tttypes.h revision ec0bab5697bb31ba980810145f62e3799946ec60
1/***************************************************************************/ 2/* */ 3/* tttypes.h */ 4/* */ 5/* Basic SFNT/TrueType type definitions and interface (specification */ 6/* only). */ 7/* */ 8/* Copyright 1996-2002, 2004-2008, 2012-2013 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 /* WOFF_HeaderRec */ 144 /* */ 145 /* <Description> */ 146 /* WOFF file format header. */ 147 /* */ 148 /* <Fields> */ 149 /* See */ 150 /* */ 151 /* http://www.w3.org/TR/WOFF/#WOFFHeader */ 152 /* */ 153 typedef struct WOFF_HeaderRec_ 154 { 155 FT_ULong signature; 156 FT_ULong flavor; 157 FT_ULong length; 158 FT_UShort num_tables; 159 FT_UShort reserved; 160 FT_ULong totalSfntSize; 161 FT_UShort majorVersion; 162 FT_UShort minorVersion; 163 FT_ULong metaOffset; 164 FT_ULong metaLength; 165 FT_ULong metaOrigLength; 166 FT_ULong privOffset; 167 FT_ULong privLength; 168 169 } WOFF_HeaderRec, *WOFF_Header; 170 171 172 /*************************************************************************/ 173 /* */ 174 /* <Struct> */ 175 /* WOFF_TableRec */ 176 /* */ 177 /* <Description> */ 178 /* This structure describes a given table of a WOFF font. */ 179 /* */ 180 /* <Fields> */ 181 /* Tag :: A four-bytes tag describing the table. */ 182 /* */ 183 /* Offset :: The offset of the table from the start of the WOFF */ 184 /* font in its resource. */ 185 /* */ 186 /* CompLength :: Compressed table length (in bytes). */ 187 /* */ 188 /* OrigLength :: Unompressed table length (in bytes). */ 189 /* */ 190 /* CheckSum :: The table checksum. This value can be ignored. */ 191 /* */ 192 /* OrigOffset :: The uncompressed table file offset. This value gets */ 193 /* computed while constructing the (uncompressed) SFNT */ 194 /* header. It is not contained in the WOFF file. */ 195 /* */ 196 typedef struct WOFF_TableRec_ 197 { 198 FT_ULong Tag; /* table ID */ 199 FT_ULong Offset; /* table file offset */ 200 FT_ULong CompLength; /* compressed table length */ 201 FT_ULong OrigLength; /* uncompressed table length */ 202 FT_ULong CheckSum; /* uncompressed checksum */ 203 204 FT_ULong OrigOffset; /* uncompressed table file offset */ 205 /* (not in the WOFF file) */ 206 } WOFF_TableRec, *WOFF_Table; 207 208 209 /*************************************************************************/ 210 /* */ 211 /* <Struct> */ 212 /* TT_LongMetricsRec */ 213 /* */ 214 /* <Description> */ 215 /* A structure modeling the long metrics of the `hmtx' and `vmtx' */ 216 /* TrueType tables. The values are expressed in font units. */ 217 /* */ 218 /* <Fields> */ 219 /* advance :: The advance width or height for the glyph. */ 220 /* */ 221 /* bearing :: The left-side or top-side bearing for the glyph. */ 222 /* */ 223 typedef struct TT_LongMetricsRec_ 224 { 225 FT_UShort advance; 226 FT_Short bearing; 227 228 } TT_LongMetricsRec, *TT_LongMetrics; 229 230 231 /*************************************************************************/ 232 /* */ 233 /* <Type> */ 234 /* TT_ShortMetrics */ 235 /* */ 236 /* <Description> */ 237 /* A simple type to model the short metrics of the `hmtx' and `vmtx' */ 238 /* tables. */ 239 /* */ 240 typedef FT_Short TT_ShortMetrics; 241 242 243 /*************************************************************************/ 244 /* */ 245 /* <Struct> */ 246 /* TT_NameEntryRec */ 247 /* */ 248 /* <Description> */ 249 /* A structure modeling TrueType name records. Name records are used */ 250 /* to store important strings like family name, style name, */ 251 /* copyright, etc. in _localized_ versions (i.e., language, encoding, */ 252 /* etc). */ 253 /* */ 254 /* <Fields> */ 255 /* platformID :: The ID of the name's encoding platform. */ 256 /* */ 257 /* encodingID :: The platform-specific ID for the name's encoding. */ 258 /* */ 259 /* languageID :: The platform-specific ID for the name's language. */ 260 /* */ 261 /* nameID :: The ID specifying what kind of name this is. */ 262 /* */ 263 /* stringLength :: The length of the string in bytes. */ 264 /* */ 265 /* stringOffset :: The offset to the string in the `name' table. */ 266 /* */ 267 /* string :: A pointer to the string's bytes. Note that these */ 268 /* are usually UTF-16 encoded characters. */ 269 /* */ 270 typedef struct TT_NameEntryRec_ 271 { 272 FT_UShort platformID; 273 FT_UShort encodingID; 274 FT_UShort languageID; 275 FT_UShort nameID; 276 FT_UShort stringLength; 277 FT_ULong stringOffset; 278 279 /* this last field is not defined in the spec */ 280 /* but used by the FreeType engine */ 281 282 FT_Byte* string; 283 284 } TT_NameEntryRec, *TT_NameEntry; 285 286 287 /*************************************************************************/ 288 /* */ 289 /* <Struct> */ 290 /* TT_NameTableRec */ 291 /* */ 292 /* <Description> */ 293 /* A structure modeling the TrueType name table. */ 294 /* */ 295 /* <Fields> */ 296 /* format :: The format of the name table. */ 297 /* */ 298 /* numNameRecords :: The number of names in table. */ 299 /* */ 300 /* storageOffset :: The offset of the name table in the `name' */ 301 /* TrueType table. */ 302 /* */ 303 /* names :: An array of name records. */ 304 /* */ 305 /* stream :: the file's input stream. */ 306 /* */ 307 typedef struct TT_NameTableRec_ 308 { 309 FT_UShort format; 310 FT_UInt numNameRecords; 311 FT_UInt storageOffset; 312 TT_NameEntryRec* names; 313 FT_Stream