1 /***************************************************************************/ 2 /* */ 3 /* tttypes.h */ 4 /* */ 5 /* Basic SFNT/TrueType type definitions and interface (specification */ 6 /* only). */ 7 /* */ 8 /* Copyright 1996-2018 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 33 FT_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 /* https://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 :: Uncompressed 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_NameRec */ 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_NameRec_ 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_NameRec, *TT_Name; 285 286 287 /*************************************************************************/ 288 /* */ 289 /* <Struct> */ 290 /* TT_LangTagRec */ 291 /* */ 292 /* <Description> */ 293 /* A structure modeling language tag records in SFNT `name' tables, */ 294 /* introduced in OpenType version 1.6. */ 295 /* */ 296 /* <Fields> */ 297 /* stringLength :: The length of the string in bytes. */ 298 /* */ 299 /* stringOffset :: The offset to the string in the `name' table. */ 300 /* */ 301 /* string :: A pointer to the string's bytes. Note that these */ 302 /* are UTF-16BE encoded characters. */ 303 /* */ 304 typedef struct TT_LangTagRec_ 305 { 306 FT_UShort stringLength; 307 FT_ULong stringOffset; 308 309 /* this last field is not defined in the spec */ 310 /* but used by the FreeType engine */ 311 312 FT_Byte* string; 313 314 } TT_LangTagRec, *TT_LangTag; 315 316 317 /*************************************************************************/ 318 /* */ 319 /* <Struct> */ 320 /* TT_NameTableRec */ 321 /* */ 322 /* <Description> */ 323 /* A structure modeling the TrueType name table. */ 324 /* */ 325 /* <Fields> */ 326 /* format :: The format of the name table. */ 327 /* */ 328 /* numNameRecords :: The number of names in table. */ 329 /* */ 330 /* storageOffset :: The offset of the name table in the `name' */ 331 /* TrueType table. */ 332 /* */ 333 /* names :: An array of name records. */ 334 /* */ 335 /* numLangTagRecords :: The number of language tags in table. */ 336 /* */ 337 /* langTags :: An array of language tag records. */ 338 /* */ 339 /* stream :: The file's input stream. */ 340 /* */ 341 typedef struct TT_NameTableRec_ 342 { 343 FT_UShort format; 344 FT_UInt numNameRecords; 345 FT_UInt storageOffset; 346 TT_NameRec* names; 347 FT_UInt numLangTagRecords; 348 TT_LangTagRec* langTags; 349 FT_Stream stream; 350 351 } TT_NameTableRec, *TT_NameTable; 352 353 354 /*************************************************************************/ 355 /*************************************************************************/ 356 /*************************************************************************/ 357 /*** ***/ 358 /*** ***/ 359 /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ 360 /*** ***/ 361 /*** ***/ 362 /*************************************************************************/ 363 /*************************************************************************/ 364 /*************************************************************************/ 365 366 367 /*************************************************************************/ 368 /* */ 369 /* <Struct> */ 370 /* TT_GaspRangeRec */ 371 /* */ 372 /* <Description> */ 373 /* A tiny structure used to model a gasp range according to the */ 374 /* TrueType specification. */ 375 /* */ 376 /* <Fields> */ 377 /* maxPPEM :: The maximum ppem value to which `gaspFlag' applies. */ 378 /* */ 379 /* gaspFlag :: A flag describing the grid-fitting and anti-aliasing */ 380 /* modes to be used. */ 381 /* */ 382 typedef struct TT_GaspRangeRec_ 383 { 384 FT_UShort maxPPEM; 385 FT_UShort gaspFlag; 386 387 } TT_GaspRangeRec, *TT_GaspRange; 388 389 390 #define TT_GASP_GRIDFIT 0x01 391 #define TT_GASP_DOGRAY 0x02 392 393 394 /*************************************************************************/ 395 /* */ 396 /* <Struct> */ 397 /* TT_GaspRec */ 398 /* */ 399 /* <Description> */ 400 /* A structure modeling the TrueType `gasp' table used to specify */ 401 /* grid-fitting and anti-aliasing behaviour. */ 402 /* */ 403 /* <Fields> */ 404 /* version :: The version number. */ 405 /* */ 406 /* numRanges :: The number of gasp ranges in table. */ 407 /* */ 408 /* gaspRanges :: An array of gasp ranges. */ 409 /* */ 410 typedef struct TT_Gasp_ 411 { 412 FT_UShort version; 413 FT_UShort numRanges; 414 TT_GaspRange gaspRanges; 415 416 } TT_GaspRec; 417 418 419 /*************************************************************************/ 420 /*************************************************************************/ 421 /*************************************************************************/ 422 /*** ***/ 423 /*** ***/ 424 /*** EMBEDDED BITMAPS SUPPORT ***/ 425 /*** ***/ 426 /*** ***/ 427 /*************************************************************************/ 428 /*************************************************************************/ 429 /*************************************************************************/ 430 431 432 /*************************************************************************/ 433 /* */ 434 /* <Struct> */ 435 /* TT_SBit_MetricsRec */ 436 /* */ 437 /* <Description> */ 438 /* A structure used to hold the big metrics of a given glyph bitmap */ 439 /* in a TrueType or OpenType font. These are usually found in the */ 440 /* `EBDT' (Microsoft) or `bloc' (Apple) table. */ 441 /* */ 442 /* <Fields> */ 443 /* height :: The glyph height in pixels. */ 444 /* */ 445 /* width :: The glyph width in pixels. */ 446 /* */ 447 /* horiBearingX :: The horizontal left bearing. */ 448 /* */ 449 /* horiBearingY :: The horizontal top bearing. */ 450 /* */ 451 /* horiAdvance :: The horizontal advance. */ 452 /* */ 453 /* vertBearingX :: The vertical left bearing. */ 454 /* */ 455 /* vertBearingY :: The vertical top bearing. */ 456 /* */ 457 /* vertAdvance :: The vertical advance. */ 458 /* */ 459 typedef struct TT_SBit_MetricsRec_ 460 { 461 FT_UShort height; 462 FT_UShort width; 463 464 FT_Short horiBearingX; 465 FT_Short horiBearingY; 466 FT_UShort horiAdvance; 467 468 FT_Short vertBearingX; 469 FT_Short vertBearingY; 470 FT_UShort vertAdvance; 471 472 } TT_SBit_MetricsRec, *TT_SBit_Metrics; 473 474 475 /*************************************************************************/ 476 /* */ 477 /* <Struct> */ 478 /* TT_SBit_SmallMetricsRec */ 479 /* */ 480 /* <Description> */ 481 /* A structure used to hold the small metrics of a given glyph bitmap */ 482 /* in a TrueType or OpenType font. These are usually found in the */ 483 /* `EBDT' (Microsoft) or the `bdat' (Apple) table. */ 484 /* */ 485 /* <Fields> */ 486 /* height :: The glyph height in pixels. */ 487 /* */ 488 /* width :: The glyph width in pixels. */ 489 /* */ 490 /* bearingX :: The left-side bearing. */ 491 /* */ 492 /* bearingY :: The top-side bearing. */ 493 /* */ 494 /* advance :: The advance width or height. */ 495 /* */ 496 typedef struct TT_SBit_Small_Metrics_ 497 { 498 FT_Byte height; 499 FT_Byte width; 500 501 FT_Char bearingX; 502 FT_Char bearingY; 503 FT_Byte advance; 504 505 } TT_SBit_SmallMetricsRec, *TT_SBit_SmallMetrics; 506 507 508 /*************************************************************************/ 509 /* */ 510 /* <Struct> */ 511 /* TT_SBit_LineMetricsRec */ 512 /* */ 513 /* <Description> */ 514 /* A structure used to describe the text line metrics of a given */ 515 /* bitmap strike, for either a horizontal or vertical layout. */ 516 /* */ 517 /* <Fields> */ 518 /* ascender :: The ascender in pixels. */ 519 /* */ 520 /* descender :: The descender in pixels. */ 521 /* */ 522 /* max_width :: The maximum glyph width in pixels. */ 523 /* */ 524 /* caret_slope_enumerator :: Rise of the caret slope, typically set */ 525 /* to 1 for non-italic fonts. */ 526 /* */ 527 /* caret_slope_denominator :: Rise of the caret slope, typically set */ 528 /* to 0 for non-italic fonts. */ 529 /* */ 530 /* caret_offset :: Offset in pixels to move the caret for */ 531 /* proper positioning. */ 532 /* */ 533 /* min_origin_SB :: Minimum of horiBearingX (resp. */ 534 /* vertBearingY). */ 535 /* min_advance_SB :: Minimum of */ 536 /* */ 537 /* horizontal advance - */ 538 /* ( horiBearingX + width ) */ 539 /* */ 540 /* resp. */ 541 /* */ 542 /* vertical advance - */ 543 /* ( vertBearingY + height ) */ 544 /* */ 545 /* max_before_BL :: Maximum of horiBearingY (resp. */ 546 /* vertBearingY). */ 547 /* */ 548 /* min_after_BL :: Minimum of */ 549 /* */ 550 /* horiBearingY - height */ 551 /* */ 552 /* resp. */ 553 /* */ 554 /* vertBearingX - width */ 555 /* */ 556 /* pads :: Unused (to make the size of the record */ 557 /* a multiple of 32 bits. */ 558 /* */ 559 typedef struct TT_SBit_LineMetricsRec_ 560 { 561 FT_Char ascender; 562 FT_Char descender; 563 FT_Byte max_width; 564 FT_Char caret_slope_numerator; 565 FT_Char caret_slope_denominator; 566 FT_Char caret_offset; 567 FT_Char min_origin_SB; 568 FT_Char min_advance_SB; 569 FT_Char max_before_BL; 570 FT_Char min_after_BL; 571 FT_Char pads[2]; 572 573 } TT_SBit_LineMetricsRec, *TT_SBit_LineMetrics; 574 575 576 /*************************************************************************/ 577 /* */ 578 /* <Struct> */ 579 /* TT_SBit_RangeRec */ 580 /* */ 581 /* <Description> */ 582 /* A TrueType/OpenType subIndexTable as defined in the `EBLC' */ 583 /* (Microsoft) or `bloc' (Apple) tables. */ 584 /* */ 585 /* <Fields> */ 586 /* first_glyph :: The first glyph index in the range. */ 587 /* */ 588 /* last_glyph :: The last glyph index in the range. */ 589 /* */ 590 /* index_format :: The format of index table. Valid values are 1 */ 591 /* to 5. */ 592 /* */ 593 /* image_format :: The format of `EBDT' image data. */ 594 /* */ 595 /* image_offset :: The offset to image data in `EBDT'. */ 596 /* */ 597 /* image_size :: For index formats 2 and 5. This is the size in */ 598 /* bytes of each glyph bitmap. */ 599 /* */ 600 /* big_metrics :: For index formats 2 and 5. This is the big */ 601 /* metrics for each glyph bitmap. */ 602 /* */ 603 /* num_glyphs :: For index formats 4 and 5. This is the number of */ 604 /* glyphs in the code array. */ 605 /* */ 606 /* glyph_offsets :: For index formats 1 and 3. */ 607 /* */ 608 /* glyph_codes :: For index formats 4 and 5. */ 609 /* */ 610 /* table_offset :: The offset of the index table in the `EBLC' */ 611 /* table. Only used during strike loading. */ 612 /* */ 613 typedef struct TT_SBit_RangeRec_ 614 { 615 FT_UShort first_glyph; 616 FT_UShort last_glyph; 617 618 FT_UShort index_format; 619 FT_UShort image_format; 620 FT_ULong image_offset; 621 622 FT_ULong image_size; 623 TT_SBit_MetricsRec metrics; 624 FT_ULong num_glyphs; 625 626 FT_ULong* glyph_offsets; 627 FT_UShort* glyph_codes; 628 629 FT_ULong table_offset; 630 631 } TT_SBit_RangeRec, *TT_SBit_Range; 632 633 634 /*************************************************************************/ 635 /* */ 636 /* <Struct> */ 637 /* TT_SBit_StrikeRec */ 638 /* */ 639 /* <Description> */ 640 /* A structure used describe a given bitmap strike in the `EBLC' */ 641 /* (Microsoft) or `bloc' (Apple) tables. */ 642 /* */ 643 /* <Fields> */ 644 /* num_index_ranges :: The number of index ranges. */ 645 /* */ 646 /* index_ranges :: An array of glyph index