java swing 实现ios7毛玻璃效果，高斯模糊算法

/* * Copyright (c) 2007, Romain Guy * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * Neither the name of the TimingFramework project nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ import java.awt.image.BufferedImage; import java.awt.image.ColorModel; import java.awt.image.Raster; import java.awt.image.WritableRaster; import java.awt.GraphicsConfiguration; import java.awt.Transparency; import java.awt.Graphics; import java.awt.GraphicsEnvironment; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.io.IOException; import java.net.URL; import javax.imageio.ImageIO; /** * <p><code>GraphicsUtilities</code> contains a set of tools to perform * common graphics operations easily. These operations are divided into * several themes, listed below.</p> * <h2>Compatible Images</h2> * <p>Compatible images can, and should, be used to increase drawing * performance. This class provides a number of methods to load compatible * images directly from files or to convert existing images to compatibles * images.</p> * <h2>Creating Thumbnails</h2> * <p>This class provides a number of methods to easily scale down images. * Some of these methods offer a trade-off between speed and result quality and * shouuld be used all the time. They also offer the advantage of producing * compatible images, thus automatically resulting into better runtime * performance.</p> * <p>All these methodes are both faster than * {@link java.awt.Image#getScaledInstance(int, int, int)} and produce * better-looking results than the various <code>drawImage()</code> methods * in {@link java.awt.Graphics}, which can be used for image scaling.</p> * <h2>Image Manipulation</h2> * <p>This class provides two methods to get and set pixels in a buffered image. * These methods try to avoid unmanaging the image in order to keep good * performance.</p> * * @author Romain Guy <romain.guy@mac.com> */ public class GraphicsUtilities { private GraphicsUtilities() { } // Returns the graphics configuration for the primary screen private static GraphicsConfiguration getGraphicsConfiguration() { return GraphicsEnvironment.getLocalGraphicsEnvironment(). getDefaultScreenDevice().getDefaultConfiguration(); } /** * <p>Returns a new <code>BufferedImage</code> using the same color model * as the image passed as a parameter. The returned image is only compatible * with the image passed as a parameter. This does not mean the returned * image is compatible with the hardware.</p> * * @param image the reference image from which the color model of the new * image is obtained * @return a new <code>BufferedImage</code>, compatible with the color model * of <code>image</code> */ public static BufferedImage createColorModelCompatibleImage(BufferedImage image) { ColorModel cm = image.getColorModel(); return new BufferedImage(cm, cm.createCompatibleWritableRaster(image.getWidth(), image.getHeight()), cm.isAlphaPremultiplied(), null); } /** * <p>Returns a new compatible image with the same width, height and * transparency as the image specified as a parameter.</p> * * @see java.awt.Transparency * @see #createCompatibleImage(int, int) * @see #createCompatibleImage(java.awt.image.BufferedImage, int, int) * @see #createCompatibleTranslucentImage(int, int) * @see #loadCompatibleImage(java.net.URL) * @see #toCompatibleImage(java.awt.image.BufferedImage) * @param image the reference image from which the dimension and the * transparency of the new image are obtained * @return a new compatible <code>BufferedImage</code> with the same * dimension and transparency as <code>image</code> */ public static BufferedImage createCompatibleImage(BufferedImage image) { return createCompatibleImage(image, image.getWidth(), image.getHeight()); } /** * <p>Returns a new compatible image of the specified width and height, and * the same transparency setting as the image specified as a parameter.</p> * * @see java.awt.Transparency * @see #createCompatibleImage(java.awt.image.BufferedImage) * @see #createCompatibleImage(int, int) * @see #createCompatibleTranslucentImage(int, int) * @see #loadCompatibleImage(java.net.URL) * @see #toCompatibleImage(java.awt.image.BufferedImage) * @param width the width of the new image * @param height the height of the new image * @param image the reference image from which the transparency of the new * image is obtained * @return a new compatible <code>BufferedImage</code> with the same * transparency as <code>image</code> and the specified dimension */ public static BufferedImage createCompatibleImage(BufferedImage image, int width, int height) { return getGraphicsConfiguration().createCompatibleImage(width, height, image.getTransparency()); } /** * <p>Returns a new opaque compatible image of the specified width and * height.</p> * * @see #createCompatibleImage(java.awt.image.BufferedImage) * @see #createCompatibleImage(java.awt.image.BufferedImage, int, int) * @see #createCompatibleTranslucentImage(int, int) * @see #loadCompatibleImage(java.net.URL) * @see #toCompatibleImage(java.awt.image.BufferedImage) * @param width the width of the new image * @param height the height of the new image * @return a new opaque compatible <code>BufferedImage</code> of the * specified width and height */ public static BufferedImage createCompatibleImage(int width, int height) { return getGraphicsConfiguration().createCompatibleImage(width, height); } /** * <p>Returns a new translucent compatible image of the specified width * and height.</p> * * @see #createCompatibleImage(java.awt.image.BufferedImage) * @see #createCompatibleImage(java.awt.image.BufferedImage, int, int) * @see #createCompatibleImage(int, int) * @see #loadCompatibleImage(java.net.URL) * @see #toCompatibleImage(java.awt.image.BufferedImage) * @