sfnt.h

这是osg的第三方插件库

  /* <Input>                                                               */
  /*    face          :: The target face object.                           */
  /*                                                                       */
  /*    x_ppem        :: The horizontal resolution in points per EM.       */
  /*                                                                       */
  /*    y_ppem        :: The vertical resolution in points per EM.         */
  /*                                                                       */
  /* <Output>                                                              */
  /*    astrike_index :: The index of the sbit strike.                     */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.  Returns an error if no     */
  /*    sbit strike exists for the selected ppem values.                   */
  /*                                                                       */
  typedef FT_Error
  (*TT_Set_SBit_Strike_Func)( TT_Face    face,
                              FT_UInt    x_ppem,
                              FT_UInt    y_ppem,
                              FT_ULong  *astrike_index );


  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    TT_Get_PS_Name_Func                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Gets the PostScript glyph name of a glyph.                         */
  /*                                                                       */
  /* <Input>                                                               */
  /*    idx  :: The glyph index.                                           */
  /*                                                                       */
  /*    PSname :: The address of a string pointer.  Will be NULL in case   */
  /*              of error, otherwise it is a pointer to the glyph name.   */
  /*                                                                       */
  /*              You must not modify the returned string!                 */
  /*                                                                       */
  /* <Output>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  typedef FT_Error
  (*TT_Get_PS_Name_Func)( TT_Face      face,
                          FT_UInt      idx,
                          FT_String**  PSname );


  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    TT_Load_Metrics_Func                                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Loads the horizontal or vertical header in a face object.          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face     :: A handle to the target face object.                    */
  /*                                                                       */
  /*    stream   :: The input stream.                                      */
  /*                                                                       */
  /*    vertical :: A boolean flag.  If set, load vertical metrics.        */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  typedef FT_Error
  (*TT_Load_Metrics_Func)( TT_Face    face,
                           FT_Stream  stream,
                           FT_Bool    vertical );


  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    TT_Load_Table_Func                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Loads a given TrueType table.                                      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face   :: A handle to the target face object.                      */
  /*                                                                       */
  /*    stream :: The input stream.                                        */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The function will use `face->goto_table' to seek the stream to     */
  /*    the start of the table.                                            */
  /*                                                                       */
  typedef FT_Error
  (*TT_Load_Table_Func)( TT_Face    face,
                         FT_Stream  stream );


  /*************************************************************************/
  /*                                                                       */
  /* <FuncType>                                                            */
  /*    TT_Free_Table_Func                                                 */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Frees a given TrueType table.                                      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to the target face object.                        */
  /*                                                                       */
  typedef void
  (*TT_Free_Table_Func)( TT_Face  face );


  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    SFNT_Interface                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This structure holds pointers to the functions used to load and    */
  /*    free the basic tables that are required in a `sfnt' font file.     */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    Check the various xxx_Func() descriptions for details.             */
  /*                                                                       */
  typedef struct  SFNT_Interface_
  {
    TT_Loader_GotoTableFunc      goto_table;

    TT_Init_Face_Func            init_face;
    TT_Load_Face_Func            load_face;
    TT_Done_Face_Func            done_face;
    FT_Module_Requester          get_interface;

    TT_Load_Any_Func             load_any;
    TT_Load_SFNT_HeaderRec_Func  load_sfnt_header;
    TT_Load_Directory_Func       load_directory;

    /* these functions are called by `load_face' but they can also  */
    /* be called from external modules, if there is a need to do so */
    TT_Load_Table_Func           load_header;
    TT_Load_Metrics_Func         load_metrics;
    TT_Load_Table_Func           load_charmaps;
    TT_Load_Table_Func           load_max_profile;
    TT_Load_Table_Func           load_os2;
    TT_Load_Table_Func           load_psnames;

    TT_Load_Table_Func           load_names;
    TT_Free_Table_Func           free_names;

    /* optional tables */
    TT_Load_Table_Func           load_hdmx;
    TT_Free_Table_Func           free_hdmx;

    TT_Load_Table_Func           load_kerning;
    TT_Load_Table_Func           load_gasp;
    TT_Load_Table_Func           load_pclt;

    /* see `ttload.h' */
    TT_Load_Table_Func           load_bitmap_header;

    /* see `ttsbit.h' */
    TT_Set_SBit_Strike_Func      set_sbit_strike;
    TT_Load_Table_Func           load_sbits;
    TT_Find_SBit_Image_Func      find_sbit_image;
    TT_Load_SBit_Metrics_Func    load_sbit_metrics;
    TT_Load_SBit_Image_Func      load_sbit_image;
    TT_Free_Table_Func           free_sbits;

    /* see `ttpost.h' */
    TT_Get_PS_Name_Func          get_psname;
    TT_Free_Table_Func           free_psnames;

  } SFNT_Interface;


  /* transitional */
  typedef SFNT_Interface*   SFNT_Service;


FT_END_HEADER

#endif /* __SFNT_H__ */


/* END */