QRScanner/mobile/jni/thirdparty/freetype/include/freetype/internal/tttypes.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  tttypes.h                                                              */
   4 /*                                                                         */
   5 /*    Basic SFNT/TrueType type definitions and interface (specification    */
   6 /*    only).                                                               */
   7 /*                                                                         */
   8 /*  Copyright 1996-2002, 2004-2008, 2012 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   /*    TT_LongMetricsRec                                                  */
 144   /*                                                                       */
 145   /* <Description>                                                         */
 146   /*    A structure modeling the long metrics of the `hmtx' and `vmtx'     */
 147   /*    TrueType tables.  The values are expressed in font units.          */
 148   /*                                                                       */
 149   /* <Fields>                                                              */
 150   /*    advance :: The advance width or height for the glyph.              */
 151   /*                                                                       */
 152   /*    bearing :: The left-side or top-side bearing for the glyph.        */
 153   /*                                                                       */
 154   typedef struct  TT_LongMetricsRec_
 155   {
 156     FT_UShort  advance;
 157     FT_Short   bearing;
 158
 159   } TT_LongMetricsRec, *TT_LongMetrics;
 160
 161
 162   /*************************************************************************/
 163   /*                                                                       */
 164   /* <Type>                                                                */
 165   /*    TT_ShortMetrics                                                    */
 166   /*                                                                       */
 167   /* <Description>                                                         */
 168   /*    A simple type to model the short metrics of the `hmtx' and `vmtx'  */
 169   /*    tables.                                                            */
 170   /*                                                                       */
 171   typedef FT_Short  TT_ShortMetrics;
 172
 173
 174   /*************************************************************************/
 175   /*                                                                       */
 176   /* <Struct>                                                              */
 177   /*    TT_NameEntryRec                                                    */
 178   /*                                                                       */
 179   /* <Description>                                                         */
 180   /*    A structure modeling TrueType name records.  Name records are used */
 181   /*    to store important strings like family name, style name,           */
 182   /*    copyright, etc. in _localized_ versions (i.e., language, encoding, */
 183   /*    etc).                                                              */
 184   /*                                                                       */
 185   /* <Fields>                                                              */
 186   /*    platformID   :: The ID of the name's encoding platform.            */
 187   /*                                                                       */
 188   /*    encodingID   :: The platform-specific ID for the name's encoding.  */
 189   /*                                                                       */
 190   /*    languageID   :: The platform-specific ID for the name's language.  */
 191   /*                                                                       */
 192   /*    nameID       :: The ID specifying what kind of name this is.       */
 193   /*                                                                       */
 194   /*    stringLength :: The length of the string in bytes.                 */
 195   /*                                                                       */
 196   /*    stringOffset :: The offset to the string in the `name' table.      */
 197   /*                                                                       */
 198   /*    string       :: A pointer to the string's bytes.  Note that these  */
 199   /*                    are usually UTF-16 encoded characters.             */
 200   /*                                                                       */
 201   typedef struct  TT_NameEntryRec_
 202   {
 203     FT_UShort  platformID;
 204     FT_UShort  encodingID;
 205     FT_UShort  languageID;
 206     FT_UShort  nameID;
 207     FT_UShort  stringLength;
 208     FT_ULong   stringOffset;
 209
 210     /* this last field is not defined in the spec */
 211     /* but used by the FreeType engine            */
 212
 213     FT_Byte*   string;
 214
 215   } TT_NameEntryRec, *TT_NameEntry;
 216
 217
 218   /*************************************************************************/
 219   /*                                                                       */
 220   /* <Struct>                                                              */
 221   /*    TT_NameTableRec                                                    */
 222   /*                                                                       */
 223   /* <Description>                                                         */
 224   /*    A structure modeling the TrueType name table.                      */
 225   /*                                                                       */
 226   /* <Fields>                                                              */
 227   /*    format         :: The format of the name table.                    */
 228   /*                                                                       */
 229   /*    numNameRecords :: The number of names in table.                    */
 230   /*                                                                       */
 231   /*    storageOffset  :: The offset of the name table in the `name'       */
 232   /*                      TrueType table.                                  */
 233   /*                                                                       */
 234   /*    names          :: An array of name records.                        */
 235   /*                                                                       */
 236   /*    stream         :: the file's input stream.                         */
 237   /*                                                                       */
 238   typedef struct  TT_NameTableRec_
 239   {
 240     FT_UShort         format;
 241     FT_UInt           numNameRecords;
 242     FT_UInt           storageOffset;
 243     TT_NameEntryRec*  names;
 244     FT_Stream         stream;
 245
 246   } TT_NameTableRec, *TT_NameTable;
 247
 248
 249   /*************************************************************************/
 250   /*************************************************************************/
 251   /*************************************************************************/
 252   /***                                                                   ***/
 253   /***                                                                   ***/
 254   /***             OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS         ***/
 255   /***                                                                   ***/
 256   /***                                                                   ***/
 257   /*************************************************************************/
 258   /*************************************************************************/
 259   /*************************************************************************/
 260
 261
 262   /*************************************************************************/
 263   /*                                                                       */
 264   /* <Struct>                                                              */
 265   /*    TT_GaspRangeRec                                                    */
 266   /*                                                                       */
 267   /* <Description>                                                         */
 268   /*    A tiny structure used to model a gasp range according to the       */
 269   /*    TrueType specification.                                            */
 270   /*                                                                       */
 271   /* <Fields>                                                              */
 272   /*    maxPPEM  :: The maximum ppem value to which `gaspFlag' applies.    */
 273   /*                                                                       */
 274   /*    gaspFlag :: A flag describing the grid-fitting and anti-aliasing   */
 275   /*                modes to be used.                                      */
 276   /*                                                                       */
 277   typedef struct  TT_GaspRangeRec_
 278   {
 279     FT_UShort  maxPPEM;
 280     FT_UShort  gaspFlag;
 281
 282   } TT_GaspRangeRec, *TT_GaspRange;
