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 29 inline constexpr float lerp(float fromValue, float toValue, float fraction) { 30 return float(fromValue * (1 - fraction) + toValue * fraction); 31 } 32 33 inline constexpr float linearize(U8CPU component) { 34 return EOCF_sRGB(component / 255.0f); 35 } 36 37 // TODO: Add a test for this 38 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 49 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> 55 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> 77 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 87 void GroupPropertyValuesHolder::setFraction(float fraction) { 88 float animatedValue = calculateAnimatedValue(fraction); 89 mGroup->mutateProperties()->setPropertyValue(mPropertyId, animatedValue); 90 } 91 92 void FullPathColorPropertyValuesHolder::setFraction(float fraction) { 93 SkColor animatedValue = calculateAnimatedValue(fraction); 94 mFullPath->mutateProperties()->setColorPropertyValue(mPropertyId, animatedValue); 95 } 96 97 void FullPathPropertyValuesHolder::setFraction(float fraction) { 98 float animatedValue = calculateAnimatedValue(fraction); 99 mFullPath->mutateProperties()->setPropertyValue(mPropertyId, animatedValue); 100 } 101 102 void PathDataPropertyValuesHolder::setFraction(float fraction) { 103 mEvaluator->evaluate(&mPathData, mStartValue, mEndValue, fraction); 104 mPath->mutateProperties()->setData(mPathData); 105 } 106 107 void RootAlphaPropertyValuesHolder::setFraction(float fraction) { 108 float animatedValue = calculateAnimatedValue(fraction); 109 mTree->mutateProperties()->setRootAlpha(animatedValue); 110 } 111 112 } // namepace uirenderer 113 } // namespace android 114
