Edit C:\Program Files\Java\jdk1.8.0_121\com\sun\scenario\effect\impl\sw\sse\SSEBoxShadowPeer.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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 */

/*
 * This file was originally generated by JSLC
 * and then hand edited for performance.
 */

package com.sun.scenario.effect.impl.sw.sse;

import com.sun.scenario.effect.Effect;
import com.sun.scenario.effect.FilterContext;
import com.sun.scenario.effect.ImageData;
import com.sun.scenario.effect.impl.HeapImage;
import com.sun.scenario.effect.impl.Renderer;
import com.sun.javafx.geom.Rectangle;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.scenario.effect.impl.state.BoxRenderState;

public class SSEBoxShadowPeer extends SSEEffectPeer<BoxRenderState> {

public SSEBoxShadowPeer(FilterContext fctx, Renderer r, String uniqueName) {
        super(fctx, r, uniqueName);
    }

@Override
    public ImageData filter(Effect effect,
                            BoxRenderState brstate,
                            BaseTransform transform,
                            Rectangle outputClip,
                            ImageData... inputs)
    {
        setRenderState(brstate);
        // NOTE: for now, all input images must be TYPE_INT_ARGB_PRE

// Calculate the amount the image grows on each iteration (size-1)
        boolean horizontal = (getPass() == 0);
        int hinc = horizontal ? brstate.getBoxPixelSize(0) - 1 : 0;
        int vinc = horizontal ? 0 : brstate.getBoxPixelSize(1) - 1;
        if (hinc < 0) hinc = 0;
        if (vinc < 0) vinc = 0;
        int iterations = brstate.getBlurPasses();
        float spread = brstate.getSpread();
        if (horizontal && (iterations < 1 || (hinc < 1 && vinc < 1))) {
            inputs[0].addref();
            return inputs[0];
        }
        // Calculate the amount the image will grow through the full operation
        // Always upgrade to the next even amount of growth
        int growx = (hinc * iterations + 1) & (~0x1);
        int growy = (vinc * iterations + 1) & (~0x1);

// Assert: rstate.getEffectTransformSpace() == UserSpace
        // NOTE: We could still have a transformed ImageData for other reasons...
        HeapImage src = (HeapImage)inputs[0].getUntransformedImage();
        Rectangle srcr = inputs[0].getUntransformedBounds();

HeapImage cur = src;
        int curw = srcr.width;
        int curh = srcr.height;
        int curscan = cur.getScanlineStride();
        int[] curPixels = cur.getPixelArray();

int finalw = curw + growx;
        int finalh = curh + growy;
        boolean force = !horizontal;
        while (force || curw < finalw || curh < finalh) {
            int neww = curw + hinc;
            int newh = curh + vinc;
            if (neww > finalw) neww = finalw;
            if (newh > finalh) newh = finalh;
            HeapImage dst = (HeapImage)getRenderer().getCompatibleImage(neww, newh);
            int newscan = dst.getScanlineStride();
            int[] newPixels = dst.getPixelArray();
            if (iterations == 0) {
                // The last "fixup" iteration of 2 should have no spread.
                spread = 0f;
            }
            if (horizontal) {
                filterHorizontalBlack(newPixels, neww, newh, newscan,
                                      curPixels, curw, curh, curscan,
                                      spread);
            } else if (neww < finalw || newh < finalh) {
                // Use BLACK for shadow color until very last pass
                filterVerticalBlack(newPixels, neww, newh, newscan,
                                    curPixels, curw, curh, curscan,
                                    spread);
            } else {
                float shadowColor[] =
                     brstate.getShadowColor().getPremultipliedRGBComponents();
                if (shadowColor[3] == 1f &&
                    shadowColor[0] == 0f &&
                    shadowColor[1] == 0f &&
                    shadowColor[2] == 0f)
                {
                    filterVerticalBlack(newPixels, neww, newh, newscan,
                                        curPixels, curw, curh, curscan,
                                        spread);
                } else {
                    filterVertical(newPixels, neww, newh, newscan,
                                   curPixels, curw, curh, curscan,
                                   spread, shadowColor);
                }
            }
            if (cur != src) {
                getRenderer().releaseCompatibleImage(cur);
            }
            iterations--;
            force = false;
            cur = dst;
            curw = neww;
            curh = newh;
            curPixels = newPixels;
            curscan = newscan;
        }

Rectangle dstBounds =
            new Rectangle(srcr.x - growx/2, srcr.y - growy/2, curw, curh);
        return new ImageData(getFilterContext(), cur, dstBounds, inputs[0].getTransform());
    }

private static native void
        filterHorizontalBlack(int dstPixels[], int dstw, int dsth, int dstscan,
                              int srcPixels[], int srcw, int srch, int srcscan,
                              float spread);

private static native void
        filterVerticalBlack(int dstPixels[], int dstw, int dsth, int dstscan,
                            int srcPixels[], int srcw, int srch, int srcscan,
                            float spread);

private static native void
        filterVertical(int dstPixels[], int dstw, int dsth, int dstscan,
                       int srcPixels[], int srcw, int srch, int srcscan,
                       float spread, float shadowColor[]);
}

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