1/* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21package proguard.gui.splash; 22 23import java.awt.*; 24 25/** 26 * This VariableColor varies linearly with respect to its Timing. 27 * 28 * @author Eric Lafortune 29 */ 30public class LinearColor implements VariableColor 31{ 32 private final Color fromValue; 33 private final Color toValue; 34 private final Timing timing; 35 36 private double cachedTiming = -1.0; 37 private Color cachedColor; 38 39 40 /** 41 * Creates a new LinearColor. 42 * @param fromValue the value that corresponds to a timing of 0. 43 * @param toValue the value that corresponds to a timing of 1. 44 * @param timing the applied timing. 45 */ 46 public LinearColor(Color fromValue, Color toValue, Timing timing) 47 { 48 this.fromValue = fromValue; 49 this.toValue = toValue; 50 this.timing = timing; 51 } 52 53 54 // Implementation for VariableColor. 55 56 public Color getColor(long time) 57 { 58 double t = timing.getTiming(time); 59 if (t != cachedTiming) 60 { 61 cachedTiming = t; 62 cachedColor = 63 t == 0.0 ? fromValue : 64 t == 1.0 ? toValue : 65 new Color((int)(fromValue.getRed() + t * (toValue.getRed() - fromValue.getRed())), 66 (int)(fromValue.getGreen() + t * (toValue.getGreen() - fromValue.getGreen())), 67 (int)(fromValue.getBlue() + t * (toValue.getBlue() - fromValue.getBlue()))); 68 } 69 70 return cachedColor; 71 } 72} 73