Function vlfeat_sys::vl_imgradient_polar_f_callback

pub unsafe extern "C" fn vl_imgradient_polar_f_callback(
    sourceImage: *const f32, 
    sourceImageWidth: c_int, 
    sourceImageHeight: c_int, 
    dstImage: *mut f32, 
    dstWidth: c_int, 
    dstHeight: c_int, 
    octave: c_int, 
    level: c_int, 
    params: *mut c_void
)