pub unsafe extern "C" fn vlImageConvertToNormalMap(
    lpSourceRGBA8888: *mut vlByte,
    lpDestRGBA8888: *mut vlByte,
    uiWidth: vlUInt,
    uiHeight: vlUInt,
    KernelFilter: VTFKernelFilter,
    HeightConversionMethod: VTFHeightConversionMethod,
    NormalAlphaResult: VTFNormalAlphaResult,
    bMinimumZ: vlByte,
    sScale: vlSingle,
    bWrap: vlBool,
    bInvertX: vlBool,
    bInvertY: vlBool
) -> vlBool