| #include "Test.h" |
| #include "../../src/core/SkConcaveToTriangles.h" |
| #include "SkGeometry.h" |
| |
| static int GetIndexFromPoint(const SkPoint &pt, |
| int numPts, const SkPoint *pts) { |
| for (int i = 0; i < numPts; ++i) |
| if (pt.fX == pts[i].fX && pt.fY == pts[i].fY) |
| return i; |
| return -1; |
| } |
| |
| |
| bool gPrintTriangles = false; // Can we set this on the command line? |
| |
| static void PrintTriangles(const SkTDArray<SkPoint> &triangles, |
| int numPts, const SkPoint *pts, |
| skiatest::Reporter* reporter) { |
| if (gPrintTriangles) { |
| SkPoint *p = triangles.begin(); |
| int n = triangles.count(); |
| REPORTER_ASSERT(reporter, n % 3 == 0); |
| n /= 3; |
| printf("%d Triangles:\n{\n", n); |
| for (; n-- != 0; p += 3) |
| printf(" { {%.7g, %.7g}, {%.7g, %.7g}, {%.7g, %.7g} }, " |
| "// { %2d, %2d, %2d }\n", |
| p[0].fX, p[0].fY, |
| p[1].fX, p[1].fY, |
| p[2].fX, p[2].fY, |
| GetIndexFromPoint(p[0], numPts, pts), |
| GetIndexFromPoint(p[1], numPts, pts), |
| GetIndexFromPoint(p[2], numPts, pts)); |
| printf("}\n"); |
| } |
| } |
| |
| |
| static bool CompareTriangleList(int numTriangles, |
| const float refTriangles[][3][2], |
| const SkTDArray<SkPoint> &triangles) { |
| if (triangles.count() != numTriangles * 3) { |
| printf("Expected %d triangles, not %d\n", |
| numTriangles, triangles.count() / 3); |
| return false; |
| } |
| int numErrors = 0; |
| for (int i = 0; i < numTriangles; ++i) { |
| const float *r = &refTriangles[i][0][0]; |
| const SkScalar *t = &triangles[i * 3].fX; |
| bool equalTriangle = true; |
| for (int j = 6; j-- != 0; r++, t++) |
| if (SkFloatToScalar(*r) != *t) |
| equalTriangle = false; |
| if (equalTriangle == false) { |
| ++numErrors; |
| printf("Triangle %d differs\n", i); |
| } |
| } |
| if (numErrors > 0) |
| printf("%d triangles differ\n", numErrors); |
| return numErrors == 0; |
| } |
| |
| |
| #ifndef LEFT_HANDED_POLYGONS |
| static const SkPoint star[] = { |
| // Outer contour is clockwise if Y is down, counterclockwise if Y is up. |
| { SkFloatToScalar(110), SkFloatToScalar( 20) }, |
| { SkFloatToScalar(100), SkFloatToScalar( 50) }, |
| { SkFloatToScalar(130), SkFloatToScalar( 80) }, |
| { SkFloatToScalar( 90), SkFloatToScalar( 80) }, |
| { SkFloatToScalar( 70), SkFloatToScalar(120) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 80) }, |
| { SkFloatToScalar( 10), SkFloatToScalar( 80) }, |
| { SkFloatToScalar( 40), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 30), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 40) }, |
| // Inner contour is counterclockwise if Y is down, clockwise if Y is up. |
| { SkFloatToScalar(110), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 60), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 60), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 80), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 80), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 50) } |
| }; |
| static const SkPoint plus[] = { |
| { SkFloatToScalar( 70), SkFloatToScalar( 10) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 50) }, |
| { SkFloatToScalar(110), SkFloatToScalar( 50) }, |
