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    <title>cl_khr_gl_sharing</title>
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        <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>
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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
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