1/***************************************************************************/ 2/* */ 3/* tttypes.h */ 4/* */ 5/* Basic SFNT/TrueType type definitions and interface (specification */ 6/* only). */ 7/* */ 8/* Copyright 1996-2001, 2002, 2004, 2005, 2006, 2007, 2008 by */ 9/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 10/* */ 11/* This file is part of the FreeType project, and may only be used, */ 12/* modified, and distributed under the terms of the FreeType project */ 13/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 14/* this file you indicate that you have read the license and */ 15/* understand and accept it fully. */ 16/* */ 17/***************************************************************************/ 18 19 20#ifndef __TTTYPES_H__ 21#define __TTTYPES_H__ 22 23 24#include <ft2build.h> 25#include FT_TRUETYPE_TABLES_H 26#include FT_INTERNAL_OBJECTS_H 27 28#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 29#include FT_MULTIPLE_MASTERS_H 30#endif 31 32 33FT_BEGIN_HEADER 34 35 36 /*************************************************************************/ 37 /*************************************************************************/ 38 /*************************************************************************/ 39 /*** ***/ 40 /*** ***/ 41 /*** REQUIRED TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ 42 /*** ***/ 43 /*** ***/ 44 /*************************************************************************/ 45 /*************************************************************************/ 46 /*************************************************************************/ 47 48 49 /*************************************************************************/ 50 /* */ 51 /* <Struct> */ 52 /* TTC_HeaderRec */ 53 /* */ 54 /* <Description> */ 55 /* TrueType collection header. This table contains the offsets of */ 56 /* the font headers of each distinct TrueType face in the file. */ 57 /* */ 58 /* <Fields> */ 59 /* tag :: Must be `ttc ' to indicate a TrueType collection. */ 60 /* */ 61 /* version :: The version number. */ 62 /* */ 63 /* count :: The number of faces in the collection. The */ 64 /* specification says this should be an unsigned long, but */ 65 /* we use a signed long since we need the value -1 for */ 66 /* specific purposes. */ 67 /* */ 68 /* offsets :: The offsets of the font headers, one per face. */ 69 /* */ 70 typedef struct TTC_HeaderRec_ 71 { 72 FT_ULong tag; 73 FT_Fixed version; 74 FT_Long count; 75 FT_ULong* offsets; 76 77 } TTC_HeaderRec; 78 79 80 /*************************************************************************/ 81 /* */ 82 /* <Struct> */ 83 /* SFNT_HeaderRec */ 84 /* */ 85 /* <Description> */ 86 /* SFNT file format header. */ 87 /* */ 88 /* <Fields> */ 89 /* format_tag :: The font format tag. */ 90 /* */ 91 /* num_tables :: The number of tables in file. */ 92 /* */ 93 /* search_range :: Must be `16 * (max power of 2 <= num_tables)'. */ 94 /* */ 95 /* entry_selector :: Must be log2 of `search_range / 16'. */ 96 /* */ 97 /* range_shift :: Must be `num_tables * 16 - search_range'. */ 98 /* */ 99 typedef struct SFNT_HeaderRec_ 100 { 101 FT_ULong format_tag; 102 FT_UShort num_tables; 103 FT_UShort search_range; 104 FT_UShort entry_selector; 105 FT_UShort range_shift; 106 107 FT_ULong offset; /* not in file */ 108 109 } SFNT_HeaderRec, *SFNT_Header; 110 111 112 /*************************************************************************/ 113 /* */ 114 /* <Struct> */ 115 /* TT_TableRec */ 116 /* */ 117 /* <Description> */ 118 /* This structure describes a given table of a TrueType font. */ 119 /* */ 120 /* <Fields> */ 121 /* Tag :: A four-bytes tag describing the table. */ 122 /* */ 123 /* CheckSum :: The table checksum. This value can be ignored. */ 124 /* */ 125 /* Offset :: The offset of the table from the start of the TrueType */ 126 /* font in its resource. */ 127 /* */ 128 /* Length :: The table length (in bytes). */ 129 /* */ 130 typedef struct TT_TableRec_ 131 { 132 FT_ULong Tag; /* table type */ 133 FT_ULong CheckSum; /* table checksum */ 134 FT_ULong Offset; /* table file offset */ 135 FT_ULong Length; /* table length */ 136 137 } TT_TableRec, *TT_Table; 138 139 140 /*************************************************************************/ 141 /* */ 142 /* <Struct> */ 143 /* TT_LongMetricsRec */ 144 /* */ 145 /* <Description> */ 146 /* A structure modeling the long metrics of the `hmtx' and `vmtx' */ 147 /* TrueType tables. The values are expressed in font units. */ 148 /* */ 149 /* <Fields> */ 150 /* advance :: The advance width or height for the glyph. */ 151 /* */ 152 /* bearing :: The left-side or top-side bearing for the glyph. */ 153 /* */ 154 typedef struct TT_LongMetricsRec_ 155 { 156 FT_UShort advance; 157 FT_Short bearing; 158 159 } TT_LongMetricsRec, *TT_LongMetrics; 160 161 162 /*************************************************************************/ 163 /* */ 164 /* <Type> */ 165 /* TT_ShortMetrics */ 166 /* */ 167 /* <Description> */ 168 /* A simple type to model the short metrics of the `hmtx' and `vmtx' */ 169 /* tables. */ 170 /* */ 171 typedef FT_Short TT_ShortMetrics; 172 173 174 /*************************************************************************/ 175 /* */ 176 /* <Struct> */ 177 /* TT_NameEntryRec */ 178 /* */ 179 /* <Description> */ 180 /* A structure modeling TrueType name records. Name records are used */ 181 /* to store important strings like family name, style name, */ 182 /* copyright, etc. in _localized_ versions (i.e., language, encoding, */ 183 /* etc). */ 184 /* */ 185 /* <Fields> */ 186 /* platformID :: The ID of the name's encoding platform. */ 187 /* */ 188 /* encodingID :: The platform-specific ID for the name's encoding. */ 189 /* */ 190 /* languageID :: The platform-specific ID for the name's language. */ 191 /* */ 192 /* nameID :: The ID specifying what kind of name this is. */ 193 /* */ 194 /* stringLength :: The length of the string in bytes. */ 195 /* */ 196 /* stringOffset :: The offset to the string in the `name' table. */ 197 /* */ 198 /* string :: A pointer to the string's bytes. Note that these */ 199 /* are usually UTF-16 encoded characters. */ 200 /* */ 201 typedef struct TT_NameEntryRec_ 202 { 203 FT_UShort platformID; 204 FT_UShort encodingID; 205 FT_UShort languageID; 206 FT_UShort nameID; 207 FT_UShort stringLength; 208 FT_ULong stringOffset; 209 210 /* this last field is not defined in the spec */ 211 /* but used by the FreeType engine */ 212 213 FT_Byte* string; 214 215 } TT_NameEntryRec, *TT_NameEntry; 216 217 218 /*************************************************************************/ 219 /* */ 220 /* <Struct> */ 221 /* TT_NameTableRec */ 222 /* */ 223 /* <Description> */ 224 /* A structure modeling the TrueType name table. */ 225 /* */ 226 /* <Fields> */ 227 /* format :: The format of the name table. */ 228 /* */ 229 /* numNameRecords :: The number of names in table. */ 230 /* */ 231 /* storageOffset :: The offset of the name table in the `name' */ 232 /* TrueType table. */ 233 /* */ 234 /* names :: An array of name records. */ 235 /* */ 236 /* stream :: the file's input stream. */ 237 /* */ 238 typedef struct TT_NameTableRec_ 239 { 240 FT_UShort format; 241 FT_UInt numNameRecords; 242 FT_UInt storageOffset; 243 TT_NameEntryRec* names; 244 FT_Stream stream; 245 246 } TT_NameTableRec, *TT_NameTable; 247 248 249 /*************************************************************************/ 250 /*************************************************************************/ 251 /*************************************************************************/ 252 /*** ***/ 253 /*** ***/ 254 /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ 255 /*** ***/ 256 /*** ***/ 257 /*************************************************************************/ 258 /*************************************************************************/ 259 /*************************************************************************/ 260 261 262 /*************************************************************************/ 263 /* */ 264 /* <Struct> */ 265 /* TT_GaspRangeRec */ 266 /* */ 267 /* <Description> */ 268 /* A tiny structure used to model a gasp range according to the */ 269 /* TrueType specification. */ 270 /* */ 271 /* <Fields> */ 272 /* maxPPEM :: The maximum ppem value to which `gaspFlag' applies. */ 273 /* */ 274 /* gaspFlag :: A flag describing the grid-fitting and anti-aliasing */ 275 /* modes to be used. */ 276 /* */ 277 typedef struct TT_GaspRangeRec_ 278 { 279 FT_UShort maxPPEM; 280 FT_UShort gaspFlag; 281 282 } TT_GaspRangeRec, *TT_GaspRange; 283 284 285#define TT_GASP_GRIDFIT 0x01 286#define TT_GASP_DOGRAY 0x02 287 288 289 /*************************************************************************/ 290 /* */ 291 /* <Struct> */ 292 /* TT_GaspRec */ 293 /* */ 294 /* <Description> */ 295 /* A structure modeling the TrueType `gasp' table used to specify */ 296 /* grid-fitting and anti-aliasing behaviour. */ 297 /* */ 298 /* <Fields> */ 299 /* version :: The version number. */ 300 /* */ 301 /* numRanges :: The number of gasp ranges in table. */ 302 /* */ 303 /* gaspRanges :: An array of gasp ranges. */ 304 /* */ 305 typedef struct TT_Gasp_ 306 { 307 FT_UShort version; 308 FT_UShort numRanges; 309 TT_GaspRange gaspRanges; 310 311 } TT_GaspRec; 312 313 314#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 315 316 /*************************************************************************/ 317 /* */ 318 /* <Struct> */ 319 /* TT_HdmxEntryRec */ 320 /* */ 321 /* <Description> */ 322 /* A small structure used to model the pre-computed widths of a given */ 323 /* size. They are found in the `hdmx' table. */ 324 /* */ 325 /* <Fields> */ 326 /* ppem :: The pixels per EM value at which these metrics apply. */ 327 /* */ 328 /* max_width :: The maximum advance width for this metric. */ 329 /* */ 330 /* widths :: An array of widths. Note: These are 8-bit bytes. */ 331 /* */ 332 typedef struct TT_HdmxEntryRec_ 333 { 334 FT_Byte ppem; 335 FT_Byte max_width; 336 FT_Byte* widths; 337 338 } TT_HdmxEntryRec, *TT_HdmxEntry; 339 340 341 /*************************************************************************/ 342 /* */ 343 /* <Struct> */ 344 /* TT_HdmxRec */ 345 /* */ 346 /* <Description> */ 347 /* A structure used to model the `hdmx' table, which contains */ 348 /* pre-computed widths for a set of given sizes/dimensions. */ 349 /* */ 350 /* <Fields> */ 351 /* version :: The version number. */ 352 /* */ 353 /* num_records :: The number of hdmx records. */ 354 /* */ 355 /* records :: An array of hdmx records. */ 356 /* */ 357 typedef struct TT_HdmxRec_ 358 { 359 FT_UShort version; 360 FT_Short num_records; 361 TT_HdmxEntry records; 362 363 } TT_HdmxRec, *TT_Hdmx; 364 365 366 /*************************************************************************/ 367 /* */ 368 /* <Struct> */ 369 /* TT_Kern0_PairRec */ 370 /* */ 371 /* <Description> */ 372 /* A structure used to model a kerning pair for the kerning table */ 373 /* format 0. The engine now loads this table if it finds one in the */ 374 /* font file. */ 375 /* */ 376 /* <Fields> */ 377 /* left :: The index of the left glyph in pair. */ 378 /* */ 379 /* right :: The index of the right glyph in pair. */ 380 /* */ 381 /* value :: The kerning distance. A positive value spaces the */ 382 /* glyphs, a negative one makes them closer. */ 383 /* */ 384 typedef struct TT_Kern0_PairRec_ 385 { 386 FT_UShort left; /* index of left glyph in pair */ 387 FT_UShort right; /* index of right glyph in pair */ 388 FT_FWord value; /* kerning value */ 389 390 } TT_Kern0_PairRec, *TT_Kern0_Pair; 391 392#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ 393 394 395 /*************************************************************************/ 396 /*************************************************************************/ 397 /*************************************************************************/ 398 /*** ***/ 399 /*** ***/ 400 /*** EMBEDDED BITMAPS SUPPORT ***/ 401 /*** ***/ 402 /*** ***/ 403 /*************************************************************************/ 404 /*************************************************************************/ 405 /*************************************************************************/ 406 407 408 /*************************************************************************/ 409 /* */ 410 /* <Struct> */ 411 /* TT_SBit_MetricsRec */ 412 /* */ 413 /* <Description> */ 414 /* A structure used to hold the big metrics of a given glyph bitmap */ 415 /* in a TrueType or OpenType font. These are usually found in the */ 416 /* `EBDT' (Microsoft) or `bloc' (Apple) table. */ 417 /* */ 418 /* <Fields> */ 419 /* height :: The glyph height in pixels. */ 420 /* */ 421 /* width :: The glyph width in pixels. */ 422 /* */ 423 /* horiBearingX :: The horizontal left bearing. */ 424 /* */ 425 /* horiBearingY :: The horizontal top bearing. */ 426 /* */ 427 /* horiAdvance :: The horizontal advance. */ 428 /* */ 429 /* vertBearingX :: The vertical left bearing. */ 430 /* */ 431 /* vertBearingY :: The vertical top bearing. */ 432 /* */ 433 /* vertAdvance :: The vertical advance. */ 434 /* */ 435 typedef struct TT_SBit_MetricsRec_ 436 { 437 FT_Byte height; 438 FT_Byte width; 439 440 FT_Char horiBearingX; 441 FT_Char horiBearingY; 442 FT_Byte horiAdvance; 443 444 FT_Char vertBearingX; 445 FT_Char vertBearingY; 446 FT_Byte vertAdvance; 447 448 } TT_SBit_MetricsRec, *TT_SBit_Metrics; 449 450 451 /*************************************************************************/ 452 /* */ 453 /* <Struct> */ 454 /* TT_SBit_SmallMetricsRec */ 455 /* */ 456 /* <Description> */ 457 /* A structure used to hold the small metrics of a given glyph bitmap */ 458 /* in a TrueType or OpenType font. These are usually found in the */ 459 /* `EBDT' (Microsoft) or the `bdat' (Apple) table. */ 460 /* */ 461 /* <Fields> */ 462 /* height :: The glyph height in pixels. */ 463 /* */ 464 /* width :: The glyph width in pixels. */ 465 /* */ 466 /* bearingX :: The left-side bearing. */ 467 /* */ 468 /* bearingY :: The top-side bearing. */ 469 /* */ 470 /* advance :: The advance width or height. */ 471 /* */ 472 typedef struct TT_SBit_Small_Metrics_ 473 { 474 FT_Byte height; 475 FT_Byte width; 476 477 FT_Char bearingX; 478 FT_Char bearingY; 479 FT_Byte advance; 480 481 } TT_SBit_SmallMetricsRec, *TT_SBit_SmallMetrics; 482 483 484 /*************************************************************************/ 485 /* */ 486 /* <Struct> */ 487 /* TT_SBit_LineMetricsRec */ 488 /* */ 489 /* <Description> */ 490 /* A structure used to describe the text line metrics of a given */ 491 /* bitmap strike, for either a horizontal or vertical layout. */ 492 /* */ 493 /* <Fields> */ 494 /* ascender :: The ascender in pixels. */ 495 /* */ 496 /* descender :: The descender in pixels. */ 497 /* */ 498 /* max_width :: The maximum glyph width in pixels. */ 499 /* */ 500 /* caret_slope_enumerator :: Rise of the caret slope, typically set */ 501 /* to 1 for non-italic fonts. */ 502 /* */ 503 /* caret_slope_denominator :: Rise of the caret slope, typically set */ 504 /* to 0 for non-italic fonts. */ 505 /* */ 506 /* caret_offset :: Offset in pixels to move the caret for */ 507 /* proper positioning. */ 508 /* */ 509 /* min_origin_SB :: Minimum of horiBearingX (resp. */ 510 /* vertBearingY). */ 511 /* min_advance_SB :: Minimum of */ 512 /* */ 513 /* horizontal advance - */ 514 /* ( horiBearingX + width ) */ 515 /* */ 516 /* resp. */ 517 /* */ 518 /* vertical advance - */ 519 /* ( vertBearingY + height ) */ 520 /* */ 521 /* max_before_BL :: Maximum of horiBearingY (resp. */ 522 /* vertBearingY). */ 523 /* */ 524 /* min_after_BL :: Minimum of */ 525 /* */ 526 /* horiBearingY - height */ 527 /* */ 528 /* resp. */ 529 /* */ 530 /* vertBearingX - width */ 531 /* */ 532 /* pads :: Unused (to make the size of the record */ 533 /* a multiple of 32 bits. */ 534 /* */ 535 typedef struct TT_SBit_LineMetricsRec_ 536 { 537 FT_Char ascender; 538 FT_Char descender; 539 FT_Byte max_width; 540 FT_Char caret_slope_numerator; 541 FT_Char caret_slope_denominator; 542 FT_Char caret_offset; 543 FT_Char min_origin_SB; 544 FT_Char min_advance_SB; 545 FT_Char max_before_BL; 546 FT_Char min_after_BL; 547 FT_Char pads[2]; 548 549 } TT_SBit_LineMetricsRec, *TT_SBit_LineMetrics; 550 551 552 /*************************************************************************/ 553 /* */ 554 /* <Struct> */ 555 /* TT_SBit_RangeRec */ 556 /* */ 557 /* <Description> */ 558 /* A TrueType/OpenType subIndexTable as defined in the `EBLC' */ 559 /* (Microsoft) or `bloc' (Apple) tables. */ 560 /* */ 561 /* <Fields> */ 562 /* first_glyph :: The first glyph index in the range. */ 563 /* */ 564 /* last_glyph :: The last glyph index in the range. */ 565 /* */ 566 /* index_format :: The format of index table. Valid values are 1 */ 567 /* to 5. */ 568 /* */ 569 /* image_format :: The format of `EBDT' image data. */ 570 /* */ 571 /* image_offset :: The offset to image data in `EBDT'. */ 572 /* */ 573 /* image_size :: For index formats 2 and 5. This is the size in */ 574 /* bytes of each glyph bitmap. */ 575 /* */ 576 /* big_metrics :: For index formats 2 and 5. This is the big */ 577 /* metrics for each glyph bitmap. */ 578 /* */ 579 /* num_glyphs :: For index formats 4 and 5. This is the number of */ 580 /* glyphs in the code array. */ 581 /* */ 582 /* glyph_offsets :: For index formats 1 and 3. */ 583 /* */ 584 /* glyph_codes :: For index formats 4 and 5. */ 585 /* */ 586 /* table_offset :: The offset of the index table in the `EBLC' */ 587 /* table. Only used during strike loading. */ 588 /* */ 589 typedef struct TT_SBit_RangeRec_ 590 { 591 FT_UShort first_glyph; 592 FT_UShort last_glyph; 593 594 FT_UShort index_format; 595 FT_UShort image_format; 596 FT_ULong image_offset; 597 598 FT_ULong image_size; 599 TT_SBit_MetricsRec metrics; 600 FT_ULong num_glyphs; 601 602 FT_ULong* glyph_offsets; 603 FT_UShort* glyph_codes; 604 605 FT_ULong table_offset; 