Examples: DirectX10, DirectX11: try WARP software driver if hardware driver is not available. (#5924, #5562)

docs/CHANGELOG.txt

@@ -75,6 +75,7 @@ Other changes:
 - Misc: fixed parameters to IMGUI_DEBUG_LOG() not being dead-stripped when building
   with IMGUI_DISABLE_DEBUG_TOOLS is used. (#5901) [@Teselka]
 - Misc: fixed compile-time detection of SSE features on MSVC 32-bits builds. (#5943) [@TheMostDiligent]
+- Examples: DirectX10, DirectX11: try WARP software driver if hardware driver is not available. (#5924, #5562)
 - Backends: Allegro5: restoring using al_draw_indexed_prim() when Allegro version is >= 5.2.5. (#5937) [@Espyo]
 - Backends: Vulkan: Fixed sampler passed to ImGui_ImplVulkan_AddTexture() not being honored as we were using
   an immutable sampler. (#5502, #6001, #914) [@martin-ejdestig, @rytisss]

examples/example_win32_directx10/main.cpp

@@ -182,7 +182,10 @@ bool CreateDeviceD3D(HWND hWnd)
 
     UINT createDeviceFlags = 0;
     //createDeviceFlags |= D3D10_CREATE_DEVICE_DEBUG;
-    if (D3D10CreateDeviceAndSwapChain(NULL, D3D10_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, D3D10_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice) != S_OK)
+    HRESULT res = D3D10CreateDeviceAndSwapChain(NULL, D3D10_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, D3D10_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice);
+    if (res == DXGI_ERROR_UNSUPPORTED) // Try high-performance WARP software driver if hardware is not available.
+        res = D3D10CreateDeviceAndSwapChain(NULL, D3D10_DRIVER_TYPE_WARP, NULL, createDeviceFlags, D3D10_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice);
+    if (res != S_OK)
         return false;
 
     CreateRenderTarget();

examples/example_win32_directx11/main.cpp

@@ -185,7 +185,10 @@ bool CreateDeviceD3D(HWND hWnd)
     //createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
     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, createDeviceFlags, featureLevelArray, 2, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext) != S_OK)
+    HRESULT res = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, featureLevelArray, 2, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext);
+    if (res == DXGI_ERROR_UNSUPPORTED) // Try high-performance WARP software driver if hardware is not available.
+        res = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_WARP, NULL, createDeviceFlags, featureLevelArray, 2, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext);
+    if (res != S_OK)
         return false;
 
     CreateRenderTarget();