FilteredImageSource (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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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));

See Also:: ImageProducer

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

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