01 /*
02 * Copyright 1997-1998 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any 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, int tileX,
52 int tileY, boolean willBeWritable);
53
54 }
|