caryclark@google.com | 9166dcb | 2013-04-08 11:50:00 +0000 | [diff] [blame^] | 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(lineCubicTests[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) |