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Core now moved to common.
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Erlend Hamnaberg
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/*
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* Copyright (c) 2008, Harald Kuhr
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name "TwelveMonkeys" nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.twelvemonkeys.image;
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import java.awt.image.*;
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import java.awt.*;
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import java.awt.geom.Rectangle2D;
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import java.awt.geom.Point2D;
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/**
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* This class implements a convolution from the source
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* to the destination.
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*
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* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
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* @author last modified by $Author: haku $
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* @version $Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/image/ConvolveWithEdgeOp.java#1 $
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*
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* @see java.awt.image.ConvolveOp
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*/
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public class ConvolveWithEdgeOp implements BufferedImageOp, RasterOp {
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/**
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* Alias for {@link ConvolveOp#EDGE_ZERO_FILL}.
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* @see #EDGE_REFLECT
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*/
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public static final int EDGE_ZERO_FILL = ConvolveOp.EDGE_ZERO_FILL;
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/**
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* Alias for {@link ConvolveOp#EDGE_NO_OP}.
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* @see #EDGE_REFLECT
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*/
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public static final int EDGE_NO_OP = ConvolveOp.EDGE_NO_OP;
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/**
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* Adds a border to the image while convolving. The border will reflect the
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* edges of the original image. This is usually a good default.
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* Note that while this mode typically provides better quality than the
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* standard modes {@code EDGE_ZERO_FILL} and {@code EDGE_NO_OP}, it does so
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* at the expense of higher memory consumption and considerable more computation.
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*/
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public static final int EDGE_REFLECT = 2; // as JAI BORDER_REFLECT
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/**
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* Adds a border to the image while convolving. The border will wrap the
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* edges of the original image. This is usually the best choice for tiles.
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* Note that while this mode typically provides better quality than the
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* standard modes {@code EDGE_ZERO_FILL} and {@code EDGE_NO_OP}, it does so
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* at the expense of higher memory consumption and considerable more computation.
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* @see #EDGE_REFLECT
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*/
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public static final int EDGE_WRAP = 3; // as JAI BORDER_WRAP
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private final Kernel mKernel;
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private final int mEdgeCondition;
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private final ConvolveOp mConvolve;
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public ConvolveWithEdgeOp(final Kernel pKernel, final int pEdgeCondition, final RenderingHints pHints) {
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// Create convolution operation
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int edge;
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switch (pEdgeCondition) {
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case EDGE_REFLECT:
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case EDGE_WRAP:
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edge = ConvolveOp.EDGE_NO_OP;
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break;
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default:
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edge = pEdgeCondition;
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break;
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}
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mKernel = pKernel;
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mEdgeCondition = pEdgeCondition;
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mConvolve = new ConvolveOp(pKernel, edge, pHints);
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}
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public ConvolveWithEdgeOp(final Kernel pKernel) {
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this(pKernel, EDGE_ZERO_FILL, null);
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}
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public BufferedImage filter(BufferedImage pSource, BufferedImage pDestination) {
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if (pSource == null) {
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throw new NullPointerException("source image is null");
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}
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if (pSource == pDestination) {
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throw new IllegalArgumentException("source image cannot be the same as the destination image");
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}
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int borderX = mKernel.getWidth() / 2;
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int borderY = mKernel.getHeight() / 2;
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BufferedImage original = addBorder(pSource, borderX, borderY);
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// Workaround for what seems to be a Java2D bug:
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// ConvolveOp needs explicit destination image type for some "uncommon"
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// image types. However, TYPE_3BYTE_BGR is what javax.imageio.ImageIO
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// normally returns for color JPEGs... :-/
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BufferedImage destination = pDestination;
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if (original.getType() == BufferedImage.TYPE_3BYTE_BGR) {
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destination = ImageUtil.createBuffered(
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pSource.getWidth(), pSource.getHeight(),
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pSource.getType(), pSource.getColorModel().getTransparency(),
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null
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);
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}
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// Do the filtering (if destination is null, a new image will be created)
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destination = mConvolve.filter(original, destination);
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if (pSource != original) {
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// Remove the border
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destination = destination.getSubimage(borderX, borderY, pSource.getWidth(), pSource.getHeight());
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}
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return destination;
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}
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private BufferedImage addBorder(final BufferedImage pOriginal, final int pBorderX, final int pBorderY) {
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if ((mEdgeCondition & 2) == 0) {
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return pOriginal;
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}
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// TODO: Might be faster if we could clone raster and stretch it...