ranges. */ 647 /* */ 648 /* color_ref :: Unused. `color_ref' is put in for future */ 649 /* enhancements, but these fields are already */ 650 /* in use by other platforms (e.g. Newton). */ 651 /* For details, please see */ 652 /* */ 653 /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bloc.html */ 654 /* */ 655 /* hori :: The line metrics for horizontal layouts. */ 656 /* */ 657 /* vert :: The line metrics for vertical layouts. */ 658 /* */ 659 /* start_glyph :: The lowest glyph index for this strike. */ 660 /* */ 661 /* end_glyph :: The highest glyph index for this strike. */ 662 /* */ 663 /* x_ppem :: The number of horizontal pixels per EM. */ 664 /* */ 665 /* y_ppem :: The number of vertical pixels per EM. */ 666 /* */ 667 /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */ 668 /* and 8. */ 669 /* */ 670 /* flags :: Is this a vertical or horizontal strike? For */ 671 /* details, please see */ 672 /* */ 673 /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bloc.html */ 674 /* */ 675 typedef struct TT_SBit_StrikeRec_ 676 { 677 FT_Int num_ranges; 678 TT_SBit_Range sbit_ranges; 679 FT_ULong ranges_offset; 680 681 FT_ULong color_ref; 682 683 TT_SBit_LineMetricsRec hori; 684 TT_SBit_LineMetricsRec vert; 685 686 FT_UShort start_glyph; 687 FT_UShort end_glyph; 688 689 FT_Byte x_ppem; 690 FT_Byte y_ppem; 691 692 FT_Byte bit_depth; 693 FT_Char flags; 694 695 } TT_SBit_StrikeRec, *TT_SBit_Strike; 696 697 698 /*************************************************************************/ 699 /* */ 700 /* <Struct> */ 701 /* TT_SBit_ComponentRec */ 702 /* */ 703 /* <Description> */ 704 /* A simple structure to describe a compound sbit element. */ 705 /* */ 706 /* <Fields> */ 707 /* glyph_code :: The element's glyph index. */ 708 /* */ 709 /* x_offset :: The element's left bearing. */ 710 /* */ 711 /* y_offset :: The element's top bearing. */ 712 /* */ 713 typedef struct TT_SBit_ComponentRec_ 714 { 715 FT_UShort glyph_code; 716 FT_Char x_offset; 717 FT_Char y_offset; 718 719 } TT_SBit_ComponentRec, *TT_SBit_Component; 720 721 722 /*************************************************************************/ 723 /* */ 724 /* <Struct> */ 725 /* TT_SBit_ScaleRec */ 726 /* */ 727 /* <Description> */ 728 /* A structure used describe a given bitmap scaling table, as defined */ 729 /* in the `EBSC' table. */ 730 /* */ 731 /* <Fields> */ 732 /* hori :: The horizontal line metrics. */ 733 /* */ 734 /* vert :: The vertical line metrics. */ 735 /* */ 736 /* x_ppem :: The number of horizontal pixels per EM. */ 737 /* */ 738 /* y_ppem :: The number of vertical pixels per EM. */ 739 /* */ 740 /* x_ppem_substitute :: Substitution x_ppem value. */ 741 /* */ 742 /* y_ppem_substitute :: Substitution y_ppem value. */ 743 /* */ 744 typedef struct TT_SBit_ScaleRec_ 745 { 746 TT_SBit_LineMetricsRec hori; 747 TT_SBit_LineMetricsRec vert; 748 749 FT_Byte x_ppem; 750 FT_Byte y_ppem; 751 752 FT_Byte x_ppem_substitute; 753 FT_Byte y_ppem_substitute; 754 755 } TT_SBit_ScaleRec, *TT_SBit_Scale; 756 757 758 /*************************************************************************/ 759 /*************************************************************************/ 760 /*************************************************************************/ 761 /*** ***/ 762 /*** ***/ 763 /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/ 764 /*** ***/ 765 /*** ***/ 766 /*************************************************************************/ 767 /*************************************************************************/ 768 /*************************************************************************/ 769 770 771 /*************************************************************************/ 772 /* */ 773 /* <Struct> */ 774 /* TT_Post_20Rec */ 775 /* */ 776 /* <Description> */ 777 /* Postscript names sub-table, format 2.0. Stores the PS name of */ 778 /* each glyph in the font face. */ 779 /* */ 780 /* <Fields> */ 781 /* num_glyphs :: The number of named glyphs in the table. */ 782 /* */ 783 /* num_names :: The number of PS names stored in the table. */ 784 /* */ 785 /* glyph_indices :: The indices of the glyphs in the names arrays. */ 786 /* */ 787 /* glyph_names :: The PS names not in Mac Encoding. */ 788 /* */ 789 typedef struct TT_Post_20Rec_ 790 { 791 FT_UShort num_glyphs; 792 FT_UShort num_names; 793 FT_UShort* glyph_indices; 794 FT_Char** glyph_names; 795 796 } TT_Post_20Rec, *TT_Post_20; 797 798 799 /*************************************************************************/ 800 /* */ 801 /* <Struct> */ 802 /* TT_Post_25Rec */ 803 /* */ 804 /* <Description> */ 805 /* Postscript names sub-table, format 2.5. Stores the PS name of */ 806 /* each glyph in the font face. */ 807 /* */ 808 /* <Fields> */ 809 /* num_glyphs :: The number of glyphs in the table. */ 810 /* */ 811 /* offsets :: An array of signed offsets in a normal Mac */ 812 /* Postscript name encoding. */ 813 /* */ 814 typedef struct TT_Post_25_ 815 { 816 FT_UShort num_glyphs; 817 FT_Char* offsets; 818 819 } TT_Post_25Rec, *TT_Post_25; 820 821 822 /*************************************************************************/ 823 /* */ 824 /* <Struct> */ 825 /* TT_Post_NamesRec */ 826 /* */ 827 /* <Description> */ 828 /* Postscript names table, either format 2.0 or 2.5. */ 829 /* */ 830 /* <Fields> */ 831 /* loaded :: A flag to indicate whether the PS names are loaded. */ 832 /* */ 833 /* format_20 :: The sub-table used for format 2.0. */ 834 /* */ 835 /* format_25 :: The sub-table used for format 2.5. */ 836 /* */ 837 typedef struct TT_Post_NamesRec_ 838 { 839 FT_Bool loaded; 840 841 union 842 { 843 TT_Post_20Rec format_20; 