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4927654da0
CEngine::Frame() tends to return out early if we are ahead of frame time, and therefore need to sleep. In this particular engine, CEngine::Frame() returns true if it had actually executed an engine frame, else it returns false. Therefore, we end up calling 'NvAPI_D3D_Sleep()' multiple times a frame, and thus causing a major loss in performance. Now we check if we have actually ran a frame (incrementing reflex frame if so). If the frame was not incremented, but 'GFX_RunLowLatencyFrame()' was called, it will not call 'NvAPI_D3D_Sleep()'. Code has been tested and appears to work on my system (never called twice or more per frame). Needs more testing on other systems to make sure its good.
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
//===== Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ======//
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//
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// Purpose:
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//
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// $Workfile: $
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// $Date: $
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// $NoKeywords: $
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//===========================================================================//
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#if !defined( IENGINE_H )
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#define IENGINE_H
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#ifdef _WIN32
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#pragma once
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#endif
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//#include "tier1/interface.h"
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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abstract_class IEngine
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{
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public:
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enum QuitState_t
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{
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QUIT_NOTQUITTING = 0,
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QUIT_TODESKTOP,
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QUIT_RESTART
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};
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// Engine State Flags
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enum EngineState_t
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{
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DLL_INACTIVE = 0, // no dll
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DLL_ACTIVE, // engine is focused
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DLL_CLOSE, // closing down dll
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DLL_RESTART, // engine is shutting down but will restart right away
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DLL_PAUSED, // engine is paused, can become active from this state
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};
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virtual ~IEngine(void) { }
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virtual bool Load(bool dedicated, const char* rootdir) = 0;
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virtual void Unload(void) = 0;
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virtual void SetNextState(EngineState_t iNextState) = 0;
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virtual EngineState_t GetState(void) = 0;
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virtual bool Frame(void) = 0; // Returns true if an engine frame is being ran.
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virtual float GetFrameTime(void) = 0;
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virtual float GetPreviousTime(void) = 0;
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virtual __m128 GetCurTime(void) = 0;
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virtual void SetQuitting(int quittype) = 0;
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virtual int GetPlaylistCount(void) = 0;
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virtual const char* sub_1401FE2B0(int a2) = 0; // Playlists KeyValues stuff.
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virtual bool sub_1401FE3B0(__int64 a2) = 0; // Playlists KeyValues stuff.
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};
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#endif // IENGINE_H
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