Package com.day.image

Class ResizeOp

java.lang.Object

com.day.image.AbstractBufferedImageOp

com.day.image.ResizeOp

All Implemented Interfaces:

BufferedImageOp

public class ResizeOp
extends AbstractBufferedImageOp

The ResizeOp class implements a weighted resize filter which produces better results than the scaling AffineTransformOp and is faster than a blurring ConvolveOp with a following scaling AffineTransformOp.

The RenderingHints defined at construction time are used if the destination color model has to be adapted for the filter operation.

Note that the following constraints have to be met

• The source and destination must be different.

Since:

coati

See Also:

Implementation of Image Resizing

Constructor Summary

Constructors

Constructor	Description
ResizeOp(double scale)	Creates a new ResizeOp with no rendering hints and the same horizontal and vertical scale factor.
ResizeOp(double scaleX, double scaleY)	Creates a new ResizeOp with no rendering hints.
ResizeOp(double scaleX, double scaleY, RenderingHints hints)	Creates a new ResizeOp object.

Method Summary

Modifier and Type	Method	Description
Rectangle2D	getBounds2D(BufferedImage src)	Returns the bounding box of the filtered destination image.
Point2D	getPoint2D(Point2D srcPt, Point2D dstPt)	Returns the location of the destination point given a point in the source image.
boolean	isFast()
void	setFast(boolean fast)

Methods inherited from class com.day.image.AbstractBufferedImageOp

createCompatibleDestImage, filter, getRenderingHints

Methods inherited from class java.lang.Object

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

Constructor Detail

ResizeOp

public ResizeOp(double scaleX,
                double scaleY,
                RenderingHints hints)

Creates a new ResizeOp object.

Parameters:

scaleX - The horizontal scale factor

scaleY - The vertical scale factor

hints - The rendering hints. May be null.

ResizeOp

public ResizeOp(double scaleX,
                double scaleY)

Creates a new ResizeOp with no rendering hints.

Parameters:

scaleX - The horizontal scale factor

scaleY - The vertical scale factor

ResizeOp

public ResizeOp(double scale)

Creates a new ResizeOp with no rendering hints and the same horizontal and vertical scale factor.

Parameters:

scale - The scale factor used for both horizontal and vertical scaling.

Method Detail

getBounds2D

public Rectangle2D getBounds2D(BufferedImage src)

Returns the bounding box of the filtered destination image. The IllegalArgumentException may be thrown if the source image is incompatible with the types of images allowed by the class implementing this filter.

Specified by:

getBounds2D in interface BufferedImageOp

Overrides:

getBounds2D in class AbstractBufferedImageOp

getPoint2D

public Point2D getPoint2D(Point2D srcPt,
                          Point2D dstPt)

Returns the location of the destination point given a point in the source image. If dstPt is non-null, it will be used to hold the return value.

Specified by:

getPoint2D in interface BufferedImageOp

Overrides:

getPoint2D in class AbstractBufferedImageOp

isFast

public boolean isFast()

setFast

public void setFast(boolean fast)