1 /***************************************************************************/ 2 /* */ 3 /* ftobjs.c */ 4 /* */ 5 /* The FreeType private base classes (body). */ 6 /* */ 7 /* Copyright 1996-2017 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9 /* */ 10 /* This file is part of the FreeType project, and may only be used, */ 11 /* modified, and distributed under the terms of the FreeType project */ 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13 /* this file you indicate that you have read the license and */ 14 /* understand and accept it fully. */ 15 /* */ 16 /***************************************************************************/ 17 18 19 #include <ft2build.h> 20 #include FT_LIST_H 21 #include FT_OUTLINE_H 22 #include FT_INTERNAL_VALIDATE_H 23 #include FT_INTERNAL_OBJECTS_H 24 #include FT_INTERNAL_DEBUG_H 25 #include FT_INTERNAL_RFORK_H 26 #include FT_INTERNAL_STREAM_H 27 #include FT_INTERNAL_SFNT_H /* for SFNT_Load_Table_Func */ 28 #include FT_TRUETYPE_TABLES_H 29 #include FT_TRUETYPE_TAGS_H 30 #include FT_TRUETYPE_IDS_H 31 32 #include FT_SERVICE_PROPERTIES_H 33 #include FT_SERVICE_SFNT_H 34 #include FT_SERVICE_POSTSCRIPT_NAME_H 35 #include FT_SERVICE_GLYPH_DICT_H 36 #include FT_SERVICE_TT_CMAP_H 37 #include FT_SERVICE_KERNING_H 38 #include FT_SERVICE_TRUETYPE_ENGINE_H 39 40 #ifdef FT_CONFIG_OPTION_MAC_FONTS 41 #include "ftbase.h" 42 #endif 43 44 45 #ifdef FT_DEBUG_LEVEL_TRACE 46 47 #include FT_BITMAP_H 48 49 #if defined( _MSC_VER ) /* Visual C++ (and Intel C++) */ 50 /* We disable the warning `conversion from XXX to YYY, */ 51 /* possible loss of data' in order to compile cleanly with */ 52 /* the maximum level of warnings: `md5.c' is non-FreeType */ 53 /* code, and it gets used during development builds only. */ 54 #pragma warning( push ) 55 #pragma warning( disable : 4244 ) 56 #endif /* _MSC_VER */ 57 58 /* It's easiest to include `md5.c' directly. However, since OpenSSL */ 59 /* also provides the same functions, there might be conflicts if */ 60 /* both FreeType and OpenSSL are built as static libraries. For */ 61 /* this reason, we put the MD5 stuff into the `FT_' namespace. */ 62 #define MD5_u32plus FT_MD5_u32plus 63 #define MD5_CTX FT_MD5_CTX 64 #define MD5_Init FT_MD5_Init 65 #define MD5_Update FT_MD5_Update 66 #define MD5_Final FT_MD5_Final 67 68 #undef HAVE_OPENSSL 69 70 #include "md5.c" 71 72 #if defined( _MSC_VER ) 73 #pragma warning( pop ) 74 #endif 75 76 #endif /* FT_DEBUG_LEVEL_TRACE */ 77 78 79 #define GRID_FIT_METRICS 80 81 82 /* forward declaration */ 83 static FT_Error 84 ft_open_face_internal( FT_Library library, 85 const FT_Open_Args* args, 86 FT_Long face_index, 87 FT_Face *aface, 88 FT_Bool test_mac_fonts ); 89 90 91 FT_BASE_DEF( FT_Pointer ) 92 ft_service_list_lookup( FT_ServiceDesc service_descriptors, 93 const char* service_id ) 94 { 95 FT_Pointer result = NULL; 96 FT_ServiceDesc desc = service_descriptors; 97 98 99 if ( desc && service_id ) 100 { 101 for ( ; desc->serv_id != NULL; desc++ ) 102 { 103 if ( ft_strcmp( desc->serv_id, service_id ) == 0 ) 104 { 105 result = (FT_Pointer)desc->serv_data; 106 break; 107 } 108 } 109 } 110 111 return result; 112 } 113 114 115 FT_BASE_DEF( void ) 116 ft_validator_init( FT_Validator valid, 117 const FT_Byte* base, 118 const FT_Byte* limit, 119 FT_ValidationLevel level ) 120 { 121 valid->base = base; 122 valid->limit = limit; 123 valid->level = level; 124 valid->error = FT_Err_Ok; 125 } 126 127 128 FT_BASE_DEF( FT_Int ) 129 ft_validator_run( FT_Validator valid ) 130 { 131 /* This function doesn't work! None should call it. */ 132 FT_UNUSED( valid ); 133 134 return -1; 135 } 136 137 138 FT_BASE_DEF( void ) 139 ft_validator_error( FT_Validator valid, 140 FT_Error error ) 141 { 142 /* since the cast below also disables the compiler's */ 143 /* type check, we introduce a dummy variable, which */ 144 /* will be optimized away */ 145 volatile ft_jmp_buf* jump_buffer = &valid->jump_buffer; 146 147 148 valid->error = error; 149 150 /* throw away volatileness; use `jump_buffer' or the */ 151 /* compiler may warn about an unused local variable */ 152 ft_longjmp( *(ft_jmp_buf*) jump_buffer, 1 ); 153 } 154 155 156 /*************************************************************************/ 157 /*************************************************************************/ 158 /*************************************************************************/ 159 /**** ****/ 160 /**** ****/ 161 /**** S T R E A M ****/ 162 /**** ****/ 163 /**** ****/ 164 /*************************************************************************/ 165 /*************************************************************************/ 166 /*************************************************************************/ 167 168 169 /* create a new input stream from an FT_Open_Args structure */ 170 /* */ 171 FT_BASE_DEF( FT_Error ) 172 FT_Stream_New( FT_Library library, 173 const FT_Open_Args* args, 174 FT_Stream *astream ) 175 { 176 FT_Error error; 177 FT_Memory memory; 178 FT_Stream stream = NULL; 179 180 181 *astream = NULL; 182 183 if ( !library ) 184 return FT_THROW( Invalid_Library_Handle ); 185 186 if ( !args ) 187 return FT_THROW( Invalid_Argument ); 188 189 memory = library->memory; 190 191 if ( FT_NEW( stream ) ) 192 goto Exit; 193 194 stream->memory = memory; 195 196 if ( args->flags & FT_OPEN_MEMORY ) 197 { 198 /* create a memory-based stream */ 199 FT_Stream_OpenMemory( stream, 200 (const FT_Byte*)args->memory_base, 201 (FT_ULong)args->memory_size ); 202 } 203 204 #ifndef FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT 205 206 else if ( args->flags & FT_OPEN_PATHNAME ) 207 { 208 /* create a normal system stream */ 209 error = FT_Stream_Open( stream, args->pathname ); 210 stream->pathname.pointer = args->pathname; 211 } 212 else if ( ( args->flags & FT_OPEN_STREAM ) && args->stream ) 213 { 214 /* use an existing, user-provided stream */ 215 216 /* in this case, we do not need to allocate a new stream object */ 217 /* since the caller is responsible for closing it himself */ 218 FT_FREE( stream ); 219 stream = args->stream; 220 } 221 222 #endif 223 224 else 225 error = FT_THROW( Invalid_Argument ); 226 227 if ( error ) 228 FT_FREE( stream ); 229 else 230 stream->memory = memory; /* just to be certain */ 231 232 *astream = stream; 233 234 Exit: 235 return error; 236 } 237 238 239 FT_BASE_DEF( void ) 240 FT_Stream_Free( FT_Stream stream, 241 FT_Int external ) 242 { 243 if ( stream ) 244 { 245 FT_Memory memory = stream->memory; 246 247 248 FT_Stream_Close( stream ); 249 250 if ( !external ) 251 FT_FREE( stream ); 252 } 253 } 254 255 256 /*************************************************************************/ 257 /* */ 258 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 259 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 260 /* messages during execution. */ 261 /* */ 262 #undef FT_COMPONENT 263 #define FT_COMPONENT trace_objs 264 265 266 /*************************************************************************/ 267 /*************************************************************************/ 268 /*************************************************************************/ 269 /**** ****/ 270 /**** ****/ 271 /**** FACE, SIZE & GLYPH SLOT OBJECTS ****/ 272 /**** ****/ 273 /**** ****/ 274 /*************************************************************************/ 275 /*************************************************************************/ 276 /*************************************************************************/ 277 278 279 static FT_Error 280 ft_glyphslot_init( FT_GlyphSlot slot ) 281 { 282 FT_Driver driver = slot->face->driver; 283 FT_Driver_Class clazz = driver->clazz; 284 FT_Memory memory = driver->root.memory; 285 FT_Error error = FT_Err_Ok; 286 FT_Slot_Internal internal = NULL; 287 288 289 slot->library = driver->root.library; 290 291 if ( FT_NEW( internal ) ) 292 goto Exit; 293 294 slot->internal = internal; 295 296 if ( FT_DRIVER_USES_OUTLINES( driver ) ) 297 error = FT_GlyphLoader_New( memory, &internal->loader ); 298 299 if ( !error && clazz->init_slot ) 300 error = clazz->init_slot( slot ); 301 302 Exit: 303 return error; 304 } 305 306 307 FT_BASE_DEF( void ) 308 ft_glyphslot_free_bitmap( FT_GlyphSlot slot ) 309 { 310 if ( slot->internal && ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) 311 { 312 FT_Memory memory = FT_FACE_MEMORY( slot->face ); 313 314 315 FT_FREE( slot->bitmap.buffer ); 316 slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; 317 } 318 else 319 { 320 /* assume that the bitmap buffer was stolen or not */ 321 /* allocated from the heap */ 322 slot->bitmap.buffer = NULL; 323 } 324 } 325 326 327 FT_BASE_DEF( void ) 328 ft_glyphslot_set_bitmap( FT_GlyphSlot slot, 329 FT_Byte* buffer ) 330 { 331 ft_glyphslot_free_bitmap( slot ); 332 333 slot->bitmap.buffer = buffer; 334 335 FT_ASSERT( (slot->internal->flags & FT_GLYPH_OWN_BITMAP) == 0 ); 336 } 337 338 339 FT_BASE_DEF( FT_Error ) 340 ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot, 341 FT_ULong size ) 342 { 343 FT_Memory memory = FT_FACE_MEMORY( slot->face ); 344 FT_Error error; 345 346 347 if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) 348 FT_FREE( slot->bitmap.buffer ); 349 else 350 slot->internal->flags |= FT_GLYPH_OWN_BITMAP; 351 352 (void)FT_ALLOC( slot->bitmap.buffer, size ); 353 return error; 354 } 355 356 357 static void 358 ft_glyphslot_clear( FT_GlyphSlot slot ) 359 { 360 /* free bitmap if needed */ 361 ft_glyphslot_free_bitmap( slot ); 362 363 /* clear all public fields in the glyph slot */ 364 FT_ZERO( &slot->metrics ); 365 FT_ZERO( &slot->outline ); 366 367 slot->bitmap.width = 0; 368 slot->bitmap.rows = 0; 369 slot->bitmap.pitch = 0; 370 slot->bitmap.pixel_mode = 0; 371 /* `slot->bitmap.buffer' has been handled by ft_glyphslot_free_bitmap */ 372 373 slot->bitmap_left = 0; 374 slot->bitmap_top = 0; 375 slot->num_subglyphs = 0; 376 slot->subglyphs = NULL; 377 slot->control_data = NULL; 378 slot->control_len = 0; 379 slot->other = NULL; 380 slot->format = FT_GLYPH_FORMAT_NONE; 381 382 slot->linearHoriAdvance = 0; 383 slot->linearVertAdvance = 0; 384 slot->lsb_delta = 0; 385 slot->rsb_delta = 0; 386 } 387 388 389 static void 390 ft_glyphslot_done( FT_GlyphSlot slot ) 391 { 392 FT_Driver driver = slot->face->driver; 393 FT_Driver_Class clazz = driver->clazz; 394 FT_Memory memory = driver->root.memory; 395 396 397 if ( clazz->done_slot ) 398 clazz->done_slot( slot ); 399 400 /* free bitmap buffer if needed */ 401 ft_glyphslot_free_bitmap( slot ); 402 403 /* slot->internal might be NULL in out-of-memory situations */ 404 if ( slot->internal ) 405 { 406 /* free glyph loader */ 407 if ( FT_DRIVER_USES_OUTLINES( driver ) ) 408 { 409 FT_GlyphLoader_Done( slot->internal->loader ); 410 slot->internal->loader = NULL; 411 } 412 413 FT_FREE( slot->internal ); 414 } 415 } 416 417 418 /* documentation is in ftobjs.h */ 419 420 FT_BASE_DEF( FT_Error ) 421 FT_New_GlyphSlot( FT_Face face, 422 FT_GlyphSlot *aslot ) 423 { 424 FT_Error error; 425 FT_Driver driver; 426 FT_Driver_Class clazz; 427 FT_Memory memory; 428 FT_GlyphSlot slot = NULL; 429 430 431 if ( !face ) 432 return FT_THROW( Invalid_Face_Handle ); 433 434 if ( !face->driver ) 435 return FT_THROW( Invalid_Argument ); 436 437 driver = face->driver; 438 clazz = driver->clazz; 439 memory = driver->root.memory; 440 441 FT_TRACE4(( "FT_New_GlyphSlot: Creating new slot object\n" )); 442 if ( !FT_ALLOC( slot, clazz->slot_object_size ) ) 443 { 444 slot->face = face; 445 446 error = ft_glyphslot_init( slot ); 447 if ( error ) 448 { 449 ft_glyphslot_done( slot ); 450 FT_FREE( slot ); 451 goto Exit; 452 } 453 454 slot->next = face->glyph; 455 face->glyph = slot; 456 457 if ( aslot ) 458 *aslot = slot; 459 } 460 else if ( aslot ) 461 *aslot = NULL; 462 463 464 Exit: 465 FT_TRACE4(( "FT_New_GlyphSlot: Return 0x%x\n", error )); 466 467 return error; 468 } 469 470 471 /* documentation is in ftobjs.h */ 472 473 FT_BASE_DEF( void ) 474 FT_Done_GlyphSlot( FT_GlyphSlot slot ) 475 { 476 if ( slot ) 477 { 478 FT_Driver driver = slot->face->driver; 479 FT_Memory memory = driver->root.memory; 480 FT_GlyphSlot prev; 481 FT_GlyphSlot cur; 482 483 484 /* Remove slot from its parent face's list */ 485 prev = NULL; 486 cur = slot->face->glyph; 487 488 while ( cur ) 489 { 490 if ( cur == slot ) 491 { 492 if ( !prev ) 493 slot->face->glyph = cur->next; 494 else 495 prev->next = cur->next; 496 497 /* finalize client-specific data */ 498 if ( slot->generic.finalizer ) 499 slot->generic.finalizer( slot ); 500 501 ft_glyphslot_done( slot ); 502 FT_FREE( slot ); 503 break; 504 } 505 prev = cur; 506 cur = cur->next; 507 } 508 } 509 } 510 511 512 /* documentation is in freetype.h */ 513 514 FT_EXPORT_DEF( void ) 515 FT_Set_Transform( FT_Face face, 516 FT_Matrix* matrix, 517 FT_Vector* delta ) 518 { 519 FT_Face_Internal internal; 520 521 522 if ( !face ) 523 return; 524 525 internal = face->internal; 526 527 internal->transform_flags = 0; 528 529 if ( !matrix ) 530 { 531 internal->transform_matrix.xx = 0x10000L; 532 internal->transform_matrix.xy = 0; 533 internal->transform_matrix.yx = 0; 534 internal->transform_matrix.yy = 0x10000L; 535 536 matrix = &internal->transform_matrix; 537 } 538 else 539 internal->transform_matrix = *matrix; 540 541 /* set transform_flags bit flag 0 if `matrix' isn't the identity */ 542 if ( ( matrix->xy | matrix->yx ) || 543 matrix->xx != 0x10000L || 544 matrix->yy != 0x10000L ) 545 internal->transform_flags |= 1; 546 547 if ( !delta ) 548 { 549 internal->transform_delta.x = 0; 550 internal->transform_delta.y = 0; 551 552 delta = &internal->transform_delta; 553 } 554 else 555 internal->transform_delta = *delta; 556 557 /* set transform_flags bit flag 1 if `delta' isn't the null vector */ 558 if ( delta->x | delta->y ) 559 internal->transform_flags |= 2; 560 } 561 562 563 static FT_Renderer 564 ft_lookup_glyph_renderer( FT_GlyphSlot slot ); 565 566 567 #ifdef GRID_FIT_METRICS 568 static void 569 ft_glyphslot_grid_fit_metrics( FT_GlyphSlot slot, 570 FT_Bool vertical ) 571 { 572 FT_Glyph_Metrics* metrics = &slot->metrics; 573 FT_Pos right, bottom; 574 575 576 if ( vertical ) 577 { 578 metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); 579 metrics->horiBearingY = FT_PIX_CEIL ( metrics->horiBearingY ); 580 581 right = FT_PIX_CEIL( metrics->vertBearingX + metrics->width ); 582 bottom = FT_PIX_CEIL( metrics->vertBearingY + metrics->height ); 583 584 metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); 585 metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); 586 587 metrics->width = right - metrics->vertBearingX; 588 metrics->height = bottom - metrics->vertBearingY; 589 } 590 else 591 { 592 metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); 593 metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); 594 595 right = FT_PIX_CEIL ( metrics->horiBearingX + metrics->width ); 596 bottom = FT_PIX_FLOOR( metrics->horiBearingY - metrics->height ); 597 598 metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); 599 metrics->horiBearingY = FT_PIX_CEIL ( metrics->horiBearingY ); 600 601 metrics->width = right - metrics->horiBearingX; 602 metrics->height = metrics->horiBearingY - bottom; 603 } 604 605 metrics->horiAdvance = FT_PIX_ROUND( metrics->horiAdvance ); 606 metrics->vertAdvance = FT_PIX_ROUND( metrics->vertAdvance ); 607 } 608 #endif /* GRID_FIT_METRICS */ 609 610 611 /* documentation is in freetype.h */ 612 613 FT_EXPORT_DEF( FT_Error ) 614 FT_Load_Glyph( FT_Face face, 615 FT_UInt glyph_index, 616 FT_Int32 load_flags ) 617 { 618 FT_Error error; 619 FT_Driver driver; 620 FT_GlyphSlot slot; 621 FT_Library library; 622 FT_Bool autohint = FALSE; 623 FT_Module hinter; 624 TT_Face ttface = (TT_Face)face; 625 626 627 if ( !face || !face->size || !face->glyph ) 628 return FT_THROW( Invalid_Face_Handle ); 629 630 /* The validity test for `glyph_index' is performed by the */ 631 /* font drivers. */ 632 633 slot = face->glyph; 634 ft_glyphslot_clear( slot ); 635 636 driver = face->driver; 637 library = driver->root.library; 638 hinter = library->auto_hinter; 639 640 /* resolve load flags dependencies */ 641 642 if ( load_flags & FT_LOAD_NO_RECURSE ) 643 load_flags |= FT_LOAD_NO_SCALE | 644 FT_LOAD_IGNORE_TRANSFORM; 645 646 if ( load_flags & FT_LOAD_NO_SCALE ) 647 { 648 load_flags |= FT_LOAD_NO_HINTING | 649 FT_LOAD_NO_BITMAP; 650 651 load_flags &= ~FT_LOAD_RENDER; 652 } 653 654 if ( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) 655 load_flags &= ~FT_LOAD_RENDER; 656 657 /* 658 * Determine whether we need to auto-hint or not. 659 * The general rules are: 660 * 661 * - Do only auto-hinting if we have a hinter module, a scalable font 662 * format dealing with outlines, and no transforms except simple 663 * slants and/or rotations by integer multiples of 90 degrees. 