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Telegram/SourceFiles/ui/effects/ministar_particles.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/rp_widget.h"
+
+namespace Ui {
+
+class StarParticles final {
+public:
+	enum class Type {
+		Right,
+		Radial,
+		RadialInside,
+	};
+
+	StarParticles(Type type, int count, int size);
+
+	void setSpeed(float speed);
+	void setVisible(float visible);
+	void setColor(const QColor &color);
+	void paint(QPainter &p, const QRect &rect, crl::time now);
+
+private:
+	struct Particle {
+		float x = 0.;
+		float y = 0.;
+		float vx = 0.;
+		float vy = 0.;
+		float rotation = 0.;
+		float vrotation = 0.;
+		float size = 0.;
+		float alpha = 0.;
+		crl::time born = 0;
+	};
+
+	void generate();
+	[[nodiscard]] QImage generateStarCache(int size, QColor color);
+
+	Type _type;
+	int _count = 0;
+	int _starSize = 0;
+	float _speed = 1.f;
+	float _visible = 1.f;
+	QColor _color = QColor(255, 200, 70);
+	std::vector<Particle> _particles;
+	base::flat_map<QRgb, QImage> _starCache;
+	crl::time _lastTime = 0;
+};
+
+} // namespace Ui