1/***************************************************************************/ 2/* */ 3/* tttables.h */ 4/* */ 5/* Basic SFNT/TrueType tables definitions and interface */ 6/* (specification only). */ 7/* */ 8/* Copyright 1996-2005, 2008-2013 by */ 9/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 10/* */ 11/* This file is part of the FreeType project, and may only be used, */ 12/* modified, and distributed under the terms of the FreeType project */ 13/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 14/* this file you indicate that you have read the license and */ 15/* understand and accept it fully. */ 16/* */ 17/***************************************************************************/ 18 19 20#ifndef __TTTABLES_H__ 21#define __TTTABLES_H__ 22 23 24#include <ft2build.h> 25#include FT_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, */ 174 /* which 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, */ 300 /* which 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. All fields */ 344 /* comply to the OpenType specification. */ 345 /* */ 346 /* Note that we now support old Mac fonts that do not include an OS/2 */ 347 /* table. In this case, the `version' field is always set to 0xFFFF. */ 348 /* */ 349 typedef struct TT_OS2_ 350 { 351 FT_UShort version; /* 0x0001 - more or 0xFFFF */ 352 FT_Short xAvgCharWidth; 353 FT_UShort usWeightClass; 354 FT_UShort usWidthClass; 355 FT_Short fsType; 356 FT_Short ySubscriptXSize; 357 FT_Short ySubscriptYSize; 358 FT_Short ySubscriptXOffset; 359 FT_Short ySubscriptYOffset; 360 FT_Short ySuperscriptXSize; 361 FT_Short ySuperscriptYSize; 362 FT_Short ySuperscriptXOffset; 363 FT_Short ySuperscriptYOffset; 364 FT_Short yStrikeoutSize; 365 FT_Short yStrikeoutPosition; 366 FT_Short sFamilyClass; 367 368 FT_Byte panose[10]; 369 370 FT_ULong ulUnicodeRange1; /* Bits 0-31 */ 371 FT_ULong ulUnicodeRange2; /* Bits 32-63 */ 372 FT_ULong ulUnicodeRange3; /* Bits 64-95 */ 373 FT_ULong ulUnicodeRange4; /* Bits 96-127 */ 374 375 FT_Char achVendID[4]; 376 377 FT_UShort fsSelection; 378 FT_UShort usFirstCharIndex; 379 FT_UShort usLastCharIndex; 380 FT_Short sTypoAscender; 381 FT_Short sTypoDescender; 382 FT_Short sTypoLineGap; 383 FT_UShort usWinAscent; 384 FT_UShort usWinDescent; 385 386 /* only version 1 and higher: */ 387 388 FT_ULong ulCodePageRange1; /* Bits 0-31 */ 389 FT_ULong ulCodePageRange2; /* Bits 32-63 */ 390 391 /* only version 2 and higher: */ 392 393 FT_Short sxHeight; 394 FT_Short sCapHeight; 395 FT_UShort usDefaultChar; 396 FT_UShort usBreakChar; 397 FT_UShort usMaxContext; 398 399 /* only version 5 and higher: */ 400 401 FT_UShort usLowerOpticalPointSize; /* in twips (1/20th points) */ 402 FT_UShort usUpperOpticalPointSize; /* in twips (1/20th points) */ 403 404 } TT_OS2; 405 406 407 /*************************************************************************/ 408 /* */ 409 /* <Struct> */ 410 /* TT_Postscript */ 411 /* */ 412 /* <Description> */ 413 /* A structure used to model a TrueType PostScript table. All fields */ 414 /* comply to the TrueType specification. This structure does not */ 415 /* reference the PostScript glyph names, which can be nevertheless */ 416 /* accessed with the `ttpost' module. */ 417 /* */ 418 typedef struct TT_Postscript_ 419 { 420 FT_Fixed FormatType; 421 FT_Fixed italicAngle; 422 FT_Short underlinePosition; 423 FT_Short underlineThickness; 424 FT_ULong isFixedPitch; 425 FT_ULong minMemType42; 426 FT_ULong maxMemType42; 427 FT_ULong minMemType1; 