1/***************************************************************************/ 2/* */ 3/* tttables.h */ 4/* */ 5/* Basic SFNT/TrueType tables definitions and interface */ 6/* (specification only). */ 7/* */ 8/* Copyright 1996-2005, 2008-2012 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 __TTTABLES_H__ 21#define __TTTABLES_H__ 22 23 24#include "../ft2build.h" 25#include "freetype.h" 26 27#ifdef FREETYPE_H 28#error "freetype.h of FreeType 1 has been loaded!" 29#error "Please fix the directory search order for header files" 30#error "so that freetype.h of FreeType 2 is found first." 31#endif 32 33 34FT_BEGIN_HEADER 35 36 /*************************************************************************/ 37 /* */ 38 /* <Section> */ 39 /* truetype_tables */ 40 /* */ 41 /* <Title> */ 42 /* TrueType Tables */ 43 /* */ 44 /* <Abstract> */ 45 /* TrueType specific table types and functions. */ 46 /* */ 47 /* <Description> */ 48 /* This section contains the definition of TrueType-specific tables */ 49 /* as well as some routines used to access and process them. */ 50 /* */ 51 /*************************************************************************/ 52 53 54 /*************************************************************************/ 55 /* */ 56 /* <Struct> */ 57 /* TT_Header */ 58 /* */ 59 /* <Description> */ 60 /* A structure used to model a TrueType font header table. All */ 61 /* fields follow the TrueType specification. */ 62 /* */ 63 typedef struct TT_Header_ 64 { 65 FT_Fixed Table_Version; 66 FT_Fixed Font_Revision; 67 68 FT_Long CheckSum_Adjust; 69 FT_Long Magic_Number; 70 71 FT_UShort Flags; 72 FT_UShort Units_Per_EM; 73 74 FT_Long Created [2]; 75 FT_Long Modified[2]; 76 77 FT_Short xMin; 78 FT_Short yMin; 79 FT_Short xMax; 80 FT_Short yMax; 81 82 FT_UShort Mac_Style; 83 FT_UShort Lowest_Rec_PPEM; 84 85 FT_Short Font_Direction; 86 FT_Short Index_To_Loc_Format; 87 FT_Short Glyph_Data_Format; 88 89 } TT_Header; 90 91 92 /*************************************************************************/ 93 /* */ 94 /* <Struct> */ 95 /* TT_HoriHeader */ 96 /* */ 97 /* <Description> */ 98 /* A structure used to model a TrueType horizontal header, the `hhea' */ 99 /* table, as well as the corresponding horizontal metrics table, */ 100 /* i.e., the `hmtx' table. */ 101 /* */ 102 /* <Fields> */ 103 /* Version :: The table version. */ 104 /* */ 105 /* Ascender :: The font's ascender, i.e., the distance */ 106 /* from the baseline to the top-most of all */ 107 /* glyph points found in the font. */ 108 /* */ 109 /* This value is invalid in many fonts, as */ 110 /* it is usually set by the font designer, */ 111 /* and often reflects only a portion of the */ 112 /* glyphs found in the font (maybe ASCII). */ 113 /* */ 114 /* You should use the `sTypoAscender' field */ 115 /* of the OS/2 table instead if you want */ 116 /* the correct one. */ 117 /* */ 118 /* Descender :: The font's descender, i.e., the distance */ 119 /* from the baseline to the bottom-most of */ 120 /* all glyph points found in the font. It */ 121 /* is negative. */ 122 /* */ 123 /* This value is invalid in many fonts, as */ 124 /* it is usually set by the font designer, */ 125 /* and often reflects only a portion of the */ 126 /* glyphs found in the font (maybe ASCII). */ 127 /* */ 128 /* You