1506 goto Fail_CID; 1507 1508 /* set up pointer table */ 1509 for ( idx = 0; idx < fd_index.count; idx++ ) 1510 font->subfonts[idx] = sub + idx; 1511 1512 /* now load each subfont independently */ 1513 for ( idx = 0; idx < fd_index.count; idx++ ) 1514 { 1515 sub = font->subfonts[idx]; 1516 error = cff_subfont_load( sub, &fd_index, idx, 1517 stream, base_offset, library ); 1518 if ( error ) 1519 goto Fail_CID; 1520 } 1521 1522 /* now load the FD Select array */ 1523 error = CFF_Load_FD_Select( &font->fd_select, 1524 font->charstrings_index.count, 1525 stream, 1526 base_offset + dict->cid_fd_select_offset ); 1527 1528 Fail_CID: 1529 cff_index_done( &fd_index ); 1530 1531 if ( error ) 1532 goto Exit; 1533 } 1534 else 1535 font->num_subfonts = 0; 1536 1537 /* read the charstrings index now */ 1538 if ( dict->charstrings_offset == 0 ) 1539 { 1540 FT_ERROR(( "cff_font_load: no charstrings offset\n" )); 1541 error = CFF_Err_Unknown_File_Format; 1542 goto Exit; 1543 } 1544 1545 /* explicit the global subrs */ 1546 font->num_global_subrs = font->global_subrs_index.count; 1547 font->num_glyphs = font->charstrings_index.count; 1548 1549 error = cff_index_get_pointers( &font->global_subrs_index, 1550 &font->global_subrs ) ; 1551 1552 if ( error ) 1553 goto Exit; 1554 1555 /* read the Charset and Encoding tables if available */ 1556 if ( font->num_glyphs > 0 ) 1557 { 1558 FT_Bool invert = FT_BOOL( dict->cid_registry != 0xFFFFU && pure_cff ); 1559 1560 1561 error = cff_charset_load( &font->charset, font->num_glyphs, stream, 1562 base_offset, dict->charset_offset, invert ); 1563 if ( error ) 1564 goto Exit; 1565 1566 /* CID-keyed CFFs don't have an encoding */ 1567 if ( dict->cid_registry == 0xFFFFU ) 1568 { 1569 error = cff_encoding_load( &font->encoding, 1570 &font->charset, 1571 font->num_glyphs, 1572 stream, 1573 base_offset, 1574 dict->encoding_offset ); 1575 if ( error ) 1576 goto Exit; 1577 } 1578 } 1579 1580 /* get the font name (/CIDFontName for CID-keyed fonts, */ 1581 /* /FontName otherwise) */ 1582 font->font_name = cff_index_get_name( &font->name_index, face_index ); 1583 1584 Exit: 1585 return error; 1586 } 1587 1588 1589 FT_LOCAL_DEF( void ) 1590 cff_font_done( CFF_Font font ) 1591 { 1592 FT_Memory memory = font->memory; 1593 FT_UInt idx; 1594 1595 1596 cff_index_done( &font->global_subrs_index ); 1597 cff_index_done( &font->string_index ); 1598 cff_index_done( &font->font_dict_index ); 1599 cff_index_done( &font->name_index ); 1600 cff_index_done( &font->charstrings_index ); 1601 1602 /* release font dictionaries, but only if working with */ 1603 /* a CID keyed CFF font */ 1604 if ( font->num_subfonts > 0 ) 1605 { 1606 for ( idx = 0; idx < font->num_subfonts; idx++ ) 1607 cff_subfont_done( memory, font->subfonts[idx] ); 1608 1609 /* the subfonts array has been allocated as a single block */ 1610 FT_FREE( font->subfonts[0] ); 1611 } 1612 1613 cff_encoding_done( &font->encoding ); 1614 cff_charset_done( &font->charset, font->stream ); 1615 1616 cff_subfont_done( memory, &font->top_font ); 1617 1618 CFF_Done_FD_Select( &font->fd_select, font->stream ); 1619 1620 if (font->font_info != NULL) 1621 { 1622 FT_FREE( font->font_info->version ); 1623 FT_FREE( font->font_info->notice ); 1624 FT_FREE( font->font_info->full_name ); 1625 FT_FREE( font->font_info->family_name ); 1626 FT_FREE( font->font_info->weight ); 1627 FT_FREE( font->font_info ); 1628 } 1629 1630 FT_FREE( font->registry ); 1631 FT_FREE( font->ordering ); 1632 1633 FT_FREE( font->global_subrs ); 1634 FT_FREE( font->font_name ); 1635 } 1636 1637 1638/* END */ 1639