author | ddehaven |
Tue, 19 Aug 2014 10:32:16 -0700 | |
changeset 26037 | 508779ce6619 |
parent 26019 | jdk/src/share/classes/sun/awt/image/MultiResolutionCachedImage.java@10a56d28f48d |
parent 25859 | jdk/src/share/classes/sun/awt/image/MultiResolutionCachedImage.java@3317bb8137f4 |
child 32125 | 008f0a0d17e0 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.awt.image; |
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import java.awt.Dimension; |
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import java.awt.Image; |
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import java.awt.geom.Dimension2D; |
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import java.awt.image.ImageObserver; |
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import java.util.Arrays; |
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import java.util.List; |
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import java.util.function.Function; |
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import java.util.function.BiFunction; |
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import java.util.stream.Collectors; |
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public class MultiResolutionCachedImage extends AbstractMultiResolutionImage { |
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private final int baseImageWidth; |
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private final int baseImageHeight; |
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private final Dimension2D[] sizes; |
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private final BiFunction<Integer, Integer, Image> mapper; |
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private int availableInfo; |
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public MultiResolutionCachedImage(int baseImageWidth, int baseImageHeight, |
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BiFunction<Integer, Integer, Image> mapper) { |
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this(baseImageWidth, baseImageHeight, new Dimension[]{new Dimension( |
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baseImageWidth, baseImageHeight) |
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}, mapper); |
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} |
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public MultiResolutionCachedImage(int baseImageWidth, int baseImageHeight, |
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Dimension2D[] sizes, BiFunction<Integer, Integer, Image> mapper) { |
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this.baseImageWidth = baseImageWidth; |
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this.baseImageHeight = baseImageHeight; |
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this.sizes = (sizes == null) ? null : Arrays.copyOf(sizes, sizes.length); |
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this.mapper = mapper; |
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} |
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@Override |
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public Image getResolutionVariant(int width, int height) { |
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ImageCache cache = ImageCache.getInstance(); |
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ImageCacheKey key = new ImageCacheKey(this, width, height); |
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Image resolutionVariant = cache.getImage(key); |
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if (resolutionVariant == null) { |
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resolutionVariant = mapper.apply(width, height); |
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cache.setImage(key, resolutionVariant); |
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} |
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preload(resolutionVariant, availableInfo); |
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return resolutionVariant; |
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} |
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@Override |
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public List<Image> getResolutionVariants() { |
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return Arrays.stream(sizes).map((Function<Dimension2D, Image>) size |
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-> getResolutionVariant((int) size.getWidth(), |
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(int) size.getHeight())).collect(Collectors.toList()); |
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} |
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public MultiResolutionCachedImage map(Function<Image, Image> mapper) { |
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return new MultiResolutionCachedImage(baseImageWidth, baseImageHeight, |
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sizes, (width, height) -> |
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mapper.apply(getResolutionVariant(width, height))); |
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} |
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@Override |
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public int getWidth(ImageObserver observer) { |
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updateInfo(observer, ImageObserver.WIDTH); |
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return super.getWidth(observer); |
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} |
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@Override |
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public int getHeight(ImageObserver observer) { |
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updateInfo(observer, ImageObserver.HEIGHT); |
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return super.getHeight(observer); |
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} |
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@Override |
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public Object getProperty(String name, ImageObserver observer) { |
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updateInfo(observer, ImageObserver.PROPERTIES); |
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return super.getProperty(name, observer); |
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} |
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@Override |
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protected Image getBaseImage() { |
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return getResolutionVariant(baseImageWidth, baseImageHeight); |
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} |
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private void updateInfo(ImageObserver observer, int info) { |
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availableInfo |= (observer == null) ? ImageObserver.ALLBITS : info; |
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} |
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private static int getInfo(Image image) { |
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if (image instanceof ToolkitImage) { |
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return ((ToolkitImage) image).getImageRep().check( |
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(img, infoflags, x, y, w, h) -> false); |
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} |
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return 0; |
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} |
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private static void preload(Image image, int availableInfo) { |
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if (availableInfo != 0 && image instanceof ToolkitImage) { |
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((ToolkitImage) image).preload(new ImageObserver() { |
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int flags = availableInfo; |
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|
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@Override |
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public boolean imageUpdate(Image img, int infoflags, |
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int x, int y, int width, int height) { |
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flags &= ~infoflags; |
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return (flags != 0) && ((infoflags |
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& (ImageObserver.ERROR | ImageObserver.ABORT)) == 0); |
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} |
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}); |
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} |
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} |
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|
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private static class ImageCacheKey implements ImageCache.PixelsKey { |
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|
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private final int pixelCount; |
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private final int hash; |
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|
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private final int w; |
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private final int h; |
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private final Image baseImage; |
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|
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ImageCacheKey(final Image baseImage, |
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final int w, final int h) { |
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this.baseImage = baseImage; |
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this.w = w; |
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this.h = h; |
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this.pixelCount = w * h; |
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hash = hash(); |
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} |
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|
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@Override |
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public int getPixelCount() { |
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return pixelCount; |
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} |
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|
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private int hash() { |
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int hash = baseImage.hashCode(); |
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hash = 31 * hash + w; |
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hash = 31 * hash + h; |
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return hash; |
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} |
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|
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@Override |
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public int hashCode() { |
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return hash; |
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} |
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|
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@Override |
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public boolean equals(Object obj) { |
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if (obj instanceof ImageCacheKey) { |
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ImageCacheKey key = (ImageCacheKey) obj; |
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return baseImage == key.baseImage && w == key.w && h == key.h; |
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} |
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return false; |
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} |
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} |
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} |