664 * 665 * - Then, auto-hint if FT_LOAD_FORCE_AUTOHINT is set or if we don't 666 * have a native font hinter. 667 * 668 * - Otherwise, auto-hint for LIGHT hinting mode or if there isn't 669 * any hinting bytecode in the TrueType/OpenType font. 670 * 671 * - Exception: The font is `tricky' and requires the native hinter to 672 * load properly. 673 */ 674 675 if ( hinter && 676 !( load_flags & FT_LOAD_NO_HINTING ) && 677 !( load_flags & FT_LOAD_NO_AUTOHINT ) && 678 FT_DRIVER_IS_SCALABLE( driver ) && 679 FT_DRIVER_USES_OUTLINES( driver ) && 680 !FT_IS_TRICKY( face ) && 681 ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) || 682 ( face->internal->transform_matrix.yx == 0 && 683 face->internal->transform_matrix.xx != 0 ) || 684 ( face->internal->transform_matrix.xx == 0 && 685 face->internal->transform_matrix.yx != 0 ) ) ) 686 { 687 if ( ( load_flags & FT_LOAD_FORCE_AUTOHINT ) || 688 !FT_DRIVER_HAS_HINTER( driver ) ) 689 autohint = TRUE; 690 else 691 { 692 FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); 693 694 695 /* the check for `num_locations' assures that we actually */ 696 /* test for instructions in a TTF and not in a CFF-based OTF */ 697 /* */ 698 /* since `maxSizeOfInstructions' might be unreliable, we */ 699 /* check the size of the `fpgm' and `prep' tables, too -- */ 700 /* the assumption is that there don't exist real TTFs where */ 701 /* both `fpgm' and `prep' tables are missing */ 702 if ( ( mode == FT_RENDER_MODE_LIGHT && 703 !FT_DRIVER_HINTS_LIGHTLY( driver ) ) || 704 ( FT_IS_SFNT( face ) && 705 ttface->num_locations && 706 ttface->max_profile.maxSizeOfInstructions == 0 && 707 ttface->font_program_size == 0 && 708 ttface->cvt_program_size == 0 ) ) 709 autohint = TRUE; 710 } 711 } 712 713 if ( autohint ) 714 { 715 FT_AutoHinter_Interface hinting; 716 717 718 /* try to load embedded bitmaps first if available */ 719 /* */ 720 /* XXX: This is really a temporary hack that should disappear */ 721 /* promptly with FreeType 2.1! */ 722 /* */ 723 if ( FT_HAS_FIXED_SIZES( face ) && 724 ( load_flags & FT_LOAD_NO_BITMAP ) == 0 ) 725 { 726 error = driver->clazz->load_glyph( slot, face->size, 727 glyph_index, 728 load_flags | FT_LOAD_SBITS_ONLY ); 729 730 if ( !error && slot->format == FT_GLYPH_FORMAT_BITMAP ) 731 goto Load_Ok; 732 } 733 734 { 735 FT_Face_Internal internal = face->internal; 736 FT_Int transform_flags = internal->transform_flags; 737 738 739 /* since the auto-hinter calls FT_Load_Glyph by itself, */ 740 /* make sure that glyphs aren't transformed */ 741 internal->transform_flags = 0; 742 743 /* load auto-hinted outline */ 744 hinting = (FT_AutoHinter_Interface)hinter->clazz->module_interface; 745 746 error = hinting->load_glyph( (FT_AutoHinter)hinter, 747 slot, face->size, 748 glyph_index, load_flags ); 749 750 internal->transform_flags = transform_flags; 751 } 752 } 753 else 754 { 755 error = driver->clazz->load_glyph( slot, 756 face->size, 757 glyph_index, 758 load_flags ); 759 if ( error ) 760 goto Exit; 761 762 if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) 763 { 764 /* check that the loaded outline is correct */ 765 error = FT_Outline_Check( &slot->outline ); 766 if ( error ) 767 goto Exit; 768 769 #ifdef GRID_FIT_METRICS 770 if ( !( load_flags & FT_LOAD_NO_HINTING ) ) 771 ft_glyphslot_grid_fit_metrics( slot, 772 FT_BOOL( load_flags & FT_LOAD_VERTICAL_LAYOUT ) ); 773 #endif 774 } 775 } 776 777 Load_Ok: 778 /* compute the advance */ 779 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) 780 { 781 slot->advance.x = 0; 782 slot->advance.y = slot->metrics.vertAdvance; 783 } 784 else 785 { 786 slot->advance.x = slot->metrics.horiAdvance; 787 slot->advance.y = 0; 788 } 789 790 /* compute the linear advance in 16.16 pixels */ 791 if ( ( load_flags & FT_LOAD_LINEAR_DESIGN ) == 0 && 792 ( FT_IS_SCALABLE( face ) ) ) 793 { 794 FT_Size_Metrics* metrics = &face->size->metrics; 795 796 797 /* it's tricky! */ 798 slot->linearHoriAdvance = FT_MulDiv( slot->linearHoriAdvance, 799 metrics->x_scale, 64 ); 800 801 slot->linearVertAdvance = FT_MulDiv( slot->linearVertAdvance, 802 metrics->y_scale, 64 ); 803 } 804 805 if ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) == 0 ) 806 { 807 FT_Face_Internal internal = face->internal; 808 809 810 /* now, transform the glyph image if needed */ 811 if ( internal->transform_flags ) 812 { 813 /* get renderer */ 814 FT_Renderer renderer = ft_lookup_glyph_renderer( slot ); 815 816 817 if ( renderer ) 818 error = renderer->clazz->transform_glyph( 819 renderer, slot, 820 &internal->transform_matrix, 821 &internal->transform_delta ); 822 else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) 823 { 824 /* apply `standard' transformation if no renderer is available */ 825 if ( internal->transform_flags & 1 ) 826 FT_Outline_Transform( &slot->outline, 827 &internal->transform_matrix ); 828 829 if ( internal->transform_flags & 2 ) 830 FT_Outline_Translate( &slot->outline, 831 internal->transform_delta.x, 832 internal->transform_delta.y ); 833 } 834 835 /* transform advance */ 836 FT_Vector_Transform( &slot->advance, &internal->transform_matrix ); 837 } 838 } 839 840 FT_TRACE5(( " x advance: %d\n" , slot->advance.x )); 841 FT_TRACE5(( " y advance: %d\n" , slot->advance.y )); 842 843 FT_TRACE5(( " linear x advance: %d\n" , slot->linearHoriAdvance )); 844 FT_TRACE5(( " linear y advance: %d\n" , slot->linearVertAdvance )); 845 846 /* do we need to render the image now? */ 847 if ( !error && 848 slot->format != FT_GLYPH_FORMAT_BITMAP && 849 slot->format != FT_GLYPH_FORMAT_COMPOSITE && 850 load_flags & FT_LOAD_RENDER ) 851 { 852 FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); 853 854 855 if ( mode == FT_RENDER_MODE_NORMAL && 856 (load_flags & FT_LOAD_MONOCHROME ) ) 857 mode = FT_RENDER_MODE_MONO; 858 859 error = FT_Render_Glyph( slot, mode ); 860 } 861 862 Exit: 863 return error; 864 } 865 866 867 /* documentation is in freetype.h */ 868 869 FT_EXPORT_DEF( FT_Error ) 870 FT_Load_Char( FT_Face face, 871 FT_ULong char_code, 872 FT_Int32 load_flags ) 873 { 874 FT_UInt glyph_index; 875 876 877 if ( !face ) 878 return FT_THROW( Invalid_Face_Handle ); 879 880 glyph_index = (FT_UInt)char_code; 881 if ( face->charmap ) 882 glyph_index = FT_Get_Char_Index( face, char_code ); 883 884 return FT_Load_Glyph( face, glyph_index, load_flags ); 885 } 886 887 888 /* destructor for sizes list */ 889 static void 890 destroy_size( FT_Memory memory, 891 FT_Size size, 892 FT_Driver driver ) 893 { 894 /* finalize client-specific data */ 895 if ( size->generic.finalizer ) 896 size->generic.finalizer( size ); 897 898 /* finalize format-specific stuff */ 899 if ( driver->clazz->done_size ) 900 driver->clazz->done_size( size ); 901 902 FT_FREE( size->internal ); 903 FT_FREE( size ); 904 } 905 906 907 static void 908 ft_cmap_done_internal( FT_CMap cmap ); 909 910 911 static void 912 destroy_charmaps( FT_Face face, 913 FT_Memory memory ) 914 { 915 FT_Int n; 916 917 918 if ( !face ) 919 return; 920 921 for ( n = 0; n < face->num_charmaps; n++ ) 922 { 923 FT_CMap cmap = FT_CMAP( face->charmaps[n] ); 924 925 926 ft_cmap_done_internal( cmap ); 927 928 face->charmaps[n] = NULL; 929 } 930 931 FT_FREE( face->charmaps ); 932 face->num_charmaps = 0; 933 } 934 935 936 /* destructor for faces list */ 937 static void 938 destroy_face( FT_Memory memory, 939 FT_Face face, 940 FT_Driver driver ) 941 { 942 FT_Driver_Class clazz = driver->clazz; 943 944 945 /* discard auto-hinting data */ 946 if ( face->autohint.finalizer ) 947 face->autohint.finalizer( face->autohint.data ); 948 949 /* Discard glyph slots for this face. */ 950 /* Beware! FT_Done_GlyphSlot() changes the field `face->glyph' */ 951 while ( face->glyph ) 952 FT_Done_GlyphSlot( face->glyph ); 953 954 /* discard all sizes for this face */ 955 FT_List_Finalize( &face->sizes_list, 956 (FT_List_Destructor)destroy_size, 957 memory, 958 driver ); 959 face->size = NULL; 960 961 /* now discard client data */ 962 if ( face->generic.finalizer ) 963 face->generic.finalizer( face ); 964 965 /* discard charmaps */ 966 destroy_charmaps( face, memory ); 967 968 /* finalize format-specific stuff */ 969 if ( clazz->done_face ) 970 clazz->done_face( face ); 971 972 /* close the stream for this face if needed */ 973 FT_Stream_Free( 974 face->stream, 975 ( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 ); 976 977 face->stream = NULL; 978 979 /* get rid of it */ 980 if ( face->internal ) 981 { 982 FT_FREE( face->internal ); 983 } 984 FT_FREE( face ); 985 } 986 987 988 static void 989 Destroy_Driver( FT_Driver driver ) 990 { 991 FT_List_Finalize( &driver->faces_list, 992 (FT_List_Destructor)destroy_face, 993 driver->root.memory, 994 driver ); 995 } 996 997 998 /*************************************************************************/ 999 /* */ 1000 /* <Function> */ 1001 /* find_unicode_charmap */ 1002 /* */ 1003 /* <Description> */ 1004 /* This function finds a Unicode charmap, if there is one. */ 1005 /* And if there is more than one, it tries to favour the more */ 1006 /* extensive one, i.e., one that supports UCS-4 against those which */ 1007 /* are limited to the BMP (said UCS-2 encoding.) */ 1008 /* */ 1009 /* This function is called from open_face() (just below), and also */ 1010 /* from FT_Select_Charmap( ..., FT_ENCODING_UNICODE ). */ 1011 /* */ 1012 static FT_Error 1013 find_unicode_charmap( FT_Face face ) 1014 { 1015 FT_CharMap* first; 1016 FT_CharMap* cur; 1017 1018 1019 /* caller should have already checked that `face' is valid */ 1020 FT_ASSERT( face ); 1021 1022 first = face->charmaps; 1023 1024 if ( !first ) 1025 return FT_THROW( Invalid_CharMap_Handle ); 1026 1027 /* 1028 * The original TrueType specification(s) only specified charmap 1029 * formats that are capable of mapping 8 or 16 bit character codes to 1030 * glyph indices. 1031 * 1032 * However, recent updates to the Apple and OpenType specifications 1033 * introduced new formats that are capable of mapping 32-bit character 1034 * codes as well. And these are already used on some fonts, mainly to 1035 * map non-BMP Asian ideographs as defined in Unicode. 1036 * 1037 * For compatibility purposes, these fonts generally come with 1038 * *several* Unicode charmaps: 1039 * 1040 * - One of them in the "old" 16-bit format, that cannot access 1041 * all glyphs in the font. 1042 * 1043 * - Another one in the "new" 32-bit format, that can access all 1044 * the glyphs. 1045 * 1046 * This function has been written to always favor a 32-bit charmap 1047 * when found. Otherwise, a 16-bit one is returned when found. 1048 */ 1049 1050 /* Since the `interesting' table, with IDs (3,10), is normally the */ 1051 /* last one, we loop backwards. This loses with type1 fonts with */ 1052 /* non-BMP characters (<.0001%), this wins with .ttf with non-BMP */ 1053 /* chars (.01% ?), and this is the same about 99.99% of the time! */ 1054 1055 cur = first + face->num_charmaps; /* points after the last one */ 1056 1057 for ( ; --cur >= first; ) 1058 { 1059 if ( cur[0]->encoding == FT_ENCODING_UNICODE ) 1060 { 1061 /* XXX If some new encodings to represent UCS-4 are added, */ 1062 /* they should be added here. */ 1063 if ( ( cur[0]->platform_id == TT_PLATFORM_MICROSOFT && 1064 cur[0]->encoding_id == TT_MS_ID_UCS_4 ) || 1065 ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE && 1066 cur[0]->encoding_id == TT_APPLE_ID_UNICODE_32 ) ) 1067 { 1068 face->charmap = cur[0]; 1069 return FT_Err_Ok; 1070 } 1071 } 1072 } 1073 1074 /* We do not have any UCS-4 charmap. */ 1075 /* Do the loop again and search for UCS-2 charmaps. */ 1076 cur = first + face->num_charmaps; 1077 1078 for ( ; --cur >= first; ) 1079 { 1080 if ( cur[0]->encoding == FT_ENCODING_UNICODE ) 1081 { 1082 face->charmap = cur[0]; 1083 return FT_Err_Ok; 1084 } 1085 } 1086 1087 return FT_THROW( Invalid_CharMap_Handle ); 1088 } 1089 1090 1091 /*************************************************************************/ 1092 /* */ 1093 /* <Function> */ 1094 /* find_variant_selector_charmap */ 1095 /* */ 1096 /* <Description> */ 1097 /* This function finds the variant selector charmap, if there is one. */ 1098 /* There can only be one (platform=0, specific=5, format=14). */ 1099 /* */ 1100 static FT_CharMap 1101 find_variant_selector_charmap( FT_Face face ) 1102 { 1103 FT_CharMap* first; 1104 FT_CharMap* end; 1105 FT_CharMap* cur; 1106 1107 1108 /* caller should have already checked that `face' is valid */ 1109 FT_ASSERT( face ); 1110 1111 first = face->charmaps; 1112 1113 if ( !first ) 1114 return NULL; 1115 1116 end = first + face->num_charmaps; /* points after the last one */ 1117 1118 for ( cur = first; cur < end; cur++ ) 1119 { 1120 if ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE && 1121 cur[0]->encoding_id == TT_APPLE_ID_VARIANT_SELECTOR && 1122 FT_Get_CMap_Format( cur[0] ) == 14 ) 1123 return cur[0]; 1124 } 1125 1126 return NULL; 1127 } 1128 1129 1130 /*************************************************************************/ 1131 /* */ 1132 /* <Function> */ 1133 /* open_face */ 1134 /* */ 1135 /* <Description> */ 1136 /* This function does some work for FT_Open_Face(). */ 1137 /* */ 1138 static FT_Error 1139 open_face( FT_Driver driver, 1140 FT_Stream *astream, 1141 FT_Bool external_stream, 1142 FT_Long face_index, 1143 FT_Int num_params, 1144 FT_Parameter* params, 1145 FT_Face *aface ) 1146 { 1147 FT_Memory memory; 1148 FT_Driver_Class clazz; 1149 FT_Face face = NULL; 1150 FT_Face_Internal internal = NULL; 1151 1152 FT_Error error, error2; 1153 1154 1155 clazz = driver->clazz; 1156 memory = driver->root.memory; 1157 1158 /* allocate the face object and perform basic initialization */ 1159 if ( FT_ALLOC( face, clazz->face_object_size ) ) 1160 goto Fail; 1161 1162 face->driver = driver; 1163 face->memory = memory; 1164 face->stream = *astream; 1165 1166 /* set the FT_FACE_FLAG_EXTERNAL_STREAM bit for FT_Done_Face */ 1167 if ( external_stream ) 1168 face->face_flags |= FT_FACE_FLAG_EXTERNAL_STREAM; 1169 1170 if ( FT_NEW( internal ) ) 1171 goto Fail; 1172 1173 face->internal = internal; 1174 1175 #ifdef FT_CONFIG_OPTION_INCREMENTAL 1176 { 1177 int i; 1178 1179 1180 face->internal->incremental_interface = NULL; 1181 for ( i = 0; i < num_params && !face->internal->incremental_interface; 1182 i++ ) 1183 if ( params[i].tag == FT_PARAM_TAG_INCREMENTAL ) 1184 face->internal->incremental_interface = 1185 (FT_Incremental_Interface)params[i].data; 1186 } 1187 #endif 1188 1189 if ( clazz->init_face ) 1190 error = clazz->init_face( *astream, 1191 face, 1192 (FT_Int)face_index, 1193 num_params, 1194 params ); 1195 *astream = face->stream; /* Stream may have been changed. */ 1196 if ( error ) 1197 goto Fail; 1198 1199 /* select Unicode charmap by default */ 1200 error2 = find_unicode_charmap( face ); 1201 1202 /* if no Unicode charmap can be found, FT_Err_Invalid_CharMap_Handle */ 1203 /* is returned. */ 1204 1205 /* no error should happen, but we want to play safe */ 1206 if ( error2 && FT_ERR_NEQ( error2, Invalid_CharMap_Handle ) ) 1207 { 1208 error = error2; 1209 goto Fail; 1210 } 1211 1212 *aface = face; 1213 1214 Fail: 1215 if ( error ) 1216 { 1217 destroy_charmaps( face, memory ); 1218 if ( clazz->done_face ) 1219 clazz->done_face( face ); 1220 FT_FREE( internal ); 1221 FT_FREE( face ); 1222 *aface = NULL; 1223 } 1224 1225 return error; 1226 } 1227 1228 1229 /* there's a Mac-specific extended implementation of FT_New_Face() */ 1230 /* in src/base/ftmac.c */ 