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git-svn-id: https://only.mawhrin.net/repos/FBReaderJ/trunk@867 6a642e6f-84f6-412e-ac94-c4a38d5a04b0

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tushkanchik 2008-07-02 17:11:17 +00:00
parent 3f5b545bff
commit 437f3bc407
6 changed files with 115 additions and 20 deletions
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60
src/org/geometerplus/fbreader/formats/plucker/ZCompressedFileImage.java Normal file
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package org.geometerplus.fbreader.formats.plucker;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import org.geometerplus.zlibrary.core.image.ZLSingleImage;
import org.geometerplus.zlibrary.core.library.ZLibrary;
public class ZCompressedFileImage extends ZLSingleImage {
private final String myPath;
private final int myOffset;
private final int myCompressedSize;
public ZCompressedFileImage(String mimeType, final String path, final int offset, final int compressedSize) {
super(mimeType);
myPath = path;
myOffset = offset;
myCompressedSize = compressedSize;
}
public byte[] byteData() {
final InputStream stream = ZLibrary.getInstance().getInputStream(myPath);
if (stream == null) {
return new byte[0];
}
final ArrayList data = new ArrayList();
byte[] buffer;
int sizeOfBufferData;
try {
stream.skip(myOffset);
byte [] targetBuffer = new byte[myCompressedSize];
stream.read(targetBuffer, 0, myCompressedSize);
Inflater decompressor = new Inflater();
decompressor.setInput(targetBuffer, 0, myCompressedSize);
do {
buffer = new byte[4096];
sizeOfBufferData = decompressor.inflate(buffer);
data.add(buffer);
} while (sizeOfBufferData == 4096);
decompressor.end();
final int dataSizeMinusOne = data.size() - 1;
buffer = new byte[dataSizeMinusOne * 4096 + sizeOfBufferData];
for (int i = 0; i < dataSizeMinusOne; ++i) {
System.arraycopy(data.get(i), 0, buffer, i * 4096, 4096);
}
System.arraycopy(data.get(dataSizeMinusOne), 0, buffer, dataSizeMinusOne * 4096, sizeOfBufferData);
return buffer;
} catch (IOException e) {
} catch (DataFormatException e) {
}
return new byte[0];
}
}