ttgload.c revision 4937a3ebd2c77ece7796b312eb3814ce1b18b03b
1/***************************************************************************/ 2/* */ 3/* ttgload.c */ 4/* */ 5/* TrueType Glyph Loader (body). */ 6/* */ 7/* Copyright 1996-2001 by */ 8/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9/* */ 10/* This file is part of the FreeType project, and may only be used, */ 11/* modified, and distributed under the terms of the FreeType project */ 12/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13/* this file you indicate that you have read the license and */ 14/* understand and accept it fully. */ 15/* */ 16/***************************************************************************/ 17 18 19#include <ft2build.h> 20#include FT_INTERNAL_DEBUG_H 21#include FT_INTERNAL_CALC_H 22#include FT_INTERNAL_STREAM_H 23#include FT_INTERNAL_SFNT_H 24#include FT_TRUETYPE_TAGS_H 25#include FT_OUTLINE_H 26 27#include "ttgload.h" 28 29#include "tterrors.h" 30 31 32 /*************************************************************************/ 33 /* */ 34 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 35 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 36 /* messages during execution. */ 37 /* */ 38#undef FT_COMPONENT 39#define FT_COMPONENT trace_ttgload 40 41 42 /*************************************************************************/ 43 /* */ 44 /* Composite font flags. */ 45 /* */ 46#define ARGS_ARE_WORDS 0x001 47#define ARGS_ARE_XY_VALUES 0x002 48#define ROUND_XY_TO_GRID 0x004 49#define WE_HAVE_A_SCALE 0x008 50/* reserved 0x010 */ 51#define MORE_COMPONENTS 0x020 52#define WE_HAVE_AN_XY_SCALE 0x040 53#define WE_HAVE_A_2X2 0x080 54#define WE_HAVE_INSTR 0x100 55#define USE_MY_METRICS 0x200 56 57 58 59 /*************************************************************************/ 60 /* */ 61 /* <Function> */ 62 /* TT_Get_Metrics */ 63 /* */ 64 /* <Description> */ 65 /* Returns the horizontal or vertical metrics in font units for a */ 66 /* given glyph. The metrics are the left side bearing (resp. top */ 67 /* side bearing) and advance width (resp. advance height). */ 68 /* */ 69 /* <Input> */ 70 /* header :: A pointer to either the horizontal or vertical metrics */ 71 /* structure. */ 72 /* */ 73 /* index :: The glyph index. */ 74 /* */ 75 /* <Output> */ 76 /* bearing :: The bearing, either left side or top side. */ 77 /* */ 78 /* advance :: The advance width resp. advance height. */ 79 /* */ 80 /* <Note> */ 81 /* This function will much probably move to another component in the */ 82 /* near future, but I haven't decided which yet. */ 83 /* */ 84 FT_LOCAL_DEF void 85 TT_Get_Metrics( TT_HoriHeader* header, 86 FT_UInt index, 87 FT_Short* bearing, 88 FT_UShort* advance ) 89 { 90 TT_LongMetrics* longs_m; 91 FT_UShort k = header->number_Of_HMetrics; 92 93 94 if ( index < (FT_UInt)k ) 95 { 96 longs_m = (TT_LongMetrics*)header->long_metrics + index; 97 *bearing = longs_m->bearing; 98 *advance = longs_m->advance; 99 } 100 else 101 { 102 *bearing = ((TT_ShortMetrics*)header->short_metrics)[index - k]; 103 *advance = ((TT_LongMetrics*)header->long_metrics)[k - 1].advance; 104 } 105 } 106 107 108 /*************************************************************************/ 109 /* */ 110 /* Returns the horizontal metrics in font units for a given glyph. If */ 111 /* `check' is true, take care of monospaced fonts by returning the */ 112 /* advance width maximum. */ 113 /* */ 114 static void 115 Get_HMetrics( TT_Face face, 116 FT_UInt index, 117 FT_Bool check, 118 FT_Short* lsb, 119 FT_UShort* aw ) 120 { 121 TT_Get_Metrics( &face->horizontal, index, lsb, aw ); 122 123 if ( check && face->postscript.isFixedPitch ) 124 *aw = face->horizontal.advance_Width_Max; 125 } 126 127 128 /*************************************************************************/ 129 /* */ 130 /* Returns the advance width table for a given pixel size if it is */ 131 /* found in the font's `hdmx' table (if any). */ 132 /* */ 133 static FT_Byte* 134 Get_Advance_Widths( TT_Face face, 135 FT_UShort ppem ) 136 { 137 FT_UShort n; 138 139 for ( n = 0; n < face->hdmx.num_records; n++ ) 140 if ( face->hdmx.records[n].ppem == ppem ) 141 return face->hdmx.records[n].widths; 142 143 return NULL; 144 } 145 146 147#define cur_to_org( n, zone ) \ 148 MEM_Copy( (zone)->org, (zone)->cur, (n) * sizeof ( FT_Vector ) ) 149 150#define org_to_cur( n, zone ) \ 151 MEM_Copy( (zone)->cur, (zone)->org, (n) * sizeof ( FT_Vector ) ) 152 153 154 /*************************************************************************/ 155 /* */ 156 /* Translates an array of coordinates. */ 157 /* */ 158 static void 159 translate_array( FT_UInt n, 160 FT_Vector* coords, 161 FT_Pos delta_x, 162 FT_Pos delta_y ) 163 { 164 FT_UInt k; 165 166 167 if ( delta_x ) 168 for ( k = 0; k < n; k++ ) 169 coords[k].x += delta_x; 170 171 if ( delta_y ) 172 for ( k = 0; k < n; k++ ) 173 coords[k].y += delta_y; 174 } 175 176 177 static void 178 tt_prepare_zone( TT_GlyphZone* zone, 179 FT_GlyphLoad* load, 180 FT_UInt start_point, 181 FT_UInt start_contour ) 182 { 183 zone->n_points = (FT_UShort)( load->outline.n_points - start_point ); 184 zone->n_contours = (FT_Short) ( load->outline.n_contours - start_contour ); 185 zone->org = load->extra_points + start_point; 186 zone->cur = load->outline.points + start_point; 187 zone->tags = (FT_Byte*)load->outline.tags + start_point; 188 zone->contours = (FT_UShort*)load->outline.contours + start_contour; 189 } 190 191 192#undef IS_HINTED 193#define IS_HINTED( flags ) ( ( flags & FT_LOAD_NO_HINTING ) == 0 ) 194 195 196 /*************************************************************************/ 197 /* */ 198 /* The following functions are used by default with TrueType fonts. */ 199 /* However, they can be replaced by alternatives if we need to support */ 200 /* TrueType-compressed formats (like MicroType) in the future. */ 201 /* */ 202 /*************************************************************************/ 203 204 FT_CALLBACK_DEF( FT_Error ) 205 TT_Access_Glyph_Frame( TT_Loader* loader, 206 FT_UInt glyph_index, 207 FT_ULong offset, 208 FT_UInt byte_count ) 209 { 210 FT_Error error; 211 FT_Stream stream = loader->stream; 212 213 /* for non-debug mode */ 214 FT_UNUSED( glyph_index ); 215 216 217 FT_TRACE5(( "Glyph %ld\n", glyph_index )); 218 219 /* the following line sets the `error' variable through macros! */ 220 if ( FILE_Seek( offset ) || ACCESS_Frame( byte_count ) ) 221 return error; 222 223 return TT_Err_Ok; 224 } 225 226 227 FT_CALLBACK_DEF( void ) 228 TT_Forget_Glyph_Frame( TT_Loader* loader ) 229 { 230 FT_Stream stream = loader->stream; 231 232 233 FORGET_Frame(); 234 } 235 236 237 FT_CALLBACK_DEF( FT_Error ) 238 TT_Load_Glyph_Header( TT_Loader* loader ) 239 { 240 FT_Stream stream = loader->stream; 241 242 243 loader->n_contours = GET_Short(); 244 245 loader->bbox.xMin = GET_Short(); 246 loader->bbox.yMin = GET_Short(); 247 loader->bbox.xMax = GET_Short(); 248 loader->bbox.yMax = GET_Short(); 249 250 FT_TRACE5(( " # of contours: %d\n", loader->n_contours )); 251 FT_TRACE5(( " xMin: %4d xMax: %4d\n", loader->bbox.xMin, 252 loader->bbox.xMax )); 253 FT_TRACE5(( " yMin: %4d yMax: %4d\n", loader->bbox.yMin, 254 loader->bbox.yMax )); 255 256 return TT_Err_Ok; 257 } 258 259 260 FT_CALLBACK_DEF( FT_Error ) 261 TT_Load_Simple_Glyph( TT_Loader* load ) 262 { 263 FT_Error error; 264 FT_Stream stream = load->stream; 265 FT_GlyphLoader* gloader = load->gloader; 266 FT_Int n_contours = load->n_contours; 267 FT_Outline* outline; 268 TT_Face face = (TT_Face)load->face; 269 TT_GlyphSlot slot = (TT_GlyphSlot)load->glyph; 270 FT_UShort n_ins; 271 FT_Int n, n_points; 272 273 274 /* reading the contours endpoints & number of points */ 275 { 276 short* cur = gloader->current.outline.contours; 277 short* limit = cur + n_contours; 278 279 280 for ( ; cur < limit; cur++ ) 281 cur[0] = GET_UShort(); 282 283 n_points = 0; 284 if ( n_contours > 0 ) 285 n_points = cur[-1] + 1; 286 287 error = FT_GlyphLoader_Check_Points( gloader, n_points + 2, 0 ); 288 if ( error ) 289 goto Fail; 290 291 outline = &gloader->current.outline; 292 } 293 294 /* reading the bytecode instructions */ 295 slot->control_len = 0; 296 slot->control_data = 0; 297 298 n_ins = GET_UShort(); 299 300 FT_TRACE5(( " Instructions size: %d\n", n_ins )); 301 302 if ( n_ins > face->max_profile.maxSizeOfInstructions ) 303 { 304 FT_TRACE0(( "ERROR: Too many instructions!\n" )); 305 error = TT_Err_Too_Many_Hints; 306 goto Fail; 307 } 308 309 if ( stream->cursor + n_ins > stream->limit ) 310 { 311 FT_TRACE0(( "ERROR: Instruction count mismatch!\n" )); 312 error = TT_Err_Too_Many_Hints; 313 goto Fail; 314 } 315 316#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 317 318 if ( ( load->load_flags & 319 ( FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING ) ) == 0 && 320 load->instructions ) 321 { 322 slot->control_len = n_ins; 323 slot->control_data = load->instructions; 324 325 MEM_Copy( load->instructions, stream->cursor, n_ins ); 326 } 327 328#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ 329 330 stream->cursor += n_ins; 331 332 /* reading the point tags */ 333 334 { 335 FT_Byte* flag = (FT_Byte*)outline->tags; 336 FT_Byte* limit = flag + n_points; 337 FT_Byte c, count; 338 339 340 for ( ; flag < limit; flag++ ) 341 { 342 *flag = c = GET_Byte(); 343 if ( c & 8 ) 344 { 345 for ( count = GET_Byte(); count > 0; count-- ) 346 *++flag = c; 347 } 348 } 349 } 350 351 /* reading the X coordinates */ 352 353 { 354 FT_Vector* vec = outline->points; 355 FT_Vector* limit = vec + n_points; 356 FT_Byte* flag = (FT_Byte*)outline->tags; 357 FT_Pos x = 0; 358 359 360 for ( ; vec < limit; vec++, flag++ ) 361 { 362 FT_Pos y = 0; 363 364 365 if ( *flag & 2 ) 366 { 367 y = GET_Byte(); 368 if ( ( *flag & 16 ) == 0 ) 369 y = -y; 370 } 371 else if ( ( *flag & 16 ) == 0 ) 372 y = GET_Short(); 373 374 x += y; 375 vec->x = x; 376 } 377 } 378 379 /* reading the Y coordinates */ 380 381 { 382 FT_Vector* vec = gloader->current.outline.points; 383 FT_Vector* limit = vec + n_points; 384 FT_Byte* flag = (FT_Byte*)outline->tags; 385 FT_Pos x = 0; 386 387 388 for ( ; vec < limit; vec++, flag++ ) 389 { 390 FT_Pos y = 0; 391 392 393 if ( *flag & 4 ) 