org.apache.commons.imaging.formats.psd.datareaders.CompressedDataReader Maven / Gradle / Ivy
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
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package org.apache.commons.imaging.formats.psd.datareaders;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteOrder;
import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.common.BinaryFileParser;
import org.apache.commons.imaging.common.BinaryFunctions;
import org.apache.commons.imaging.common.PackBits;
import org.apache.commons.imaging.common.mylzw.BitsToByteInputStream;
import org.apache.commons.imaging.common.mylzw.MyBitInputStream;
import org.apache.commons.imaging.formats.psd.ImageContents;
import org.apache.commons.imaging.formats.psd.PsdHeaderInfo;
import org.apache.commons.imaging.formats.psd.dataparsers.DataParser;
import org.apache.commons.imaging.util.IoUtils;
public class CompressedDataReader implements DataReader {
private DataParser dataParser;
public CompressedDataReader(final DataParser dataParser) {
this.dataParser = dataParser;
}
public void readData(final InputStream is, final BufferedImage bi,
final ImageContents imageContents, final BinaryFileParser bfp)
throws ImageReadException, IOException {
final PsdHeaderInfo header = imageContents.header;
final int width = header.columns;
final int height = header.rows;
// this.setDebug(true);
final int scanlineCount = height * header.channels;
final int[] scanlineBytecounts = new int[scanlineCount];
for (int i = 0; i < scanlineCount; i++) {
scanlineBytecounts[i] = BinaryFunctions.read2Bytes("scanline_bytecount[" + i
+ "]", is, "PSD: bad Image Data", bfp.getByteOrder());
}
bfp.setDebug(false);
// System.out.println("fImageContents.Compression: "
// + imageContents.Compression);
final int depth = header.depth;
final int channelCount = dataParser.getBasicChannelsCount();
final int[][][] data = new int[channelCount][height][];
// channels[0] =
for (int channel = 0; channel < channelCount; channel++) {
for (int y = 0; y < height; y++) {
final int index = channel * height + y;
final byte[] packed = BinaryFunctions.readBytes("scanline",
is, scanlineBytecounts[index],
"PSD: Missing Image Data");
final byte[] unpacked = new PackBits().decompress(packed, width);
final InputStream bais = new ByteArrayInputStream(unpacked);
final MyBitInputStream mbis = new MyBitInputStream(bais, ByteOrder.BIG_ENDIAN);
BitsToByteInputStream bbis = null;
boolean canThrow = false;
try {
bbis = new BitsToByteInputStream(mbis, 8); // we want all samples to be bytes
final int[] scanline = bbis.readBitsArray(depth, width);
data[channel][y] = scanline;
canThrow = true;
} finally {
IoUtils.closeQuietly(canThrow, bbis);
}
}
}
dataParser.parseData(data, bi, imageContents);
}
}