Function vips_sys::im__balance

pub unsafe extern "C" fn im__balance(
    ref_: *mut VipsImage, 
    sec: *mut VipsImage, 
    out: *mut VipsImage, 
    ref_out: *mut *mut VipsImage, 
    sec_out: *mut *mut VipsImage, 
    dx: c_int, 
    dy: c_int, 
    balancetype: c_int
) -> c_int