View Javadoc
1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.imaging.formats.png.chunks;
18  
19  import java.io.ByteArrayInputStream;
20  import java.io.IOException;
21  import java.util.zip.InflaterInputStream;
22  
23  import org.apache.commons.imaging.ImageReadException;
24  
25  import static org.apache.commons.imaging.common.BinaryFunctions.*;
26  
27  public class PngChunkIccp extends PngChunk {
28      // private final PngImageParser parser;
29      public final String profileName;
30      public final int compressionMethod;
31      private final byte[] compressedProfile;
32      private final byte[] uncompressedProfile;
33  
34      public byte[] getUncompressedProfile() {
35          return uncompressedProfile; // TODO clone?
36      }
37  
38      public PngChunkIccp(
39      // PngImageParser parser,
40              final int length, final int chunkType, final int crc, final byte[] bytes)
41              throws ImageReadException, IOException {
42          super(length, chunkType, crc, bytes);
43          // this.parser = parser;
44  
45          final int index = findNull(bytes);
46          if (index < 0) {
47              throw new ImageReadException("PngChunkIccp: No Profile Name");
48          }
49          final byte[] nameBytes = new byte[index];
50          System.arraycopy(bytes, 0, nameBytes, 0, index);
51          profileName = new String(nameBytes, "ISO-8859-1");
52  
53          compressionMethod = bytes[index + 1];
54  
55          final int compressedProfileLength = bytes.length - (index + 1 + 1);
56          compressedProfile = new byte[compressedProfileLength];
57          System.arraycopy(bytes, index + 1 + 1, compressedProfile, 0, compressedProfileLength);
58  
59          if (getDebug()) {
60              System.out.println("ProfileName: " + profileName);
61              System.out.println("ProfileName.length(): " + profileName.length());
62              System.out.println("CompressionMethod: " + compressionMethod);
63              System.out.println("CompressedProfileLength: " + compressedProfileLength);
64              System.out.println("bytes.length: " + bytes.length);
65          }
66  
67          uncompressedProfile = getStreamBytes(new InflaterInputStream(new ByteArrayInputStream(compressedProfile)));
68  
69          if (getDebug()) {
70              System.out.println("UncompressedProfile: " + Integer.toString(bytes.length));
71          }
72      }
73  
74  }