/* * Copyright 2011 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "Test.h" #include "SkPathMeasure.h" static void test_small_segment3(skiatest::Reporter* reporter) { #ifdef SK_SCALAR_IS_FLOAT SkPath path; const SkPoint pts[] = { { 0, 0 }, { 100000000000.0f, 100000000000.0f }, { 0, 0 }, { 10, 10 }, { 10, 10 }, { 0, 0 }, { 10, 10 } }; path.moveTo(pts[0]); for (size_t i = 1; i < SK_ARRAY_COUNT(pts); i += 3) { path.cubicTo(pts[i], pts[i + 1], pts[i + 2]); } SkPathMeasure meas(path, false); meas.getLength(); #endif } static void test_small_segment2(skiatest::Reporter* reporter) { #ifdef SK_SCALAR_IS_FLOAT SkPath path; const SkPoint pts[] = { { 0, 0 }, { 100000000000.0f, 100000000000.0f }, { 0, 0 }, { 10, 10 }, { 0, 0 }, }; path.moveTo(pts[0]); for (size_t i = 1; i < SK_ARRAY_COUNT(pts); i += 2) { path.quadTo(pts[i], pts[i + 1]); } SkPathMeasure meas(path, false); meas.getLength(); #endif } static void test_small_segment(skiatest::Reporter* reporter) { #ifdef SK_SCALAR_IS_FLOAT SkPath path; const SkPoint pts[] = { { 100000, 100000}, // big jump between these points, makes a big segment { SkFloatToScalar(1.0005f), SkFloatToScalar(0.9999f) }, // tiny (non-zero) jump between these points { SK_Scalar1, SK_Scalar1 }, }; path.moveTo(pts[0]); for (size_t i = 1; i < SK_ARRAY_COUNT(pts); ++i) { path.lineTo(pts[i]); } SkPathMeasure meas(path, false); /* this would assert (before a fix) because we added a segment with the same length as the prev segment, due to the follow (bad) pattern d = distance(pts[0], pts[1]); distance += d; seg->fDistance = distance; SkASSERT(d > 0); // TRUE SkASSERT(seg->fDistance > prevSeg->fDistance); // FALSE This 2nd assert failes because (distance += d) didn't affect distance because distance >>> d. */ meas.getLength(); #endif } static void TestPathMeasure(skiatest::Reporter* reporter) { SkPath path; path.moveTo(0, 0); path.lineTo(SK_Scalar1, 0); path.lineTo(SK_Scalar1, SK_Scalar1); path.lineTo(0, SK_Scalar1); SkPathMeasure meas(path, true); SkScalar length = meas.getLength(); SkASSERT(length == SK_Scalar1*4); path.reset(); path.moveTo(0, 0); path.lineTo(SK_Scalar1*3, SK_Scalar1*4); meas.setPath(&path, false); length = meas.getLength(); REPORTER_ASSERT(reporter, length == SK_Scalar1*5); path.reset(); path.addCircle(0, 0, SK_Scalar1); meas.setPath(&path, true); length = meas.getLength(); // SkDebugf("circle arc-length = %g\n", length); // Test the behavior following a close not followed by a move. path.reset(); path.lineTo(SK_Scalar1, 0); path.lineTo(SK_Scalar1, SK_Scalar1); path.lineTo(0, SK_Scalar1); path.close(); path.lineTo(-SK_Scalar1, 0); meas.setPath(&path, false); length = meas.getLength(); REPORTER_ASSERT(reporter, length == SK_Scalar1 * 4); meas.nextContour(); length = meas.getLength(); REPORTER_ASSERT(reporter, length == SK_Scalar1); SkPoint position; SkVector tangent; REPORTER_ASSERT(reporter, meas.getPosTan(SK_ScalarHalf, &position, &tangent)); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fX, -SK_ScalarHalf, SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, position.fY == 0); REPORTER_ASSERT(reporter, tangent.fX == -SK_Scalar1); REPORTER_ASSERT(reporter, tangent.fY == 0); // Test degenerate paths path.reset(); path.moveTo(0, 0); path.lineTo(0, 0); path.lineTo(SK_Scalar1, 0); path.quadTo(SK_Scalar1, 0, SK_Scalar1, 0); path.quadTo(SK_Scalar1, SK_Scalar1, SK_Scalar1, SK_Scalar1 * 2); path.cubicTo(SK_Scalar1, SK_Scalar1 * 2, SK_Scalar1, SK_Scalar1 * 2, SK_Scalar1, SK_Scalar1 * 2); path.cubicTo(SK_Scalar1*2, SK_Scalar1 * 2, SK_Scalar1*3, SK_Scalar1 * 2, SK_Scalar1*4, SK_Scalar1 * 2); meas.setPath(&path, false); length = meas.getLength(); REPORTER_ASSERT(reporter, length == SK_Scalar1 * 6); REPORTER_ASSERT(reporter, meas.getPosTan(SK_ScalarHalf, &position, &tangent)); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fX, SK_ScalarHalf, SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, position.fY == 0); REPORTER_ASSERT(reporter, tangent.fX == SK_Scalar1); REPORTER_ASSERT(reporter, tangent.fY == 0); REPORTER_ASSERT(reporter, meas.getPosTan(SkFloatToScalar(2.5f), &position, &tangent)); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fX, SK_Scalar1, SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fY, SkFloatToScalar(1.5f))); REPORTER_ASSERT(reporter, tangent.fX == 0); REPORTER_ASSERT(reporter, tangent.fY == SK_Scalar1); REPORTER_ASSERT(reporter, meas.getPosTan(SkFloatToScalar(4.5f), &position, &tangent)); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fX, SkFloatToScalar(2.5f), SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fY, SkFloatToScalar(2.0f), SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, tangent.fX == SK_Scalar1); REPORTER_ASSERT(reporter, tangent.fY == 0); path.reset(); path.moveTo(0, 0); path.lineTo(SK_Scalar1, 0); path.moveTo(SK_Scalar1, SK_Scalar1); path.moveTo(SK_Scalar1 * 2, SK_Scalar1 * 2); path.lineTo(SK_Scalar1, SK_Scalar1 * 2); meas.setPath(&path, false); length = meas.getLength(); REPORTER_ASSERT(reporter, length == SK_Scalar1); REPORTER_ASSERT(reporter, meas.getPosTan(SK_ScalarHalf, &position, &tangent)); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fX, SK_ScalarHalf, SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, position.fY == 0); REPORTER_ASSERT(reporter, tangent.fX == SK_Scalar1); REPORTER_ASSERT(reporter, tangent.fY == 0); meas.nextContour(); length = meas.getLength(); REPORTER_ASSERT(reporter, length == SK_Scalar1); REPORTER_ASSERT(reporter, meas.getPosTan(SK_ScalarHalf, &position, &tangent)); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fX, SkFloatToScalar(1.5f), SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, SkScalarNearlyEqual(position.fY, SkFloatToScalar(2.0f), SkFloatToScalar(0.0001f))); REPORTER_ASSERT(reporter, tangent.fX == -SK_Scalar1); REPORTER_ASSERT(reporter, tangent.fY == 0); test_small_segment(reporter); test_small_segment2(reporter); test_small_segment3(reporter); } #include "TestClassDef.h" DEFINE_TESTCLASS("PathMeasure", PathMeasureTestClass, TestPathMeasure)