xref: /aosp_15_r20/frameworks/base/libs/hwui/Interpolator.h (revision d57664e9bc4670b3ecf6748a746a57c557b6bc9e)
1*d57664e9SAndroid Build Coastguard Worker /*
2*d57664e9SAndroid Build Coastguard Worker  * Copyright (C) 2014 The Android Open Source Project
3*d57664e9SAndroid Build Coastguard Worker  *
4*d57664e9SAndroid Build Coastguard Worker  * Licensed under the Apache License, Version 2.0 (the "License");
5*d57664e9SAndroid Build Coastguard Worker  * you may not use this file except in compliance with the License.
6*d57664e9SAndroid Build Coastguard Worker  * You may obtain a copy of the License at
7*d57664e9SAndroid Build Coastguard Worker  *
8*d57664e9SAndroid Build Coastguard Worker  *      http://www.apache.org/licenses/LICENSE-2.0
9*d57664e9SAndroid Build Coastguard Worker  *
10*d57664e9SAndroid Build Coastguard Worker  * Unless required by applicable law or agreed to in writing, software
11*d57664e9SAndroid Build Coastguard Worker  * distributed under the License is distributed on an "AS IS" BASIS,
12*d57664e9SAndroid Build Coastguard Worker  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*d57664e9SAndroid Build Coastguard Worker  * See the License for the specific language governing permissions and
14*d57664e9SAndroid Build Coastguard Worker  * limitations under the License.
15*d57664e9SAndroid Build Coastguard Worker  */
16*d57664e9SAndroid Build Coastguard Worker #ifndef INTERPOLATOR_H
17*d57664e9SAndroid Build Coastguard Worker #define INTERPOLATOR_H
18*d57664e9SAndroid Build Coastguard Worker 
19*d57664e9SAndroid Build Coastguard Worker #include <stddef.h>
20*d57664e9SAndroid Build Coastguard Worker #include <memory>
21*d57664e9SAndroid Build Coastguard Worker 
22*d57664e9SAndroid Build Coastguard Worker #include <cutils/compiler.h>
23*d57664e9SAndroid Build Coastguard Worker #include <vector>
24*d57664e9SAndroid Build Coastguard Worker 
25*d57664e9SAndroid Build Coastguard Worker namespace android {
26*d57664e9SAndroid Build Coastguard Worker namespace uirenderer {
27*d57664e9SAndroid Build Coastguard Worker 
28*d57664e9SAndroid Build Coastguard Worker class Interpolator {
29*d57664e9SAndroid Build Coastguard Worker public:
~Interpolator()30*d57664e9SAndroid Build Coastguard Worker     virtual ~Interpolator() {}
31*d57664e9SAndroid Build Coastguard Worker 
32*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) = 0;
33*d57664e9SAndroid Build Coastguard Worker 
34*d57664e9SAndroid Build Coastguard Worker     static Interpolator* createDefaultInterpolator();
35*d57664e9SAndroid Build Coastguard Worker 
36*d57664e9SAndroid Build Coastguard Worker protected:
Interpolator()37*d57664e9SAndroid Build Coastguard Worker     Interpolator() {}
38*d57664e9SAndroid Build Coastguard Worker };
39*d57664e9SAndroid Build Coastguard Worker 
40*d57664e9SAndroid Build Coastguard Worker class AccelerateDecelerateInterpolator : public Interpolator {
41*d57664e9SAndroid Build Coastguard Worker public:
42*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
43*d57664e9SAndroid Build Coastguard Worker };
44*d57664e9SAndroid Build Coastguard Worker 
45*d57664e9SAndroid Build Coastguard Worker class AccelerateInterpolator : public Interpolator {
46*d57664e9SAndroid Build Coastguard Worker public:
AccelerateInterpolator(float factor)47*d57664e9SAndroid Build Coastguard Worker     explicit AccelerateInterpolator(float factor) : mFactor(factor), mDoubleFactor(factor * 2) {}
48*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
49*d57664e9SAndroid Build Coastguard Worker 
50*d57664e9SAndroid Build Coastguard Worker private:
51*d57664e9SAndroid Build Coastguard Worker     const float mFactor;
52*d57664e9SAndroid Build Coastguard Worker     const float mDoubleFactor;
53*d57664e9SAndroid Build Coastguard Worker };
54*d57664e9SAndroid Build Coastguard Worker 
55*d57664e9SAndroid Build Coastguard Worker class AnticipateInterpolator : public Interpolator {
56*d57664e9SAndroid Build Coastguard Worker public:
AnticipateInterpolator(float tension)57*d57664e9SAndroid Build Coastguard Worker     explicit AnticipateInterpolator(float tension) : mTension(tension) {}
58*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
59*d57664e9SAndroid Build Coastguard Worker 
60*d57664e9SAndroid Build Coastguard Worker private:
61*d57664e9SAndroid Build Coastguard Worker     const float mTension;
62*d57664e9SAndroid Build Coastguard Worker };
63*d57664e9SAndroid Build Coastguard Worker 
64*d57664e9SAndroid Build Coastguard Worker class AnticipateOvershootInterpolator : public Interpolator {
65*d57664e9SAndroid Build Coastguard Worker public:
AnticipateOvershootInterpolator(float tension)66*d57664e9SAndroid Build Coastguard Worker     explicit AnticipateOvershootInterpolator(float tension) : mTension(tension) {}
