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| 1 /* |
| 2 * Copyright 2012 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 #include "SkIntersections.h" |
| 8 #include "SkPathOpsCubic.h" |
| 9 #include "SkPathOpsLine.h" |
| 10 #include "SkReduceOrder.h" |
| 11 #include "Test.h" |
| 12 |
| 13 static struct lineCubic { |
| 14 SkDCubic cubic; |
| 15 SkDLine line; |
| 16 } lineCubicTests[] = { |
| 17 {{{{1, 2}, {2, 6}, {2, 0}, {1, 0}}}, {{{1, 0}, {1, 2}}}}, |
| 18 {{{{0, 0}, {0, 1}, {0, 1}, {1, 1}}}, {{{0, 1}, {1, 0}}}}, |
| 19 }; |
| 20 |
| 21 static const size_t lineCubicTests_count = sizeof(lineCubicTests) / sizeof(lineC
ubicTests[0]); |
| 22 |
| 23 static void CubicLineIntersectionTest(skiatest::Reporter* reporter) { |
| 24 for (size_t index = 0; index < lineCubicTests_count; ++index) { |
| 25 int iIndex = static_cast<int>(index); |
| 26 const SkDCubic& cubic = lineCubicTests[index].cubic; |
| 27 const SkDLine& line = lineCubicTests[index].line; |
| 28 SkReduceOrder reduce1; |
| 29 SkReduceOrder reduce2; |
| 30 int order1 = reduce1.reduce(cubic, SkReduceOrder::kNo_Quadratics, |
| 31 SkReduceOrder::kFill_Style); |
| 32 int order2 = reduce2.reduce(line); |
| 33 if (order1 < 4) { |
| 34 SkDebugf("[%d] cubic order=%d\n", iIndex, order1); |
| 35 REPORTER_ASSERT(reporter, 0); |
| 36 } |
| 37 if (order2 < 2) { |
| 38 SkDebugf("[%d] line order=%d\n", iIndex, order2); |
| 39 REPORTER_ASSERT(reporter, 0); |
| 40 } |
| 41 if (order1 == 4 && order2 == 2) { |
| 42 SkIntersections i; |
| 43 int roots = i.intersect(cubic, line); |
| 44 for (int pt = 0; pt < roots; ++pt) { |
| 45 double tt1 = i[0][pt]; |
| 46 SkDPoint xy1 = cubic.xyAtT(tt1); |
| 47 double tt2 = i[1][pt]; |
| 48 SkDPoint xy2 = line.xyAtT(tt2); |
| 49 if (!xy1.approximatelyEqual(xy2)) { |
| 50 SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n", |
| 51 __FUNCTION__, iIndex, pt, tt1, xy1.fX, xy1.fY, tt2, xy2.
fX, xy2.fY); |
| 52 } |
| 53 REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2)); |
| 54 } |
| 55 } |
| 56 } |
| 57 } |
| 58 |
| 59 #include "TestClassDef.h" |
| 60 DEFINE_TESTCLASS("PathOpsCubicLineIntersection", CubicLineIntersectionTestClass,
\ |
| 61 CubicLineIntersectionTest) |
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