/*
 * #%L
 * BSD implementations of Bio-Formats readers and writers
 * %%
 * Copyright (C) 2005 - 2017 Open Microscopy Environment:
 *   - Board of Regents of the University of Wisconsin-Madison
 *   - Glencoe Software, Inc.
 *   - University of Dundee
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

package loci.formats.gui;

import java.awt.color.ColorSpace;

/**
 * ColorSpace for 2-channel images.
 *
 * @author Melissa Linkert melissa at glencoesoftware.com
 */
public class TwoChannelColorSpace extends ColorSpace {

  // -- Constants --

  public static final int CS_2C = -1;

  private static final int NUM_COMPONENTS = 2;

  // -- Constructor --

  protected TwoChannelColorSpace(int type, int components) {
    super(type, components);
  }

  // -- ColorSpace API methods --

  @Override
  public float[] fromCIEXYZ(float[] color) {
    ColorSpace rgb = ColorSpace.getInstance(ColorSpace.CS_sRGB);
    return rgb.fromCIEXYZ(toRGB(color));
  }

  @Override
  public float[] fromRGB(float[] rgb) {
    return new float[] {rgb[0], rgb[1]};
  }

  public static ColorSpace getInstance(int colorSpace) {
    if (colorSpace == CS_2C) {
      return new TwoChannelColorSpace(ColorSpace.TYPE_2CLR, NUM_COMPONENTS);
    }
    return ColorSpace.getInstance(colorSpace);
  }

  @Override
  public String getName(int idx) {
    return idx == 0 ? "Red" : "Green";
  }

  @Override
  public int getNumComponents() {
    return NUM_COMPONENTS;
  }

  @Override
  public int getType() {
    return ColorSpace.TYPE_2CLR;
  }

  @Override
  public boolean isCS_sRGB() { return false; }

  @Override
  public float[] toCIEXYZ(float[] color) {
    ColorSpace rgb = ColorSpace.getInstance(ColorSpace.CS_sRGB);
    return rgb.toCIEXYZ(toRGB(color));
  }

  @Override
  public float[] toRGB(float[] color) {
    return new float[] {color[0], color[1], 0};
  }

}
