sfdriver.c

智能设备中PDF阅读器的源码！用于windows mobile2003或者WM5以上

     *      previously selected a size that is listed in the BDF table.
     *      Should we change the BDF table format to include single offsets
     *      for `CHARSET_REGISTRY' and `CHARSET_ENCODING'?
     */
    error = tt_face_find_bdf_prop( face, "CHARSET_REGISTRY", &registry );
    if ( !error )
    {
      error = tt_face_find_bdf_prop( face, "CHARSET_ENCODING", &encoding );
      if ( !error )
      {
        if ( registry.type == BDF_PROPERTY_TYPE_ATOM &&
             encoding.type == BDF_PROPERTY_TYPE_ATOM )
        {
          *acharset_encoding = encoding.u.atom;
          *acharset_registry = registry.u.atom;
        }
        else
          error = FT_Err_Invalid_Argument;
      }
    }

    return error;
  }


  static const FT_Service_BDFRec  sfnt_service_bdf =
  {
    (FT_BDF_GetCharsetIdFunc) sfnt_get_charset_id,
    (FT_BDF_GetPropertyFunc)  tt_face_find_bdf_prop,
  };

#endif /* TT_CONFIG_OPTION_BDF */


  /*
   *  SERVICE LIST
   */

  static const FT_ServiceDescRec  sfnt_services[] =
  {
    { FT_SERVICE_ID_SFNT_TABLE,           &sfnt_service_sfnt_table },
    { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &sfnt_service_ps_name },
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
    { FT_SERVICE_ID_GLYPH_DICT,           &sfnt_service_glyph_dict },
#endif
#ifdef TT_CONFIG_OPTION_BDF
    { FT_SERVICE_ID_BDF,                  &sfnt_service_bdf },
#endif
    { FT_SERVICE_ID_TT_CMAP,              &tt_service_get_cmap_info },

    { NULL, NULL }
  };


  FT_CALLBACK_DEF( FT_Module_Interface )
  sfnt_get_interface( FT_Module    module,
                      const char*  module_interface )
  {
    FT_UNUSED( module );

    return ft_service_list_lookup( sfnt_services, module_interface );
  }


#ifdef FT_CONFIG_OPTION_OLD_INTERNALS

  FT_CALLBACK_DEF( FT_Error )
  tt_face_load_sfnt_header_stub( TT_Face      face,
                                 FT_Stream    stream,
                                 FT_Long      face_index,
                                 SFNT_Header  header )
  {
    FT_UNUSED( face );
    FT_UNUSED( stream );
    FT_UNUSED( face_index );
    FT_UNUSED( header );

    return FT_Err_Unimplemented_Feature;
  }


  FT_CALLBACK_DEF( FT_Error )
  tt_face_load_directory_stub( TT_Face      face,
                               FT_Stream    stream,
                               SFNT_Header  header )
  {
    FT_UNUSED( face );
    FT_UNUSED( stream );
    FT_UNUSED( header );

    return FT_Err_Unimplemented_Feature;
  }


  FT_CALLBACK_DEF( FT_Error )
  tt_face_load_hdmx_stub( TT_Face    face,
                          FT_Stream  stream )
  {
    FT_UNUSED( face );
    FT_UNUSED( stream );
    
    return FT_Err_Unimplemented_Feature;
  }                          


  FT_CALLBACK_DEF( void )
  tt_face_free_hdmx_stub( TT_Face  face )
  {
    FT_UNUSED( face );
  }


  FT_CALLBACK_DEF( FT_Error )
  tt_face_set_sbit_strike_stub( TT_Face    face,
                                FT_UInt    x_ppem,
                                FT_UInt    y_ppem,
                                FT_ULong*  astrike_index )
  {
    /*
     * We simply forge a FT_Size_Request and call the real function
     * that does all the work.
     *
     * This stub might be called by libXfont in the X.Org Xserver,
     * compiled against version 2.1.8 or newer.
     */

    FT_Size_RequestRec  req;


    req.type           = FT_SIZE_REQUEST_TYPE_NOMINAL;
    req.width          = (FT_F26Dot6)x_ppem;
    req.height         = (FT_F26Dot6)y_ppem;
    req.horiResolution = 0;
    req.vertResolution = 0;

