1 /***************************************************************************/ 2 /* */ 3 /* tttypes.h */ 4 /* */ 5 /* Basic SFNT/TrueType type definitions and interface (specification */ 6 /* only). */ 7 /* */ 8 /* Copyright 1996-2015 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 /* 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 /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bloc.html */ 618 /* */ 619 /* hori :: The line metrics for horizontal layouts. */ 620 /* */ 621 /* vert :: The line metrics for vertical layouts. */ 622 /* */ 623 /* start_glyph :: The lowest glyph index for this strike. */ 624 /* */ 625 /* end_glyph :: The highest glyph index for this strike. */ 626 /* */ 627 /* x_ppem :: The number of horizontal pixels per EM. */ 628 /* */ 629 /* y_ppem :: The number of vertical pixels per EM. */ 630 /* */ 631 /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */ 632 /* and 8. */ 633 /* */ 634 /* flags :: Is this a vertical or horizontal strike? For */ 635 /* details, please see */ 636 /* */ 637 /* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6bloc.html */ 638 /* */ 639 typedef struct TT_SBit_StrikeRec_ 640 { 641 FT_Int num_ranges; 642 TT_SBit_Range sbit_ranges; 643 FT_ULong ranges_offset; 644 645 FT_ULong color_ref; 646 647 TT_SBit_LineMetricsRec hori; 648 TT_SBit_LineMetricsRec vert; 649 650 FT_UShort start_glyph; 651 FT_UShort end_glyph; 652 653 FT_Byte x_ppem; 654 FT_Byte y_ppem; 655 656 FT_Byte bit_depth; 657 FT_Char flags; 658 659 } TT_SBit_StrikeRec, *TT_SBit_Strike; 660 661 662 /*************************************************************************/ 663 /* */ 664 /* <Struct> */ 665 /* TT_SBit_ComponentRec */ 666 /* */ 667 /* <Description> */ 668 /* A simple structure to describe a compound sbit element. */ 669 /* */ 670 /* <Fields> */ 671 /* glyph_code :: The element's glyph index. */ 672 /* */ 673 /* x_offset :: The element's left bearing. */ 674 /* */ 675 /* y_offset :: The element's top bearing. */ 676 /* */ 677 typedef struct TT_SBit_ComponentRec_ 678 { 679 FT_UShort glyph_code; 680 FT_Char x_offset; 681 FT_Char y_offset; 682 683 } TT_SBit_ComponentRec, *TT_SBit_Component; 684 685 686 /*************************************************************************/ 687 /* */ 688 /* <Struct> */ 689 /* TT_SBit_ScaleRec */ 690 /* */ 691 /* <Description> */ 692 /* A structure used describe a given bitmap scaling table, as defined */ 693 /* in the `EBSC' table. */ 694 /* */ 695 /* <Fields> */ 696 /* hori :: The horizontal line metrics. */ 697 /* */ 698 /* vert :: The vertical line metrics. */ 699 /* */ 700 /* x_ppem :: The number of horizontal pixels per EM. */ 701 /* */ 702 /* y_ppem :: The number of vertical pixels per EM. */ 703 /* */ 704 /* x_ppem_substitute :: Substitution x_ppem value. */ 705 /* */ 706 /* y_ppem_substitute :: Substitution y_ppem value. */ 707 /* */ 708 typedef struct TT_SBit_ScaleRec_ 709 { 710 TT_SBit_LineMetricsRec hori; 711 TT_SBit_LineMetricsRec vert; 712 713 FT_Byte x_ppem; 714 FT_Byte y_ppem; 715 716 FT_Byte x_ppem_substitute; 717 FT_Byte y_ppem_substitute; 718 719 } TT_SBit_ScaleRec, *TT_SBit_Scale; 720 721 722 /*************************************************************************/ 723 /*************************************************************************/ 724 /*************************************************************************/ 725 /*** ***/ 726 /*** ***/ 727 /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/ 728 /*** ***/ 729 /*** ***/ 730 /*************************************************************************/ 731 /*************************************************************************/ 732 /*************************************************************************/ 733 734 735 /*************************************************************************/ 736 /* */ 737 /* <Struct> */ 738 /* TT_Post_20Rec */ 739 /* */ 740 /* <Description> */ 741 /* Postscript names sub-table, format 2.0. Stores the PS name of */ 742 /* each glyph in the font face. */ 743 /* */ 744 /* <Fields> */ 745 /* num_glyphs :: The number of named glyphs in the table. */ 746 /* */ 747 /* num_names :: The number of PS names stored in the table. */ 748 /* */ 749 /* glyph_indices :: The indices of the glyphs in the names arrays. */ 750 /* */ 751 /* glyph_names :: The PS names not in Mac Encoding. */ 752 /* */ 753 typedef struct TT_Post_20Rec_ 754 { 755 FT_UShort num_glyphs; 756 FT_UShort num_names; 757 FT_UShort* glyph_indices; 758 FT_Char** glyph_names; 759 760 } TT_Post_20Rec, *TT_Post_20; 761 762 763 /*************************************************************************/ 764 /* */ 765 /* <Struct> */ 766 /* TT_Post_25Rec */ 767 /* */ 768 /* <Description> */ 769 /* Postscript names sub-table, format 2.5. Stores the PS name of */ 770 /* each glyph in the font face. */ 771 /* */ 772 /* <Fields> */ 773 /* num_glyphs :: The number of glyphs in the table. */ 774 /* */ 775 /* offsets :: An array of signed offsets in a normal Mac */ 776 /* Postscript name encoding. */ 777 /* */ 778 typedef struct TT_Post_25_ 779 { 780 FT_UShort num_glyphs; 781 FT_Char* offsets; 782 783 } TT_Post_25Rec, *TT_Post_25; 784 785 786 /*************************************************************************/ 787 /* */ 788 /* <Struct> */ 789 /* TT_Post_NamesRec */ 790 /* */ 791 /* <Description> */ 792 /* Postscript names table, either format 2.0 or 2.5. */ 793 /* */ 794 /* <Fields> */ 795 /* loaded :: A flag to indicate whether the PS names are loaded. */ 796 /* */ 797 /* format_20 :: The sub-table used for format 2.0. */ 798 /* */ 799 /* format_25 :: The sub-table used for format 2.5. */ 800 /* */ 801 typedef struct TT_Post_NamesRec_ 802 { 803 FT_Bool loaded; 804 805 union 806 { 807 TT_Post_20Rec format_20; 808 TT_Post_25Rec format_25; 809 810 } names; 811 812 } TT_Post_NamesRec, *TT_Post_Names; 813 814 815 /*************************************************************************/ 816 /*************************************************************************/ 817 /*************************************************************************/ 818 /*** ***/ 819 /*** ***/ 820 /*** GX VARIATION TABLE SUPPORT ***/ 821 /*** ***/ 822 /*** ***/ 823 /*************************************************************************/ 824 /*************************************************************************/ 825 /*************************************************************************/ 826 827 828 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 829 typedef struct GX_BlendRec_ *GX_Blend; 830 #endif 831 832 /*************************************************************************/ 833 /*************************************************************************/ 834 /*************************************************************************/ 835 /*** ***/ 836 /*** ***/ 837 /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/ 838 /*** ***/ 839 /*** ***/ 840 /*************************************************************************/ 841 /*************************************************************************/ 842 /*************************************************************************/ 843 844 /* 845 * These types are used to support a `BDF ' table that isn't part of the 846 * official TrueType specification. It is mainly used in SFNT-based 847 * bitmap fonts that were generated from a set of BDF fonts. 