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lottie/feature: Added timeRemap feature implementation.

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Change-Id: I89df91f3cc709fa8fa392586218676770c0aac84
This commit is contained in:
subhransu mohanty 2018-10-23 09:46:20 +09:00
parent 416adb599e
commit 4da0782f60
3 changed files with 24 additions and 6 deletions
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10
src/lottie/lottieitem.cpp
View File

@ -254,21 +254,21 @@ void LOTLayerItem::updateStaticProperty()
mStatic = mPrecompLayer ? (mStatic & mPrecompLayer->isStatic()) : mStatic;
}
void LOTLayerItem::update(int frameNo, const VMatrix &parentMatrix,
void LOTLayerItem::update(int frameNumber, const VMatrix &parentMatrix,
float parentAlpha)
{
mFrameNo = frameNo;
mFrameNo = mLayerData->timeRemap(frameNumber);
// 1. check if the layer is part of the current frame
if (!visible()) return;
// 2. calculate the parent matrix and alpha
VMatrix m = matrix(frameNo);
VMatrix m = matrix(frameNo());
m *= parentMatrix;
float alpha = parentAlpha * opacity(frameNo);
float alpha = parentAlpha * opacity(frameNo());
// 6. update the mask
if (hasMask()) {
for (auto &i : mMasks) i->update(frameNo, m, alpha, mDirtyFlag);
for (auto &i : mMasks) i->update(frameNo(), m, alpha, mDirtyFlag);
}
// 3. update the dirty flag based on the change

18
src/lottie/lottiemodel.h
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@ -292,6 +292,7 @@ public:
int solidWidth() const noexcept{return mSolidLayer.mWidth;}
int solidHeight() const noexcept{return mSolidLayer.mHeight;}
LottieColor solidColor() const noexcept{return mSolidLayer.mColor;}
int timeRemap(int frameNo) const;
public:
struct SolidLayer {
int mWidth{0};
@ -318,6 +319,7 @@ public:
bool mHasGradient{false};
bool mRoot{false};
std::vector<std::shared_ptr<LOTMaskData>> mMasks;
LOTCompositionData *mCompRef;
};
class LOTCompositionData : public LOTData
@ -334,6 +336,9 @@ public:
return isStatic() ? startFrame() :
startFrame() + pos * frameDuration();
}
long frameAtTime(double timeInSec) const {
return isStatic() ? startFrame() : frameAtPos(timeInSec / duration());
}
long frameDuration() const {return mEndFrame - mStartFrame -1;}
float frameRate() const {return mFrameRate;}
long startFrame() const {return mStartFrame;}
@ -355,6 +360,19 @@ public:
};
/**
* TimeRemap has the value in time domain(in sec)
* To get the proper mapping first we get the mapped time at the current frame Number
* then we need to convert mapped time to frame number using the composition time line
* Ex: at frame 10 the mappend time is 0.5(500 ms) which will be convert to frame number
* 30 if the frame rate is 60. or will result to frame number 15 if the frame rate is 30.
*/
inline int LOTLayerData::timeRemap(int frameNo) const
{
return mTimeRemap.isStatic() ? frameNo :
mCompRef->frameAtTime(mTimeRemap.value(frameNo));
}
class LOTTransformData : public LOTData
{
public:

2
src/lottie/lottieparser.cpp
View File

@ -810,7 +810,7 @@ std::shared_ptr<LOTData> LottieParserImpl::parseLayer()
layer->setStatic(staticFlag && layer->mTransform->isStatic() &&
!hasLayerRef);
layer->mCompRef = compRef;
return sharedLayer;
}