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lottie/builder: revise the masking update.

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Append the mask shape to the previous one, instead of composition,
when it's able by the condition.

issue: https://github.com/thorvg/thorvg/issues/2426
This commit is contained in:
Hermet Park 2024-07-02 13:59:39 +09:00 • committed by Hermet Park
parent 29325c0ff9
commit 269ef22a97
1 changed files with 27 additions and 32 deletions
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49
src/loaders/lottie/tvgLottieBuilder.cpp
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@ -1144,44 +1144,39 @@ static void _updateMaskings(LottieLayer* layer, float frameNo, LottieExpressions
{
if (layer->masks.count == 0) return;
//maskings
Shape* pmask = nullptr;
auto pmethod = CompositeMethod::None;
//Apply the base mask
auto pMask = static_cast<LottieMask*>(layer->masks[0]);
auto pMethod = pMask->method;
for (auto m = layer->masks.begin(); m < layer->masks.end(); ++m) {
auto pShape = Shape::gen().release();
pShape->fill(255, 255, 255, pMask->opacity(frameNo));
pShape->transform(layer->cache.matrix);
if (pMask->pathset(frameNo, P(pShape)->rs.path.cmds, P(pShape)->rs.path.pts, nullptr, 0.0f, exps)) {
P(pShape)->update(RenderUpdateFlag::Path);
}
layer->scene->composite(tvg::cast(pShape), (pMethod == CompositeMethod::SubtractMask) ? CompositeMethod::InvAlphaMask : CompositeMethod::AlphaMask);
//Apply the subsquent masks
for (auto m = layer->masks.begin() + 1; m < layer->masks.end(); ++m) {
auto mask = static_cast<LottieMask*>(*m);
auto method = mask->method;
if (method == CompositeMethod::None) continue;
//FIXME: None method mask should be appended to the root layer?
if (method == CompositeMethod::None) {
pmethod = method;
continue;
}
//Masking shape
//Append the mask shape
if (pMethod == method && (method == CompositeMethod::SubtractMask || method == CompositeMethod::DifferenceMask)) {
mask->pathset(frameNo, P(pShape)->rs.path.cmds, P(pShape)->rs.path.pts, nullptr, 0.0f, exps);
//Chain composition
} else {
auto shape = Shape::gen().release();
shape->fill(255, 255, 255, mask->opacity(frameNo));
shape->transform(layer->cache.matrix);
if (mask->pathset(frameNo, P(shape)->rs.path.cmds, P(shape)->rs.path.pts, nullptr, 0.0f, exps)) {
P(shape)->update(RenderUpdateFlag::Path);
}
//Append the chain-masking composition
if (pmask) {
//false of false is true. invert?
if (pmethod == method) {
if (method == CompositeMethod::SubtractMask) method = CompositeMethod::AddMask;
else if (method == CompositeMethod::DifferenceMask) method = CompositeMethod::IntersectMask;
pShape->composite(tvg::cast(shape), method);
pShape = shape;
pMethod = method;
}
pmask->composite(cast<Shape>(shape), method);
//Apply the masking
} else {
method = (method == CompositeMethod::SubtractMask) ? CompositeMethod::InvAlphaMask : CompositeMethod::AlphaMask;
layer->scene->composite(cast<Shape>(shape), method);
}
pmethod = mask->method;
pmask = shape;
}
}