java.awt.image
Class FilteredImageSource

java.lang.Object
  java.awt.image.FilteredImageSource

All Implemented Interfaces:

ImageProducer

public class FilteredImageSource

extends Object

implements ImageProducer

This class is an implementation of the ImageProducer interface which takes an existing image and a filter object and uses them to produce image data for a new filtered version of the original image. Here is an example which filters an image by swapping the red and blue compents:

 
	Image src = getImage("doc:///demo/images/duke/T1.gif");
	ImageFilter colorfilter = new RedBlueSwapFilter();
	Image img = createImage(new FilteredImageSource(src.getSource(),
							colorfilter));
 
 

Author:

Jim Graham

See Also:

ImageProducer

Field Summary

(package private) ImageFilter	filter
private Hashtable	proxies
(package private) ImageProducer	src

Constructor Summary

FilteredImageSource(ImageProducer orig, ImageFilter imgf)
Constructs an ImageProducer object from an existing ImageProducer and a filter object.

Method Summary

void	addConsumer(ImageConsumer ic) Adds an ImageConsumer to the list of consumers interested in data for this image.
boolean	isConsumer(ImageConsumer ic) Determines whether an ImageConsumer is on the list of consumers currently interested in data for this image.
void	removeConsumer(ImageConsumer ic) Removes an ImageConsumer from the list of consumers interested in data for this image.
void	requestTopDownLeftRightResend(ImageConsumer ic) Requests that a given ImageConsumer have the image data delivered one more time in top-down, left-right order.
void	startProduction(ImageConsumer ic) Adds an ImageConsumer to the list of consumers interested in data for this image, and immediately starts delivery of the image data through the ImageConsumer interface.

Methods inherited from class java.lang.Object

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

Field Detail

src

ImageProducer src

filter

ImageFilter filter

proxies

private Hashtable proxies

Constructor Detail

FilteredImageSource

public FilteredImageSource(ImageProducer orig,
                           ImageFilter imgf)

Constructs an ImageProducer object from an existing ImageProducer and a filter object.

Parameters:

orig - the specified ImageProducer

imgf - the specified ImageFilter

See Also:

ImageFilter, Component.createImage(java.awt.image.ImageProducer)

Method Detail

addConsumer

public void addConsumer(ImageConsumer ic)

Adds an ImageConsumer to the list of consumers interested in data for this image.

Specified by:

addConsumer in interface ImageProducer

Parameters:

ic - the specified ImageConsumer

See Also:

ImageConsumer

isConsumer

public boolean isConsumer(ImageConsumer ic)

Determines whether an ImageConsumer is on the list of consumers currently interested in data for this image.

Specified by:

isConsumer in interface ImageProducer

Parameters:

ic - the specified ImageConsumer

Returns:

true if the ImageConsumer is on the list; false otherwise

See Also:

ImageConsumer

removeConsumer

public void removeConsumer(ImageConsumer ic)

Removes an ImageConsumer from the list of consumers interested in data for this image.

Specified by:

removeConsumer in interface ImageProducer

Parameters:

ic - the specified ImageConsumer

See Also:

ImageConsumer

startProduction

public void startProduction(ImageConsumer ic)

Adds an ImageConsumer to the list of consumers interested in data for this image, and immediately starts delivery of the image data through the ImageConsumer interface.

Specified by:

startProduction in interface ImageProducer

Parameters:

ic - the specified ImageConsumer

See Also:

ImageConsumer

requestTopDownLeftRightResend

public void requestTopDownLeftRightResend(ImageConsumer ic)

Requests that a given ImageConsumer have the image data delivered one more time in top-down, left-right order. The request is handed to the ImageFilter for further processing, since the ability to preserve the pixel ordering depends on the filter.

Specified by:

requestTopDownLeftRightResend in interface ImageProducer

Parameters:

ic - the specified ImageConsumer

See Also:

ImageConsumer