 283
 284
 285 #define TT_GASP_GRIDFIT  0x01
 286 #define TT_GASP_DOGRAY   0x02
 287
 288
 289   /*************************************************************************/
 290   /*                                                                       */
 291   /* <Struct>                                                              */
 292   /*    TT_GaspRec                                                         */
 293   /*                                                                       */
 294   /* <Description>                                                         */
 295   /*    A structure modeling the TrueType `gasp' table used to specify     */
 296   /*    grid-fitting and anti-aliasing behaviour.                          */
 297   /*                                                                       */
 298   /* <Fields>                                                              */
 299   /*    version    :: The version number.                                  */
 300   /*                                                                       */
 301   /*    numRanges  :: The number of gasp ranges in table.                  */
 302   /*                                                                       */
 303   /*    gaspRanges :: An array of gasp ranges.                             */
 304   /*                                                                       */
 305   typedef struct  TT_Gasp_
 306   {
 307     FT_UShort     version;
 308     FT_UShort     numRanges;
 309     TT_GaspRange  gaspRanges;
 310
 311   } TT_GaspRec;
 312
 313
 314 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
 315
 316   /*************************************************************************/
 317   /*                                                                       */
 318   /* <Struct>                                                              */
 319   /*    TT_HdmxEntryRec                                                    */
 320   /*                                                                       */
 321   /* <Description>                                                         */
 322   /*    A small structure used to model the pre-computed widths of a given */
 323   /*    size.  They are found in the `hdmx' table.                         */
 324   /*                                                                       */
 325   /* <Fields>                                                              */
 326   /*    ppem      :: The pixels per EM value at which these metrics apply. */
 327   /*                                                                       */
 328   /*    max_width :: The maximum advance width for this metric.            */
 329   /*                                                                       */
 330   /*    widths    :: An array of widths.  Note: These are 8-bit bytes.     */
 331   /*                                                                       */
 332   typedef struct  TT_HdmxEntryRec_
 333   {
 334     FT_Byte   ppem;
 335     FT_Byte   max_width;
 336     FT_Byte*  widths;
 337
 338   } TT_HdmxEntryRec, *TT_HdmxEntry;
 339
 340
 341   /*************************************************************************/
 342   /*                                                                       */
 343   /* <Struct>                                                              */
 344   /*    TT_HdmxRec                                                         */
 345   /*                                                                       */
 346   /* <Description>                                                         */
 347   /*    A structure used to model the `hdmx' table, which contains         */
 348   /*    pre-computed widths for a set of given sizes/dimensions.           */
 349   /*                                                                       */
 350   /* <Fields>                                                              */
 351   /*    version     :: The version number.                                 */
 352   /*                                                                       */
 353   /*    num_records :: The number of hdmx records.                         */
 354   /*                                                                       */
 355   /*    records     :: An array of hdmx records.                           */
 356   /*                                                                       */
 357   typedef struct  TT_HdmxRec_
 358   {
 359     FT_UShort     version;
 360     FT_Short      num_records;
 361     TT_HdmxEntry  records;
 362
 363   } TT_HdmxRec, *TT_Hdmx;
 364
 365
 366   /*************************************************************************/
 367   /*                                                                       */
 368   /* <Struct>                                                              */
 369   /*    TT_Kern0_PairRec                                                   */
 370   /*                                                                       */
 371   /* <Description>                                                         */
 372   /*    A structure used to model a kerning pair for the kerning table     */
 373   /*    format 0.  The engine now loads this table if it finds one in the  */
 374   /*    font file.                                                         */
 375   /*                                                                       */
 376   /* <Fields>                                                              */
 377   /*    left  :: The index of the left glyph in pair.                      */
 378   /*                                                                       */
 379   /*    right :: The index of the right glyph in pair.                     */
 380   /*                                                                       */
 381   /*    value :: The kerning distance.  A positive value spaces the        */
 382   /*             glyphs, a negative one makes them closer.                 */
 383   /*                                                                       */
 384   typedef struct  TT_Kern0_PairRec_
 385   {
 386     FT_UShort  left;   /* index of left  glyph in pair */
 387     FT_UShort  right;  /* index of right glyph in pair */
 388     FT_FWord   value;  /* kerning value                */
 389
 390   } TT_Kern0_PairRec, *TT_Kern0_Pair;
 391
 392 #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */
 393
 394
 395   /*************************************************************************/
 396   /*************************************************************************/
 397   /*************************************************************************/
 398   /***                                                                   ***/
 399   /***                                                                   ***/
 400   /***                    EMBEDDED BITMAPS SUPPORT                       ***/
 401   /***                                                                   ***/
 402   /***                                                                   ***/
 403   /*************************************************************************/
 404   /*************************************************************************/
 405   /*************************************************************************/
 406
 407
 408   /*************************************************************************/
 409   /*                                                                       */
 410   /* <Struct>                                                              */
 411   /*    TT_SBit_MetricsRec                                                 */
 412   /*                                                                       */
 413   /* <Description>                                                         */
 414   /*    A structure used to hold the big metrics of a given glyph bitmap   */
 415   /*    in a TrueType or OpenType font.  These are usually found in the    */
 416   /*    `EBDT' (Microsoft) or `bloc' (Apple) table.                        */
 417   /*                                                                       */
 418   /* <Fields>                                                              */
 419   /*    height       :: The glyph height in pixels.                        */
 420   /*                                                                       */
 421   /*    width        :: The glyph width in pixels.                         */
 422   /*                                                                       */
 423   /*    horiBearingX :: The horizontal left bearing.                       */
 424   /*                                                                       */
 425   /*    horiBearingY :: The horizontal top bearing.                        */
 426   /*                                                                       */
 427   /*    horiAdvance  :: The horizontal advance.                            */
 428   /*                                                                       */
 429   /*    vertBearingX :: The vertical left bearing.                         */
 430   /*                                                                       */
 431   /*    vertBearingY :: The vertical top bearing.                          */
