#include "pch.h" #include "latencyflex.h" #include "hookutils.h" #include "convar.h" typedef void (*OnRenderStartType)(); OnRenderStartType OnRenderStart; ConVar* Cvar_r_latencyflex; HMODULE m_lfxModule {}; typedef void (*PFN_lfx_WaitAndBeginFrame)(); PFN_lfx_WaitAndBeginFrame m_lfx_WaitAndBeginFrame {}; void OnRenderStartHook() { // Sleep before next frame as needed to reduce latency. if (Cvar_r_latencyflex->GetInt()) { if (m_lfx_WaitAndBeginFrame) { m_lfx_WaitAndBeginFrame(); } } OnRenderStart(); } void InitialiseLatencyFleX(HMODULE baseAddress) { // Connect to the LatencyFleX service // LatencyFleX is an open source vendor agnostic replacement for Nvidia Reflex input latency reduction technology. // https://ishitatsuyuki.github.io/post/latencyflex/ const auto lfxModuleName = "latencyflex_layer.dll"; const auto lfxModuleNameFallback = "latencyflex_wine.dll"; auto useFallbackEntrypoints = false; // Load LatencyFleX library. m_lfxModule = ::LoadLibraryA(lfxModuleName); if (m_lfxModule == nullptr && ::GetLastError() == ERROR_MOD_NOT_FOUND) { spdlog::info("LFX: Primary LatencyFleX library not found, trying fallback."); m_lfxModule = ::LoadLibraryA(lfxModuleNameFallback); if (m_lfxModule == nullptr) { if (::GetLastError() == ERROR_MOD_NOT_FOUND) { spdlog::info("LFX: Fallback LatencyFleX library not found."); } else { spdlog::info("LFX: Error loading fallback LatencyFleX library - Code: {}", ::GetLastError()); } return; } useFallbackEntrypoints = true; } else if (m_lfxModule == nullptr) { spdlog::info("LFX: Error loading primary LatencyFleX library - Code: {}", ::GetLastError()); return; } m_lfx_WaitAndBeginFrame = reinterpret_cast<PFN_lfx_WaitAndBeginFrame>(reinterpret_cast<void*>( GetProcAddress(m_lfxModule, !useFallbackEntrypoints ? "lfx_WaitAndBeginFrame" : "winelfx_WaitAndBeginFrame"))); spdlog::info("LFX: Initialized."); Cvar_r_latencyflex = new ConVar("r_latencyflex", "1", FCVAR_ARCHIVE, "Whether or not to use LatencyFleX input latency reduction."); HookEnabler hook; ENABLER_CREATEHOOK(hook, (char*)baseAddress + 0x1952C0, &OnRenderStartHook, reinterpret_cast<LPVOID*>(&OnRenderStart)); }