1231 1232 #ifndef FT_MACINTOSH 1233 1234 /* documentation is in freetype.h */ 1235 1236 FT_EXPORT_DEF( FT_Error ) 1237 FT_New_Face( FT_Library library, 1238 const char* pathname, 1239 FT_Long face_index, 1240 FT_Face *aface ) 1241 { 1242 FT_Open_Args args; 1243 1244 1245 /* test for valid `library' and `aface' delayed to `FT_Open_Face' */ 1246 if ( !pathname ) 1247 return FT_THROW( Invalid_Argument ); 1248 1249 args.flags = FT_OPEN_PATHNAME; 1250 args.pathname = (char*)pathname; 1251 args.stream = NULL; 1252 1253 return ft_open_face_internal( library, &args, face_index, aface, 1 ); 1254 } 1255 1256 #endif 1257 1258 1259 /* documentation is in freetype.h */ 1260 1261 FT_EXPORT_DEF( FT_Error ) 1262 FT_New_Memory_Face( FT_Library library, 1263 const FT_Byte* file_base, 1264 FT_Long file_size, 1265 FT_Long face_index, 1266 FT_Face *aface ) 1267 { 1268 FT_Open_Args args; 1269 1270 1271 /* test for valid `library' and `face' delayed to `FT_Open_Face' */ 1272 if ( !file_base ) 1273 return FT_THROW( Invalid_Argument ); 1274 1275 args.flags = FT_OPEN_MEMORY; 1276 args.memory_base = file_base; 1277 args.memory_size = file_size; 1278 args.stream = NULL; 1279 1280 return ft_open_face_internal( library, &args, face_index, aface, 1 ); 1281 } 1282 1283 1284 #ifdef FT_CONFIG_OPTION_MAC_FONTS 1285 1286 /* The behavior here is very similar to that in base/ftmac.c, but it */ 1287 /* is designed to work on non-mac systems, so no mac specific calls. */ 1288 /* */ 1289 /* We look at the file and determine if it is a mac dfont file or a mac */ 1290 /* resource file, or a macbinary file containing a mac resource file. */ 1291 /* */ 1292 /* Unlike ftmac I'm not going to look at a `FOND'. I don't really see */ 1293 /* the point, especially since there may be multiple `FOND' resources. */ 1294 /* Instead I'll just look for `sfnt' and `POST' resources, ordered as */ 1295 /* they occur in the file. */ 1296 /* */ 1297 /* Note that multiple `POST' resources do not mean multiple postscript */ 1298 /* fonts; they all get jammed together to make what is essentially a */ 1299 /* pfb file. */ 1300 /* */ 1301 /* We aren't interested in `NFNT' or `FONT' bitmap resources. */ 1302 /* */ 1303 /* As soon as we get an `sfnt' load it into memory and pass it off to */ 1304 /* FT_Open_Face. */ 1305 /* */ 1306 /* If we have a (set of) `POST' resources, massage them into a (memory) */ 1307 /* pfb file and pass that to FT_Open_Face. (As with ftmac.c I'm not */ 1308 /* going to try to save the kerning info. After all that lives in the */ 1309 /* `FOND' which isn't in the file containing the `POST' resources so */ 1310 /* we don't really have access to it. */ 1311 1312 1313 /* Finalizer for a memory stream; gets called by FT_Done_Face(). */ 1314 /* It frees the memory it uses. */ 1315 /* From `ftmac.c'. */ 1316 static void 1317 memory_stream_close( FT_Stream stream ) 1318 { 1319 FT_Memory memory = stream->memory; 1320 1321 1322 FT_FREE( stream->base ); 1323 1324 stream->size = 0; 1325 stream->base = NULL; 1326 stream->close = NULL; 1327 } 1328 1329 1330 /* Create a new memory stream from a buffer and a size. */ 1331 /* From `ftmac.c'. */ 1332 static FT_Error 1333 new_memory_stream( FT_Library library, 1334 FT_Byte* base, 1335 FT_ULong size, 1336 FT_Stream_CloseFunc close, 1337 FT_Stream *astream ) 1338 { 1339 FT_Error error; 1340 FT_Memory memory; 1341 FT_Stream stream = NULL; 1342 1343 1344 if ( !library ) 1345 return FT_THROW( Invalid_Library_Handle ); 1346 1347 if ( !base ) 1348 return FT_THROW( Invalid_Argument ); 1349 1350 *astream = NULL; 1351 memory = library->memory; 1352 if ( FT_NEW( stream ) ) 1353 goto Exit; 1354 1355 FT_Stream_OpenMemory( stream, base, size ); 1356 1357 stream->close = close; 1358 1359 *astream = stream; 1360 1361 Exit: 1362 return error; 1363 } 1364 1365 1366 /* Create a new FT_Face given a buffer and a driver name. */ 1367 /* From `ftmac.c'. */ 1368 FT_LOCAL_DEF( FT_Error ) 1369 open_face_from_buffer( FT_Library library, 1370 FT_Byte* base, 1371 FT_ULong size, 1372 FT_Long face_index, 1373 const char* driver_name, 1374 FT_Face *aface ) 1375 { 1376 FT_Open_Args args; 1377 FT_Error error; 1378 FT_Stream stream = NULL; 1379 FT_Memory memory = library->memory; 1380 1381 1382 error = new_memory_stream( library, 1383 base, 1384 size, 1385 memory_stream_close, 1386 &stream ); 1387 if ( error ) 1388 { 1389 FT_FREE( base ); 1390 return error; 1391 } 1392 1393 args.flags = FT_OPEN_STREAM; 1394 args.stream = stream; 1395 if ( driver_name ) 1396 { 1397 args.flags = args.flags | FT_OPEN_DRIVER; 1398 args.driver = FT_Get_Module( library, driver_name ); 1399 } 1400 1401 #ifdef FT_MACINTOSH 1402 /* At this point, the face index has served its purpose; */ 1403 /* whoever calls this function has already used it to */ 1404 /* locate the correct font data. We should not propagate */ 1405 /* this index to FT_Open_Face() (unless it is negative). */ 1406 1407 if ( face_index > 0 ) 1408 face_index &= 0x7FFF0000L; /* retain GX data */ 1409 #endif 1410 1411 error = ft_open_face_internal( library, &args, face_index, aface, 0 ); 1412 1413 if ( !error ) 1414 (*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM; 1415 else 1416 #ifdef FT_MACINTOSH 1417 FT_Stream_Free( stream, 0 ); 1418 #else 1419 { 1420 FT_Stream_Close( stream ); 1421 FT_FREE( stream ); 1422 } 1423 #endif 1424 1425 return error; 1426 } 1427 1428 1429 /* Look up `TYP1' or `CID ' table from sfnt table directory. */ 1430 /* `offset' and `length' must exclude the binary header in tables. */ 1431 1432 /* Type 1 and CID-keyed font drivers should recognize sfnt-wrapped */ 1433 /* format too. Here, since we can't expect that the TrueType font */ 1434 /* driver is loaded unconditionally, we must parse the font by */ 1435 /* ourselves. We are only interested in the name of the table and */ 1436 /* the offset. */ 1437 1438 static FT_Error 1439 ft_lookup_PS_in_sfnt_stream( FT_Stream stream, 1440 FT_Long face_index, 1441 FT_ULong* offset, 1442 FT_ULong* length, 1443 FT_Bool* is_sfnt_cid ) 1444 { 1445 FT_Error error; 1446 FT_UShort numTables; 1447 FT_Long pstable_index; 1448 FT_ULong tag; 1449 int i; 1450 1451 1452 *offset = 0; 1453 *length = 0; 1454 *is_sfnt_cid = FALSE; 1455 1456 /* TODO: support for sfnt-wrapped PS/CID in TTC format */ 1457 1458 /* version check for 'typ1' (should be ignored?) */ 1459 if ( FT_READ_ULONG( tag ) ) 1460 return error; 1461 if ( tag != TTAG_typ1 ) 1462 return FT_THROW( Unknown_File_Format ); 1463 1464 if ( FT_READ_USHORT( numTables ) ) 1465 return error; 1466 if ( FT_STREAM_SKIP( 2 * 3 ) ) /* skip binary search header */ 1467 return error; 1468 1469 pstable_index = -1; 1470 *is_sfnt_cid = FALSE; 1471 1472 for ( i = 0; i < numTables; i++ ) 1473 { 1474 if ( FT_READ_ULONG( tag ) || FT_STREAM_SKIP( 4 ) || 1475 FT_READ_ULONG( *offset ) || FT_READ_ULONG( *length ) ) 1476 return error; 1477 1478 if ( tag == TTAG_CID ) 1479 { 1480 pstable_index++; 1481 *offset += 22; 1482 *length -= 22; 1483 *is_sfnt_cid = TRUE; 1484 if ( face_index < 0 ) 1485 return FT_Err_Ok; 1486 } 1487 else if ( tag == TTAG_TYP1 ) 1488 { 1489 pstable_index++; 1490 *offset += 24; 1491 *length -= 24; 1492 *is_sfnt_cid = FALSE; 1493 if ( face_index < 0 ) 1494 return FT_Err_Ok; 1495 } 1496 if ( face_index >= 0 && pstable_index == face_index ) 1497 return FT_Err_Ok; 1498 } 1499 1500 return FT_THROW( Table_Missing ); 1501 } 1502 1503 1504 FT_LOCAL_DEF( FT_Error ) 1505 open_face_PS_from_sfnt_stream( FT_Library library, 1506 FT_Stream stream, 1507 FT_Long face_index, 1508 FT_Int num_params, 1509 FT_Parameter *params, 1510 FT_Face *aface ) 1511 { 1512 FT_Error error; 1513 FT_Memory memory = library->memory; 1514 FT_ULong offset, length; 1515 FT_ULong pos; 1516 FT_Bool is_sfnt_cid; 1517 FT_Byte* sfnt_ps = NULL; 1518 1519 FT_UNUSED( num_params ); 1520 FT_UNUSED( params ); 1521 1522 1523 /* ignore GX stuff */ 1524 if ( face_index > 0 ) 1525 face_index &= 0xFFFFL; 1526 1527 pos = FT_STREAM_POS(); 1528 1529 error = ft_lookup_PS_in_sfnt_stream( stream, 1530 face_index, 1531 &offset, 1532 &length, 1533 &is_sfnt_cid ); 1534 if ( error ) 1535 goto Exit; 1536 1537 if ( offset > stream->size ) 1538 { 1539 FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table offset\n" )); 1540 error = FT_THROW( Invalid_Table ); 1541 goto Exit; 1542 } 1543 else if ( length > stream->size - offset ) 1544 { 1545 FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table length\n" )); 1546 error = FT_THROW( Invalid_Table ); 1547 goto Exit; 1548 } 1549 1550 error = FT_Stream_Seek( stream, pos + offset ); 1551 if ( error ) 1552 goto Exit; 1553 1554 if ( FT_ALLOC( sfnt_ps, (FT_Long)length ) ) 1555 goto Exit; 1556 1557 error = FT_Stream_Read( stream, (FT_Byte *)sfnt_ps, length ); 1558 if ( error ) 1559 { 1560 FT_FREE( sfnt_ps ); 1561 goto Exit; 1562 } 1563 1564 error = open_face_from_buffer( library, 1565 sfnt_ps, 1566 length, 1567 FT_MIN( face_index, 0 ), 1568 is_sfnt_cid ? "cid" : "type1", 1569 aface ); 1570 Exit: 1571 { 1572 FT_Error error1; 1573 1574 1575 if ( FT_ERR_EQ( error, Unknown_File_Format ) ) 1576 { 1577 error1 = FT_Stream_Seek( stream, pos ); 1578 if ( error1 ) 1579 return error1; 1580 } 1581 1582 return error; 1583 } 1584 } 1585 1586 1587 #ifndef FT_MACINTOSH 1588 1589 /* The resource header says we've got resource_cnt `POST' (type1) */ 1590 /* resources in this file. They all need to be coalesced into */ 1591 /* one lump which gets passed on to the type1 driver. */ 1592 /* Here can be only one PostScript font in a file so face_index */ 1593 /* must be 0 (or -1). */ 1594 /* */ 1595 static FT_Error 1596 Mac_Read_POST_Resource( FT_Library library, 1597 FT_Stream stream, 1598 FT_Long *offsets, 1599 FT_Long resource_cnt, 1600 FT_Long face_index, 1601 FT_Face *aface ) 1602 { 1603 FT_Error error = FT_ERR( Cannot_Open_Resource ); 1604 FT_Memory memory = library->memory; 1605 1606 FT_Byte* pfb_data = NULL; 1607 int i, type, flags; 1608 FT_ULong len; 1609 FT_ULong pfb_len, pfb_pos, pfb_lenpos; 1610 FT_ULong rlen, temp; 1611 1612 1613 if ( face_index == -1 ) 1614 face_index = 0; 1615 if ( face_index != 0 ) 1616 return error; 1617 1618 /* Find the length of all the POST resources, concatenated. Assume */ 1619 /* worst case (each resource in its own section). */ 1620 pfb_len = 0; 1621 for ( i = 0; i < resource_cnt; i++ ) 1622 { 1623 error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] ); 1624 if ( error ) 1625 goto Exit; 1626 if ( FT_READ_ULONG( temp ) ) /* actually LONG */ 1627 goto Exit; 1628 1629 /* FT2 allocator takes signed long buffer length, 1630 * too large value causing overflow should be checked 1631 */ 1632 FT_TRACE4(( " POST fragment #%d: length=0x%08x" 1633 " total pfb_len=0x%08x\n", 1634 i, temp, pfb_len + temp + 6 )); 1635 1636 if ( FT_MAC_RFORK_MAX_LEN < temp || 1637 FT_MAC_RFORK_MAX_LEN - temp < pfb_len + 6 ) 1638 { 1639 FT_TRACE2(( " MacOS resource length cannot exceed" 1640 " 0x%08x\n", 1641 FT_MAC_RFORK_MAX_LEN )); 1642 1643 error = FT_THROW( Invalid_Offset ); 1644 goto Exit; 1645 } 1646 1647 pfb_len += temp + 6; 1648 } 1649 1650 FT_TRACE2(( " total buffer size to concatenate" 1651 " %d POST fragments: 0x%08x\n", 1652 resource_cnt, pfb_len + 2 )); 1653 1654 if ( pfb_len + 2 < 6 ) 1655 { 1656 FT_TRACE2(( " too long fragment length makes" 1657 " pfb_len confused: pfb_len=0x%08x\n", 1658 pfb_len )); 1659 1660 error = FT_THROW( Array_Too_Large ); 1661 goto Exit; 1662 } 1663 1664 if ( FT_ALLOC( pfb_data, (FT_Long)pfb_len + 2 ) ) 1665 goto Exit; 1666 1667 pfb_data[0] = 0x80; 1668 pfb_data[1] = 1; /* Ascii section */ 1669 pfb_data[2] = 0; /* 4-byte length, fill in later */ 1670 pfb_data[3] = 0; 1671 pfb_data[4] = 0; 1672 pfb_data[5] = 0; 1673 pfb_pos = 6; 1674 pfb_lenpos = 2; 1675 1676 len = 0; 1677 type = 1; 1678 1679 for ( i = 0; i < resource_cnt; i++ ) 1680 { 1681 error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] ); 1682 if ( error ) 1683 goto Exit2; 1684 if ( FT_READ_ULONG( rlen ) ) 1685 goto Exit2; 1686 1687 /* FT2 allocator takes signed long buffer length, 1688 * too large fragment length causing overflow should be checked 1689 */ 1690 if ( 0x7FFFFFFFUL < rlen ) 1691 { 1692 error = FT_THROW( Invalid_Offset ); 1693 goto Exit2; 1694 } 1695 1696 if ( FT_READ_USHORT( flags ) ) 1697 goto Exit2; 1698 1699 FT_TRACE3(( "POST fragment[%d]:" 1700 " offsets=0x%08x, rlen=0x%08x, flags=0x%04x\n", 1701 i, offsets[i], rlen, flags )); 1702 1703 error = FT_ERR( Array_Too_Large ); 1704 1705 /* postpone the check of `rlen longer than buffer' */ 1706 /* until `FT_Stream_Read' */ 1707 1708 if ( ( flags >> 8 ) == 0 ) /* Comment, should not be loaded */ 1709 { 1710 FT_TRACE3(( " Skip POST fragment #%d because it is a comment\n", 1711 i )); 1712 continue; 1713 } 1714 1715 /* the flags are part of the resource, so rlen >= 2, */ 1716 /* but some fonts declare rlen = 0 for empty fragment */ 1717 if ( rlen > 2 ) 1718 rlen -= 2; 1719 else 1720 rlen = 0; 1721 1722 if ( ( flags >> 8 ) == type ) 1723 len += rlen; 1724 else 1725 { 1726 FT_TRACE3(( " Write POST fragment #%d header (4-byte) to buffer" 1727 " %p + 0x%08x\n", 1728 i, pfb_data, pfb_lenpos )); 1729 1730 if ( pfb_lenpos + 3 > pfb_len + 2 ) 1731 goto Exit2; 1732 1733 pfb_data[pfb_lenpos ] = (FT_Byte)( len ); 1734 pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 ); 1735 pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 ); 1736 pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 ); 1737 1738 if ( ( flags >> 8 ) == 5 ) /* End of font mark */ 1739 break; 1740 1741 FT_TRACE3(( " Write POST fragment #%d header (6-byte) to buffer" 1742 " %p + 0x%08x\n", 1743 i, pfb_data, pfb_pos )); 1744 1745 if ( pfb_pos + 6 > pfb_len + 2 ) 1746 goto Exit2; 1747 1748 pfb_data[pfb_pos++] = 0x80; 1749 1750 type = flags >> 8; 1751 len = rlen; 1752 1753 pfb_data[pfb_pos++] = (FT_Byte)type; 1754 pfb_lenpos = pfb_pos; 1755 pfb_data[pfb_pos++] = 0; /* 4-byte length, fill in later */ 1756 pfb_data[pfb_pos++] = 0; 1757 pfb_data[pfb_pos++] = 0; 1758 pfb_data[pfb_pos++] = 0; 1759 } 1760 1761 if ( pfb_pos > pfb_len || pfb_pos + rlen > pfb_len ) 1762 goto Exit2; 1763 1764 FT_TRACE3(( " Load POST fragment #%d (%d byte) to buffer" 1765 " %p + 0x%08x\n", 1766 i, rlen, pfb_data, pfb_pos )); 1767 1768 error = FT_Stream_Read( stream, (FT_Byte *)pfb_data + pfb_pos, rlen ); 1769 if ( error ) 1770 goto Exit2; 1771 1772 pfb_pos += rlen; 1773 } 1774 1775 error = FT_ERR( Array_Too_Large ); 1776 1777 if ( pfb_pos + 2 > pfb_len + 2 ) 1778 goto Exit2; 1779 pfb_data[pfb_pos++] = 0x80; 1780 pfb_data[pfb_pos++] = 3; 1781 1782 if ( pfb_lenpos + 3 > pfb_len + 2 ) 1783 goto Exit2; 1784 pfb_data[pfb_lenpos ] = (FT_Byte)( len ); 1785 pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 ); 1786 pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 ); 1787 pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 ); 1788 1789 return open_face_from_buffer( library, 1790 pfb_data, 1791 pfb_pos, 1792 face_index, 1793 "type1", 1794 aface ); 1795 1796 Exit2: 1797 if ( FT_ERR_EQ( error, Array_Too_Large ) ) 1798 FT_TRACE2(( " Abort due to too-short buffer to store" 1799 " all POST fragments\n" )); 1800 else if ( FT_ERR_EQ( error, Invalid_Offset ) ) 1801 FT_TRACE2(( " Abort due to invalid offset in a POST fragment\n" )); 1802 1803 if ( error ) 1804 error = FT_ERR( Cannot_Open_Resource ); 1805 FT_FREE( pfb_data ); 1806 1807 Exit: 1808 return error; 1809 } 1810 1811 1812 /* The resource header says we've got resource_cnt `sfnt' */ 1813 /* (TrueType/OpenType) resources in this file. Look through */ 1814 /* them for the one indicated by face_index, load it into mem, */ 1815 /* pass it on to the truetype driver, and return it. */ 1816 /* */ 1817 static FT_Error 1818 Mac_Read_sfnt_Resource( FT_Library library, 1819 FT_Stream stream, 1820 FT_Long *offsets, 1821 FT_Long resource_cnt, 1822 FT_Long face_index, 1823 FT_Face *aface ) 1824 { 1825 FT_Memory memory = library->memory; 1826 FT_Byte* sfnt_data = NULL; 1827 FT_Error error; 1828 FT_ULong flag_offset; 1829 FT_Long rlen; 1830 int is_cff; 1831 FT_Long face_index_in_resource = 0; 1832 1833 1834 if ( face_index < 0 ) 1835 face_index = -face_index - 1; 1836 if ( face_index >= resource_cnt ) 1837 return FT_THROW( Cannot_Open_Resource ); 1838 1839 flag_offset = (FT_ULong)offsets[face_index]; 1840 error = FT_Stream_Seek( stream, flag_offset ); 1841 if ( error ) 1842 goto Exit; 1843 1844 if ( FT_READ_LONG( rlen ) ) 1845 goto Exit; 1846 if ( rlen < 1 ) 1847 return FT_THROW( Cannot_Open_Resource ); 1848 if ( (FT_ULong)rlen > FT_MAC_RFORK_MAX_LEN ) 1849 return FT_THROW( Invalid_Offset ); 1850 1851 error = open_face_PS_from_sfnt_stream( library, 1852 stream, 1853 face_index, 1854 0, NULL, 1855 aface ); 1856 if ( !error ) 1857 goto Exit; 1858 1859 /* rewind sfnt stream before open_face_PS_from_sfnt_stream() */ 1860 error = FT_Stream_Seek( stream, flag_offset + 4 ); 1861 if ( error ) 1862 goto Exit; 1863 1864 if ( FT_ALLOC( sfnt_data, rlen ) ) 1865 return error; 1866 error = FT_Stream_Read( stream, (FT_Byte *)sfnt_data, (FT_ULong)rlen ); 1867 if ( error ) { 1868 FT_FREE( sfnt_data ); 1869 goto Exit; 1870 } 1871 1872 is_cff = rlen > 4 && !ft_memcmp( sfnt_data, "OTTO", 4 ); 1873 error = open_face_from_buffer( library, 1874 sfnt_data, 1875 (FT_ULong)rlen, 1876 face_index_in_resource, 1877 is_cff ? "cff" : "truetype", 1878 aface ); 1879 1880 Exit: 1881 return error; 1882 } 1883 1884 1885 /* Check for a valid resource fork header, or a valid dfont */ 1886 /* header. In a resource fork the first 16 bytes are repeated */ 1887 /* at the location specified by bytes 4-7. In a dfont bytes */ 1888 /* 4-7 point to 16 bytes of zeroes instead. */ 1889 /* */ 1890 static FT_Error 1891 IsMacResource( FT_Library library, 1892 FT_Stream stream, 1893 FT_Long resource_offset, 1894 FT_Long face_index, 1895 FT_Face *aface ) 1896 { 1897 FT_Memory memory = library->memory; 1898 FT_Error error; 1899 FT_Long map_offset, rdata_pos; 1900 FT_Long *data_offsets; 1901 FT_Long count; 1902 1903 1904 error = FT_Raccess_Get_HeaderInfo( library, stream, resource_offset, 1905 &map_offset, &rdata_pos ); 1906 if ( error ) 1907 return error; 1908 1909 /* POST resources must be sorted to concatenate properly */ 1910 error = FT_Raccess_Get_DataOffsets( library, stream, 1911 map_offset, rdata_pos, 1912 TTAG_POST, TRUE, 1913 &data_offsets, &count ); 1914 if ( !error ) 1915 { 1916 error = Mac_Read_POST_Resource( library, stream, data_offsets, count, 1917 face_index, aface ); 1918 FT_FREE( data_offsets ); 1919 /* POST exists in an LWFN providing a single face */ 1920 if ( !error ) 1921 (*aface)->num_faces = 1; 1922 return error; 1923 } 1924 1925 /* sfnt resources should not be sorted to preserve the face order by 1926 QuickDraw API */ 1927 error = FT_Raccess_Get_DataOffsets( library, stream, 1928 map_offset, rdata_pos, 1929 TTAG_sfnt, FALSE, 1930 &data_offsets, &count ); 1931 if ( !error ) 1932 { 1933 FT_Long face_index_internal = face_index % count; 1934 1935 1936 error = Mac_Read_sfnt_Resource( library, stream, data_offsets, count, 1937 face_index_internal, aface ); 1938 FT_FREE( data_offsets ); 1939 if ( !error ) 1940 (*aface)->num_faces = count; 1941 } 1942 1943 return error; 1944 } 1945 1946 1947 /* Check for a valid macbinary header, and if we find one */ 1948 /* check that the (flattened) resource fork in it is valid. */ 1949 /* */ 1950 static FT_Error 1951 IsMacBinary( FT_Library library, 1952 FT_Stream stream, 1953 FT_Long face_index, 1954 FT_Face *aface ) 1955 { 1956 unsigned char header[128]; 1957 FT_Error error; 1958 FT_Long dlen, offset; 1959 1960 1961 if ( !stream ) 1962 return FT_THROW( Invalid_Stream_Operation ); 1963 1964 error = FT_Stream_Seek( stream, 0 ); 1965 if ( error ) 1966 goto Exit; 1967 1968 error = FT_Stream_Read( stream, (FT_Byte*)header, 128 ); 1969 if ( error ) 1970 goto Exit; 1971 1972 if ( header[ 0] != 0 || 1973 header[74] != 0 || 1974 header[82] != 0 || 1975 header[ 1] == 0 || 1976 header[ 1] > 33 || 1977 header[63] != 0 || 1978 header[2 + header[1]] != 0 || 1979 header[0x53] > 0x7F ) 1980 return FT_THROW( Unknown_File_Format ); 1981 1982 dlen = ( header[0x53] << 24 ) | 1983 ( header[0x54] << 16 ) | 1984 ( header[0x55] << 8 ) | 1985 header[0x56]; 1986 #if 0 1987 rlen = ( header[0x57] << 24 ) | 1988 ( header[0x58] << 16 ) | 1989 ( header[0x59] << 8 ) | 1990 header[0x5A]; 1991 #endif /* 0 */ 1992 offset = 128 + ( ( dlen + 127 ) & ~127 ); 1993 1994 return IsMacResource( library, stream, offset, face_index, aface ); 1995 1996 Exit: 1997 return error; 1998 } 1999 2000 2001 static FT_Error 2002 load_face_in_embedded_rfork( FT_Library library, 2003 FT_Stream stream, 2004 FT_Long face_index, 2005 FT_Face *aface, 2006 const FT_Open_Args *args ) 2007 { 2008 2009 #undef FT_COMPONENT 2010 #define FT_COMPONENT trace_raccess 2011 2012 FT_Memory memory = library->memory; 2013 FT_Error error = FT_ERR( Unknown_File_Format ); 2014 FT_UInt i; 2015 2016 char * file_names[FT_RACCESS_N_RULES]; 2017 FT_Long offsets[FT_RACCESS_N_RULES]; 2018 FT_Error errors[FT_RACCESS_N_RULES]; 2019 FT_Bool is_darwin_vfs, vfs_rfork_has_no_font = FALSE; /* not tested */ 2020 2021 FT_Open_Args args2; 2022 FT_Stream stream2 = NULL; 2023 2024 2025 FT_Raccess_Guess( library, stream, 2026 args->pathname, file_names, offsets, errors ); 2027 2028 for ( i = 0; i < FT_RACCESS_N_RULES; i++ ) 2029 { 2030 is_darwin_vfs = ft_raccess_rule_by_darwin_vfs( library, i ); 2031 if ( is_darwin_vfs && vfs_rfork_has_no_font ) 2032 { 2033 FT_TRACE3(( "Skip rule %d: darwin vfs resource fork" 2034 " is already checked and" 2035 " no font is found\n", 2036 i )); 2037 continue; 2038 } 2039 2040 if ( errors[i] ) 2041 { 2042 FT_TRACE3(( "Error 0x%x has occurred in rule %d\n", 2043 errors[i], i )); 2044 continue; 2045 } 2046 2047 args2.flags = FT_OPEN_PATHNAME; 2048 args2.pathname = file_names[i] ? file_names[i] : args->pathname; 2049 2050 FT_TRACE3(( "Try rule %d: %s (offset=%d) ...", 2051 i, args2.pathname, offsets[i] )); 2052 2053 error = FT_Stream_New( library, &args2, &stream2 ); 2054 if ( is_darwin_vfs && FT_ERR_EQ( error, Cannot_Open_Stream ) ) 2055 vfs_rfork_has_no_font = TRUE; 2056 2057 if ( error ) 2058 { 2059 FT_TRACE3(( "failed\n" )); 2060 continue; 2061 } 2062 2063 error = IsMacResource( library, stream2, offsets[i], 2064 face_index, aface ); 2065 FT_Stream_Free( stream2, 0 ); 2066 2067 FT_TRACE3(( "%s\n", error ? "failed": "successful" )); 2068 2069 if ( !error ) 2070 break; 2071 else if ( is_darwin_vfs ) 2072 vfs_rfork_has_no_font = TRUE; 2073 } 2074 2075 for (i = 0; i < FT_RACCESS_N_RULES; i++) 2076 { 2077 if ( file_names[i] ) 2078 FT_FREE( file_names[i] ); 2079 } 2080 2081 /* Caller (load_mac_face) requires FT_Err_Unknown_File_Format. */ 2082 if ( error ) 2083 error = FT_ERR( Unknown_File_Format ); 2084 2085 return error; 2086 2087 #undef FT_COMPONENT 2088 #define FT_COMPONENT trace_objs 2089 2090 } 2091 2092 2093 /* Check for some macintosh formats without Carbon framework. */ 2094 /* Is this a macbinary file? If so look at the resource fork. */ 2095 /* Is this a mac dfont file? */ 2096 /* Is this an old style resource fork? (in data) */ 2097 /* Else call load_face_in_embedded_rfork to try extra rules */ 2098 /* (defined in `ftrfork.c'). */ 2099 /* */ 2100 static FT_Error 2101 load_mac_face( FT_Library library, 2102 FT_Stream stream, 2103 FT_Long face_index, 2104 FT_Face *aface, 2105 const FT_Open_Args *args ) 2106 { 2107 FT_Error error; 2108 FT_UNUSED( args ); 2109 2110 2111 error = IsMacBinary( library, stream, face_index, aface ); 2112 if ( FT_ERR_EQ( error, Unknown_File_Format ) ) 2113 { 2114 2115 #undef FT_COMPONENT 2116 #define FT_COMPONENT trace_raccess 2117 2118 #ifdef FT_DEBUG_LEVEL_TRACE 2119 FT_TRACE3(( "Try as dfont: " )); 2120 if ( !( args->flags & FT_OPEN_MEMORY ) ) 2121 FT_TRACE3(( "%s ...", args->pathname )); 2122 #endif 2123 2124 error = IsMacResource( library, stream, 0, face_index, aface ); 2125 2126 FT_TRACE3(( "%s\n", error ? "failed" : "successful" )); 2127 2128 #undef FT_COMPONENT 2129 #define FT_COMPONENT trace_objs 2130 2131 } 2132 2133 if ( ( FT_ERR_EQ( error, Unknown_File_Format ) || 2134 FT_ERR_EQ( error, Invalid_Stream_Operation ) ) && 2135 ( args->flags & FT_OPEN_PATHNAME ) ) 2136 error = load_face_in_embedded_rfork( library, stream, 2137 face_index, aface, args ); 2138 return error; 2139 } 2140 #endif 2141 2142 #endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */ 2143 2144 2145 /* documentation is in freetype.h */ 2146 2147 FT_EXPORT_DEF( FT_Error ) 2148 FT_Open_Face( FT_Library library, 2149 const FT_Open_Args* args, 2150 FT_Long face_index, 2151 FT_Face *aface ) 2152 { 2153 return ft_open_face_internal( library, args, face_index, aface, 1 ); 2154 } 2155 2156 2157 static FT_Error 2158 ft_open_face_internal( FT_Library library, 2159 const FT_Open_Args* args, 2160 FT_Long face_index, 2161 FT_Face *aface, 2162 FT_Bool test_mac_fonts ) 2163 { 2164 FT_Error error; 2165 FT_Driver driver = NULL; 2166 FT_Memory memory = NULL; 2167 FT_Stream stream = NULL; 2168 FT_Face face = NULL; 2169 FT_ListNode node = NULL; 2170 FT_Bool external_stream; 2171 FT_Module* cur; 2172 FT_Module* limit; 2173 2174 #ifndef FT_CONFIG_OPTION_MAC_FONTS 2175 FT_UNUSED( test_mac_fonts ); 2176 #endif 2177 2178 2179 #ifdef FT_DEBUG_LEVEL_TRACE 2180 FT_TRACE3(( "FT_Open_Face: " )); 2181 if ( face_index < 0 ) 2182 FT_TRACE3(( "Requesting number of faces and named instances\n")); 2183 else 2184 { 2185 FT_TRACE3(( "Requesting face %ld", face_index & 0xFFFFL )); 2186 if ( face_index & 0x7FFF0000L ) 2187 FT_TRACE3(( ", named instance %ld", face_index >> 16 )); 2188 FT_TRACE3(( "\n" )); 2189 } 2190 #endif 2191 2192 /* test for valid `library' delayed to `FT_Stream_New' */ 2193 2194 if ( ( !aface && face_index >= 0 ) || !args ) 2195 return FT_THROW( Invalid_Argument ); 2196 2197 external_stream = FT_BOOL( ( args->flags & FT_OPEN_STREAM ) && 2198 args->stream ); 2199 2200 /* create input stream */ 2201 error = FT_Stream_New( library, args, &stream ); 2202 if ( error ) 2203 goto Fail3; 2204 2205 memory = library->memory; 2206 2207 /* If the font driver is specified in the `args' structure, use */ 2208 /* it. Otherwise, we scan the list of registered drivers. */ 2209 if ( ( args->flags & FT_OPEN_DRIVER ) && args->driver ) 2210 { 2211 driver = FT_DRIVER( args->driver ); 2212 2213 /* not all modules are drivers, so check... */ 2214 if ( FT_MODULE_IS_DRIVER( driver ) ) 2215 { 2216 FT_Int num_params = 0; 2217 FT_Parameter* params = NULL; 2218 2219 2220 if ( args->flags & FT_OPEN_PARAMS ) 2221 { 2222 num_params = args->num_params; 2223 params = args->params; 2224 } 2225 2226 error = open_face( driver, &stream, external_stream, face_index, 2227 num_params, params, &face ); 2228 if ( !error ) 2229 goto Success; 2230 } 2231 else 2232 error = FT_THROW( Invalid_Handle ); 2233 2234 FT_Stream_Free( stream, external_stream ); 2235 goto Fail; 2236 } 2237 else 2238 { 2239 error = FT_ERR( Missing_Module ); 2240 2241 /* check each font driver for an appropriate format */ 2242 cur = library->modules; 2243 limit = cur + library->num_modules; 2244 2245 for ( ; cur < limit; cur++ ) 2246 { 2247 /* not all modules are font drivers, so check... */ 2248 if ( FT_MODULE_IS_DRIVER( cur[0] ) ) 2249 { 2250 FT_Int num_params = 0; 2251 FT_Parameter* params = NULL; 2252 2253 2254 driver = FT_DRIVER( cur[0] ); 2255 2256 if ( args->flags & FT_OPEN_PARAMS ) 2257 { 2258 num_params = args->num_params; 2259 params = args->params; 2260 } 2261 2262 error = open_face( driver, &stream, external_stream, face_index, 2263 num_params, params, &face ); 2264 if ( !error ) 2265 goto Success; 2266 2267 #ifdef FT_CONFIG_OPTION_MAC_FONTS 2268 if ( test_mac_fonts && 2269 ft_strcmp( cur[0]->clazz->module_name, "truetype" ) == 0 && 2270 FT_ERR_EQ( error, Table_Missing ) ) 2271 { 2272 /* TrueType but essential tables are missing */ 2273 error = FT_Stream_Seek( stream, 0 ); 2274 if ( error ) 2275 break; 2276 2277 error = open_face_PS_from_sfnt_stream( library, 2278 stream, 2279 face_index, 2280 num_params, 2281 params, 2282 aface ); 2283 if ( !error ) 2284 { 2285 FT_Stream_Free( stream, external_stream ); 2286 return error; 2287 } 2288 } 2289 #endif 2290 2291 if ( FT_ERR_NEQ( error, Unknown_File_Format ) ) 2292 goto Fail3; 2293 } 2294 } 2295 2296 Fail3: 2297 /* If we are on the mac, and we get an */ 2298 /* FT_Err_Invalid_Stream_Operation it may be because we have an */ 2299 /* empty data fork, so we need to check the resource fork. */ 2300 if ( FT_ERR_NEQ( error, Cannot_Open_Stream ) && 2301 FT_ERR_NEQ( error, Unknown_File_Format ) && 2302 FT_ERR_NEQ( error, Invalid_Stream_Operation ) ) 2303 goto Fail2; 2304 2305 #if !defined( FT_MACINTOSH ) && defined( FT_CONFIG_OPTION_MAC_FONTS ) 2306 if ( test_mac_fonts ) 2307 { 2308 error = load_mac_face( library, stream, face_index, aface, args ); 2309 if ( !error ) 2310 { 2311 /* We don't want to go to Success here. We've already done */ 2312 /* that. On the other hand, if we succeeded we still need to */ 2313 /* close this stream (we opened a different stream which */ 2314 /* extracted the interesting information out of this stream */ 2315 /* here. That stream will still be open and the face will */ 2316 /* point to it). */ 2317 FT_Stream_Free( stream, external_stream ); 2318 return error; 2319 } 2320 } 2321 2322 if ( FT_ERR_NEQ( error, Unknown_File_Format ) ) 2323 goto Fail2; 2324 #endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */ 2325 2326 /* no driver is able to handle this format */ 2327 error = FT_THROW( Unknown_File_Format ); 2328 2329 Fail2: 2330 FT_Stream_Free( stream, external_stream ); 2331 goto Fail; 2332 } 2333 2334 Success: 2335 FT_TRACE4(( "FT_Open_Face: New face object, adding to list\n" )); 2336 2337 /* add the face object to its driver's list */ 2338 if ( FT_NEW( node ) ) 2339 goto Fail; 2340 2341 node->data = face; 2342 /* don't assume driver is the same as face->driver, so use */ 2343 /* face->driver instead. */ 2344 FT_List_Add( &face->driver->faces_list, node ); 2345 2346 /* now allocate a glyph slot object for the face */ 2347 FT_TRACE4(( "FT_Open_Face: Creating glyph slot\n" )); 2348 2349 if ( face_index >= 0 ) 2350 { 2351 error = FT_New_GlyphSlot( face, NULL ); 2352 if ( error ) 2353 goto Fail; 2354 2355 /* finally, allocate a size object for the face */ 2356 { 2357 FT_Size size; 2358 2359 2360 FT_TRACE4(( "FT_Open_Face: Creating size object\n" )); 2361 2362 error = FT_New_Size( face, &size ); 2363 if ( error ) 2364 goto Fail; 2365 2366 face->size = size; 2367 } 2368 } 2369 2370 /* some checks */ 2371 2372 if ( FT_IS_SCALABLE( face ) ) 2373 { 2374 if ( face->height < 0 ) 2375 face->height = (FT_Short)-face->height; 2376 2377 if ( !FT_HAS_VERTICAL( face ) ) 2378 face->max_advance_height = (FT_Short)face->height; 2379 } 2380 2381 if ( FT_HAS_FIXED_SIZES( face ) ) 2382 { 2383 FT_Int i; 2384 2385 2386 for ( i = 0; i < face->num_fixed_sizes; i++ ) 2387 { 2388 FT_Bitmap_Size* bsize = face->available_sizes + i; 2389 2390 2391 if ( bsize->height < 0 ) 2392 bsize->height = -bsize->height; 2393 if ( bsize->x_ppem < 0 ) 2394 bsize->x_ppem = -bsize->x_ppem; 2395 if ( bsize->y_ppem < 0 ) 2396 bsize->y_ppem = -bsize->y_ppem; 2397 2398 /* check whether negation actually has worked */ 2399 if ( bsize->height < 0 || bsize->x_ppem < 0 || bsize->y_ppem < 0 ) 2400 { 2401 FT_TRACE0(( "FT_Open_Face:" 2402 " Invalid bitmap dimensions for stroke %d," 2403 " now disabled\n", i )); 2404 bsize->width = 0; 2405 bsize->height = 0; 2406 bsize->size = 0; 2407 bsize->x_ppem = 0; 2408 bsize->y_ppem = 0; 2409 } 2410 } 2411 } 2412 2413 /* initialize internal face data */ 2414 { 2415 FT_Face_Internal internal = face->internal; 2416 2417 2418 internal->transform_matrix.xx = 0x10000L; 2419 internal->transform_matrix.xy = 0; 2420 internal->transform_matrix.yx = 0; 2421 internal->transform_matrix.yy = 0x10000L; 2422 2423 internal->transform_delta.x = 0; 2424 internal->transform_delta.y = 0; 2425 2426 internal->refcount = 1; 2427 } 2428 2429 if ( aface ) 2430 *aface = face; 2431 else 2432 FT_Done_Face( face ); 2433 2434 goto Exit; 2435 2436 Fail: 2437 if ( node ) 2438 FT_Done_Face( face ); /* face must be in the driver's list */ 2439 else if ( face ) 2440 destroy_face( memory, face, driver ); 2441 2442 Exit: 2443 #ifdef FT_DEBUG_LEVEL_TRACE 2444 if ( !error && face_index < 0 ) 2445 { 2446 