gdk_pixbuf_new_from_stream_at_scale_async

procedure gdk_pixbuf_new_from_stream_at_scale_async(

  stream: PGInputStream;

  width: gint;

  height: gint;

  preserve_aspect_ratio: gboolean;

  cancellable: PGCancellable;

  callback: TGAsyncReadyCallback;

  user_data: gpointer

);