org.apache.batik.ext.awt.image.rendered

Class MorphologyOp

java.lang.Object

org.apache.batik.ext.awt.image.rendered.MorphologyOp

All Implemented Interfaces:

java.awt.image.BufferedImageOp, java.awt.image.RasterOp

public class MorphologyOp
extends java.lang.Object
implements java.awt.image.BufferedImageOp, java.awt.image.RasterOp

This class provides an implementation for the SVG feMorphology filter, as defined in Chapter 15, section 20 of the SVG specification.

Version:

$Id: MorphologyOp.java 1733416 2016-03-03 07:07:13Z gadams $

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	doDilation
private java.awt.color.ColorSpace	lRGB
private int	radiusX The radius of the operation on X axis
private int	radiusY The radius of the operation on Y axis
private int	rangeX
private int	rangeY
private java.awt.color.ColorSpace	sRGB

Constructor Summary

Constructors

Constructor and Description
MorphologyOp(int radiusX, int radiusY, boolean doDilation)

Method Summary

Modifier and Type	Method and Description
private void	checkCompatible(java.awt.image.ColorModel colorModel, java.awt.image.SampleModel sampleModel)
private void	checkCompatible(java.awt.image.SampleModel model)
java.awt.image.BufferedImage	createCompatibleDestImage(java.awt.image.BufferedImage src, java.awt.image.ColorModel destCM)
java.awt.image.WritableRaster	createCompatibleDestRaster(java.awt.image.Raster src)
java.awt.image.BufferedImage	filter(java.awt.image.BufferedImage src, java.awt.image.BufferedImage dest) This implementation of filter does the morphology operation on a premultiplied alpha image.
java.awt.image.WritableRaster	filter(java.awt.image.Raster src, java.awt.image.WritableRaster dest) Filters src and writes result into dest.
java.awt.geom.Rectangle2D	getBounds2D(java.awt.image.BufferedImage src)
java.awt.geom.Rectangle2D	getBounds2D(java.awt.image.Raster src)
java.awt.geom.Point2D	getPoint2D(java.awt.geom.Point2D srcPt, java.awt.geom.Point2D destPt)
java.awt.RenderingHints	getRenderingHints()
(package private) static boolean	isBetter(int v1, int v2, boolean doDilation)
private boolean	isCompatible(java.awt.image.ColorModel colorModel, java.awt.image.SampleModel sampleModel)
private void	specialProcessColumn(java.awt.image.Raster src, java.awt.image.WritableRaster dest)
private void	specialProcessRow(java.awt.image.Raster src, java.awt.image.WritableRaster dest)

Methods inherited from class java.lang.Object

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

Field Detail

radiusX

private int radiusX

The radius of the operation on X axis

radiusY

private int radiusY

The radius of the operation on Y axis

doDilation

private boolean doDilation

rangeX

private final int rangeX

rangeY

private final int rangeY

sRGB

private final java.awt.color.ColorSpace sRGB

lRGB

private final java.awt.color.ColorSpace lRGB

Constructor Detail

MorphologyOp

public MorphologyOp(int radiusX,
                    int radiusY,
                    boolean doDilation)

Parameters:

radiusX - defines the radius of filter operation on X-axis. Should not be negative. A value of zero will disable the effect of the operation on X-axis, as described in the SVG specification.

radiusY - defines the radius of filter operation on Y-axis. Should not be negative. A value of zero will disable the effect of the operation on Y-axis, as described in the SVG specification.

doDilation - defines whether to do dilation or erosion operation. Will do dilation when the value is true, erosion when false.

Method Detail

getBounds2D

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

Specified by:

getBounds2D in interface java.awt.image.RasterOp

getBounds2D

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

Specified by:

getBounds2D in interface java.awt.image.BufferedImageOp

getPoint2D

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

Specified by:

getPoint2D in interface java.awt.image.BufferedImageOp

Specified by:

getPoint2D in interface java.awt.image.RasterOp

checkCompatible

private void checkCompatible(java.awt.image.ColorModel colorModel,
                             java.awt.image.SampleModel sampleModel)

isCompatible

private boolean isCompatible(java.awt.image.ColorModel colorModel,
                             java.awt.image.SampleModel sampleModel)

checkCompatible

private void checkCompatible(java.awt.image.SampleModel model)

getRenderingHints

public java.awt.RenderingHints getRenderingHints()

Specified by:

getRenderingHints in interface java.awt.image.BufferedImageOp

Specified by:

getRenderingHints in interface java.awt.image.RasterOp

createCompatibleDestRaster

public java.awt.image.WritableRaster createCompatibleDestRaster(java.awt.image.Raster src)

Specified by:

createCompatibleDestRaster in interface java.awt.image.RasterOp

createCompatibleDestImage

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

Specified by:

createCompatibleDestImage in interface java.awt.image.BufferedImageOp

isBetter

static final boolean isBetter(int v1,
                              int v2,
                              boolean doDilation)

specialProcessRow

private void specialProcessRow(java.awt.image.Raster src,
                               java.awt.image.WritableRaster dest)

specialProcessColumn

private void specialProcessColumn(java.awt.image.Raster src,
                                  java.awt.image.WritableRaster dest)

filter

public java.awt.image.WritableRaster filter(java.awt.image.Raster src,
                                            java.awt.image.WritableRaster dest)

Filters src and writes result into dest. If dest if null, then a Raster is created. If dest and src refer to the same object, then the source is modified.

The filtering kernel(the operation range for each pixel) is a rectangle of width 2*radiusX+1 and height radiusY+1

Specified by:

filter in interface java.awt.image.RasterOp

Parameters:

src - the Raster to be filtered

dest - stores the filtered image. If null, a destination will be created. src and dest can refer to the same Raster, in which situation the src will be modified.

filter

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

This implementation of filter does the morphology operation on a premultiplied alpha image. This tends to muddy the colors. so something that is supposed to be a mostly transparent bright red may well become a muddy opaque red. Where as I think it should become a bright opaque red. Which is the result you would get if you were using unpremult data.

Specified by:

filter in interface java.awt.image.BufferedImageOp