1 /* 2 * Copyright 2014 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 8 #include "SkInterpolator.h" 9 10 #include "Test.h" 11 12 static SkScalar* iset(SkScalar array[3], int a, int b, int c) { 13 array[0] = SkIntToScalar(a); 14 array[1] = SkIntToScalar(b); 15 array[2] = SkIntToScalar(c); 16 return array; 17 } 18 19 DEF_TEST(Interpolator, reporter) { 20 SkInterpolator inter(3, 2); 21 SkScalar v1[3], v2[3], v[3]; 22 SkInterpolator::Result result; 23 24 inter.setKeyFrame(0, 100, iset(v1, 10, 20, 30), 0); 25 inter.setKeyFrame(1, 200, iset(v2, 110, 220, 330)); 26 27 result = inter.timeToValues(0, v); 28 REPORTER_ASSERT(reporter, result == SkInterpolator::kFreezeStart_Result); 29 REPORTER_ASSERT(reporter, memcmp(v, v1, sizeof(v)) == 0); 30 31 result = inter.timeToValues(99, v); 32 REPORTER_ASSERT(reporter, result == SkInterpolator::kFreezeStart_Result); 33 REPORTER_ASSERT(reporter, memcmp(v, v1, sizeof(v)) == 0); 34 35 result = inter.timeToValues(100, v); 36 REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); 37 REPORTER_ASSERT(reporter, memcmp(v, v1, sizeof(v)) == 0); 38 39 result = inter.timeToValues(200, v); 40 REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); 41 REPORTER_ASSERT(reporter, memcmp(v, v2, sizeof(v)) == 0); 42 43 result = inter.timeToValues(201, v); 44 REPORTER_ASSERT(reporter, result == SkInterpolator::kFreezeEnd_Result); 45 REPORTER_ASSERT(reporter, memcmp(v, v2, sizeof(v)) == 0); 46 47 result = inter.timeToValues(150, v); 48 REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); 49 50 // Found failing when we re-enabled this test: 51 #if 0 52 SkScalar vv[3]; 53 REPORTER_ASSERT(reporter, memcmp(v, iset(vv, 60, 120, 180), sizeof(v)) == 0); 54 #endif 55 56 result = inter.timeToValues(125, v); 57 REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); 58 result = inter.timeToValues(175, v); 59 REPORTER_ASSERT(reporter, result == SkInterpolator::kNormal_Result); 60 61 for (SkScalar val = -0.1f; val <= 1.1f; val += 0.1f) { 62 REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkTPin(0.f, val, 1.f), 63 SkUnitCubicInterp(val, 1.f/3, 1.f/3, 2.f/3, 2.f/3))); 64 } 65 66 // These numbers come from 67 // http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag. 68 const SkScalar testTransitions[][4] = { 69 { 0.25f, 0.1f, 0.25f, 1 }, // ease 70 { 0.42f, 0, 1, 1 }, // ease in 71 { 0, 0, 0.58f, 1 }, // ease out 72 { 0.42f, 0, 0.58f, 1 }, // ease in out 73 }; 74 75 const SkScalar expectedOutput[][5] = { 76 { 0.0947876f, 0.513367f, 0.80249f, 0.940796f, 0.994263f }, // ease 77 { 0.0170288f, 0.129639f, 0.31543f, 0.554749f, 0.839417f }, // ease in 78 { 0.160583f, 0.445251f, 0.684692f, 0.870361f, 0.982971f }, // ease out 79 { 0.0197144f, 0.187439f, 0.500122f, 0.812561f, 0.980286f }, // ease in out 80 }; 81 82 int i = 0; 83 for (const SkScalar* t : testTransitions) { 84 int j = 0; 85 for (SkScalar val = 0.1f; val < 1; val += 0.2f) { 86 REPORTER_ASSERT(reporter, SkScalarNearlyEqual(expectedOutput[i][j++], 87 SkUnitCubicInterp(val, t[0], t[1], t[2], t[3]))); 88 } 89 ++i; 90 } 91 } 92
