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/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2014, Arnaud Roques
*
* Project Info: http://plantuml.sourceforge.net
*
* This file is part of PlantUML.
*
* Licensed under The MIT License (Massachusetts Institute of Technology License)
*
* See http://opensource.org/licenses/MIT
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
* IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*
* Original Author: Arnaud Roques
*/
package net.sourceforge.plantuml.graphic;
import java.awt.Color;
import net.sourceforge.plantuml.ugraphic.ColorMapper;
public class HtmlColorGradient implements HtmlColor {
private final HtmlColor color1;
private final HtmlColor color2;
private final char policy;
public HtmlColorGradient(HtmlColor color1, HtmlColor color2, char policy) {
if (color1 == null || color2 == null) {
throw new IllegalArgumentException();
}
this.color1 = color1;
this.color2 = color2;
this.policy = policy;
}
public final HtmlColor getColor1() {
return color1;
}
public final HtmlColor getColor2() {
return color2;
}
public final Color getColor(ColorMapper mapper, double coeff) {
if (coeff > 1 || coeff < 0) {
throw new IllegalArgumentException("c=" + coeff);
}
final Color c1 = mapper.getMappedColor(color1);
final Color c2 = mapper.getMappedColor(color2);
final int vred = c2.getRed() - c1.getRed();
final int vgreen = c2.getGreen() - c1.getGreen();
final int vblue = c2.getBlue() - c1.getBlue();
final int red = c1.getRed() + (int) (coeff * vred);
final int green = c1.getGreen() + (int) (coeff * vgreen);
final int blue = c1.getBlue() + (int) (coeff * vblue);
return new Color(red, green, blue);
}
public final char getPolicy() {
return policy;
}
}
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