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][2];
50
51 public static BufferedImageGraphicsConfig getConfig(BufferedImage bImg) {
52 return getConfig(bImg, 1, 1);
53 }
54
55 public static BufferedImageGraphicsConfig getConfig(BufferedImage bImg,
56 double scaleX,
57 double scaleY)
58 {
59 BufferedImageGraphicsConfig ret;
60 int type = bImg.getType();
61 int index = (scaleX == 1 && scaleY == 1) ? 0 : 1;
62 if (type > 0 && type < numconfigs) {
63 ret = configs[type][index];
64 if (ret != null && ret.scaleX == scaleX && ret.scaleY == scaleY) {
65 return ret;
66 }
67 }
68 ret = new BufferedImageGraphicsConfig(bImg, null, scaleX, scaleY);
69 if (type > 0 && type < numconfigs) {
70 configs[type][index] = ret;
71 }
72 return ret;
73 }
74
75 GraphicsDevice gd;
76 ColorModel model;
77 Raster raster;
78 int width, height;
79 private final double scaleX;
80 private final double scaleY;
81
82 public BufferedImageGraphicsConfig(BufferedImage bufImg, Component comp) {
83 this(bufImg, comp, 1, 1);
84 }
85
86 public BufferedImageGraphicsConfig(BufferedImage bufImg, Component comp,
87 double scaleX, double scaleY)
88 {
89 if (comp == null) {
90 this.gd = new BufferedImageDevice(this);
91 } else {
92 Graphics2D g2d = (Graphics2D)comp.getGraphics();
93 this.gd = g2d.getDeviceConfiguration().getDevice();
94 }
95 this.model = bufImg.getColorModel();
96 this.raster = bufImg.getRaster().createCompatibleWritableRaster(1, 1);
97 this.width = bufImg.getWidth();
98 this.height = bufImg.getHeight();
99 this.scaleX = scaleX;
100 this.scaleY = scaleY;
101 }
102
103 /**
104 * Return the graphics device associated with this configuration.
105 */
106 public GraphicsDevice getDevice() {
107 return gd;
108 }
109
110 /**
111 * Returns a BufferedImage with channel layout and color model
112 * compatible with this graphics configuration. This method
113 * has nothing to do with memory-mapping
114 * a device. This BufferedImage has
115 * a layout and color model
116 * that is closest to this native device configuration and thus
117 * can be optimally blitted to this device.
118 */
119 public BufferedImage createCompatibleImage(int width, int height) {
120 WritableRaster wr = raster.createCompatibleWritableRaster(width, height);
121 return new BufferedImage(model, wr, model.isAlphaPremultiplied(), null);
122 }
123
124 /**
125 * Returns the color model associated with this configuration.
126 */
127 public ColorModel getColorModel() {
128 return model;
129 }
130
131 /**
132 * Returns the color model associated with this configuration that
133 * supports the specified transparency.
134 */
135 public ColorModel getColorModel(int transparency) {
136
137 if (model.getTransparency() == transparency) {
138 return model;
139 }
140 switch (transparency) {
141 case Transparency.OPAQUE:
142 return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
143 case Transparency.BITMASK:
144 return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
145 case Transparency.TRANSLUCENT:
146 return ColorModel.getRGBdefault();
147 default:
148 return null;
149 }
150 }
151
152 /**
153 * Returns the default Transform for this configuration. This
154 * Transform is typically the Identity transform for most normal
155 * screens. Device coordinates for screen and printer devices will
156 * have the origin in the upper left-hand corner of the target region of
157 * the device, with X coordinates
158 * increasing to the right and Y coordinates increasing downwards.
159 * For image buffers, this Transform will be the Identity transform.
160 */
161 public AffineTransform getDefaultTransform() {
162 return AffineTransform.getScaleInstance(scaleX, scaleY);
163 }
164
165 /**
166 *
167 * Returns a Transform that can be composed with the default Transform
168 * of a Graphics2D so that 72 units in user space will equal 1 inch
169 * in device space.
170 * Given a Graphics2D, g, one can reset the transformation to create
171 * such a mapping by using the following pseudocode:
172 * <pre>
173 * GraphicsConfiguration gc = g.getGraphicsConfiguration();
174 *
175 * g.setTransform(gc.getDefaultTransform());
176 * g.transform(gc.getNormalizingTransform());
177 * </pre>
178 * Note that sometimes this Transform will be identity (e.g. for
179 * printers or metafile output) and that this Transform is only
180 * as accurate as the information supplied by the underlying system.
181 * For image buffers, this Transform will be the Identity transform,
182 * since there is no valid distance measurement.
183 */
184 public AffineTransform getNormalizingTransform() {
185 return new AffineTransform();
186 }
187
188 public Rectangle getBounds() {
189 return new Rectangle(0, 0, width, height);
190 }
191 }