colormodel.java

kaffe是一个java虚拟机的源代码。里面包含了一些java例程和标准的java包。

/**
 * ColorModel - 
 *
 * Copyright (c) 1998
 *      Transvirtual Technologies, Inc.  All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution 
 * of this file. 
 *
 * @author P. Mehlitz
 */

package java.awt.image;

import kaffe.awt.JavaColorModel;

abstract public class ColorModel
{
	protected int pixel_bits;

public ColorModel ( int bitsPerPixel ) {
	pixel_bits = bitsPerPixel;
}

abstract public int getAlpha ( int pixel );

abstract public int getBlue ( int pixel );

abstract public int getGreen ( int pixel );

public int getPixelSize () {
	return pixel_bits;
}

public int getRGB ( int pixel ) {
	return (getAlpha(pixel) << 24)
		     | (getRed(pixel) << 16) | (getGreen(pixel) << 8) | getBlue(pixel);
}

public static ColorModel getRGBdefault() {
	return JavaColorModel.getSingleton();
}

abstract public int getRed ( int pixel );
}