t1load.c (81827B)
1 /**************************************************************************** 2 * 3 * t1load.c 4 * 5 * Type 1 font loader (body). 6 * 7 * Copyright (C) 1996-2025 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 /************************************************************************** 20 * 21 * This is the new and improved Type 1 data loader for FreeType 2. The 22 * old loader has several problems: it is slow, complex, difficult to 23 * maintain, and contains incredible hacks to make it accept some 24 * ill-formed Type 1 fonts without hiccup-ing. Moreover, about 5% of 25 * the Type 1 fonts on my machine still aren't loaded correctly by it. 26 * 27 * This version is much simpler, much faster and also easier to read and 28 * maintain by a great order of magnitude. The idea behind it is to 29 * _not_ try to read the Type 1 token stream with a state machine (i.e. 30 * a Postscript-like interpreter) but rather to perform simple pattern 31 * matching. 32 * 33 * Indeed, nearly all data definitions follow a simple pattern like 34 * 35 * ... /Field <data> ... 36 * 37 * where <data> can be a number, a boolean, a string, or an array of 38 * numbers. There are a few exceptions, namely the encoding, font name, 39 * charstrings, and subrs; they are handled with a special pattern 40 * matching routine. 41 * 42 * All other common cases are handled very simply. The matching rules 43 * are defined in the file `t1tokens.h' through the use of several 44 * macros calls PARSE_XXX. This file is included twice here; the first 45 * time to generate parsing callback functions, the second time to 46 * generate a table of keywords (with pointers to the associated 47 * callback functions). 48 * 49 * The function `parse_dict' simply scans *linearly* a given dictionary 50 * (either the top-level or private one) and calls the appropriate 51 * callback when it encounters an immediate keyword. 52 * 53 * This is by far the fastest way one can find to parse and read all 54 * data. 55 * 56 * This led to tremendous code size reduction. Note that later, the 57 * glyph loader will also be _greatly_ simplified, and the automatic 58 * hinter will replace the clumsy `t1hinter'. 59 * 60 */ 61 62 63 #include <ft2build.h> 64 #include <freetype/internal/ftdebug.h> 65 #include FT_CONFIG_CONFIG_H 66 #include <freetype/ftmm.h> 67 #include <freetype/internal/t1types.h> 68 #include <freetype/internal/ftcalc.h> 69 #include <freetype/internal/fthash.h> 70 71 #include "t1load.h" 72 #include "t1errors.h" 73 74 75 #ifdef FT_CONFIG_OPTION_INCREMENTAL 76 #define IS_INCREMENTAL \ 77 FT_BOOL( FT_FACE( face )->internal->incremental_interface ) 78 #else 79 #define IS_INCREMENTAL 0 80 #endif 81 82 83 /************************************************************************** 84 * 85 * The macro FT_COMPONENT is used in trace mode. It is an implicit 86 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log 87 * messages during execution. 88 */ 89 #undef FT_COMPONENT 90 #define FT_COMPONENT t1load 91 92 93 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 94 95 96 /*************************************************************************/ 97 /*************************************************************************/ 98 /***** *****/ 99 /***** MULTIPLE MASTERS SUPPORT *****/ 100 /***** *****/ 101 /*************************************************************************/ 102 /*************************************************************************/ 103 104 static FT_Error 105 t1_allocate_blend( T1_Face face, 106 FT_UInt num_designs, 107 FT_UInt num_axis ) 108 { 109 PS_Blend blend; 110 FT_Memory memory = face->root.memory; 111 FT_Error error = FT_Err_Ok; 112 113 114 blend = face->blend; 115 if ( !blend ) 116 { 117 if ( FT_NEW( blend ) ) 118 goto Exit; 119 120 blend->num_default_design_vector = 0; 121 blend->weight_vector = NULL; 122 blend->default_weight_vector = NULL; 123 blend->design_pos[0] = NULL; 124 125 face->blend = blend; 126 } 127 128 /* allocate design data if needed */ 129 if ( num_designs > 0 ) 130 { 131 if ( blend->num_designs == 0 ) 132 { 133 FT_UInt nn; 134 135 136 /* allocate the blend `private' and `font_info' dictionaries */ 137 if ( FT_NEW_ARRAY( blend->font_infos[1], num_designs ) || 138 FT_NEW_ARRAY( blend->privates [1], num_designs ) || 139 FT_NEW_ARRAY( blend->bboxes [1], num_designs ) ) 140 goto Exit; 141 142 blend->font_infos[0] = &face->type1.font_info; 143 blend->privates [0] = &face->type1.private_dict; 144 blend->bboxes [0] = &face->type1.font_bbox; 145 146 for ( nn = 2; nn <= num_designs; nn++ ) 147 { 148 blend->font_infos[nn] = blend->font_infos[nn - 1] + 1; 149 blend->privates [nn] = blend->privates [nn - 1] + 1; 150 blend->bboxes [nn] = blend->bboxes [nn - 1] + 1; 151 } 152 153 blend->num_designs = num_designs; 154 } 155 else if ( blend->num_designs != num_designs ) 156 goto Fail; 157 } 158 159 /* allocate axis data if needed */ 160 if ( num_axis > 0 ) 161 { 162 if ( blend->num_axis != 0 && blend->num_axis != num_axis ) 163 goto Fail; 164 165 blend->num_axis = num_axis; 166 } 167 168 Exit: 169 return error; 170 171 Fail: 172 error = FT_THROW( Invalid_File_Format ); 173 goto Exit; 174 } 175 176 177 FT_LOCAL_DEF( FT_Error ) 178 T1_Get_Multi_Master( FT_Face face, /* T1_Face */ 179 FT_Multi_Master* master ) 180 { 181 T1_Face t1face = (T1_Face)face; 182 PS_Blend blend = t1face->blend; 183 FT_UInt n; 184 FT_Error error; 185 186 187 error = FT_THROW( Invalid_Argument ); 188 189 if ( blend ) 190 { 191 master->num_axis = blend->num_axis; 192 master->num_designs = blend->num_designs; 193 194 for ( n = 0; n < blend->num_axis; n++ ) 195 { 196 FT_MM_Axis* axis = master->axis + n; 197 PS_DesignMap map = blend->design_map + n; 198 199 200 axis->name = blend->axis_names[n]; 201 axis->minimum = map->design_points[0]; 202 axis->maximum = map->design_points[map->num_points - 1]; 203 } 204 205 error = FT_Err_Ok; 206 } 207 208 return error; 209 } 210 211 212 /************************************************************************** 213 * 214 * Given a normalized (blend) coordinate, figure out the design 215 * coordinate appropriate for that value. 216 */ 217 static FT_Fixed 218 mm_axis_unmap( PS_DesignMap axismap, 219 FT_Fixed ncv ) 220 { 221 int j; 222 223 224 if ( ncv <= axismap->blend_points[0] ) 225 return INT_TO_FIXED( axismap->design_points[0] ); 226 227 for ( j = 1; j < axismap->num_points; j++ ) 228 { 229 if ( ncv <= axismap->blend_points[j] ) 230 return INT_TO_FIXED( axismap->design_points[j - 1] + 231 FT_MulDiv( ncv - axismap->blend_points[j - 1], 232 axismap->design_points[j] - 233 axismap->design_points[j - 1], 234 axismap->blend_points[j] - 235 axismap->blend_points[j - 1] ) ); 236 } 237 238 return INT_TO_FIXED( axismap->design_points[axismap->num_points - 1] ); 239 } 240 241 242 /************************************************************************** 243 * 244 * Given a vector of weights, one for each design, figure out the 245 * normalized axis coordinates which gave rise to those weights. 246 */ 247 static void 248 mm_weights_unmap( FT_Fixed* weights, 249 FT_Fixed* axiscoords, 250 FT_UInt axis_count ) 251 { 252 FT_ASSERT( axis_count <= T1_MAX_MM_AXIS ); 253 254 if ( axis_count == 1 ) 255 axiscoords[0] = weights[1]; 256 257 else if ( axis_count == 2 ) 258 { 259 axiscoords[0] = weights[3] + weights[1]; 260 axiscoords[1] = weights[3] + weights[2]; 261 } 262 263 else if ( axis_count == 3 ) 264 { 265 axiscoords[0] = weights[7] + weights[5] + weights[3] + weights[1]; 266 axiscoords[1] = weights[7] + weights[6] + weights[3] + weights[2]; 267 axiscoords[2] = weights[7] + weights[6] + weights[5] + weights[4]; 268 } 269 270 else 271 { 272 axiscoords[0] = weights[15] + weights[13] + weights[11] + weights[9] + 273 weights[7] + weights[5] + weights[3] + weights[1]; 274 axiscoords[1] = weights[15] + weights[14] + weights[11] + weights[10] + 275 weights[7] + weights[6] + weights[3] + weights[2]; 276 axiscoords[2] = weights[15] + weights[14] + weights[13] + weights[12] + 277 weights[7] + weights[6] + weights[5] + weights[4]; 278 axiscoords[3] = weights[15] + weights[14] + weights[13] + weights[12] + 279 weights[11] + weights[10] + weights[9] + weights[8]; 280 } 281 } 282 283 284 /************************************************************************** 285 * 286 * Just a wrapper around T1_Get_Multi_Master to support the different 287 * arguments needed by the GX var distortable fonts. 