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, const SkColor& fromColor, const SkColor& toColor,
39 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((U8CPU)roundf(a * 255.0f), (U8CPU)roundf(OECF_sRGB(r) * 255.0f),
45 (U8CPU)roundf(OECF_sRGB(g) * 255.0f),
46 (U8CPU)roundf(OECF_sRGB(b) * 255.0f));
47 }
48
evaluate(PathData * out,const PathData & from,const PathData & to,float fraction) const49 void PathEvaluator::evaluate(PathData* out, const PathData& from, const PathData& to,
50 float fraction) const {
51 VectorDrawableUtils::interpolatePaths(out, from, to, fraction);
52 }
53
54 template <typename T>
getValueFromData(float fraction) const55 const T PropertyValuesHolderImpl<T>::getValueFromData(float fraction) const {
56 if (mDataSource.size() == 0) {
57 LOG_ALWAYS_FATAL("No data source is defined");
58 return 0;
59 }
60 if (fraction <= 0.0f) {
61 return mDataSource.front();
62 }
63 if (fraction >= 1.0f) {
64 return mDataSource.back();
65 }
66
67 fraction *= mDataSource.size() - 1;
68 int lowIndex = floor(fraction);
69 fraction -= lowIndex;
70
71 T value;
72 mEvaluator->evaluate(&value, mDataSource[lowIndex], mDataSource[lowIndex + 1], fraction);
73 return value;
74 }
75
76 template <typename T>
calculateAnimatedValue(float fraction) const77 const T PropertyValuesHolderImpl<T>::calculateAnimatedValue(float fraction) const {
78 if (mDataSource.size() > 0) {
79 return getValueFromData(fraction);
80 } else {
81 T value;
82 mEvaluator->evaluate(&value, mStartValue, mEndValue, fraction);
83 return value;
84 }
85 }
86
setFraction(float fraction)87 void GroupPropertyValuesHolder::setFraction(float fraction) {
88 float animatedValue = calculateAnimatedValue(fraction);
89 mGroup->mutateProperties()->setPropertyValue(mPropertyId, animatedValue);
90 }
91
setFraction(float fraction)92 void FullPathColorPropertyValuesHolder::setFraction(float fraction) {
93 SkColor animatedValue = calculateAnimatedValue(fraction);
94 mFullPath->mutateProperties()->setColorPropertyValue(mPropertyId, animatedValue);
95 }
96
setFraction(float fraction)97 void FullPathPropertyValuesHolder::setFraction(float fraction) {
98 float animatedValue = calculateAnimatedValue(fraction);
99 mFullPath->mutateProperties()->setPropertyValue(mPropertyId, animatedValue);
100 }
101
setFraction(float fraction)102 void PathDataPropertyValuesHolder::setFraction(float fraction) {
103 mEvaluator->evaluate(&mPathData, mStartValue, mEndValue, fraction);
104 mPath->mutateProperties()->setData(mPathData);
105 }
106
setFraction(float fraction)107 void RootAlphaPropertyValuesHolder::setFraction(float fraction) {
108 float animatedValue = calculateAnimatedValue(fraction);
109 mTree->mutateProperties()->setRootAlpha(animatedValue);
110 }
111
112 } // namepace uirenderer
113 } // namespace android
114