Package nom.tam.image.tile.operation.buffer

Class TileBufferColumnBased

java.lang.Object

nom.tam.image.tile.operation.buffer.TileBuffer

nom.tam.image.tile.operation.buffer.TileBufferColumnBased

class TileBufferColumnBased
extends TileBuffer

This subclass of the row based view, will abstract the problems that occur when the tile does not spread over a whole row. in that case the buffer describing the image does not match the buffer describing the tile. That is why a temporary buffer is needed to make the buffer continuous.

Field Summary

Fields

Modifier and Type	Field	Description
private java.nio.Buffer	gapLessBuffer	the buffer representing the tile data gap less.
private int	imageWidth	the width of the image in pixels, that differs from the width of the tile.

Constructor Summary

Constructors

Constructor	Description
TileBufferColumnBased(PrimitiveType<java.nio.Buffer> baseType, int dataOffset, int imageWidth, int width, int height)

Method Summary

Modifier and Type	Method	Description
private void	createGapLessBuffer()	create the temporary buffer that contains no data gaps.
private void	desolveGapLessBuffer()	resolve the temporary buffer that contains no data gaps, and put the data back into the image buffer.
void	finish()	nothing to do in the normal case, overwrite this method if post processing is necessary.
java.nio.Buffer	getBuffer()
private int	getPixelSizeInData()
private PrimitiveType<java.nio.Buffer>	primitiveType()

Methods inherited from class nom.tam.image.tile.operation.buffer.TileBuffer

getBaseType, getHeight, getImageBuffer, getPixelSize, getWidth, setData

Methods inherited from class java.lang.Object

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

Field Detail

gapLessBuffer

private java.nio.Buffer gapLessBuffer

the buffer representing the tile data gap less. this will exist only between the first getBuffer() and the finish(). This way the memory used for the data copy is allocates as early as needed and freed as soon as possible.

imageWidth

private final int imageWidth

the width of the image in pixels, that differs from the width of the tile.

Constructor Detail

TileBufferColumnBased

TileBufferColumnBased(PrimitiveType<java.nio.Buffer> baseType,
                      int dataOffset,
                      int imageWidth,
                      int width,
                      int height)

Method Detail

finish

public void finish()

Description copied from class: TileBuffer

nothing to do in the normal case, overwrite this method if post processing is necessary.

Overrides:

finish in class TileBuffer

getBuffer

public java.nio.Buffer getBuffer()

Specified by:

getBuffer in class TileBuffer

createGapLessBuffer

private void createGapLessBuffer()

create the temporary buffer that contains no data gaps.

desolveGapLessBuffer

private void desolveGapLessBuffer()

resolve the temporary buffer that contains no data gaps, and put the data back into the image buffer.

getPixelSizeInData

private int getPixelSizeInData()

Returns:

size of the tile data inside the image data. normally tile-height*image-width but then the data block of the last tile would go over the image data limit.

primitiveType

private PrimitiveType<java.nio.Buffer> primitiveType()