848 * 849 * The format of the table is as follows. 850 * 851 * USHORT version `BDF ' table version number, should be 0x0001. 852 * USHORT strikeCount Number of strikes (bitmap sizes) in this table. 853 * ULONG stringTable Offset (from start of BDF table) to string 854 * table. 855 * 856 * This is followed by an array of `strikeCount' descriptors, having the 857 * following format. 858 * 859 * USHORT ppem Vertical pixels per EM for this strike. 860 * USHORT numItems Number of items for this strike (properties and 861 * atoms). Maximum is 255. 862 * 863 * This array in turn is followed by `strikeCount' value sets. Each 864 * `value set' is an array of `numItems' items with the following format. 865 * 866 * ULONG item_name Offset in string table to item name. 867 * USHORT item_type The item type. Possible values are 868 * 0 => string (e.g., COMMENT) 869 * 1 => atom (e.g., FONT or even SIZE) 870 * 2 => int32 871 * 3 => uint32 872 * 0x10 => A flag to indicate a properties. This 873 * is ORed with the above values. 874 * ULONG item_value For strings => Offset into string table without 875 * the corresponding double quotes. 876 * For atoms => Offset into string table. 877 * For integers => Direct value. 878 * 879 * All strings in the string table consist of bytes and are 880 * zero-terminated. 881 * 882 */ 883 884 #ifdef TT_CONFIG_OPTION_BDF 885 886 typedef struct TT_BDFRec_ 887 { 888 FT_Byte* table; 889 FT_Byte* table_end; 890 FT_Byte* strings; 891 FT_ULong strings_size; 892 FT_UInt num_strikes; 893 FT_Bool loaded; 894 895 } TT_BDFRec, *TT_BDF; 896 897 #endif /* TT_CONFIG_OPTION_BDF */ 898 899 /*************************************************************************/ 900 /*************************************************************************/ 901 /*************************************************************************/ 902 /*** ***/ 903 /*** ***/ 904 /*** ORIGINAL TT_FACE CLASS DEFINITION ***/ 905 /*** ***/ 906 /*** ***/ 907 /*************************************************************************/ 908 /*************************************************************************/ 909 /*************************************************************************/ 910 911 912 /*************************************************************************/ 913 /* */ 914 /* This structure/class is defined here because it is common to the */ 915 /* following formats: TTF, OpenType-TT, and OpenType-CFF. */ 916 /* */ 917 /* Note, however, that the classes TT_Size and TT_GlyphSlot are not */ 918 /* shared between font drivers, and are thus defined in `ttobjs.h'. */ 919 /* */ 920 /*************************************************************************/ 921 922 923 /*************************************************************************/ 924 /* */ 925 /* <Type> */ 926 /* TT_Face */ 927 /* */ 928 /* <Description> */ 929 /* A handle to a TrueType face/font object. A TT_Face encapsulates */ 930 /* the resolution and scaling independent parts of a TrueType font */ 931 /* resource. */ 932 /* */ 933 /* <Note> */ 934 /* The TT_Face structure is also used as a `parent class' for the */ 935 /* OpenType-CFF class (T2_Face). */ 936 /* */ 937 typedef struct TT_FaceRec_* TT_Face; 938 939 940 /* a function type used for the truetype bytecode interpreter hooks */ 941 typedef FT_Error 942 (*TT_Interpreter)( void* exec_context ); 943 944 /* forward declaration */ 945 typedef struct TT_LoaderRec_* TT_Loader; 946 947 948 /*************************************************************************/ 949 /* */ 950 /* <FuncType> */ 951 /* TT_Loader_GotoTableFunc */ 952 /* */ 953 /* <Description> */ 954 /* Seeks a stream to the start of a given TrueType table. */ 955 /* */ 956 /* <Input> */ 957 /* face :: A handle to the target face object. */ 958 /* */ 959 /* tag :: A 4-byte tag used to name the table. */ 960 /* */ 961 /* stream :: The input stream. */ 962 /* */ 963 /* <Output> */ 964 /* length :: The length of the table in bytes. Set to 0 if not */ 965 /* needed. */ 966 /* */ 967 /* <Return> */ 968 /* FreeType error code. 0 means success. */ 969 /* */ 970 /* <Note> */ 971 /* The stream cursor must be at the font file's origin. */ 972 /* */ 973 typedef FT_Error 974 (*TT_Loader_GotoTableFunc)( TT_Face face, 975 FT_ULong tag, 976 FT_Stream stream, 977 FT_ULong* length ); 978 979 980 /*************************************************************************/ 981 /* */ 982 /* <FuncType> */ 983 /* TT_Loader_StartGlyphFunc */ 984 /* */ 985 /* <Description> */ 986 /* Seeks a stream to the start of a given glyph element, and opens a */ 987 /* frame for it. */ 988 /* */ 989 /* <Input> */ 990 /* loader :: The current TrueType glyph loader object. */ 991 /* */ 992 /* glyph index :: The index of the glyph to access. */ 993 /* */ 994 /* offset :: The offset of the glyph according to the */ 995 /* `locations' table. */ 996 /* */ 997 /* byte_count :: The size of the frame in bytes. */ 998 /* */ 999 /* <Return> */ 1000 /* FreeType error code. 0 means success. */ 1001 /* */ 1002 /* <Note> */ 1003 /* This function is normally equivalent to FT_STREAM_SEEK(offset) */ 1004 /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */ 1005 /* but alternative formats (e.g. compressed ones) might use something */ 1006 /* different. */ 1007 /* */ 1008 typedef FT_Error 1009 (*TT_Loader_StartGlyphFunc)( TT_Loader loader, 1010 FT_UInt glyph_index, 1011 FT_ULong offset, 1012 FT_UInt byte_count ); 1013 1014 1015 /*************************************************************************/ 1016 /* */ 1017 /* <FuncType> */ 1018 /* TT_Loader_ReadGlyphFunc */ 1019 /* */ 1020 /* <Description> */ 1021 /* Reads one glyph element (its header, a simple glyph, or a */ 1022 /* composite) from the loader's current stream frame. */ 1023 /* */ 1024 /* <Input> */ 1025 /* loader :: The current TrueType glyph loader object. */ 1026 /* */ 1027 /* <Return> */ 1028 /* FreeType error code. 0 means success. */ 1029 /* */ 1030 typedef FT_Error 1031 (*TT_Loader_ReadGlyphFunc)( TT_Loader loader ); 1032 1033 1034 /*************************************************************************/ 1035 /* */ 1036 /* <FuncType> */ 1037 /* TT_Loader_EndGlyphFunc */ 1038 /* */ 1039 /* <Description> */ 1040 /* Closes the current loader stream frame for the glyph. */ 1041 /* */ 1042 /* <Input> */ 1043 /* loader :: The current TrueType glyph loader object. */ 1044 /* */ 1045 typedef void 1046 (*TT_Loader_EndGlyphFunc)( TT_Loader loader ); 1047 1048 1049 typedef enum TT_SbitTableType_ 1050 { 1051 TT_SBIT_TABLE_TYPE_NONE = 0, 1052 TT_SBIT_TABLE_TYPE_EBLC, /* `EBLC' (Microsoft), */ 1053 /* `bloc' (Apple) */ 1054 TT_SBIT_TABLE_TYPE_CBLC, /* `CBLC' (Google) */ 1055 TT_SBIT_TABLE_TYPE_SBIX, /* `sbix' (Apple) */ 1056 1057 /* do not remove */ 1058 TT_SBIT_TABLE_TYPE_MAX 1059 1060 } TT_SbitTableType; 1061 1062 1063 /*************************************************************************/ 1064 /* */ 1065 /* TrueType Face Type */ 1066 /* */ 1067 /* <Struct> */ 1068 /* TT_Face */ 1069 /* */ 1070 /* <Description> */ 1071 /* The TrueType face class. These objects model the resolution and */ 1072 /* point-size independent data found in a TrueType font file. */ 1073 /* */ 1074 /* <Fields> */ 1075 /* root :: The base FT_Face structure, managed by the */ 1076 /* base