public static extern FIBITMAP ToneMapping(FIBITMAP dib, FREE_IMAGE_TMO tmo, double first_param, double second_param);
public static extern uint ToneMapping(uint dib, FREE_IMAGE_TMO tmo, double first_param, double second_param);
private static extern FIBITMAP ToneMappingWindows(FIBITMAP dib, FREE_IMAGE_TMO tmo, double first_param, double second_param);