288 */ 289 FT_LOCAL_DEF( FT_Error ) 290 T1_Get_MM_Var( FT_Face face, /* T1_Face */ 291 FT_MM_Var* *master ) 292 { 293 T1_Face t1face = (T1_Face)face; 294 FT_Memory memory = FT_FACE_MEMORY( face ); 295 FT_MM_Var *mmvar = NULL; 296 FT_Multi_Master mmaster; 297 FT_Error error; 298 FT_UInt i; 299 FT_Fixed axiscoords[T1_MAX_MM_AXIS]; 300 PS_Blend blend = t1face->blend; 301 FT_UShort* axis_flags; 302 303 FT_Offset mmvar_size; 304 FT_Offset axis_flags_size; 305 FT_Offset axis_size; 306 307 308 error = T1_Get_Multi_Master( face, &mmaster ); 309 if ( error ) 310 goto Exit; 311 312 /* the various `*_size' variables, which we also use as */ 313 /* offsets into the `mmvar' array, must be multiples of the */ 314 /* pointer size (except the last one); without such an */ 315 /* alignment there might be runtime errors due to */ 316 /* misaligned addresses */ 317 #undef ALIGN_SIZE 318 #define ALIGN_SIZE( n ) \ 319 ( ( (n) + sizeof (void*) - 1 ) & ~( sizeof (void*) - 1 ) ) 320 321 mmvar_size = ALIGN_SIZE( sizeof ( FT_MM_Var ) ); 322 axis_flags_size = ALIGN_SIZE( mmaster.num_axis * 323 sizeof ( FT_UShort ) ); 324 axis_size = mmaster.num_axis * sizeof ( FT_Var_Axis ); 325 326 if ( FT_QALLOC( mmvar, mmvar_size + 327 axis_flags_size + 328 axis_size ) ) 329 goto Exit; 330 331 mmvar->num_axis = mmaster.num_axis; 332 mmvar->num_designs = mmaster.num_designs; 333 mmvar->num_namedstyles = 0; /* Not supported */ 334 335 /* while axis flags are meaningless here, we have to provide the array */ 336 /* to make `FT_Get_Var_Axis_Flags' work: the function expects that the */ 337 /* values directly follow the data of `FT_MM_Var' */ 338 axis_flags = (FT_UShort*)( (char*)mmvar + mmvar_size ); 339 FT_ARRAY_ZERO( axis_flags, mmaster.num_axis ); 340 341 mmvar->axis = (FT_Var_Axis*)( (char*)axis_flags + axis_flags_size ); 342 mmvar->namedstyle = NULL; 343 344 for ( i = 0; i < mmaster.num_axis; i++ ) 345 { 346 mmvar->axis[i].name = mmaster.axis[i].name; 347 mmvar->axis[i].minimum = INT_TO_FIXED( mmaster.axis[i].minimum ); 348 mmvar->axis[i].maximum = INT_TO_FIXED( mmaster.axis[i].maximum ); 349 mmvar->axis[i].strid = ~0U; /* Does not apply */ 350 mmvar->axis[i].tag = ~0U; /* Does not apply */ 351 352 if ( !mmvar->axis[i].name ) 353 continue; 354 355 if ( ft_strcmp( mmvar->axis[i].name, "Weight" ) == 0 ) 356 mmvar->axis[i].tag = FT_MAKE_TAG( 'w', 'g', 'h', 't' ); 357 else if ( ft_strcmp( mmvar->axis[i].name, "Width" ) == 0 ) 358 mmvar->axis[i].tag = FT_MAKE_TAG( 'w', 'd', 't', 'h' ); 359 else if ( ft_strcmp( mmvar->axis[i].name, "OpticalSize" ) == 0 ) 360 mmvar->axis[i].tag = FT_MAKE_TAG( 'o', 'p', 's', 'z' ); 361 else if ( ft_strcmp( mmvar->axis[i].name, "Slant" ) == 0 ) 362 mmvar->axis[i].tag = FT_MAKE_TAG( 's', 'l', 'n', 't' ); 363 else if ( ft_strcmp( mmvar->axis[i].name, "Italic" ) == 0 ) 364 mmvar->axis[i].tag = FT_MAKE_TAG( 'i', 't', 'a', 'l' ); 365 } 366 367 mm_weights_unmap( blend->default_weight_vector, 368 axiscoords, 369 blend->num_axis ); 370 371 for ( i = 0; i < mmaster.num_axis; i++ ) 372 mmvar->axis[i].def = mm_axis_unmap( &blend->design_map[i], 373 axiscoords[i] ); 374 375 *master = mmvar; 376 377 Exit: 378 return error; 379 } 380 381 382 static FT_Error 383 t1_set_mm_blend( T1_Face face, 384 FT_UInt num_coords, 385 FT_Fixed* coords ) 386 { 387 PS_Blend blend = face->blend; 388 FT_UInt n, m; 389 390 FT_Bool have_diff = 0; 391 392 393 if ( !blend ) 394 return FT_THROW( Invalid_Argument ); 395 396 if ( num_coords > blend->num_axis ) 397 num_coords = blend->num_axis; 398 399 /* recompute the weight vector from the blend coordinates */ 400 for ( n = 0; n < blend->num_designs; n++ ) 401 { 402 FT_Fixed result = 0x10000L; /* 1.0 fixed */ 403 FT_Fixed factor; 404 405 406 for ( m = 0; m < blend->num_axis; m++ ) 407 { 408 /* use a default value if we don't have a coordinate */ 409 if ( m >= num_coords ) 410 { 411 result >>= 1; 412 continue; 413 } 414 415 /* get current blend axis position */ 416 factor = coords[m]; 417 if ( ( n & ( 1 << m ) ) == 0 ) 418 factor = 0x10000L - factor; 419 420 if ( factor <= 0 ) 421 { 422 result = 0; 423 break; 424 } 425 else if ( factor >= 0x10000L ) 426 continue; 427 428 result = FT_MulFix( result, factor ); 429 } 430 431 if ( blend->weight_vector[n] != result ) 432 { 433 blend->weight_vector[n] = result; 434 have_diff = 1; 435 } 436 } 437 438 /* return value -1 indicates `no change' */ 439 return have_diff ? FT_Err_Ok : -1; 440 } 441 442 443 FT_LOCAL_DEF( FT_Error ) 444 T1_Set_MM_Blend( FT_Face face, /* T1_Face */ 445 FT_UInt num_coords, 446 FT_Fixed* coords ) 447 { 448 return t1_set_mm_blend( (T1_Face)face, num_coords, coords ); 449 } 450 451 452 FT_LOCAL_DEF( FT_Error ) 453 T1_Get_MM_Blend( FT_Face face, /* T1_Face */ 454 FT_UInt num_coords, 455 FT_Fixed* coords ) 456 { 457 T1_Face t1face = (T1_Face)face; 458 PS_Blend blend = t1face->blend; 459 460 FT_Fixed axiscoords[4]; 461 FT_UInt i, nc; 462 463 464 if ( !blend ) 465 return FT_THROW( Invalid_Argument ); 466 467 mm_weights_unmap( blend->weight_vector, 468 axiscoords, 469 blend->num_axis ); 470 471 nc = num_coords; 472 if ( num_coords > blend->num_axis ) 473 { 474 FT_TRACE2(( "T1_Get_MM_Blend: only using first %u of %u coordinates\n", 475 blend->num_axis, num_coords )); 476 nc = blend->num_axis; 477 } 478 479 for ( i = 0; i < nc; i++ ) 480 coords[i] = axiscoords[i]; 481 for ( ; i < num_coords; i++ ) 482 coords[i] = 0x8000; 483 484 return FT_Err_Ok; 485 } 486 487 488 FT_LOCAL_DEF( FT_Error ) 489 T1_Set_MM_WeightVector( FT_Face face, /* T1_Face */ 490 FT_UInt len, 491 FT_Fixed* weightvector ) 492 { 493 T1_Face t1face = (T1_Face)face; 494 PS_Blend blend = t1face->blend; 495 FT_UInt i, n; 496 497 498 if ( !blend ) 499 return FT_THROW( Invalid_Argument ); 500 501 if ( !len && !weightvector ) 502 { 503 for ( i = 0; i < blend->num_designs; i++ ) 504 blend->weight_vector[i] = blend->default_weight_vector[i]; 505 } 506 else 507 { 508 if ( !weightvector ) 509 return FT_THROW( Invalid_Argument ); 510 511 n = len < blend->num_designs ? len : blend->num_designs; 512 513 for ( i = 0; i < n; i++ ) 514 blend->weight_vector[i] = weightvector[i]; 515 516 for ( ; i < blend->num_designs; i++ ) 517 blend->weight_vector[i] = (FT_Fixed)0; 518 } 519 520 return FT_Err_Ok; 521 } 522 523 524 FT_LOCAL_DEF( FT_Error ) 525 T1_Get_MM_WeightVector( FT_Face face, /* T1_Face */ 526 FT_UInt* len, 527 FT_Fixed* weightvector ) 528 { 529 T1_Face t1face = (T1_Face)face; 530 PS_Blend blend = t1face->blend; 531 FT_UInt i; 532 533 534 if ( !blend ) 535 return FT_THROW( Invalid_Argument ); 536 537 if ( *len < blend->num_designs ) 538 { 539 *len = blend->num_designs; 540 return FT_THROW( Invalid_Argument ); 541 } 542 543 for ( i = 0; i < blend->num_designs; i++ ) 544 weightvector[i] = blend->weight_vector[i]; 545 for ( ; i < *len; i++ ) 546 weightvector[i] = (FT_Fixed)0; 547 548 *len = blend->num_designs; 549 550 return FT_Err_Ok; 551 } 552 553 554 FT_LOCAL_DEF( FT_Error ) 555 T1_Set_MM_Design( FT_Face face, /* T1_Face */ 556 FT_UInt num_coords, 557 FT_Long* coords ) 558 { 559 T1_Face t1face = (T1_Face)face; 560 FT_Error error; 561 PS_Blend blend = t1face->blend; 562 FT_UInt n; 563 FT_Fixed final_blends[T1_MAX_MM_DESIGNS]; 564 565 566 if ( !blend ) 567 return FT_THROW( Invalid_Argument ); 568 569 if ( num_coords > blend->num_axis ) 570 num_coords = blend->num_axis; 571 572 /* compute the blend coordinates through the blend design map */ 573 574 for ( n = 0; n < blend->num_axis; n++ ) 575 { 576 FT_Long design; 577 FT_Fixed the_blend; 578 PS_DesignMap map = blend->design_map + n; 579 FT_Long* designs = map->design_points; 580 FT_Fixed* blends = map->blend_points; 581 FT_Int p, before = -1, after = -1; 582 583 584 /* use a default value if we don't have a coordinate */ 585 if ( n < num_coords ) 586 design = coords[n]; 587 else 588 design = ( designs[map->num_points - 1] - designs[0] ) / 2; 589 590 for ( p = 0; p < (FT_Int)map->num_points; p++ ) 591 { 592 FT_Long p_design = designs[p]; 593 594 595 /* exact match? */ 596 if ( design == p_design ) 597 { 598 the_blend = blends[p]; 599 goto Found; 600 } 601 602 if ( design < p_design ) 603 { 604 after = p; 605 break; 606 } 607 608 before = p; 609 } 610 611 /* now interpolate if necessary */ 612 if ( before < 0 ) 613 the_blend = blends[0]; 614 615 else if ( after < 0 ) 616 the_blend = blends[map->num_points - 1]; 617 618 else 619 the_blend = FT_MulDiv( design - designs[before], 620 blends [after] - blends [before], 621 designs[after] - designs[before] ); 622 623 Found: 624 final_blends[n] = the_blend; 625 } 626 627 error = t1_set_mm_blend( t1face, blend->num_axis, final_blends ); 628 if ( error ) 629 return error; 630 631 return FT_Err_Ok; 632 } 633 634 635 /* MM fonts don't have named instances, so only the design is reset */ 636 637 FT_LOCAL_DEF( FT_Error ) 638 T1_Reset_MM_Blend( FT_Face face, 639 FT_UInt instance_index ) 640 { 641 FT_UNUSED( instance_index ); 642 643 return T1_Set_MM_WeightVector( face, 0, NULL ); 644 } 645 646 647 /************************************************************************** 648 * 649 * Just a wrapper around T1_Set_MM_Design to support the different 650 * arguments needed by the GX var distortable fonts. 