/* * Copyright 2014 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "include/utils/SkInterpolator.h" #include "tests/Test.h" static SkScalar* iset(SkScalar array[3], int a, int b, int c) { array[0] = SkIntToScalar(a); array[1] = SkIntToScalar(b); array[2] = SkIntToScalar(c); return array; } DEF_TEST(Interpolator, reporter) { SkInterpolator inter(3, 2); SkScalar v1[3], v2[3], v[3]; SkInterpolator::Result result; inter.setKeyFrame(0, 100, iset(v1, 10, 20, 30), nullptr); inter.setKeyFrame(1, 200, iset(v2, 110, 220, 330)); result = inter.timeToValues(0, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kFreezeStart_Result); REPORTER_ASSERT(reporter, memcmp(v, v1, sizeof(v)) == 0); result = inter.timeToValues(99, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kFreezeStart_Result); REPORTER_ASSERT(reporter, memcmp(v, v1, sizeof(v)) == 0); result = inter.timeToValues(100, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); REPORTER_ASSERT(reporter, memcmp(v, v1, sizeof(v)) == 0); result = inter.timeToValues(200, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); REPORTER_ASSERT(reporter, memcmp(v, v2, sizeof(v)) == 0); result = inter.timeToValues(201, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kFreezeEnd_Result); REPORTER_ASSERT(reporter, memcmp(v, v2, sizeof(v)) == 0); result = inter.timeToValues(150, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); // Found failing when we re-enabled this test: #if 0 SkScalar vv[3]; REPORTER_ASSERT(reporter, memcmp(v, iset(vv, 60, 120, 180), sizeof(v)) == 0); #endif result = inter.timeToValues(125, v); REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); 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; } }