CUDA devices corresponding to a D3D9 device

Gets the device number for an adapter.

Parameters

device

- Returns the device corresponding to pszAdapterName

pszAdapterName

- D3D9 adapter to get device for

Returns

cudaSuccess, cudaErrorInvalidValue, cudaErrorUnknown

Description

Returns in *device the CUDA-compatible device corresponding to the adapter name pszAdapterName obtained from EnumDisplayDevices or IDirect3D9::GetAdapterIdentifier(). If no device on the adapter with name pszAdapterName is CUDA-compatible then the call will fail.

See also:

cudaD3D9SetDirect3DDevice, cudaGraphicsD3D9RegisterResource, cuD3D9GetDevice

Gets the CUDA devices corresponding to a Direct3D 9 device.

Parameters

pCudaDeviceCount

- Returned number of CUDA devices corresponding to pD3D9Device

pCudaDevices

- Returned CUDA devices corresponding to pD3D9Device

cudaDeviceCount

- The size of the output device array pCudaDevices

pD3D9Device

- Direct3D 9 device to query for CUDA devices

deviceList

- The set of devices to return. This set may be cudaD3D9DeviceListAll for all devices, cudaD3D9DeviceListCurrentFrame for the devices used to render the current frame (in SLI), or cudaD3D9DeviceListNextFrame for the devices used to render the next frame (in SLI).

Returns

cudaSuccess, cudaErrorNoDevice, cudaErrorUnknown

Description

Returns in *pCudaDeviceCount the number of CUDA-compatible devices corresponding to the Direct3D 9 device pD3D9Device. Also returns in *pCudaDevices at most cudaDeviceCount of the the CUDA-compatible devices corresponding to the Direct3D 9 device pD3D9Device.

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

See also:

cudaGraphicsUnregisterResource, cudaGraphicsMapResources, cudaGraphicsSubResourceGetMappedArray, cudaGraphicsResourceGetMappedPointer, cuD3D9GetDevices

Gets the Direct3D device against which the current CUDA context was created.

Parameters

ppD3D9Device

- Returns the Direct3D device for this thread

Returns

cudaSuccess, cudaErrorInvalidGraphicsContext, cudaErrorUnknown

Description

Returns in *ppD3D9Device the Direct3D device against which this CUDA context was created in cudaD3D9SetDirect3DDevice().

See also:

cudaD3D9SetDirect3DDevice, cuD3D9GetDirect3DDevice

Sets the Direct3D 9 device to use for interoperability with a CUDA device.

Parameters

pD3D9Device

- Direct3D device to use for this thread

device

- The CUDA device to use. This device must be among the devices returned when querying cudaD3D9DeviceListAll from cudaD3D9GetDevices, may be set to -1 to automatically select an appropriate CUDA device.

Returns

cudaSuccess, cudaErrorInitializationError, cudaErrorInvalidValue, cudaErrorSetOnActiveProcess

Description

Records pD3D9Device as the Direct3D 9 device to use for Direct3D 9 interoperability with the CUDA device device and sets device as the current device for the calling host thread.

If device has already been initialized then this call will fail with the error cudaErrorSetOnActiveProcess. In this case it is necessary to reset device using cudaDeviceReset() before Direct3D 9 interoperability on device may be enabled.

Successfully initializing CUDA interoperability with pD3D9Device will increase the internal reference count on pD3D9Device. This reference count will be decremented when device is reset using cudaDeviceReset().

Note that this function is never required for correct functionality. Use of this function will result in accelerated interoperability only when the operating system is Windows Vista or Windows 7, and the device pD3DDdevice is not an IDirect3DDevice9Ex. In all other cirumstances, this function is not necessary.

See also:

cudaD3D9GetDevice, cudaGraphicsD3D9RegisterResource, cudaDeviceReset

Register a Direct3D 9 resource for access by CUDA.

Parameters

resource

- Pointer to returned resource handle

pD3DResource

- Direct3D resource to register

flags

- Parameters for resource registration

Returns

cudaSuccess, cudaErrorInvalidDevice, cudaErrorInvalidValue, cudaErrorInvalidResourceHandle, cudaErrorUnknown

Description

Registers the Direct3D 9 resource pD3DResource for access by CUDA.

If this call is successful then the application will be able to map and unmap this resource until it is unregistered through cudaGraphicsUnregisterResource(). Also on success, this call will increase the internal reference count on pD3DResource. This reference count will be decremented when this resource is unregistered through cudaGraphicsUnregisterResource().

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

The type of pD3DResource must be one of the following.

• IDirect3DVertexBuffer9: may be accessed through a device pointer

• IDirect3DIndexBuffer9: may be accessed through a device pointer

• IDirect3DSurface9: may be accessed through an array. Only stand-alone objects of type IDirect3DSurface9 may be explicitly shared. In particular, individual mipmap levels and faces of cube maps may not be registered directly. To access individual surfaces associated with a texture, one must register the base texture object.

• IDirect3DBaseTexture9: individual surfaces on this texture may be accessed through an array.

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

• cudaGraphicsRegisterFlagsNone: Specifies no hints about how this resource will be used.

• cudaGraphicsRegisterFlagsSurfaceLoadStore: Specifies that CUDA will bind this resource to a surface reference.

• cudaGraphicsRegisterFlagsTextureGather: 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 formats is as follows:

• D3DFMT_L8

• D3DFMT_L16

• D3DFMT_A8R8G8B8

• D3DFMT_X8R8G8B8

• D3DFMT_G16R16

• D3DFMT_A8B8G8R8

• D3DFMT_A8

• D3DFMT_A8L8

• D3DFMT_Q8W8V8U8

• D3DFMT_V16U16

• D3DFMT_A16B16G16R16F

• D3DFMT_A16B16G16R16

• D3DFMT_R32F

• D3DFMT_G16R16F

• D3DFMT_A32B32G32R32F

• D3DFMT_G32R32F

• D3DFMT_R16F

If pD3DResource is of incorrect type or is already registered, then cudaErrorInvalidResourceHandle is returned. If pD3DResource cannot be registered, then cudaErrorUnknown is returned.

See also:

cudaD3D9SetDirect3DDevice, cudaGraphicsUnregisterResource, cudaGraphicsMapResources, cudaGraphicsSubResourceGetMappedArray, cudaGraphicsResourceGetMappedPointer, cuGraphicsD3D9RegisterResource