1 /***************************************************************************/ 2 /* */ 3 /* winfnt.c */ 4 /* */ 5 /* FreeType font driver for Windows FNT/FON files */ 6 /* */ 7 /* Copyright 1996-2018 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9 /* Copyright 2003 Huw D M Davies for Codeweavers */ 10 /* Copyright 2007 Dmitry Timoshkov for Codeweavers */ 11 /* */ 12 /* This file is part of the FreeType project, and may only be used, */ 13 /* modified, and distributed under the terms of the FreeType project */ 14 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 15 /* this file you indicate that you have read the license and */ 16 /* understand and accept it fully. */ 17 /* */ 18 /***************************************************************************/ 19 20 21 #include <ft2build.h> 22 #include FT_WINFONTS_H 23 #include FT_INTERNAL_DEBUG_H 24 #include FT_INTERNAL_STREAM_H 25 #include FT_INTERNAL_OBJECTS_H 26 #include FT_TRUETYPE_IDS_H 27 28 #include "winfnt.h" 29 #include "fnterrs.h" 30 #include FT_SERVICE_WINFNT_H 31 #include FT_SERVICE_FONT_FORMAT_H 32 33 /*************************************************************************/ 34 /* */ 35 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 36 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 37 /* messages during execution. */ 38 /* */ 39 #undef FT_COMPONENT 40 #define FT_COMPONENT trace_winfnt 41 42 43 static const FT_Frame_Field winmz_header_fields[] = 44 { 45 #undef FT_STRUCTURE 46 #define FT_STRUCTURE WinMZ_HeaderRec 47 48 FT_FRAME_START( 64 ), 49 FT_FRAME_USHORT_LE ( magic ), 50 FT_FRAME_SKIP_BYTES( 29 * 2 ), 51 FT_FRAME_ULONG_LE ( lfanew ), 52 FT_FRAME_END 53 }; 54 55 static const FT_Frame_Field winne_header_fields[] = 56 { 57 #undef FT_STRUCTURE 58 #define FT_STRUCTURE WinNE_HeaderRec 59 60 FT_FRAME_START( 40 ), 61 FT_FRAME_USHORT_LE ( magic ), 62 FT_FRAME_SKIP_BYTES( 34 ), 63 FT_FRAME_USHORT_LE ( resource_tab_offset ), 64 FT_FRAME_USHORT_LE ( rname_tab_offset ), 65 FT_FRAME_END 66 }; 67 68 static const FT_Frame_Field winpe32_header_fields[] = 69 { 70 #undef FT_STRUCTURE 71 #define FT_STRUCTURE WinPE32_HeaderRec 72 73 FT_FRAME_START( 248 ), 74 FT_FRAME_ULONG_LE ( magic ), /* PE00 */ 75 FT_FRAME_USHORT_LE ( machine ), /* 0x014C - i386 */ 76 FT_FRAME_USHORT_LE ( number_of_sections ), 77 FT_FRAME_SKIP_BYTES( 12 ), 78 FT_FRAME_USHORT_LE ( size_of_optional_header ), 79 FT_FRAME_SKIP_BYTES( 2 ), 80 FT_FRAME_USHORT_LE ( magic32 ), /* 0x10B */ 81 FT_FRAME_SKIP_BYTES( 110 ), 82 FT_FRAME_ULONG_LE ( rsrc_virtual_address ), 83 FT_FRAME_ULONG_LE ( rsrc_size ), 84 FT_FRAME_SKIP_BYTES( 104 ), 85 FT_FRAME_END 86 }; 87 88 static const FT_Frame_Field winpe32_section_fields[] = 89 { 90 #undef FT_STRUCTURE 91 #define FT_STRUCTURE WinPE32_SectionRec 92 93 FT_FRAME_START( 40 ), 94 FT_FRAME_BYTES ( name, 8 ), 95 FT_FRAME_SKIP_BYTES( 4 ), 96 FT_FRAME_ULONG_LE ( virtual_address ), 97 FT_FRAME_ULONG_LE ( size_of_raw_data ), 98 FT_FRAME_ULONG_LE ( pointer_to_raw_data ), 99 FT_FRAME_SKIP_BYTES( 16 ), 100 FT_FRAME_END 101 }; 102 103 static const FT_Frame_Field winpe_rsrc_dir_fields[] = 104 { 105 #undef FT_STRUCTURE 106 #define FT_STRUCTURE WinPE_RsrcDirRec 107 108 FT_FRAME_START( 16 ), 109 FT_FRAME_ULONG_LE ( characteristics ), 110 FT_FRAME_ULONG_LE ( time_date_stamp ), 111 FT_FRAME_USHORT_LE( major_version ), 112 FT_FRAME_USHORT_LE( minor_version ), 113 FT_FRAME_USHORT_LE( number_of_named_entries ), 114 FT_FRAME_USHORT_LE( number_of_id_entries ), 115 FT_FRAME_END 116 }; 117 118 static const FT_Frame_Field winpe_rsrc_dir_entry_fields[] = 119 { 120 #undef FT_STRUCTURE 121 #define FT_STRUCTURE WinPE_RsrcDirEntryRec 122 123 FT_FRAME_START( 8 ), 124 FT_FRAME_ULONG_LE( name ), 125 FT_FRAME_ULONG_LE( offset ), 126 FT_FRAME_END 127 }; 128 129 static const FT_Frame_Field winpe_rsrc_data_entry_fields[] = 130 { 131 #undef FT_STRUCTURE 132 #define FT_STRUCTURE WinPE_RsrcDataEntryRec 133 134 FT_FRAME_START( 