651 */ 652 FT_LOCAL_DEF( FT_Error ) 653 T1_Set_Var_Design( FT_Face face, /* T1_Face */ 654 FT_UInt num_coords, 655 FT_Fixed* coords ) 656 { 657 FT_Long lcoords[T1_MAX_MM_AXIS]; 658 FT_UInt i; 659 660 661 if ( num_coords > T1_MAX_MM_AXIS ) 662 num_coords = T1_MAX_MM_AXIS; 663 664 for ( i = 0; i < num_coords; i++ ) 665 lcoords[i] = FIXED_TO_INT( coords[i] ); 666 667 return T1_Set_MM_Design( face, num_coords, lcoords ); 668 } 669 670 671 FT_LOCAL_DEF( FT_Error ) 672 T1_Get_Var_Design( FT_Face face, /* T1_Face */ 673 FT_UInt num_coords, 674 FT_Fixed* coords ) 675 { 676 T1_Face t1face = (T1_Face)face; 677 PS_Blend blend = t1face->blend; 678 679 FT_Fixed axiscoords[4]; 680 FT_UInt i, nc; 681 682 683 if ( !blend ) 684 return FT_THROW( Invalid_Argument ); 685 686 mm_weights_unmap( blend->weight_vector, 687 axiscoords, 688 blend->num_axis ); 689 690 nc = num_coords; 691 if ( num_coords > blend->num_axis ) 692 { 693 FT_TRACE2(( "T1_Get_Var_Design:" 694 " only using first %u of %u coordinates\n", 695 blend->num_axis, num_coords )); 696 nc = blend->num_axis; 697 } 698 699 for ( i = 0; i < nc; i++ ) 700 coords[i] = mm_axis_unmap( &blend->design_map[i], axiscoords[i] ); 701 for ( ; i < num_coords; i++ ) 702 coords[i] = 0; 703 704 return FT_Err_Ok; 705 } 706 707 708 FT_LOCAL_DEF( void ) 709 T1_Done_Blend( FT_Face face ) /* T1_Face */ 710 { 711 T1_Face t1face = (T1_Face)face; 712 FT_Memory memory = FT_FACE_MEMORY( face ); 713 PS_Blend blend = t1face->blend; 714 715 716 if ( blend ) 717 { 718 FT_UInt num_designs = blend->num_designs; 719 FT_UInt num_axis = blend->num_axis; 720 FT_UInt n; 721 722 723 /* release design pos table */ 724 FT_FREE( blend->design_pos[0] ); 725 for ( n = 1; n < num_designs; n++ ) 726 blend->design_pos[n] = NULL; 727 728 /* release blend `private' and `font info' dictionaries */ 729 FT_FREE( blend->privates[1] ); 730 FT_FREE( blend->font_infos[1] ); 731 FT_FREE( blend->bboxes[1] ); 732 733 for ( n = 0; n < num_designs; n++ ) 734 { 735 blend->privates [n] = NULL; 736 blend->font_infos[n] = NULL; 737 blend->bboxes [n] = NULL; 738 } 739 740 /* release weight vectors */ 741 FT_FREE( blend->weight_vector ); 742 blend->default_weight_vector = NULL; 743 744 /* release axis names */ 745 for ( n = 0; n < num_axis; n++ ) 746 FT_FREE( blend->axis_names[n] ); 747 748 /* release design map */ 749 for ( n = 0; n < num_axis; n++ ) 750 { 751 PS_DesignMap dmap = blend->design_map + n; 752 753 754 FT_FREE( dmap->blend_points ); 755 FT_FREE( dmap->design_points ); 756 dmap->num_points = 0; 757 } 758 759 FT_FREE( t1face->blend ); 760 } 761 } 762 763 764 static void 765 parse_blend_axis_types( FT_Face face, /* T1_Face */ 766 void* loader_ ) 767 { 768 T1_Face t1face = (T1_Face)face; 769 T1_Loader loader = (T1_Loader)loader_; 770 T1_TokenRec axis_tokens[T1_MAX_MM_AXIS]; 771 FT_Int n, num_axis; 772 FT_Error error = FT_Err_Ok; 773 PS_Blend blend; 774 FT_Memory memory = FT_FACE_MEMORY( face ); 775 776 777 /* take an array of objects */ 778 T1_ToTokenArray( &loader->parser, axis_tokens, 779 T1_MAX_MM_AXIS, &num_axis ); 780 if ( num_axis < 0 ) 781 { 782 error = FT_ERR( Ignore ); 783 goto Exit; 784 } 785 if ( num_axis == 0 || num_axis > T1_MAX_MM_AXIS ) 786 { 787 FT_ERROR(( "parse_blend_axis_types: incorrect number of axes: %d\n", 788 num_axis )); 789 error = FT_THROW( Invalid_File_Format ); 790 goto Exit; 791 } 792 793 /* allocate blend if necessary */ 794 error = t1_allocate_blend( t1face, 0, (FT_UInt)num_axis ); 795 if ( error ) 796 goto Exit; 797 798 FT_TRACE4(( " [" )); 799 800 blend = t1face->blend; 801 802 /* each token is an immediate containing the name of the axis */ 803 for ( n = 0; n < num_axis; n++ ) 804 { 805 T1_Token token = axis_tokens + n; 806 FT_Byte* name; 807 FT_UInt len; 808 809 810 /* skip first slash, if any */ 811 if ( token->start[0] == '/' ) 812 token->start++; 813 814 len = (FT_UInt)( token->limit - token->start ); 815 if ( len == 0 ) 816 { 817 error = FT_THROW( Invalid_File_Format ); 818 goto Exit; 819 } 820 821 FT_TRACE4(( " /%.*s", len, token->start )); 822 823 name = (FT_Byte*)blend->axis_names[n]; 824 if ( name ) 825 { 826 FT_TRACE0(( "parse_blend_axis_types:" 827 " overwriting axis name `%s' with `%.*s'\n", 828 name, len, token->start )); 829 FT_FREE( name ); 830 } 831 832 if ( FT_QALLOC( blend->axis_names[n], len + 1 ) ) 833 goto Exit; 834 835 name = (FT_Byte*)blend->axis_names[n]; 836 FT_MEM_COPY( name, token->start, len ); 837 name[len] = '\0'; 838 } 839 840 FT_TRACE4(( "]\n" )); 841 842 Exit: 843 loader->parser.root.error = error; 844 } 845 846 847 static void 848 parse_blend_design_positions( FT_Face face, /* T1_Face */ 849 void* loader_ ) 850 { 851 T1_Face t1face = (T1_Face)face; 852 T1_Loader loader = (T1_Loader)loader_; 853 T1_TokenRec design_tokens[T1_MAX_MM_DESIGNS]; 854 FT_Int num_designs; 855 FT_Int num_axis = 0; /* make compiler happy */ 856 T1_Parser parser = &loader->parser; 857 FT_Memory memory = FT_FACE_MEMORY( face ); 858 FT_Error error = FT_Err_Ok; 859 FT_Fixed* design_pos[T1_MAX_MM_DESIGNS]; 860 861 862 design_pos[0] = NULL; 863 864 /* get the array of design tokens -- compute number of designs */ 865 T1_ToTokenArray( parser, design_tokens, 866 T1_MAX_MM_DESIGNS, &num_designs ); 867 if ( num_designs < 0 ) 868 { 869 error = FT_ERR( Ignore ); 870 goto Exit; 871 } 872 if ( num_designs == 0 || num_designs > T1_MAX_MM_DESIGNS ) 873 { 874 FT_ERROR(( "parse_blend_design_positions:" 875 " incorrect number of designs: %d\n", 876 num_designs )); 877 error = FT_THROW( Invalid_File_Format ); 878 goto Exit; 879 } 880 881 { 882 FT_Byte* old_cursor = parser->root.cursor; 883 FT_Byte* old_limit = parser->root.limit; 884 FT_Int n, nn; 885 PS_Blend blend; 886 887 888 FT_TRACE4(( " [" )); 889 890 for ( n = 0; n < num_designs; n++ ) 891 { 892 T1_TokenRec axis_tokens[T1_MAX_MM_AXIS]; 893 T1_Token token; 894 FT_Int axis, n_axis; 895 896 897 /* read axis/coordinates tokens */ 898 token = design_tokens + n; 899 parser->root.cursor = token->start; 900 parser->root.limit = token->limit; 901 T1_ToTokenArray( parser, axis_tokens, T1_MAX_MM_AXIS, &n_axis ); 902 903 if ( n == 0 ) 904 { 905 if ( n_axis <= 0 || n_axis > T1_MAX_MM_AXIS ) 906 { 907 FT_ERROR(( "parse_blend_design_positions:" 908 " invalid number of axes: %d\n", 909 n_axis )); 910 error = FT_THROW( Invalid_File_Format ); 911 goto Exit; 912 } 913 914 num_axis = n_axis; 915 error = t1_allocate_blend( t1face, 916 (FT_UInt)num_designs, 917 (FT_UInt)num_axis ); 918 if ( error ) 919 goto Exit; 920 921 /* allocate a blend design pos table */ 922 if ( FT_QNEW_ARRAY( design_pos[0], num_designs * num_axis ) ) 923 goto Exit; 924 925 for ( nn = 1; nn < num_designs; nn++ ) 926 design_pos[nn] = design_pos[0] + num_axis * nn; 927 } 928 else if ( n_axis != num_axis ) 929 { 930 FT_ERROR(( "parse_blend_design_positions: incorrect table\n" )); 931 error = FT_THROW( Invalid_File_Format ); 932 goto Exit; 933 } 934 935 /* now read each axis token into the design position */ 936 FT_TRACE4(( " [" )) ; 937 for ( axis = 0; axis < n_axis; axis++ ) 938 { 939 T1_Token token2 = axis_tokens + axis; 940 941 942 parser->root.cursor = token2->start; 943 parser->root.limit = token2->limit; 944 design_pos[n][axis] = T1_ToFixed( parser, 0 ); 945 FT_TRACE4(( " %f", (double)design_pos[n][axis] / 65536 )); 946 } 947 FT_TRACE4(( "]" )) ; 948 } 949 950 FT_TRACE4(( "]\n" )); 951 952 loader->parser.root.cursor = old_cursor; 953 loader->parser.root.limit = old_limit; 954 955 /* a valid BlendDesignPosition has been parsed */ 956 blend = t1face->blend; 957 if ( blend->design_pos[0] ) 958 FT_FREE( blend->design_pos[0] ); 959 960 for ( n = 0; n < num_designs; n++ ) 961 { 962 blend->design_pos[n] = design_pos[n]; 963 design_pos[n] = NULL; 964 } 965 } 966 967 Exit: 968 FT_FREE( design_pos[0] ); 969 loader->parser.root.error = error; 970 } 971 972 973 static void 974 parse_blend_design_map( FT_Face face, /* T1_Face */ 975 void* loader_ ) 976 { 977 T1_Face t1face = (T1_Face)face; 978 T1_Loader loader = (T1_Loader)loader_; 979 FT_Error error = FT_Err_Ok; 980 T1_Parser parser = &loader->parser; 981 PS_Blend blend; 982 T1_TokenRec axis_tokens[T1_MAX_MM_AXIS]; 983 FT_Int n, num_axis; 984 FT_Byte* old_cursor; 985 FT_Byte* old_limit; 986 FT_Memory memory = FT_FACE_MEMORY( face ); 987 988 989 T1_ToTokenArray( parser, axis_tokens, 990 T1_MAX_MM_AXIS, &num_axis ); 991 if ( num_axis < 0 ) 992 { 993 error = FT_ERR( Ignore ); 994 goto Exit; 995 } 996 if ( num_axis == 0 || num_axis > T1_MAX_MM_AXIS ) 997 { 998 FT_ERROR(( "parse_blend_design_map: incorrect number of axes: %d\n", 999 num_axis )); 1000 error = FT_THROW( Invalid_File_Format ); 1001 goto Exit; 1002 } 1003 1004 old_cursor = parser->root.cursor; 1005 old_limit = parser->root.limit; 1006 1007 error = t1_allocate_blend( t1face, 0, (FT_UInt)num_axis ); 1008 if ( error ) 1009 goto Exit; 1010 blend = t1face->blend; 1011 1012 FT_TRACE4(( " [" )); 1013 1014 /* now read each axis design map */ 1015 for ( n = 0; n < num_axis; n++ ) 1016 { 1017 PS_DesignMap map = blend->design_map + n; 1018 T1_Token axis_token; 1019 T1_TokenRec point_tokens[T1_MAX_MM_MAP_POINTS]; 1020 FT_Int p, num_points; 1021 1022 1023 axis_token = axis_tokens + n; 1024 1025 parser->root.cursor = axis_token->start; 1026 parser->root.limit = axis_token->limit; 1027 T1_ToTokenArray( parser, point_tokens, 1028 T1_MAX_MM_MAP_POINTS, &num_points ); 1029 1030 FT_TRACE4(( " [" )); 1031 1032 if ( num_points <= 0 || num_points > T1_MAX_MM_MAP_POINTS ) 1033 { 1034 FT_ERROR(( "parse_blend_design_map: incorrect table\n" )); 1035 error = FT_THROW( Invalid_File_Format ); 1036 goto Exit; 1037 } 1038 1039 if ( map->design_points ) 1040 { 1041 FT_ERROR(( "parse_blend_design_map: duplicate table\n" )); 1042 error = FT_THROW( Invalid_File_Format ); 1043 goto Exit; 1044 } 1045 1046 /* allocate design map data */ 1047 if ( FT_QNEW_ARRAY( map->design_points, num_points ) || 1048 FT_QNEW_ARRAY( map->blend_points, num_points ) ) 1049 goto Exit; 1050 map->num_points = (FT_Byte)num_points; 1051 1052 for ( p = 0; p < num_points; p++ ) 1053 { 1054 T1_Token point_token; 1055 1056 1057 point_token = point_tokens + p; 1058 1059 /* don't include delimiting brackets */ 1060 parser->root.cursor = point_token->start + 1; 1061 parser->root.limit = point_token->limit - 1; 1062 1063 map->design_points[p] = T1_ToInt( parser ); 1064 map->blend_points [p] = T1_ToFixed( parser, 0 ); 1065 1066 FT_TRACE4(( " [%ld %f]", 1067 map->design_points[p], 1068 (double)map->blend_points[p] / 65536 )); 1069 } 1070 1071 FT_TRACE4(( "]" )); 1072 } 1073 1074 FT_TRACE4(( "]\n" )); 1075 1076 parser->root.cursor = old_cursor; 1077 parser->root.limit = old_limit; 1078 1079 Exit: 1080 parser->root.error = error; 1081 } 1082 1083 1084 static void 1085 parse_weight_vector( FT_Face face, /* T1_Face */ 1086 void* loader_ ) 1087 { 1088 T1_Face t1face = (T1_Face)face; 1089 T1_Loader loader = (T1_Loader)loader_; 1090 T1_TokenRec design_tokens[T1_MAX_MM_DESIGNS]; 1091 FT_Int num_designs; 1092 FT_Error error = FT_Err_Ok; 1093 FT_Memory memory = FT_FACE_MEMORY( face ); 1094 T1_Parser parser = &loader->parser; 1095 PS_Blend blend = t1face->blend; 1096 T1_Token token; 1097 FT_Int n; 1098 FT_Byte* old_cursor; 1099 FT_Byte* old_limit; 1100 1101 1102 T1_ToTokenArray( parser, design_tokens, 1103 T1_MAX_MM_DESIGNS, &num_designs ); 1104 if ( num_designs < 0 ) 1105 { 1106 error = FT_ERR( Ignore ); 1107 goto Exit; 1108 } 1109 if ( num_designs == 0 || num_designs > T1_MAX_MM_DESIGNS ) 1110 { 1111 FT_ERROR(( "parse_weight_vector:" 1112 " incorrect number of designs: %d\n", 1113 num_designs )); 1114 error = FT_THROW( Invalid_File_Format ); 1115 goto Exit; 1116 } 1117 1118 if ( !blend || !blend->num_designs ) 1119 { 1120 error = t1_allocate_blend( t1face, (FT_UInt)num_designs, 0 ); 1121 if ( error ) 1122 goto Exit; 1123 blend = t1face->blend; 1124 } 1125 else if ( blend->num_designs != (FT_UInt)num_designs ) 1126 { 1127 FT_ERROR(( "parse_weight_vector:" 1128 " /BlendDesignPosition and /WeightVector have\n" )); 1129 FT_ERROR(( " " 1130 " different number of elements\n" )); 1131 error = FT_THROW( Invalid_File_Format ); 1132 goto Exit; 1133 } 1134 1135 if ( !blend->weight_vector ) 1136 if ( FT_QNEW_ARRAY( blend->weight_vector, num_designs * 2 ) ) 1137 goto Exit; 1138 1139 blend->default_weight_vector = blend->weight_vector + num_designs; 1140 1141 old_cursor = parser->root.cursor; 1142 old_limit = parser->root.limit; 1143 1144 FT_TRACE4(( "[" )); 1145 1146 for ( n = 0; n < num_designs; n++ ) 1147 { 1148 token = design_tokens + n; 1149 parser->root.cursor = token->start; 1150 parser->root.limit = token->limit; 1151 1152 blend->default_weight_vector[n] = 1153 blend->weight_vector[n] = T1_ToFixed( parser, 0 ); 1154 1155 FT_TRACE4(( " %f", (double)blend->weight_vector[n] / 65536 )); 1156 } 1157 1158 FT_TRACE4(( "]\n" )); 1159 1160 parser->root.cursor = old_cursor; 1161 parser->root.limit = old_limit; 1162 1163 Exit: 1164 parser->root.error = error; 1165 } 1166 1167 1168 /* e.g., /BuildCharArray [0 0 0 0 0 0 0 0] def */ 1169 /* we're only interested in the number of array elements */ 1170 static void 1171 parse_buildchar( FT_Face face, /* T1_Face */ 1172 void* loader_ ) 1173 { 1174 T1_Face t1face = (T1_Face)face; 1175 T1_Loader loader = (T1_Loader)loader_; 1176 1177 1178 t1face->len_buildchar = (FT_UInt)T1_ToFixedArray( &loader->parser, 1179 0, NULL, 0 ); 1180 1181 #ifdef FT_DEBUG_LEVEL_TRACE 1182 { 1183 FT_UInt i; 1184 1185 1186 FT_TRACE4(( " [" )); 1187 for ( i = 0; i < t1face->len_buildchar; i++ ) 1188 FT_TRACE4(( " 0" )); 1189 1190 FT_TRACE4(( "]\n" )); 1191 } 1192 #endif 1193 1194 return; 1195 } 1196 1197 1198 #endif /* !T1_CONFIG_OPTION_NO_MM_SUPPORT */ 1199 1200 1201 1202 1203 /*************************************************************************/ 1204 /*************************************************************************/ 1205 /***** *****/ 1206 /***** TYPE 1 SYMBOL PARSING *****/ 1207 /***** *****/ 1208 /*************************************************************************/ 1209 /*************************************************************************/ 1210 1211 static FT_Error 1212 t1_load_keyword( T1_Face face, 1213 T1_Loader loader, 1214 const T1_Field field ) 1215 { 1216 FT_Error error; 1217 void* dummy_object; 1218 void** objects; 1219 FT_UInt max_objects; 1220 PS_Blend blend = face->blend; 1221 1222 1223 if ( blend && blend->num_designs == 0 ) 1224 blend = NULL; 1225 1226 /* if the keyword has a dedicated callback, call it */ 1227 if ( field->type == T1_FIELD_TYPE_CALLBACK ) 1228 { 1229 FT_TRACE4(( " %s", field->ident )); 1230 1231 field->reader( (FT_Face)face, loader ); 1232 error = loader->parser.root.error; 1233 goto Exit; 1234 } 1235 1236 /* now, the keyword is either a simple field, or a table of fields; */ 1237 /* we are now going to take care of it */ 1238 switch ( field->location ) 1239 { 1240 case T1_FIELD_LOCATION_FONT_INFO: 1241 dummy_object = &face->type1.font_info; 1242 objects = &dummy_object; 1243 max_objects = 0; 1244 1245 if ( blend ) 1246 { 1247 objects = (void**)blend->font_infos; 1248 max_objects = blend->num_designs; 1249 } 1250 break; 1251 1252 case T1_FIELD_LOCATION_FONT_EXTRA: 1253 dummy_object = &face->type1.font_extra; 1254 objects = &dummy_object; 1255 max_objects = 0; 1256 break; 1257 1258 case T1_FIELD_LOCATION_PRIVATE: 1259 dummy_object = &face->type1.private_dict; 1260 objects = &dummy_object; 1261 max_objects = 0; 1262 1263 if ( blend ) 1264 { 1265 objects = (void**)blend->privates; 1266 max_objects = blend->num_designs; 1267 } 1268 break; 1269 1270 case T1_FIELD_LOCATION_BBOX: 1271 dummy_object = &face->type1.font_bbox; 1272 objects = &dummy_object; 1273 max_objects = 0; 1274 1275 if ( blend ) 1276 { 1277 objects = (void**)blend->bboxes; 1278 max_objects = blend->num_designs; 1279 } 1280 break; 1281 1282 case T1_FIELD_LOCATION_LOADER: 1283 dummy_object = loader; 1284 objects = &dummy_object; 1285 max_objects = 0; 1286 break; 1287 1288 case T1_FIELD_LOCATION_FACE: 1289 dummy_object = face; 1290 objects = &dummy_object; 1291 max_objects = 0; 1292 break; 1293 1294 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 1295 case T1_FIELD_LOCATION_BLEND: 1296 dummy_object = face->blend; 1297 objects = &dummy_object; 1298 max_objects = 0; 1299 break; 1300 #endif 1301 1302 default: 1303 dummy_object = &face->type1; 1304 objects = &dummy_object; 1305 max_objects = 0; 1306 } 1307 1308 FT_TRACE4(( " %s", field->ident )); 1309 1310 if ( *objects ) 1311 { 1312 if ( field->type == T1_FIELD_TYPE_INTEGER_ARRAY || 1313 field->type == T1_FIELD_TYPE_FIXED_ARRAY ) 1314 error = T1_Load_Field_Table( &loader->parser, field, 1315 objects, max_objects, 0 ); 1316 else 1317 error = T1_Load_Field( &loader->parser, field, 1318 objects, max_objects, 0 ); 1319 } 1320 else 1321 { 1322 FT_TRACE1(( "t1_load_keyword: ignoring keyword `%s'" 1323 " which is not valid at this point\n", 1324 field->ident )); 1325 FT_TRACE1(( " (probably due to missing keywords)\n" )); 1326 error = FT_Err_Ok; 1327 } 1328 1329 FT_TRACE4(( "\n" )); 1330 1331 Exit: 1332 return error; 1333 } 1334 1335 1336 static void 1337 parse_private( FT_Face face, 1338 void* loader_ ) 1339 { 1340 T1_Loader loader = (T1_Loader)loader_; 1341 FT_UNUSED( face ); 1342 1343 loader->keywords_encountered |= T1_PRIVATE; 1344 1345 FT_TRACE4(( "\n" )); 1346 } 1347 1348 1349 /* return 1 in case of success */ 1350 1351 static int 1352 read_binary_data( T1_Parser parser, 1353 FT_ULong* size, 1354 FT_Byte** base, 1355 FT_Bool incremental ) 1356 { 1357 FT_Byte* cur; 1358 FT_Byte* limit = parser->root.limit; 1359 1360 1361 /* the binary data has one of the following formats */ 1362 /* */ 1363 /* `size' [white*] RD white ....... ND */ 1364 /* `size' [white*] -| white ....... |- */ 1365 /* */ 1366 1367 T1_Skip_Spaces( parser ); 1368 1369 cur = parser->root.cursor; 1370 1371 if ( cur < limit && ft_isdigit( *cur ) ) 1372 { 1373 FT_Long s = T1_ToInt( parser ); 1374 1375 1376 T1_Skip_PS_Token( parser ); /* `RD' or `-|' or something else */ 1377 1378 /* there is only one whitespace char after the */ 1379 /* `RD' or `-|' token */ 1380 *base = parser->root.cursor + 1; 1381 1382 if ( s >= 0 && s < limit - *base ) 1383 { 1384 parser->root.cursor += s + 1; 1385 *size = (FT_ULong)s; 1386 return !parser->root.error; 1387 } 1388 } 1389 1390 if( !incremental ) 1391 { 1392 FT_ERROR(( "read_binary_data: invalid size field\n" )); 1393 parser->root.error = FT_THROW( Invalid_File_Format ); 1394 } 1395 1396 return 0; 1397 } 1398 1399 1400 /* We now define the routines to handle the `/Encoding', `/Subrs', */ 1401 /* and `/CharStrings' dictionaries. */ 1402 1403 static void 1404 t1_parse_font_matrix( FT_Face face, /* T1_Face */ 1405 void* loader_ ) 1406 { 1407 T1_Face t1face = (T1_Face)face; 1408 T1_Loader loader = (T1_Loader)loader_; 1409 T1_Parser parser = &loader->parser; 1410 FT_Matrix* matrix = &t1face->type1.font_matrix; 1411 FT_Vector* offset = &t1face->type1.font_offset; 1412 FT_Fixed temp[6]; 1413 FT_Fixed