Package com.sun.pdfview.decode
Class RunLengthDecode
java.lang.Object
com.sun.pdfview.decode.RunLengthDecode
decode an array of Run Length encoded bytes into a byte array
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate ByteBuffer
private static final int
the end of data in the RunLength encoding. -
Constructor Summary
ConstructorsModifierConstructorDescriptionprivate
initialize the decoder with an array of bytes in RunLength format -
Method Summary
Modifier and TypeMethodDescriptionprivate ByteBuffer
decode()
decode the arraystatic ByteBuffer
decode
(ByteBuffer buf, PDFObject params) decode an array of bytes in RunLength format.
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Field Details
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RUN_LENGTH_EOD
private static final int RUN_LENGTH_EODthe end of data in the RunLength encoding.- See Also:
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buf
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Constructor Details
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RunLengthDecode
initialize the decoder with an array of bytes in RunLength format
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Method Details
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decode
decode the array- Returns:
- the decoded bytes
- Throws:
PDFParseException
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decode
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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