/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.sanselan.common;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.sanselan.ImageReadException;
import org.apache.sanselan.common.mylzw.MyLZWCompressor;
import org.apache.sanselan.common.mylzw.MyLZWDecompressor;
public class Compression
{
public byte[] decompressLZW(byte compressed[], int LZWMinimumCodeSize,
int expectedSize, int byteOrder) throws IOException
{
InputStream is = new ByteArrayInputStream(compressed);
MyLZWDecompressor decompressor = new MyLZWDecompressor(
LZWMinimumCodeSize, byteOrder);
byte[] result = decompressor.decompress(is, expectedSize);
return result;
}
public byte[] decompressPackBits(byte compressed[], int expectedSize,
int byteOrder) throws ImageReadException, IOException
{
byte unpacked[] = new PackBits().decompress(compressed, expectedSize);
return unpacked;
}
public byte[] compressLZW(byte src[], int LZWMinimumCodeSize,
int byteOrder, boolean earlyLimit) throws IOException
{
MyLZWCompressor compressor = new MyLZWCompressor(LZWMinimumCodeSize,
byteOrder, earlyLimit);
byte compressed[] = compressor.compress(src);
return compressed;
}
}