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| <title>clCreateFromDX9MediaSurfaceKHR</title> |
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| <body> |
| <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="clCreateFromDX9MediaSurfaceKHR"></a> |
| <h1>clCreateFromDX9MediaSurfaceKHR</h1> |
| <p>Creates an OpenCL image object from a media surface.</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="abstractDataTypes.html" target="pagedisplay">cl_mem</a> |
| <strong class="fsfunc">clCreateFromDX9MediaSurfaceKHR</strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_context</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">context</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_mem_flags" target="pagedisplay">cl_mem_flags</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">flags</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>cl_dx9_media_adapter_type_khr <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">adapter_type</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">*surface_info</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">plane</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_int</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*errcode_ret</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">context</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A valid OpenCL context created from a media adapter. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">flags</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A bit-field that is used to specify usage information. Refer |
| to the table of allowed values for <code class="varname">flags</code> for |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>. Only |
| <code class="constant">CL_MEM_READ_ONLY</code>, <code class="constant">CL_MEM_WRITE_ONLY</code>, |
| and <code class="constant">CL_MEM_READ_WRITE</code> values specified |
| in the table of allowed values for <code class="varname">flags</code> for |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a> |
| can be used. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">adapter_type</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A value from enumeration of supported adapters described in the |
| table of <code class="varname">cl_dx9_media_adapter_type_khr</code> values for |
| <a class="citerefentry" href="clGetDeviceIDsFromDX9MediaAdapterKHR.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceIDsFromDX9MediaAdapterKHR</span></span></a>. |
| The type of <code class="varname">surface_info</code> is determined by the adapter |
| type. The implementation does not need to support all adapter types. This |
| approach provides flexibility to support additional adapter types in the |
| future. Supported adapter types are <code class="constant">CL_ADAPTER_D3D9_KHR</code>, |
| <code class="constant">CL_ADAPTER_D3D9EX_KHR</code>, and |
| <code class="constant">CL_ADAPTER_DXVA_KHR</code>. |
| </p> |
| <p> |
| If <code class="varname">adapter_type</code> is <code class="constant">CL_ADAPTER_D3D9_KHR</code>, |
| <code class="constant">CL_ADAPTER_D3D9EX_KHR</code>, or |
| <code class="constant">CL_ADAPTER_DXVA_KHR</code>, the <code class="varname">surface_info</code> |
| points to the following structure: |
| </p> |
| <p> <code class="code"><div class="literallayout"><p><br /> |
| typedef struct _cl_dx9_surface_info_khr<br /> |
| {<br /> |
| IDirect3DSurface9 *resource; <br /> |
| HANDLE shared_handle;<br /> |
| } cl_dx9_surface_info_khr;<br /> |
| </p></div></code> |
| </p> |
| <p> |
| For D3D9 surfaces, we need both the handle to the resource and the resource |
| itself to have a sufficient amount of information to eliminate a copy of the |
| surface for sharing in cases where this is possible. Elimination of the copy |
| is driver dependent. <code class="varname">shared_handle</code> may be NULL and this |
| may result in sub-optimal performance. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">surface_info</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A pointer to one of the structures defined in the <code class="varname">adapter_type</code> |
| description above passed in as a <span class="type">void</span> *. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">plane</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| The plane of resource to share for planar surface formats. For planar formats, |
| we use the plane parameter to obtain a handle to thie specific plane (Y, U or |
| V for example). For nonplanar formats used by media, <code class="varname">plane</code> |
| must be 0. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">errcode_ret</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| An appropriate error code. If <code class="varname">errcode_ret</code> is NULL, no |
| error code is returned. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| The width and height of the returned OpenCL 2D image object are determined by the |
| width and height of the plane of resource. The channel type and order of the returned |
| image object is determined by the format and plane of resource and are described in |
| tables 9.10.3 and 9.10.4. |
| </p> |
| <p> |
| This call will increment the internal media surface count on |
| <code class="varname">resource</code>. The internal media surface reference count on |
| <code class="varname">resource</code> will be decremented when the OpenCL reference count on |
| the returned OpenCL memory object drops to zero. |
| </p> |
| <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-1.6.8"></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="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| Returns a valid non-zero 2D image object and |
| <code class="varname">errcode_ret</code> is set to <span class="errorname">CL_SUCCESS</span> if the 2D |
| image object is created successfully. Otherwise, it returns a NULL value with one |
| of the following error values returned in <code class="varname">errcode_ret</code>: |
| </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_CONTEXT</span> if <code class="varname">context</code> is not |
| a valid context. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if values specified in |
| <code class="varname">flags</code> are not valid or if |
| <code class="varname">plane</code> is not a valid plane of |
| <code class="varname">resource</code> specified in <code class="varname">surface_info</code>. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_DX9_MEDIA_SURFACE_KHR</span> if |
| <code class="varname">resource</code> specified in <code class="varname">surface_info</code> is not |
| a valid resource or is not associated with <code class="varname">adapter_type</code> (e.g., |
| <code class="varname">adapter_type</code> is set to <code class="constant">CL_ADAPTER_D3D9_KHR</code> |
| and <code class="varname">resource</code> is not a Direct3D 9 surface created in |
| <code class="constant">D3DPOOL_DEFAULT</code>). |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_DX9_MEDIA_SURFACE_KHR</span> if |
| <code class="varname">shared_handle</code> specified in <code class="varname">surface_info</code> |
| is not NULL or a valid handle value. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_DX9_MEDIA_SURFACE_KHR</span> if |
| <code class="varname">adapter_type</code> is set to a media |
| adapter and the <code class="varname">surface_info</code> does |
| not reference a media surface of the required type, or if |
| <code class="varname">adapter_type</code> is set to a media |
| adapter type and <code class="varname">surface_info</code> |
| does not contain a valid reference to |
| a media surface on that adapter, by |
| <a class="citerefentry" href="clGetMemObjectInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetMemObjectInfo</span></span></a> |
| when <code class="varname">param_name</code> is a surface or |
| handle when the image was not created from an |
| appropriate media surface, and from |
| <a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</span></span></a> |
| when <code class="varname">param_name</code> is |
| <code class="constant">CL_IMAGE_DX9_MEDIA_PLANE_KHR</code> and image was |
| not created from an appropriate media surface. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_IMAGE_FORMAT_DESCRIPTOR</span> if the texture format |
| of <code class="varname">resource</code> is not listed in tables 9.10.3 and 9.10.4. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_OPERATION</span> if there are no devices in |
| <code class="varname">context</code> that support <code class="varname">adapter_type</code>. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the device. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the host. |
| </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#namedest=clCreateFromDX9MediaSurfaceKHR" 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_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>, |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</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> |
| </div> |
| </body> |
| </html> |
