├── README.md
├── d3d11.cpp
├── d3d11.def
└── d3d11.vcxproj


/README.md:
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 1 | # Elf auf Zwölf
 2 | 
 3 | Translates D3D11 games to D3D12 using Microsoft's own
 4 | [D3D11On12](https://docs.microsoft.com/en-us/windows/desktop/direct3d12/direct3d-11-on-12)
 5 | wrapper library.
 6 | 
 7 | ### Requirements
 8 | 
 9 | Windows 10 build 1809 is required for this to work properly. Might work with 1803, but that
10 | was not tested.
11 | 
12 | ### How to use
13 | 
14 | Just download the latest [release](https://github.com/doitsujin/elf-auf-zwoelf/releases),
15 | copy the `d3d11.dll` next to the executable of the game you want to run, and start the game.
16 | Make sure to use the `x64` one for 64-bit games, and the `x86` one for 32-bit games.
17 | 
18 | If everything works correctly, you will most likely experience reduced performance compared
19 | to native D3D11, and in some cases rendering issues and/or driver crashes. Some games may
20 | refuse to run entirely.
21 | 
22 | **Note:** Tools like MSI Afterburner will still show D3D11 in their overlay. This is because
23 | they see a DXGI swap chain created for a D3D11 device, not the underlying D3D12 device.
24 | 
25 | ### Why?
26 | 
27 | Why not? Just don't expect any sort of support when running into issues.
28 | 