| { SkFloatToScalar(110), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 70), SkFloatToScalar(110) }, |
| { SkFloatToScalar( 50), SkFloatToScalar(110) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 10), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 10), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 10) } |
| }; |
| static const SkPoint zipper[] = { |
| { SkFloatToScalar( 10), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 10), SkFloatToScalar( 10) }, |
| { SkFloatToScalar( 20), SkFloatToScalar( 10) }, |
| { SkFloatToScalar( 20), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 30), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 30), SkFloatToScalar( 10) }, |
| { SkFloatToScalar( 60), SkFloatToScalar( 10) }, |
| { SkFloatToScalar( 60), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 10) }, |
| { SkFloatToScalar(100), SkFloatToScalar( 10) }, |
| { SkFloatToScalar(100), SkFloatToScalar( 50) }, |
| { SkFloatToScalar(110), SkFloatToScalar( 50) }, |
| { SkFloatToScalar(110), SkFloatToScalar( 10) }, |
| { SkFloatToScalar(140), SkFloatToScalar( 10) }, |
| { SkFloatToScalar(140), SkFloatToScalar( 60) }, |
| { SkFloatToScalar(130), SkFloatToScalar( 60) }, |
| { SkFloatToScalar(130), SkFloatToScalar( 20) }, |
| { SkFloatToScalar(120), SkFloatToScalar( 20) }, |
| { SkFloatToScalar(120), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 90), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 90), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 80), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 80), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 40), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 40), SkFloatToScalar( 60) } |
| }; |
| #else // LEFT_HANDED_POLYGONS |
| static const SkPoint star[] = { |
| // Outer contour is counterclockwise if Y is down, clockwise if Y is up. |
| { SkFloatToScalar(110), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 40) }, |
| { SkFloatToScalar( 30), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 40), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 10), SkFloatToScalar( 80) }, |
| { SkFloatToScalar( 50), SkFloatToScalar( 80) }, |
| { SkFloatToScalar( 70), SkFloatToScalar(120) }, |
| { SkFloatToScalar( 90), SkFloatToScalar( 80) }, |
| { SkFloatToScalar(130), SkFloatToScalar( 80) }, |
| { SkFloatToScalar(100), SkFloatToScalar( 50) }, |
| // Inner contour is clockwise if Y is down, counterclockwise if Y is up. |
| { SkFloatToScalar(110), SkFloatToScalar( 20) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 50) }, |
| { SkFloatToScalar( 80), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 80), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 60), SkFloatToScalar( 70) }, |
| { SkFloatToScalar( 60), SkFloatToScalar( 60) }, |
| { SkFloatToScalar( 70), SkFloatToScalar( 50) } |
| }; |
| #endif // LEFT_HANDED_POLYGONS |
| #define kNumStarVertices 10 |
| #define kNumStarHoleVertices (sizeof(star) / sizeof(star[0])) |
| |
| |
| // Star test |
| static void TestStarTriangulation(skiatest::Reporter* reporter) { |
| static const float refTriangles[][3][2] = { |
