D3D11On12CreateDevice 函数 (d3d11on12.h)
创建在 Direct3D 12 中使用 Direct3D 11 功能的设备，指定要用于 Direct3D 11 互操作的预先存在的 Direct3D 12 设备。
语法
HRESULT D3D11On12CreateDevice(
[in] IUnknown *pDevice,
UINT Flags,
[in, optional] const D3D_FEATURE_LEVEL *pFeatureLevels,
UINT FeatureLevels,
[in, optional] IUnknown * const *ppCommandQueues,
UINT NumQueues,
UINT NodeMask,
[out, optional] ID3D11Device **ppDevice,
[out, optional] ID3D11DeviceContext **ppImmediateContext,
[out, optional] D3D_FEATURE_LEVEL *pChosenFeatureLevel
);
参数
[in] pDevice
类型： IUnknown*
指定要用于 Direct3D 11 互操作的预先存在的 Direct3D 12 设备。 不能为 NULL。
Flags
类型： UINT
D3D11_CREATE_DEVICE_FLAG中的一个或多个按位 OR 标志。 这些标志与 D3D11CreateDeviceAndSwapChain 使用的标志相同。 指定要启用的运行时 层 。 标志 必须与设备标志兼容，并且其 NodeMask 必须是提供给当前 API 的 NodeMask 的子集。
[in, optional] pFeatureLevels
类型： const D3D_FEATURE_LEVEL*
以下任一项的数组：
- D3D_FEATURE_LEVEL_12_1
- D3D_FEATURE_LEVEL_12_0
- D3D_FEATURE_LEVEL_11_1
- D3D_FEATURE_LEVEL_11_0
- D3D_FEATURE_LEVEL_10_1
- D3D_FEATURE_LEVEL_10_0
- D3D_FEATURE_LEVEL_9_3
- D3D_FEATURE_LEVEL_9_2
- D3D_FEATURE_LEVEL_9_1
小于或等于 Direct3D 12 设备功能级别的第一个功能级别将用于执行 Direct3D 11 验证。 如果未提供可接受的功能级别，则创建将失败。 提供 NULL 将默认为 Direct3D 12 设备的功能级别。
FeatureLevels
类型： UINT
(的大小，即 pFeatureLevels 数组) 元素数。
[in, optional] ppCommandQueues
类型： IUnknown* const *
供 D3D11On12 使用的唯一队列数组。 队列必须是 3D 命令队列类型。
NumQueues
类型： UINT
(的大小，即 ) ppCommandQueues 数组中的元素数。
NodeMask
类型： UINT
要使用的 Direct3D 12 设备的哪个节点。 只能设置 1 位。
[out, optional] ppDevice
类型： ID3D11Device**
指向返回的 ID3D11Device 的指针。 可以为 NULL。
[out, optional] ppImmediateContext
类型： ID3D11DeviceContext**
指向返回的 ID3D11DeviceContext 的指针。 可以为 NULL。
[out, optional] pChosenFeatureLevel
类型： D3D_FEATURE_LEVEL*
指向返回的功能级别的指针。 可以为 NULL。
返回值
类型： HRESULT
此方法返回为 D3D11CreateDevice 记录的 Direct3D 12 返回代码之一。
如果在Flags 中指定了D3D11_CREATE_DEVICE_DEBUG，并且计算机上安装了调试层的版本不正确，则此方法将返回DXGI_ERROR_SDK_COMPONENT_MISSING。 安装最新的 Windows SDK 以获取正确的版本。
备注
函数签名PFN_D3D11ON12_CREATE_DEVICE以 typedef 形式提供，因此可以使用动态链接技术 (GetProcAddress) ，而不是静态链接。
示例
若要通过 11On12 设备使用 Direct2D 通过 Direct3D 12 呈现文本，请加载呈现管道依赖项。
// Load the rendering pipeline dependencies.
void D3D1211on12::LoadPipeline()
{
UINT d3d11DeviceFlags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
D2D1_FACTORY_OPTIONS d2dFactoryOptions = {};
#if defined(_DEBUG)
// Enable the D2D debug layer.
d2dFactoryOptions.debugLevel = D2D1_DEBUG_LEVEL_INFORMATION;
// Enable the Direct3D 11 debug layer.
d3d11DeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
// Enable the Direct3D 12 debug layer.
