/*
* ChannelColorScheme.java
*
* Copyright (c) 2002-2015 Alexei Drummond, Andrew Rambaut and Marc Suchard
*
* This file is part of BEAST.
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership and licensing.
*
* BEAST is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* BEAST 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with BEAST; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
package dr.geo.color;
import java.awt.*;
import java.util.ArrayList;
/**
* Created by msuchard on 4/18/14.
*/
public interface ChannelColorScheme {
Color getColor(java.util.List<Double> input, java.util.List<Double> min, java.util.List<Double> max);
static class MultipleChannelColorScheme implements ChannelColorScheme {
private final ColorScheme[] schemes;
MultipleChannelColorScheme(ColorScheme[] schemes) {
this.schemes = schemes;
}
public Color getColor(java.util.List<Double> input, java.util.List<Double> min, java.util.List<Double> max) {
java.util.List<Color> colors = new ArrayList<Color>();
final int channels = schemes.length; // assumes the same length as input, min, max
for (int i = 0; i < channels; ++i) {
colors.add(schemes[i].getColor(input.get(i), min.get(i), max.get(i)));
}
return blend(colors);
}
private static Color blend(java.util.List<Color> colors) {
double totalAlpha = 0.0;
for (Color color : colors) {
totalAlpha += color.getAlpha();
}
double r = 0.0;
double g = 0.0;
double b = 0.0;
double a = 0.0;
for (Color color : colors) {
double weight = color.getAlpha();
r += weight * color.getRed();
g += weight * color.getGreen();
b += weight * color.getBlue();
a = Math.max(a, weight);
}
r /= totalAlpha;
g /= totalAlpha;
b /= totalAlpha;
return new Color((int) r, (int) g, (int) b, (int) a);
}
}
public static final ChannelColorScheme CHANNEL_RED = new MultipleChannelColorScheme(
new ColorScheme[]{ColorScheme.WHITE_RED}
);
public static final ChannelColorScheme CHANNEL_RED_BLUE = new MultipleChannelColorScheme(
new ColorScheme[]{ColorScheme.WHITE_RED, ColorScheme.WHITE_BLUE}
);
}