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Telegram/SourceFiles/ui/effects/premium_stars.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "ui/effects/animations.h"
+
+#include <QSvgRenderer>
+
+namespace Ui {
+namespace Premium {
+
+enum class MiniStarsType {
+	MonoStars,
+	BiStars,
+	SlowStars,
+	DiamondStars,
+	SlowDiamondStars,
+};
+
+class MiniStars final {
+public:
+	MiniStars(
+		Fn<void(const QRect &r)> updateCallback,
+		bool opaque = false,
+		MiniStarsType type = MiniStarsType::MonoStars);
+
+	void paint(QPainter &p, const QRectF &rect);
+	void setPaused(bool paused);
+
+	static constexpr auto kSizeFactor = 1.5;
+
+private:
+	struct MiniStar {
+		crl::time birthTime = 0;
+		crl::time deathTime = 0;
+		int angle = 0;
+		float64 size = 0.;
+		float64 alpha = 0.;
+		float64 sinFactor = 0.;
+		not_null<QSvgRenderer*> sprite;
+	};
+
+	struct Interval {
+		int from = 0;
+		int length = 0;
+	};
+
+	void createStar(crl::time now);
+	[[nodiscard]] crl::time timeNow() const;
+	[[nodiscard]] int randomInterval(
+		const Interval &interval,
+		const gsl::byte &random) const;
+
+	const std::vector<Interval> _availableAngles;
+	const Interval _lifeLength;
+	const Interval _deathTime;
+	const Interval _size;
+	const Interval _alpha;
+	const Interval _sinFactor;
+	const Interval _spritesCount;
+
+	const float64 _appearProgressTill;
+	const float64 _disappearProgressAfter;
+	const float64 _distanceProgressStart;
+
+	QSvgRenderer _sprite;
+	std::unique_ptr<QSvgRenderer> _secondSprite;
+
+	Ui::Animations::Basic _animation;
+
+	std::vector<MiniStar> _ministars;
+
+	crl::time _nextBirthTime = 0;
+	bool _paused = false;
+	uint8_t _idleCounter : 3 = 0;
+
+	QRect _rectToUpdate;
+
+};
+
+} // namespace Premium
+} // namespace Ui