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int w = pOriginal.getWidth();
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int h = pOriginal.getHeight();
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ColorModel cm = pOriginal.getColorModel();
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WritableRaster raster = cm.createCompatibleWritableRaster(w + 2 * pBorderX, h + 2 * pBorderY);
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BufferedImage bordered = new BufferedImage(cm, raster, cm.isAlphaPremultiplied(), null);
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Graphics2D g = bordered.createGraphics();
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try {
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g.setComposite(AlphaComposite.Src);
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g.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_DISABLE);
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// Draw original in center
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g.drawImage(pOriginal, pBorderX, pBorderY, null);
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// TODO: I guess we need the top/left etc, if the corner pixels are covered by the kernel
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switch (mEdgeCondition) {
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case EDGE_REFLECT:
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// Top/left (empty)
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g.drawImage(pOriginal, pBorderX, 0, pBorderX + w, pBorderY, 0, 0, w, 1, null); // Top/center
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// Top/right (empty)
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g.drawImage(pOriginal, -w + pBorderX, pBorderY, pBorderX, h + pBorderY, 0, 0, 1, h, null); // Center/left
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// Center/center (already drawn)
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g.drawImage(pOriginal, w + pBorderX, pBorderY, 2 * pBorderX + w, h + pBorderY, w - 1, 0, w, h, null); // Center/right
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// Bottom/left (empty)
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g.drawImage(pOriginal, pBorderX, pBorderY + h, pBorderX + w, 2 * pBorderY + h, 0, h - 1, w, h, null); // Bottom/center
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// Bottom/right (empty)
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break;
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case EDGE_WRAP:
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g.drawImage(pOriginal, -w + pBorderX, -h + pBorderY, null); // Top/left
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g.drawImage(pOriginal, pBorderX, -h + pBorderY, null); // Top/center
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g.drawImage(pOriginal, w + pBorderX, -h + pBorderY, null); // Top/right
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g.drawImage(pOriginal, -w + pBorderX, pBorderY, null); // Center/left
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// Center/center (already drawn)
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g.drawImage(pOriginal, w + pBorderX, pBorderY, null); // Center/right
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g.drawImage(pOriginal, -w + pBorderX, h + pBorderY, null); // Bottom/left
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g.drawImage(pOriginal, pBorderX, h + pBorderY, null); // Bottom/center
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g.drawImage(pOriginal, w + pBorderX, h + pBorderY, null); // Bottom/right
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break;
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default:
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throw new IllegalArgumentException("Illegal edge operation " + mEdgeCondition);
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}
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}
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finally {
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g.dispose();
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}
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return bordered;
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}
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/**
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* Returns the edge condition.
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* @return the edge condition of this {@code ConvolveOp}.
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* @see #EDGE_NO_OP
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* @see #EDGE_ZERO_FILL
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* @see #EDGE_REFLECT
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* @see #EDGE_WRAP
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*/
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public int getEdgeCondition() {
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return mEdgeCondition;
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}
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public WritableRaster filter(final Raster pSource, final WritableRaster pDestination) {
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return mConvolve.filter(pSource, pDestination);
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}
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public BufferedImage createCompatibleDestImage(final BufferedImage pSource, final ColorModel pDesinationColorModel) {
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return mConvolve.createCompatibleDestImage(pSource, pDesinationColorModel);
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}
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public WritableRaster createCompatibleDestRaster(final Raster pSource) {
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return mConvolve.createCompatibleDestRaster(pSource);
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}
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public Rectangle2D getBounds2D(final BufferedImage pSource) {
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return mConvolve.getBounds2D(pSource);
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}
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public Rectangle2D getBounds2D(final Raster pSource) {
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return mConvolve.getBounds2D(pSource);
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}
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public Point2D getPoint2D(final Point2D pSourcePoint, final Point2D pDestinationPoint) {
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return mConvolve.getPoint2D(pSourcePoint, pDestinationPoint);
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}
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public RenderingHints getRenderingHints() {
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return mConvolve.getRenderingHints();
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}
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public Kernel getKernel() {
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return mConvolve.getKernel();
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}
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}
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