| /* |
| * 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.commons.imaging.common; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.commons.imaging.ImageReadException; |
| import org.apache.commons.imaging.common.mylzw.MyLzwCompressor; |
| import org.apache.commons.imaging.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 |
| { |
| 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; |
| } |
| |
| } |