606 607 } TT_SBit_RangeRec, *TT_SBit_Range; 608 609 610 /*************************************************************************/ 611 /* */ 612 /* <Struct> */ 613 /* TT_SBit_StrikeRec */ 614 /* */ 615 /* <Description> */ 616 /* A structure used describe a given bitmap strike in the `EBLC' */ 617 /* (Microsoft) or `bloc' (Apple) tables. */ 618 /* */ 619 /* <Fields> */ 620 /* num_index_ranges :: The number of index ranges. */ 621 /* */ 622 /* index_ranges :: An array of glyph index ranges. */ 623 /* */ 624 /* color_ref :: Unused. `color_ref' is put in for future */ 625 /* enhancements, but these fields are already */ 626 /* in use by other platforms (e.g. Newton). */ 627 /* For details, please see */ 628 /* */ 629 /* http://fonts.apple.com/ */ 630 /* TTRefMan/RM06/Chap6bloc.html */ 631 /* */ 632 /* hori :: The line metrics for horizontal layouts. */ 633 /* */ 634 /* vert :: The line metrics for vertical layouts. */ 635 /* */ 636 /* start_glyph :: The lowest glyph index for this strike. */ 637 /* */ 638 /* end_glyph :: The highest glyph index for this strike. */ 639 /* */ 640 /* x_ppem :: The number of horizontal pixels per EM. */ 641 /* */ 642 /* y_ppem :: The number of vertical pixels per EM. */ 643 /* */ 644 /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */ 645 /* and 8. */ 646 /* */ 647 /* flags :: Is this a vertical or horizontal strike? For */ 648 /* details, please see */ 649 /* */ 650 /* http://fonts.apple.com/ */ 651 /* TTRefMan/RM06/Chap6bloc.html */ 652 /* */ 653 typedef struct TT_SBit_StrikeRec_ 654 { 655 FT_Int num_ranges; 656 TT_SBit_Range sbit_ranges; 657 FT_ULong ranges_offset; 658 659 FT_ULong color_ref; 660 661 TT_SBit_LineMetricsRec hori; 662 TT_SBit_LineMetricsRec vert; 663 664 FT_UShort start_glyph; 665 FT_UShort end_glyph; 666 667 FT_Byte x_ppem; 668 FT_Byte y_ppem; 669 670 FT_Byte bit_depth; 671 FT_Char flags; 672 673 } TT_SBit_StrikeRec, *TT_SBit_Strike; 674 675 676 /*************************************************************************/ 677 /* */ 678 /* <Struct> */ 679 /* TT_SBit_ComponentRec */ 680 /* */ 681 /* <Description> */ 682 /* A simple structure to describe a compound sbit element. */ 683 /* */ 684 /* <Fields> */ 685 /* glyph_code :: The element's glyph index. */ 686 /* */ 687 /* x_offset :: The element's left bearing. */ 688 /* */ 689 /* y_offset :: The element's top bearing. */ 690 /* */ 691 typedef struct TT_SBit_ComponentRec_ 692 { 693 FT_UShort glyph_code; 694 FT_Char x_offset; 695 FT_Char y_offset; 696 697 } TT_SBit_ComponentRec, *TT_SBit_Component; 698 699 700 /*************************************************************************/ 701 /* */ 702 /* <Struct> */ 703 /* TT_SBit_ScaleRec */ 704 /* */ 705 /* <Description> */ 706 /* A structure used describe a given bitmap scaling table, as defined */ 707 /* in the `EBSC' table. */ 708 /* */ 709 /* <Fields> */ 710 /* hori :: The horizontal line metrics. */ 711 /* */ 712 /* vert :: The vertical line metrics. */ 713 /* */ 714 /* x_ppem :: The number of horizontal pixels per EM. */ 715 /* */ 716 /* y_ppem :: The number of vertical pixels per EM. */ 717 /* */ 718 /* x_ppem_substitute :: Substitution x_ppem value. */ 719 /* */ 720 /* y_ppem_substitute :: Substitution y_ppem value. */ 721 /* */ 722 typedef struct TT_SBit_ScaleRec_ 723 { 724 TT_SBit_LineMetricsRec hori; 725 TT_SBit_LineMetricsRec vert; 726 727 FT_Byte x_ppem; 728 FT_Byte y_ppem; 729 730 FT_Byte x_ppem_substitute; 731 FT_Byte y_ppem_substitute; 732 733 } TT_SBit_ScaleRec, *TT_SBit_Scale; 734 735 736 /*************************************************************************/ 737 /*************************************************************************/ 738 /*************************************************************************/ 739 /*** ***/ 740 /*** ***/ 741 /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/ 742 /*** ***/ 743 /*** ***/ 744 /*************************************************************************/ 745 /*************************************************************************/ 746 /*************************************************************************/ 747 748 749 /*************************************************************************/ 750 /* */ 751 /* <Struct> */ 752 /* TT_Post_20Rec */ 753 /* */ 754 /* <Description> */ 755 /* Postscript names sub-table, format 2.0. Stores the PS name of */ 756 /* each glyph in the font face. */ 757 /* */ 758 /* <Fields> */ 759 /* num_glyphs :: The number of named glyphs in the table. */ 760 /* */ 761 /* num_names :: The number of PS names stored in the table. */ 762 /* */ 763 /* glyph_indices :: The indices of the glyphs in the names arrays. */ 764 /* */ 765 /* glyph_names :: The PS names not in Mac Encoding. */ 766 /* */ 767 typedef struct TT_Post_20Rec_ 768 { 769 FT_UShort num_glyphs; 770 FT_UShort num_names; 771 FT_UShort* glyph_indices; 772 FT_Char** glyph_names; 773 774 } TT_Post_20Rec, *TT_Post_20; 775 776 777 /*************************************************************************/ 778 /* */ 779 /* <Struct> */ 780 /* TT_Post_25Rec */ 781 /* */ 782 /* <Description> */ 783 /* Postscript names sub-table, format 2.5. Stores the PS name of */ 784 /* each glyph in the font face. */ 785 /* */ 786 /* <Fields> */ 787 /* num_glyphs :: The number of glyphs in the table. */ 788 /* */ 789 /* offsets :: An array of signed offsets in a normal Mac */ 790 /* Postscript name encoding. */ 791 /* */ 792 typedef struct TT_Post_25_ 793 { 794 FT_UShort num_glyphs; 795 FT_Char* offsets; 796 797 } TT_Post_25Rec, *TT_Post_25; 798 799 800 /*************************************************************************/ 801 /* */ 802 /* <Struct> */ 803 /* TT_Post_NamesRec */ 804 /* */ 805 /* <Description> */ 806 /* Postscript names table, either format 2.0 or 2.5. */ 807 /* */ 808 /* <Fields> */ 809 /* loaded :: A flag to indicate whether the PS names are loaded. */ 810 /* */ 811 /* format_20 :: The sub-table used for format 2.0. */ 812 /* */ 813 /* format_25 :: The sub-table used for