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/* ClutProfileConverter.java -- Conversion routines for CLUT-Based profiles
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Copyright (C) 2004 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt.color;
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import java.awt.color.ICC_Profile;
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* ClutProfileConverter - conversions through a CLUT-based profile
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* @author Sven de Marothy
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public class ClutProfileConverter implements ColorSpaceConverter
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private ColorLookUpTable toPCS;
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private ColorLookUpTable fromPCS;
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private int nChannels;
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public ClutProfileConverter(ICC_Profile profile)
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nChannels = profile.getNumComponents();
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// Sun does not specifiy which rendering intent should be used,
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// neither does the ICC v2 spec really.
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toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB0Tag);
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fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA0Tag);
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if (toPCS != null || fromPCS != null)
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// If no intent 0 clut is available, look for a intent 1 clut.
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toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB1Tag);
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fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA1Tag);
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if (toPCS != null || fromPCS != null)
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// Last shot.. intent 2 CLUT.
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toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB2Tag);
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fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA2Tag);
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if (toPCS == null && fromPCS == null)
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throw new IllegalArgumentException("No CLUTs in profile!");
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public float[] toCIEXYZ(float[] in)
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return toPCS.lookup(in);
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public float[] toRGB(float[] in)
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return SrgbConverter.XYZtoRGB(toCIEXYZ(in));
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public float[] fromCIEXYZ(float[] in)
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return fromPCS.lookup(in);
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return new float[nChannels];
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public float[] fromRGB(float[] in)
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return fromCIEXYZ(SrgbConverter.RGBtoXYZ(in));