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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "PropertyValuesHolder.h"
#include "utils/Color.h"
#include "utils/VectorDrawableUtils.h"
#include <utils/Log.h>
namespace android {
namespace uirenderer {
using namespace VectorDrawable;
inline constexpr float lerp(float fromValue, float toValue, float fraction) {
return float(fromValue * (1 - fraction) + toValue * fraction);
}
inline constexpr float linearize(U8CPU component) {
return EOCF_sRGB(component / 255.0f);
}
// TODO: Add a test for this
void ColorEvaluator::evaluate(SkColor* outColor, const SkColor& fromColor, const SkColor& toColor,
float fraction) const {
float a = lerp(SkColorGetA(fromColor) / 255.0f, SkColorGetA(toColor) / 255.0f, fraction);
float r = lerp(linearize(SkColorGetR(fromColor)), linearize(SkColorGetR(toColor)), fraction);
float g = lerp(linearize(SkColorGetG(fromColor)), linearize(SkColorGetG(toColor)), fraction);
float b = lerp(linearize(SkColorGetB(fromColor)), linearize(SkColorGetB(toColor)), fraction);
*outColor = SkColorSetARGB((U8CPU)roundf(a * 255.0f), (U8CPU)roundf(OECF_sRGB(r) * 255.0f),
(U8CPU)roundf(OECF_sRGB(g) * 255.0f),
(U8CPU)roundf(OECF_sRGB(b) * 255.0f));
}
void PathEvaluator::evaluate(PathData* out, const PathData& from, const PathData& to,
float fraction) const {
VectorDrawableUtils::interpolatePaths(out, from, to, fraction);
}
template <typename T>
const T PropertyValuesHolderImpl<T>::getValueFromData(float fraction) const {
if (mDataSource.size() == 0) {
LOG_ALWAYS_FATAL("No data source is defined");
return 0;
}
if (fraction <= 0.0f) {
return mDataSource.front();
}
if (fraction >= 1.0f) {
return mDataSource.back();
}
fraction *= mDataSource.size() - 1;
int lowIndex = floor(fraction);
fraction -= lowIndex;
T value;
mEvaluator->evaluate(&value, mDataSource[lowIndex], mDataSource[lowIndex + 1], fraction);
return value;
}
template <typename T>
const T PropertyValuesHolderImpl<T>::calculateAnimatedValue(float fraction) const {
if (mDataSource.size() > 0) {
return getValueFromData(fraction);
} else {
T value;
mEvaluator->evaluate(&value, mStartValue, mEndValue, fraction);
return value;
}
}
void GroupPropertyValuesHolder::setFraction(float fraction) {
float animatedValue = calculateAnimatedValue(fraction);
mGroup->mutateProperties()->setPropertyValue(mPropertyId, animatedValue);
}
void FullPathColorPropertyValuesHolder::setFraction(float fraction) {
SkColor animatedValue = calculateAnimatedValue(fraction);
mFullPath->mutateProperties()->setColorPropertyValue(mPropertyId, animatedValue);
}
void FullPathPropertyValuesHolder::setFraction(float fraction) {
float animatedValue = calculateAnimatedValue(fraction);
mFullPath->mutateProperties()->setPropertyValue(mPropertyId, animatedValue);
}
void PathDataPropertyValuesHolder::setFraction(float fraction) {
mEvaluator->evaluate(&mPathData, mStartValue, mEndValue, fraction);
mPath->mutateProperties()->setData(mPathData);
}
void RootAlphaPropertyValuesHolder::setFraction(float fraction) {
float animatedValue = calculateAnimatedValue(fraction);
mTree->mutateProperties()->setRootAlpha(animatedValue);
}
} // namepace uirenderer
} // namespace android
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