From e7f02de5c46fbaeaf855cfb49c3ecda154752f8e Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Sat, 30 May 2026 13:39:31 +0300
Subject: [PATCH] Added star particles to premium cover top bar behind premium
 star.

---
 .../ui/effects/premium_top_bar.cpp            | 72 +++++++++++++------
 .../SourceFiles/ui/effects/premium_top_bar.h  |  2 +
 2 files changed, 51 insertions(+), 23 deletions(-)

diff --git a/Telegram/SourceFiles/ui/effects/premium_top_bar.cpp b/Telegram/SourceFiles/ui/effects/premium_top_bar.cpp
index db2e7e650b..beb3c6f0d9 100644
--- a/Telegram/SourceFiles/ui/effects/premium_top_bar.cpp
+++ b/Telegram/SourceFiles/ui/effects/premium_top_bar.cpp
@@ -12,6 +12,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/painter.h"
 #include "ui/effects/premium_graphics.h"
 #include "ui/effects/premium_star.h"
+#include "ui/effects/premium_star_particles.h"
 #include "ui/widgets/labels.h"
 #include "ui/wrap/fade_wrap.h"
 #include "ui/rect.h"
@@ -29,6 +30,8 @@ constexpr auto kMinAcceptableContrast = 4.5; // 1.14;
 
 constexpr auto kStar3dScale = 2.;
 
+constexpr auto kStarParticlesFieldScale = 2.2;
+
 [[nodiscard]] QImage ScaleTo(QImage image) {
 	using namespace style;
 	const auto size = image.size();
@@ -123,6 +126,13 @@ TopBar::TopBar(
 			: MiniStarsType::BiStars) {
 	if (descriptor.use3dStar && Star::Supported()) {
 		_star3d = CreateChild<Star>(this);
+		_starParticles3d = std::make_unique<StarParticles>([=](
+				const QRect &area) {
+			update(area);
+		});
+		_star3d->flungStrength() | rpl::on_next([=](float64 strength) {
+			_starParticles3d->fling(strength);
+		}, lifetime());
 	}
 
 	std::move(
@@ -183,13 +193,14 @@ TopBar::TopBar(
 				_star3d->setColors(
 					QColor(255, 255, 255),
 					QColor(0xE3, 0xEC, 0xFA));
+				_starParticles3d->setColor(QColor(255, 255, 255));
 			} else {
 				const auto stops = descriptor.gradientStops
 					? (*descriptor.gradientStops)
 					: Ui::Premium::ButtonGradientStops();
-				_star3d->setColors(
-					stops.front().second,
-					stops.back().second);
+				const auto middle = stops[stops.size() / 2].second;
+				_star3d->setColors(stops.front().second, middle);
+				_starParticles3d->setColor(middle);
 			}
 		}
 		auto event = QResizeEvent(size(), size());
@@ -218,6 +229,9 @@ void TopBar::setPaused(bool paused) {
 	if (_star3d) {
 		_star3d->setPaused(paused);
 	}
+	if (_starParticles3d) {
+		_starParticles3d->setPaused(paused);
+	}
 }
 
 void TopBar::setTextPosition(int x, int y) {
@@ -289,28 +303,40 @@ void TopBar::paintEvent(QPaintEvent *e) {
 		TopBarAbstract::paintEdges(p);
 	}
 
-	p.setOpacity(_progress.body);
-	p.translate(_starRect.center());
-	p.scale(_progress.body, _progress.body);
-	p.translate(-_starRect.center());
-	if (_progress.top) {
-		_ministars.paint(p);
-	}
-	if (_lottie) {
-		_lottie->paint(
-			p,
-			_starRect.left()
-				+ (_starRect.width() - _lottie->width()) / 2
-				- st::lineWidth * 6,
-			_starRect.top());
-		if (!_lottie->animating() && _lottie->frameIndex() > 0) {
-			_lottie->animate(
-				[=] { update(_starRect.toRect() + Margins(st::lineWidth)); },
-				0,
-				_lottie->framesCount() - 1);
+	if (_starParticles3d) {
+		if (_progress.top) {
+			auto field = Rect(_starRect.size() * kStarParticlesFieldScale);
+			field.moveCenter(rect::center(_starRect));
+			p.setOpacity(_progress.body);
+			_starParticles3d->paint(p, field);
+			p.setOpacity(1.);
 		}
+	} else {
+		p.setOpacity(_progress.body);
+		p.translate(rect::center(_starRect));
+		p.scale(_progress.body, _progress.body);
+		p.translate(-rect::center(_starRect));
+		if (_progress.top) {
+			_ministars.paint(p);
+		}
+		if (_lottie) {
+			_lottie->paint(
+				p,
+				_starRect.left()
+					+ (_starRect.width() - _lottie->width()) / 2
+					- st::lineWidth * 6,
+				_starRect.top());
+			if (!_lottie->animating() && _lottie->frameIndex() > 0) {
+				_lottie->animate(
+					[=] {
+						update(_starRect.toRect() + Margins(st::lineWidth));
+					},
+					0,
+					_lottie->framesCount() - 1);
+			}
+		}
+		p.resetTransform();
 	}
-	p.resetTransform();
 
 
 	if (!_dollar.isNull()) {
diff --git a/Telegram/SourceFiles/ui/effects/premium_top_bar.h b/Telegram/SourceFiles/ui/effects/premium_top_bar.h
index 927563a13b..9a2ad2313a 100644
--- a/Telegram/SourceFiles/ui/effects/premium_top_bar.h
+++ b/Telegram/SourceFiles/ui/effects/premium_top_bar.h
@@ -30,6 +30,7 @@ class Icon;
 namespace Ui::Premium {
 
 class Star;
+class StarParticles;
 
 class TopBarAbstract : public RpWidget {
 public:
@@ -106,6 +107,7 @@ private:
 	QImage _dollar;
 	std::unique_ptr<Lottie::Icon> _lottie;
 	Star *_star3d = nullptr;
+	std::unique_ptr<StarParticles> _starParticles3d;
 
 	struct {
 		float64 top = 0.;