001/*
002 * $RCSfile: TIFFLSBCompressor.java,v $
003 *
004 * 
005 * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
006 * 
007 * Redistribution and use in source and binary forms, with or without
008 * modification, are permitted provided that the following conditions
009 * are met: 
010 * 
011 * - Redistribution of source code must retain the above copyright 
012 *   notice, this  list of conditions and the following disclaimer.
013 * 
014 * - Redistribution in binary form must reproduce the above copyright
015 *   notice, this list of conditions and the following disclaimer in 
016 *   the documentation and/or other materials provided with the
017 *   distribution.
018 * 
019 * Neither the name of Sun Microsystems, Inc. or the names of 
020 * contributors may be used to endorse or promote products derived 
021 * from this software without specific prior written permission.
022 * 
023 * This software is provided "AS IS," without a warranty of any 
024 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
025 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
026 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
028 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
029 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
031 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035 * POSSIBILITY OF SUCH DAMAGES. 
036 * 
037 * You acknowledge that this software is not designed or intended for 
038 * use in the design, construction, operation or maintenance of any 
039 * nuclear facility. 
040 *
041 * $Revision: 1.1 $
042 * $Date: 2005/02/11 05:01:47 $
043 * $State: Exp $
044 */
045package com.github.jaiimageio.impl.plugins.tiff;
046
047import java.io.IOException;
048
049import com.github.jaiimageio.plugins.tiff.BaselineTIFFTagSet;
050import com.github.jaiimageio.plugins.tiff.TIFFCompressor;
051
052/**
053 * Uncompressed data with LSB-to-MSB fill order.
054 */
055public class TIFFLSBCompressor extends TIFFCompressor {
056
057    public TIFFLSBCompressor() {
058        super("", BaselineTIFFTagSet.COMPRESSION_NONE, true);
059    }
060
061    public int encode(byte[] b, int off,
062                      int width, int height,
063                      int[] bitsPerSample,
064                      int scanlineStride) throws IOException {
065        int bitsPerPixel = 0;
066        for (int i = 0; i < bitsPerSample.length; i++) {
067            bitsPerPixel += bitsPerSample[i];
068        }
069        int bytesPerRow = (bitsPerPixel*width + 7)/8;
070        byte[] compData = new byte[bytesPerRow];
071        byte[] flipTable = TIFFFaxDecompressor.flipTable;
072        for (int row = 0; row < height; row++) {
073            System.arraycopy(b, off, compData, 0, bytesPerRow);
074            for(int j = 0; j < bytesPerRow; j++) {
075                compData[j] = flipTable[compData[j]&0xff];
076            }
077            stream.write(compData, 0, bytesPerRow);
078            off += scanlineStride;
079        }
080        return height*bytesPerRow;
081    }
082}