D3DBase: Create the swapchain in fullscreen mode if enabled.

Source/Core/VideoBackends/D3D/D3DBase.cpp

@@ -8,6 +8,7 @@
 #include "Common/Logging/Log.h"
 #include "Common/MsgHandler.h"
 #include "Common/StringUtil.h"
+#include "Core/ConfigManager.h"
 #include "VideoBackends/D3D/D3DBase.h"
 #include "VideoBackends/D3D/D3DState.h"
 #include "VideoBackends/D3D/D3DTexture.h"
@@ -315,7 +316,8 @@ HRESULT Create(HWND wnd)
   swap_chain_desc.OutputWindow = wnd;
   swap_chain_desc.SampleDesc.Count = 1;
   swap_chain_desc.SampleDesc.Quality = 0;
-  swap_chain_desc.Windowed = TRUE;
+  swap_chain_desc.Windowed =
+      !SConfig::GetInstance().bFullscreen || g_ActiveConfig.bBorderlessFullscreen;
 
   DXGI_OUTPUT_DESC out_desc = {};
   output->GetDesc(&out_desc);
@@ -610,17 +612,11 @@ HRESULT SetFullscreenState(bool enable_fullscreen)
   return swapchain->SetFullscreenState(enable_fullscreen, nullptr);
 }
 
-HRESULT GetFullscreenState(bool* fullscreen_state)
+bool GetFullscreenState()
 {
-  if (fullscreen_state == nullptr)
-  {
-    return E_POINTER;
-  }
-
-  BOOL state;
-  HRESULT hr = swapchain->GetFullscreenState(&state, nullptr);
-  *fullscreen_state = !!state;
-  return hr;
+  BOOL state = FALSE;
+  swapchain->GetFullscreenState(&state, nullptr);
+  return !!state;
 }
 
 }  // namespace D3D

Source/Core/VideoBackends/D3D/D3DBase.h

@@ -75,7 +75,7 @@ bool BGRATexturesSupported();
 unsigned int GetMaxTextureSize();
 
 HRESULT SetFullscreenState(bool enable_fullscreen);
-HRESULT GetFullscreenState(bool* fullscreen_state);
+bool GetFullscreenState();
 
 // This function will assign a name to the given resource.
 // The DirectX debug layer will make it easier to identify resources that way,

Source/Core/VideoBackends/D3D/Render.cpp

@@ -254,6 +254,7 @@ Renderer::Renderer(void*& window_handle)
   s_last_efb_scale = g_ActiveConfig.iEFBScale;
   s_last_stereo_mode = g_ActiveConfig.iStereoMode > 0;
   s_last_xfb_mode = g_ActiveConfig.bUseRealXFB;
+  s_last_exclusive_mode = D3D::GetFullscreenState();
   CalculateTargetSize(s_backbuffer_width, s_backbuffer_height);
   PixelShaderManager::SetEfbScaleChanged();
 
@@ -875,8 +876,7 @@ void Renderer::SwapImpl(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight,
   {
     std::lock_guard<std::mutex> lk(s_critical_fullscreen);
 
-    bool exclusive_mode = false;
-    D3D::GetFullscreenState(&exclusive_mode);
+    const bool exclusive_mode = D3D::GetFullscreenState();
     if (s_last_exclusive_mode && !exclusive_mode && Host_RendererHasFocus())
       D3D::SetFullscreenState(true);
   }

Source/Core/VideoBackends/D3D12/D3DBase.cpp

@@ -871,12 +871,11 @@ HRESULT SetFullscreenState(bool enable_fullscreen)
   return S_OK;
 }
 
-HRESULT GetFullscreenState(bool* fullscreen_state)
+bool GetFullscreenState()
 {
   // Fullscreen exclusive intentionally not supported in DX12 backend. No performance
   // difference between it and windowed full-screen due to usage of a FLIP swap chain.
-  *fullscreen_state = false;
-  return S_OK;
+  return false;
 }
 
 }  // namespace D3D

Source/Core/VideoBackends/D3D12/D3DBase.h

@@ -124,7 +124,7 @@ const std::string VertexShaderVersionString();
 unsigned int GetMaxTextureSize();
 
 HRESULT SetFullscreenState(bool enable_fullscreen);
-HRESULT GetFullscreenState(bool* fullscreen_state);
+bool GetFullscreenState();
 
 // This function will assign a name to the given resource.
 // The DirectX debug layer will make it easier to identify resources that way,