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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/VectorDrawableUtils.h"
#include <utils/Log.h>
namespace android {
namespace uirenderer {
using namespace VectorDrawable;
inline U8CPU lerp(U8CPU fromValue, U8CPU toValue, float fraction) {
return (U8CPU) (fromValue * (1 - fraction) + toValue * fraction);
}
// TODO: Add a test for this
void ColorEvaluator::evaluate(SkColor* outColor,
const SkColor& fromColor, const SkColor& toColor, float fraction) const {
U8CPU alpha = lerp(SkColorGetA(fromColor), SkColorGetA(toColor), fraction);
U8CPU red = lerp(SkColorGetR(fromColor), SkColorGetR(toColor), fraction);
U8CPU green = lerp(SkColorGetG(fromColor), SkColorGetG(toColor), fraction);
U8CPU blue = lerp(SkColorGetB(fromColor), SkColorGetB(toColor), fraction);
*outColor = SkColorSetARGB(alpha, red, green, blue);
}
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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