create device

src/defender-control/gui_dx11.cpp

@@ -2,11 +2,51 @@
 
 namespace gui::dx11
 {
+  static ID3D11Device* g_device = NULL;
+  static ID3D11DeviceContext* g_context = NULL;
+  static IDXGISwapChain* g_swapchain = NULL;
+  static ID3D11RenderTargetView* g_render_target = NULL;
+
   bool create_device(HWND hwnd)
   {
-    // Setup a swapchain
+    // create swapchain
+    DXGI_SWAP_CHAIN_DESC sd;
+    ZeroMemory(&sd, sizeof(sd));
+    sd.BufferCount = 2;
+    sd.BufferDesc.Width = 0;
+    sd.BufferDesc.Height = 0;
+    sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+    sd.BufferDesc.RefreshRate.Numerator = 60;
+    sd.BufferDesc.RefreshRate.Denominator = 1;
+    sd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
+    sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    sd.OutputWindow = hwnd;
+    sd.SampleDesc.Count = 1;
+    sd.SampleDesc.Quality = 0;
+    sd.Windowed = TRUE;
+    sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+
+    D3D_FEATURE_LEVEL featureLevel;
+    const D3D_FEATURE_LEVEL featureLevelArray[2] = {
+      D3D_FEATURE_LEVEL_11_0, D3D_FEATURE_LEVEL_10_0, 
+    };
+
+    if (D3D11CreateDeviceAndSwapChain(
+      NULL, D3D_DRIVER_TYPE_HARDWARE, NULL,0, featureLevelArray,
+      2, D3D11_SDK_VERSION, &sd, &g_swapchain, &g_device, &featureLevel, &g_context) != S_OK)
+      return false;
+
+    // create render target
+    ID3D11Texture2D* pBackBuffer = nullptr;
+    g_swapchain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+
+    if (!pBackBuffer)
+      return false;
+
+    g_device->CreateRenderTargetView(pBackBuffer, NULL, &g_render_target);
+    pBackBuffer->Release();
 
-    return false;
+    return true;
   }
 
   void cleanup()