844 TT_Post_25Rec format_25; 845 846 } names; 847 848 } TT_Post_NamesRec, *TT_Post_Names; 849 850 851 /*************************************************************************/ 852 /*************************************************************************/ 853 /*************************************************************************/ 854 /*** ***/ 855 /*** ***/ 856 /*** GX VARIATION TABLE SUPPORT ***/ 857 /*** ***/ 858 /*** ***/ 859 /*************************************************************************/ 860 /*************************************************************************/ 861 /*************************************************************************/ 862 863 864 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 865 typedef struct GX_BlendRec_ *GX_Blend; 866 #endif 867 868 /*************************************************************************/ 869 /*************************************************************************/ 870 /*************************************************************************/ 871 /*** ***/ 872 /*** ***/ 873 /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/ 874 /*** ***/ 875 /*** ***/ 876 /*************************************************************************/ 877 /*************************************************************************/ 878 /*************************************************************************/ 879 880 /* 881 * These types are used to support a `BDF ' table that isn't part of the 882 * official TrueType specification. It is mainly used in SFNT-based 883 * bitmap fonts that were generated from a set of BDF fonts. 884 * 885 * The format of the table is as follows. 886 * 887 * USHORT version `BDF ' table version number, should be 0x0001. 888 * USHORT strikeCount Number of strikes (bitmap sizes) in this table. 889 * ULONG stringTable Offset (from start of BDF table) to string 890 * table. 891 * 892 * This is followed by an array of `strikeCount' descriptors, having the 893 * following format. 894 * 895 * USHORT ppem Vertical pixels per EM for this strike. 896 * USHORT numItems Number of items for this strike (properties and 897 * atoms). Maximum is 255. 898 * 899 * This array in turn is followed by `strikeCount' value sets. Each 900 * `value set' is an array of `numItems' items with the following format. 901 * 902 * ULONG item_name Offset in string table to item name. 903 * USHORT item_type The item type. Possible values are 904 * 0 => string (e.g., COMMENT) 905 * 1 => atom (e.g., FONT or even SIZE) 906 * 2 => int32 907 * 3 => uint32 908 * 0x10 => A flag to indicate a properties. This 909 * is ORed with the above values. 910 * ULONG item_value For strings => Offset into string table without 911 * the corresponding double quotes. 912 * For atoms => Offset into string table. 913 * For integers => Direct value. 914 * 915 * All strings in the string table consist of bytes and are 916 * zero-terminated. 917 * 918 */ 919 920 #ifdef TT_CONFIG_OPTION_BDF 921 922 typedef struct TT_BDFRec_ 923 { 924 FT_Byte* table; 925 FT_Byte* table_end; 926 FT_Byte* strings; 927 FT_ULong strings_size; 928 FT_UInt num_strikes; 929 FT_Bool loaded; 930 931 } TT_BDFRec, *TT_BDF; 932 933 #endif /* TT_CONFIG_OPTION_BDF */ 934 935 /*************************************************************************/ 936 /*************************************************************************/ 937 /*************************************************************************/ 938 /*** ***/ 939 /*** ***/ 940 /*** ORIGINAL TT_FACE CLASS DEFINITION ***/ 941 /*** ***/ 942 /*** ***/ 943 /*************************************************************************/ 944 /*************************************************************************/ 945 /*************************************************************************/ 946 947 948 /*************************************************************************/ 949 /* */ 950 /* This structure/class is defined here because it is common to the */ 951 /* following formats: TTF, OpenType-TT, and OpenType-CFF. */ 952 /* */ 953 /* Note, however, that the classes TT_Size and TT_GlyphSlot are not */ 954 /* shared between font drivers, and are thus defined in `ttobjs.h'. */ 955 /* */ 956 /*************************************************************************/ 957 958 959 /*************************************************************************/ 960 /* */ 961 /* <Type> */ 962 /* TT_Face */ 963 /* */ 964 /* <Description> */ 965 /* A handle to a TrueType face/font object. A TT_Face encapsulates */ 966 /* the resolution and scaling independent parts of a TrueType font */ 967 /* resource. */ 968 /* */ 969 /* <Note> */ 970 /* The TT_Face structure is also used as a `parent class' for the */ 971 /* OpenType-CFF class (T2_Face). */ 972 /* */ 973 typedef struct TT_FaceRec_* TT_Face; 974 975 976 /* a function type used for the truetype bytecode interpreter hooks */ 977 typedef FT_Error 978 (*TT_Interpreter)( void* exec_context ); 979 980 /* forward declaration */ 981 typedef struct TT_LoaderRec_* TT_Loader; 982 983 984 /*************************************************************************/ 985 /* */ 986 /* <FuncType> */ 987 /* TT_Loader_GotoTableFunc */ 988 /* */ 989 /* <Description> */ 990 /* Seeks a stream to the start of a given TrueType table. */ 991 /* */ 992 /* <Input> */ 993 /* face :: A handle to the target face object. */ 994 /* */ 995 /* tag :: A 4-byte tag used to name the table. */ 996 /* */ 997 /* stream :: The input stream. */ 998 /* */ 999 /* <Output> */ 1000 /* length :: The length of the table in bytes. Set to 0 if not */ 1001 /* needed. */ 1002 /* */ 