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 /* * Copyright 2012 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "src/pathops/SkLineParameters.h" #include "tests/PathOpsTestCommon.h" #include "tests/Test.h" // tests to verify that distance calculations are coded correctly static const CubicPts tests[] = { {{{0, 0}, {1, 1}, {2, 2}, {0, 3}}}, {{{0, 0}, {1, 1}, {2, 2}, {3, 0}}}, {{{0, 0}, {5, 0}, {-2, 4}, {3, 4}}}, {{{0, 2}, {1, 0}, {2, 0}, {3, 0}}}, {{{0, .2}, {1, 0}, {2, 0}, {3, 0}}}, {{{0, .02}, {1, 0}, {2, 0}, {3, 0}}}, {{{0, .002}, {1, 0}, {2, 0}, {3, 0}}}, {{{0, .0002}, {1, 0}, {2, 0}, {3, 0}}}, {{{0, .00002}, {1, 0}, {2, 0}, {3, 0}}}, {{{0, FLT_EPSILON * 2}, {1, 0}, {2, 0}, {3, 0}}}, }; static const double answers[][2] = { {1, 2}, {1, 2}, {4, 4}, {1.1094003924, 0.5547001962}, {0.133038021, 0.06651901052}, {0.0133330370, 0.006666518523}, {0.001333333037, 0.0006666665185}, {0.000133333333, 6.666666652e-05}, {1.333333333e-05, 6.666666667e-06}, {1.5894571940104115e-07, 7.9472859700520577e-08}, }; static const size_t tests_count = SK_ARRAY_COUNT(tests); DEF_TEST(PathOpsLineParameters, reporter) { for (size_t index = 0; index < tests_count; ++index) { SkLineParameters lineParameters; const CubicPts& c = tests[index]; SkDCubic cubic; cubic.debugSet(c.fPts); SkASSERT(ValidCubic(cubic)); lineParameters.cubicEndPoints(cubic, 0, 3); double denormalizedDistance[2]; denormalizedDistance[0] = lineParameters.controlPtDistance(cubic, 1); denormalizedDistance[1] = lineParameters.controlPtDistance(cubic, 2); double normalSquared = lineParameters.normalSquared(); size_t inner; for (inner = 0; inner < 2; ++inner) { double distSq = denormalizedDistance[inner]; distSq *= distSq; double answersSq = answers[index][inner]; answersSq *= answersSq; if (AlmostEqualUlps(distSq, normalSquared * answersSq)) { continue; } SkDebugf("%s [%d,%d] denormalizedDistance:%g != answer:%g" " distSq:%g answerSq:%g normalSquared:%g\n", __FUNCTION__, static_cast(index), (int)inner, denormalizedDistance[inner], answers[index][inner], distSq, answersSq, normalSquared); } lineParameters.normalize(); double normalizedDistance[2]; normalizedDistance[0] = lineParameters.controlPtDistance(cubic, 1); normalizedDistance[1] = lineParameters.controlPtDistance(cubic, 2); for (inner = 0; inner < 2; ++inner) { if (AlmostEqualUlps(fabs(normalizedDistance[inner]), answers[index][inner])) { continue; } SkDebugf("%s [%d,%d] normalizedDistance:%1.9g != answer:%g\n", __FUNCTION__, static_cast(index), (int)inner, normalizedDistance[inner], answers[index][inner]); REPORTER_ASSERT(reporter, 0); } } }