From 5ef4167c559a4df98d2346135567f6b92bb46188 Mon Sep 17 00:00:00 2001
From: NeoBrainX <NeoBrainX@googlemail.com>
Date: Sun, 21 Nov 2010 15:34:04 +0000
Subject: [PATCH] DX11: Dynamically load dxgi.dll and d3d11.dll.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6451 8ced0084-cf51-0410-be5f-012b33b47a6e
---
 .../Plugin_VideoDX11/Plugin_VideoDX11.vcproj  | 12 +--
 .../Plugins/Plugin_VideoDX11/Src/D3DBase.cpp  | 84 +++++++++++++++----
 Source/Plugins/Plugin_VideoDX11/Src/D3DBase.h |  6 ++
 Source/Plugins/Plugin_VideoDX11/Src/main.cpp  |  7 +-
 4 files changed, 86 insertions(+), 23 deletions(-)

diff --git a/Source/Plugins/Plugin_VideoDX11/Plugin_VideoDX11.vcproj b/Source/Plugins/Plugin_VideoDX11/Plugin_VideoDX11.vcproj
index 6acf8fc07c..cf2a4d49e4 100644
--- a/Source/Plugins/Plugin_VideoDX11/Plugin_VideoDX11.vcproj
+++ b/Source/Plugins/Plugin_VideoDX11/Plugin_VideoDX11.vcproj
@@ -91,7 +91,7 @@
 			<Tool
 				Name="VCLinkerTool"
 				AdditionalOptions="&quot;..\..\core\common\win32\release\common.lib&quot;"
-				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib dxguid.lib d3d11.lib dxgi.lib winmm.lib vfw32.lib wxbase28u.lib wxmsw28u_core.lib"
+				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib dxguid.lib winmm.lib vfw32.lib wxbase28u.lib wxmsw28u_core.lib"
 				OutputFile="..\..\..\Binary\Win32\Plugins\Plugin_VideoDX11.dll"
 				LinkIncremental="1"
 				SuppressStartupBanner="true"
@@ -199,7 +199,7 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib dxguid.lib d3d11.lib dxgi.lib winmm.lib vfw32.lib wxbase28u.lib wxmsw28u_core.lib"
+				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib dxguid.lib winmm.lib vfw32.lib wxbase28u.lib wxmsw28u_core.lib"
 				OutputFile="..\..\..\Binary\x64\Plugins\Plugin_VideoDX11.dll"
 				LinkIncremental="1"
 				SuppressStartupBanner="true"
@@ -297,7 +297,7 @@
 			<Tool
 				Name="VCLinkerTool"
 				AdditionalOptions="&quot;..\..\core\common\win32\debug\common.lib&quot;"
-				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib d3d11.lib dxgi.lib Rpcrt4.lib winmm.lib vfw32.lib wxbase28ud.lib wxmsw28ud_core.lib"
+				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib Rpcrt4.lib winmm.lib vfw32.lib wxbase28ud.lib wxmsw28ud_core.lib"
 				OutputFile="..\..\..\Binary\Win32/Plugins\Plugin_VideoDX11D.dll"
 				LinkIncremental="1"
 				SuppressStartupBanner="true"
@@ -393,7 +393,7 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib d3d11.lib dxgi.lib Rpcrt4.lib winmm.lib vfw32.lib"
+				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib Rpcrt4.lib winmm.lib vfw32.lib"
 				OutputFile="..\..\..\Binary\x64\Plugins\Plugin_VideoDX11D.dll"
 				LinkIncremental="1"
 				SuppressStartupBanner="true"
@@ -499,7 +499,7 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib d3d11.lib dxgi.lib Rpcrt4.lib winmm.lib vfw32.lib"
+				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib Rpcrt4.lib winmm.lib vfw32.lib"
 				OutputFile="..\..\..\Binary\Win32\Plugins\Plugin_VideoDX11DF.dll"
 				LinkIncremental="1"
 				SuppressStartupBanner="true"
@@ -608,7 +608,7 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib d3d11.lib dxgi.lib Rpcrt4.lib winmm.lib vfw32.lib"
+				AdditionalDependencies="odbc32.lib odbccp32.lib comctl32.lib uuid.lib dxguid.lib Rpcrt4.lib winmm.lib vfw32.lib"
 				OutputFile="..\..\..\Binary\x64\Plugins\Plugin_VideoDX11DF.dll"
 				LinkIncremental="1"
 				SuppressStartupBanner="true"
diff --git a/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp b/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp
index 471b374bd9..43a5867002 100644
--- a/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp
+++ b/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.cpp
@@ -30,6 +30,13 @@ D3DX11FILTERTEXTURETYPE PD3DX11FilterTexture = NULL;
 D3DX11SAVETEXTURETOFILEATYPE PD3DX11SaveTextureToFileA = NULL;
 D3DX11SAVETEXTURETOFILEWTYPE PD3DX11SaveTextureToFileW = NULL;
 
