/*

 * 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

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

 *

 * 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.

 *

 */

package java.awt.image;

/**

  * An interface for objects that wish to be informed when tiles

  * of a WritableRenderedImage become modifiable by some writer via

  * a call to getWritableTile, and when they become unmodifiable via

  * the last call to releaseWritableTile.

  *

  * @see WritableRenderedImage

  *

  * @author Thomas DeWeese

  * @author Daniel Rice

  */

public interface TileObserver {

  /**

    * A tile is about to be updated (it is either about to be grabbed

    * for writing, or it is being released from writing).

    *

    * @param source the image that owns the tile.

    * @param tileX the X index of the tile that is being updated.

    * @param tileY the Y index of the tile that is being updated.

    * @param willBeWritable  If true, the tile will be grabbed for writing;

    *                        otherwise it is being released.

    */

    public void tileUpdate(WritableRenderedImage source,

                           int tileX, int tileY,

                           boolean willBeWritable);

}