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<title>cl_khr_dx9_media_sharing</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1" />
<meta name="keywords" content="cl_khr_dx9_media_sharing" />
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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="cl_khr_dx9_media_sharing"></a>
<h1>cl_khr_dx9_media_sharing</h1>
<p>
Provide sharing of data between OpenCL and DX9.
</p>
</div>
<div class="refsect2">
<a id="synopsis"></a>
<h3>
</h3>
<div class="informaltable">
<table class="informaltable" border="0">
<colgroup>
<col align="left" class="col1" />
</colgroup>
<tbody>
<tr>
<td align="left">
#pragma OPENCL EXTENSION cl_khr_dx9_media_sharing : enable
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
If the <code class="function">cl_khr_dx9_media_sharing</code> extension is supported, then
the following functions are enabled:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem" style="list-style-type: disc">
<a class="citerefentry" href="clGetDeviceIDsFromDX9MediaAdapterKHR.html">
<span class="citerefentry">
<span class="refentrytitle">clGetDeviceIDsFromDX9MediaAdapterKHR</span>
</span>
</a>
</li>
<li class="listitem" style="list-style-type: disc">
<a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html">
<span class="citerefentry">
<span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span>
</span>
</a>
</li>
<li class="listitem" style="list-style-type: disc">
<a class="citerefentry" href="clEnqueueAcquireDX9MediaSurfacesKHR.html">
<span class="citerefentry">
<span class="refentrytitle">clEnqueueAcquireDX9MediaSurfacesKHR</span>
</span>
</a>
</li>
<li class="listitem" style="list-style-type: disc">
<a class="citerefentry" href="clEnqueueReleaseDX9MediaSurfacesKHR.html">
<span class="citerefentry">
<span class="refentrytitle">clEnqueueReleaseDX9MediaSurfacesKHR</span>
</span>
</a>
</li>
</ul>
</div>
<p>
General information about sharing memory objects with DX9 follows.
</p>
<p>
The goal of this extension is to allow applications to use media surfaces as OpenCL memory
objects. This allows efficient sharing of data between OpenCL and selected adapter APIs (only
DX9 for now). If this extension is supported, an OpenCL image object can be created from a
media surface and the OpenCL API can be used to execute kernels that read and/or write
memory objects that are media surfaces. Note that OpenCL memory objects may be created
from the adapter media surface if and only if the OpenCL context has been created from that
adapter.
</p>
<p>
If this extension is supported by an implementation, the string "cl_khr_dx9_media_sharing"
will be present in the <code class="constant">CL_PLATFORM_EXTENSIONS</code>
(see <a class="citerefentry" href="clGetPlatformInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformInfo</span></span></a>)
or <code class="constant">CL_DEVICE_EXTENSIONS</code>
(see <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a>).
</p>
<p>
As currently proposed the interfaces for this extension would be provided in
<code class="code">cl_dx9_media_sharing.h</code>.
</p>
<h4><a id="id-1.5.8"></a>Surface formats for Media Surface Sharing</h4>
<p>
This section includes the D3D surface formats
that are supported when the adapter type is one of the Direct 3D lineage. Using a D3D
surface format not listed here is an error. To extend the use of this extension to support
media adapters beyond DirectX9 tables similar to the ones in this section will need to be
defined for the surface formats supported by the new media adapter. All implementations
that support this extension are required to support the NV12 surface format, the other
surface formats supported are the same surface formats that the adapter you are sharing
with supports as long as they are listed in the tables below (Tables 9.10.3 and 9.10.4).