| { { 30, 20}, { 70, 40}, { 40, 50} }, // { 8, 9, 7 } |
| { {100, 50}, { 10, 80}, { 40, 50} }, // { 1, 6, 7 } |
| { {100, 50}, { 40, 50}, { 70, 40} }, // { 1, 7, 9 } |
| { {100, 50}, { 70, 40}, {110, 20} }, // { 1, 9, 0 } |
| { { 90, 80}, { 70, 120}, { 50, 80} }, // { 3, 4, 5 } |
| { {130, 80}, { 90, 80}, { 50, 80} }, // { 2, 3, 5 } degen |
| { {130, 80}, { 50, 80}, { 10, 80} }, // { 2, 5, 6 } degen |
| { {130, 80}, { 10, 80}, {100, 50} } // { 2, 6, 1 } |
| }; |
| const size_t numRefTriangles = sizeof(refTriangles) |
| / (6 * sizeof(refTriangles[0][0][0])); |
| SkTDArray<SkPoint> triangles; |
| bool success = SkConcaveToTriangles(kNumStarVertices, star, &triangles); |
| PrintTriangles(triangles, kNumStarVertices, star, reporter); |
| success = CompareTriangleList(numRefTriangles, refTriangles, triangles) |
| && success; |
| reporter->report("Triangulate Star", success ? reporter->kPassed |
| : reporter->kFailed); |
| } |
| |
| |
| // Star with hole test |
| static void TestStarHoleTriangulation(skiatest::Reporter* reporter) { |
| static const float refTriangles[][3][2] = { |
| { {100, 50}, { 80, 60}, { 70, 50} }, // { 1, 15, 16 } |
| { {100, 50}, { 70, 50}, {110, 20} }, // { 1, 16, 0 } |
| { { 30, 20}, { 70, 40}, { 40, 50} }, // { 8, 9, 7 } |
| { { 60, 70}, { 80, 70}, { 10, 80} }, // { 13, 14, 6 } |
| { { 60, 60}, { 60, 70}, { 10, 80} }, // { 12, 13, 6 } |
| { { 70, 50}, { 60, 60}, { 10, 80} }, // { 11, 12, 6 } |
| { { 70, 50}, { 10, 80}, { 40, 50} }, // { 11, 6, 7 } |
| { { 70, 50}, { 40, 50}, { 70, 40} }, // { 11, 7, 9 } |
| { { 70, 50}, { 70, 40}, {110, 20} }, // { 11, 9, 10 } |
| { { 90, 80}, { 70, 120}, { 50, 80} }, // { 3, 4, 5 } |
| { {130, 80}, { 90, 80}, { 50, 80} }, // { 2, 3, 5 } degen |
| { {130, 80}, { 50, 80}, { 10, 80} }, // { 2, 5, 6 } degen |
| { {130, 80}, { 10, 80}, { 80, 70} }, // { 2, 6, 14 } |
| { {130, 80}, { 80, 70}, { 80, 60} }, // { 2, 14, 15 } |
| { {130, 80}, { 80, 60}, {100, 50} } // { 2, 15, 1 } |
| }; |
| const size_t numRefTriangles = sizeof(refTriangles) |
| / (6 * sizeof(refTriangles[0][0][0])); |
| SkTDArray<SkPoint> triangles; |
| bool success = SkConcaveToTriangles(kNumStarHoleVertices, star, &triangles); |
| PrintTriangles(triangles, kNumStarHoleVertices, star, reporter); |
| success = CompareTriangleList(numRefTriangles, refTriangles, triangles) |
| && success; |
| reporter->report("Triangulate Star With Hole", success ? reporter->kPassed |
| : reporter->kFailed); |
| } |
| |
| |
| // Plus test |
| static void TestPlusTriangulation(skiatest::Reporter* reporter) { |
| static const float refTriangles[][3][2] = { |
| { { 50, 10}, { 70, 10}, { 50, 50} }, // { 11, 0, 10 } |
| { { 70, 50}, {110, 50}, { 10, 70} }, // { 1, 2, 8 } |
| { { 70, 50}, { 10, 70}, { 10, 50} }, // { 1, 8, 9 } |
| { { 70, 50}, { 10, 50}, { 50, 50} }, // { 1, 9, 10 } |
| { { 70, 50}, { 50, 50}, { 70, 10} }, // { 1, 10, 0 } |
| { { 70, 70}, { 50, 110}, { 50, 70} }, // { 4, 6, 7 } |
| { {110, 70}, { 70, 70}, { 50, 70} }, // { 3, 4, 7 } |
| { {110, 70}, { 50, 70}, { 10, 70} }, // { 3, 7, 8 } |
| { {110, 70}, { 10, 70}, {110, 50} }, // { 3, 8, 2 } |
