NAME

       clGetDeviceIDsFromD3D10KHR - Querying OpenCL Devices Corresponding to Direct3D 10 Devices.

       cl_int clGetDeviceIDsFromD3D10KHR(cl_platform_id platform,
                                         cl_d3d10_device_source_khr d3d_device_source,
                                         void *d3d_object,
                                         cl_d3d10_device_set_khr d3d_device_set,
                                         cl_uint num_entries, cl_device_id *devices,
                                         cl_uint *num_devices);

PARAMETERS

       platform
           Refers to the platform ID returned by clGetPlatformIDs(3clc).

       d3d_device_source
           Specifies the type of d3d_object and may be one of the following:.

           ┌──────────────────────────┬────────────────────┐
           │cl_d3d_device_source_khr  │ Type of d3d_object │
           ├──────────────────────────┼────────────────────┤
           │CL_D3D10_DEVICE_KHR       │ ID3D10Device *     │
           ├──────────────────────────┼────────────────────┤
           │CL_D3D10_DXGI_ADAPTER_KHR │ IDXGIAdapter *     │
           └──────────────────────────┴────────────────────┘

       d3d_object
           Specifies the object whose corresponding OpenCL devices are being queried. The type of
           d3d_object must be as specified in the table above.

       d3d_device_set
           Specifies the set of devices to return, and must be one of the following:

           ┌───────────────────────────────────┬──────────────────────────────────┐
           │cl_d3d_device_set_khr              │ Devices returned in devices      │
           ├───────────────────────────────────┼──────────────────────────────────┤
           │CL_PREFERRED_DEVICES_FOR_D3D10_KHR │ The OpenCL devices associated    │
           │                                   │ with the specified Direct3D      │
           │                                   │ object.                          │
           ├───────────────────────────────────┼──────────────────────────────────┤
           │CL_ALL_DEVICES_FOR_D3D10_KHR       │ All OpenCL devices which may     │
           │                                   │ interoperate with the specified  │
           │                                   │ Direct3D object.  Performance of │
           │                                   │ sharing data on these devices    │
           │                                   │ may be considerably less than on │
           │                                   │ the preferred devices.           │
           └───────────────────────────────────┴──────────────────────────────────┘

       num_entries
           The number of cl_device_id entries that can be added to devices. If devices is not
           NULL, the num_entries must be greater than zero.

       devices
           Returns a list of OpenCL devices found. The cl_device_id values returned in devices
           can be used to identify a specific OpenCL device. If devices is NULL, this argument is
           ignored. The number of OpenCL devices returned is the mininum of the value specified
           by num_entries and the number of OpenCL devices corresponding to d3d_object.

       num_devices
           Returns the number of OpenCL devices available that correspond to d3d_object. If
           num_devices is NULL, this argument is ignored.

DESCRIPTION

       The OpenCL devices corresponding to a Direct3D 10 device may be queried. The OpenCL
       devices corresponding to a DXGI adapter may also be queried. The OpenCL devices
       corresponding to a Direct3D 10 device will be a subset of the OpenCL devices corresponding
       to the DXGI adapter against which the Direct3D 10 device was created.

NOTES

       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.

ERRORS

       Returns CL_SUCCESS if the function is executed successfully. Otherwise it may return:

       ·   CL_INVALID_PLATFORM if platform is not a valid platform.

       ·   CL_INVALID_VALUE if d3d_device_source is not a valid value, d3d_device_set is not a
           valid value, num_entries is equal to zero and devices is not NULL, or if both
           num_devices and devices are NULL.

       ·   CL_DEVICE_NOT_FOUND if no OpenCL devices that correspond to d3d_object were found.

SPECIFICATION

       OpenCL Specification[1]

SEE ALSO

       cl_khr_d3d10_sharing(3clc), clCreateFromD3D10BufferKHR(3clc),
       clCreateFromD3D10Texture2DKHR(3clc), clCreateFromD3D10Texture3DKHR(3clc),
       clEnqueueAcquireD3D10ObjectsKHR(3clc), clEnqueueReleaseD3D10ObjectsKHR(3clc)

AUTHORS

       The Khronos Group

COPYRIGHT

       Copyright © 2007-2011 The Khronos Group Inc.
       Permission is hereby granted, free of charge, to any person obtaining a copy of this
       software and/or associated documentation files (the "Materials"), to deal in the Materials
       without restriction, including without limitation the rights to use, copy, modify, merge,
       publish, distribute, sublicense, and/or sell copies of the Materials, and to permit
       persons to whom the Materials are furnished to do so, subject to the condition that this
       copyright notice and permission notice shall be included in all copies or substantial
       portions of the Materials.

NOTES

        1. OpenCL Specification
           page 71, section 9.9.7.1 - Querying OpenCL Devices Corresponding to... 11...