1 /**************************************************************************** 2 * 3 * ftobjs.c 4 * 5 * The FreeType private base classes (body). 6 * 7 * Copyright (C) 1996-2021 by 8 * David Turner, Robert Wilhelm, and Werner Lemberg. 9 * 10 * This file is part of the FreeType project, and may only be used, 11 * modified, and distributed under the terms of the FreeType project 12 * license, LICENSE.TXT. By continuing to use, modify, or distribute 13 * this file you indicate that you have read the license and 14 * understand and accept it fully. 15 * 16 */ 17 18 19 #include <freetype/ftlist.h> 20 #include <freetype/ftoutln.h> 21 #include <freetype/ftfntfmt.h> 22 23 #include <freetype/internal/ftvalid.h> 24 #include <freetype/internal/ftobjs.h> 25 #include <freetype/internal/ftdebug.h> 26 #include <freetype/internal/ftrfork.h> 27 #include <freetype/internal/ftstream.h> 28 #include <freetype/internal/sfnt.h> /* for SFNT_Load_Table_Func */ 29 #include <freetype/internal/psaux.h> /* for PS_Driver */ 30 31 #include <freetype/tttables.h> 32 #include <freetype/tttags.h> 33 #include <freetype/ttnameid.h> 34 35 #include <freetype/internal/services/svprop.h> 36 #include <freetype/internal/services/svsfnt.h> 37 #include <freetype/internal/services/svpostnm.h> 38 #include <freetype/internal/services/svgldict.h> 39 #include <freetype/internal/services/svttcmap.h> 40 #include <freetype/internal/services/svkern.h> 41 #include <freetype/internal/services/svtteng.h> 42 43 #include <freetype/ftdriver.h> 44 45 #ifdef FT_CONFIG_OPTION_MAC_FONTS 46 #include "ftbase.h" 47 #endif 48 49 50 #ifdef FT_DEBUG_LEVEL_TRACE 51 52 #include <freetype/ftbitmap.h> 53 54 #if defined( _MSC_VER ) /* Visual C++ (and Intel C++) */ 55 /* We disable the warning `conversion from XXX to YYY, */ 56 /* possible loss of data' in order to compile cleanly with */ 57 /* the maximum level of warnings: `md5.c' is non-FreeType */ 58 /* code, and it gets used during development builds only. */ 59 #pragma warning( push ) 60 #pragma warning( disable : 4244 ) 61 #endif /* _MSC_VER */ 62 63 /* It's easiest to include `md5.c' directly. However, since OpenSSL */ 64 /* also provides the same functions, there might be conflicts if */ 65 /* both FreeType and OpenSSL are built as static libraries. For */ 66 /* this reason, we put the MD5 stuff into the `FT_' namespace. */ 67 #define MD5_u32plus FT_MD5_u32plus 68 #define MD5_CTX FT_MD5_CTX 69 #define MD5_Init FT_MD5_Init 70 #define MD5_Update FT_MD5_Update 71 #define MD5_Final FT_MD5_Final 72 73 #undef HAVE_OPENSSL 74 75 #include "md5.c" 76 77 #if defined( _MSC_VER ) 78 #pragma warning( pop ) 79 #endif 80 81 /* This array must stay in sync with the @FT_Pixel_Mode enumeration */ 82 /* (in file `ftimage.h`). */ 83 84 static const char* const pixel_modes[] = 85 { 86 "none", 87 "monochrome bitmap", 88 "gray 8-bit bitmap", 89 "gray 2-bit bitmap", 90 "gray 4-bit bitmap", 91 "LCD 8-bit bitmap", 92 "vertical LCD 8-bit bitmap", 93 "BGRA 32-bit color image bitmap", 94 "SDF 8-bit bitmap" 95 }; 96 97 #endif /* FT_DEBUG_LEVEL_TRACE */ 98 99 100 #define GRID_FIT_METRICS 101 102 103 /* forward declaration */ 104 static FT_Error 105 ft_open_face_internal( FT_Library library, 106 const FT_Open_Args* args, 107 FT_Long face_index, 108 FT_Face *aface, 109 FT_Bool test_mac_fonts ); 110 111 112 FT_BASE_DEF( FT_Pointer ) ft_service_list_lookup(FT_ServiceDesc service_descriptors,const char * service_id)113 ft_service_list_lookup( FT_ServiceDesc service_descriptors, 114 const char* service_id ) 115 { 116 FT_Pointer result = NULL; 117 FT_ServiceDesc desc = service_descriptors; 118 119 120 if ( desc && service_id ) 121 { 122 for ( ; desc->serv_id != NULL; desc++ ) 123 { 124 if ( ft_strcmp( desc->serv_id, service_id ) == 0 ) 125 { 126 result = (FT_Pointer)desc->serv_data; 127 break; 128 } 129 } 130 } 131 132 return result; 133 } 134 135 136 FT_BASE_DEF( void ) ft_validator_init(FT_Validator valid,const FT_Byte * base,const FT_Byte * limit,FT_ValidationLevel level)137 ft_validator_init( FT_Validator valid, 138 const FT_Byte* base, 139 const FT_Byte* limit, 140 FT_ValidationLevel level ) 141 { 142 valid->base = base; 143 valid->limit = limit; 144 valid->level = level; 145 valid->error = FT_Err_Ok; 146 } 147 148 149 FT_BASE_DEF( FT_Int ) ft_validator_run(FT_Validator valid)150 ft_validator_run( FT_Validator valid ) 151 { 152 /* This function doesn't work! None should call it. */ 153 FT_UNUSED( valid ); 154 155 return -1; 156 } 157 158 159 FT_BASE_DEF( void ) ft_validator_error(FT_Validator valid,FT_Error error)160 ft_validator_error( FT_Validator valid, 161 FT_Error error ) 162 { 163 /* since the cast below also disables the compiler's */ 164 /* type check, we introduce a dummy variable, which */ 165 /* will be optimized away */ 166 volatile ft_jmp_buf* jump_buffer = &valid->jump_buffer; 167 168 169 valid->error = error; 170 171 /* throw away volatileness; use `jump_buffer' or the */ 172 /* compiler may warn about an unused local variable */ 173 ft_longjmp( *(ft_jmp_buf*) jump_buffer, 1 ); 174 } 175 176 177 /*************************************************************************/ 178 /*************************************************************************/ 179 /*************************************************************************/ 180 /**** ****/ 181 /**** ****/ 182 /**** S T R E A M ****/ 183 /**** ****/ 184 /**** ****/ 185 /*************************************************************************/ 186 /*************************************************************************/ 187 /*************************************************************************/ 188 189 190 /* create a new input stream from an FT_Open_Args structure */ 191 /* */ 192 FT_BASE_DEF( FT_Error ) FT_Stream_New(FT_Library library,const FT_Open_Args * args,FT_Stream * astream)193 FT_Stream_New( FT_Library library, 194 const FT_Open_Args* args, 195 FT_Stream *astream ) 196 { 197 FT_Error error; 198 FT_Memory memory; 199 FT_Stream stream = NULL; 200 FT_UInt mode; 201 202 203 *astream = NULL; 204 205 if ( !library ) 206 return FT_THROW( Invalid_Library_Handle ); 207 208 if ( !args ) 209 return FT_THROW( Invalid_Argument ); 210 211 memory = library->memory; 212 mode = args->flags & 213 ( FT_OPEN_MEMORY | FT_OPEN_STREAM | FT_OPEN_PATHNAME ); 214 215 if ( mode == FT_OPEN_MEMORY ) 216 { 217 /* create a memory-based stream */ 218 if ( FT_NEW( stream ) ) 219 goto Exit; 220 221 FT_Stream_OpenMemory( stream, 222 (const FT_Byte*)args->memory_base, 223 (FT_ULong)args->memory_size ); 224 stream->memory = memory; 225 } 226 227 #ifndef FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT 228 229 else if ( mode == FT_OPEN_PATHNAME ) 230 { 231 /* create a normal system stream */ 232 if ( FT_NEW( stream ) ) 233 goto Exit; 234 235 stream->memory = memory; 236 error = FT_Stream_Open( stream, args->pathname ); 237 if ( error ) 238 FT_FREE( stream ); 239 } 240 else if ( ( mode == FT_OPEN_STREAM ) && args->stream ) 241 { 242 /* use an existing, user-provided stream */ 243 244 /* in this case, we do not need to allocate a new stream object */ 245 /* since the caller is responsible for closing it himself */ 246 stream = args->stream; 247 stream->memory = memory; 248 error = FT_Err_Ok; 249 } 250 251 #endif 252 253 else 254 { 255 error = FT_THROW( Invalid_Argument ); 256 if ( ( args->flags & FT_OPEN_STREAM ) && args->stream ) 257 FT_Stream_Close( args->stream ); 258 } 259 260 if ( !error ) 261 *astream = stream; 262 263 Exit: 264 return error; 265 } 266 267 268 FT_BASE_DEF( void ) FT_Stream_Free(FT_Stream stream,FT_Int external)269 FT_Stream_Free( FT_Stream stream, 270 FT_Int external ) 271 { 272 if ( stream ) 273 { 274 FT_Memory memory = stream->memory; 275 276 277 FT_Stream_Close( stream ); 278 279 if ( !external ) 280 FT_FREE( stream ); 281 } 282 } 283 284 285 /************************************************************************** 286 * 287 * The macro FT_COMPONENT is used in trace mode. It is an implicit 288 * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log 289 * messages during execution. 290 */ 291 #undef FT_COMPONENT 292 #define FT_COMPONENT objs 293 294 295 /*************************************************************************/ 296 /*************************************************************************/ 297 /*************************************************************************/ 298 /**** ****/ 299 /**** ****/ 300 /**** FACE, SIZE & GLYPH SLOT OBJECTS ****/ 301 /**** ****/ 302 /**** ****/ 303 /*************************************************************************/ 304 /*************************************************************************/ 305 /*************************************************************************/ 306 307 308 static FT_Error ft_glyphslot_init(FT_GlyphSlot slot)309 ft_glyphslot_init( FT_GlyphSlot slot ) 310 { 311 FT_Driver driver = slot->face->driver; 312 FT_Driver_Class clazz = driver->clazz; 313 FT_Memory memory = driver->root.memory; 314 FT_Error error = FT_Err_Ok; 315 FT_Slot_Internal internal = NULL; 316 317 318 slot->library = driver->root.library; 319 320 if ( FT_NEW( internal ) ) 321 goto Exit; 322 323 slot->internal = internal; 324 325 if ( FT_DRIVER_USES_OUTLINES( driver ) ) 326 error = FT_GlyphLoader_New( memory, &internal->loader ); 327 328 if ( !error && clazz->init_slot ) 329 error = clazz->init_slot( slot ); 330 331 Exit: 332 return error; 333 } 334 335 336 FT_BASE_DEF( void ) ft_glyphslot_free_bitmap(FT_GlyphSlot slot)337 ft_glyphslot_free_bitmap( FT_GlyphSlot slot ) 338 { 339 if ( slot->internal && ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) 340 { 341 FT_Memory memory = FT_FACE_MEMORY( slot->face ); 342 343 344 FT_FREE( slot->bitmap.buffer ); 345 slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; 346 } 347 else 348 { 349 /* assume that the bitmap buffer was stolen or not */ 350 /* allocated from the heap */ 351 slot->bitmap.buffer = NULL; 352 } 353 } 354 355 356 /* overflow-resistant presetting of bitmap position and dimensions; */ 357 /* also check whether the size is too large for rendering */ 358 FT_BASE_DEF( FT_Bool ) ft_glyphslot_preset_bitmap(FT_GlyphSlot slot,FT_Render_Mode mode,const FT_Vector * origin)359 ft_glyphslot_preset_bitmap( FT_GlyphSlot slot, 360 FT_Render_Mode mode, 361 const FT_Vector* origin ) 362 { 363 FT_Outline* outline = &slot->outline; 364 FT_Bitmap* bitmap = &slot->bitmap; 365 366 FT_Pixel_Mode pixel_mode; 367 368 FT_BBox cbox, pbox; 369 FT_Pos x_shift = 0; 370 FT_Pos y_shift = 0; 371 FT_Pos x_left, y_top; 372 FT_Pos width, height, pitch; 373 374 375 if ( slot->format != FT_GLYPH_FORMAT_OUTLINE ) 376 return 1; 377 378 if ( origin ) 379 { 380 x_shift = origin->x; 381 y_shift = origin->y; 382 } 383 384 /* compute the control box, and grid-fit it, */ 385 /* taking into account the origin shift */ 386 FT_Outline_Get_CBox( outline, &cbox ); 387 388 /* rough estimate of pixel box */ 389 pbox.xMin = ( cbox.xMin >> 6 ) + ( x_shift >> 6 ); 390 pbox.yMin = ( cbox.yMin >> 6 ) + ( y_shift >> 6 ); 391 pbox.xMax = ( cbox.xMax >> 6 ) + ( x_shift >> 6 ); 392 pbox.yMax = ( cbox.yMax >> 6 ) + ( y_shift >> 6 ); 393 394 /* tiny remainder box */ 395 cbox.xMin = ( cbox.xMin & 63 ) + ( x_shift & 63 ); 396 cbox.yMin = ( cbox.yMin & 63 ) + ( y_shift & 63 ); 397 cbox.xMax = ( cbox.xMax & 63 ) + ( x_shift & 63 ); 398 cbox.yMax = ( cbox.yMax & 63 ) + ( y_shift & 63 ); 399 400 switch ( mode ) 401 { 402 case FT_RENDER_MODE_MONO: 403 pixel_mode = FT_PIXEL_MODE_MONO; 404 #if 1 405 /* x */ 406 407 /* undocumented but confirmed: bbox values get rounded; */ 408 /* we do asymmetric rounding so that the center of a pixel */ 409 /* gets always included */ 410 411 pbox.xMin += ( cbox.xMin + 31 ) >> 6; 412 pbox.xMax += ( cbox.xMax + 32 ) >> 6; 413 414 /* if the bbox collapsed, we add a pixel based on the total */ 415 /* rounding remainder to cover most of the original cbox */ 416 417 if ( pbox.xMin == pbox.xMax ) 418 { 419 if ( ( ( cbox.xMin + 31 ) & 63 ) - 31 + 420 ( ( cbox.xMax + 32 ) & 63 ) - 32 < 0 ) 421 pbox.xMin -= 1; 422 else 423 pbox.xMax += 1; 424 } 425 426 /* y */ 427 428 pbox.yMin += ( cbox.yMin + 31 ) >> 6; 429 pbox.yMax += ( cbox.yMax + 32 ) >> 6; 430 431 if ( pbox.yMin == pbox.yMax ) 432 { 433 if ( ( ( cbox.yMin + 31 ) & 63 ) - 31 + 434 ( ( cbox.yMax + 32 ) & 63 ) - 32 < 0 ) 435 pbox.yMin -= 1; 436 else 437 pbox.yMax += 1; 438 } 439 440 break; 441 #else 442 goto Adjust; 443 #endif 444 445 case FT_RENDER_MODE_LCD: 446 pixel_mode = FT_PIXEL_MODE_LCD; 447 ft_lcd_padding( &cbox, slot, mode ); 448 goto Adjust; 449 450 case FT_RENDER_MODE_LCD_V: 451 pixel_mode = FT_PIXEL_MODE_LCD_V; 452 ft_lcd_padding( &cbox, slot, mode ); 453 goto Adjust; 454 455 case FT_RENDER_MODE_NORMAL: 456 case FT_RENDER_MODE_LIGHT: 457 default: 458 pixel_mode = FT_PIXEL_MODE_GRAY; 459 Adjust: 460 pbox.xMin += cbox.xMin >> 6; 461 pbox.yMin += cbox.yMin >> 6; 462 pbox.xMax += ( cbox.xMax + 63 ) >> 6; 463 pbox.yMax += ( cbox.yMax + 63 ) >> 6; 464 } 465 466 x_left = pbox.xMin; 467 y_top = pbox.yMax; 468 469 width = pbox.xMax - pbox.xMin; 470 height = pbox.yMax - pbox.yMin; 471 472 switch ( pixel_mode ) 473 { 474 case FT_PIXEL_MODE_MONO: 475 pitch = ( ( width + 15 ) >> 4 ) << 1; 476 break; 477 478 case FT_PIXEL_MODE_LCD: 479 width *= 3; 480 pitch = FT_PAD_CEIL( width, 4 ); 481 break; 482 483 case FT_PIXEL_MODE_LCD_V: 484 height *= 3; 485 /* fall through */ 486 487 case FT_PIXEL_MODE_GRAY: 488 default: 489 pitch = width; 490 } 491 492 slot->bitmap_left = (FT_Int)x_left; 493 slot->bitmap_top = (FT_Int)y_top; 494 495 bitmap->pixel_mode = (unsigned char)pixel_mode; 496 bitmap->num_grays = 256; 497 bitmap->width = (unsigned int)width; 498 bitmap->rows = (unsigned int)height; 499 bitmap->pitch = pitch; 500 501 if ( pbox.xMin < -0x8000 || pbox.xMax > 0x7FFF || 502 pbox.yMin < -0x8000 || pbox.yMax > 0x7FFF ) 503 { 504 FT_TRACE3(( "ft_glyphslot_preset_bitmap: [%ld %ld %ld %ld]\n", 505 pbox.xMin, pbox.yMin, pbox.xMax, pbox.yMax )); 506 return 1; 507 } 508 509 return 0; 510 } 511 512 513 FT_BASE_DEF( void ) ft_glyphslot_set_bitmap(FT_GlyphSlot slot,FT_Byte * buffer)514 ft_glyphslot_set_bitmap( FT_GlyphSlot slot, 515 FT_Byte* buffer ) 516 { 517 ft_glyphslot_free_bitmap( slot ); 518 519 slot->bitmap.buffer = buffer; 520 521 FT_ASSERT( (slot->internal->flags & FT_GLYPH_OWN_BITMAP) == 0 ); 522 } 523 524 525 FT_BASE_DEF( FT_Error ) ft_glyphslot_alloc_bitmap(FT_GlyphSlot slot,FT_ULong size)526 ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot, 527 FT_ULong size ) 528 { 529 FT_Memory memory = FT_FACE_MEMORY( slot->face ); 530 FT_Error error; 531 532 533 if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) 534 FT_FREE( slot->bitmap.buffer ); 535 else 536 slot->internal->flags |= FT_GLYPH_OWN_BITMAP; 537 538 FT_MEM_ALLOC( slot->bitmap.buffer, size ); 539 return error; 540 } 541 542 543 static void ft_glyphslot_clear(FT_GlyphSlot slot)544 ft_glyphslot_clear( FT_GlyphSlot slot ) 545 { 546 /* free bitmap if needed */ 547 ft_glyphslot_free_bitmap( slot ); 548 549 /* clear all public fields in the glyph slot */ 550 slot->glyph_index = 0; 551 552 FT_ZERO( &slot->metrics ); 553 FT_ZERO( &slot->outline ); 554 555 slot->bitmap.width = 0; 556 slot->bitmap.rows = 0; 557 slot->bitmap.pitch = 0; 558 slot->bitmap.pixel_mode = 0; 559 /* `slot->bitmap.buffer' has been handled by ft_glyphslot_free_bitmap */ 560 561 slot->bitmap_left = 0; 562 slot->bitmap_top = 0; 563 slot->num_subglyphs = 0; 564 slot->subglyphs = NULL; 565 slot->control_data = NULL; 566 slot->control_len = 0; 567 slot->other = NULL; 568 slot->format = FT_GLYPH_FORMAT_NONE; 569 570 slot->linearHoriAdvance = 0; 571 slot->linearVertAdvance = 0; 572 slot->advance.x = 0; 573 slot->advance.y = 0; 574 slot->lsb_delta = 0; 575 slot->rsb_delta = 0; 576 } 577 578 579 static void ft_glyphslot_done(FT_GlyphSlot slot)580 ft_glyphslot_done( FT_GlyphSlot slot ) 581 { 582 FT_Driver driver = slot->face->driver; 583 FT_Driver_Class clazz = driver->clazz; 584 FT_Memory memory = driver->root.memory; 585 586 587 if ( clazz->done_slot ) 588 clazz->done_slot( slot ); 589 590 /* free bitmap buffer if needed */ 591 ft_glyphslot_free_bitmap( slot ); 592 593 /* slot->internal might be NULL in out-of-memory situations */ 594 if ( slot->internal ) 595 { 596 /* free glyph loader */ 597 if ( FT_DRIVER_USES_OUTLINES( driver ) ) 598 { 599 FT_GlyphLoader_Done( slot->internal->loader ); 600 slot->internal->loader = NULL; 601 } 602 603 FT_FREE( slot->internal ); 604 } 605 } 606 607 608 /* documentation is in ftobjs.h */ 609 610 FT_BASE_DEF( FT_Error ) FT_New_GlyphSlot(FT_Face face,FT_GlyphSlot * aslot)611 FT_New_GlyphSlot( FT_Face face, 612 FT_GlyphSlot *aslot ) 613 { 614 FT_Error error; 615 FT_Driver driver; 616 FT_Driver_Class clazz; 617 FT_Memory memory; 618 FT_GlyphSlot slot = NULL; 619 620 621 if ( !face ) 622 return FT_THROW( Invalid_Face_Handle ); 623 624 if ( !face->driver ) 625 return FT_THROW( Invalid_Argument ); 626 627 driver = face->driver; 628 clazz = driver->clazz; 629 memory = driver->root.memory; 630 631 FT_TRACE4(( "FT_New_GlyphSlot: Creating new slot object\n" )); 632 if ( !FT_ALLOC( slot, clazz->slot_object_size ) ) 633 { 634 slot->face = face; 635 636 error = ft_glyphslot_init( slot ); 637 if ( error ) 638 { 639 ft_glyphslot_done( slot ); 640 FT_FREE( slot ); 641 goto Exit; 642 } 643 644 slot->next = face->glyph; 645 face->glyph = slot; 646 647 if ( aslot ) 648 *aslot = slot; 649 } 650 else if ( aslot ) 651 *aslot = NULL; 652 653 654 Exit: 655 FT_TRACE4(( "FT_New_GlyphSlot: Return 0x%x\n", error )); 656 657 return error; 658 } 659 660 661 /* documentation is in ftobjs.h */ 662 663 FT_BASE_DEF( void ) FT_Done_GlyphSlot(FT_GlyphSlot slot)664 FT_Done_GlyphSlot( FT_GlyphSlot slot ) 665 { 666 if ( slot ) 667 { 668 FT_Driver driver = slot->face->driver; 669 FT_Memory memory = driver->root.memory; 670 FT_GlyphSlot prev; 671 FT_GlyphSlot cur; 672 673 674 /* Remove slot from its parent face's list */ 675 prev = NULL; 676 cur = slot->face->glyph; 677 678 while ( cur ) 679 { 680 if ( cur == slot ) 681 { 682 if ( !prev ) 683 slot->face->glyph = cur->next; 684 else 685 prev->next = cur->next; 686 687 /* finalize client-specific data */ 688 if ( slot->generic.finalizer ) 689 slot->generic.finalizer( slot ); 690 691 ft_glyphslot_done( slot ); 692 FT_FREE( slot ); 693 break; 694 } 695 prev = cur; 696 cur = cur->next; 697 } 698 } 699 } 700 701 702 /* documentation is in freetype.h */ 703 704 FT_EXPORT_DEF( void ) FT_Set_Transform(FT_Face face,FT_Matrix * matrix,FT_Vector * delta)705 FT_Set_Transform( FT_Face face, 706 FT_Matrix* matrix, 707 FT_Vector* delta ) 708 { 709 FT_Face_Internal internal; 710 711 712 if ( !face ) 713 return; 714 715 internal = face->internal; 716 717 internal->transform_flags = 0; 718 719 if ( !matrix ) 720 { 721 internal->transform_matrix.xx = 0x10000L; 722 internal->transform_matrix.xy = 0; 723 internal->transform_matrix.yx = 0; 724 internal->transform_matrix.yy = 0x10000L; 725 726 matrix = &internal->transform_matrix; 