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Added fast conversion from CMYK to RGB for non-ICC cases.
This commit is contained in:
Harald Kuhr
parent
38ab0d936a
commit
2d04b8d484
@ -0,0 +1,189 @@
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/*
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* Copyright (c) 2011, 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.imageio.plugins.jpeg;
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import com.twelvemonkeys.lang.Validate;
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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.*;
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/**
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* This class performs a pixel by pixel conversion of the source image, from CMYK to RGB.
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* <p/>
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* The conversion is fast, but performed without any color space conversion.
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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 $Author: haraldk$
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* @version $Id: FastCMYKToRGB.java,v 1.0 21.02.11 13.22 haraldk Exp$
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* @see ColorConvertOp
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*/
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class FastCMYKToRGB implements /*BufferedImageOp,*/ RasterOp {
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// TODO: Force dest alpha to match source alpha?
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public FastCMYKToRGB() {
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}
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/**
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* Converts the CMYK source raster to the destination RGB raster.
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*
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* @param src assumed to be 4 byte CMYK
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* @param dest raster, in either 3 byte BGR/BGR, 4 byte ABGR or int RGB/ARGB format, or {@code null}
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* @return {@code dest}, or a new {@link WritableRaster} if {@code dest} is {@code null}.
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* @throws IllegalArgumentException if {@code src} and {@code dest} refer to the same object
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*/
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public WritableRaster filter(Raster src, WritableRaster dest) {
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Validate.notNull(src, "src may not be null");
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// TODO: Why not allow same raster, if converting to 4 byte ABGR?
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Validate.isTrue(src != dest, "src and dest raster may not be same");
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Validate.isTrue(src.getTransferType() == DataBuffer.TYPE_BYTE, src, "only TYPE_BYTE rasters supported as src: %s");
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Validate.isTrue(src.getNumDataElements() >= 4, src.getNumDataElements(), "CMYK raster must have at least 4 data elements: %s");
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if (dest == null) {
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dest = createCompatibleDestRaster(src);
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}
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else {
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Validate.isTrue(
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dest.getTransferType() == DataBuffer.TYPE_BYTE && dest.getNumDataElements() >= 3 ||
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dest.getTransferType() == DataBuffer.TYPE_INT && dest.getNumDataElements() == 1,
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src,
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"only 3 or 4 byte TYPE_BYTE or 1 int TYPE_INT rasters supported as dest: %s"
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);
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}
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final int height = src.getHeight();
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final int width = src.getWidth();
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final byte[] in = new byte[src.getNumDataElements()]; // CMYK
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if (dest.getTransferType() == DataBuffer.TYPE_BYTE) {
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final byte[] out = new byte[dest.getNumDataElements()];
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if (out.length > 3) {
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out[3] = (byte) 0xFF;
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}
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for (int y = dest.getMinY(); y < height; y++) {
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for (int x = dest.getMinX(); x < width; x++) {
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src.getDataElements(x, y, in);
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convertCMYKToRGB(in, out);
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dest.setDataElements(x, y, out);
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}
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}
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}
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else if (dest.getTransferType() == DataBuffer.TYPE_INT) {
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final int[] out = new int[dest.getNumDataElements()];
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final byte[] temp = new byte[3]; // RGB
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// Special case for INT_BGR types, as bit offsets are not handled in setDataElements like for the byte raster case
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int[] bitOffsets;
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SampleModel sm = dest.getSampleModel();
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if (sm instanceof SinglePixelPackedSampleModel) {
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bitOffsets = ((SinglePixelPackedSampleModel) sm).getBitOffsets();
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}
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else {
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bitOffsets = new int[]{0, 8, 16};
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}
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final int alpha = bitOffsets.length > 3 ? 0xFF : 0x00;
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for (int y = dest.getMinY(); y < height; y++) {
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for (int x = dest.getMinX(); x < width; x++) {
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src.getDataElements(x, y, in);
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convertCMYKToRGB(in, temp);
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out[0] = alpha << 24 | (temp[0] & 0xFF) << bitOffsets[0] | (temp[1] & 0xFF) << bitOffsets[1] | (temp[2] & 0xFF) << bitOffsets[2];
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dest.setDataElements(x, y, out);
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}
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}
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}
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else {
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// This is already tested for
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throw new AssertionError();
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}
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return dest;
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}
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@SuppressWarnings({"PointlessArithmeticExpression"})
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private void convertCMYKToRGB(byte[] cmyk, byte[] rgb) {
