IlvRunLengthEncoder Class Reference

RunLength encoder class. More...

#include <ilviews/util/psencode.h>

Inheritance diagram for IlvRunLengthEncoder:

List of all members.

Public Member Functions
	IlvRunLengthEncoder (ostream *stream=0)
	Constructor.
	~IlvRunLengthEncoder ()
	Destructor.
void	consumeByte (IlUChar byte)
	Consumes a byte.
void	flush ()
	Flushes the processed data to the output.
const char *	getPostScriptDecoderName () const
	Returns a string containing the PostScript decoding filter name.
void	init ()
	Initializes or reinitializes the instance.

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Detailed Description

RunLength encoder class.

Library: display

This class allows you to encode binary data to data in a run length encoded binary description. NOT YET IMPLEMENTED, just writes runs of 1. The generated data is a sequence of runs, each run consists of a length byte followed by 1 to 127 bytes of data. If the length byte is in the range 0 to 127, the following lenght + 1 byte (1 to 128 bytes) are to be copied literally upon decompression. if length is in the range 129 to 255, the following single byte is to be replicated 257 - length (2 to 128 times) upon decompression.

See also IlvPostScriptEncoder, IlvASCIIHexEncoder, IlvASCII85Encoder, IlvPSDevice, IlvPSColorDevice

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Constructor & Destructor Documentation

IlvRunLengthEncoder::IlvRunLengthEncoder

(

ostream *

stream = 0

)

Constructor.

Initializes a new instance of IlvASCII85Encoder.

Parameters:

stream

The output stream used by this instance.

IlvRunLengthEncoder::~IlvRunLengthEncoder

(

)

Destructor.

Flushes all remaining data.

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Member Function Documentation

void IlvRunLengthEncoder::consumeByte

(

IlUChar

byte

)

[virtual]

Consumes a byte.

Parameters:

byte

The received byte.

Implements IlvPostScriptEncoder.

const char* IlvRunLengthEncoder::getPostScriptDecoderName

(

)

const [virtual]

Returns a string containing the PostScript decoding filter name.

Returns:

The string "/RunLengthDecode".

Implements IlvPostScriptEncoder.