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lottie: support for individual trim operation.

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Change-Id: I421c073c0d0f907d07107de5eb0ee141a8d16ebe
This commit is contained in:
subhransu mohanty
2018-11-16 19:37:30 +09:00
parent 15b256d1bf
commit f1d1ace699
1 changed files with 80 additions and 7 deletions
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87
src/lottie/lottieitem.cpp
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@@ -966,14 +966,87 @@ void LOTTrimItem::update()
// when both path and trim are not dirty
if (!(mDirty || pathDirty())) return;
//@TODO take the offset and trim type into account.
for (auto &i : mPathItems) {
VPathMesure pm;
pm.setStart(mCache.mStart);
pm.setEnd(mCache.mEnd);
pm.setOffset(mCache.mOffset);
i->updatePath(pm.trim(i->localPath()));
if (vCompare(std::fabs(mCache.mStart - mCache.mEnd) , 1)) return;
if (vCompare(mCache.mStart, mCache.mEnd)) {
for (auto &i : mPathItems) {
i->updatePath(VPath());
}
return;
}
if (mData->type() == LOTTrimData::TrimType::Simultaneously) {
for (auto &i : mPathItems) {
VPathMesure pm;
pm.setStart(mCache.mStart);
pm.setEnd(mCache.mEnd);
pm.setOffset(mCache.mOffset);
i->updatePath(pm.trim(i->localPath()));
}
} else { // LOTTrimData::TrimType::Individually
float totalLength = 0.0;
for (auto &i : mPathItems) {
totalLength += i->localPath().length();
}
float offset = totalLength * mCache.mOffset;
float start = totalLength * mCache.mStart;
float end = totalLength * mCache.mEnd;
start += offset;
end +=offset;
// normalize start, end value to 0 - totalLength
if (fabs(start) > totalLength) start = fmod(start, totalLength);
if (fabs(end) > totalLength) end = fmod(end, totalLength);
if (start >= 0 && end >= 0) {
if (start > end) std::swap(start, end);
} else if ( start < 0 && end < 0) {
start += totalLength;
end += totalLength;
if (start > end) std::swap(start, end);
} else {
// one is +ve and one is -ve so the
// segment will be wrapped from end segment to start segment.
// we need to split it in two segment.
//@TODO
return;
}
if (start < end ) {
float curLen = 0.0;
for (auto &i : mPathItems) {
if (curLen > end) {
// update with empty path.
i->updatePath(VPath());
continue;
}
float len = i->localPath().length();
if (curLen < start && curLen + len < start) {
curLen += len;
// update with empty path.
i->updatePath(VPath());
continue;
} else if (start <= curLen && end >= curLen + len) {
// inside segment
curLen += len;
continue;
} else {
float local_start = start > curLen ? start - curLen : 0;
local_start /= len;
float local_end = curLen + len < end ? len : end - curLen;
local_end /= len;
VPathMesure pm;
pm.setStart(local_start);
pm.setEnd(local_end);
VPath p = pm.trim(i->localPath());
i->updatePath(p);
curLen += len;
}
}
}
}
}