layer. */ 1077 /* */ 1078 /* ttc_header :: The TrueType collection header, used when */ 1079 /* the file is a `ttc' rather than a `ttf'. */ 1080 /* For ordinary font files, the field */ 1081 /* `ttc_header.count' is set to 0. */ 1082 /* */ 1083 /* format_tag :: The font format tag. */ 1084 /* */ 1085 /* num_tables :: The number of TrueType tables in this font */ 1086 /* file. */ 1087 /* */ 1088 /* dir_tables :: The directory of TrueType tables for this */ 1089 /* font file. */ 1090 /* */ 1091 /* header :: The font's font header (`head' table). */ 1092 /* Read on font opening. */ 1093 /* */ 1094 /* horizontal :: The font's horizontal header (`hhea' */ 1095 /* table). This field also contains the */ 1096 /* associated horizontal metrics table */ 1097 /* (`hmtx'). */ 1098 /* */ 1099 /* max_profile :: The font's maximum profile table. Read on */ 1100 /* font opening. Note that some maximum */ 1101 /* values cannot be taken directly from this */ 1102 /* table. We thus define additional fields */ 1103 /* below to hold the computed maxima. */ 1104 /* */ 1105 /* vertical_info :: A boolean which is set when the font file */ 1106 /* contains vertical metrics. If not, the */ 1107 /* value of the `vertical' field is */ 1108 /* undefined. */ 1109 /* */ 1110 /* vertical :: The font's vertical header (`vhea' table). */ 1111 /* This field also contains the associated */ 1112 /* vertical metrics table (`vmtx'), if found. */ 1113 /* IMPORTANT: The contents of this field is */ 1114 /* undefined if the `vertical_info' field is */ 1115 /* unset. */ 1116 /* */ 1117 /* num_names :: The number of name records within this */ 1118 /* TrueType font. */ 1119 /* */ 1120 /* name_table :: The table of name records (`name'). */ 1121 /* */ 1122 /* os2 :: The font's OS/2 table (`OS/2'). */ 1123 /* */ 1124 /* postscript :: The font's PostScript table (`post' */ 1125 /* table). The PostScript glyph names are */ 1126 /* not loaded by the driver on face opening. */ 1127 /* See the `ttpost' module for more details. */ 1128 /* */ 1129 /* cmap_table :: Address of the face's `cmap' SFNT table */ 1130 /* in memory (it's an extracted frame). */ 1131 /* */ 1132 /* cmap_size :: The size in bytes of the `cmap_table' */ 1133 /* described above. */ 1134 /* */ 1135 /* goto_table :: A function called by each TrueType table */ 1136 /* loader to position a stream's cursor to */ 1137 /* the start of a given table according to */ 1138 /* its tag. It defaults to TT_Goto_Face but */ 1139 /* can be different for strange formats (e.g. */ 1140 /* Type 42). */ 1141 /* */ 1142 /* access_glyph_frame :: A function used to access the frame of a */ 1143 /* given glyph within the face's font file. */ 1144 /* */ 1145 /* forget_glyph_frame :: A function used to forget the frame of a */ 1146 /* given glyph when all data has been loaded. */ 1147 /* */ 1148 /* read_glyph_header :: A function used to read a glyph header. */ 1149 /* It must be called between an `access' and */ 1150 /* `forget'. */ 1151 /* */ 1152 /* read_simple_glyph :: A function used to read a simple glyph. */ 1153 /* It must be called after the header was */ 1154 /* read, and before the `forget'. */ 1155 /* */ 1156 /* read_composite_glyph :: A function used to read a composite glyph. */ 1157 /* It must be called after the header was */ 1158 /* read, and before the `forget'. */ 1159 /* */ 1160 /* sfnt :: A pointer to the SFNT service. */ 1161 /* */ 1162 /* psnames :: A pointer to the PostScript names service. */ 1163 /* */ 1164 /* hdmx :: The face's horizontal device metrics */ 1165 /* (`hdmx' table). This table is optional in */ 1166 /* TrueType/OpenType fonts. */ 1167 /* */ 1168 /* gasp :: The