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

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

package com.sun.scenario.effect;

import com.sun.javafx.geom.Rectangle;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.scenario.effect.impl.EffectPeer;
import com.sun.scenario.effect.impl.Renderer;
import com.sun.scenario.effect.impl.state.LinearConvolveKernel;
import com.sun.scenario.effect.impl.state.LinearConvolveRenderState;

/**
 * An intermediate mix-in super class that performs the multi-pass filtering
 * algorithm common to all linear convolution filters such as Gaussian,
 * Box, and Motion Blurs and Shadows.  In particular, it is used for all
 * filters that use the LinearConvolve and LinearConvolveShadow shader peers.
 */
public abstract class LinearConvolveCoreEffect
    extends CoreEffect<LinearConvolveRenderState>
{
    public LinearConvolveCoreEffect(Effect input) {
        super(input);
    }

@Override
    public final LinearConvolveRenderState
        getRenderState(FilterContext fctx,
                       BaseTransform transform,
                       Rectangle outputClip,
                       Object renderHelper,
                       Effect defaultInput)
    {
        return getState().getRenderState(transform);
    }

@Override
    abstract LinearConvolveKernel getState();

@Override
    public ImageData filterImageDatas(FilterContext fctx,
                                      BaseTransform transform,
                                      Rectangle outputClip,
                                      LinearConvolveRenderState lcrstate,
                                      ImageData... inputs)
    {
        ImageData src = inputs[0];
        src.addref();
        if (lcrstate.isNop()) {
            return src;
        }
        Rectangle approxBounds = inputs[0].getUntransformedBounds();
        int approxW = approxBounds.width;
        int approxH = approxBounds.height;
        Rectangle filterClip = outputClip;

Renderer r = Renderer.getRenderer(fctx, this, approxW, approxH);
        for (int pass = 0; pass < 2; pass++) {
            src = lcrstate.validatePassInput(src, pass);
            EffectPeer peer = lcrstate.getPassPeer(r, fctx);
            if (peer != null) {
                peer.setPass(pass);
                ImageData res = peer.filter(this, lcrstate, transform, filterClip, src);
                src.unref();
                src = res;
                if (!src.validate(fctx)) {
                    src.unref();
                    return src;
                }
            }
        }

return src;
    }
}

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