| /* |
| * Copyright (c) 2005, 2006, 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 javax.swing.plaf.nimbus; |
| |
| import java.awt.AlphaComposite; |
| import java.awt.Graphics2D; |
| import java.awt.Transparency; |
| import java.awt.GraphicsConfiguration; |
| import java.awt.GraphicsEnvironment; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.Raster; |
| import java.awt.image.WritableRaster; |
| import java.awt.image.ColorModel; |
| |
| /** |
| * EffectUtils |
| * |
| * @author Created by Jasper Potts (Jun 18, 2007) |
| */ |
| class EffectUtils { |
| |
| /** |
| * Clear a transparent image to 100% transparent |
| * |
| * @param img The image to clear |
| */ |
| static void clearImage(BufferedImage img) { |
| Graphics2D g2 = img.createGraphics(); |
| g2.setComposite(AlphaComposite.Clear); |
| g2.fillRect(0, 0, img.getWidth(), img.getHeight()); |
| g2.dispose(); |
| } |
| |
| // ================================================================================================================= |
| // Blur |
| |
| /** |
| * Apply Gaussian Blur to Image |
| * |
| * @param src The image tp |
| * @param dst The destination image to draw blured src image into, null if you want a new one created |
| * @param radius The blur kernel radius |
| * @return The blured image |
| */ |
| static BufferedImage gaussianBlur(BufferedImage src, BufferedImage dst, int radius) { |
| int width = src.getWidth(); |
| int height = src.getHeight(); |
| if (dst == null || dst.getWidth() != width || dst.getHeight() != height || src.getType() != dst.getType()) { |
| dst = createColorModelCompatibleImage(src); |
| } |
| float[] kernel = createGaussianKernel(radius); |
| if (src.getType() == BufferedImage.TYPE_INT_ARGB) { |
| int[] srcPixels = new int[width * height]; |
| int[] dstPixels = new int[width * height]; |
| getPixels(src, 0, 0, width, height, srcPixels); |
| // horizontal pass |
| blur(srcPixels, dstPixels, width, height, kernel, radius); |
| // vertical pass |
| //noinspection SuspiciousNameCombination |
| blur(dstPixels, srcPixels, height, width, kernel, radius); |
| // the result is now stored in srcPixels due to the 2nd pass |
| setPixels(dst, 0, 0, width, height, srcPixels); |
| } else if (src.getType() == BufferedImage.TYPE_BYTE_GRAY) { |
| byte[] srcPixels = new byte[width * height]; |
| byte[] dstPixels = new byte[width * height]; |
| getPixels(src, 0, 0, width, height, srcPixels); |
| // horizontal pass |
| blur(srcPixels, dstPixels, width, height, kernel, radius); |
| // vertical pass |
| //noinspection SuspiciousNameCombination |
| blur(dstPixels, srcPixels, height, width, kernel, radius); |
| // the result is now stored in srcPixels due to the 2nd pass |
| setPixels(dst, 0, 0, width, height, srcPixels); |
| } else { |
| throw new IllegalArgumentException("EffectUtils.gaussianBlur() src image is not a supported type, type=[" + |
| src.getType() + "]"); |
| } |
| return dst; |
| } |
| |
| /** |
| * <p>Blurs the source pixels into the destination pixels. The force of the blur is specified by the radius which |
| * must be greater than 0.</p> <p>The source and destination pixels arrays are expected to be in the INT_ARGB |
| * format.</p> <p>After this method is executed, dstPixels contains a transposed and filtered copy of |
| * srcPixels.</p> |
| * |
| * @param srcPixels the source pixels |
| * @param dstPixels the destination pixels |
| * @param width the width of the source picture |
| * @param height the height of the source picture |
| * @param kernel the kernel of the blur effect |
| * @param radius the radius of the blur effect |
| */ |
| private static void blur(int[] srcPixels, int[] dstPixels, |
| int width, int height, |
| float[] kernel, int radius) { |
| float a; |
| float r; |
| float g; |
| float b; |
| |
| int ca; |
| int cr; |
| int cg; |
| int cb; |
| |
| for (int y = 0; y < height; y++) { |
| int index = y; |
| int offset = y * width; |
| |
| for (int x = 0; x < width; x++) { |
| a = r = g = b = 0.0f; |
| |
| for (int i = -radius; i <= radius; i++) { |
| int subOffset = x + i; |
| if (subOffset < 0 || subOffset >= width) { |
| subOffset = (x + width) % width; |
| } |
| |
| int pixel = srcPixels[offset + subOffset]; |
| float blurFactor = kernel[radius + i]; |
| |
| a += blurFactor * ((pixel >> 24) & 0xFF); |
| r += blurFactor * ((pixel >> 16) & 0xFF); |
| g += blurFactor * ((pixel >> 8) & 0xFF); |
| b += blurFactor * ((pixel) & 0xFF); |
| } |
| |
| ca = (int) (a + 0.5f); |
| cr = (int) (r + 0.5f); |
| cg = (int) (g + 0.5f); |
| cb = (int) (b + 0.5f); |
| |
| dstPixels[index] = ((ca > 255 ? 255 : ca) << 24) | |
| ((cr > 255 ? 255 : cr) << 16) | |
| ((cg > 255 ? 255 : cg) << 8) | |
| (cb > 255 ? 255 : cb); |
| index += height; |
