Class RenderableImageProducer

java.lang.Object

java.awt.image.renderable.RenderableImageProducer

All Implemented Interfaces:

ImageProducer, Runnable

public class RenderableImageProducer
extends Object
implements ImageProducer, Runnable

An adapter class that implements ImageProducer to allow the asynchronous production of a RenderableImage. The size of the ImageConsumer is determined by the scale factor of the usr2dev transform in the RenderContext. If the RenderContext is null, the default rendering of the RenderableImage is used. This class implements an asynchronous production that produces the image in one thread at one resolution. This class may be subclassed to implement versions that will render the image using several threads. These threads could render either the same image at progressively better quality, or different sections of the image at a single resolution.

Constructor Summary

Constructors

Constructor	Description
RenderableImageProducer(RenderableImage rdblImage, RenderContext rc)	Constructs a new RenderableImageProducer from a RenderableImage and a RenderContext.

Method Summary

Modifier and Type	Method	Description
void	addConsumer(ImageConsumer ic)	Adds an ImageConsumer to the list of consumers interested in data for this image.
boolean	isConsumer(ImageConsumer ic)	Determine if an ImageConsumer is on the list of consumers currently interested in data for this image.
void	removeConsumer(ImageConsumer ic)	Remove 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	run()	The runnable method for this class.
void	setRenderContext(RenderContext rc)	Sets a new RenderContext to use for the next startProduction() call.
void	startProduction(ImageConsumer ic)	Adds an ImageConsumer to the list of consumers interested in data for this image, and immediately starts delivery of the image data through the ImageConsumer interface.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
String	toString()	Returns a string representation of the object.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

RenderableImageProducer

public RenderableImageProducer(RenderableImage rdblImage,
 RenderContext rc)

Constructs a new RenderableImageProducer from a RenderableImage and a RenderContext.

Parameters:

rdblImage - the RenderableImage to be rendered.

rc - the RenderContext to use for producing the pixels.

Method Details

setRenderContext

public void setRenderContext(RenderContext rc)

Sets a new RenderContext to use for the next startProduction() call.

Parameters:

rc - the new RenderContext.

addConsumer

public void addConsumer(ImageConsumer ic)

Adds an ImageConsumer to the list of consumers interested in data for this image.

Specified by:

addConsumer in interface ImageProducer

Parameters:

ic - an ImageConsumer to be added to the interest list.

See Also:

• ImageProducer.startProduction(ImageConsumer)

isConsumer

public boolean isConsumer(ImageConsumer ic)

Determine if an ImageConsumer is on the list of consumers currently interested in data for this image.

Specified by:

isConsumer in interface ImageProducer

Parameters:

ic - the ImageConsumer to be checked.

Returns:

true if the ImageConsumer is on the list; false otherwise.

removeConsumer

public void removeConsumer(ImageConsumer ic)

Remove an ImageConsumer from the list of consumers interested in data for this image.

Specified by:

removeConsumer in interface ImageProducer

Parameters:

ic - the ImageConsumer to be removed.

startProduction

public void startProduction(ImageConsumer ic)

Adds an ImageConsumer to the list of consumers interested in data for this image, and immediately starts delivery of the image data through the ImageConsumer interface.

Specified by:

startProduction in interface ImageProducer

Parameters:

ic - the ImageConsumer to be added to the list of consumers.

See Also:

• ImageProducer.addConsumer(ImageConsumer)

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.

Specified by:

requestTopDownLeftRightResend in interface ImageProducer

Parameters:

ic - the ImageConsumer requesting the resend.

See Also:

• ImageConsumer.setHints(int)

run

public void run()

The runnable method for this class. This will produce an image using the current RenderableImage and RenderContext and send it to all the ImageConsumer currently registered with this class.

Specified by:

run in interface Runnable