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
  40 namespace basegfx2d
  41 {
  42
  43 class genericclipper : public CppUnit::TestFixture
  44 {
  45 private:
  46     B2DPolygon aSelfIntersecting;
  47     B2DPolygon aShiftedRectangle;
  48
  49 public:
  50     // initialise your test code values here.
  51     void setUp()
  52     {
  53         aSelfIntersecting.append(B2DPoint(0,  0));
  54         aSelfIntersecting.append(B2DPoint(0,  100));
  55         aSelfIntersecting.append(B2DPoint(75, 100));
  56         aSelfIntersecting.append(B2DPoint(75, 50));
  57         aSelfIntersecting.append(B2DPoint(25, 50));
  58         aSelfIntersecting.append(B2DPoint(25, 150));
  59         aSelfIntersecting.append(B2DPoint(100,150));
  60         aSelfIntersecting.append(B2DPoint(100,0));
  61         aSelfIntersecting.setClosed(true);
  62
  63         aShiftedRectangle = tools::createPolygonFromRect(
  64             B2DRange(0,90,20,150));
  65     }
  66
  67     void tearDown()
  68     {}
  69
  70     void validate(const char* pName,
  71                   const char* pValidSvgD,
  72                   B2DPolyPolygon (*pFunc)(const B2DPolyPolygon&, const B2DPolyPolygon&))
  73     {
  74         const B2DPolyPolygon aSelfIntersect(
  75             tools::prepareForPolygonOperation(aSelfIntersecting));
  76         const B2DPolyPolygon aRect(
  77             tools::prepareForPolygonOperation(aShiftedRectangle));
  78 #if OSL_DEBUG_LEVEL > 2
  79         fprintf(stderr, "%s input LHS - svg:d=\"%s\"\n",
  80                 pName, OUStringToOString(
  81                     basegfx::tools::exportToSvgD(
  82                         aSelfIntersect, true, true, false),
  83                     RTL_TEXTENCODING_UTF8).getStr() );
  84         fprintf(stderr, "%s input RHS - svg:d=\"%s\"\n",
  85                 pName, OUStringToOString(
  86                     basegfx::tools::exportToSvgD(
  87                         aRect, true, true, false),
  88                     RTL_TEXTENCODING_UTF8).getStr() );
  89 #endif
  90
  91         const B2DPolyPolygon aRes=
  92             pFunc(aSelfIntersect, aRect);
  93
  94 #if OSL_DEBUG_LEVEL > 2
  95         fprintf(stderr, "%s - svg:d=\"%s\"\n",
  96                 pName, OUStringToOString(
  97                     basegfx::tools::exportToSvgD(aRes, true, true, false),
  98                     RTL_TEXTENCODING_UTF8).getStr() );
  99 #endif
 100
 101         OUString aValid=OUString::createFromAscii(pValidSvgD);
 102
 103         CPPUNIT_ASSERT_MESSAGE(pName,
 104                                basegfx::tools::exportToSvgD(aRes, true, true, false) == aValid);
 105     }
 106
 107     void validateOr()
 108     {
 109         const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm75 100v-50h-50v50z";
 110         validate("validateOr", pValid, &tools::solvePolygonOperationOr);
 111     }
 112
 113     void validateXor()
 114     {
 115         const char* pValid="m0 0h100v150h-75v-50h-5v50h-20v-50-10zm0 100h20v-10h-20zm75 0v-50h-50v50z";
 116         validate("validateXor", pValid, &tools::solvePolygonOperationXor);
 117     }
 118
 119     void validateAnd()
 120     {
 121         const char* pValid="m0 100v-10h20v10z";
 122         validate("validateAnd", pValid, &tools::solvePolygonOperationAnd);
 123     }
 124
 125     void validateDiff()
 126     {
 127         const char* pValid="m0 90v-90h100v150h-75v-50h-5v-10zm75 10v-50h-50v50z";
 128         validate("validateDiff", pValid, &tools::solvePolygonOperationDiff);
 129     }
 130
 131     void validateCrossover(const char* pName,
 132                            const char* pInputSvgD,
 133                            const char* pValidSvgD)
 134     {
 135         OUString aInput=OUString::createFromAscii(pInputSvgD);
 136         OUString aValid=OUString::createFromAscii(pValidSvgD);
 137         B2DPolyPolygon aInputPoly, aValidPoly;
 138
 139         tools::importFromSvgD(aInputPoly, aInput, false, NULL);
 140         tools::importFromSvgD(aValidPoly, aValid, false, NULL);
 141
 142         CPPUNIT_ASSERT_MESSAGE(
 143             pName,
 144             basegfx::tools::exportToSvgD(
 145                 tools::solveCrossovers(aInputPoly), true, true, false) == aValid);
 146     }
 147
 148     void checkCrossoverSolver()
 149     {
 150         // partially intersecting polygons, with a common subsection
 151         validateCrossover(
 152             "partially intersecting",
 153             "m0 0 v 5  h 3 h 1 h 1 h 1 v -2 v -3 z"
 154               "m3 7 v -2 h 1 h 1 h 1 v -2 h 1 v 3 z",
 155             "m0 0v5h3 1 1 1v-2-3zm3 7v-2h1 1 1v-2h1v3z");
 156
 157         // first polygon is identical to subset of second polygon
 158         validateCrossover(
 159             "full subset",
 160             "m0 0 v 5  h 3 h 1 h 1 v -5 z"
 161               "m3 10 v -5 h 1 h 1 v -5 h -5 v 5 h 3 z",
 162             "m0 0v5h3 1 1v-5zm3 10v-5zm1-5h1v-5h-5v5h3z");
 163
 164         // first polygon is identical to subset of second polygon, but
 165         // oriented in the opposite direction
 166         validateCrossover(
 167             "full subset, opposite direction",
 168             "m0 0 v 5 h 3 h 1 h 1 v -5 z"
 169               "m3 10 v -5 h -1 h -1 h -1 v -5 h 5 v 5 h 2 z",
 170             "m0 0v5h1 1 1-1-1-1v-5h5v5-5zm4 5h1 2l-4 5v-5z");
 171
 172         // first polygon is identical to subset of second polygon, and
 173         // has a curve segment (triggers different code path)
 174         validateCrossover(
 175             "full subset, plus curves",
 176             "m0 0 v 5  h 3 h 1 h 1 c 2 0 2 0 0 -5 z"
 177               "m3 10 v -5 h 1 h 1 c 2 0 2 0 0 -5 h -5 v 5 h 3 z",
 178             "m0 0v5h3 1 1c2 0 2 0 0-5zm3 10v-5zm1-5h1c2 0 2 0 0-5h-5v5h3z");
 179     }
 180
 181     // Change the following lines only, if you add, remove or rename
 182     // member functions of the current class,
 183     // because these macros are need by auto register mechanism.
 184
 185     CPPUNIT_TEST_SUITE(genericclipper);
 186     CPPUNIT_TEST(validateOr);
 187     CPPUNIT_TEST(validateXor);
 188     CPPUNIT_TEST(validateAnd);
 189     CPPUNIT_TEST(validateDiff);
 190     CPPUNIT_TEST(checkCrossoverSolver);
 191     CPPUNIT_TEST_SUITE_END();
 192 };
 193
 194 // -----------------------------------------------------------------------------
 195 CPPUNIT_TEST_SUITE_REGISTRATION(basegfx2d::genericclipper);
 196 } // namespace basegfx2d
 197
 198 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */