tttypes.h

Qt/Embedded是一个多平台的C++图形用户界面应用程序框架

  REDEFINE( Fixed );


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    TT_Pos                                                             */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The type FT_Pos is a 32-bit integer used to store vectorial        */
  /*    coordinates.  Depending on the context, these can represent        */
  /*    distances in integer font units, or 26.6 fixed float pixel         */
  /*    coordinates.                                                       */
  /*                                                                       */
  REDEFINE( Pos );


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_Vector                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple structure used to store a 2d vector; coordinates are of   */
  /*    the TT_Pos type.                                                   */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    x :: The horizontal coordinate.                                    */
  /*    y :: The vertical coordinate.                                      */
  /*                                                                       */
  REDEFINE( Vector );


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_UnitVector                                                      */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple structure used to store a 2d vector unit vector.  Uses    */
  /*    TT_F2Dot14 types.                                                  */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    x :: Horizontal coordinate.                                        */
  /*    y :: Vertical coordinate.                                          */
  /*                                                                       */
  REDEFINE( UnitVector );


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_Matrix                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple structure used to store a 2x2 matrix.  Coefficients are   */
  /*    in 16.16 fixed float format.  The computation performed is:        */
  /*                                                                       */
  /*       {                                                               */
  /*          x' = x*xx + y*xy                                             */
  /*          y' = x*yx + y*yy                                             */
  /*       }                                                               */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    xx :: Matrix coefficient.                                          */
  /*    xy :: Matrix coefficient.                                          */
  /*    yx :: Matrix coefficient.                                          */
  /*    yy :: Matrix coefficient.                                          */
  /*                                                                       */
  REDEFINE( Matrix );


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_BBox                                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to hold an outline's bounding box, i.e., the      */
  /*    coordinates of its extrema in the horizontal and vertical          */
  /*    directions.                                                        */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    xMin :: The horizontal minimum (left-most).                        */
  /*    yMin :: The vertical minimum (bottom-most).                        */
  /*    xMax :: The horizontal maximum (right-most).                       */
  /*    yMax :: The vertical maximum (top-most).                           */
  /*                                                                       */
  REDEFINE( BBox );


  /*************************************************************************/
  /*                                                                       */
  /* <Type>                                                                */
  /*    TT_Error                                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The TrueType error code type.  A value of 0 is always interpreted  */
  /*    as a successful operation.                                         */
  /*                                                                       */
  REDEFINE( Error );


  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/
  /***                                                                   ***/
  /***                                                                   ***/
  /***             REQUIRED TRUETYPE/OPENTYPE TABLES DEFINITIONS         ***/
  /***                                                                   ***/
  /***                                                                   ***/
  /*************************************************************************/
  /*************************************************************************/
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TTC_Header                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    TrueType collection header.  This table contains the offsets of    */
  /*    the font headers of each distinct TrueType face in the file.       */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    tag     :: Must be `ttc ' to indicate a TrueType collection.       */
  /*    version :: The version number.                                     */
  /*    count   :: The number of faces in the collection.  The             */
  /*               specification says this should be an unsigned long, but */
  /*               we use a signed long since we need the value -1 for     */
  /*               specific purposes.                                      */
  /*    offsets :: The offsets of the font headers, one per face.          */
  /*                                                                       */
  typedef struct  TTC_Header_
  {
    TT_ULong   Tag;
    TT_Fixed   version;
    TT_Long    DirCount;
    TT_ULong*  TableDirectory;

  } TTC_Header;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_TableDir                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure models a TrueType table directory.  It is used to   */
  /*    access the various tables of the font face.                        */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    version       :: The version number; starts with 0x00010000.       */
  /*    numTables     :: The number of tables.                             */
  /*                                                                       */
  /*    searchRange   :: Unused.                                           */
  /*    entrySelector :: Unused.                                           */
  /*    rangeShift    :: Unused.                                           */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This structure is only used during font opening.                   */
  /*                                                                       */
  typedef struct  TT_TableDir_
  {
    TT_Fixed   version;      /* should be 0x10000 */
    TT_UShort  numTables;    /* number of tables  */

    TT_UShort  searchRange;    /* These parameters are only used  */
    TT_UShort  entrySelector;  /* for a dichotomy search in the   */
    TT_UShort  rangeShift;     /* directory.  We ignore them.     */

  } TT_TableDir;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_Table                                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure describes a given table of a TrueType font.         */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    Tag      :: A four-bytes tag describing the table.                 */
  /*    CheckSum :: The table checksum.  This value can be ignored.        */
  /*    Offset   :: The offset of the table from the start of the TrueType */
  /*                font in its resource.                                  */
  /*    Length   :: The table length (in bytes).                           */
  /*                                                                       */
  typedef struct  TT_Table_
  {
    TT_ULong  Tag;        /*        table type */
    TT_ULong  CheckSum;   /*    table checksum */
    TT_ULong  Offset;     /* table file offset */
    TT_ULong  Length;     /*      table length */

  } TT_Table;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_Header                                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to model a TrueType font header table.  All       */
  /*    fields follow the TrueType specification.                          */
  /*                                                                       */
  typedef struct  TT_Header_
  {
    TT_Fixed   Table_Version;
    TT_Fixed   Font_Revision;

    TT_Long    CheckSum_Adjust;
    TT_Long    Magic_Number;

    TT_UShort  Flags;
    TT_UShort  Units_Per_EM;

    TT_Long    Created [2];
    TT_Long    Modified[2];