Package org.libtiff.jai.codecimpl

Class XTIFFPackTileCodec

java.lang.Object

org.libtiff.jai.codec.XTIFFTileCodecImpl

org.libtiff.jai.codecimpl.XTIFFPackTileCodec

All Implemented Interfaces:

XTIFFTileCodec

public class XTIFFPackTileCodec
extends XTIFFTileCodecImpl

This codec encapsulates all the logic for the default TIFF "packbits" bit-packing codec algorithm.

Field Summary

Fields inherited from class org.libtiff.jai.codec.XTIFFTileCodecImpl

_bdata, _sdata, bitsPerSample, bpixvals, buffer, colormap, compression, dataType, decodePaletteAsShorts, decodeParam, directory, encodeParam, image, image_type, isTiled, length, minX, minY, numBands, sampleModel, sampleSize, spixvals, tileLength, tileWidth, unitsInThisTile, width

Constructor Summary

Constructors

Constructor	Description
XTIFFPackTileCodec()

Method Summary

Modifier and Type	Method	Description
boolean	canEncode()	Indicate whether this codec can encode data.
XTIFFTileCodec	create()	Implement this to return the corresponding empty codec object.
void	decodeTilePixels(byte[] input, Rectangle newRect, byte[] bdata)	Decode a rectangle of pixels
void	decodeTilePixels(byte[] input, Rectangle newRect, short[] sdata)	Decode a rectangle of pixels
int	encodeTilePixels(int[] pixels, Rectangle newRect, byte[] bpixels)	encode the tile into bpixels and return the byte size (uncompressed packing algorithm).
void	register()	Registration method.

Methods inherited from class org.libtiff.jai.codec.XTIFFTileCodecImpl

create, create, decode, decodeColor, decodeColor, decodeColor, decodeColor, decodeTilePixels, encode, getCompressedTileSize, getCompression, getLongField, getTilePixels, initialize, initialize, initialize, initializeDecoding, initializeEncoding, register, setTilePixels, setupBufferForDecoding, setupBufferForEncoding, setupSourceImage, unpackShorts

Methods inherited from class java.lang.Object

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

Constructor Detail

XTIFFPackTileCodec

public XTIFFPackTileCodec()

Method Detail

create

public XTIFFTileCodec create()

Description copied from class: XTIFFTileCodecImpl

Implement this to return the corresponding empty codec object.

Specified by:

create in class XTIFFTileCodecImpl

canEncode

public boolean canEncode()

Description copied from class: XTIFFTileCodecImpl

Indicate whether this codec can encode data. Override to return true only if your codec implments encoding.

Overrides:

canEncode in class XTIFFTileCodecImpl

register

public void register()

Description copied from class: XTIFFTileCodecImpl

Registration method. Must be implemented by the extended class to register itself with the XTIFFDirectory for all compression codes it supports (e.g Fax codec supports 3 codes).

Specified by:

register in interface XTIFFTileCodec

Specified by:

register in class XTIFFTileCodecImpl

See Also:

XTIFFDirectory

encodeTilePixels

public int encodeTilePixels(int[] pixels,
                            Rectangle newRect,
                            byte[] bpixels)

encode the tile into bpixels and return the byte size (uncompressed packing algorithm). The padding has already been done, so we may safely assume that pixels is exactly rows by cols by numBands ints.

Overrides:

encodeTilePixels in class XTIFFTileCodecImpl

Parameters:

pixels - input pixels

newRect - the array dimensions of samples

bpixels - the target array of compressed byte data

decodeTilePixels

public void decodeTilePixels(byte[] input,
                             Rectangle newRect,
                             byte[] bdata)

Decode a rectangle of pixels

Specified by:

decodeTilePixels in class XTIFFTileCodecImpl

Parameters:

input - the byte array of compressed input data

newRect - the rectangular shape of the target pixels

bdata - the target decompressed pixels.

decodeTilePixels

public void decodeTilePixels(byte[] input,
                             Rectangle newRect,
                             short[] sdata)

Decode a rectangle of pixels

Specified by:

decodeTilePixels in class XTIFFTileCodecImpl

Parameters:

input - the byte array of compressed input data

newRect - the rectangular shape of the target pixels

sdata - the target decompressed pixels.