Package org.openpdf.renderer.decode

Class TIFFPredictor

java.lang.Object

org.openpdf.renderer.decode.Predictor

org.openpdf.renderer.decode.TIFFPredictor

public class TIFFPredictor
extends Predictor

Undo prediction based on the TIFF Predictor 2 algorithm

Field Summary

Fields inherited from class org.openpdf.renderer.decode.Predictor

PNG, TIFF

Constructor Summary

Constructors

Constructor	Description
TIFFPredictor()

Method Summary

Modifier and Type	Method	Description
private static byte	getbits(byte[] data, int bitIndex, int shiftWhenByteAligned, int mask)
private static void	setbits(byte[] data, int bitIndex, int shiftWhenByteAligned, int mask, byte bits)
ByteBuffer	unpredict(ByteBuffer imageData)	Undo data based on the png algorithm

Methods inherited from class org.openpdf.renderer.decode.Predictor

getAlgorithm, getBitsPerComponent, getColors, getColumns, getPredictor, setBitsPerComponent, setColors, setColumns

Methods inherited from class java.lang.Object

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

Constructor Details

TIFFPredictor

public TIFFPredictor()

Method Details

unpredict

public ByteBuffer unpredict(ByteBuffer imageData)
                     throws IOException

Undo data based on the png algorithm

Specified by:

unpredict in class Predictor

Throws:

IOException

getbits

private static byte getbits(byte[] data,
 int bitIndex,
 int shiftWhenByteAligned,
 int mask)

setbits

private static void setbits(byte[] data,
 int bitIndex,
 int shiftWhenByteAligned,
 int mask,
 byte bits)