 432   /*                                                                       */
 433   /*    vertAdvance  :: The vertical advance.                              */
 434   /*                                                                       */
 435   typedef struct  TT_SBit_MetricsRec_
 436   {
 437     FT_Byte  height;
 438     FT_Byte  width;
 439
 440     FT_Char  horiBearingX;
 441     FT_Char  horiBearingY;
 442     FT_Byte  horiAdvance;
 443
 444     FT_Char  vertBearingX;
 445     FT_Char  vertBearingY;
 446     FT_Byte  vertAdvance;
 447
 448   } TT_SBit_MetricsRec, *TT_SBit_Metrics;
 449
 450
 451   /*************************************************************************/
 452   /*                                                                       */
 453   /* <Struct>                                                              */
 454   /*    TT_SBit_SmallMetricsRec                                            */
 455   /*                                                                       */
 456   /* <Description>                                                         */
 457   /*    A structure used to hold the small metrics of a given glyph bitmap */
 458   /*    in a TrueType or OpenType font.  These are usually found in the    */
 459   /*    `EBDT' (Microsoft) or the `bdat' (Apple) table.                    */
 460   /*                                                                       */
 461   /* <Fields>                                                              */
 462   /*    height   :: The glyph height in pixels.                            */
 463   /*                                                                       */
 464   /*    width    :: The glyph width in pixels.                             */
 465   /*                                                                       */
 466   /*    bearingX :: The left-side bearing.                                 */
 467   /*                                                                       */
 468   /*    bearingY :: The top-side bearing.                                  */
 469   /*                                                                       */
 470   /*    advance  :: The advance width or height.                           */
 471   /*                                                                       */
 472   typedef struct  TT_SBit_Small_Metrics_
 473   {
 474     FT_Byte  height;
 475     FT_Byte  width;
 476
 477     FT_Char  bearingX;
 478     FT_Char  bearingY;
 479     FT_Byte  advance;
 480
 481   } TT_SBit_SmallMetricsRec, *TT_SBit_SmallMetrics;
 482
 483
 484   /*************************************************************************/
 485   /*                                                                       */
 486   /* <Struct>                                                              */
 487   /*    TT_SBit_LineMetricsRec                                             */
 488   /*                                                                       */
 489   /* <Description>                                                         */
 490   /*    A structure used to describe the text line metrics of a given      */
 491   /*    bitmap strike, for either a horizontal or vertical layout.         */
 492   /*                                                                       */
 493   /* <Fields>                                                              */
 494   /*    ascender                :: The ascender in pixels.                 */
 495   /*                                                                       */
 496   /*    descender               :: The descender in pixels.                */
 497   /*                                                                       */
 498   /*    max_width               :: The maximum glyph width in pixels.      */
 499   /*                                                                       */
 500   /*    caret_slope_enumerator  :: Rise of the caret slope, typically set  */
 501   /*                               to 1 for non-italic fonts.              */
 502   /*                                                                       */
 503   /*    caret_slope_denominator :: Rise of the caret slope, typically set  */
 504   /*                               to 0 for non-italic fonts.              */
 505   /*                                                                       */
 506   /*    caret_offset            :: Offset in pixels to move the caret for  */
 507   /*                               proper positioning.                     */
 508   /*                                                                       */
 509   /*    min_origin_SB           :: Minimum of horiBearingX (resp.          */
 510   /*                               vertBearingY).                          */
 511   /*    min_advance_SB          :: Minimum of                              */
 512   /*                                                                       */
 513   /*                                 horizontal advance -                  */
 514   /*                                   ( horiBearingX + width )            */
 515   /*                                                                       */
 516   /*                               resp.                                   */
 517   /*                                                                       */
 518   /*                                 vertical advance -                    */
 519   /*                                   ( vertBearingY + height )           */
 520   /*                                                                       */
 521   /*    max_before_BL           :: Maximum of horiBearingY (resp.          */
 522   /*                               vertBearingY).                          */
 523   /*                                                                       */
 524   /*    min_after_BL            :: Minimum of                              */
 525   /*                                                                       */
 526   /*                                 horiBearingY - height                 */
 527   /*                                                                       */
 528   /*                               resp.                                   */
 529   /*                                                                       */
 530   /*                                 vertBearingX - width                  */
 531   /*                                                                       */
 532   /*    pads                    :: Unused (to make the size of the record  */
 533   /*                               a multiple of 32 bits.                  */
 534   /*                                                                       */
 535   typedef struct  TT_SBit_LineMetricsRec_
 536   {
 537     FT_Char  ascender;
 538     FT_Char  descender;
 539     FT_Byte  max_width;
 540     FT_Char  caret_slope_numerator;
 541     FT_Char  caret_slope_denominator;
 542     FT_Char  caret_offset;
 543     FT_Char  min_origin_SB;
 544     FT_Char  min_advance_SB;
 545     FT_Char  max_before_BL;
 546     FT_Char  min_after_BL;
 547     FT_Char  pads[2];
 548
 549   } TT_SBit_LineMetricsRec, *TT_SBit_LineMetrics;
 550
 551
 552   /*************************************************************************/
 553   /*                                                                       */
 554   /* <Struct>                                                              */
 555   /*    TT_SBit_RangeRec                                                   */
 556   /*                                                                       */
 557   /* <Description>                                                         */
 558   /*    A TrueType/OpenType subIndexTable as defined in the `EBLC'         */
 559   /*    (Microsoft) or `bloc' (Apple) tables.                              */
 560   /*                                                                       */
 561   /* <Fields>                                                              */
 562   /*    first_glyph   :: The first glyph index in the range.               */
 563   /*                                                                       */
 564   /*    last_glyph    :: The last glyph index in the range.                */
 565   /*                                                                       */
 566   /*    index_format  :: The format of index table.  Valid values are 1    */
 567   /*                     to 5.                                             */
 568   /*                                                                       */
 569   /*    image_format  :: The format of `EBDT' image data.                  */
 570   /*                                                                       */
 571   /*    image_offset  :: The offset to image data in `EBDT'.               */
 572   /*                                                                       */
 573   /*    image_size    :: For index formats 2 and 5.  This is the size in   */
 574   /*                     bytes of each glyph bitmap.                       */
 575   /*                                                                       */
 576   /*    big_metrics   :: For index formats 2 and 5.  This is the big       */
 577   /*                     metrics for each glyph bitmap.                    */
