| 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* t2load.c */ |
| 4 | /* */ |
| 5 | /* TrueType glyph data/program tables loader (body). */ |
| 6 | /* */ |
| 7 | /* Copyright 1996-2000 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 <freetype/internal/ftdebug.h> |
| 20 | #include <freetype/internal/ftobjs.h> |
| 21 | #include <freetype/internal/ftstream.h> |
| 22 | #include <freetype/internal/psnames.h> |
| 23 | |
| 24 | #include <freetype/internal/t2errors.h> |
| 25 | #include <freetype/tttags.h> |
| 26 | |
| 27 | |
| 28 | #ifdef FT_FLAT_COMPILE |
| 29 | |
| 30 | #include "t2load.h" |
| 31 | #include "t2parse.h" |
| 32 | |
| 33 | #else |
| 34 | |
| 35 | #include <cff/t2load.h> |
| 36 | #include <cff/t2parse.h> |
| 37 | |
| 38 | #endif |
| 39 | |
| 40 | |
| 41 | /*************************************************************************/ |
| 42 | /* */ |
| 43 | /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| 44 | /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| 45 | /* messages during execution. */ |
| 46 | /* */ |
| 47 | #undef FT_COMPONENT |
| 48 | #define FT_COMPONENT trace_t2load |
| 49 | |
| 50 | |
| 51 | /* read a CFF offset from memory */ |
| 52 | static |
| 53 | FT_ULong t2_get_offset( FT_Byte* p, |
| 54 | FT_Byte off_size ) |
| 55 | { |
| 56 | FT_ULong result; |
| 57 | |
| 58 | |
| 59 | for ( result = 0; off_size > 0; off_size-- ) |
| 60 | { |
| 61 | result <<= 8; |
| 62 | result |= *p++; |
| 63 | } |
| 64 | |
| 65 | return result; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | static |
| 70 | FT_Error t2_new_cff_index( CFF_Index* index, |
| 71 | FT_Stream stream, |
| 72 | FT_Bool load ) |
| 73 | { |
| 74 | FT_Error error; |
| 75 | FT_Memory memory = stream->memory; |
| 76 | FT_UShort count; |
| 77 | |
| 78 | |
| 79 | MEM_Set( index, 0, sizeof ( *index ) ); |
| 80 | |
| 81 | index->stream = stream; |
| 82 | if ( !READ_UShort( count ) && |
| 83 | count > 0 ) |
| 84 | { |
| 85 | FT_Byte* p; |
| 86 | FT_Byte offsize; |
| 87 | FT_ULong data_size; |
| 88 | FT_ULong* poff; |
| 89 | |
| 90 | |
| 91 | /* there is at least one element; read the offset size, */ |
| 92 | /* then access the offset table to compute the index's total size */ |
| 93 | if ( READ_Byte( offsize ) ) |
| 94 | goto Exit; |
| 95 | |
| 96 | index->stream = stream; |
| 97 | index->count = count; |
| 98 | index->off_size = offsize; |
| 99 | data_size = (FT_ULong)( count + 1 ) * offsize; |
| 100 | |
| 101 | if ( ALLOC_ARRAY( index->offsets, count + 1, FT_ULong ) || |
| 102 | ACCESS_Frame( data_size ) ) |
| 103 | goto Exit; |
| 104 | |
| 105 | poff = index->offsets; |
| 106 | p = (FT_Byte*)stream->cursor; |
| 107 | |
| 108 | for ( ; (FT_Short)count >= 0; count-- ) |
| 109 | { |
| 110 | poff[0] = t2_get_offset( p, offsize ); |
| 111 | poff++; |
| 112 | p += offsize; |
| 113 | } |
| 114 | |
| 115 | FORGET_Frame(); |
| 116 | |
| 117 | index->data_offset = FILE_Pos(); |
| 118 | data_size = poff[-1] - 1; |
| 119 | |
| 120 | if ( load ) |
| 121 | { |
| 122 | /* load the data */ |