should use the `sTypoDescender' */ 129 /* field of the OS/2 table instead if you */ 130 /* want the correct one. */ 131 /* */ 132 /* Line_Gap :: The font's line gap, i.e., the distance */ 133 /* to add to the ascender and descender to */ 134 /* get the BTB, i.e., the */ 135 /* baseline-to-baseline distance for the */ 136 /* font. */ 137 /* */ 138 /* advance_Width_Max :: This field is the maximum of all advance */ 139 /* widths found in the font. It can be */ 140 /* used to compute the maximum width of an */ 141 /* arbitrary string of text. */ 142 /* */ 143 /* min_Left_Side_Bearing :: The minimum left side bearing of all */ 144 /* glyphs within the font. */ 145 /* */ 146 /* min_Right_Side_Bearing :: The minimum right side bearing of all */ 147 /* glyphs within the font. */ 148 /* */ 149 /* xMax_Extent :: The maximum horizontal extent (i.e., the */ 150 /* `width' of a glyph's bounding box) for */ 151 /* all glyphs in the font. */ 152 /* */ 153 /* caret_Slope_Rise :: The rise coefficient of the cursor's */ 154 /* slope of the cursor (slope=rise/run). */ 155 /* */ 156 /* caret_Slope_Run :: The run coefficient of the cursor's */ 157 /* slope. */ 158 /* */ 159 /* Reserved :: 8~reserved bytes. */ 160 /* */ 161 /* metric_Data_Format :: Always~0. */ 162 /* */ 163 /* number_Of_HMetrics :: Number of HMetrics entries in the `hmtx' */ 164 /* table -- this value can be smaller than */ 165 /* the total number of glyphs in the font. */ 166 /* */ 167 /* long_metrics :: A pointer into the `hmtx' table. */ 168 /* */ 169 /* short_metrics :: A pointer into the `hmtx' table. */ 170 /* */ 171 /* <Note> */ 172 /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */ 173 /* be identical except for the names of their fields which */ 174 /* are different. */ 175 /* */ 176 /* This ensures that a single function in the `ttload' */ 177 /* module is able to read both the horizontal and vertical */ 178 /* headers. */ 179 /* */ 180 typedef struct TT_HoriHeader_ 181 { 182 FT_Fixed Version; 183 FT_Short Ascender; 184 FT_Short Descender; 185 FT_Short Line_Gap; 186 187 FT_UShort advance_Width_Max; /* advance width maximum */ 188 189 FT_Short min_Left_Side_Bearing; /* minimum left-sb */ 190 FT_Short min_Right_Side_Bearing; /* minimum right-sb */ 191 FT_Short xMax_Extent; /* xmax extents */ 192 FT_Short caret_Slope_Rise; 193 FT_Short caret_Slope_Run; 194 FT_Short caret_Offset; 195 196 FT_Short Reserved[4]; 197 198 FT_Short metric_Data_Format; 199 FT_UShort number_Of_HMetrics; 200 201 /* The following fields are not defined by the TrueType specification */ 202 /* but they are used to connect the metrics header to the relevant */ 203 /* `HMTX' table. */ 204 205 void* long_metrics; 206 void* short_metrics; 207 208 } TT_HoriHeader; 209 210 211 /*************************************************************************/ 212 /* */ 213 /* <Struct> */ 214 /* TT_VertHeader */ 215 /* */ 216 /* <Description> */ 217 /* A structure used to model a TrueType vertical header, the `vhea' */ 218 /* table, as well as the corresponding vertical metrics table, i.e., */ 219 /* the `vmtx' table. */ 220 /* */ 221 /* <Fields> */ 222 /* Version :: The table version. */ 223 /* */ 224 /* Ascender :: The font's ascender, i.e., the distance */ 225 /* from the baseline to the top-most of */ 226 /* all glyph points