{
ComPtr<ID3D12Debug> debugController;
if (SUCCEEDED(D3D12GetDebugInterface(IID_PPV_ARGS(&debugController))))
{
debugController->EnableDebugLayer();
}
}
#endif
ComPtr<IDXGIFactory4> factory;
ThrowIfFailed(CreateDXGIFactory1(IID_PPV_ARGS(&factory)));
if (m_useWarpDevice)
{
ComPtr<IDXGIAdapter> warpAdapter;
ThrowIfFailed(factory->EnumWarpAdapter(IID_PPV_ARGS(&warpAdapter)));
ThrowIfFailed(D3D12CreateDevice(
warpAdapter.Get(),
D3D_FEATURE_LEVEL_11_0,
IID_PPV_ARGS(&m_d3d12Device)
));
}
else
{
ComPtr<IDXGIAdapter1> hardwareAdapter;
GetHardwareAdapter(factory.Get(), &hardwareAdapter);
ThrowIfFailed(D3D12CreateDevice(
hardwareAdapter.Get(),
D3D_FEATURE_LEVEL_11_0,
IID_PPV_ARGS(&m_d3d12Device)
));
}
// Describe and create the command queue.
D3D12_COMMAND_QUEUE_DESC queueDesc = {};
queueDesc.Flags = D3D12_COMMAND_QUEUE_FLAG_NONE;
queueDesc.Type = D3D12_COMMAND_LIST_TYPE_DIRECT;
ThrowIfFailed(m_d3d12Device->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&m_commandQueue)));
// Describe the swap chain.
DXGI_SWAP_CHAIN_DESC swapChainDesc = {};
swapChainDesc.BufferCount = FrameCount;
swapChainDesc.BufferDesc.Width = m_width;
swapChainDesc.BufferDesc.Height = m_height;
swapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
swapChainDesc.OutputWindow = Win32Application::GetHwnd();
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.Windowed = TRUE;
ComPtr<IDXGISwapChain> swapChain;
ThrowIfFailed(factory->CreateSwapChain(
m_commandQueue.Get(), // Swap chain needs the queue so that it can force a flush on it.
&swapChainDesc,
&swapChain
));
ThrowIfFailed(swapChain.As(&m_swapChain));
// This sample does not support fullscreen transitions.
ThrowIfFailed(factory->MakeWindowAssociation(Win32Application::GetHwnd(), DXGI_MWA_NO_ALT_ENTER));
m_frameIndex = m_swapChain->GetCurrentBackBufferIndex();
// Create an 11 device wrapped around the 12 device and share
// 12's command queue.
ComPtr<ID3D11Device> d3d11Device;
ThrowIfFailed(D3D11On12CreateDevice(
m_d3d12Device.Get(),
d3d11DeviceFlags,
nullptr,
0,
reinterpret_cast<IUnknown**>(m_commandQueue.GetAddressOf()),
1,
0,
&d3d11Device,
&m_d3d11DeviceContext,
nullptr
));
// Query the 11On12 device from the 11 device.
ThrowIfFailed(d3d11Device.As(&m_d3d11On12Device));
// Create D2D/DWrite components.