grid-fitting and scaling properties */ 1169 /* table (`gasp'). This table is optional in */ 1170 /* TrueType/OpenType fonts. */ 1171 /* */ 1172 /* pclt :: The `pclt' SFNT table. */ 1173 /* */ 1174 /* num_sbit_scales :: The number of sbit scales for this font. */ 1175 /* */ 1176 /* sbit_scales :: Array of sbit scales embedded in this */ 1177 /* font. This table is optional in a */ 1178 /* TrueType/OpenType font. */ 1179 /* */ 1180 /* postscript_names :: A table used to store the Postscript names */ 1181 /* of the glyphs for this font. See the */ 1182 /* file `ttconfig.h' for comments on the */ 1183 /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ 1184 /* */ 1185 /* num_locations :: The number of glyph locations in this */ 1186 /* TrueType file. This should be */ 1187 /* identical to the number of glyphs. */ 1188 /* Ignored for Type 2 fonts. */ 1189 /* */ 1190 /* glyph_locations :: An array of longs. These are offsets to */ 1191 /* glyph data within the `glyf' table. */ 1192 /* Ignored for Type 2 font faces. */ 1193 /* */ 1194 /* glyf_len :: The length of the `glyf' table. Needed */ 1195 /* for malformed `loca' tables. */ 1196 /* */ 1197 /* font_program_size :: Size in bytecodes of the face's font */ 1198 /* program. 0 if none defined. Ignored for */ 1199 /* Type 2 fonts. */ 1200 /* */ 1201 /* font_program :: The face's font program (bytecode stream) */ 1202 /* executed at load time, also used during */ 1203 /* glyph rendering. Comes from the `fpgm' */ 1204 /* table. Ignored for Type 2 font fonts. */ 1205 /* */ 1206 /* cvt_program_size :: The size in bytecodes of the face's cvt */ 1207 /* program. Ignored for Type 2 fonts. */ 1208 /* */ 1209 /* cvt_program :: The face's cvt program (bytecode stream) */ 1210 /* executed each time an instance/size is */ 1211 /* changed/reset. Comes from the `prep' */ 1212 /* table. Ignored for Type 2 fonts. */ 1213 /* */ 1214 /* cvt_size :: Size of the control value table (in */ 1215 /* entries). Ignored for Type 2 fonts. */ 1216 /* */ 1217 /* cvt :: The face's original control value table. */ 1218 /* Coordinates are expressed in unscaled font */ 1219 /* units. Comes from the `cvt ' table. */ 1220 /* Ignored for Type 2 fonts. */ 1221 /* */ 1222 /* num_kern_pairs :: The number of kerning pairs present in the */ 1223 /* font file. The engine only loads the */ 1224 /* first horizontal format 0 kern table it */ 1225 /* finds in the font file. Ignored for */ 1226 /* Type 2 fonts. */ 1227 /* */ 1228 /* kern_table_index :: The index of the kerning table in the font */ 1229 /* kerning directory. Ignored for Type 2 */ 1230 /* fonts. */ 1231 /* */ 1232 /* interpreter :: A pointer to the TrueType bytecode */ 1233 /* interpreters field is also used to hook */ 1234 /* the debugger in `ttdebug'. */ 1235 /* */ 1236 /* unpatented_hinting :: If true, use only unpatented methods in */ 1237 /* the bytecode interpreter. */ 1238 /* */ 1239 /* doblend :: A boolean which is set if the font should */ 1240 /* be blended (this is for GX var). */ 1241 /* */ 1242 /* blend :: Contains the data needed to control GX */ 1243 /* variation tables (rather like Multiple */ 1244 /* Master data). */ 1245 /* */ 1246 /* extra :: Reserved for third-party font drivers. */ 1247 /* */ 1248 /* postscript_name :: The PS name of the font. Used by the */ 1249 /* postscript name service. */ 1250 /* */ 1251 typedef struct TT_FaceRec_ 1252 { 1253 FT_FaceRec root; 1254 1255 TTC_HeaderRec ttc_header; 1256 1257 FT_ULong format_tag; 1258 FT_UShort num_tables; 1259 TT_Table dir_tables; 1260 1261 TT_Header header; /* TrueType header table */ 1262 TT_HoriHeader horizontal; /* TrueType horizontal header */ 1263 1264 