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| <title>cl_khr_gl_sharing</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="cl_khr_gl_sharing"></a> |
| <h1>cl_khr_gl_sharing</h1> |
| <p> |
| Allow applications to use OpenGL buffer, texture and renderbuffer objects as OpenCL memory objects. |
| </p> |
| </div> |
| <div class="refsect2"> |
| <a id="synopsis"></a> |
| <h3> |
| </h3> |
| <div class="informaltable"> |
| <table border="0"> |
| <colgroup> |
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| <tbody> |
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| <td align="left"> |
| cl_khr_gl_sharing |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| General information about GL sharing follows. |
| </p> |
| <p> |
| The OpenCL specification in section 9.7 defines how to |
| share data with texture and buffer objects in a parallel OpenGL implementation, |
| but does not define how the association between an OpenCL context and an OpenGL |
| context or share group is established. This extension defines optional attributes |
| to OpenCL context creation routines which associate a GL context or share group |
| object with a newly created OpenCL context. If this extension is supported |
| by an implementation, the string "cl_khr_gl_sharing" will be present in the |
| <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 in the <code class="constant">CL_PLATFORM_EXTENSIONS</code> |
| string described in the table of allowed values for <code class="varname">param_name</code> |
| for <a class="citerefentry" href="clGetPlatformInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformInfo</span></span></a>. |
| </p> |
| <p> |
| |
| This section discusses OpenCL functions that allow applications |
| to use OpenGL buffer, texture, and renderbuffer objects as OpenCL memory objects. This |
| allows efficient sharing of data between OpenCL and OpenGL. The OpenCL API may be used |
| to execute kernels that read and/or write memory objects that are also OpenGL objects. |
| </p> |
| <p> |
| An OpenCL image object may be created from an OpenGL texture or |
| renderbuffer object. An OpenCL buffer object may be created from an OpenGL buffer object. |
| </p> |
| <p> |
| Any supported OpenGL object defined within the GL share |
| group object, or the share group associated with the GL context from which the CL |
| context is created, may be shared, with the exception of the default OpenGL objects |
| (i.e. objects named zero), which may not be shared. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| If the |
| <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</span></span></a>, |
| extension is supported by the OpenCL device, the |
| <code class="function">cl_khr_gl_sharing</code> |
| extension adds support for creating a mip-mapped CL image from a |
| mip-mapped GL texture. |
| </p> |
| <p> |
| To create a mip-mapped CL image from a mip-mapped GL texture, the |
| <code class="varname">miplevel</code> argument to |
| <a class="citerefentry" href="clCreateFromGLTexture.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLTexture</span></span></a>, |
| should be a negative value. If |
| <code class="varname">miplevel</code> is a negative value then a CL |
| mipmapped image object is created from a mipmapped |
| GL texture object instead of a CL image |
| object for a specific miplevel of a GL texture. |
| </p> |
| <p> |
| NOTE: For a detailed description of how the level of |
| detail is computed, please refer to section |
| 3.9.7 of the OpenGL 3.0 specification. |
| </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#page=37" 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="clGetGLContextInfoKHR.html"><span class="citerefentry"><span class="refentrytitle">clGetGLContextInfoKHR</span></span></a>, |
| <a class="citerefentry" href="clCreateFromGLBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLBuffer</span></span></a>, |
| <a class="citerefentry" href="clCreateFromGLTexture.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLTexture</span></span></a>, |
| <a class="citerefentry" href="clCreateFromGLRenderbuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLRenderbuffer</span></span></a>, |
| <a class="citerefentry" href="clGetGLObjectInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetGLObjectInfo</span></span></a>, |
| <a class="citerefentry" href="clGetGLTextureInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetGLTextureInfo</span></span></a>, |
| <a class="citerefentry" href="clEnqueueAcquireGLObjects.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueAcquireGLObjects</span></span></a>, |
| <a class="citerefentry" href="clEnqueueReleaseGLObjects.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReleaseGLObjects</span></span></a>, |
| <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</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. |
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