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lottie: fixed a repeater opacity logic

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preserve the target opacity by multiplying,
do not overwrite it.
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Hermet Park 2025-06-09 18:42:56 +09:00 • committed by Hermet Park
parent 6c1b388d77
commit a2665cbab7
2 changed files with 3 additions and 8 deletions
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10
src/loaders/lottie/tvgLottieBuilder.cpp
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@ -352,13 +352,11 @@ static void _repeat(LottieGroup* parent, Shape* path, RenderContext* ctx)
for (int i = 0; i < repeater->cnt; ++i) {
auto multiplier = repeater->offset + static_cast<float>(i);
ARRAY_FOREACH(p, propagators) {
auto shape = static_cast<Shape*>((*p)->duplicate());
SHAPE(shape)->rs.path = SHAPE(path)->rs.path;
auto opacity = repeater->interpOpacity ? tvg::lerp<uint8_t>(repeater->startOpacity, repeater->endOpacity, static_cast<float>(i + 1) / repeater->cnt) : repeater->startOpacity;
shape->opacity(opacity);
auto opacity = tvg::lerp<uint8_t>(repeater->startOpacity, repeater->endOpacity, static_cast<float>(i + 1) / repeater->cnt);
shape->opacity(MULTIPLY((*p)->opacity(), opacity));
Matrix m;
tvg::identity(&m);
@ -366,11 +364,10 @@ static void _repeat(LottieGroup* parent, Shape* path, RenderContext* ctx)
scale(&m, {powf(repeater->scale.x * 0.01f, multiplier), powf(repeater->scale.y * 0.01f, multiplier)});
rotate(&m, repeater->rotation * multiplier);
translateR(&m, -repeater->anchor);
m = repeater->transform * m;
Matrix inv;
inverse(&repeater->transform, &inv);
shape->transform(m * (inv * shape->transform()));
shape->transform((repeater->transform * m) * (inv * shape->transform()));
shapes.push(shape);
}
}
@ -739,7 +736,6 @@ void LottieBuilder::updateRepeater(TVG_UNUSED LottieGroup* parent, LottieObject*
r.startOpacity = repeater->startOpacity(frameNo, tween, exps);
r.endOpacity = repeater->endOpacity(frameNo, tween, exps);
r.inorder = repeater->inorder;
r.interpOpacity = (r.startOpacity == r.endOpacity) ? false : true;
ctx->repeaters.push(r);
ctx->merging = nullptr;

1
src/loaders/lottie/tvgLottieBuilder.h
View file

@ -42,7 +42,6 @@ struct RenderRepeater
float rotation;
uint8_t startOpacity;
uint8_t endOpacity;
bool interpOpacity;
bool inorder;
};