    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}