visual.statik.sampled

Class IdentityOp

java.lang.Object

visual.statik.sampled.IdentityOp

All Implemented Interfaces:

java.awt.image.BufferedImageOp

Direct Known Subclasses:

GrayExceptOp

public class IdentityOp
extends java.lang.Object
implements java.awt.image.BufferedImageOp

A BufferedImageOp that returns (a copy of) the source image unchanged. This class is unlikely to be used directly. However, it is convenient to extend this class when implementing other operations. In such cases, it is often only necessary to override the filter() method.

Version:

1.0

Author:

Prof. David Bernstein, James Madison University

See Also:

"The Design and Implementation of Multimedia Software © 2011"

Constructor Summary

Constructors

Constructor and Description
IdentityOp()

Method Summary

Modifier and Type	Method and Description
java.awt.image.BufferedImage	createCompatibleDestImage(java.awt.image.BufferedImage src, java.awt.image.ColorModel dstCM) Creates a zeroed destination image with the correct size and number of bands (required by BufferedImageOp).
java.awt.image.BufferedImage	filter(java.awt.image.BufferedImage src, java.awt.image.BufferedImage dst) In general, performs a single-input/single-output operation on a BufferedImage (required by BufferedImageOp).
java.awt.geom.Rectangle2D	getBounds2D(java.awt.image.BufferedImage src) Returns the bounding box of the filtered destination image (required by BufferedImageOp)
java.awt.geom.Point2D	getPoint2D(java.awt.geom.Point2D srcPt, java.awt.geom.Point2D dstPt) Returns the location of the corresponding destination point given a point in the source image (required by BufferedImageOp).
java.awt.RenderingHints	getRenderingHints() Return the rendering hints for this operation (required by BufferedImageOp).

Methods inherited from class java.lang.Object

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

Constructor Detail

IdentityOp

public IdentityOp()

Method Detail

createCompatibleDestImage

public java.awt.image.BufferedImage createCompatibleDestImage(java.awt.image.BufferedImage src,
                                                              java.awt.image.ColorModel dstCM)

Creates a zeroed destination image with the correct size and number of bands (required by BufferedImageOp).

Specified by:

createCompatibleDestImage in interface java.awt.image.BufferedImageOp

Parameters:

src - The source image

dstCM - The ColorModel to be used in the created image

Returns:

The BufferedImage

filter

public java.awt.image.BufferedImage filter(java.awt.image.BufferedImage src,
                                           java.awt.image.BufferedImage dst)

In general, performs a single-input/single-output operation on a BufferedImage (required by BufferedImageOp).

If the destination image is null, a BufferedImage with an appropriate ColorModel is created.

In this case, this method simply "returns" a (copy of) the source.

Specified by:

filter in interface java.awt.image.BufferedImageOp

Parameters:

src - The source image

dst - An empty image in which to tore the result (or null)

Returns:

The result

getBounds2D

public java.awt.geom.Rectangle2D getBounds2D(java.awt.image.BufferedImage src)

Returns the bounding box of the filtered destination image (required by BufferedImageOp)

Specified by:

getBounds2D in interface java.awt.image.BufferedImageOp

Parameters:

src - The source image

getPoint2D

public java.awt.geom.Point2D getPoint2D(java.awt.geom.Point2D srcPt,
                                        java.awt.geom.Point2D dstPt)

Returns the location of the corresponding destination point given a point in the source image (required by BufferedImageOp). If dstPt is specified, it is used to hold the return value.

Specified by:

getPoint2D in interface java.awt.image.BufferedImageOp

Parameters:

srcPt - The point in the source image

dstPt - The point in the destination image

Returns:

The location

getRenderingHints

public java.awt.RenderingHints getRenderingHints()

Return the rendering hints for this operation (required by BufferedImageOp). In this case, this method always returns null.

Specified by:

getRenderingHints in interface java.awt.image.BufferedImageOp

Returns:

null