Edit C:\Program Files\Java\jdk1.8.0_121\com\sun\scenario\effect\impl\state\GaussianBlurState.java

/*
 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
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 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.scenario.effect.impl.state;

import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.scenario.effect.Color4f;

/**
 * The state and implementation class for calculating 1 dimensional
 * linear convolution kernels for performing Gaussian blurs.
 */
public class GaussianBlurState extends HVSeparableKernel {
    private float hradius;
    private float vradius;

void checkRadius(float radius) {
        if (radius < 0f || radius > 63f) {
            throw new IllegalArgumentException("Radius must be in the range [1,63]");
        }
    }

public float getRadius() {
        return (hradius + vradius) / 2.0f;
    }

public void setRadius(float radius) {
        checkRadius(radius);
        this.hradius = radius;
        this.vradius = radius;
    }

public float getHRadius() {
        return hradius;
    }

public void setHRadius(float hradius) {
        checkRadius(hradius);
        this.hradius = hradius;
    }

public float getVRadius() {
        return vradius;
    }

public void setVRadius(float vradius) {
        checkRadius(vradius);
        this.vradius = vradius;
    }

float getRadius(int pass) {
        return (pass == 0 ? hradius : vradius);
    }

@Override
    public boolean isNop() {
        return hradius == 0 && vradius == 0;
    }

public int getPad(int pass) {
        return (int) Math.ceil(getRadius(pass));
    }

@Override
    public int getKernelSize(int pass) {
        return getPad(pass) * 2 + 1;
    }

public float getSpread() {
        return 0f;
    }

public Color4f getShadowColor() {
        return null;
    }

@Override
    public LinearConvolveRenderState getRenderState(BaseTransform filtertx) {
        return new GaussianRenderState(hradius, vradius, getSpread(),
                                       this instanceof GaussianShadowState, getShadowColor(),
                                       filtertx);
    }
}

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