stream; 314 315 } TT_NameTableRec, *TT_NameTable; 316 317 318 /*************************************************************************/ 319 /*************************************************************************/ 320 /*************************************************************************/ 321 /*** ***/ 322 /*** ***/ 323 /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ 324 /*** ***/ 325 /*** ***/ 326 /*************************************************************************/ 327 /*************************************************************************/ 328 /*************************************************************************/ 329 330 331 /*************************************************************************/ 332 /* */ 333 /* <Struct> */ 334 /* TT_GaspRangeRec */ 335 /* */ 336 /* <Description> */ 337 /* A tiny structure used to model a gasp range according to the */ 338 /* TrueType specification. */ 339 /* */ 340 /* <Fields> */ 341 /* maxPPEM :: The maximum ppem value to which `gaspFlag' applies. */ 342 /* */ 343 /* gaspFlag :: A flag describing the grid-fitting and anti-aliasing */ 344 /* modes to be used. */ 345 /* */ 346 typedef struct TT_GaspRangeRec_ 347 { 348 FT_UShort maxPPEM; 349 FT_UShort gaspFlag; 350 351 } TT_GaspRangeRec, *TT_GaspRange; 352 353 354#define TT_GASP_GRIDFIT 0x01 355#define TT_GASP_DOGRAY 0x02 356 357 358 /*************************************************************************/ 359 /* */ 360 /* <Struct> */ 361 /* TT_GaspRec */ 362 /* */ 363 /* <Description> */ 364 /* A structure modeling the TrueType `gasp' table used to specify */ 365 /* grid-fitting and anti-aliasing behaviour. */ 366 /* */ 367 /* <Fields> */ 368 /* version :: The version number. */ 369 /* */ 370 /* numRanges :: The number of gasp ranges in table. */ 371 /* */ 372 /* gaspRanges :: An array of gasp ranges. */ 373 /* */ 374 typedef struct TT_Gasp_ 375 { 376 FT_UShort version; 377 FT_UShort numRanges; 378 TT_GaspRange gaspRanges; 379 380 } TT_GaspRec; 381 382 383 /*************************************************************************/ 384 /*************************************************************************/ 385 /*************************************************************************/ 386 /*** ***/ 387 /*** ***/ 388 /*** EMBEDDED BITMAPS SUPPORT ***/ 389 /*** ***/ 390 /*** ***/ 391 /*************************************************************************/ 392 /*************************************************************************/ 393 /*************************************************************************/ 394 395 396 /*************************************************************************/ 397 /* */ 398 /* <Struct> */ 399 /* TT_SBit_MetricsRec */ 400 /* */ 401 /* <Description> */ 402 /* A structure used to hold the big metrics of a given glyph bitmap */ 403 /* in a TrueType or OpenType font. These are usually found in the */ 404 /* `EBDT' (Microsoft) or `bloc' (Apple) table. */ 405 /* */ 406 /* <Fields> */ 407 /* height :: The glyph height in pixels. */ 408 /* */ 409 /* width :: The glyph width in pixels. */ 410 /* */ 411 /* horiBearingX :: The horizontal left bearing. */ 412 /* */ 413 /* horiBearingY :: The horizontal top bearing. */ 414 /* */ 415 /* horiAdvance :: The horizontal advance. */ 416 /* */ 417 /* vertBearingX :: The vertical left bearing. */ 418 /* */ 419 /* vertBearingY :: The vertical top bearing. */ 420 /* */ 421 /* vertAdvance :: The vertical advance. */ 422 /* */ 423 typedef struct TT_SBit_MetricsRec_ 424 { 425 FT_UShort height; 426 FT_UShort width; 427 428 FT_Short horiBearingX; 429 FT_Short horiBearingY; 430 FT_UShort horiAdvance; 431 432 FT_Short vertBearingX; 433 FT_Short vertBearingY; 434 FT_UShort vertAdvance; 435 436 } TT_SBit_MetricsRec, *TT_SBit_Metrics; 437 438 439 /*************************************************************************/ 440 /* */ 441 /* <Struct> */ 442 /* TT_SBit_SmallMetricsRec */ 443 /* */ 444 /* <Description> */ 445 /* A structure used to hold the small metrics of a given glyph bitmap */ 446 /* in a TrueType or OpenType font. These are usually found in the */ 447 /* `EBDT' (Microsoft) or the `bdat' (Apple) table. */ 448 /* */ 449 /* <Fields> */ 450 /* height :: The glyph height in pixels. */ 451 /* */ 452 /* width :: The glyph width in pixels. */ 453 /* */ 454 /* bearingX :: The left-side bearing. */ 455 /* */ 456 /* bearingY :: The top-side bearing. */ 457 /* */ 458 /* advance :: The advance width or height. */ 459 /* */ 460 typedef struct TT_SBit_Small_Metrics_ 461 { 462 FT_Byte height; 463 FT_Byte width; 464 465 FT_Char bearingX; 466 FT_Char bearingY; 467 FT_Byte advance; 468 469 } TT_SBit_SmallMetricsRec, *TT_SBit_SmallMetrics; 470 471 472 /*************************************************************************/ 473 /* */ 474 /* <Struct> */ 475 /* TT_SBit_LineMetricsRec */ 476 /* */ 477 /* <Description> */ 478 /* A structure used to describe the text line metrics of a given */ 479 /* bitmap strike, for either a horizontal or vertical layout. */ 480 /* */ 481 /* <Fields> */ 482 /* ascender :: The ascender in pixels. */ 483 /* */ 484 /* descender :: The descender in pixels. */ 485 /* */ 486 /* max_width :: The maximum glyph width in pixels. */ 487 /* */ 488 /* caret_slope_enumerator :: Rise of the caret slope, typically set */ 489 /* to 1 for non-italic fonts. */ 490 /* */ 491 /* caret_slope_denominator :: Rise of the caret slope, typically set */ 492 /* to 0 for non-italic fonts. */ 493 /* */ 494 /* caret_offset :: Offset in pixels to move the caret for */ 495 /* proper positioning. */ 496 /* */ 497 /* min_origin_SB :: Minimum of horiBearingX (resp. */ 498 /* vertBearingY). */ 499 /* min_advance_SB :: Minimum of */ 500 /* */ 501 /* horizontal advance - */ 502 /* ( horiBearingX + width ) */ 503 /* */ 504 /* resp. */ 505 /* */ 506 /* vertical advance - */ 507 /* ( vertBearingY + height ) */ 508 /* */ 509 /* max_before_BL :: Maximum of horiBearingY (resp. */ 510 /* vertBearingY). */ 511 /* */ 512 /* min_after_BL :: Minimum of */ 513 /* */ 514 /* horiBearingY - height */ 515 /* */ 516 /* resp. */ 517 /* */ 518 /* vertBearingX - width */ 519 /* */ 520 /* pads :: Unused (to make the size of the record */ 521 /* a multiple of 32 bits. */ 522 /* */ 523 typedef struct TT_SBit_LineMetricsRec_ 524 { 525 FT_Char ascender; 526 FT_Char descender; 527 FT_Byte max_width; 528 FT_Char caret_slope_numerator; 529 FT_Char caret_slope_denominator; 530 FT_Char caret_offset; 531 FT_Char min_origin_SB; 532 FT_Char min_advance_SB; 533 FT_Char max_before_BL; 534 FT_Char min_after_BL; 535 FT_Char pads[2]; 536 537 } TT_SBit_LineMetricsRec, *TT_SBit_LineMetrics; 538 539 540 /*************************************************************************/ 541 /* */ 542 /* <Struct> */ 543 /* TT_SBit_RangeRec */ 544 /* */ 545 /* <Description> */ 546 /* A TrueType/OpenType subIndexTable as defined in the `EBLC' */ 547 /* (Microsoft) or `bloc' (Apple) tables. */ 548 /* */ 549 /* <Fields> */ 550 /* first_glyph :: The first glyph index in the range. */ 551 /* */ 552 /* last_glyph :: The last glyph index in the range. */ 553 /* */ 554 /* index_format :: The format of index table. Valid values are 1 */ 555 /* to 5. */ 556 /* */ 557 /* image_format :: The format of `EBDT' image data. */ 558 /* */ 559 /* image_offset :: The offset to image data in `EBDT'. */ 560 /* */ 561 /* image_size :: For index formats 2 and 5. This is the size in */ 562 /* bytes of each glyph bitmap. */ 563 /* */ 564 /* big_metrics :: For index formats 2 and 5. This is the big */ 565 /* metrics for each glyph bitmap. */ 566 /* */ 567 /* num_glyphs :: For index formats 4 and 5. This is the number of */ 568 /* glyphs in the code array. */ 569 /* */ 570 /* glyph_offsets :: For index formats 1 and 3. */ 571 /* */ 572 /* glyph_codes :: For index formats 4 and 5. */ 573 /* */ 574 /* table_offset :: The offset of the index table in the `EBLC' */ 575 /* table. Only used during strike loading. */ 576 /* */ 577 typedef struct TT_SBit_RangeRec_ 578 { 579 FT_UShort first_glyph; 580 FT_UShort last_glyph; 581 582 FT_UShort index_format; 583 FT_UShort image_format; 584 FT_ULong image_offset; 585 586 FT_ULong image_size; 587 TT_SBit_MetricsRec metrics; 588 FT_ULong num_glyphs; 589 590 FT_ULong* glyph_offsets; 591 FT_UShort* glyph_codes; 592 593 FT_ULong table_offset; 594 595 } TT_SBit_RangeRec, *TT_SBit_Range; 596 597 598 /*************************************************************************/ 599 /* */ 600 /* <Struct> */ 601 /* TT_SBit_StrikeRec */ 602 /* */ 603 /* <Description> */ 604 /* A structure used describe a given bitmap strike in the `EBLC' */ 605 /* (Microsoft) or `bloc' (Apple) tables. */ 606 /* */ 607 /* <Fields> */ 608 /* num_index_ranges :: The number of index ranges. */ 609 /* */ 610 /* index_ranges :: An array of glyph index ranges. */ 611 /* */ 612 /* color_ref :: Unused. `color_ref' is put in for future */ 613 /* enhancements, but these fields are already */ 614 /* in use by other platforms (e.g. Newton). */ 615 /* For details, please see */ 616 /* */ 617 /* http://fonts.apple.com/ */ 618 /* TTRefMan/RM06/Chap6bloc.html */ 619 /* */ 620 /* hori :: The line metrics for horizontal layouts. */ 621 /* */ 622 /* vert :: The line metrics for vertical layouts. */ 623 /* */ 624 /* start_glyph :: The lowest glyph index for this strike. */ 625 /* */ 626 /* end_glyph :: The highest glyph index for this strike. */ 627 /* */ 628 /* x_ppem :: The number of horizontal pixels per EM. */ 629 /* */ 630 /* y_ppem :: The number of vertical pixels per EM. */ 631 /* */ 632 /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */ 633 /* and 8. */ 634 /* */ 635 /* flags :: Is this a vertical or horizontal strike? For */ 636 /* details, please see */ 637 /* */ 638 /* http://fonts.apple.com/ */ 639 /* TTRefMan/RM06/Chap6bloc.html */ 640 /* */ 641 typedef struct TT_SBit_StrikeRec_ 642 { 643 FT_Int num_ranges; 644 TT_SBit_Range sbit_ranges; 645 FT_ULong ranges_offset; 646 647 FT_ULong color_ref; 648 649 TT_SBit_LineMetricsRec hori; 650 TT_SBit_LineMetricsRec vert; 651 652 FT_UShort start_glyph; 653 FT_UShort end_glyph; 654 655 FT_Byte x_ppem; 656 FT_Byte y_ppem; 657 658 FT_Byte bit_depth; 659 FT_Char flags; 660 661 } TT_SBit_StrikeRec, *TT_SBit_Strike; 662 663 664 /*************************************************************************/ 665 /* */ 666 /* <Struct> */ 667 /* TT_SBit_ComponentRec */ 668 /* */ 669 /* <Description> */ 670 /* A simple structure to describe a compound sbit element. */ 671 /* */ 672 /* <Fields> */ 673 /* glyph_code :: The element's glyph index. */ 674 /* */ 675 /* x_offset :: The element's left bearing. */ 676 /* */ 677 /* y_offset :: The element's top bearing. */ 678 /* */ 679 typedef struct TT_SBit_ComponentRec_ 680 { 681 FT_UShort glyph_code; 