com.twelvemonkeys.image.MonochromeColorModel Maven / Gradle / Ivy
/*
* Copyright (c) 2008, Harald Kuhr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.twelvemonkeys.image;
import java.awt.image.DataBuffer;
import java.awt.image.IndexColorModel;
/**
* Monochrome B/W color model.
*
* @author Harald Kuhr
*/
public class MonochromeColorModel extends IndexColorModel {
private final static int[] MONO_PALETTE = {0x00000000, 0x00FFFFFF};
private static MonochromeColorModel sInstance = new MonochromeColorModel();
private MonochromeColorModel() {
super(1, 2, MONO_PALETTE, 0, false, -1, DataBuffer.TYPE_BYTE);
}
public static IndexColorModel getInstance() {
return sInstance;
}
public synchronized Object getDataElements(int pRGB, Object pPixel) {
// Get color components
int r = pRGB >> 16 & 0xFF;
int g = pRGB >> 8 & 0xFF;
int b = pRGB & 0xFF;
// ITU standard: Gray scale=(222*Red+707*Green+71*Blue)/1000
int gray = (222 * r + 707 * g + 71 * b) / 1000;
byte[] pixel;
if (pPixel != null) {
pixel = (byte[]) pPixel;
}
else {
pixel = new byte[1];
}
if (gray <= 0x80) {
pixel[0] = 0;
}
else {
pixel[0] = 1;
}
return pixel;
}
}