- java.lang.Object
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- java.awt.image.FilteredImageSource
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- 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
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Constructor Summary
Constructors Constructor and Description FilteredImageSource(ImageProducer orig, ImageFilter imgf)
Constructs an ImageProducer object from an existing ImageProducer and a filter object.
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Method Summary
Methods Modifier and Type Method and Description void
addConsumer(ImageConsumer ic)
Adds the specifiedImageConsumer
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.
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Constructor Detail
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FilteredImageSource
public FilteredImageSource(ImageProducer orig, ImageFilter imgf)
Constructs an ImageProducer object from an existing ImageProducer and a filter object.- Parameters:
orig
- the specifiedImageProducer
imgf
- the specifiedImageFilter
- See Also:
ImageFilter
,Component.createImage(java.awt.image.ImageProducer)
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Method Detail
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addConsumer
public void addConsumer(ImageConsumer ic)
Adds the specifiedImageConsumer
to the list of consumers interested in data for the filtered image. An instance of the originalImageFilter
is created (using the filter'sgetFilterInstance
method) to manipulate the image data for the specifiedImageConsumer
. The newly created filter instance is then passed to theaddConsumer
method of the originalImageProducer
.This method is public as a side effect of this class implementing the
ImageProducer
interface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
addConsumer
in interfaceImageProducer
- Parameters:
ic
- the consumer for the filtered image- 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.This method is public as a side effect of this class implementing the
ImageProducer
interface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
isConsumer
in interfaceImageProducer
- Parameters:
ic
- the specifiedImageConsumer
- Returns:
- true if the ImageConsumer is on the list; false otherwise
- See Also:
ImageConsumer
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removeConsumer
public void removeConsumer(ImageConsumer ic)
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
ImageProducer
interface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
removeConsumer
in interfaceImageProducer
- Parameters:
ic
- the specifiedImageConsumer
- See Also:
ImageConsumer
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startProduction
public void startProduction(ImageConsumer ic)
Starts production of the filtered image. If the specifiedImageConsumer
isn't already a consumer of the filtered image, an instance of the originalImageFilter
is created (using the filter'sgetFilterInstance
method) to manipulate the image data for theImageConsumer
. The filter instance for theImageConsumer
is then passed to thestartProduction
method of the originalImageProducer
.This method is public as a side effect of this class implementing the
ImageProducer
interface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
startProduction
in interfaceImageProducer
- Parameters:
ic
- the consumer for the filtered image- See Also:
ImageConsumer
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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.This method is public as a side effect of this class implementing the
ImageProducer
interface. It should not be called from user code, and its behavior if called from user code is unspecified.- Specified by:
requestTopDownLeftRightResend
in interfaceImageProducer
- Parameters:
ic
- the specifiedImageConsumer
- See Also:
ImageConsumer
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Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-java/awt/image/filteredimagesource.html/.html
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