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