table of contents
clCreateFromD3D10BufferKHR - Creates an OpenCL buffer object from a Direct3D 10 buffer.
cl_mem clCreateFromD3D10BufferKHR(cl_context context, cl_mem_flags flags, ID3D10Buffer *resource, cl_int *errcode_ret);
The size of the returned OpenCL buffer object is the same as the size of resource. This call will increment the internal Direct3D reference count on resource. The internal Direct3D reference count on resource will be decremented when the OpenCL reference count on the returned OpenCL memory object drops to zero.
General information about sharing memory objects with Direct3D 10 follows.
The goal of this extension is to provide interoperability between OpenCL and Direct3D 10. This is designed to function analogously to the OpenGL interoperability. If this extension is supported by an implementation, the string "cl_khr_d3d10_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(3clc).
As currently proposed, the interfaces for this extension would be provided in cl_d3d10.h.
This section discusses OpenCL functions that allow applications to use Direct3D 10 resources as OpenCL memory objects. This allows efficient sharing of data between OpenCL and Direct3D 10. The OpenCL API may be used to execute kernels that read and/or write memory objects that are also Direct3D 10 resources. An OpenCL image object may be created from a Direct3D 10 texture resource. An OpenCL buffer object may be created from a Direct3D 10 buffer resource. OpenCL memory objects may be created from Direct3D 10 objects if and only if the OpenCL context has been created from a Direct3D 10 device. Lifetime of Shared Objects.PP An OpenCL memory object created from a Direct3D 10 resource remains valid as long as the corresponding Direct3D 10 resource has not been deleted. If the Direct3D 10 resource is deleted through the Direct3D 10 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 10 device specified via the context create parameter CL_CONTEXT_D3D10_DEVICE_KHR will increment the internal Direct3D reference count on the specified Direct3D 10 device. The internal Direct3D reference count on that Direct3D 10 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 10 device from which the OpenCL context was created. If the Direct3D 10 device is deleted through the Direct3D 10 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.
Returns CL_SUCCESS returns a valid non-zero OpenCL buffer object and errcode_ret is set to CL_SUCCESS if the buffer object is created successfully. Otherwise, it returns a NULL value with one of the following error values returned in errcode_ret:
cl_khr_d3d10_sharing(3clc), clGetDeviceIDsFromD3D10KHR(3clc), clCreateFromD3D10Texture2DKHR(3clc), clCreateFromD3D10Texture3DKHR(3clc), clEnqueueAcquireD3D10ObjectsKHR(3clc), clEnqueueReleaseD3D10ObjectsKHR(3clc)
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- OpenCL Specification
|01/14/2021||The Khronos Group|