Function vips_sys::im_render_fade

pub unsafe extern "C" fn im_render_fade(
    in_: *mut VipsImage, 
    out: *mut VipsImage, 
    mask: *mut VipsImage, 
    width: c_int, 
    height: c_int, 
    max: c_int, 
    fps: c_int, 
    steps: c_int, 
    priority: c_int, 
    notify: Option<unsafe extern "C" fn(arg1: *mut VipsImage, arg2: *mut VipsRect, arg3: *mut c_void)>, 
    client: *mut c_void
) -> c_int