StereoLayerAdditionalFlagsManager.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Map.h"
#include "Containers/Set.h"
#include "Logging/LogMacros.h"
#include "Templates/SharedPointer.h"
 
DECLARE_LOG_CATEGORY_EXTERN(LogStereoLayerFlags, Log, All);
 
class FStereoLayerAdditionalFlagsManager final
{
    // Required for creating a TSharedPtr because this class has a private constructor.
    template<typename, ESPMode>
    friend class SharedPointerInternals::TIntrusiveReferenceController;
 
public:
    static TSharedPtr<FStereoLayerAdditionalFlagsManager> Get();
 
    static void CollectFlags(TSet<FName>& OutFlags);
 
    static void Destroy();
 
    uint32 GetFlagValue(const FName Flag) const;
 
private:
    FStereoLayerAdditionalFlagsManager() {};
 
    void CreateRuntimeFlagsMap();
 
    void CollectFlags();
 
    static TSharedPtr<FStereoLayerAdditionalFlagsManager> Instance;
 
    // All the unique flags provided by suppliers.
    TSet<FName> UniqueFlags;
    // Maps flags with their runtime values.
    TMap<FName, uint32> RuntimeFlags;
};