temp_scale; 1414 FT_Int result; 1415 1416 1417 /* input is scaled by 1000 to accommodate default FontMatrix */ 1418 result = T1_ToFixedArray( parser, 6, temp, 3 ); 1419 1420 if ( result < 6 ) 1421 { 1422 parser->root.error = FT_THROW( Invalid_File_Format ); 1423 return; 1424 } 1425 1426 FT_TRACE4(( " [%f %f %f %f %f %f]\n", 1427 (double)temp[0] / 65536 / 1000, 1428 (double)temp[1] / 65536 / 1000, 1429 (double)temp[2] / 65536 / 1000, 1430 (double)temp[3] / 65536 / 1000, 1431 (double)temp[4] / 65536 / 1000, 1432 (double)temp[5] / 65536 / 1000 )); 1433 1434 temp_scale = FT_ABS( temp[3] ); 1435 1436 if ( temp_scale == 0 ) 1437 { 1438 FT_ERROR(( "t1_parse_font_matrix: invalid font matrix\n" )); 1439 parser->root.error = FT_THROW( Invalid_File_Format ); 1440 return; 1441 } 1442 1443 /* atypical case */ 1444 if ( temp_scale != 0x10000L ) 1445 { 1446 /* set units per EM based on FontMatrix values */ 1447 face->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale ); 1448 1449 temp[0] = FT_DivFix( temp[0], temp_scale ); 1450 temp[1] = FT_DivFix( temp[1], temp_scale ); 1451 temp[2] = FT_DivFix( temp[2], temp_scale ); 1452 temp[4] = FT_DivFix( temp[4], temp_scale ); 1453 temp[5] = FT_DivFix( temp[5], temp_scale ); 1454 temp[3] = temp[3] < 0 ? -0x10000L : 0x10000L; 1455 } 1456 matrix->xx = temp[0]; 1457 matrix->yx = temp[1]; 1458 matrix->xy = temp[2]; 1459 matrix->yy = temp[3]; 1460 1461 if ( !FT_Matrix_Check( matrix ) ) 1462 { 1463 FT_ERROR(( "t1_parse_font_matrix: invalid font matrix\n" )); 1464 parser->root.error = FT_THROW( Invalid_File_Format ); 1465 return; 1466 } 1467 1468 /* note that the offsets must be expressed in integer font units */ 1469 offset->x = temp[4] >> 16; 1470 offset->y = temp[5] >> 16; 1471 } 1472 1473 1474 static void 1475 parse_encoding( FT_Face face, /* T1_Face */ 1476 void* loader_ ) 1477 { 1478 T1_Face t1face = (T1_Face)face; 1479 T1_Loader loader = (T1_Loader)loader_; 1480 T1_Parser parser = &loader->parser; 1481 FT_Byte* cur; 1482 FT_Byte* limit = parser->root.limit; 1483 1484 PSAux_Service psaux = (PSAux_Service)t1face->psaux; 1485 1486 1487 T1_Skip_Spaces( parser ); 1488 cur = parser->root.cursor; 1489 if ( cur >= limit ) 1490 { 1491 FT_ERROR(( "parse_encoding: out of bounds\n" )); 1492 parser->root.error = FT_THROW( Invalid_File_Format ); 1493 return; 1494 } 1495 1496 /* if we have a number or `[', the encoding is an array, */ 1497 /* and we must load it now */ 1498 if ( ft_isdigit( *cur ) || *cur == '[' ) 1499 { 1500 T1_Encoding encode = &t1face->type1.encoding; 1501 FT_Int count, array_size, n; 1502 PS_Table char_table = &loader->encoding_table; 1503 FT_Memory memory = parser->root.memory; 1504 FT_Error error; 1505 FT_Bool only_immediates = 0; 1506 1507 1508 /* read the number of entries in the encoding; should be 256 */ 1509 if ( *cur == '[' ) 1510 { 1511 count = 256; 1512 only_immediates = 1; 1513 parser->root.cursor++; 1514 } 1515 else 1516 count = (FT_Int)T1_ToInt( parser ); 1517 1518 array_size = count; 1519 if ( count > 256 ) 1520 { 1521 FT_TRACE2(( "parse_encoding:" 1522 " only using first 256 encoding array entries\n" )); 1523 array_size = 256; 1524 } 1525 1526 T1_Skip_Spaces( parser ); 1527 if ( parser->root.cursor >= limit ) 1528 return; 1529 1530 /* PostScript happily allows overwriting of encoding arrays */ 1531 if ( encode->char_index ) 1532 { 1533 FT_FREE( encode->char_index ); 1534 FT_FREE( encode->char_name ); 1535 T1_Release_Table( char_table ); 1536 } 1537 1538 /* we use a T1_Table to store our charnames */ 1539 loader->num_chars = encode->num_chars = array_size; 1540 if ( FT_QNEW_ARRAY( encode->char_index, array_size ) || 1541 FT_QNEW_ARRAY( encode->char_name, array_size ) || 1542 FT_SET_ERROR( psaux->ps_table_funcs->init( 1543 char_table, array_size, memory ) ) ) 1544 { 1545 parser->root.error = error; 1546 return; 1547 } 1548 1549 /* We need to `zero' out encoding_table.elements */ 1550 for ( n = 0; n < array_size; n++ ) 1551 (void)T1_Add_Table( char_table, n, ".notdef", 8 ); 1552 1553 /* Now we need to read records of the form */ 1554 /* */ 1555 /* ... charcode /charname ... */ 1556 /* */ 1557 /* for each entry in our table. */ 1558 /* */ 1559 /* We simply look for a number followed by an immediate */ 1560 /* name. Note that this ignores correctly the sequence */ 1561 /* that is often seen in type1 fonts: */ 1562 /* */ 1563 /* 0 1 255 { 1 index exch /.notdef put } for dup */ 1564 /* */ 1565 /* used to clean the encoding array before anything else. */ 1566 /* */ 1567 /* Alternatively, if the array is directly given as */ 1568 /* */ 1569 /* /Encoding [ ... ] */ 1570 /* */ 1571 /* we only read immediates. */ 1572 1573 n = 0; 1574 T1_Skip_Spaces( parser ); 1575 1576 while ( parser->root.cursor < limit ) 1577 { 1578 cur = parser->root.cursor; 1579 1580 /* we stop when we encounter a `def' or `]' */ 1581 if ( *cur == 'd' && cur + 3 < limit ) 1582 { 1583 if ( cur[1] == 'e' && 1584 cur[2] == 'f' && 1585 IS_PS_DELIM( cur[3] ) ) 1586 { 1587 FT_TRACE6(( "encoding end\n" )); 1588 cur += 3; 1589 break; 1590 } 1591 } 1592 if ( *cur == ']' ) 1593 { 1594 FT_TRACE6(( "encoding end\n" )); 1595 cur++; 1596 break; 1597 } 1598 1599 /* check whether we've found an entry */ 1600 if ( ft_isdigit( *cur ) || only_immediates ) 1601 { 1602 FT_Int charcode; 1603 1604 1605 if ( only_immediates ) 1606 charcode = n; 1607 else 1608 { 1609 charcode = (FT_Int)T1_ToInt( parser ); 1610 T1_Skip_Spaces( parser ); 1611 1612 /* protect against invalid charcode */ 1613 if ( cur == parser->root.cursor ) 1614 { 1615 parser->root.error = FT_THROW( Unknown_File_Format ); 1616 return; 1617 } 1618 } 1619 1620 cur = parser->root.cursor; 1621 1622 if ( cur + 2 < limit && *cur == '/' && n < count ) 1623 { 1624 FT_UInt len; 1625 1626 1627 cur++; 1628 1629 parser->root.cursor = cur; 1630 T1_Skip_PS_Token( parser ); 1631 if ( parser->root.cursor >= limit ) 1632 return; 1633 if ( parser->root.error ) 1634 return; 1635 1636 len = (FT_UInt)( parser->root.cursor - cur ); 1637 1638 if ( n < array_size ) 1639 { 1640 parser->root.error = T1_Add_Table( char_table, charcode, 1641 cur, len + 1 ); 1642 if ( parser->root.error ) 1643 return; 1644 char_table->elements[charcode][len] = '\0'; 1645 } 1646 1647 n++; 1648 } 1649 else if ( only_immediates ) 1650 { 1651 /* Since the current position is not updated for */ 1652 /* immediates-only mode we would get an infinite loop if */ 1653 /* we don't do anything here. */ 1654 /* */ 1655 /* This encoding array is not valid according to the type1 */ 1656 /* specification (it might be an encoding for a CID type1 */ 1657 /* font, however), so we conclude that this font is NOT a */ 1658 /* type1 font. */ 1659 parser->root.error = FT_THROW( Unknown_File_Format ); 1660 return; 1661 } 1662 } 1663 else 1664 { 1665 T1_Skip_PS_Token( parser ); 1666 if ( parser->root.error ) 1667 return; 1668 } 1669 1670 T1_Skip_Spaces( parser ); 1671 } 1672 1673 #ifdef FT_DEBUG_LEVEL_TRACE 1674 FT_TRACE4(( " [" )); 1675 1676 /* XXX show encoding vector */ 1677 FT_TRACE4(( "..." )); 1678 1679 FT_TRACE4(( "]\n" )); 1680 #endif 1681 1682 t1face->type1.encoding_type = T1_ENCODING_TYPE_ARRAY; 1683 parser->root.cursor = cur; 1684 } 1685 1686 /* Otherwise, we should have either `StandardEncoding', */ 1687 /* `ExpertEncoding', or `ISOLatin1Encoding' */ 1688 else 1689 { 1690 if ( cur + 17 < limit && 1691 ft_strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 ) 1692 { 1693 t1face->type1.encoding_type = T1_ENCODING_TYPE_STANDARD; 1694 FT_TRACE4(( " StandardEncoding\n" )); 1695 } 1696 1697 else if ( cur + 15 < limit && 1698 ft_strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 ) 1699 { 1700 t1face->type1.encoding_type = T1_ENCODING_TYPE_EXPERT; 1701 FT_TRACE4(( " ExpertEncoding\n" )); 1702 } 1703 1704 else if ( cur + 18 < limit && 1705 ft_strncmp( (const char*)cur, "ISOLatin1Encoding", 17 ) == 0 ) 1706 { 1707 t1face->type1.encoding_type = T1_ENCODING_TYPE_ISOLATIN1; 1708 FT_TRACE4(( " ISOLatin1Encoding\n" )); 1709 } 1710 1711 else 1712 { 1713 parser->root.error = FT_ERR( Ignore ); 1714 FT_TRACE4(( "<unknown>\n" )); 1715 } 1716 } 1717 } 1718 1719 1720 static void 1721 parse_subrs( FT_Face face, /* T1_Face */ 1722 void* loader_ ) 1723 { 1724 T1_Face t1face = (T1_Face)face; 1725 T1_Loader loader = (T1_Loader)loader_; 1726 T1_Parser parser = &loader->parser; 1727 PS_Table table = &loader->subrs; 1728 FT_Memory memory = parser->root.memory; 1729 FT_Error error; 1730 FT_Int num_subrs; 1731 FT_UInt count; 1732 1733 PSAux_Service psaux = (PSAux_Service)t1face->psaux; 1734 1735 1736 T1_Skip_Spaces( parser ); 1737 1738 /* test for empty array */ 1739 if ( parser->root.cursor < parser->root.limit && 1740 *parser->root.cursor == '[' ) 1741 { 1742 T1_Skip_PS_Token( parser ); 1743 T1_Skip_Spaces ( parser ); 1744 if ( parser->root.cursor >= parser->root.limit || 1745 *parser->root.cursor != ']' ) 1746 parser->root.error = FT_THROW( Invalid_File_Format ); 1747 return; 1748 } 1749 1750 num_subrs = (FT_Int)T1_ToInt( parser ); 1751 if ( num_subrs < 0 ) 1752 { 1753 parser->root.error = FT_THROW( Invalid_File_Format ); 1754 return; 1755 } 1756 1757 /* we certainly need more than 8 bytes per subroutine */ 1758 if ( parser->root.limit >= parser->root.cursor && 1759 num_subrs > ( parser->root.limit - parser->root.cursor ) >> 3 ) 1760 { 1761 /* 1762 * There are two possibilities. Either the font contains an invalid 1763 * value for `num_subrs', or we have a subsetted font where the 1764 * subroutine indices are not adjusted, e.g. 1765 * 1766 * /Subrs 812 array 1767 * dup 0 { ... } NP 1768 * dup 51 { ... } NP 1769 * dup 681 { ... } NP 1770 * ND 1771 * 1772 * In both cases, we use a number hash that maps from subr indices to 1773 * actual array elements. 