428 FT_ULong maxMemType1; 429 430 /* Glyph names follow in the file, but we don't */ 431 /* load them by default. See the ttpost.c file. */ 432 433 } TT_Postscript; 434 435 436 /*************************************************************************/ 437 /* */ 438 /* <Struct> */ 439 /* TT_PCLT */ 440 /* */ 441 /* <Description> */ 442 /* A structure used to model a TrueType PCLT table. All fields */ 443 /* comply to the TrueType specification. */ 444 /* */ 445 typedef struct TT_PCLT_ 446 { 447 FT_Fixed Version; 448 FT_ULong FontNumber; 449 FT_UShort Pitch; 450 FT_UShort xHeight; 451 FT_UShort Style; 452 FT_UShort TypeFamily; 453 FT_UShort CapHeight; 454 FT_UShort SymbolSet; 455 FT_Char TypeFace[16]; 456 FT_Char CharacterComplement[8]; 457 FT_Char FileName[6]; 458 FT_Char StrokeWeight; 459 FT_Char WidthType; 460 FT_Byte SerifStyle; 461 FT_Byte Reserved; 462 463 } TT_PCLT; 464 465 466 /*************************************************************************/ 467 /* */ 468 /* <Struct> */ 469 /* TT_MaxProfile */ 470 /* */ 471 /* <Description> */ 472 /* The maximum profile is a table containing many max values, which */ 473 /* can be used to pre-allocate arrays. This ensures that no memory */ 474 /* allocation occurs during a glyph load. */ 475 /* */ 476 /* <Fields> */ 477 /* version :: The version number. */ 478 /* */ 479 /* numGlyphs :: The number of glyphs in this TrueType */ 480 /* font. */ 481 /* */ 482 /* maxPoints :: The maximum number of points in a */ 483 /* non-composite TrueType glyph. See also */ 484 /* the structure element */ 485 /* `maxCompositePoints'. */ 486 /* */ 487 /* maxContours :: The maximum number of contours in a */ 488 /* non-composite TrueType glyph. See also */ 489 /* the structure element */ 490 /* `maxCompositeContours'. */ 491 /* */ 492 /* maxCompositePoints :: The maximum number of points in a */ 493 /* composite TrueType glyph. See also the */ 494 /* structure element `maxPoints'. */ 495 /* */ 496 /* maxCompositeContours :: The maximum number of contours in a */ 497 /* composite TrueType glyph. See also the */ 498 /* structure element `maxContours'. */ 499 /* */ 500 /* maxZones :: The maximum number of zones used for */ 501 /* glyph hinting. */ 502 /* */ 503 /* maxTwilightPoints :: The maximum number of points in the */ 504 /* twilight zone used for glyph hinting. */ 505 /* */ 506 /* maxStorage :: The maximum number of elements in the */ 507 /* storage area used for glyph hinting. */ 508 /* */ 509 /* maxFunctionDefs :: The maximum number of function */ 510 /* definitions in the TrueType bytecode for */ 511 /* this font. */ 512 /* */ 513 /* maxInstructionDefs :: The maximum number of instruction */ 514 /* definitions in the TrueType bytecode for */ 515 /* this font. */ 516 /* */ 517 /* maxStackElements :: The maximum number of stack elements used */ 518 /* during bytecode interpretation. */ 519 /* */ 520 /* maxSizeOfInstructions :: The maximum number of TrueType opcodes */ 521 /* used for glyph hinting. */ 522 /* */ 523 /* maxComponentElements :: The maximum number of simple (i.e., non- */ 524 /* composite) glyphs in a composite glyph. */ 525 /* */ 526 /* maxComponentDepth :: The maximum nesting depth of composite */ 527 /* glyphs. */ 528 /* */ 529 /* <Note> */ 530 /* This structure is only used during font loading. */ 531 /* */ 532 typedef struct TT_MaxProfile_ 533 { 534 FT_Fixed version; 535 FT_UShort numGlyphs; 536 FT_UShort maxPoints; 537 FT_UShort maxContours; 538 FT_UShort maxCompositePoints; 539 