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https://github.com/geometer/FBReaderJ.git
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bcc798d801
git-svn-id: https://only.mawhrin.net/repos/FBReaderJ/trunk@1055 6a642e6f-84f6-412e-ac94-c4a38d5a04b0
78 lines
2.6 KiB
Java
78 lines
2.6 KiB
Java
/*
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* Copyright (C) 2007-2010 Geometer Plus <contact@geometerplus.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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package org.geometerplus.fbreader.formats.plucker;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.zip.DataFormatException;
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import java.util.zip.Inflater;
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import org.geometerplus.zlibrary.core.image.ZLSingleImage;
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import org.geometerplus.zlibrary.core.library.ZLibrary;
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import org.geometerplus.zlibrary.core.filesystem.ZLFile;
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public class ZCompressedFileImage extends ZLSingleImage {
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private final ZLFile myFile;
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private final int myOffset;
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private final int myCompressedSize;
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public ZCompressedFileImage(String mimeType, final ZLFile file, final int offset, final int compressedSize) {
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super(mimeType);
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myFile = file;
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myOffset = offset;
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myCompressedSize = compressedSize;
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}
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public byte[] byteData() {
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try {
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final InputStream stream = myFile.getInputStream();
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if (stream == null) {
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return new byte[0];
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}
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final ArrayList data = new ArrayList();
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byte[] buffer;
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int sizeOfBufferData;
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stream.skip(myOffset);
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byte [] targetBuffer = new byte[myCompressedSize];
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stream.read(targetBuffer, 0, myCompressedSize);
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Inflater decompressor = new Inflater();
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decompressor.setInput(targetBuffer, 0, myCompressedSize);
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do {
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buffer = new byte[4096];
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sizeOfBufferData = decompressor.inflate(buffer);
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data.add(buffer);
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} while (sizeOfBufferData == 4096);
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decompressor.end();
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final int dataSizeMinus1 = data.size() - 1;
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buffer = new byte[dataSizeMinus1 * 4096 + sizeOfBufferData];
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for (int i = 0; i < dataSizeMinus1; ++i) {
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System.arraycopy(data.get(i), 0, buffer, i * 4096, 4096);
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}
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System.arraycopy(data.get(dataSizeMinus1), 0, buffer, dataSizeMinus1 * 4096, sizeOfBufferData);
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return buffer;
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} catch (IOException e) {
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} catch (DataFormatException e) {
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}
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return new byte[0];
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}
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}
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