| 123 | if ( EXTRACT_Frame( data_size, index->bytes ) ) |
| 124 | goto Exit; |
| 125 | } |
| 126 | else |
| 127 | { |
| 128 | /* skip the data */ |
| 129 | (void)FILE_Skip( data_size ); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | Exit: |
| 134 | if ( error ) |
| 135 | FREE( index->offsets ); |
| 136 | |
| 137 | return error; |
| 138 | } |
| 139 | |
| 140 | |
| 141 | static |
| 142 | void t2_done_cff_index( CFF_Index* index ) |
| 143 | { |
| 144 | if ( index->stream ) |
| 145 | { |
| 146 | FT_Stream stream = index->stream; |
| 147 | FT_Memory memory = stream->memory; |
| 148 | |
| 149 | |
| 150 | if ( index->bytes ) |
| 151 | RELEASE_Frame( index->bytes ); |
| 152 | |
| 153 | FREE( index->offsets ); |
| 154 | MEM_Set( index, 0, sizeof ( *index ) ); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | |
| 159 | static |
| 160 | FT_Error t2_explicit_cff_index( CFF_Index* index, |
| 161 | FT_Byte*** table ) |
| 162 | { |
| 163 | FT_Error error = 0; |
| 164 | FT_Memory memory = index->stream->memory; |
| 165 | FT_UInt n, offset, old_offset; |
| 166 | FT_Byte** t; |
| 167 | |
| 168 | |
| 169 | *table = 0; |
| 170 | |
| 171 | if ( index->count > 0 && !ALLOC_ARRAY( t, index->count + 1, FT_Byte* ) ) |
| 172 | { |
| 173 | old_offset = 1; |
| 174 | for ( n = 0; n <= index->count; n++ ) |
| 175 | { |
| 176 | offset = index->offsets[n]; |
| 177 | if ( !offset ) |
| 178 | offset = old_offset; |
| 179 | |
| 180 | t[n] = index->bytes + offset - 1; |
| 181 | |
| 182 | old_offset = offset; |
| 183 | } |
| 184 | *table = t; |
| 185 | } |
| 186 | |
| 187 | return error; |
| 188 | } |
| 189 | |
| 190 | |
| 191 | LOCAL_FUNC |
| 192 | FT_Error T2_Access_Element( CFF_Index* index, |
| 193 | FT_UInt element, |
| 194 | FT_Byte** pbytes, |
| 195 | FT_ULong* pbyte_len ) |
| 196 | { |
| 197 | FT_Error error = 0; |
| 198 | |
| 199 | |
| 200 | if ( index && index->count > element ) |
| 201 | { |
| 202 | /* compute start and end offsets */ |
| 203 | FT_ULong off1, off2; |
| 204 | |
| 205 | |
| 206 | off1 = index->offsets[element]; |
| 207 | if ( off1 ) |
| 208 | { |
| 209 | do |
| 210 | { |
| 211 | element++; |
| 212 | off2 = index->offsets[element]; |
| 213 | |
| 214 | } while ( off2 == 0 && element < index->count ); |
| 215 | |
| 216 | if ( !off2 ) |
| 217 | off1 = 0; |
| 218 | } |
| 219 | |
| 220 | /* access element */ |
| 221 | if ( off1 ) |
| 222 | { |
| 223 | *pbyte_len = off2 - off1; |
| 224 | |
| 225 | if ( index->bytes ) |
| 226 | { |
| 227 | /* this index was completely loaded in memory, that's easy */ |
| 228 | *pbytes = index->bytes + off1 - 1; |
| 229 | } |
| 230 | else |
| 231 | { |
| 232 | /* this index is still on disk/file, access it through a frame */ |
| 233 | FT_Stream stream = index->stream; |
| 234 | |
| 235 | |
| 236 | if ( FILE_Seek( index->data_offset + off1 - 1 ) || |
| 237 | EXTRACT_Frame( off2 - off1, *pbytes ) ) |
| 238 | goto Exit; |
| 239 | } |
| 240 | } |
| 241 | else |
| 242 | { |
| 243 | /* empty index element */ |
| 244 | *pbytes = 0; |
| 245 | *pbyte_len = 0; |
| 246 | } |
| 247 | } |