682 FT_Char x_offset; 683 FT_Char y_offset; 684 685 } TT_SBit_ComponentRec, *TT_SBit_Component; 686 687 688 /*************************************************************************/ 689 /* */ 690 /* <Struct> */ 691 /* TT_SBit_ScaleRec */ 692 /* */ 693 /* <Description> */ 694 /* A structure used describe a given bitmap scaling table, as defined */ 695 /* in the `EBSC' table. */ 696 /* */ 697 /* <Fields> */ 698 /* hori :: The horizontal line metrics. */ 699 /* */ 700 /* vert :: The vertical line metrics. */ 701 /* */ 702 /* x_ppem :: The number of horizontal pixels per EM. */ 703 /* */ 704 /* y_ppem :: The number of vertical pixels per EM. */ 705 /* */ 706 /* x_ppem_substitute :: Substitution x_ppem value. */ 707 /* */ 708 /* y_ppem_substitute :: Substitution y_ppem value. */ 709 /* */ 710 typedef struct TT_SBit_ScaleRec_ 711 { 712 TT_SBit_LineMetricsRec hori; 713 TT_SBit_LineMetricsRec vert; 714 715 FT_Byte x_ppem; 716 FT_Byte y_ppem; 717 718 FT_Byte x_ppem_substitute; 719 FT_Byte y_ppem_substitute; 720 721 } TT_SBit_ScaleRec, *TT_SBit_Scale; 722 723 724 /*************************************************************************/ 725 /*************************************************************************/ 726 /*************************************************************************/ 727 /*** ***/ 728 /*** ***/ 729 /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/ 730 /*** ***/ 731 /*** ***/ 732 /*************************************************************************/ 733 /*************************************************************************/ 734 /*************************************************************************/ 735 736 737 /*************************************************************************/ 738 /* */ 739 /* <Struct> */ 740 /* TT_Post_20Rec */ 741 /* */ 742 /* <Description> */ 743 /* Postscript names sub-table, format 2.0. Stores the PS name of */ 744 /* each glyph in the font face. */ 745 /* */ 746 /* <Fields> */ 747 /* num_glyphs :: The number of named glyphs in the table. */ 748 /* */ 749 /* num_names :: The number of PS names stored in the table. */ 750 /* */ 751 /* glyph_indices :: The indices of the glyphs in the names arrays. */ 752 /* */ 753 /* glyph_names :: The PS names not in Mac Encoding. */ 754 /* */ 755 typedef struct TT_Post_20Rec_ 756 { 757 FT_UShort num_glyphs; 758 FT_UShort num_names; 759 FT_UShort* glyph_indices; 760 FT_Char** glyph_names; 761 762 } TT_Post_20Rec, *TT_Post_20; 763 764 765 /*************************************************************************/ 766 /* */ 767 /* <Struct> */ 768 /* TT_Post_25Rec */ 769 /* */ 770 /* <Description> */ 771 /* Postscript names sub-table, format 2.5. Stores the PS name of */ 772 /* each glyph in the font face. */ 773 /* */ 774 /* <Fields> */ 775 /* num_glyphs :: The number of glyphs in the table. */ 776 /* */ 777 /* offsets :: An array of signed offsets in a normal Mac */ 778 /* Postscript name encoding. */ 779 /* */ 780 typedef struct TT_Post_25_ 781 { 782 FT_UShort num_glyphs; 783 FT_Char* offsets; 784 785 } TT_Post_25Rec, *TT_Post_25; 786 787 788 /*************************************************************************/ 789 /* */ 790 /* <Struct> */ 791 /* TT_Post_NamesRec */ 792 /* */ 793 /* <Description> */ 794 /* Postscript names table, either format 2.0 or 2.5. */ 795 /* */ 796 /* <Fields> */ 797 /* loaded :: A flag to indicate whether the PS names are loaded. */ 798 /* */ 799 /* format_20 :: The sub-table used for format 2.0. */ 800 /* */ 801 /* format_25 :: The sub-table used for format 2.5. */ 802 /* */ 803 typedef struct TT_Post_NamesRec_ 804 { 805 FT_Bool loaded; 806 807 union 808 { 809 TT_Post_20Rec format_20; 810 TT_Post_25Rec format_25; 811 812 } names; 813 814 } TT_Post_NamesRec, *TT_Post_Names; 815 816 817 /*************************************************************************/ 818 /*************************************************************************/ 819 /*************************************************************************/ 820 /*** ***/ 821 /*** ***/ 822 /*** GX VARIATION TABLE SUPPORT ***/ 823 /*** ***/ 824 /*** ***/ 825 /*************************************************************************/ 826 /*************************************************************************/ 827 /*************************************************************************/ 828 829 830#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 831 typedef struct GX_BlendRec_ *GX_Blend; 832#endif 833 834 /*************************************************************************/ 835 /*************************************************************************/ 836 /*************************************************************************/ 837 /*** ***/ 838 /*** ***/ 839 /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/ 840 /*** ***/ 841 /*** ***/ 842 /*************************************************************************/ 843 /*************************************************************************/ 844 /*************************************************************************/ 845 846 /* 847 * These types are used to support a `BDF ' table that isn't part of the 848 * official TrueType specification. It is mainly used in SFNT-based 849 * bitmap fonts that were generated from a set of BDF fonts. 850 * 851 * The format of the table is as follows. 