diff options
Diffstat (limited to 'src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java')
| -rw-r--r-- | src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java b/src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java deleted file mode 100644 index d1fe1c1..0000000 --- a/src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java +++ /dev/null @@ -1,126 +0,0 @@ -/**
- * Copyright (c) 2004, www.pdfbox.org
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of pdfbox; nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * http://www.pdfbox.org
- *
- */
-package org.pdfbox.filter;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-import org.apache.log4j.Logger;
-import org.pdfbox.cos.COSDictionary;
-
-/**
- * This is a filter for the RunLength Decoder.
- *
- * From the PDF Reference
- * <pre>
- * The RunLengthDecode filter decodes data that has been encoded in a simple
- * byte-oriented format based on run length. The encoded data is a sequence of
- * runs, where each run consists of a length byte followed by 1 to 128 bytes of data. If
- * the length byte is in the range 0 to 127, the following length + 1 (1 to 128) bytes
- * are copied literally during decompression. If length is in the range 129 to 255, the
- * following single byte is to be copied 257 ? length (2 to 128) times during decompression.
- * A length value of 128 denotes EOD.
- *
- * The compression achieved by run-length encoding depends on the input data. In
- * the best case (all zeros), a compression of approximately 64:1 is achieved for long
- * files. The worst case (the hexadecimal sequence 00 alternating with FF) results in
- * an expansion of 127:128.
- * </pre>
- *
- * @author Ben Litchfield
- * @version $Revision: 1.3 $
- */
-public class RunLengthDecodeFilter implements Filter
-{
- private static Logger log = Logger.getLogger( RunLengthDecodeFilter.class );
-
- private static final int RUN_LENGTH_EOD = 128;
-
- /**
- * Constructor.
- */
- public RunLengthDecodeFilter()
- {
- //default constructor
- }
-
- /**
- * This will decode some compressed data.
- *
- * @param compressedData The compressed byte stream.
- * @param result The place to write the uncompressed byte stream.
- * @param options The options to use to encode the data.
- *
- * @throws IOException If there is an error decompressing the stream.
- */
- public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
- {
- int dupAmount = -1;
- byte[] buffer = new byte[128];
- while( (dupAmount = compressedData.read()) != -1 && dupAmount != RUN_LENGTH_EOD )
- {
- if( dupAmount <= 127 )
- {
- int amountToCopy = dupAmount+1;
- int compressedRead = 0;
- while( amountToCopy > 0 )
- {
- compressedRead = compressedData.read( buffer, 0, amountToCopy );
- result.write( buffer, 0, compressedRead );
- amountToCopy -= compressedRead;
- }
- }
- else
- {
- int dupByte = compressedData.read();
- for( int i=0; i<257-dupAmount; i++ )
- {
- result.write( dupByte );
- }
- }
- }
- }
-
- /**
- * This will encode some data.
- *
- * @param rawData The raw data to encode.
- * @param result The place to write to encoded results to.
- * @param options The options to use to encode the data.
- *
- * @throws IOException If there is an error compressing the stream.
- */
- public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
- {
- log.warn( "Warning: RunLengthDecodeFilter.encode is not implemented yet, skipping this stream." );
- }
-}
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