Function vips_sys::im_sharpen

pub unsafe extern "C" fn im_sharpen(
    in_: *mut VipsImage, 
    out: *mut VipsImage, 
    mask_size: c_int, 
    x1: f64, 
    y2: f64, 
    y3: f64, 
    m1: f64, 
    m2: f64
) -> c_int