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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.awt.image 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   java.awt.image.ImageFilter

All known Subclasses:   java.awt.image.ReplicateScaleFilter,  java.awt.image.CropImageFilter,  java.awt.image.RGBImageFilter,
ImageFilter
public class ImageFilter implements ImageConsumer,Cloneable(Code)
This class implements a filter for the set of interface methods that are used to deliver data from an ImageProducer to an ImageConsumer. It is meant to be used in conjunction with a FilteredImageSource object to produce filtered versions of existing images. It is a base class that provides the calls needed to implement a "Null filter" which has no effect on the data being passed through. Filters should subclass this class and override the methods which deal with the data that needs to be filtered and modify it as necessary.
See Also:   FilteredImageSource
See Also:   ImageConsumer
version:
   1.22 08/19/02
author:
   Jim Graham


Field Summary
protected  ImageConsumerconsumer
     The consumer of the particular image data stream for which this instance of the ImageFilter is filtering data.


Method Summary
public  Objectclone()
     Clones this object.
public  ImageFiltergetFilterInstance(ImageConsumer ic)
     Returns a unique instance of an ImageFilter object which will actually perform the filtering for the specified ImageConsumer.
public  voidimageComplete(int status)
     Filters the information provided in the imageComplete method of the ImageConsumer interface.
public  voidresendTopDownLeftRight(ImageProducer ip)
     Responds to a request for a TopDownLeftRight (TDLR) ordered resend of the pixel data from an ImageConsumer. The ImageFilter can respond to this request in one of three ways.
  1. If the filter can determine that it will forward the pixels in TDLR order if its upstream producer object sends them in TDLR order, then the request is automatically forwarded by default to the indicated ImageProducer using this filter as the requesting ImageConsumer, so no override is necessary.
  2. If the filter can resend the pixels in the right order on its own (presumably because the generated pixels have been saved in some sort of buffer), then it can override this method and simply resend the pixels in TDLR order as specified in the ImageProducer API.
public  voidsetColorModel(ColorModel model)
     Filter the information provided in the setColorModel method of the ImageConsumer interface.
public  voidsetDimensions(int width, int height)
     Filters the information provided in the setDimensions method of the ImageConsumer interface.
public  voidsetHints(int hints)
     Filters the information provided in the setHints method of the ImageConsumer interface.
public  voidsetPixels(int x, int y, int w, int h, ColorModel model, byte pixels, int off, int scansize)
     Filters the information provided in the setPixels method of the ImageConsumer interface which takes an array of bytes.
public  voidsetPixels(int x, int y, int w, int h, ColorModel model, int pixels, int off, int scansize)
     Filters the information provided in the setPixels method of the ImageConsumer interface which takes an array of integers.
public  voidsetProperties(Hashtable props)
     Passes the properties from the source object along after adding a property indicating the stream of filters it has been run through.

Field Detail
consumer
protected ImageConsumer consumer(Code)
The consumer of the particular image data stream for which this instance of the ImageFilter is filtering data. It is not initialized during the constructor, but rather during the getFilterInstance() method call when the FilteredImageSource is creating a unique instance of this object for a particular image data stream.
See Also:   ImageFilter.getFilterInstance
See Also:   ImageConsumer





Method Detail
clone
public Object clone()(Code)
Clones this object.



getFilterInstance
public ImageFilter getFilterInstance(ImageConsumer ic)(Code)
Returns a unique instance of an ImageFilter object which will actually perform the filtering for the specified ImageConsumer. The default implementation just clones this object.



imageComplete
public void imageComplete(int status)(Code)
Filters the information provided in the imageComplete method of the ImageConsumer interface.
See Also:   ImageConsumer.imageComplete



resendTopDownLeftRight
public void resendTopDownLeftRight(ImageProducer ip)(Code)
Responds to a request for a TopDownLeftRight (TDLR) ordered resend of the pixel data from an ImageConsumer. The ImageFilter can respond to this request in one of three ways.
  1. If the filter can determine that it will forward the pixels in TDLR order if its upstream producer object sends them in TDLR order, then the request is automatically forwarded by default to the indicated ImageProducer using this filter as the requesting ImageConsumer, so no override is necessary.
  2. If the filter can resend the pixels in the right order on its own (presumably because the generated pixels have been saved in some sort of buffer), then it can override this method and simply resend the pixels in TDLR order as specified in the ImageProducer API.
  3. If the filter simply returns from this method then the request will be ignored and no resend will occur.

See Also:   ImageProducer.requestTopDownLeftRightResend
Parameters:
  ip - The ImageProducer that is feeding this instance ofthe filter - also the ImageProducer that the request should beforwarded to if necessary.



setColorModel
public void setColorModel(ColorModel model)(Code)
Filter the information provided in the setColorModel method of the ImageConsumer interface.
See Also:   ImageConsumer.setColorModel



setDimensions
public void setDimensions(int width, int height)(Code)
Filters the information provided in the setDimensions method of the ImageConsumer interface.
See Also:   ImageConsumer.setDimensions



setHints
public void setHints(int hints)(Code)
Filters the information provided in the setHints method of the ImageConsumer interface.
See Also:   ImageConsumer.setHints



setPixels
public void setPixels(int x, int y, int w, int h, ColorModel model, byte pixels, int off, int scansize)(Code)
Filters the information provided in the setPixels method of the ImageConsumer interface which takes an array of bytes.
See Also:   ImageConsumer.setPixels



setPixels
public void setPixels(int x, int y, int w, int h, ColorModel model, int pixels, int off, int scansize)(Code)
Filters the information provided in the setPixels method of the ImageConsumer interface which takes an array of integers.
See Also:   ImageConsumer.setPixels



setProperties
public void setProperties(Hashtable props)(Code)
Passes the properties from the source object along after adding a property indicating the stream of filters it has been run through.



Methods inherited from java.lang.Object
public boolean equals(Object obj)(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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