basegfx/test/genericclipper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/types.h>
  21 #include <cppunit/TestAssert.h>
  22 #include <cppunit/TestFixture.h>
  23 #include <cppunit/extensions/HelperMacros.h>
  24
  25 #include <basegfx/matrix/b2dhommatrix.hxx>
  26 #include <basegfx/curve/b2dcubicbezier.hxx>
  27 #include <basegfx/curve/b2dbeziertools.hxx>
  28 #include <basegfx/range/b2dpolyrange.hxx>
  29 #include <basegfx/polygon/b2dpolygon.hxx>
  30 #include <basegfx/polygon/b2dpolygontools.hxx>
  31 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  32 #include <basegfx/polygon/b2dpolypolygoncutter.hxx>
  33 #include <basegfx/polygon/b2dpolygonclipper.hxx>
  34 #include <basegfx/polygon/b2dpolypolygon.hxx>
  35 #include <basegfx/numeric/ftools.hxx>
  36
  37 using namespace ::basegfx;
  38
  39 namespace basegfx2d
  40 {
  41
  42 class genericclipper : public CppUnit::TestFixture
  43 {
  44 private:
  45     B2DPolygon aSelfIntersecting;
  46     B2DPolygon aShiftedRectangle;
  47
  48 public:
  49     // initialise your test code values here.
  50     void setUp() SAL_OVERRIDE
  51     {
  52         aSelfIntersecting.append(B2DPoint(0,  0));
  53         aSelfIntersecting.append(B2DPoint(0,  100));
  54         aSelfIntersecting.append(B2DPoint(75, 100));
  55         aSelfIntersecting.append(B2DPoint(75, 50));
  56         aSelfIntersecting.append(B2DPoint(25, 50));
  57         aSelfIntersecting.append(B2DPoint(25, 150));
  58         aSelfIntersecting.append(B2DPoint(100,150));
  59         aSelfIntersecting.append(B2DPoint(100,0));
  60         aSelfIntersecting.setClosed(true);
  61
  62         aShiftedRectangle = tools::createPolygonFromRect(
  63             B2DRange(0,90,20,150));
  64     }
  65
  66     void tearDown() SAL_OVERRIDE
  67     {}
  68
  69     void validate(const char* pName,
  70                   const char* pValidSvgD,
  71                   B2DPolyPolygon (*pFunc)(const B2DPolyPolygon&, const B2DPolyPolygon&))
  72     {
  73         const B2DPolyPolygon aSelfIntersect(
  74             tools::prepareForPolygonOperation(aSelfIntersecting));
  75         const B2DPolyPolygon aRect(
  76             tools::prepareForPolygonOperation(aShiftedRectangle));
  77 #if OSL_DEBUG_LEVEL > 2
  78         fprintf(stderr, "%s input LHS - svg:d=\"%s\"\n",
  79                 pName, OUStringToOString(
  80                     basegfx::tools::exportToSvgD(
  81                         aSelfIntersect, true, true, false),
  82                     RTL_TEXTENCODING_UTF8).getStr() );
  83         fprintf(stderr, "%s input RHS - svg:d=\"%s\"\n",
  84                 pName, OUStringToOString(
  85                     basegfx::tools::exportToSvgD(
  86                         aRect, true, true, false),
  87                     RTL_TEXTENCODING_UTF8).getStr() );
  88 #endif
  89
  90         const B2DPolyPolygon aRes=
  91             pFunc(aSelfIntersect, aRect);
  92
  93 #if OSL_DEBUG_LEVEL > 2
  94         fprintf(stderr, "%s - svg:d=\"%s\"\n",
  95                 pName, OUStringToOString(
  96                     basegfx::tools::exportToSvgD(aRes, true, true, false),
  97                     RTL_TEXTENCODING_UTF8).getStr() );
  98 #endif
  99
 100         OUString aValid=OUString::createFromAscii(pValidSvgD);
 101
 102         CPPUNIT_ASSERT_MESSAGE(pName,
 103                                basegfx::tools::exportToSvgD(aRes, true, true, false) == aValid);
 104     }
 105
 106     void validateOr()
 107     {
 108         const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm75 100v-50h-50v50z";