1774 */ 1775 1776 FT_TRACE0(( "parse_subrs: adjusting number of subroutines" 1777 " (from %d to %zu)\n", 1778 num_subrs, 1779 ( parser->root.limit - parser->root.cursor ) >> 3 )); 1780 num_subrs = ( parser->root.limit - parser->root.cursor ) >> 3; 1781 1782 if ( !loader->subrs_hash ) 1783 { 1784 if ( FT_QNEW( loader->subrs_hash ) ) 1785 goto Fail; 1786 1787 error = ft_hash_num_init( loader->subrs_hash, memory ); 1788 if ( error ) 1789 goto Fail; 1790 } 1791 } 1792 1793 /* position the parser right before the `dup' of the first subr */ 1794 T1_Skip_PS_Token( parser ); /* `array' */ 1795 if ( parser->root.error ) 1796 return; 1797 T1_Skip_Spaces( parser ); 1798 1799 /* initialize subrs array -- with synthetic fonts it is possible */ 1800 /* we get here twice */ 1801 if ( !loader->num_subrs ) 1802 { 1803 error = psaux->ps_table_funcs->init( table, num_subrs, memory ); 1804 if ( error ) 1805 goto Fail; 1806 } 1807 1808 /* the format is simple: */ 1809 /* */ 1810 /* `index' + binary data */ 1811 /* */ 1812 for ( count = 0; ; count++ ) 1813 { 1814 FT_Long idx; 1815 FT_ULong size; 1816 FT_Byte* base; 1817 1818 1819 /* If we are out of data, or if the next token isn't `dup', */ 1820 /* we are done. */ 1821 if ( parser->root.cursor + 4 >= parser->root.limit || 1822 ft_strncmp( (char*)parser->root.cursor, "dup", 3 ) != 0 ) 1823 break; 1824 1825 T1_Skip_PS_Token( parser ); /* `dup' */ 1826 1827 idx = T1_ToInt( parser ); 1828 1829 if ( !read_binary_data( parser, &size, &base, IS_INCREMENTAL ) ) 1830 return; 1831 1832 /* The binary string is followed by one token, e.g. `NP' */ 1833 /* (bound to `noaccess put') or by two separate tokens: */ 1834 /* `noaccess' & `put'. We position the parser right */ 1835 /* before the next `dup', if any. */ 1836 T1_Skip_PS_Token( parser ); /* `NP' or `|' or `noaccess' */ 1837 if ( parser->root.error ) 1838 return; 1839 T1_Skip_Spaces ( parser ); 1840 1841 if ( parser->root.cursor + 4 < parser->root.limit && 1842 ft_strncmp( (char*)parser->root.cursor, "put", 3 ) == 0 ) 1843 { 1844 T1_Skip_PS_Token( parser ); /* skip `put' */ 1845 T1_Skip_Spaces ( parser ); 1846 } 1847 1848 /* if we use a hash, the subrs index is the key, and a running */ 1849 /* counter specified for `T1_Add_Table' acts as the value */ 1850 if ( loader->subrs_hash ) 1851 { 1852 ft_hash_num_insert( idx, count, loader->subrs_hash, memory ); 1853 idx = count; 1854 } 1855 1856 /* with synthetic fonts it is possible we get here twice */ 1857 if ( loader->num_subrs ) 1858 continue; 1859 1860 /* some fonts use a value of -1 for lenIV to indicate that */ 1861 /* the charstrings are unencoded */ 1862 /* */ 1863 /* thanks to Tom Kacvinsky for pointing this out */ 1864 /* */ 1865 if ( t1face->type1.private_dict.lenIV >= 0 ) 1866 { 1867 FT_Byte* temp = NULL; 1868 1869 1870 /* some fonts define empty subr records -- this is not totally */ 1871 /* compliant to the specification (which says they should at */ 1872 /* least contain a `return'), but we support them anyway */ 1873 if ( size < (FT_ULong)t1face->type1.private_dict.lenIV ) 1874 { 1875 error = FT_THROW( Invalid_File_Format ); 1876 goto Fail; 1877 } 1878 1879 /* t1_decrypt() shouldn't write to base -- make temporary copy */ 1880 if ( FT_DUP( temp, base, size ) ) 1881 goto Fail; 1882 psaux->t1_decrypt( temp, size, 4330 ); 1883 size -= (FT_ULong)t1face->type1.private_dict.lenIV; 1884 error = T1_Add_Table( table, 1885 (FT_Int)idx, 1886 temp + t1face->type1.private_dict.lenIV, 1887 size ); 1888 FT_FREE( temp ); 1889 } 1890 else 1891 error = T1_Add_Table( table, (FT_Int)idx, base, size ); 1892 if ( error ) 1893 goto Fail; 1894 } 1895 1896 if ( !loader->num_subrs ) 1897 loader->num_subrs = num_subrs; 1898 1899 #ifdef FT_DEBUG_LEVEL_TRACE 1900 FT_TRACE4(( " <" )); 1901 1902 /* XXX show subrs? */ 1903 FT_TRACE4(( "%d elements", num_subrs )); 1904 1905 FT_TRACE4(( ">\n" )); 1906 #endif 1907 1908 return; 1909 1910 Fail: 1911 parser->root.error = error; 1912 } 1913 1914 1915 #define TABLE_EXTEND 5 1916 1917 1918 static void 1919 parse_charstrings( FT_Face face, /* T1_Face */ 1920 void* loader_ ) 1921 { 1922 T1_Face t1face = (T1_Face)face; 1923 T1_Loader loader = (T1_Loader)loader_; 1924 T1_Parser parser = &loader->parser; 1925 PS_Table code_table = &loader->charstrings; 1926 PS_Table name_table = &loader->glyph_names; 1927 PS_Table swap_table = &loader->swap_table; 1928 FT_Memory memory = parser->root.memory; 1929 FT_Error error; 1930 1931 PSAux_Service psaux = (PSAux_Service)t1face->psaux; 1932 1933 FT_Byte* cur = parser->root.cursor; 1934 FT_Byte* limit = parser->root.limit; 1935 FT_Int n, num_glyphs; 1936 FT_Int notdef_index = 0; 1937 FT_Byte notdef_found = 0; 1938 1939 1940 num_glyphs = (FT_Int)T1_ToInt( parser ); 1941 if ( num_glyphs < 0 ) 1942 { 1943 error = FT_THROW( Invalid_File_Format ); 1944 goto Fail; 1945 } 1946 1947 /* we certainly need more than 8 bytes per glyph */ 1948 if ( num_glyphs > ( limit - cur ) >> 3 ) 1949 { 1950 FT_TRACE0(( "parse_charstrings: adjusting number of glyphs" 1951 " (from %d to %zu)\n", 1952 num_glyphs, ( limit - cur ) >> 3 )); 1953 num_glyphs = ( limit - cur ) >> 3; 1954 } 1955 1956 /* some fonts like Optima-Oblique not only define the /CharStrings */ 1957 /* array but access it also */ 1958 if ( num_glyphs == 0 || parser->root.error ) 1959 return; 1960 1961 /* initialize tables, leaving space for addition of .notdef, */ 1962 /* if necessary, and a few other glyphs to handle buggy */ 1963 /* fonts which have more glyphs than specified. */ 1964 1965 /* for some non-standard fonts like `Optima' which provides */ 1966 /* different outlines depending on the resolution it is */ 1967 /* possible to get here twice */ 1968 if ( !loader->num_glyphs ) 1969 { 1970 error = psaux->ps_table_funcs->init( 1971 code_table, num_glyphs + 1 + TABLE_EXTEND, memory ); 1972 if ( error ) 1973 goto Fail; 1974 1975 error = psaux->ps_table_funcs->init( 1976 name_table, num_glyphs + 1 + TABLE_EXTEND, memory ); 1977 if ( error ) 1978 goto Fail; 1979 1980 /* Initialize table for swapping index notdef_index and */ 1981 /* index 0 names and codes (if necessary). */ 1982 1983 error = psaux->ps_table_funcs->init( swap_table, 4, memory ); 1984 if ( error ) 1985 goto Fail; 1986 } 1987 1988 n = 0; 1989 1990 for (;;) 1991 { 1992 FT_ULong size; 1993 FT_Byte* base; 1994 1995 1996 /* the format is simple: */ 1997 /* `/glyphname' + binary data */ 1998 1999 T1_Skip_Spaces( parser ); 2000 2001 cur = parser->root.cursor; 2002 if ( cur >= limit ) 2003 break; 2004 2005 /* we stop when we find a `def' or `end' keyword */ 2006 if ( cur + 3 < limit && IS_PS_DELIM( cur[3] ) ) 2007 { 2008 if ( cur[0] == 'd' && 2009 cur[1] == 'e' && 2010 cur[2] == 'f' ) 2011 { 2012 /* There are fonts which have this: */ 2013 /* */ 2014 /* /CharStrings 118 dict def */ 2015 /* Private begin */ 2016 /* CharStrings begin */ 2017 /* ... */ 2018 /* */ 2019 /* To catch this we ignore `def' if */ 2020 /* no charstring has actually been */ 2021 /* seen. */ 2022 if ( n ) 2023 break; 2024 } 2025 2026 if ( cur[0] == 'e' && 2027 cur[1] == 'n' && 2028 cur[2] == 'd' ) 2029 break; 2030 } 2031 2032 T1_Skip_PS_Token( parser ); 2033 if ( parser->root.cursor >= limit ) 2034 { 2035 error = FT_THROW( Invalid_File_Format ); 2036 goto Fail; 2037 } 2038 if ( parser->root.error ) 2039 return; 2040 2041 if ( *cur == '/' ) 2042 { 2043 FT_UInt len; 2044 2045 2046 if ( cur + 2 >= limit ) 2047 { 2048 error = FT_THROW( Invalid_File_Format ); 2049 goto Fail; 2050 } 2051 2052 cur++; /* skip `/' */ 2053 len = (FT_UInt)( parser->root.cursor - cur ); 2054 2055 if ( !read_binary_data( parser, &size, &base, IS_INCREMENTAL ) ) 2056 return; 2057 2058 /* for some non-standard fonts like `Optima' which provides */ 2059 /* different outlines depending on the resolution it is */ 2060 /* possible to get here twice */ 2061 if ( loader->num_glyphs ) 2062 continue; 2063 2064 error = T1_Add_Table( name_table, n, cur, len + 1 ); 2065 if ( error ) 2066 goto Fail; 2067 2068 /* add a trailing zero to the name table */ 2069 name_table->elements[n][len] = '\0'; 2070 2071 /* record index of /.notdef */ 2072 if ( *cur == '.' && 2073 ft_strcmp( ".notdef", 2074 (const char*)( name_table->elements[n] ) ) == 0 ) 2075 { 2076 notdef_index = n; 2077 notdef_found = 1; 2078 } 2079 2080 if ( t1face->type1.private_dict.lenIV >= 0 && 2081 n < num_glyphs + TABLE_EXTEND ) 2082 { 2083 FT_Byte* temp = NULL; 2084 2085 2086 if ( size <= (FT_ULong)t1face->type1.private_dict.lenIV ) 2087 { 2088 error = FT_THROW( Invalid_File_Format ); 2089 goto Fail; 2090 } 2091 2092 /* t1_decrypt() shouldn't