 578   /*                                                                       */
 579   /*    num_glyphs    :: For index formats 4 and 5.  This is the number of */
 580   /*                     glyphs in the code array.                         */
 581   /*                                                                       */
 582   /*    glyph_offsets :: For index formats 1 and 3.                        */
 583   /*                                                                       */
 584   /*    glyph_codes   :: For index formats 4 and 5.                        */
 585   /*                                                                       */
 586   /*    table_offset  :: The offset of the index table in the `EBLC'       */
 587   /*                     table.  Only used during strike loading.          */
 588   /*                                                                       */
 589   typedef struct  TT_SBit_RangeRec_
 590   {
 591     FT_UShort           first_glyph;
 592     FT_UShort           last_glyph;
 593
 594     FT_UShort           index_format;
 595     FT_UShort           image_format;
 596     FT_ULong            image_offset;
 597
 598     FT_ULong            image_size;
 599     TT_SBit_MetricsRec  metrics;
 600     FT_ULong            num_glyphs;
 601
 602     FT_ULong*           glyph_offsets;
 603     FT_UShort*          glyph_codes;
 604
 605     FT_ULong            table_offset;
 606
 607   } TT_SBit_RangeRec, *TT_SBit_Range;
 608
 609
 610   /*************************************************************************/
 611   /*                                                                       */
 612   /* <Struct>                                                              */
 613   /*    TT_SBit_StrikeRec                                                  */
 614   /*                                                                       */
 615   /* <Description>                                                         */
 616   /*    A structure used describe a given bitmap strike in the `EBLC'      */
 617   /*    (Microsoft) or `bloc' (Apple) tables.                              */
 618   /*                                                                       */
 619   /* <Fields>                                                              */
 620   /*   num_index_ranges :: The number of index ranges.                     */
 621   /*                                                                       */
 622   /*   index_ranges     :: An array of glyph index ranges.                 */
 623   /*                                                                       */
 624   /*   color_ref        :: Unused.  `color_ref' is put in for future       */
 625   /*                       enhancements, but these fields are already      */
 626   /*                       in use by other platforms (e.g. Newton).        */
 627   /*                       For details, please see                         */
 628   /*                                                                       */
 629   /*                         http://fonts.apple.com/                       */
 630   /*                                TTRefMan/RM06/Chap6bloc.html           */
 631   /*                                                                       */
 632   /*   hori             :: The line metrics for horizontal layouts.        */
 633   /*                                                                       */
 634   /*   vert             :: The line metrics for vertical layouts.          */
 635   /*                                                                       */
 636   /*   start_glyph      :: The lowest glyph index for this strike.         */
 637   /*                                                                       */
 638   /*   end_glyph        :: The highest glyph index for this strike.        */
 639   /*                                                                       */
 640   /*   x_ppem           :: The number of horizontal pixels per EM.         */
 641   /*                                                                       */
 642   /*   y_ppem           :: The number of vertical pixels per EM.           */
 643   /*                                                                       */
 644   /*   bit_depth        :: The bit depth.  Valid values are 1, 2, 4,       */
 645   /*                       and 8.                                          */
 646   /*                                                                       */
 647   /*   flags            :: Is this a vertical or horizontal strike?  For   */
 648   /*                       details, please see                             */
 649   /*                                                                       */
 650   /*                         http://fonts.apple.com/                       */
 651   /*                                TTRefMan/RM06/Chap6bloc.html           */
 652   /*                                                                       */
 653   typedef struct  TT_SBit_StrikeRec_
 654   {
 655     FT_Int                  num_ranges;
 656     TT_SBit_Range           sbit_ranges;
 657     FT_ULong                ranges_offset;
 658
 659     FT_ULong                color_ref;
 660
 661     TT_SBit_LineMetricsRec  hori;
 662     TT_SBit_LineMetricsRec  vert;
 663
 664     FT_UShort               start_glyph;
 665     FT_UShort               end_glyph;
 666
 667     FT_Byte                 x_ppem;
 668     FT_Byte                 y_ppem;
 669
 670     FT_Byte                 bit_depth;
 671     FT_Char                 flags;
 672
 673   } TT_SBit_StrikeRec, *TT_SBit_Strike;
 674
 675
 676   /*************************************************************************/
 677   /*                                                                       */
 678   /* <Struct>                                                              */
 679   /*    TT_SBit_ComponentRec                                               */
 680   /*                                                                       */
 681   /* <Description>                                                         */
 682   /*    A simple structure to describe a compound sbit element.            */
 683   /*                                                                       */
 684   /* <Fields>                                                              */
 685   /*    glyph_code :: The element's glyph index.                           */
 686   /*                                                                       */
 687   /*    x_offset   :: The element's left bearing.                          */
 688   /*                                                                       */
 689   /*    y_offset   :: The element's top bearing.                           */
 690   /*                                                                       */
 691   typedef struct  TT_SBit_ComponentRec_
 692   {
 693     FT_UShort  glyph_code;
 694     FT_Char    x_offset;
 695     FT_Char    y_offset;
 696
 697   } TT_SBit_ComponentRec, *TT_SBit_Component;
 698
 699
 700   /*************************************************************************/
 701   /*                                                                       */
 702   /* <Struct>                                                              */
 703   /*    TT_SBit_ScaleRec                                                   */
 704   /*                                                                       */
 705   /* <Description>                                                         */
 706   /*    A structure used describe a given bitmap scaling table, as defined */
 707   /*    in the `EBSC' table.                                               */
 708   /*                                                                       */
 709   /* <Fields>                                                              */
 710   /*    hori              :: The horizontal line metrics.                  */
 711   /*                                                                       */
 712   /*    vert              :: The vertical line metrics.                    */
 713   /*                                                                       */
 714   /*    x_ppem            :: The number of horizontal pixels per EM.       */
 715   /*                                                                       */
 716   /*    y_ppem            :: The number of vertical pixels per EM.         */
 717   /*                                                                       */
 718   /*    x_ppem_substitute :: Substitution x_ppem value.                    */
 719   /*                                                                       */
 720   /*    y_ppem_substitute :: Substitution y_ppem value.                    */
 721   /*                                                                       */
 722   typedef struct  TT_SBit_ScaleRec_
 723   {
 724     TT_SBit_LineMetricsRec  hori;
 725     TT_SBit_LineMetricsRec  vert;
 726
 727     FT_Byte                 x_ppem;
 728     FT_Byte                 y_ppem;
 729
 730     FT_Byte                 x_ppem_substitute;
 731     FT_Byte                 y_ppem_substitute;
 732
 733   } TT_SBit_ScaleRec, *TT_SBit_Scale;
 734
 735
 736   /*************************************************************************/