16 ), 135 FT_FRAME_ULONG_LE( offset_to_data ), 136 FT_FRAME_ULONG_LE( size ), 137 FT_FRAME_ULONG_LE( code_page ), 138 FT_FRAME_ULONG_LE( reserved ), 139 FT_FRAME_END 140 }; 141 142 static const FT_Frame_Field winfnt_header_fields[] = 143 { 144 #undef FT_STRUCTURE 145 #define FT_STRUCTURE FT_WinFNT_HeaderRec 146 147 FT_FRAME_START( 148 ), 148 FT_FRAME_USHORT_LE( version ), 149 FT_FRAME_ULONG_LE ( file_size ), 150 FT_FRAME_BYTES ( copyright, 60 ), 151 FT_FRAME_USHORT_LE( file_type ), 152 FT_FRAME_USHORT_LE( nominal_point_size ), 153 FT_FRAME_USHORT_LE( vertical_resolution ), 154 FT_FRAME_USHORT_LE( horizontal_resolution ), 155 FT_FRAME_USHORT_LE( ascent ), 156 FT_FRAME_USHORT_LE( internal_leading ), 157 FT_FRAME_USHORT_LE( external_leading ), 158 FT_FRAME_BYTE ( italic ), 159 FT_FRAME_BYTE ( underline ), 160 FT_FRAME_BYTE ( strike_out ), 161 FT_FRAME_USHORT_LE( weight ), 162 FT_FRAME_BYTE ( charset ), 163 FT_FRAME_USHORT_LE( pixel_width ), 164 FT_FRAME_USHORT_LE( pixel_height ), 165 FT_FRAME_BYTE ( pitch_and_family ), 166 FT_FRAME_USHORT_LE( avg_width ), 167 FT_FRAME_USHORT_LE( max_width ), 168 FT_FRAME_BYTE ( first_char ), 169 FT_FRAME_BYTE ( last_char ), 170 FT_FRAME_BYTE ( default_char ), 171 FT_FRAME_BYTE ( break_char ), 172 FT_FRAME_USHORT_LE( bytes_per_row ), 173 FT_FRAME_ULONG_LE ( device_offset ), 174 FT_FRAME_ULONG_LE ( face_name_offset ), 175 FT_FRAME_ULONG_LE ( bits_pointer ), 176 FT_FRAME_ULONG_LE ( bits_offset ), 177 FT_FRAME_BYTE ( reserved ), 178 FT_FRAME_ULONG_LE ( flags ), 179 FT_FRAME_USHORT_LE( A_space ), 180 FT_FRAME_USHORT_LE( B_space ), 181 FT_FRAME_USHORT_LE( C_space ), 182 FT_FRAME_ULONG_LE ( color_table_offset ), 183 FT_FRAME_BYTES ( reserved1, 16 ), 184 FT_FRAME_END 185 }; 186 187 188 static void 189 fnt_font_done( FNT_Face face ) 190 { 191 FT_Memory memory = FT_FACE( face )->memory; 192 FT_Stream stream = FT_FACE( face )->stream; 193 FNT_Font font = face->font; 194 195 196 if ( !font ) 197 return; 198 199 if ( font->fnt_frame ) 200 FT_FRAME_RELEASE( font->fnt_frame ); 201 FT_FREE( font->family_name ); 202 203 FT_FREE( font ); 204 face->font = NULL; 205 } 206 207 208 static FT_Error 209 fnt_font_load( FNT_Font font, 210 FT_Stream stream ) 211 { 212 FT_Error error; 213 FT_WinFNT_Header header = &font->header; 214 FT_Bool new_format; 215 FT_UInt size; 216 217 218 /* first of all, read the FNT header */ 219 if ( FT_STREAM_SEEK( font->offset ) || 220 FT_STREAM_READ_FIELDS( winfnt_header_fields, header ) ) 221 goto Exit; 222 223 /* check header */ 224 if ( header->version != 0x200 && 225 header->version != 0x300 ) 226 { 227 FT_TRACE2(( " not a Windows FNT file\n" )); 228 error = FT_THROW( Unknown_File_Format ); 229 goto Exit; 230 } 231 232 new_format = FT_BOOL( font->header.version == 0x300 ); 233 size = new_format ? 148 : 118; 234 235 if ( header->file_size < size ) 236 { 237 FT_TRACE2(( " not a Windows FNT file\n" )); 238 error = FT_THROW( Unknown_File_Format ); 239 goto Exit; 240 } 241 242 /* Version 2 doesn't have these fields */ 243 if ( header->version == 0x200 ) 244 { 245 header->flags = 0; 246 header->A_space = 0; 247 header->B_space = 0; 248 header->C_space = 0; 249 250 header->color_table_offset = 0; 251 } 252 253 if ( header->file_type & 1 ) 254 { 255 FT_TRACE2(( "[can't handle vector FNT fonts]\n" )); 256 error = FT_THROW( Unknown_File_Format ); 257 goto Exit; 258 } 259 260 /* this is a FNT file/table; extract its frame */ 261 if ( FT_STREAM_SEEK( font->offset ) || 262 FT_FRAME_EXTRACT( header->file_size, font->fnt_frame ) ) 263 goto Exit; 264 265 Exit: 266 return error; 267 } 268 269 270 static FT_Error 271 fnt_face_get_dll_font( FNT_Face face, 272 FT_Int face_instance_index ) 273 { 274 FT_Error error; 275 FT_Stream stream = FT_FACE( face )->stream; 276 FT_Memory memory = FT_FACE( face )->memory; 277 WinMZ_HeaderRec mz_header; 278 FT_Long face_index; 279 280 281 face->font = NULL; 282 283 face_index = FT_ABS( face_instance_index ) & 0xFFFF; 284 285 /* does it begin with an MZ header? */ 286 if ( FT_STREAM_SEEK( 0 ) || 287 FT_STREAM_READ_FIELDS( winmz_header_fields, &mz_header ) ) 288 goto Exit; 289 290 error = FT_ERR( Unknown_File_Format ); 291 if ( mz_header.magic == WINFNT_MZ_MAGIC ) 292 { 293 /* yes, now look for an NE header in the file */ 294 WinNE_HeaderRec ne_header; 295 296 297 FT_TRACE2(( "MZ signature found\n" )); 298 299 if ( FT_STREAM_SEEK( mz_header.lfanew ) || 300 FT_STREAM_READ_FIELDS( winne_header_fields, &ne_header ) ) 301 goto Exit; 302 303 error = FT_ERR( Unknown_File_Format ); 304 if ( ne_header.magic == WINFNT_NE_MAGIC ) 305 { 306 /* good, now look into the resource table for each FNT resource */ 307 FT_ULong res_offset = mz_header.lfanew + 308 ne_header.resource_tab_offset; 309 FT_UShort size_shift; 310 FT_UShort font_count = 0; 311 FT_ULong font_offset = 0; 312 313 314 FT_TRACE2(( "NE signature found\n" )); 315 316 if ( FT_STREAM_SEEK( res_offset ) || 317 FT_FRAME_ENTER( ne_header.rname_tab_offset - 318 ne_header.resource_tab_offset ) ) 319 goto Exit; 320 321 size_shift = FT_GET_USHORT_LE(); 322 323 /* Microsoft's specification of the executable-file header format */ 324 /* for `New Executable' (NE) doesn't give a limit for the */ 325 /* alignment shift count; however, in 1985, the year of the */ 326 /* specification release, only 32bit values were supported, thus */ 327 /* anything larger than 16 doesn't make sense in general, given */ 328 /* that file offsets are 16bit values, shifted by the alignment */ 329 /* shift count */ 330 if ( size_shift > 16 ) 331 { 332 FT_TRACE2(( "invalid alignment shift count for resource data\n" )); 333 error = FT_THROW( Invalid_File_Format ); 334 goto Exit; 335 } 336 337 338 for (;;) 339 { 340 FT_UShort type_id, count; 341 342 343 type_id = FT_GET_USHORT_LE(); 344 if ( !type_id ) 345 break; 346 347 count = FT_GET_USHORT_LE(); 348 349 if ( type_id == 0x8008U ) 350 { 351 font_count = count; 352 font_offset = FT_STREAM_POS() + 4 + 353 (FT_ULong)( stream->cursor - stream->limit ); 354 break; 355 } 356 357 stream->cursor += 4 + count * 12; 358 } 359 360 FT_FRAME_EXIT(); 361 362 if ( !font_count || !font_offset ) 363 { 364 FT_TRACE2(( "this file doesn't contain any FNT resources\n" )); 365 error = FT_THROW( Invalid_File_Format ); 366 goto Exit; 367 } 368 369 /* loading `winfnt_header_fields' needs at least 118 bytes; */ 370 /* use this as a rough measure to check the expected font size */ 371 if ( font_count * 118UL > stream->size ) 372 { 373 FT_TRACE2(( "invalid number of faces\n" )); 374 error = FT_THROW( Invalid_File_Format ); 375 goto Exit; 376 } 377 378 face->root.num_faces = font_count; 379 380 if ( face_instance_index < 0 ) 381 goto Exit; 382 383 if ( face_index >= font_count ) 384 { 385 error = FT_THROW( Invalid_Argument ); 386 goto Exit; 387 } 388 389 if ( FT_NEW( face->font ) ) 390 goto Exit; 391 392 if ( FT_STREAM_SEEK( font_offset + (FT_ULong)face_index * 12 ) || 393 FT_FRAME_ENTER( 12 ) ) 394 goto Fail; 395 396 face->font->offset = (FT_ULong)FT_GET_USHORT_LE() << size_shift; 397 face->font->fnt_size = (FT_ULong)FT_GET_USHORT_LE() << size_shift; 398 399 stream->cursor += 8; 400 401 FT_FRAME_EXIT(); 402 403 error = fnt_font_load( face->font, stream ); 404 } 405 else if ( ne_header.magic == WINFNT_PE_MAGIC ) 406 { 407 WinPE32_HeaderRec pe32_header; 408 WinPE32_SectionRec pe32_section; 409 WinPE_RsrcDirRec root_dir, name_dir, lang_dir; 410 WinPE_RsrcDirEntryRec dir_entry1, dir_entry2, dir_entry3; 411 WinPE_RsrcDataEntryRec data_entry; 412 413 FT_ULong root_dir_offset, name_dir_offset, lang_dir_offset; 414 FT_UShort i, j, k; 415 416 417 FT_TRACE2(( "PE signature found\n" )); 418 419 if ( FT_STREAM_SEEK( mz_header.lfanew ) || 420 FT_STREAM_READ_FIELDS( winpe32_header_fields, &pe32_header ) ) 421 goto Exit; 422 423 FT_TRACE2(( "magic %04lx, machine %02x, number_of_sections %u, " 424 "size_of_optional_header %02x\n" 425 "magic32 %02x, rsrc_virtual_address %04lx, " 426 "rsrc_size %04lx\n", 427 pe32_header.magic, pe32_header.machine, 428 pe32_header.number_of_sections, 429 pe32_header.size_of_optional_header, 430 pe32_header.magic32, pe32_header.rsrc_virtual_address, 431 pe32_header.rsrc_size )); 432 433 if ( pe32_header.magic != WINFNT_PE_MAGIC /* check full signature */ || 434 pe32_header.machine != 0x014C /* i386 */ || 435 pe32_header.size_of_optional_header != 0xE0 /* FIXME */ || 436 pe32_header.magic32 != 0x10B ) 437 { 438 FT_TRACE2(( "this file has an invalid PE header\n" )); 439 error = FT_THROW( Invalid_File_Format ); 440 goto Exit; 441 } 442 443 face->root.num_faces = 0; 444 445 for ( i = 0; i < pe32_header.number_of_sections; i++ ) 446 { 447 if ( FT_STREAM_READ_FIELDS( winpe32_section_fields, 448 &pe32_section ) ) 449 goto Exit; 450 451 FT_TRACE2(( "name %.8s, va %04lx, size %04lx, offset %04lx\n", 452 pe32_section.name, pe32_section.virtual_address, 453 pe32_section.size_of_raw_data, 454 pe32_section.pointer_to_raw_data )); 455 456 if ( pe32_header.rsrc_virtual_address == 457 pe32_section.virtual_address ) 458 goto Found_rsrc_section; 459 } 460 461 FT_TRACE2(( "this file doesn't contain any resources\n" )); 462 error = FT_THROW( Invalid_File_Format ); 463 goto Exit; 464 465 Found_rsrc_section: 466 FT_TRACE2(( "found resources section %.8s\n", pe32_section.name )); 467 468 if ( FT_STREAM_SEEK( pe32_section.pointer_to_raw_data ) || 469 FT_STREAM_READ_FIELDS( winpe_rsrc_dir_fields, &root_dir ) ) 470 goto Exit; 471 472 root_dir_offset = pe32_section.pointer_to_raw_data; 473 474 for ( i = 0; i < root_dir.number_of_named_entries + 475 root_dir.number_of_id_entries; i++ ) 476 { 477 if ( FT_STREAM_SEEK( root_dir_offset + 16 + i * 8 ) || 478 FT_STREAM_READ_FIELDS( winpe_rsrc_dir_entry_fields, 479 &dir_entry1 ) ) 480 goto Exit; 481 482 if ( !(dir_entry1.offset & 0x80000000UL ) /* DataIsDirectory */ ) 483 { 484 error = FT_THROW( Invalid_File_Format ); 485 goto Exit; 486 } 487 488 dir_entry1.offset &= ~0x80000000UL; 489 490 name_dir_offset = pe32_section.pointer_to_raw_data + 491 dir_entry1.offset; 492 493 if ( FT_STREAM_SEEK( pe32_section.pointer_to_raw_data + 494 dir_entry1.offset ) || 495 FT_STREAM_READ_FIELDS( winpe_rsrc_dir_fields, &name_dir ) ) 496 goto Exit; 497 498 for ( j = 0; j < name_dir.number_of_named_entries + 499 name_dir.number_of_id_entries; j++ ) 500 { 501 if ( FT_STREAM_SEEK( name_dir_offset + 16 + j * 8 ) || 502 FT_STREAM_READ_FIELDS( winpe_rsrc_dir_entry_fields, 503 &dir_entry2 ) ) 504 goto Exit; 505 506 if ( !(dir_entry2.offset & 0x80000000UL ) /* DataIsDirectory */ ) 507 { 508 error = FT_THROW( Invalid_File_Format ); 509 goto Exit; 510 } 511 512 dir_entry2.offset &= ~0x80000000UL; 513 514 lang_dir_offset = pe32_section.pointer_to_raw_data + 515 dir_entry2.offset; 516 517 if ( FT_STREAM_SEEK( pe32_section.pointer_to_raw_data + 518 dir_entry2.offset ) || 519 FT_STREAM_READ_FIELDS( winpe_rsrc_dir_fields, &lang_dir ) ) 520 goto Exit; 521 522 for ( k = 0; k < lang_dir.number_of_named_entries + 523 lang_dir.number_of_id_entries; k++ ) 524 { 525 if ( FT_STREAM_SEEK( lang_dir_offset + 16 + k * 8 ) || 526 FT_STREAM_READ_FIELDS( winpe_rsrc_dir_entry_fields, 527 &dir_entry3 ) ) 528 goto Exit; 529 530 if ( dir_entry2.offset & 0x80000000UL /* DataIsDirectory */ ) 531 { 532 error = FT_THROW( Invalid_File_Format ); 533 goto Exit; 534 } 535 536 if ( dir_entry1.name == 8 /* RT_FONT */ ) 537 { 538 if ( FT_STREAM_SEEK( root_dir_offset + dir_entry3.offset ) || 539 FT_STREAM_READ_FIELDS( winpe_rsrc_data_entry_fields, 540 &data_entry ) ) 541 goto Exit; 542 543 FT_TRACE2(( "found font #%lu, offset %04lx, " 544 "size %04lx, cp %lu\n", 545 dir_entry2.name, 546 pe32_section.pointer_to_raw_data + 547 data_entry.offset_to_data - 548 pe32_section.virtual_address, 549 data_entry.size, data_entry.code_page )); 550 551 if ( face_index == face->root.num_faces ) 552 { 553 if ( FT_NEW( face->font ) ) 554 goto Exit; 555 556 face->font->offset = pe32_section.pointer_to_raw_data + 557 data_entry.offset_to_data - 558 pe32_section.virtual_address; 559 face->font->fnt_size = data_entry.size; 560 561 error = fnt_font_load( face->font, stream ); 562 if ( error ) 563 { 564 FT_TRACE2(( "font #%lu load error 0x%x\n", 565 dir_entry2.name, error )); 566 goto Fail; 567 } 568 else 569 FT_TRACE2(( "font #%lu successfully loaded\n", 570 dir_entry2.name )); 571 } 572 573 face->root.num_faces++; 574 } 575 } 576 } 577 } 578 } 579 580 if ( !face->root.num_faces ) 581 { 582 FT_TRACE2(( "this file doesn't contain any RT_FONT resources\n" )); 583 error = FT_THROW( Invalid_File_Format ); 584 goto Exit; 585 } 586 587 if ( face_index >= face->root.num_faces ) 588 { 589 error = FT_THROW( Invalid_Argument ); 590 goto Exit; 591 } 592 } 593 594 Fail: 595 if ( error ) 596 fnt_font_done( face ); 597 598 Exit: 599 return error; 600 } 601 602 603 typedef struct FNT_CMapRec_ 604 { 605 FT_CMapRec cmap; 606 FT_UInt32 first; 607 FT_UInt32 count; 608 609 } FNT_CMapRec, *FNT_CMap; 610 611 612 static FT_Error 613 fnt_cmap_init( FNT_CMap cmap, 614 FT_Pointer pointer ) 615 { 616 FNT_Face face = (FNT_Face)FT_CMAP_FACE( cmap ); 617 FNT_Font font = face->font; 618 619 FT_UNUSED( pointer ); 620 621 622 cmap->first = (FT_UInt32) font->header.first_char; 623 cmap->count = (FT_UInt32)( font->header.last_char - cmap->first + 1 ); 624 625 return 0; 626 } 627 628 629 static FT_UInt 630 fnt_cmap_char_index( FNT_CMap cmap, 631 FT_UInt32 char_code ) 632 { 633 FT_UInt gindex = 0; 634 635 636 char_code -= cmap->first; 637 if ( char_code < cmap->count ) 638 /* we artificially increase the glyph index; */ 639 /* FNT_Load_Glyph reverts to the right one */ 640 gindex = (FT_UInt)( char_code + 1 ); 641 return gindex; 642 } 643 644 645 static FT_UInt32 646 fnt_cmap_char_next( FNT_CMap cmap, 647 FT_UInt32 *pchar_code ) 648 { 649 FT_UInt gindex = 0; 650 FT_UInt32 result = 0; 651 FT_UInt32 char_code = *pchar_code + 1; 652 653 654 if ( char_code <= cmap->first ) 655 { 656 result = cmap->first; 657 gindex = 1; 658 } 659 else 660 { 661 char_code -= cmap->first; 662 if ( char_code < cmap->count ) 663 { 664 result = cmap->first + char_code; 665 gindex = (FT_UInt)( char_code + 1 ); 666 } 667 } 668 669 *pchar_code = result; 670 return gindex; 671 } 672 673 674 static const FT_CMap_ClassRec fnt_cmap_class_rec = 675 { 676 sizeof ( FNT_CMapRec ), 677 678 (FT_CMap_InitFunc) fnt_cmap_init, 679 (FT_CMap_DoneFunc) NULL, 680 (FT_CMap_CharIndexFunc)fnt_cmap_char_index, 681 (FT_CMap_CharNextFunc) fnt_cmap_char_next, 682 683 NULL, NULL, NULL, NULL, NULL 684 }; 685 686 static FT_CMap_Class const fnt_cmap_class = &fnt_cmap_class_rec; 687 688 689 static void 690 FNT_Face_Done( FT_Face fntface ) /* FNT_Face */ 691 { 692 FNT_Face face = (FNT_Face)fntface; 693 FT_Memory memory; 694 695 696 if ( !face ) 697 return; 698 699 memory = FT_FACE_MEMORY( face ); 700 701 fnt_font_done( face ); 702 703 FT_FREE( fntface->available_sizes ); 704 fntface->num_fixed_sizes = 0; 705 } 706 707 708 static FT_Error 709 FNT_Face_Init( FT_Stream stream, 710 FT_Face fntface, /* FNT_Face */ 711 FT_Int face_instance_index, 712 FT_Int num_params, 713 FT_Parameter* params ) 714 { 715 FNT_Face face = (FNT_Face)fntface; 716 FT_Error error; 717 FT_Memory memory = FT_FACE_MEMORY( face ); 718 FT_Int face_index; 719 720 FT_UNUSED( num_params ); 721 FT_UNUSED( params ); 722 723 724 FT_TRACE2(( "Windows FNT driver\n" )); 725 726 face_index = FT_ABS( face_instance_index ) & 0xFFFF; 727 728 /* try to load font from a DLL */ 729 error = fnt_face_get_dll_font( face, face_instance_index ); 730 if ( !error && face_instance_index < 0 ) 731 goto Exit; 732 733 if ( FT_ERR_EQ( error, Unknown_File_Format ) ) 734 { 735 /* this didn't work; try to load a single FNT font */ 736 FNT_Font font; 737 738 if ( FT_NEW( face->font ) ) 739 