FT_TRACE3(( "FT_Open_Face: The font has %ld face%s\n" 2447 " and %ld named instance%s for face %ld\n", 2448 face->num_faces, 2449 face->num_faces == 1 ? "" : "s", 2450 face->style_flags >> 16, 2451 ( face->style_flags >> 16 ) == 1 ? "" : "s", 2452 -face_index - 1 )); 2453 } 2454 #endif 2455 2456 FT_TRACE4(( "FT_Open_Face: Return 0x%x\n", error )); 2457 2458 return error; 2459 } 2460 2461 2462 /* documentation is in freetype.h */ 2463 2464 FT_EXPORT_DEF( FT_Error ) 2465 FT_Attach_File( FT_Face face, 2466 const char* filepathname ) 2467 { 2468 FT_Open_Args open; 2469 2470 2471 /* test for valid `face' delayed to `FT_Attach_Stream' */ 2472 2473 if ( !filepathname ) 2474 return FT_THROW( Invalid_Argument ); 2475 2476 open.stream = NULL; 2477 open.flags = FT_OPEN_PATHNAME; 2478 open.pathname = (char*)filepathname; 2479 2480 return FT_Attach_Stream( face, &open ); 2481 } 2482 2483 2484 /* documentation is in freetype.h */ 2485 2486 FT_EXPORT_DEF( FT_Error ) 2487 FT_Attach_Stream( FT_Face face, 2488 FT_Open_Args* parameters ) 2489 { 2490 FT_Stream stream; 2491 FT_Error error; 2492 FT_Driver driver; 2493 2494 FT_Driver_Class clazz; 2495 2496 2497 /* test for valid `parameters' delayed to `FT_Stream_New' */ 2498 2499 if ( !face ) 2500 return FT_THROW( Invalid_Face_Handle ); 2501 2502 driver = face->driver; 2503 if ( !driver ) 2504 return FT_THROW( Invalid_Driver_Handle ); 2505 2506 error = FT_Stream_New( driver->root.library, parameters, &stream ); 2507 if ( error ) 2508 goto Exit; 2509 2510 /* we implement FT_Attach_Stream in each driver through the */ 2511 /* `attach_file' interface */ 2512 2513 error = FT_ERR( Unimplemented_Feature ); 2514 clazz = driver->clazz; 2515 if ( clazz->attach_file ) 2516 error = clazz->attach_file( face, stream ); 2517 2518 /* close the attached stream */ 2519 FT_Stream_Free( stream, 2520 (FT_Bool)( parameters->stream && 2521 ( parameters->flags & FT_OPEN_STREAM ) ) ); 2522 2523 Exit: 2524 return error; 2525 } 2526 2527 2528 /* documentation is in freetype.h */ 2529 2530 FT_EXPORT_DEF( FT_Error ) 2531 FT_Reference_Face( FT_Face face ) 2532 { 2533 if ( !face ) 2534 return FT_THROW( Invalid_Face_Handle ); 2535 2536 face->internal->refcount++; 2537 2538 return FT_Err_Ok; 2539 } 2540 2541 2542 /* documentation is in freetype.h */ 2543 2544 FT_EXPORT_DEF( FT_Error ) 2545 FT_Done_Face( FT_Face face ) 2546 { 2547 FT_Error error; 2548 FT_Driver driver; 2549 FT_Memory memory; 2550 FT_ListNode node; 2551 2552 2553 error = FT_ERR( Invalid_Face_Handle ); 2554 if ( face && face->driver ) 2555 { 2556 face->internal->refcount--; 2557 if ( face->internal->refcount > 0 ) 2558 error = FT_Err_Ok; 2559 else 2560 { 2561 driver = face->driver; 2562 memory = driver->root.memory; 2563 2564 /* find face in driver's list */ 2565 node = FT_List_Find( &driver->faces_list, face ); 2566 if ( node ) 2567 { 2568 /* remove face object from the driver's list */ 2569 FT_List_Remove( &driver->faces_list, node ); 2570 FT_FREE( node ); 2571 2572 /* now destroy the object proper */ 2573 destroy_face( memory, face, driver ); 2574 error = FT_Err_Ok; 2575 } 2576 } 2577 } 2578 2579 return error; 2580 } 2581 2582 2583 /* documentation is in ftobjs.h */ 2584 2585 FT_EXPORT_DEF( FT_Error ) 2586 FT_New_Size( FT_Face face, 2587 FT_Size *asize ) 2588 { 2589 FT_Error error; 2590 FT_Memory memory; 2591 FT_Driver driver; 2592 FT_Driver_Class clazz; 2593 2594 FT_Size size = NULL; 2595 FT_ListNode node = NULL; 2596 2597 2598 if ( !face ) 2599 return FT_THROW( Invalid_Face_Handle ); 2600 2601 if ( !asize ) 2602 return FT_THROW( Invalid_Argument ); 2603 2604 if ( !face->driver ) 2605 return FT_THROW( Invalid_Driver_Handle ); 2606 2607 *asize = NULL; 2608 2609 driver = face->driver; 2610 clazz = driver->clazz; 2611 memory = face->memory; 2612 2613 /* Allocate new size object and perform basic initialisation */ 2614 if ( FT_ALLOC( size, clazz->size_object_size ) || FT_NEW( node ) ) 2615 goto Exit; 2616 2617 size->face = face; 2618 2619 /* for now, do not use any internal fields in size objects */ 2620 size->internal = NULL; 2621 2622 if ( clazz->init_size ) 2623 error = clazz->init_size( size ); 2624 2625 /* in case of success, add to the face's list */ 2626 if ( !error ) 2627 { 2628 *asize = size; 2629 node->data = size; 2630 FT_List_Add( &face->sizes_list, node ); 2631 } 2632 2633 Exit: 2634 if ( error ) 2635 { 2636 FT_FREE( node ); 2637 FT_FREE( size ); 2638 } 2639 2640 return error; 2641 } 2642 2643 2644 /* documentation is in ftobjs.h */ 2645 2646 FT_EXPORT_DEF( FT_Error ) 2647 FT_Done_Size( FT_Size size ) 2648 { 2649 FT_Error error; 2650 FT_Driver driver; 2651 FT_Memory memory; 2652 FT_Face face; 2653 FT_ListNode node; 2654 2655 2656 if ( !size ) 2657 return FT_THROW( Invalid_Size_Handle ); 2658 2659 face = size->face; 2660 if ( !face ) 2661 return FT_THROW( Invalid_Face_Handle ); 2662 2663 driver = face->driver; 2664 if ( !driver ) 2665 return FT_THROW( Invalid_Driver_Handle ); 2666 2667 memory = driver->root.memory; 2668 2669 error = FT_Err_Ok; 2670 node = FT_List_Find( &face->sizes_list, size ); 2671 if ( node ) 2672 { 2673 FT_List_Remove( &face->sizes_list, node ); 2674 FT_FREE( node ); 2675 2676 if ( face->size == size ) 2677 { 2678 face->size = NULL; 2679 if ( face->sizes_list.head ) 2680 face->size = (FT_Size)(face->sizes_list.head->data); 2681 } 2682 2683 destroy_size( memory, size, driver ); 2684 } 2685 else 2686 error = FT_THROW( Invalid_Size_Handle ); 2687 2688 return error; 2689 } 2690 2691 2692 /* documentation is in ftobjs.h */ 2693 2694 FT_BASE_DEF( FT_Error ) 2695 FT_Match_Size( FT_Face face, 2696 FT_Size_Request req, 2697 FT_Bool ignore_width, 2698 FT_ULong* size_index ) 2699 { 2700 FT_Int i; 2701 FT_Long w, h; 2702 2703 2704 if ( !FT_HAS_FIXED_SIZES( face ) ) 2705 return FT_THROW( Invalid_Face_Handle ); 2706 2707 /* FT_Bitmap_Size doesn't provide enough info... */ 2708 if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL ) 2709 return FT_THROW( Unimplemented_Feature ); 2710 2711 w = FT_REQUEST_WIDTH ( req ); 2712 h = FT_REQUEST_HEIGHT( req ); 2713 2714 if ( req->width && !req->height ) 2715 h = w; 2716 else if ( !req->width && req->height ) 2717 w = h; 2718 2719 w = FT_PIX_ROUND( w ); 2720 h = FT_PIX_ROUND( h ); 2721 2722 if ( !w || !h ) 2723 return FT_THROW( Invalid_Pixel_Size ); 2724 2725 for ( i = 0; i < face->num_fixed_sizes; i++ ) 2726 { 2727 FT_Bitmap_Size* bsize = face->available_sizes + i; 2728 2729 2730 if ( h != FT_PIX_ROUND( bsize->y_ppem ) ) 2731 continue; 2732 2733 if ( w == FT_PIX_ROUND( bsize->x_ppem ) || ignore_width ) 2734 { 2735 FT_TRACE3(( "FT_Match_Size: bitmap strike %d matches\n", i )); 2736 2737 if ( size_index ) 2738 *size_index = (FT_ULong)i; 2739 2740 return FT_Err_Ok; 2741 } 2742 } 2743 2744 FT_TRACE3(( "FT_Match_Size: no matching bitmap strike\n" )); 2745 2746 return FT_THROW( Invalid_Pixel_Size ); 2747 } 2748 2749 2750 /* documentation is in ftobjs.h */ 2751 2752 FT_BASE_DEF( void ) 2753 ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics, 2754 FT_Pos advance ) 2755 { 2756 FT_Pos height = metrics->height; 2757 2758 2759 /* compensate for glyph with bbox above/below the baseline */ 2760 if ( metrics->horiBearingY < 0 ) 2761 { 2762 if ( height < metrics->horiBearingY ) 2763 height = metrics->horiBearingY; 2764 } 2765 else if ( metrics->horiBearingY > 0 ) 2766 height -= metrics->horiBearingY; 2767 2768 /* the factor 1.2 is a heuristical value */ 2769 if ( !advance ) 2770 advance = height * 12 / 10; 2771 2772 metrics->vertBearingX = metrics->horiBearingX - metrics->horiAdvance / 2; 2773 metrics->vertBearingY = ( advance - height ) / 2; 2774 metrics->vertAdvance = advance; 2775 } 2776 2777 2778 static void 2779 ft_recompute_scaled_metrics( FT_Face face, 2780 FT_Size_Metrics* metrics ) 2781 { 2782 /* Compute root ascender, descender, test height, and max_advance */ 2783 2784 #ifdef GRID_FIT_METRICS 2785 metrics->ascender = FT_PIX_CEIL( FT_MulFix( face->ascender, 2786 metrics->y_scale ) ); 2787 2788 metrics->descender = FT_PIX_FLOOR( FT_MulFix( face->descender, 2789 metrics->y_scale ) ); 2790 2791 metrics->height = FT_PIX_ROUND( FT_MulFix( face->height, 2792 metrics->y_scale ) ); 2793 2794 metrics->max_advance = FT_PIX_ROUND( FT_MulFix( face->max_advance_width, 2795 metrics->x_scale ) ); 2796 #else /* !GRID_FIT_METRICS */ 2797 metrics->ascender = FT_MulFix( face->ascender, 2798 metrics->y_scale ); 2799 2800 metrics->descender = FT_MulFix( face->descender, 2801 metrics->y_scale ); 2802 2803 metrics->height = FT_MulFix( face->height, 2804 metrics->y_scale ); 2805 2806 metrics->max_advance = FT_MulFix( face->max_advance_width, 2807 metrics->x_scale ); 2808 #endif /* !GRID_FIT_METRICS */ 2809 } 2810 2811 2812 FT_BASE_DEF( void ) 2813 FT_Select_Metrics( FT_Face face, 2814 FT_ULong strike_index ) 2815 { 2816 FT_Size_Metrics* metrics; 2817 FT_Bitmap_Size* bsize; 2818 2819 2820 metrics = &face->size->metrics; 2821 bsize = face->available_sizes + strike_index; 2822 2823 metrics->x_ppem = (FT_UShort)( ( bsize->x_ppem + 32 ) >> 6 ); 2824 metrics->y_ppem = (FT_UShort)( ( bsize->y_ppem + 32 ) >> 6 ); 2825 2826 if ( FT_IS_SCALABLE( face ) ) 2827 { 2828 metrics->x_scale = FT_DivFix( bsize->x_ppem, 2829 face->units_per_EM ); 2830 metrics->y_scale = FT_DivFix( bsize->y_ppem, 2831 face->units_per_EM ); 2832 2833 ft_recompute_scaled_metrics( face, metrics ); 2834 } 2835 else 2836 { 2837 metrics->x_scale = 1L << 16; 2838 metrics->y_scale = 1L << 16; 2839 metrics->ascender = bsize->y_ppem; 2840 metrics->descender = 0; 2841 metrics->height = bsize->height << 6; 2842 metrics->max_advance = bsize->x_ppem; 2843 } 2844 2845 FT_TRACE5(( "FT_Select_Metrics:\n" )); 2846 FT_TRACE5(( " x scale: %d (%f)\n", 2847 metrics->x_scale, metrics->x_scale / 65536.0 )); 2848 FT_TRACE5(( " y scale: %d (%f)\n", 2849 metrics->y_scale, metrics->y_scale / 65536.0 )); 2850 FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); 2851 FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); 2852 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 2853 FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); 2854 FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); 2855 FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); 2856 } 2857 2858 2859 FT_BASE_DEF( void ) 2860 FT_Request_Metrics( FT_Face face, 2861 FT_Size_Request req ) 2862 { 2863 FT_Size_Metrics* metrics; 2864 2865 2866 metrics = &face->size->metrics; 2867 2868 if ( FT_IS_SCALABLE( face ) ) 2869 { 2870 FT_Long w = 0, h = 0, scaled_w = 0, scaled_h = 0; 2871 2872 2873 switch ( req->type ) 2874 { 2875 case FT_SIZE_REQUEST_TYPE_NOMINAL: 2876 w = h = face->units_per_EM; 2877 break; 2878 2879 case FT_SIZE_REQUEST_TYPE_REAL_DIM: 2880 w = h = face->ascender - face->descender; 2881 break; 2882 2883 case FT_SIZE_REQUEST_TYPE_BBOX: 2884 w = face->bbox.xMax - face->bbox.xMin; 2885 h = face->bbox.yMax - face->bbox.yMin; 2886 break; 2887 2888 case FT_SIZE_REQUEST_TYPE_CELL: 2889 w = face->max_advance_width; 2890 h = face->ascender - face->descender; 2891 break; 2892 2893 case FT_SIZE_REQUEST_TYPE_SCALES: 2894 metrics->x_scale = (FT_Fixed)req->width; 2895 metrics->y_scale = (FT_Fixed)req->height; 2896 if ( !metrics->x_scale ) 2897 metrics->x_scale = metrics->y_scale; 2898 else if ( !metrics->y_scale ) 2899 metrics->y_scale = metrics->x_scale; 2900 goto Calculate_Ppem; 2901 2902 case FT_SIZE_REQUEST_TYPE_MAX: 2903 break; 2904 } 2905 2906 /* to be on the safe side */ 2907 if ( w < 0 ) 2908 w = -w; 2909 2910 if ( h < 0 ) 2911 h = -h; 2912 2913 scaled_w = FT_REQUEST_WIDTH ( req ); 2914 scaled_h = FT_REQUEST_HEIGHT( req ); 2915 2916 /* determine scales */ 2917 if ( req->width ) 2918 { 2919 metrics->x_scale = FT_DivFix( scaled_w, w ); 2920 2921 if ( req->height ) 2922 { 2923 metrics->y_scale = FT_DivFix( scaled_h, h ); 2924 2925 if ( req->type == FT_SIZE_REQUEST_TYPE_CELL ) 2926 { 2927 if ( metrics->y_scale > metrics->x_scale ) 2928 metrics->y_scale = metrics->x_scale; 2929 else 2930 metrics->x_scale = metrics->y_scale; 2931 } 2932 } 2933 else 2934 { 2935 metrics->y_scale = metrics->x_scale; 2936 scaled_h = FT_MulDiv( scaled_w, h, w ); 2937 } 2938 } 2939 else 2940 { 2941 metrics->x_scale = metrics->y_scale = FT_DivFix( scaled_h, h ); 2942 scaled_w = FT_MulDiv( scaled_h, w, h ); 2943 } 2944 2945 Calculate_Ppem: 2946 /* calculate the ppems */ 2947 if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL ) 2948 { 2949 scaled_w = FT_MulFix( face->units_per_EM, metrics->x_scale ); 2950 scaled_h = FT_MulFix( face->units_per_EM, metrics->y_scale ); 2951 } 2952 2953 metrics->x_ppem = (FT_UShort)( ( scaled_w + 32 ) >> 6 ); 2954 metrics->y_ppem = (FT_UShort)( ( scaled_h + 32 ) >> 6 ); 2955 2956 ft_recompute_scaled_metrics( face, metrics ); 2957 } 2958 else 2959 { 2960 FT_ZERO( metrics ); 2961 metrics->x_scale = 1L << 16; 2962 metrics->y_scale = 1L << 16; 2963 } 2964 2965 FT_TRACE5(( "FT_Request_Metrics:\n" )); 2966 FT_TRACE5(( " x scale: %d (%f)\n", 2967 metrics->x_scale, metrics->x_scale / 65536.0 )); 2968 FT_TRACE5(( " y scale: %d (%f)\n", 2969 metrics->y_scale, metrics->y_scale / 65536.0 )); 2970 FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); 2971 FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); 2972 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 2973 FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); 2974 FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); 2975 FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); 2976 } 2977 2978 2979 /* documentation is in freetype.h */ 2980 2981 FT_EXPORT_DEF( FT_Error ) 2982 FT_Select_Size( FT_Face face, 2983 FT_Int strike_index ) 2984 { 2985 FT_Driver_Class clazz; 2986 2987 2988 if ( !face || !FT_HAS_FIXED_SIZES( face ) ) 2989 return FT_THROW( Invalid_Face_Handle ); 2990 2991 if ( strike_index < 0 || strike_index >= face->num_fixed_sizes ) 2992 return FT_THROW( Invalid_Argument ); 2993 2994 clazz = face->driver->clazz; 2995 2996 if ( clazz->select_size ) 2997 { 2998 FT_Error error; 2999 3000 3001 error = clazz->select_size( face->size, (FT_ULong)strike_index ); 3002 3003 #ifdef FT_DEBUG_LEVEL_TRACE 3004 { 3005 FT_Size_Metrics* metrics = &face->size->metrics; 3006 3007 3008 FT_TRACE5(( "FT_Select_Size (font driver's `select_size'):\n" )); 3009 FT_TRACE5(( " x scale: %d (%f)\n", 3010 metrics->x_scale, metrics->x_scale / 65536.0 )); 3011 FT_TRACE5(( " y scale: %d (%f)\n", 3012 metrics->y_scale, metrics->y_scale / 65536.0 )); 3013 FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); 3014 FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); 3015 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 3016 FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); 3017 FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); 3018 FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); 3019 } 3020 #endif 3021 3022 return error; 3023 } 3024 3025 FT_Select_Metrics( face, (FT_ULong)strike_index ); 3026 3027 return FT_Err_Ok; 3028 } 3029 3030 3031 /* documentation is in freetype.h */ 3032 3033 FT_EXPORT_DEF( FT_Error ) 3034 FT_Request_Size( FT_Face face, 3035 FT_Size_Request req ) 3036 { 3037 FT_Driver_Class clazz; 3038 FT_ULong strike_index; 3039 3040 3041 if ( !face ) 3042 return FT_THROW( Invalid_Face_Handle ); 3043 3044 if ( !req || req->width < 0 || req->height < 0 || 3045 req->type >= FT_SIZE_REQUEST_TYPE_MAX ) 3046 return FT_THROW( Invalid_Argument ); 3047 3048 clazz = face->driver->clazz; 3049 3050 if ( clazz->request_size ) 3051 { 3052 FT_Error error; 3053 3054 3055 error = clazz->request_size( face->size, req ); 3056 3057 #ifdef FT_DEBUG_LEVEL_TRACE 3058 { 3059 FT_Size_Metrics* metrics = &face->size->metrics; 3060 3061 3062 FT_TRACE5(( "FT_Request_Size (font driver's `request_size'):\n" )); 3063 FT_TRACE5(( " x scale: %d (%f)\n", 3064 metrics->x_scale, metrics->x_scale / 65536.0 )); 3065 FT_TRACE5(( " y scale: %d (%f)\n", 3066 metrics->y_scale, metrics->y_scale / 65536.0 )); 3067 FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); 3068 FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); 3069 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 3070 FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); 3071 FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); 3072 FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); 3073 } 3074 #endif 3075 3076 return error; 3077 } 3078 3079 /* 3080 * The reason that a driver doesn't have `request_size' defined is 3081 * either that the scaling here suffices or that the supported formats 3082 * are bitmap-only and size matching is not implemented. 