 737   /*************************************************************************/
 738   /*************************************************************************/
 739   /***                                                                   ***/
 740   /***                                                                   ***/
 741   /***                  POSTSCRIPT GLYPH NAMES SUPPORT                   ***/
 742   /***                                                                   ***/
 743   /***                                                                   ***/
 744   /*************************************************************************/
 745   /*************************************************************************/
 746   /*************************************************************************/
 747
 748
 749   /*************************************************************************/
 750   /*                                                                       */
 751   /* <Struct>                                                              */
 752   /*    TT_Post_20Rec                                                      */
 753   /*                                                                       */
 754   /* <Description>                                                         */
 755   /*    Postscript names sub-table, format 2.0.  Stores the PS name of     */
 756   /*    each glyph in the font face.                                       */
 757   /*                                                                       */
 758   /* <Fields>                                                              */
 759   /*    num_glyphs    :: The number of named glyphs in the table.          */
 760   /*                                                                       */
 761   /*    num_names     :: The number of PS names stored in the table.       */
 762   /*                                                                       */
 763   /*    glyph_indices :: The indices of the glyphs in the names arrays.    */
 764   /*                                                                       */
 765   /*    glyph_names   :: The PS names not in Mac Encoding.                 */
 766   /*                                                                       */
 767   typedef struct  TT_Post_20Rec_
 768   {
 769     FT_UShort   num_glyphs;
 770     FT_UShort   num_names;
 771     FT_UShort*  glyph_indices;
 772     FT_Char**   glyph_names;
 773
 774   } TT_Post_20Rec, *TT_Post_20;
 775
 776
 777   /*************************************************************************/
 778   /*                                                                       */
 779   /* <Struct>                                                              */
 780   /*    TT_Post_25Rec                                                      */
 781   /*                                                                       */
 782   /* <Description>                                                         */
 783   /*    Postscript names sub-table, format 2.5.  Stores the PS name of     */
 784   /*    each glyph in the font face.                                       */
 785   /*                                                                       */
 786   /* <Fields>                                                              */
 787   /*    num_glyphs :: The number of glyphs in the table.                   */
 788   /*                                                                       */
 789   /*    offsets    :: An array of signed offsets in a normal Mac           */
 790   /*                  Postscript name encoding.                            */
 791   /*                                                                       */
 792   typedef struct  TT_Post_25_
 793   {
 794     FT_UShort  num_glyphs;
 795     FT_Char*   offsets;
 796
 797   } TT_Post_25Rec, *TT_Post_25;
 798
 799
 800   /*************************************************************************/
 801   /*                                                                       */
 802   /* <Struct>                                                              */
 803   /*    TT_Post_NamesRec                                                   */
 804   /*                                                                       */
 805   /* <Description>                                                         */
 806   /*    Postscript names table, either format 2.0 or 2.5.                  */
 807   /*                                                                       */
 808   /* <Fields>                                                              */
 809   /*    loaded    :: A flag to indicate whether the PS names are loaded.   */
 810   /*                                                                       */
 811   /*    format_20 :: The sub-table used for format 2.0.                    */
 812   /*                                                                       */
 813   /*    format_25 :: The sub-table used for format 2.5.                    */
 814   /*                                                                       */
 815   typedef struct  TT_Post_NamesRec_
 816   {
 817     FT_Bool  loaded;
 818
 819     union
 820     {
 821       TT_Post_20Rec  format_20;
 822       TT_Post_25Rec  format_25;
 823
 824     } names;
 825
 826   } TT_Post_NamesRec, *TT_Post_Names;
 827
 828
 829   /*************************************************************************/
 830   /*************************************************************************/
 831   /*************************************************************************/
 832   /***                                                                   ***/
 833   /***                                                                   ***/
 834   /***                    GX VARIATION TABLE SUPPORT                     ***/
 835   /***                                                                   ***/
 836   /***                                                                   ***/
 837   /*************************************************************************/
 838   /*************************************************************************/
 839   /*************************************************************************/
 840
 841
 842 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
 843   typedef struct GX_BlendRec_  *GX_Blend;
 844 #endif
 845
 846   /*************************************************************************/
 847   /*************************************************************************/
 848   /*************************************************************************/
 849   /***                                                                   ***/
 850   /***                                                                   ***/
 851   /***              EMBEDDED BDF PROPERTIES TABLE SUPPORT                ***/
 852   /***                                                                   ***/
 853   /***                                                                   ***/
 854   /*************************************************************************/
 855   /*************************************************************************/
 856   /*************************************************************************/
 857
 858   /*
 859    * These types are used to support a `BDF ' table that isn't part of the
 860    * official TrueType specification.  It is mainly used in SFNT-based
 861    * bitmap fonts that were generated from a set of BDF fonts.
 862    *
 863    * The format of the table is as follows.
 864    *
 865    *   USHORT   version      `BDF ' table version number, should be 0x0001.
 866    *   USHORT   strikeCount  Number of strikes (bitmap sizes) in this table.
 867    *   ULONG    stringTable  Offset (from start of BDF table) to string
 868    *                         table.
 869    *
 870    * This is followed by an array of `strikeCount' descriptors, having the
 871    * following format.
 872    *
 873    *   USHORT   ppem         Vertical pixels per EM for this strike.
 874    *   USHORT   numItems     Number of items for this strike (properties and
 875    *                         atoms).  Maximum is 255.
 876    *
 877    * This array in turn is followed by `strikeCount' value sets.  Each
 878    * `value set' is an array of `numItems' items with the following format.
 879    *
 880    *   ULONG    item_name    Offset in string table to item name.
 881    *   USHORT   item_type    The item type.  Possible values are
 882    *                            0 => string (e.g., COMMENT)
 883    *                            1 => atom   (e.g., FONT or even SIZE)
 884    *                            2 => int32
 885    *                            3 => uint32
 886    *                         0x10 => A flag to indicate a properties.  This
 887    *                                 is ORed with the above values.
 888    *   ULONG    item_value   For strings  => Offset into string table without
 889    *                                         the corresponding double quotes.
 890    *                         For atoms    => Offset into string table.
 891    *                         For integers => Direct value.
 892    *
 893    * All strings in the string table consist of bytes and are
 894    * zero-terminated.
