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()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
int	hashCode()	Answers an integer hash code for the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
String	toString()	Answers a string containing a concise, human-readable description of the receiver.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

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