01 /*
02 * Copyright 1997-2007 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;
27
28 import java.awt.image.Raster;
29 import java.awt.image.ColorModel;
30
31 /**
32 * The <code>PaintContext</code> interface defines the encapsulated
33 * and optimized environment to generate color patterns in device
34 * space for fill or stroke operations on a
35 * {@link Graphics2D}. The <code>PaintContext</code> provides
36 * the necessary colors for <code>Graphics2D</code> operations in the
37 * form of a {@link Raster} associated with a {@link ColorModel}.
38 * The <code>PaintContext</code> maintains state for a particular paint
39 * operation. In a multi-threaded environment, several
40 * contexts can exist simultaneously for a single {@link Paint} object.
41 * @see Paint
42 * @version 10 Feb 1997
43 */
44
45 public interface PaintContext {
46 /**
47 * Releases the resources allocated for the operation.
48 */
49 public void dispose();
50
51 /**
52 * Returns the <code>ColorModel</code> of the output. Note that
53 * this <code>ColorModel</code> might be different from the hint
54 * specified in the
55 * {@link Paint#createContext(ColorModel, Rectangle, Rectangle2D,
56 AffineTransform, RenderingHints) createContext} method of
57 * <code>Paint</code>. Not all <code>PaintContext</code> objects are
58 * capable of generating color patterns in an arbitrary
59 * <code>ColorModel</code>.
60 * @return the <code>ColorModel</code> of the output.
61 */
62 ColorModel getColorModel();
63
64 /**
65 * Returns a <code>Raster</code> containing the colors generated for
66 * the graphics operation.
67 * @param x the x coordinate of the area in device space
68 * for which colors are generated.
69 * @param y the y coordinate of the area in device space
70 * for which colors are generated.
71 * @param w the width of the area in device space
72 * @param h the height of the area in device space
73 * @return a <code>Raster</code> representing the specified
74 * rectangular area and containing the colors generated for
75 * the graphics operation.
76 */
77 Raster getRaster(int x, int y, int w, int h);
78
79 }
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