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rgb[0] = (byte) (((255 - cmyk[0] & 0xFF) * (255 - cmyk[3] & 0xFF)) / 255);
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rgb[1] = (byte) (((255 - cmyk[1] & 0xFF) * (255 - cmyk[3] & 0xFF)) / 255);
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rgb[2] = (byte) (((255 - cmyk[2] & 0xFF) * (255 - cmyk[3] & 0xFF)) / 255);
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}
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public Rectangle2D getBounds2D(Raster src) {
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return src.getBounds();
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}
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public WritableRaster createCompatibleDestRaster(final Raster src) {
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return src.createChild(0, 0, src.getWidth(), src.getHeight(), 0, 0, new int[]{0, 1, 2}).createCompatibleWritableRaster();
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}
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/*
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public BufferedImage filter(BufferedImage src, BufferedImage dest) {
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Validate.notNull(src, "src may not be null");
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// Validate.isTrue(src != dest, "src and dest image may not be same");
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if (dest == null) {
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dest = createCompatibleDestImage(src, ColorModel.getRGBdefault());
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}
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filter(src.getRaster(), dest.getRaster());
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return dest;
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}
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public Rectangle2D getBounds2D(BufferedImage src) {
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return getBounds2D(src.getRaster());
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}
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public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel destCM) {
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// TODO: dest color model depends on bands...
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return destCM == null ?
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new BufferedImage(src.getWidth(), src.getHeight(), BufferedImage.TYPE_3BYTE_BGR) :
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new BufferedImage(destCM, destCM.createCompatibleWritableRaster(src.getWidth(), src.getHeight()), destCM.isAlphaPremultiplied(), null);
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}
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*/
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public Point2D getPoint2D(Point2D srcPt, Point2D dstPt) {
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if (dstPt == null) {
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dstPt = new Point2D.Double(srcPt.getX(), srcPt.getY());
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}
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else {
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dstPt.setLocation(srcPt);
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}
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return dstPt;
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}
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public RenderingHints getRenderingHints() {
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return null;
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}
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}
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@ -0,0 +1,235 @@
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/*
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* Copyright (c) 2011, 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
|
||||
* notice, this list of conditions and the following disclaimer.
|
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* * Redistributions in binary form must reproduce the above copyright
|
||||
* 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
|
||||
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* 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.imageio.plugins.jpeg;
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import org.junit.Test;
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import java.awt.image.BufferedImage;
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import java.awt.image.DataBuffer;
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import java.awt.image.Raster;
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import java.awt.image.WritableRaster;
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import java.util.Arrays;
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import static org.junit.Assert.*;
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/**
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* FastCMYKToRGBTest
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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 $Author: haraldk$
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* @version $Id: FastCMYKToRGBTest.java,v 1.0 22.02.11 16.22 haraldk Exp$
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*/
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public class FastCMYKToRGBTest {
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@Test
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public void testCreate() {
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new FastCMYKToRGB();
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}
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@Test
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public void testConvertByteRGBWhite() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = convert.filter(input, null);
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byte[] pixel = (byte[]) result.getDataElements(0, 0, null);
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assertNotNull(pixel);
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assertEquals(3, pixel.length);
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byte[] expected = {(byte) 255, (byte) 255, (byte) 255};
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assertTrue(String.format("Was: %s, expected: %s", Arrays.toString(pixel), Arrays.toString(expected)), Arrays.equals(expected, pixel));
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}
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@Test
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public void testConvertIntRGBWhite() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = convert.filter(input, new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB).getRaster());
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int[] pixel = (int[]) result.getDataElements(0, 0, null);
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assertNotNull(pixel);
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assertEquals(1, pixel.length);
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int expected = 0xFFFFFF;
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int rgb = pixel[0] & 0xFFFFFF;
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assertEquals(String.format("Was: 0x%08x, expected: 0x%08x", rgb, expected), expected, rgb);
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}
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@Test
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public void testConvertByteRGBBlack() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = null;
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byte[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (127 + i), (byte) 255});
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result = convert.filter(input, result);
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pixel = (byte[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(3, pixel.length);
