1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <gtest/gtest.h>
18
19#include <Interpolator.h>
20
21namespace android {
22namespace uirenderer {
23
24struct TestData {
25    const std::vector<float> x;
26    const std::vector<float> y;
27    const std::vector<float> inFraction;
28    const std::vector<float> outFraction;
29};
30
31const static TestData sTestDataSet[] = {
32        {
33                // Straight line as a path.
34                {0.0f, 1.0f},
35                {0.0f, 1.0f},
36                {0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f},
37                {0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f},
38        },
39
40        {
41                {
42                        0.0f, 0.5f, 0.5178955f, 0.5341797f, 0.5489991f, 0.5625f, 0.5748291f,
43                        0.5861328f, 0.60625005f, 0.62402344f, 0.640625f, 0.675f, 0.6951172f,
44                        0.71875f, 0.7470703f, 0.78125f, 0.82246095f, 0.84606934f, 0.871875f,
45                        0.9000244f, 0.93066406f, 0.96394044f, 1.0f
46                },
47                {
48                        0.0f, 0.0f, 0.0028686523f, 0.011230469f, 0.024719238f, 0.04296875f,
49                        0.06561279f, 0.092285156f, 0.15625f, 0.2319336f, 0.31640625f, 0.5f,
50                        0.5932617f, 0.68359375f, 0.7680664f, 0.84375f, 0.90771484f, 0.9343872f,
51                        0.95703125f, 0.97528076f, 0.98876953f, 0.99713135f, 1.0f
52                },
53                {
54                        0.0f, 0.03375840187072754f, 0.13503384590148926f, 0.23630905151367188f,
55                        0.336834192276001f, 0.4508626461029053f, 0.564141035079956f,
56                        0.6781694889068604f, 0.7921979427337646f, 0.9054763317108154f, 1.0f
57                },
58                {
59                        0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0459827296435833f,
60                        0.5146934390068054f, 0.8607426285743713f, 0.9776809215545654f, 1.0f
61
62                }
63
64        },
65        {
66                {
67                        0.0f, 0.017895509f, 0.034179688f, 0.048999026f, 0.0625f, 0.0748291f,
68                        0.08613282f, 0.10625f, 0.12402344f, 0.140625f, 0.17500001f, 0.19511719f,
69                        0.21875f, 0.24707031f, 0.28125f, 0.32246095f, 0.34606934f, 0.371875f,
70                        0.4000244f, 0.43066406f, 0.46394044f, 0.5f, 1.0f
71                },
72                {
73                        0.0f, 0.0028686523f, 0.011230469f, 0.024719238f, 0.04296875f, 0.06561279f,
74                        0.092285156f, 0.15625f, 0.2319336f, 0.31640625f, 0.5f, 0.5932617f,
75                        0.68359375f, 0.7680664f, 0.84375f, 0.90771484f, 0.9343872f, 0.95703125f,
76                        0.97528076f, 0.98876953f, 0.99713135f, 1.0f, 1.0f
77                },
78                {
79                        0.0f, 0.102020263671875f, 0.20330810546875f, 0.3165740966796875f,
80                        0.43060302734375f, 0.5318756103515625f, 0.6331634521484375f,
81                        0.746429443359375f, 0.84771728515625f, 0.9617462158203125f, 1.0f
82                },
83                {
84                        0.0f, 0.14280107617378235f, 0.6245699524879456f, 0.8985776901245117f,
85                        0.9887426495552063f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f
86                }
87        },
88
89
90};
91
92static std::vector<float> getX(const TestData& data) {
93    return data.x;
94}
95
96static std::vector<float> getY(const TestData& data) {
97    return data.y;
98}
99
100TEST(Interpolator, pathInterpolation) {
101    for (const TestData& data: sTestDataSet) {
102        PathInterpolator interpolator(getX(data), getY(data));
103        for (size_t i = 0; i < data.inFraction.size(); i++) {
104            EXPECT_FLOAT_EQ(data.outFraction[i], interpolator.interpolate(data.inFraction[i]));
105        }
106    }
107}
108
109}
110}
111