Description
The goal of this extension is to provide interoperability between
OpenCL and Direct3D 11. This is designed to function analogously
to the OpenGL
interoperability as defined in sections 9.7 and 9.8.
If this extension is supported by an implementation, the string "cl_khr_d3d11_sharing"
will be present in the CL_PLATFORM_EXTENSIONS
or CL_DEVICE_EXTENSIONS string described in
the table of allowed values for param_name for
clGetDeviceInfo or
clGetPlatformInfo.
As currently proposed, the interfaces for this extension are provided in the header file
cl_d3d11.h.
If the cl_khr_d3d11_sharing extension is supported, then the following functions
are enabled:
The OpenCL functions enabled by the cl_khr_d3d11_sharing extension
allow applications to use Direct3D 11 resources as OpenCL memory objects. This allows
efficient sharing of data between OpenCL and Direct3D 11. The OpenCL API may be used
to execute kernels that read and/or write memory objects that are also Direct3D 11
resources. An OpenCL image object may be created from a Direct3D 11 texture resource. An
OpenCL buffer object may be created from a Direct3D 11 buffer resource. OpenCL memory
objects may be created from Direct3D 11 objects if and only if the OpenCL context
has been created from a Direct3D 11 device.
Lifetime of Shared [D3D11] Objects
An OpenCL memory object created from a Direct3D 11 resource remains valid as long as the corresponding Direct3D 11 resource has not been deleted. If the Direct3D 11 resource is deleted through the Direct3D 11 API, subsequent use of the OpenCL memory object will result in undefined behavior, including but not limited to possible OpenCL errors, data corruption, and program termination.
The successful creation of a cl_context against a Direct3D 11 device specified via the context
create parameter CL_CONTEXT_D3D11_DEVICE_KHR will increment the internal Direct3D
reference count on the specified Direct3D 11 device. The internal Direct3D reference count on
that Direct3D 11 device will be decremented when the OpenCL reference count on the returned
OpenCL context drops to zero.
The OpenCL context and corresponding command-queues are dependent on the existence of the Direct3D 11 device from which the OpenCL context was created. If the Direct3D 11 device is deleted through the Direct3D 11 API, subsequent use of the OpenCL context will result in undefined behavior, including but not limited to possible OpenCL errors, data corruption, and program termination.
Also see
EXTENSION, clGetDeviceIDsFromD3D11KHR, clCreateFromD3D11BufferKHR, clCreateFromD3D11Texture2DKHR, clCreateFromD3D11Texture3DKHR, clEnqueueAcquireD3D10ObjectsKHR, clEnqueueReleaseD3D11ObjectsKHR
Copyright © 2007-2013 The Khronos Group Inc.
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