format 2.5. */ 814 /* */ 815 typedef struct TT_Post_NamesRec_ 816 { 817 FT_Bool loaded; 818 819 union 820 { 821 TT_Post_20Rec format_20; 822 TT_Post_25Rec format_25; 823 824 } names; 825 826 } TT_Post_NamesRec, *TT_Post_Names; 827 828 829 /*************************************************************************/ 830 /*************************************************************************/ 831 /*************************************************************************/ 832 /*** ***/ 833 /*** ***/ 834 /*** GX VARIATION TABLE SUPPORT ***/ 835 /*** ***/ 836 /*** ***/ 837 /*************************************************************************/ 838 /*************************************************************************/ 839 /*************************************************************************/ 840 841 842#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 843 typedef struct GX_BlendRec_ *GX_Blend; 844#endif 845 846 /*************************************************************************/ 847 /*************************************************************************/ 848 /*************************************************************************/ 849 /*** ***/ 850 /*** ***/ 851 /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/ 852 /*** ***/ 853 /*** ***/ 854 /*************************************************************************/ 855 /*************************************************************************/ 856 /*************************************************************************/ 857 858 /* 859 * These types are used to support a `BDF ' table that isn't part of the 860 * official TrueType specification. It is mainly used in SFNT-based 861 * bitmap fonts that were generated from a set of BDF fonts. 862 * 863 * The format of the table is as follows. 864 * 865 * USHORT version `BDF ' table version number, should be 0x0001. 866 * USHORT strikeCount Number of strikes (bitmap sizes) in this table. 867 * ULONG stringTable Offset (from start of BDF table) to string 868 * table. 869 * 870 * This is followed by an array of `strikeCount' descriptors, having the 871 * following format. 872 * 873 * USHORT ppem Vertical pixels per EM for this strike. 874 * USHORT numItems Number of items for this strike (properties and 875 * atoms). Maximum is 255. 876 * 877 * This array in turn is followed by `strikeCount' value sets. Each 878 * `value set' is an array of `numItems' items with the following format. 879 * 880 * ULONG item_name Offset in string table to item name. 881 * USHORT item_type The item type. Possible values are 882 * 0 => string (e.g., COMMENT) 883 * 1 => atom (e.g., FONT or even SIZE) 884 * 2 => int32 885 * 3 => uint32 886 * 0x10 => A flag to indicate a properties. This 887 * is ORed with the above values. 888 * ULONG item_value For strings => Offset into string table without 889 * the corresponding double quotes. 890 * For atoms => Offset into string table. 891 * For integers => Direct value. 892 * 893 * All strings in the string table consist of bytes and are 894 * zero-terminated. 895 * 896 */ 897 898#ifdef TT_CONFIG_OPTION_BDF 899 900 typedef struct TT_BDFRec_ 901 { 902 FT_Byte* table; 903 FT_Byte* table_end; 904 FT_Byte* strings; 905 FT_ULong strings_size; 906 FT_UInt num_strikes; 907 FT_Bool loaded; 908 909 } TT_BDFRec, *TT_BDF; 910 911#endif /* TT_CONFIG_OPTION_BDF */ 912 913 /*************************************************************************/ 914 /*************************************************************************/ 915 /*************************************************************************/ 916 /*** ***/ 917 /*** ***/ 918 /*** ORIGINAL TT_FACE CLASS DEFINITION ***/ 919 /*** ***/ 920 /*** ***/ 921 /*************************************************************************/ 922 /*************************************************************************/ 923 /*************************************************************************/ 924 925 926 /*************************************************************************/ 927 /* */ 928 /* This structure/class is defined here because it is common to the */ 929 /* following formats: TTF, OpenType-TT, and OpenType-CFF. */ 930 /* */ 931 /* Note, however, that the classes TT_Size and TT_GlyphSlot are not */ 932 /* shared between font drivers, and are thus defined in `ttobjs.h'. */ 933 /* */ 934 /*************************************************************************/ 935 936 937 /*************************************************************************/ 938 /* */ 939 /* <Type> */ 940 /* TT_Face */ 941 /* */ 942 /* <Description> */ 943 /* A handle to a TrueType face/font object. A TT_Face encapsulates */ 944 /* the resolution and scaling independent parts of a TrueType font */ 945 /* resource. */ 946 /* */ 947 /* <Note> */ 948 /* The TT_Face structure is also used as a `parent class' for the */ 949 /* OpenType-CFF class (T2_Face). */ 950 /* */ 951 typedef struct TT_FaceRec_* TT_Face; 952 953 954 /* a function type used for the truetype bytecode interpreter hooks */ 955 typedef FT_Error 956 (*TT_Interpreter)( void* exec_context ); 957 958 /* forward declaration */ 959 typedef struct TT_LoaderRec_* TT_Loader; 960 961 962 /*************************************************************************/ 963 /* */ 964 /* <FuncType> */ 965 /* TT_Loader_GotoTableFunc */ 966 /* */ 967 /* <Description> */ 968 /* Seeks a stream to the start of a given TrueType table. */ 969 /* */ 970 /* <Input> */ 971 /* face :: A handle to the target face object. */ 972 /* */ 973 /* tag :: A 4-byte tag used to name the table. */ 974 /* */ 975 /* stream :: The input stream. */ 976 /* */ 977 /* <Output> */ 978 /* length :: The length of the table in bytes. Set to 0 if not */ 979 /* needed. */ 980 /* */ 981 /* <Return> */ 982 /* FreeType error code. 0 means success. */ 983 /* */ 984 /* <Note> */ 985 /* The stream cursor must be at the font file's origin. */ 986 /* */ 987 typedef FT_Error 988 (*TT_Loader_GotoTableFunc)( TT_Face