1 /* 2 * Copyright (c) 2013, 2014, 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 package sun.awt.image; 26 27 import java.awt.Image; 28 import java.awt.image.ImageObserver; 29 import java.awt.image.MultiResolutionImage; 30 import java.util.Arrays; 31 import java.util.List; 32 import java.util.function.Function; 33 import sun.awt.SoftCache; 34 35 public class MultiResolutionToolkitImage extends ToolkitImage implements MultiResolutionImage { 36 37 Image resolutionVariant; 38 MultiResolutionToolkitImage(Image lowResolutionImage, Image resolutionVariant)39 public MultiResolutionToolkitImage(Image lowResolutionImage, Image resolutionVariant) { 40 super(lowResolutionImage.getSource()); 41 this.resolutionVariant = resolutionVariant; 42 } 43 44 @Override getResolutionVariant(double destWidth, double destHeight)45 public Image getResolutionVariant(double destWidth, double destHeight) { 46 checkSize(destWidth, destHeight); 47 return ((destWidth <= getWidth() && destHeight <= getHeight())) 48 ? this : resolutionVariant; 49 } 50 map(MultiResolutionToolkitImage mrImage, Function<Image, Image> mapper)51 public static Image map(MultiResolutionToolkitImage mrImage, 52 Function<Image, Image> mapper) { 53 Image baseImage = mapper.apply(mrImage); 54 Image rvImage = mapper.apply(mrImage.resolutionVariant); 55 return new MultiResolutionToolkitImage(baseImage, rvImage); 56 } 57 checkSize(double width, double height)58 private static void checkSize(double width, double height) { 59 if (width <= 0 || height <= 0) { 60 throw new IllegalArgumentException(String.format( 61 "Width (%s) or height (%s) cannot be <= 0", width, height)); 62 } 63 64 if (!Double.isFinite(width) || !Double.isFinite(height)) { 65 throw new IllegalArgumentException(String.format( 66 "Width (%s) or height (%s) is not finite", width, height)); 67 } 68 } 69 getResolutionVariant()70 public Image getResolutionVariant() { 71 return resolutionVariant; 72 } 73 74 @Override getResolutionVariants()75 public List<Image> getResolutionVariants() { 76 return Arrays.<Image>asList(this, resolutionVariant); 77 } 78 79 private static final int BITS_INFO = ImageObserver.SOMEBITS 80 | ImageObserver.FRAMEBITS | ImageObserver.ALLBITS; 81 82 private static class ObserverCache { 83 84 @SuppressWarnings("deprecation") 85 static final SoftCache INSTANCE = new SoftCache(); 86 } 87 getResolutionVariantObserver( final Image image, final ImageObserver observer, final int imgWidth, final int imgHeight, final int rvWidth, final int rvHeight)88 public static ImageObserver getResolutionVariantObserver( 89 final Image image, final ImageObserver observer, 90 final int imgWidth, final int imgHeight, 91 final int rvWidth, final int rvHeight) { 92 return getResolutionVariantObserver(image, observer, 93 imgWidth, imgHeight, rvWidth, rvHeight, false); 94 } 95 getResolutionVariantObserver( final Image image, final ImageObserver observer, final int imgWidth, final int imgHeight, final int rvWidth, final int rvHeight, boolean concatenateInfo)96 public static ImageObserver getResolutionVariantObserver( 97 final Image image, final ImageObserver observer, 98 final int imgWidth, final int imgHeight, 99 final int rvWidth, final int rvHeight, boolean concatenateInfo) { 100 101 if (observer == null) { 102 return null; 103 } 104 105 synchronized (ObserverCache.INSTANCE) { 106 ImageObserver o = (ImageObserver) ObserverCache.INSTANCE.get(observer); 107 108 if (o == null) { 109 110 o = (Image resolutionVariant, int flags, 111 int x, int y, int width, int height) -> { 112 113 if ((flags & (ImageObserver.WIDTH | BITS_INFO)) != 0) { 114 width = (width + 1) / 2; 115 } 116 117 if ((flags & (ImageObserver.HEIGHT | BITS_INFO)) != 0) { 118 height = (height + 1) / 2; 119 } 120 121 if ((flags & BITS_INFO) != 0) { 122 x /= 2; 123 y /= 2; 124 } 125 126 if(concatenateInfo){ 127 flags &= ((ToolkitImage) image). 128 getImageRep().check(null); 129 } 130 131 return observer.imageUpdate( 132 image, flags, x, y, width, height); 133 }; 134 135 ObserverCache.INSTANCE.put(observer, o); 136 } 137 return o; 138 } 139 } 140 } 141