| } |
| } |
| } |
| |
| /** |
| * <p>Blurs the source pixels into the destination pixels. The force of the blur is specified by the radius which |
| * must be greater than 0.</p> <p>The source and destination pixels arrays are expected to be in the BYTE_GREY |
| * format.</p> <p>After this method is executed, dstPixels contains a transposed and filtered copy of |
| * srcPixels.</p> |
| * |
| * @param srcPixels the source pixels |
| * @param dstPixels the destination pixels |
| * @param width the width of the source picture |
| * @param height the height of the source picture |
| * @param kernel the kernel of the blur effect |
| * @param radius the radius of the blur effect |
| */ |
| static void blur(byte[] srcPixels, byte[] dstPixels, |
| int width, int height, |
| float[] kernel, int radius) { |
| float p; |
| int cp; |
| for (int y = 0; y < height; y++) { |
| int index = y; |
| int offset = y * width; |
| for (int x = 0; x < width; x++) { |
| p = 0.0f; |
| for (int i = -radius; i <= radius; i++) { |
| int subOffset = x + i; |
| // if (subOffset < 0) subOffset = 0; |
| // if (subOffset >= width) subOffset = width-1; |
| if (subOffset < 0 || subOffset >= width) { |
| subOffset = (x + width) % width; |
| } |
| int pixel = srcPixels[offset + subOffset] & 0xFF; |
| float blurFactor = kernel[radius + i]; |
| p += blurFactor * pixel; |
| } |
| cp = (int) (p + 0.5f); |
| dstPixels[index] = (byte) (cp > 255 ? 255 : cp); |
| index += height; |
| } |
| } |
| } |
| |
| static float[] createGaussianKernel(int radius) { |
| if (radius < 1) { |
| throw new IllegalArgumentException("Radius must be >= 1"); |
| } |
| |
| float[] data = new float[radius * 2 + 1]; |
| |
| float sigma = radius / 3.0f; |
| float twoSigmaSquare = 2.0f * sigma * sigma; |
| float sigmaRoot = (float) Math.sqrt(twoSigmaSquare * Math.PI); |
| float total = 0.0f; |
| |
| for (int i = -radius; i <= radius; i++) { |
| float distance = i * i; |
| int index = i + radius; |
| data[index] = (float) Math.exp(-distance / twoSigmaSquare) / sigmaRoot; |
| total += data[index]; |
| } |
| |
| for (int i = 0; i < data.length; i++) { |
| data[i] /= total; |
| } |
| |
| return data; |
| } |
| |
| // ================================================================================================================= |
| // Get/Set Pixels helper methods |
| |
| /** |
| * <p>Returns an array of pixels, stored as integers, from a <code>BufferedImage</code>. The pixels are grabbed from |
| * a rectangular area defined by a location and two dimensions. Calling this method on an image of type different |
| * from <code>BufferedImage.TYPE_INT_ARGB</code> and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the |
| * image.</p> |
| * |
| * @param img the source image |
| * @param x the x location at which to start grabbing pixels |
| * @param y the y location at which to start grabbing pixels |
| * @param w the width of the rectangle of pixels to grab |
| * @param h the height of the rectangle of pixels to grab |
| * @param pixels a pre-allocated array of pixels of size w*h; can be null |
| * @return <code>pixels</code> if non-null, a new array of integers otherwise |
| * @throws IllegalArgumentException is <code>pixels</code> is non-null and of length < w*h |
| */ |
| static byte[] getPixels(BufferedImage img, |
| int x, int y, int w, int h, byte[] pixels) { |
| if (w == 0 || h == 0) { |
| return new byte[0]; |
| } |
| |
| if (pixels == null) { |
| pixels = new byte[w * h]; |
| } else if (pixels.length < w * h) { |
| throw new IllegalArgumentException("pixels array must have a length >= w*h"); |
| } |
| |
| int imageType = img.getType(); |
| if (imageType == BufferedImage.TYPE_BYTE_GRAY) { |
| Raster raster = img.getRaster(); |
| return (byte[]) raster.getDataElements(x, y, w, h, pixels); |
| } else { |
| throw new IllegalArgumentException("Only type BYTE_GRAY is supported"); |
| } |
| } |
| |
| /** |
| * <p>Writes a rectangular area of pixels in the destination <code>BufferedImage</code>. Calling this method on an |
| * image of type different from <code>BufferedImage.TYPE_INT_ARGB</code> and <code>BufferedImage.TYPE_INT_RGB</code> |
| * will unmanage the image.</p> |
| * |
| * @param img the destination image |
| * @param x the x location at which to start storing pixels |
| * @param y the y location at which to start storing pixels |
| * @param w the width of the rectangle of pixels to store |
| * @param h the height of the rectangle of pixels to store |
| * @param pixels an array of pixels, stored as integers |
| * @throws IllegalArgumentException is <code>pixels</code> is non-null and of length < w*h |
| */ |
| static void setPixels(BufferedImage img, |
| int x, int y, int w, int h, byte[] pixels) { |
