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