| /* |
| * 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 "SkIntersections.h" |
| #include "SkPathOpsCubic.h" |
| #include "SkPathOpsLine.h" |
| #include "SkReduceOrder.h" |
| #include "Test.h" |
| |
| static struct lineCubic { |
| SkDCubic cubic; |
| SkDLine line; |
| } lineCubicTests[] = { |
| {{{{1, 2}, {2, 6}, {2, 0}, {1, 0}}}, {{{1, 0}, {1, 2}}}}, |
| {{{{0, 0}, {0, 1}, {0, 1}, {1, 1}}}, {{{0, 1}, {1, 0}}}}, |
| }; |
| |
| static const size_t lineCubicTests_count = sizeof(lineCubicTests) / sizeof(lineCubicTests[0]); |
| |
| static void CubicLineIntersectionTest(skiatest::Reporter* reporter) { |
| for (size_t index = 0; index < lineCubicTests_count; ++index) { |
| int iIndex = static_cast<int>(index); |
| const SkDCubic& cubic = lineCubicTests[index].cubic; |
| const SkDLine& line = lineCubicTests[index].line; |
| SkReduceOrder reduce1; |
| SkReduceOrder reduce2; |
| int order1 = reduce1.reduce(cubic, SkReduceOrder::kNo_Quadratics, |
| SkReduceOrder::kFill_Style); |
| int order2 = reduce2.reduce(line); |
| if (order1 < 4) { |
| SkDebugf("[%d] cubic order=%d\n", iIndex, order1); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order2 < 2) { |
| SkDebugf("[%d] line order=%d\n", iIndex, order2); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order1 == 4 && order2 == 2) { |
| SkIntersections i; |
| int roots = i.intersect(cubic, line); |
| for (int pt = 0; pt < roots; ++pt) { |
| double tt1 = i[0][pt]; |
| SkDPoint xy1 = cubic.xyAtT(tt1); |
| double tt2 = i[1][pt]; |
| SkDPoint xy2 = line.xyAtT(tt2); |
| if (!xy1.approximatelyEqual(xy2)) { |
| SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n", |
| __FUNCTION__, iIndex, pt, tt1, xy1.fX, xy1.fY, tt2, xy2.fX, xy2.fY); |
| } |
| REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2)); |
| } |
| } |
| } |
| } |
| |
| #include "TestClassDef.h" |
| DEFINE_TESTCLASS("PathOpsCubicLineIntersection", CubicLineIntersectionTestClass, \ |
| CubicLineIntersectionTest) |