Package nom.tam.image.compression.tile

Class TileCompressor

java.lang.Object

nom.tam.image.tile.operation.AbstractTileOperation

nom.tam.image.compression.tile.TileCompressor

All Implemented Interfaces:

Runnable, ITileOperation

public class TileCompressor
extends AbstractTileOperation

(for internal use) A parallel operation for compressing a specific image or binary table tile. Each instance will be processed in a single thread, but operations on separate tiles can be (and will be) processed in parallel.

See Also:

• TileDecompressor

Field Summary

Fields

Modifier and Type	Field	Description
protected ByteBuffer	compressedData
protected int	compressedOffset
protected nom.tam.image.compression.tile.TileCompressionType	compressionType
protected ICompressOption	tileOptions

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TileCompressor(TiledImageCompressionOperation array, int tileIndex, TileArea area)	Creates a new tile compressor for a specific tile in the image.

Method Summary

Modifier and Type	Method	Description
protected NullPixelMaskPreserver	createImageNullPixelMask(ImageNullPixelMask imageNullPixelMask)
protected void	forceNoLoss(boolean value)	should the data of this tile be forced to case no data loss.
protected byte[]	getCompressedData()
protected ByteBuffer	getCompressedWholeArea()
protected nom.tam.image.compression.tile.TileCompressionType	getCompressionType()
protected ICompressorControl	getCompressorControl()
protected ICompressorControl	getGzipCompressorControl()
protected nom.tam.image.compression.tile.TileCompressionOperation	initTileOptions()
void	run()
protected nom.tam.image.compression.tile.TileCompressionOperation	setCompressed(Object data, nom.tam.image.compression.tile.TileCompressionType type)
protected nom.tam.image.compression.tile.TileCompressionOperation	setCompressedOffset(int value)
nom.tam.image.compression.tile.TileCompressionOperation	setDimensions(int dataOffset, int width, int height)	Specifies the location of the tile in the serialized buffer.
protected void	setWholeImageCompressedBuffer(ByteBuffer compressed)	set the buffer that describes the whole compressed image and let the tile create a slice of it from the position where the tile starts in the whole image.
String	toString()

Methods inherited from class nom.tam.image.tile.operation.AbstractTileOperation

execute, getArea, getBaseType, getPixelSize, getPreviousTileOperation, getTileBuffer, getTiledImageOperation, getTileIndex, setTileBuffer, setWholeImageBuffer, waitForResult

Methods inherited from class java.lang.Object

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

Methods inherited from interface nom.tam.image.tile.operation.ITileOperation

waitForResult

Field Details

compressedData

protected ByteBuffer compressedData

compressedOffset

protected int compressedOffset

compressionType

protected nom.tam.image.compression.tile.TileCompressionType compressionType

tileOptions

protected ICompressOption tileOptions

Constructor Details

TileCompressor

protected TileCompressor(TiledImageCompressionOperation array,
 int tileIndex,
 TileArea area)

Creates a new tile compressor for a specific tile in the image.

Parameters:

array - the class that handles the compression of the entire image via parallel processing tiles.

tileIndex - the sequential index of the specific tile

area - the location and size of the time in the complete image

Method Details

run

public void run()

createImageNullPixelMask

protected NullPixelMaskPreserver createImageNullPixelMask(ImageNullPixelMask imageNullPixelMask)

forceNoLoss

protected void forceNoLoss(boolean value)

should the data of this tile be forced to case no data loss. This information is not relevant in all cases that it is ignored by default.

Parameters:

value - the value to set.

toString

public String toString()

Overrides:

toString in class Object

getCompressedData

protected byte[] getCompressedData()

getCompressedWholeArea

protected ByteBuffer getCompressedWholeArea()

getCompressionType

protected nom.tam.image.compression.tile.TileCompressionType getCompressionType()

getCompressorControl

protected ICompressorControl getCompressorControl()

getGzipCompressorControl

protected ICompressorControl getGzipCompressorControl()

initTileOptions

protected nom.tam.image.compression.tile.TileCompressionOperation initTileOptions()

setCompressed

protected nom.tam.image.compression.tile.TileCompressionOperation setCompressed(Object data,
 nom.tam.image.compression.tile.TileCompressionType type)

setCompressedOffset

protected nom.tam.image.compression.tile.TileCompressionOperation setCompressedOffset(int value)

setDimensions

public nom.tam.image.compression.tile.TileCompressionOperation setDimensions(int dataOffset,
 int width,
 int height)

Description copied from interface: ITileOperation

Specifies the location of the tile in the serialized buffer.

Specified by:

setDimensions in interface ITileOperation

Overrides:

setDimensions in class AbstractTileOperation

Parameters:

dataOffset - the byte offset at which the tile data begins.

width - the width of the tile in pixels.

height - the tile height in pixels.

Returns:

itself.

setWholeImageCompressedBuffer

protected void setWholeImageCompressedBuffer(ByteBuffer compressed)

set the buffer that describes the whole compressed image and let the tile create a slice of it from the position where the tile starts in the whole image. Attention this method is not thread-safe because it changes the position of the buffer parameter. This buffer is just as big as the image buffer but will be reduced to the needed size as a last step of the Compression.

Parameters:

compressed - the buffer that describes the whole image.