tttypes.h

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

  /* <Description>                                                         */
  /*    A structure modeling the TrueType name table.                      */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    format         :: The format of the name table.                    */
  /*                                                                       */
  /*    numNameRecords :: The number of names in table.                    */
  /*                                                                       */
  /*    storageOffset  :: The offset of the name table in the `name'       */
  /*                      TrueType table.                                  */
  /*                                                                       */
  /*    names          :: An array of name records.                        */
  /*                                                                       */
  /*    stream         :: the file's input stream.                         */
  /*                                                                       */
  typedef struct  TT_NameTableRec_
  {
    FT_UShort         format;
    FT_UInt           numNameRecords;
    FT_UInt           storageOffset;
    TT_NameEntryRec*  names;
    FT_Stream         stream;

  } TT_NameTableRec, *TT_NameTable;


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /***                                                                   ***/
  /***                                                                   ***/
  /***             OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS         ***/
  /***                                                                   ***/
  /***                                                                   ***/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_GaspRangeRec                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A tiny structure used to model a gasp range according to the       */
  /*    TrueType specification.                                            */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    maxPPEM  :: The maximum ppem value to which `gaspFlag' applies.    */
  /*                                                                       */
  /*    gaspFlag :: A flag describing the grid-fitting and anti-aliasing   */
  /*                modes to be used.                                      */
  /*                                                                       */
  typedef struct  TT_GaspRangeRec_
  {
    FT_UShort  maxPPEM;
    FT_UShort  gaspFlag;

  } TT_GaspRangeRec, *TT_GaspRange;


#define TT_GASP_GRIDFIT  0x01
#define TT_GASP_DOGRAY   0x02


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_GaspRec                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure modeling the TrueType `gasp' table used to specify     */
  /*    grid-fitting and anti-aliasing behaviour.                          */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    version    :: The version number.                                  */
  /*                                                                       */
  /*    numRanges  :: The number of gasp ranges in table.                  */
  /*                                                                       */
  /*    gaspRanges :: An array of gasp ranges.                             */
  /*                                                                       */
  typedef struct  TT_Gasp_
  {
    FT_UShort     version;
    FT_UShort     numRanges;
    TT_GaspRange  gaspRanges;

  } TT_GaspRec;


#ifdef FT_CONFIG_OPTION_OLD_INTERNALS

  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_HdmxEntryRec                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A small structure used to model the pre-computed widths of a given */
  /*    size.  They are found in the `hdmx' table.                         */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    ppem      :: The pixels per EM value at which these metrics apply. */
  /*                                                                       */
  /*    max_width :: The maximum advance width for this metric.            */
  /*                                                                       */
  /*    widths    :: An array of widths.  Note: These are 8-bit bytes.     */
  /*                                                                       */
  typedef struct  TT_HdmxEntryRec_
  {
    FT_Byte   ppem;
    FT_Byte   max_width;
    FT_Byte*  widths;

  } TT_HdmxEntryRec, *TT_HdmxEntry;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_HdmxRec                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to model the `hdmx' table, which contains         */
  /*    pre-computed widths for a set of given sizes/dimensions.           */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    version     :: The version number.                                 */
  /*                                                                       */
  /*    num_records :: The number of hdmx records.                         */
  /*                                                                       */
  /*    records     :: An array of hdmx records.                           */
  /*                                                                       */
  typedef struct  TT_HdmxRec_
  {
    FT_UShort     version;
    FT_Short      num_records;
    TT_HdmxEntry  records;

  } TT_HdmxRec, *TT_Hdmx;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_Kern0_PairRec                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to model a kerning pair for the kerning table     */
  /*    format 0.  The engine now loads this table if it finds one in the  */
  /*    font file.                                                         */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    left  :: The index of the left glyph in pair.                      */
  /*                                                                       */
  /*    right :: The index of the right glyph in pair.                     */
  /*                                                                       */
  /*    value :: The kerning distance.  A positive value spaces the        */
  /*             glyphs, a negative one makes them closer.                 */
  /*                                                                       */
  typedef struct  TT_Kern0_PairRec_
  {
    FT_UShort  left;   /* index of left  glyph in pair */
    FT_UShort  right;  /* index of right glyph in pair */
    FT_FWord   value;  /* kerning value                */

  } TT_Kern0_PairRec, *TT_Kern0_Pair;

#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /***                                                                   ***/
  /***                                                                   ***/
  /***                    EMBEDDED BITMAPS SUPPORT                       ***/
  /***                                                                   ***/
  /***                                                                   ***/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_SBit_MetricsRec                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to hold the big metrics of a given glyph bitmap   */
  /*    in a TrueType or OpenType font.  These are usually found in the    */
  /*    `EBDT' (Microsoft) or `bloc' (Apple) table.                        */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    height       :: The glyph height in pixels.                        */
  /*                                                                       */
  /*    width        :: The glyph width in pixels.                         */
  /*                                                                       */
  /*    horiBearingX :: The horizontal left bearing.                       */
  /*                                                                       */
  /*    horiBearingY :: The horizontal top bearing.                        */
  /*                                                                       */
  /*    horiAdvance  :: The horizontal advance.                            */
  /*                                                                       */
  /*    vertBearingX :: The vertical left bearing.                         */
  /*                                                                       */
  /*    vertBearingY :: The vertical top bearing.                          */
  /*                                                                       */
  /*    vertAdvance  :: The vertical advance.                              */
  /*                                                                       */
  typedef struct  TT_SBit_MetricsRec_
  {
    FT_Byte  height;
    FT_Byte  width;

    FT_Char  horiBearingX;
    FT_Char  horiBearingY;
    FT_Byte  horiAdvance;

    FT_Char  vertBearingX;