1003 /* <Return> */ 1004 /* FreeType error code. 0 means success. */ 1005 /* */ 1006 /* <Note> */ 1007 /* The stream cursor must be at the font file's origin. */ 1008 /* */ 1009 typedef FT_Error 1010 (*TT_Loader_GotoTableFunc)( TT_Face face, 1011 FT_ULong tag, 1012 FT_Stream stream, 1013 FT_ULong* length ); 1014 1015 1016 /*************************************************************************/ 1017 /* */ 1018 /* <FuncType> */ 1019 /* TT_Loader_StartGlyphFunc */ 1020 /* */ 1021 /* <Description> */ 1022 /* Seeks a stream to the start of a given glyph element, and opens a */ 1023 /* frame for it. */ 1024 /* */ 1025 /* <Input> */ 1026 /* loader :: The current TrueType glyph loader object. */ 1027 /* */ 1028 /* glyph index :: The index of the glyph to access. */ 1029 /* */ 1030 /* offset :: The offset of the glyph according to the */ 1031 /* `locations' table. */ 1032 /* */ 1033 /* byte_count :: The size of the frame in bytes. */ 1034 /* */ 1035 /* <Return> */ 1036 /* FreeType error code. 0 means success. */ 1037 /* */ 1038 /* <Note> */ 1039 /* This function is normally equivalent to FT_STREAM_SEEK(offset) */ 1040 /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */ 1041 /* but alternative formats (e.g. compressed ones) might use something */ 1042 /* different. */ 1043 /* */ 1044 typedef FT_Error 1045 (*TT_Loader_StartGlyphFunc)( TT_Loader loader, 1046 FT_UInt glyph_index, 1047 FT_ULong offset, 1048 FT_UInt byte_count ); 1049 1050 1051 /*************************************************************************/ 1052 /* */ 1053 /* <FuncType> */ 1054 /* TT_Loader_ReadGlyphFunc */ 1055 /* */ 1056 /* <Description> */ 1057 /* Reads one glyph element (its header, a simple glyph, or a */ 1058 /* composite) from the loader's current stream frame. */ 1059 /* */ 1060 /* <Input> */ 1061 /* loader :: The current TrueType glyph loader object. */ 1062 /* */ 1063 /* <Return> */ 1064 /* FreeType error code. 0 means success. */ 1065 /* */ 1066 typedef FT_Error 1067 (*TT_Loader_ReadGlyphFunc)( TT_Loader loader ); 1068 1069 1070 /*************************************************************************/ 1071 /* */ 1072 /* <FuncType> */ 1073 /* TT_Loader_EndGlyphFunc */ 1074 /* */ 1075 /* <Description> */ 1076 /* Closes the current loader stream frame for the glyph. */ 1077 /* */ 1078 /* <Input> */ 1079 /* loader :: The current TrueType glyph loader object. */ 1080 /* */ 1081 typedef void 1082 (*TT_Loader_EndGlyphFunc)( TT_Loader loader ); 1083 1084 1085 typedef enum TT_SbitTableType_ 1086 { 1087 TT_SBIT_TABLE_TYPE_NONE = 0, 1088 TT_SBIT_TABLE_TYPE_EBLC, /* `EBLC' (Microsoft), */ 1089 /* `bloc' (Apple) */ 1090 TT_SBIT_TABLE_TYPE_CBLC, /* `CBLC' (Google) */ 1091 TT_SBIT_TABLE_TYPE_SBIX, /* `sbix' (Apple) */ 1092 1093 /* do not remove */ 1094 TT_SBIT_TABLE_TYPE_MAX 1095 1096 } TT_SbitTableType; 1097 1098 1099 /* OpenType 1.8 brings new tables for variation font support; */ 1100 /* to make the old MM and GX fonts still work we need to check */ 1101 /* the presence (and validity) of the functionality provided */ 1102 /* by those tables. The following flag macros are for the */ 1103 /* field `variation_support'. */ 1104 /* */ 1105 /* Note that `fvar' gets checked immediately at font loading, */ 1106 /* while the other features are only loaded if MM support is */ 1107 /* actually requested. */ 1108 1109 /* FVAR */ 1110 #define TT_FACE_FLAG_VAR_FVAR ( 1 << 0 ) 1111 1112 /* HVAR */ 1113 #define TT_FACE_FLAG_VAR_HADVANCE ( 1 << 1 ) 1114 #define TT_FACE_FLAG_VAR_LSB ( 1 << 2 ) 1115 #define TT_FACE_FLAG_VAR_RSB ( 1 << 3 ) 1116 1117 /* VVAR */ 1118 #define TT_FACE_FLAG_VAR_VADVANCE ( 1 << 4 ) 1119 #define TT_FACE_FLAG_VAR_TSB ( 1 << 5 ) 1120 #define TT_FACE_FLAG_VAR_BSB ( 1 << 6 ) 1121 #define TT_FACE_FLAG_VAR_VORG ( 1 << 7 ) 1122 1123 /* MVAR */ 1124 #define TT_FACE_FLAG_VAR_MVAR ( 1 << 8 ) 1125 1126 1127 /*************************************************************************/ 1128 /* */ 1129 /* TrueType Face Type */ 1130 /* */ 1131 /* <Struct> */ 1132 /* TT_Face */ 1133 /* */ 1134 /* <Description> */ 1135 /* The TrueType face class. These objects model the resolution and */ 1136 /* point-size independent data found in a TrueType font file. */ 1137 /* */ 1138 /* <Fields> */ 1139 /* root :: The base FT_Face structure, managed by the */ 1140 /* base layer. */ 1141 /* */ 1142 /* ttc_header :: The TrueType collection header, used when */ 1143 /* the file is a `ttc' rather than a `ttf'. */ 1144 /* For ordinary font files, the field */ 1145 /* `ttc_header.count' is set to 0. */ 1146 /* */ 1147 /* format_tag :: The font format tag. */ 1148 /* */ 1149 /* num_tables :: The number of TrueType tables in this font */ 1150 /* file. */ 1151 /* */ 1152 /* dir_tables :: The directory of TrueType tables for this */ 1153 /* font file. */ 1154 /* */ 1155 /* header :: The font's font header (`head' table). */ 1156 /* Read on font opening. */ 1157 /* */ 1158 /* horizontal :: The font's horizontal header (`hhea' */ 1159 /* table). This field also contains the */ 1160 /* associated horizontal metrics table */ 1161 /* (`hmtx'). */ 1162 /* */ 1163 /* max_profile :: The font's maximum profile table. Read on */ 1164 /* font opening. Note that some maximum */ 1165 /* values cannot be taken directly from this */ 1166 /* table. We thus define additional fields */ 1167 /* below to hold the computed maxima. */ 1168 /* */ 1169 /* vertical_info :: A boolean which is set when the font file */ 1170 /* contains vertical metrics. If not, the */ 1171 /* value of the `vertical' field is */ 1172 /* undefined. */ 1173 /* */ 1174 /* vertical :: The font's vertical header (`vhea' table). */ 1175 /* This