Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* $RCSfile: TIFFLZWCompressor.java,v $
*
*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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 Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.1 $
* $Date: 2005/02/11 05:01:48 $
* $State: Exp $
*/
package com.github.jaiimageio.impl.plugins.tiff;
import java.io.IOException;
import javax.imageio.stream.ImageOutputStream;
import com.github.jaiimageio.impl.common.LZWCompressor;
import com.github.jaiimageio.plugins.tiff.BaselineTIFFTagSet;
import com.github.jaiimageio.plugins.tiff.TIFFCompressor;
/**
* LZW Compressor.
*/
public class TIFFLZWCompressor extends TIFFCompressor {
int predictor;
public TIFFLZWCompressor(int predictorValue) {
super("LZW", BaselineTIFFTagSet.COMPRESSION_LZW, true);
this.predictor = predictorValue;
}
public void setStream(ImageOutputStream stream) {
super.setStream(stream);
}
public int encode(byte[] b, int off,
int width, int height,
int[] bitsPerSample,
int scanlineStride) throws IOException {
LZWCompressor lzwCompressor = new LZWCompressor(stream, 8, true);
int samplesPerPixel = bitsPerSample.length;
int bitsPerPixel = 0;
for (int i = 0; i < samplesPerPixel; i++) {
bitsPerPixel += bitsPerSample[i];
}
int bytesPerRow = (bitsPerPixel*width + 7)/8;
long initialStreamPosition = stream.getStreamPosition();
boolean usePredictor =
predictor == BaselineTIFFTagSet.PREDICTOR_HORIZONTAL_DIFFERENCING;
if(bytesPerRow == scanlineStride && !usePredictor) {
lzwCompressor.compress(b, off, bytesPerRow*height);
} else {
byte[] rowBuf = usePredictor ? new byte[bytesPerRow] : null;
for(int i = 0; i < height; i++) {
if(usePredictor) {
// Cannot modify b[] in place as it might be a data
// array from the image being written so make a copy.
System.arraycopy(b, off, rowBuf, 0, bytesPerRow);
for(int j = bytesPerRow - 1; j >= samplesPerPixel; j--) {
rowBuf[j] -= rowBuf[j - samplesPerPixel];
}
lzwCompressor.compress(rowBuf, 0, bytesPerRow);
} else {
lzwCompressor.compress(b, off, bytesPerRow);
}
off += scanlineStride;
}
}
lzwCompressor.flush();
int bytesWritten =
(int)(stream.getStreamPosition() - initialStreamPosition);
return bytesWritten;
}
}