found in the font. */ 227 /* */ 228 /* This value is invalid in many fonts, as */ 229 /* it is usually set by the font designer, */ 230 /* and often reflects only a portion of */ 231 /* the glyphs found in the font (maybe */ 232 /* ASCII). */ 233 /* */ 234 /* You should use the `sTypoAscender' */ 235 /* field of the OS/2 table instead if you */ 236 /* want the correct one. */ 237 /* */ 238 /* Descender :: The font's descender, i.e., the */ 239 /* distance from the baseline to the */ 240 /* bottom-most of all glyph points found */ 241 /* in the font. It is negative. */ 242 /* */ 243 /* This value is invalid in many fonts, as */ 244 /* it is usually set by the font designer, */ 245 /* and often reflects only a portion of */ 246 /* the glyphs found in the font (maybe */ 247 /* ASCII). */ 248 /* */ 249 /* You should use the `sTypoDescender' */ 250 /* field of the OS/2 table instead if you */ 251 /* want the correct one. */ 252 /* */ 253 /* Line_Gap :: The font's line gap, i.e., the distance */ 254 /* to add to the ascender and descender to */ 255 /* get the BTB, i.e., the */ 256 /* baseline-to-baseline distance for the */ 257 /* font. */ 258 /* */ 259 /* advance_Height_Max :: This field is the maximum of all */ 260 /* advance heights found in the font. It */ 261 /* can be used to compute the maximum */ 262 /* height of an arbitrary string of text. */ 263 /* */ 264 /* min_Top_Side_Bearing :: The minimum top side bearing of all */ 265 /* glyphs within the font. */ 266 /* */ 267 /* min_Bottom_Side_Bearing :: The minimum bottom side bearing of all */ 268 /* glyphs within the font. */ 269 /* */ 270 /* yMax_Extent :: The maximum vertical extent (i.e., the */ 271 /* `height' of a glyph's bounding box) for */ 272 /* all glyphs in the font. */ 273 /* */ 274 /* caret_Slope_Rise :: The rise coefficient of the cursor's */ 275 /* slope of the cursor (slope=rise/run). */ 276 /* */ 277 /* caret_Slope_Run :: The run coefficient of the cursor's */ 278 /* slope. */ 279 /* */ 280 /* caret_Offset :: The cursor's offset for slanted fonts. */ 281 /* This value is `reserved' in vmtx */ 282 /* version 1.0. */ 283 /* */ 284 /* Reserved :: 8~reserved bytes. */ 285 /* */ 286 /* metric_Data_Format :: Always~0. */ 287 /* */ 288 /* number_Of_HMetrics :: Number of VMetrics entries in the */ 289 /* `vmtx' table -- this value can be */ 290 /* smaller than the total number of glyphs */ 291 /* in the font. */ 292 /* */ 293 /* long_metrics :: A pointer into the `vmtx' table. */ 294 /* */ 295 /* short_metrics :: A pointer into the `vmtx' table. */ 296 /* */ 297 /* <Note> */ 298 /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */ 299 /* be identical except for the names of their fields which */ 300 /* are different. */ 301 /* */ 302 /* This ensures that a single function in the `ttload' */ 303 /* module is able to read both the horizontal and vertical */ 304 /* headers. */ 305 /* */ 306 typedef struct TT_VertHeader_ 307 { 308 FT_Fixed Version; 309 FT_Short Ascender; 310 FT_Short Descender; 311 FT_Short Line_Gap; 312 313 FT_UShort advance_Height_Max; /* advance height maximum */ 314 315 FT_Short min_Top_Side_Bearing; /* minimum left-sb or top-sb */ 316 FT_Short min_Bottom_Side_Bearing; /* minimum right-sb or bottom-sb */ 317 FT_Short yMax_Extent; /* xmax or ymax extents */ 318 