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    1   /*
    2    * Copyright (c) 1997, 1998, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   
   26   package java.awt.image;
   27   
   28   /**
   29     * An interface for objects that wish to be informed when tiles
   30     * of a WritableRenderedImage become modifiable by some writer via
   31     * a call to getWritableTile, and when they become unmodifiable via
   32     * the last call to releaseWritableTile.
   33     *
   34     * @see WritableRenderedImage
   35     *
   36     * @author Thomas DeWeese
   37     * @author Daniel Rice
   38     */
   39   public interface TileObserver {
   40   
   41     /**
   42       * A tile is about to be updated (it is either about to be grabbed
   43       * for writing, or it is being released from writing).
   44       *
   45       * @param source the image that owns the tile.
   46       * @param tileX the X index of the tile that is being updated.
   47       * @param tileY the Y index of the tile that is being updated.
   48       * @param willBeWritable  If true, the tile will be grabbed for writing;
   49       *                        otherwise it is being released.
   50       */
   51       public void tileUpdate(WritableRenderedImage source,
   52                              int tileX, int tileY,
   53                              boolean willBeWritable);
   54   
   55   }

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