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Telegram/lib_lottie/lottie/details/lottie_frame_provider_shared.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "lottie/details/lottie_frame_provider.h"
+#include "base/weak_ptr.h"
+
+#include <QtCore/QReadWriteLock>
+
+namespace Lottie {
+
+class FrameProviderShared final
+	: public FrameProvider
+	, public base::has_weak_ptr {
+public:
+	explicit FrameProviderShared(
+		FnMut<void(FnMut<void(std::unique_ptr<FrameProvider>)>)> factory);
+
+	QImage construct(
+		std::unique_ptr<FrameProviderToken> &token,
+		const FrameRequest &request) override;
+	const Information &information() override;
+	bool valid() override;
+
+	int sizeRounding() override;
+
+	std::unique_ptr<FrameProviderToken> createToken() override;
+
+	bool render(
+		const std::unique_ptr<FrameProviderToken> &token,
+		QImage &to,
+		const FrameRequest &request,
+		int index) override;
+
+private:
+	std::unique_ptr<FrameProvider> _shared;
+	QReadWriteLock _mutex;
+	bool _constructed = false;
+
+};
+
+} // namespace Lottie