goto Exit; 740 741 fntface->num_faces = 1; 742 743 font = face->font; 744 font->offset = 0; 745 font->fnt_size = stream->size; 746 747 error = fnt_font_load( font, stream ); 748 749 if ( !error ) 750 { 751 if ( face_instance_index < 0 ) 752 goto Exit; 753 754 if ( face_index > 0 ) 755 error = FT_THROW( Invalid_Argument ); 756 } 757 } 758 759 if ( error ) 760 goto Fail; 761 762 /* sanity check */ 763 if ( !face->font->header.pixel_height ) 764 { 765 FT_TRACE2(( "invalid pixel height\n" )); 766 error = FT_THROW( Invalid_File_Format ); 767 goto Fail; 768 } 769 770 /* we now need to fill the root FT_Face fields */ 771 /* with relevant information */ 772 { 773 FT_Face root = FT_FACE( face ); 774 FNT_Font font = face->font; 775 FT_ULong family_size; 776 777 778 root->face_index = face_index; 779 780 root->face_flags |= FT_FACE_FLAG_FIXED_SIZES | 781 FT_FACE_FLAG_HORIZONTAL; 782 783 if ( font->header.avg_width == font->header.max_width ) 784 root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; 785 786 if ( font->header.italic ) 787 root->style_flags |= FT_STYLE_FLAG_ITALIC; 788 789 if ( font->header.weight >= 800 ) 790 root->style_flags |= FT_STYLE_FLAG_BOLD; 791 792 /* set up the `fixed_sizes' array */ 793 if ( FT_NEW_ARRAY( root->available_sizes, 1 ) ) 794 goto Fail; 795 796 root->num_fixed_sizes = 1; 797 798 { 799 FT_Bitmap_Size* bsize = root->available_sizes; 800 FT_UShort x_res, y_res; 801 802 803 bsize->width = (FT_Short)font->header.avg_width; 804 bsize->height = (FT_Short)( font->header.pixel_height + 805 font->header.external_leading ); 806 bsize->size = font->header.nominal_point_size << 6; 807 808 x_res = font->header.horizontal_resolution; 809 if ( !x_res ) 810 x_res = 72; 811 812 y_res = font->header.vertical_resolution; 813 if ( !y_res ) 814 y_res = 72; 815 816 bsize->y_ppem = FT_MulDiv( bsize->size, y_res, 72 ); 817 bsize->y_ppem = FT_PIX_ROUND( bsize->y_ppem ); 818 819 /* 820 * this reads: 821 * 822 * the nominal height is larger than the bbox's height 823 * 824 * => nominal_point_size contains incorrect value; 825 * use pixel_height as the nominal height 826 */ 827 if ( bsize->y_ppem > ( font->header.pixel_height << 6 ) ) 828 { 829 FT_TRACE2(( "use pixel_height as the nominal height\n" )); 830 831 bsize->y_ppem = font->header.pixel_height << 6; 832 bsize->size = FT_MulDiv( bsize->y_ppem, 72, y_res ); 833 } 834 835 bsize->x_ppem = FT_MulDiv( bsize->size, x_res, 72 ); 836 bsize->x_ppem = FT_PIX_ROUND( bsize->x_ppem ); 837 } 838 839 { 840 FT_CharMapRec charmap; 841 842 843 charmap.encoding = FT_ENCODING_NONE; 844 /* initial platform/encoding should indicate unset status? */ 845 charmap.platform_id = TT_PLATFORM_APPLE_UNICODE; 846 charmap.encoding_id = TT_APPLE_ID_DEFAULT; 847 charmap.face = root; 848 849 if ( font->header.charset == FT_WinFNT_ID_MAC ) 850 { 851 charmap.encoding = FT_ENCODING_APPLE_ROMAN; 852 charmap.platform_id = TT_PLATFORM_MACINTOSH; 853 /* charmap.encoding_id = TT_MAC_ID_ROMAN; */ 854 } 855 856 error = FT_CMap_New( fnt_cmap_class, 857 NULL, 858 &charmap, 859 NULL ); 860 if ( error ) 861 goto Fail; 862 } 863 864 /* set up remaining flags */ 865 866 if ( font->header.last_char < font->header.first_char ) 867 { 868 FT_TRACE2(( "invalid number of glyphs\n" )); 869 error = FT_THROW( Invalid_File_Format ); 870 goto Fail; 871 } 872 873 /* reserve one slot for the .notdef glyph at index 0 */ 874 root->num_glyphs = font->header.last_char - 875 font->header.first_char + 1 + 1; 876 877 if ( font->header.face_name_offset >= font->header.file_size ) 878 { 879 FT_TRACE2(( "invalid family name offset\n" )); 880 error = FT_THROW( Invalid_File_Format ); 881 goto Fail; 882 } 883 family_size = font->header.file_size - font->header.face_name_offset; 884 /* Some broken fonts don't delimit the face name with a final */ 885 /* NULL byte -- the frame is erroneously one byte too small. */ 886 /* We thus allocate one more byte, setting it