--- /dev/null	2018-07-03 10:04:13.529646753 +0200
+++ new/modules/javafx.graphics/src/main/java/com/sun/marlin/DPathSimplifier.java	2018-07-03 11:02:22.437598507 +0200
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2017, 2018, 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.marlin;
+
+public final class DPathSimplifier implements DPathConsumer2D {
+
+    // distance threshold in pixels (device)
+    private static final double PIX_THRESHOLD = MarlinProperties.getPathSimplifierPixelTolerance();
+    // squared tolerance in pixels
+    private static final double SQUARE_TOLERANCE = PIX_THRESHOLD * PIX_THRESHOLD;
+
+    // members:
+    private DPathConsumer2D delegate;
+    // current reference point
+    private double cx, cy;
+    // flag indicating if the given point was skipped
+    private boolean skipped;
+    // last skipped point
+    private double sx, sy;
+
+    DPathSimplifier() {
+    }
+
+    public DPathSimplifier init(final DPathConsumer2D delegate) {
+        this.delegate = delegate;
+        skipped = false;
+        return this; // fluent API
+    }
+
+    private void finishPath() {
+        if (skipped) {
+            _lineTo(sx, sy);
+        }
+    }
+
+    @Override
+    public void pathDone() {
+        finishPath();
+        delegate.pathDone();
+    }
+
+    @Override
+    public void closePath() {
+        finishPath();
+        delegate.closePath();
+    }
+
+    @Override
+    public void moveTo(final double xe, final double ye) {
+        finishPath();
+        delegate.moveTo(xe, ye);
+        cx = xe;
+        cy = ye;
+    }
+
+    @Override
+    public void lineTo(final double xe, final double ye) {
+        // Test if segment is too small:
+        double dx = (xe - cx);
+        double dy = (ye - cy);
+
+        if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) {
+            skipped = true;
+            sx = xe;
+            sy = ye;
+            return;
+        }
+        _lineTo(xe, ye);
+    }
+
+    private void _lineTo(final double xe, final double ye) {
+        delegate.lineTo(xe, ye);
+        cx = xe;
+        cy = ye;
+        skipped = false;
+    }
+
+    @Override
+    public void quadTo(final double x1, final double y1,
+                       final double xe, final double ye)
+    {
+        // Test if curve is too small:
+        double dx = (xe - cx);
+        double dy = (ye - cy);
+
+        if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) {
+            // check control points P1:
+            dx = (x1 - cx);
+            dy = (y1 - cy);
+
+            if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) {
+                skipped = true;
+                sx = xe;
+                sy = ye;
+                return;
+            }
+        }
+        delegate.quadTo(x1, y1, xe, ye);
+        cx = xe;
+        cy = ye;
+        skipped = false;
+    }
+
+    @Override
+    public void curveTo(final double x1, final double y1,
+                        final double x2, final double y2,
+                        final double xe, final double ye)
+    {
+        // Test if curve is too small:
+        double dx = (xe - cx);
+        double dy = (ye - cy);
+
+        if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) {
+            // check control points P1:
+            dx = (x1 - cx);
+            dy = (y1 - cy);
+
+            if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) {
+                // check control points P2:
+                dx = (x2 - cx);
+                dy = (y2 - cy);
+
+                if ((dx * dx + dy * dy) <= SQUARE_TOLERANCE) {
+                    skipped = true;
+                    sx = xe;
+                    sy = ye;
+                    return;
+                }
+            }
+        }
+        delegate.curveTo(x1, y1, x2, y2, xe, ye);
+        cx = xe;
+        cy = ye;
+        skipped = false;
+    }
+}