727 } 728 else 729 internal->transform_matrix = *matrix; 730 731 /* set transform_flags bit flag 0 if `matrix' isn't the identity */ 732 if ( ( matrix->xy | matrix->yx ) || 733 matrix->xx != 0x10000L || 734 matrix->yy != 0x10000L ) 735 internal->transform_flags |= 1; 736 737 if ( !delta ) 738 { 739 internal->transform_delta.x = 0; 740 internal->transform_delta.y = 0; 741 742 delta = &internal->transform_delta; 743 } 744 else 745 internal->transform_delta = *delta; 746 747 /* set transform_flags bit flag 1 if `delta' isn't the null vector */ 748 if ( delta->x | delta->y ) 749 internal->transform_flags |= 2; 750 } 751 752 753 /* documentation is in freetype.h */ 754 755 FT_EXPORT_DEF( void ) FT_Get_Transform(FT_Face face,FT_Matrix * matrix,FT_Vector * delta)756 FT_Get_Transform( FT_Face face, 757 FT_Matrix* matrix, 758 FT_Vector* delta ) 759 { 760 FT_Face_Internal internal; 761 762 763 if ( !face ) 764 return; 765 766 internal = face->internal; 767 768 if ( matrix ) 769 *matrix = internal->transform_matrix; 770 771 if ( delta ) 772 *delta = internal->transform_delta; 773 } 774 775 776 static FT_Renderer 777 ft_lookup_glyph_renderer( FT_GlyphSlot slot ); 778 779 780 #ifdef GRID_FIT_METRICS 781 static void ft_glyphslot_grid_fit_metrics(FT_GlyphSlot slot,FT_Bool vertical)782 ft_glyphslot_grid_fit_metrics( FT_GlyphSlot slot, 783 FT_Bool vertical ) 784 { 785 FT_Glyph_Metrics* metrics = &slot->metrics; 786 FT_Pos right, bottom; 787 788 789 if ( vertical ) 790 { 791 metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); 792 metrics->horiBearingY = FT_PIX_CEIL_LONG( metrics->horiBearingY ); 793 794 right = FT_PIX_CEIL_LONG( ADD_LONG( metrics->vertBearingX, 795 metrics->width ) ); 796 bottom = FT_PIX_CEIL_LONG( ADD_LONG( metrics->vertBearingY, 797 metrics->height ) ); 798 799 metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); 800 metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); 801 802 metrics->width = SUB_LONG( right, 803 metrics->vertBearingX ); 804 metrics->height = SUB_LONG( bottom, 805 metrics->vertBearingY ); 806 } 807 else 808 { 809 metrics->vertBearingX = FT_PIX_FLOOR( metrics->vertBearingX ); 810 metrics->vertBearingY = FT_PIX_FLOOR( metrics->vertBearingY ); 811 812 right = FT_PIX_CEIL_LONG( ADD_LONG( metrics->horiBearingX, 813 metrics->width ) ); 814 bottom = FT_PIX_FLOOR( SUB_LONG( metrics->horiBearingY, 815 metrics->height ) ); 816 817 metrics->horiBearingX = FT_PIX_FLOOR( metrics->horiBearingX ); 818 metrics->horiBearingY = FT_PIX_CEIL_LONG( metrics->horiBearingY ); 819 820 metrics->width = SUB_LONG( right, 821 metrics->horiBearingX ); 822 metrics->height = SUB_LONG( metrics->horiBearingY, 823 bottom ); 824 } 825 826 metrics->horiAdvance = FT_PIX_ROUND_LONG( metrics->horiAdvance ); 827 metrics->vertAdvance = FT_PIX_ROUND_LONG( metrics->vertAdvance ); 828 } 829 #endif /* GRID_FIT_METRICS */ 830 831 832 /* documentation is in freetype.h */ 833 834 FT_EXPORT_DEF( FT_Error ) FT_Load_Glyph(FT_Face face,FT_UInt glyph_index,FT_Int32 load_flags)835 FT_Load_Glyph( FT_Face face, 836 FT_UInt glyph_index, 837 FT_Int32 load_flags ) 838 { 839 FT_Error error; 840 FT_Driver driver; 841 FT_GlyphSlot slot; 842 FT_Library library; 843 FT_Bool autohint = FALSE; 844 FT_Module hinter; 845 TT_Face ttface = (TT_Face)face; 846 847 848 if ( !face || !face->size || !face->glyph ) 849 return FT_THROW( Invalid_Face_Handle ); 850 851 /* The validity test for `glyph_index' is performed by the */ 852 /* font drivers. */ 853 854 slot = face->glyph; 855 ft_glyphslot_clear( slot ); 856 857 driver = face->driver; 858 library = driver->root.library; 859 hinter = library->auto_hinter; 860 861 /* resolve load flags dependencies */ 862 863 if ( load_flags & FT_LOAD_NO_RECURSE ) 864 load_flags |= FT_LOAD_NO_SCALE | 865 FT_LOAD_IGNORE_TRANSFORM; 866 867 if ( load_flags & FT_LOAD_NO_SCALE ) 868 { 869 load_flags |= FT_LOAD_NO_HINTING | 870 FT_LOAD_NO_BITMAP; 871 872 load_flags &= ~FT_LOAD_RENDER; 873 } 874 875 if ( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) 876 load_flags &= ~FT_LOAD_RENDER; 877 878 /* 879 * Determine whether we need to auto-hint or not. 880 * The general rules are: 881 * 882 * - Do only auto-hinting if we have 883 * 884 * - a hinter module, 885 * - a scalable font, 886 * - not a tricky font, and 887 * - no transforms except simple slants and/or rotations by 888 * integer multiples of 90 degrees. 889 * 890 * - Then, auto-hint if FT_LOAD_FORCE_AUTOHINT is set or if we don't 891 * have a native font hinter. 892 * 893 * - Otherwise, auto-hint for LIGHT hinting mode or if there isn't 894 * any hinting bytecode in the TrueType/OpenType font. 895 * 896 * - Exception: The font is `tricky' and requires the native hinter to 897 * load properly. 898 */ 899 900 if ( hinter && 901 !( load_flags & FT_LOAD_NO_HINTING ) && 902 !( load_flags & FT_LOAD_NO_AUTOHINT ) && 903 FT_IS_SCALABLE( face ) && 904 !FT_IS_TRICKY( face ) && 905 ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) || 906 ( face->internal->transform_matrix.yx == 0 && 907 face->internal->transform_matrix.xx != 0 ) || 908 ( face->internal->transform_matrix.xx == 0 && 909 face->internal->transform_matrix.yx != 0 ) ) ) 910 { 911 if ( ( load_flags & FT_LOAD_FORCE_AUTOHINT ) || 912 !FT_DRIVER_HAS_HINTER( driver ) ) 913 autohint = TRUE; 914 else 915 { 916 FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); 917 FT_Bool is_light_type1; 918 919 920 /* only the new Adobe engine (for both CFF and Type 1) is `light'; */ 921 /* we use `strstr' to catch both `Type 1' and `CID Type 1' */ 922 is_light_type1 = 923 ft_strstr( FT_Get_Font_Format( face ), "Type 1" ) != NULL && 924 ((PS_Driver)driver)->hinting_engine == FT_HINTING_ADOBE; 925 926 /* the check for `num_locations' assures that we actually */ 927 /* test for instructions in a TTF and not in a CFF-based OTF */ 928 /* */ 929 /* since `maxSizeOfInstructions' might be unreliable, we */ 930 /* check the size of the `fpgm' and `prep' tables, too -- */ 931 /* the assumption is that there don't exist real TTFs where */ 932 /* both `fpgm' and `prep' tables are missing */ 933 if ( ( mode == FT_RENDER_MODE_LIGHT && 934 ( !FT_DRIVER_HINTS_LIGHTLY( driver ) && 935 !is_light_type1 ) ) || 936 ( FT_IS_SFNT( face ) && 937 ttface->num_locations && 938 ttface->max_profile.maxSizeOfInstructions == 0 && 939 ttface->font_program_size == 0 && 940 ttface->cvt_program_size == 0 ) ) 941 autohint = TRUE; 942 } 943 } 944 945 if ( autohint ) 946 { 947 FT_AutoHinter_Interface hinting; 948 949 950 /* try to load embedded bitmaps first if available */ 951 /* */ 952 /* XXX: This is really a temporary hack that should disappear */ 953 /* promptly with FreeType 2.1! */ 954 /* */ 955 if ( FT_HAS_FIXED_SIZES( face ) && 956 ( load_flags & FT_LOAD_NO_BITMAP ) == 0 ) 957 { 958 error = driver->clazz->load_glyph( slot, face->size, 959 glyph_index, 960 load_flags | FT_LOAD_SBITS_ONLY ); 961 962 if ( !error && slot->format == FT_GLYPH_FORMAT_BITMAP ) 963 goto Load_Ok; 964 } 965 966 { 967 FT_Face_Internal internal = face->internal; 968 FT_Int transform_flags = internal->transform_flags; 969 970 971 /* since the auto-hinter calls FT_Load_Glyph by itself, */ 972 /* make sure that glyphs aren't transformed */ 973 internal->transform_flags = 0; 974 975 /* load auto-hinted outline */ 976 hinting = (FT_AutoHinter_Interface)hinter->clazz->module_interface; 977 978 error = hinting->load_glyph( (FT_AutoHinter)hinter, 979 slot, face->size, 980 glyph_index, load_flags ); 981 982 internal->transform_flags = transform_flags; 983 } 984 } 985 else 986 { 987 error = driver->clazz->load_glyph( slot, 988 face->size, 989 glyph_index, 990 load_flags ); 991 if ( error ) 992 goto Exit; 993 994 if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) 995 { 996 /* check that the loaded outline is correct */ 997 error = FT_Outline_Check( &slot->outline ); 998 if ( error ) 999 goto Exit; 1000 1001 #ifdef GRID_FIT_METRICS 1002 if ( !( load_flags & FT_LOAD_NO_HINTING ) ) 1003 ft_glyphslot_grid_fit_metrics( 1004 slot, 1005 FT_BOOL( load_flags & FT_LOAD_VERTICAL_LAYOUT ) ); 1006 #endif 1007 } 1008 } 1009 1010 Load_Ok: 1011 /* compute the advance */ 1012 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) 1013 { 1014 slot->advance.x = 0; 1015 slot->advance.y = slot->metrics.vertAdvance; 1016 } 1017 else 1018 { 1019 slot->advance.x = slot->metrics.horiAdvance; 1020 slot->advance.y = 0; 1021 } 1022 1023 /* compute the linear advance in 16.16 pixels */ 1024 if ( ( load_flags & FT_LOAD_LINEAR_DESIGN ) == 0 && 1025 FT_IS_SCALABLE( face ) ) 1026 { 1027 FT_Size_Metrics* metrics = &face->size->metrics; 1028 1029 1030 /* it's tricky! */ 1031 slot->linearHoriAdvance = FT_MulDiv( slot->linearHoriAdvance, 1032 metrics->x_scale, 64 ); 1033 1034 slot->linearVertAdvance = FT_MulDiv( slot->linearVertAdvance, 1035 metrics->y_scale, 64 ); 1036 } 1037 1038 if ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) == 0 ) 1039 { 1040 FT_Face_Internal internal = face->internal; 1041 1042 1043 /* now, transform the glyph image if needed */ 1044 if ( internal->transform_flags ) 1045 { 1046 /* get renderer */ 1047 FT_Renderer renderer = ft_lookup_glyph_renderer( slot ); 1048 1049 1050 if ( renderer ) 1051 error = renderer->clazz->transform_glyph( 1052 renderer, slot, 1053 &internal->transform_matrix, 1054 &internal->transform_delta ); 1055 else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) 1056 { 1057 /* apply `standard' transformation if no renderer is available */ 1058 if ( internal->transform_flags & 1 ) 1059 FT_Outline_Transform( &slot->outline, 1060 &internal->transform_matrix ); 1061 1062 if ( internal->transform_flags & 2 ) 1063 FT_Outline_Translate( &slot->outline, 1064 internal->transform_delta.x, 1065 internal->transform_delta.y ); 1066 } 1067 1068 /* transform advance */ 1069 FT_Vector_Transform( &slot->advance, &internal->transform_matrix ); 1070 } 1071 } 1072 1073 slot->glyph_index = glyph_index; 1074 slot->internal->load_flags = load_flags; 1075 1076 /* do we need to render the image or preset the bitmap now? */ 1077 if ( !error && 1078 ( load_flags & FT_LOAD_NO_SCALE ) == 0 && 1079 slot->format != FT_GLYPH_FORMAT_BITMAP && 1080 slot->format != FT_GLYPH_FORMAT_COMPOSITE ) 1081 { 1082 FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); 1083 1084 1085 if ( mode == FT_RENDER_MODE_NORMAL && 1086 load_flags & FT_LOAD_MONOCHROME ) 1087 mode = FT_RENDER_MODE_MONO; 1088 1089 if ( load_flags & FT_LOAD_RENDER ) 1090 error = FT_Render_Glyph( slot, mode ); 1091 else 1092 ft_glyphslot_preset_bitmap( slot, mode, NULL ); 1093 } 1094 1095 #ifdef FT_DEBUG_LEVEL_TRACE 1096 FT_TRACE5(( "FT_Load_Glyph: index %d, flags 0x%x\n", 1097 glyph_index, load_flags )); 1098 FT_TRACE5(( " bitmap %dx%d %s, %s (mode %d)\n", 1099 slot->bitmap.width, 1100 slot->bitmap.rows, 1101 slot->outline.points ? 1102 slot->bitmap.buffer ? "rendered" 1103 : "preset" 1104 : 1105 slot->internal->flags & FT_GLYPH_OWN_BITMAP ? "owned" 1106 : "unowned", 1107 pixel_modes[slot->bitmap.pixel_mode], 1108 slot->bitmap.pixel_mode )); 1109 FT_TRACE5(( "\n" )); 1110 FT_TRACE5(( " x advance: %f\n", slot->advance.x / 64.0 )); 1111 FT_TRACE5(( " y advance: %f\n", slot->advance.y / 64.0 )); 1112 FT_TRACE5(( " linear x advance: %f\n", 1113 slot->linearHoriAdvance / 65536.0 )); 1114 FT_TRACE5(( " linear y advance: %f\n", 1115 slot->linearVertAdvance / 65536.0 )); 1116 1117 { 1118 FT_Glyph_Metrics* metrics = &slot->metrics; 1119 1120 1121 FT_TRACE5(( " metrics:\n" )); 1122 FT_TRACE5(( " width: %f\n", metrics->width / 64.0 )); 1123 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 1124 FT_TRACE5(( "\n" )); 1125 FT_TRACE5(( " horiBearingX: %f\n", metrics->horiBearingX / 64.0 )); 1126 FT_TRACE5(( " horiBearingY: %f\n", metrics->horiBearingY / 64.0 )); 1127 FT_TRACE5(( " horiAdvance: %f\n", metrics->horiAdvance / 64.0 )); 1128 FT_TRACE5(( "\n" )); 1129 FT_TRACE5(( " vertBearingX: %f\n", metrics->vertBearingX / 64.0 )); 1130 FT_TRACE5(( " vertBearingY: %f\n", metrics->vertBearingY / 64.0 )); 1131 FT_TRACE5(( " vertAdvance: %f\n", metrics->vertAdvance / 64.0 )); 1132 } 1133 #endif 1134 1135 Exit: 1136 return error; 1137 } 1138 1139 1140 /* documentation is in freetype.h */ 1141 1142 FT_EXPORT_DEF( FT_Error ) FT_Load_Char(FT_Face face,FT_ULong char_code,FT_Int32 load_flags)1143 FT_Load_Char( FT_Face face, 1144 FT_ULong char_code, 1145 FT_Int32 load_flags ) 1146 { 1147 FT_UInt glyph_index; 1148 1149 1150 if ( !face ) 1151 return FT_THROW( Invalid_Face_Handle ); 1152 1153 glyph_index = (FT_UInt)char_code; 1154 if ( face->charmap ) 1155 glyph_index = FT_Get_Char_Index( face, char_code ); 1156 1157 return FT_Load_Glyph( face, glyph_index, load_flags ); 1158 } 1159 1160 1161 /* destructor for sizes list */ 1162 static void destroy_size(FT_Memory memory,FT_Size size,FT_Driver driver)1163 destroy_size( FT_Memory memory, 1164 FT_Size size, 1165 FT_Driver driver ) 1166 { 1167 /* finalize client-specific data */ 1168 if ( size->generic.finalizer ) 1169 size->generic.finalizer( size ); 1170 1171 /* finalize format-specific stuff */ 1172 if ( driver->clazz->done_size ) 1173 driver->clazz->done_size( size ); 1174 1175 FT_FREE( size->internal ); 1176 FT_FREE( size ); 1177 } 1178 1179 1180 static void 1181 ft_cmap_done_internal( FT_CMap cmap ); 1182 1183 1184 static void destroy_charmaps(FT_Face face,FT_Memory memory)1185 destroy_charmaps( FT_Face face, 1186 FT_Memory memory ) 1187 { 1188 FT_Int n; 1189 1190 1191 if ( !face ) 1192 return; 1193 1194 for ( n = 0; n < face->num_charmaps; n++ ) 1195 { 1196 FT_CMap cmap = FT_CMAP( face->charmaps[n] ); 1197 1198 1199 ft_cmap_done_internal( cmap ); 1200 1201 face->charmaps[n] = NULL; 1202 } 1203 1204 FT_FREE( face->charmaps ); 1205 face->num_charmaps = 0; 1206 } 1207 1208 1209 /* destructor for faces list */ 1210 static void destroy_face(FT_Memory memory,FT_Face face,FT_Driver driver)1211 destroy_face( FT_Memory memory, 1212 FT_Face face, 1213 FT_Driver driver ) 1214 { 1215 FT_Driver_Class clazz = driver->clazz; 1216 1217 1218 /* discard auto-hinting data */ 1219 if ( face->autohint.finalizer ) 1220 face->autohint.finalizer( face->autohint.data ); 1221 1222 /* Discard glyph slots for this face. */ 1223 /* Beware! FT_Done_GlyphSlot() changes the field `face->glyph' */ 1224 while ( face->glyph ) 1225 FT_Done_GlyphSlot( face->glyph ); 1226 1227 /* discard all sizes for this face */ 1228 FT_List_Finalize( &face->sizes_list, 1229 (FT_List_Destructor)destroy_size, 1230 memory, 1231 driver ); 1232 face->size = NULL; 1233 1234 /* now discard client data */ 1235 if ( face->generic.finalizer ) 1236 face->generic.finalizer( face ); 1237 1238 /* discard charmaps */ 1239 destroy_charmaps( face, memory ); 1240 1241 /* finalize format-specific stuff */ 1242 if ( clazz->done_face ) 1243 clazz->done_face( face ); 1244 1245 /* close the stream for this face if needed */ 1246 FT_Stream_Free( 1247 face->stream, 1248 ( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 ); 1249 1250 face->stream = NULL; 1251 1252 /* get rid of it */ 1253 if ( face->internal ) 1254 { 1255 FT_FREE( face->internal ); 1256 } 1257 FT_FREE( face ); 1258 } 1259 1260 1261 static void Destroy_Driver(FT_Driver driver)1262 Destroy_Driver( FT_Driver driver ) 1263 { 1264 FT_List_Finalize( &driver->faces_list, 1265 (FT_List_Destructor)destroy_face, 1266 driver->root.memory, 1267 driver ); 1268 } 1269 1270 1271 /************************************************************************** 1272 * 1273 * @Function: 1274 * find_unicode_charmap 1275 * 1276 * @Description: 1277 * This function finds a Unicode charmap, if there is one. 1278 * And if there is more than one, it tries to favour the more 1279 * extensive one, i.e., one that supports UCS-4 against those which 1280 * are limited to the BMP (said UCS-2 encoding.) 1281 * 1282 * This function is called from open_face() (just below), and also 1283 * from FT_Select_Charmap( ..., FT_ENCODING_UNICODE ). 1284 */ 1285 static FT_Error find_unicode_charmap(FT_Face face)1286 find_unicode_charmap( FT_Face face ) 1287 { 1288 FT_CharMap* first; 1289 FT_CharMap* cur; 1290 1291 1292 /* caller should have already checked that `face' is valid */ 1293 FT_ASSERT( face ); 1294 1295 first = face->charmaps; 1296 1297 if ( !first ) 1298 return FT_THROW( Invalid_CharMap_Handle ); 1299 1300 /* 1301 * The original TrueType specification(s) only specified charmap 1302 * formats that are capable of mapping 8 or 16 bit character codes to 1303 * glyph indices. 1304 * 1305 * However, recent updates to the Apple and OpenType specifications 1306 * introduced new formats that are capable of mapping 32-bit character 1307 * codes as well. And these are already used on some fonts, mainly to 1308 * map non-BMP Asian ideographs as defined in Unicode. 1309 * 1310 * For compatibility purposes, these fonts generally come with 1311 * *several* Unicode charmaps: 1312 * 1313 * - One of them in the "old" 16-bit format, that cannot access 1314 * all glyphs in the font. 1315 * 1316 * - Another one in the "new" 32-bit format, that can access all 1317 * the glyphs. 1318 * 1319 * This function has been written to always favor a 32-bit charmap 1320 * when found. Otherwise, a 16-bit one is returned when found. 1321 */ 1322 1323 /* Since the `interesting' table, with IDs (3,10), is normally the */ 1324 /* last one, we loop backwards. This loses with type1 fonts with */ 1325 /* non-BMP characters (<.0001%), this wins with .ttf with non-BMP */ 1326 /* chars (.01% ?), and this is the same about 99.99% of the time! */ 1327 1328 cur = first + face->num_charmaps; /* points after the last one */ 1329 1330 for ( ; --cur >= first; ) 1331 { 1332 if ( cur[0]->encoding == FT_ENCODING_UNICODE ) 1333 { 1334 /* XXX If some new encodings to represent UCS-4 are added, */ 1335 /* they should be added here. */ 1336 if ( ( cur[0]->platform_id == TT_PLATFORM_MICROSOFT && 1337 cur[0]->encoding_id == TT_MS_ID_UCS_4 ) || 1338 ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE && 1339 cur[0]->encoding_id == TT_APPLE_ID_UNICODE_32 ) ) 1340 { 1341 face->charmap = cur[0]; 1342 return FT_Err_Ok; 1343 } 1344 } 1345 } 1346 1347 /* We do not have any UCS-4 charmap. */ 1348 /* Do the loop again and search for UCS-2 charmaps. */ 1349 cur = first + face->num_charmaps; 1350 1351 for ( ; --cur >= first; ) 1352 { 1353 if ( cur[0]->encoding == FT_ENCODING_UNICODE ) 1354 { 1355 face->charmap = cur[0]; 1356 return FT_Err_Ok; 1357 } 1358 } 1359 1360 return FT_THROW( Invalid_CharMap_Handle ); 1361 } 1362 1363 1364 /************************************************************************** 1365 * 1366 * @Function: 1367 * find_variant_selector_charmap 1368 * 1369 * @Description: 1370 * This function finds the variant selector charmap, if there is one. 1371 * There can only be one (platform=0, specific=5, format=14). 1372 */ 1373 static FT_CharMap find_variant_selector_charmap(FT_Face face)1374 find_variant_selector_charmap( FT_Face face ) 1375 { 1376 FT_CharMap* first; 1377 FT_CharMap* end; 1378 FT_CharMap* cur; 1379 1380 1381 /* caller should have already checked that `face' is valid */ 1382 FT_ASSERT( face ); 1383 1384 first = face->charmaps; 1385 1386 if ( !first ) 1387 return NULL; 1388 1389 end = first + face->num_charmaps; /* points after the last one */ 1390 1391 for ( cur = first; cur < end; cur++ ) 1392 { 1393 if ( cur[0]->platform_id == TT_PLATFORM_APPLE_UNICODE && 1394 cur[0]->encoding_id == TT_APPLE_ID_VARIANT_SELECTOR && 1395 FT_Get_CMap_Format( cur[0] ) == 14 ) 1396 return cur[0]; 1397 } 1398 1399 return NULL; 1400 } 1401 1402 1403 /************************************************************************** 1404 * 1405 * @Function: 1406 * open_face 1407 * 1408 * @Description: 1409 * This function does some work for FT_Open_Face(). 1410 */ 1411 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)1412 open_face( FT_Driver driver, 1413 FT_Stream *astream, 1414 FT_Bool external_stream, 1415 FT_Long face_index, 1416 FT_Int num_params, 1417 FT_Parameter* params, 1418 FT_Face *aface ) 1419 { 1420 FT_Memory memory; 1421 FT_Driver_Class clazz; 1422 FT_Face face = NULL; 1423 FT_Face_Internal internal = NULL; 1424 1425 FT_Error error, error2; 1426 1427 1428 clazz = driver->clazz; 1429 memory = driver->root.memory; 1430 1431 /* allocate the face object and perform basic initialization */ 1432 if ( FT_ALLOC( face, clazz->face_object_size ) ) 1433 goto Fail; 1434 1435 face->driver = driver; 1436 face->memory = memory; 1437 face->stream = *astream; 1438 1439 /* set the FT_FACE_FLAG_EXTERNAL_STREAM bit for FT_Done_Face */ 1440 if ( external_stream ) 1441 face->face_flags |= FT_FACE_FLAG_EXTERNAL_STREAM; 1442 1443 if ( FT_NEW( internal ) ) 1444 goto Fail; 1445 1446 face->internal = internal; 1447 1448 #ifdef FT_CONFIG_OPTION_INCREMENTAL 1449 { 1450 int i; 1451 1452 1453 face->internal->incremental_interface = NULL; 1454 for ( i = 0; i < num_params && !face->internal->incremental_interface; 1455 i++ ) 1456 if ( params[i].tag == FT_PARAM_TAG_INCREMENTAL ) 1457 face->internal->incremental_interface = 1458 (FT_Incremental_Interface)params[i].data; 1459 } 1460 #endif 1461 1462 face->internal->random_seed = -1; 1463 1464 if ( clazz->init_face ) 1465 error = clazz->init_face( *astream, 1466 face, 1467 (FT_Int)face_index, 1468 num_params, 1469 params ); 1470 *astream = face->stream; /* Stream may have been changed. */ 1471 if ( error ) 1472 goto Fail; 1473 1474 /* select Unicode charmap by default */ 1475 error2 = find_unicode_charmap( face ); 1476 1477 /* if no Unicode charmap can be found, FT_Err_Invalid_CharMap_Handle */ 1478 /* is returned. */ 1479 1480 /* no error should happen, but we want to play safe */ 1481 if ( error2 && FT_ERR_NEQ( error2, Invalid_CharMap_Handle ) ) 1482 { 1483 error = error2; 1484 goto Fail; 1485 } 1486 1487 *aface = face; 1488 1489 Fail: 1490 if ( error ) 1491 { 1492 destroy_charmaps( face, memory ); 1493 if ( clazz->done_face ) 1494 clazz->done_face( face ); 1495 FT_FREE( internal ); 1496 FT_FREE( face ); 1497 *aface = NULL; 1498 } 1499 1500 return error; 1501 } 1502 1503 1504 /* there's a Mac-specific extended implementation of FT_New_Face() */ 1505 /* in src/base/ftmac.c */ 1506 1507 #ifndef FT_MACINTOSH 1508 1509 /* documentation is in freetype.h */ 1510 1511 FT_EXPORT_DEF( FT_Error ) FT_New_Face(FT_Library library,const char * pathname,FT_Long face_index,FT_Face * aface)1512 FT_New_Face( FT_Library library, 1513 const char* pathname, 1514 FT_Long face_index, 1515 FT_Face *aface ) 1516 { 1517 FT_Open_Args args; 1518 1519 1520 /* test for valid `library' and `aface' delayed to `FT_Open_Face' */ 1521 if ( !pathname ) 1522 return FT_THROW( Invalid_Argument ); 1523 1524 args.flags = FT_OPEN_PATHNAME; 1525 args.pathname = (char*)pathname; 1526 args.stream = NULL; 1527 1528 return ft_open_face_internal( library, &args, face_index, aface, 1 ); 1529 } 1530 1531 #endif 1532 1533 1534 /* documentation is in freetype.h */ 1535 1536 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)1537 FT_New_Memory_Face( FT_Library library, 1538 const FT_Byte* file_base, 1539 FT_Long file_size, 1540 FT_Long face_index, 1541 FT_Face *aface ) 1542 { 1543 FT_Open_Args args; 1544 1545 1546 /* test for valid `library' and `face' delayed to `FT_Open_Face' */ 1547 if ( !file_base ) 1548 return FT_THROW( Invalid_Argument ); 1549 1550 args.flags = FT_OPEN_MEMORY; 1551 args.memory_base = file_base; 1552 args.memory_size = file_size; 1553 args.stream = NULL; 1554 1555 return ft_open_face_internal( library, &args, face_index, aface, 1 ); 1556 } 1557 1558 1559 #ifdef FT_CONFIG_OPTION_MAC_FONTS 1560 1561 /* The behavior here is very similar to that in base/ftmac.c, but it */ 1562 /* is designed to work on non-mac systems, so no mac specific calls. */ 1563 /* */ 1564 /* We look at the file and determine if it is a mac dfont file or a mac */ 1565 /* resource file, or a macbinary file containing a mac resource file. */ 1566 /* */ 1567 /* Unlike ftmac I'm not going to look at a `FOND'. I don't really see */ 1568 /* the point, especially since there may be multiple `FOND' resources. */ 1569 /* Instead I'll just look for `sfnt' and `POST' resources, ordered as */ 1570 /* they occur in the file. */ 1571 /* */ 1572 /* Note that multiple `POST' resources do not mean multiple postscript */ 1573 /* fonts; they all get jammed together to make what is essentially a */ 1574 /* pfb file. */ 1575 /* */ 1576 /* We aren't interested in `NFNT' or `FONT' bitmap resources. */ 1577 /* */ 1578 /* As soon as we get an `sfnt' load it into memory and pass it off to */ 1579 /* FT_Open_Face. */ 1580 /* */ 1581 /* If we have a (set of) `POST' resources, massage them into a (memory) */ 1582 /* pfb file and pass that to FT_Open_Face. (As with ftmac.c I'm not */ 1583 /* going to try to save the kerning info. After all that lives in the */ 1584 /* `FOND' which isn't in the file containing the `POST' resources so */ 1585 /* we don't really have access to it. */ 1586 1587 1588 /* Finalizer for a memory stream; gets called by FT_Done_Face(). */ 1589 /* It frees the memory it uses. */ 1590 /* From `ftmac.c'. */ 1591 static void memory_stream_close(FT_Stream stream)1592 memory_stream_close( FT_Stream stream ) 1593 { 1594 FT_Memory memory = stream->memory; 1595 1596 1597 FT_FREE( stream->base ); 1598 1599 stream->size = 0; 1600 stream->base = NULL; 1601 stream->close = NULL; 1602 } 1603 1604 1605 /* Create a new memory stream from a buffer and a size. */ 1606 /* From `ftmac.c'. */ 1607 static FT_Error new_memory_stream(FT_Library library,FT_Byte * base,FT_ULong size,FT_Stream_CloseFunc close,FT_Stream * astream)1608 new_memory_stream( FT_Library library, 1609 FT_Byte* base, 1610 FT_ULong size, 1611 FT_Stream_CloseFunc close, 1612 FT_Stream *astream ) 1613 { 1614 FT_Error error; 1615 FT_Memory memory; 1616 FT_Stream stream = NULL; 1617 1618 1619 if ( !library ) 1620 return FT_THROW( Invalid_Library_Handle ); 1621 1622 if ( !base ) 1623 return FT_THROW( Invalid_Argument ); 1624 1625 *astream = NULL; 1626 memory = library->memory; 1627 if ( FT_NEW( stream ) ) 1628 goto Exit; 1629 1630 FT_Stream_OpenMemory( stream, base, size ); 1631 1632 stream->close = close; 1633 1634 *astream = stream; 1635 1636 Exit: 1637 return error; 1638 } 1639 1640 1641 /* Create a new FT_Face given a buffer and a driver name. */ 1642 /* From `ftmac.c'. */ 1643 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)1644 open_face_from_buffer( FT_Library library, 1645 FT_Byte* base, 1646 FT_ULong size, 1647 FT_Long face_index, 1648 const char* driver_name, 1649 FT_Face *aface ) 1650 { 1651 FT_Open_Args args; 1652 FT_Error error; 1653 FT_Stream stream = NULL; 1654 FT_Memory memory = library->memory; 1655 1656 1657 error = new_memory_stream( library, 1658 base, 1659 size, 1660 memory_stream_close, 1661 &stream ); 1662 if ( error ) 1663 { 1664 FT_FREE( base ); 1665 return error; 1666 } 1667 1668 args.flags = FT_OPEN_STREAM; 1669 args.stream = stream; 1670 if ( driver_name ) 1671 { 1672 args.flags = args.flags | FT_OPEN_DRIVER; 1673 args.driver = FT_Get_Module( library, driver_name ); 1674 } 1675 1676 #ifdef FT_MACINTOSH 1677 /* At this point, the face index has served its purpose; */ 1678 /* whoever calls this function has already used it to */ 1679 /* locate the correct font data. We should not propagate */ 1680 /* this index to FT_Open_Face() (unless it is negative). */ 1681 1682 if ( face_index > 0 ) 1683 face_index &= 0x7FFF0000L; /* retain GX data */ 1684 #endif 1685 1686 error = ft_open_face_internal( library, &args, face_index, aface, 0 ); 1687 1688 if ( !error ) 1689 (*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM; 1690 else 1691 #ifdef FT_MACINTOSH 1692 FT_Stream_Free( stream, 0 ); 1693 #else 1694 { 1695 FT_Stream_Close( stream ); 1696 FT_FREE( stream ); 1697 } 1698 #endif 1699 1700 return error; 1701 } 1702 1703 1704 /* Look up `TYP1' or `CID ' table from sfnt table directory. */ 1705 /* `offset' and `length' must exclude the binary header in tables. */ 1706 1707 /* Type 1 and CID-keyed font drivers should recognize sfnt-wrapped */ 1708 /* format too. Here, since we can't expect that the TrueType font */ 1709 /* driver is loaded unconditionally, we must parse the font by */ 1710 /* ourselves. We are only interested in the name of the table and */ 1711 /* the offset. */ 1712 1713 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)1714 ft_lookup_PS_in_sfnt_stream( FT_Stream stream, 1715 FT_Long face_index, 1716 FT_ULong* offset, 1717 FT_ULong* length, 1718 FT_Bool* is_sfnt_cid ) 1719 { 1720 FT_Error error; 1721 FT_UShort numTables; 1722 FT_Long pstable_index; 1723 FT_ULong tag; 1724 int i; 1725 1726 1727 *offset = 0; 1728 *length = 0; 1729 *is_sfnt_cid = FALSE; 1730 1731 /* TODO: support for sfnt-wrapped PS/CID in TTC format */ 1732 1733 /* version check for 'typ1' (should be ignored?) */ 1734 if ( FT_READ_ULONG( tag ) ) 1735 return error; 1736 if ( tag != TTAG_typ1 ) 1737 return FT_THROW( Unknown_File_Format ); 1738 1739 if ( FT_READ_USHORT( numTables ) ) 1740 return error; 1741 if ( FT_STREAM_SKIP( 2 * 3 ) ) /* skip binary search header */ 1742 return error; 1743 1744 pstable_index = -1; 1745 *is_sfnt_cid = FALSE; 1746 1747 for ( i = 0; i < numTables; i++ ) 1748 { 1749 if ( FT_READ_ULONG( tag ) || FT_STREAM_SKIP( 4 ) || 1750 FT_READ_ULONG( *offset ) || FT_READ_ULONG( *length ) ) 1751 return error; 1752 1753 if ( tag == TTAG_CID ) 1754 { 1755 pstable_index++; 1756 *offset += 22; 1757 *length -= 22; 1758 *is_sfnt_cid = TRUE; 1759 if ( face_index < 0 ) 1760 return FT_Err_Ok; 1761 } 1762 else if ( tag == TTAG_TYP1 ) 1763 { 1764 pstable_index++; 1765 *offset += 24; 1766 *length -= 24; 1767 *is_sfnt_cid = FALSE; 1768 if ( face_index < 0 ) 1769 return FT_Err_Ok; 1770 } 1771 if ( face_index >= 0 && pstable_index == face_index ) 1772 return FT_Err_Ok; 1773 } 1774 1775 return FT_THROW( Table_Missing ); 1776 } 1777 1778 1779 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)1780 open_face_PS_from_sfnt_stream( FT_Library library, 1781 FT_Stream stream, 1782 FT_Long face_index, 1783 FT_Int num_params, 1784 FT_Parameter *params, 1785 FT_Face *aface ) 1786 { 1787 FT_Error error; 1788 FT_Memory memory = library->memory; 1789 FT_ULong offset, length; 1790 FT_ULong pos; 1791 FT_Bool is_sfnt_cid; 1792 FT_Byte* sfnt_ps = NULL; 1793 1794 FT_UNUSED( num_params ); 1795 FT_UNUSED( params ); 1796 1797 1798 /* ignore GX stuff */ 1799 if ( face_index > 0 ) 1800 face_index &= 0xFFFFL; 1801 1802 pos = FT_STREAM_POS(); 1803 1804 error = ft_lookup_PS_in_sfnt_stream( stream, 1805 face_index, 1806 &offset, 1807 &length, 1808 &is_sfnt_cid ); 1809 if ( error ) 1810 goto Exit; 1811 1812 if ( offset > stream->size ) 1813 { 1814 FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table offset\n" )); 1815 error = FT_THROW( Invalid_Table ); 1816 goto Exit; 1817 } 1818 else if ( length > stream->size - offset ) 1819 { 1820 FT_TRACE2(( "open_face_PS_from_sfnt_stream: invalid table length\n" )); 1821 error = FT_THROW( Invalid_Table ); 1822 goto Exit; 1823 } 1824 1825 error = FT_Stream_Seek( stream, pos + offset ); 1826 if ( error ) 1827 goto Exit; 1828 1829 if ( FT_QALLOC( sfnt_ps, (FT_Long)length ) ) 1830 goto Exit; 1831 1832 error = FT_Stream_Read( stream, (FT_Byte *)sfnt_ps, length ); 1833 if ( error ) 1834 { 1835 FT_FREE( sfnt_ps ); 1836 goto Exit; 1837 } 1838 1839 error = open_face_from_buffer( library, 1840 sfnt_ps, 1841 length, 1842 FT_MIN( face_index, 0 ), 1843 is_sfnt_cid ? "cid" : "type1", 1844 aface ); 1845 Exit: 1846 { 1847 FT_Error error1; 1848 1849 1850 if ( FT_ERR_EQ( error, Unknown_File_Format ) ) 1851 { 1852 error1 = FT_Stream_Seek( stream, pos ); 1853 if ( error1 ) 1854 return error1; 1855 } 1856 1857 return error; 1858 } 1859 } 1860 1861 1862 #ifndef FT_MACINTOSH 1863 1864 /* The resource header says we've got resource_cnt `POST' (type1) */ 1865 /* resources in this file. They all need to be coalesced into */ 1866 /* one lump which gets passed on to the type1 driver. */ 1867 /* Here can be only one PostScript font in a file so face_index */ 1868 /* must be 0 (or -1). */ 1869 /* */ 1870 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)1871 Mac_Read_POST_Resource( FT_Library library, 1872 FT_Stream stream, 1873 FT_Long *offsets, 1874 FT_Long resource_cnt, 1875 FT_Long face_index, 1876 FT_Face *aface ) 1877 { 1878 FT_Error error = FT_ERR( Cannot_Open_Resource ); 1879 FT_Memory memory = library->memory; 1880 1881 FT_Byte* pfb_data = NULL; 1882 int i, type, flags; 1883 FT_ULong len; 1884 FT_ULong pfb_len, pfb_pos, pfb_lenpos; 1885 FT_ULong rlen, temp; 1886 1887 1888 if ( face_index == -1 ) 1889 face_index = 0; 1890 if ( face_index != 0 ) 1891 return error; 1892 1893 /* Find the length of all the POST resources, concatenated. Assume */ 1894 /* worst case (each resource in its own section). */ 1895 pfb_len = 0; 1896 for ( i = 0; i < resource_cnt; i++ ) 1897 { 1898 error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] ); 1899 if ( error ) 1900 goto Exit; 1901 if ( FT_READ_ULONG( temp ) ) /* actually LONG */ 1902 goto Exit; 1903 1904 /* FT2 allocator takes signed long buffer length, 1905 * too large value causing overflow should be checked 1906 */ 1907 FT_TRACE4(( " POST fragment #%d: length=0x%08lx" 1908 " total pfb_len=0x%08lx\n", 1909 i, temp, pfb_len + temp + 6 )); 1910 1911 if ( FT_MAC_RFORK_MAX_LEN < temp || 1912 FT_MAC_RFORK_MAX_LEN - temp < pfb_len + 6 ) 1913 { 1914 FT_TRACE2(( " MacOS resource length cannot exceed" 1915 " 0x%08lx\n", 1916 FT_MAC_RFORK_MAX_LEN )); 1917 1918 error = FT_THROW( Invalid_Offset ); 1919 goto Exit; 1920 } 1921 1922 pfb_len += temp + 6; 1923 } 1924 1925 FT_TRACE2(( " total buffer size to concatenate" 1926 " %ld POST fragments: 0x%08lx\n", 1927 resource_cnt, pfb_len + 2 )); 1928 1929 if ( pfb_len + 2 < 6 ) 1930 { 1931 FT_TRACE2(( " too long fragment length makes" 1932 " pfb_len confused: pfb_len=0x%08lx\n", 1933 pfb_len )); 1934 1935 error = FT_THROW( Array_Too_Large ); 1936 goto Exit; 1937 } 1938 1939 if ( FT_QALLOC( pfb_data, (FT_Long)pfb_len + 2 ) ) 1940 goto Exit; 1941 1942 pfb_data[0] = 0x80; 1943 pfb_data[1] = 1; /* Ascii section */ 1944 pfb_data[2] = 0; /* 4-byte length, fill in later */ 1945 pfb_data[3] = 0; 1946 pfb_data[4] = 0; 1947 pfb_data[5] = 0; 1948 pfb_pos = 6; 1949 pfb_lenpos = 2; 1950 1951 len = 0; 1952 type = 1; 1953 1954 for ( i = 0; i < resource_cnt; i++ ) 1955 { 1956 error = FT_Stream_Seek( stream, (FT_ULong)offsets[i] ); 1957 if ( error ) 1958 goto Exit2; 1959 if ( FT_READ_ULONG( rlen ) ) 1960 goto Exit2; 1961 1962 /* FT2 allocator takes signed long buffer length, 1963 * too large fragment length causing overflow should be checked 1964 */ 1965 if ( 0x7FFFFFFFUL < rlen ) 1966 { 1967 error = FT_THROW( Invalid_Offset ); 1968 goto Exit2; 1969 } 1970 1971 if ( FT_READ_USHORT( flags ) ) 1972 goto Exit2; 1973 1974 FT_TRACE3(( "POST fragment[%d]:" 1975 " offsets=0x%08lx, rlen=0x%08lx, flags=0x%04x\n", 1976 i, offsets[i], rlen, flags )); 1977 1978 error = FT_ERR( Array_Too_Large ); 1979 1980 /* postpone the check of `rlen longer than buffer' */ 1981 /* until `FT_Stream_Read' */ 1982 1983 if ( ( flags >> 8 ) == 0 ) /* Comment, should not be loaded */ 1984 { 1985 FT_TRACE3(( " Skip POST fragment #%d because it is a comment\n", 1986 i )); 1987 continue; 1988 } 1989 1990 /* the flags are part of the resource, so rlen >= 2, */ 1991 /* but some fonts declare rlen = 0 for empty fragment */ 1992 if ( rlen > 2 ) 1993 rlen -= 2; 1994 else 1995 rlen = 0; 1996 1997 if ( ( flags >> 8 ) == type ) 1998 len += rlen; 1999 else 2000 { 2001 FT_TRACE3(( " Write POST fragment #%d header (4-byte) to buffer" 2002 " %p + 0x%08lx\n", 2003 i, (void*)pfb_data, pfb_lenpos )); 2004 2005 if ( pfb_lenpos + 3 > pfb_len + 2 ) 2006 goto Exit2; 2007 2008 pfb_data[pfb_lenpos ] = (FT_Byte)( len ); 2009 pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 ); 2010 pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 ); 2011 pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 ); 2012 2013 if ( ( flags >> 8 ) == 5 ) /* End of font mark */ 2014 break; 2015 2016 FT_TRACE3(( " Write POST fragment #%d header (6-byte) to buffer" 2017 " %p + 0x%08lx\n", 2018 i, (void*)pfb_data, pfb_pos )); 2019 2020 if ( pfb_pos + 6 > pfb_len + 2 ) 2021 goto Exit2; 2022 2023 pfb_data[pfb_pos++] = 0x80; 2024 2025 type = flags >> 8; 2026 len = rlen; 2027 2028 pfb_data[pfb_pos++] = (FT_Byte)type; 2029 pfb_lenpos = pfb_pos; 2030 pfb_data[pfb_pos++] = 0; /* 4-byte length, fill in later */ 2031 pfb_data[pfb_pos++] = 0; 2032 pfb_data[pfb_pos++] = 0; 2033 pfb_data[pfb_pos++] = 0; 2034 } 2035 2036 if ( pfb_pos > pfb_len || pfb_pos + rlen > pfb_len ) 2037 goto Exit2; 2038 2039 FT_TRACE3(( " Load POST fragment #%d (%ld byte) to buffer" 2040 " %p + 0x%08lx\n", 2041 i, rlen, (void*)pfb_data, pfb_pos )); 2042 2043 error = FT_Stream_Read( stream, (FT_Byte *)pfb_data + pfb_pos, rlen ); 2044 if ( error ) 2045 goto Exit2; 2046 2047 pfb_pos += rlen; 2048 } 2049 2050 error = FT_ERR( Array_Too_Large ); 2051 2052 if ( pfb_pos + 2 > pfb_len + 2 ) 2053 goto Exit2; 2054 pfb_data[pfb_pos++] = 0x80; 2055 pfb_data[pfb_pos++] = 3; 2056 2057 if ( pfb_lenpos + 3 > pfb_len + 2 ) 2058 goto Exit2; 2059 pfb_data[pfb_lenpos ] = (FT_Byte)( len ); 2060 pfb_data[pfb_lenpos + 1] = (FT_Byte)( len >> 8 ); 2061 pfb_data[pfb_lenpos + 2] = (FT_Byte)( len >> 16 ); 2062 pfb_data[pfb_lenpos + 3] = (FT_Byte)( len >> 24 ); 2063 2064 return open_face_from_buffer( library, 2065 pfb_data, 2066 pfb_pos, 2067 face_index, 2068 "type1", 2069 aface ); 2070 2071 Exit2: 2072 if ( FT_ERR_EQ( error, Array_Too_Large ) ) 2073 FT_TRACE2(( " Abort due to too-short buffer to store" 2074 " all POST fragments\n" )); 2075 else if ( FT_ERR_EQ( error, Invalid_Offset ) ) 2076 FT_TRACE2(( " Abort due to invalid offset in a POST fragment\n" )); 2077 2078 if ( error ) 2079 error = FT_ERR( Cannot_Open_Resource ); 2080 FT_FREE( pfb_data ); 2081 2082 Exit: 2083 return error; 2084 } 2085 2086 2087 /* The resource header says we've got resource_cnt `sfnt' */ 2088 /* (TrueType/OpenType) resources in this file. Look through */ 2089 /* them for the one indicated by face_index, load it into mem, */ 2090 /* pass it on to the truetype driver, and return it. */ 2091 /* */ 2092 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)2093 Mac_Read_sfnt_Resource( FT_Library library, 2094 FT_Stream stream, 2095 FT_Long *offsets, 2096 FT_Long resource_cnt, 2097 FT_Long face_index, 2098 FT_Face *aface ) 2099 { 2100 FT_Memory memory = library->memory; 2101 FT_Byte* sfnt_data = NULL; 2102 FT_Error error; 2103 FT_ULong flag_offset; 2104 FT_Long rlen; 2105 int is_cff; 2106 FT_Long face_index_in_resource = 0; 2107 2108 2109 if ( face_index < 0 ) 2110 face_index = -face_index - 1; 2111 if ( face_index >= resource_cnt ) 2112 return FT_THROW( Cannot_Open_Resource ); 2113 2114 flag_offset = (FT_ULong)offsets[face_index]; 2115 error = FT_Stream_Seek( stream, flag_offset ); 2116 if ( error ) 2117 goto Exit; 2118 2119 if ( FT_READ_LONG( rlen ) ) 2120 goto Exit; 2121 if ( rlen < 1 ) 2122 return FT_THROW( Cannot_Open_Resource ); 2123 if ( (FT_ULong)rlen > FT_MAC_RFORK_MAX_LEN ) 2124 return FT_THROW( Invalid_Offset ); 2125 2126 error = open_face_PS_from_sfnt_stream( library, 2127 stream, 2128 face_index, 2129 0, NULL, 2130 aface ); 2131 if ( !error ) 2132 goto Exit; 2133 2134 /* rewind sfnt stream before open_face_PS_from_sfnt_stream() */ 2135 error = FT_Stream_Seek( stream, flag_offset + 4 ); 2136 if ( error ) 2137 goto Exit; 2138 2139 if ( FT_QALLOC( sfnt_data, rlen ) ) 2140 return error; 2141 error = FT_Stream_Read( stream, (FT_Byte *)sfnt_data, (FT_ULong)rlen ); 2142 if ( error ) { 2143 FT_FREE( sfnt_data ); 2144 goto Exit; 2145 } 2146 2147 is_cff = rlen > 4 && !ft_memcmp( sfnt_data, "OTTO", 4 ); 2148 error = open_face_from_buffer( library, 2149 sfnt_data, 2150 (FT_ULong)rlen, 2151 face_index_in_resource, 2152 is_cff ? "cff" : "truetype", 2153 aface ); 2154 2155 Exit: 2156 return error; 2157 } 2158 2159 2160 /* Check for a valid resource fork header, or a valid dfont */ 2161 /* header. In a resource fork the first 16 bytes are repeated */ 2162 /* at the location specified by bytes 4-7. In a dfont bytes */ 2163 /* 4-7 point to 16 bytes of zeroes instead. */ 2164 /* */ 2165 static FT_Error IsMacResource(FT_Library library,FT_Stream stream,FT_Long resource_offset,FT_Long face_index,FT_Face * aface)2166 IsMacResource( FT_Library library, 2167 FT_Stream stream, 2168 FT_Long resource_offset, 2169 FT_Long face_index, 2170 FT_Face *aface ) 2171 { 2172 FT_Memory memory = library->memory; 2173 FT_Error error; 2174 FT_Long map_offset, rdata_pos; 2175 FT_Long *data_offsets; 2176 FT_Long count; 2177 2178 2179 error = FT_Raccess_Get_HeaderInfo( library, stream, resource_offset, 2180 &map_offset, &rdata_pos ); 2181 if ( error ) 2182 return error; 2183 2184 /* POST resources must be sorted to concatenate properly */ 2185 error = FT_Raccess_Get_DataOffsets( library, stream, 2186 map_offset, rdata_pos, 2187 TTAG_POST, TRUE, 2188 &data_offsets, &count ); 2189 if ( !error ) 2190 { 2191 error = Mac_Read_POST_Resource( library, stream, data_offsets, count, 2192 face_index, aface ); 2193 FT_FREE( data_offsets ); 2194 /* POST exists in an LWFN providing a single face */ 2195 if ( !error ) 2196 (*aface)->num_faces = 1; 2197 return error; 2198 } 2199 2200 /* sfnt resources should not be sorted to preserve the face order by 2201 QuickDraw API */ 2202 error = FT_Raccess_Get_DataOffsets( library, stream, 2203 map_offset, rdata_pos, 2204 TTAG_sfnt, FALSE, 2205 &data_offsets, &count ); 2206 if ( !error ) 2207 { 2208 FT_Long face_index_internal = face_index % count; 2209 2210 2211 error = Mac_Read_sfnt_Resource( library, stream, data_offsets, count, 2212 face_index_internal, aface ); 2213 FT_FREE( data_offsets ); 2214 if ( !error ) 2215 (*aface)->num_faces = count; 2216 } 2217 2218 return error; 2219 } 2220 2221 2222 /* Check for a valid macbinary header, and if we find one */ 2223 /* check that the (flattened) resource fork in it is valid. */ 2224 /* */ 2225 static FT_Error IsMacBinary(FT_Library library,FT_Stream stream,FT_Long face_index,FT_Face * aface)2226 IsMacBinary( FT_Library library, 2227 FT_Stream stream, 2228 FT_Long face_index, 2229 FT_Face *aface ) 2230 { 2231 unsigned char header[128]; 2232 FT_Error error; 2233 FT_Long dlen, offset; 2234 2235 2236 if ( !stream ) 2237 return FT_THROW( Invalid_Stream_Operation ); 2238 2239 error = FT_Stream_Seek( stream, 0 ); 2240 if ( error ) 2241 goto Exit; 2242 2243 error = FT_Stream_Read( stream, (FT_Byte*)header, 128 ); 2244 if ( error ) 2245 goto Exit; 2246 2247 if ( header[ 0] != 0 || 2248 header[74] != 0 || 2249 header[82] != 0 || 2250 header[ 1] == 0 || 2251 header[ 1] > 33 || 2252 header[63] != 0 || 2253 header[2 + header[1]] != 0 || 2254 header[0x53] > 0x7F ) 2255 return FT_THROW( Unknown_File_Format ); 2256 2257 dlen = ( header[0x53] << 24 ) | 2258 ( header[0x54] << 16 ) | 2259 ( header[0x55] << 8 ) | 2260 header[0x56]; 2261 #if 0 2262 rlen = ( header[0x57] << 24 ) | 2263 ( header[0x58] << 16 ) | 2264 ( header[0x59] << 8 ) | 2265 header[0x5A]; 2266 #endif /* 0 */ 2267 offset = 128 + ( ( dlen + 127 ) & ~127 ); 2268 2269 return IsMacResource( library, stream, offset, face_index, aface ); 2270 2271 Exit: 2272 return error; 2273 } 2274 2275 2276 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)2277 load_face_in_embedded_rfork( FT_Library library, 2278 FT_Stream stream, 2279 FT_Long face_index, 2280 FT_Face *aface, 2281 const FT_Open_Args *args ) 2282 { 2283 2284 #undef FT_COMPONENT 2285 #define FT_COMPONENT raccess 2286 2287 FT_Memory memory = library->memory; 2288 FT_Error error = FT_ERR( Unknown_File_Format ); 2289 FT_UInt i; 2290 2291 char* file_names[FT_RACCESS_N_RULES]; 2292 FT_Long offsets[FT_RACCESS_N_RULES]; 2293 FT_Error errors[FT_RACCESS_N_RULES]; 2294 FT_Bool is_darwin_vfs, vfs_rfork_has_no_font = FALSE; /* not tested */ 2295 2296 FT_Open_Args args2; 2297 FT_Stream stream2 = NULL; 2298 2299 2300 FT_Raccess_Guess( library, stream, 2301 args->pathname, file_names, offsets, errors ); 2302 2303 for ( i = 0; i < FT_RACCESS_N_RULES; i++ ) 2304 { 2305 is_darwin_vfs = ft_raccess_rule_by_darwin_vfs( library, i ); 2306 if ( is_darwin_vfs && vfs_rfork_has_no_font ) 2307 { 2308 FT_TRACE3(( "Skip rule %d: darwin vfs resource fork" 2309 " is already checked and" 2310 " no font is found\n", 2311 i )); 2312 continue; 2313 } 2314 2315 if ( errors[i] ) 2316 { 2317 FT_TRACE3(( "Error 0x%x has occurred in rule %d\n", 2318 errors[i], i )); 2319 continue; 2320 } 2321 2322 args2.flags = FT_OPEN_PATHNAME; 2323 args2.pathname = file_names[i] ? file_names[i] : args->pathname; 2324 2325 FT_TRACE3(( "Try rule %d: %s (offset=%ld) ...", 2326 i, args2.pathname, offsets[i] )); 2327 2328 error = FT_Stream_New( library, &args2, &stream2 ); 2329 if ( is_darwin_vfs && FT_ERR_EQ( error, Cannot_Open_Stream ) ) 2330 vfs_rfork_has_no_font = TRUE; 2331 2332 if ( error ) 2333 { 2334 FT_TRACE3(( "failed\n" )); 2335 continue; 2336 } 2337 2338 error = IsMacResource( library, stream2, offsets[i], 2339 face_index, aface ); 2340 FT_Stream_Free( stream2, 0 ); 2341 2342 FT_TRACE3(( "%s\n", error ? "failed": "successful" )); 2343 2344 if ( !error ) 2345 break; 2346 else if ( is_darwin_vfs ) 2347 vfs_rfork_has_no_font = TRUE; 2348 } 2349 2350 for (i = 0; i < FT_RACCESS_N_RULES; i++) 2351 { 2352 if ( file_names[i] ) 2353 FT_FREE( file_names[i] ); 2354 } 2355 2356 /* Caller (load_mac_face) requires FT_Err_Unknown_File_Format. */ 2357 if ( error ) 2358 error = FT_ERR( Unknown_File_Format ); 2359 2360 return error; 2361 2362 #undef FT_COMPONENT 2363 #define FT_COMPONENT objs 2364 2365 } 2366 2367 2368 /* Check for some macintosh formats without Carbon framework. */ 2369 /* Is this a macbinary file? If so look at the resource fork. */ 2370 /* Is this a mac dfont file? */ 2371 /* Is this an old style resource fork? (in data) */ 2372 /* Else call load_face_in_embedded_rfork to try extra rules */ 2373 /* (defined in `ftrfork.c'). */ 2374 /* */ 2375 static FT_Error load_mac_face(FT_Library library,FT_Stream stream,FT_Long face_index,FT_Face * aface,const FT_Open_Args * args)2376 load_mac_face( FT_Library library, 2377 FT_Stream stream, 2378 FT_Long face_index, 2379 FT_Face *aface, 2380 const FT_Open_Args *args ) 2381 { 2382 FT_Error error; 2383 FT_UNUSED( args ); 2384 2385 2386 error = IsMacBinary( library, stream, face_index, aface ); 2387 if ( FT_ERR_EQ( error, Unknown_File_Format ) ) 2388 { 2389 2390 #undef FT_COMPONENT 2391 #define FT_COMPONENT raccess 2392 2393 #ifdef FT_DEBUG_LEVEL_TRACE 2394 FT_TRACE3(( "Try as dfont: " )); 2395 if ( !( args->flags & FT_OPEN_MEMORY ) ) 2396 FT_TRACE3(( "%s ...", args->pathname )); 2397 #endif 2398 2399 error = IsMacResource( library, stream, 0, face_index, aface ); 2400 2401 FT_TRACE3(( "%s\n", error ? "failed" : "successful" )); 2402 2403 #undef FT_COMPONENT 2404 #define FT_COMPONENT objs 2405 2406 } 2407 2408 if ( ( FT_ERR_EQ( error, Unknown_File_Format ) || 2409 FT_ERR_EQ( error, Invalid_Stream_Operation ) ) && 2410 ( args->flags & FT_OPEN_PATHNAME ) ) 2411 error = load_face_in_embedded_rfork( library, stream, 2412 face_index, aface, args ); 2413 return error; 2414 } 2415 #endif 2416 2417 #endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */ 2418 2419 2420 /* documentation is in freetype.h */ 2421 2422 FT_EXPORT_DEF( FT_Error ) FT_Open_Face(FT_Library library,const FT_Open_Args * args,FT_Long face_index,FT_Face * aface)2423 FT_Open_Face( FT_Library library, 2424 const FT_Open_Args* args, 2425 FT_Long face_index, 2426 FT_Face *aface ) 2427 { 2428 return ft_open_face_internal( library, args, face_index, aface, 1 ); 2429 } 2430 2431 2432 static FT_Error ft_open_face_internal(FT_Library library,const FT_Open_Args * args,FT_Long face_index,FT_Face * aface,FT_Bool test_mac_fonts)2433 ft_open_face_internal( FT_Library library, 2434 const FT_Open_Args* args, 2435 FT_Long face_index, 2436 FT_Face *aface, 2437 FT_Bool test_mac_fonts ) 2438 { 2439 FT_Error error; 2440 FT_Driver driver = NULL; 2441 FT_Memory memory = NULL; 2442 FT_Stream stream = NULL; 2443 FT_Face face = NULL; 2444 FT_ListNode node = NULL; 2445 FT_Bool external_stream; 2446 FT_Module* cur; 2447 FT_Module* limit; 2448 2449 #ifndef FT_CONFIG_OPTION_MAC_FONTS 2450 FT_UNUSED( test_mac_fonts ); 2451 #endif 2452 2453 /* only use lower 31 bits together with sign bit */ 2454 if ( face_index > 0 ) 2455 face_index &= 0x7FFFFFFFL; 2456 else 2457 { 2458 face_index &= 0x7FFFFFFFL; 2459 face_index = -face_index; 2460 } 2461 2462 #ifdef FT_DEBUG_LEVEL_TRACE 2463 FT_TRACE3(( "FT_Open_Face: " )); 2464 if ( face_index < 0 ) 2465 FT_TRACE3(( "Requesting number of faces and named instances\n")); 2466 else 2467 { 2468 FT_TRACE3(( "Requesting face %ld", face_index & 0xFFFFL )); 2469 if ( face_index & 0x7FFF0000L ) 2470 FT_TRACE3(( ", named instance %ld", face_index >> 16 )); 2471 FT_TRACE3(( "\n" )); 2472 } 2473 #endif 2474 2475 /* test for valid `library' delayed to `FT_Stream_New' */ 2476 2477 if ( ( !aface && face_index >= 0 ) || !args ) 2478 return FT_THROW( Invalid_Argument ); 2479 2480 external_stream = FT_BOOL( ( args->flags & FT_OPEN_STREAM ) && 2481 args->stream ); 2482 2483 /* create input stream */ 2484 error = FT_Stream_New( library, args, &stream ); 2485 if ( error ) 2486 goto Fail3; 2487 2488 memory = library->memory; 2489 2490 /* If the font driver is specified in the `args' structure, use */ 2491 /* it. Otherwise, we scan the list of registered drivers. */ 2492 if ( ( args->flags & FT_OPEN_DRIVER ) && args->driver ) 2493 { 2494 driver = FT_DRIVER( args->driver ); 2495 2496 /* not all modules are drivers, so check... */ 2497 if ( FT_MODULE_IS_DRIVER( driver ) ) 2498 { 2499 FT_Int num_params = 0; 2500 FT_Parameter* params = NULL; 2501 2502 2503 if ( args->flags & FT_OPEN_PARAMS ) 2504 { 2505 num_params = args->num_params; 2506 params = args->params; 2507 } 2508 2509 error = open_face( driver, &stream, external_stream, face_index, 2510 num_params, params, &face ); 2511 if ( !error ) 2512 goto Success; 2513 } 2514 else 2515 error = FT_THROW( Invalid_Handle ); 2516 2517 FT_Stream_Free( stream, external_stream ); 2518 goto Fail; 2519 } 2520 else 2521 { 2522 error = FT_ERR( Missing_Module ); 2523 2524 /* check each font driver for an appropriate format */ 2525 cur = library->modules; 2526 limit = cur + library->num_modules; 2527 2528 for ( ; cur < limit; cur++ ) 2529 { 2530 /* not all modules are font drivers, so check... */ 2531 if ( FT_MODULE_IS_DRIVER( cur[0] ) ) 2532 { 2533 FT_Int num_params = 0; 2534 FT_Parameter* params = NULL; 2535 2536 2537 driver = FT_DRIVER( cur[0] ); 2538 2539 if ( args->flags & FT_OPEN_PARAMS ) 2540 { 2541 num_params = args->num_params; 2542 params = args->params; 2543 } 2544 2545 error = open_face( driver, &stream, external_stream, face_index, 2546 num_params, params, &face ); 2547 if ( !error ) 2548 goto Success; 2549 2550 #ifdef FT_CONFIG_OPTION_MAC_FONTS 2551 if ( test_mac_fonts && 2552 ft_strcmp( cur[0]->clazz->module_name, "truetype" ) == 0 && 2553 FT_ERR_EQ( error, Table_Missing ) ) 2554 { 2555 /* TrueType but essential tables are missing */ 2556 error = FT_Stream_Seek( stream, 0 ); 2557 if ( error ) 2558 break; 2559 2560 error = open_face_PS_from_sfnt_stream( library, 2561 stream, 2562 face_index, 2563 num_params, 2564 params, 2565 aface ); 2566 if ( !error ) 2567 { 2568 FT_Stream_Free( stream, external_stream ); 2569 return error; 2570 } 2571 } 2572 #endif 2573 2574 if ( FT_ERR_NEQ( error, Unknown_File_Format ) ) 2575 goto Fail3; 2576 } 2577 } 2578 2579 Fail3: 2580 /* If we are on the mac, and we get an */ 2581 /* FT_Err_Invalid_Stream_Operation it may be because we have an */ 2582 /* empty data fork, so we need to check the resource fork. */ 2583 if ( FT_ERR_NEQ( error, Cannot_Open_Stream ) && 2584 FT_ERR_NEQ( error, Unknown_File_Format ) && 2585 FT_ERR_NEQ( error, Invalid_Stream_Operation ) ) 2586 goto Fail2; 2587 2588 #if !defined( FT_MACINTOSH ) && defined( FT_CONFIG_OPTION_MAC_FONTS ) 2589 if ( test_mac_fonts ) 2590 { 2591 error = load_mac_face( library, stream, face_index, aface, args ); 2592 if ( !error ) 2593 { 2594 /* We don't want to go to Success here. We've already done */ 2595 /* that. On the other hand, if we succeeded we still need to */ 2596 /* close this stream (we opened a different stream which */ 2597 /* extracted the interesting information out of this stream */ 2598 /* here. That stream will still be open and the face will */ 2599 /* point to it). */ 2600 FT_Stream_Free( stream, external_stream ); 2601 return error; 2602 } 2603 } 2604 2605 if ( FT_ERR_NEQ( error, Unknown_File_Format ) ) 2606 goto Fail2; 2607 #endif /* !FT_MACINTOSH && FT_CONFIG_OPTION_MAC_FONTS */ 2608 2609 /* no driver is able to handle this format */ 2610 error = FT_THROW( Unknown_File_Format ); 2611 2612 Fail2: 2613 FT_Stream_Free( stream, external_stream ); 2614 goto Fail; 2615 } 2616 2617 Success: 2618 FT_TRACE4(( "FT_Open_Face: New face object, adding to list\n" )); 2619 2620 /* add the face object to its driver's list */ 2621 if ( FT_QNEW( node ) ) 2622 goto Fail; 2623 2624 node->data = face; 2625 /* don't assume driver is the same as face->driver, so use */ 2626 /* face->driver instead. */ 2627 FT_List_Add( &face->driver->faces_list, node ); 2628 2629 /* now allocate a glyph slot object for the face */ 2630 FT_TRACE4(( "FT_Open_Face: Creating glyph slot\n" )); 2631 2632 if ( face_index >= 0 ) 2633 { 2634 error = FT_New_GlyphSlot( face, NULL ); 2635 if ( error ) 2636 goto Fail; 2637 2638 /* finally, allocate a size object for the face */ 2639 { 2640 FT_Size size; 2641 2642 2643 FT_TRACE4(( "FT_Open_Face: Creating size object\n" )); 2644 2645 error = FT_New_Size( face, &size ); 2646 if ( error ) 2647 goto Fail; 2648 2649 face->size = size; 2650 } 2651 } 2652 2653 /* some checks */ 2654 2655 if ( FT_IS_SCALABLE( face ) ) 2656 { 2657 if ( face->height < 0 ) 2658 face->height = (FT_Short)-face->height; 2659 2660 if ( !FT_HAS_VERTICAL( face ) ) 2661 face->max_advance_height = (FT_Short)face->height; 2662 } 2663 2664 if ( FT_HAS_FIXED_SIZES( face ) ) 2665 { 2666 FT_Int i; 2667 2668 2669 for ( i = 0; i < face->num_fixed_sizes; i++ ) 2670 { 2671 FT_Bitmap_Size* bsize = face->available_sizes + i; 2672 2673 2674 if ( bsize->height < 0 ) 2675 bsize->height = -bsize->height; 2676 if ( bsize->x_ppem < 0 ) 2677 bsize->x_ppem = -bsize->x_ppem; 2678 if ( bsize->y_ppem < 0 ) 2679 bsize->y_ppem = -bsize->y_ppem; 2680 2681 /* check whether negation actually has worked */ 2682 if ( bsize->height < 0 || bsize->x_ppem < 0 || bsize->y_ppem < 0 ) 2683 { 2684 FT_TRACE0(( "FT_Open_Face:" 2685 " Invalid bitmap dimensions for strike %d," 2686 " now disabled\n", i )); 2687 bsize->width = 0; 2688 bsize->height = 0; 2689 bsize->size = 0; 2690 bsize->x_ppem = 0; 2691 bsize->y_ppem = 0; 2692 } 2693 } 2694 } 2695 2696 /* initialize internal face data */ 2697 { 2698 FT_Face_Internal internal = face->internal; 2699 2700 2701 internal->transform_matrix.xx = 0x10000L; 2702 internal->transform_matrix.xy = 0; 2703 internal->transform_matrix.yx = 0; 2704 internal->transform_matrix.yy = 0x10000L; 2705 2706 internal->transform_delta.x = 0; 2707 internal->transform_delta.y = 0; 2708 2709 internal->refcount = 1; 2710 2711 internal->no_stem_darkening = -1; 2712 2713 #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING 2714 /* Per-face filtering can only be set up by FT_Face_Properties */ 2715 internal->lcd_filter_func = NULL; 2716 #endif 2717 } 2718 2719 if ( aface ) 2720 *aface = face; 2721 else 2722 FT_Done_Face( face ); 2723 2724 goto Exit; 2725 2726 Fail: 2727 if ( node ) 2728 FT_Done_Face( face ); /* face must be in the driver's list */ 2729 else if ( face ) 2730 destroy_face( memory, face, driver ); 2731 2732 Exit: 2733 #ifdef FT_DEBUG_LEVEL_TRACE 2734 if ( !error && face_index < 0 ) 2735 { 2736 FT_TRACE3(( "FT_Open_Face: The font has %ld face%s\n", 2737 face->num_faces, 2738 face->num_faces == 1 ? "" : "s" )); 2739 FT_TRACE3(( " and %ld named instance%s for face %ld\n", 2740 face->style_flags >> 16, 2741 ( face->style_flags >> 16 ) == 1 ? "" : "s", 2742 -face_index - 1 )); 2743 } 2744 #endif 2745 2746 FT_TRACE4(( "FT_Open_Face: Return 0x%x\n", error )); 2747 2748 return error; 2749 } 2750 2751 2752 /* documentation is in freetype.h */ 2753 2754 FT_EXPORT_DEF( FT_Error ) FT_Attach_File(FT_Face face,const char * filepathname)2755 FT_Attach_File( FT_Face face, 2756 const char* filepathname ) 2757 { 2758 FT_Open_Args open; 2759 2760 2761 /* test for valid `face' delayed to `FT_Attach_Stream' */ 2762 2763 if ( !filepathname ) 2764 return FT_THROW( Invalid_Argument ); 2765 2766 open.stream = NULL; 2767 open.flags = FT_OPEN_PATHNAME; 2768 open.pathname = (char*)filepathname; 2769 2770 return FT_Attach_Stream( face, &open ); 2771 } 2772 2773 2774 /* documentation is in freetype.h */ 2775 2776 FT_EXPORT_DEF( FT_Error ) FT_Attach_Stream(FT_Face face,FT_Open_Args * parameters)2777 FT_Attach_Stream( FT_Face face, 2778 FT_Open_Args* parameters ) 2779 { 2780 FT_Stream stream; 2781 FT_Error error; 2782 FT_Driver driver; 2783 2784 FT_Driver_Class clazz; 2785 2786 2787 /* test for valid `parameters' delayed to `FT_Stream_New' */ 2788 2789 if ( !face ) 2790 return FT_THROW( Invalid_Face_Handle ); 2791 2792 driver = face->driver; 2793 if ( !driver ) 2794 return FT_THROW( Invalid_Driver_Handle ); 2795 2796 error = FT_Stream_New( driver->root.library, parameters, &stream ); 2797 if ( error ) 2798 goto Exit; 2799 2800 /* we implement FT_Attach_Stream in each driver through the */ 2801 /* `attach_file' interface */ 2802 2803 error = FT_ERR( Unimplemented_Feature ); 2804 clazz = driver->clazz; 2805 if ( clazz->attach_file ) 2806 error = clazz->attach_file( face, stream ); 2807 2808 /* close the attached stream */ 2809 FT_Stream_Free( stream, 2810 FT_BOOL( parameters->stream && 2811 ( parameters->flags & FT_OPEN_STREAM ) ) ); 2812 2813 Exit: 2814 return error; 2815 } 2816 2817 2818 /* documentation is in freetype.h */ 2819 2820 FT_EXPORT_DEF( FT_Error ) FT_Reference_Face(FT_Face face)2821 FT_Reference_Face( FT_Face face ) 2822 { 2823 if ( !face ) 2824 return FT_THROW( Invalid_Face_Handle ); 2825 2826 face->internal->refcount++; 2827 2828 return FT_Err_Ok; 2829 } 2830 2831 2832 /* documentation is in freetype.h */ 2833 2834 FT_EXPORT_DEF( FT_Error ) FT_Done_Face(FT_Face face)2835 FT_Done_Face( FT_Face face ) 2836 { 2837 FT_Error error; 2838 FT_Driver driver; 2839 FT_Memory memory; 2840 FT_ListNode node; 2841 2842 2843 error = FT_ERR( Invalid_Face_Handle ); 2844 if ( face && face->driver ) 2845 { 2846 face->internal->refcount--; 2847 if ( face->internal->refcount > 0 ) 2848 error = FT_Err_Ok; 2849 else 2850 { 2851 driver = face->driver; 2852 memory = driver->root.memory; 2853 2854 /* find face in driver's list */ 2855 node = FT_List_Find( &driver->faces_list, face ); 2856 if ( node ) 2857 { 2858 /* remove face object from the driver's list */ 2859 FT_List_Remove( &driver->faces_list, node ); 2860 FT_FREE( node ); 2861 2862 /* now destroy the object proper */ 2863 destroy_face( memory, face, driver ); 2864 error = FT_Err_Ok; 2865 } 2866 } 2867 } 2868 2869 return error; 2870 } 2871 2872 2873 /* documentation is in ftobjs.h */ 2874 2875 FT_EXPORT_DEF( FT_Error ) FT_New_Size(FT_Face face,FT_Size * asize)2876 FT_New_Size( FT_Face face, 2877 FT_Size *asize ) 2878 { 2879 FT_Error error; 2880 FT_Memory memory; 2881 FT_Driver driver; 2882 FT_Driver_Class clazz; 2883 2884 FT_Size size = NULL; 2885 FT_ListNode node = NULL; 2886 2887 FT_Size_Internal internal = NULL; 2888 2889 2890 if ( !face ) 2891 return FT_THROW( Invalid_Face_Handle ); 2892 2893 if ( !asize ) 2894 return FT_THROW( Invalid_Argument ); 2895 2896 if ( !face->driver ) 2897 return FT_THROW( Invalid_Driver_Handle ); 2898 2899 *asize = NULL; 2900 2901 driver = face->driver; 2902 clazz = driver->clazz; 2903 memory = face->memory; 2904 2905 /* Allocate new size object and perform basic initialisation */ 2906 if ( FT_ALLOC( size, clazz->size_object_size ) || FT_QNEW( node ) ) 2907 goto Exit; 2908 2909 size->face = face; 2910 2911 if ( FT_NEW( internal ) ) 2912 goto Exit; 2913 2914 size->internal = internal; 2915 2916 if ( clazz->init_size ) 2917 error = clazz->init_size( size ); 2918 2919 /* in case of success, add to the face's list */ 2920 if ( !error ) 2921 { 2922 *asize = size; 2923 node->data = size; 2924 FT_List_Add( &face->sizes_list, node ); 2925 } 2926 2927 Exit: 2928 if ( error ) 2929 { 2930 FT_FREE( node ); 2931 if ( size ) 2932 FT_FREE( size->internal ); 2933 FT_FREE( size ); 2934 } 2935 2936 return error; 2937 } 2938 2939 2940 /* documentation is in ftobjs.h */ 2941 2942 FT_EXPORT_DEF( FT_Error ) FT_Done_Size(FT_Size size)2943 FT_Done_Size( FT_Size size ) 2944 { 2945 FT_Error error; 2946 FT_Driver driver; 2947 FT_Memory memory; 2948 FT_Face face; 2949 FT_ListNode node; 2950 2951 2952 if ( !size ) 2953 return FT_THROW( Invalid_Size_Handle ); 2954 2955 face = size->face; 2956 if ( !face ) 2957 return FT_THROW( Invalid_Face_Handle ); 2958 2959 driver = face->driver; 2960 if ( !driver ) 2961 return FT_THROW( Invalid_Driver_Handle ); 2962 2963 memory = driver->root.memory; 2964 2965 error = FT_Err_Ok; 2966 node = FT_List_Find( &face->sizes_list, size ); 2967 if ( node ) 2968 { 2969 FT_List_Remove( &face->sizes_list, node ); 2970 FT_FREE( node ); 2971 2972 if ( face->size == size ) 2973 { 2974 face->size = NULL; 2975 if ( face->sizes_list.head ) 2976 face->size = (FT_Size)(face->sizes_list.head->data); 2977 } 2978 2979 destroy_size( memory, size, driver ); 2980 } 2981 else 2982 error = FT_THROW( Invalid_Size_Handle ); 2983 2984 return error; 2985 } 2986 2987 2988 /* documentation is in ftobjs.h */ 2989 2990 FT_BASE_DEF( FT_Error ) FT_Match_Size(FT_Face face,FT_Size_Request req,FT_Bool ignore_width,FT_ULong * size_index)2991 FT_Match_Size( FT_Face face, 2992 FT_Size_Request req, 2993 FT_Bool ignore_width, 2994 FT_ULong* size_index ) 2995 { 2996 FT_Int i; 2997 FT_Long w, h; 2998 2999 3000 if ( !FT_HAS_FIXED_SIZES( face ) ) 3001 return FT_THROW( Invalid_Face_Handle ); 3002 3003 /* FT_Bitmap_Size doesn't provide enough info... */ 3004 if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL ) 3005 return FT_THROW( Unimplemented_Feature ); 3006 3007 w = FT_REQUEST_WIDTH ( req ); 3008 h = FT_REQUEST_HEIGHT( req ); 3009 3010 if ( req->width && !req->height ) 3011 h = w; 3012 else if ( !req->width && req->height ) 3013 w = h; 3014 3015 w = FT_PIX_ROUND( w ); 3016 h = FT_PIX_ROUND( h ); 3017 3018 if ( !w || !h ) 3019 return FT_THROW( Invalid_Pixel_Size ); 3020 3021 for ( i = 0; i < face->num_fixed_sizes; i++ ) 3022 { 3023 FT_Bitmap_Size* bsize = face->available_sizes + i; 3024 3025 3026 if ( h != FT_PIX_ROUND( bsize->y_ppem ) ) 3027 continue; 3028 3029 if ( w == FT_PIX_ROUND( bsize->x_ppem ) || ignore_width ) 3030 { 3031 FT_TRACE3(( "FT_Match_Size: bitmap strike %d matches\n", i )); 3032 3033 if ( size_index ) 3034 *size_index = (FT_ULong)i; 3035 3036 return FT_Err_Ok; 3037 } 3038 } 3039 3040 FT_TRACE3(( "FT_Match_Size: no matching bitmap strike\n" )); 3041 3042 return FT_THROW( Invalid_Pixel_Size ); 3043 } 3044 3045 3046 /* documentation is in ftobjs.h */ 3047 3048 FT_BASE_DEF( void ) ft_synthesize_vertical_metrics(FT_Glyph_Metrics * metrics,FT_Pos advance)3049 ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics, 3050 FT_Pos advance ) 3051 { 3052 FT_Pos height = metrics->height; 3053 3054 3055 /* compensate for glyph with bbox above/below the baseline */ 3056 if ( metrics->horiBearingY < 0 ) 3057 { 3058 if ( height < metrics->horiBearingY ) 3059 height = metrics->horiBearingY; 3060 } 3061 else if ( metrics->horiBearingY > 0 ) 3062 height -= metrics->horiBearingY; 3063 3064 /* the factor 1.2 is a heuristical value */ 3065 if ( !advance ) 3066 advance = height * 12 / 10; 3067 3068 metrics->vertBearingX = metrics->horiBearingX - metrics->horiAdvance / 2; 3069 metrics->vertBearingY = ( advance - height ) / 2; 3070 metrics->vertAdvance = advance; 3071 } 3072 3073 3074 static void ft_recompute_scaled_metrics(FT_Face face,FT_Size_Metrics * metrics)3075 ft_recompute_scaled_metrics( FT_Face face, 3076 FT_Size_Metrics* metrics ) 3077 { 3078 /* Compute root ascender, descender, test height, and max_advance */ 3079 3080 #ifdef GRID_FIT_METRICS 3081 metrics->ascender = FT_PIX_CEIL( FT_MulFix( face->ascender, 3082 metrics->y_scale ) ); 3083 3084 metrics->descender = FT_PIX_FLOOR( FT_MulFix( face->descender, 3085 metrics->y_scale ) ); 3086 3087 metrics->height = FT_PIX_ROUND( FT_MulFix( face->height, 3088 metrics->y_scale ) ); 3089 3090 metrics->max_advance = FT_PIX_ROUND( FT_MulFix( face->max_advance_width, 3091 metrics->x_scale ) ); 3092 #else /* !GRID_FIT_METRICS */ 3093 metrics->ascender = FT_MulFix( face->ascender, 3094 metrics->y_scale ); 3095 3096 metrics->descender = FT_MulFix( face->descender, 3097 metrics->y_scale ); 3098 3099 metrics->height = FT_MulFix( face->height, 3100 metrics->y_scale ); 3101 3102 metrics->max_advance = FT_MulFix( face->max_advance_width, 3103 metrics->x_scale ); 3104 #endif /* !GRID_FIT_METRICS */ 3105 } 3106 3107 3108 FT_BASE_DEF( void ) FT_Select_Metrics(FT_Face face,FT_ULong strike_index)3109 FT_Select_Metrics( FT_Face face, 3110 FT_ULong strike_index ) 3111 { 3112 FT_Size_Metrics* metrics; 3113 FT_Bitmap_Size* bsize; 3114 3115 3116 metrics = &face->size->metrics; 3117 bsize = face->available_sizes + strike_index; 3118 3119 metrics->x_ppem = (FT_UShort)( ( bsize->x_ppem + 32 ) >> 6 ); 3120 metrics->y_ppem = (FT_UShort)( ( bsize->y_ppem + 32 ) >> 6 ); 3121 3122 if ( FT_IS_SCALABLE( face ) ) 3123 { 3124 metrics->x_scale = FT_DivFix( bsize->x_ppem, 3125 face->units_per_EM ); 3126 metrics->y_scale = FT_DivFix( bsize->y_ppem, 3127 face->units_per_EM ); 3128 3129 ft_recompute_scaled_metrics( face, metrics ); 3130 } 3131 else 3132 { 3133 metrics->x_scale = 1L << 16; 3134 metrics->y_scale = 1L << 16; 3135 metrics->ascender = bsize->y_ppem; 3136 metrics->descender = 0; 3137 metrics->height = bsize->height << 6; 3138 metrics->max_advance = bsize->x_ppem; 3139 } 3140 } 3141 3142 3143 FT_BASE_DEF( FT_Error ) FT_Request_Metrics(FT_Face face,FT_Size_Request req)3144 FT_Request_Metrics( FT_Face face, 3145 FT_Size_Request req ) 3146 { 3147 FT_Error error = FT_Err_Ok; 3148 3149 FT_Size_Metrics* metrics; 3150 3151 3152 metrics = &face->size->metrics; 3153 3154 if ( FT_IS_SCALABLE( face ) ) 3155 { 3156 FT_Long w = 0, h = 0, scaled_w = 0, scaled_h = 0; 3157 3158 3159 switch ( req->type ) 3160 { 3161 case FT_SIZE_REQUEST_TYPE_NOMINAL: 3162 w = h = face->units_per_EM; 3163 break; 3164 3165 case FT_SIZE_REQUEST_TYPE_REAL_DIM: 3166 w = h = face->ascender - face->descender; 3167 break; 3168 3169 case FT_SIZE_REQUEST_TYPE_BBOX: 3170 w = face->bbox.xMax - face->bbox.xMin; 3171 h = face->bbox.yMax - face->bbox.yMin; 3172 break; 3173 3174 case FT_SIZE_REQUEST_TYPE_CELL: 3175 w = face->max_advance_width; 3176 h = face->ascender - face->descender; 3177 break; 3178 3179 case FT_SIZE_REQUEST_TYPE_SCALES: 3180 metrics->x_scale = (FT_Fixed)req->width; 3181 metrics->y_scale = (FT_Fixed)req->height; 3182 if ( !metrics->x_scale ) 3183 metrics->x_scale = metrics->y_scale; 3184 else if ( !metrics->y_scale ) 3185 metrics->y_scale = metrics->x_scale; 3186 goto Calculate_Ppem; 3187 3188 case FT_SIZE_REQUEST_TYPE_MAX: 3189 break; 3190 } 3191 3192 /* to be on the safe side */ 3193 if ( w < 0 ) 3194 w = -w; 3195 3196 if ( h < 0 ) 3197 h = -h; 3198 3199 scaled_w = FT_REQUEST_WIDTH ( req ); 3200 scaled_h = FT_REQUEST_HEIGHT( req ); 3201 3202 /* determine scales */ 3203 if ( req->width ) 3204 { 3205 metrics->x_scale = FT_DivFix( scaled_w, w ); 3206 3207 if ( req->height ) 3208 { 3209 metrics->y_scale = FT_DivFix( scaled_h, h ); 3210 3211 if ( req->type == FT_SIZE_REQUEST_TYPE_CELL ) 3212 { 3213 if ( metrics->y_scale > metrics->x_scale ) 3214 metrics->y_scale = metrics->x_scale; 3215 else 3216 metrics->x_scale = metrics->y_scale; 3217 } 3218 } 3219 else 3220 { 3221 metrics->y_scale = metrics->x_scale; 3222 scaled_h = FT_MulDiv( scaled_w, h, w ); 3223 } 3224 } 3225 else 3226 { 3227 metrics->x_scale = metrics->y_scale = FT_DivFix( scaled_h, h ); 3228 scaled_w = FT_MulDiv( scaled_h, w, h ); 3229 } 3230 3231 Calculate_Ppem: 3232 /* calculate the ppems */ 3233 if ( req->type != FT_SIZE_REQUEST_TYPE_NOMINAL ) 3234 { 3235 scaled_w = FT_MulFix( face->units_per_EM, metrics->x_scale ); 3236 scaled_h = FT_MulFix( face->units_per_EM, metrics->y_scale ); 3237 } 3238 3239 scaled_w = ( scaled_w + 32 ) >> 6; 3240 scaled_h = ( scaled_h + 32 ) >> 6; 3241 if ( scaled_w > FT_USHORT_MAX || 3242 scaled_h > FT_USHORT_MAX ) 3243 { 3244 FT_ERROR(( "FT_Request_Metrics: Resulting ppem size too large\n" )); 3245 error = FT_ERR( Invalid_Pixel_Size ); 3246 goto Exit; 3247 } 3248 3249 metrics->x_ppem = (FT_UShort)scaled_w; 3250 metrics->y_ppem = (FT_UShort)scaled_h; 3251 3252 ft_recompute_scaled_metrics( face, metrics ); 3253 } 3254 else 3255 { 3256 FT_ZERO( metrics ); 3257 metrics->x_scale = 1L << 16; 3258 metrics->y_scale = 1L << 16; 3259 } 3260 3261 Exit: 3262 return error; 3263 } 3264 3265 3266 /* documentation is in freetype.h */ 3267 3268 FT_EXPORT_DEF( FT_Error ) FT_Select_Size(FT_Face face,FT_Int strike_index)3269 FT_Select_Size( FT_Face face, 3270 FT_Int strike_index ) 3271 { 3272 FT_Error error = FT_Err_Ok; 3273 FT_Driver_Class clazz; 3274 3275 3276 if ( !face || !FT_HAS_FIXED_SIZES( face ) ) 3277 return FT_THROW( Invalid_Face_Handle ); 3278 3279 if ( strike_index < 0 || strike_index >= face->num_fixed_sizes ) 3280 return FT_THROW( Invalid_Argument ); 3281 3282 clazz = face->driver->clazz; 3283 3284 if ( clazz->select_size ) 3285 { 3286 error = clazz->select_size( face->size, (FT_ULong)strike_index ); 3287 3288 FT_TRACE5(( "FT_Select_Size (%s driver):\n", 3289 face->driver->root.clazz->module_name )); 3290 } 3291 else 3292 { 3293 FT_Select_Metrics( face, (FT_ULong)strike_index ); 3294 3295 FT_TRACE5(( "FT_Select_Size:\n" )); 3296 } 3297 3298 #ifdef FT_DEBUG_LEVEL_TRACE 3299 { 3300 FT_Size_Metrics* metrics = &face->size->metrics; 3301 3302 3303 FT_TRACE5(( " x scale: %ld (%f)\n", 3304 metrics->x_scale, metrics->x_scale / 65536.0 )); 3305 FT_TRACE5(( " y scale: %ld (%f)\n", 3306 metrics->y_scale, metrics->y_scale / 65536.0 )); 3307 FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); 3308 FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); 3309 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 3310 FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); 3311 FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); 3312 FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); 3313 } 3314 #endif 3315 3316 return error; 3317 } 3318 3319 3320 /* documentation is in freetype.h */ 3321 3322 FT_EXPORT_DEF( FT_Error ) FT_Request_Size(FT_Face face,FT_Size_Request req)3323 FT_Request_Size( FT_Face face, 3324 FT_Size_Request req ) 3325 { 3326 FT_Error error; 3327 FT_Driver_Class clazz; 3328 FT_ULong strike_index; 3329 3330 3331 if ( !face ) 3332 return FT_THROW( Invalid_Face_Handle ); 3333 3334 if ( !req || req->width < 0 || req->height < 0 || 3335 req->type >= FT_SIZE_REQUEST_TYPE_MAX ) 3336 return FT_THROW( Invalid_Argument ); 3337 3338 /* signal the auto-hinter to recompute its size metrics */ 3339 /* (if requested) */ 3340 face->size->internal->autohint_metrics.x_scale = 0; 3341 3342 clazz = face->driver->clazz; 3343 3344 if ( clazz->request_size ) 3345 { 3346 error = clazz->request_size( face->size, req ); 3347 3348 FT_TRACE5(( "FT_Request_Size (%s driver):\n", 3349 face->driver->root.clazz->module_name )); 3350 } 3351 else if ( !FT_IS_SCALABLE( face ) && FT_HAS_FIXED_SIZES( face ) ) 3352 { 3353 /* 3354 * The reason that a driver doesn't have `request_size' defined is 3355 * either that the scaling here suffices or that the supported formats 3356 * are bitmap-only and size matching is not implemented. 3357 * 3358 * In the latter case, a simple size matching is done. 3359 */ 3360 error = FT_Match_Size( face, req, 0, &strike_index ); 3361 if ( error ) 3362 goto Exit; 3363 3364 return FT_Select_Size( face, (FT_Int)strike_index ); 3365 } 3366 else 3367 { 3368 error = FT_Request_Metrics( face, req ); 3369 if ( error ) 3370 goto Exit; 3371 3372 FT_TRACE5(( "FT_Request_Size:\n" )); 3373 } 3374 3375 #ifdef FT_DEBUG_LEVEL_TRACE 3376 { 3377 FT_Size_Metrics* metrics = &face->size->metrics; 3378 3379 3380 FT_TRACE5(( " x scale: %ld (%f)\n", 3381 metrics->x_scale, metrics->x_scale / 65536.0 )); 3382 FT_TRACE5(( " y scale: %ld (%f)\n", 3383 metrics->y_scale, metrics->y_scale / 65536.0 )); 3384 FT_TRACE5(( " ascender: %f\n", metrics->ascender / 64.0 )); 3385 FT_TRACE5(( " descender: %f\n", metrics->descender / 64.0 )); 3386 FT_TRACE5(( " height: %f\n", metrics->height / 64.0 )); 3387 FT_TRACE5(( " max advance: %f\n", metrics->max_advance / 64.0 )); 3388 FT_TRACE5(( " x ppem: %d\n", metrics->x_ppem )); 3389 FT_TRACE5(( " y ppem: %d\n", metrics->y_ppem )); 3390 } 3391 #endif 3392 3393 Exit: 3394 return error; 3395 } 3396 3397 3398 /* documentation is in freetype.h */ 3399 3400 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)3401 FT_Set_Char_Size( FT_Face face, 3402 FT_F26Dot6 char_width, 3403 FT_F26Dot6 char_height, 3404 FT_UInt horz_resolution, 3405 FT_UInt vert_resolution ) 3406 { 3407 FT_Size_RequestRec req; 3408 3409 3410 /* check of `face' delayed to `FT_Request_Size' */ 3411 3412 if ( !char_width ) 3413 char_width = char_height; 3414 else if ( !char_height ) 3415 char_height = char_width; 3416 3417 if ( !horz_resolution ) 3418 horz_resolution = vert_resolution; 3419 else if ( !vert_resolution ) 3420 vert_resolution = horz_resolution; 3421 3422 if ( char_width < 1 * 64 ) 3423 char_width = 1 * 64; 3424 if ( char_height < 1 * 64 ) 3425 char_height = 1 * 64; 3426 3427 if ( !horz_resolution ) 3428 horz_resolution = vert_resolution = 72; 3429 3430 req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; 3431 req.width = char_width; 3432 req.height = char_height; 3433 req.horiResolution = horz_resolution; 3434 req.vertResolution = vert_resolution; 3435 3436 return FT_Request_Size( face, &req ); 3437 } 3438 3439 3440 /* documentation is in freetype.h */ 3441 3442 FT_EXPORT_DEF( FT_Error ) FT_Set_Pixel_Sizes(FT_Face face,FT_UInt pixel_width,FT_UInt pixel_height)3443 FT_Set_Pixel_Sizes( FT_Face face, 3444 FT_UInt pixel_width, 3445 FT_UInt pixel_height ) 3446 { 3447 FT_Size_RequestRec req; 3448 3449 3450 /* check of `face' delayed to `FT_Request_Size' */ 3451 3452 if ( pixel_width == 0 ) 3453 pixel_width = pixel_height; 3454 else if ( pixel_height == 0 ) 3455 pixel_height = pixel_width; 3456 3457 if ( pixel_width < 1 ) 3458 pixel_width = 1; 3459 if ( pixel_height < 1 ) 3460 pixel_height = 1; 3461 3462 /* use `>=' to avoid potential compiler warning on 16bit platforms */ 3463 if ( pixel_width >= 0xFFFFU ) 3464 pixel_width = 0xFFFFU; 3465 if ( pixel_height >= 0xFFFFU ) 3466 pixel_height = 0xFFFFU; 3467 3468 req.type = FT_SIZE_REQUEST_TYPE_NOMINAL; 3469 req.width = (FT_Long)( pixel_width << 6 ); 3470 req.height = (FT_Long)( pixel_height << 6 ); 3471 req.horiResolution = 0; 3472 req.vertResolution = 0; 3473 3474 return FT_Request_Size( face, &req ); 3475 } 3476 3477 3478 /* documentation is in freetype.h */ 3479 3480 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)3481 FT_Get_Kerning( FT_Face face, 3482 FT_UInt left_glyph, 3483 FT_UInt right_glyph, 3484 FT_UInt kern_mode, 3485 FT_Vector *akerning ) 3486 { 3487 FT_Error error = FT_Err_Ok; 3488 FT_Driver driver; 3489 3490 3491 if ( !face ) 3492 return FT_THROW( Invalid_Face_Handle ); 3493 3494 if ( !akerning ) 3495 return FT_THROW( Invalid_Argument ); 3496 3497 driver = face->driver; 3498 3499 akerning->x = 0; 3500 akerning->y = 0; 3501 3502 if ( driver->clazz->get_kerning ) 3503 { 3504 error = driver->clazz->get_kerning( face, 3505 left_glyph, 3506 right_glyph, 3507 akerning ); 3508 if ( !error ) 3509 { 3510 if ( kern_mode != FT_KERNING_UNSCALED ) 3511 { 3512 akerning->x = FT_MulFix( akerning->x, face->size->metrics.x_scale ); 3513 akerning->y = FT_MulFix( akerning->y, face->size->metrics.y_scale ); 3514 3515 if ( kern_mode != FT_KERNING_UNFITTED ) 3516 { 3517 FT_Pos orig_x = akerning->x; 3518 FT_Pos orig_y = akerning->y; 3519 3520 3521 /* we scale down kerning values for small ppem values */ 3522 /* to avoid that rounding makes them too big. */ 3523 /* `25' has been determined heuristically. */ 3524 if ( face->size->metrics.x_ppem < 25 ) 3525 akerning->x = FT_MulDiv( orig_x, 3526 face->size->metrics.x_ppem, 25 ); 3527 if ( face->size->metrics.y_ppem < 25 ) 3528 akerning->y = FT_MulDiv( orig_y, 3529 face->size->metrics.y_ppem, 25 ); 3530 3531 akerning->x = FT_PIX_ROUND( akerning->x ); 3532 akerning->y = FT_PIX_ROUND( akerning->y ); 3533 3534 #ifdef FT_DEBUG_LEVEL_TRACE 3535 { 3536 FT_Pos orig_x_rounded = FT_PIX_ROUND( orig_x ); 3537 FT_Pos orig_y_rounded = FT_PIX_ROUND( orig_y ); 3538 3539 3540 if ( akerning->x != orig_x_rounded || 3541 akerning->y != orig_y_rounded ) 3542 FT_TRACE5(( "FT_Get_Kerning: horizontal kerning" 3543 " (%ld, %ld) scaled down to (%ld, %ld) pixels\n", 3544 orig_x_rounded / 64, orig_y_rounded / 64, 3545 akerning->x / 64, akerning->y / 64 )); 3546 } 3547 #endif 3548 } 3549 } 3550 } 3551 } 3552 3553 return error; 3554 } 3555 3556 3557 /* documentation is in freetype.h */ 3558 3559 FT_EXPORT_DEF( FT_Error ) FT_Get_Track_Kerning(FT_Face face,FT_Fixed point_size,FT_Int degree,FT_Fixed * akerning)3560 FT_Get_Track_Kerning( FT_Face face, 3561 FT_Fixed point_size, 3562 FT_Int degree, 3563 FT_Fixed* akerning ) 3564 { 3565 FT_Service_Kerning service; 3566 FT_Error error = FT_Err_Ok; 3567 3568 3569 if ( !face ) 3570 return FT_THROW( Invalid_Face_Handle ); 3571 3572 if ( !akerning ) 3573 return FT_THROW( Invalid_Argument ); 3574 3575 FT_FACE_FIND_SERVICE( face, service, KERNING ); 3576 if ( !service ) 3577 return FT_THROW( Unimplemented_Feature ); 3578 3579 error = service->get_track( face, 3580 point_size, 3581 degree, 3582 akerning ); 3583 3584 return error; 3585 } 3586 3587 3588 /* documentation is in freetype.h */ 3589 3590 FT_EXPORT_DEF( FT_Error ) FT_Select_Charmap(FT_Face face,FT_Encoding encoding)3591 FT_Select_Charmap( FT_Face face, 3592 FT_Encoding encoding ) 3593 { 3594 FT_CharMap* cur; 3595 FT_CharMap* limit; 3596 3597 3598 if ( !face ) 3599 return FT_THROW( Invalid_Face_Handle ); 3600 3601 /* FT_ENCODING_NONE is a valid encoding for BDF, PCF, and Windows FNT */ 3602 if ( encoding == FT_ENCODING_NONE && !face->num_charmaps ) 3603 return FT_THROW( Invalid_Argument ); 3604 3605 /* FT_ENCODING_UNICODE is special. We try to find the `best' Unicode */ 3606 /* charmap available, i.e., one with UCS-4 characters, if possible. */ 3607 /* */ 3608 /* This is done by find_unicode_charmap() above, to share code. */ 3609 if ( encoding == FT_ENCODING_UNICODE ) 3610 return find_unicode_charmap( face ); 3611 3612 cur = face->charmaps; 3613 if ( !cur ) 3614 return FT_THROW( Invalid_CharMap_Handle ); 3615 3616 limit = cur + face->num_charmaps; 3617 3618 for ( ; cur < limit; cur++ ) 3619 { 3620 if ( cur[0]->encoding == encoding ) 3621 { 3622 face->charmap = cur[0]; 3623 return FT_Err_Ok; 3624 } 3625 } 3626 3627 return FT_THROW( Invalid_Argument ); 3628 } 3629 3630 3631 /* documentation is in freetype.h */ 3632 3633 FT_EXPORT_DEF( FT_Error ) FT_Set_Charmap(FT_Face face,FT_CharMap charmap)3634 FT_Set_Charmap( FT_Face face, 3635 FT_CharMap charmap ) 3636 { 3637 FT_CharMap* cur; 3638 FT_CharMap* limit; 3639 3640 3641 if ( !face ) 3642 return FT_THROW( Invalid_Face_Handle ); 3643 3644 cur = face->charmaps; 3645 if ( !cur || !charmap ) 3646 return FT_THROW( Invalid_CharMap_Handle ); 3647 3648 limit = cur + face->num_charmaps; 3649 3650 for ( ; cur < limit; cur++ ) 3651 { 3652 if ( cur[0] == charmap && 3653 FT_Get_CMap_Format ( charmap ) != 14 ) 3654 { 3655 face->charmap = cur[0]; 3656 return FT_Err_Ok; 3657 } 3658 } 3659 3660 return FT_THROW( Invalid_Argument ); 3661 } 3662 3663 3664 /* documentation is in freetype.h */ 3665 3666 FT_EXPORT_DEF( FT_Int ) FT_Get_Charmap_Index(FT_CharMap charmap)3667 FT_Get_Charmap_Index( FT_CharMap charmap ) 3668 { 3669 FT_Int i; 3670 3671 3672 if ( !charmap || !charmap->face ) 3673 return -1; 3674 3675 for ( i = 0; i < charmap->face->num_charmaps; i++ ) 3676 if ( charmap->face->charmaps[i] == charmap ) 3677 break; 3678 3679 FT_ASSERT( i < charmap->face->num_charmaps ); 3680 3681 return i; 3682 } 3683 3684 3685 static void ft_cmap_done_internal(FT_CMap cmap)3686 ft_cmap_done_internal( FT_CMap cmap ) 3687 { 3688 FT_CMap_Class clazz = cmap->clazz; 3689 FT_Face face = cmap->charmap.face; 3690 FT_Memory memory = FT_FACE_MEMORY( face ); 3691 3692 3693 if ( clazz->done ) 3694 clazz->done( cmap ); 3695 3696 FT_FREE( cmap ); 3697 } 3698 3699 3700 FT_BASE_DEF( void ) FT_CMap_Done(FT_CMap cmap)3701 FT_CMap_Done( FT_CMap cmap ) 3702 { 3703 if ( cmap ) 3704 { 3705 FT_Face face = cmap->charmap.face; 3706 FT_Memory memory = FT_FACE_MEMORY( face ); 3707 FT_Error error; 3708 FT_Int i, j; 3709 3710 3711 for ( i = 0; i < face->num_charmaps; i++ ) 3712 { 3713 if ( (FT_CMap)face->charmaps[i] == cmap ) 3714 { 3715 FT_CharMap last_charmap = face->charmaps[face->num_charmaps - 1]; 3716 3717 3718 if ( FT_QRENEW_ARRAY( face->charmaps, 3719 face->num_charmaps, 3720 face->num_charmaps - 1 ) ) 3721 return; 3722 3723 /* remove it from our list of charmaps */ 3724 for ( j = i + 1; j < face->num_charmaps; j++ ) 3725 { 3726 if ( j == face->num_charmaps - 1 ) 3727 face->charmaps[j - 1] = last_charmap; 3728 else 3729 face->charmaps[j - 1] = face->charmaps[j]; 3730 } 3731 3732 face->num_charmaps--; 3733 3734 if ( (FT_CMap)face->charmap == cmap ) 3735 face->charmap = NULL; 3736 3737 ft_cmap_done_internal( cmap ); 3738 3739 break; 3740 } 3741 } 3742 } 3743 } 3744 3745 3746 FT_BASE_DEF( FT_Error ) FT_CMap_New(FT_CMap_Class clazz,FT_Pointer init_data,FT_CharMap charmap,FT_CMap * acmap)3747 FT_CMap_New( FT_CMap_Class clazz, 3748 FT_Pointer init_data, 3749 FT_CharMap charmap, 3750 FT_CMap *acmap ) 3751 { 3752 FT_Error error; 3753 FT_Face face; 3754 FT_Memory memory; 3755 FT_CMap cmap = NULL; 3756 3757 3758 if ( !clazz || !charmap || !charmap->face ) 3759 return FT_THROW( Invalid_Argument ); 3760 3761 face = charmap->face; 3762 memory = FT_FACE_MEMORY( face ); 3763 3764 if ( !FT_ALLOC( cmap, clazz->size ) ) 3765 { 3766 cmap->charmap = *charmap; 3767 cmap->clazz = clazz; 3768 3769 if ( clazz->init ) 3770 { 3771 error = clazz->init( cmap, init_data ); 3772 if ( error ) 3773 goto Fail; 3774 } 3775 3776 /* add it to our list of charmaps */ 3777 if ( FT_QRENEW_ARRAY( face->charmaps, 3778 face->num_charmaps, 3779 face->num_charmaps + 1 ) ) 3780 goto Fail; 3781 3782 face->charmaps[face->num_charmaps++] = (FT_CharMap)cmap; 3783 } 3784 3785 Exit: 3786 if ( acmap ) 3787 *acmap = cmap; 3788 3789 return error; 3790 3791 Fail: 3792 ft_cmap_done_internal( cmap ); 3793 cmap = NULL; 3794 goto Exit; 3795 } 3796 3797 3798 /* documentation is in freetype.h */ 3799 3800 FT_EXPORT_DEF( FT_UInt ) FT_Get_Char_Index(FT_Face face,FT_ULong charcode)3801 FT_Get_Char_Index( FT_Face face, 3802 FT_ULong charcode ) 3803 { 3804 FT_UInt result = 0; 3805 3806 3807 if ( face && face->charmap ) 3808 { 3809 FT_CMap cmap = FT_CMAP( face->charmap ); 3810 3811 3812 if ( charcode > 0xFFFFFFFFUL ) 3813 { 3814 FT_TRACE1(( "FT_Get_Char_Index: too large charcode" )); 3815 FT_TRACE1(( " 0x%lx is truncated\n", charcode )); 3816 } 3817 3818 result = cmap->clazz->char_index( cmap, (FT_UInt32)charcode ); 3819 if ( result >= (FT_UInt)face->num_glyphs ) 3820 result = 0; 3821 } 3822 3823 return result; 3824 } 3825 3826 3827 /* documentation is in freetype.h */ 3828 3829 FT_EXPORT_DEF( FT_ULong ) FT_Get_First_Char(FT_Face face,FT_UInt * agindex)3830 FT_Get_First_Char( FT_Face face, 3831 FT_UInt *agindex ) 3832 { 3833 FT_ULong result = 0; 3834 FT_UInt gindex = 0; 3835 3836 3837 /* only do something if we have a charmap, and we have glyphs at all */ 3838 if ( face && face->charmap && face->num_glyphs ) 3839 { 3840 gindex = FT_Get_Char_Index( face, 0 ); 3841 if ( gindex == 0 ) 3842 result = FT_Get_Next_Char( face, 0, &gindex ); 3843 } 3844 3845 if ( agindex ) 3846 *agindex = gindex; 3847 3848 return result; 3849 } 3850 3851 3852 /* documentation is in freetype.h */ 3853 3854 FT_EXPORT_DEF( FT_ULong ) FT_Get_Next_Char(FT_Face face,FT_ULong charcode,FT_UInt * agindex)3855 FT_Get_Next_Char( FT_Face face, 3856 FT_ULong charcode, 3857 FT_UInt *agindex ) 3858 { 3859 FT_ULong result = 0; 3860 FT_UInt gindex = 0; 3861 3862 3863 if ( face && face->charmap && face->num_glyphs ) 3864 { 3865 FT_UInt32 code = (FT_UInt32)charcode; 3866 FT_CMap cmap = FT_CMAP( face->charmap ); 3867 3868 3869 do 3870 { 3871 gindex = cmap->clazz->char_next( cmap, &code ); 3872 3873 } while ( gindex >= (FT_UInt)face->num_glyphs ); 3874 3875 result = ( gindex == 0 ) ? 0 : code; 3876 } 3877 3878 if ( agindex ) 3879 *agindex = gindex; 3880 3881 return result; 3882 } 3883 3884 3885 /* documentation is in freetype.h */ 3886 3887 FT_EXPORT_DEF( FT_Error ) FT_Face_Properties(FT_Face face,FT_UInt num_properties,FT_Parameter * properties)3888 FT_Face_Properties( FT_Face face, 3889 FT_UInt num_properties, 3890 FT_Parameter* properties ) 3891 { 3892 FT_Error error = FT_Err_Ok; 3893 3894 3895 if ( num_properties > 0 && !properties ) 3896 { 3897 error = FT_THROW( Invalid_Argument ); 3898 goto Exit; 3899 } 3900 3901 for ( ; num_properties > 0; num_properties-- ) 3902 { 3903 if ( properties->tag == FT_PARAM_TAG_STEM_DARKENING ) 3904 { 3905 if ( properties->data ) 3906 { 3907 if ( *( (FT_Bool*)properties->data ) == TRUE ) 3908 face->internal->no_stem_darkening = FALSE; 3909 else 3910 face->internal->no_stem_darkening = TRUE; 3911 } 3912 else 3913 { 3914 /* use module default */ 3915 face->internal->no_stem_darkening = -1; 3916 } 3917 } 3918 else if ( properties->tag == FT_PARAM_TAG_LCD_FILTER_WEIGHTS ) 3919 { 3920 #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING 3921 if ( properties->data ) 3922 { 3923 ft_memcpy( face->internal->lcd_weights, 3924 properties->data, 3925 FT_LCD_FILTER_FIVE_TAPS ); 3926 face->internal->lcd_filter_func = ft_lcd_filter_fir; 3927 } 3928 #else 3929 error = FT_THROW( Unimplemented_Feature ); 3930 goto Exit; 3931 #endif 3932 } 3933 else if ( properties->tag == FT_PARAM_TAG_RANDOM_SEED ) 3934 { 3935 if ( properties->data ) 3936 { 3937 face->internal->random_seed = *( (FT_Int32*)properties->data ); 3938 if ( face->internal->random_seed < 0 ) 3939 face->internal->random_seed = 0; 3940 } 3941 else 3942 { 3943 /* use module default */ 3944 face->internal->random_seed = -1; 3945 } 3946 } 3947 else 3948 { 3949 error = FT_THROW( Invalid_Argument ); 3950 goto Exit; 3951 } 3952 3953 if ( error ) 3954 break; 3955 3956 properties++; 3957 } 3958 3959 Exit: 3960 return error; 3961 } 3962 3963 3964 /* documentation is in freetype.h */ 3965 3966 FT_EXPORT_DEF( FT_UInt ) FT_Face_GetCharVariantIndex(FT_Face face,FT_ULong charcode,FT_ULong variantSelector)3967 FT_Face_GetCharVariantIndex( FT_Face face, 3968 FT_ULong charcode, 3969 FT_ULong variantSelector ) 3970 { 3971 FT_UInt result = 0; 3972 3973 3974 if ( face && 3975 face->charmap && 3976 face->charmap->encoding == FT_ENCODING_UNICODE ) 3977 { 3978 FT_CharMap charmap = find_variant_selector_charmap( face ); 3979 FT_CMap ucmap = FT_CMAP( face->charmap ); 3980 3981 3982 if ( charmap ) 3983 { 3984 FT_CMap vcmap = FT_CMAP( charmap ); 3985 3986 3987 if ( charcode > 0xFFFFFFFFUL ) 3988 { 3989 FT_TRACE1(( "FT_Face_GetCharVariantIndex:" 3990 " too large charcode" )); 3991 FT_TRACE1(( " 0x%lx is truncated\n", charcode )); 3992 } 3993 if ( variantSelector > 0xFFFFFFFFUL ) 3994 { 3995 FT_TRACE1(( "FT_Face_GetCharVariantIndex:" 3996 " too large variantSelector" )); 3997 FT_TRACE1(( " 0x%lx is truncated\n", variantSelector )); 3998 } 3999 4000 result = vcmap->clazz->char_var_index( vcmap, ucmap, 4001 (FT_UInt32)charcode, 4002 (FT_UInt32)variantSelector ); 4003 } 4004 } 4005 4006 return result; 4007 } 4008 4009 4010 /* documentation is in freetype.h */ 4011 4012 FT_EXPORT_DEF( FT_Int ) FT_Face_GetCharVariantIsDefault(FT_Face face,FT_ULong charcode,FT_ULong variantSelector)4013 FT_Face_GetCharVariantIsDefault( FT_Face face, 4014 FT_ULong charcode, 4015 FT_ULong variantSelector ) 4016 { 4017 FT_Int result = -1; 4018 4019 4020 if ( face ) 4021 { 4022 FT_CharMap charmap = find_variant_selector_charmap( face ); 4023 4024 4025 if ( charmap ) 4026 { 4027 FT_CMap vcmap = FT_CMAP( charmap ); 4028 4029 4030 if ( charcode > 0xFFFFFFFFUL ) 4031 { 4032 FT_TRACE1(( "FT_Face_GetCharVariantIsDefault:" 4033 " too large charcode" )); 4034 FT_TRACE1(( " 0x%lx is truncated\n", charcode )); 4035 } 4036 if ( variantSelector > 0xFFFFFFFFUL ) 4037 { 4038 FT_TRACE1(( "FT_Face_GetCharVariantIsDefault:" 4039 " too large variantSelector" )); 4040 FT_TRACE1(( " 0x%lx is truncated\n", variantSelector )); 4041 } 4042 4043 result = vcmap->clazz->char_var_default( vcmap, 4044 (FT_UInt32)charcode, 4045 (FT_UInt32)variantSelector ); 4046 } 4047 } 4048 4049 return result; 4050 } 4051 4052 4053 /* documentation is in freetype.h */ 4054 4055 FT_EXPORT_DEF( FT_UInt32* ) FT_Face_GetVariantSelectors(FT_Face face)4056 FT_Face_GetVariantSelectors( FT_Face face ) 4057 { 4058 FT_UInt32 *result = NULL; 4059 4060 4061 if ( face ) 4062 { 4063 FT_CharMap charmap = find_variant_selector_charmap( face ); 4064 4065 4066 if ( charmap ) 4067 { 4068 FT_CMap vcmap = FT_CMAP( charmap ); 4069 FT_Memory memory = FT_FACE_MEMORY( face ); 4070 4071 4072 result = vcmap->clazz->variant_list( vcmap, memory ); 4073 } 4074 } 4075 4076 return result; 4077 } 4078 4079 4080 /* documentation is in freetype.h */ 4081 4082 FT_EXPORT_DEF( FT_UInt32* ) FT_Face_GetVariantsOfChar(FT_Face face,FT_ULong charcode)4083 FT_Face_GetVariantsOfChar( FT_Face face, 4084 FT_ULong charcode ) 4085 { 4086 FT_UInt32 *result = NULL; 4087 4088 4089 if ( face ) 4090 { 4091 FT_CharMap charmap = find_variant_selector_charmap( face ); 4092 4093 4094 if ( charmap ) 4095 { 4096 FT_CMap vcmap = FT_CMAP( charmap ); 4097 FT_Memory memory = FT_FACE_MEMORY( face ); 4098 4099 4100 if ( charcode > 0xFFFFFFFFUL ) 4101 { 4102 FT_TRACE1(( "FT_Face_GetVariantsOfChar: too large charcode" )); 4103 FT_TRACE1(( " 0x%lx is truncated\n", charcode )); 4104 } 4105 4106 result = vcmap->clazz->charvariant_list( vcmap, memory, 4107 (FT_UInt32)charcode ); 4108 } 4109 } 4110 return result; 4111 } 4112 4113 4114 /* documentation is in freetype.h */ 4115 4116 FT_EXPORT_DEF( FT_UInt32* ) FT_Face_GetCharsOfVariant(FT_Face face,FT_ULong variantSelector)4117 FT_Face_GetCharsOfVariant( FT_Face face, 4118 FT_ULong variantSelector ) 4119 { 4120 FT_UInt32 *result = NULL; 4121 4122 4123 if ( face ) 4124 { 4125 FT_CharMap charmap = find_variant_selector_charmap( face ); 4126 4127 4128 if ( charmap ) 4129 { 4130 FT_CMap vcmap = FT_CMAP( charmap ); 4131 FT_Memory memory = FT_FACE_MEMORY( face ); 4132 4133 4134 if ( variantSelector > 0xFFFFFFFFUL ) 4135 { 4136 FT_TRACE1(( "FT_Get_Char_Index: too large variantSelector" )); 4137 FT_TRACE1(( " 0x%lx is truncated\n", variantSelector )); 4138 } 4139 4140 result = vcmap->clazz->variantchar_list( vcmap, memory, 4141 (FT_UInt32)variantSelector ); 4142 } 4143 } 4144 4145 return result; 4146 } 4147 4148 4149 /* documentation is in freetype.h */ 4150 4151 FT_EXPORT_DEF( FT_UInt ) FT_Get_Name_Index(FT_Face face,const FT_String * glyph_name)4152 FT_Get_Name_Index( FT_Face face, 4153 const FT_String* glyph_name ) 4154 { 4155 FT_UInt result = 0; 4156 4157 4158 if ( face && 4159 FT_HAS_GLYPH_NAMES( face ) && 4160 glyph_name ) 4161 { 4162 FT_Service_GlyphDict service; 4163 4164 4165 FT_FACE_LOOKUP_SERVICE( face, 4166 service, 4167 GLYPH_DICT ); 4168 4169 if ( service && service->name_index ) 4170 result = service->name_index( face, glyph_name ); 4171 } 4172 4173 return result; 4174 } 4175 4176 4177 /* documentation is in freetype.h */ 4178 4179 FT_EXPORT_DEF( FT_Error ) FT_Get_Glyph_Name(FT_Face face,FT_UInt glyph_index,FT_Pointer buffer,FT_UInt buffer_max)4180 FT_Get_Glyph_Name( FT_Face face, 4181 FT_UInt glyph_index, 4182 FT_Pointer buffer, 4183 FT_UInt buffer_max ) 4184 { 4185 FT_Error error; 4186 FT_Service_GlyphDict service; 4187 4188 4189 if ( !face ) 4190 return FT_THROW( Invalid_Face_Handle ); 4191 4192 if ( !buffer || buffer_max == 0 ) 4193 return FT_THROW( Invalid_Argument ); 4194 4195 /* clean up buffer */ 4196 ((FT_Byte*)buffer)[0] = '\0'; 4197 4198 if ( (FT_Long)glyph_index >= face->num_glyphs ) 4199 return FT_THROW( Invalid_Glyph_Index ); 4200 4201 if ( !FT_HAS_GLYPH_NAMES( face ) ) 4202 return FT_THROW( Invalid_Argument ); 4203 4204 FT_FACE_LOOKUP_SERVICE( face, service, GLYPH_DICT ); 4205 if ( service && service->get_name ) 4206 error = service->get_name( face, glyph_index, buffer, buffer_max ); 4207 else 4208 error = FT_THROW( Invalid_Argument ); 4209 4210 return error; 4211 } 4212 4213 4214 /* documentation is in freetype.h */ 4215 4216 FT_EXPORT_DEF( const char* ) FT_Get_Postscript_Name(FT_Face face)4217 FT_Get_Postscript_Name( FT_Face face ) 4218 { 4219 const char* result = NULL; 4220 4221 4222 if ( !face ) 4223 goto Exit; 4224 4225 if ( !result ) 4226 { 4227 FT_Service_PsFontName service; 4228 4229 4230 FT_FACE_LOOKUP_SERVICE( face, 4231 service, 4232 POSTSCRIPT_FONT_NAME ); 4233 4234 if ( service && service->get_ps_font_name ) 4235 result = service->get_ps_font_name( face ); 4236 } 4237 4238 Exit: 4239 return result; 4240 } 4241 4242 4243 /* documentation is in tttables.h */ 4244 4245 FT_EXPORT_DEF( void* ) FT_Get_Sfnt_Table(FT_Face face,FT_Sfnt_Tag tag)4246 FT_Get_Sfnt_Table( FT_Face face, 4247 FT_Sfnt_Tag tag ) 4248 { 4249 void* table = NULL; 4250 FT_Service_SFNT_Table service; 4251 4252 4253 if ( face && FT_IS_SFNT( face ) ) 4254 { 4255 FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); 4256 if ( service ) 4257 table = service->get_table( face, tag ); 4258 } 4259 4260 return table; 4261 } 4262 4263 4264 /* documentation is in tttables.h */ 4265 4266 FT_EXPORT_DEF( FT_Error ) FT_Load_Sfnt_Table(FT_Face face,FT_ULong tag,FT_Long offset,FT_Byte * buffer,FT_ULong * length)4267 FT_Load_Sfnt_Table( FT_Face face, 4268 FT_ULong tag, 4269 FT_Long offset, 4270 FT_Byte* buffer, 4271 FT_ULong* length ) 4272 { 4273 FT_Service_SFNT_Table service; 4274 4275 4276 if ( !face || !FT_IS_SFNT( face ) ) 4277 return FT_THROW( Invalid_Face_Handle ); 4278 4279 FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); 4280 if ( !service ) 4281 return FT_THROW( Unimplemented_Feature ); 4282 4283 return service->load_table( face, tag, offset, buffer, length ); 4284 } 4285 4286 4287 /* documentation is in tttables.h */ 4288 4289 FT_EXPORT_DEF( FT_Error ) FT_Sfnt_Table_Info(FT_Face face,FT_UInt table_index,FT_ULong * tag,FT_ULong * length)4290 FT_Sfnt_Table_Info( FT_Face face, 4291 FT_UInt table_index, 4292 FT_ULong *tag, 4293 FT_ULong *length ) 4294 { 4295 FT_Service_SFNT_Table service; 4296 FT_ULong offset; 4297 4298 4299 /* test for valid `length' delayed to `service->table_info' */ 