/*

 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing.colorchooser;

final class ColorModelCMYK extends ColorModel {

    ColorModelCMYK() {

        super("cmyk", "Cyan", "Magenta", "Yellow", "Black", "Alpha"); // NON-NLS: components

    }

    @Override

    void setColor(int color, float[] space) {

        super.setColor(color, space);

        space[4] = space[3];

        RGBtoCMYK(space, space);

    }

    @Override

    int getColor(float[] space) {

        CMYKtoRGB(space, space);

        space[3] = space[4];

        return super.getColor(space);

    }

    /**

     * Converts CMYK components of a color to a set of RGB components.

     *

     * @param cmyk  a float array with length equal to

     *              the number of CMYK components

     * @param rgb   a float array with length of at least 3

     *              that contains RGB components of a color

     * @return a float array that contains RGB components

     */

    private static float[] CMYKtoRGB(float[] cmyk, float[] rgb) {

        if (rgb == null) {

            rgb = new float[3];

        }

        rgb[0] = 1.0f + cmyk[0] * cmyk[3] - cmyk[3] - cmyk[0];

        rgb[1] = 1.0f + cmyk[1] * cmyk[3] - cmyk[3] - cmyk[1];

        rgb[2] = 1.0f + cmyk[2] * cmyk[3] - cmyk[3] - cmyk[2];

        return rgb;

    }

    /**

     * Converts RGB components of a color to a set of CMYK components.

     *

     * @param rgb   a float array with length of at least 3

     *              that contains RGB components of a color

     * @param cmyk  a float array with length equal to

     *              the number of CMYK components

     * @return a float array that contains CMYK components

     */

    private static float[] RGBtoCMYK(float[] rgb, float[] cmyk) {

        if (cmyk == null) {

            cmyk = new float[4];

        }

        float max = ColorModelHSL.max(rgb[0], rgb[1], rgb[2]);

        if (max > 0.0f) {

            cmyk[0] = 1.0f - rgb[0] / max;

            cmyk[1] = 1.0f - rgb[1] / max;

            cmyk[2] = 1.0f - rgb[2] / max;

        }

        else {

            cmyk[0] = 0.0f;

            cmyk[1] = 0.0f;

            cmyk[2] = 0.0f;

        }

        cmyk[3] = 1.0f - max;

        return cmyk;

    }

}