Function ipp_sys::ippiColorToGray_64f_C3C1R

pub unsafe extern "C" fn ippiColorToGray_64f_C3C1R(
    pSrc: *const f64, 
    srcStep: i32, 
    pDst: *mut f64, 
    dstStep: i32, 
    roiSize: IppiSize, 
    coeffs: *const f64
) -> i32