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 }