| /* |
| * Copyright (c) 2013, 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.Image; |
| import java.awt.image.ImageObserver; |
| import java.awt.image.MultiResolutionImage; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.function.Function; |
| import sun.awt.SoftCache; |
| |
| public class MultiResolutionToolkitImage extends ToolkitImage implements MultiResolutionImage { |
| |
| Image resolutionVariant; |
| |
| public MultiResolutionToolkitImage(Image lowResolutionImage, Image resolutionVariant) { |
| super(lowResolutionImage.getSource()); |
| this.resolutionVariant = resolutionVariant; |
| } |
| |
| @Override |
| public Image getResolutionVariant(double destWidth, double destHeight) { |
| checkSize(destWidth, destHeight); |
| return ((destWidth <= getWidth() && destHeight <= getHeight())) |
| ? this : resolutionVariant; |
| } |
| |
| public static Image map(MultiResolutionToolkitImage mrImage, |
| Function<Image, Image> mapper) { |
| Image baseImage = mapper.apply(mrImage); |
| Image rvImage = mapper.apply(mrImage.resolutionVariant); |
| return new MultiResolutionToolkitImage(baseImage, rvImage); |
| } |
| |
| 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)); |
| } |
| } |
| |
| public Image getResolutionVariant() { |
| return resolutionVariant; |
| } |
| |
| @Override |
| public List<Image> getResolutionVariants() { |
| return Arrays.<Image>asList(this, resolutionVariant); |
| } |
| |
| private static final int BITS_INFO = ImageObserver.SOMEBITS |
| | ImageObserver.FRAMEBITS | ImageObserver.ALLBITS; |
| |
| private static class ObserverCache { |
| |
| @SuppressWarnings("deprecation") |
| static final SoftCache INSTANCE = new SoftCache(); |
| } |
| |
| public static ImageObserver getResolutionVariantObserver( |
| final Image image, final ImageObserver observer, |
| final int imgWidth, final int imgHeight, |
| final int rvWidth, final int rvHeight) { |
| return getResolutionVariantObserver(image, observer, |
| imgWidth, imgHeight, rvWidth, rvHeight, false); |
| } |
| |
| public static ImageObserver getResolutionVariantObserver( |
| final Image image, final ImageObserver observer, |
| final int imgWidth, final int imgHeight, |
| final int rvWidth, final int rvHeight, boolean concatenateInfo) { |
| |
| if (observer == null) { |
| return null; |
| } |
| |
| synchronized (ObserverCache.INSTANCE) { |
| ImageObserver o = (ImageObserver) ObserverCache.INSTANCE.get(observer); |
| |
| if (o == null) { |
| |
| o = (Image resolutionVariant, int flags, |
| int x, int y, int width, int height) -> { |
| |
| if ((flags & (ImageObserver.WIDTH | BITS_INFO)) != 0) { |
| width = (width + 1) / 2; |
| } |
| |
| if ((flags & (ImageObserver.HEIGHT | BITS_INFO)) != 0) { |
| height = (height + 1) / 2; |
| } |
| |
| if ((flags & BITS_INFO) != 0) { |
| x /= 2; |
| y /= 2; |
| } |
| |
| if(concatenateInfo){ |
| flags &= ((ToolkitImage) image). |
| getImageRep().check(null); |
| } |
| |
| return observer.imageUpdate( |
| image, flags, x, y, width, height); |
| }; |
| |
| ObserverCache.INSTANCE.put(observer, o); |
| } |
| return o; |
| } |
| } |
| } |