From 6544817b9848b7b6ffb28c761a1011e0df42f0e9 Mon Sep 17 00:00:00 2001 From: caryclark Date: Thu, 7 Jan 2016 11:33:15 -0800 Subject: test & doc for SkUnitCubicInterp R=reed@google.com BUG=skia:959 GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1562333002 Review URL: https://codereview.chromium.org/1562333002 --- tests/InterpolatorTest.cpp | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'tests/InterpolatorTest.cpp') diff --git a/tests/InterpolatorTest.cpp b/tests/InterpolatorTest.cpp index 3cfd19f56b..f520ebb700 100644 --- a/tests/InterpolatorTest.cpp +++ b/tests/InterpolatorTest.cpp @@ -58,4 +58,35 @@ DEF_TEST(Interpolator, reporter) { result = inter.timeToValues(175, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); + for (SkScalar val = -0.1f; val <= 1.1f; val += 0.1f) { + REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkTPin(0.f, val, 1.f), + SkUnitCubicInterp(val, 1.f/3, 1.f/3, 2.f/3, 2.f/3))); + } + + // These numbers come from + // http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag. + const SkScalar testTransitions[][4] = { + { 0.25f, 0.1f, 0.25f, 1 }, // ease + { 0.42f, 0, 1, 1 }, // ease in + { 0, 0, 0.58f, 1 }, // ease out + { 0.42f, 0, 0.58f, 1 }, // ease in out + }; + + const SkScalar expectedOutput[][5] = { + { 0.0947876f, 0.513367f, 0.80249f, 0.940796f, 0.994263f }, // ease + { 0.0170288f, 0.129639f, 0.31543f, 0.554749f, 0.839417f }, // ease in + { 0.160583f, 0.445251f, 0.684692f, 0.870361f, 0.982971f }, // ease out + { 0.0197144f, 0.187439f, 0.500122f, 0.812561f, 0.980286f }, // ease in out + }; + + int i = 0; + for (const SkScalar* t : testTransitions) { + int j = 0; + for (SkScalar val = 0.1f; val < 1; val += 0.2f) { + REPORTER_ASSERT(reporter, SkScalarNearlyEqual(expectedOutput[i][j++], + SkUnitCubicInterp(val, t[0], t[1], t[2], t[3]))); + } + ++i; + SkDebugf("\n"); + } } -- cgit v1.2.3