face, 989 FT_ULong tag, 990 FT_Stream stream, 991 FT_ULong* length ); 992 993 994 /*************************************************************************/ 995 /* */ 996 /* <FuncType> */ 997 /* TT_Loader_StartGlyphFunc */ 998 /* */ 999 /* <Description> */ 1000 /* Seeks a stream to the start of a given glyph element, and opens a */ 1001 /* frame for it. */ 1002 /* */ 1003 /* <Input> */ 1004 /* loader :: The current TrueType glyph loader object. */ 1005 /* */ 1006 /* glyph index :: The index of the glyph to access. */ 1007 /* */ 1008 /* offset :: The offset of the glyph according to the */ 1009 /* `locations' table. */ 1010 /* */ 1011 /* byte_count :: The size of the frame in bytes. */ 1012 /* */ 1013 /* <Return> */ 1014 /* FreeType error code. 0 means success. */ 1015 /* */ 1016 /* <Note> */ 1017 /* This function is normally equivalent to FT_STREAM_SEEK(offset) */ 1018 /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */ 1019 /* but alternative formats (e.g. compressed ones) might use something */ 1020 /* different. */ 1021 /* */ 1022 typedef FT_Error 1023 (*TT_Loader_StartGlyphFunc)( TT_Loader loader, 1024 FT_UInt glyph_index, 1025 FT_ULong offset, 1026 FT_UInt byte_count ); 1027 1028 1029 /*************************************************************************/ 1030 /* */ 1031 /* <FuncType> */ 1032 /* TT_Loader_ReadGlyphFunc */ 1033 /* */ 1034 /* <Description> */ 1035 /* Reads one glyph element (its header, a simple glyph, or a */ 1036 /* composite) from the loader's current stream frame. */ 1037 /* */ 1038 /* <Input> */ 1039 /* loader :: The current TrueType glyph loader object. */ 1040 /* */ 1041 /* <Return> */ 1042 /* FreeType error code. 0 means success. */ 1043 /* */ 1044 typedef FT_Error 1045 (*TT_Loader_ReadGlyphFunc)( TT_Loader loader ); 1046 1047 1048 /*************************************************************************/ 1049 /* */ 1050 /* <FuncType> */ 1051 /* TT_Loader_EndGlyphFunc */ 1052 /* */ 1053 /* <Description> */ 1054 /* Closes the current loader stream frame for the glyph. */ 1055 /* */ 1056 /* <Input> */ 1057 /* loader :: The current TrueType glyph loader object. */ 1058 /* */ 1059 typedef void 1060 (*TT_Loader_EndGlyphFunc)( TT_Loader loader ); 1061 1062 1063 /*************************************************************************/ 1064 /* */ 1065 /* TrueType Face Type */ 1066 /* */ 1067 /* <Struct> */ 1068 /* TT_Face */ 1069 /* */ 1070 /* <Description> */ 1071 /* The TrueType face class. These objects model the resolution and */ 1072 /* point-size independent data found in a TrueType font file. */ 1073 /* */ 1074 /* <Fields> */ 1075 /* root :: The base FT_Face structure, managed by the */ 1076 /* base layer. */ 1077 /* */ 1078 /* ttc_header :: The TrueType collection header, used when */ 1079 /* the file is a `ttc' rather than a `ttf'. */ 1080 /* For ordinary font files, the field */ 1081 /* `ttc_header.count' is set to 0. */ 1082 /* */ 1083 /* format_tag :: The font format tag. */ 1084 /* */ 1085 /* num_tables :: The number of TrueType tables in this font */ 1086 /* file. */ 1087 /* */ 1088 /* dir_tables :: The directory of TrueType tables for this */ 1089 /* font file. */ 1090 /* */ 1091 /* header :: The font's font header (`head' table). */ 1092 /* Read on font opening. */ 1093 /* */ 1094 /* horizontal :: The font's horizontal header (`hhea' */ 1095 /* table). This field also contains the */ 1096 /* associated horizontal metrics table */ 1097 /* (`hmtx'). */ 1098 /* */ 1099 /* max_profile :: The font's maximum profile table. Read on */ 1100 /* font opening. Note that some maximum */ 1101 /* values cannot be taken directly from this */ 1102 /* table. We thus define additional fields */ 1103 /* below to hold the computed maxima. */ 1104 /* */ 1105 /* vertical_info :: A boolean which is set when the font file */ 1106 /* contains vertical metrics. If not, the */ 1107 /* value of the `vertical' field is */ 1108 /* undefined. */ 1109 /* */ 1110 /* vertical :: The font's vertical header (`vhea' table). */ 1111 /* This field also contains the associated */ 1112 /* vertical metrics table (`vmtx'), if found. */ 1113 /* IMPORTANT: The contents of this field is */ 1114 /* undefined if the `verticalInfo' field is */ 1115 /* unset. */ 1116 /* */ 1117 /* num_names :: The number of name records within this */ 1118 /* TrueType font. */ 1119 /* */ 1120 /* name_table :: The table of name records (`name'). */ 1121 /* */ 1122 /* os2 :: The font's OS/2 table (`OS/2'). */ 1123 /* */ 1124 /* postscript :: The font's PostScript table (`post' */ 1125 /* table). The PostScript glyph names are */ 1126 /* not loaded by the driver on face opening. */ 1127 /* See the `ttpost' module for more details. */ 1128 /* */ 1129 /* cmap_table :: Address of the face's `cmap' SFNT table */ 1130 /* in memory (it's an extracted frame). */ 1131 /* */ 1132 /* cmap_size :: The size in bytes of the `cmap_table' */ 1133 /* described above. */ 1134 /* */ 1135 /* goto_table :: A function called by each TrueType table */ 1136 /* loader to position a stream's cursor to */ 1137 /* the start of a given table according to */ 1138 /* its tag. It defaults to TT_Goto_Face but */ 1139 /* can be different for strange formats (e.g. */ 1140 /* Type 42). */ 1141 /* */ 1142 /* access_glyph_frame :: A function used to access the frame of a */ 1143 /* given glyph within the face's font file. */ 1144 /* */ 1145 /* forget_glyph_frame :: A function used to forget the frame of a */ 1146 /* given glyph when all data has been loaded. */ 1147 /* */ 1148 /* read_glyph_header :: A function used to read a glyph header. */ 1149 /* It must be called between an `access' and */ 1150 /* `forget'. */ 1151 /* */ 1152 /* read_simple_glyph :: A function used to read a simple glyph. */ 1153 /* It must be called after the header was */ 1154 /* read, and before the `forget'. */ 1155 /* */ 1156 /* read_composite_glyph :: A function used to read a composite glyph. */ 1157 /* It must be called after the header was */ 1158 /* read, and