| 248 | else |
| 249 | error = T2_Err_Invalid_Argument; |
| 250 | |
| 251 | Exit: |
| 252 | return error; |
| 253 | } |
| 254 | |
| 255 | |
| 256 | LOCAL_FUNC |
| 257 | void T2_Forget_Element( CFF_Index* index, |
| 258 | FT_Byte** pbytes ) |
| 259 | { |
| 260 | if ( index->bytes == 0 ) |
| 261 | { |
| 262 | FT_Stream stream = index->stream; |
| 263 | |
| 264 | |
| 265 | RELEASE_Frame( *pbytes ); |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | |
| 270 | LOCAL_FUNC |
| 271 | FT_String* T2_Get_Name( CFF_Index* index, |
| 272 | FT_UInt element ) |
| 273 | { |
| 274 | FT_Memory memory = index->stream->memory; |
| 275 | FT_Byte* bytes; |
| 276 | FT_ULong byte_len; |
| 277 | FT_Error error; |
| 278 | FT_String* name = 0; |
| 279 | |
| 280 | |
| 281 | error = T2_Access_Element( index, element, &bytes, &byte_len ); |
| 282 | if ( error ) |
| 283 | goto Exit; |
| 284 | |
| 285 | if ( !ALLOC( name, byte_len + 1 ) ) |
| 286 | { |
| 287 | MEM_Copy( name, bytes, byte_len ); |
| 288 | name[byte_len] = 0; |
| 289 | } |
| 290 | T2_Forget_Element( index, &bytes ); |
| 291 | |
| 292 | Exit: |
| 293 | return name; |
| 294 | } |
| 295 | |
| 296 | |
| 297 | LOCAL_FUNC |
| 298 | FT_String* T2_Get_String( CFF_Index* index, |
| 299 | FT_UInt sid, |
| 300 | PSNames_Interface* interface ) |
| 301 | { |
| 302 | /* if it is not a standard string, return it */ |
| 303 | if ( sid > 390 ) |
| 304 | return T2_Get_Name( index, sid - 390 ); |
| 305 | |
| 306 | /* that's a standard string, fetch a copy from the PSName module */ |
| 307 | { |
| 308 | FT_String* name = 0; |
| 309 | const char* adobe_name = interface->adobe_std_strings( sid ); |
| 310 | FT_UInt len; |
| 311 | |
| 312 | |
| 313 | if ( adobe_name ) |
| 314 | { |
| 315 | FT_Memory memory = index->stream->memory; |
| 316 | FT_Error error; |
| 317 | |
| 318 | |
| 319 | len = (FT_UInt)strlen( adobe_name ); |
| 320 | if ( !ALLOC( name, len + 1 ) ) |
| 321 | { |
| 322 | MEM_Copy( name, adobe_name, len ); |
| 323 | name[len] = 0; |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | return name; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | |
| 332 | /*************************************************************************/ |
| 333 | /*************************************************************************/ |
| 334 | /*** ***/ |
| 335 | /*** FD Select table support ***/ |
| 336 | /*** ***/ |
| 337 | /*************************************************************************/ |
| 338 | /*************************************************************************/ |
| 339 | |
| 340 | |
| 341 | static |
| 342 | void CFF_Done_FD_Select( CFF_FD_Select* select, |
| 343 | FT_Stream stream ) |
| 344 | { |
| 345 | if ( select->data ) |
| 346 | RELEASE_Frame( select->data ); |
| 347 | |
| 348 | select->data_size = 0; |
| 349 | select->format = 0; |
| 350 | select->range_count = 0; |
| 351 | } |
| 352 | |
| 353 | |
| 354 | static |
| 355 | FT_Error CFF_Load_FD_Select( CFF_FD_Select* select, |
| 356 | FT_UInt num_glyphs, |
| 357 | FT_Stream stream, |