852 * 853 * USHORT version `BDF ' table version number, should be 0x0001. 854 * USHORT strikeCount Number of strikes (bitmap sizes) in this table. 855 * ULONG stringTable Offset (from start of BDF table) to string 856 * table. 857 * 858 * This is followed by an array of `strikeCount' descriptors, having the 859 * following format. 860 * 861 * USHORT ppem Vertical pixels per EM for this strike. 862 * USHORT numItems Number of items for this strike (properties and 863 * atoms). Maximum is 255. 864 * 865 * This array in turn is followed by `strikeCount' value sets. Each 866 * `value set' is an array of `numItems' items with the following format. 867 * 868 * ULONG item_name Offset in string table to item name. 869 * USHORT item_type The item type. Possible values are 870 * 0 => string (e.g., COMMENT) 871 * 1 => atom (e.g., FONT or even SIZE) 872 * 2 => int32 873 * 3 => uint32 874 * 0x10 => A flag to indicate a properties. This 875 * is ORed with the above values. 876 * ULONG item_value For strings => Offset into string table without 877 * the corresponding double quotes. 878 * For atoms => Offset into string table. 879 * For integers => Direct value. 880 * 881 * All strings in the string table consist of bytes and are 882 * zero-terminated. 883 * 884 */ 885 886#ifdef TT_CONFIG_OPTION_BDF 887 888 typedef struct TT_BDFRec_ 889 { 890 FT_Byte* table; 891 FT_Byte* table_end; 892 FT_Byte* strings; 893 FT_ULong strings_size; 894 FT_UInt num_strikes; 895 FT_Bool loaded; 896 897 } TT_BDFRec, *TT_BDF; 898 899#endif /* TT_CONFIG_OPTION_BDF */ 900 901 /*************************************************************************/ 902 /*************************************************************************/ 903 /*************************************************************************/ 904 /*** ***/ 905 /*** ***/ 906 /*** ORIGINAL TT_FACE CLASS DEFINITION ***/ 907 /*** ***/ 908 /*** ***/ 909 /*************************************************************************/ 910 /*************************************************************************/ 911 /*************************************************************************/ 912 913 914 /*************************************************************************/ 915 /* */ 916 /* This structure/class is defined here because it is common to the */ 917 /* following formats: TTF, OpenType-TT, and OpenType-CFF. */ 918 /* */ 919 /* Note, however, that the classes TT_Size and TT_GlyphSlot are not */ 920 /* shared between font drivers, and are thus defined in `ttobjs.h'. */ 921 /* */ 922 /*************************************************************************/ 923 924 925 /*************************************************************************/ 926 /* */ 927 /* <Type> */ 928 /* TT_Face */ 929 /* */ 930 /* <Description> */ 931 /* A handle to a TrueType face/font object. A TT_Face encapsulates */ 932 /* the resolution and scaling independent parts of a TrueType font */ 933 /* resource. */ 934 /* */ 935 /* <Note> */ 936 /* The TT_Face structure is also used as a `parent class' for the */ 937 /* OpenType-CFF class (T2_Face). */ 938 /* */ 939 typedef struct TT_FaceRec_* TT_Face; 940 941 942 /* a function type used for the truetype bytecode interpreter hooks */ 943 typedef FT_Error 944 (*TT_Interpreter)( void* exec_context ); 945 946 /* forward declaration */ 947 typedef struct TT_LoaderRec_* TT_Loader; 948 949 950 /*************************************************************************/ 951 /* */ 952 /* <FuncType> */ 953 /* TT_Loader_GotoTableFunc */ 954 /* */ 955 /* <Description> */ 956 /* Seeks a stream to the start of a given TrueType table. */ 957 /* */ 958 /* <Input> */ 959 /* face :: A handle to the target face object. */ 960 /* */ 961 /* tag :: A 4-byte tag used to name the table. */ 962 /* */ 963 /* stream :: The input stream. */ 964 /* */ 965 /* <Output> */ 966 /* length :: The length of the table in bytes. Set to 0 if not */ 967 /* needed. */ 968 /* */ 969 /* <Return> */ 970 /* FreeType error code. 0 means success. */ 971 /* */ 972 /* <Note> */ 973 /* The stream cursor must be at the font file's origin. */ 974 /* */ 975 typedef FT_Error 976 (*TT_Loader_GotoTableFunc)( TT_Face face, 977 FT_ULong tag, 978 FT_Stream stream, 979 FT_ULong* length ); 980 981 982 /*************************************************************************/ 983 /* */ 984 /* <FuncType> */ 985 /* TT_Loader_StartGlyphFunc */ 986 /* */ 987 /* <Description> */ 988 /* Seeks a stream to the start of a given glyph element, and opens a */ 989 /* frame for it. */ 990 /* */ 991 /* <Input> */ 992 /* loader :: The current TrueType glyph loader object. */ 993 /* */ 994 /* glyph index :: The index of the glyph to access. */ 995 /* */ 996 /* offset :: The offset of the glyph according to the */ 997 /* `locations' table. */ 998 /* */ 999 /* byte_count :: The size of the frame in bytes. */ 1000 /* */ 1001 /* <Return> */ 1002 /* FreeType error code. 0 means success. */ 1003 /* */ 1004 /* <Note> */ 1005 /* This function is normally equivalent to FT_STREAM_SEEK(offset) */ 1006 /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */ 1007 /* but alternative formats (e.g. compressed ones) might use something */ 1008 /* different. */ 1009 /* */ 1010 typedef FT_Error 1011 (*TT_Loader_StartGlyphFunc)( TT_Loader loader, 1012 FT_UInt glyph_index, 1013 FT_ULong offset, 1014 FT_UInt byte_count ); 1015 1016 1017 /*************************************************************************/ 1018 /* */ 1019 /* <FuncType> */ 1020 /* TT_Loader_ReadGlyphFunc */ 1021 /* */ 1022 /* <Description> */ 1023 /* Reads one glyph element (its header, a simple glyph, or a */ 1024 /* composite) from the loader's current stream frame. */ 1025 /* */ 1026 /* <Input> */ 1027 /* loader :: The current TrueType glyph loader object. */ 1028 /* */ 1029 /* <Return> */ 1030 /* FreeType error code. 0 means success. */ 1031 /* */ 1032 typedef FT_Error 1033 (*TT_Loader_ReadGlyphFunc)( TT_Loader loader ); 1034 1035 1036 /*************************************************************************/ 1037 /* */ 1038 /* <FuncType> */ 1039 /* TT_Loader_EndGlyphFunc */ 1040 /* */ 1041 /* <Description> */ 1042 /* Closes the current loader stream frame for the glyph. */ 1043 /* */ 1044 /* <Input> */ 1045 /* loader :: The current TrueType glyph loader object. */ 1046 /* */ 1047 typedef void 1048 (*TT_Loader_EndGlyphFunc)( TT_Loader loader ); 1049 1050 1051 typedef enum TT_SbitTableType_ 1052 { 1053 TT_SBIT_TABLE_TYPE_NONE = 0, 1054 TT_SBIT_TABLE_TYPE_EBLC, /* `EBLC' (Microsoft), */ 1055 /* `bloc' (Apple) */ 1056 TT_SBIT_TABLE_TYPE_CBLC, /* `CBLC' (Google) */ 1057 TT_SBIT_TABLE_TYPE_SBIX, /* `sbix' (Apple) */ 1058 1059 /* do not remove */ 1060 TT_SBIT_TABLE_TYPE_MAX 1061 1062 } TT_SbitTableType; 1063 1064 1065 /*************************************************************************/ 1066 /* */ 1067 /* TrueType Face Type */ 1068 /* */ 1069 /* <Struct> */ 1070 /* TT_Face */ 1071 /* */ 1072 /* <Description> */ 1073 /* The TrueType face class. These objects model the resolution and */ 1074 /* point-size independent data found in a TrueType font file. */ 1075 /* */ 1076 /* <Fields> */ 1077 /* root :: The base FT_Face structure, managed by the */ 1078 /* base layer. */ 1079 /* */ 1080 /* ttc_header :: The TrueType collection header, used when */ 1081 /* the file is a `ttc' rather than a `ttf'. */ 1082 /* For ordinary font files, the field */ 1083 /* `ttc_header.count' is set to 0. */ 1084 /* */ 1085 /* format_tag :: The font format tag. */ 1086 /* */ 1087 /* num_tables :: The number of TrueType tables in this font */ 1088 /* file. */ 1089 /* */ 1090 /* dir_tables :: The directory of TrueType tables for this */ 1091 /* font file. */ 1092 /* */ 1093 /* header :: The font's font header (`head' table). */ 1094 /* Read on font opening. */ 1095 /* */ 1096 /* horizontal :: The font's horizontal header (`hhea' */ 1097 /* table). This field also contains the */ 1098 /* associated horizontal metrics table */ 1099 /* (`hmtx'). */ 1100 /* */ 1101 /* max_profile :: The font's maximum profile table. Read on */ 1102 /* font opening. Note that some maximum */ 1103 /* values cannot be taken directly from this */ 1104 /* table. We thus define additional fields */ 1105 /* below to hold the computed maxima. */ 1106 /* */ 1107 /* vertical_info :: A boolean which is set when the font file */ 1108 /* contains vertical metrics. If not, the */ 1109 /* value of the `vertical' field is */ 1110 /* undefined. */ 1111 /* */ 1112 /* vertical :: The font's vertical header (`vhea' table). */ 1113 /* This field also contains the associated */ 1114 /* vertical metrics table (`vmtx'), if found. */ 1115 /* IMPORTANT: The contents of this field is */ 1116 /* undefined if the `verticalInfo' field is */ 1117 /* unset. */ 1118 /* */ 1119 /* num_names :: The number of name records within this */ 1120 /* TrueType font. */ 1121 /* */ 1122 /* name_table :: The table of name records (`name'). */ 1123 /* */ 1124 /* os2 :: The font's OS/2 table (`OS/2'). */ 1125 /* */ 1126 /* postscript :: The font's PostScript table (`post' */ 1127 /* table). The PostScript glyph names are */ 1128 /* not loaded by the driver on face opening. */ 1129 /* See the `ttpost' module for more details. */ 1130 /* */ 1131 /* cmap_table :: Address of the face's `cmap' SFNT table */ 1132 /* in memory (it's an extracted frame). */ 1133 /* */ 1134 /* cmap_size :: The size in bytes of the `cmap_table' */ 1135 /* described above. */ 1136 /* */ 1137 /* goto_table :: A function called by each TrueType table */ 1138 /* loader to position a stream's cursor to */ 1139 /* the start of a given table according to */ 1140 /* its tag. It defaults to TT_Goto_Face but */ 1141 /* can be different for strange formats (e.g. */ 1142 /* Type 42). */ 1143 /* */ 1144 /* access_glyph_frame :: A function used to access the frame of a */ 1145 /* given glyph within the face's font file. */ 1146 /* */ 1147 /* forget_glyph_frame :: A function used to forget the frame of a */ 1148 /* given glyph when all data has been loaded. */ 1149 /* */ 1150 /* read_glyph_header :: A function used to read a glyph header. */ 1151 /* It must be called between an `access' and */ 1152 /* `forget'. */ 1153 /* */ 1154 /* read_simple_glyph :: A function used to read a simple glyph. */ 1155 /* It must be called after the header was */ 1156 /* read, and before the `forget'. */ 1157 /* */ 1158 /* read_composite_glyph :: A function used to read a composite glyph. */ 1159 /* It must be called after the header was */ 1160 /* read, and before the `forget'. */ 1161 /* */ 1162 /* sfnt :: A pointer to the SFNT service. */ 1163 /* */ 1164 /* psnames :: A pointer to the PostScript names service. */ 1165 /* */ 1166 /* hdmx :: The face's horizontal device metrics */ 1167 /* (`hdmx' table). This table is