394 { 395 y = GET_Byte(); 396 if ( ( *flag & 32 ) == 0 ) 397 y = -y; 398 } 399 else if ( ( *flag & 32 ) == 0 ) 400 y = GET_Short(); 401 402 x += y; 403 vec->y = x; 404 } 405 } 406 407 /* clear the touch tags */ 408 for ( n = 0; n < n_points; n++ ) 409 outline->tags[n] &= FT_Curve_Tag_On; 410 411 outline->n_points = (FT_UShort)n_points; 412 outline->n_contours = (FT_Short) n_contours; 413 414 Fail: 415 return error; 416 } 417 418 419 FT_CALLBACK_DEF( FT_Error ) 420 TT_Load_Composite_Glyph( TT_Loader* loader ) 421 { 422 FT_Error error; 423 FT_Stream stream = loader->stream; 424 FT_GlyphLoader* gloader = loader->gloader; 425 FT_SubGlyph* subglyph; 426 FT_UInt num_subglyphs; 427 428 429 num_subglyphs = 0; 430 431 do 432 { 433 FT_Fixed xx, xy, yy, yx; 434 435 436 /* check that we can load a new subglyph */ 437 error = FT_GlyphLoader_Check_Subglyphs( gloader, num_subglyphs + 1 ); 438 if ( error ) 439 goto Fail; 440 441 subglyph = gloader->current.subglyphs + num_subglyphs; 442 443 subglyph->arg1 = subglyph->arg2 = 0; 444 445 subglyph->flags = GET_UShort(); 446 subglyph->index = GET_UShort(); 447 448 /* read arguments */ 449 if ( subglyph->flags & ARGS_ARE_WORDS ) 450 { 451 subglyph->arg1 = GET_Short(); 452 subglyph->arg2 = GET_Short(); 453 } 454 else 455 { 456 subglyph->arg1 = GET_Char(); 457 subglyph->arg2 = GET_Char(); 458 } 459 460 /* read transform */ 461 xx = yy = 0x10000L; 462 xy = yx = 0; 463 464 if ( subglyph->flags & WE_HAVE_A_SCALE ) 465 { 466 xx = (FT_Fixed)GET_Short() << 2; 467 yy = xx; 468 } 469 else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE ) 470 { 471 xx = (FT_Fixed)GET_Short() << 2; 472 yy = (FT_Fixed)GET_Short() << 2; 473 } 474 else if ( subglyph->flags & WE_HAVE_A_2X2 ) 475 { 476 xx = (FT_Fixed)GET_Short() << 2; 477 xy = (FT_Fixed)GET_Short() << 2; 478 yx = (FT_Fixed)GET_Short() << 2; 479 yy = (FT_Fixed)GET_Short() << 2; 480 } 481 482 subglyph->transform.xx = xx; 483 subglyph->transform.xy = xy; 484 subglyph->transform.yx = yx; 485 subglyph->transform.yy = yy; 486 487 num_subglyphs++; 488 489 } while ( subglyph->flags & MORE_COMPONENTS ); 490 491 gloader->current.num_subglyphs = num_subglyphs; 492 493#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 494 { 495 /* we must undo the ACCESS_Frame in order to point to the */ 496 /* composite instructions, if we find some. */ 497 /* we will process them later... */ 498 /* */ 499 loader->ins_pos = (FT_ULong)( FILE_Pos() + 500 stream->cursor - stream->limit ); 501 } 502#endif 503 504 Fail: 505 return error; 506 } 507 508 509 FT_LOCAL_DEF void 510 TT_Init_Glyph_Loading( TT_Face face ) 511 { 512 face->access_glyph_frame = TT_Access_Glyph_Frame; 513 face->read_glyph_header = TT_Load_Glyph_Header; 514 face->read_simple_glyph = TT_Load_Simple_Glyph; 515 face->read_composite_glyph = TT_Load_Composite_Glyph; 516 face->forget_glyph_frame = TT_Forget_Glyph_Frame; 517 } 518 519 520 /*************************************************************************/ 521 /* */ 522 /* <Function> */ 523 /* TT_Process_Simple_Glyph */ 524 /* */ 525 /* <Description> */ 526 /* Once a simple glyph has been loaded, it needs to be processed. */ 527 /* Usually, this means scaling and hinting through bytecode */ 528 /* interpretation. */ 529 /* */ 530 static FT_Error 531 TT_Process_Simple_Glyph( TT_Loader* load, 532 FT_Bool debug ) 533 { 534 FT_GlyphLoader* gloader = load->gloader; 535 FT_Outline* outline = &gloader->current.outline; 536 FT_UInt n_points = outline->n_points; 537 FT_UInt n_ins; 538 TT_GlyphZone* zone = &load->zone; 539 FT_Error error = TT_Err_Ok; 540 541 FT_UNUSED( debug ); /* used by truetype interpreter only */ 542 543 544 n_ins = load->glyph->control_len; 545 546 /* add shadow points */ 547 548 /* Now add the two shadow points at n and n + 1. */ 549 /* We need the left side bearing and advance width. */ 550 551 { 552 FT_Vector* pp1; 553 FT_Vector* pp2; 554 555 556 /* pp1 = xMin - lsb */ 557 pp1 = outline->points + n_points; 558 pp1->x = load->bbox.xMin - load->left_bearing; 559 pp1->y = 0; 560 561 /* pp2 = pp1 + aw */ 562 pp2 = pp1 + 1; 563 pp2->x = pp1->x + load->advance; 564 pp2->y = 0; 565 566 outline->tags[n_points ] = 0; 567 outline->tags[n_points + 1] = 0; 568 } 569 570 /* Note that we return two more points that are not */ 571 /* part of the glyph outline. */ 572 573 n_points += 2; 574 575 /* set up zone for hinting */ 576 tt_prepare_zone( zone, &gloader->current, 0, 0 ); 577 578 /* eventually scale the glyph */ 579 if ( !