{
D2D1_DEVICE_CONTEXT_OPTIONS deviceOptions = D2D1_DEVICE_CONTEXT_OPTIONS_NONE;
ThrowIfFailed(D2D1CreateFactory(
D2D1_FACTORY_TYPE_SINGLE_THREADED,
__uuidof(ID2D1Factory3),
&d2dFactoryOptions,
&m_d2dFactory));
ComPtr<IDXGIDevice> dxgiDevice;
ThrowIfFailed(m_d3d11On12Device.As(&dxgiDevice));
ThrowIfFailed(m_d2dFactory->CreateDevice(dxgiDevice.Get(), &m_d2dDevice));
ThrowIfFailed(m_d2dDevice->CreateDeviceContext(deviceOptions, &m_d2dDeviceContext));
ThrowIfFailed(DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
&m_dWriteFactory));
}
// Query the desktop's dpi settings, which will be used to create
// D2D's render targets.
float dpi = GetDpiForWindow(Win32Application::GetHwnd());
D2D1_BITMAP_PROPERTIES1 bitmapProperties = D2D1::BitmapProperties1(
D2D1_BITMAP_OPTIONS_TARGET | D2D1_BITMAP_OPTIONS_CANNOT_DRAW,
D2D1::PixelFormat(DXGI_FORMAT_UNKNOWN, D2D1_ALPHA_MODE_PREMULTIPLIED),
dpi,
dpi
);
// Create descriptor heaps.
{
// Describe and create a render target view (RTV) descriptor heap.
D3D12_DESCRIPTOR_HEAP_DESC rtvHeapDesc = {};
rtvHeapDesc.NumDescriptors = FrameCount;
rtvHeapDesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
rtvHeapDesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
ThrowIfFailed(m_d3d12Device->CreateDescriptorHeap(&rtvHeapDesc, IID_PPV_ARGS(&m_rtvHeap)));
m_rtvDescriptorSize =
m_d3d12Device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
}
// Create frame resources.
{
CD3DX12_CPU_DESCRIPTOR_HANDLE rtvHandle(m_rtvHeap->GetCPUDescriptorHandleForHeapStart());
// Create a RTV, D2D render target, and a command allocator for each frame.
for (UINT n = 0; n < FrameCount; n++)
{
ThrowIfFailed(m_swapChain->GetBuffer(n, IID_PPV_ARGS(&m_renderTargets[n])));
m_d3d12Device->CreateRenderTargetView(m_renderTargets[n].Get(), nullptr, rtvHandle);
// Create a wrapped 11On12 resource of this back buffer. Since we are
// rendering all Direct3D 12 content first and then all D2D content, we specify
// the In resource state as RENDER_TARGET - because Direct3D 12 will have last
// used it in this state - and the Out resource state as PRESENT. When
// ReleaseWrappedResources() is called on the 11On12 device, the resource
// will be transitioned to the PRESENT state.
D3D11_RESOURCE_FLAGS d3d11Flags = { D3D11_BIND_RENDER_TARGET };
ThrowIfFailed(m_d3d11On12Device->CreateWrappedResource(
m_renderTargets[n].Get(),
&d3d11Flags,
D3D12_RESOURCE_STATE_RENDER_TARGET,
D3D12_RESOURCE_STATE_PRESENT,
IID_PPV_ARGS(&m_wrappedBackBuffers[n])
));
// Create a render target for D2D to draw directly to this back buffer.
ComPtr<IDXGISurface> surface;
ThrowIfFailed(m_wrappedBackBuffers[n].As(&surface));
ThrowIfFailed(m_d2dDeviceContext->CreateBitmapFromDxgiSurface(
surface.Get(),
&bitmapProperties,
&m_d2dRenderTargets[n]
));
rtvHandle.Offset(1, m_rtvDescriptorSize);
ThrowIfFailed(m_d3d12Device->CreateCommandAllocator(
D3D12_COMMAND_LIST_TYPE_DIRECT,
IID_PPV_ARGS(&m_commandAllocators[n])));
}
}
}
请参阅 有关 Direct3D 12 参考内容中的示例代码的说明。
要求
| 目标平台 | Windows |
| 标头 | d3d11on12.h |
| Library | D3D11.lib |
| DLL | D3D11.dll |
另请参阅
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