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lottie: multiply opacity to the fill alpha value,

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opacity of a shape may bring a composition
when it has both stroke and fill
This commit is contained in:
Hermet Park 2024-10-17 15:42:28 +09:00 • committed by Hermet Park
parent 7e8eee6e3b
commit f5af7b13a5
2 changed files with 12 additions and 1 deletions
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1
src/loaders/lottie/tvgLottieBuilder.cpp
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@ -304,7 +304,6 @@ void LottieBuilder::updateGradientFill(LottieGroup* parent, LottieObject** child
//TODO: reuse the fill instance?
ctx->propagator->fill(unique_ptr<Fill>(fill->fill(frameNo, exps)));
ctx->propagator->fill(fill->rule);
ctx->propagator->opacity(MULTIPLY(fill->opacity(frameNo), PP(ctx->propagator)->opacity));
if (ctx->propagator->strokeWidth() > 0) ctx->propagator->order(true);
}

12
src/loaders/lottie/tvgLottieModel.cpp
View file

@ -272,6 +272,9 @@ uint32_t LottieGradient::populate(ColorStop& color, size_t count)
Fill* LottieGradient::fill(float frameNo, LottieExpressions* exps)
{
auto opacity = this->opacity(frameNo);
if (opacity == 0) return nullptr;
Fill* fill = nullptr;
auto s = start(frameNo, exps);
auto e = end(frameNo, exps);
@ -307,6 +310,15 @@ Fill* LottieGradient::fill(float frameNo, LottieExpressions* exps)
colorStops(frameNo, fill, exps);
//multiply the current opacity with the fill
if (opacity < 255) {
const Fill::ColorStop* colorStops;
auto cnt = fill->colorStops(&colorStops);
for (uint32_t i = 0; i < cnt; ++i) {
const_cast<Fill::ColorStop*>(&colorStops[i])->a = MULTIPLY(colorStops[i].a, opacity);
}
}
return fill;
}