+CREATEDXGIFACTORY PCreateDXGIFactory = NULL;
+HINSTANCE hDXGIDll = NULL;
+
+typedef HRESULT (WINAPI* D3D11CREATEDEVICEANDSWAPCHAIN)(IDXGIAdapter*, D3D_DRIVER_TYPE, HMODULE, UINT, CONST D3D_FEATURE_LEVEL*, UINT, UINT, CONST DXGI_SWAP_CHAIN_DESC*, IDXGISwapChain**, ID3D11Device**, D3D_FEATURE_LEVEL*, ID3D11DeviceContext**);
+D3D11CREATEDEVICEANDSWAPCHAIN PD3D11CreateDeviceAndSwapChain = NULL;
+HINSTANCE hD3DDll = NULL;
+
 namespace D3D
 {
 
@@ -53,16 +60,28 @@ unsigned int xres, yres;
 
 bool bFrameInProgress = false;
 
-HRESULT Create(HWND wnd)
+HRESULT GetDXGIFuncPointers()
 {
-	hWnd = wnd;
-	HRESULT hr;
+	hDXGIDll = LoadLibraryA("dxgi.dll");
+	if (!hDXGIDll)
+	{
+		MessageBoxA(NULL, "Failed to load dxgi.dll", "Critical error", MB_OK | MB_ICONERROR);
+		return E_FAIL;
+	}
+	PCreateDXGIFactory = (CREATEDXGIFACTORY)GetProcAddress(hDXGIDll, "CreateDXGIFactory");
+	if (PCreateDXGIFactory == NULL) MessageBoxA(NULL, "GetProcAddress failed for CreateDXGIFactory!", "Critical error", MB_OK | MB_ICONERROR);
 
-	RECT client;
-	GetClientRect(hWnd, &client);
-	xres = client.right - client.left;
-	yres = client.bottom - client.top;
+	return S_OK;
+}
 
+void UnloadDXGI()
+{
+	if(hDXGIDll) FreeLibrary(hDXGIDll);
+	PCreateDXGIFactory = NULL;
+}
+
+HRESULT GetD3DFuncPointers()
+{
 	// try to load D3DX11 first to check whether we have proper runtime support
 	// try to use the dll the plugin was compiled against first - don't bother about debug runtimes
 	hD3DXDll = LoadLibraryA(StringFromFormat("d3dx11_%d.dll", D3DX11_SDK_VERSION).c_str());
@@ -93,11 +112,39 @@ HRESULT Create(HWND wnd)
 	PD3DX11SaveTextureToFileW = (D3DX11SAVETEXTURETOFILEWTYPE)GetProcAddress(hD3DXDll, "D3DX11SaveTextureToFileW");
 	if (PD3DX11SaveTextureToFileW == NULL) MessageBoxA(NULL, "GetProcAddress failed for D3DX11SaveTextureToFileW!", "Critical error", MB_OK | MB_ICONERROR);
 
-	// D3DX11 is fine, initialize D3D11
+	// D3DX11 is fine, check DXGI and D3D11
+	HRESULT hr = GetDXGIFuncPointers();
+	if (FAILED(hr)) return hr;
+
+	hD3DDll = LoadLibraryA("d3d11.dll");
+	if (!hD3DDll)
+	{
+		MessageBoxA(NULL, "Failed to load d3d11.dll", "Critical error", MB_OK | MB_ICONERROR);
+		return E_FAIL;
+	}
+	PD3D11CreateDeviceAndSwapChain = (D3D11CREATEDEVICEANDSWAPCHAIN)GetProcAddress(hD3DDll, "D3D11CreateDeviceAndSwapChain");
+	if (PD3D11CreateDeviceAndSwapChain == NULL) MessageBoxA(NULL, "GetProcAddress failed for D3D11CreateDeviceAndSwapChain!", "Critical error", MB_OK | MB_ICONERROR);
+
+	return S_OK;
+}
+
+HRESULT Create(HWND wnd)
+{
+	hWnd = wnd;
+	HRESULT hr;
+
+	RECT client;
+	GetClientRect(hWnd, &client);
+	xres = client.right - client.left;
+	yres = client.bottom - client.top;
+
+	hr = GetD3DFuncPointers();
+	if (FAILED(hr)) return hr;
+
 	IDXGIFactory* factory;
 	IDXGIAdapter* adapter;
 	IDXGIOutput* output;
-	hr = CreateDXGIFactory(__uuidof(IDXGIFactory), (void**)&factory);
+	hr = PCreateDXGIFactory(__uuidof(IDXGIFactory), (void**)&factory);
 	if (FAILED(hr)) MessageBox(wnd, _T("Failed to create IDXGIFactory object"), _T("Dolphin Direct3D 11 plugin"), MB_OK | MB_ICONERROR);
 
