Package org.loboevolution.pdfview.decode

Class RunLengthDecode

java.lang.Object

org.loboevolution.pdfview.decode.RunLengthDecode

public class RunLengthDecode
extends Object

decode an array of Run Length encoded bytes into a byte array

Author Mike Wessler

Method Summary

Modifier and Type	Method	Description
static ByteBuffer	decode(ByteBuffer buf, PDFObject params)	decode an array of bytes in RunLength format.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

decode

public static ByteBuffer decode(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 buffer

params - parameters to the decoder (ignored)

Returns:

the decoded bytes

Throws:

PDFParseException - if any.