net.sourceforge.jiu.codecs.tiff
Class TIFFDecoderDeflated
public class TIFFDecoderDeflated
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.
bottomRow , bufferIndex , codec , currentRow , ifd , leftColumn , processedTileRows , rightColumn , rowBuffer , tileIndex , topRow , totalTileRows |
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.
|
decode , getBytesPerRow , getCodec , getCompressionTypes , getImageFileDirectory , getInput , getTileIndex , getX1 , getX2 , getY1 , getY2 , initialize , putBytes , setCodec , setImageFileDirectory , setTileIndex , storeRow |
compressedSize
private int compressedSize
decode
public void decode()
throws InvalidFileStructureException,
IOException
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.
- decode in interface TIFFDecoder
getCompressionTypes
public Integer[] getCompressionTypes()
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.
- getCompressionTypes in interface TIFFDecoder
- array with Integer objects of all TIFF compression constants supported by this decoder
initialize
public void initialize()
throws IOException,
MissingParameterException
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.
- initialize in interface TIFFDecoder