Class Transferer.FloatToInteger

java.lang.Object

org.apache.sis.image.Transferer

org.apache.sis.image.Transferer.FloatToInteger

Direct Known Subclasses:

Transferer.FloatToByte, Transferer.FloatToShort, Transferer.FloatToUShort

Enclosing class:

Transferer

private static class Transferer.FloatToInteger
extends Transferer

Read float values from the source raster and write int values in a temporary buffer. The floating point values will be rounded and clamped to the range of the integer type. Note that we do not provide any direct version for integer types because direct access to DataBuffer array disable Java2D acceleration on video card.

Since:

1.1

Version:

1.1

Field Summary

Fields

Modifier and Type	Field	Description
protected float[]	buffer	Temporary buffer where to copy data and apply operation.
protected int[]	transfer	Temporary buffer where to round data before transfer to target raster.

Fields inherited from class Transferer

band, region, source, target

Constructor Summary

Constructors

Constructor	Description
FloatToInteger(Raster source, WritableRaster target, Rectangle aoi)	Creates a new instance for transferring data between the two specified rasters.

Method Summary

Modifier and Type	Method	Description
(package private) void	clamp(int length)	Clamps data to the range of target integer type.
(package private) final void	computeStrip(org.opengis.referencing.operation.MathTransform1D converter)	Copies source values in temporary buffer, applies conversion then copies to target.
(package private) final int	prepareTransferRegion()	Subdivides the region to process in smaller strips, for smaller buffer.

Methods inherited from class Transferer

compute, create, create, length

Methods inherited from class Object

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

Field Details

buffer

protected float[] buffer

Temporary buffer where to copy data and apply operation.

transfer

protected int[] transfer

Temporary buffer where to round data before transfer to target raster.

Constructor Details

FloatToInteger

FloatToInteger(Raster source,
 WritableRaster target,
 Rectangle aoi)

Creates a new instance for transferring data between the two specified rasters.

Method Details

prepareTransferRegion

final int prepareTransferRegion()

Subdivides the region to process in smaller strips, for smaller buffer.

Overrides:

prepareTransferRegion in class Transferer

Returns:

region.y + region.height.

See Also:

• ImageUtilities.prepareTransferRegion(Rectangle, int)

computeStrip

final void computeStrip(org.opengis.referencing.operation.MathTransform1D converter)
                 throws org.opengis.referencing.operation.TransformException

Copies source values in temporary buffer, applies conversion then copies to target.

Specified by:

computeStrip in class Transferer

Parameters:

converter - the operation to apply on sample values in current region and current band number.

Throws:

org.opengis.referencing.operation.TransformException - if an error occurred during calculation.

clamp

void clamp(int length)

Clamps data to the range of target integer type.