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plantuml/src/net/sourceforge/plantuml/klimt/color/HColorGradient.java

104 lines
2.8 KiB
Java

/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
* https://plantuml.com/patreon (only 1$ per month!)
* https://plantuml.com/paypal
*
* This file is part of PlantUML.
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PlantUML 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 for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
*
* Original Author: Arnaud Roques
*
*/
package net.sourceforge.plantuml.klimt.color;
import java.awt.Color;
import java.util.Objects;
public class HColorGradient extends HColor {
private final HColor color1;
private final HColor color2;
private final char policy;
HColorGradient(HColor color1arg, HColor color2arg, char policy) {
if (color1arg instanceof HColorGradient)
color1arg = ((HColorGradient) color1arg).color1;
if (color2arg instanceof HColorGradient)
color2arg = ((HColorGradient) color2arg).color2;
this.color1 = Objects.requireNonNull(color1arg);
this.color2 = Objects.requireNonNull(color2arg);
this.policy = policy;
}
public final HColor getColor1() {
return color1;
}
public final HColor getColor2() {
return color2;
}
public final Color getColor(ColorMapper mapper, double coeff) {
if (coeff > 1 || coeff < 0)
throw new IllegalArgumentException("c=" + coeff);
final Color c1 = color1.toColor(mapper);
final Color c2 = color2.toColor(mapper);
final int diffRed = c2.getRed() - c1.getRed();
final int diffGreen = c2.getGreen() - c1.getGreen();
final int diffBlue = c2.getBlue() - c1.getBlue();
final int vRed = (int) (coeff * diffRed);
final int vGreen = (int) (coeff * diffGreen);
final int vBlue = (int) (coeff * diffBlue);
final int red = c1.getRed() + vRed;
final int green = c1.getGreen() + vGreen;
final int blue = c1.getBlue() + vBlue;
return new Color(red, green, blue);
}
public final char getPolicy() {
return policy;
}
@Override
public Color toColor(ColorMapper mapper) {
return color1.toColor(mapper);
}
@Override
public HColor opposite() {
return color1.opposite();
}
}