tttypes.h

Qt/Embedded是一个多平台的C++图形用户界面应用程序框架

  /*    maxStackElements      :: The maximum number of stack elements used */
  /*                             during bytecode interpretation.           */
  /*                                                                       */
  /*    maxSizeOfInstructions :: The maximum number of TrueType opcodes    */
  /*                             used for glyph hinting.                   */
  /*                                                                       */
  /*    maxComponentElements  :: An obscure value related to composite     */
  /*                             glyphs definitions.                       */
  /*                                                                       */
  /*    maxComponentDepth     :: An obscure value related to composite     */
  /*                             glyphs definitions.  Probably the maximum */
  /*                             number of simple glyphs in a composite.   */
  /*                                                                       */
  /* <Note>                                                                */
  /*    This structure is only used during font loading.                   */
  /*                                                                       */
  typedef struct  TT_MaxProfile_
  {
    TT_Fixed   version;
    TT_UShort  numGlyphs;
    TT_UShort  maxPoints;
    TT_UShort  maxContours;
    TT_UShort  maxCompositePoints;
    TT_UShort  maxCompositeContours;
    TT_UShort  maxZones;
    TT_UShort  maxTwilightPoints;
    TT_UShort  maxStorage;
    TT_UShort  maxFunctionDefs;
    TT_UShort  maxInstructionDefs;
    TT_UShort  maxStackElements;
    TT_UShort  maxSizeOfInstructions;
    TT_UShort  maxComponentElements;
    TT_UShort  maxComponentDepth;

  } TT_MaxProfile;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_LongMetrics                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure modeling the long metrics of the `hmtx' and `vmtx'     */
  /*    TrueType tables.  The values are expressed in font units.          */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    advance :: The advance width or height for the glyph.              */
  /*    bearing :: The left-side or top-side bearing for the glyph.        */
  /*                                                                       */
  typedef struct  TT_LongMetrics_
  {
    TT_UShort  advance;
    TT_Short   bearing;

  } TT_LongMetrics;


  /*************************************************************************/
  /*                                                                       */
  /* <Type> TT_ShortMetrics                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A simple type to model the short metrics of the `hmtx' and `vmtx'  */
  /*    tables.                                                            */
  /*                                                                       */
  typedef TT_Short  TT_ShortMetrics;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_NameRec                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure modeling TrueType name records.  Name records are used */
  /*    to store important strings like family name, style name,           */
  /*    copyright, etc. in _localized_ versions (i.e., language, encoding, */
  /*    etc).                                                              */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    platformID   :: The ID of the name's encoding platform.            */
  /*                                                                       */
  /*    encodingID   :: The platform-specific ID for the name's encoding.  */
  /*                                                                       */
  /*    languageID   :: The platform-specific ID for the name's language.  */
  /*                                                                       */
  /*    nameID       :: The ID specifying what kind of name this is.       */
  /*                                                                       */
  /*    stringLength :: The length of the string in bytes.                 */
  /*                                                                       */
  /*    stringOffset :: The offset to the string in the `name' table.      */
  /*                                                                       */
  /*    string       :: A pointer to the string's bytes.  Note that these  */
  /*                    are usually UTF-16 encoded characters.             */
  /*                                                                       */
  typedef struct  TT_NameRec_
  {
    TT_UShort  platformID;
    TT_UShort  encodingID;
    TT_UShort  languageID;
    TT_UShort  nameID;
    TT_UShort  stringLength;
    TT_UShort  stringOffset;

    /* this last field is not defined in the spec */
    /* but used by the FreeType engine            */

    TT_Byte*   string;

  } TT_NameRec;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_NameTable                                                       */
  /*                                                                       */
  /* <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.                        */
  /*                                                                       */
  /*    storage        :: The names storage area.                          */
  /*                                                                       */
  typedef struct  TT_NameTable_
  {
    TT_UShort    format;
    TT_UShort    numNameRecords;
    TT_UShort    storageOffset;
    TT_NameRec*  names;
    TT_Byte*     storage;

  } TT_NameTable;


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


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_GaspRange                                                       */
  /*                                                                       */
  /* <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_GaspRange_
  {
    TT_UShort  maxPPEM;
    TT_UShort  gaspFlag;

  } TT_GaspRange;


#define TT_GASP_GRIDFIT  0x01
#define TT_GASP_DOGRAY   0x02


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_Gasp                                                            */
  /*                                                                       */
  /* <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_
  {
    TT_UShort      version;
    TT_UShort      numRanges;
    TT_GaspRange*  gaspRanges;

  } TT_Gasp;


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    TT_HdmxRec                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A small structure used to model the pre-computed widths of a given */
  /*    size.  They're 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    :: A