4300 4301 if ( !face || !FT_IS_SFNT( face ) ) 4302 return FT_THROW( Invalid_Face_Handle ); 4303 4304 FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); 4305 if ( !service ) 4306 return FT_THROW( Unimplemented_Feature ); 4307 4308 return service->table_info( face, table_index, tag, &offset, length ); 4309 } 4310 4311 4312 /* documentation is in tttables.h */ 4313 4314 FT_EXPORT_DEF( FT_ULong ) FT_Get_CMap_Language_ID(FT_CharMap charmap)4315 FT_Get_CMap_Language_ID( FT_CharMap charmap ) 4316 { 4317 FT_Service_TTCMaps service; 4318 FT_Face face; 4319 TT_CMapInfo cmap_info; 4320 4321 4322 if ( !charmap || !charmap->face ) 4323 return 0; 4324 4325 face = charmap->face; 4326 FT_FACE_FIND_SERVICE( face, service, TT_CMAP ); 4327 if ( !service ) 4328 return 0; 4329 if ( service->get_cmap_info( charmap, &cmap_info )) 4330 return 0; 4331 4332 return cmap_info.language; 4333 } 4334 4335 4336 /* documentation is in tttables.h */ 4337 4338 FT_EXPORT_DEF( FT_Long ) FT_Get_CMap_Format(FT_CharMap charmap)4339 FT_Get_CMap_Format( FT_CharMap charmap ) 4340 { 4341 FT_Service_TTCMaps service; 4342 FT_Face face; 4343 TT_CMapInfo cmap_info; 4344 4345 4346 if ( !charmap || !charmap->face ) 4347 return -1; 4348 4349 face = charmap->face; 4350 FT_FACE_FIND_SERVICE( face, service, TT_CMAP ); 4351 if ( !service ) 4352 return -1; 4353 if ( service->get_cmap_info( charmap, &cmap_info )) 4354 return -1; 4355 4356 return cmap_info.format; 4357 } 4358 4359 4360 /* documentation is in ftsizes.h */ 4361 4362 FT_EXPORT_DEF( FT_Error ) FT_Activate_Size(FT_Size size)4363 FT_Activate_Size( FT_Size size ) 4364 { 4365 FT_Face face; 4366 4367 4368 if ( !size ) 4369 return FT_THROW( Invalid_Size_Handle ); 4370 4371 face = size->face; 4372 if ( !face || !face->driver ) 4373 return FT_THROW( Invalid_Face_Handle ); 4374 4375 /* we don't need anything more complex than that; all size objects */ 4376 /* are already listed by the face */ 4377 face->size = size; 4378 4379 return FT_Err_Ok; 4380 } 4381 4382 4383 /*************************************************************************/ 4384 /*************************************************************************/ 4385 /*************************************************************************/ 4386 /**** ****/ 4387 /**** ****/ 4388 /**** R E N D E R E R S ****/ 4389 /**** ****/ 4390 /**** ****/ 4391 /*************************************************************************/ 4392 /*************************************************************************/ 4393 /*************************************************************************/ 4394 4395 /* lookup a renderer by glyph format in the library's list */ 4396 FT_BASE_DEF( FT_Renderer ) FT_Lookup_Renderer(FT_Library library,FT_Glyph_Format format,FT_ListNode * node)4397 FT_Lookup_Renderer( FT_Library library, 4398 FT_Glyph_Format format, 4399 FT_ListNode* node ) 4400 { 4401 FT_ListNode cur; 4402 FT_Renderer result = NULL; 4403 4404 4405 if ( !library ) 4406 goto Exit; 4407 4408 cur = library->renderers.head; 4409 4410 if ( node ) 4411 { 4412 if ( *node ) 4413 cur = (*node)->next; 4414 *node = NULL; 4415 } 4416 4417 while ( cur ) 4418 { 4419 FT_Renderer renderer = FT_RENDERER( cur->data ); 4420 4421 4422 if ( renderer->glyph_format == format ) 4423 { 4424 if ( node ) 4425 *node = cur; 4426 4427 result = renderer; 4428 break; 4429 } 4430 cur = cur->next; 4431 } 4432 4433 Exit: 4434 return result; 4435 } 4436 4437 4438 static FT_Renderer ft_lookup_glyph_renderer(FT_GlyphSlot slot)4439 ft_lookup_glyph_renderer( FT_GlyphSlot slot ) 4440 { 4441 FT_Face face = slot->face; 4442 FT_Library library = FT_FACE_LIBRARY( face ); 4443 FT_Renderer result = library->cur_renderer; 4444 4445 4446 if ( !result || result->glyph_format != slot->format ) 4447 result = FT_Lookup_Renderer( library, slot->format, 0 ); 4448 4449 return result; 4450 } 4451 4452 4453 static void ft_set_current_renderer(FT_Library library)4454 ft_set_current_renderer( FT_Library library ) 4455 { 4456 FT_Renderer renderer; 4457 4458 4459 renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE, 0 ); 4460 library->cur_renderer = renderer; 4461 } 4462 4463 4464 static FT_Error ft_add_renderer(FT_Module module)4465 ft_add_renderer( FT_Module module ) 4466 { 4467 FT_Library library = module->library; 4468 FT_Memory memory = library->memory; 4469 FT_Error error; 4470 FT_ListNode node = NULL; 4471 4472 4473 if ( FT_QNEW( node ) ) 4474 goto Exit; 4475 4476 { 4477 FT_Renderer render = FT_RENDERER( module ); 4478 FT_Renderer_Class* clazz = (FT_Renderer_Class*)module->clazz; 4479 4480 4481 render->clazz = clazz; 4482 render->glyph_format = clazz->glyph_format; 4483 4484 /* allocate raster object if needed */ 4485 if ( clazz->raster_class->raster_new ) 4486 { 4487 error = clazz->raster_class->raster_new( memory, &render->raster ); 4488 if ( error ) 4489 goto Fail; 4490 4491 render->raster_render = clazz->raster_class->raster_render; 4492 render->render = clazz->render_glyph; 4493 } 4494 4495 /* add to list */ 4496 node->data = module; 4497 FT_List_Add( &library->renderers, node ); 4498 4499 ft_set_current_renderer( library ); 4500 } 4501 4502 Fail: 4503 if ( error ) 4504 FT_FREE( node ); 4505 4506 Exit: 4507 return error; 4508 } 4509 4510 4511 static void ft_remove_renderer(FT_Module module)4512 ft_remove_renderer( FT_Module module ) 4513 { 4514 FT_Library library; 4515 FT_Memory memory; 4516 FT_ListNode node; 4517 4518 4519 library = module->library; 4520 if ( !library ) 4521 return; 4522 4523 memory = library->memory; 4524 4525 node = FT_List_Find( &library->renderers, module ); 4526 if ( node ) 4527 { 4528 FT_Renderer render = FT_RENDERER( module ); 4529 4530 4531 /* release raster object, if any */ 4532 if ( render->raster ) 4533 render->clazz->raster_class->raster_done( render->raster ); 4534 4535 /* remove from list */ 4536 FT_List_Remove( &library->renderers, node ); 4537 FT_FREE( node ); 4538 4539 ft_set_current_renderer( library ); 4540 } 4541 } 4542 4543 4544 /* documentation is in ftrender.h */ 4545 4546 FT_EXPORT_DEF( FT_Renderer ) FT_Get_Renderer(FT_Library library,FT_Glyph_Format format)4547 FT_Get_Renderer( FT_Library library, 4548 FT_Glyph_Format format ) 4549 { 4550 /* test for valid `library' delayed to `FT_Lookup_Renderer' */ 4551 4552 return FT_Lookup_Renderer( library, format, 0 ); 4553 } 4554 4555 4556 /* documentation is in ftrender.h */ 4557 4558 FT_EXPORT_DEF( FT_Error ) FT_Set_Renderer(FT_Library library,FT_Renderer renderer,FT_UInt num_params,FT_Parameter * parameters)4559 FT_Set_Renderer( FT_Library library, 4560 FT_Renderer renderer, 4561 FT_UInt num_params, 4562 FT_Parameter* parameters ) 4563 { 4564 FT_ListNode node; 4565 FT_Error error = FT_Err_Ok; 4566 4567 FT_Renderer_SetModeFunc set_mode; 4568 4569 4570 if ( !library ) 4571 { 4572 error = FT_THROW( Invalid_Library_Handle ); 4573 goto Exit; 4574 } 4575 4576 if ( !renderer ) 4577 { 4578 error = FT_THROW( Invalid_Argument ); 4579 goto Exit; 4580 } 4581 4582 if ( num_params > 0 && !parameters ) 4583 { 4584 error = FT_THROW( Invalid_Argument ); 4585 goto Exit; 4586 } 4587 4588 node = FT_List_Find( &library->renderers, renderer ); 4589 if ( !node ) 4590 { 4591 error = FT_THROW( Invalid_Argument ); 4592 goto Exit; 4593 } 4594 4595 FT_List_Up( &library->renderers, node ); 4596 4597 if ( renderer->glyph_format == FT_GLYPH_FORMAT_OUTLINE ) 4598 library->cur_renderer = renderer; 4599 4600 set_mode = renderer->clazz->set_mode; 4601 4602 for ( ; num_params > 0; num_params-- ) 4603 { 4604 error = set_mode( renderer, parameters->tag, parameters->data ); 4605 if ( error ) 4606 break; 4607 parameters++; 4608 } 4609 4610 Exit: 4611 return error; 4612 } 4613 4614 4615 FT_BASE_DEF( FT_Error ) FT_Render_Glyph_Internal(FT_Library library,FT_GlyphSlot slot,FT_Render_Mode render_mode)4616 FT_Render_Glyph_Internal( FT_Library library, 4617 FT_GlyphSlot slot, 4618 FT_Render_Mode render_mode ) 4619 { 4620 FT_Error error = FT_Err_Ok; 4621 FT_Face face = slot->face; 4622 FT_Renderer renderer; 4623 4624 4625 switch ( slot->format ) 4626 { 4627 default: 4628 if ( slot->internal->load_flags & FT_LOAD_COLOR ) 4629 { 4630 FT_LayerIterator iterator; 4631 4632 FT_UInt base_glyph = slot->glyph_index; 4633 4634 FT_Bool have_layers; 4635 FT_UInt glyph_index; 4636 FT_UInt color_index; 4637 4638 4639 /* check whether we have colored glyph layers */ 4640 iterator.p = NULL; 4641 have_layers = FT_Get_Color_Glyph_Layer( face, 4642 base_glyph, 4643 &glyph_index, 4644 &color_index, 4645 &iterator ); 4646 if ( have_layers ) 4647 { 4648 error = FT_New_GlyphSlot( face, NULL ); 4649 if ( !error ) 4650 { 4651 TT_Face ttface = (TT_Face)face; 4652 SFNT_Service sfnt = (SFNT_Service)ttface->sfnt; 4653 4654 4655 do 4656 { 4657 FT_Int32 load_flags = slot->internal->load_flags; 4658 4659 4660 /* disable the `FT_LOAD_COLOR' flag to avoid recursion */ 4661 /* right here in this function */ 4662 load_flags &= ~FT_LOAD_COLOR; 4663 4664 /* render into the new `face->glyph' glyph slot */ 4665 load_flags |= FT_LOAD_RENDER; 4666 4667 error = FT_Load_Glyph( face, glyph_index, load_flags ); 4668 if ( error ) 4669 break; 4670 4671 /* blend new `face->glyph' into old `slot'; */ 4672 /* at the first call, `slot' is still empty */ 4673 error = sfnt->colr_blend( ttface, 4674 color_index, 4675 slot, 4676 face->glyph ); 4677 if ( error ) 4678 break; 4679 4680 } while ( FT_Get_Color_Glyph_Layer( face, 4681 base_glyph, 4682 &glyph_index, 4683 &color_index, 4684 &iterator ) ); 4685 4686 if ( !error ) 4687 slot->format = FT_GLYPH_FORMAT_BITMAP; 4688 4689 /* this call also restores `slot' as the glyph slot */ 4690 FT_Done_GlyphSlot( face->glyph ); 4691 } 4692 4693 if ( !error ) 4694 return error; 4695 4696 /* Failed to do the colored layer. Draw outline instead. */ 4697 slot->format = FT_GLYPH_FORMAT_OUTLINE; 4698 } 4699 } 4700 4701 { 4702 FT_ListNode node = NULL; 4703 4704 4705 /* small shortcut for the very common case */ 4706 if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) 4707 { 4708 renderer = library->cur_renderer; 4709 node = library->renderers.head; 4710 } 4711 else 4712 renderer = FT_Lookup_Renderer( library, slot->format, &node ); 4713 4714 error = FT_ERR( Cannot_Render_Glyph ); 4715 while ( renderer ) 4716 { 4717 error = renderer->render( renderer, slot, render_mode, NULL ); 4718 if ( !error || 4719 FT_ERR_NEQ( error, Cannot_Render_Glyph ) ) 4720 break; 4721 4722 /* FT_Err_Cannot_Render_Glyph is returned if the render mode */ 4723 /* is unsupported by the current renderer for this glyph image */ 4724 /* format. */ 4725 4726 /* now, look for another renderer that supports the same */ 4727 /* format. */ 4728 renderer = FT_Lookup_Renderer( library, slot->format, &node ); 4729 } 4730 4731 /* it is not an error if we cannot render a bitmap glyph */ 4732 if ( FT_ERR_EQ( error, Cannot_Render_Glyph ) && 4733 slot->format == FT_GLYPH_FORMAT_BITMAP ) 4734 error = FT_Err_Ok; 4735 } 4736 } 4737 4738 #ifdef FT_DEBUG_LEVEL_TRACE 4739 4740 #undef FT_COMPONENT 4741 #define FT_COMPONENT checksum 4742 4743 /* 4744 * Computing the MD5 checksum is expensive, unnecessarily distorting a 4745 * possible profiling of FreeType if compiled with tracing support. For 4746 * this reason, we execute the following code only if explicitly 4747 * requested. 4748 */ 4749 4750 /* we use FT_TRACE3 in this block */ 4751 if ( !error && 4752 ft_trace_levels[trace_checksum] >= 3 && 4753 slot->bitmap.buffer ) 4754 { 4755 FT_Bitmap bitmap; 4756 FT_Error err; 4757 4758 4759 FT_Bitmap_Init( &bitmap ); 4760 4761 /* we convert to a single bitmap format for computing the checksum */ 4762 /* this also converts the bitmap flow to `down' (i.e., pitch > 0) */ 4763 err = FT_Bitmap_Convert( library, &slot->bitmap, &bitmap, 1 ); 4764 if ( !err ) 4765 { 4766 MD5_CTX ctx; 4767 unsigned char md5[16]; 4768 unsigned long coverage = 0; 4769 int i, j; 4770 int rows = (int)bitmap.rows; 4771 int pitch = bitmap.pitch; 4772 4773 4774 FT_TRACE3(( "FT_Render_Glyph: bitmap %dx%d, %s (mode %d)\n", 4775 pitch, 4776 rows, 4777 pixel_modes[slot->bitmap.pixel_mode], 4778 slot->bitmap.pixel_mode )); 4779 4780 for ( i = 0; i < rows; i++ ) 4781 for ( j = 0; j < pitch; j++ ) 4782 coverage += bitmap.buffer[i * pitch + j]; 4783 4784 FT_TRACE3(( " Total coverage: %lu\n", coverage )); 4785 4786 MD5_Init( &ctx ); 4787 if ( bitmap.buffer ) 4788 MD5_Update( &ctx, bitmap.buffer, 4789 (unsigned long)rows * (unsigned long)pitch ); 4790 MD5_Final( md5, &ctx ); 4791 4792 FT_TRACE3(( " MD5 checksum: " )); 4793 for ( i = 0; i < 16; i++ ) 4794 FT_TRACE3(( "%02X", md5[i] )); 4795 FT_TRACE3(( "\n" )); 4796 } 4797 4798 FT_Bitmap_Done( library, &bitmap ); 4799 } 4800 4801 /* 4802 * Dump bitmap in Netpbm format (PBM or PGM). 4803 */ 4804 4805 /* we use FT_TRACE7 in this block */ 4806 if ( !error && 4807 ft_trace_levels[trace_checksum] >= 7 && 4808 slot->bitmap.buffer ) 4809 { 4810 if ( slot->bitmap.rows < 128U && 4811 slot->bitmap.width < 128U ) 4812 { 4813 int rows = (int)slot->bitmap.rows; 4814 int width = (int)slot->bitmap.width; 4815 int pitch = slot->bitmap.pitch; 4816 int i, j, m; 4817 4818 unsigned char* topleft = slot->bitmap.buffer; 4819 4820 4821 if ( pitch < 0 ) 4822 topleft -= pitch * ( rows - 1 ); 4823 4824 FT_TRACE7(( "Netpbm image: start\n" )); 4825 switch ( slot->bitmap.pixel_mode ) 4826 { 4827 case FT_PIXEL_MODE_MONO: 4828 FT_TRACE7(( "P1 %d %d\n", width, rows )); 4829 for ( i = 0; i < rows; i++ ) 4830 { 4831 for ( j = 0; j < width; ) 4832 for ( m = 128; m > 0 && j < width; m >>= 1, j++ ) 4833 FT_TRACE7(( " %d", 4834 ( topleft[i * pitch + j / 8] & m ) != 0 )); 4835 FT_TRACE7(( "\n" )); 4836 } 4837 break; 4838 4839 default: 4840 FT_TRACE7(( "P2 %d %d 255\n", width, rows )); 4841 for ( i = 0; i < rows; i++ ) 4842 { 4843 for ( j = 0; j < width; j += 1 ) 4844 FT_TRACE7(( " %3u", topleft[i * pitch + j] )); 4845 FT_TRACE7(( "\n" )); 4846 } 4847 } 4848 FT_TRACE7(( "Netpbm image: end\n" )); 4849 } 4850 else 4851 FT_TRACE7(( "Netpbm image: too large, omitted\n" )); 4852 } 4853 4854 #undef FT_COMPONENT 4855 #define FT_COMPONENT objs 4856 4857 #endif /* FT_DEBUG_LEVEL_TRACE */ 4858 4859 return error; 4860 } 4861 4862 4863 /* documentation is in freetype.h */ 4864 4865 FT_EXPORT_DEF( FT_Error ) FT_Render_Glyph(FT_GlyphSlot slot,FT_Render_Mode render_mode)4866 FT_Render_Glyph( FT_GlyphSlot slot, 4867 FT_Render_Mode render_mode ) 4868 { 4869 FT_Library library; 4870 4871 4872 if ( !slot || !slot->face ) 4873 return FT_THROW( Invalid_Argument ); 4874 4875 library = FT_FACE_LIBRARY( slot->face ); 4876 4877 return FT_Render_Glyph_Internal( library, slot, render_mode ); 4878 } 4879 4880 4881 /*************************************************************************/ 4882 /*************************************************************************/ 4883 /*************************************************************************/ 4884 /**** ****/ 4885 /**** ****/ 4886 /**** M O D U L E S ****/ 4887 /**** ****/ 4888 /**** ****/ 4889 /*************************************************************************/ 4890 /*************************************************************************/ 4891 /*************************************************************************/ 4892 4893 4894 /************************************************************************** 4895 * 4896 * @Function: 4897 * Destroy_Module 4898 * 4899 * @Description: 4900 * Destroys a given module object. For drivers, this also destroys 4901 * all child faces. 4902 * 4903 * @InOut: 4904 * module :: 4905 * A handle to the target driver object. 4906 * 4907 * @Note: 4908 * The driver _must_ be LOCKED! 4909 */ 4910 static void Destroy_Module(FT_Module module)4911 Destroy_Module( FT_Module module ) 4912 { 4913 FT_Memory memory = module->memory; 4914 FT_Module_Class* clazz = module->clazz; 4915 FT_Library library = module->library; 4916 4917 4918 if ( library && library->auto_hinter == module ) 4919 library->auto_hinter = NULL; 4920 4921 /* if the module is a renderer */ 4922 if ( FT_MODULE_IS_RENDERER( module ) ) 4923 ft_remove_renderer( module ); 4924 4925 /* if the module is a font driver, add some steps */ 4926 if ( FT_MODULE_IS_DRIVER( module ) ) 4927 Destroy_Driver( FT_DRIVER( module ) ); 4928 4929 /* finalize the module object */ 4930 if ( clazz->module_done ) 4931 clazz->module_done( module ); 4932 4933 /* discard it */ 4934 FT_FREE( module ); 4935 } 4936 4937 4938 /* documentation is in ftmodapi.h */ 4939 4940 FT_EXPORT_DEF( FT_Error ) FT_Add_Module(FT_Library library,const FT_Module_Class * clazz)4941 FT_Add_Module( FT_Library library, 4942 const FT_Module_Class* clazz ) 4943 { 4944 FT_Error error; 4945 FT_Memory memory; 4946 FT_Module module = NULL; 4947 FT_UInt nn; 4948 4949 4950 #define FREETYPE_VER_FIXED ( ( (FT_Long)FREETYPE_MAJOR << 16 ) | \ 4951 FREETYPE_MINOR ) 4952 4953 if ( !library ) 4954 return FT_THROW( Invalid_Library_Handle ); 4955 4956 if ( !clazz ) 4957 return FT_THROW( Invalid_Argument ); 4958 4959 /* check FreeType version */ 4960 if ( clazz->module_requires > FREETYPE_VER_FIXED ) 4961 return FT_THROW( Invalid_Version ); 4962 4963 /* look for a module with the same name in the library's table */ 4964 for ( nn = 0; nn < library->num_modules; nn++ ) 4965 { 4966 module = library->modules[nn]; 4967 if ( ft_strcmp( module->clazz->module_name, clazz->module_name ) == 0 ) 4968 { 4969 /* this installed module has the same name, compare their versions */ 4970 if ( clazz->module_version <= module->clazz->module_version ) 4971 return FT_THROW( Lower_Module_Version ); 4972 4973 /* remove the module from our list, then exit the loop to replace */ 4974 /* it by our new version.. */ 4975 FT_Remove_Module( library, module ); 4976 break; 4977 } 4978 } 4979 4980 memory = library->memory; 4981 error = FT_Err_Ok; 4982 4983 if ( library->num_modules >= FT_MAX_MODULES ) 4984 { 4985 error = FT_THROW( Too_Many_Drivers ); 4986 goto Exit; 4987 } 4988 4989 /* allocate module object */ 4990 if ( FT_ALLOC( module, clazz->module_size ) ) 4991 goto Exit; 4992 4993 /* base initialization */ 4994 module->library = library; 4995 module->memory = memory; 4996 module->clazz = (FT_Module_Class*)clazz; 4997 4998 /* check whether the module is a renderer - this must be performed */ 4999 /* before the normal module initialization */ 5000 if ( FT_MODULE_IS_RENDERER( module ) ) 5001 { 5002 /* add to the renderers list */ 5003 error = ft_add_renderer( module ); 5004 if ( error ) 5005 goto Fail; 5006 } 5007 5008 /* is the module a auto-hinter? */ 5009 if ( FT_MODULE_IS_HINTER( module ) ) 5010 library->auto_hinter = module; 5011 5012 /* if the module is a font driver */ 5013 if ( FT_MODULE_IS_DRIVER( module ) ) 5014 { 5015 FT_Driver driver = FT_DRIVER( module ); 5016 5017 5018 driver->clazz = (FT_Driver_Class)module->clazz; 5019 } 5020 5021 if ( clazz->module_init ) 5022 { 5023 error = clazz->module_init( module ); 5024 if ( error ) 5025 goto Fail; 5026 } 5027 5028 /* add module to the library's table */ 5029 library->modules[library->num_modules++] = module; 