/*
* 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.formats.tiff;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.sanselan.common.BinaryConstants;
import org.apache.sanselan.common.mylzw.MyLZWCompressor;
import org.apache.sanselan.common.mylzw.MyLZWDecompressor;
import org.apache.sanselan.util.Debug;
public class TiffLZWTest extends TiffBaseTest implements BinaryConstants
{
public void testTrivial() throws IOException
{
byte bytes[] = { 0, };
compressRoundtripAndValidate(bytes);
}
public void testMedium() throws IOException
{
int LENGTH = 1024 * 32;
byte bytes[] = new byte[LENGTH];
for (int modulator = 1; modulator < 255; modulator += 3)
{
for (int i = 0; i < LENGTH; i++)
bytes[i] = (byte) (0xff & (i % modulator));
compressRoundtripAndValidate(bytes);
}
}
// public void testTiffImageData() throws IOException, ImageReadException,
// ImageWriteException
// {
// List images = getTiffImages();
// for (int i = 0; i < images.size(); i++)
// {
// if (i % 10 == 0)
// Debug.purgeMemory();
//
// File imageFile = (File) images.get(i);
// Debug.debug("imageFile", imageFile);
//
// ByteSource byteSource = new ByteSourceFile(imageFile);
// Map params = new HashMap();
// List data = new TiffImageParser().collectRawImageData(byteSource,
// params);
//
// for (int j = 0; j < data.size(); j++)
// {
// byte bytes[] = (byte[]) data.get(j);
// decompressRoundtripAndValidate(bytes);
// }
// }
// }
private void compressRoundtripAndValidate(byte src[]) throws IOException
{
final boolean DEBUG = false;
if (DEBUG)
{
Debug.debug();
Debug.debug("roundtripAndValidate: " + src.length);
Debug.debug();
}
int LZW_MINIMUM_CODE_SIZE = 8;
final List codes = new ArrayList();
MyLZWCompressor.Listener compressionListener = new MyLZWCompressor.Listener() {
public void dataCode(int code)
{
codes.add(new Integer(code));
}
public void eoiCode(int code)
{
codes.add(new Integer(code));
}
public void clearCode(int code)
{
codes.add(new Integer(code));
}
public void init(int clearCode, int eoiCode)
{
}
};
MyLZWCompressor compressor = new MyLZWCompressor(LZW_MINIMUM_CODE_SIZE,
BYTE_ORDER_MSB, true, compressionListener);
byte compressed[] = compressor.compress(src);
MyLZWDecompressor.Listener decompressionListener = new MyLZWDecompressor.Listener() {
int index = 0;
int clearCode, eoiCode;
public void code(int code)
{
if (DEBUG)
{
if (code == clearCode)
{
Debug.debug("clearCode: " + index + "/" + codes.size());
Debug.debug();
}
if (code == eoiCode)
{
Debug.debug("eoiCode: " + index + "/" + codes.size());
Debug.debug();
}
}
Integer expectedCode = (Integer) codes.get(index++);
if (code != expectedCode.intValue())
{
Debug.debug("bad code: " + index + "/" + codes.size());
Debug.debug("code: " + code + " (0x"
+ Integer.toHexString(code) + ") "
+ Integer.toBinaryString(code));
Debug.debug("expected: " + expectedCode + " (0x"
+ Integer.toHexString(expectedCode.intValue())
+ ") "
+ Integer.toBinaryString(expectedCode.intValue()));
Debug.debug("clearCode: " + clearCode + " (0x"
+ Integer.toHexString(clearCode) + ") "
+ Integer.toBinaryString(clearCode));
Debug.debug("eoiCode: " + eoiCode + " (0x"
+ Integer.toHexString(eoiCode) + ") "
+ Integer.toBinaryString(eoiCode));
Debug.debug();
}
}
public void init(int clearCode, int eoiCode)
{
this.clearCode = clearCode;
this.eoiCode = eoiCode;
}
};
InputStream is = new ByteArrayInputStream(compressed);
MyLZWDecompressor decompressor = new MyLZWDecompressor(
LZW_MINIMUM_CODE_SIZE, BYTE_ORDER_NETWORK,
decompressionListener);
decompressor.setTiffLZWMode();
byte decompressed[] = decompressor.decompress(is, src.length);
assertEquals(src.length, decompressed.length);
for (int i = 0; i < src.length; i++)
assertEquals(src[i], decompressed[i]);
}
private void decompressRoundtripAndValidate(byte src[]) throws IOException
{
Debug.debug();
Debug.debug("roundtripAndValidate: " + src.length);
Debug.debug();
int LZW_MINIMUM_CODE_SIZE = 8;
final List codes = new ArrayList();
MyLZWDecompressor.Listener decompressionListener = new MyLZWDecompressor.Listener() {
public void code(int code)
{
Debug.debug("listener code: " + code + " (0x"
+ Integer.toHexString(code) + ") "
+ Integer.toBinaryString(code) + ", index: "
+ codes.size());
codes.add(new Integer(code));
}
public void init(int clearCode, int eoiCode)
{
}
};
InputStream is = new ByteArrayInputStream(src);
MyLZWDecompressor decompressor = new MyLZWDecompressor(
LZW_MINIMUM_CODE_SIZE, BYTE_ORDER_NETWORK,
decompressionListener);
decompressor.setTiffLZWMode();
byte decompressed[] = decompressor.decompress(is, src.length);
MyLZWCompressor.Listener compressionListener = new MyLZWCompressor.Listener() {
int clearCode, eoiCode;
public void init(int clearCode, int eoiCode)
{
this.clearCode = clearCode;
this.eoiCode = eoiCode;
}
int index = 0;
private void code(int code)
{
if (code == clearCode)
{
Debug.debug("clearCode: " + index + "/" + codes.size());
Debug.debug();
}
if (code == eoiCode)
{
Debug.debug("eoiCode: " + index + "/" + codes.size());
Debug.debug();
}
Integer expectedCode = (Integer) codes.get(index++);
if (code != expectedCode.intValue())
{
Debug.debug("bad code: " + index + "/" + codes.size());
Debug.debug("code: " + code + " (0x"
+ Integer.toHexString(code) + ") "
+ Integer.toBinaryString(code));
Debug.debug("expected: " + expectedCode + " (0x"
+ Integer.toHexString(expectedCode.intValue())
+ ") "
+ Integer.toBinaryString(expectedCode.intValue()));
Debug.debug("clearCode: " + clearCode + " (0x"
+ Integer.toHexString(clearCode) + ") "
+ Integer.toBinaryString(clearCode));
Debug.debug("eoiCode: " + eoiCode + " (0x"
+ Integer.toHexString(eoiCode) + ") "
+ Integer.toBinaryString(eoiCode));
Debug.debug();
}
}
public void dataCode(int code)
{
code(code);
}
public void eoiCode(int code)
{
code(code);
}
public void clearCode(int code)
{
code(code);
}
};
MyLZWCompressor compressor = new MyLZWCompressor(LZW_MINIMUM_CODE_SIZE,
BYTE_ORDER_MSB, true, compressionListener);
byte compressed[] = compressor.compress(decompressed);
assertEquals(src.length, compressed.length);
for (int i = 0; i < src.length; i++)
assertEquals(src[i], compressed[i]);
}
}