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lottie: repeater transformation fix

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In the case of a transformation (denoted as T1)
appearing after the repeater, but at the same
level of nesting, the objects to which the repeater
is applied should not consider T1. However,
the transformation of the repeater itself should
take T1 into account.
Also, it is possible to have several consecutive
repeaters, and all of them should be taken into
account. Until now, the last one was overwriting
the previous one.
This commit is contained in:
Mira Grudzinska 2024-05-28 13:13:36 +02:00 • committed by Hermet Park
parent e69cc2b936
commit bf29289b3c
1 changed files with 65 additions and 50 deletions
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115
src/loaders/lottie/tvgLottieBuilder.cpp
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@ -40,6 +40,7 @@
struct RenderRepeater
{
int cnt;
Matrix transform;
float offset;
Point position;
Point anchor;
@ -59,7 +60,7 @@ struct RenderContext
Shape* propagator = nullptr;
Shape* merging = nullptr; //merging shapes if possible (if shapes have same properties)
LottieObject** begin = nullptr; //iteration entry point
RenderRepeater* repeater = nullptr;
Array<RenderRepeater> repeaters;
Matrix* transform = nullptr;
float roundness = 0.0f;
bool fragmenting = false; //render context has been fragmented by filling
@ -74,7 +75,6 @@ struct RenderContext
~RenderContext()
{
if (ownPropagator) delete(propagator);
delete(repeater);
free(transform);
}
@ -88,9 +88,8 @@ struct RenderContext
propagator = static_cast<Shape*>(rhs.propagator->duplicate());
}
if (rhs.repeater) {
repeater = new RenderRepeater();
*repeater = *rhs.repeater;
for (auto repeater = rhs.repeaters.begin(); repeater < rhs.repeaters.end(); ++repeater) {
repeaters.push(*repeater);
}
roundness = rhs.roundness;
}
@ -392,46 +391,59 @@ static Shape* _draw(LottieGroup* parent, RenderContext* ctx)
//OPTIMIZE: path?
static void _repeat(LottieGroup* parent, unique_ptr<Shape> path, RenderContext* ctx)
{
auto repeater = ctx->repeater;
Array<Shape*> propagators;
propagators.push(ctx->propagator);
Array<Shape*> shapes;
Array<Shape*> shapes(repeater->cnt);
for (auto repeater = ctx->repeaters.end() - 1; repeater >= ctx->repeaters.begin(); --repeater) {
shapes.reserve(repeater->cnt);
for (int i = 0; i < repeater->cnt; ++i) {
auto multiplier = repeater->offset + static_cast<float>(i);
for (int i = 0; i < repeater->cnt; ++i) {
auto multiplier = repeater->offset + static_cast<float>(i);
auto shape = static_cast<Shape*>(ctx->propagator->duplicate());
P(shape)->rs.path = P(path.get())->rs.path;
for (auto propagator = propagators.begin(); propagator < propagators.end(); ++propagator) {
auto shape = static_cast<Shape*>((*propagator)->duplicate());
P(shape)->rs.path = P(path.get())->rs.path;
auto opacity = repeater->interpOpacity ? mathLerp<uint8_t>(repeater->startOpacity, repeater->endOpacity, static_cast<float>(i + 1) / repeater->cnt) : repeater->startOpacity;
shape->opacity(opacity);
auto opacity = repeater->interpOpacity ? mathLerp<uint8_t>(repeater->startOpacity, repeater->endOpacity, static_cast<float>(i + 1) / repeater->cnt) : repeater->startOpacity;
shape->opacity(opacity);
Matrix m;
mathIdentity(&m);
mathTranslate(&m, repeater->position.x * multiplier + repeater->anchor.x, repeater->position.y * multiplier + repeater->anchor.y);
mathScale(&m, powf(repeater->scale.x * 0.01f, multiplier), powf(repeater->scale.y * 0.01f, multiplier));
mathRotate(&m, repeater->rotation * multiplier);
mathTranslateR(&m, -repeater->anchor.x, -repeater->anchor.y);
Matrix m;
mathIdentity(&m);
mathTranslate(&m, repeater->position.x * multiplier + repeater->anchor.x, repeater->position.y * multiplier + repeater->anchor.y);
mathScale(&m, powf(repeater->scale.x * 0.01f, multiplier), powf(repeater->scale.y * 0.01f, multiplier));
mathRotate(&m, repeater->rotation * multiplier);
mathTranslateR(&m, -repeater->anchor.x, -repeater->anchor.y);
m = repeater->transform * m;
auto pm = PP(shape)->transform();
shape->transform(pm ? (m * *pm) : m);
auto pm = PP(shape)->transform();
if (pm) {
Matrix inverse;
mathInverse(&repeater->transform, &inverse);
*pm = inverse * *pm;
}
if (ctx->roundness > 1.0f && P(shape)->rs.stroke) {
TVGERR("LOTTIE", "FIXME: Path roundesss should be applied properly!");
P(shape)->rs.stroke->join = StrokeJoin::Round;
shape->transform(pm ? m * *pm : m);
shapes.push(shape);
}
}
shapes.push(shape);
}
propagators.clear();
propagators.reserve(shapes.count);
//push repeat shapes in order.