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/d3d11.cpp:
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  1 | #include <d3d11.h>
  2 | #include <d3d11on12.h>
  3 | #include <d3d12.h>
  4 | 
  5 | #include <iostream>
  6 | 
  7 | static PFN_D3D11ON12_CREATE_DEVICE getPfnD3D11On12CreateDevice() {
  8 | 	static PFN_D3D11ON12_CREATE_DEVICE fptr = nullptr;
  9 | 
 10 | 	if (fptr)
 11 | 		return fptr;
 12 | 
 13 | 	HMODULE d3d11module = LoadLibraryA("C:\\Windows\\System32\\d3d11.dll");
 14 | 
 15 | 	if (!d3d11module)
 16 | 		return nullptr;
 17 | 
 18 | 	fptr = reinterpret_cast<PFN_D3D11ON12_CREATE_DEVICE>(
 19 | 		GetProcAddress(d3d11module, "D3D11On12CreateDevice"));
 20 | 	return fptr;
 21 | }
 22 | 
 23 | 
 24 | 
 25 | HRESULT __stdcall D3D11CreateDevice(
 26 | 	IDXGIAdapter            *pAdapter,
 27 | 	D3D_DRIVER_TYPE         DriverType,
 28 | 	HMODULE                 Software,
 29 | 	UINT                    Flags,
 30 | 	const D3D_FEATURE_LEVEL *pFeatureLevels,
 31 | 	UINT                    FeatureLevels,
 32 | 	UINT                    SDKVersion,
 33 | 	ID3D11Device            **ppDevice,
 34 | 	D3D_FEATURE_LEVEL       *pFeatureLevel,
 35 | 	ID3D11DeviceContext     **ppImmediateContext) {
 36 | 	ID3D12Device* d3d12device;
 37 | 
 38 | 	HRESULT hr = D3D12CreateDevice(pAdapter,
 39 | 		D3D_FEATURE_LEVEL_11_0,
 40 | 		IID_PPV_ARGS(&d3d12device));
 41 | 	
 42 | 	if (FAILED(hr))
 43 | 		return hr;
 44 | 
 45 | 	D3D12_COMMAND_QUEUE_DESC desc;
 46 | 	desc.Type		= D3D12_COMMAND_LIST_TYPE_DIRECT;
 47 | 	desc.Priority	= D3D12_COMMAND_QUEUE_PRIORITY_NORMAL;
 48 | 	desc.Flags		= D3D12_COMMAND_QUEUE_FLAG_NONE;
 49 | 	desc.NodeMask	= 0;
 50 | 
 51 | 	ID3D12CommandQueue* d3d12queue;
 52 | 
 53 | 	hr = d3d12device->CreateCommandQueue(&desc,
 54 | 		IID_PPV_ARGS(&d3d12queue));
 55 | 
 56 | 	if (FAILED(hr))
 57 | 		return hr;
 58 | 
 59 | 	auto pfnD3D11on12CreateDevice = getPfnD3D11On12CreateDevice();
 60 | 
 61 | 	if (!pfnD3D11on12CreateDevice)
 62 | 		return E_FAIL;
 63 | 
 64 | 	hr = (*pfnD3D11on12CreateDevice)(d3d12device,
 65 | 		Flags, pFeatureLevels, FeatureLevels,
 66 | 		reinterpret_cast<IUnknown**>(&d3d12queue),
 67 | 		1, 0, ppDevice, ppImmediateContext, pFeatureLevel);
 68 | 	
 69 | 	d3d12device->Release();
 70 | 	return hr;
 71 | }
 72 | 
 73 | 
 74 | HRESULT __stdcall D3D11CreateDeviceAndSwapChain(
 75 | 	IDXGIAdapter*         pAdapter,
 76 | 	D3D_DRIVER_TYPE       DriverType,
 77 | 	HMODULE               Software,
 78 | 	UINT                  Flags,
 79 | 	const D3D_FEATURE_LEVEL*    pFeatureLevels,
 80 | 	UINT                  FeatureLevels,
 81 | 	UINT                  SDKVersion,
 82 | 	const DXGI_SWAP_CHAIN_DESC* pSwapChainDesc,
 83 | 	IDXGISwapChain**      ppSwapChain,
 84 | 	ID3D11Device**        ppDevice,
 85 | 	D3D_FEATURE_LEVEL*    pFeatureLevel,
 86 | 	ID3D11DeviceContext** ppImmediateContext) {
 87 | 	if (ppSwapChain && !pSwapChainDesc)
 88 | 		return E_INVALIDARG;
 89 | 
 90 | 	ID3D11Device*        d3d11Device;
 91 | 	ID3D11DeviceContext* d3d11Context;
 92 | 
 93 | 	HRESULT status = D3D11CreateDevice(pAdapter, DriverType,
 94 | 		Software, Flags, pFeatureLevels, FeatureLevels,
 95 | 		SDKVersion, &d3d11Device, pFeatureLevel, &d3d11Context);
 96 | 
 97 | 	if (FAILED(status))
 98 | 		return status;
 99 | 
100 | 	if (ppSwapChain) {
101 | 		IDXGIDevice*  dxgiDevice = nullptr;
102 | 		IDXGIAdapter* dxgiAdapter = nullptr;
103 | 		IDXGIFactory* dxgiFactory = nullptr;
104 | 
105 | 		HRESULT hr = d3d11Device->QueryInterface(IID_PPV_ARGS(&dxgiDevice));
106 | 		
107 | 		if (FAILED(hr))
108 | 			return E_INVALIDARG;
109 | 
110 | 		hr = dxgiDevice->GetParent(IID_PPV_ARGS(&dxgiAdapter));
111 | 		dxgiDevice->Release();
112 | 
113 | 		if (FAILED(hr))
114 | 			return E_INVALIDARG;
115 | 
116 | 		hr = dxgiAdapter->GetParent(IID_PPV_ARGS(&dxgiFactory));
117 | 		dxgiAdapter->Release();
118 | 
119 | 		if (FAILED(hr))
120 | 			return E_INVALIDARG;
121 | 
122 | 		DXGI_SWAP_CHAIN_DESC desc = *pSwapChainDesc;
123 | 		hr = dxgiFactory->CreateSwapChain(d3d11Device, &desc, ppSwapChain);
124 | 		dxgiFactory->Release();
125 | 
126 | 		if (FAILED(hr))
127 | 			return hr;
128 | 	}
129 | 
130 | 	if (ppDevice != nullptr)
131 | 		*ppDevice = d3d11Device;
132 | 	else
133 | 		d3d11Device->Release();
134 | 
135 | 	if (ppImmediateContext != nullptr)
136 | 		*ppImmediateContext = d3d11Context;
137 | 	else
138 | 		d3d11Context->Release();
139 | 
140 | 	return S_OK;
141 | }


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/d3d11.def:
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1 | LIBRARY D3D11.DLL
2 | EXPORTS  
3 |     D3D11CreateDevice
4 |     D3D11CreateDeviceAndSwapChain
5 | 


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