--- /dev/null 2014-04-21 16:37:45.000000000 +0400 +++ new/src/share/classes/sun/awt/image/AbstractMultiResolutionImage.java 2014-04-21 16:37:44.000000000 +0400 @@ -0,0 +1,123 @@ +/* + * 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.Graphics; +import java.awt.Image; +import java.awt.image.*; + +/** + * This class provides default implementations for the + * MultiResolutionImage interface. The developer needs only + * to subclass this abstract class and define the getResolutionVariant, + * getResolutionVariants, and getBaseImage methods. + * + * + * For example, + * {@code + * public class CustomMultiResolutionImage extends AbstractMultiResolutionImage { + * + * int baseImageIndex; + * Image[] resolutionVariants; + * + * public CustomMultiResolutionImage(int baseImageIndex, + * Image... resolutionVariants) { + * this.baseImageIndex = baseImageIndex; + * this.resolutionVariants = resolutionVariants; + * } + * + * @Override + * public Image getResolutionVariant(float logicalDPIX, float logicalDPIY, + * float baseImageWidth, float baseImageHeight, + * float destImageWidth, float destImageHeight) { + * // return a resolution variant based on the given logical DPI, + * // base image size, or destination image size + * } + * + * @Override + * public List getResolutionVariants() { + * return Arrays.asList(resolutionVariants); + * } + * + * protected Image getBaseImage() { + * return resolutionVariants[baseImageIndex]; + * } + * } + * } + * + * @see java.awt.Image + * @see java.awt.image.MultiResolutionImage + * + * @since 1.9 + */ +public abstract class AbstractMultiResolutionImage extends java.awt.Image + implements MultiResolutionImage { + + /** + * @inheritDoc + */ + @Override + public int getWidth(ImageObserver observer) { + return getBaseImage().getWidth(null); + } + + /** + * @inheritDoc + */ + @Override + public int getHeight(ImageObserver observer) { + return getBaseImage().getHeight(null); + } + + /** + * @inheritDoc + */ + @Override + public ImageProducer getSource() { + return getBaseImage().getSource(); + } + + /** + * @inheritDoc + */ + @Override + public Graphics getGraphics() { + return getBaseImage().getGraphics(); + + } + + /** + * @inheritDoc + */ + @Override + public Object getProperty(String name, ImageObserver observer) { + return getBaseImage().getProperty(name, observer); + } + + /** + * @return base image + */ + protected abstract Image getBaseImage(); +}