java.awt.image

Class AreaAveragingScaleFilter

public class AreaAveragingScaleFilter extends ReplicateScaleFilter

This filter should produce images which do not have image artifacts like broken lines which were originally unbroken. The cost is of course speed. Using bi-linear interpolation here against 4 pixel points should give the desired results although Sun does not specify what the exact algorithm should be.

Constructor Summary
	AreaAveragingScaleFilter(int width, int height) Construct an instance of `AreaAveragingScaleFilter` which should be used in conjunction with a `FilteredImageSource` object.

Method Summary
void	setHints(int flags) The `ImageProducer` should call this method with a bit mask of hints from any of `RANDOMPIXELORDER`, `TOPDOWNLEFTRIGHT`, `COMPLETESCANLINES`, `SINGLEPASS`, `SINGLEFRAME` from the `ImageConsumer` interface.
void	setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int offset, int scansize) This function delivers a rectangle of pixels where any pixel(m,n) is stored in the array as a `byte` at index (n * scansize + m + offset).
void	setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int offset, int scansize) This function delivers a rectangle of pixels where any pixel(m,n) is stored in the array as an `int` at index (n * scansize + m + offset).

Constructor Detail

AreaAveragingScaleFilter

public AreaAveragingScaleFilter(int width, int height)

Construct an instance of AreaAveragingScaleFilter which should be used in conjunction with a FilteredImageSource object.

Parameters: width the width of the destination image height the height of the destination image

Method Detail

setHints

public void setHints(int flags)

The ImageProducer should call this method with a bit mask of hints from any of RANDOMPIXELORDER, TOPDOWNLEFTRIGHT, COMPLETESCANLINES, SINGLEPASS, SINGLEFRAME from the ImageConsumer interface.
FIXME - more than likely Sun's implementation desires TOPDOWNLEFTRIGHT order and this method is overloaded here in order to assure that mask is part of the hints added to the consumer.

Parameters: flags a bit mask of hints

setPixels

public void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int offset, int scansize)

This function delivers a rectangle of pixels where any pixel(m,n) is stored in the array as a byte at index (n * scansize + m + offset).

Parameters: x the x coordinate of the rectangle y the y coordinate of the rectangle w the width of the rectangle h the height of the rectangle model the ColorModel used to translate the pixels pixels the array of pixel values offset the index of the first pixels in the pixels array scansize the width to use in extracting pixels from the pixels array

setPixels

public void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int offset, int scansize)

This function delivers a rectangle of pixels where any pixel(m,n) is stored in the array as an int at index (n * scansize + m + offset).