1 /***************************************************************************/ 2 /* */ 3 /* cidload.c */ 4 /* */ 5 /* CID-keyed Type1 font loader (body). */ 6 /* */ 7 /* Copyright 1996-2006, 2009, 2011-2014 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_CONFIG_CONFIG_H 22 #include FT_MULTIPLE_MASTERS_H 23 #include FT_INTERNAL_TYPE1_TYPES_H 24 25 #include "cidload.h" 26 27 #include "ciderrs.h" 28 29 30 /*************************************************************************/ 31 /* */ 32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 34 /* messages during execution. */ 35 /* */ 36 #undef FT_COMPONENT 37 #define FT_COMPONENT trace_cidload 38 39 40 /* read a single offset */ 41 FT_LOCAL_DEF( FT_Long ) cid_get_offset(FT_Byte ** start,FT_Byte offsize)42 cid_get_offset( FT_Byte* *start, 43 FT_Byte offsize ) 44 { 45 FT_ULong result; 46 FT_Byte* p = *start; 47 48 49 for ( result = 0; offsize > 0; offsize-- ) 50 { 51 result <<= 8; 52 result |= *p++; 53 } 54 55 *start = p; 56 return (FT_Long)result; 57 } 58 59 60 /*************************************************************************/ 61 /*************************************************************************/ 62 /***** *****/ 63 /***** TYPE 1 SYMBOL PARSING *****/ 64 /***** *****/ 65 /*************************************************************************/ 66 /*************************************************************************/ 67 68 69 static FT_Error cid_load_keyword(CID_Face face,CID_Loader * loader,const T1_Field keyword)70 cid_load_keyword( CID_Face face, 71 CID_Loader* loader, 72 const T1_Field keyword ) 73 { 74 FT_Error error; 75 CID_Parser* parser = &loader->parser; 76 FT_Byte* object; 77 void* dummy_object; 78 CID_FaceInfo cid = &face->cid; 79 80 81 /* if the keyword has a dedicated callback, call it */ 82 if ( keyword->type == T1_FIELD_TYPE_CALLBACK ) 83 { 84 keyword->reader( (FT_Face)face, parser ); 85 error = parser->root.error; 86 goto Exit; 87 } 88 89 /* we must now compute the address of our target object */ 90 switch ( keyword->location ) 91 { 92 case T1_FIELD_LOCATION_CID_INFO: 93 object = (FT_Byte*)cid; 94 break; 95 96 case T1_FIELD_LOCATION_FONT_INFO: 97 object = (FT_Byte*)&cid->font_info; 98 break; 99 100 case T1_FIELD_LOCATION_FONT_EXTRA: 101 object = (FT_Byte*)&face->font_extra; 102 break; 103 104 case T1_FIELD_LOCATION_BBOX: 105 object = (FT_Byte*)&cid->font_bbox; 106 break; 107 108 default: 109 { 110 CID_FaceDict dict; 111 112 113 if ( parser->num_dict < 0 || parser->num_dict >= cid->num_dicts ) 114 { 115 FT_ERROR(( "cid_load_keyword: invalid use of `%s'\n", 116 keyword->ident )); 117 error = FT_THROW( Syntax_Error ); 118 goto Exit; 119 } 120 121 dict = cid->font_dicts + parser->num_dict; 122 switch ( keyword->location ) 123 { 124 case T1_FIELD_LOCATION_PRIVATE: 125 object = (FT_Byte*)&dict->private_dict; 126 break; 127 128 default: 129 object = (FT_Byte*)dict; 130 } 131 } 132 } 133 134 dummy_object = object; 135 136 /* now, load the keyword data in the object's field(s) */ 137 if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY || 138 keyword->type == T1_FIELD_TYPE_FIXED_ARRAY ) 139 error = cid_parser_load_field_table( &loader->parser, keyword, 