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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.pdmodel.graphics.color;
import java.awt.color.ColorSpace;
import org.apache.pdfbox.pdmodel.common.PDMatrix;
/**
* This class represents a CalRGB color space.
*
* In the first place this implementation is needed to support CalRGB.
* To keep it simple, the CalRGB colorspace is treated similar to a DeviceRGB colorspace.
* There is no conversion including the gamma, whitepoint, blackpoint or matrix values yet.
* This should be suitable for displaying and simple printings.
*
* @author Andreas Lehmkühler
* @version $Revision: 1.0 $
*/
public class ColorSpaceCalRGB extends ColorSpace
{
private PDGamma gamma = null;
private PDTristimulus whitepoint = null;
private PDTristimulus blackpoint = null;
private PDMatrix matrix = null;
/**
* ID for serialization.
*/
private static final long serialVersionUID = -6362864473145799405L;
/**
* Constructor.
*/
public ColorSpaceCalRGB()
{
super(ColorSpace.TYPE_3CLR,3);
}
/**
* Constructor.
* @param gammaValue Gamma
* @param whitept Whitepoint
* @param blackpt Blackpoint
* @param linearMatrix Matrix value
*/
public ColorSpaceCalRGB(PDGamma gammaValue, PDTristimulus whitept, PDTristimulus blackpt, PDMatrix linearMatrix)
{
this();
this.gamma = gammaValue;
this.whitepoint = whitept;
this.blackpoint = blackpt;
this.matrix = linearMatrix;
}
/**
* Converts colorvalues from RGB-colorspace to CIEXYZ-colorspace.
* @param rgbvalue RGB colorvalues to be converted.
* @return Returns converted colorvalues.
*/
private float[] fromRGBtoCIEXYZ(float[] rgbvalue)
{
ColorSpace colorspaceRGB = ColorSpace.getInstance(CS_sRGB);
return colorspaceRGB.toCIEXYZ(rgbvalue);
}
/**
* Converts colorvalues from CIEXYZ-colorspace to RGB-colorspace.
* @param rgbvalue CIEXYZ colorvalues to be converted.
* @return Returns converted colorvalues.
*/
private float[] fromCIEXYZtoRGB(float[] xyzvalue)
{
ColorSpace colorspaceXYZ = ColorSpace.getInstance(CS_CIEXYZ);
return colorspaceXYZ.toRGB(xyzvalue);
}
/**
* {@inheritDoc}
*/
public float[] fromCIEXYZ(float[] colorvalue)
{
if (colorvalue != null && colorvalue.length == 3)
{
// We have to convert from XYV to RGB
return fromCIEXYZtoRGB(colorvalue);
}
return null;
}
/**
* {@inheritDoc}
*/
public float[] fromRGB(float[] rgbvalue)
{
if (rgbvalue != null && rgbvalue.length == 3)
{
return rgbvalue;
}
return null;
}
/**
* {@inheritDoc}
*/
public float[] toCIEXYZ(float[] colorvalue)
{
if (colorvalue != null && colorvalue.length == 4)
{
// We have to convert from RGB to XYV
return fromRGBtoCIEXYZ(toRGB(colorvalue));
}
return null;
}
/**
* {@inheritDoc}
*/
public float[] toRGB(float[] colorvalue)
{
if (colorvalue != null && colorvalue.length == 3)
{
return colorvalue;
}
return null;
}
}