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byte[] expected = {(byte) 0, (byte) 0, (byte) 0};
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assertTrue(String.format("Was: %s, expected: %s", Arrays.toString(pixel), Arrays.toString(expected)), Arrays.equals(expected, pixel));
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}
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}
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@Test
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public void testConvertIntRGBBlack() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB).getRaster();
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int[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (127 + i), (byte) 255});
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result = convert.filter(input, result);
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pixel = (int[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(1, pixel.length);
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int expected = 0x0;
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int rgb = pixel[0] & 0xFFFFFF;
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assertEquals(String.format("Was: 0x%08x, expected: 0x%08x", rgb, expected), expected, rgb);
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}
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}
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@Test
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public void testConvertByteRGBColors() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = null;
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byte[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (128 + i), 0});
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result = convert.filter(input, result);
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pixel = (byte[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(3, pixel.length);
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byte[] expected = {(byte) (255 - i), (byte) i, (byte) (127 - i)};
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assertTrue(String.format("Was: %s, expected: %s", Arrays.toString(pixel), Arrays.toString(expected)), Arrays.equals(expected, pixel));
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}
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}
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@Test
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public void testConvertByteBGRColors() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = null;
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byte[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (128 + i), 0});
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result = convert.filter(input, result);
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pixel = (byte[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(3, pixel.length);
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byte[] expected = {(byte) (255 - i), (byte) i, (byte) (127 - i)};
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assertTrue(String.format("Was: %s, expected: %s", Arrays.toString(pixel), Arrays.toString(expected)), Arrays.equals(expected, pixel));
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}
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}
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@Test
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public void testConvertByteABGRColors() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR).getRaster();
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byte[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (128 + i), 0});
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result = convert.filter(input, result);
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pixel = (byte[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(4, pixel.length);
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byte[] expected = {(byte) (255 - i), (byte) i, (byte) (127 - i), (byte) 0xff};
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assertTrue(String.format("Was: %s, expected: %s", Arrays.toString(pixel), Arrays.toString(expected)), Arrays.equals(expected, pixel));
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}
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}
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@Test
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public void testConvertIntRGBColors() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB).getRaster();
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int[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (128 + i), 0});
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result = convert.filter(input, result);
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pixel = (int[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(1, pixel.length);
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int expected = (((byte) (255 - i)) & 0xFF) << 16 | (((byte) i) & 0xFF) << 8 | ((byte) (127 - i)) & 0xFF;
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int rgb = pixel[0] & 0xFFFFFF;
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assertEquals(String.format("Was: 0x%08x, expected: 0x%08x", rgb, expected), expected, rgb);
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}
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}
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@Test
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public void testConvertIntBGRColors() {
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FastCMYKToRGB convert = new FastCMYKToRGB();
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WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
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WritableRaster result = new BufferedImage(1, 1, BufferedImage.TYPE_INT_BGR).getRaster();
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int[] pixel = null;
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for (int i = 0; i < 255; i++) {
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input.setDataElements(0, 0, new byte[] {(byte) i, (byte) (255 - i), (byte) (128 + i), 0});
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result = convert.filter(input, result);
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pixel = (int[]) result.getDataElements(0, 0, pixel);
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assertNotNull(pixel);
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assertEquals(1, pixel.length);
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int expected = (((byte) (127 - i)) & 0xFF) << 16 | (((byte) i) & 0xFF) << 8 | ((byte) (255 - i)) & 0xFF;
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int rgb = pixel[0] & 0xFFFFFF;
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assertEquals(String.format("Was: 0x%08x, expected: 0x%08x", rgb, expected), expected, rgb);
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}
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}
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@Test
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public void testConvertIntARGBColors() {
|
||||
FastCMYKToRGB convert = new FastCMYKToRGB();
|
||||
|
||||
WritableRaster input = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, 1, 1, 4, null);
|
||||
WritableRaster result = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB).getRaster();
|
||||
int[] pixel = null;
|
||||
for (int i = 0; i < 255; i++) {
|
||||
input.setDataElements(0, 0, new byte[]{(byte) i, (byte) (255 - i), (byte) (128 + i), 0});
|
||||
result = convert.filter(input, result);
|
||||
pixel = (int[]) result.getDataElements(0, 0, pixel);
|
||||
|
||||
assertNotNull(pixel);
|
||||
assertEquals(1, pixel.length);
|
||||
int expected = 0xFF << 24 | (((byte) (255 - i)) & 0xFF) << 16 | (((byte) i) & 0xFF) << 8 | ((byte) (127 - i)) & 0xFF;
|
||||
assertEquals(String.format("Was: 0x%08x, expected: 0x%08x", pixel[0], expected), expected, pixel[0]);
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user