before the `forget'. */ 1159 /* */ 1160 /* sfnt :: A pointer to the SFNT service. */ 1161 /* */ 1162 /* psnames :: A pointer to the PostScript names service. */ 1163 /* */ 1164 /* hdmx :: The face's horizontal device metrics */ 1165 /* (`hdmx' table). This table is optional in */ 1166 /* TrueType/OpenType fonts. */ 1167 /* */ 1168 /* gasp :: The grid-fitting and scaling properties */ 1169 /* table (`gasp'). This table is optional in */ 1170 /* TrueType/OpenType fonts. */ 1171 /* */ 1172 /* pclt :: The `pclt' SFNT table. */ 1173 /* */ 1174 /* num_sbit_strikes :: The number of sbit strikes, i.e., bitmap */ 1175 /* sizes, embedded in this font. */ 1176 /* */ 1177 /* sbit_strikes :: An array of sbit strikes embedded in this */ 1178 /* font. This table is optional in a */ 1179 /* TrueType/OpenType font. */ 1180 /* */ 1181 /* num_sbit_scales :: The number of sbit scales for this font. */ 1182 /* */ 1183 /* sbit_scales :: Array of sbit scales embedded in this */ 1184 /* font. This table is optional in a */ 1185 /* TrueType/OpenType font. */ 1186 /* */ 1187 /* postscript_names :: A table used to store the Postscript names */ 1188 /* of the glyphs for this font. See the */ 1189 /* file `ttconfig.h' for comments on the */ 1190 /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ 1191 /* */ 1192 /* num_locations :: The number of glyph locations in this */ 1193 /* TrueType file. This should be */ 1194 /* identical to the number of glyphs. */ 1195 /* Ignored for Type 2 fonts. */ 1196 /* */ 1197 /* glyph_locations :: An array of longs. These are offsets to */ 1198 /* glyph data within the `glyf' table. */ 1199 /* Ignored for Type 2 font faces. */ 1200 /* */ 1201 /* glyf_len :: The length of the `glyf' table. Needed */ 1202 /* for malformed `loca' tables. */ 1203 /* */ 1204 /* font_program_size :: Size in bytecodes of the face's font */ 1205 /* program. 0 if none defined. Ignored for */ 1206 /* Type 2 fonts. */ 1207 /* */ 1208 /* font_program :: The face's font program (bytecode stream) */ 1209 /* executed at load time, also used during */ 1210 /* glyph rendering. Comes from the `fpgm' */ 1211 /* table. Ignored for Type 2 font fonts. */ 1212 /* */ 1213 /* cvt_program_size :: The size in bytecodes of the face's cvt */ 1214 /* program. Ignored for Type 2 fonts. */ 1215 /* */ 1216 /* cvt_program :: The face's cvt program (bytecode stream) */ 1217 /* executed each time an instance/size is */ 1218 /* changed/reset. Comes from the `prep' */ 1219 /* table. Ignored for Type 2 fonts. */ 1220 /* */ 1221 /* cvt_size :: Size of the control value table (in */ 1222 /* entries). Ignored for Type 2 fonts. */ 1223 /* */ 1224 /* cvt :: The face's original control value table. */ 1225 /* Coordinates are expressed in unscaled font */ 1226 /* units. Comes from the `cvt ' table. */ 1227 /* Ignored for Type 2 fonts. */ 1228 /* */ 1229 /* num_kern_pairs :: The number of kerning pairs present in the */ 1230 /* font file. The engine only loads the */ 1231 /* first horizontal format 0 kern table it */ 1232 /* finds in the font file. Ignored for */ 1233 /* Type 2 fonts. */ 1234 /* */ 1235 /* kern_table_index :: The index of the kerning table in the font */ 1236 /* kerning directory. Ignored for Type 2 */ 1237 /* fonts. */ 1238 /* */ 1239 /* interpreter :: A pointer to the TrueType bytecode */ 1240 /* interpreters field is also used to hook */ 1241 /* the debugger in `ttdebug'. */ 1242 /* */ 1243 /* unpatented_hinting :: If true, use only unpatented methods in */ 1244 /* the bytecode interpreter. */ 1245 /* */ 1246 /* doblend :: A boolean which is set if the font should */ 1247 /* be blended (this is for GX var). */ 1248 /* */ 1249 /* blend :: Contains the data needed to control GX */ 1250 /* variation tables (rather like Multiple */ 1251 /* Master data). */ 1252 /* */ 1253 /* extra :: Reserved for third-party font drivers. */ 1254 /* */ 1255 /* postscript_name :: The PS name of the font. Used by the */ 1256 /* postscript name service. */ 1257 /* */ 1258 typedef struct TT_FaceRec_ 1259 { 1260 FT_FaceRec root; 1261 1262 TTC_HeaderRec ttc_header; 1263 1264 FT_ULong format_tag; 1265 FT_UShort num_tables; 1266 TT_Table dir_tables; 1267 1268 TT_Header header; /* TrueType header table */ 1269 TT_HoriHeader horizontal; /* TrueType horizontal header */ 1270 1271 TT_MaxProfile max_profile; 1272#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 1273 FT_ULong max_components; /* stubbed to 0 */ 1274#endif 1275 1276 FT_Bool vertical_info; 1277 TT_VertHeader vertical; /* TT Vertical header, if present */ 1278 1279 FT_UShort num_names; /* number of name records */ 1280 TT_NameTableRec name_table; /* name table */ 1281 1282 TT_OS2 os2; /* TrueType OS/2 table */ 1283 TT_Postscript postscript; /* TrueType Postscript table */ 1284 1285 FT_Byte* cmap_table; /* extracted `cmap' table */ 1286 FT_ULong cmap_size; 1287 1288 TT_Loader_GotoTableFunc goto_table; 1289 1290 TT_Loader_StartGlyphFunc access_glyph_frame; 1291 TT_Loader_EndGlyphFunc forget_glyph_frame; 1292 TT_Loader_ReadGlyphFunc read_glyph_header; 1293 TT_Loader_ReadGlyphFunc read_simple_glyph; 1294 TT_Loader_ReadGlyphFunc read_composite_glyph; 1295 1296 /* a typeless pointer to the SFNT_Interface table used to load */ 1297 /* the basic TrueType tables in the face object */ 1298 void* sfnt; 1299 1300 /* a typeless pointer to the FT_Service_PsCMapsRec table used to */ 1301 /* handle glyph names <-> unicode & Mac values */ 1302 void* psnames; 1303 1304 1305 /***********************************************************************/ 1306 /* */ 1307 /* Optional TrueType/OpenType tables */ 1308 /* */ 1309 /***********************************************************************/ 1310 1311 /* horizontal device metrics */ 1312#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 1313 TT_HdmxRec hdmx; 1314#endif 1315 1316 /* grid-fitting and scaling table */ 1317 TT_GaspRec gasp; /* the `gasp' table */ 1318 1319 /* PCL 5 table */ 1320 TT_PCLT pclt; 1321 1322 /* embedded bitmaps support */ 1323#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 1324 FT_ULong num_sbit_strikes; 1325 TT_SBit_Strike sbit_strikes; 1326#endif 1327 1328 FT_ULong num_sbit_scales; 1329 TT_SBit_Scale sbit_scales; 1330 1331 /* postscript names table */ 1332 TT_Post_NamesRec postscript_names; 1333 1334 1335 /***********************************************************************/ 1336 /* */ 1337 /* TrueType-specific fields (ignored by the OTF-Type2 driver) */ 1338 /* */ 1339 /***********************************************************************/ 1340 1341 /* the glyph locations */ 1342#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 1343 FT_UShort num_locations_stub; 1344 FT_Long* glyph_locations_stub; 1345#endif 1346 1347 /* the font program, if any */ 1348 FT_ULong font_program_size; 1349 FT_Byte* font_program; 1350 1351 /* the cvt program, if any */ 1352 FT_ULong cvt_program_size; 1353 FT_Byte* cvt_program; 1354 1355 /* the original, unscaled, control value table */ 1356 FT_ULong cvt_size; 1357 FT_Short* cvt; 1358 1359#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 1360 /* the format 0 kerning table, if any */ 1361 FT_Int num_kern_pairs; 1362 FT_Int kern_table_index; 1363 TT_Kern0_Pair kern_pairs; 1364#endif 1365 1366 /* A pointer to the bytecode interpreter to use. This is also */ 1367 /* used to hook the debugger for the `ttdebug' utility. */ 1368 TT_Interpreter interpreter; 1369 1370#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING 1371 /* Use unpatented hinting only. */ 1372 FT_Bool unpatented_hinting; 1373#endif 1374 1375 /***********************************************************************/ 1376 /* */ 1377 /* Other tables or fields. This is used by derivative formats like */ 1378 /* OpenType. */ 1379 /* */ 1380 /***********************************************************************/ 1381 1382 FT_Generic extra; 1383 1384 const char* postscript_name; 1385 1386 /* since version 2.1.8, but was originally placed after */ 1387 /* `glyph_locations_stub' */ 1388 FT_ULong glyf_len; 1389 1390 /* since version 2.1.8, but was originally placed before `extra' */ 1391#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 1392 FT_Bool doblend; 1393 GX_Blend blend; 1394#endif 1395 1396 /* since version 2.2 */ 1397 1398 FT_Byte* horz_metrics; 1399 FT_ULong horz_metrics_size; 1400 1401 FT_Byte* vert_metrics; 1402 FT_ULong vert_metrics_size; 1403 1404 FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */ 1405 FT_Byte* glyph_locations; 1406 1407 FT_Byte* hdmx_table; 1408 FT_ULong hdmx_table_size; 1409 FT_UInt hdmx_record_count; 1410 FT_ULong hdmx_record_size; 1411 FT_Byte* hdmx_record_sizes; 1412 1413 FT_Byte* sbit_table; 1414 FT_ULong sbit_table_size; 1415 FT_UInt sbit_num_strikes; 1416 1417 FT_Byte* kern_table; 1418 FT_ULong kern_table_size; 1419 FT_UInt num_kern_tables; 1420 FT_UInt32 kern_avail_bits; 1421 FT_UInt32 kern_order_bits; 1422 1423#ifdef TT_CONFIG_OPTION_BDF 1424 TT_BDFRec bdf; 1425#endif /* TT_CONFIG_OPTION_BDF */ 1426 1427 /* since 2.3.0 */ 1428 FT_ULong horz_metrics_offset; 1429 FT_ULong vert_metrics_offset; 1430 1431 } TT_FaceRec; 1432 1433 1434 /*************************************************************************/ 1435 /* */ 1436 /* <Struct> */ 1437 /* TT_GlyphZoneRec */ 1438 /* */ 1439 /* <Description> */ 1440 /* A glyph zone is used to load, scale and hint glyph outline */ 1441 /* coordinates. */ 1442 /* */ 1443 /* <Fields> */ 1444 /* memory :: A handle to the memory manager. */ 1445 /* */ 1446 /* max_points :: The maximal size in points of the zone. */ 1447 /* */ 1448 /* max_contours :: Max size in links contours of the zone. */ 1449 /* */ 1450 /* n_points :: The current number of points in the zone. */ 1451 /* */ 1452 /* n_contours :: The current number of contours in the zone. */ 1453 /* */ 1454 /* org :: The original glyph coordinates (font */ 1455 /* units/scaled). */ 1456 /* */ 1457 /* cur :: The current glyph coordinates (scaled/hinted). */ 1458 /* */ 1459 /* tags :: The point control tags. */ 1460 /* */ 1461 /* contours :: The contours end points. */ 1462 /* */ 1463 /* first_point :: Offset of the current subglyph's first point. */ 1464 /* */ 1465 typedef struct TT_GlyphZoneRec_ 1466 { 1467 FT_Memory memory; 1468 FT_UShort max_points; 1469 FT_UShort max_contours; 1470 FT_UShort n_points; /* number of points in zone */ 1471 FT_Short n_contours; /* number of contours */ 1472 1473 FT_Vector* org; /* original point coordinates */ 1474 FT_Vector* cur; /* current point coordinates */ 1475 FT_Vector* orus; /* original (unscaled) point coordinates */ 1476 1477 FT_Byte* tags; /* current touch flags */ 1478 FT_UShort* contours; /* contour end points */ 1479 1480 FT_UShort first_point; /* offset of first (#0) point */ 1481 1482 } TT_GlyphZoneRec, *TT_GlyphZone; 1483 1484 1485 /* handle to execution context */ 1486 typedef struct TT_ExecContextRec_* TT_ExecContext; 1487 1488 /* glyph loader structure */ 1489 typedef struct TT_LoaderRec_ 1490 { 1491 FT_Face face; 1492 FT_Size size; 1493 FT_GlyphSlot glyph; 1494 FT_GlyphLoader gloader; 1495 1496 FT_ULong load_flags; 1497 FT_UInt glyph_index; 1498 1499 FT_Stream stream; 1500 FT_Int byte_len; 1501 1502 FT_Short n_contours; 1503 FT_BBox bbox; 1504 FT_Int left_bearing; 1505 FT_Int advance; 1506 FT_Int linear; 1507 FT_Bool linear_def; 1508 FT_Bool preserve_pps; 1509 FT_Vector pp1; 1510 FT_Vector pp2; 1511 1512 FT_ULong glyf_offset; 1513 1514 /* the zone where we load our glyphs */ 1515 TT_GlyphZoneRec base; 1516 TT_GlyphZoneRec zone; 1517 1518 TT_ExecContext exec; 1519 FT_Byte* instructions; 1520 FT_ULong ins_pos; 1521 1522 /* for possible extensibility in other formats */ 1523 void* other; 1524 1525 /* since version 2.1.8 */ 1526 FT_Int top_bearing; 1527 FT_Int vadvance; 1528 FT_Vector pp3; 1529 FT_Vector pp4; 1530 1531 /* since version 2.2.1 */ 1532 FT_Byte* cursor; 1533 FT_Byte* limit; 1534 1535 } TT_LoaderRec; 1536 1537 1538FT_END_HEADER 1539 1540#endif /* __TTTYPES_H__ */ 1541 1542 1543/* END */ 1544