mirror of
https://github.com/haraldk/TwelveMonkeys.git
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Harald Kuhr
288 lines
10 KiB
Java
Executable File
288 lines
10 KiB
Java
Executable File
/*
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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.*;
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import java.awt.geom.Point2D;
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import java.awt.geom.Rectangle2D;
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import java.awt.image.BufferedImage;
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import java.awt.image.BufferedImageOp;
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import java.awt.image.ColorModel;
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import java.awt.image.IndexColorModel;
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import java.awt.image.Raster;
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import java.awt.image.RasterOp;
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import java.awt.image.WritableRaster;
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/**
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* This BufferedImageOp simply copies pixels, converting to a
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* {@code IndexColorModel}.
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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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*
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* @version $Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/image/CopyDither.java#1 $
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*
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*/
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public class CopyDither implements BufferedImageOp, RasterOp {
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protected IndexColorModel indexColorModel = null;
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/**
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* Creates a {@code CopyDither}, using the given
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* {@code IndexColorModel} for dithering into.
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*
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* @param pICM an IndexColorModel.
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*/
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public CopyDither(IndexColorModel pICM) {
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// Store colormodel
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indexColorModel = pICM;
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}
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/**
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* Creates a {@code CopyDither}, with no fixed
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* {@code IndexColorModel}. The colormodel will be generated for each
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* filtering, unless the dest image allready has an
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* {@code IndexColorModel}.
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*/
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public CopyDither() {
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}
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/**
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* Creates a compatible {@code BufferedImage} to dither into.
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* Only {@code IndexColorModel} allowed.
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*
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* @return a compatible {@code BufferedImage}
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*
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* @throws ImageFilterException if {@code pDestCM} is not {@code null} or
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* an instance of {@code IndexColorModel}.
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*/
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public final BufferedImage createCompatibleDestImage(BufferedImage pSource, ColorModel pDestCM) {
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if (pDestCM == null) {
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return new BufferedImage(pSource.getWidth(), pSource.getHeight(), BufferedImage.TYPE_BYTE_INDEXED, indexColorModel);
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}
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else if (pDestCM instanceof IndexColorModel) {
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return new BufferedImage(pSource.getWidth(), pSource.getHeight(), BufferedImage.TYPE_BYTE_INDEXED, (IndexColorModel) pDestCM);
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}
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else {
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throw new ImageFilterException("Only IndexColorModel allowed.");
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}
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}
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/**
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* Creates a compatible {@code Raster} to dither into.
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* Only {@code IndexColorModel} allowed.
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*
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* @param pSrc
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*
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* @return a {@code WritableRaster}
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*/
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public final WritableRaster createCompatibleDestRaster(Raster pSrc) {
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return createCompatibleDestRaster(pSrc, getICM(pSrc));
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}
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public final WritableRaster createCompatibleDestRaster(Raster pSrc, IndexColorModel pIndexColorModel) {
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return pIndexColorModel.createCompatibleWritableRaster(pSrc.getWidth(), pSrc.getHeight());
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}
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/**
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* Returns the bounding box of the filtered destination image. Since
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* this is not a geometric operation, the bounding box does not
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* change.
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* @param pSrc the {@code BufferedImage} to be filtered
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* @return the bounds of the filtered definition image.
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*/
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public final Rectangle2D getBounds2D(BufferedImage pSrc) {
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return getBounds2D(pSrc.getRaster());
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}
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/**
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* Returns the bounding box of the filtered destination Raster. Since
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* this is not a geometric operation, the bounding box does not
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* change.
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* @param pSrc the {@code Raster} to be filtered
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* @return the bounds of the filtered definition {@code Raster}.
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*/
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public final Rectangle2D getBounds2D(Raster pSrc) {
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return pSrc.getBounds();
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}
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/**
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* Returns the location of the destination point given a
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* point in the source. If {@code dstPt} is not
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* {@code null}, it will be used to hold the return value.
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* Since this is not a geometric operation, the {@code srcPt}
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* will equal the {@code dstPt}.
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* @param pSrcPt a {@code Point2D} that represents a point
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* in the source image
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* @param pDstPt a {@code Point2D}that represents the location
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* in the destination
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* @return the {@code Point2D} in the destination that
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* corresponds to the specified point in the source.
