--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/classes/java/awt/image/AbstractMultiResolutionImage.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2015, 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 java.awt.image;
+
+import java.awt.Graphics;
+import java.awt.Image;
+
+/**
+ * This class provides default implementations of several {@code Image} methods
+ * for classes that want to implement the {@code MultiResolutionImage}
+ * interface.
+ *
+ * For example,
+ * <pre> {@code
+ * public class CustomMultiResolutionImage extends AbstractMultiResolutionImage {
+ *
+ *     final Image[] resolutionVariants;
+ *
+ *     public CustomMultiResolutionImage(Image... resolutionVariants) {
+ *          this.resolutionVariants = resolutionVariants;
+ *     }
+ *
+ *     public Image getResolutionVariant(
+ *             double destImageWidth, double destImageHeight) {
+ *         // return a resolution variant based on the given destination image size
+ *     }
+ *
+ *     public List<Image> getResolutionVariants() {
+ *         return Collections.unmodifiableList(Arrays.asList(resolutionVariants));
+ *     }
+ *
+ *     protected Image getBaseImage() {
+ *         return resolutionVariants[0];
+ *     }
+ * }
+ * } </pre>
+ *
+ * @see java.awt.Image
+ * @see java.awt.image.MultiResolutionImage
+ *
+ * @since 9
+ */
+public abstract class AbstractMultiResolutionImage extends java.awt.Image
+        implements MultiResolutionImage {
+
+    /**
+     * This method simply delegates to the same method on the base image and
+     * it is equivalent to: {@code getBaseImage().getWidth(observer)}.
+     *
+     * @return the width of the base image, or -1 if the width is not yet known
+     * @see #getBaseImage()
+     *
+     * @since 9
+     */
+    @Override
+    public int getWidth(ImageObserver observer) {
+        return getBaseImage().getWidth(observer);
+    }
+
+    /**
+     * This method simply delegates to the same method on the base image and
+     * it is equivalent to: {@code getBaseImage().getHeight(observer)}.
+     *
+     * @return the height of the base image, or -1 if the height is not yet known
+     * @see #getBaseImage()
+     *
+     * @since 9
+     */
+    @Override
+    public int getHeight(ImageObserver observer) {
+        return getBaseImage().getHeight(observer);
+    }
+
+    /**
+     * This method simply delegates to the same method on the base image and
+     * it is equivalent to: {@code getBaseImage().getSource()}.
+     *
+     * @return the image producer that produces the pixels for the base image
+     * @see #getBaseImage()
+     *
+     * @since 9
+     */
+    @Override
+    public ImageProducer getSource() {
+        return getBaseImage().getSource();
+    }
+
+    /**
+     * As per the contract of the base {@code Image#getGraphics()} method,
+     * this implementation will always throw {@code UnsupportedOperationException}
+     * since only off-screen images can return a {@code Graphics} object.
+     *
+     * @return throws {@code UnsupportedOperationException}
+     * @throws UnsupportedOperationException this method is not supported
+     */
+    @Override
+    public Graphics getGraphics() {
+        throw new UnsupportedOperationException("getGraphics() not supported"
+                + " on Multi-Resolution Images");
+    }
+
+    /**
+     * This method simply delegates to the same method on the base image and
+     * it is equivalent to: {@code getBaseImage().getProperty(name, observer)}.
+     *
+     * @return the value of the named property in the base image
+     * @see #getBaseImage()
+     *
+     * @since 9
+     */
+    @Override
+    public Object getProperty(String name, ImageObserver observer) {
+        return getBaseImage().getProperty(name, observer);
+    }
+
+    /**
+     * Return the base image representing the best version of the image for
+     * rendering at the default width and height.
+     *
+     * @return the base image of the set of multi-resolution images
+     *
+     * @since 9
+     */
+    protected abstract Image getBaseImage();
+}