explicitly to */ 887 /* zero. */ 888 if ( FT_ALLOC( font->family_name, family_size + 1 ) ) 889 goto Fail; 890 891 FT_MEM_COPY( font->family_name, 892 font->fnt_frame + font->header.face_name_offset, 893 family_size ); 894 895 font->family_name[family_size] = '\0'; 896 897 if ( FT_REALLOC( font->family_name, 898 family_size, 899 ft_strlen( font->family_name ) + 1 ) ) 900 goto Fail; 901 902 root->family_name = font->family_name; 903 root->style_name = (char *)"Regular"; 904 905 if ( root->style_flags & FT_STYLE_FLAG_BOLD ) 906 { 907 if ( root->style_flags & FT_STYLE_FLAG_ITALIC ) 908 root->style_name = (char *)"Bold Italic"; 909 else 910 root->style_name = (char *)"Bold"; 911 } 912 else if ( root->style_flags & FT_STYLE_FLAG_ITALIC ) 913 root->style_name = (char *)"Italic"; 914 } 915 goto Exit; 916 917 Fail: 918 FNT_Face_Done( fntface ); 919 920 Exit: 921 return error; 922 } 923 924 925 static FT_Error 926 FNT_Size_Select( FT_Size size, 927 FT_ULong strike_index ) 928 { 929 FNT_Face face = (FNT_Face)size->face; 930 FT_WinFNT_Header header = &face->font->header; 931 932 FT_UNUSED( strike_index ); 933 934 935 FT_Select_Metrics( size->face, 0 ); 936 937 size->metrics.ascender = header->ascent * 64; 938 size->metrics.descender = -( header->pixel_height - 939 header->ascent ) * 64; 940 size->metrics.max_advance = header->max_width * 64; 941 942 return FT_Err_Ok; 943 } 944 945 946 static FT_Error 947 FNT_Size_Request( FT_Size size, 948 FT_Size_Request req ) 949 { 950 FNT_Face face = (FNT_Face)size->face; 951 FT_WinFNT_Header header = &face->font->header; 952 FT_Bitmap_Size* bsize = size->face->available_sizes; 953 FT_Error error = FT_ERR( Invalid_Pixel_Size ); 954 FT_Long height; 955 956 957 height = FT_REQUEST_HEIGHT( req ); 958 height = ( height + 32 ) >> 6; 959 960 switch ( req->type ) 961 { 962 case FT_SIZE_REQUEST_TYPE_NOMINAL: 963 if ( height == ( ( bsize->y_ppem + 32 ) >> 6 ) ) 964 error = FT_Err_Ok; 965 break; 966 967 case FT_SIZE_REQUEST_TYPE_REAL_DIM: 968 if ( height == header->pixel_height ) 969 error = FT_Err_Ok; 970 break; 971 972 default: 973 error = FT_THROW( Unimplemented_Feature ); 974 break; 975 } 976 977 if ( error ) 978 return error; 979 else 980 return FNT_Size_Select( size, 0 ); 981 } 982 983 984 static FT_Error 985 FNT_Load_Glyph( FT_GlyphSlot slot, 986 FT_Size size, 987 FT_UInt glyph_index, 988 FT_Int32 load_flags ) 989 { 990 FNT_Face face = (FNT_Face)FT_SIZE_FACE( size ); 991 FNT_Font font; 992 FT_Error error = FT_Err_Ok; 993 FT_Byte* p; 994 FT_UInt len; 995 FT_Bitmap* bitmap = &slot->bitmap; 996 FT_ULong offset; 997 FT_Bool new_format; 998 999 1000 if ( !face ) 1001 { 1002 error = FT_THROW( Invalid_Face_Handle ); 1003 goto Exit; 1004 } 1005 1006 font = face->font; 1007 1008 if ( !font || 1009 glyph_index >= (FT_UInt)( FT_FACE( face )->num_glyphs ) ) 1010 { 1011 error = FT_THROW( Invalid_Argument ); 1012 goto Exit; 1013 } 1014 1015 FT_TRACE1(( "FNT_Load_Glyph: glyph index %d\n", glyph_index )); 1016 1017 if ( glyph_index > 0 ) 1018 glyph_index--; /* revert to real index */ 1019 else 1020 glyph_index = font->header.default_char; /* the `.notdef' glyph */ 1021 1022 new_format = FT_BOOL( font->header.version == 0x300 ); 1023 len = new_format ? 6 : 4; 1024 1025 /* get glyph width and offset */ 1026 offset = ( new_format ? 148 : 118 ) + len * glyph_index; 1027 1028 if ( offset >= font->header.file_size - 2 - ( new_format ? 