| 358 | FT_ULong offset ) |
| 359 | { |
| 360 | FT_Error error; |
| 361 | FT_Byte format; |
| 362 | FT_UInt num_ranges; |
| 363 | |
| 364 | |
| 365 | /* read format */ |
| 366 | if ( FILE_Seek( offset ) || READ_Byte( format ) ) |
| 367 | goto Exit; |
| 368 | |
| 369 | select->format = format; |
| 370 | select->cache_count = 0; /* clear cache */ |
| 371 | |
| 372 | switch ( format ) |
| 373 | { |
| 374 | case 0: /* format 0, that's simple */ |
| 375 | select->data_size = num_glyphs; |
| 376 | goto Load_Data; |
| 377 | |
| 378 | case 3: /* format 3, a tad more complex */ |
| 379 | if ( READ_UShort( num_ranges ) ) |
| 380 | goto Exit; |
| 381 | |
| 382 | select->data_size = num_ranges * 3 + 2; |
| 383 | |
| 384 | Load_Data: |
| 385 | if ( EXTRACT_Frame( select->data_size, select->data ) ) |
| 386 | goto Exit; |
| 387 | break; |
| 388 | |
| 389 | default: /* hmm... that's wrong */ |
| 390 | error = T2_Err_Invalid_File_Format; |
| 391 | } |
| 392 | |
| 393 | Exit: |
| 394 | return error; |
| 395 | } |
| 396 | |
| 397 | |
| 398 | LOCAL_FUNC |
| 399 | FT_Byte CFF_Get_FD( CFF_FD_Select* select, |
| 400 | FT_UInt glyph_index ) |
| 401 | { |
| 402 | FT_Byte fd = 0; |
| 403 | |
| 404 | |
| 405 | switch ( select->format ) |
| 406 | { |
| 407 | case 0: |
| 408 | fd = select->data[glyph_index]; |
| 409 | break; |
| 410 | |
| 411 | case 3: |
| 412 | /* first, compare to cache */ |
| 413 | if ( (FT_UInt)(glyph_index-select->cache_first) < select->cache_count ) |
| 414 | { |
| 415 | fd = select->cache_fd; |
| 416 | break; |
| 417 | } |
| 418 | |
| 419 | /* then, lookup the ranges array */ |
| 420 | { |
| 421 | FT_Byte* p = select->data; |
| 422 | FT_Byte* p_limit = p + select->data_size; |
| 423 | FT_Byte fd2; |
| 424 | FT_UInt first, limit; |
| 425 | |
| 426 | |
| 427 | first = NEXT_UShort( p ); |
| 428 | do |
| 429 | { |
| 430 | if ( glyph_index < first ) |
| 431 | break; |
| 432 | |
| 433 | fd2 = *p++; |
| 434 | limit = NEXT_UShort( p ); |
| 435 | |
| 436 | if ( glyph_index < limit ) |
| 437 | { |
| 438 | fd = fd2; |
| 439 | |
| 440 | /* update cache */ |
| 441 | select->cache_first = first; |
| 442 | select->cache_count = limit-first; |
| 443 | select->cache_fd = fd2; |
| 444 | break; |
| 445 | } |
| 446 | first = limit; |
| 447 | |
| 448 | } while ( p < p_limit ); |
| 449 | } |
| 450 | break; |
| 451 | |
| 452 | default: |
| 453 | ; |
| 454 | } |
| 455 | |
| 456 | return fd; |
| 457 | } |
| 458 | |
| 459 | |
| 460 | /*************************************************************************/ |
| 461 | /*************************************************************************/ |
| 462 | /*** ***/ |
| 463 | /*** CFF font support ***/ |
| 464 | /*** ***/ |
| 465 | /*************************************************************************/ |
| 466 | /*************************************************************************/ |
| 467 | |
| 468 | |
| 469 | static |
| 470 | FT_Error CFF_Load_SubFont( CFF_SubFont* font, |
| 471 | CFF_Index* index, |
| 472 | FT_UInt font_index, |
| 473 | FT_Stream stream, |
