ImageProducer
public class FilteredImageSource extends Object implements 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));
Constructor | Description |
---|---|
FilteredImageSource |
Constructs an ImageProducer object from an existing ImageProducer and a filter object. |
Modifier and Type | Method | Description |
---|---|---|
void |
addConsumer |
Adds the specified ImageConsumer to the list of consumers interested in data for the filtered image. |
boolean |
isConsumer |
Determines whether an ImageConsumer is on the list of consumers currently interested in data for this image. |
void |
removeConsumer |
Removes an ImageConsumer from the list of consumers interested in data for this image. |
void |
requestTopDownLeftRightResend |
Requests that a given ImageConsumer have the image data delivered one more time in top-down, left-right order. |
void |
startProduction |
Starts production of the filtered image. |
public FilteredImageSource(ImageProducer orig, ImageFilter imgf)
orig
- the specified ImageProducer
imgf
- the specified ImageFilter
public void addConsumer(ImageConsumer ic)
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
. 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.
addConsumer
in interface ImageProducer
ic
- the consumer for the filtered imagepublic boolean isConsumer(ImageConsumer ic)
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.
isConsumer
in interface ImageProducer
ic
- the specified ImageConsumer
public void removeConsumer(ImageConsumer ic)
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.
removeConsumer
in interface ImageProducer
ic
- the specified ImageConsumer
public void startProduction(ImageConsumer ic)
ImageConsumer
isn't already a consumer of the filtered image, an instance of the original ImageFilter
is created (using the filter's getFilterInstance
method) to manipulate the image data for the ImageConsumer
. The filter instance for the ImageConsumer
is then passed to the startProduction
method of the original ImageProducer
. 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.
startProduction
in interface ImageProducer
ic
- the consumer for the filtered imagepublic void requestTopDownLeftRightResend(ImageConsumer ic)
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.
requestTopDownLeftRightResend
in interface ImageProducer
ic
- the specified ImageConsumer
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/image/FilteredImageSource.html