it.geosolutions.imageioimpl.plugins.tiff
Class TIFFLZWCompressor

Object
  extended by TIFFCompressor
      extended by TIFFLZWCompressor

public class TIFFLZWCompressor
extends TIFFCompressor

LZW Compressor.


Field Summary
 
Fields inherited from class TIFFCompressor
compressionTagValue, compressionType, isCompressionLossless, metadata, stream, writer
 
Constructor Summary
TIFFLZWCompressor(int predictorValue)
           
 
Method Summary
 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.
 void setStream(ImageOutputStream stream)
          Sets the ImageOutputStream to be written.
 
Methods inherited from class TIFFCompressor
getCompressionTagValue, getCompressionType, getMetadata, getStream, getWriter, isCompressionLossless, setMetadata, setWriter
 
Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TIFFLZWCompressor

public TIFFLZWCompressor(int predictorValue)
Method Detail

setStream

public void setStream(ImageOutputStream stream)
Description copied from class: TIFFCompressor
Sets the ImageOutputStream to be written.

Overrides:
setStream in class TIFFCompressor
Parameters:
stream - an ImageOutputStream to be written.
See Also:
TIFFCompressor.getStream()

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.


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