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. Furthermore, FilteredImageSource is safe for use by multiple threads. Here is an example which filters an image by swapping the red and blue components:

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

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 declared in 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.