FT_UShort maxCompositeContours; 540 FT_UShort maxZones; 541 FT_UShort maxTwilightPoints; 542 FT_UShort maxStorage; 543 FT_UShort maxFunctionDefs; 544 FT_UShort maxInstructionDefs; 545 FT_UShort maxStackElements; 546 FT_UShort maxSizeOfInstructions; 547 FT_UShort maxComponentElements; 548 FT_UShort maxComponentDepth; 549 550 } TT_MaxProfile; 551 552 553 /*************************************************************************/ 554 /* */ 555 /* <Enum> */ 556 /* FT_Sfnt_Tag */ 557 /* */ 558 /* <Description> */ 559 /* An enumeration used to specify the index of an SFNT table. */ 560 /* Used in the @FT_Get_Sfnt_Table API function. */ 561 /* */ 562 typedef enum FT_Sfnt_Tag_ 563 { 564 ft_sfnt_head = 0, /* TT_Header */ 565 ft_sfnt_maxp = 1, /* TT_MaxProfile */ 566 ft_sfnt_os2 = 2, /* TT_OS2 */ 567 ft_sfnt_hhea = 3, /* TT_HoriHeader */ 568 ft_sfnt_vhea = 4, /* TT_VertHeader */ 569 ft_sfnt_post = 5, /* TT_Postscript */ 570 ft_sfnt_pclt = 6, /* TT_PCLT */ 571 572 sfnt_max /* internal end mark */ 573 574 } FT_Sfnt_Tag; 575 576 /* */ 577 578 579 /*************************************************************************/ 580 /* */ 581 /* <Function> */ 582 /* FT_Get_Sfnt_Table */ 583 /* */ 584 /* <Description> */ 585 /* Return a pointer to a given SFNT table within a face. */ 586 /* */ 587 /* <Input> */ 588 /* face :: A handle to the source. */ 589 /* */ 590 /* tag :: The index of the SFNT table. */ 591 /* */ 592 /* <Return> */ 593 /* A type-less pointer to the table. This will be~0 in case of */ 594 /* error, or if the corresponding table was not found *OR* loaded */ 595 /* from the file. */ 596 /* */ 597 /* Use a typecast according to `tag' to access the structure */ 598 /* elements. */ 599 /* */ 600 /* <Note> */ 601 /* The table is owned by the face object and disappears with it. */ 602 /* */ 603 /* This function is only useful to access SFNT tables that are loaded */ 604 /* by the sfnt, truetype, and opentype drivers. See @FT_Sfnt_Tag for */ 605 /* a list. */ 606 /* */ 607 /* Here an example how to access the `vhea' table: */ 608 /* */ 609 /* { */ 610 /* TT_VertHeader* vert_header; */ 611 /* */ 612 /* */ 613 /* vert_header = */ 614 /* (TT_VertHeader*)FT_Get_Sfnt_Table( face, ft_sfnt_vhea ); */ 615 /* } */ 616 /* */ 617 FT_EXPORT( void* ) 618 FT_Get_Sfnt_Table( FT_Face face, 619 FT_Sfnt_Tag tag ); 620 621 622 /************************************************************************** 623 * 624 * @function: 625 * FT_Load_Sfnt_Table 626 * 627 * @description: 628 * Load any font table into client memory. 629 * 630 * @input: 631 * face :: 632 * A handle to the source face. 633 * 634 * tag :: 635 * The four-byte tag of the table to load. Use the value~0 if you want 636 * to access the whole font file. Otherwise, you can use one of the 637 * definitions found in the @FT_TRUETYPE_TAGS_H file, or forge a new 638 * one with @FT_MAKE_TAG. 639 * 640 * offset :: 641 * The starting offset in the table (or file if tag == 0). 642 * 643 * @output: 644 * buffer :: 645 * The target buffer address. The client must ensure that the memory 646 * array is big enough to hold the data. 647 * 648 * @inout: 649 * length :: 650 * If the `length' parameter is NULL, then try to load the whole table. 651 * Return an error code if it fails. 652 * 653 * Else, if `*length' is~0, exit immediately while returning the 654 * table's (or file) full size in it. 655 * 656 * Else the number of bytes to read from the table or file, from the 657 * starting offset. 