Direct3D 10 Interoperability

enum CUd3d10DeviceList

CUDA devices corresponding to a D3D10 device

Enumerator:

CU_D3D10_DEVICE_LIST_ALL

The CUDA devices for all GPUs used by a D3D10 device

CU_D3D10_DEVICE_LIST_CURRENT_FRAME

The CUDA devices for the GPUs used by a D3D10 device in its currently rendering frame

CU_D3D10_DEVICE_LIST_NEXT_FRAME

The CUDA devices for the GPUs to be used by a D3D10 device in the next frame

CUresult cuD3D10GetDevice (CUdevice * pCudaDevice, IDXGIAdapter * pAdapter)

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.

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CUresult cuD3D10GetDevices (unsigned int * pCudaDeviceCount, CUdevice * pCudaDevices, unsigned int cudaDeviceCount, ID3D10Device * pD3D10Device, CUd3d10DeviceList deviceList)

Returns in *pCudaDeviceCount the number of CUDA-compatible device corresponding to the Direct3D 10 device pD3D10Device. Also returns in *pCudaDevices at most cudaDeviceCount of the CUDA-compatible devices corresponding to the Direct3D 10 device pD3D10Device.

If any of the GPUs being used to render pDevice are not CUDA capable then the call will return CUDA_ERROR_NO_DEVICE.

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

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.
• Resources allocated as shared 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.

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