field also contains the associated */ 1176 /* vertical metrics table (`vmtx'), if found. */ 1177 /* IMPORTANT: The contents of this field is */ 1178 /* undefined if the `vertical_info' field is */ 1179 /* unset. */ 1180 /* */ 1181 /* num_names :: The number of name records within this */ 1182 /* TrueType font. */ 1183 /* */ 1184 /* name_table :: The table of name records (`name'). */ 1185 /* */ 1186 /* os2 :: The font's OS/2 table (`OS/2'). */ 1187 /* */ 1188 /* postscript :: The font's PostScript table (`post' */ 1189 /* table). The PostScript glyph names are */ 1190 /* not loaded by the driver on face opening. */ 1191 /* See the `ttpost' module for more details. */ 1192 /* */ 1193 /* cmap_table :: Address of the face's `cmap' SFNT table */ 1194 /* in memory (it's an extracted frame). */ 1195 /* */ 1196 /* cmap_size :: The size in bytes of the `cmap_table' */ 1197 /* described above. */ 1198 /* */ 1199 /* goto_table :: A function called by each TrueType table */ 1200 /* loader to position a stream's cursor to */ 1201 /* the start of a given table according to */ 1202 /* its tag. It defaults to TT_Goto_Face but */ 1203 /* can be different for strange formats (e.g. */ 1204 /* Type 42). */ 1205 /* */ 1206 /* access_glyph_frame :: A function used to access the frame of a */ 1207 /* given glyph within the face's font file. */ 1208 /* */ 1209 /* forget_glyph_frame :: A function used to forget the frame of a */ 1210 /* given glyph when all data has been loaded. */ 1211 /* */ 1212 /* read_glyph_header :: A function used to read a glyph header. */ 1213 /* It must be called between an `access' and */ 1214 /* `forget'. */ 1215 /* */ 1216 /* read_simple_glyph :: A function used to read a simple glyph. */ 1217 /* It must be called after the header was */ 1218 /* read, and before the `forget'. */ 1219 /* */ 1220 /* read_composite_glyph :: A function used to read a composite glyph. */ 1221 /* It must be called after the header was */ 1222 /* read, and before the `forget'. */ 1223 /* */ 1224 /* sfnt :: A pointer to the SFNT service. */ 1225 /* */ 1226 /* psnames :: A pointer to the PostScript names service. */ 1227 /* */ 1228 /* mm :: A pointer to the Multiple Masters service. */ 1229 /* */ 1230 /* var :: A pointer to the Metrics Variations */ 1231 /* service. */ 1232 /* */ 1233 /* hdmx :: The face's horizontal device metrics */ 1234 /* (`hdmx' table). This table is optional in */ 1235 /* TrueType/OpenType fonts. */ 1236 /* */ 1237 /* gasp :: The grid-fitting and scaling properties */ 1238 /* table (`gasp'). This table is optional in */ 1239 /* TrueType/OpenType fonts. */ 1240 /* */ 1241 /* pclt :: The `pclt' SFNT table. */ 1242 /* */ 1243 /* num_sbit_scales :: The number of sbit scales for this font. */ 1244 /* */ 1245 /* sbit_scales :: Array of sbit scales embedded in this */ 1246 /* font. This table is optional in a */ 1247 /* TrueType/OpenType font. */ 1248 /* */ 1249 /* postscript_names :: A table used to store the Postscript names */ 1250 /* of the glyphs for this font. See the */ 1251 /* file `ttconfig.h' for comments on the */ 1252 /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ 1253 /* */ 1254 /* font_program_size :: Size in bytecodes of the face's font */ 1255 /* program. 0 if none defined. Ignored for */ 1256 /* Type 2 fonts. */ 1257 /* */ 1258 /* font_program :: The face's font program (bytecode stream) */ 1259 /* executed at load time, also used during */ 1260 /* glyph rendering. Comes from the `fpgm' */ 1261 /* table. Ignored for Type 2 font fonts. */ 1262 /* */ 1263 /* cvt_program_size :: The size in bytecodes of the face's cvt */ 1264 /* program. Ignored for Type 2 fonts. */ 1265 /* */ 1266 /* cvt_program :: The face's cvt program (bytecode stream) */ 1267 /* executed each time an instance/size is */ 1268 /* changed/reset. Comes from the `prep' */ 1269 /* table. Ignored for Type 2 fonts. */ 1270 /* */ 1271 /* cvt_size :: Size of the control value table (in */ 1272 /* entries). Ignored for Type 2 fonts. */ 1273 /* */ 1274 /* cvt :: The face's original control value table. */ 1275 /* Coordinates are expressed in unscaled font */ 1276 /* units. Comes from the `cvt ' table. */ 1277 /* Ignored for Type 2 fonts. */ 1278 /* */ 1279 /* interpreter :: A pointer to the TrueType bytecode */ 1280 /* interpreters field is also used to hook */ 1281 /* the debugger in `ttdebug'. */ 1282 /* */ 1283 /* extra :: Reserved for third-party font drivers. */ 1284 /* */ 1285 /* postscript_name :: The PS name of the font. Used by the */ 1286 /* postscript name service. */ 1287 /* */ 1288 /* glyf_len :: The length of the `glyf' table. Needed */ 1289 /* for malformed `loca' tables. */ 1290 /* */ 1291 /* glyf_offset :: The file offset of the `glyf' table. */ 1292 /* */ 1293 /* is_cff2 :: Set if the font format is CFF2. */ 1294 /* */ 1295 /* doblend :: A boolean which is set if the font should */ 1296 /* be blended (this is for GX var). */ 1297 /* */ 1298 /* blend :: Contains the data needed to control GX */ 1299 /* variation tables (rather like Multiple */ 1300 /* Master data). */ 1301 /* */ 1302 /* variation_support :: Flags that indicate which OpenType */ 1303 /* functionality related to font variation */ 1304 /* support is present, valid, and usable. */ 1305 /* For example, TT_FACE_FLAG_VAR_FVAR is only */ 1306 /* set if we have at least one design axis. */ 1307 /* */ 1308 /* var_postscript_prefix :: */ 1309 /* The PostScript name prefix needed for */ 1310 /* constructing a variation font instance's */ 1311 /* PS name . */ 1312 /* */ 1313 /* var_postscript_prefix_len :: */ 1314 /* The length of the `var_postscript_prefix' */ 1315 /* string. */ 