3083 * 3084 * In the latter case, a simple size matching is done. 3085 */ 3086 if ( !FT_IS_SCALABLE( face ) && FT_HAS_FIXED_SIZES( face ) ) 3087 { 3088 FT_Error error; 3089 3090 3091 error = FT_Match_Size( face, req, 0, &strike_index ); 3092 if ( error ) 3093 return error; 3094 3095 return FT_Select_Size( face, (FT_Int)strike_index ); 3096 } 3097 3098 FT_Request_Metrics( face, req ); 3099 3100 return FT_Err_Ok; 3101 } 3102 3103 3104 /* documentation is in freetype.h */ 3105 3106 FT_EXPORT_DEF( FT_Error ) 3107 FT_Set_Char_Size( FT_Face face, 3108 FT_F26Dot6 char_width, 3109 FT_F26Dot6 char_height, 3110 FT_UInt horz_resolution, 3111 FT_UInt vert_resolution ) 3112 { 3113 FT_Size_RequestRec req; 3114 3115 3116 /* check of `face' delayed to `FT_Request_Size' */ 3117 3118 if ( !char_width ) 3119 char_width = char_height; 3120 else if ( !char_height ) 3121 char_height = char_width; 3122 3123 if ( !horz_resolution ) 3124 horz_resolution = vert_resolution; 3125 else if ( !vert_resolution ) 3126 vert_resolution = horz_resolution; 3127 3128 if ( char_width < 1 * 64 ) 3129 char_width = 1 * 64; 3130 if ( char_height < 1 * 64 ) 3131 char_height = 1 * 64; 3132 3133 if ( !horz_resolution ) 3134 horz_resolution = vert_resolution = 72; 3135 3136 req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; 3137 req.width = char_width; 3138 req.height = char_height; 3139 req.horiResolution = horz_resolution; 3140 req.vertResolution = vert_resolution; 3141 3142 return FT_Request_Size( face, &req ); 3143 } 3144 3145 3146 /* documentation is in freetype.h */ 3147 3148 FT_EXPORT_DEF( FT_Error ) 3149 FT_Set_Pixel_Sizes( FT_Face face, 3150 FT_UInt pixel_width, 3151 FT_UInt pixel_height ) 3152 { 3153 FT_Size_RequestRec req; 3154 3155 3156 /* check of `face' delayed to `FT_Request_Size' */ 3157 3158 if ( pixel_width == 0 ) 3159 pixel_width = pixel_height; 3160 else if ( pixel_height == 0 ) 3161 pixel_height = pixel_width; 3162 3163 if ( pixel_width < 1 ) 3164 pixel_width = 1; 3165 if ( pixel_height < 1 ) 3166 pixel_height = 1; 3167 3168 /* use `>=' to avoid potential compiler warning on 16bit platforms */ 3169 if ( pixel_width >= 0xFFFFU ) 3170 pixel_width = 0xFFFFU; 3171 if ( pixel_height >= 0xFFFFU ) 3172 pixel_height = 0xFFFFU; 3173 3174 req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; 3175 req.width = (FT_Long)( pixel_width << 6 ); 3176 req.height = (FT_Long)( pixel_height << 6 ); 3177 req.horiResolution = 0; 3178 req.vertResolution = 0; 3179 3180 return FT_Request_Size( face, &req ); 3181 } 3182 3183 3184 /* documentation is in freetype.h */ 3185 3186 FT_EXPORT_DEF( FT_Error ) 3187 FT_Get_Kerning( FT_Face face, 3188 FT_UInt left_glyph, 3189 FT_UInt right_glyph, 3190 FT_UInt kern_mode, 3191 FT_Vector *akerning ) 3192 { 3193 FT_Error error = FT_Err_Ok; 3194 FT_Driver driver; 3195 3196 3197 if ( !face ) 3198 return FT_THROW( Invalid_Face_Handle ); 3199 3200 if ( !akerning ) 3201 return FT_THROW( Invalid_Argument ); 3202 3203 driver = face->driver; 3204 3205 akerning->x = 0; 3206 akerning->y = 0; 3207 3208 if ( driver->clazz->get_kerning ) 3209 { 3210 error = driver->clazz->get_kerning( face, 3211 left_glyph, 3212 right_glyph, 3213 akerning ); 3214 if ( !error ) 3215 { 3216 if ( kern_mode != FT_KERNING_UNSCALED ) 3217 { 3218 akerning->x = FT_MulFix( akerning->x, face->size->metrics.x_scale ); 3219 akerning->y = FT_MulFix( akerning->y, face->size->metrics.y_scale ); 3220 3221 if ( kern_mode != FT_KERNING_UNFITTED ) 3222 { 3223 FT_Pos orig_x = akerning->x; 3224 FT_Pos orig_y = akerning->y; 3225 3226 3227 /* we scale down kerning values for small ppem values */ 3228 /* to avoid that rounding makes them too big. */ 3229 /* `25' has been determined heuristically. */ 3230 if ( face->size->metrics.x_ppem < 25 ) 3231 akerning->x = FT_MulDiv( orig_x, 3232 face->size->metrics.x_ppem, 25 ); 3233 if ( face->size->metrics.y_ppem < 25 ) 3234 akerning->y = FT_MulDiv( orig_y, 3235 face->size->metrics.y_ppem, 25 ); 3236 3237 akerning->x = FT_PIX_ROUND( akerning->x ); 3238 akerning->y = FT_PIX_ROUND( akerning->y ); 3239 3240 #ifdef FT_DEBUG_LEVEL_TRACE 3241 { 3242 FT_Pos orig_x_rounded = FT_PIX_ROUND( orig_x ); 3243 FT_Pos orig_y_rounded = FT_PIX_ROUND( orig_y ); 3244 3245 3246 if ( akerning->x != orig_x_rounded || 3247 akerning->y != orig_y_rounded ) 3248 FT_TRACE5(( "FT_Get_Kerning: horizontal kerning" 3249 " (%d, %d) scaled down to (%d, %d) pixels\n", 3250 orig_x_rounded / 64, orig_y_rounded / 64, 3251 akerning->x / 64, akerning->y / 64 )); 3252 } 3253 #endif 3254 } 3255 } 3256 } 3257 } 3258 3259 return error; 3260 } 3261 3262 3263 /* documentation is in freetype.h */ 3264 3265 FT_EXPORT_DEF( FT_Error ) 3266 FT_Get_Track_Kerning( FT_Face face, 3267 FT_Fixed point_size, 3268 FT_Int degree, 3269 FT_Fixed* akerning ) 3270 { 3271 FT_Service_Kerning service; 3272 FT_Error error = FT_Err_Ok; 3273 3274 3275 if ( !face ) 3276 return FT_THROW( Invalid_Face_Handle ); 3277 3278 if ( !akerning ) 3279 return FT_THROW( Invalid_Argument ); 3280 3281 FT_FACE_FIND_SERVICE( face, service, KERNING ); 3282 if ( !service ) 3283 return FT_THROW( Unimplemented_Feature ); 3284 3285 error = service->get_track( face, 3286 point_size, 3287 degree, 3288 akerning ); 3289 3290 return error; 3291 } 3292 3293 3294 /* documentation is in freetype.h */ 3295 3296 FT_EXPORT_DEF( FT_Error ) 3297 FT_Select_Charmap( FT_Face face, 3298 FT_Encoding encoding ) 3299 { 3300 FT_CharMap* cur; 3301 FT_CharMap* limit; 3302 3303 3304 if ( !face ) 3305 return FT_THROW( Invalid_Face_Handle ); 3306 3307 if ( encoding == FT_ENCODING_NONE ) 3308 return FT_THROW( Invalid_Argument ); 3309 3310 /* FT_ENCODING_UNICODE is special. We try to find the `best' Unicode */ 3311 /* charmap available, i.e., one with UCS-4 characters, if possible. */ 3312 /* */ 3313 /* This is done by find_unicode_charmap() above, to share code. */ 3314 if ( encoding == FT_ENCODING_UNICODE ) 3315 return find_unicode_charmap( face ); 3316 3317 cur = face->charmaps; 3318 if ( !cur ) 3319 return FT_THROW( Invalid_CharMap_Handle ); 3320 3321 limit = cur + face->num_charmaps; 3322 3323 for ( ; cur < limit; cur++ ) 3324 { 3325 if ( cur[0]->encoding == encoding ) 3326 { 3327 face->charmap = cur[0]; 3328 return 0; 3329 } 3330 } 3331 3332 return FT_THROW( Invalid_Argument ); 3333 } 3334 3335 3336 /* documentation is in freetype.h */ 3337 3338 FT_EXPORT_DEF( FT_Error ) 3339 FT_Set_Charmap( FT_Face face, 3340 FT_CharMap charmap ) 3341 { 3342 FT_CharMap* cur; 3343 FT_CharMap* limit; 3344 3345 3346 if ( !face ) 3347 return FT_THROW( Invalid_Face_Handle ); 3348 3349 cur = face->charmaps; 3350 if ( !cur || !charmap ) 3351 return FT_THROW( Invalid_CharMap_Handle ); 3352 3353 if ( FT_Get_CMap_Format( charmap ) == 14 ) 3354 return FT_THROW( Invalid_Argument ); 3355 3356 limit = cur + face->num_charmaps; 3357 3358 for ( ; cur < limit; cur++ ) 3359 { 3360 if ( cur[0] == charmap ) 3361 { 3362 face->charmap = cur[0]; 3363 return FT_Err_Ok; 3364 } 3365 } 3366 3367 return FT_THROW( Invalid_Argument ); 3368 } 3369 3370 3371 /* documentation is in freetype.h */ 3372 3373 FT_EXPORT_DEF( FT_Int ) 3374 FT_Get_Charmap_Index( FT_CharMap charmap ) 3375 { 3376 FT_Int i; 3377 3378 3379 if ( !charmap || !charmap->face ) 3380 return -1; 3381 3382 for ( i = 0; i < charmap->face->num_charmaps; i++ ) 3383 if ( charmap->face->charmaps[i] == charmap ) 3384 break; 3385 3386 FT_ASSERT( i < charmap->face->num_charmaps ); 3387 3388 return i; 3389 } 3390 3391 3392 static void 3393 ft_cmap_done_internal( FT_CMap cmap ) 3394 { 3395 FT_CMap_Class clazz = cmap->clazz; 3396 FT_Face face = cmap->charmap.face; 3397 FT_Memory memory = FT_FACE_MEMORY( face ); 3398 3399 3400 if ( clazz->done ) 3401 clazz->done( cmap ); 3402 3403 FT_FREE( cmap ); 3404 } 3405 3406 3407 FT_BASE_DEF( void ) 3408 FT_CMap_Done( FT_CMap cmap ) 3409 { 3410 if ( cmap ) 3411 { 3412 FT_Face face = cmap->charmap.face; 3413 FT_Memory memory = FT_FACE_MEMORY( face ); 3414 FT_Error error; 3415 FT_Int i, j; 3416 3417 3418 for ( i = 0; i < face->num_charmaps; i++ ) 3419 { 3420 if ( (FT_CMap)face->charmaps[i] == cmap ) 3421 { 3422 FT_CharMap last_charmap = face->charmaps[face->num_charmaps - 1]; 3423 3424 3425 if ( FT_RENEW_ARRAY( face->charmaps, 3426 face->num_charmaps, 3427 face->num_charmaps - 1 ) ) 3428 return; 3429 3430 /* remove it from our list of charmaps */ 3431 for ( j = i + 1; j < face->num_charmaps; j++ ) 3432 { 3433 if ( j == face->num_charmaps - 1 ) 3434 face->charmaps[j - 1] = last_charmap; 3435 else 3436 face->charmaps[j - 1] = face->charmaps[j]; 3437 } 3438 3439 face->num_charmaps--; 3440 3441 if ( (FT_CMap)face->charmap == cmap ) 3442 face->charmap = NULL; 3443 3444 ft_cmap_done_internal( cmap ); 3445 3446 break; 3447 } 3448 } 3449 } 3450 } 3451 3452 3453 FT_BASE_DEF( FT_Error ) 3454 FT_CMap_New( FT_CMap_Class clazz, 3455 FT_Pointer init_data, 3456 FT_CharMap charmap, 3457 FT_CMap *acmap ) 3458 { 3459 FT_Error error = FT_Err_Ok; 3460 FT_Face face; 3461 FT_Memory memory; 3462 FT_CMap cmap = NULL; 3463 3464 3465 if ( !clazz || !charmap || !charmap->face ) 3466 return FT_THROW( Invalid_Argument ); 3467 3468 face = charmap->face; 3469 memory = FT_FACE_MEMORY( face ); 3470 3471 if ( !FT_ALLOC( cmap, clazz->size ) ) 3472 { 3473 cmap->charmap = *charmap; 3474 cmap->clazz = clazz; 3475 3476 if ( clazz->init ) 3477 { 3478 error = clazz->init( cmap, init_data ); 3479 if ( error ) 3480 goto Fail; 3481 } 3482 3483 /* add it to our list of charmaps */ 3484 if ( FT_RENEW_ARRAY( face->charmaps, 3485 face->num_charmaps, 3486 face->num_charmaps + 1 ) ) 3487 goto Fail; 3488 3489 face->charmaps[face->num_charmaps++] = (FT_CharMap)cmap; 3490 } 3491 3492 Exit: 3493 if ( acmap ) 3494 *acmap = cmap; 3495 3496 return error; 3497 3498 Fail: 3499 ft_cmap_done_internal( cmap ); 3500 cmap = NULL; 3501 goto Exit; 3502 } 3503 3504 3505 /* documentation is in freetype.h */ 3506 3507 FT_EXPORT_DEF( FT_UInt ) 3508 FT_Get_Char_Index( FT_Face face, 3509 FT_ULong charcode ) 3510 { 3511 FT_UInt result = 0; 3512 3513 3514 if ( face && face->charmap ) 3515 { 3516 FT_CMap cmap = FT_CMAP( face->charmap ); 3517 3518 3519 if ( charcode > 0xFFFFFFFFUL ) 3520 { 3521 FT_TRACE1(( "FT_Get_Char_Index: too large charcode" )); 3522 FT_TRACE1(( " 0x%x is truncated\n", charcode )); 3523 } 3524 3525 result = cmap->clazz->char_index( cmap, (FT_UInt32)charcode ); 3526 if ( result >= (FT_UInt)face->num_glyphs ) 3527 result = 0; 3528 } 3529 3530 return result; 3531 } 3532 3533 3534 /* documentation is in freetype.h */ 3535 3536 FT_EXPORT_DEF( FT_ULong ) 3537 FT_Get_First_Char( FT_Face face, 3538 FT_UInt *agindex ) 3539 { 3540 FT_ULong result = 0; 3541 FT_UInt gindex = 0; 3542 3543 3544 /* only do something if we have a charmap, and we have glyphs at all */ 3545 if ( face && face->charmap && face->num_glyphs ) 3546 { 3547 gindex = FT_Get_Char_Index( face, 0 ); 3548 if ( gindex == 0 ) 3549 result = FT_Get_Next_Char( face, 0, &gindex ); 3550 } 3551 3552 if ( agindex ) 3553 *agindex = gindex; 3554 3555 return result; 3556 } 3557 3558 3559 /* documentation is in freetype.h */ 3560 3561 FT_EXPORT_DEF( FT_ULong ) 3562 FT_Get_Next_Char( FT_Face face, 3563 FT_ULong charcode, 3564 FT_UInt *agindex ) 3565 { 3566 FT_ULong result = 0; 3567 FT_UInt gindex = 0; 3568 3569 3570 if ( face && face->charmap && face->num_glyphs ) 3571 { 3572 FT_UInt32 code = (FT_UInt32)charcode; 3573 FT_CMap cmap = FT_CMAP( face->charmap ); 3574 3575 3576 do 3577 { 3578 gindex = cmap->clazz->char_next( cmap, &code ); 3579 3580 } while ( gindex >= (FT_UInt)face->num_glyphs ); 3581 3582 result = ( gindex == 0 ) ? 0 : code; 3583 } 3584 3585 if ( agindex ) 3586 *agindex = gindex; 3587 3588 return result; 3589 } 3590 3591 3592 /* documentation is in freetype.h */ 3593 3594 FT_EXPORT_DEF( FT_UInt ) 3595 FT_Face_GetCharVariantIndex( FT_Face face, 3596 FT_ULong charcode, 3597 FT_ULong variantSelector ) 3598 { 3599 FT_UInt result = 0; 3600 3601 3602 if ( face && 3603 face->charmap && 3604 face->charmap->encoding == FT_ENCODING_UNICODE ) 3605 { 3606 FT_CharMap charmap = find_variant_selector_charmap( face ); 3607 FT_CMap ucmap = FT_CMAP( face->charmap ); 3608 3609 3610 if ( charmap ) 3611 { 3612 FT_CMap vcmap = FT_CMAP( charmap ); 3613 3614 3615 if ( charcode > 0xFFFFFFFFUL ) 3616 { 3617 FT_TRACE1(( "FT_Get_Char_Index: too large charcode" )); 3618 FT_TRACE1(( " 0x%x is truncated\n", charcode )); 3619 } 3620 if ( variantSelector > 0xFFFFFFFFUL ) 3621 { 3622 FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" )); 3623 FT_TRACE1(( " 0x%x is truncated\n", variantSelector )); 3624 } 3625 3626 result = vcmap->clazz->char_var_index( vcmap, ucmap, 3627 (FT_UInt32)charcode, 3628 (FT_UInt32)variantSelector ); 3629 } 3630 } 3631 3632 return result; 3633 } 3634 3635 3636 /* documentation is in freetype.h */ 3637 3638 FT_EXPORT_DEF( FT_Int ) 3639 FT_Face_GetCharVariantIsDefault( FT_Face face, 3640 FT_ULong charcode, 3641 FT_ULong variantSelector ) 3642 { 3643 FT_Int result = -1; 3644 3645 3646 if ( face ) 3647 { 3648 FT_CharMap charmap = find_variant_selector_charmap( face ); 3649 3650 3651 if ( charmap ) 3652 { 3653 FT_CMap vcmap = FT_CMAP( charmap ); 3654 3655 3656 if ( charcode > 0xFFFFFFFFUL ) 3657 { 3658 FT_TRACE1(( "FT_Get_Char_Index: too large charcode" )); 3659 FT_TRACE1(( " 0x%x is truncated\n", charcode )); 3660 } 3661 if ( variantSelector > 0xFFFFFFFFUL ) 3662 { 3663 FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" )); 3664 FT_TRACE1(( " 0x%x is truncated\n", variantSelector )); 3665 } 3666 3667 result = vcmap->clazz->char_var_default( vcmap, 3668 (FT_UInt32)charcode, 3669 (FT_UInt32)variantSelector ); 3670 } 3671 } 3672 3673 return result; 3674 } 3675 3676 3677 /* documentation is in freetype.h */ 3678 3679 FT_EXPORT_DEF( FT_UInt32* ) 3680 FT_Face_GetVariantSelectors( FT_Face face ) 3681 { 3682 FT_UInt32 *result = NULL; 3683 3684 3685 if ( face ) 3686 { 3687 FT_CharMap charmap = find_variant_selector_charmap( face ); 3688 3689 3690 if ( charmap ) 3691 { 3692 FT_CMap vcmap = FT_CMAP( charmap ); 3693 FT_Memory memory = FT_FACE_MEMORY( face ); 3694 3695 3696 result = vcmap->clazz->variant_list( vcmap, memory ); 3697 } 3698 } 3699 3700 return result; 3701 } 3702 3703 3704 /* documentation is in freetype.h */ 3705 3706 FT_EXPORT_DEF( FT_UInt32* ) 3707 FT_Face_GetVariantsOfChar( FT_Face face, 3708 FT_ULong charcode ) 3709 { 3710 FT_UInt32 *result = NULL; 3711 3712 3713 if ( face ) 3714 { 3715 FT_CharMap charmap = find_variant_selector_charmap( face ); 3716 3717 3718 if ( charmap ) 3719 { 3720 FT_CMap vcmap = FT_CMAP( charmap ); 3721 FT_Memory memory = FT_FACE_MEMORY( face ); 3722 3723 3724 if ( charcode > 0xFFFFFFFFUL ) 3725 { 3726 FT_TRACE1(( "FT_Get_Char_Index: too large charcode" )); 3727 FT_TRACE1(( " 0x%x is truncated\n", charcode )); 3728 } 3729 3730 result = vcmap->clazz->charvariant_list( vcmap, memory, 3731 (FT_UInt32)charcode ); 3732 } 3733 } 3734 return result; 3735 } 3736 3737 3738 /* documentation is in freetype.h */ 3739 3740 FT_EXPORT_DEF( FT_UInt32* ) 3741 FT_Face_GetCharsOfVariant( FT_Face face, 3742 FT_ULong variantSelector ) 3743 { 3744 FT_UInt32 *result = NULL; 3745 3746 3747 if ( face ) 3748 { 3749 FT_CharMap charmap = find_variant_selector_charmap( face ); 3750 3751 3752 if ( charmap ) 3753 { 3754 FT_CMap vcmap = FT_CMAP( charmap ); 3755 FT_Memory memory = FT_FACE_MEMORY( face ); 3756 3757 3758 if ( variantSelector > 0xFFFFFFFFUL ) 3759 { 3760 FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" )); 3761 FT_TRACE1(( " 0x%x is truncated\n", variantSelector )); 3762 } 3763 3764 result = vcmap->clazz->variantchar_list( vcmap, memory, 3765 (FT_UInt32)variantSelector ); 3766 } 3767 } 3768 3769 return result; 3770 } 3771 3772 3773 /* documentation is in freetype.h */ 3774 3775 