| 474 | FT_ULong base_offset ) |
| 475 | { |
| 476 | FT_Error error; |
| 477 | T2_Parser parser; |
| 478 | FT_Byte* dict; |
| 479 | FT_ULong dict_len; |
| 480 | CFF_Font_Dict* top = &font->font_dict; |
| 481 | CFF_Private* priv = &font->private_dict; |
| 482 | |
| 483 | |
| 484 | T2_Parser_Init( &parser, T2CODE_TOPDICT, &font->font_dict ); |
| 485 | |
| 486 | /* set defaults */ |
| 487 | MEM_Set( top, 0, sizeof ( *top ) ); |
| 488 | |
| 489 | top->underline_position = -100; |
| 490 | top->underline_thickness = 50; |
| 491 | top->charstring_type = 2; |
| 492 | top->font_matrix.xx = 0x10000L; |
| 493 | top->font_matrix.yy = 0x10000L; |
| 494 | top->cid_count = 8720; |
| 495 | |
| 496 | error = T2_Access_Element( index, font_index, &dict, &dict_len ) || |
| 497 | T2_Parser_Run( &parser, dict, dict + dict_len ); |
| 498 | |
| 499 | T2_Forget_Element( index, &dict ); |
| 500 | |
| 501 | if ( error ) |
| 502 | goto Exit; |
| 503 | |
| 504 | /* if it is a CID font, we stop there */ |
| 505 | if ( top->cid_registry ) |
| 506 | goto Exit; |
| 507 | |
| 508 | /* parse the private dictionary, if any */ |
| 509 | if ( top->private_offset && top->private_size ) |
| 510 | { |
| 511 | /* set defaults */ |
| 512 | MEM_Set( priv, 0, sizeof ( *priv ) ); |
| 513 | |
| 514 | priv->blue_shift = 7; |
| 515 | priv->blue_fuzz = 1; |
| 516 | priv->lenIV = -1; |
| 517 | priv->expansion_factor = (FT_Fixed)0.06 * 0x10000L; |
| 518 | priv->blue_scale = (FT_Fixed)0.039625 * 0x10000L; |
| 519 | |
| 520 | T2_Parser_Init( &parser, T2CODE_PRIVATE, priv ); |
| 521 | |
| 522 | if ( FILE_Seek( base_offset + font->font_dict.private_offset ) || |
| 523 | ACCESS_Frame( font->font_dict.private_size ) ) |
| 524 | goto Exit; |
| 525 | |
| 526 | error = T2_Parser_Run( &parser, |
| 527 | (FT_Byte*)stream->cursor, |
| 528 | (FT_Byte*)stream->limit ); |
| 529 | FORGET_Frame(); |
| 530 | if ( error ) |
| 531 | goto Exit; |
| 532 | } |
| 533 | |
| 534 | /* read the local subrs, if any */ |
| 535 | if ( priv->local_subrs_offset ) |
| 536 | { |
| 537 | if ( FILE_Seek( base_offset + top->private_offset + |
| 538 | priv->local_subrs_offset ) ) |
| 539 | goto Exit; |
| 540 | |
| 541 | error = t2_new_cff_index( &font->local_subrs_index, stream, 1 ); |
| 542 | if ( error ) |
| 543 | goto Exit; |
| 544 | |
| 545 | font->num_local_subrs = font->local_subrs_index.count; |
| 546 | error = t2_explicit_cff_index( &font->local_subrs_index, |
| 547 | &font->local_subrs ); |
| 548 | } |
| 549 | |
| 550 | Exit: |
| 551 | return error; |
| 552 | } |
| 553 | |
| 554 | |
| 555 | static |
| 556 | void CFF_Done_SubFont( FT_Memory memory, |
| 557 | CFF_SubFont* subfont ) |
| 558 | { |
| 559 | if ( subfont ) |
| 560 | { |
| 561 | t2_done_cff_index( &subfont->local_subrs_index ); |
| 562 | FREE( subfont->local_subrs ); |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | |
| 567 | LOCAL_FUNC |
| 568 | FT_Error T2_Load_CFF_Font( FT_Stream stream, |
| 569 | FT_Int face_index, |
| 570 | CFF_Font* font ) |
| 571 | { |
| 572 | static const FT_Frame_Field cff_header_fields[] = |