5030 5031 Exit: 5032 return error; 5033 5034 Fail: 5035 if ( FT_MODULE_IS_RENDERER( module ) ) 5036 { 5037 FT_Renderer renderer = FT_RENDERER( module ); 5038 5039 5040 if ( renderer->clazz && 5041 renderer->clazz->glyph_format == FT_GLYPH_FORMAT_OUTLINE && 5042 renderer->raster ) 5043 renderer->clazz->raster_class->raster_done( renderer->raster ); 5044 } 5045 5046 FT_FREE( module ); 5047 goto Exit; 5048 } 5049 5050 5051 /* documentation is in ftmodapi.h */ 5052 5053 FT_EXPORT_DEF( FT_Module ) FT_Get_Module(FT_Library library,const char * module_name)5054 FT_Get_Module( FT_Library library, 5055 const char* module_name ) 5056 { 5057 FT_Module result = NULL; 5058 FT_Module* cur; 5059 FT_Module* limit; 5060 5061 5062 if ( !library || !module_name ) 5063 return result; 5064 5065 cur = library->modules; 5066 limit = cur + library->num_modules; 5067 5068 for ( ; cur < limit; cur++ ) 5069 if ( ft_strcmp( cur[0]->clazz->module_name, module_name ) == 0 ) 5070 { 5071 result = cur[0]; 5072 break; 5073 } 5074 5075 return result; 5076 } 5077 5078 5079 /* documentation is in ftobjs.h */ 5080 5081 FT_BASE_DEF( const void* ) FT_Get_Module_Interface(FT_Library library,const char * mod_name)5082 FT_Get_Module_Interface( FT_Library library, 5083 const char* mod_name ) 5084 { 5085 FT_Module module; 5086 5087 5088 /* test for valid `library' delayed to FT_Get_Module() */ 5089 5090 module = FT_Get_Module( library, mod_name ); 5091 5092 return module ? module->clazz->module_interface : 0; 5093 } 5094 5095 5096 FT_BASE_DEF( FT_Pointer ) ft_module_get_service(FT_Module module,const char * service_id,FT_Bool global)5097 ft_module_get_service( FT_Module module, 5098 const char* service_id, 5099 FT_Bool global ) 5100 { 5101 FT_Pointer result = NULL; 5102 5103 5104 if ( module ) 5105 { 5106 FT_ASSERT( module->clazz && module->clazz->get_interface ); 5107 5108 /* first, look for the service in the module */ 5109 if ( module->clazz->get_interface ) 5110 result = module->clazz->get_interface( module, service_id ); 5111 5112 if ( global && !result ) 5113 { 5114 /* we didn't find it, look in all other modules then */ 5115 FT_Library library = module->library; 5116 FT_Module* cur = library->modules; 5117 FT_Module* limit = cur + library->num_modules; 5118 5119 5120 for ( ; cur < limit; cur++ ) 5121 { 5122 if ( cur[0] != module ) 5123 { 5124 FT_ASSERT( cur[0]->clazz ); 5125 5126 if ( cur[0]->clazz->get_interface ) 5127 { 5128 result = cur[0]->clazz->get_interface( cur[0], service_id ); 5129 if ( result ) 5130 break; 5131 } 5132 } 5133 } 5134 } 5135 } 5136 5137 return result; 5138 } 5139 5140 5141 /* documentation is in ftmodapi.h */ 5142 5143 FT_EXPORT_DEF( FT_Error ) FT_Remove_Module(FT_Library library,FT_Module module)5144 FT_Remove_Module( FT_Library library, 5145 FT_Module module ) 5146 { 5147 /* try to find the module from the table, then remove it from there */ 5148 5149 if ( !library ) 5150 return FT_THROW( Invalid_Library_Handle ); 5151 5152 if ( module ) 5153 { 5154 FT_Module* cur = library->modules; 5155 FT_Module* limit = cur + library->num_modules; 5156 5157 5158 for ( ; cur < limit; cur++ ) 5159 { 5160 if ( cur[0] == module ) 5161 { 5162 /* remove it from the table */ 5163 library->num_modules--; 5164 limit--; 5165 while ( cur < limit ) 5166 { 5167 cur[0] = cur[1]; 5168 cur++; 5169 } 5170 limit[0] = NULL; 5171 5172 /* destroy the module */ 5173 Destroy_Module( module ); 5174 5175 return FT_Err_Ok; 5176 } 5177 } 5178 } 5179 return FT_THROW( Invalid_Driver_Handle ); 5180 } 5181 5182 5183 static FT_Error ft_property_do(FT_Library library,const FT_String * module_name,const FT_String * property_name,void * value,FT_Bool set,FT_Bool value_is_string)5184 ft_property_do( FT_Library library, 5185 const FT_String* module_name, 5186 const FT_String* property_name, 5187 void* value, 5188 FT_Bool set, 5189 FT_Bool value_is_string ) 5190 { 5191 FT_Module* cur; 5192 FT_Module* limit; 5193 FT_Module_Interface interface; 5194 5195 FT_Service_Properties service; 5196 5197 #ifdef FT_DEBUG_LEVEL_ERROR 5198 const FT_String* set_name = "FT_Property_Set"; 5199 const FT_String* get_name = "FT_Property_Get"; 5200 const FT_String* func_name = set ? set_name : get_name; 5201 #endif 5202 5203 FT_Bool missing_func; 5204 5205 5206 if ( !library ) 5207 return FT_THROW( Invalid_Library_Handle ); 5208 5209 if ( !module_name || !property_name || !value ) 5210 return FT_THROW( Invalid_Argument ); 5211 5212 cur = library->modules; 5213 limit = cur + library->num_modules; 5214 5215 /* search module */ 5216 for ( ; cur < limit; cur++ ) 5217 if ( !ft_strcmp( cur[0]->clazz->module_name, module_name ) ) 5218 break; 5219 5220 if ( cur == limit ) 5221 { 5222 FT_TRACE2(( "%s: can't find module `%s'\n", 5223 func_name, module_name )); 5224 return FT_THROW( Missing_Module ); 5225 } 5226 5227 /* check whether we have a service interface */ 5228 if ( !cur[0]->clazz->get_interface ) 5229 { 5230 FT_TRACE2(( "%s: module `%s' doesn't support properties\n", 5231 func_name, module_name )); 5232 return FT_THROW( Unimplemented_Feature ); 5233 } 5234 5235 /* search property service */ 5236 interface = cur[0]->clazz->get_interface( cur[0], 5237 FT_SERVICE_ID_PROPERTIES ); 5238 if ( !interface ) 5239 { 5240 FT_TRACE2(( "%s: module `%s' doesn't support properties\n", 5241 func_name, module_name )); 5242 return FT_THROW( Unimplemented_Feature ); 5243 } 5244 5245 service = (FT_Service_Properties)interface; 5246 5247 if ( set ) 5248 missing_func = FT_BOOL( !service->set_property ); 5249 else 5250 missing_func = FT_BOOL( !service->get_property ); 5251 5252 if ( missing_func ) 5253 { 5254 FT_TRACE2(( "%s: property service of module `%s' is broken\n", 5255 func_name, module_name )); 5256 return FT_THROW( Unimplemented_Feature ); 5257 } 5258 5259 return set ? service->set_property( cur[0], 5260 property_name, 5261 value, 5262 value_is_string ) 5263 : service->get_property( cur[0], 5264 property_name, 5265 value ); 5266 } 5267 5268 5269 /* documentation is in ftmodapi.h */ 5270 5271 FT_EXPORT_DEF( FT_Error ) FT_Property_Set(FT_Library library,const FT_String * module_name,const FT_String * property_name,const void * value)5272 FT_Property_Set( FT_Library library, 5273 const FT_String* module_name, 5274 const FT_String* property_name, 5275 const void* value ) 5276 { 5277 return ft_property_do( library, 5278 module_name, 5279 property_name, 5280 (void*)value, 5281 TRUE, 5282 FALSE ); 5283 } 5284 5285 5286 /* documentation is in ftmodapi.h */ 5287 5288 FT_EXPORT_DEF( FT_Error ) FT_Property_Get(FT_Library library,const FT_String * module_name,const FT_String * property_name,void * value)5289 FT_Property_Get( FT_Library library, 5290 const FT_String* module_name, 5291 const FT_String* property_name, 5292 void* value ) 5293 { 5294 return ft_property_do( library, 5295 module_name, 5296 property_name, 5297 value, 5298 FALSE, 5299 FALSE ); 5300 } 5301 5302 5303 #ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES 5304 5305 /* this variant is used for handling the FREETYPE_PROPERTIES */ 5306 /* environment variable */ 5307 5308 FT_BASE_DEF( FT_Error ) ft_property_string_set(FT_Library library,const FT_String * module_name,const FT_String * property_name,FT_String * value)5309 ft_property_string_set( FT_Library library, 5310 const FT_String* module_name, 5311 const FT_String* property_name, 5312 FT_String* value ) 5313 { 5314 return ft_property_do( library, 5315 module_name, 5316 property_name, 5317 (void*)value, 5318 TRUE, 5319 TRUE ); 5320 } 5321 5322 #endif 5323 5324 5325 /*************************************************************************/ 5326 /*************************************************************************/ 5327 /*************************************************************************/ 5328 /**** ****/ 5329 /**** ****/ 5330 /**** L I B R A R Y ****/ 5331 /**** ****/ 5332 /**** ****/ 5333 /*************************************************************************/ 5334 /*************************************************************************/ 5335 /*************************************************************************/ 5336 5337 5338 /* documentation is in ftmodapi.h */ 5339 5340 FT_EXPORT_DEF( FT_Error ) FT_Reference_Library(FT_Library library)5341 FT_Reference_Library( FT_Library library ) 5342 { 5343 if ( !library ) 5344 return FT_THROW( Invalid_Library_Handle ); 5345 5346 library->refcount++; 5347 5348 return FT_Err_Ok; 5349 } 5350 5351 5352 /* documentation is in ftmodapi.h */ 5353 5354 FT_EXPORT_DEF( FT_Error ) FT_New_Library(FT_Memory memory,FT_Library * alibrary)5355 FT_New_Library( FT_Memory memory, 5356 FT_Library *alibrary ) 5357 { 5358 FT_Library library = NULL; 5359 FT_Error error; 5360 5361 5362 if ( !memory || !alibrary ) 5363 return FT_THROW( Invalid_Argument ); 5364 5365 #ifndef FT_DEBUG_LOGGING 5366 #ifdef FT_DEBUG_LEVEL_ERROR 5367 /* init debugging support */ 5368 ft_debug_init(); 5369 #endif /* FT_DEBUG_LEVEL_ERROR */ 5370 #endif /* !FT_DEBUG_LOGGING */ 5371 5372 /* first of all, allocate the library object */ 5373 if ( FT_NEW( library ) ) 5374 return error; 5375 5376 library->memory = memory; 5377 5378 library->version_major = FREETYPE_MAJOR; 5379 library->version_minor = FREETYPE_MINOR; 5380 library->version_patch = FREETYPE_PATCH; 5381 5382 library->refcount = 1; 5383 5384 /* That's ok now */ 5385 *alibrary = library; 5386 5387 return FT_Err_Ok; 5388 } 5389 5390 5391 /* documentation is in freetype.h */ 5392 5393 FT_EXPORT_DEF( void ) FT_Library_Version(FT_Library library,FT_Int * amajor,FT_Int * aminor,FT_Int * apatch)5394 FT_Library_Version( FT_Library library, 5395 FT_Int *amajor, 5396 FT_Int *aminor, 5397 FT_Int *apatch ) 5398 { 5399 FT_Int major = 0; 5400 FT_Int minor = 0; 5401 FT_Int patch = 0; 5402 5403 5404 if ( library ) 5405 { 5406 major = library->version_major; 5407 minor = library->version_minor; 5408 patch = library->version_patch; 5409 } 5410 5411 if ( amajor ) 5412 *amajor = major; 5413 5414 if ( aminor ) 5415 *aminor = minor; 5416 5417 if ( apatch ) 5418 *apatch = patch; 5419 } 5420 5421 5422 /* documentation is in ftmodapi.h */ 5423 5424 FT_EXPORT_DEF( FT_Error ) FT_Done_Library(FT_Library library)5425 FT_Done_Library( FT_Library library ) 5426 { 5427 FT_Memory memory; 5428 5429 5430 if ( !library ) 5431 return FT_THROW( Invalid_Library_Handle ); 5432 5433 library->refcount--; 5434 if ( library->refcount > 0 ) 5435 goto Exit; 5436 5437 memory = library->memory; 5438 5439 /* 5440 * Close all faces in the library. If we don't do this, we can have 5441 * some subtle memory leaks. 5442 * 5443 * Example: 5444 * 5445 * - the cff font driver uses the pshinter module in cff_size_done 5446 * - if the pshinter module is destroyed before the cff font driver, 5447 * opened FT_Face objects managed by the driver are not properly 5448 * destroyed, resulting in a memory leak 5449 * 5450 * Some faces are dependent on other faces, like Type42 faces that 5451 * depend on TrueType faces synthesized internally. 5452 * 5453 * The order of drivers should be specified in driver_name[]. 5454 */ 5455 { 5456 FT_UInt m, n; 5457 const char* driver_name[] = { "type42", NULL }; 5458 5459 5460 for ( m = 0; 5461 m < sizeof ( driver_name ) / sizeof ( driver_name[0] ); 5462 m++ ) 5463 { 5464 for ( n = 0; n < library->num_modules; n++ ) 5465 { 5466 FT_Module module = library->modules[n]; 5467 const char* module_name = module->clazz->module_name; 5468 FT_List faces; 5469 5470 5471 if ( driver_name[m] && 5472 ft_strcmp( module_name, driver_name[m] ) != 0 ) 5473 continue; 5474 5475 if ( ( module->clazz->module_flags & FT_MODULE_FONT_DRIVER ) == 0 ) 5476 continue; 5477 5478 FT_TRACE7(( "FT_Done_Library: close faces for %s\n", module_name )); 5479 5480 faces = &FT_DRIVER( module )->faces_list; 5481 while ( faces->head ) 5482 { 5483 FT_Done_Face( FT_FACE( faces->head->data ) ); 5484 if ( faces->head ) 5485 FT_TRACE0(( "FT_Done_Library: failed to free some faces\n" )); 5486 } 5487 } 5488 } 5489 } 5490 5491 /* Close all other modules in the library */ 5492 #if 1 5493 /* XXX Modules are removed in the reversed order so that */ 5494 /* type42 module is removed before truetype module. This */ 5495 /* avoids double free in some occasions. It is a hack. */ 5496 while ( library->num_modules > 0 ) 5497 FT_Remove_Module( library, 5498 library->modules[library->num_modules - 1] ); 5499 #else 5500 { 5501 FT_UInt n; 5502 5503 5504 for ( n = 0; n < library->num_modules; n++ ) 5505 { 5506 FT_Module module = library->modules[n]; 5507 5508 5509 if ( module ) 5510 { 5511 Destroy_Module( module ); 5512 library->modules[n] = NULL; 5513 } 5514 } 5515 } 5516 #endif 5517 5518 FT_FREE( library ); 5519 5520 Exit: 5521 return FT_Err_Ok; 5522 } 5523 5524 5525 /* documentation is in ftmodapi.h */ 5526 5527 FT_EXPORT_DEF( void ) FT_Set_Debug_Hook(FT_Library library,FT_UInt hook_index,FT_DebugHook_Func debug_hook)5528 FT_Set_Debug_Hook( FT_Library library, 5529 FT_UInt hook_index, 5530 FT_DebugHook_Func debug_hook ) 5531 { 5532 if ( library && debug_hook && 5533 hook_index < 5534 ( sizeof ( library->debug_hooks ) / sizeof ( void* ) ) ) 5535 library->debug_hooks[hook_index] = debug_hook; 5536 } 5537 5538 5539 /* documentation is in ftmodapi.h */ 5540 5541 FT_EXPORT_DEF( FT_TrueTypeEngineType ) FT_Get_TrueType_Engine_Type(FT_Library library)5542 FT_Get_TrueType_Engine_Type( FT_Library library ) 5543 { 5544 FT_TrueTypeEngineType result = FT_TRUETYPE_ENGINE_TYPE_NONE; 5545 5546 5547 if ( library ) 5548 { 5549 FT_Module module = FT_Get_Module( library, "truetype" ); 5550 5551 5552 if ( module ) 5553 { 5554 FT_Service_TrueTypeEngine service; 5555 5556 5557 service = (FT_Service_TrueTypeEngine) 5558 ft_module_get_service( module, 5559 FT_SERVICE_ID_TRUETYPE_ENGINE, 5560 0 ); 5561 if ( service ) 5562 result = service->engine_type; 5563 } 5564 } 5565 5566 return result; 5567 } 5568 5569 5570 /* documentation is in freetype.h */ 5571 5572 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)5573 FT_Get_SubGlyph_Info( FT_GlyphSlot glyph, 5574 FT_UInt sub_index, 5575 FT_Int *p_index, 5576 FT_UInt *p_flags, 5577 FT_Int *p_arg1, 5578 FT_Int *p_arg2, 5579 FT_Matrix *p_transform ) 5580 { 5581 FT_Error error = FT_ERR( Invalid_Argument ); 5582 5583 5584 if ( glyph && 5585 glyph->subglyphs && 5586 glyph->format == FT_GLYPH_FORMAT_COMPOSITE && 5587 sub_index < glyph->num_subglyphs ) 5588 { 5589 FT_SubGlyph subg = glyph->subglyphs + sub_index; 5590 5591 5592 *p_index = subg->index; 5593 *p_flags = subg->flags; 5594 *p_arg1 = subg->arg1; 5595 *p_arg2 = subg->arg2; 5596 *p_transform = subg->transform; 5597 5598 error = FT_Err_Ok; 5599 } 5600 5601 return error; 5602 } 5603 5604 5605 /* documentation is in freetype.h */ 5606 5607 FT_EXPORT_DEF( FT_Bool ) FT_Get_Color_Glyph_Layer(FT_Face face,FT_UInt base_glyph,FT_UInt * aglyph_index,FT_UInt * acolor_index,FT_LayerIterator * iterator)5608 FT_Get_Color_Glyph_Layer( FT_Face face, 5609 FT_UInt base_glyph, 5610 FT_UInt *aglyph_index, 5611 FT_UInt *acolor_index, 5612 FT_LayerIterator* iterator ) 5613 { 5614 TT_Face ttface; 5615 SFNT_Service sfnt; 5616 5617 5618 if ( !face || 5619 !aglyph_index || 5620 !acolor_index || 5621 !iterator || 5622 base_glyph >= (FT_UInt)face->num_glyphs ) 5623 return 0; 5624 5625 if ( !FT_IS_SFNT( face ) ) 5626 return 0; 5627 5628 ttface = (TT_Face)face; 5629 sfnt = (SFNT_Service)ttface->sfnt; 5630 5631 if ( sfnt->get_colr_layer ) 5632 return sfnt->get_colr_layer( ttface, 5633 base_glyph, 5634 aglyph_index, 5635 acolor_index, 5636 iterator ); 5637 else 5638 return 0; 5639 } 5640 5641 5642 /* documentation is in freetype.h */ 5643 5644 FT_EXPORT_DEF( FT_Bool ) FT_Get_Color_Glyph_Paint(FT_Face face,FT_UInt base_glyph,FT_Color_Root_Transform root_transform,FT_OpaquePaint * paint)5645 FT_Get_Color_Glyph_Paint( FT_Face face, 5646 FT_UInt base_glyph, 5647 FT_Color_Root_Transform root_transform, 5648 FT_OpaquePaint* paint ) 5649 { 5650 TT_Face ttface; 5651 SFNT_Service sfnt; 5652 5653 5654 if ( !face || !paint ) 5655 return 0; 5656 5657 if ( !FT_IS_SFNT( face ) ) 5658 return 0; 5659 5660 ttface = (TT_Face)face; 5661 sfnt = (SFNT_Service)ttface->sfnt; 5662 5663 if ( sfnt->get_colr_layer ) 5664 return sfnt->get_colr_glyph_paint( ttface, 5665 base_glyph, 5666 root_transform, 5667 paint ); 5668 else 5669 return 0; 5670 } 5671 5672 5673 /* documentation is in ftcolor.h */ 5674 5675 FT_EXPORT_DEF( FT_Bool ) FT_Get_Color_Glyph_ClipBox(FT_Face face,FT_UInt base_glyph,FT_ClipBox * clip_box)5676 FT_Get_Color_Glyph_ClipBox( FT_Face face, 5677 FT_UInt base_glyph, 5678 FT_ClipBox* clip_box ) 5679 { 5680 TT_Face ttface; 5681 SFNT_Service sfnt; 5682 5683 5684 if ( !face || !clip_box ) 5685 return 0; 5686 5687 if ( !FT_IS_SFNT( face ) ) 5688 return 0; 5689 5690 ttface = (TT_Face)face; 5691 sfnt = (SFNT_Service)ttface->sfnt; 5692 5693 if ( sfnt->get_color_glyph_clipbox ) 5694 return sfnt->get_color_glyph_clipbox( ttface, 5695 base_glyph, 5696 clip_box ); 5697 else 5698 return 0; 5699 } 5700 5701 5702 /* documentation is in freetype.h */ 5703 5704 FT_EXPORT_DEF( FT_Bool ) FT_Get_Paint_Layers(FT_Face face,FT_LayerIterator * layer_iterator,FT_OpaquePaint * paint)5705 FT_Get_Paint_Layers( FT_Face face, 5706 FT_LayerIterator* layer_iterator, 5707 FT_OpaquePaint* paint ) 5708 { 5709 TT_Face ttface; 5710 SFNT_Service sfnt; 5711 5712 5713 if ( !face || !paint || !layer_iterator ) 5714 return 0; 5715 5716 if ( !FT_IS_SFNT( face ) ) 5717 return 0; 5718 5719 ttface = (TT_Face)face; 5720 sfnt = (SFNT_Service)ttface->sfnt; 5721 5722 if ( sfnt->get_paint_layers ) 5723 return sfnt->get_paint_layers( ttface, layer_iterator, paint ); 5724 else 5725 return 0; 5726 } 5727 5728 5729 /* documentation is in freetype.h */ 5730 5731 FT_EXPORT_DEF( FT_Bool ) FT_Get_Paint(FT_Face face,FT_OpaquePaint opaque_paint,FT_COLR_Paint * paint)5732 FT_Get_Paint( FT_Face face, 5733 FT_OpaquePaint opaque_paint, 5734 FT_COLR_Paint* paint ) 5735 { 5736 TT_Face ttface; 5737 SFNT_Service sfnt; 5738 5739 5740 if ( !face || !paint || !paint ) 5741 return 0; 5742 5743 if ( !FT_IS_SFNT( face ) ) 5744 return 0; 5745 5746 ttface = (TT_Face)face; 5747 sfnt = (SFNT_Service)ttface->sfnt; 5748 5749 if ( sfnt->get_paint ) 5750 return sfnt->get_paint( ttface, opaque_paint, paint ); 5751 else 5752 return 0; 5753 } 5754 5755 5756 /* documentation is in freetype.h */ 5757 5758 FT_EXPORT_DEF( FT_Bool ) FT_Get_Colorline_Stops(FT_Face face,FT_ColorStop * color_stop,FT_ColorStopIterator * iterator)5759 FT_Get_Colorline_Stops ( FT_Face face, 5760 FT_ColorStop * color_stop, 5761 FT_ColorStopIterator *iterator ) 5762 { 5763 TT_Face ttface; 5764 SFNT_Service sfnt; 5765 5766 5767 if ( !face || !color_stop || !iterator ) 5768 return 0; 5769 5770 if ( !FT_IS_SFNT( face ) ) 5771 return 0; 5772 5773 ttface = (TT_Face)face; 5774 sfnt = (SFNT_Service)ttface->sfnt; 5775 5776 if ( sfnt->get_colorline_stops ) 5777 return sfnt->get_colorline_stops ( ttface, color_stop, iterator ); 5778 else 5779 return 0; 5780 } 5781 5782 5783 /* END */ 5784