basegfx/test/genericclipper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  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() 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
  67     void validate(const char* pName,
  68                   const char* pValidSvgD,
  69                   B2DPolyPolygon (*pFunc)(const B2DPolyPolygon&, const B2DPolyPolygon&))
  70     {
  71         const B2DPolyPolygon aSelfIntersect(
  72             tools::prepareForPolygonOperation(aSelfIntersecting));
  73         const B2DPolyPolygon aRect(
  74             tools::prepareForPolygonOperation(aShiftedRectangle));
  75 #if OSL_DEBUG_LEVEL > 2
  76         fprintf(stderr, "%s input LHS - svg:d=\"%s\"\n",
  77                 pName, OUStringToOString(
  78                     basegfx::tools::exportToSvgD(
  79                         aSelfIntersect, true, true, false),
  80                     RTL_TEXTENCODING_UTF8).getStr() );
  81         fprintf(stderr, "%s input RHS - svg:d=\"%s\"\n",
  82                 pName, OUStringToOString(
  83                     basegfx::tools::exportToSvgD(
  84                         aRect, true, true, false),
  85                     RTL_TEXTENCODING_UTF8).getStr() );
  86 #endif
  87
  88         const B2DPolyPolygon aRes=
  89             pFunc(aSelfIntersect, aRect);
  90
  91 #if OSL_DEBUG_LEVEL > 2
  92         fprintf(stderr, "%s - svg:d=\"%s\"\n",
  93                 pName, OUStringToOString(
  94                     basegfx::tools::exportToSvgD(aRes, true, true, false),
  95                     RTL_TEXTENCODING_UTF8).getStr() );
  96 #endif
  97
  98         OUString aValid=OUString::createFromAscii(pValidSvgD);
  99
 100         CPPUNIT_ASSERT_MESSAGE(pName,
 101                                basegfx::tools::exportToSvgD(aRes, true, true, false) == aValid);
 102     }
 103
 104     void validateOr()
 105     {
 106         const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm75 100v-50h-50v50z";
 107         validate("validateOr", pValid, &tools::solvePolygonOperationOr);
 108     }
 109
 110     void validateXor()
 111     {
 112         const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm0 100h20v-10h-20zm75 0v-50h-50v50z";
 113         validate("validateXor", pValid, &tools::solvePolygonOperationXor);
 114     }
 115
 116     void validateAnd()
 117     {
 118         const char* pValid="m0 100v-10h20v10z";
 119         validate("validateAnd", pValid, &tools::solvePolygonOperationAnd);
 120     }
 121
 122     void validateDiff()
 123     {
 124         const char* pValid="m0 90v-90h100v150h-75v-50h-5v-10zm75 10v-50h-50v50z";
 125         validate("validateDiff", pValid, &tools::solvePolygonOperationDiff);
 126     }
 127
 128     void validateCrossover(const char* pName,
 129                            const char* pInputSvgD,
 130                            const char* pValidSvgD)
 131     {
 132         OUString aInput=OUString::createFromAscii(pInputSvgD);
 133         OUString aValid=OUString::createFromAscii(pValidSvgD);
 134         B2DPolyPolygon aInputPoly, aValidPoly;
 135
 136         tools::importFromSvgD(aInputPoly, aInput, false, nullptr);
 137         tools::importFromSvgD(aValidPoly, aValid, false, nullptr);
 138
 139         CPPUNIT_ASSERT_MESSAGE(
 140             pName,
 141             basegfx::tools::exportToSvgD(
 142                 tools::solveCrossovers(aInputPoly), true, true, false) == aValid);
 143     }
 144
 145     void checkCrossoverSolver()
 146     {
 147         // partially intersecting polygons, with a common subsection
 148         validateCrossover(
 149             "partially intersecting",
 150             "m0 0 v 5  h 3 h 1 h 1 h 1 v -2 v -3 z"
 151               "m3 7 v -2 h 1 h 1 h 1 v -2 h 1 v 3 z",
 152             "m0 0v5h3 1 1 1v-2-3zm3 7v-2h1 1 1v-2h1v3z");
 153
 154         // first polygon is identical to subset of second polygon
 155         validateCrossover(
 156             "full subset",
 157             "m0 0 v 5  h 3 h 1 h 1 v -5 z"
 158               "m3 10 v -5 h 1 h 1 v -5 h -5 v 5 h 3 z",
 159             "m0 0v5h3 1 1v-5zm3 10v-5zm1-5h1v-5h-5v5h3z");
 160
 161         // first polygon is identical to subset of second polygon, but
 162         // oriented in the opposite direction
 163         validateCrossover(
 164             "full subset, opposite direction",
 165             "m0 0 v 5 h 3 h 1 h 1 v -5 z"
 166               "m3 10 v -5 h -1 h -1 h -1 v -5 h 5 v 5 h 2 z",
 167             "m0 0v5h1 1 1-1-1-1v-5h5v5-5zm4 5h1 2l-4 5v-5z");
 168
 169         // first polygon is identical to subset of second polygon, and
 170         // has a curve segment (triggers different code path)
 171         validateCrossover(
 172             "full subset, plus curves",
 173             "m0 0 v 5  h 3 h 1 h 1 c 2 0 2 0 0 -5 z"
 174               "m3 10 v -5 h 1 h 1 c 2 0 2 0 0 -5 h -5 v 5 h 3 z",
 175             "m0 0v5h3 1 1c2 0 2 0 0-5zm3 10v-5zm1-5h1c2 0 2 0 0-5h-5v5h3z");
 176     }
 177
 178     // Change the following lines only, if you add, remove or rename
 179     // member functions of the current class,
 180     // because these macros are need by auto register mechanism.
 181
 182     CPPUNIT_TEST_SUITE(genericclipper);
 183     CPPUNIT_TEST(validateOr);
 184     CPPUNIT_TEST(validateXor);
 185     CPPUNIT_TEST(validateAnd);
 186     CPPUNIT_TEST(validateDiff);
 187     CPPUNIT_TEST(checkCrossoverSolver);
 188     CPPUNIT_TEST_SUITE_END();
 189 };
 190
 191 CPPUNIT_TEST_SUITE_REGISTRATION(basegfx2d::genericclipper);
 192 } // namespace basegfx2d
 193
 194 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */