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    <title>cl_khr_gl_depth_images</title>
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    <div class="refentry">
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        <a xmlns="http://www.w3.org/1999/xhtml" id="cl_khr_gl_depth_images"></a>
        <h1>cl_khr_gl_depth_images</h1>
        <p>
            Extends CL/GL sharing to allow a CL image to be created from a GL depth or depth-stencil texture.
        </p>
      </div>
      <div class="refsect2">
        <a id="synopsis"></a>
        <h3>
        </h3>
        <div class="informaltable">
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                <td align="left">
#pragma OPENCL EXTENSION cl_khr_gl_depth_images : enable
                        </td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
            The <code class="function">cl_khr_gl_depth_images</code> extension extends 
            CL / GL sharing
            (i.e. the 
            <a class="citerefentry" href="cl_khr_gl_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_gl_sharing</span></span></a> extension)
            defined in section 9.7 to allow
            a CL depth image to be created from a GL 
            depth or depth-stencil texture. 
            If this extension is supported by an implementation, 
            the string cl_khr_gl_depth_images
            will be present in the 
            <code class="constant">CL_PLATFORM_EXTENSIONS</code> string 
            described in table 4.1 or
            <code class="constant">CL_DEVICE_EXTENSIONS</code> string 
            described in table 4.3.
        </p>
        <p>
            Depth images with an image 
            channel order of <code class="constant">CL_DEPTH_STENCIL</code> can only be created using the
            <a class="citerefentry" href="clCreateFromGLTexture.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLTexture</span></span></a> API.
        </p>
        <p>
            For the image format given by channel order of 
            <code class="constant">CL_DEPTH_STENCIL</code> and channel data type of 
            <code class="constant">CL_UNORM_INT24</code>, the depth is stored as 
            an unsigned normalized 24-bit value. 
        </p>
        <p>
            For the image format given by channel order of 
            <code class="constant">CL DEPTH_STENCIL</code> and channel data type of
            <code class="constant">CL_FLOAT</code>, each pixel is two 
            32-bit values. The depth is stored as a single precision floating
            point value followed by the stencil which is 
            stored as a 8-bit integer value.
        </p>
        <p>
            The stencil value cannot be read or written 
            using the read imagef and write imagef built-in
            functions in an OpenCL kernel. 
        </p>
        <p>
            Depth image objects with an image channel order = 
            <code class="constant">CL_DEPTH_STENCIL</code> cannot be used as 
            arguments to 
            <a class="citerefentry" href="clEnqueueReadImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadImage</span></span></a>, 
            <a class="citerefentry" href="clEnqueueWriteImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteImage</span></span></a>, 
            <a class="citerefentry" href="clEnqueueCopyImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImage</span></span></a>, 
            <a class="citerefentry" href="clEnqueueCopyImageToBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImageToBuffer</span></span></a>, 
            <a class="citerefentry" href="clEnqueueCopyBufferToImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBufferToImage</span></span></a>, 
            <a class="citerefentry" href="clEnqueueMapImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapImage</span></span></a> and 
            <a class="citerefentry" href="clEnqueueFillImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueFillImage</span></span></a> 
            and will return a <span class="errorname">CL_INVALID_OPERATION</span> error.
        </p>
        <p>
            
            The following new image formats are added to table 9.4 in section 9.7.3.1 of the OpenCL 2.1
            extension specification. If a GL texture object with an internal format from table 9.4 is 
            successfully created by OpenGL, then there is guaranteed to be a mapping to one of the 
            corresponding CL image format(s) in that table.
        </p>
        <div class="informaltable">
          <table border="1">
            <colgroup>
              <col align="left" class="col1" />
              <col align="left" class="col2" />
            </colgroup>
            <thead>
              <tr>
                <th align="left">GL internal format</th>
                <th align="left">CL image format
(channel order, channel data type)</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td align="left">
                  <code class="constant">GL_DEPTH_COMPONENT32F</code>
                </td>
                <td align="left">
                  <code class="constant">CL_DEPTH, CL_FLOAT</code>
                </td>
              </tr>
              <tr>
                <td align="left">
                  <code class="constant">GL_DEPTH_COMPONENT16</code>
                </td>
                <td align="left">
                  <code class="constant">CL_DEPTH, CL_UNORM_INT16</code>
                </td>
              </tr>
              <tr>
                <td align="left">
                  <code class="constant">GL_DEPTH24_STENCIL8</code>
                </td>
                <td align="left">
                  <code class="constant">CL_DEPTH_STENCIL, CL_UNORM_INT24</code>
                </td>
              </tr>
              <tr>
                <td align="left">
                  <code class="constant">GL_DEPTH32F_STENCIL8</code>
                </td>
                <td align="left">
                  <code class="constant">CL_DEPTH_STENCIL, CL_FLOAT</code>
                </td>
              </tr>
            </tbody>
          </table>
        </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=111" target="OpenCL Spec">OpenCL Specification</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.
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"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
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