( load->load_flags & FT_LOAD_NO_SCALE ) ) 580 { 581 FT_Vector* vec = zone->cur; 582 FT_Vector* limit = vec + n_points; 583 FT_Fixed x_scale = load->size->metrics.x_scale; 584 FT_Fixed y_scale = load->size->metrics.y_scale; 585 586 587 /* first scale the glyph points */ 588 for ( ; vec < limit; vec++ ) 589 { 590 vec->x = FT_MulFix( vec->x, x_scale ); 591 vec->y = FT_MulFix( vec->y, y_scale ); 592 } 593 } 594 595 cur_to_org( n_points, zone ); 596 597 /* eventually hint the glyph */ 598 if ( IS_HINTED( load->load_flags ) ) 599 { 600 FT_Pos x = zone->org[n_points-2].x; 601 602 603 x = ( ( x + 32 ) & -64 ) - x; 604 translate_array( n_points, zone->org, x, 0 ); 605 606 org_to_cur( n_points, zone ); 607 608 zone->cur[n_points - 1].x = ( zone->cur[n_points - 1].x + 32 ) & -64; 609 610#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 611 612 /* now consider hinting */ 613 if ( n_ins > 0 ) 614 { 615 error = TT_Set_CodeRange( load->exec, tt_coderange_glyph, 616 load->exec->glyphIns, n_ins ); 617 if ( error ) 618 goto Exit; 619 620 load->exec->is_composite = FALSE; 621 load->exec->pedantic_hinting = (FT_Bool)( load->load_flags & 622 FT_LOAD_PEDANTIC ); 623 load->exec->pts = *zone; 624 load->exec->pts.n_points += 2; 625 626 error = TT_Run_Context( load->exec, debug ); 627 if ( error && load->exec->pedantic_hinting ) 628 goto Exit; 629 630 error = TT_Err_Ok; /* ignore bytecode errors in non-pedantic mode */ 631 } 632 633#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ 634 635 } 636 637 /* save glyph phantom points */ 638 if ( !load->preserve_pps ) 639 { 640 load->pp1 = zone->cur[n_points - 2]; 641 load->pp2 = zone->cur[n_points - 1]; 642 } 643 644#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 645 Exit: 646#endif 647 return error; 648 } 649 650 651 /*************************************************************************/ 652 /* */ 653 /* <Function> */ 654 /* load_truetype_glyph */ 655 /* */ 656 /* <Description> */ 657 /* Loads a given truetype glyph. Handles composites and uses a */ 658 /* TT_Loader object. */ 659 /* */ 660 static FT_Error 661 load_truetype_glyph( TT_Loader* loader, 662 FT_UInt glyph_index ) 663 { 664 665#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 666 FT_Stream stream = loader->stream; 667#endif 668 669 FT_Error error; 670 TT_Face face = (TT_Face)loader->face; 671 FT_ULong offset; 672 FT_Int contours_count; 673 FT_UInt index, num_points, count; 674 FT_Fixed x_scale, y_scale; 675 FT_GlyphLoader* gloader = loader->gloader; 676 FT_Bool opened_frame = 0; 677 678 679 /* check glyph index */ 680 index = glyph_index; 681 if ( index >= (FT_UInt)face->root.num_glyphs ) 682 { 683 error = TT_Err_Invalid_Glyph_Index; 684 goto Exit; 685 } 686 687 loader->glyph_index = glyph_index; 688 num_points = 0; 689 690 x_scale = 0x10000L; 691 y_scale = 0x10000L; 692 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 ) 693 { 694 x_scale = loader->size->metrics.x_scale; 695 y_scale = loader->size->metrics.y_scale; 696 } 697 698 /* get horizontal metrics */ 699 { 700 FT_Short left_bearing; 701 FT_UShort advance_width; 702 703 704 Get_HMetrics( face, index, 705 (FT_Bool)!(loader->load_flags & 706 FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH), 707 &left_bearing, 708 &advance_width ); 709 710 loader->left_bearing = left_bearing; 711 loader->advance = advance_width; 712 713 if ( !loader->linear_def ) 714 { 715 loader->linear_def = 1; 716 loader->linear = advance_width; 717 } 718 } 719 720 offset = face->glyph_locations[index]; 721 count = 0; 722 723 if ( index < (FT_UInt)face->num_locations - 1 ) 724 count = face->glyph_locations[index + 1] - offset; 725 726 if ( count == 0 ) 727 { 728 /* as described by Frederic Loyer, these are spaces, and */ 729 /* not the unknown glyph. */ 730 loader->bbox.xMin = 0; 731 loader->bbox.xMax = 0; 732 loader->bbox.yMin = 0; 733 loader->bbox.yMax = 0; 734 735 loader->pp1.x = 0; 736 loader->pp2.x = loader->advance; 737 738 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 ) 739 loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale ); 740 741#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 742 743 if ( loader->exec ) 744 loader->exec->glyphSize = 0; 745 746#endif 747 748 error = TT_Err_Ok; 749 goto Exit; 750 } 751 752 /* temporary hack */ 753#if 1 754 if ( count < 10 ) 755 { 756 /* This glyph is corrupted -- it does not have a complete header */ 757 error = TT_Err_Invalid_Outline; 758 goto Fail; 759 } 760#endif 761 762 offset = loader->glyf_offset + offset; 763 764 /* access glyph frame */ 765 error = face->access_glyph_frame( loader, glyph_index, offset, count ); 766 if ( error ) 767 goto Exit; 768 769 opened_frame = 1; 770 771 /* read first glyph header */ 772 error = face->read_glyph_header( loader ); 773 if ( error ) 774 goto Fail; 775 776 contours_count = loader->n_contours; 777 778 count -= 10; 779 780 loader->pp1.x = loader->bbox.xMin - loader->left_bearing; 781 loader->pp1.y = 0; 782 loader->pp2.x = loader->pp1.x + loader->advance; 783 loader->pp2.y = 0; 784 785 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 ) 786 { 787 loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale ); 788 loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale ); 789 } 790 791 /***********************************************************************/ 792 /***********************************************************************/ 793 /***********************************************************************/ 794 795 /* if it is a simple glyph, load it */ 796 797 if ( contours_count >= 0 ) 798 { 799 /* check that we can add the contours to the glyph */ 800 error = FT_GlyphLoader_Check_Points( gloader, 0, contours_count ); 801 if ( error ) 802 goto Fail; 803 804 error = face->read_simple_glyph( loader ); 805 if ( error ) 806 goto Fail; 807 808#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 809 810 { 811 TT_Size size = (TT_Size)loader->size; 812 813 814 error = TT_Process_Simple_Glyph( loader, 815 (FT_Bool)( size && size->debug ) ); 816 } 817 818#else 819 820 error = TT_Process_Simple_Glyph( loader, 0 ); 821 822#endif 823 824 if ( error ) 825 goto Fail; 826 827 FT_GlyphLoader_Add( gloader ); 828 829 /* Note: We could have put the simple loader source there */ 830 /* but the code is fat enough already :-) */ 831 } 832 833 /***********************************************************************/ 834 /***********************************************************************/ 835 /***********************************************************************/ 836 837 /* otherwise, load a composite! */ 838 else 839 { 840 TT_GlyphSlot glyph = (TT_GlyphSlot)loader->glyph; 841 FT_UInt start_point, start_contour; 842 FT_ULong ins_pos; /* position of composite instructions, if any */ 843 844 845 /* for each subglyph, read composite header */ 846 start_point = gloader->base.outline.n_points; 847 start_contour = gloader->base.outline.n_contours; 848 849 error = face->read_composite_glyph( loader ); 850 if ( error ) 851 goto Fail; 852 853 ins_pos = loader->ins_pos; 854 face->forget_glyph_frame( loader ); 855 opened_frame = 0; 856 857 /* if the flag FT_LOAD_NO_RECURSE is set, we return the subglyph */ 858 /* `as is' in the glyph slot (the client application will be */ 859 /* responsible for interpreting this data)... */ 860 /* */ 861 if ( loader->load_flags & FT_LOAD_NO_RECURSE ) 862 { 863 /* set up remaining glyph fields */ 864 FT_GlyphLoader_Add( gloader ); 865 866 glyph->num_subglyphs = gloader->base.num_subglyphs; 867 glyph->format = ft_glyph_format_composite; 868 glyph->subglyphs = gloader->base.subglyphs; 869 870 goto Exit; 871 } 872 873 /*********************************************************************/ 874 /*********************************************************************/ 875 /*********************************************************************/ 876 877 /* Now, read each subglyph independently. */ 878 { 879 FT_Int n, num_base_points, num_new_points; 880 FT_SubGlyph* subglyph = 0; 881 882 FT_UInt num_subglyphs = gloader->current.num_subglyphs; 883 FT_UInt num_base_subgs = gloader->base.num_subglyphs; 884 885 886 FT_GlyphLoader_Add( gloader ); 887 888 for ( n = 0; n < (FT_Int)num_subglyphs; n++ ) 889 { 890 FT_Vector pp1, pp2; 891 FT_Pos x, y; 892 893 894 /* Each time we call load_truetype_glyph in this loop, the */ 895 /* value of `gloader.base.subglyphs' can change due to table */ 896 /* reallocations. We thus need to recompute the subglyph */ 897 /* pointer on each iteration. */ 898 subglyph = gloader->base.subglyphs + num_base_subgs + n; 899 900 pp1 = loader->pp1; 901 pp2 = loader->pp2; 902 903 num_base_points = gloader->base.outline.n_points; 904 905 error = load_truetype_glyph( loader, subglyph->index ); 906 if ( error ) 907 goto Fail; 908 909 /* restore subglyph pointer */ 910 subglyph = gloader->base.subglyphs + num_base_subgs + n; 911 912 if ( subglyph->flags & USE_MY_METRICS ) 913 { 914 pp1 = loader->pp1; 915 pp2 = loader->pp2; 916 } 917 else 918 { 919 loader->pp1 = pp1; 920 loader->pp2 = pp2; 921 } 922 923 num_points = gloader->base.outline.n_points; 924 925 num_new_points = num_points - num_base_points; 926 927 /* now perform the transform required for this subglyph */ 928 929 if ( subglyph->flags & ( WE_HAVE_A_SCALE | 930 WE_HAVE_AN_XY_SCALE | 931 WE_HAVE_A_2X2 ) ) 932 { 933 FT_Vector* cur = gloader->base.outline.points + 934 num_base_points; 935 FT_Vector* org = gloader->base.extra_points + 936 num_base_points; 937 FT_Vector* limit = cur + num_new_points; 938 939 940 for ( ; cur < limit; cur++, org++ ) 941 { 942 FT_Vector_Transform( cur, &subglyph->transform ); 943 FT_Vector_Transform( org, &subglyph->transform ); 944 } 945 } 946 947 /* apply offset */ 948 949 if ( !( subglyph->flags & ARGS_ARE_XY_VALUES ) ) 950 { 951 FT_UInt k = subglyph->arg1; 952 FT_UInt l = subglyph->arg2; 953 FT_Vector* p1; 954 FT_Vector* p2; 955 956 957 if ( start_point + k >= (FT_UInt)num_base_points || 958 l >= (FT_UInt)num_new_points ) 959 { 960 error = TT_Err_Invalid_Composite; 961 goto Fail; 962 } 963 964 l += num_base_points; 965 966 p1 = gloader->base.outline.points + start_point + k; 967 p2 = gloader->base.outline.points + start_point + l; 968 969 x = p1->x - p2->x; 970 y = p1->y - p2->y; 971 } 972 else 973 { 974 x = subglyph->arg1; 975 y = subglyph->arg2; 976 977 if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) ) 978 { 979 x = FT_MulFix( x, x_scale ); 980 y = FT_MulFix( y, y_scale ); 981 982 if ( subglyph->flags & ROUND_XY_TO_GRID ) 983 { 984 x = ( x + 32 ) & -64; 985 y = ( y + 32 ) & -64; 986 } 987 } 988 } 989 990 if ( x | y ) 991 { 992 translate_array( num_new_points, 993 gloader->base.outline.points + num_base_points, 994 x, y ); 995 996 translate_array( num_new_points, 997 gloader->base.extra_points + num_base_points, 998 x, y ); 999 } 1000 } 1001 1002 /*******************************************************************/ 1003 /*******************************************************************/ 1004 /*******************************************************************/ 1005 1006 /* we have finished loading all sub-glyphs; now, look for */ 1007 /* instructions for this composite! */ 1008 1009#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 1010 1011 if ( num_subglyphs > 0 && 1012 loader->exec && 1013 ins_pos > 0 && 1014 subglyph->flags & WE_HAVE_INSTR ) 1015 { 1016 FT_UShort n_ins; 1017 TT_ExecContext exec = loader->exec; 1018 TT_GlyphZone* pts; 1019 FT_Vector* pp1; 1020 1021 1022 /* read size of instructions */ 1023 if ( FILE_Seek( ins_pos ) || 1024 READ_UShort( n_ins ) ) 1025 goto Fail; 1026 FT_TRACE5(( " Instructions size = %d\n", n_ins )); 1027 1028 /* in some fonts? */ 1029 if ( n_ins == 0xFFFF ) 1030 n_ins = 0; 1031 1032 /* check it */ 1033 if ( n_ins > face->max_profile.maxSizeOfInstructions ) 1034 { 1035 FT_TRACE0(( "Too many instructions (%d) in composite glyph %ld\n", 1036 n_ins, subglyph->index )); 1037 return TT_Err_Too_Many_Hints; 1038 } 1039 1040 /* read the instructions */ 1041 if ( FILE_Read( exec->glyphIns, n_ins ) ) 1042 goto Fail; 1043 1044 glyph->control_data = exec->glyphIns; 1045 glyph->control_len = n_ins; 1046 1047 error = TT_Set_CodeRange( exec, 1048 tt_coderange_glyph, 1049 exec->glyphIns, 1050 n_ins ); 1051 if ( error ) 1052 goto Fail; 1053 1054 /* prepare the execution context */ 1055 tt_prepare_zone( &exec->pts, &gloader->base, 1056 start_point, start_contour ); 1057 pts = &exec->pts; 1058 1059 pts->n_points = (short)(num_points + 2); 1060 pts->n_contours = gloader->base.outline.n_contours; 1061 1062 /* add phantom points */ 1063 pp1 = pts->cur + num_points; 1064 pp1[0] = loader->pp1; 1065 pp1[1] = loader->pp2; 1066 1067 pts->tags[num_points ] = 0; 1068 pts->tags[num_points + 1] = 0; 1069 1070 /* if hinting, round the phantom points */ 1071 if ( IS_HINTED( loader->load_flags ) ) 1072 { 1073 pp1[0].x = ( ( loader->pp1.x + 32 ) & -64 ); 1074 pp1[1].x = ( ( loader->pp2.x + 32 ) & -64 ); 1075 } 1076 1077 { 1078 FT_UInt k; 1079 1080 1081 for ( k = 0; k < num_points; k++ ) 1082 pts->tags[k] &= FT_Curve_Tag_On; 1083 } 1084 1085 cur_to_org( num_points + 2, pts ); 1086 1087 /* now consider hinting */ 1088 if ( IS_HINTED( loader->load_flags ) && n_ins > 0 ) 1089 { 1090 exec->is_composite = TRUE; 1091 exec->pedantic_hinting = 1092 (FT_Bool)( loader->load_flags & FT_LOAD_PEDANTIC ); 1093 1094 error = TT_Run_Context( exec, ((TT_Size)loader->size)->debug ); 1095 if ( error && exec->pedantic_hinting ) 1096 goto Fail; 1097 } 1098 1099 /* save glyph origin and advance points */ 1100 loader->pp1 = pp1[0]; 1101 loader->pp2 = pp1[1]; 1102 } 1103 1104#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ 1105 1106 } 1107 /* end of composite loading */ 1108 } 1109 1110 /***********************************************************************/ 1111 /***********************************************************************/ 1112 /***********************************************************************/ 1113 1114 Fail: 1115 if ( opened_frame ) 1116 face->forget_glyph_frame( loader ); 1117 1118 Exit: 1119 return error; 1120 } 1121 1122 1123 static void 1124 compute_glyph_metrics( TT_Loader* loader, 1125 FT_UInt glyph_index ) 1126 { 1127 FT_BBox bbox; 1128 TT_Face face = (TT_Face)loader->face; 1129 FT_Fixed y_scale; 1130 TT_GlyphSlot glyph = loader->glyph; 1131 TT_Size size = (TT_Size)loader->size; 1132 1133 1134 y_scale = 0x10000L; 1135 if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 ) 1136 y_scale = size->root.metrics.y_scale; 1137 1138 if ( glyph->format != ft_glyph_format_composite ) 1139 { 1140 glyph->outline.flags &= ~ft_outline_single_pass; 1141 1142 /* copy outline to our glyph slot */ 1143 FT_GlyphLoader_Copy_Points( glyph->internal->loader, loader->gloader ); 1144 glyph->outline = glyph->internal->loader->base.outline; 1145 1146 /* translate array so that (0,0) is the glyph's origin */ 1147 FT_Outline_Translate( &glyph->outline, -loader->pp1.x, 0 ); 1148 1149 FT_Outline_Get_CBox( &glyph->outline, &bbox ); 1150 1151 if ( IS_HINTED( loader->load_flags ) ) 1152 { 1153 /* grid-fit the bounding box */ 1154 bbox.xMin &= -64; 1155 bbox.yMin &= -64; 1156 bbox.xMax = ( bbox.xMax + 63 ) & -64; 1157 bbox.yMax = ( bbox.yMax + 63 ) & -64; 1158 } 1159 } 1160 else 1161 bbox = loader->bbox; 1162 1163 /* get the device-independent horizontal advance. It is scaled later */ 1164 /* by the base layer. */ 1165 { 1166 FT_Pos advance = loader->linear; 1167 1168 1169 /* the flag FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH was introduced to */ 1170 /* correctly support DynaLab fonts, which have an incorrect */ 1171 /* `advance_Width_Max' field! It is used, to my knowledge, */ 1172 /* exclusively in the X-TrueType font server. */ 1173 /* */ 1174 if ( face->postscript.isFixedPitch && 1175 ( loader->load_flags & FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ) == 0 ) 1176 advance = face->horizontal.advance_Width_Max; 1177 1178 /* we need to return the advance in