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 "PropertyValuesHolder.h"
18
19 #include "utils/Color.h"
20 #include "utils/VectorDrawableUtils.h"
21
22 #include <utils/Log.h>
23
24 namespace android {
25 namespace uirenderer {
26
27 using namespace VectorDrawable;
28
lerp(float fromValue,float toValue,float fraction)29 inline constexpr float lerp(float fromValue, float toValue, float fraction) {
30 return float (fromValue * (1 - fraction) + toValue * fraction);
31 }
32
linearize(U8CPU component)33 inline constexpr float linearize(U8CPU component) {
34 return EOCF_sRGB(component / 255.0f);
35 }
36
37 // TODO: Add a test for this
evaluate(SkColor * outColor,const SkColor & fromColor,const SkColor & toColor,float fraction) const38 void ColorEvaluator::evaluate(SkColor* outColor,
39 const SkColor& fromColor, const SkColor& toColor, float fraction) const {
40 float a = lerp(SkColorGetA(fromColor) / 255.0f, SkColorGetA(toColor) / 255.0f, fraction);
41 float r = lerp(linearize(SkColorGetR(fromColor)), linearize(SkColorGetR(toColor)), fraction);
42 float g = lerp(linearize(SkColorGetG(fromColor)), linearize(SkColorGetG(toColor)), fraction);
43 float b = lerp(linearize(SkColorGetB(fromColor)), linearize(SkColorGetB(toColor)), fraction);
44 *outColor = SkColorSetARGB(
45 (U8CPU) roundf(a * 255.0f),
46 (U8CPU) roundf(OECF_sRGB(r) * 255.0f),
47 (U8CPU) roundf(OECF_sRGB(g) * 255.0f),
48 (U8CPU) roundf(OECF_sRGB(b) * 255.0f));
49 }
50
evaluate(PathData * out,const PathData & from,const PathData & to,float fraction) const51 void PathEvaluator::evaluate(PathData* out,
52 const PathData& from, const PathData& to, float fraction) const {
53 VectorDrawableUtils::interpolatePaths(out, from, to, fraction);
54 }
55
56 template<typename T>
getValueFromData(float fraction) const57 const T PropertyValuesHolderImpl<T>::getValueFromData(float fraction) const {
58 if (mDataSource.size() == 0) {
59 LOG_ALWAYS_FATAL("No data source is defined");
60 return 0;
61 }
62 if (fraction <= 0.0f) {
63 return mDataSource.front();
64 }
65 if (fraction >= 1.0f) {
66 return mDataSource.back();
67 }
68
69 fraction *= mDataSource.size() - 1;
70 int lowIndex = floor(fraction);
71 fraction -= lowIndex;
72
73 T value;
74 mEvaluator->evaluate(&value, mDataSource[lowIndex], mDataSource[lowIndex + 1], fraction);
75 return value;
76 }
77
78 template<typename T>
calculateAnimatedValue(float fraction) const79 const T PropertyValuesHolderImpl<T>::calculateAnimatedValue(float fraction) const {
80 if (mDataSource.size() > 0) {
81 return getValueFromData(fraction);
82 } else {
83 T value;
84 mEvaluator->evaluate(&value, mStartValue, mEndValue, fraction);
85 return value;
86 }
87 }
88
setFraction(float fraction)89 void GroupPropertyValuesHolder::setFraction(float fraction) {
90 float animatedValue = calculateAnimatedValue(fraction);
91 mGroup->mutateProperties()->setPropertyValue(mPropertyId, animatedValue);
92 }
93
setFraction(float fraction)94 void FullPathColorPropertyValuesHolder::setFraction(float fraction) {
95 SkColor animatedValue = calculateAnimatedValue(fraction);
96 mFullPath->mutateProperties()->setColorPropertyValue(mPropertyId, animatedValue);
97 }
98
setFraction(float fraction)99 void FullPathPropertyValuesHolder::setFraction(float fraction) {
100 float animatedValue = calculateAnimatedValue(fraction);
101 mFullPath->mutateProperties()->setPropertyValue(mPropertyId, animatedValue);
102 }
103
setFraction(float fraction)104 void PathDataPropertyValuesHolder::setFraction(float fraction) {
105 mEvaluator->evaluate(&mPathData, mStartValue, mEndValue, fraction);
106 mPath->mutateProperties()->setData(mPathData);
107 }
108
setFraction(float fraction)109 void RootAlphaPropertyValuesHolder::setFraction(float fraction) {
110 float animatedValue = calculateAnimatedValue(fraction);
111 mTree->mutateProperties()->setRootAlpha(animatedValue);
112 }
113
114 } // namepace uirenderer
115 } // namespace android
116