write to base -- make temporary copy */ 2093 if ( FT_DUP( temp, base, size ) ) 2094 goto Fail; 2095 psaux->t1_decrypt( temp, size, 4330 ); 2096 size -= (FT_ULong)t1face->type1.private_dict.lenIV; 2097 error = T1_Add_Table( code_table, 2098 n, 2099 temp + t1face->type1.private_dict.lenIV, 2100 size ); 2101 FT_FREE( temp ); 2102 } 2103 else 2104 error = T1_Add_Table( code_table, n, base, size ); 2105 if ( error ) 2106 goto Fail; 2107 2108 n++; 2109 } 2110 } 2111 2112 if ( !n ) 2113 { 2114 error = FT_THROW( Invalid_File_Format ); 2115 goto Fail; 2116 } 2117 2118 loader->num_glyphs = n; 2119 2120 /* if /.notdef is found but does not occupy index 0, do our magic. */ 2121 if ( notdef_found && 2122 ft_strcmp( ".notdef", (const char*)name_table->elements[0] ) ) 2123 { 2124 /* Swap glyph in index 0 with /.notdef glyph. First, add index 0 */ 2125 /* name and code entries to swap_table. Then place notdef_index */ 2126 /* name and code entries into swap_table. Then swap name and code */ 2127 /* entries at indices notdef_index and 0 using values stored in */ 2128 /* swap_table. */ 2129 2130 /* Index 0 name */ 2131 error = T1_Add_Table( swap_table, 0, 2132 name_table->elements[0], 2133 name_table->lengths [0] ); 2134 if ( error ) 2135 goto Fail; 2136 2137 /* Index 0 code */ 2138 error = T1_Add_Table( swap_table, 1, 2139 code_table->elements[0], 2140 code_table->lengths [0] ); 2141 if ( error ) 2142 goto Fail; 2143 2144 /* Index notdef_index name */ 2145 error = T1_Add_Table( swap_table, 2, 2146 name_table->elements[notdef_index], 2147 name_table->lengths [notdef_index] ); 2148 if ( error ) 2149 goto Fail; 2150 2151 /* Index notdef_index code */ 2152 error = T1_Add_Table( swap_table, 3, 2153 code_table->elements[notdef_index], 2154 code_table->lengths [notdef_index] ); 2155 if ( error ) 2156 goto Fail; 2157 2158 error = T1_Add_Table( name_table, notdef_index, 2159 swap_table->elements[0], 2160 swap_table->lengths [0] ); 2161 if ( error ) 2162 goto Fail; 2163 2164 error = T1_Add_Table( code_table, notdef_index, 2165 swap_table->elements[1], 2166 swap_table->lengths [1] ); 2167 if ( error ) 2168 goto Fail; 2169 2170 error = T1_Add_Table( name_table, 0, 2171 swap_table->elements[2], 2172 swap_table->lengths [2] ); 2173 if ( error ) 2174 goto Fail; 2175 2176 error = T1_Add_Table( code_table, 0, 2177 swap_table->elements[3], 2178 swap_table->lengths [3] ); 2179 if ( error ) 2180 goto Fail; 2181 2182 } 2183 else if ( !notdef_found ) 2184 { 2185 /* notdef_index is already 0, or /.notdef is undefined in */ 2186 /* charstrings dictionary. Worry about /.notdef undefined. */ 2187 /* We take index 0 and add it to the end of the table(s) */ 2188 /* and add our own /.notdef glyph to index 0. */ 2189 2190 /* 0 333 hsbw endchar */ 2191 FT_Byte notdef_glyph[] = { 0x8B, 0xF7, 0xE1, 0x0D, 0x0E }; 2192 2193 2194 error = T1_Add_Table( swap_table, 0, 2195 name_table->elements[0], 2196 name_table->lengths [0] ); 2197 if ( error ) 2198 goto Fail; 2199 2200 error = T1_Add_Table( swap_table, 1, 2201 code_table->elements[0], 2202 code_table->lengths [0] ); 2203 if ( error ) 2204 goto Fail; 2205 2206 error = T1_Add_Table( name_table, 0, ".notdef", 8 ); 2207 if ( error ) 2208 goto Fail; 2209 2210 error = T1_Add_Table( code_table, 0, notdef_glyph, 5 ); 2211 2212 if ( error ) 2213 goto Fail; 2214 2215 error = T1_Add_Table( name_table, n, 2216 swap_table->elements[0], 2217 swap_table->lengths [0] ); 2218 if ( error ) 2219 goto Fail; 2220 2221 error = T1_Add_Table( code_table, n, 2222 swap_table->elements[1], 2223 swap_table->lengths [1] ); 2224 if ( error ) 2225 goto Fail; 2226 2227 /* we added a glyph. */ 2228 loader->num_glyphs += 1; 2229 } 2230 2231 #ifdef FT_DEBUG_LEVEL_TRACE 2232 FT_TRACE4(( " <" )); 2233 2234 /* XXX show charstrings? */ 2235 FT_TRACE4(( "%d elements", loader->num_glyphs )); 2236 2237 FT_TRACE4(( ">\n" )); 2238 #endif 2239 2240 return; 2241 2242 Fail: 2243 parser->root.error = error; 2244 } 2245 2246 2247 /************************************************************************** 2248 * 2249 * Define the token field static variables. This is a set of 2250 * T1_FieldRec variables. 2251 * 2252 */ 2253 2254 2255 static 2256 const T1_FieldRec t1_keywords[] = 2257 { 2258 2259 #include "t1tokens.h" 2260 2261 /* now add the special functions... */ 2262 T1_FIELD_CALLBACK( "FontMatrix", t1_parse_font_matrix, 2263 T1_FIELD_DICT_FONTDICT ) 2264 T1_FIELD_CALLBACK( "Encoding", parse_encoding, 2265 T1_FIELD_DICT_FONTDICT ) 2266 T1_FIELD_CALLBACK( "Subrs", parse_subrs, 2267 T1_FIELD_DICT_PRIVATE ) 2268 T1_FIELD_CALLBACK( "CharStrings", parse_charstrings, 2269 T1_FIELD_DICT_PRIVATE ) 2270 T1_FIELD_CALLBACK( "Private", parse_private, 2271 T1_FIELD_DICT_FONTDICT ) 2272 2273 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 2274 T1_FIELD_CALLBACK( "BlendDesignPositions", parse_blend_design_positions, 2275 T1_FIELD_DICT_FONTDICT ) 2276 T1_FIELD_CALLBACK( "BlendDesignMap", parse_blend_design_map, 2277 T1_FIELD_DICT_FONTDICT ) 2278 T1_FIELD_CALLBACK( "BlendAxisTypes", parse_blend_axis_types, 2279 T1_FIELD_DICT_FONTDICT ) 2280 T1_FIELD_CALLBACK( "WeightVector", parse_weight_vector, 2281 T1_FIELD_DICT_FONTDICT ) 2282 T1_FIELD_CALLBACK( "BuildCharArray", parse_buildchar, 2283 T1_FIELD_DICT_PRIVATE ) 2284 #endif 2285 2286 T1_FIELD_ZERO 2287 }; 2288 2289 2290 static FT_Error 2291 parse_dict( T1_Face face, 2292 T1_Loader loader, 2293 FT_Byte* base, 2294 FT_ULong size ) 2295 { 2296 T1_Parser parser = &loader->parser; 2297 FT_Byte *limit, *start_binary = NULL; 2298 FT_Bool have_integer = 0; 2299 2300 2301 parser->root.cursor = base; 2302 parser->root.limit = base + size; 2303 parser->root.error = FT_Err_Ok; 2304 2305 limit = parser->root.limit; 2306 2307 T1_Skip_Spaces( parser ); 2308 2309 while ( parser->root.cursor < limit ) 2310 { 2311 FT_Byte* cur; 2312 2313 2314 cur = parser->root.cursor; 2315 2316 /* look for `eexec' */ 2317 if ( IS_PS_TOKEN( cur, limit, "eexec" ) ) 2318 break; 2319 2320 /* look for `closefile' which ends the eexec section */ 2321 else if ( IS_PS_TOKEN( cur, limit, "closefile" ) ) 2322 break; 2323 2324 /* in a synthetic font the base font starts after a */ 2325 /* `FontDictionary' token that is placed after a Private dict */ 2326 else if ( IS_PS_TOKEN( cur, limit, "FontDirectory" ) ) 2327 { 2328 if ( loader->keywords_encountered & T1_PRIVATE ) 2329 loader->keywords_encountered |= 2330 T1_FONTDIR_AFTER_PRIVATE; 2331 parser->root.cursor += 13; 2332 } 2333 2334 /* check whether we have an integer */ 2335 else if ( ft_isdigit( *cur ) ) 2336 { 2337 start_binary = cur; 2338 T1_Skip_PS_Token( parser ); 2339 if ( parser->root.error ) 2340 goto Exit; 2341 have_integer = 1; 2342 } 2343 2344 /* in valid Type 1 fonts we don't see `RD' or `-|' directly */ 2345 /* since those tokens are handled by parse_subrs and */ 2346 /* parse_charstrings */ 2347 else if ( *cur == 'R' && cur + 6 < limit && *( cur + 1 ) == 'D' && 2348 have_integer ) 2349 { 2350 FT_ULong s; 2351 FT_Byte* b; 2352 2353 2354 parser->root.cursor = start_binary; 2355 if ( !read_binary_data( parser, &s, &b, IS_INCREMENTAL ) ) 2356 return FT_THROW( Invalid_File_Format ); 2357 have_integer = 0; 2358 } 2359 2360 else if ( *cur == '-' && cur + 6 < limit && *( cur + 1 ) == '|' && 2361 have_integer ) 2362 { 2363 FT_ULong s; 2364 FT_Byte* b; 2365 2366 2367 parser->root.cursor = start_binary; 2368 if ( !read_binary_data( parser, &s, &b, IS_INCREMENTAL ) ) 2369 return FT_THROW( Invalid_File_Format ); 2370 have_integer = 0; 2371 } 2372 2373 /* look for immediates */ 2374 else if ( *cur == '/' && cur + 2 < limit ) 2375 { 2376 FT_UInt len; 2377 2378 2379 cur++; 2380 2381 parser->root.cursor = cur; 2382 T1_Skip_PS_Token( parser ); 2383 if ( parser->root.error ) 2384 goto Exit; 2385 2386 len = (FT_UInt)( parser->root.cursor - cur ); 2387 2388 if ( len > 0 && len < 22 && parser->root.cursor < limit ) 2389 { 2390 /* now compare the immediate name to the keyword table */ 2391 T1_Field keyword = (T1_Field)t1_keywords; 2392 2393 2394 while ( keyword->len ) 2395 { 2396 FT_Byte* name = (FT_Byte*)keyword->ident; 2397 2398 2399 if ( keyword->len == len && 2400 ft_memcmp( cur, name, len ) == 0 ) 2401 { 2402 /* We found it -- run the parsing callback! */ 2403 /* We record every instance of every field */ 2404 /* (until we reach the base font of a */ 2405 /* synthetic font) to deal adequately with */ 2406 /* multiple master fonts; this is also */ 2407 /* necessary because later PostScript */ 2408 /* definitions override earlier ones. */ 2409 2410 /* Once we encounter `FontDirectory' after */ 2411 /* `/Private', we know that this is a synthetic */ 2412 /* font; except for `/CharStrings' we are not */ 2413 /* interested in anything that follows this */ 2414 /* `FontDirectory'. */ 2415 2416 /* MM fonts have more than one /Private token at */ 2417 /* the top level; let's hope that all the junk */ 2418 /* that follows the first /Private token is not */ 2419 /* interesting to us. */ 2420 2421 /* According to Adobe Tech Note #5175 (CID-Keyed */ 2422 /* Font Installation for ATM Software) a `begin' */ 2423 /* must be followed by exactly one `end', and */ 2424 /* `begin' -- `end' pairs must be accurately */ 2425 /* paired. We could use this to distinguish */ 2426 /* between the global Private and the Private */ 2427 /* dict that is a member of the Blend dict. */ 2428 2429 const FT_UInt dict = 2430 ( loader->keywords_encountered & T1_PRIVATE ) 2431 ? T1_FIELD_DICT_PRIVATE 2432 : T1_FIELD_DICT_FONTDICT; 2433 2434 2435 if ( !