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