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diff --git a/basegfx/test/clipstate.cxx b/basegfx/test/clipstate.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+#include <basegfx/utils/b2dclipstate.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+
+using namespace ::basegfx;
+
+namespace basegfx2d
+{
+
+class clipstate : public CppUnit::TestFixture
+{
+private:
+    utils::B2DClipState aUnion1;
+    utils::B2DClipState aUnion2;
+    utils::B2DClipState aIntersect;
+    utils::B2DClipState aXor;
+    utils::B2DClipState aSubtract;
+
+public:
+    void setUp() override
+    {
+        B2DRange aCenter(100, 100, -100, -100);
+        B2DRange aNorth(-10, -110, 10, -90);
+        B2DRange aWest(-110, -10, -90, 10);
+        B2DRange aSouth(-10, 110, 10, 90);
+        B2DRange aEast(110, -10, 90, 10);
+
+        aUnion1.unionRange(aCenter);
+        aUnion1.unionRange(aNorth);
+        aUnion1.unionRange(aWest);
+        aUnion1.unionRange(aSouth);
+        aUnion1.unionRange(aEast);
+
+        aUnion2.makeNull();
+        aUnion2.unionRange(aCenter);
+        aUnion2.unionRange(aNorth);
+        aUnion2.unionRange(aWest);
+        aUnion2.unionRange(aSouth);
+        aUnion2.unionRange(aEast);
+
+        aIntersect.intersectRange(aCenter);
+        aIntersect.intersectRange(aNorth);
+        aIntersect.intersectRange(aWest);
+        aIntersect.intersectRange(aSouth);
+        aIntersect.intersectRange(aEast);
+
+        aXor.makeNull();
+        aXor.xorRange(aCenter);
+        aXor.xorRange(aNorth);
+        aXor.xorRange(aWest);
+        aXor.xorRange(aSouth);
+        aXor.xorRange(aEast);
+
+        aSubtract.intersectRange(aCenter);
+        aSubtract.subtractRange(aNorth);
+        aSubtract.subtractRange(aWest);
+        aSubtract.subtractRange(aSouth);
+        aSubtract.subtractRange(aEast);
+    }
+
+    void verifyPoly(const char* sName, const char* sSvg, const utils::B2DClipState& toTest) const
+    {
+#if OSL_DEBUG_LEVEL > 2
+        fprintf(stderr, "%s - svg:d=\"%s\"\n",
+                sName, OUStringToOString(
+                    basegfx::utils::exportToSvgD(toTest.getClipPoly(), true, true, false),
+                    RTL_TEXTENCODING_UTF8).getStr() );
+#endif
+
+        B2DPolyPolygon aTmp1;
+        CPPUNIT_ASSERT_MESSAGE(sName,
+                               utils::importFromSvgD(
+                                   aTmp1, OUString::createFromAscii(sSvg), false, nullptr));
+
+        const OUString aSvg=
+            utils::exportToSvgD(toTest.getClipPoly(), true, true, false);
+        B2DPolyPolygon aTmp2;
+        CPPUNIT_ASSERT_MESSAGE(sName,
+                               utils::importFromSvgD(
+                                   aTmp2, aSvg, false, nullptr));
+
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            sName,
+            aTmp1, aTmp2);
+    }
+
+    void verifySimpleRange()
+    {
+        const char* const unionSvg="m100 10v90h-90v10h-20v-10h-90v-90h-10v-20h10v-90h90v-10h20v10h90v90h10v20z";
+        const char* const intersectSvg="m-100 10v-20h10v20zm90 90v-10h20v10zm0-190v-10h20v10zm100 100v-20h10v20z";
+        const char* const xorSvg="m-100 10h10v-20h-10zm90 90h20v-10h-20zm0-190h20v-10h-20zm100 100h10v-20h-10z"
+                           "m10 0v90h-90v10h-20v-10h-90v-90h-10v-20h10v-90h90v-10h20v10h90v90h10v20z";
+        const char* const subtractSvg="m-90 10v-20h-10v-90h90v10h20v-10h90v90h-10v20h10v90h-90v-10h-20v10h-90v-90z";
+
+        CPPUNIT_ASSERT_MESSAGE("cleared clip stays empty under union operation",
+                               aUnion1.isCleared());
+        verifyPoly("union", unionSvg, aUnion2);
+        verifyPoly("intersect", intersectSvg, aIntersect);
+        verifyPoly("xor", xorSvg, aXor);
+        verifyPoly("subtract", subtractSvg, aSubtract);
+    }
+
+    void verifyMixedClips()
+    {
+        utils::B2DClipState aMixedClip;
+
+        const char unionSvg[]="m100 10v90h-90v10h-20v-10h-90v-90h-10v-20h10v-90h90v-10h20v10h90v90h10v20z";
+
+        B2DPolyPolygon aTmp1;
+        CPPUNIT_ASSERT(utils::importFromSvgD(aTmp1, unionSvg, false, nullptr));
+
+        aMixedClip.intersectPolyPolygon(aTmp1);
+        aMixedClip.subtractRange(B2DRange(-20,-150,20,0));
+        aMixedClip.subtractRange(B2DRange(-150,-20,0,20));
+        aMixedClip.xorRange(B2DRange(-150,-150,150,150));
+
+        const char* const mixedClipSvg="m0 0v20h-100v80h90v10h20v-10h90v-90h10v-20h-10v-90h-80v100zm-20-20v-80h-80v80zm-130 170v-300h300v300z";
+        verifyPoly("mixed clip", mixedClipSvg, aMixedClip);
+    }
+
+    CPPUNIT_TEST_SUITE(clipstate);
+    CPPUNIT_TEST(verifySimpleRange);
+    CPPUNIT_TEST(verifyMixedClips);
+    CPPUNIT_TEST_SUITE_END();
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(basegfx2d::clipstate);
+} // namespace basegfx2d
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */