- All Implemented Interfaces:
ImageProducer
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));
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Constructor Summary
ConstructorsConstructorDescriptionFilteredImageSource(ImageProducer orig, ImageFilter imgf) Constructs an ImageProducer object from an existing ImageProducer and a filter object. -
Method Summary
Modifier and TypeMethodDescriptionvoidAdds the specifiedImageConsumerto the list of consumers interested in data for the filtered image.booleanDetermines whether an ImageConsumer is on the list of consumers currently interested in data for this image.voidRemoves an ImageConsumer from the list of consumers interested in data for this image.voidRequests that a given ImageConsumer have the image data delivered one more time in top-down, left-right order.voidStarts production of the filtered image.
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Constructor Details
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FilteredImageSource
Constructs an ImageProducer object from an existing ImageProducer and a filter object.- Parameters:
orig- the specifiedImageProducerimgf- the specifiedImageFilter- See Also:
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Method Details
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addConsumer
Adds the specifiedImageConsumerto the list of consumers interested in data for the filtered image. An instance of the originalImageFilteris created (using the filter'sgetFilterInstancemethod) to manipulate the image data for the specifiedImageConsumer. The newly created filter instance is then passed to theaddConsumermethod of the originalImageProducer.This method is public as a side effect of this class implementing the
ImageProducerinterface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
addConsumerin interfaceImageProducer- Parameters:
ic- the consumer for the filtered image- See Also:
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isConsumer
Determines whether an ImageConsumer is on the list of consumers currently interested in data for this image.This method is public as a side effect of this class implementing the
ImageProducerinterface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
isConsumerin interfaceImageProducer- Parameters:
ic- the specifiedImageConsumer- Returns:
- true if the ImageConsumer is on the list; false otherwise
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removeConsumer
Removes an ImageConsumer from the list of consumers interested in data for this image.This method is public as a side effect of this class implementing the
ImageProducerinterface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
removeConsumerin interfaceImageProducer- Parameters:
ic- the specifiedImageConsumer- See Also:
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startProduction
Starts production of the filtered image. If the specifiedImageConsumerisn't already a consumer of the filtered image, an instance of the originalImageFilteris created (using the filter'sgetFilterInstancemethod) to manipulate the image data for theImageConsumer. The filter instance for theImageConsumeris then passed to thestartProductionmethod of the originalImageProducer.This method is public as a side effect of this class implementing the
ImageProducerinterface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
startProductionin interfaceImageProducer- Parameters:
ic- the consumer for the filtered image- See Also:
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requestTopDownLeftRightResend
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.This method is public as a side effect of this class implementing the
ImageProducerinterface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
requestTopDownLeftRightResendin interfaceImageProducer- Parameters:
ic- the specifiedImageConsumer- See Also:
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