</p>
<div class="informaltable">
<table class="informaltable" border="1">
<colgroup>
<col align="center" class="col1" />
<col align="center" class="col2" />
</colgroup>
<thead>
<tr>
<th align="center">FOUR CC code</th>
<th align="center">CL image format (channel order, channel data type)</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center">FOURCC('N', 'V', '1', '2'), Plane 0</td>
<td align="center">
<code class="constant">CL_R, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">FOURCC('N', 'V', '1', '2'), Plane 1</td>
<td align="center">
<code class="constant">CL_RG, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">FOURCC('Y', 'V', '1', '2'), Plane 0</td>
<td align="center">
<code class="constant">CL_R, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">FOURCC('Y', 'V', '1', '2'), Plane 1</td>
<td align="center">
<code class="constant">CL_R, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">FOURCC('Y', 'V', '1', '2'), Plane 2</td>
<td align="center">
<code class="constant">CL_R, CL_UNORM_INT8</code>
</td>
</tr>
</tbody>
</table>
</div>
<p>
In the table above, NV12 Plane 0 corresponds to the luminance (Y) channel and Plane 1
corresponds to the UV channels. The YV12 Plane 0 corresponds to the Y channel, Plane
1 to the U channel and Plane 2 to the V channel. Note that the YUV formats map to
<code class="constant">CL_R</code> and <code class="constant">CL_RG</code> but do not perform any YUV to
RGB conversion and vice-versa.
</p>
<div class="informaltable">
<table class="informaltable" border="1">
<colgroup>
<col align="center" class="col1" />
<col align="center" class="col2" />
</colgroup>
<thead>
<tr>
<th align="center">D3D format</th>
<th align="center">CL image format (channel order, channel data type)</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center">D3DFMT_R32F</td>
<td align="center">
<code class="constant">CL_R, CL_FLOAT</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_R16F</td>
<td align="center">
<code class="constant">CL_R, CL_HALF_FLOAT</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_L16</td>
<td align="center">
<code class="constant">CL_R, CL_UNORM_INT16</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A8</td>
<td align="center">
<code class="constant">CL_A, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_L8</td>
<td align="center">
<code class="constant">CL_R, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_G32R32F</td>
<td align="center">
<code class="constant">CL_RG, CL_FLOAT</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_G16R16F</td>
<td align="center">
<code class="constant">CL_RG, CL_HALF_FLOAT</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_G16R16</td>
<td align="center">
<code class="constant">CL_RG, CL_UNORM_INT16</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A8L8</td>
<td align="center">
<code class="constant">CL_RG, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A32B32G32R32F</td>
<td align="center">
<code class="constant">CL_RGBA, CL_FLOAT</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A16B16G16R16F</td>
<td align="center">
<code class="constant">CL_RGBA, CL_HALF_FLOAT</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A16B16G16R16</td>
<td align="center">
<code class="constant">CL_RGBA, CL_UNORM_INT16</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A8B8G8R8</td>
<td align="center">
<code class="constant">CL_RGBA, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_X8B8G8R8</td>
<td align="center">
<code class="constant">CL_RGBA, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_A8R8G8B8</td>
<td align="center">
<code class="constant">CL_BGRA, CL_UNORM_INT8</code>
</td>
</tr>
<tr>
<td align="center">D3DFMT_X8R8G8B8</td>
<td align="center">
<code class="constant">CL_BGRA, CL_UNORM_INT8</code>
</td>
</tr>
</tbody>
</table>
</div>
<p>
Note that D3D9 format names seem to imply that the order of the color channels are switched
relative to OpenCL but this is not the case. For example, layout of channels for each pixel
for <code class="constant">D3DFMT_A32FB32FG32FR32F</code> is the same as
<code class="constant">CL_RGBA</code>, <code class="constant">CL_FLOAT</code>.
</p>
<p>
Properties of media surface 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_DX9_MEDIA_ADAPTER_TYPE_KHR</code>,
<code class="constant">CL_MEM_DX9_MEDIA_SURFACE_INFO_KHR</code> and
<code class="constant">CL_IMAGE_DX9_MEDIA_SURFACE_PLANE_KHR</code>.
</p>
</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#namedest=cl_khr_dx9_media_sharing" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="EXTENSION.html"><span class="citerefentry"><span class="refentrytitle">EXTENSION</span></span></a>,
<a class="citerefentry" href="clGetPlatformInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformInfo</span></span></a>,
<a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</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
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