1. /*

  2.  * @(#)TileObserver.java	1.7 00/02/02

  3.  *

  4.  * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.

  5.  * 

  6.  * This software is the proprietary information of Sun Microsystems, Inc.  

  7.  * Use is subject to license terms.

  8.  * 

  9.  */

  10. 

  11. package java.awt.image;

  12. 

  13. /**

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

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

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

  17.   * the last call to releaseWritableTile.

  18.   *

  19.   * @see WritableRenderedImage

  20.   *

  21.   * @author Thomas DeWeese

  22.   * @author Daniel Rice

  23.   */

  24. public interface TileObserver {

  25. 

  26.   /**

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

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

  29.     *

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

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

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

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

  34.     *                        otherwise it is being released.

  35.     */

  36.     public void tileUpdate(WritableRenderedImage source,

  37.                            int tileX, int tileY,

  38.                            boolean willBeWritable);

  39. 

  40. }