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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/color/ICC_ColorSpace.java
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+/* ICC_ColorSpace.java -- the canonical color space implementation
+ Copyright (C) 2000, 2002, 2004 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.awt.color;
+
+import gnu.java.awt.color.CieXyzConverter;
+import gnu.java.awt.color.ClutProfileConverter;
+import gnu.java.awt.color.ColorSpaceConverter;
+import gnu.java.awt.color.GrayProfileConverter;
+import gnu.java.awt.color.GrayScaleConverter;
+import gnu.java.awt.color.LinearRGBConverter;
+import gnu.java.awt.color.PyccConverter;
+import gnu.java.awt.color.RgbProfileConverter;
+import gnu.java.awt.color.SrgbConverter;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+/**
+ * ICC_ColorSpace - an implementation of ColorSpace
+ *
+ * While an ICC_Profile class abstracts the data in an ICC profile file
+ * an ICC_ColorSpace performs the color space conversions defined by
+ * an ICC_Profile instance.
+ *
+ * Typically, an ICC_Profile will either be created using getInstance,
+ * either from the built-in colorspaces, or from an ICC profile file.
+ * Then a ICC_Colorspace will be used to perform transforms from the
+ * device colorspace to and from the profile color space.
+ *
+ * The PCS used by ColorSpace is CIE XYZ relative a D50 white point.
+ * (Profiles using a CIE Lab PCS will have their input and output converted
+ * to D50 CIE XYZ accordingly.
+ *
+ * Note that a valid profile may not contain transforms in both directions,
+ * in which case the output may be undefined.
+ * All built-in colorspaces have bidirectional transforms, but developers
+ * using an ICC profile file may want to check the profile class using
+ * the ICC_Profile.getProfileClass() method. Input class profiles are
+ * guaranteed to have transforms to the PCS, output class profiles are
+ * guaranteed to have transforms from the PCS to device space.
+ *
+ * @author Sven de Marothy
+ * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
+ * @since 1.2
+ */
+public class ICC_ColorSpace extends ColorSpace
+{
+ /**
+ * Compatible with JDK 1.2+.
+ */
+ private static final long serialVersionUID = 3455889114070431483L;
+
+ /**
+ * @serial
+ */
+ private ICC_Profile thisProfile;
+
+ /**
+ * @serial
+ */
+ private float[] minVal;
+
+ /**
+ * @serial
+ */
+ private float[] maxVal;
+
+ /**
+ * @serial
+ */
+ private float[] diffMinMax;
+
+ /**
+ * @serial
+ */
+ private float[] invDiffMinMax;
+
+ /**
+ * @serial
+ */
+ private boolean needScaleInit;
+
+ /**
+ * Tells us if the PCS is CIE LAB (must be CIEXYZ otherwise)
+ */
+ private transient int type;
+ private transient int nComponents;
+ private transient ColorSpaceConverter converter;
+
+ /**
+ * Constructs a new ICC_ColorSpace from an ICC_Profile object.
+ *
+ * @exception IllegalArgumentException If profile is inappropriate for
+ * representing a ColorSpace.
+ */
+ public ICC_ColorSpace(ICC_Profile profile)
+ {
+ super(profile.getColorSpaceType(), profile.getNumComponents());
+
+ converter = getConverter(profile);
+ thisProfile = profile;
+ nComponents = profile.getNumComponents();
+ type = profile.getColorSpaceType();
+ makeArrays();
+ }
+
+ /**
+ * Return the profile
+ */
+ public ICC_Profile getProfile()
+ {
+ return thisProfile;
+ }
+
+ /**
+ * Transforms a color value assumed to be in this ColorSpace into a value in
+ * the default CS_sRGB color space.
+ *
+ * @exception ArrayIndexOutOfBoundsException If array length is not at least
+ * the number of components in this ColorSpace.
+ */
+ public float[] toRGB(float[] colorvalue)
+ {
+ return converter.toRGB(colorvalue);
+ }
+
+ /**
+ * Transforms a color value assumed to be in the default CS_sRGB color space
+ * into this ColorSpace.
+ *
+ * @exception ArrayIndexOutOfBoundsException If array length is not at
+ * least 3.
