Here you can find the source of multiply(double color1, double color2)
static double multiply(double color1, double color2)
//package com.java2s; /**/* w ww. ja va 2 s.c o m*/ * MIT License (MIT) * * Copyright (c) 2014 Volker Berlin * * 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, * UT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @author Volker Berlin * @license: The MIT license <http://opensource.org/licenses/MIT> */ public class Main { static double multiply(double color1, double color2) { long argb1 = Double.doubleToRawLongBits(color1); long r1 = ((argb1 >> 32) & 0xFFFF); long g1 = ((argb1 >> 16) & 0xFFFF); long b1 = ((argb1) & 0xFFFF); long argb2 = Double.doubleToRawLongBits(color2); long r2 = ((argb2 >> 32) & 0xFFFF); long g2 = ((argb2 >> 16) & 0xFFFF); long b2 = ((argb2) & 0xFFFF); argb1 = ((r1 * r2) / 0xFF00) << 32 | ((g1 * g2) / 0xFF00) << 16 | ((b1 * b2) / 0xFF00); return Double.longBitsToDouble(argb1); } }