| if (pixels == null || w == 0 || h == 0) { |
| return; |
| } else if (pixels.length < w * h) { |
| throw new IllegalArgumentException("pixels array must have a length >= w*h"); |
| } |
| int imageType = img.getType(); |
| if (imageType == BufferedImage.TYPE_BYTE_GRAY) { |
| WritableRaster raster = img.getRaster(); |
| raster.setDataElements(x, y, w, h, pixels); |
| } else { |
| throw new IllegalArgumentException("Only type BYTE_GRAY is supported"); |
| } |
| } |
| |
| /** |
| * <p>Returns an array of pixels, stored as integers, from a |
| * <code>BufferedImage</code>. The pixels are grabbed from a rectangular |
| * area defined by a location and two dimensions. Calling this method on |
| * an image of type different from <code>BufferedImage.TYPE_INT_ARGB</code> |
| * and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.</p> |
| * |
| * @param img the source image |
| * @param x the x location at which to start grabbing pixels |
| * @param y the y location at which to start grabbing pixels |
| * @param w the width of the rectangle of pixels to grab |
| * @param h the height of the rectangle of pixels to grab |
| * @param pixels a pre-allocated array of pixels of size w*h; can be null |
| * @return <code>pixels</code> if non-null, a new array of integers |
| * otherwise |
| * @throws IllegalArgumentException is <code>pixels</code> is non-null and |
| * of length < w*h |
| */ |
| public static int[] getPixels(BufferedImage img, |
| int x, int y, int w, int h, int[] pixels) { |
| if (w == 0 || h == 0) { |
| return new int[0]; |
| } |
| |
| if (pixels == null) { |
| pixels = new int[w * h]; |
| } else if (pixels.length < w * h) { |
| throw new IllegalArgumentException("pixels array must have a length" + |
| " >= w*h"); |
| } |
| |
| int imageType = img.getType(); |
| if (imageType == BufferedImage.TYPE_INT_ARGB || |
| imageType == BufferedImage.TYPE_INT_RGB) { |
| Raster raster = img.getRaster(); |
| return (int[]) raster.getDataElements(x, y, w, h, pixels); |
| } |
| |
| // Unmanages the image |
| return img.getRGB(x, y, w, h, pixels, 0, w); |
| } |
| |
| /** |
| * <p>Writes a rectangular area of pixels in the destination |
| * <code>BufferedImage</code>. Calling this method on |
| * an image of type different from <code>BufferedImage.TYPE_INT_ARGB</code> |
| * and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.</p> |
| * |
| * @param img the destination image |
| * @param x the x location at which to start storing pixels |
| * @param y the y location at which to start storing pixels |
| * @param w the width of the rectangle of pixels to store |
| * @param h the height of the rectangle of pixels to store |
| * @param pixels an array of pixels, stored as integers |
| * @throws IllegalArgumentException is <code>pixels</code> is non-null and |
| * of length < w*h |
| */ |
| public static void setPixels(BufferedImage img, |
| int x, int y, int w, int h, int[] pixels) { |
| if (pixels == null || w == 0 || h == 0) { |
| return; |
| } else if (pixels.length < w * h) { |
| throw new IllegalArgumentException("pixels array must have a length" + |
| " >= w*h"); |
| } |
| |
| int imageType = img.getType(); |
| if (imageType == BufferedImage.TYPE_INT_ARGB || |
| imageType == BufferedImage.TYPE_INT_RGB) { |
| WritableRaster raster = img.getRaster(); |
| raster.setDataElements(x, y, w, h, pixels); |
| } else { |
| // Unmanages the image |
| img.setRGB(x, y, w, h, pixels, 0, w); |
| } |
| } |
| |
| /** |
| * <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 translucent compatible image of the specified width and |
| * height. That is, the returned <code>BufferedImage</code> is compatible with |
| * the graphics hardware. If the method is called in a headless |
| * environment, then the returned BufferedImage will be compatible with |
| * the source image.</p> |
| * |
| * @param width the width of the new image |
| * @param height the height of the new image |
| * @return a new translucent compatible <code>BufferedImage</code> of the |
| * specified width and height |
| */ |
| public static BufferedImage createCompatibleTranslucentImage(int width, |
| int height) { |
| return isHeadless() ? |
| new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB) : |
| getGraphicsConfiguration().createCompatibleImage(width, height, |
| Transparency.TRANSLUCENT); |
| } |
| |
| private static boolean isHeadless() { |
| return GraphicsEnvironment.isHeadless(); |
| } |
| |
| // Returns the graphics configuration for the primary screen |
| private static GraphicsConfiguration getGraphicsConfiguration() { |
| return GraphicsEnvironment.getLocalGraphicsEnvironment(). |
| getDefaultScreenDevice().getDefaultConfiguration(); |
| } |
| |
| } |