Package org.apache.sis.image

Class PixelIterator.IntWindow

java.lang.Object

org.apache.sis.image.PixelIterator.Window<IntBuffer>

org.apache.sis.image.PixelIterator.IntWindow

Enclosing class:

PixelIterator

private final class PixelIterator.IntWindow
extends PixelIterator.Window<IntBuffer>

PixelIterator.Window implementation backed by an array of int[]. This is the most efficient Window because Java2D has many optimizations for images backed by integer values:

• Raster.getPixels(int, int, int, int, int[]) overridden in private subclasses.
• SampleModel.getPixels(int, int, int, int, int[], DataBuffer) overridden in public subclasses.

In particular we should not try to get the backing int[] array ourselves because it may cause Java2D to disable GPU accelerations on that raster.

Field Summary

Fields

Modifier and Type	Field	Description
private final int[]	data	Sample values in the window (data) and a temporary array (transfer).
private final int[]	transfer	Sample values in the window (data) and a temporary array (transfer).

Fields inherited from class org.apache.sis.image.PixelIterator.Window

DIRECT, TRANSFER, TRANSFER_FROM_OTHER, values

Constructor Summary

Constructors

Constructor	Description
IntWindow(int[] data, int[] transfer)	Creates a new window which will store the sample values in the given data array.

Method Summary

Modifier and Type	Method	Description
(package private) Object	getPixels(Raster raster, int subX, int subY, int subWidth, int subHeight, int mode)	Performs the transfer between the underlying raster and this window.
(package private) final PixelIterator	owner()	Returns the iterator that created this window.
void	update()	Updates this window with the sample values in the region starting at current iterator position.

Methods inherited from class org.apache.sis.image.PixelIterator.Window

getSize

Methods inherited from class java.lang.Object

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

Field Details

data

private final int[] data

Sample values in the window (data) and a temporary array (transfer). Those arrays are overwritten when update() is invoked.

transfer

private final int[] transfer

Sample values in the window (data) and a temporary array (transfer). Those arrays are overwritten when update() is invoked.

Constructor Details

IntWindow

IntWindow(int[] data,
 int[] transfer)

Creates a new window which will store the sample values in the given data array.

Method Details

owner

final PixelIterator owner()

Returns the iterator that created this window.

Specified by:

owner in class PixelIterator.Window<IntBuffer>

getPixels

Object getPixels(Raster raster,
 int subX,
 int subY,
 int subWidth,
 int subHeight,
 int mode)

Performs the transfer between the underlying raster and this window.

Specified by:

getPixels in class PixelIterator.Window<IntBuffer>

Parameters:

raster - the raster from which to get the pixel values.

subX - the X coordinate of the upper-left pixel location.

subY - the Y coordinate of the upper-left pixel location.

subWidth - width of the pixel rectangle.

subHeight - height of the pixel rectangle.

mode - one of PixelIterator.Window.DIRECT, PixelIterator.Window.TRANSFER or PixelIterator.Window.TRANSFER_FROM_OTHER.

Returns:

the array in which sample values have been stored.

update

public void update()

Updates this window with the sample values in the region starting at current iterator position. This method assumes that PixelIterator.next() or PixelIterator.moveTo(int,int) has been invoked.

Specified by:

update in class PixelIterator.Window<IntBuffer>