FT_Short caret_Slope_Rise; 319 FT_Short caret_Slope_Run; 320 FT_Short caret_Offset; 321 322 FT_Short Reserved[4]; 323 324 FT_Short metric_Data_Format; 325 FT_UShort number_Of_VMetrics; 326 327 /* The following fields are not defined by the TrueType specification */ 328 /* but they're used to connect the metrics header to the relevant */ 329 /* `HMTX' or `VMTX' table. */ 330 331 void* long_metrics; 332 void* short_metrics; 333 334 } TT_VertHeader; 335 336 337 /*************************************************************************/ 338 /* */ 339 /* <Struct> */ 340 /* TT_OS2 */ 341 /* */ 342 /* <Description> */ 343 /* A structure used to model a TrueType OS/2 table. This is the long */ 344 /* table version. All fields comply to the TrueType specification. */ 345 /* */ 346 /* Note that we now support old Mac fonts which do not include an */ 347 /* OS/2 table. In this case, the `version' field is always set to */ 348 /* 0xFFFF. */ 349 /* */ 350 typedef struct TT_OS2_ 351 { 352 FT_UShort version; /* 0x0001 - more or 0xFFFF */ 353 FT_Short xAvgCharWidth; 354 FT_UShort usWeightClass; 355 FT_UShort usWidthClass; 356 FT_Short fsType; 357 FT_Short ySubscriptXSize; 358 FT_Short ySubscriptYSize; 359 FT_Short ySubscriptXOffset; 360 FT_Short ySubscriptYOffset; 361 FT_Short ySuperscriptXSize; 362 FT_Short ySuperscriptYSize; 363 FT_Short ySuperscriptXOffset; 364 FT_Short ySuperscriptYOffset; 365 FT_Short yStrikeoutSize; 366 FT_Short yStrikeoutPosition; 367 FT_Short sFamilyClass; 368 369 FT_Byte panose[10]; 370 371 FT_ULong ulUnicodeRange1; /* Bits 0-31 */ 372 FT_ULong ulUnicodeRange2; /* Bits 32-63 */ 373 FT_ULong ulUnicodeRange3; /* Bits 64-95 */ 374 FT_ULong ulUnicodeRange4; /* Bits 96-127 */ 375 376 FT_Char achVendID[4]; 377 378 FT_UShort fsSelection; 379 FT_UShort usFirstCharIndex; 380 FT_UShort usLastCharIndex; 381 FT_Short sTypoAscender; 382 FT_Short sTypoDescender; 383 FT_Short sTypoLineGap; 384 FT_UShort usWinAscent; 385 FT_UShort usWinDescent; 386 387 /* only version 1 tables: */ 388 389 FT_ULong ulCodePageRange1; /* Bits 0-31 */ 390 FT_ULong ulCodePageRange2; /* Bits 32-63 */ 391 392 /* only version 2 tables: */ 393 394 FT_Short sxHeight; 395 FT_Short sCapHeight; 396 FT_UShort usDefaultChar; 397 FT_UShort usBreakChar; 398 FT_UShort usMaxContext; 399 400 } TT_OS2; 401 402 403 /*************************************************************************/ 404 /* */ 405 /* <Struct> */ 406 /* TT_Postscript */ 407 /* */ 408 /* <Description> */ 409 /* A structure used to model a TrueType PostScript table. All fields */ 410 /* comply to the TrueType specification. This structure does not */ 411 /* reference the PostScript glyph names, which can be nevertheless */ 412 /* accessed with the `ttpost' module. */ 413 /* */ 414 typedef struct TT_Postscript_ 415 { 416 FT_Fixed FormatType; 417 FT_Fixed italicAngle; 418 FT_Short underlinePosition; 419 FT_Short underlineThickness; 420 FT_ULong isFixedPitch; 421 FT_ULong minMemType42; 422 FT_ULong maxMemType42; 423 FT_ULong minMemType1; 424 FT_ULong maxMemType1; 425 426 /* Glyph names follow in the file, but we don't */ 427 /* load them by default. See the ttpost.c file. */ 428 429 } TT_Postscript; 430 431 432 /*************************************************************************/ 433 /* */ 434 /* <Struct> */ 435 /* TT_PCLT */ 436 /* */ 437 /* <Description> */ 438 /* A structure used to model a TrueType PCLT table. All fields */ 439 /* comply to the TrueType specification. */ 440 /* */ 441 typedef struct TT_PCLT_ 442 { 443 FT_Fixed Version; 444 FT_ULong FontNumber; 445 FT_UShort Pitch; 446 FT_UShort xHeight; 447 FT_UShort Style; 448 FT_UShort TypeFamily; 449 FT_UShort CapHeight; 450 FT_UShort SymbolSet; 451 FT_Char TypeFace[16]; 452 FT_Char CharacterComplement[8]; 453 FT_Char FileName[6]; 454 FT_Char StrokeWeight; 455 FT_Char WidthType; 456 FT_Byte SerifStyle; 457 FT_Byte Reserved; 458 459 } TT_PCLT; 460 461 462 /*************************************************************************/ 463 /* */ 464 /* <Struct> */ 465 /* TT_MaxProfile */ 466 /* */ 467 /* <Description> */ 468 /* The maximum profile is a table containing many max values which */ 469 /* can be used to pre-allocate arrays. This ensures that no memory */ 470 /* allocation occurs during a glyph load. */ 471 /* */ 472 /* <Fields> */ 473 /* version :: The version number. */ 474 /* */ 475 /* numGlyphs :: The number of glyphs in this TrueType */ 476 /* font. */ 477 /* */ 478 /* maxPoints :: The maximum number of points in a */ 479 /* non-composite TrueType glyph. See also */ 480 /* the structure element */ 481 /* `maxCompositePoints'. */ 482 /* */ 483 /* maxContours :: The maximum number of contours in a */ 484 /* non-composite TrueType glyph. See also */ 485 /* the structure element */ 486 /* `maxCompositeContours'. */ 487 /* */ 488 /* maxCompositePoints :: The maximum number of points in a */ 489 /* composite TrueType glyph. See also the */ 490 /* structure element `maxPoints'. */ 491 /* */ 492 /* maxCompositeContours :: The maximum number of contours in a */ 493 /* composite TrueType glyph. See also the */ 494 /* structure element `maxContours'. */ 495 /* */ 496 /* maxZones :: The maximum number of zones used for */ 497 /* glyph hinting. */ 498 /* */ 499 /* maxTwilightPoints :: The maximum number of points in the */ 500 /* twilight zone used for glyph hinting. */ 501 /* */ 502 /* maxStorage :: The maximum number of elements in the */ 503 /* storage area used for glyph hinting. */ 504 /* */ 505 /* maxFunctionDefs :: The maximum number of function */ 506 /* definitions in the TrueType bytecode for */ 507 /* this font. */ 508 /* */ 509 /* maxInstructionDefs :: The maximum number of instruction */ 510 /* definitions in the TrueType bytecode for */ 511 /* this font. */ 512 /* */ 513 /* maxStackElements :: The maximum number of stack elements used */ 514 /* during bytecode interpretation. */ 515 /* */ 516 /* maxSizeOfInstructions :: The maximum number of TrueType opcodes */ 517 /* used for glyph hinting. */ 518 /* */ 519 /* maxComponentElements :: The maximum number of simple (i.e., non- */ 520 /* composite) glyphs in a composite glyph. */ 521 /* */ 522 /* maxComponentDepth :: The maximum nesting depth of composite */ 523 /* glyphs. */ 524 /* */ 525 /* <Note> */ 526 /* This structure is only used during font loading. */ 527 /* */ 528 typedef struct TT_MaxProfile_ 529 { 530 FT_Fixed version; 531 FT_UShort numGlyphs; 532 FT_UShort maxPoints; 533 FT_UShort maxContours; 534 FT_UShort maxCompositePoints; 535 FT_UShort maxCompositeContours; 536 FT_UShort maxZones; 537 FT_UShort maxTwilightPoints; 538 