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, 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 51 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> 57 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> 79 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 89 void GroupPropertyValuesHolder::setFraction(float fraction) { 90 float animatedValue = calculateAnimatedValue(fraction); 91 mGroup->mutateProperties()->setPropertyValue(mPropertyId, animatedValue); 92 } 93 94 void FullPathColorPropertyValuesHolder::setFraction(float fraction) { 95 SkColor animatedValue = calculateAnimatedValue(fraction); 96 mFullPath->mutateProperties()->setColorPropertyValue(mPropertyId, animatedValue); 97 } 98 99 void FullPathPropertyValuesHolder::setFraction(float fraction) { 100 float animatedValue = calculateAnimatedValue(fraction); 101 mFullPath->mutateProperties()->setPropertyValue(mPropertyId, animatedValue); 102 } 103 104 void PathDataPropertyValuesHolder::setFraction(float fraction) { 105 mEvaluator->evaluate(&mPathData, mStartValue, mEndValue, fraction); 106 mPath->mutateProperties()->setData(mPathData); 107 } 108 109 void RootAlphaPropertyValuesHolder::setFraction(float fraction) { 110 float animatedValue = calculateAnimatedValue(fraction); 111 mTree->mutateProperties()->setRootAlpha(animatedValue); 112 } 113 114 } // namepace uirenderer 115 } // namespace android 116
