com.jhlabs.image

Class VariableBlurFilter

java.lang.Object

com.jhlabs.image.AbstractBufferedImageOp

com.jhlabs.image.VariableBlurFilter

All Implemented Interfaces:

java.awt.image.BufferedImageOp, java.lang.Cloneable

public class VariableBlurFilter
extends AbstractBufferedImageOp

A filter which performs a box blur with a different blur radius at each pixel. The radius can either be specified by providing a blur mask image or by overriding the blurRadiusAt method.

Constructor Summary

Constructors

Constructor and Description
VariableBlurFilter()

Method Summary

Modifier and Type	Method and Description
void	blur(int[] in, int[] out, int width, int height, int radius, int pass)
protected float	blurRadiusAt(int x, int y, int width, int height) Override this to get a different blur radius at eahc point.
java.awt.image.BufferedImage	createCompatibleDestImage(java.awt.image.BufferedImage src, java.awt.image.ColorModel dstCM)
java.awt.image.BufferedImage	filter(java.awt.image.BufferedImage src, java.awt.image.BufferedImage dst)
java.awt.image.BufferedImage	getBlurMask() Get the mask used to give the amount of blur at each point.
java.awt.geom.Rectangle2D	getBounds2D(java.awt.image.BufferedImage src)
int	getHRadius() Get the horizontal size of the blur.
int	getIterations() Get the number of iterations the blur is performed.
java.awt.geom.Point2D	getPoint2D(java.awt.geom.Point2D srcPt, java.awt.geom.Point2D dstPt)
boolean	getPremultiplyAlpha() Get whether to premultiply the alpha channel.
int	getRadius() Get the radius of the effect.
java.awt.RenderingHints	getRenderingHints()
int	getVRadius() Get the vertical size of the blur.
void	setBlurMask(java.awt.image.BufferedImage blurMask) Set the mask used to give the amount of blur at each point.
void	setHRadius(int hRadius) Set the horizontal size of the blur.
void	setIterations(int iterations) Set the number of iterations the blur is performed.
void	setPremultiplyAlpha(boolean premultiplyAlpha) Set whether to premultiply the alpha channel.
void	setRadius(int radius) Set the radius of the effect.
void	setVRadius(int vRadius) Set the vertical size of the blur.
java.lang.String	toString()

Methods inherited from class com.jhlabs.image.AbstractBufferedImageOp

clone, getRGB, setRGB, stringToColor

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableBlurFilter

public VariableBlurFilter()

Method Detail

setPremultiplyAlpha

public void setPremultiplyAlpha(boolean premultiplyAlpha)

Set whether to premultiply the alpha channel.

Parameters:

premultiplyAlpha - true to premultiply the alpha

See Also:

getPremultiplyAlpha()

getPremultiplyAlpha

public boolean getPremultiplyAlpha()

Get whether to premultiply the alpha channel.

Returns:

true to premultiply the alpha

See Also:

setPremultiplyAlpha(boolean)

filter

public java.awt.image.BufferedImage filter(java.awt.image.BufferedImage src,
                                           java.awt.image.BufferedImage dst)

createCompatibleDestImage

public java.awt.image.BufferedImage createCompatibleDestImage(java.awt.image.BufferedImage src,
                                                              java.awt.image.ColorModel dstCM)

Specified by:

createCompatibleDestImage in interface java.awt.image.BufferedImageOp

Overrides:

createCompatibleDestImage in class AbstractBufferedImageOp

getBounds2D

public java.awt.geom.Rectangle2D getBounds2D(java.awt.image.BufferedImage src)

Specified by:

getBounds2D in interface java.awt.image.BufferedImageOp

Overrides:

getBounds2D in class AbstractBufferedImageOp

getPoint2D

public java.awt.geom.Point2D getPoint2D(java.awt.geom.Point2D srcPt,
                                        java.awt.geom.Point2D dstPt)

Specified by:

getPoint2D in interface java.awt.image.BufferedImageOp

Overrides:

getPoint2D in class AbstractBufferedImageOp

getRenderingHints

public java.awt.RenderingHints getRenderingHints()

Specified by:

getRenderingHints in interface java.awt.image.BufferedImageOp

Overrides:

getRenderingHints in class AbstractBufferedImageOp

blur

public void blur(int[] in,
                 int[] out,
                 int width,
                 int height,
                 int radius,
                 int pass)

blurRadiusAt

protected float blurRadiusAt(int x,
                             int y,
                             int width,
                             int height)

Override this to get a different blur radius at eahc point.

Parameters:

x - the x coordinate

y - the y coordinate

width - the width of the image

height - the height of the image

Returns:

the blur radius

setHRadius

public void setHRadius(int hRadius)

Set the horizontal size of the blur.

Parameters:

hRadius - the radius of the blur in the horizontal direction. Minimum value: 0

See Also:

getHRadius()

getHRadius

public int getHRadius()

Get the horizontal size of the blur.

Returns:

the radius of the blur in the horizontal direction

See Also:

setHRadius(int)

setVRadius

public void setVRadius(int vRadius)

Set the vertical size of the blur.

Parameters:

vRadius - the radius of the blur in the vertical direction. Minimum value: 0.

See Also:

getVRadius()

getVRadius

public int getVRadius()

Get the vertical size of the blur.

Returns:

the radius of the blur in the vertical direction

See Also:

setVRadius(int)

setRadius

public void setRadius(int radius)

Set the radius of the effect.

Parameters:

radius - the radius. Minimum value: 0

See Also:

getRadius()

getRadius

public int getRadius()

Get the radius of the effect.

Returns:

the radius

See Also:

setRadius(int)

setIterations

public void setIterations(int iterations)

Set the number of iterations the blur is performed.

Parameters:

iterations - the number of iterations. Minimum value: 0

See Also:

getIterations()

getIterations

public int getIterations()

Get the number of iterations the blur is performed.

Returns:

the number of iterations

See Also:

setIterations(int)

setBlurMask

public void setBlurMask(java.awt.image.BufferedImage blurMask)

Set the mask used to give the amount of blur at each point.

Parameters:

blurMask - the mask

See Also:

getBlurMask()

getBlurMask

public java.awt.image.BufferedImage getBlurMask()

Get the mask used to give the amount of blur at each point.

Returns:

the mask

See Also:

setBlurMask(BufferedImage)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object