optional in */ 1168 /* TrueType/OpenType fonts. */ 1169 /* */ 1170 /* gasp :: The grid-fitting and scaling properties */ 1171 /* table (`gasp'). This table is optional in */ 1172 /* TrueType/OpenType fonts. */ 1173 /* */ 1174 /* pclt :: The `pclt' SFNT table. */ 1175 /* */ 1176 /* num_sbit_scales :: The number of sbit scales for this font. */ 1177 /* */ 1178 /* sbit_scales :: Array of sbit scales embedded in this */ 1179 /* font. This table is optional in a */ 1180 /* TrueType/OpenType font. */ 1181 /* */ 1182 /* postscript_names :: A table used to store the Postscript names */ 1183 /* of the glyphs for this font. See the */ 1184 /* file `ttconfig.h' for comments on the */ 1185 /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ 1186 /* */ 1187 /* num_locations :: The number of glyph locations in this */ 1188 /* TrueType file. This should be */ 1189 /* identical to the number of glyphs. */ 1190 /* Ignored for Type 2 fonts. */ 1191 /* */ 1192 /* glyph_locations :: An array of longs. These are offsets to */ 1193 /* glyph data within the `glyf' table. */ 1194 /* Ignored for Type 2 font faces. */ 1195 /* */ 1196 /* glyf_len :: The length of the `glyf' table. Needed */ 1197 /* for malformed `loca' tables. */ 1198 /* */ 1199 /* font_program_size :: Size in bytecodes of the face's font */ 1200 /* program. 0 if none defined. Ignored for */ 1201 /* Type 2 fonts. */ 1202 /* */ 1203 /* font_program :: The face's font program (bytecode stream) */ 1204 /* executed at load time, also used during */ 1205 /* glyph rendering. Comes from the `fpgm' */ 1206 /* table. Ignored for Type 2 font fonts. */ 1207 /* */ 1208 /* cvt_program_size :: The size in bytecodes of the face's cvt */ 1209 /* program. Ignored for Type 2 fonts. */ 1210 /* */ 1211 /* cvt_program :: The face's cvt program (bytecode stream) */ 1212 /* executed each time an instance/size is */ 1213 /* changed/reset. Comes from the `prep' */ 1214 /* table. Ignored for Type 2 fonts. */ 1215 /* */ 1216 /* cvt_size :: Size of the control value table (in */ 1217 /* entries). Ignored for Type 2 fonts. */ 1218 /* */ 1219 /* cvt :: The face's original control value table. */ 1220 /* Coordinates are expressed in unscaled font */ 1221 /* units. Comes from the `cvt ' table. */ 1222 /* Ignored for Type 2 fonts. */ 1223 /* */ 1224 /* num_kern_pairs :: The number of kerning pairs present in the */ 1225 /* font file. The engine only loads the */ 1226 /* first horizontal format 0 kern table it */ 1227 /* finds in the font file. Ignored for */ 1228 /* Type 2 fonts. */ 1229 /* */ 1230 /* kern_table_index :: The index of the kerning table in the font */ 1231 /* kerning directory. Ignored for Type 2 */ 1232 /* fonts. */ 1233 /* */ 1234 /* interpreter :: A pointer to the TrueType bytecode */ 1235 /* interpreters field is also used to hook */ 1236 /* the debugger in `ttdebug'. */ 1237 /* */ 1238 /* unpatented_hinting :: If true, use only unpatented methods in */ 1239 /* the bytecode interpreter. */ 1240 /* */ 1241 /* doblend :: A boolean which is set if the font should */ 1242 /* be blended (this is for GX var). */ 1243 /* */ 1244 /* blend :: Contains the data needed to control GX */ 1245 /* variation tables (rather like Multiple */ 1246 /* Master data). */ 1247 /* */ 1248 /* extra :: Reserved for third-party font drivers. */ 1249 /* */ 1250 /* postscript_name :: The PS name of the font. Used by the */ 1251 /* postscript name service. */ 1252 /* */ 1253 typedef struct TT_FaceRec_ 1254 { 1255 FT_FaceRec root; 1256 1257 TTC_HeaderRec ttc_header; 1258 1259 FT_ULong format_tag; 1260 FT_UShort num_tables; 1261 TT_Table dir_tables; 1262 1263 TT_Header header; /* TrueType header table */ 1264 TT_HoriHeader horizontal; /* TrueType horizontal header */ 1265 1266 TT_MaxProfile max_profile; 1267 1268 FT_Bool vertical_info; 1269 TT_VertHeader vertical; /* TT Vertical header, if present */ 1270 1271 FT_UShort num_names; /* number of name records */ 1272 TT_NameTableRec name_table; /* name table */ 1273 1274 TT_OS2 os2; /* TrueType OS/2 table */ 1275 TT_Postscript postscript; /* TrueType Postscript table */ 1276 1277 FT_Byte* cmap_table; /* extracted `cmap' table */ 1278 FT_ULong cmap_size; 1279 1280 TT_Loader_GotoTableFunc goto_table; 1281 1282 TT_Loader_StartGlyphFunc access_glyph_frame; 1283 TT_Loader_EndGlyphFunc forget_glyph_frame; 1284 TT_Loader_ReadGlyphFunc read_glyph_header; 1285 TT_Loader_ReadGlyphFunc read_simple_glyph; 1286 TT_Loader_ReadGlyphFunc read_composite_glyph; 1287 1288 /* a typeless pointer to the SFNT_Interface table used to load */ 1289 /* the basic TrueType tables in the face object */ 1290 void* sfnt; 1291 1292 /* a typeless pointer to the FT_Service_PsCMapsRec table used to */ 1293 /* handle glyph names <-> unicode & Mac values */ 1294 void* psnames; 1295 1296 1297 /***********************************************************************/ 1298 /* */ 1299 /* Optional TrueType/OpenType tables */ 1300 /* */ 1301 /***********************************************************************/ 1302 1303 /* grid-fitting and scaling table */ 1304 TT_GaspRec gasp; /* the `gasp' table */ 1305 1306 /* PCL 5 table */ 1307 TT_PCLT pclt; 1308 1309 /* embedded bitmaps support */ 1310 FT_ULong num_sbit_scales; 1311 TT_SBit_Scale sbit_scales; 1312 1313 /* postscript names table */ 1314 TT_Post_NamesRec postscript_names; 1315 1316 1317 /***********************************************************************/ 