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//******************************************************************************
//
// File: IntRGB.java
// Package: edu.rit.color
// Unit: Class edu.rit.color.IntRGB
//
// This Java source file is copyright (C) 2005 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This Java source file is part of the Parallel Java Library ("PJ"). PJ 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.
//
// PJ 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.
//
// Linking this library statically or dynamically with other modules is making a
// combined work based on this library. Thus, the terms and conditions of the
// GNU General Public License cover the whole combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent modules, and
// to copy and distribute the resulting executable under terms of your choice,
// provided that you also meet, for each linked independent module, the terms
// and conditions of the license of that module. An independent module is a
// module which is not derived from or based on this library. If you modify this
// library, you may extend this exception to your version of the library, but
// you are not obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************
package edu.rit.color;
/**
* Class IntRGB provides a color represented as integer red, green, and blue
* components.
* <P>
* Class IntRGB includes methods for packing and unpacking an integer RGB color
* object into and from an integer. The packed color representation uses 8 bits
* for each component, with the red component in bits 23-16, the green component
* in bits 15-8, and the blue component in bits 7-0.
*
* @author Alan Kaminsky
* @version 12-Dec-2005
*/
public class IntRGB
{
// Exported data members.
/**
* The red component in the range 0 through 255.
*/
public int red;
/**
* The green component in the range 0 through 255.
*/
public int green;
/**
* The blue component in the range 0 through 255.
*/
public int blue;
// Exported constructors.
/**
* Construct a new integer RGB color. The red, green, and blue components
* are all 0.
*/
public IntRGB()
{
}
/**
* Construct a new integer RGB color with the given red, green, and blue
* components.
*
* @param red Red component.
* @param green Green component.
* @param blue Blue component.
*/
public IntRGB
(int red,
int green,
int blue)
{
this.red = red;
this.green = green;
this.blue = blue;
}
/**
* Construct a new integer RGB color from the given packed color.
*
* @param color Packed color.
*/
public IntRGB
(int color)
{
this.unpack (color);
}
// Exported operations.
/**
* Pack this integer RGB color into a packed color.
*
* @return Packed color.
*/
public int pack()
{
return pack (this.red, this.green, this.blue);
}
/**
* Pack the given red, green, and blue components into a packed color.
*
* @param red Red component.
* @param green Green component.
* @param blue Blue component.
*
* @return Packed color.
*/
public static int pack
(int red,
int green,
int blue)
{
if (red < 0) red = 0;
else if (red > 255) red = 255;
if (green < 0) green = 0;
else if (green > 255) green = 255;
if (blue < 0) blue = 0;
else if (blue > 255) blue = 255;
return (red << 16) | (green << 8) | blue;
}
/**
* Unpack this integer RGB color from a packed color.
*
* @param color Packed color.
*/
public void unpack
(int color)
{
this.red = (color >> 16) & 0xFF;
this.green = (color >> 8) & 0xFF;
this.blue = (color ) & 0xFF;
}
}
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