/*

 * Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.awt;

/**

 * Interface used by Swing to make copies from the Swing back buffer

 * more optimal when using BufferStrategy; no need to copy the entire

 * buffer when only a small sub-region has changed.

 * @see javax.swing.BufferStrategyPaintManager

 *

 */

public interface SubRegionShowable {

    /**

     * Shows the specific subregion.

     */

    public void show(int x1, int y1, int x2, int y2);

    /**

     * Shows the specified region if the buffer is not lost and the dimensions

     * of the back-buffer match those of the component.

     *

     * @return true if successful

     */

    // NOTE: this is invoked by swing on the toolkit thread!

    public boolean showIfNotLost(int x1, int y1, int x2, int y2);

}