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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program 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 2 of the License, or (at your option)
* any later version.
*
* This program 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 for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.gui.splash;
import java.awt.*;
/**
* This VariableColor varies linearly with respect to its Timing.
*
* @author Eric Lafortune
*/
public class LinearColor implements VariableColor
{
private final Color fromValue;
private final Color toValue;
private final Timing timing;
private double cachedTiming = -1.0;
private Color cachedColor;
/**
* Creates a new LinearColor.
* @param fromValue the value that corresponds to a timing of 0.
* @param toValue the value that corresponds to a timing of 1.
* @param timing the applied timing.
*/
public LinearColor(Color fromValue, Color toValue, Timing timing)
{
this.fromValue = fromValue;
this.toValue = toValue;
this.timing = timing;
}
// Implementation for VariableColor.
public Color getColor(long time)
{
double t = timing.getTiming(time);
if (t != cachedTiming)
{
cachedTiming = t;
cachedColor =
t == 0.0 ? fromValue :
t == 1.0 ? toValue :
new Color((int)(fromValue.getRed() + t * (toValue.getRed() - fromValue.getRed())),
(int)(fromValue.getGreen() + t * (toValue.getGreen() - fromValue.getGreen())),
(int)(fromValue.getBlue() + t * (toValue.getBlue() - fromValue.getBlue())));
}
return cachedColor;
}
}
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