 895    *
 896    */
 897
 898 #ifdef TT_CONFIG_OPTION_BDF
 899
 900   typedef struct  TT_BDFRec_
 901   {
 902     FT_Byte*   table;
 903     FT_Byte*   table_end;
 904     FT_Byte*   strings;
 905     FT_ULong   strings_size;
 906     FT_UInt    num_strikes;
 907     FT_Bool    loaded;
 908
 909   } TT_BDFRec, *TT_BDF;
 910
 911 #endif /* TT_CONFIG_OPTION_BDF */
 912
 913   /*************************************************************************/
 914   /*************************************************************************/
 915   /*************************************************************************/
 916   /***                                                                   ***/
 917   /***                                                                   ***/
 918   /***                  ORIGINAL TT_FACE CLASS DEFINITION                ***/
 919   /***                                                                   ***/
 920   /***                                                                   ***/
 921   /*************************************************************************/
 922   /*************************************************************************/
 923   /*************************************************************************/
 924
 925
 926   /*************************************************************************/
 927   /*                                                                       */
 928   /* This structure/class is defined here because it is common to the      */
 929   /* following formats: TTF, OpenType-TT, and OpenType-CFF.                */
 930   /*                                                                       */
 931   /* Note, however, that the classes TT_Size and TT_GlyphSlot are not      */
 932   /* shared between font drivers, and are thus defined in `ttobjs.h'.      */
 933   /*                                                                       */
 934   /*************************************************************************/
 935
 936
 937   /*************************************************************************/
 938   /*                                                                       */
 939   /* <Type>                                                                */
 940   /*    TT_Face                                                            */
 941   /*                                                                       */
 942   /* <Description>                                                         */
 943   /*    A handle to a TrueType face/font object.  A TT_Face encapsulates   */
 944   /*    the resolution and scaling independent parts of a TrueType font    */
 945   /*    resource.                                                          */
 946   /*                                                                       */
 947   /* <Note>                                                                */
 948   /*    The TT_Face structure is also used as a `parent class' for the     */
 949   /*    OpenType-CFF class (T2_Face).                                      */
 950   /*                                                                       */
 951   typedef struct TT_FaceRec_*  TT_Face;
 952
 953
 954   /* a function type used for the truetype bytecode interpreter hooks */
 955   typedef FT_Error
 956   (*TT_Interpreter)( void*  exec_context );
 957
 958   /* forward declaration */
 959   typedef struct TT_LoaderRec_*  TT_Loader;
 960
 961
 962   /*************************************************************************/
 963   /*                                                                       */
 964   /* <FuncType>                                                            */
 965   /*    TT_Loader_GotoTableFunc                                            */
 966   /*                                                                       */
 967   /* <Description>                                                         */
 968   /*    Seeks a stream to the start of a given TrueType table.             */
 969   /*                                                                       */
 970   /* <Input>                                                               */
 971   /*    face   :: A handle to the target face object.                      */
 972   /*                                                                       */
 973   /*    tag    :: A 4-byte tag used to name the table.                     */
 974   /*                                                                       */
 975   /*    stream :: The input stream.                                        */
 976   /*                                                                       */
 977   /* <Output>                                                              */
 978   /*    length :: The length of the table in bytes.  Set to 0 if not       */
 979   /*              needed.                                                  */
 980   /*                                                                       */
 981   /* <Return>                                                              */
 982   /*    FreeType error code.  0 means success.                             */
 983   /*                                                                       */
 984   /* <Note>                                                                */
 985   /*    The stream cursor must be at the font file's origin.               */
 986   /*                                                                       */
 987   typedef FT_Error
 988   (*TT_Loader_GotoTableFunc)( TT_Face    face,
 989                               FT_ULong   tag,
 990                               FT_Stream  stream,
 991                               FT_ULong*  length );
 992
 993
 994   /*************************************************************************/
 995   /*                                                                       */
 996   /* <FuncType>                                                            */
 997   /*    TT_Loader_StartGlyphFunc                                           */
 998   /*                                                                       */
 999   /* <Description>                                                         */
1000   /*    Seeks a stream to the start of a given glyph element, and opens a  */
1001   /*    frame for it.                                                      */
1002   /*                                                                       */
1003   /* <Input>                                                               */
1004   /*    loader      :: The current TrueType glyph loader object.           */
1005   /*                                                                       */
1006   /*    glyph index :: The index of the glyph to access.                   */
1007   /*                                                                       */
1008   /*    offset      :: The offset of the glyph according to the            */
1009   /*                   `locations' table.                                  */
1010   /*                                                                       */
1011   /*    byte_count  :: The size of the frame in bytes.                     */
1012   /*                                                                       */
1013   /* <Return>                                                              */
1014   /*    FreeType error code.  0 means success.                             */
1015   /*                                                                       */
1016   /* <Note>                                                                */
1017   /*    This function is normally equivalent to FT_STREAM_SEEK(offset)     */
1018   /*    followed by FT_FRAME_ENTER(byte_count) with the loader's stream,   */
1019   /*    but alternative formats (e.g. compressed ones) might use something */
1020   /*    different.                                                         */
1021   /*                                                                       */
1022   typedef FT_Error
1023   (*TT_Loader_StartGlyphFunc)( TT_Loader  loader,
1024                                FT_UInt    glyph_index,
1025                                FT_ULong   offset,
1026                                FT_UInt    byte_count );
1027
1028
1029   /*************************************************************************/
1030   /*                                                                       */
1031   /* <FuncType>                                                            */
1032   /*    TT_Loader_ReadGlyphFunc                                            */
1033   /*                                                                       */
1034   /* <Description>                                                         */
1035   /*    Reads one glyph element (its header, a simple glyph, or a          */
1036   /*    composite) from the loader's current stream frame.                 */
1037   /*                                                                       */
1038   /* <Input>                                                               */
1039   /*    loader :: The current TrueType glyph loader object.                */
1040   /*                                                                       */
1041   /* <Return>                                                              */
1042   /*    FreeType error code.  0 means success.                             */
1043   /*                                                                       */
1044   typedef FT_Error
1045   (*TT_Loader_ReadGlyphFunc)( TT_Loader  loader );
1046
1047
1048   /*************************************************************************/
1049   /*                                                                       */