if (repeater->inorder) {
for (auto shape = shapes.begin(); shape < shapes.end(); ++shape) {
parent->scene->push(cast(*shape));
}
} else {
for (auto shape = shapes.end() - 1; shape >= shapes.begin(); --shape) {
parent->scene->push(cast(*shape));
//push repeat shapes in order.
if (repeater->inorder) {
for (auto shape = shapes.begin(); shape < shapes.end(); ++shape) {
parent->scene->push(cast(*shape));
propagators.push(*shape);
}
} else {
for (auto shape = shapes.end() - 1; shape >= shapes.begin(); --shape) {
parent->scene->push(cast(*shape));
propagators.push(*shape);
}
}
shapes.clear();
}
}
@ -504,7 +516,7 @@ static void _updateRect(LottieGroup* parent, LottieObject** child, float frameNo
if (roundness > size.y * 0.5f) roundness = size.y * 0.5f;
}
if (ctx->repeater) {
if (!ctx->repeaters.empty()) {
auto path = Shape::gen();
_appendRect(path.get(), position.x - size.x * 0.5f, position.y - size.y * 0.5f, size.x, size.y, roundness, ctx->transform);
_repeat(parent, std::move(path), ctx);
@ -552,7 +564,7 @@ static void _updateEllipse(LottieGroup* parent, LottieObject** child, float fram
auto position = ellipse->position(frameNo, exps);
auto size = ellipse->size(frameNo, exps);
if (ctx->repeater) {
if (!ctx->repeaters.empty()) {
auto path = Shape::gen();
_appendCircle(path.get(), position.x, position.y, size.x * 0.5f, size.y * 0.5f, ctx->transform);
_repeat(parent, std::move(path), ctx);
@ -567,7 +579,7 @@ static void _updatePath(LottieGroup* parent, LottieObject** child, float frameNo
{
auto path = static_cast<LottiePath*>(*child);
if (ctx->repeater) {
if (!ctx->repeaters.empty()) {
auto p = Shape::gen();
path->pathset(frameNo, P(p)->rs.path.cmds, P(p)->rs.path.pts, ctx->transform, ctx->roundness, exps);
_repeat(parent, std::move(p), ctx);
@ -923,7 +935,7 @@ static void _updatePolystar(LottieGroup* parent, LottieObject** child, float fra
auto identity = mathIdentity((const Matrix*)&matrix);
if (ctx->repeater) {
if (!ctx->repeaters.empty()) {
auto p = Shape::gen();
if (star->type == LottiePolyStar::Star) _updateStar(parent, star, identity ? nullptr : &matrix, ctx->roundness, frameNo, p.get(), exps);
else _updatePolygon(parent, star, identity ? nullptr : &matrix, frameNo, p.get(), exps);
@ -988,17 +1000,20 @@ static void _updateRepeater(TVG_UNUSED LottieGroup* parent, LottieObject** child
{
auto repeater= static_cast<LottieRepeater*>(*child);
if (!ctx->repeater) ctx->repeater = new RenderRepeater();
ctx->repeater->cnt = static_cast<int>(repeater->copies(frameNo, exps));
ctx->repeater->offset = repeater->offset(frameNo, exps);
ctx->repeater->position = repeater->position(frameNo, exps);
ctx->repeater->anchor = repeater->anchor(frameNo, exps);
ctx->repeater->scale = repeater->scale(frameNo, exps);
ctx->repeater->rotation = repeater->rotation(frameNo, exps);
ctx->repeater->startOpacity = repeater->startOpacity(frameNo, exps);
ctx->repeater->endOpacity = repeater->endOpacity(frameNo, exps);
ctx->repeater->inorder = repeater->inorder;
ctx->repeater->interpOpacity = (ctx->repeater->startOpacity == ctx->repeater->endOpacity) ? false : true;
RenderRepeater r;
r.cnt = static_cast<int>(repeater->copies(frameNo, exps));
if (auto tr = PP(ctx->propagator)->transform()) r.transform = *tr;
else mathIdentity(&r.transform);
r.offset = repeater->offset(frameNo, exps);
r.position = repeater->position(frameNo, exps);
r.anchor = repeater->anchor(frameNo, exps);
r.scale = repeater->scale(frameNo, exps);
r.rotation = repeater->rotation(frameNo, exps);
r.startOpacity = repeater->startOpacity(frameNo, exps);
r.endOpacity = repeater->endOpacity(frameNo, exps);
r.inorder = repeater->inorder;
r.interpOpacity = (r.startOpacity == r.endOpacity) ? false : true;
ctx->repeaters.push(r);
ctx->merging = nullptr;
}
@ -1006,7 +1021,7 @@ static void _updateRepeater(TVG_UNUSED LottieGroup* parent, LottieObject** child
static void _updateTrimpath(TVG_UNUSED LottieGroup* parent, LottieObject** child, float frameNo, TVG_UNUSED Inlist<RenderContext>& contexts, RenderContext* ctx, LottieExpressions* exps)
{
auto trimpath= static_cast<LottieTrimpath*>(*child);
auto trimpath = static_cast<LottieTrimpath*>(*child);
float begin, end;
trimpath->segment(frameNo, begin, end, exps);