( dict & keyword->dict ) ) 2436 { 2437 FT_TRACE1(( "parse_dict: found `%s' but ignoring it" 2438 " since it is in the wrong dictionary\n", 2439 keyword->ident )); 2440 break; 2441 } 2442 2443 if ( !( loader->keywords_encountered & 2444 T1_FONTDIR_AFTER_PRIVATE ) || 2445 ft_strcmp( (const char*)name, "CharStrings" ) == 0 ) 2446 { 2447 parser->root.error = t1_load_keyword( face, 2448 loader, 2449 keyword ); 2450 if ( parser->root.error ) 2451 { 2452 if ( FT_ERR_EQ( parser->root.error, Ignore ) ) 2453 parser->root.error = FT_Err_Ok; 2454 else 2455 return parser->root.error; 2456 } 2457 } 2458 break; 2459 } 2460 2461 keyword++; 2462 } 2463 } 2464 2465 have_integer = 0; 2466 } 2467 else 2468 { 2469 T1_Skip_PS_Token( parser ); 2470 if ( parser->root.error ) 2471 goto Exit; 2472 have_integer = 0; 2473 } 2474 2475 T1_Skip_Spaces( parser ); 2476 } 2477 2478 Exit: 2479 return parser->root.error; 2480 } 2481 2482 2483 static void 2484 t1_init_loader( T1_Loader loader, 2485 T1_Face face ) 2486 { 2487 FT_UNUSED( face ); 2488 2489 FT_ZERO( loader ); 2490 } 2491 2492 2493 static void 2494 t1_done_loader( T1_Loader loader ) 2495 { 2496 T1_Parser parser = &loader->parser; 2497 FT_Memory memory = parser->root.memory; 2498 2499 2500 /* finalize tables */ 2501 T1_Release_Table( &loader->encoding_table ); 2502 T1_Release_Table( &loader->charstrings ); 2503 T1_Release_Table( &loader->glyph_names ); 2504 T1_Release_Table( &loader->swap_table ); 2505 T1_Release_Table( &loader->subrs ); 2506 2507 /* finalize hash */ 2508 ft_hash_num_free( loader->subrs_hash, memory ); 2509 FT_FREE( loader->subrs_hash ); 2510 2511 /* finalize parser */ 2512 T1_Finalize_Parser( parser ); 2513 } 2514 2515 2516 FT_LOCAL_DEF( FT_Error ) 2517 T1_Open_Face( T1_Face face ) 2518 { 2519 T1_LoaderRec loader; 2520 T1_Parser parser; 2521 T1_Font type1 = &face->type1; 2522 PS_Private priv = &type1->private_dict; 2523 FT_Error error; 2524 2525 PSAux_Service psaux = (PSAux_Service)face->psaux; 2526 2527 2528 t1_init_loader( &loader, face ); 2529 2530 /* default values */ 2531 face->ndv_idx = -1; 2532 face->cdv_idx = -1; 2533 face->len_buildchar = 0; 2534 2535 priv->blue_shift = 7; 2536 priv->blue_fuzz = 1; 2537 priv->lenIV = 4; 2538 priv->expansion_factor = (FT_Fixed)( 0.06 * 0x10000L ); 2539 priv->blue_scale = (FT_Fixed)( 0.039625 * 0x10000L * 1000 ); 2540 2541 parser = &loader.parser; 2542 error = T1_New_Parser( parser, 2543 face->root.stream, 2544 face->root.memory, 2545 psaux ); 2546 if ( error ) 2547 goto Exit; 2548 2549 FT_TRACE4(( " top dictionary:\n" )); 2550 error = parse_dict( face, &loader, 2551 parser->base_dict, parser->base_len ); 2552 if ( error ) 2553 goto Exit; 2554 2555 error = T1_Get_Private_Dict( parser, psaux ); 2556 if ( error ) 2557 goto Exit; 2558 2559 FT_TRACE4(( " private dictionary:\n" )); 2560 error = parse_dict( face, &loader, 2561 parser->private_dict, parser->private_len ); 2562 if ( error ) 2563 goto Exit; 2564 2565 /* ensure even-ness of `num_blue_values' */ 2566 priv->num_blue_values &= ~1; 2567 2568 #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT 2569 2570 /* we don't support Multiple Master fonts with intermediate designs; */ 2571 /* this implies that `num_designs' must be equal to `2^^num_axis' */ 2572 if ( face->blend && 2573 face->blend->num_designs != ( 1U << face->blend->num_axis ) ) 2574 { 2575 FT_ERROR(( "T1_Open_Face:" 2576 " number-of-designs != 2 ^^ number-of-axes\n" )); 2577 T1_Done_Blend( FT_FACE( face ) ); 2578 } 2579 2580 if ( face->blend && 2581 face->blend->num_default_design_vector != 0 && 2582 face->blend->num_default_design_vector != face->blend->num_axis ) 2583 { 2584 /* we don't use it currently so just warn, reset, and ignore */ 2585 FT_ERROR(( "T1_Open_Face(): /DesignVector contains %u entries " 2586 "while there are %u axes.\n", 2587 face->blend->num_default_design_vector, 2588 face->blend->num_axis )); 2589 2590 face->blend->num_default_design_vector = 0; 2591 } 2592 2593 /* the following can happen for MM instances; we then treat the */ 2594 /* font as a normal PS font */ 2595 if ( face->blend && 2596 ( !face->blend->num_designs || !face->blend->num_axis ) ) 2597 T1_Done_Blend( FT_FACE( face ) ); 2598 2599 /* the font may have no valid WeightVector */ 2600 if ( face->blend && !face->blend->weight_vector ) 2601 T1_Done_Blend( FT_FACE( face ) ); 2602 2603 /* the font may have no valid BlendDesignPositions */ 2604 if ( face->blend && !face->blend->design_pos[0] ) 2605 T1_Done_Blend( FT_FACE( face ) ); 2606 2607 /* the font may have no valid BlendDesignMap */ 2608 if ( face->blend ) 2609 { 2610 FT_UInt i; 2611 2612 2613 for ( i = 0; i < face->blend->num_axis; i++ ) 2614 if ( !face->blend->design_map[i].num_points ) 2615 { 2616 T1_Done_Blend( FT_FACE( face ) ); 2617 break; 2618 } 2619 } 2620 2621 if ( face->blend ) 2622 { 2623 if ( face->len_buildchar > 0 ) 2624 { 2625 FT_Memory memory = face->root.memory; 2626 2627 2628 if ( FT_NEW_ARRAY( face->buildchar, face->len_buildchar ) ) 2629 { 2630 FT_ERROR(( "T1_Open_Face: cannot allocate BuildCharArray\n" )); 2631 face->len_buildchar = 0; 2632 goto Exit; 2633 } 2634 } 2635 } 2636 else 2637 face->len_buildchar = 0; 2638 2639 #endif /* !T1_CONFIG_OPTION_NO_MM_SUPPORT */ 2640 2641 /* now, propagate the subrs, charstrings, and glyphnames tables */ 2642 /* to the Type1 data */ 2643 type1->num_glyphs = loader.num_glyphs; 2644 2645 if ( loader.subrs.init ) 2646 { 2647 type1->num_subrs = loader.num_subrs; 2648 type1->subrs_block = loader.subrs.block; 2649 type1->subrs = loader.subrs.elements; 2650 type1->subrs_len = loader.subrs.lengths; 2651 type1->subrs_hash = loader.subrs_hash; 2652 2653 /* prevent `t1_done_loader' from freeing the propagated data */ 2654 loader.subrs.init = 0; 2655 loader.subrs_hash = NULL; 2656 } 2657 2658 if ( !IS_INCREMENTAL ) 2659 if ( !loader.charstrings.init ) 2660 { 2661 FT_ERROR(( "T1_Open_Face: no `/CharStrings' array in face\n" )); 2662 error = FT_THROW( Invalid_File_Format ); 2663 } 2664 2665 loader.charstrings.init = 0; 2666 type1->charstrings_block = loader.charstrings.block; 2667 type1->charstrings = loader.charstrings.elements; 2668 type1->charstrings_len = loader.charstrings.lengths; 2669 2670 /* we copy the glyph names `block' and `elements' fields; */ 2671 /* the `lengths' field must be released later */ 2672 type1->glyph_names_block = loader.glyph_names.block; 2673 type1->glyph_names = (FT_String**)loader.glyph_names.elements; 2674 loader.glyph_names.block = NULL; 2675 loader.glyph_names.elements = NULL; 2676 2677 /* we must now build type1.encoding when we have a custom array */ 2678 if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY ) 2679 { 2680 FT_Int charcode, idx, min_char, max_char; 2681 2682 2683 /* OK, we do the following: for each element in the encoding */ 2684 /* table, look up the index of the glyph having the same name */ 2685 /* the index is then stored in type1.encoding.char_index, and */ 2686 /* the name to type1.encoding.char_name */ 2687 2688 min_char = 0; 2689 max_char = 0; 2690 2691 charcode = 0; 2692 for ( ; charcode < loader.encoding_table.max_elems; charcode++ ) 2693 { 2694 const FT_String* char_name = 2695 (const FT_String*)loader.encoding_table.elements[charcode]; 2696 2697 2698 type1->encoding.char_index[charcode] = 0; 2699 type1->encoding.char_name [charcode] = ".notdef"; 2700 2701 if ( char_name ) 2702 for ( idx = 0; idx < type1->num_glyphs; idx++ ) 2703 { 2704 const FT_String* glyph_name = type1->glyph_names[idx]; 2705 2706 2707 if ( ft_strcmp( char_name, glyph_name ) == 0 ) 2708 { 2709 type1->encoding.char_index[charcode] = (FT_UShort)idx; 2710 type1->encoding.char_name [charcode] = glyph_name; 2711 2712 /* Change min/max encoded char only if glyph name is */ 2713 /* not /.notdef */ 2714 if ( ft_strcmp( ".notdef", glyph_name ) != 0 ) 2715 { 2716 if ( charcode < min_char ) 2717 min_char = charcode; 2718 if ( charcode >= max_char ) 2719 max_char = charcode + 1; 2720 } 2721 break; 2722 } 2723 } 2724 } 2725 2726 type1->encoding.code_first = min_char; 2727 type1->encoding.code_last = max_char; 2728 type1->encoding.num_chars = loader.num_chars; 2729 } 2730 2731 /* some sanitizing to avoid overflows later on; */ 2732 /* the upper limits are ad-hoc values */ 2733 if ( priv->blue_shift > 1000 || priv->blue_shift < 0 ) 2734 { 2735 FT_TRACE2(( "T1_Open_Face:" 2736 " setting unlikely BlueShift value %d to default (7)\n", 2737 priv->blue_shift )); 2738 priv->blue_shift = 7; 2739 } 2740 2741 if ( priv->blue_fuzz > 1000 || priv->blue_fuzz < 0 ) 2742 { 2743 FT_TRACE2(( "T1_Open_Face:" 2744 " setting unlikely BlueFuzz value %d to default (1)\n", 2745 priv->blue_fuzz )); 2746 priv->blue_fuzz = 1; 2747 } 2748 2749 Exit: 2750 t1_done_loader( &loader ); 2751 return error; 2752 } 2753 2754 2755 /* END */