http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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.
 */

/* $Id$ */

package org.apache.fop.util;

import java.awt.color.ColorSpace;

import org.apache.fop.util.OCAColor.OCAColorValue;


The OCA color space is a subset of RGB that includes a limited set of colors.
The color value is specified with one unsigned binary component that
specifies a named color using a two-byte value from the Standard
OCA Color Value table.

/**
 * The OCA color space is a subset of RGB that includes a limited set of colors.
 * The color value is specified with one unsigned binary component that
 * specifies a named color using a two-byte value from the Standard
 * OCA Color Value table.
 *
 */
public class OCAColorSpace extends ColorSpace {

    private static final long serialVersionUID = 1L;

    protected OCAColorSpace() {
        super(ColorSpace.TYPE_RGB, 1);
    }

    public float[] fromCIEXYZ(float[] colorvalue) {
        throw new UnsupportedOperationException("Color conversion from CIE XYZ to OCA is not possible");
    }

    public float[] fromRGB(float[] rgbvalue) {
        throw new UnsupportedOperationException("Color conversion from RGB to OCA is not possible");
    }

    public float[] toCIEXYZ(float[] colorvalue) {
        float[] rgb = toRGB(colorvalue);
        ColorSpace sRGB = ColorSpace.getInstance(ColorSpace.CS_sRGB);
        return sRGB.toCIEXYZ(rgb);
    }

    public float[] toRGB(float[] colorvalue) {
        int oca = (int) colorvalue[0];
        if (oca == OCAColorValue.BLACK.value) {
            return new float[]{0, 0, 0};
        } else if (oca == OCAColorValue.BLUE.value) {
            return new float[]{0, 0, 1.0f};
        } else if (oca == OCAColorValue.BROWN.value) {
            return new float[]{0.565f, 0.188f, 0};
        } else if (oca == OCAColorValue.CYAN.value) {
            return new float[]{0, 1.0f, 1.0f};
        } else if (oca == OCAColorValue.GREEN.value) {
            return new float[]{0, 1.0f, 0};
        } else if (oca == OCAColorValue.MAGENTA.value) {
            return new float[]{1.0f, 0, 1.0f};
        } else if (oca == OCAColorValue.RED.value) {
            return new float[]{1.0f, 0, 0};
        } else if (oca == OCAColorValue.YELLOW.value) {
            return new float[]{1.0f, 1.0f, 0};
        }
        return null;
    }

}