+ */
+ public float[] fromRGB(float[] rgbvalue)
+ {
+ return converter.fromRGB(rgbvalue);
+ }
+
+ /**
+ * Transforms a color value assumed to be in this ColorSpace into the
+ * CS_CIEXYZ conversion color space.
+ *
+ * @exception ArrayIndexOutOfBoundsException If array length is not at
+ * least the number of components in this ColorSpace.
+ */
+ public float[] toCIEXYZ(float[] colorvalue)
+ {
+ return converter.toCIEXYZ(colorvalue);
+ }
+
+ /**
+ * Transforms a color value assumed to be in the CS_CIEXYZ conversion color
+ * space into this ColorSpace.
+ *
+ * @exception ArrayIndexOutOfBoundsException If array length is not at
+ * least 3.
+ */
+ public float[] fromCIEXYZ(float[] colorvalue)
+ {
+ return converter.fromCIEXYZ(colorvalue);
+ }
+
+ public boolean isCS_sRGB()
+ {
+ return converter instanceof SrgbConverter;
+ }
+
+ /**
+ * Returns the minimum normalized color component value for the specified
+ * component.
+ *
+ * @exception IllegalArgumentException If component is less than 0 or greater
+ * than numComponents - 1.
+ *
+ * @since 1.4
+ */
+ public float getMinValue(int idx)
+ {
+ // FIXME: Not 100% certain of this.
+ if (type == ColorSpace.TYPE_Lab && (idx == 1 || idx == 2))
+ return -128f;
+
+ if (idx < 0 || idx >= nComponents)
+ throw new IllegalArgumentException();
+ return 0;
+ }
+
+ /**
+ * Returns the maximum normalized color component value for the specified
+ * component.
+ *
+ * @exception IllegalArgumentException If component is less than 0 or greater
+ * than numComponents - 1.
+ *
+ * @since 1.4
+ */
+ public float getMaxValue(int idx)
+ {
+ if (type == ColorSpace.TYPE_XYZ && idx >= 0 && idx <= 2)
+ return 1 + 32767 / 32768f;
+ else if (type == ColorSpace.TYPE_Lab)
+ {
+ if (idx == 0)
+ return 100;
+ if (idx == 1 || idx == 2)
+ return 127;
+ }
+ if (idx < 0 || idx >= nComponents)
+ throw new IllegalArgumentException();
+ return 1;
+ }
+
+ /**
+ * Returns a colorspace converter suitable for a given profile
+ */
+ private ColorSpaceConverter getConverter(ICC_Profile profile)
+ {
+ ColorSpaceConverter converter;
+ switch (profile.isPredefined())
+ {
+ case CS_sRGB:
+ converter = new SrgbConverter();
+ break;
+ case CS_CIEXYZ:
+ converter = new CieXyzConverter();
+ break;
+ case CS_GRAY:
+ converter = new GrayScaleConverter();
+ break;
+ case CS_LINEAR_RGB:
+ converter = new LinearRGBConverter();
+ break;
+ case CS_PYCC:
+ converter = new PyccConverter();
+ break;
+ default:
+ if (profile instanceof ICC_ProfileRGB)
+ converter = new RgbProfileConverter((ICC_ProfileRGB) profile);
+ else if (profile instanceof ICC_ProfileGray)
+ converter = new GrayProfileConverter((ICC_ProfileGray) profile);
+ else
+ converter = new ClutProfileConverter(profile);
+ break;
+ }
+ return converter;
+ }
+
+ /**
+ * Serialization compatibility requires these variable to be set,
+ * although we don't use them. Perhaps we should?
+ */
+ private void makeArrays()
+ {
+ minVal = new float[nComponents];
+ maxVal = new float[nComponents];
+
+ invDiffMinMax = diffMinMax = null;
+ for (int i = 0; i < nComponents; i++)
+ {
+ minVal[i] = getMinValue(i);
+ maxVal[i] = getMaxValue(i);
+ }
+ needScaleInit = true;
+ }
+
+ /**
+ * Deserializes the object
+ */
+ private void readObject(ObjectInputStream s)
+ throws IOException, ClassNotFoundException
+ {
+ s.defaultReadObject();
+ // set up objects
+ converter = getConverter(thisProfile);
+ nComponents = thisProfile.getNumComponents();
+ type = thisProfile.getColorSpaceType();
+ }
+} // class ICC_ColorSpace