Package com.sun.pdfview.decode
Class RunLengthDecode
- java.lang.Object
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- com.sun.pdfview.decode.RunLengthDecode
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public class RunLengthDecode extends java.lang.Object
decode an array of Run Length encoded bytes into a byte array
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Field Summary
Fields Modifier and Type Field Description private java.nio.ByteBuffer
buf
private static int
RUN_LENGTH_EOD
the end of data in the RunLength encoding.
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Constructor Summary
Constructors Modifier Constructor Description private
RunLengthDecode(java.nio.ByteBuffer buf)
initialize the decoder with an array of bytes in RunLength format
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description private java.nio.ByteBuffer
decode()
decode the arraystatic java.nio.ByteBuffer
decode(java.nio.ByteBuffer buf, PDFObject params)
decode an array of bytes in RunLength format.
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Field Detail
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RUN_LENGTH_EOD
private static final int RUN_LENGTH_EOD
the end of data in the RunLength encoding.- See Also:
- Constant Field Values
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buf
private java.nio.ByteBuffer buf
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Method Detail
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decode
private java.nio.ByteBuffer decode() throws PDFParseException
decode the array- Returns:
- the decoded bytes
- Throws:
PDFParseException
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decode
public static java.nio.ByteBuffer decode(java.nio.ByteBuffer buf, PDFObject params) throws PDFParseException
decode an array of bytes in RunLength format.RunLength format consists of a sequence of a byte-oriented format based on run length. There are a series of "runs", where a run is a length byte followed by 1 to 128 bytes of data. If the length is 0-127, the following length+1 (1 to 128) bytes are to be copied. If the length is 129 through 255, the following single byte is copied 257-length (2 to 128) times. A length value of 128 means and End of Data (EOD).
- Parameters:
buf
- the RUnLEngth encoded bytes in a byte bufferparams
- parameters to the decoder (ignored)- Returns:
- the decoded bytes
- Throws:
PDFParseException
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