 	hr = factory->EnumAdapters(g_ActiveConfig.iAdapter, &adapter);
@@ -145,7 +192,7 @@ HRESULT Create(HWND wnd)
 #else
 	D3D11_CREATE_DEVICE_FLAG device_flags = D3D11_CREATE_DEVICE_SINGLETHREADED;
 #endif
-	hr = D3D11CreateDeviceAndSwapChain(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL, device_flags,
+	hr = PD3D11CreateDeviceAndSwapChain(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL, device_flags,
 										supported_feature_levels, NUM_SUPPORTED_FEATURE_LEVELS,
 										D3D11_SDK_VERSION, &swap_chain_desc, &swapchain, &device,
 										&featlevel, &context);
@@ -192,12 +239,6 @@ HRESULT Create(HWND wnd)
 
 void Close()
 {
-	// unload D3DX11
-	FreeLibrary(hD3DXDll);
-	PD3DX11FilterTexture = NULL;
-	PD3DX11SaveTextureToFileA = NULL;
-	PD3DX11SaveTextureToFileW = NULL;
-
 	// release all bound resources
 	context->ClearState();
 	SAFE_RELEASE(backbuf);
@@ -217,6 +258,17 @@ void Close()
 		NOTICE_LOG(VIDEO, "Successfully released all device references!");
 	}
 	device = NULL;
+
+	// unload DLLs
+	if(hD3DXDll) FreeLibrary(hD3DXDll);
+	PD3DX11FilterTexture = NULL;
+	PD3DX11SaveTextureToFileA = NULL;
+	PD3DX11SaveTextureToFileW = NULL;
+
+	if(hD3DXDll) FreeLibrary(hD3DXDll);
+	PD3D11CreateDeviceAndSwapChain = NULL;
+
+	UnloadDXGI();
 }
 
 /* just returning the 4_0 ones here */
diff --git a/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.h b/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.h
index c1a70c803f..94e5fa4648 100644
--- a/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.h
+++ b/Source/Plugins/Plugin_VideoDX11/Src/D3DBase.h
@@ -31,6 +31,9 @@ class D3DTexture2D;
 namespace D3D
 {
 
+HRESULT GetDXGIFuncPointers();
+void UnloadDXGI();
+
 HRESULT Create(HWND wnd);
 void Close();
 
@@ -86,3 +89,6 @@ extern D3DX11SAVETEXTURETOFILEWTYPE PD3DX11SaveTextureToFileW;
 #else
 #define PD3DX11SaveTextureToFile PD3DX11SaveTextureToFileA
 #endif
+
+typedef HRESULT (WINAPI* CREATEDXGIFACTORY)(REFIID, void**);
+extern CREATEDXGIFACTORY PCreateDXGIFactory;
diff --git a/Source/Plugins/Plugin_VideoDX11/Src/main.cpp b/Source/Plugins/Plugin_VideoDX11/Src/main.cpp
index 5066a79ac3..e6b64d885d 100644
--- a/Source/Plugins/Plugin_VideoDX11/Src/main.cpp
+++ b/Source/Plugins/Plugin_VideoDX11/Src/main.cpp
@@ -152,9 +152,12 @@ void DllConfig(void *_hParent)
 {
 	g_Config.Load((std::string(File::GetUserPath(D_CONFIG_IDX)) + "gfx_dx11.ini").c_str());
 
+	HRESULT hr = D3D::GetDXGIFuncPointers();
+	if (FAILED(hr)) return;
+
 	IDXGIFactory* factory;
 	IDXGIAdapter* ad;
-	const HRESULT hr = CreateDXGIFactory(__uuidof(IDXGIFactory), (void**)&factory);
+	hr = PCreateDXGIFactory(__uuidof(IDXGIFactory), (void**)&factory);
 	if (FAILED(hr))
 		PanicAlert("Failed to create IDXGIFactory object");
 
@@ -185,6 +188,8 @@ void DllConfig(void *_hParent)
 	g_Config.Save((std::string(File::GetUserPath(D_CONFIG_IDX)) + "gfx_dx11.ini").c_str());
 
 	factory->Release();
+
+	D3D::UnloadDXGI();
 }
 
 void Initialize(void *init)