Function gdk_pixbuf_sys::gdk_pixbuf_new_from_stream_at_scale_async

pub unsafe extern "C" fn gdk_pixbuf_new_from_stream_at_scale_async(
    stream: *mut GInputStream, 
    width: c_int, 
    height: c_int, 
    preserve_aspect_ratio: gboolean, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)