1050   /* <FuncType>                                                            */
1051   /*    TT_Loader_EndGlyphFunc                                             */
1052   /*                                                                       */
1053   /* <Description>                                                         */
1054   /*    Closes the current loader stream frame for the glyph.              */
1055   /*                                                                       */
1056   /* <Input>                                                               */
1057   /*    loader :: The current TrueType glyph loader object.                */
1058   /*                                                                       */
1059   typedef void
1060   (*TT_Loader_EndGlyphFunc)( TT_Loader  loader );
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 `verticalInfo' 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_strikes     :: The number of sbit strikes, i.e., bitmap   */
1175   /*                            sizes, embedded in this font.              */
1176   /*                                                                       */
1177   /*    sbit_strikes         :: An array of sbit strikes embedded in this  */
1178   /*                            font.  This table is optional in a         */
1179   /*                            TrueType/OpenType font.                    */
1180   /*                                                                       */
1181   /*    num_sbit_scales      :: The number of sbit scales for this font.   */
1182   /*                                                                       */
1183   /*    sbit_scales          :: Array of sbit scales embedded in this      */
1184   /*                            font.  This table is optional in a         */
1185   /*                            TrueType/OpenType font.                    */
1186   /*                                                                       */
1187   /*    postscript_names     :: A table used to store the Postscript names */
1188   /*                            of  the glyphs for this font.  See the     */
1189   /*                            file  `ttconfig.h' for comments on the     */
1190   /*                            TT_CONFIG_OPTION_POSTSCRIPT_NAMES option.  */
1191   /*                                                                       */
1192   /*    num_locations        :: The number of glyph locations in this      */
1193   /*                            TrueType file.  This should be             */
1194   /*                            identical to the number of glyphs.         */
1195   /*                            Ignored for Type 2 fonts.                  */
1196   /*                                                                       */
1197   /*    glyph_locations      :: An array of longs.  These are offsets to   */
1198   /*                            glyph data within the `glyf' table.        */
1199   /*                            Ignored for Type 2 font faces.             */
1200   /*                                                                       */
1201   /*    glyf_len             :: The length of the `glyf' table.  Needed    */
1202   /*                            for malformed `loca' tables.               */
1203   /*                                                                       */
1204   /*    font_program_size    :: Size in bytecodes of the face's font       */
1205   /*                            program.  0 if none defined.  Ignored for  */
1206   /*                            Type 2 fonts.                              */
1207   /*                                                                       */
1208   /*    font_program         :: The face's font program (bytecode stream)  */
1209   /*                            executed at load time, also used during    */
1210   /*                            glyph rendering.  Comes from the `fpgm'    */
1211   /*                            table.  Ignored for Type 2 font fonts.     */
1212   /*                                                                       */
1213   /*    cvt_program_size     :: The size in bytecodes of the face's cvt    */
1214   /*                            program.  Ignored for Type 2 fonts.        */
1215   /*                                                                       */
1216   /*    cvt_program          :: The face's cvt program (bytecode stream)   */
1217   /*                            executed each time an instance/size is     */
1218   /*                            changed/reset.  Comes from the `prep'      */
1219   /*                            table.  Ignored for Type 2 fonts.          */
1220   /*                                                                       */
1221   /*    cvt_size             :: Size of the control value table (in        */
1222   /*                            entries).   Ignored for Type 2 fonts.      */
1223   /*                                                                       */
1224   /*    cvt                  :: The face's original control value table.   */
1225   /*                            Coordinates are expressed in unscaled font */
1226   /*                            units.  Comes from the `cvt ' table.       */
1227   /*                            Ignored for Type 2 fonts.                  */
1228   /*                                                                       */
1229   /*    num_kern_pairs       :: The number of kerning pairs present in the */
1230   /*                            font file.  The engine only loads the      */
1231   /*                            first horizontal format 0 kern table it    */
1232   /*                            finds in the font file.  Ignored for       */
1233   /*                            Type 2 fonts.                              */
1234   /*                                                                       */
1235   /*    kern_table_index     :: The index of the kerning table in the font */
1236   /*                            kerning directory.  Ignored for Type 2     */
1237   /*                            fonts.                                     */
1238   /*                                                                       */
1239   /*    interpreter          :: A pointer to the TrueType bytecode         */
1240   /*                            interpreters field is also used to hook    */
1241   /*                            the debugger in `ttdebug'.                 */
1242   /*                                                                       */
1243   /*    unpatented_hinting   :: If true, use only unpatented methods in    */
1244   /*                            the bytecode interpreter.                  */
1245   /*                                                                       */
1246   /*    doblend              :: A boolean which is set if the font should  */
1247   /*                            be blended (this is for GX var).           */
1248   /*                                                                       */
1249   /*    blend                :: Contains the data needed to control GX     */
1250   /*                            variation tables (rather like Multiple     */
1251   /*                            Master data).                              */
1252   /*                                                                       */
1253   /*    extra                :: Reserved for third-party font drivers.     */
1254   /*                                                                       */
1255   /*    postscript_name      :: The PS name of the font.  Used by the      */
1256   /*                            postscript name service.                   */
1257   /*                                                                       */
1258   typedef struct  TT_FaceRec_
1259   {
1260     FT_FaceRec            root;
1261
1262     TTC_HeaderRec         ttc_header;
1263
1264     FT_ULong              format_tag;
1265     FT_UShort             num_tables;
1266     TT_Table              dir_tables;
1267
1268     TT_Header             header;       /* TrueType header table          */
1269     TT_HoriHeader         horizontal;   /* TrueType horizontal header     */
1270
1271     TT_MaxProfile         max_profile;
1272 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
1273     FT_ULong              max_components;  /* stubbed to 0 */
1274 #endif
1275
1276     FT_Bool               vertical_info;
1277     TT_VertHeader         vertical;     /* TT Vertical header, if present */
1278
1279     FT_UShort             num_names;    /* number of name records  */
1280     TT_NameTableRec       name_table;   /* name table              */
1281
1282     TT_OS2                os2;          /* TrueType OS/2 table            */
1283     TT_Postscript         postscript;   /* TrueType Postscript table      */
1284
1285     FT_Byte*              cmap_table;   /* extracted `cmap' table */
1286     FT_ULong              cmap_size;
1287
1288     TT_Loader_GotoTableFunc   goto_table;
1289
1290     TT_Loader_StartGlyphFunc  access_glyph_frame;
1291     TT_Loader_EndGlyphFunc    forget_glyph_frame;
1292     TT_Loader_ReadGlyphFunc   read_glyph_header;
1293     TT_Loader_ReadGlyphFunc   read_simple_glyph;
1294     TT_Loader_ReadGlyphFunc   read_composite_glyph;
1295
1296     /* a typeless pointer to the SFNT_Interface table used to load */
1297     /* the basic TrueType tables in the face object                */
1298     void*                 sfnt;
1299
1300     /* a typeless pointer to the FT_Service_PsCMapsRec table used to */
1301     /* handle glyph names <-> unicode & Mac values                   */
1302     void*                 psnames;
1303
1304
1305     /***********************************************************************/
1306     /*                                                                     */