| { { 70, 110}, { 50, 110}, { 70, 70} }, // { 5, 6, 4 } |
| }; |
| const size_t numRefTriangles = sizeof(refTriangles) |
| / (6 * sizeof(refTriangles[0][0][0])); |
| SkTDArray<SkPoint> triangles; |
| const size_t numVertices = sizeof(plus) / sizeof(SkPoint); |
| bool success = SkConcaveToTriangles(numVertices, plus, &triangles); |
| PrintTriangles(triangles, numVertices, plus, reporter); |
| success = CompareTriangleList(numRefTriangles, refTriangles, triangles) |
| && success; |
| reporter->report("Triangulate Plus", success ? reporter->kPassed |
| : reporter->kFailed); |
| } |
| |
| |
| // Zipper test |
| static void TestZipperTriangulation(skiatest::Reporter* reporter) { |
| static const float refTriangles[][3][2] = { |
| { { 10, 10}, { 20, 10}, { 20, 50} }, // { 1, 2, 3 } |
| { { 20, 50}, { 30, 50}, { 10, 60} }, // { 3, 4, 0 } |
| { { 10, 10}, { 20, 50}, { 10, 60} }, // { 1, 3, 0 } |
| { { 30, 10}, { 60, 10}, { 40, 20} }, // { 5, 6, 26 } |
| { { 30, 10}, { 40, 20}, { 30, 50} }, // { 5, 26, 4 } |
| { { 40, 60}, { 10, 60}, { 30, 50} }, // { 27, 0, 4 } |
| { { 40, 60}, { 30, 50}, { 40, 20} }, // { 27, 4, 26 } |
| { { 60, 50}, { 70, 50}, { 50, 60} }, // { 7, 8, 24 } |
| { { 50, 20}, { 60, 50}, { 50, 60} }, // { 25, 7, 24 } |
| { { 50, 20}, { 40, 20}, { 60, 10} }, // { 25, 26, 6 } |
| { { 60, 50}, { 50, 20}, { 60, 10} }, // { 7, 25, 6 } |
| { { 70, 10}, {100, 10}, { 80, 20} }, // { 9, 10, 22 } |
| { { 70, 10}, { 80, 20}, { 70, 50} }, // { 9, 22, 8 } |
| { { 80, 60}, { 50, 60}, { 70, 50} }, // { 23, 24, 8 } |
| { { 80, 60}, { 70, 50}, { 80, 20} }, // { 23, 8, 22 } |
| { {100, 50}, {110, 50}, { 90, 60} }, // { 11, 12, 20 } |
| { { 90, 20}, {100, 50}, { 90, 60} }, // { 21, 11, 20 } |
| { { 90, 20}, { 80, 20}, {100, 10} }, // { 21, 22, 10 } |
| { {100, 50}, { 90, 20}, {100, 10} }, // { 11, 21, 10 } |
| { {110, 10}, {140, 10}, {120, 20} }, // { 13, 14, 18 } |
| { {110, 10}, {120, 20}, {110, 50} }, // { 13, 18, 12 } |
| { {120, 60}, { 90, 60}, {110, 50} }, // { 19, 20, 12 } |
| { {120, 60}, {110, 50}, {120, 20} }, // { 19, 12, 18 } |
| { {140, 60}, {130, 60}, {130, 20} }, // { 15, 16, 17 } |
| { {130, 20}, {120, 20}, {140, 10} }, // { 17, 18, 14 } |
| { {140, 60}, {130, 20}, {140, 10} }, // { 15, 17, 14 } |
| }; |
| const size_t numRefTriangles = sizeof(refTriangles) |
| / (6 * sizeof(refTriangles[0][0][0])); |
| SkTDArray<SkPoint> triangles; |
| const size_t numVertices = sizeof(zipper) / sizeof(SkPoint); |
| bool success = SkConcaveToTriangles(numVertices, zipper, &triangles); |
| PrintTriangles(triangles, numVertices, zipper, reporter); |
| success = CompareTriangleList(numRefTriangles, refTriangles, triangles) |
| && success; |
| reporter->report("Triangulate Zipper", success ? reporter->kPassed |
| : reporter->kFailed); |
| } |
| |
| |
| static void TestTriangulation(skiatest::Reporter* reporter) { |
| TestStarTriangulation(reporter); |
| TestStarHoleTriangulation(reporter); |
| TestPlusTriangulation(reporter); |
| TestZipperTriangulation(reporter); |
| } |
| |
| #include "TestClassDef.h" |
| DEFINE_TESTCLASS("Triangulation", TriangulationTestClass, TestTriangulation) |