1. /*

  2.  * @(#)TileObserver.java	1.9 03/01/23

  3.  *

  4.  * Copyright 2003 Sun Microsystems, Inc. All rights reserved.

  5.  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

  6.  */

  7. 

  8. package java.awt.image;

  9. 

  10. /**

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

  12.   * of a WritableRenderedImage become modifiable by some writer via

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

  14.   * the last call to releaseWritableTile.

  15.   *

  16.   * @see WritableRenderedImage

  17.   *

  18.   * @author Thomas DeWeese

  19.   * @author Daniel Rice

  20.   */

  21. public interface TileObserver {

  22. 

  23.   /**

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

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

  26.     *

  27.     * @param source the image that owns the tile.

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

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

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

  31.     *                        otherwise it is being released.

  32.     */

  33.     public void tileUpdate(WritableRenderedImage source,

  34.                            int tileX, int tileY,

  35.                            boolean willBeWritable);

  36. 

  37. }