    *astrike_index = 0x7FFFFFFFUL;

    return tt_face_set_sbit_strike( face, &req, astrike_index );    
  }                                


  FT_CALLBACK_DEF( FT_Error )
  tt_face_load_sbit_stub( TT_Face    face,
                          FT_Stream  stream )
  {
    FT_UNUSED( face );
    FT_UNUSED( stream );
    
    /*
     *  This function was originally implemented to load the sbit table. 
     *  However, it has been replaced by `tt_face_load_eblc', and this stub
     *  is only there for some rogue clients which would want to call it
     *  directly (which doesn't make much sense).
     */
    return FT_Err_Unimplemented_Feature;
  }                          


  FT_CALLBACK_DEF( void )
  tt_face_free_sbit_stub( TT_Face  face )
  {
    /* nothing to do in this stub */
    FT_UNUSED( face );
  }
  
  
  FT_CALLBACK_DEF( FT_Error )
  tt_face_load_charmap_stub( TT_Face    face,
                             void*      cmap,
                             FT_Stream  input )
  {
    FT_UNUSED( face );
    FT_UNUSED( cmap );
    FT_UNUSED( input );
    
    return FT_Err_Unimplemented_Feature;
  }                             


  FT_CALLBACK_DEF( FT_Error )
  tt_face_free_charmap_stub( TT_Face  face,
                             void*    cmap )
  {
    FT_UNUSED( face );
    FT_UNUSED( cmap );
    
    return 0;
  }                             
  
#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */


  static
  const SFNT_Interface  sfnt_interface =
  {
    tt_face_goto_table,

    sfnt_init_face,
    sfnt_load_face,
    sfnt_done_face,
    sfnt_get_interface,

    tt_face_load_any,

#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
    tt_face_load_sfnt_header_stub,
    tt_face_load_directory_stub,
#endif

    tt_face_load_head,
    tt_face_load_hhea,
    tt_face_load_cmap,
    tt_face_load_maxp,
    tt_face_load_os2,
    tt_face_load_post,

    tt_face_load_name,
    tt_face_free_name,

#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
    tt_face_load_hdmx_stub,
    tt_face_free_hdmx_stub,
#endif

    tt_face_load_kern,
    tt_face_load_gasp,
    tt_face_load_pclt,

#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
    /* see `ttload.h' */
    tt_face_load_bhed,
#else
    0,
#endif

#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
    tt_face_set_sbit_strike_stub,
    tt_face_load_sbit_stub,

    tt_find_sbit_image,
    tt_load_sbit_metrics,
#endif

#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
    tt_face_load_sbit_image,
#else
    0,
#endif

#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
    tt_face_free_sbit_stub,
#endif

#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
    /* see `ttpost.h' */
    tt_face_get_ps_name,
    tt_face_free_ps_names,
#else
    0,
    0,
#endif

#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
    tt_face_load_charmap_stub,
    tt_face_free_charmap_stub,
#endif

    /* since version 2.1.8 */

    tt_face_get_kerning,

    /* since version 2.2 */

    tt_face_load_font_dir,
    tt_face_load_hmtx,

#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
    /* see `ttsbit.h' and `sfnt.h' */
    tt_face_load_eblc,
    tt_face_free_eblc,

    tt_face_set_sbit_strike,
    tt_face_load_strike_metrics,
#else
    0,
    0,
    0,
    0,
#endif    

    tt_face_get_metrics
  };


  FT_CALLBACK_TABLE_DEF
  const FT_Module_Class  sfnt_module_class =
  {
    0,  /* not a font driver or renderer */
    sizeof( FT_ModuleRec ),

    "sfnt",     /* driver name                            */
    0x10000L,   /* driver version 1.0                     */
    0x20000L,   /* driver requires FreeType 2.0 or higher */

    (const void*)&sfnt_interface,  /* module specific interface */

    (FT_Module_Constructor)0,
    (FT_Module_Destructor) 0,
    (FT_Module_Requester)  sfnt_get_interface
  };


/* END */