4 : 2 ) ) 1029 { 1030 FT_TRACE2(( "invalid FNT offset\n" )); 1031 error = FT_THROW( Invalid_File_Format ); 1032 goto Exit; 1033 } 1034 1035 p = font->fnt_frame + offset; 1036 1037 bitmap->width = FT_NEXT_USHORT_LE( p ); 1038 1039 /* jump to glyph entry */ 1040 if ( new_format ) 1041 offset = FT_NEXT_ULONG_LE( p ); 1042 else 1043 offset = FT_NEXT_USHORT_LE( p ); 1044 1045 if ( offset >= font->header.file_size ) 1046 { 1047 FT_TRACE2(( "invalid FNT offset\n" )); 1048 error = FT_THROW( Invalid_File_Format ); 1049 goto Exit; 1050 } 1051 1052 bitmap->rows = font->header.pixel_height; 1053 bitmap->pixel_mode = FT_PIXEL_MODE_MONO; 1054 1055 slot->bitmap_left = 0; 1056 slot->bitmap_top = font->header.ascent; 1057 slot->format = FT_GLYPH_FORMAT_BITMAP; 1058 1059 /* now set up metrics */ 1060 slot->metrics.width = (FT_Pos)( bitmap->width << 6 ); 1061 slot->metrics.height = (FT_Pos)( bitmap->rows << 6 ); 1062 slot->metrics.horiAdvance = (FT_Pos)( bitmap->width << 6 ); 1063 slot->metrics.horiBearingX = 0; 1064 slot->metrics.horiBearingY = slot->bitmap_top << 6; 1065 1066 ft_synthesize_vertical_metrics( &slot->metrics, 1067 (FT_Pos)( bitmap->rows << 6 ) ); 1068 1069 if ( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) 1070 goto Exit; 1071 1072 /* jump to glyph data */ 1073 p = font->fnt_frame + /* font->header.bits_offset */ + offset; 1074 1075 /* allocate and build bitmap */ 1076 { 1077 FT_Memory memory = FT_FACE_MEMORY( slot->face ); 1078 FT_UInt pitch = ( bitmap->width + 7 ) >> 3; 1079 FT_Byte* column; 1080 FT_Byte* write; 1081 1082 1083 bitmap->pitch = (int)pitch; 1084 if ( !pitch || 1085 offset + pitch * bitmap->rows > font->header.file_size ) 1086 { 1087 FT_TRACE2(( "invalid bitmap width\n" )); 1088 error = FT_THROW( Invalid_File_Format ); 1089 goto Exit; 1090 } 1091 1092 /* note: since glyphs are stored in columns and not in rows we */ 1093 /* can't use ft_glyphslot_set_bitmap */ 1094 if ( FT_ALLOC_MULT( bitmap->buffer, bitmap->rows, pitch ) ) 1095 goto Exit; 1096 1097 column = (FT_Byte*)bitmap->buffer; 1098 1099 for ( ; pitch > 0; pitch--, column++ ) 1100 { 1101 FT_Byte* limit = p + bitmap->rows; 1102 1103 1104 for ( write = column; p < limit; p++, write += bitmap->pitch ) 1105 *write = *p; 1106 } 1107 1108 slot->internal->flags = FT_GLYPH_OWN_BITMAP; 1109 } 1110 1111 Exit: 1112 return error; 1113 } 1114 1115 1116 static FT_Error 1117 winfnt_get_header( FT_Face face, 1118 FT_WinFNT_HeaderRec *aheader ) 1119 { 1120 FNT_Font font = ((FNT_Face)face)->font; 1121 1122 1123 *aheader = font->header; 1124 1125 return 0; 1126 } 1127 1128 1129 static const FT_Service_WinFntRec winfnt_service_rec = 1130 { 1131 winfnt_get_header /* get_header */ 1132 }; 1133 1134 /* 1135 * SERVICE LIST 1136 * 1137 */ 1138 1139 static const FT_ServiceDescRec winfnt_services[] = 1140 { 1141 { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_WINFNT }, 1142 { FT_SERVICE_ID_WINFNT, &winfnt_service_rec }, 1143 { NULL, NULL } 1144 }; 1145 1146 1147 static FT_Module_Interface 1148 winfnt_get_service( FT_Module module, 1149 const FT_String* service_id ) 1150 { 1151 FT_UNUSED( module ); 1152 1153 return ft_service_list_lookup( winfnt_services, service_id ); 1154 } 1155 1156 1157 1158 1159 FT_CALLBACK_TABLE_DEF 1160 const FT_Driver_ClassRec winfnt_driver_class = 1161 { 1162 { 1163 FT_MODULE_FONT_DRIVER | 1164 FT_MODULE_DRIVER_NO_OUTLINES, 1165 sizeof ( FT_DriverRec ), 1166 1167 "winfonts", 1168 0x10000L, 1169 0x20000L, 1170 1171 NULL, /* module-specific interface */ 1172 1173 NULL, /* FT_Module_Constructor module_init */ 1174 NULL, /* FT_Module_Destructor module_done */ 1175 winfnt_get_service /* FT_Module_Requester get_interface */ 1176 }, 1177 1178 sizeof ( FNT_FaceRec ), 1179 sizeof ( FT_SizeRec ), 1180 sizeof ( FT_GlyphSlotRec ), 1181 1182 FNT_Face_Init, /* FT_Face_InitFunc init_face */ 1183 FNT_Face_Done, /* FT_Face_DoneFunc done_face */ 1184 NULL, /* FT_Size_InitFunc init_size */ 1185 NULL, /* FT_Size_DoneFunc done_size */ 1186 NULL, /* FT_Slot_InitFunc init_slot */ 1187 NULL, /* FT_Slot_DoneFunc done_slot */ 1188 1189 FNT_Load_Glyph, /* FT_Slot_LoadFunc load_glyph */ 1190 1191 NULL, /* FT_Face_GetKerningFunc get_kerning */ 1192 NULL, /* FT_Face_AttachFunc attach_file */ 1193 NULL, /* FT_Face_GetAdvancesFunc get_advances */ 1194 1195 FNT_Size_Request, /* FT_Size_RequestFunc request_size */ 1196 FNT_Size_Select /* FT_Size_SelectFunc select_size */ 1197 }; 1198 1199 1200 /* END */ 1201
