it.geosolutions.imageioimpl.plugins.tiff
Class TIFFJPEGDecompressor

Object
  extended by TIFFDecompressor
      extended by TIFFJPEGDecompressor
Direct Known Subclasses:
TIFFOldJPEGDecompressor

public class TIFFJPEGDecompressor
extends TIFFDecompressor


Field Summary
protected static int EOI
           
protected  boolean hasJPEGTables
           
protected  ImageReadParam JPEGParam
           
protected  ImageReader JPEGReader
           
protected static int SOI
           
protected  byte[] tables
           
 
Fields inherited from class TIFFDecompressor
activeSrcHeight, activeSrcMinX, activeSrcMinY, activeSrcWidth, bitsPerSample, byteCount, colorConverter, colorMap, compression, destinationBands, dstHeight, dstMinX, dstMinY, dstWidth, dstXOffset, dstYOffset, extraSamples, image, metadata, offset, photometricInterpretation, planar, rawImage, reader, sampleFormat, samplesPerPixel, sourceBands, sourceXOffset, sourceYOffset, srcHeight, srcMinX, srcMinY, srcWidth, stream, subsampleX, subsampleY
 
Constructor Summary
TIFFJPEGDecompressor()
           
 
Method Summary
 void beginDecoding()
          This routine is called prior to a sequence of calls to the decode method, in order to allow any necessary tables or other structures to be initialized based on metadata values.
 void decodeRaw(byte[] b, int dstOffset, int bitsPerPixel, int scanlineStride)
          Decodes the source data into the provided byte array b, starting at the offset given by dstOffset.
protected  void finalize()
           
 
Methods inherited from class TIFFDecompressor
createRawImage, decode, decodeRaw, decodeRaw, decodeRaw, decodeRaw, getRawImageType, getRawImageTypeSpecifier, setActiveSrcHeight, setActiveSrcMinX, setActiveSrcMinY, setActiveSrcWidth, setBitsPerSample, setByteCount, setColorConverter, setColorMap, setCompression, setDestinationBands, setDstHeight, setDstMinX, setDstMinY, setDstWidth, setDstXOffset, setDstYOffset, setExtraSamples, setImage, setMetadata, setOffset, setPhotometricInterpretation, setPlanar, setReader, setSampleFormat, setSamplesPerPixel, setSourceBands, setSourceXOffset, setSourceYOffset, setSrcHeight, setSrcMinX, setSrcMinY, setSrcWidth, setStream, setSubsampleX, setSubsampleY
 
Methods inherited from class Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

SOI

protected static final int SOI
See Also:
Constant Field Values

EOI

protected static final int EOI
See Also:
Constant Field Values

JPEGReader

protected ImageReader JPEGReader

JPEGParam

protected ImageReadParam JPEGParam

hasJPEGTables

protected boolean hasJPEGTables

tables

protected byte[] tables
Constructor Detail

TIFFJPEGDecompressor

public TIFFJPEGDecompressor()
Method Detail

beginDecoding

public void beginDecoding()
Description copied from class: TIFFDecompressor
This routine is called prior to a sequence of calls to the decode method, in order to allow any necessary tables or other structures to be initialized based on metadata values. This routine is guaranteed to be called any time the metadata values have changed.

The default implementation computes tables used by the decode method to rescale components to different bit depths. Thus, if this method is overridden, it is important for the subclass method to call super(), unless it overrides decode as well.

Overrides:
beginDecoding in class TIFFDecompressor

decodeRaw

public void decodeRaw(byte[] b,
                      int dstOffset,
                      int bitsPerPixel,
                      int scanlineStride)
               throws IOException
Description copied from class: TIFFDecompressor
Decodes the source data into the provided byte array b, starting at the offset given by dstOffset. Each pixel occupies bitsPerPixel bits, with no padding between pixels. Scanlines are separated by scanlineStride bytes.

Specified by:
decodeRaw in class TIFFDecompressor
Parameters:
b - a byte array to be written.
dstOffset - the starting offset in b to be written.
bitsPerPixel - the number of bits for each pixel.
scanlineStride - the number of bytes to advance between that starting pixels of each scanline.
Throws:
IOException - if an error occurs reading from the source ImageInputStream.

finalize

protected void finalize()
                 throws Throwable
Overrides:
finalize in class Object
Throws:
Throwable


Copyright © 2006-2010 GeoSolutions. All Rights Reserved.