FT_UShort maxStorage; 539 FT_UShort maxFunctionDefs; 540 FT_UShort maxInstructionDefs; 541 FT_UShort maxStackElements; 542 FT_UShort maxSizeOfInstructions; 543 FT_UShort maxComponentElements; 544 FT_UShort maxComponentDepth; 545 546 } TT_MaxProfile; 547 548 549 /*************************************************************************/ 550 /* */ 551 /* <Enum> */ 552 /* FT_Sfnt_Tag */ 553 /* */ 554 /* <Description> */ 555 /* An enumeration used to specify the index of an SFNT table. */ 556 /* Used in the @FT_Get_Sfnt_Table API function. */ 557 /* */ 558 typedef enum FT_Sfnt_Tag_ 559 { 560 ft_sfnt_head = 0, /* TT_Header */ 561 ft_sfnt_maxp = 1, /* TT_MaxProfile */ 562 ft_sfnt_os2 = 2, /* TT_OS2 */ 563 ft_sfnt_hhea = 3, /* TT_HoriHeader */ 564 ft_sfnt_vhea = 4, /* TT_VertHeader */ 565 ft_sfnt_post = 5, /* TT_Postscript */ 566 ft_sfnt_pclt = 6, /* TT_PCLT */ 567 568 sfnt_max /* internal end mark */ 569 570 } FT_Sfnt_Tag; 571 572 /* */ 573 574 575 /*************************************************************************/ 576 /* */ 577 /* <Function> */ 578 /* FT_Get_Sfnt_Table */ 579 /* */ 580 /* <Description> */ 581 /* Return a pointer to a given SFNT table within a face. */ 582 /* */ 583 /* <Input> */ 584 /* face :: A handle to the source. */ 585 /* */ 586 /* tag :: The index of the SFNT table. */ 587 /* */ 588 /* <Return> */ 589 /* A type-less pointer to the table. This will be~0 in case of */ 590 /* error, or if the corresponding table was not found *OR* loaded */ 591 /* from the file. */ 592 /* */ 593 /* Use a typecast according to `tag' to access the structure */ 594 /* elements. */ 595 /* */ 596 /* <Note> */ 597 /* The table is owned by the face object and disappears with it. */ 598 /* */ 599 /* This function is only useful to access SFNT tables that are loaded */ 600 /* by the sfnt, truetype, and opentype drivers. See @FT_Sfnt_Tag for */ 601 /* a list. */ 602 /* */ 603 /* Here an example how to access the `vhea' table: */ 604 /* */ 605 /* { */ 606 /* TT_VertHeader* vert_header; */ 607 /* */ 608 /* */ 609 /* vert_header = */ 610 /* (TT_VertHeader*)FT_Get_Sfnt_Table( face, ft_sfnt_vhea ); */ 611 /* } */ 612 /* */ 613 FT_EXPORT( void* ) 614 FT_Get_Sfnt_Table( FT_Face face, 615 FT_Sfnt_Tag tag ); 616 617 618 /************************************************************************** 619 * 620 * @function: 621 * FT_Load_Sfnt_Table 622 * 623 * @description: 624 * Load any font table into client memory. 625 * 626 * @input: 627 * face :: 628 * A handle to the source face. 629 * 630 * tag :: 631 * The four-byte tag of the table to load. Use the value~0 if you want 632 * to access the whole font file. Otherwise, you can use one of the 633 * definitions found in the @FT_TRUETYPE_TAGS_H file, or forge a new 634 * one with @FT_MAKE_TAG. 635 * 636 * offset :: 637 * The starting offset in the table (or file if tag == 0). 638 * 639 * @output: 640 * buffer :: 641 * The target buffer address. The client must ensure that the memory 642 * array is big enough to hold the data. 643 * 644 * @inout: 645 * length :: 646 * If the `length' parameter is NULL, then try to load the whole table. 647 * Return an error code if it fails. 648 * 649 * Else, if `*length' is~0, exit immediately while returning the 650 * table's (or file) full size in it. 651 * 652 * Else the number of bytes to read from the table or file, from the 653 * starting offset. 