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*/
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public final Point2D getPoint2D(Point2D pSrcPt, Point2D pDstPt) {
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// Create new Point, if needed
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if (pDstPt == null) {
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pDstPt = new Point2D.Float();
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}
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// Copy location
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pDstPt.setLocation(pSrcPt.getX(), pSrcPt.getY());
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// Return dest
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return pDstPt;
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}
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/**
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* Returns the rendering mHints for this op.
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* @return the {@code RenderingHints} object associated
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* with this op.
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*/
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public final RenderingHints getRenderingHints() {
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return null;
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}
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/**
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* Converts a int triplet to int ARGB.
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*/
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private static int toIntARGB(int[] pRGB) {
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return 0xff000000 // All opaque
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| (pRGB[0] << 16)
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| (pRGB[1] << 8)
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| (pRGB[2]);
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/*
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| ((int) (pRGB[0] << 16) & 0x00ff0000)
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| ((int) (pRGB[1] << 8) & 0x0000ff00)
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| ((int) (pRGB[2] ) & 0x000000ff);
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*/
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}
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/**
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* Performs a single-input/single-output dither operation, applying basic
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* Floyd-Steinberg error-diffusion to the image.
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*
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* @param pSource the source image
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* @param pDest the destiantion image
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*
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* @return the destination image, or a new image, if {@code pDest} was
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* {@code null}.
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*/
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public final BufferedImage filter(BufferedImage pSource, BufferedImage pDest) {
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// Create destination image, if none provided
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if (pDest == null) {
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pDest = createCompatibleDestImage(pSource, getICM(pSource));
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}
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else if (!(pDest.getColorModel() instanceof IndexColorModel)) {
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throw new ImageFilterException("Only IndexColorModel allowed.");
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}
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// Filter rasters
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filter(pSource.getRaster(), pDest.getRaster(), (IndexColorModel) pDest.getColorModel());
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return pDest;
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}
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/**
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* Performs a single-input/single-output dither operation, applying basic
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* Floyd-Steinberg error-diffusion to the image.
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*
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* @param pSource
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* @param pDest
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*
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* @return the destination raster, or a new raster, if {@code pDest} was
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* {@code null}.
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*/
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public final WritableRaster filter(final Raster pSource, WritableRaster pDest) {
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return filter(pSource, pDest, getICM(pSource));
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}
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private IndexColorModel getICM(BufferedImage pSource) {
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return (indexColorModel != null ? indexColorModel : IndexImage.getIndexColorModel(pSource, 256, IndexImage.TRANSPARENCY_BITMASK | IndexImage.COLOR_SELECTION_QUALITY));
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}
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private IndexColorModel getICM(Raster pSource) {
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return (indexColorModel != null ? indexColorModel : createIndexColorModel(pSource));
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}
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private IndexColorModel createIndexColorModel(Raster pSource) {
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BufferedImage image = new BufferedImage(pSource.getWidth(), pSource.getHeight(), BufferedImage.TYPE_INT_ARGB);
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image.setData(pSource);
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return IndexImage.getIndexColorModel(image, 256, IndexImage.TRANSPARENCY_BITMASK | IndexImage.COLOR_SELECTION_QUALITY);
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}
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/**
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* Performs a single-input/single-output pixel copy operation.
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*
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* @param pSource
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* @param pDest
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* @param pColorModel
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*
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* @return the destination raster, or a new raster, if {@code pDest} was
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* {@code null}.
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*/
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public final WritableRaster filter(final Raster pSource, WritableRaster pDest, IndexColorModel pColorModel) {
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int width = pSource.getWidth();
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int height = pSource.getHeight();
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if (pDest == null) {
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pDest = createCompatibleDestRaster(pSource, pColorModel);
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}
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// temp buffers
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final int[] inRGB = new int[4];
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Object pixel = null;
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// TODO: Use getPixels instead of getPixel for better performance?
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// Loop through image data
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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// Get rgb from original raster
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// DON'T KNOW IF THIS WILL WORK FOR ALL TYPES..?
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pSource.getPixel(x, y, inRGB);
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// Get pixel value...
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// It is VERY important that we are using an IndexColorModel that
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// support reverse color lookup for speed.
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pixel = pColorModel.getDataElements(toIntARGB(inRGB), pixel);
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// And set it
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pDest.setDataElements(x, y, pixel);
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}
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}
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return pDest;
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}
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}
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