libobs-d3d11: Store dxgi adapter used for device

Keeping a reference is useful, and additionally allows pruning a bit of
duplicated code in the dupicator object.

libobs-d3d11/d3d11-duplicator.cpp

@@ -20,20 +20,9 @@
 static inline bool get_monitor(gs_device_t *device, int monitor_idx,
 		IDXGIOutput **dxgiOutput)
 {
-	ComPtr<IDXGIAdapter> dxgiAdapter;
-	ComPtr<IDXGIDevice> dxgiDevice;
 	HRESULT hr;
 
-	hr = device->device->QueryInterface(__uuidof(IDXGIDevice),
-			(void**)dxgiDevice.Assign());
-	if (FAILED(hr))
-		throw HRError("Failed to query IDXGIDevice", hr);
-
-	hr = dxgiDevice->GetAdapter(dxgiAdapter.Assign());
-	if (FAILED(hr))
-		throw HRError("Failed to get adapter", hr);
-
-	hr = dxgiAdapter->EnumOutputs(monitor_idx, dxgiOutput);
+	hr = device->adapter->EnumOutputs(monitor_idx, dxgiOutput);
 	if (FAILED(hr)) {
 		if (hr == DXGI_ERROR_NOT_FOUND)
 			return false;

libobs-d3d11/d3d11-subsystem.cpp

@@ -171,7 +171,7 @@ void gs_device::InitCompiler()
 	throw "Could not find any D3DCompiler libraries";
 }
 
-void gs_device::InitFactory(uint32_t adapterIdx, IDXGIAdapter1 **padapter)
+void gs_device::InitFactory(uint32_t adapterIdx)
 {
 	HRESULT hr;
 	IID factoryIID = (GetWinVer() >= 0x602) ? dxgiFactory2 :
@@ -181,7 +181,7 @@ void gs_device::InitFactory(uint32_t adapterIdx, IDXGIAdapter1 **padapter)
 	if (FAILED(hr))
 		throw UnsupportedHWError("Failed to create DXGIFactory", hr);
 
-	hr = factory->EnumAdapters1(adapterIdx, padapter);
+	hr = factory->EnumAdapters1(adapterIdx, &adapter);
 	if (FAILED(hr))
 		throw UnsupportedHWError("Failed to enumerate DXGIAdapter", hr);
 }
@@ -194,7 +194,7 @@ const static D3D_FEATURE_LEVEL featureLevels[] =
 	D3D_FEATURE_LEVEL_9_3,
 };
 
-void gs_device::InitDevice(uint32_t adapterIdx, IDXGIAdapter *adapter)
+void gs_device::InitDevice(uint32_t adapterIdx)
 {
 	wstring adapterName;
 	DXGI_ADAPTER_DESC desc;
@@ -423,8 +423,6 @@ void gs_device::UpdateViewProjMatrix()
 gs_device::gs_device(uint32_t adapterIdx)
 	: curToplogy           (D3D11_PRIMITIVE_TOPOLOGY_UNDEFINED)
 {
-	ComPtr<IDXGIAdapter1> adapter;
-
 	matrix4_identity(&curProjMatrix);
 	matrix4_identity(&curViewMatrix);
 	matrix4_identity(&curViewProjMatrix);
@@ -437,8 +435,8 @@ gs_device::gs_device(uint32_t adapterIdx)
 	}
 
 	InitCompiler();
-	InitFactory(adapterIdx, adapter.Assign());
-	InitDevice(adapterIdx, adapter);
+	InitFactory(adapterIdx);
+	InitDevice(adapterIdx);
 	device_set_render_target(this, NULL, NULL);
 }
 

libobs-d3d11/d3d11-subsystem.hpp

@@ -613,6 +613,7 @@ struct mat4float {
 
 struct gs_device {
 	ComPtr<IDXGIFactory1>       factory;
+	ComPtr<IDXGIAdapter1>       adapter;
 	ComPtr<ID3D11Device>        device;
 	ComPtr<ID3D11DeviceContext> context;
 
@@ -652,8 +653,8 @@ struct gs_device {
 	matrix4                     curViewProjMatrix;
 
 	void InitCompiler();
-	void InitFactory(uint32_t adapterIdx, IDXGIAdapter1 **adapter);
-	void InitDevice(uint32_t adapterIdx, IDXGIAdapter *adapter);
+	void InitFactory(uint32_t adapterIdx);
+	void InitDevice(uint32_t adapterIdx);
 
 	ID3D11DepthStencilState *AddZStencilState();
 	ID3D11RasterizerState   *AddRasterState();