--- /dev/null	2014-02-21 17:01:54.000000000 -0800
+++ new/modules/graphics/src/main/java/com/sun/scenario/effect/LinearConvolveCoreEffect.java	2014-02-21 17:01:54.000000000 -0800
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+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;
+    }
+}