140 &dummy_object ); 141 else 142 error = cid_parser_load_field( &loader->parser, 143 keyword, &dummy_object ); 144 Exit: 145 return error; 146 } 147 148 149 FT_CALLBACK_DEF( FT_Error ) cid_parse_font_matrix(CID_Face face,CID_Parser * parser)150 cid_parse_font_matrix( CID_Face face, 151 CID_Parser* parser ) 152 { 153 CID_FaceDict dict; 154 FT_Face root = (FT_Face)&face->root; 155 FT_Fixed temp[6]; 156 FT_Fixed temp_scale; 157 158 159 if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts ) 160 { 161 FT_Matrix* matrix; 162 FT_Vector* offset; 163 FT_Int result; 164 165 166 dict = face->cid.font_dicts + parser->num_dict; 167 matrix = &dict->font_matrix; 168 offset = &dict->font_offset; 169 170 result = cid_parser_to_fixed_array( parser, 6, temp, 3 ); 171 172 if ( result < 6 ) 173 return FT_THROW( Invalid_File_Format ); 174 175 temp_scale = FT_ABS( temp[3] ); 176 177 if ( temp_scale == 0 ) 178 { 179 FT_ERROR(( "cid_parse_font_matrix: invalid font matrix\n" )); 180 return FT_THROW( Invalid_File_Format ); 181 } 182 183 /* Set Units per EM based on FontMatrix values. We set the value to */ 184 /* 1000 / temp_scale, because temp_scale was already multiplied by */ 185 /* 1000 (in t1_tofixed, from psobjs.c). */ 186 187 root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale ); 188 189 /* we need to scale the values by 1.0/temp[3] */ 190 if ( temp_scale != 0x10000L ) 191 { 192 temp[0] = FT_DivFix( temp[0], temp_scale ); 193 temp[1] = FT_DivFix( temp[1], temp_scale ); 194 temp[2] = FT_DivFix( temp[2], temp_scale ); 195 temp[4] = FT_DivFix( temp[4], temp_scale ); 196 temp[5] = FT_DivFix( temp[5], temp_scale ); 197 temp[3] = temp[3] < 0 ? -0x10000L : 0x10000L; 198 } 199 200 matrix->xx = temp[0]; 201 matrix->yx = temp[1]; 202 matrix->xy = temp[2]; 203 matrix->yy = temp[3]; 204 205 /* note that the font offsets are expressed in integer font units */ 206 offset->x = temp[4] >> 16; 207 offset->y = temp[5] >> 16; 208 } 209 210 return FT_Err_Ok; 211 } 212 213 214 FT_CALLBACK_DEF( FT_Error ) parse_fd_array(CID_Face face,CID_Parser * parser)215 parse_fd_array( CID_Face face, 216 CID_Parser* parser ) 217 { 218 CID_FaceInfo cid = &face->cid; 219 FT_Memory memory = face->root.memory; 220 FT_Error error = FT_Err_Ok; 221 FT_Long num_dicts; 222 223 224 num_dicts = cid_parser_to_int( parser ); 225 226 if ( !cid->font_dicts ) 227 { 228 FT_Int n; 229 230 231 if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) ) 232 goto Exit; 233 234 cid->num_dicts = (FT_UInt)num_dicts; 235 236 /* don't forget to set a few defaults */ 237 for ( n = 0; n < cid->num_dicts; n++ ) 238 { 239 CID_FaceDict dict = cid->font_dicts + n; 240 241 242 /* default value for lenIV */ 243 dict->private_dict.lenIV = 4; 244 } 245 } 246 247 Exit: 248 return error; 249 } 250 251 252 /* by mistake, `expansion_factor' appears both in PS_PrivateRec */ 253 /* and CID_FaceDictRec (both are public header files and can't */ 254 /* changed); we simply copy the value */ 255 256 FT_CALLBACK_DEF( FT_Error ) parse_expansion_factor(CID_Face face,CID_Parser * parser)257 parse_expansion_factor( CID_Face face, 258 CID_Parser* parser ) 259 { 260 CID_FaceDict dict; 261 262 263 if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts ) 264 { 265 dict = face->cid.font_dicts + parser->num_dict; 266 267 dict->expansion_factor = cid_parser_to_fixed( parser, 0 ); 268 dict->private_dict.expansion_factor = dict->expansion_factor; 269 } 270 271 return FT_Err_Ok; 272 } 273 274 275 static 276 const T1_FieldRec cid_field_records[] = 277 { 278 279 #include "cidtoken.h" 280 281 T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 ) 282 T1_FIELD_CALLBACK( "FontMatrix", cid_parse_font_matrix, 0 ) 283 T1_FIELD_CALLBACK( "ExpansionFactor", parse_expansion_factor, 0 ) 284 285 { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 } 286 }; 287 288 289 static FT_Error cid_parse_dict(CID_Face face,CID_Loader * loader,FT_Byte * base,FT_Long size)290 cid_parse_dict( CID_Face face, 291 CID_Loader* loader, 292 FT_Byte* base, 293 FT_Long size ) 294 { 295 CID_Parser* parser = &loader->parser; 296 297 298 parser->root.cursor = base; 299 parser->root.limit = base + size; 300 parser->root.error = FT_Err_Ok; 301 302 { 303 FT_Byte* cur = base; 304 FT_Byte* limit = cur + size; 305 306 307 for (;;) 308 { 309 FT_Byte* newlimit; 310 311 312 parser->root.cursor = cur; 313 cid_parser_skip_spaces( parser ); 314 315 if ( parser->root.cursor >= limit ) 316 newlimit = limit - 1 - 17; 317 else 318 newlimit = parser->root.cursor - 17; 319 320 /* look for `%ADOBeginFontDict' */ 321 for ( ; cur < newlimit; cur++ ) 322 { 323 if ( *cur == '%' && 324 ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 ) 325 { 326 /* if /FDArray was found, then cid->num_dicts is > 0, and */ 327 /* we can start increasing parser->num_dict */ 328 if ( face->cid.num_dicts > 0 ) 329 parser->num_dict++; 330 } 331 } 332 333 cur = parser->root.cursor; 334 /* no error can occur in cid_parser_skip_spaces */ 335 if ( cur >= limit ) 336 break; 337 338 cid_parser_skip_PS_token( parser ); 339 if ( parser->root.cursor >= limit || parser->root.error ) 340 break; 341 342 /* look for immediates */ 343 if ( *cur == '/' && cur + 2 < limit ) 344 { 345 FT_PtrDist len; 346 347 348 cur++; 349 len = parser->root.cursor - cur; 350 351 if ( len > 0 && len < 22 ) 352 { 353 /* now compare the immediate name to the keyword table */ 354 T1_Field keyword = (T1_Field)cid_field_records; 355 356 357 for (;;) 358 { 359 FT_Byte* name; 360 361 362 name = (FT_Byte*)keyword->ident; 363 if ( !name ) 364 break; 365 366 if ( cur[0] == name[0] && 367 len == (FT_PtrDist)ft_strlen( (const char*)name ) ) 368 { 369 FT_PtrDist n; 370 371 372 for ( n = 1; n < len; n++ ) 373 if ( cur[n] != name[n] ) 374 break; 375 376 if ( n >= len ) 377 { 378 /* we found it - run the parsing callback */ 379 parser->root.error = cid_load_keyword( face, 380 loader, 381 keyword ); 382 if ( parser->root.error ) 383 return parser->root.error; 384 break; 385 } 386 } 387 keyword++; 388 } 389 } 390 } 391 392 cur = parser->root.cursor; 393 } 394 } 395 return parser->root.error; 396 } 397 398 399 /* read the subrmap and the subrs of each font dict */ 400 static FT_Error cid_read_subrs(CID_Face face)401 cid_read_subrs( CID_Face face ) 402 { 403 CID_FaceInfo cid = &face->cid; 404 FT_Memory memory = face->root.memory; 405 FT_Stream stream = face->cid_stream; 406 FT_Error error; 407 