Package ca.cgjennings.graphics.filters

Class AlphaInversionFilter

java.lang.Object

ca.cgjennings.graphics.filters.AbstractImageFilter

ca.cgjennings.graphics.filters.AbstractPixelwiseFilter

ca.cgjennings.graphics.filters.AlphaInversionFilter

All Implemented Interfaces:

java.awt.image.BufferedImageOp

public class AlphaInversionFilter
extends AbstractPixelwiseFilter

An image filter that inverts the alpha channel of a source image: transparent areas will become solid and vice-versa. The RGB values of the pixels are unaffected.

In-place filtering: This class supports in-place filtering (the source and destination images may be the same).

Since:

3.0

Author:

Chris Jennings

See Also:

ChannelSwapFilter

Constructor Summary

Constructors

Constructor	Description
AlphaInversionFilter()

Method Summary

Modifier and Type	Method	Description
void	filterPixels(int[] argb, int start, int end)	This method is called with a block of ARGB values to be filtered.

Methods inherited from class ca.cgjennings.graphics.filters.AbstractPixelwiseFilter

filter, filter, filterPixel, workFactor

Methods inherited from class ca.cgjennings.graphics.filters.AbstractImageFilter

clamp, clamp, clamp, clampBoth, createCompatibleDestImage, fA, fB, fG, fR, getARGB, getARGB, getARGBSynch, getBounds2D, getPoint2D, getRenderingHints, iA, iB, iG, iR, setARGB, setARGB, setARGBSynch

Methods inherited from class java.lang.Object

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

Constructor Detail

AlphaInversionFilter

public AlphaInversionFilter()

Method Detail

filterPixels

public void filterPixels(int[] argb,
                         int start,
                         int end)

Description copied from class: AbstractPixelwiseFilter

This method is called with a block of ARGB values to be filtered. Subclasses must override this method to implement the actual filtering algorithm by replacing each pixel value in the range argb[start] ... argb[end-1] with the filtered value.

Specified by:

filterPixels in class AbstractPixelwiseFilter

Parameters:

argb - an array of pixel data to filter

start - the index of the first pixel to filter

end - the index of the last pixel to filter, plus one