font units in linearHoriAdvance, */ 1179 /* it will be scaled later by the base layer. */ 1180 glyph->linearHoriAdvance = advance; 1181 } 1182 1183 glyph->metrics.horiBearingX = bbox.xMin; 1184 glyph->metrics.horiBearingY = bbox.yMax; 1185 glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x; 1186 1187 /* don't forget to hint the advance when we need to */ 1188 if ( IS_HINTED( loader->load_flags ) ) 1189 glyph->metrics.horiAdvance = ( glyph->metrics.horiAdvance + 32 ) & -64; 1190 1191 /* Now take care of vertical metrics. In the case where there is */ 1192 /* no vertical information within the font (relatively common), make */ 1193 /* up some metrics by `hand'... */ 1194 1195 { 1196 FT_Short top_bearing; /* vertical top side bearing (EM units) */ 1197 FT_UShort advance_height; /* vertical advance height (EM units) */ 1198 1199 FT_Pos left; /* scaled vertical left side bearing */ 1200 FT_Pos top; /* scaled vertical top side bearing */ 1201 FT_Pos advance; /* scaled vertical advance height */ 1202 1203 1204 /* Get the unscaled `tsb' and `ah' */ 1205 if ( face->vertical_info && 1206 face->vertical.number_Of_VMetrics > 0 ) 1207 { 1208 /* Don't assume that both the vertical header and vertical */ 1209 /* metrics are present in the same font :-) */ 1210 1211 TT_Get_Metrics( (TT_HoriHeader*)&face->vertical, 1212 glyph_index, 1213 &top_bearing, 1214 &advance_height ); 1215 } 1216 else 1217 { 1218 /* Make up the distances from the horizontal header. */ 1219 1220 /* NOTE: The OS/2 values are the only `portable' ones, */ 1221 /* which is why we use them, if there is an OS/2 */ 1222 /* table in the font. Otherwise, we use the */ 1223 /* values defined in the horizontal header. */ 1224 /* */ 1225 /* NOTE2: The sTypoDescender is negative, which is why */ 1226 /* we compute the baseline-to-baseline distance */ 1227 /* here with: */ 1228 /* ascender - descender + linegap */ 1229 /* */ 1230 if ( face->os2.version != 0xFFFF ) 1231 { 1232 top_bearing = (FT_Short)( face->os2.sTypoLineGap / 2 ); 1233 advance_height = (FT_UShort)( face->os2.sTypoAscender - 1234 face->os2.sTypoDescender + 1235 face->os2.sTypoLineGap ); 1236 } 1237 else 1238 { 1239 top_bearing = (FT_Short)( face->horizontal.Line_Gap / 2 ); 1240 advance_height = (FT_UShort)( face->horizontal.Ascender + 1241 face->horizontal.Descender + 1242 face->horizontal.Line_Gap ); 1243 } 1244 } 1245 1246 /* We must adjust the top_bearing value from the bounding box given */ 1247 /* in the glyph header to te bounding box calculated with */ 1248 /* FT_Get_Outline_CBox(). */ 1249 1250 /* scale the metrics */ 1251 if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) ) 1252 { 1253 top = FT_MulFix( top_bearing + loader->bbox.yMax, y_scale ) 1254 - bbox.yMax; 1255 advance = FT_MulFix( advance_height, y_scale ); 1256 } 1257 else 1258 { 1259 top = top_bearing + loader->bbox.yMax - bbox.yMax; 1260 advance = advance_height; 1261 } 1262 1263 /* set the advance height in design units. It is scaled later by */ 1264 /* the base layer. */ 1265 glyph->linearVertAdvance = advance_height; 1266 1267 /* XXX: for now, we have no better algorithm for the lsb, but it */ 1268 /* should work fine. */ 1269 /* */ 1270 left = ( bbox.xMin - bbox.xMax ) / 2; 1271 1272 /* grid-fit them if necessary */ 1273 if ( IS_HINTED( loader->load_flags ) ) 1274 { 1275 left &= -64; 1276 top = ( top + 63 ) & -64; 1277 advance = ( advance + 32 ) & -64; 1278 } 1279 1280 glyph->metrics.vertBearingX = left; 1281 glyph->metrics.vertBearingY = top; 1282 glyph->metrics.vertAdvance = advance; 1283 } 1284 1285 /* adjust advance width to the value contained in the hdmx table */ 1286 if ( !face->postscript.isFixedPitch && size && 1287 IS_HINTED( loader->load_flags ) ) 1288 { 1289 FT_Byte* widths = Get_Advance_Widths( face, 1290 size->root.metrics.x_ppem ); 1291 1292 1293 if ( widths ) 1294 glyph->metrics.horiAdvance = widths[glyph_index] << 6; 1295 } 1296 1297 /* set glyph dimensions */ 1298 glyph->metrics.width = bbox.xMax - bbox.xMin; 1299 glyph->metrics.height = bbox.yMax - bbox.yMin; 1300 } 1301 1302 1303 /*************************************************************************/ 1304 /* */ 1305 /* <Function> */ 1306 /* TT_Load_Glyph */ 1307 /* */ 1308 /* <Description> */ 1309 /* A function used to load a single glyph within a given glyph slot, */ 1310 /* for a given size. */ 1311 /* */ 1312 /* <Input> */ 1313 /* glyph :: A handle to a target slot object where the glyph */ 1314 /* will be loaded. */ 1315 /* */ 1316 /* size :: A handle to the source face size at which the glyph */ 1317 /* must be scaled/loaded. */ 1318 /* */ 1319 /* glyph_index :: The index of the glyph in the font file. */ 1320 /* */ 1321 /* load_flags :: A flag indicating what to load for this glyph. The */ 1322 /* FT_LOAD_XXX constants can be used to control the */ 1323 /* glyph loading process (e.g., whether the outline */ 1324 /* should be scaled, whether to load bitmaps or not, */ 1325 /* whether to hint the outline, etc). */ 1326 /* */ 1327 /* <Return> */ 1328 /* FreeType error code. 0 means success. */ 1329 /* */ 1330 FT_LOCAL_DEF FT_Error 1331 