1316 /* */ 1317 /* horz_metrics_size :: The size of the `hmtx' table. */ 1318 /* */ 1319 /* vert_metrics_size :: The size of the `vmtx' table. */ 1320 /* */ 1321 /* num_locations :: The number of glyph locations in this */ 1322 /* TrueType file. This should be */ 1323 /* identical to the number of glyphs. */ 1324 /* Ignored for Type 2 fonts. */ 1325 /* */ 1326 /* glyph_locations :: An array of longs. These are offsets to */ 1327 /* glyph data within the `glyf' table. */ 1328 /* Ignored for Type 2 font faces. */ 1329 /* */ 1330 /* hdmx_table :: A pointer to the `hdmx' table. */ 1331 /* */ 1332 /* hdmx_table_size :: The size of the `hdmx' table. */ 1333 /* */ 1334 /* hdmx_record_count :: The number of hdmx records. */ 1335 /* */ 1336 /* hdmx_record_size :: The size of a single hdmx record. */ 1337 /* */ 1338 /* hdmx_record_sizes :: An array holding the ppem sizes available */ 1339 /* in the `hdmx' table. */ 1340 /* */ 1341 /* sbit_table :: A pointer to the font's embedded bitmap */ 1342 /* location table. */ 1343 /* */ 1344 /* sbit_table_size :: The size of `sbit_table'. */ 1345 /* */ 1346 /* sbit_table_type :: The sbit table type (CBLC, sbix, etc.). */ 1347 /* */ 1348 /* sbit_num_strikes :: The number of sbit strikes exposed by */ 1349 /* FreeType's API, omitting invalid strikes. */ 1350 /* */ 1351 /* sbit_strike_map :: A mapping between the strike indices */ 1352 /* exposed by the API and the indices used in */ 1353 /* the font's sbit table. */ 1354 /* */ 1355 /* kern_table :: A pointer to the `kern' table. */ 1356 /* */ 1357 /* kern_table_size :: The size of the `kern' table. */ 1358 /* */ 1359 /* num_kern_tables :: The number of supported kern subtables */ 1360 /* (up to 32; FreeType recognizes only */ 1361 /* horizontal ones with format 0). */ 1362 /* */ 1363 /* kern_avail_bits :: The availability status of kern subtables; */ 1364 /* if bit n is set, table n is available. */ 1365 /* */ 1366 /* kern_order_bits :: The sortedness status of kern subtables; */ 1367 /* if bit n is set, table n is sorted. */ 1368 /* */ 1369 /* bdf :: Data related to an SFNT font's `bdf' */ 1370 /* table; see `tttypes.h'. */ 1371 /* */ 1372 /* horz_metrics_offset :: The file offset of the `hmtx' table. */ 1373 /* */ 1374 /* vert_metrics_offset :: The file offset of the `vmtx' table. */ 1375 /* */ 1376 /* sph_found_func_flags :: Flags identifying special bytecode */ 1377 /* functions (used by the v38 implementation */ 1378 /* of the bytecode interpreter). */ 1379 /* */ 1380 /* sph_compatibility_mode :: */ 1381 /* This flag is set if we are in ClearType */ 1382 /* backward compatibility mode (used by the */ 1383 /* v38 implementation of the bytecode */ 1384 /* interpreter). */ 1385 /* */ 1386 /* ebdt_start :: The file offset of the sbit data table */ 1387 /* (CBDT, bdat, etc.). */ 1388 /* */ 1389 /* ebdt_size :: The size of the sbit data table. */ 1390 /* */ 1391 typedef struct TT_FaceRec_ 1392 { 1393 FT_FaceRec root; 1394 1395 TTC_HeaderRec ttc_header; 1396 1397 FT_ULong format_tag; 1398 FT_UShort num_tables; 1399 TT_Table dir_tables; 1400 1401 TT_Header header; /* TrueType header table */ 1402 TT_HoriHeader horizontal; /* TrueType horizontal header */ 1403 1404 TT_MaxProfile max_profile; 1405 1406 FT_Bool vertical_info; 1407 TT_VertHeader vertical; /* TT Vertical header, if present */ 1408 1409 FT_UShort num_names; /* number of name records */ 1410 TT_NameTableRec name_table; /* name table */ 1411 1412 TT_OS2 os2; /* TrueType OS/2 table */ 1413 TT_Postscript postscript; /* TrueType Postscript table */ 1414 1415 FT_Byte* cmap_table; /* extracted `cmap' table */ 1416 FT_ULong cmap_size; 1417 1418 TT_Loader_GotoTableFunc goto_table; 1419 1420 TT_Loader_StartGlyphFunc access_glyph_frame; 1421 TT_Loader_EndGlyphFunc forget_glyph_frame; 1422 TT_Loader_ReadGlyphFunc read_glyph_header; 1423 TT_Loader_ReadGlyphFunc read_simple_glyph; 1424 TT_Loader_ReadGlyphFunc read_composite_glyph; 1425 1426 /* a typeless pointer to the SFNT_Interface table used to load */ 1427 /* the basic TrueType tables in the face object */ 1428 void* sfnt; 1429 1430 /* a typeless pointer to the FT_Service_PsCMapsRec table used to */ 1431 /* handle glyph names <-> unicode & Mac values */ 1432 void* psnames; 1433 1434 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 1435 /* a typeless pointer to the FT_Service_MultiMasters table used to */ 1436 /* handle variation fonts */ 1437 void* mm; 1438 1439 /* a typeless pointer to the FT_Service_MetricsVariationsRec table */ 1440 /* used to handle the HVAR, VVAR, and MVAR OpenType tables */ 1441 void* var; 1442 #endif 1443 1444 /* a typeless pointer to the PostScript Aux service */ 1445 void* psaux; 1446 1447 1448 /***********************************************************************/ 1449 /* */ 1450 /* Optional TrueType/OpenType tables */ 1451 /* */ 1452 /***********************************************************************/ 1453 1454 /* grid-fitting and scaling table */ 1455 TT_GaspRec gasp; /* the `gasp' table */ 1456 1457 /* PCL 5 table */ 1458 TT_PCLT pclt; 1459 1460 /* embedded bitmaps support */ 1461 FT_ULong num_sbit_scales; 1462 TT_SBit_Scale sbit_scales; 1463 1464 /* postscript names table */ 1465 TT_Post_NamesRec postscript_names; 1466 1467 1468 /***********************************************************************/ 1469 /* */ 1470 /* TrueType-specific fields (ignored by the CFF driver) */ 1471 /* */ 1472 /***********************************************************************/ 1473 1474 /* the font program, if any */ 1475 FT_ULong font_program_size; 1476 FT_Byte* font_program; 1477 1478 /* the cvt program, if any */ 1479 