# PDGamma.java

    /*
     * 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 org.apache.pdfbox.cos.COSArray;
    import org.apache.pdfbox.cos.COSBase;
    import org.apache.pdfbox.cos.COSFloat;
    import org.apache.pdfbox.cos.COSNumber;

    import org.apache.pdfbox.pdmodel.common.COSObjectable;

    /**
     * A gamma array, or collection of three floating point parameters used for color operations.
     *
     * @author Ben Litchfield
     */
    public final class PDGamma implements COSObjectable
    {
        private final COSArray values;

        /**
         * Creates a new gamma.
         * Defaults all values to 0, 0, 0.
         */
        public PDGamma()
        {
            values = new COSArray();
            values.add(new COSFloat(0.0f));
            values.add(new COSFloat(0.0f));
            values.add(new COSFloat(0.0f));
        }

        /**
         * Creates a new gamma from a COS array.
         * @param array the array containing the XYZ values
         */
        public PDGamma(COSArray array)
        {
            values = array;
        }

        /**
         * Convert this standard java object to a COS object.
         * @return the cos object that matches this Java object
         */
        @Override
        public COSBase getCOSObject()
        {
            return values;
        }

        /**
         * Convert this standard java object to a COS object.
         * @return the cos object that matches this Java object
         */
        public COSArray getCOSArray()
        {
            return values;
        }

        /**
         * Returns the r value of the tristimulus.
         * @return the R value.
         */
        public float getR()
        {
            return ((COSNumber)values.get(0)).floatValue();
        }

        /**
         * Sets the r value of the tristimulus.
         * @param r the r value for the tristimulus
         */
        public void setR(float r)
        {
            values.set(0, new COSFloat(r));
        }

        /**
         * Returns the g value of the tristimulus.
         * @return the g value
         */
        public float getG()
        {
            return ((COSNumber)values.get(1)).floatValue();
        }

        /**
         * Sets the g value of the tristimulus.
         * @param g the g value for the tristimulus
         */
        public void setG(float g)
        {
            values.set(1, new COSFloat(g));
        }

        /**
         * Returns the b value of the tristimulus.
         * @return the B value
         */
        public float getB()
        {
            return ((COSNumber)values.get(2)).floatValue();
        }

        /**
         * Sets the b value of the tristimulus.
         * @param b he b value for the tristimulus
         */
        public void setB(float b)
        {
            values.set(2, new COSFloat(b));
        }
    }