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| <title>clGetDeviceIDsFromD3D11KHR</title> |
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| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clGetDeviceIDsFromD3D10KHR"></a> |
| <h1>clGetDeviceIDsFromD3D11KHR</h1> |
| <p>Querying OpenCL Devices Corresponding to Direct3D 11 Devices.</p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_int</a> |
| <strong class="fsfunc">clGetDeviceIDsFromD3D11KHR</strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_platform_id</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">platform</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_d3d10_device_source_khr" target="pagedisplay">cl_d3d11_device_source_khr</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">d3d_device_source</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">void</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*d3d_object</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_d3d10_device_set_khr" target="pagedisplay">cl_d3d11_device_set_khr</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">d3d_device_set</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_entries</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_device_id</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*devices</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*num_devices</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="parameters"></a> |
| <h2>Parameters</h2> |
| <div class="variablelist"> |
| <dl class="variablelist"> |
| <dt> |
| <span class="term"> |
| <code class="varname">platform</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Refers to the platform ID returned by |
| <a class="citerefentry" href="clGetPlatformIDs.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformIDs</span></span></a>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">d3d_device_source</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the type of <code class="varname">d3d_object</code> and may be one of the following (Table 9.11.1): |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_d3d_device_source_khr</th> |
| <th align="left">Type of <code class="varname">d3d_object</code></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_D3D11_DEVICE_KHR</code> |
| </td> |
| <td align="left">ID3D11Device *</td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_D3D11_DXGI_ADAPTER_KHR</code> |
| </td> |
| <td align="left">IDXGIAdapter *</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">d3d_object</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the object whose corresponding OpenCL devices are being queried. The type of |
| <code class="varname">d3d_object</code> must be as specified in the table above. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">d3d_device_set</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the set of devices to return, and must be one of the following (Table 9.11.2): |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_d3d_device_set_khr</th> |
| <th align="left">Devices returned in <code class="varname">devices</code></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_PREFERRED_DEVICES_FOR_D3D11_KHR</code> |
| </td> |
| <td align="left"> |
| The OpenCL devices associated with the specified Direct3D object. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_ALL_DEVICES_FOR_D3D11_KHR</code> |
| </td> |
| <td align="left"> |
| 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. |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">num_entries</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| The number of <span class="type">cl_device_id</span> entries that can be added to |
| <code class="varname">devices</code>. If <code class="varname">devices</code> is not NULL, the |
| <code class="varname">num_entries</code> must be greater than zero. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">devices</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Returns a list of OpenCL devices found. The <span class="type">cl_device_id</span> values |
| returned in <code class="varname">devices</code> can be used to identify a specific |
| OpenCL device. If <code class="varname">devices</code> is NULL, this argument is |
| ignored. The number of OpenCL devices returned is the mininum of the value |
| specified by <code class="varname">num_entries</code> and the number of OpenCL devices |
| corresponding to <code class="varname">d3d_object</code>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">num_devices</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Returns the number of OpenCL devices available that correspond to |
| <code class="varname">d3d_object</code>. If <code class="varname">num_devices</code> is NULL, |
| this argument is ignored. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| The OpenCL devices corresponding to a Direct3D 11 device may be queried. The OpenCL |
| devices corresponding to a DXGI adapter may also be queried. The OpenCL devices |
| corresponding to a Direct3D 11 device will be a subset of the OpenCL devices |
| corresponding to the DXGI adapter against which the Direct3D 11 device was created. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <h4><a id="id-1.7.2"></a>Sharing Memory Objects with Direct3D 11 Resources</h4> |
| <p> |
| The goal of this extension is to provide interoperability between |
| OpenCL and Direct3D 11. This is designed to function analogously |
| to the <a class="citerefentry" href="cl_khr_gl_sharing.html"><span class="citerefentry"><span class="refentrytitle">OpenGL |
| interoperability</span></span></a> 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 <code class="constant">CL_PLATFORM_EXTENSIONS</code> |
| or <code class="constant">CL_DEVICE_EXTENSIONS</code> string described in |
| the table of allowed values for <code class="varname">param_name</code> for |
| <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a> or |
| <a class="citerefentry" href="clGetPlatformInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformInfo</span></span></a>. |
| </p> |
| <p> |
| As currently proposed the interfaces for this extension would be provided in |
| <code class="code">cl_d3d11.h</code>. |
| </p> |
| <p> |
| This section discusses OpenCL functions that 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. |
| </p> |
| <h4><a id="id-1.7.6"></a>Lifetime of Shared Objects</h4> |
| <p> |
| 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. |
| </p> |
| <p> |
| The successful creation of a |
| cl_context against a Direct3D 11 device specified via the context create parameter |
| <code class="constant">CL_CONTEXT_D3D11_DEVICE_KHR</code> 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. |
| </p> |
| <p> |
| 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. |
| </p> |
| <p> |
| Properties of Direct3D 11 objects may be queried |
| using <a class="citerefentry" href="clGetMemObjectInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetMemObjectInfo</span></span></a> |
| and <a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</span></span></a> |
| with <code class="varname">param_name</code> <code class="constant">CL_MEM_D3D11_RESOURCE_KHR</code> and |
| <code class="constant">CL_IMAGE_D3D11_SUBRESOURCE_KHR</code>. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| Returns <span class="errorname">CL_SUCCESS</span> if the function is executed |
| successfully. Otherwise it may return: |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_PLATFORM</span> if <code class="varname">platform</code> is not |
| a valid platform. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">d3d_device_source</code> |
| is not a valid value, <code class="varname">d3d_device_set</code> is not a valid value, |
| <code class="varname">num_entries</code> is equal to zero and <code class="varname">devices</code> is |
| not NULL, or if both <code class="varname">num_devices</code> and <code class="varname">devices</code> |
| are NULL. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_DEVICE_NOT_FOUND</span> if no OpenCL devices that correspond |
| to <code class="varname">d3d_object</code> were found. |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p><img src="pdficon_small1.gif" /> |
| <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-extensions.pdf#page=100" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="cl_khr_d3d11_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d11_sharing</span></span></a> |
| </p> |
| </div> |
| <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2015 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. |
| </div> |
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| </html> |
