1 /* ClutProfileConverter.java -- Conversion routines for CLUT-Based profiles
2 Copyright (C) 2004 Free Software Foundation
4 This file is part of GNU Classpath.
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21 Linking this library statically or dynamically with other modules is
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39 package gnu.java.awt.color;
41 import java.awt.color.ICC_Profile;
45 * ClutProfileConverter - conversions through a CLUT-based profile
47 * @author Sven de Marothy
49 public class ClutProfileConverter implements ColorSpaceConverter
51 private ColorLookUpTable toPCS;
52 private ColorLookUpTable fromPCS;
53 private int nChannels;
55 public ClutProfileConverter(ICC_Profile profile)
57 nChannels = profile.getNumComponents();
59 // Sun does not specifiy which rendering intent should be used,
60 // neither does the ICC v2 spec really.
64 toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB0Tag);
73 fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA0Tag);
80 if (toPCS != null || fromPCS != null)
83 // If no intent 0 clut is available, look for a intent 1 clut.
86 toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB1Tag);
95 fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA1Tag);
102 if (toPCS != null || fromPCS != null)
105 // Last shot.. intent 2 CLUT.
108 toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB2Tag);
117 fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA2Tag);
124 if (toPCS == null && fromPCS == null)
125 throw new IllegalArgumentException("No CLUTs in profile!");
128 public float[] toCIEXYZ(float[] in)
131 return toPCS.lookup(in);
136 public float[] toRGB(float[] in)
138 return SrgbConverter.XYZtoRGB(toCIEXYZ(in));
141 public float[] fromCIEXYZ(float[] in)
144 return fromPCS.lookup(in);
146 return new float[nChannels];
149 public float[] fromRGB(float[] in)
151 return fromCIEXYZ(SrgbConverter.RGBtoXYZ(in));