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