/*
* 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
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*/
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;
}
}