1318 /* */ 1319 /* TrueType-specific fields (ignored by the OTF-Type2 driver) */ 1320 /* */ 1321 /***********************************************************************/ 1322 1323 /* the font program, if any */ 1324 FT_ULong font_program_size; 1325 FT_Byte* font_program; 1326 1327 /* the cvt program, if any */ 1328 FT_ULong cvt_program_size; 1329 FT_Byte* cvt_program; 1330 1331 /* the original, unscaled, control value table */ 1332 FT_ULong cvt_size; 1333 FT_Short* cvt; 1334 1335 /* A pointer to the bytecode interpreter to use. This is also */ 1336 /* used to hook the debugger for the `ttdebug' utility. */ 1337 TT_Interpreter interpreter; 1338 1339#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING 1340 /* Use unpatented hinting only. */ 1341 FT_Bool unpatented_hinting; 1342#endif 1343 1344 /***********************************************************************/ 1345 /* */ 1346 /* Other tables or fields. This is used by derivative formats like */ 1347 /* OpenType. */ 1348 /* */ 1349 /***********************************************************************/ 1350 1351 FT_Generic extra; 1352 1353 const char* postscript_name; 1354 1355 FT_ULong glyf_len; 1356 1357#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 1358 FT_Bool doblend; 1359 GX_Blend blend; 1360#endif 1361 1362 /* since version 2.2 */ 1363 1364 FT_Byte* horz_metrics; 1365 FT_ULong horz_metrics_size; 1366 1367 FT_Byte* vert_metrics; 1368 FT_ULong vert_metrics_size; 1369 1370 FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */ 1371 FT_Byte* glyph_locations; 1372 1373 FT_Byte* hdmx_table; 1374 FT_ULong hdmx_table_size; 1375 FT_UInt hdmx_record_count; 1376 FT_ULong hdmx_record_size; 1377 FT_Byte* hdmx_record_sizes; 1378 1379 FT_Byte* sbit_table; 1380 FT_ULong sbit_table_size; 1381 TT_SbitTableType sbit_table_type; 1382 FT_UInt sbit_num_strikes; 1383 1384 FT_Byte* kern_table; 1385 FT_ULong kern_table_size; 1386 FT_UInt num_kern_tables; 1387 FT_UInt32 kern_avail_bits; 1388 FT_UInt32 kern_order_bits; 1389 1390#ifdef TT_CONFIG_OPTION_BDF 1391 TT_BDFRec bdf; 1392#endif /* TT_CONFIG_OPTION_BDF */ 1393 1394 /* since 2.3.0 */ 1395 FT_ULong horz_metrics_offset; 1396 FT_ULong vert_metrics_offset; 1397 1398#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING 1399 /* since 2.4.12 */ 1400 FT_ULong sph_found_func_flags; /* special functions found */ 1401 /* for this face */ 1402 FT_Bool sph_compatibility_mode; 1403#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ 1404 1405 } TT_FaceRec; 1406 1407 1408 /*************************************************************************/ 1409 /* */ 1410 /* <Struct> */ 1411 /* TT_GlyphZoneRec */ 1412 /* */ 1413 /* <Description> */ 1414 /* A glyph zone is used to load, scale and hint glyph outline */ 1415 /* coordinates. */ 1416 /* */ 1417 /* <Fields> */ 1418 /* memory :: A handle to the memory manager. */ 1419 /* */ 1420 /* max_points :: The maximum size in points of the zone. */ 1421 /* */ 1422 /* max_contours :: Max size in links contours of the zone. */ 1423 /* */ 1424 /* n_points :: The current number of points in the zone. */ 1425 /* */ 1426 /* n_contours :: The current number of contours in the zone. */ 1427 /* */ 1428 /* org :: The original glyph coordinates (font */ 1429 /* units/scaled). */ 1430 /* */ 1431 /* cur :: The current glyph coordinates (scaled/hinted). */ 1432 /* */ 1433 /* tags :: The point control tags. */ 1434 /* */ 1435 /* contours :: The contours end points. */ 1436 /* */ 1437 /* first_point :: Offset of the current subglyph's first point. */ 1438 /* */ 1439 typedef struct TT_GlyphZoneRec_ 1440 { 1441 FT_Memory memory; 1442 FT_UShort max_points; 1443 FT_UShort max_contours; 1444 FT_UShort n_points; /* number of points in zone */ 1445 FT_Short n_contours; /* number of contours */ 1446 1447 FT_Vector* org; /* original point coordinates */ 1448 FT_Vector* cur; /* current point coordinates */ 1449 FT_Vector* orus; /* original (unscaled) point coordinates */ 1450 1451 FT_Byte* tags; /* current touch flags */ 1452 FT_UShort* contours; /* contour end points */ 1453 1454 FT_UShort first_point; /* offset of first (#0) point */ 1455 1456 } TT_GlyphZoneRec, *TT_GlyphZone; 1457 1458 1459 /* handle to execution context */ 1460 typedef struct TT_ExecContextRec_* TT_ExecContext; 1461 1462 /* glyph loader structure */ 1463 typedef struct TT_LoaderRec_ 1464 { 1465 FT_Face face; 1466 FT_Size size; 1467 FT_GlyphSlot glyph; 1468 FT_GlyphLoader gloader; 1469 1470 FT_ULong load_flags; 1471 FT_UInt glyph_index; 1472 1473 FT_Stream stream; 1474 FT_Int byte_len; 1475 1476 FT_Short n_contours; 1477 FT_BBox bbox; 1478 FT_Int left_bearing; 1479 FT_Int advance; 1480 FT_Int linear; 1481 FT_Bool linear_def; 1482 FT_Vector pp1; 1483 FT_Vector pp2; 1484 1485 FT_ULong glyf_offset; 1486 1487 /* the zone where we load our glyphs */ 1488 TT_GlyphZoneRec base; 1489 TT_GlyphZoneRec zone; 1490 1491 TT_ExecContext exec; 1492 FT_Byte* instructions; 1493 FT_ULong ins_pos; 1494 1495 /* for possible extensibility in other formats */ 1496 void* other; 1497 1498 /* since version 2.1.8 */ 1499 FT_Int top_bearing; 1500 FT_Int vadvance; 1501 FT_Vector pp3; 1502 FT_Vector pp4; 1503 1504 /* since version 2.2.1 */ 1505 FT_Byte* cursor; 1506 FT_Byte* limit; 1507 1508 } TT_LoaderRec; 1509 1510 1511FT_END_HEADER 1512 1513#endif /* __TTTYPES_H__ */ 1514 1515 1516/* END */ 1517