RenderTimer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "HAL/PlatformTime.h"
 
class FRenderTimer
{
public:
    FRenderTimer()
        : CurrentDeltaTime(0.0f)
        , CurrentTime(0.0f)
    {
    }
 
    float GetCurrentTime() const
    {
        return CurrentTime;
    }
 
    float GetCurrentDeltaTime() const
    {
        return CurrentDeltaTime;
    }
 
    void Tick(float DeltaTime)
    {
        CurrentDeltaTime = DeltaTime;
        CurrentTime += DeltaTime;
    }
 
protected:
    float CurrentDeltaTime;
    float CurrentTime;
};
 
extern RENDERCORE_API bool GPauseRenderingRealtimeClock;
 
extern RENDERCORE_API FRenderTimer GRenderingRealtimeClock;
 
struct FInputLatencyTimer
{
    FInputLatencyTimer(float InUpdateFrequency)
        : UpdateFrequency(InUpdateFrequency)
    {
    }
 
    RENDERCORE_API void GameThreadTick();
 
    inline float GetDeltaSeconds() const
    {
        return FPlatformTime::ToSeconds(DeltaTime);
    }
 
    bool    bInitialized = false;
 
    bool    GameThreadTrigger = false;
 
    bool    RenderThreadTrigger = false;
 
    uint32  StartTime = 0;
 
    uint32  DeltaTime = 0;
 
    double  LastCaptureTime = 0.0f;
 
    float   UpdateFrequency;
};
 
extern RENDERCORE_API FInputLatencyTimer GInputLatencyTimer;
 
extern RENDERCORE_API uint32 GRenderThreadTime;
 
extern RENDERCORE_API uint32 GRenderThreadWaitTime;
 
extern RENDERCORE_API uint32 GRHIThreadTime;
 
extern RENDERCORE_API uint32 GGameThreadTime;
 
extern RENDERCORE_API uint32 GGameThreadWaitTime;
 
extern RENDERCORE_API uint32 GSwapBufferTime;
 
extern RENDERCORE_API uint32 GGameThreadTimeCriticalPath;
 
extern RENDERCORE_API uint32 GRenderThreadTimeCriticalPath;