internal static extern uint ConvertToType(uint dib, FreeImageType type, int scale);
 internal static extern bool FIFSupportsExportType(FIF format, FreeImageType ftype);
 internal static extern uint AllocateT(FreeImageType ftype, int width,
                                       int height, int bpp, uint red_mask, uint green_mask,
                                       uint blue_mask);
 internal static extern bool FIFSupportsExportType(FIF format, FreeImageType ftype);
 internal static extern uint ConvertToType(uint dib, FreeImageType type, int scale);
 internal static extern uint AllocateT(FreeImageType ftype, int width, 
     int height, int bpp, uint red_mask, uint green_mask,
     uint blue_mask);