JIU 0.14.3

net.sourceforge.jiu.codecs.tiff
Class TIFFDecoderDeflated

java.lang.Object
  extended by net.sourceforge.jiu.codecs.tiff.TIFFDecoder
      extended by net.sourceforge.jiu.codecs.tiff.TIFFDecoderDeflated

public class TIFFDecoderDeflated
extends TIFFDecoder

A TIFF decoder for files compressed with the Deflated method. This compression algorithm has the values 31946 (TIFFConstants.COMPRESSION_DEFLATED_INOFFICIAL) and 8 (TIFFConstants.COMPRESSION_DEFLATED_OFFICIAL) in the compression tag of an image file directory. All types of image data can be compressed with this method.

This decoder makes use of the package java.util.zip which comes with an Inflater class that does most of the work. All the decoder has to do is feed the Inflater object with compressed data from the input file and give decompressed data received from the Inflater to the putBytes method.

Since:
0.9.0
Author:
Marco Schmidt

Constructor Summary
TIFFDecoderDeflated()
           
 
Method Summary
 void decode()
          Decode data from input and write the decompressed pixel data to the image associated with this decoder.
 Integer[] getCompressionTypes()
          Returns an array with Integer values of all compression types supported by this decoder (see the COMPRESSION_xyz constants in TIFFConstants.
 void initialize()
          Check if all necessary parameters have been given to this decoder and initialize several internal fields from them.
 
Methods inherited from class net.sourceforge.jiu.codecs.tiff.TIFFDecoder
getBytesPerRow, getCodec, getImageFileDirectory, getInput, getTileIndex, getX1, getX2, getY1, getY2, putBytes, setCodec, setImageFileDirectory, setTileIndex
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

TIFFDecoderDeflated

public TIFFDecoderDeflated()
Method Detail

decode

public void decode()
            throws InvalidFileStructureException,
                   IOException
Description copied from class: TIFFDecoder
Decode data from input and write the decompressed pixel data to the image associated with this decoder. Child classes must override this method to implement the decoding for a particular compression type.

Specified by:
decode in class TIFFDecoder
Throws:
InvalidFileStructureException
IOException

getCompressionTypes

public Integer[] getCompressionTypes()
Description copied from class: TIFFDecoder
Returns an array with Integer values of all compression types supported by this decoder (see the COMPRESSION_xyz constants in TIFFConstants. Normally, this is only one value, but some compression types got assigned more than one constant (e.g. deflated). Also, a decoder could be capable of dealing with more than one type of compression if the compression types are similar enough to justify that. However, typically a decoder can only deal with one type of compression.

Specified by:
getCompressionTypes in class TIFFDecoder
Returns:
array with Integer objects of all TIFF compression constants supported by this decoder

initialize

public void initialize()
                throws IOException,
                       MissingParameterException
Description copied from class: TIFFDecoder
Check if all necessary parameters have been given to this decoder and initialize several internal fields from them. Required parameters are a TIFFCodec object, a TIFFImageFileDirectory object and a tile index.

Overrides:
initialize in class TIFFDecoder
Throws:
IOException
MissingParameterException

JIU 0.14.3

Copyright © 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Marco Schmidt