6.8. Direct3D 10 Interoperability

This section describes the Direct3D 10 interoperability functions of the low-level CUDA driver application programming interface.

Note that mapping of Direct3D 10 resources is performed with the graphics API agnostic, resource mapping interface described in Graphics Interoperability.

Enumerations

CUd3d10DeviceList: CUDA devices corresponding to a D3D10 device.

Functions

CUresult cuD3D10GetDevice(CUdevice *pCudaDevice, IDXGIAdapter *pAdapter): Gets the CUDA device corresponding to a display adapter.
CUresult cuD3D10GetDevices(unsigned int *pCudaDeviceCount, CUdevice *pCudaDevices, unsigned int cudaDeviceCount, ID3D10Device *pD3D10Device, CUd3d10DeviceList deviceList): Gets the CUDA devices corresponding to a Direct3D 10 device.
CUresult cuGraphicsD3D10RegisterResource(CUgraphicsResource *pCudaResource, ID3D10Resource *pD3DResource, unsigned int Flags): Register a Direct3D 10 resource for access by CUDA.

APIs

Direct3D 10 Interoperability [DEPRECATED]: This section describes deprecated Direct3D 10 interoperability functionality.

6.8.2. Enumerations

enum CUd3d10DeviceList

CUDA devices corresponding to a D3D10 device.

Values:

enumerator CU_D3D10_DEVICE_LIST_ALL: The CUDA devices for all GPUs used by a D3D10 device.

enumerator CU_D3D10_DEVICE_LIST_CURRENT_FRAME: The CUDA devices for the GPUs used by a D3D10 device in its currently rendering frame.

enumerator CU_D3D10_DEVICE_LIST_NEXT_FRAME: The CUDA devices for the GPUs to be used by a D3D10 device in the next frame.

6.8.3. Functions

CUresult cuD3D10GetDevice(CUdevice *pCudaDevice, IDXGIAdapter *pAdapter)

Gets the CUDA device corresponding to a display adapter.

Returns in *pCudaDevice the CUDA-compatible device corresponding to the adapter pAdapter obtained from ::IDXGIFactory::EnumAdapters.

If no device on pAdapter is CUDA-compatible then the call will fail.

See also

cuD3D10GetDevice, ::cudaD3D10GetDevices

Note

Note that this function may also return error codes from previous, asynchronous launches.

Parameters

pCudaDeviceCount – - Returned number of CUDA devices corresponding to pD3D10Device
pCudaDevices – - Returned CUDA devices corresponding to pD3D10Device
cudaDeviceCount – - The size of the output device array pCudaDevices
pD3D10Device – - Direct3D 10 device to query for CUDA devices
deviceList – - The set of devices to return. This set may be CU_D3D10_DEVICE_LIST_ALL for all devices, CU_D3D10_DEVICE_LIST_CURRENT_FRAME for the devices used to render the current frame (in SLI), or CU_D3D10_DEVICE_LIST_NEXT_FRAME for the devices used to render the next frame (in SLI).

Returns

CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_NO_DEVICE, CUDA_ERROR_INVALID_VALUE, CUDA_ERROR_NOT_FOUND, CUDA_ERROR_UNKNOWN

CUresult cuGraphicsD3D10RegisterResource(CUgraphicsResource *pCudaResource, ID3D10Resource *pD3DResource, unsigned int Flags)

Register a Direct3D 10 resource for access by CUDA.

Registers the Direct3D 10 resource pD3DResource for access by CUDA and returns a CUDA handle to pD3Dresource in pCudaResource. The handle returned in pCudaResource may be used to map and unmap this resource until it is unregistered. On success this call will increase the internal reference count on pD3DResource. This reference count will be decremented when this resource is unregistered through cuGraphicsUnregisterResource().

This call is potentially high-overhead and should not be called every frame in interactive applications.

The type of pD3DResource must be one of the following.

::ID3D10Buffer: may be accessed through a device pointer.
::ID3D10Texture1D: individual subresources of the texture may be accessed via arrays
::ID3D10Texture2D: individual subresources of the texture may be accessed via arrays
::ID3D10Texture3D: individual subresources of the texture may be accessed via arrays

The Flags argument may be used to specify additional parameters at register time. The valid values for this parameter are

CU_GRAPHICS_REGISTER_FLAGS_NONE: Specifies no hints about how this resource will be used.
CU_GRAPHICS_REGISTER_FLAGS_SURFACE_LDST: Specifies that CUDA will bind this resource to a surface reference.
CU_GRAPHICS_REGISTER_FLAGS_TEXTURE_GATHER: Specifies that CUDA will perform texture gather operations on this resource.

Not all Direct3D resources of the above types may be used for interoperability with CUDA. The following are some limitations.

The primary rendertarget may not be registered with CUDA.
Textures which are not of a format which is 1, 2, or 4 channels of 8, 16, or 32-bit integer or floating-point data cannot be shared.
Surfaces of depth or stencil formats cannot be shared.

A complete list of supported DXGI formats is as follows. For compactness the notation A_{B,C,D} represents A_B, A_C, and A_D.

DXGI_FORMAT_A8_UNORM
DXGI_FORMAT_B8G8R8A8_UNORM
DXGI_FORMAT_B8G8R8X8_UNORM
DXGI_FORMAT_R16_FLOAT
DXGI_FORMAT_R16G16B16A16_{FLOAT,SINT,SNORM,UINT,UNORM}
DXGI_FORMAT_R16G16_{FLOAT,SINT,SNORM,UINT,UNORM}
DXGI_FORMAT_R16_{SINT,SNORM,UINT,UNORM}
DXGI_FORMAT_R32_FLOAT
DXGI_FORMAT_R32G32B32A32_{FLOAT,SINT,UINT}
DXGI_FORMAT_R32G32_{FLOAT,SINT,UINT}
DXGI_FORMAT_R32_{SINT,UINT}
DXGI_FORMAT_R8G8B8A8_{SINT,SNORM,UINT,UNORM,UNORM_SRGB}
DXGI_FORMAT_R8G8_{SINT,SNORM,UINT,UNORM}
DXGI_FORMAT_R8_{SINT,SNORM,UINT,UNORM}

If pD3DResource is of incorrect type or is already registered then CUDA_ERROR_INVALID_HANDLE is returned. If pD3DResource cannot be registered then CUDA_ERROR_UNKNOWN is returned. If Flags is not one of the above specified value then CUDA_ERROR_INVALID_VALUE is returned.