1307     /* Optional TrueType/OpenType tables                                   */
1308     /*                                                                     */
1309     /***********************************************************************/
1310
1311     /* horizontal device metrics */
1312 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
1313     TT_HdmxRec            hdmx;
1314 #endif
1315
1316     /* grid-fitting and scaling table */
1317     TT_GaspRec            gasp;                 /* the `gasp' table */
1318
1319     /* PCL 5 table */
1320     TT_PCLT               pclt;
1321
1322     /* embedded bitmaps support */
1323 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
1324     FT_ULong              num_sbit_strikes;
1325     TT_SBit_Strike        sbit_strikes;
1326 #endif
1327
1328     FT_ULong              num_sbit_scales;
1329     TT_SBit_Scale         sbit_scales;
1330
1331     /* postscript names table */
1332     TT_Post_NamesRec      postscript_names;
1333
1334
1335     /***********************************************************************/
1336     /*                                                                     */
1337     /* TrueType-specific fields (ignored by the OTF-Type2 driver)          */
1338     /*                                                                     */
1339     /***********************************************************************/
1340
1341     /* the glyph locations */
1342 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
1343     FT_UShort             num_locations_stub;
1344     FT_Long*              glyph_locations_stub;
1345 #endif
1346
1347     /* the font program, if any */
1348     FT_ULong              font_program_size;
1349     FT_Byte*              font_program;
1350
1351     /* the cvt program, if any */
1352     FT_ULong              cvt_program_size;
1353     FT_Byte*              cvt_program;
1354
1355     /* the original, unscaled, control value table */
1356     FT_ULong              cvt_size;
1357     FT_Short*             cvt;
1358
1359 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
1360     /* the format 0 kerning table, if any */
1361     FT_Int                num_kern_pairs;
1362     FT_Int                kern_table_index;
1363     TT_Kern0_Pair         kern_pairs;
1364 #endif
1365
1366     /* A pointer to the bytecode interpreter to use.  This is also */
1367     /* used to hook the debugger for the `ttdebug' utility.        */
1368     TT_Interpreter        interpreter;
1369
1370 #ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
1371     /* Use unpatented hinting only. */
1372     FT_Bool               unpatented_hinting;
1373 #endif
1374
1375     /***********************************************************************/
1376     /*                                                                     */
1377     /* Other tables or fields. This is used by derivative formats like     */
1378     /* OpenType.                                                           */
1379     /*                                                                     */
1380     /***********************************************************************/
1381
1382     FT_Generic            extra;
1383
1384     const char*           postscript_name;
1385
1386     /* since version 2.1.8, but was originally placed after */
1387     /* `glyph_locations_stub'                               */
1388     FT_ULong              glyf_len;
1389
1390     /* since version 2.1.8, but was originally placed before `extra' */
1391 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
1392     FT_Bool               doblend;
1393     GX_Blend              blend;
1394 #endif
1395
1396     /* since version 2.2 */
1397
1398     FT_Byte*              horz_metrics;
1399     FT_ULong              horz_metrics_size;
1400
1401     FT_Byte*              vert_metrics;
1402     FT_ULong              vert_metrics_size;
1403
1404     FT_ULong              num_locations; /* in broken TTF, gid > 0xFFFF */
1405     FT_Byte*              glyph_locations;
1406
1407     FT_Byte*              hdmx_table;
1408     FT_ULong              hdmx_table_size;
1409     FT_UInt               hdmx_record_count;
1410     FT_ULong              hdmx_record_size;
1411     FT_Byte*              hdmx_record_sizes;
1412
1413     FT_Byte*              sbit_table;
1414     FT_ULong              sbit_table_size;
1415     FT_UInt               sbit_num_strikes;
1416
1417     FT_Byte*              kern_table;
1418     FT_ULong              kern_table_size;
1419     FT_UInt               num_kern_tables;
1420     FT_UInt32             kern_avail_bits;
1421     FT_UInt32             kern_order_bits;
1422
1423 #ifdef TT_CONFIG_OPTION_BDF
1424     TT_BDFRec             bdf;
1425 #endif /* TT_CONFIG_OPTION_BDF */
1426
1427     /* since 2.3.0 */
1428     FT_ULong              horz_metrics_offset;
1429     FT_ULong              vert_metrics_offset;
1430
1431   } TT_FaceRec;
1432
1433
1434   /*************************************************************************/
1435   /*                                                                       */
1436   /*  <Struct>                                                             */
1437   /*     TT_GlyphZoneRec                                                   */
1438   /*                                                                       */
1439   /*  <Description>                                                        */
1440   /*     A glyph zone is used to load, scale and hint glyph outline        */
1441   /*     coordinates.                                                      */
1442   /*                                                                       */
1443   /*  <Fields>                                                             */
1444   /*     memory       :: A handle to the memory manager.                   */
1445   /*                                                                       */
1446   /*     max_points   :: The maximum size in points of the zone.           */
1447   /*                                                                       */
1448   /*     max_contours :: Max size in links contours of the zone.           */
1449   /*                                                                       */
1450   /*     n_points     :: The current number of points in the zone.         */
1451   /*                                                                       */
1452   /*     n_contours   :: The current number of contours in the zone.       */
1453   /*                                                                       */
1454   /*     org          :: The original glyph coordinates (font              */
1455   /*                     units/scaled).                                    */
1456   /*                                                                       */
1457   /*     cur          :: The current glyph coordinates (scaled/hinted).    */
1458   /*                                                                       */
1459   /*     tags         :: The point control tags.                           */
1460   /*                                                                       */
1461   /*     contours     :: The contours end points.                          */
1462   /*                                                                       */
1463   /*     first_point  :: Offset of the current subglyph's first point.     */
1464   /*                                                                       */
1465   typedef struct  TT_GlyphZoneRec_
1466   {
1467     FT_Memory   memory;
1468     FT_UShort   max_points;
1469     FT_UShort   max_contours;
1470     FT_UShort   n_points;    /* number of points in zone    */
1471     FT_Short    n_contours;  /* number of contours          */
1472
1473     FT_Vector*  org;         /* original point coordinates  */
1474     FT_Vector*  cur;         /* current point coordinates   */
1475     FT_Vector*  orus;        /* original (unscaled) point coordinates */
1476
1477     FT_Byte*    tags;        /* current touch flags         */
1478     FT_UShort*  contours;    /* contour end points          */
1479
1480     FT_UShort   first_point; /* offset of first (#0) point  */
1481
1482   } TT_GlyphZoneRec, *TT_GlyphZone;
1483
1484
1485   /* handle to execution context */
1486   typedef struct TT_ExecContextRec_*  TT_ExecContext;
1487
1488   /* glyph loader structure */
1489   typedef struct  TT_LoaderRec_
1490   {
1491     FT_Face          face;
1492     FT_Size          size;
1493     FT_GlyphSlot     glyph;
1494     FT_GlyphLoader   gloader;
1495
1496     FT_ULong         load_flags;
1497     FT_UInt          glyph_index;
1498
1499     FT_Stream        stream;
1500     FT_Int           byte_len;
1501
1502     FT_Short         n_contours;
1503     FT_BBox          bbox;
1504     FT_Int           left_bearing;
1505     FT_Int           advance;
1506     FT_Int           linear;
1507     FT_Bool          linear_def;
1508     FT_Bool          preserve_pps;
1509     FT_Vector        pp1;
1510     FT_Vector        pp2;
1511
1512     FT_ULong         glyf_offset;
1513
1514     /* the zone where we load our glyphs */
1515     TT_GlyphZoneRec  base;
1516     TT_GlyphZoneRec  zone;
1517
1518     TT_ExecContext   exec;
1519     FT_Byte*         instructions;
1520     FT_ULong         ins_pos;
1521
1522     /* for possible extensibility in other formats */
1523     void*            other;
1524
1525     /* since version 2.1.8 */
1526     FT_Int           top_bearing;
1527     FT_Int           vadvance;
1528     FT_Vector        pp3;
1529     FT_Vector        pp4;
1530
1531     /* since version 2.2.1 */
1532     FT_Byte*         cursor;
1533     FT_Byte*         limit;
1534
1535   } TT_LoaderRec;
1536
1537
1538 FT_END_HEADER
1539
1540 #endif /* __TTTYPES_H__ */
1541
1542
1543 /* END */