1 /*
2 * Copyright (c) 1997, 2005, 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 sun.awt.image;
27
28 import java.awt.AWTException;
29 import java.awt.Component;
30 import java.awt.Graphics2D;
31 import java.awt.GraphicsConfiguration;
32 import java.awt.GraphicsDevice;
33 import java.awt.ImageCapabilities;
34 import java.awt.Rectangle;
35 import java.awt.Transparency;
36 import java.awt.geom.AffineTransform;
37 import java.awt.image.BufferedImage;
38 import java.awt.image.ColorModel;
39 import java.awt.image.DirectColorModel;
40 import java.awt.image.Raster;
41 import java.awt.image.VolatileImage;
42 import java.awt.image.WritableRaster;
43
44 public class BufferedImageGraphicsConfig
45 extends GraphicsConfiguration
46 {
47 private static final int numconfigs = BufferedImage.TYPE_BYTE_BINARY;
48 private static BufferedImageGraphicsConfig configs[] =
49 new BufferedImageGraphicsConfig[numconfigs];
50
51 public static BufferedImageGraphicsConfig getConfig(BufferedImage bImg) {
52 BufferedImageGraphicsConfig ret;
53 int type = bImg.getType();
54 if (type > 0 && type < numconfigs) {
55 ret = configs[type];
56 if (ret != null) {
57 return ret;
58 }
59 }
60 ret = new BufferedImageGraphicsConfig(bImg, null);
61 if (type > 0 && type < numconfigs) {
62 configs[type] = ret;
63 }
64 return ret;
65 }
66
67 GraphicsDevice gd;
68 ColorModel model;
69 Raster raster;
70
71 public BufferedImageGraphicsConfig(BufferedImage bufImg, Component comp) {
72 if (comp == null) {
73 this.gd = new BufferedImageDevice(this);
74 } else {
75 Graphics2D g2d = (Graphics2D)comp.getGraphics();
76 this.gd = g2d.getDeviceConfiguration().getDevice();
77 }
78 this.model = bufImg.getColorModel();
79 this.raster = bufImg.getRaster().createCompatibleWritableRaster(1, 1);
80 }
81
82 /**
83 * Return the graphics device associated with this configuration.
84 */
85 public GraphicsDevice getDevice() {
86 return gd;
87 }
88
89 /**
90 * Returns a BufferedImage with channel layout and color model
91 * compatible with this graphics configuration. This method
92 * has nothing to do with memory-mapping
93 * a device. This BufferedImage has
94 * a layout and color model
95 * that is closest to this native device configuration and thus
96 * can be optimally blitted to this device.
97 */
98 public BufferedImage createCompatibleImage(int width, int height) {
99 WritableRaster wr = raster.createCompatibleWritableRaster(width, height);
100 return new BufferedImage(model, wr, model.isAlphaPremultiplied(), null);
101 }
102
103 /**
104 * Returns the color model associated with this configuration.
105 */
106 public ColorModel getColorModel() {
107 return model;
108 }
109
110 /**
111 * Returns the color model associated with this configuration that
112 * supports the specified transparency.
113 */
114 public ColorModel getColorModel(int transparency) {
115
116 if (model.getTransparency() == transparency) {
117 return model;
118 }
119 switch (transparency) {
120 case Transparency.OPAQUE:
121 return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
122 case Transparency.BITMASK:
123 return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
124 case Transparency.TRANSLUCENT:
125 return ColorModel.getRGBdefault();
126 default:
127 return null;
128 }
129 }
130
131 /**
132 * Returns the default Transform for this configuration. This
133 * Transform is typically the Identity transform for most normal
134 * screens. Device coordinates for screen and printer devices will
135 * have the origin in the upper left-hand corner of the target region of
136 * the device, with X coordinates
137 * increasing to the right and Y coordinates increasing downwards.
138 * For image buffers, this Transform will be the Identity transform.
139 */
140 public AffineTransform getDefaultTransform() {
141 return new AffineTransform();
142 }
143
144 /**
145 *
146 * Returns a Transform that can be composed with the default Transform
147 * of a Graphics2D so that 72 units in user space will equal 1 inch
148 * in device space.
149 * Given a Graphics2D, g, one can reset the transformation to create
150 * such a mapping by using the following pseudocode:
151 * <pre>
152 * GraphicsConfiguration gc = g.getGraphicsConfiguration();
153 *
154 * g.setTransform(gc.getDefaultTransform());
155 * g.transform(gc.getNormalizingTransform());
156 * </pre>
157 * Note that sometimes this Transform will be identity (e.g. for
158 * printers or metafile output) and that this Transform is only
159 * as accurate as the information supplied by the underlying system.
160 * For image buffers, this Transform will be the Identity transform,
161 * since there is no valid distance measurement.
162 */
163 public AffineTransform getNormalizingTransform() {
164 return new AffineTransform();
165 }
166
167 public Rectangle getBounds() {
168 return new Rectangle(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE);
169 }
170 }