001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.imaging.formats.psd.datareaders;
018
019import java.awt.image.BufferedImage;
020import java.io.ByteArrayInputStream;
021import java.io.IOException;
022import java.io.InputStream;
023import java.nio.ByteOrder;
024
025import org.apache.commons.imaging.ImagingException;
026import org.apache.commons.imaging.common.Allocator;
027import org.apache.commons.imaging.common.BinaryFileParser;
028import org.apache.commons.imaging.common.BinaryFunctions;
029import org.apache.commons.imaging.common.PackBits;
030import org.apache.commons.imaging.formats.psd.PsdHeaderInfo;
031import org.apache.commons.imaging.formats.psd.PsdImageContents;
032import org.apache.commons.imaging.formats.psd.dataparsers.AbstractDataParser;
033import org.apache.commons.imaging.mylzw.BitsToByteInputStream;
034import org.apache.commons.imaging.mylzw.MyBitInputStream;
035
036public class CompressedDataReader implements DataReader {
037
038    private final AbstractDataParser dataParser;
039
040    public CompressedDataReader(final AbstractDataParser dataParser) {
041        this.dataParser = dataParser;
042    }
043
044    @Override
045    public void readData(final InputStream is, final BufferedImage bi, final PsdImageContents imageContents, final BinaryFileParser bfp)
046            throws ImagingException, IOException {
047        final PsdHeaderInfo header = imageContents.header;
048        final int width = header.columns;
049        final int height = header.rows;
050
051        // this.setDebug(true);
052        final int scanlineCount = height * header.channels;
053        final int[] scanlineByteCounts = Allocator.intArray(scanlineCount);
054        for (int i = 0; i < scanlineCount; i++) {
055            scanlineByteCounts[i] = BinaryFunctions.read2Bytes("scanlineByteCounts[" + i + "]", is, "PSD: bad Image Data", bfp.getByteOrder());
056        }
057        // System.out.println("fImageContents.Compression: "
058        // + imageContents.Compression);
059
060        final int depth = header.depth;
061
062        final int channelCount = dataParser.getBasicChannelsCount();
063        final int[][][] data = new int[Allocator.check(channelCount)][Allocator.check(height)][];
064        // channels[0] =
065        for (int channel = 0; channel < channelCount; channel++) {
066            for (int y = 0; y < height; y++) {
067                final int index = channel * height + y;
068                final byte[] packed = BinaryFunctions.readBytes("scanline", is, scanlineByteCounts[index], "PSD: Missing Image Data");
069
070                final byte[] unpacked = PackBits.decompress(packed, width);
071                try (InputStream bais = new ByteArrayInputStream(unpacked);
072                        MyBitInputStream mbis = new MyBitInputStream(bais, ByteOrder.BIG_ENDIAN, false)) {
073                    // we want all samples to be bytes
074                    try (BitsToByteInputStream bbis = new BitsToByteInputStream(mbis, 8)) {
075                        final int[] scanline = bbis.readBitsArray(depth, width);
076                        data[channel][y] = scanline;
077                    }
078                }
079            }
080        }
081        dataParser.parseData(data, bi, imageContents);
082    }
083
084}