FT_EXPORT_DEF( FT_UInt ) 3776 FT_Get_Name_Index( FT_Face face, 3777 FT_String* glyph_name ) 3778 { 3779 FT_UInt result = 0; 3780 3781 3782 if ( face && 3783 FT_HAS_GLYPH_NAMES( face ) && 3784 glyph_name ) 3785 { 3786 FT_Service_GlyphDict service; 3787 3788 3789 FT_FACE_LOOKUP_SERVICE( face, 3790 service, 3791 GLYPH_DICT ); 3792 3793 if ( service && service->name_index ) 3794 result = service->name_index( face, glyph_name ); 3795 } 3796 3797 return result; 3798 } 3799 3800 3801 /* documentation is in freetype.h */ 3802 3803 FT_EXPORT_DEF( FT_Error ) 3804 FT_Get_Glyph_Name( FT_Face face, 3805 FT_UInt glyph_index, 3806 FT_Pointer buffer, 3807 FT_UInt buffer_max ) 3808 { 3809 FT_Error error; 3810 FT_Service_GlyphDict service; 3811 3812 3813 if ( !face ) 3814 return FT_THROW( Invalid_Face_Handle ); 3815 3816 if ( !buffer || buffer_max == 0 ) 3817 return FT_THROW( Invalid_Argument ); 3818 3819 /* clean up buffer */ 3820 ((FT_Byte*)buffer)[0] = '\0'; 3821 3822 if ( (FT_Long)glyph_index >= face->num_glyphs ) 3823 return FT_THROW( Invalid_Glyph_Index ); 3824 3825 if ( !FT_HAS_GLYPH_NAMES( face ) ) 3826 return FT_THROW( Invalid_Argument ); 3827 3828 FT_FACE_LOOKUP_SERVICE( face, service, GLYPH_DICT ); 3829 if ( service && service->get_name ) 3830 error = service->get_name( face, glyph_index, buffer, buffer_max ); 3831 else 3832 error = FT_THROW( Invalid_Argument ); 3833 3834 return error; 3835 } 3836 3837 3838 /* documentation is in freetype.h */ 3839 3840 FT_EXPORT_DEF( const char* ) 3841 FT_Get_Postscript_Name( FT_Face face ) 3842 { 3843 const char* result = NULL; 3844 3845 3846 if ( !face ) 3847 goto Exit; 3848 3849 if ( !result ) 3850 { 3851 FT_Service_PsFontName service; 3852 3853 3854 FT_FACE_LOOKUP_SERVICE( face, 3855 service, 3856 POSTSCRIPT_FONT_NAME ); 3857 3858 if ( service && service->get_ps_font_name ) 3859 result = service->get_ps_font_name( face ); 3860 } 3861 3862 Exit: 3863 return result; 3864 } 3865 3866 3867 /* documentation is in tttables.h */ 3868 3869 FT_EXPORT_DEF( void* ) 3870 FT_Get_Sfnt_Table( FT_Face face, 3871 FT_Sfnt_Tag tag ) 3872 { 3873 void* table = NULL; 3874 FT_Service_SFNT_Table service; 3875 3876 3877 if ( face && FT_IS_SFNT( face ) ) 3878 { 3879 FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); 3880 if ( service ) 3881 table = service->get_table( face, tag ); 3882 } 3883 3884 return table; 3885 } 3886 3887 3888 /* documentation is in tttables.h */ 3889 3890 FT_EXPORT_DEF( FT_Error ) 3891 FT_Load_Sfnt_Table( FT_Face face, 3892 FT_ULong tag, 3893 FT_Long offset, 3894 FT_Byte* buffer, 3895 FT_ULong* length ) 3896 { 3897 FT_Service_SFNT_Table service; 3898 3899 3900 if ( !face || !FT_IS_SFNT( face ) ) 3901 return FT_THROW( Invalid_Face_Handle ); 3902 3903 FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); 3904 if ( !service ) 3905 return FT_THROW( Unimplemented_Feature ); 3906 3907 return service->load_table( face, tag, offset, buffer, length ); 3908 } 3909 3910 3911 /* documentation is in tttables.h */ 3912 3913 FT_EXPORT_DEF( FT_Error ) 3914 FT_Sfnt_Table_Info( FT_Face face, 3915 FT_UInt table_index, 3916 FT_ULong *tag, 3917 FT_ULong *length ) 3918 { 3919 FT_Service_SFNT_Table service; 3920 FT_ULong offset; 3921 3922 3923 /* test for valid `length' delayed to `service->table_info' */ 3924 3925 if ( !face || !FT_IS_SFNT( face ) ) 3926 return FT_THROW( Invalid_Face_Handle ); 3927 3928 FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); 3929 if ( !service ) 3930 return FT_THROW( Unimplemented_Feature ); 3931 3932 return service->table_info( face, table_index, tag, &offset, length ); 3933 } 3934 3935 3936 /* documentation is in tttables.h */ 3937 3938 FT_EXPORT_DEF( FT_ULong ) 3939 FT_Get_CMap_Language_ID( FT_CharMap charmap ) 3940 { 3941 FT_Service_TTCMaps service; 3942 FT_Face face; 3943 TT_CMapInfo cmap_info; 3944 3945 3946 if ( !charmap || !charmap->face ) 3947 return 0; 3948 3949 face = charmap->face; 3950 FT_FACE_FIND_SERVICE( face, service, TT_CMAP ); 3951 if ( !service ) 3952 return 0; 3953 if ( service->get_cmap_info( charmap, &cmap_info )) 3954 return 0; 3955 3956 return cmap_info.language; 3957 } 3958 3959 3960 /* documentation is in tttables.h */ 3961 3962 FT_EXPORT_DEF( FT_Long ) 3963 FT_Get_CMap_Format( FT_CharMap charmap ) 3964 { 3965 FT_Service_TTCMaps service; 3966 FT_Face face; 3967 TT_CMapInfo cmap_info; 3968 3969 3970 if ( !charmap || !charmap->face ) 3971 return -1; 3972 3973 face = charmap->face; 3974 FT_FACE_FIND_SERVICE( face, service, TT_CMAP ); 3975 if ( !service ) 3976 return -1; 3977 if ( service->get_cmap_info( charmap, &cmap_info )) 3978 return -1; 3979 3980 return cmap_info.format; 3981 } 3982 3983 3984 /* documentation is in ftsizes.h */ 3985 3986 FT_EXPORT_DEF( FT_Error ) 3987 FT_Activate_Size( FT_Size size ) 3988 { 3989 FT_Face face; 3990 3991 3992 if ( !size ) 3993 return FT_THROW( Invalid_Size_Handle ); 3994 3995 face = size->face; 3996 if ( !face || !face->driver ) 3997 return FT_THROW( Invalid_Face_Handle ); 3998 3999 /* we don't need anything more complex than that; all size objects */ 4000 /* are already listed by the face */ 4001 face->size = size; 4002 4003 return FT_Err_Ok; 4004 } 4005 4006 4007 /*************************************************************************/ 4008 /*************************************************************************/ 4009 /*************************************************************************/ 4010 /**** ****/ 4011 /**** ****/ 4012 /**** R E N D E R E R S ****/ 4013 /**** ****/ 4014 /**** ****/ 4015 /*************************************************************************/ 4016 /*************************************************************************/ 4017 /*************************************************************************/ 4018 4019 /* lookup a renderer by glyph format in the library's list */ 4020 FT_BASE_DEF( FT_Renderer ) 4021 FT_Lookup_Renderer( FT_Library library, 4022 FT_Glyph_Format format, 4023 FT_ListNode* node ) 4024 { 4025 FT_ListNode cur; 4026 FT_Renderer result = NULL; 4027 4028 4029 if ( !library ) 4030 goto Exit; 4031 4032 cur = library->renderers.head; 4033 4034 if ( node ) 4035 { 4036 if ( *node ) 4037 cur = (*node)->next; 4038 *node = NULL; 4039 } 4040 4041 while ( cur ) 4042 { 4043 FT_Renderer renderer = FT_RENDERER( cur->data ); 4044 4045 4046 if ( renderer->glyph_format == format ) 4047 { 4048 if ( node ) 4049 *node = cur; 4050 4051 result = renderer; 4052 break; 4053 } 4054 cur = cur->next; 4055 } 4056 4057 Exit: 4058 return result; 4059 } 4060 4061 4062 static FT_Renderer 4063 ft_lookup_glyph_renderer( FT_GlyphSlot slot ) 4064 { 4065 FT_Face face = slot->face; 4066 FT_Library library = FT_FACE_LIBRARY( face ); 4067 FT_Renderer result = library->cur_renderer; 4068 4069 4070 if ( !result || result->glyph_format != slot->format ) 4071 result = FT_Lookup_Renderer( library, slot->format, 0 ); 4072 4073 return result; 4074 } 4075 4076 4077 static void 4078 ft_set_current_renderer( FT_Library library ) 4079 { 4080 FT_Renderer renderer; 4081 4082 4083 renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE, 0 ); 4084 library->cur_renderer = renderer; 4085 } 4086 4087 4088 static FT_Error 4089 ft_add_renderer( FT_Module module ) 4090 { 4091 FT_Library library = module->library; 4092 FT_Memory memory = library->memory; 4093 FT_Error error; 4094 FT_ListNode node = NULL; 4095 4096 4097 if ( FT_NEW( node ) ) 4098 goto Exit; 4099 4100 { 4101 FT_Renderer render = FT_RENDERER( module ); 4102 FT_Renderer_Class* clazz = (FT_Renderer_Class*)module->clazz; 4103 4104 4105 render->clazz = clazz; 4106 render->glyph_format = clazz->glyph_format; 4107 4108 /* allocate raster object if needed */ 4109 if ( clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && 4110 clazz->raster_class->raster_new ) 4111 { 4112 error = clazz->raster_class->raster_new( memory, &render->raster ); 4113 if ( error ) 4114 goto Fail; 4115 4116 render->raster_render = clazz->raster_class->raster_render; 4117 render->render = clazz->render_glyph; 4118 } 4119 4120 /* add to list */ 4121 node->data = module; 4122 FT_List_Add( &library->renderers, node ); 4123 4124 ft_set_current_renderer( library ); 4125 } 4126 4127 Fail: 4128 if ( error ) 4129 FT_FREE( node ); 4130 4131 Exit: 4132 return error; 4133 } 4134 4135 4136 static void 4137 ft_remove_renderer( FT_Module module ) 4138 { 4139 FT_Library library; 4140 FT_Memory memory; 4141 FT_ListNode node; 4142 4143 4144 library = module->library; 4145 if ( !library ) 4146 return; 4147 4148 memory = library->memory; 4149 4150 node = FT_List_Find( &library->renderers, module ); 4151 if ( node ) 4152 { 4153 FT_Renderer render = FT_RENDERER( module ); 4154 4155 4156 /* release raster object, if any */ 4157 if ( render->clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && 4158 render->raster ) 4159 render->clazz->raster_class->raster_done( render->raster ); 4160 4161 /* remove from list */ 4162 FT_List_Remove( &library->renderers, node ); 4163 FT_FREE( node ); 4164 4165 ft_set_current_renderer( library ); 4166 } 4167 } 4168 4169 4170 /* documentation is in ftrender.h */ 4171 4172 FT_EXPORT_DEF( FT_Renderer ) 4173 FT_Get_Renderer( FT_Library library, 4174 FT_Glyph_Format format ) 4175 { 4176 /* test for valid `library' delayed to `FT_Lookup_Renderer' */ 4177 4178 return FT_Lookup_Renderer( library, format, 0 ); 4179 } 4180 4181 4182 /* documentation is in ftrender.h */ 4183 4184 FT_EXPORT_DEF( FT_Error ) 4185 FT_Set_Renderer( FT_Library library, 4186 FT_Renderer renderer, 4187 FT_UInt num_params, 4188 FT_Parameter* parameters ) 4189 { 4190 FT_ListNode node; 4191 FT_Error error = FT_Err_Ok; 4192 4193 FT_Renderer_SetModeFunc set_mode; 4194 4195 4196 if ( !library ) 4197 { 4198 error = FT_THROW( Invalid_Library_Handle ); 4199 goto Exit; 4200 } 4201 4202 if ( !renderer ) 4203 { 4204 error = FT_THROW( Invalid_Argument ); 4205 goto Exit; 4206 } 4207 4208 if ( num_params > 0 && !parameters ) 4209 { 4210 error = FT_THROW( Invalid_Argument ); 4211 goto Exit; 4212 } 4213 4214 node = FT_List_Find( &library->renderers, renderer ); 4215 if ( !node ) 4216 { 4217 error = FT_THROW( Invalid_Argument ); 4218 goto Exit; 4219 } 4220 4221 FT_List_Up( &library->renderers, node ); 4222 4223 if ( renderer->glyph_format == FT_GLYPH_FORMAT_OUTLINE ) 4224 library->cur_renderer = renderer; 4225 4226 set_mode = renderer->clazz->set_mode; 4227 4228 for ( ; num_params > 0; num_params-- ) 4229 { 4230 error = set_mode( renderer, parameters->tag, parameters->data ); 4231 if ( error ) 4232 break; 4233 parameters++; 4234 } 4235 4236 Exit: 4237 return error; 4238 } 4239 4240 4241 FT_BASE_DEF( FT_Error ) 4242 FT_Render_Glyph_Internal( FT_Library library, 4243 FT_GlyphSlot slot, 4244 FT_Render_Mode render_mode ) 4245 { 4246 FT_Error error = FT_Err_Ok; 4247 FT_Renderer renderer; 4248 4249 4250 /* if it is already a bitmap, no need to do anything */ 4251 switch ( slot->format ) 4252 { 4253 case FT_GLYPH_FORMAT_BITMAP: /* already a bitmap, don't do anything */ 4254 break; 4255 4256 default: 4257 { 4258 FT_ListNode node = NULL; 4259 4260 4261 /* small shortcut for the very common case */ 4262 if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) 4263 { 4264 renderer = library->cur_renderer; 4265 node = library->renderers.head; 4266 } 4267 else 4268 renderer = FT_Lookup_Renderer( library, slot->format, &node ); 4269 4270 error = FT_ERR( Unimplemented_Feature ); 4271 while ( renderer ) 4272 { 4273 error = renderer->render( renderer, slot, render_mode, NULL ); 4274 if ( !error || 4275 FT_ERR_NEQ( error, Cannot_Render_Glyph ) ) 4276 break; 4277 4278 /* FT_Err_Cannot_Render_Glyph is returned if the render mode */ 4279 /* is unsupported by the current renderer for this glyph image */ 4280 /* format. */ 4281 4282 /* now, look for another renderer that supports the same */ 4283 /* format. */ 4284 renderer = FT_Lookup_Renderer( library, slot->format, &node ); 4285 } 4286 } 4287 } 4288 4289 #ifdef FT_DEBUG_LEVEL_TRACE 4290 4291 #undef FT_COMPONENT 4292 #define FT_COMPONENT trace_bitmap 4293 4294 /* 4295 * Computing the MD5 checksum is expensive, unnecessarily distorting a 4296 * possible profiling of FreeType if compiled with tracing support. For 4297 * this reason, we execute the following code only if explicitly 4298 * requested. 4299 */ 4300 4301 /* we use FT_TRACE3 in this block */ 4302 if ( ft_trace_levels[trace_bitmap] >= 3 ) 4303 { 4304 /* we convert to a single bitmap format for computing the checksum */ 4305 if ( !error && slot->bitmap.buffer ) 4306 { 4307 FT_Bitmap bitmap; 4308 FT_Error err; 4309 4310 4311 FT_Bitmap_Init( &bitmap ); 4312 4313 /* this also converts the bitmap flow to `down' (i.e., pitch > 0) */ 4314 err = FT_Bitmap_Convert( library, &slot->bitmap, &bitmap, 1 ); 4315 if ( !err ) 4316 { 4317 MD5_CTX ctx; 4318 unsigned char md5[16]; 4319 int i; 4320 unsigned int rows = bitmap.rows; 4321 unsigned int pitch = (unsigned int)bitmap.pitch; 4322 4323 4324 MD5_Init( &ctx ); 4325 if ( bitmap.buffer ) 4326 MD5_Update( &ctx, bitmap.buffer, rows * pitch ); 4327 MD5_Final( md5, &ctx ); 4328 4329 FT_TRACE3(( "MD5 checksum for %dx%d bitmap:\n" 4330 " ", 4331 rows, pitch )); 4332 for ( i = 0; i < 16; i++ ) 4333 FT_TRACE3(( "%02X", md5[i] )); 4334 FT_TRACE3(( "\n" )); 4335 } 4336 4337 FT_Bitmap_Done( library, &bitmap ); 4338 } 4339 } 4340 4341 #undef FT_COMPONENT 4342 #define FT_COMPONENT trace_objs 4343 4344 #endif /* FT_DEBUG_LEVEL_TRACE */ 4345 4346 return error; 4347 } 4348 4349 4350 /* documentation is in freetype.h */ 4351 4352 FT_EXPORT_DEF( FT_Error ) 4353 FT_Render_Glyph( FT_GlyphSlot slot, 4354 FT_Render_Mode render_mode ) 4355 { 4356 FT_Library library; 4357 4358 4359 if ( !slot || !slot->face ) 4360 return FT_THROW( Invalid_Argument ); 4361 4362 library = FT_FACE_LIBRARY( slot->face ); 4363 4364 return FT_Render_Glyph_Internal( library, slot, render_mode ); 4365 } 4366 4367 4368 /*************************************************************************/ 4369 /*************************************************************************/ 4370 /*************************************************************************/ 4371 /**** ****/ 4372 /**** ****/ 4373 /**** M O D U L E S ****/ 4374 /**** ****/ 4375 /**** ****/ 4376 /*************************************************************************/ 4377 /*************************************************************************/ 4378 /*************************************************************************/ 4379 4380 4381 /*************************************************************************/ 4382 /* */ 4383 /* <Function> */ 4384 /* Destroy_Module */ 4385 /* */ 4386 /* <Description> */ 4387 /* Destroys a given module object. For drivers, this also destroys */ 4388 /* all child faces. */ 4389 /* */ 4390 /* <InOut> */ 4391 /* module :: A handle to the target driver object. */ 4392 /* */ 4393 /* <Note> */ 4394 /* The driver _must_ be LOCKED! */ 4395 /* */ 4396 static void 4397 Destroy_Module( FT_Module module ) 4398 { 4399 FT_Memory memory = module->memory; 4400 FT_Module_Class* clazz = module->clazz; 4401 FT_Library library = module->library; 4402 4403 4404 if ( library && library->auto_hinter == module ) 4405 library->auto_hinter = NULL; 4406 4407 /* if the module is a renderer */ 4408 if ( FT_MODULE_IS_RENDERER( module ) ) 4409 ft_remove_renderer( module ); 4410 4411 /* if the module is a font driver, add some steps */ 4412 if ( FT_MODULE_IS_DRIVER( module ) ) 4413 Destroy_Driver( FT_DRIVER( module ) ); 4414 4415 /* finalize the module object */ 4416 if ( clazz->module_done ) 4417 clazz->module_done( module ); 4418 4419 /* discard it */ 4420 FT_FREE( module ); 4421 } 4422 4423 4424 /* documentation is in ftmodapi.h */ 4425 4426 FT_EXPORT_DEF( FT_Error ) 4427 FT_Add_Module( FT_Library library, 4428 const FT_Module_Class* clazz ) 4429 { 4430 FT_Error error; 4431 FT_Memory memory; 4432 FT_Module module = NULL; 4433 FT_UInt nn; 4434 4435 4436 #define FREETYPE_VER_FIXED ( ( (FT_Long)FREETYPE_MAJOR << 16 ) | \ 4437 FREETYPE_MINOR ) 4438 4439 if ( !library ) 4440 return FT_THROW( Invalid_Library_Handle ); 4441 4442 if ( !clazz ) 4443 return FT_THROW( Invalid_Argument ); 4444 4445 /* check freetype version */ 4446 if ( clazz->module_requires > FREETYPE_VER_FIXED ) 4447 return FT_THROW( Invalid_Version ); 4448 4449 /* look for a module with the same name in the library's table */ 4450 for ( nn = 0; nn < library->num_modules; nn++ ) 4451 { 4452 module = library->modules[nn]; 4453 if ( ft_strcmp( module->clazz->module_name, clazz->module_name ) == 0 ) 4454 { 4455 /* this installed module has the same name, compare their versions */ 4456 if ( clazz->module_version <= module->clazz->module_version ) 4457 return FT_THROW( Lower_Module_Version ); 4458 4459 /* remove the module from our list, then exit the loop to replace */ 4460 /* it by our new version.. */ 4461 FT_Remove_Module( library, module ); 4462 break; 4463 } 4464 } 4465 4466 memory = library->memory; 4467 error = FT_Err_Ok; 4468 4469 if ( library->num_modules >= FT_MAX_MODULES ) 4470 { 4471 error = FT_THROW( Too_Many_Drivers ); 4472 goto Exit; 4473 } 4474 4475 /* allocate module object */ 4476 if ( FT_ALLOC( module, clazz->module_size ) ) 4477 goto Exit; 4478 4479 /* base initialization */ 4480 module->library = library; 4481 module->memory = memory; 4482 module->clazz = (FT_Module_Class*)clazz; 4483 4484 /* check whether the module is a renderer - this must be performed */ 4485 /* before the normal module initialization */ 4486 if ( FT_MODULE_IS_RENDERER( module ) ) 4487 { 4488 /* add to the renderers list */ 4489 error = ft_add_renderer( module ); 4490 if ( error ) 4491 goto Fail; 4492 } 4493 4494 /* is the module a auto-hinter? */ 4495 if ( FT_MODULE_IS_HINTER( module ) ) 4496 library->auto_hinter = module; 4497 4498 /* if the module is a font driver */ 4499 if ( FT_MODULE_IS_DRIVER( module ) ) 4500 { 4501 FT_Driver driver = FT_DRIVER( module ); 4502 4503 4504 driver->clazz = (FT_Driver_Class)module->clazz; 4505 } 4506 4507 if ( clazz->module_init ) 4508 { 4509 error = clazz->module_init( module ); 4510 if ( error ) 4511 goto Fail; 4512 } 4513 4514 /* add module to the library's table */ 4515 library->modules[library->num_modules++] = module; 4516 4517 Exit: 4518 return error; 4519 4520 Fail: 4521 if ( FT_MODULE_IS_RENDERER( module ) ) 4522 { 4523 FT_Renderer renderer = FT_RENDERER( module ); 4524 4525 4526 if ( renderer->clazz && 4527 renderer->clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && 4528 renderer->raster ) 4529 renderer->clazz->raster_class->raster_done( renderer->raster ); 4530 } 4531 4532 FT_FREE( module ); 4533 goto Exit; 4534 } 4535 4536 4537 /* documentation is in ftmodapi.h */ 4538 4539 FT_EXPORT_DEF( FT_Module ) 4540 FT_Get_Module( FT_Library library, 4541 const char* module_name ) 4542 { 4543 FT_Module result = NULL; 4544 FT_Module* cur; 4545 FT_Module* limit; 4546 4547 4548 if ( !library || !module_name ) 4549 return result; 4550 4551 cur = library->modules; 4552 limit = cur + library->num_modules; 4553 4554 for ( ; cur < limit; cur++ ) 4555 if ( ft_strcmp( cur[0]->clazz->module_name, module_name ) == 0 ) 4556 { 4557 result = cur[0]; 4558 break; 4559 } 4560 4561 return result; 4562 } 4563 4564 4565 /* documentation is in ftobjs.h */ 4566 4567 FT_BASE_DEF( const void* ) 4568 FT_Get_Module_Interface( FT_Library library, 4569 const char* mod_name ) 4570 { 4571 FT_Module module; 4572 4573 4574 /* test for valid `library' delayed to FT_Get_Module() */ 4575 4576 module = FT_Get_Module( library, mod_name ); 4577 4578 return module ? module->clazz->module_interface : 0; 4579 } 4580 4581 4582 FT_BASE_DEF( FT_Pointer ) 4583 ft_module_get_service( FT_Module module, 4584 const char* service_id, 4585 FT_Bool global ) 4586 { 4587 FT_Pointer result = NULL; 4588 4589 4590 if ( module ) 4591 { 4592 FT_ASSERT( module->clazz && module->clazz->get_interface ); 4593 4594 /* first, look for the service in the module */ 4595 if ( module->clazz->get_interface ) 4596 result = module->clazz->get_interface( module, service_id ); 4597 4598 if ( global && !result ) 4599 { 4600 /* we didn't find it, look in all other modules then */ 4601 FT_Library library = module->library; 4602 FT_Module* cur = library->modules; 4603 FT_Module* limit = cur + library->num_modules; 4604 4605 4606 for ( ; cur < limit; cur++ ) 4607 { 4608 if ( cur[0] != module ) 4609 { 4610 FT_ASSERT( cur[0]->clazz ); 4611 4612 if ( cur[0]->clazz->get_interface ) 4613 { 4614 result = cur[0]->clazz->get_interface( cur[0], service_id ); 4615 if ( result ) 4616 break; 4617 } 4618 } 4619 } 4620 } 4621 } 4622 4623 return result; 4624 } 4625 4626 4627 /* documentation is in ftmodapi.h */ 4628 4629 FT_EXPORT_DEF( FT_Error ) 4630 FT_Remove_Module( FT_Library library, 4631 FT_Module module ) 4632 { 4633 /* try to find the module from the table, then remove it from there */ 4634 4635 if ( !library ) 4636 return FT_THROW( Invalid_Library_Handle ); 4637 4638 if ( module ) 4639 { 4640 FT_Module* cur = library->modules; 4641 FT_Module* limit = cur + library->num_modules; 4642 4643 4644 for ( ; cur < limit; cur++ ) 4645 { 4646 if ( cur[0] == module ) 4647 { 4648 /* remove it from the table */ 4649 library->num_modules--; 4650 limit--; 4651 while ( cur < limit ) 4652 { 4653 cur[0] = cur[1]; 4654 cur++; 4655 } 4656 limit[0] = NULL; 4657 4658 /* destroy the module */ 4659 Destroy_Module( module ); 4660 4661 return FT_Err_Ok; 4662 } 4663 } 4664 } 4665 return FT_THROW( Invalid_Driver_Handle ); 4666 } 4667 4668 4669 static FT_Error 4670 ft_property_do( FT_Library library, 4671 const FT_String* module_name, 4672 const FT_String* property_name, 4673 void* value, 4674 FT_Bool set, 4675 FT_Bool value_is_string ) 4676 { 4677 FT_Module* cur; 4678 FT_Module* limit; 4679 FT_Module_Interface interface; 4680 4681 FT_Service_Properties service; 4682 4683 #ifdef FT_DEBUG_LEVEL_ERROR 4684 const FT_String* set_name = "FT_Property_Set"; 4685 const FT_String* get_name = "FT_Property_Get"; 4686 const FT_String* func_name = set ? set_name : get_name; 4687 #endif 4688 4689 FT_Bool missing_func; 4690 4691 4692 if ( !library ) 4693 return FT_THROW( Invalid_Library_Handle ); 4694 4695 if ( !module_name || !property_name || !value ) 4696 return FT_THROW( Invalid_Argument ); 4697 4698 cur = library->modules; 4699 limit = cur + library->num_modules; 4700 4701 /* search module */ 4702 for ( ; cur < limit; cur++ ) 4703 if ( !ft_strcmp( cur[0]->clazz->module_name, module_name ) ) 4704 break; 4705 4706 if ( cur == limit ) 4707 { 4708 FT_ERROR(( "%s: can't find module `%s'\n", 4709 func_name, module_name )); 4710 return FT_THROW( Missing_Module ); 4711 } 4712 4713 /* check whether we have a service interface */ 4714 if ( !cur[0]->clazz->get_interface ) 4715 { 4716 FT_ERROR(( "%s: module `%s' doesn't support properties\n", 4717 func_name, module_name )); 4718 return FT_THROW( Unimplemented_Feature ); 4719 } 4720 4721 /* search property service */ 4722 interface = cur[0]->clazz->get_interface( cur[0], 4723 FT_SERVICE_ID_PROPERTIES ); 4724 if ( !interface ) 4725 { 4726 FT_ERROR(( "%s: module `%s' doesn't support properties\n", 4727 func_name, module_name )); 4728 return FT_THROW( Unimplemented_Feature ); 4729 } 4730 4731 service = (FT_Service_Properties)interface; 4732 4733 if ( set ) 4734 missing_func = (FT_Bool)( !service->set_property ); 4735 else 4736 missing_func = (FT_Bool)( !service->get_property ); 4737 4738 if ( missing_func ) 4739 { 4740 FT_ERROR(( "%s: property service of module `%s' is broken\n", 4741 func_name, module_name )); 4742 return FT_THROW( Unimplemented_Feature ); 4743 } 4744 4745 return set ? service->set_property( cur[0], 4746 property_name, 4747 value, 4748 value_is_string ) 4749 : service->get_property( cur[0], 4750 property_name, 4751 value ); 4752 } 4753 4754 4755 /* documentation is in ftmodapi.h */ 4756 4757 FT_EXPORT_DEF( FT_Error ) 4758 FT_Property_Set( FT_Library library, 4759 const FT_String* module_name, 4760 const FT_String* property_name, 4761 const void* value ) 4762 { 4763 return ft_property_do( library, 4764 module_name, 4765 property_name, 4766 (void*)value, 4767 TRUE, 4768 FALSE ); 4769 } 4770 4771 4772 /* documentation is in ftmodapi.h */ 4773 4774 FT_EXPORT_DEF( FT_Error ) 4775 FT_Property_Get( FT_Library library, 4776 const FT_String* module_name, 4777 const FT_String* property_name, 4778 void* value ) 4779 { 4780 return ft_property_do( library, 4781 module_name, 4782 property_name, 4783 value, 4784 FALSE, 4785 FALSE ); 4786 } 4787 4788 4789 #ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES 4790 4791 /* this variant is used for handling the FREETYPE_PROPERTIES */ 4792 /* environment variable */ 4793 4794 FT_BASE_DEF( FT_Error ) 4795 ft_property_string_set( FT_Library library, 4796 const FT_String* module_name, 4797 const FT_String* property_name, 4798 FT_String* value ) 4799 { 4800 return ft_property_do( library, 4801 module_name, 4802 property_name, 4803 (void*)value, 4804 TRUE, 4805 TRUE ); 4806 } 4807 4808 #endif 4809 4810 4811 /*************************************************************************/ 4812 /*************************************************************************/ 4813 /*************************************************************************/ 4814 /**** ****/ 4815 /**** ****/ 4816 /**** L I B R A R Y ****/ 4817 /**** ****/ 4818 /**** ****/ 4819 /*************************************************************************/ 4820 /*************************************************************************/ 4821 /*************************************************************************/ 4822 4823 4824 /* documentation is in ftmodapi.h */ 4825 4826 FT_EXPORT_DEF( FT_Error ) 4827 FT_Reference_Library( FT_Library library ) 4828 { 4829 if ( !library ) 4830 return FT_THROW( Invalid_Library_Handle ); 4831 4832 library->refcount++; 4833 4834 return FT_Err_Ok; 4835 } 4836 4837 4838 /* documentation is in ftmodapi.h */ 4839 4840 FT_EXPORT_DEF( FT_Error ) 4841 FT_New_Library( FT_Memory memory, 4842 FT_Library *alibrary ) 4843 { 4844 FT_Library library = NULL; 4845 FT_Error error; 4846 4847 4848 if ( !memory || !alibrary ) 4849 return FT_THROW( Invalid_Argument ); 4850 4851 #ifdef FT_DEBUG_LEVEL_ERROR 4852 /* init debugging support */ 4853 ft_debug_init(); 4854 #endif 4855 4856 /* first of all, allocate the library object */ 4857 if ( FT_NEW( library ) ) 4858 return error; 4859 4860 library->memory = memory; 4861 4862 #ifdef FT_CONFIG_OPTION_PIC 4863 /* initialize position independent code containers */ 4864 error = ft_pic_container_init( library ); 4865 if ( error ) 4866 goto Fail; 4867 #endif 4868 4869 /* we don't use raster_pool anymore. */ 4870 library->raster_pool_size = 0; 4871 library->raster_pool = NULL; 4872 4873 library->version_major = FREETYPE_MAJOR; 4874 library->version_minor = FREETYPE_MINOR; 4875 library->version_patch = FREETYPE_PATCH; 4876 4877 library->refcount = 1; 4878 4879 /* That's ok now */ 4880 *alibrary = library; 4881 4882 return FT_Err_Ok; 4883 4884 #ifdef FT_CONFIG_OPTION_PIC 4885 Fail: 4886 ft_pic_container_destroy( library ); 4887 #endif 4888 FT_FREE( library ); 4889 return error; 4890 } 4891 4892 4893 /* documentation is in freetype.h */ 4894 4895 FT_EXPORT_DEF( void ) 4896 FT_Library_Version( FT_Library library, 4897 FT_Int *amajor, 4898 FT_Int *aminor, 4899 FT_Int *apatch ) 4900 { 4901 FT_Int major = 0; 4902 FT_Int minor = 0; 4903 FT_Int patch = 0; 4904 4905 4906 if ( library ) 4907 { 4908 major = library->version_major; 4909 minor = library->version_minor; 4910 patch = library->version_patch; 4911 } 4912 4913 if ( amajor ) 4914 *amajor = major; 4915 4916 if ( aminor ) 4917 *aminor = minor; 4918 4919 if ( apatch ) 4920 *apatch = patch; 4921 } 4922 4923 4924 /* documentation is in ftmodapi.h */ 4925 4926 FT_EXPORT_DEF( FT_Error ) 4927 FT_Done_Library( FT_Library library ) 4928 { 4929 FT_Memory memory; 4930 4931 4932 if ( !library ) 4933 return FT_THROW( Invalid_Library_Handle ); 4934 4935 library->refcount--; 4936 if ( library->refcount > 0 ) 4937 goto Exit; 4938 4939 memory = library->memory; 4940 4941 /* 4942 * Close all faces in the library. If we don't do this, we can have 4943 * some subtle memory leaks. 4944 * 4945 * Example: 4946 * 4947 * - the cff font driver uses the pshinter module in cff_size_done 4948 * - if the pshinter module is destroyed before the cff font driver, 4949 * opened FT_Face objects managed by the driver are not properly 4950 * destroyed, resulting in a memory leak 4951 * 4952 * Some faces are dependent on other faces, like Type42 faces that 4953 * depend on TrueType faces synthesized internally. 4954 * 4955 * The order of drivers should be specified in driver_name[]. 4956 */ 4957 { 4958 FT_UInt m, n; 4959 const char* driver_name[] = { "type42", NULL }; 4960 4961 4962 for ( m = 0; 4963 m < sizeof ( driver_name ) / sizeof ( driver_name[0] ); 4964 m++ ) 4965 { 4966 for ( n = 0; n < library->num_modules; n++ ) 4967 { 4968 FT_Module module = library->modules[n]; 4969 const char* module_name = module->clazz->module_name; 4970 FT_List faces; 4971 4972 4973 if ( driver_name[m] && 4974 ft_strcmp( module_name, driver_name[m] ) != 0 ) 4975 continue; 4976 4977 if ( ( module->clazz->module_flags & FT_MODULE_FONT_DRIVER ) == 0 ) 4978 continue; 4979 4980 FT_TRACE7(( "FT_Done_Library: close faces for %s\n", module_name )); 4981 4982 faces = &FT_DRIVER( module )->faces_list; 4983 while ( faces->head ) 4984 { 4985 FT_Done_Face( FT_FACE( faces->head->data ) ); 4986 if ( faces->head ) 4987 FT_TRACE0(( "FT_Done_Library: failed to free some faces\n" )); 4988 } 4989 } 4990 } 4991 } 4992 4993 /* Close all other modules in the library */ 4994 #if 1 4995 /* XXX Modules are removed in the reversed order so that */ 4996 /* type42 module is removed before truetype module. This */ 4997 /* avoids double free in some occasions. It is a hack. */ 4998 while ( library->num_modules > 0 ) 4999 FT_Remove_Module( library, 5000 library->modules[library->num_modules - 1] ); 5001 #else 5002 { 5003 FT_UInt n; 5004 5005 5006 for ( n = 0; n < library->num_modules; n++ ) 5007 { 5008 FT_Module module = library->modules[n]; 5009 5010 5011 if ( module ) 5012 { 5013 Destroy_Module( module ); 5014 library->modules[n] = NULL; 5015 } 5016 } 5017 } 5018 #endif 5019 5020 #ifdef FT_CONFIG_OPTION_PIC 5021 /* Destroy pic container contents */ 5022 ft_pic_container_destroy( library ); 5023 #endif 5024 5025 FT_FREE( library ); 5026 5027 Exit: 5028 return FT_Err_Ok; 5029 } 5030 5031 5032 /* documentation is in ftmodapi.h */ 5033 5034 FT_EXPORT_DEF( void ) 5035 FT_Set_Debug_Hook( FT_Library library, 5036 FT_UInt hook_index, 5037 FT_DebugHook_Func debug_hook ) 5038 { 5039 if ( library && debug_hook && 5040 hook_index < 5041 ( sizeof ( library->debug_hooks ) / sizeof ( void* ) ) ) 5042 library->debug_hooks[hook_index] = debug_hook; 5043 } 5044 5045 5046 /* documentation is in ftmodapi.h */ 5047 5048 FT_EXPORT_DEF( FT_TrueTypeEngineType ) 5049 FT_Get_TrueType_Engine_Type( FT_Library library ) 5050 { 5051 FT_TrueTypeEngineType result = FT_TRUETYPE_ENGINE_TYPE_NONE; 5052 5053 5054 if ( library ) 5055 { 5056 FT_Module module = FT_Get_Module( library, "truetype" ); 5057 5058 5059 if ( module ) 5060 { 5061 FT_Service_TrueTypeEngine service; 5062 5063 5064 service = (FT_Service_TrueTypeEngine) 5065 ft_module_get_service( module, 5066 FT_SERVICE_ID_TRUETYPE_ENGINE, 5067 0 ); 5068 if ( service ) 5069 result = service->engine_type; 5070 } 5071 } 5072 5073 return result; 5074 } 5075 5076 5077 /* documentation is in freetype.h */ 5078 5079 FT_EXPORT_DEF( FT_Error ) 5080 FT_Get_SubGlyph_Info( FT_GlyphSlot glyph, 5081 FT_UInt sub_index, 5082 FT_Int *p_index, 5083 FT_UInt *p_flags, 5084 FT_Int *p_arg1, 5085 FT_Int *p_arg2, 5086 FT_Matrix *p_transform ) 5087 { 5088 FT_Error error = FT_ERR( Invalid_Argument ); 5089 5090 5091 if ( glyph && 5092 glyph->subglyphs && 5093 glyph->format == FT_GLYPH_FORMAT_COMPOSITE && 5094 sub_index < glyph->num_subglyphs ) 5095 { 5096 FT_SubGlyph subg = glyph->subglyphs + sub_index; 5097 5098 5099 *p_index = subg->index; 5100 *p_flags = subg->flags; 5101 *p_arg1 = subg->arg1; 5102 *p_arg2 = subg->arg2; 5103 *p_transform = subg->transform; 5104 5105 error = FT_Err_Ok; 5106 } 5107 5108 return error; 5109 } 5110 5111 5112 /* END */ 5113