| 573 | { |
| 574 | FT_FRAME_START( 4 ), |
| 575 | FT_FRAME_BYTE( CFF_Font, version_major ), |
| 576 | FT_FRAME_BYTE( CFF_Font, version_minor ), |
| 577 | FT_FRAME_BYTE( CFF_Font, header_size ), |
| 578 | FT_FRAME_BYTE( CFF_Font, absolute_offsize ), |
| 579 | FT_FRAME_END |
| 580 | }; |
| 581 | |
| 582 | FT_Error error; |
| 583 | FT_Memory memory = stream->memory; |
| 584 | FT_ULong base_offset; |
| 585 | CFF_Font_Dict* dict; |
| 586 | |
| 587 | |
| 588 | MEM_Set( font, 0, sizeof ( *font ) ); |
| 589 | font->stream = stream; |
| 590 | font->memory = memory; |
| 591 | dict = &font->top_font.font_dict; |
| 592 | base_offset = FILE_Pos(); |
| 593 | |
| 594 | /* read CFF font header */ |
| 595 | if ( READ_Fields( cff_header_fields, font ) ) |
| 596 | goto Exit; |
| 597 | |
| 598 | /* check format */ |
| 599 | if ( font->version_major != 1 || |
| 600 | font->header_size < 4 || |
| 601 | font->absolute_offsize > 4 ) |
| 602 | { |
| 603 | FT_TRACE2(( "[not a CFF font header!]\n" )); |
| 604 | error = FT_Err_Unknown_File_Format; |
| 605 | goto Exit; |
| 606 | } |
| 607 | |
| 608 | /* skip the rest of the header */ |
| 609 | (void)FILE_Skip( font->header_size - 4 ); |
| 610 | |
| 611 | /* read the name, top dict, string and global subrs index */ |
| 612 | error = t2_new_cff_index( &font->name_index, stream, 0 ) || |
| 613 | t2_new_cff_index( &font->font_dict_index, stream, 0 ) || |
| 614 | t2_new_cff_index( &font->string_index, stream, 0 ) || |
| 615 | t2_new_cff_index( &font->global_subrs_index, stream, 1 ); |
| 616 | if ( error ) |
| 617 | goto Exit; |
| 618 | |
| 619 | /* well, we don't really forget the `disabled' fonts... */ |
| 620 | font->num_faces = font->name_index.count; |
| 621 | if ( face_index >= (FT_Int)font->num_faces ) |
| 622 | { |
| 623 | FT_ERROR(( "T2_Load_CFF_Font: incorrect face index = %d\n", |
| 624 | face_index )); |
| 625 | error = T2_Err_Invalid_Argument; |
| 626 | } |
| 627 | |
| 628 | /* in case of a font format check, simply exit now */ |
| 629 | if ( face_index < 0 ) |
| 630 | goto Exit; |
| 631 | |
| 632 | /* now, parse the top-level font dictionary */ |
| 633 | error = CFF_Load_SubFont( &font->top_font, |
| 634 | &font->font_dict_index, |
| 635 | face_index, |
| 636 | stream, |
| 637 | base_offset ); |
| 638 | if ( error ) |
| 639 | goto Exit; |
| 640 | |
| 641 | /* now, check for a CID font */ |
| 642 | if ( dict->cid_registry ) |
| 643 | { |
| 644 | CFF_Index fd_index; |
| 645 | CFF_SubFont* sub; |
| 646 | FT_UInt index; |
| 647 | |
| 648 | |
| 649 | /* this is a CID-keyed font, we must now allocate a table of */ |
| 650 | /* sub-fonts, then load each of them separately */ |
| 651 | if ( FILE_Seek( base_offset + dict->cid_fd_array_offset ) ) |
| 652 | goto Exit; |
| 653 | |
| 654 | error = t2_new_cff_index( &fd_index, stream, 0 ); |
| 655 | if ( error ) |
| 656 | goto Exit; |
| 657 | |
| 658 | if ( fd_index.count > CFF_MAX_CID_FONTS ) |
| 659 | { |
| 660 | FT_ERROR(( "T2_Load_CFF_Font: FD array too large in CID font\n" )); |
| 661 | goto Fail_CID; |