 109         validate("validateOr", pValid, &tools::solvePolygonOperationOr);
 110     }
 111
 112     void validateXor()
 113     {
 114         const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm0 100h20v-10h-20zm75 0v-50h-50v50z";
 115         validate("validateXor", pValid, &tools::solvePolygonOperationXor);
 116     }
 117
 118     void validateAnd()
 119     {
 120         const char* pValid="m0 100v-10h20v10z";
 121         validate("validateAnd", pValid, &tools::solvePolygonOperationAnd);
 122     }
 123
 124     void validateDiff()
 125     {
 126         const char* pValid="m0 90v-90h100v150h-75v-50h-5v-10zm75 10v-50h-50v50z";
 127         validate("validateDiff", pValid, &tools::solvePolygonOperationDiff);
 128     }
 129
 130     void validateCrossover(const char* pName,
 131                            const char* pInputSvgD,
 132                            const char* pValidSvgD)
 133     {
 134         OUString aInput=OUString::createFromAscii(pInputSvgD);
 135         OUString aValid=OUString::createFromAscii(pValidSvgD);
 136         B2DPolyPolygon aInputPoly, aValidPoly;
 137
 138         tools::importFromSvgD(aInputPoly, aInput, false, NULL);
 139         tools::importFromSvgD(aValidPoly, aValid, false, NULL);
 140
 141         CPPUNIT_ASSERT_MESSAGE(
 142             pName,
 143             basegfx::tools::exportToSvgD(
 144                 tools::solveCrossovers(aInputPoly), true, true, false) == aValid);
 145     }
 146
 147     void checkCrossoverSolver()
 148     {
 149         // partially intersecting polygons, with a common subsection
 150         validateCrossover(
 151             "partially intersecting",
 152             "m0 0 v 5  h 3 h 1 h 1 h 1 v -2 v -3 z"
 153               "m3 7 v -2 h 1 h 1 h 1 v -2 h 1 v 3 z",
 154             "m0 0v5h3 1 1 1v-2-3zm3 7v-2h1 1 1v-2h1v3z");
 155
 156         // first polygon is identical to subset of second polygon
 157         validateCrossover(
 158             "full subset",
 159             "m0 0 v 5  h 3 h 1 h 1 v -5 z"
 160               "m3 10 v -5 h 1 h 1 v -5 h -5 v 5 h 3 z",
 161             "m0 0v5h3 1 1v-5zm3 10v-5zm1-5h1v-5h-5v5h3z");
 162
 163         // first polygon is identical to subset of second polygon, but
 164         // oriented in the opposite direction
 165         validateCrossover(
 166             "full subset, opposite direction",
 167             "m0 0 v 5 h 3 h 1 h 1 v -5 z"
 168               "m3 10 v -5 h -1 h -1 h -1 v -5 h 5 v 5 h 2 z",
 169             "m0 0v5h1 1 1-1-1-1v-5h5v5-5zm4 5h1 2l-4 5v-5z");
 170
 171         // first polygon is identical to subset of second polygon, and
 172         // has a curve segment (triggers different code path)
 173         validateCrossover(
 174             "full subset, plus curves",
 175             "m0 0 v 5  h 3 h 1 h 1 c 2 0 2 0 0 -5 z"
 176               "m3 10 v -5 h 1 h 1 c 2 0 2 0 0 -5 h -5 v 5 h 3 z",
 177             "m0 0v5h3 1 1c2 0 2 0 0-5zm3 10v-5zm1-5h1c2 0 2 0 0-5h-5v5h3z");
 178     }
 179
 180     // Change the following lines only, if you add, remove or rename
 181     // member functions of the current class,
 182     // because these macros are need by auto register mechanism.
 183
 184     CPPUNIT_TEST_SUITE(genericclipper);
 185     CPPUNIT_TEST(validateOr);
 186     CPPUNIT_TEST(validateXor);
 187     CPPUNIT_TEST(validateAnd);
 188     CPPUNIT_TEST(validateDiff);
 189     CPPUNIT_TEST(checkCrossoverSolver);
 190     CPPUNIT_TEST_SUITE_END();
 191 };
 192
 193 CPPUNIT_TEST_SUITE_REGISTRATION(basegfx2d::genericclipper);
 194 } // namespace basegfx2d
 195
 196 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */