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lottie: fixed a corrupted colorstop population

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the color stop number should be retained during
the population of frames

issue: https://github.com/thorvg/thorvg/issues/2765
This commit is contained in:
Hermet Park 2024-10-03 13:07:29 +09:00
parent 1c48cd3cdc
commit 2b3a2e5ddf
2 changed files with 9 additions and 8 deletions
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9
src/loaders/lottie/tvgLottieModel.cpp
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@ -183,15 +183,14 @@ void LottieTrimpath::segment(float frameNo, float& start, float& end, LottieExpr
}
uint32_t LottieGradient::populate(ColorStop& color)
uint32_t LottieGradient::populate(ColorStop& color, size_t count)
{
colorStops.populated = true;
if (!color.input) return 0;
uint32_t alphaCnt = (color.input->count - (colorStops.count * 4)) / 2;
Array<Fill::ColorStop> output(colorStops.count + alphaCnt);
uint32_t alphaCnt = (color.input->count - (count * 4)) / 2;
Array<Fill::ColorStop> output(count + alphaCnt);
uint32_t cidx = 0; //color count
uint32_t clast = colorStops.count * 4;
uint32_t clast = count * 4;
if (clast > color.input->count) clast = color.input->count;
uint32_t aidx = clast; //alpha count
Fill::ColorStop cs;

8
src/loaders/lottie/tvgLottieModel.h
View file

@ -558,13 +558,15 @@ struct LottieGradient : LottieObject
bool prepare()
{
if (!colorStops.populated) {
auto count = colorStops.count; //colorstop count can be modified after population
if (colorStops.frames) {
for (auto v = colorStops.frames->begin(); v < colorStops.frames->end(); ++v) {
colorStops.count = populate(v->value);
colorStops.count = populate(v->value, count);
}
} else {
colorStops.count = populate(colorStops.value);
colorStops.count = populate(colorStops.value, count);
}
colorStops.populated = true;
}
if (start.frames || end.frames || height.frames || angle.frames || opacity.frames || colorStops.frames) return true;
return false;
@ -582,7 +584,7 @@ struct LottieGradient : LottieObject
}
uint32_t populate(ColorStop& color);
uint32_t populate(ColorStop& color, size_t count);
Fill* fill(float frameNo, LottieExpressions* exps);
LottiePoint start = Point{0.0f, 0.0f};