TT_Load_Glyph( TT_Size size, 1332 TT_GlyphSlot glyph, 1333 FT_UShort glyph_index, 1334 FT_UInt load_flags ) 1335 { 1336 SFNT_Interface* sfnt; 1337 TT_Face face; 1338 FT_Stream stream; 1339 FT_Error error; 1340 TT_Loader loader; 1341 1342 1343 face = (TT_Face)glyph->face; 1344 sfnt = (SFNT_Interface*)face->sfnt; 1345 stream = face->root.stream; 1346 error = 0; 1347 1348 if ( !size || ( load_flags & FT_LOAD_NO_SCALE ) || 1349 ( load_flags & FT_LOAD_NO_RECURSE ) ) 1350 { 1351 size = NULL; 1352 load_flags |= FT_LOAD_NO_SCALE | 1353 FT_LOAD_NO_HINTING | 1354 FT_LOAD_NO_BITMAP; 1355 } 1356 1357 glyph->num_subglyphs = 0; 1358 1359#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS 1360 1361 /* try to load embedded bitmap if any */ 1362 /* */ 1363 /* XXX: The convention should be emphasized in */ 1364 /* the documents because it can be confusing. */ 1365 if ( size && 1366 size->strike_index != 0xFFFF && 1367 sfnt->load_sbits && 1368 ( load_flags & FT_LOAD_NO_BITMAP ) == 0 ) 1369 1370 { 1371 TT_SBit_Metrics metrics; 1372 1373 1374 error = sfnt->load_sbit_image( face, 1375 size->strike_index, 1376 glyph_index, 1377 load_flags, 1378 stream, 1379 &glyph->bitmap, 1380 &metrics ); 1381 if ( !error ) 1382 { 1383 glyph->outline.n_points = 0; 1384 glyph->outline.n_contours = 0; 1385 1386 glyph->metrics.width = (FT_Pos)metrics.width << 6; 1387 glyph->metrics.height = (FT_Pos)metrics.height << 6; 1388 1389 glyph->metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6; 1390 glyph->metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6; 1391 glyph->metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6; 1392 1393 glyph->metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6; 1394 glyph->metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6; 1395 glyph->metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6; 1396 1397 glyph->format = ft_glyph_format_bitmap; 1398 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) 1399 { 1400 glyph->bitmap_left = metrics.vertBearingX; 1401 glyph->bitmap_top = metrics.vertBearingY; 1402 } 1403 else 1404 { 1405 glyph->bitmap_left = metrics.horiBearingX; 1406 glyph->bitmap_top = metrics.horiBearingY; 1407 } 1408 return error; 1409 } 1410 } 1411 1412#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ 1413 1414 /* return immediately if we only wanted the embedded bitmaps */ 1415 if ( load_flags & FT_LOAD_SBITS_ONLY ) 1416 return FT_Err_Invalid_Argument; 1417 1418 /* seek to the beginning of the glyph table. For Type 42 fonts */ 1419 /* the table might be accessed from a Postscript stream or something */ 1420 /* else... */ 1421 1422 error = face->goto_table( face, TTAG_glyf, stream, 0 ); 1423 if ( error ) 1424 { 1425 FT_ERROR(( "TT_Load_Glyph: could not access glyph table\n" )); 1426 goto Exit; 1427 } 1428 1429 MEM_Set( &loader, 0, sizeof ( loader ) ); 1430 1431 /* update the glyph zone bounds */ 1432 { 1433 FT_GlyphLoader* gloader = FT_FACE_DRIVER(face)->glyph_loader; 1434 1435 1436 loader.gloader = gloader; 1437 1438 FT_GlyphLoader_Rewind( gloader ); 1439 1440 tt_prepare_zone( &loader.zone, &gloader->base, 0, 0 ); 1441 tt_prepare_zone( &loader.base, &gloader->base, 0, 0 ); 1442 } 1443 1444#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 1445 1446 if ( size ) 1447 { 1448 /* query new execution context */ 1449 loader.exec = size->debug ? size->context : TT_New_Context( face ); 1450 if ( !loader.exec ) 1451 return TT_Err_Could_Not_Find_Context; 1452 1453 TT_Load_Context( loader.exec, face, size ); 1454 loader.instructions = loader.exec->glyphIns; 1455 1456 /* load default graphics state - if needed */ 1457 if ( size->GS.instruct_control & 2 ) 1458 loader.exec->GS = tt_default_graphics_state; 1459 } 1460 1461#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ 1462 1463 /* clear all outline flags, except the `owner' one */ 1464 glyph->outline.flags = 0; 1465 1466 if ( size && size->root.metrics.y_ppem < 24 ) 1467 glyph->outline.flags |= ft_outline_high_precision; 1468 1469 /* let's initialize the rest of our loader now */ 1470 1471 loader.load_flags = load_flags; 1472 1473 loader.face = (FT_Face)face; 1474 loader.size = (FT_Size)size; 1475 loader.glyph = (FT_GlyphSlot)glyph; 1476 loader.stream = stream; 1477 1478 loader.glyf_offset = FILE_Pos(); 1479 1480#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 1481 1482 /* if the cvt program has disabled hinting, the argument */ 1483 /* is ignored. */ 1484 if ( size && ( size->GS.instruct_control & 1 ) ) 1485 loader.load_flags |= FT_LOAD_NO_HINTING; 1486 1487#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ 1488 1489 /* Main loading loop */ 1490 glyph->format = ft_glyph_format_outline; 1491 glyph->num_subglyphs = 0; 1492 error = load_truetype_glyph( &loader, glyph_index ); 1493 if ( !error ) 1494 compute_glyph_metrics( &loader, glyph_index ); 1495 1496#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER 1497 1498 if ( !size || !size->debug ) 1499 TT_Done_Context( loader.exec ); 1500 1501#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ 1502 1503 Exit: 1504 return error; 1505 } 1506 1507 1508/* END */ 1509