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Allow disabling v-sync in D3D11/D3D12 backend #635

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Allow disabling v-sync in D3D11/D3D12 backend #635

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2 changes: 1 addition & 1 deletion Graphics/GraphicsEngineD3D11/src/SwapChainD3D11Impl.cpp
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Expand Up @@ -152,7 +152,7 @@ void SwapChainD3D11Impl::Present(Uint32 SyncInterval)
// https://docs.microsoft.com/en-us/windows/uwp/gaming/reduce-latency-with-dxgi-1-3-swap-chains#step-4-wait-before-rendering-each-frame
WaitForFrame();

m_pSwapChain->Present(SyncInterval, 0);
m_pSwapChain->Present(SyncInterval, SyncInterval == 0 ? DXGI_PRESENT_ALLOW_TEARING : 0);
}

void SwapChainD3D11Impl::UpdateSwapChain(bool CreateNew)
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2 changes: 1 addition & 1 deletion Graphics/GraphicsEngineD3D12/src/SwapChainD3D12Impl.cpp
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Expand Up @@ -154,7 +154,7 @@ void SwapChainD3D12Impl::Present(Uint32 SyncInterval)
// https://docs.microsoft.com/en-us/windows/uwp/gaming/reduce-latency-with-dxgi-1-3-swap-chains#step-4-wait-before-rendering-each-frame
WaitForFrame();

auto hr = m_pSwapChain->Present(SyncInterval, 0);
auto hr = m_pSwapChain->Present(SyncInterval, SyncInterval == 0 ? DXGI_PRESENT_ALLOW_TEARING : 0);
VERIFY(SUCCEEDED(hr), "Present failed");

if (m_SwapChainDesc.IsPrimary)
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2 changes: 2 additions & 0 deletions Graphics/GraphicsEngineD3DBase/include/SwapChainD3DBase.hpp
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Expand Up @@ -190,6 +190,8 @@ class SwapChainD3DBase : public SwapChainBase<BaseInterface>
// mode (or monitor resolution) will be changed to match the dimensions of the application window.
swapChainDesc.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;

// https://learn.microsoft.com/en-us/windows/win32/direct3ddxgi/variable-refresh-rate-displays#variable-refresh-rate-displaysvsync-off
swapChainDesc.Flags |= DXGI_SWAP_CHAIN_FLAG_ALLOW_TEARING;

CComPtr<IDXGIFactory2> pDXGIFactory;

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