com.sun.media.imageioimpl.plugins.tiff

Class TIFFPackBitsCompressor

java.lang.Object

com.sun.media.imageio.plugins.tiff.TIFFCompressor

com.sun.media.imageioimpl.plugins.tiff.TIFFPackBitsCompressor

public class TIFFPackBitsCompressor
extends TIFFCompressor

Field Summary

Fields inherited from class com.sun.media.imageio.plugins.tiff.TIFFCompressor

compressionTagValue, compressionType, isCompressionLossless, metadata, stream, writer

Constructor Summary

Constructors

Constructor and Description
TIFFPackBitsCompressor()

Method Summary

Modifier and Type	Method and Description
int	encode(byte[] b, int off, int width, int height, int[] bitsPerSample, int scanlineStride) Encodes the supplied image data, writing to the currently set ImageOutputStream.
private static int	packBits(byte[] input, int inOffset, int inCount, byte[] output, int outOffset) Performs PackBits compression for a single buffer of data.

Methods inherited from class com.sun.media.imageio.plugins.tiff.TIFFCompressor

getCompressionTagValue, getCompressionType, getMetadata, getStream, getWriter, isCompressionLossless, setMetadata, setStream, setWriter

Methods inherited from class java.lang.Object

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

Constructor Detail

TIFFPackBitsCompressor

public TIFFPackBitsCompressor()

Method Detail

packBits

private static int packBits(byte[] input,
                            int inOffset,
                            int inCount,
                            byte[] output,
                            int outOffset)

Performs PackBits compression for a single buffer of data. This should be called for each row of each tile. The returned value is the offset into the output buffer after compression.

encode

public int encode(byte[] b,
                  int off,
                  int width,
                  int height,
                  int[] bitsPerSample,
                  int scanlineStride)
           throws IOException

Description copied from class: TIFFCompressor

Encodes the supplied image data, writing to the currently set ImageOutputStream.

Specified by:

encode in class TIFFCompressor

Parameters:

b - an array of bytes containing the packed but uncompressed image data.

off - the starting offset of the data to be written in the array b.

width - the width of the rectangle of pixels to be written.

height - the height of the rectangle of pixels to be written.

bitsPerSample - an array of ints indicting the number of bits used to represent each image sample within a pixel.

scanlineStride - the number of bytes separating each row of the input data.

Returns:

the number of bytes written.

Throws:

IOException - if the supplied data cannot be encoded by this TIFFCompressor, or if any I/O error occurs during writing.