TT_MaxProfile max_profile; 1265 1266 FT_Bool vertical_info; 1267 TT_VertHeader vertical; /* TT Vertical header, if present */ 1268 1269 FT_UShort num_names; /* number of name records */ 1270 TT_NameTableRec name_table; /* name table */ 1271 1272 TT_OS2 os2; /* TrueType OS/2 table */ 1273 TT_Postscript postscript; /* TrueType Postscript table */ 1274 1275 FT_Byte* cmap_table; /* extracted `cmap' table */ 1276 FT_ULong cmap_size; 1277 1278 TT_Loader_GotoTableFunc goto_table; 1279 1280 TT_Loader_StartGlyphFunc access_glyph_frame; 1281 TT_Loader_EndGlyphFunc forget_glyph_frame; 1282 TT_Loader_ReadGlyphFunc read_glyph_header; 1283 TT_Loader_ReadGlyphFunc read_simple_glyph; 1284 TT_Loader_ReadGlyphFunc read_composite_glyph; 1285 1286 /* a typeless pointer to the SFNT_Interface table used to load */ 1287 /* the basic TrueType tables in the face object */ 1288 void* sfnt; 1289 1290 /* a typeless pointer to the FT_Service_PsCMapsRec table used to */ 1291 /* handle glyph names <-> unicode & Mac values */ 1292 void* psnames; 1293 1294 1295 /***********************************************************************/ 1296 /* */ 1297 /* Optional TrueType/OpenType tables */ 1298 /* */ 1299 /***********************************************************************/ 1300 1301 /* grid-fitting and scaling table */ 1302 TT_GaspRec gasp; /* the `gasp' table */ 1303 1304 /* PCL 5 table */ 1305 TT_PCLT pclt; 1306 1307 /* embedded bitmaps support */ 1308 FT_ULong num_sbit_scales; 1309 TT_SBit_Scale sbit_scales; 1310 1311 /* postscript names table */ 1312 TT_Post_NamesRec postscript_names; 1313 1314 1315 /***********************************************************************/ 1316 /* */ 1317 /* TrueType-specific fields (ignored by the OTF-Type2 driver) */ 1318 /* */ 1319 /***********************************************************************/ 1320 1321 /* the font program, if any */ 1322 FT_ULong font_program_size; 1323 FT_Byte* font_program; 1324 1325 /* the cvt program, if any */ 1326 FT_ULong cvt_program_size; 1327 FT_Byte* cvt_program; 1328 1329 /* the original, unscaled, control value table */ 1330 FT_ULong cvt_size; 1331 FT_Short* cvt; 1332 1333 /* A pointer to the bytecode interpreter to use. This is also */ 1334 /* used to hook the debugger for the `ttdebug' utility. */ 1335 TT_Interpreter interpreter; 1336 1337 #ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING 1338 /* Use unpatented hinting only. */ 1339 FT_Bool unpatented_hinting; 1340 #endif 1341 1342 /***********************************************************************/ 1343 /* */ 1344 /* Other tables or fields. This is used by derivative formats like */ 1345 /* OpenType. */ 1346 /* */ 1347 /***********************************************************************/ 1348 1349 FT_Generic extra; 1350 1351 const char* postscript_name; 1352 1353 FT_ULong glyf_len; 1354 1355 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT 1356 FT_Bool doblend; 1357 GX_Blend blend; 1358 #endif 1359 1360 /* since version 2.2 */ 1361 1362 FT_Byte* horz_metrics; 1363 FT_ULong horz_metrics_size; 1364 1365 FT_Byte* vert_metrics; 1366 FT_ULong vert_metrics_size; 1367 1368 FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */ 1369 FT_Byte* glyph_locations; 1370 1371 FT_Byte* hdmx_table; 1372 FT_ULong hdmx_table_size; 1373 FT_UInt hdmx_record_count; 1374 FT_ULong hdmx_record_size; 1375 FT_Byte* hdmx_record_sizes; 1376 1377 FT_Byte* sbit_table; 1378 FT_ULong sbit_table_size; 1379 TT_SbitTableType sbit_table_type; 1380 FT_UInt sbit_num_strikes; 1381 1382 FT_Byte* kern_table; 1383 FT_ULong kern_table_size; 1384 FT_UInt num_kern_tables; 1385 FT_UInt32 kern_avail_bits; 1386 