658 * 659 * @return: 660 * FreeType error code. 0~means success. 661 * 662 * @note: 663 * If you need to determine the table's length you should first call this 664 * function with `*length' set to~0, as in the following example: 665 * 666 * { 667 * FT_ULong length = 0; 668 * 669 * 670 * error = FT_Load_Sfnt_Table( face, tag, 0, NULL, &length ); 671 * if ( error ) { ... table does not exist ... } 672 * 673 * buffer = malloc( length ); 674 * if ( buffer == NULL ) { ... not enough memory ... } 675 * 676 * error = FT_Load_Sfnt_Table( face, tag, 0, buffer, &length ); 677 * if ( error ) { ... could not load table ... } 678 * } 679 * 680 * Note that structures like @TT_Header or @TT_OS2 can't be used with 681 * this function; they are limited to @FT_Get_Sfnt_Table. Reason is that 682 * those structures depend on the processor architecture, with varying 683 * size (e.g. 32bit vs. 64bit) or order (big endian vs. little endian). 684 * 685 */ 686 FT_EXPORT( FT_Error ) 687 FT_Load_Sfnt_Table( FT_Face face, 688 FT_ULong tag, 689 FT_Long offset, 690 FT_Byte* buffer, 691 FT_ULong* length ); 692 693 694 /************************************************************************** 695 * 696 * @function: 697 * FT_Sfnt_Table_Info 698 * 699 * @description: 700 * Return information on an SFNT table. 701 * 702 * @input: 703 * face :: 704 * A handle to the source face. 705 * 706 * table_index :: 707 * The index of an SFNT table. The function returns 708 * FT_Err_Table_Missing for an invalid value. 709 * 710 * @inout: 711 * tag :: 712 * The name tag of the SFNT table. If the value is NULL, `table_index' 713 * is ignored, and `length' returns the number of SFNT tables in the 714 * font. 715 * 716 * @output: 717 * length :: 718 * The length of the SFNT table (or the number of SFNT tables, depending 719 * on `tag'). 720 * 721 * @return: 722 * FreeType error code. 0~means success. 723 * 724 * @note: 725 * While parsing fonts, FreeType handles SFNT tables with length zero as 726 * missing. 727 * 728 */ 729 FT_EXPORT( FT_Error ) 730 FT_Sfnt_Table_Info( FT_Face face, 731 FT_UInt table_index, 732 FT_ULong *tag, 733 FT_ULong *length ); 734 735 736 /*************************************************************************/ 737 /* */ 738 /* <Function> */ 739 /* FT_Get_CMap_Language_ID */ 740 /* */ 741 /* <Description> */ 742 /* Return TrueType/sfnt specific cmap language ID. Definitions of */ 743 /* language ID values are in `ttnameid.h'. */ 744 /* */ 745 /* <Input> */ 746 /* charmap :: */ 747 /* The target charmap. */ 748 /* */ 749 /* <Return> */ 750 /* The language ID of `charmap'. If `charmap' doesn't belong to a */ 751 /* TrueType/sfnt face, just return~0 as the default value. */ 752 /* */ 753 /* For a format~14 cmap (to access Unicode IVS), the return value is */ 754 /* 0xFFFFFFFF. */ 755 /* */ 756 FT_EXPORT( FT_ULong ) 757 FT_Get_CMap_Language_ID( FT_CharMap charmap ); 758 759 760 /*************************************************************************/ 761 /* */ 762 /* <Function> */ 763 /* FT_Get_CMap_Format */ 764 /* */ 765 /* <Description> */ 766 /* Return TrueType/sfnt specific cmap format. */ 767 /* */ 768 /* <Input> */ 769 /* charmap :: */ 770 /* The target charmap. */ 771 /* */ 772 /* <Return> */ 773 /* The format of `charmap'. If `charmap' doesn't belong to a */ 774 /* TrueType/sfnt face, return -1. */ 775 /* */ 776 FT_EXPORT( FT_Long ) 777 FT_Get_CMap_Format( FT_CharMap charmap ); 778 779 /* */ 780 781 782FT_END_HEADER 783 784#endif /* __TTTABLES_H__ */ 785 786 787/* END */ 788