FT_Int n; 408 CID_Subrs subr; 409 FT_UInt max_offsets = 0; 410 FT_ULong* offsets = 0; 411 PSAux_Service psaux = (PSAux_Service)face->psaux; 412 413 414 if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) ) 415 goto Exit; 416 417 subr = face->subrs; 418 for ( n = 0; n < cid->num_dicts; n++, subr++ ) 419 { 420 CID_FaceDict dict = cid->font_dicts + n; 421 FT_Int lenIV = dict->private_dict.lenIV; 422 FT_UInt count, num_subrs = dict->num_subrs; 423 FT_ULong data_len; 424 FT_Byte* p; 425 426 427 /* Check for possible overflow. */ 428 if ( num_subrs == FT_UINT_MAX ) 429 { 430 error = FT_THROW( Syntax_Error ); 431 goto Fail; 432 } 433 434 /* reallocate offsets array if needed */ 435 if ( num_subrs + 1 > max_offsets ) 436 { 437 FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 ); 438 439 440 if ( new_max <= max_offsets ) 441 { 442 error = FT_THROW( Syntax_Error ); 443 goto Fail; 444 } 445 446 if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) ) 447 goto Fail; 448 449 max_offsets = new_max; 450 } 451 452 /* read the subrmap's offsets */ 453 if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) || 454 FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes ) ) 455 goto Fail; 456 457 p = (FT_Byte*)stream->cursor; 458 for ( count = 0; count <= num_subrs; count++ ) 459 offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes ); 460 461 FT_FRAME_EXIT(); 462 463 /* offsets must be ordered */ 464 for ( count = 1; count <= num_subrs; count++ ) 465 if ( offsets[count - 1] > offsets[count] ) 466 goto Fail; 467 468 /* now, compute the size of subrs charstrings, */ 469 /* allocate, and read them */ 470 data_len = offsets[num_subrs] - offsets[0]; 471 472 if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) || 473 FT_ALLOC( subr->code[0], data_len ) ) 474 goto Fail; 475 476 if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) || 477 FT_STREAM_READ( subr->code[0], data_len ) ) 478 goto Fail; 479 480 /* set up pointers */ 481 for ( count = 1; count <= num_subrs; count++ ) 482 { 483 FT_ULong len; 484 485 486 len = offsets[count] - offsets[count - 1]; 487 subr->code[count] = subr->code[count - 1] + len; 488 } 489 490 /* decrypt subroutines, but only if lenIV >= 0 */ 491 if ( lenIV >= 0 ) 492 { 493 for ( count = 0; count < num_subrs; count++ ) 494 { 495 FT_ULong len; 496 497 498 len = offsets[count + 1] - offsets[count]; 499 psaux->t1_decrypt( subr->code[count], len, 4330 ); 500 } 501 } 502 503 subr->num_subrs = num_subrs; 504 } 505 506 Exit: 507 FT_FREE( offsets ); 508 return error; 509 510 Fail: 511 if ( face->subrs ) 512 { 513 for ( n = 0; n < cid->num_dicts; n++ ) 514 { 515 if ( face->subrs[n].code ) 516 FT_FREE( face->subrs[n].code[0] ); 517 518 FT_FREE( face->subrs[n].code ); 519 } 520 FT_FREE( face->subrs ); 521 } 522 goto Exit; 523 } 524 525 526 static void cid_init_loader(CID_Loader * loader,CID_Face face)527 cid_init_loader( CID_Loader* loader, 528 CID_Face face ) 529 { 530 FT_UNUSED( face ); 531 532 FT_MEM_ZERO( loader, sizeof ( *loader ) ); 533 } 534 535 536 static void cid_done_loader(CID_Loader * loader)537 cid_done_loader( CID_Loader* loader ) 538 { 539 CID_Parser* parser = &loader->parser; 540 541 542 /* finalize parser */ 543 cid_parser_done( parser ); 544 } 545 546 547 static FT_Error cid_hex_to_binary(FT_Byte * data,FT_Long data_len,FT_ULong offset,CID_Face face)548 cid_hex_to_binary( FT_Byte* data, 549 FT_Long data_len, 550 FT_ULong offset, 551 CID_Face face ) 552 { 553 FT_Stream stream = face->root.stream; 554 FT_Error error; 555 556 FT_Byte buffer[256]; 557 FT_Byte *p, *plimit; 558 FT_Byte *d, *dlimit; 559 FT_Byte val; 560 561 FT_Bool upper_nibble, done; 562 563 564 if ( FT_STREAM_SEEK( offset ) ) 565 goto Exit; 566 567 d = data; 568 dlimit = d + data_len; 569 p = buffer; 570 plimit = p; 571 572 upper_nibble = 1; 573 done = 0; 574 575 while ( d < dlimit ) 576 { 577 if ( p >= plimit ) 578 { 579 FT_ULong oldpos = FT_STREAM_POS(); 580 FT_ULong size = stream->size - oldpos; 581 582 583 if ( size == 0 ) 584 { 585 error = FT_THROW( Syntax_Error ); 586 goto Exit; 587 } 588 589 if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) ) 590 goto Exit; 591 p = buffer; 592 plimit = p + FT_STREAM_POS() - oldpos; 593 } 594 595 if ( ft_isdigit( *p ) ) 596 val = (FT_Byte)( *p - '0' ); 597 else if ( *p >= 'a' && *p <= 'f' ) 598 val = (FT_Byte)( *p - 'a' ); 599 else if ( *p >= 'A' && *p <= 'F' ) 600 val = (FT_Byte)( *p - 'A' + 10 ); 601 else if ( *p == ' ' || 602 *p == '\t' || 603 *p == '\r' || 604 *p == '\n' || 605 *p == '\f' || 606 *p == '\0' ) 607 { 608 p++; 609 continue; 610 } 611 else if ( *p == '>' ) 612 { 613 val = 0; 614 done = 1; 615 } 616 else 617 { 618 error = FT_THROW( Syntax_Error ); 619 goto Exit; 620 } 621 622 if ( upper_nibble ) 623 *d = (FT_Byte)( val << 4 ); 624 else 625 { 626 *d = (FT_Byte)( *d + val ); 627 d++; 628 } 629 630 upper_nibble = (FT_Byte)( 1 - upper_nibble ); 631 632 if ( done ) 633 break; 634 635 p++; 636 } 637 638 error = FT_Err_Ok; 639 640 Exit: 641 return error; 642 } 643 644 645 FT_LOCAL_DEF( FT_Error ) cid_face_open(CID_Face face,FT_Int face_index)646 cid_face_open( CID_Face face, 647 FT_Int face_index ) 648 { 649 CID_Loader loader; 650 CID_Parser* parser; 651 FT_Memory memory = face->root.memory; 652 FT_Error error; 653 654 655 cid_init_loader( &loader, face ); 656 657 parser = &loader.parser; 658 error = cid_parser_new( parser, face->root.stream, face->root.memory, 659 (PSAux_Service)face->psaux ); 660 if ( error ) 661 goto Exit; 662 663 error = cid_parse_dict( face, &loader, 664 parser->postscript, 665 parser->postscript_len ); 666 if ( error ) 667 goto Exit; 668 669 if ( face_index < 0 ) 670 goto Exit; 671 672 if ( FT_NEW( face->cid_stream ) ) 673 goto Exit; 674 675 if ( parser->binary_length ) 676 { 677 /* we must convert the data section from hexadecimal to binary */ 678 if ( FT_ALLOC( face->binary_data, parser->binary_length ) || 679 cid_hex_to_binary( face->binary_data, parser->binary_length, 680 parser->data_offset, face ) ) 681 goto Exit; 682 683 FT_Stream_OpenMemory( face->cid_stream, 684 face->binary_data, parser->binary_length ); 685 face->cid.data_offset = 0; 686 } 687 else 688 { 689 *face->cid_stream = *face->root.stream; 690 face->cid.data_offset = loader.parser.data_offset; 691 } 692 693 error = cid_read_subrs( face ); 694 695 Exit: 696 cid_done_loader( &loader ); 697 return error; 698 } 699 700 701 /* END */ 702