FT_UInt32 kern_order_bits; 1387 1388 #ifdef TT_CONFIG_OPTION_BDF 1389 TT_BDFRec bdf; 1390 #endif /* TT_CONFIG_OPTION_BDF */ 1391 1392 /* since 2.3.0 */ 1393 FT_ULong horz_metrics_offset; 1394 FT_ULong vert_metrics_offset; 1395 1396 #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING 1397 /* since 2.4.12 */ 1398 FT_ULong sph_found_func_flags; /* special functions found */ 1399 /* for this face */ 1400 FT_Bool sph_compatibility_mode; 1401 #endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ 1402 1403 } TT_FaceRec; 1404 1405 1406 /*************************************************************************/ 1407 /* */ 1408 /* <Struct> */ 1409 /* TT_GlyphZoneRec */ 1410 /* */ 1411 /* <Description> */ 1412 /* A glyph zone is used to load, scale and hint glyph outline */ 1413 /* coordinates. */ 1414 /* */ 1415 /* <Fields> */ 1416 /* memory :: A handle to the memory manager. */ 1417 /* */ 1418 /* max_points :: The maximum size in points of the zone. */ 1419 /* */ 1420 /* max_contours :: Max size in links contours of the zone. */ 1421 /* */ 1422 /* n_points :: The current number of points in the zone. */ 1423 /* */ 1424 /* n_contours :: The current number of contours in the zone. */ 1425 /* */ 1426 /* org :: The original glyph coordinates (font */ 1427 /* units/scaled). */ 1428 /* */ 1429 /* cur :: The current glyph coordinates (scaled/hinted). */ 1430 /* */ 1431 /* tags :: The point control tags. */ 1432 /* */ 1433 /* contours :: The contours end points. */ 1434 /* */ 1435 /* first_point :: Offset of the current subglyph's first point. */ 1436 /* */ 1437 typedef struct TT_GlyphZoneRec_ 1438 { 1439 FT_Memory memory; 1440 FT_UShort max_points; 1441 FT_Short max_contours; 1442 FT_UShort n_points; /* number of points in zone */ 1443 FT_Short n_contours; /* number of contours */ 1444 1445 FT_Vector* org; /* original point coordinates */ 1446 FT_Vector* cur; /* current point coordinates */ 1447 FT_Vector* orus; /* original (unscaled) point coordinates */ 1448 1449 FT_Byte* tags; /* current touch flags */ 1450 FT_UShort* contours; /* contour end points */ 1451 1452 FT_UShort first_point; /* offset of first (#0) point */ 1453 1454 } TT_GlyphZoneRec, *TT_GlyphZone; 1455 1456 1457 /* handle to execution context */ 1458 typedef struct TT_ExecContextRec_* TT_ExecContext; 1459 1460 1461 /*************************************************************************/ 1462 /* */ 1463 /* <Type> */ 1464 /* TT_Size */ 1465 /* */ 1466 /* <Description> */ 1467 /* A handle to a TrueType size object. */ 1468 /* */ 1469 typedef struct TT_SizeRec_* TT_Size; 1470 1471 1472 /* glyph loader structure */ 1473 typedef struct TT_LoaderRec_ 1474 { 1475 TT_Face face; 1476 TT_Size size; 1477 FT_GlyphSlot glyph; 1478 FT_GlyphLoader gloader; 1479 1480 FT_ULong load_flags; 1481 FT_UInt glyph_index; 1482 1483 FT_Stream stream; 1484 FT_Int byte_len; 1485 1486 FT_Short n_contours; 1487 FT_BBox bbox; 1488 FT_Int left_bearing; 1489 FT_Int advance; 1490 FT_Int linear; 1491 FT_Bool linear_def; 1492 FT_Vector pp1; 1493 FT_Vector pp2; 1494 1495 FT_ULong glyf_offset; 1496 1497 /* the zone where we load our glyphs */ 1498 TT_GlyphZoneRec base; 1499 TT_GlyphZoneRec zone; 1500 1501 TT_ExecContext exec; 1502 FT_Byte* instructions; 1503 FT_ULong ins_pos; 1504 1505 /* for possible extensibility in other formats */ 1506 void* other; 1507 1508 /* since version 2.1.8 */ 1509 FT_Int top_bearing; 1510 FT_Int vadvance; 1511 FT_Vector pp3; 1512 FT_Vector pp4; 1513 1514 /* since version 2.2.1 */ 1515 FT_Byte* cursor; 1516 FT_Byte* limit; 1517 1518 } TT_LoaderRec; 1519 1520 1521 FT_END_HEADER 1522 1523 #endif /* __TTTYPES_H__ */ 1524 1525 1526 /* END */ 1527