654 * 655 * @return: 656 * FreeType error code. 0~means success. 657 * 658 * @note: 659 * If you need to determine the table's length you should first call this 660 * function with `*length' set to~0, as in the following example: 661 * 662 * { 663 * FT_ULong length = 0; 664 * 665 * 666 * error = FT_Load_Sfnt_Table( face, tag, 0, NULL, &length ); 667 * if ( error ) { ... table does not exist ... } 668 * 669 * buffer = malloc( length ); 670 * if ( buffer == NULL ) { ... not enough memory ... } 671 * 672 * error = FT_Load_Sfnt_Table( face, tag, 0, buffer, &length ); 673 * if ( error ) { ... could not load table ... } 674 * } 675 */ 676 FT_EXPORT( FT_Error ) 677 FT_Load_Sfnt_Table( FT_Face face, 678 FT_ULong tag, 679 FT_Long offset, 680 FT_Byte* buffer, 681 FT_ULong* length ); 682 683 684 /************************************************************************** 685 * 686 * @function: 687 * FT_Sfnt_Table_Info 688 * 689 * @description: 690 * Return information on an SFNT table. 691 * 692 * @input: 693 * face :: 694 * A handle to the source face. 695 * 696 * table_index :: 697 * The index of an SFNT table. The function returns 698 * FT_Err_Table_Missing for an invalid value. 699 * 700 * @inout: 701 * tag :: 702 * The name tag of the SFNT table. If the value is NULL, `table_index' 703 * is ignored, and `length' returns the number of SFNT tables in the 704 * font. 705 * 706 * @output: 707 * length :: 708 * The length of the SFNT table (or the number of SFNT tables, depending 709 * on `tag'). 710 * 711 * @return: 712 * FreeType error code. 0~means success. 713 * 714 * @note: 715 * While parsing fonts, FreeType handles SFNT tables with length zero as 716 * missing. 717 * 718 */ 719 FT_EXPORT( FT_Error ) 720 FT_Sfnt_Table_Info( FT_Face face, 721 FT_UInt table_index, 722 FT_ULong *tag, 723 FT_ULong *length ); 724 725 726 /*************************************************************************/ 727 /* */ 728 /* <Function> */ 729 /* FT_Get_CMap_Language_ID */ 730 /* */ 731 /* <Description> */ 732 /* Return TrueType/sfnt specific cmap language ID. Definitions of */ 733 /* language ID values are in `freetype/ttnameid.h'. */ 734 /* */ 735 /* <Input> */ 736 /* charmap :: */ 737 /* The target charmap. */ 738 /* */ 739 /* <Return> */ 740 /* The language ID of `charmap'. If `charmap' doesn't belong to a */ 741 /* TrueType/sfnt face, just return~0 as the default value. */ 742 /* */ 743 /* For a format~14 cmap (to access Unicode IVS), the return value is */ 744 /* 0xFFFFFFFF. */ 745 /* */ 746 FT_EXPORT( FT_ULong ) 747 FT_Get_CMap_Language_ID( FT_CharMap charmap ); 748 749 750 /*************************************************************************/ 751 /* */ 752 /* <Function> */ 753 /* FT_Get_CMap_Format */ 754 /* */ 755 /* <Description> */ 756 /* Return TrueType/sfnt specific cmap format. */ 757 /* */ 758 /* <Input> */ 759 /* charmap :: */ 760 /* The target charmap. */ 761 /* */ 762 /* <Return> */ 763 /* The format of `charmap'. If `charmap' doesn't belong to a */ 764 /* TrueType/sfnt face, return -1. */ 765 /* */ 766 FT_EXPORT( FT_Long ) 767 FT_Get_CMap_Format( FT_CharMap charmap ); 768 769 /* */ 770 771 772FT_END_HEADER 773 774#endif /* __TTTABLES_H__ */ 775 776 777/* END */ 778