FT_ULong cvt_program_size; 1480 FT_Byte* cvt_program; 1481 1482 /* the original, unscaled, control value table */ 1483 FT_ULong cvt_size; 1484 FT_Short* cvt; 1485 1486 /* A pointer to the bytecode interpreter to use. This is also */ 1487 /* used to hook the debugger for the `ttdebug' utility. */ 1488 TT_Interpreter interpreter; 1489 1490 1491 /***********************************************************************/ 1492 /* */ 1493 /* Other tables or fields. This is used by derivative formats like */ 1494 /* OpenType. */ 1495 /* */ 1496 /***********************************************************************/ 1497 1498 FT_Generic extra; 1499 1500 const char* postscript_name; 1501 1502 FT_ULong glyf_len; 1503 FT_ULong glyf_offset; /* since 2.7.1 */ 1504 1505 FT_Bool is_cff2; /* since 2.7.1 */ 1506 1507 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 1508 FT_Bool doblend; 1509 GX_Blend blend; 1510 1511 FT_UInt32 variation_support; /* since 2.7.1 */ 1512 1513 const char* var_postscript_prefix; /* since 2.7.2 */ 1514 FT_UInt var_postscript_prefix_len; /* since 2.7.2 */ 1515 1516 #endif 1517 1518 /* since version 2.2 */ 1519 1520 FT_ULong horz_metrics_size; 1521 FT_ULong vert_metrics_size; 1522 1523 FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */ 1524 FT_Byte* glyph_locations; 1525 1526 FT_Byte* hdmx_table; 1527 FT_ULong hdmx_table_size; 1528 FT_UInt hdmx_record_count; 1529 FT_ULong hdmx_record_size; 1530 FT_Byte* hdmx_record_sizes; 1531 1532 FT_Byte* sbit_table; 1533 FT_ULong sbit_table_size; 1534 TT_SbitTableType sbit_table_type; 1535 FT_UInt sbit_num_strikes; 1536 FT_UInt* sbit_strike_map; 1537 1538 FT_Byte* kern_table; 1539 FT_ULong kern_table_size; 1540 FT_UInt num_kern_tables; 1541 FT_UInt32 kern_avail_bits; 1542 FT_UInt32 kern_order_bits; 1543 1544 #ifdef TT_CONFIG_OPTION_BDF 1545 TT_BDFRec bdf; 1546 #endif /* TT_CONFIG_OPTION_BDF */ 1547 1548 /* since 2.3.0 */ 1549 FT_ULong horz_metrics_offset; 1550 FT_ULong vert_metrics_offset; 1551 1552 #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY 1553 /* since 2.4.12 */ 1554 FT_ULong sph_found_func_flags; /* special functions found */ 1555 /* for this face */ 1556 FT_Bool sph_compatibility_mode; 1557 #endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */ 1558 1559 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS 1560 /* since 2.7 */ 1561 FT_ULong ebdt_start; /* either `CBDT', `EBDT', or `bdat' */ 1562 FT_ULong ebdt_size; 1563 #endif 1564 1565 } TT_FaceRec; 1566 1567 1568 /*************************************************************************/ 1569 /* */ 1570 /* <Struct> */ 1571 /* TT_GlyphZoneRec */ 1572 /* */ 1573 /* <Description> */ 1574 /* A glyph zone is used to load, scale and hint glyph outline */ 1575 /* coordinates. */ 1576 /* */ 1577 /* <Fields> */ 1578 /* memory :: A handle to the memory manager. */ 1579 /* */ 1580 /* max_points :: The maximum size in points of the zone. */ 1581 /* */ 1582 /* max_contours :: Max size in links contours of the zone. */ 1583 /* */ 1584 /* n_points :: The current number of points in the zone. */ 1585 /* */ 1586 /* n_contours :: The current number of contours in the zone. */ 1587 /* */ 1588 /* org :: The original glyph coordinates (font */ 1589 /* units/scaled). */ 1590 /* */ 1591 /* cur :: The current glyph coordinates (scaled/hinted). */ 1592 /* */ 1593 /* tags :: The point control tags. */ 1594 /* */ 1595 /* contours :: The contours end points. */ 1596 /* */ 1597 /* first_point :: Offset of the current subglyph's first point. */ 1598 /* */ 1599 typedef struct TT_GlyphZoneRec_ 1600 { 1601 FT_Memory memory; 1602 FT_UShort max_points; 1603 FT_Short max_contours; 1604 FT_UShort n_points; /* number of points in zone */ 1605 FT_Short n_contours; /* number of contours */ 1606 1607 FT_Vector* org; /* original point coordinates */ 1608 FT_Vector* cur; /* current point coordinates */ 1609 FT_Vector* orus; /* original (unscaled) point coordinates */ 1610 1611 FT_Byte* tags; /* current touch flags */ 1612 FT_UShort* contours; /* contour end points */ 1613 1614 FT_UShort first_point; /* offset of first (#0) point */ 1615 1616 } TT_GlyphZoneRec, *TT_GlyphZone; 1617 1618 1619 /* handle to execution context */ 1620 typedef struct TT_ExecContextRec_* TT_ExecContext; 1621 1622 1623 /*************************************************************************/ 1624 /* */ 1625 /* <Type> */ 1626 /* TT_Size */ 1627 /* */ 1628 /* <Description> */ 1629 /* A handle to a TrueType size object. */ 1630 /* */ 1631 typedef struct TT_SizeRec_* TT_Size; 1632 1633 1634 /* glyph loader structure */ 1635 typedef struct TT_LoaderRec_ 1636 { 1637 TT_Face face; 1638 TT_Size size; 1639 FT_GlyphSlot glyph; 1640 FT_GlyphLoader gloader; 1641 1642 FT_ULong load_flags; 1643 FT_UInt glyph_index; 1644 1645 FT_Stream stream; 1646 FT_Int byte_len; 1647 1648 FT_Short n_contours; 1649 FT_BBox bbox; 1650 FT_Int left_bearing; 1651 FT_Int advance; 1652 FT_Int linear; 1653 FT_Bool linear_def; 1654 FT_Vector pp1; 1655 FT_Vector pp2; 1656 1657 /* the zone where we load our glyphs */ 1658 TT_GlyphZoneRec base; 1659 TT_GlyphZoneRec zone; 1660 1661 TT_ExecContext exec; 1662 FT_Byte* instructions; 1663 FT_ULong ins_pos; 1664 1665 /* for possible extensibility in other formats */ 1666 void* other; 1667 1668 /* since version 2.1.8 */ 1669 FT_Int top_bearing; 1670 FT_Int vadvance; 1671 FT_Vector pp3; 1672 FT_Vector pp4; 1673 1674 /* since version 2.2.1 */ 1675 FT_Byte* cursor; 1676 FT_Byte* limit; 1677 1678 /* since version 2.6.2 */ 1679 FT_ListRec composites; 1680 1681 } TT_LoaderRec; 1682 1683 1684 FT_END_HEADER 1685 1686 #endif /* TTTYPES_H_ */ 1687 1688 1689 /* END */ 1690
