FilteredImageSource (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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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
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 the specified ImageConsumer to the list of consumers interested in data for the filtered 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)
          Starts production of the filtered image.

Methods inherited from class java.lang.Object

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

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 the specified `ImageConsumer` to the list of consumers interested in data for the filtered 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)` Starts production of the filtered image.

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 the specified ImageConsumer to the list of consumers interested in data for the filtered image. An instance of the original ImageFilter is created (using the filter's getFilterInstance method) to manipulate the image data for the specified ImageConsumer. The newly created filter instance is then passed to the addConsumer method of the original ImageProducer.