+ * Generate an {@link InputStream} that you can {@link InputStream#reset()}
+ * for this {@link Image}.
+ * <p>
+ * This {@link InputStream} will (always) be a new one, and <b>you</b> are
+ * responsible for it.
+ * <p>
+ * Note: take care that the {@link InputStream} <b>must not</b> live past
+ * the {@link Image} life time!