67*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
68*d57664e9SAndroid Build Coastguard Worker 
69*d57664e9SAndroid Build Coastguard Worker private:
70*d57664e9SAndroid Build Coastguard Worker     const float mTension;
71*d57664e9SAndroid Build Coastguard Worker };
72*d57664e9SAndroid Build Coastguard Worker 
73*d57664e9SAndroid Build Coastguard Worker class BounceInterpolator : public Interpolator {
74*d57664e9SAndroid Build Coastguard Worker public:
75*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
76*d57664e9SAndroid Build Coastguard Worker };
77*d57664e9SAndroid Build Coastguard Worker 
78*d57664e9SAndroid Build Coastguard Worker class CycleInterpolator : public Interpolator {
79*d57664e9SAndroid Build Coastguard Worker public:
CycleInterpolator(float cycles)80*d57664e9SAndroid Build Coastguard Worker     explicit CycleInterpolator(float cycles) : mCycles(cycles) {}
81*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
82*d57664e9SAndroid Build Coastguard Worker 
83*d57664e9SAndroid Build Coastguard Worker private:
84*d57664e9SAndroid Build Coastguard Worker     const float mCycles;
85*d57664e9SAndroid Build Coastguard Worker };
86*d57664e9SAndroid Build Coastguard Worker 
87*d57664e9SAndroid Build Coastguard Worker class DecelerateInterpolator : public Interpolator {
88*d57664e9SAndroid Build Coastguard Worker public:
DecelerateInterpolator(float factor)89*d57664e9SAndroid Build Coastguard Worker     explicit DecelerateInterpolator(float factor) : mFactor(factor) {}
90*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
91*d57664e9SAndroid Build Coastguard Worker 
92*d57664e9SAndroid Build Coastguard Worker private:
93*d57664e9SAndroid Build Coastguard Worker     const float mFactor;
94*d57664e9SAndroid Build Coastguard Worker };
95*d57664e9SAndroid Build Coastguard Worker 
96*d57664e9SAndroid Build Coastguard Worker class LinearInterpolator : public Interpolator {
97*d57664e9SAndroid Build Coastguard Worker public:
interpolate(float input)98*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override { return input; }
99*d57664e9SAndroid Build Coastguard Worker };
100*d57664e9SAndroid Build Coastguard Worker 
101*d57664e9SAndroid Build Coastguard Worker class OvershootInterpolator : public Interpolator {
102*d57664e9SAndroid Build Coastguard Worker public:
OvershootInterpolator(float tension)103*d57664e9SAndroid Build Coastguard Worker     explicit OvershootInterpolator(float tension) : mTension(tension) {}
104*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
105*d57664e9SAndroid Build Coastguard Worker 
106*d57664e9SAndroid Build Coastguard Worker private:
107*d57664e9SAndroid Build Coastguard Worker     const float mTension;
108*d57664e9SAndroid Build Coastguard Worker };
109*d57664e9SAndroid Build Coastguard Worker 
110*d57664e9SAndroid Build Coastguard Worker class PathInterpolator : public Interpolator {
111*d57664e9SAndroid Build Coastguard Worker public:
PathInterpolator(std::vector<float> && x,std::vector<float> && y)112*d57664e9SAndroid Build Coastguard Worker     explicit PathInterpolator(std::vector<float>&& x, std::vector<float>&& y) : mX(x), mY(y) {}
113*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
114*d57664e9SAndroid Build Coastguard Worker 
115*d57664e9SAndroid Build Coastguard Worker private:
116*d57664e9SAndroid Build Coastguard Worker     std::vector<float> mX;
117*d57664e9SAndroid Build Coastguard Worker     std::vector<float> mY;
118*d57664e9SAndroid Build Coastguard Worker };
119*d57664e9SAndroid Build Coastguard Worker 
120*d57664e9SAndroid Build Coastguard Worker class LUTInterpolator : public Interpolator {
121*d57664e9SAndroid Build Coastguard Worker public:
122*d57664e9SAndroid Build Coastguard Worker     LUTInterpolator(float* values, size_t size);
123*d57664e9SAndroid Build Coastguard Worker     ~LUTInterpolator();
124*d57664e9SAndroid Build Coastguard Worker 
125*d57664e9SAndroid Build Coastguard Worker     virtual float interpolate(float input) override;
126*d57664e9SAndroid Build Coastguard Worker 
127*d57664e9SAndroid Build Coastguard Worker private:
128*d57664e9SAndroid Build Coastguard Worker     std::unique_ptr<float[]> mValues;
129*d57664e9SAndroid Build Coastguard Worker     size_t mSize;
130*d57664e9SAndroid Build Coastguard Worker };
131*d57664e9SAndroid Build Coastguard Worker 
132*d57664e9SAndroid Build Coastguard Worker } /* namespace uirenderer */
133*d57664e9SAndroid Build Coastguard Worker } /* namespace android */
134*d57664e9SAndroid Build Coastguard Worker 
135*d57664e9SAndroid Build Coastguard Worker #endif /* INTERPOLATOR_H */
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