Reduce host swap chain latency

new_editor/app/Host/D3D12WindowSwapChainPresenter.cpp

@@ -63,6 +63,8 @@ bool D3D12WindowSwapChainPresenter::CreateSwapChain(int width, int height) {
         return false;
     }
 
+    ConfigureFrameLatency();
+
     if (!RecreateBackBufferViews()) {
         m_lastError = "Failed to create swap chain back buffer views.";
         return false;
@@ -73,6 +75,21 @@ bool D3D12WindowSwapChainPresenter::CreateSwapChain(int width, int height) {
     return true;
 }
 
+void D3D12WindowSwapChainPresenter::ConfigureFrameLatency() {
+    D3D12SwapChain* d3d12SwapChain = GetD3D12SwapChain();
+    if (d3d12SwapChain == nullptr) {
+        return;
+    }
+
+    auto* nativeSwapChain =
+        static_cast<IDXGISwapChain3*>(d3d12SwapChain->GetNativeHandle());
+    if (nativeSwapChain == nullptr) {
+        return;
+    }
+
+    nativeSwapChain->SetMaximumFrameLatency(1u);
+}
+
 void D3D12WindowSwapChainPresenter::DestroySwapChain() {
     ReleaseBackBufferViews();
 

new_editor/app/Host/D3D12WindowSwapChainPresenter.h

@@ -23,7 +23,7 @@ namespace XCEngine::UI::Editor::Host {
 
 class D3D12WindowSwapChainPresenter {
 public:
-    static constexpr std::uint32_t kSwapChainBufferCount = 3u;
+    static constexpr std::uint32_t kSwapChainBufferCount = 2u;
 
     bool Initialize(D3D12HostDevice& hostDevice, HWND hwnd, int width, int height);
     void Shutdown();
@@ -41,6 +41,7 @@ public:
 
 private:
     bool CreateSwapChain(int width, int height);
+    void ConfigureFrameLatency();
     void DestroySwapChain();
     bool RecreateSwapChain(int width, int height);
     ::XCEngine::RHI::D3D12SwapChain* GetD3D12SwapChain() const;