| 662 | } |
| 663 | |
| 664 | /* allocate & read each font dict independently */ |
| 665 | font->num_subfonts = fd_index.count; |
| 666 | if ( ALLOC_ARRAY( sub, fd_index.count, CFF_SubFont ) ) |
| 667 | goto Fail_CID; |
| 668 | |
| 669 | /* setup pointer table */ |
| 670 | for ( index = 0; index < fd_index.count; index++ ) |
| 671 | font->subfonts[index] = sub + index; |
| 672 | |
| 673 | /* now load each sub font independently */ |
| 674 | for ( index = 0; index < fd_index.count; index++ ) |
| 675 | { |
| 676 | sub = font->subfonts[index]; |
| 677 | error = CFF_Load_SubFont( sub, &fd_index, index, |
| 678 | stream, base_offset ); |
| 679 | if ( error ) |
| 680 | goto Fail_CID; |
| 681 | } |
| 682 | |
| 683 | /* now load the FD Select array */ |
| 684 | error = CFF_Load_FD_Select( &font->fd_select, |
| 685 | dict->cid_count, |
| 686 | stream, |
| 687 | base_offset + dict->cid_fd_select_offset ); |
| 688 | |
| 689 | Fail_CID: |
| 690 | t2_done_cff_index( &fd_index ); |
| 691 | |
| 692 | if ( error ) |
| 693 | goto Exit; |
| 694 | } |
| 695 | else |
| 696 | font->num_subfonts = 0; |
| 697 | |
| 698 | /* read the charstrings index now */ |
| 699 | if ( dict->charstrings_offset == 0 ) |
| 700 | { |
| 701 | FT_ERROR(( "T2_Load_CFF_Font: no charstrings offset!\n" )); |
| 702 | error = FT_Err_Unknown_File_Format; |
| 703 | goto Exit; |
| 704 | } |
| 705 | |
| 706 | if ( FILE_Seek( base_offset + dict->charstrings_offset ) ) |
| 707 | goto Exit; |
| 708 | |
| 709 | error = t2_new_cff_index( &font->charstrings_index, stream, 0 ); |
| 710 | if ( error ) |
| 711 | goto Exit; |
| 712 | |
| 713 | /* explicit the global subrs */ |
| 714 | font->num_global_subrs = font->global_subrs_index.count; |
| 715 | font->num_glyphs = font->charstrings_index.count; |
| 716 | |
| 717 | error = t2_explicit_cff_index( &font->global_subrs_index, |
| 718 | &font->global_subrs ) ; |
| 719 | |
| 720 | if ( error ) |
| 721 | goto Exit; |
| 722 | |
| 723 | /* get the font name */ |
| 724 | font->font_name = T2_Get_Name( &font->name_index, face_index ); |
| 725 | |
| 726 | Exit: |
| 727 | return error; |
| 728 | } |
| 729 | |
| 730 | |
| 731 | LOCAL_FUNC |
| 732 | void T2_Done_CFF_Font( CFF_Font* font ) |
| 733 | { |
| 734 | FT_Memory memory = font->memory; |
| 735 | FT_UInt index; |
| 736 | |
| 737 | |
| 738 | t2_done_cff_index( &font->global_subrs_index ); |
| 739 | t2_done_cff_index( &font->string_index ); |
| 740 | t2_done_cff_index( &font->font_dict_index ); |
| 741 | t2_done_cff_index( &font->name_index ); |
| 742 | t2_done_cff_index( &font->charstrings_index ); |
| 743 | |
| 744 | /* release font dictionaries */ |
| 745 | for ( index = 0; index < font->num_subfonts; index++ ) |
| 746 | CFF_Done_SubFont( memory, font->subfonts[index] ); |
| 747 | |
| 748 | CFF_Done_SubFont( memory, &font->top_font ); |
| 749 | |
| 750 | CFF_Done_FD_Select( &font->fd_select, font->stream ); |
| 751 | |
| 752 | FREE( font->global_subrs ); |
| 753 | FREE( font->font_name ); |
| 754 | } |
| 755 | |
| 756 | |
| 757 | /* END */ |