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    <title>cl_image_desc</title>
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    <div class="refentry">
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        <a xmlns="http://www.w3.org/1999/xhtml" id="cl_image_desc"></a>
        <h1>cl_image_desc</h1>
        <p>
            The image descriptor structure describes the type and dimensions of the image or image array and is defined as:
        </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>
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              <tr>
                <td align="left">typedef struct _cl_image_desc {
          <a class="link" href="enums.html#cl_mem_object_type" target="pagedisplay">cl_mem_object_type</a> image_type;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> image_width;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> image_height;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> image_depth;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> image_array_size;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> image_row_pitch;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> image_slice_pitch;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> num_mip_levels;
          <a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> num_samples;
          <a class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a> buffer;
} cl_image_desc;</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="parameters"></a>
        <h2>Members</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">image_type</span>
            </dt>
            <dd>
              <p>
                      Describes the image type and must be either
                      <code class="constant">CL_MEM_OBJECT_IMAGE1D</code>,
                      <code class="constant">CL_MEM_OBJECT_IMAGE1D_BUFFER</code>,
                      <code class="constant">CL_MEM_OBJECT_IMAGE1D_ARRAY</code>,
                      <code class="constant">CL_MEM_OBJECT_IMAGE2D</code>,
                      <code class="constant">CL_MEM_OBJECT_IMAGE2D_ARRAY</code>, or
                      <code class="constant">CL_MEM_OBJECT_IMAGE3D</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">image_width</span>
            </dt>
            <dd>
              <p>
                      The width of the image in pixels. For a 2D image and image array, the image 
                        width must be a value &gt;= 1 and ≤ <code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>. For a 3D image, the 
                        image width must be a value ≥ 1 and ≤ <code class="constant">CL_DEVICE_IMAGE3D_MAX_WIDTH</code>. For a 1D 
                        image buffer, the image width must be a value ≥ 1 and ≤  
                        <code class="constant">CL_DEVICE_IMAGE_MAX_BUFFER_SIZE</code>. For a 1D image and 1D image array, the image 
                        width must be a value ≥ 1 and ≤ <code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">image_height</span>
            </dt>
            <dd>
              <p>
                      The height of the image in pixels. This is 
                      only used if the image is a 2D or 3D image, or a
                      2D image array. For a 2D image or image array, 
                      the image height must be a value ≥ 1 and ≤ 
                      <code class="constant">CL_DEVICE_IMAGE2D_MAX_HEIGHT</code>. 
                      For a 3D image, the image height must be a value ≥ 1 
                      and ≤ <code class="constant">CL_DEVICE_IMAGE3D_MAX_HEIGHT</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">image_depth</span>
            </dt>
            <dd>
              <p>
                      The depth of the image in pixels. This is only used if the
                      image is a 3D image and must be a value ≥ 1 and ≤
                      <code class="constant">CL_DEVICE_IMAGE3D_MAX_DEPTH</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">image_array_size</span>
            </dt>
            <dd>
              <p>
                      The number of images in the image array. This is only
                      used if the image is a 1D or 2D image array. The values for
                      <code class="varname">image_array_size</code>, if specified, must be a value ≥
                      1 and ≤ <code class="constant">CL_DEVICE_IMAGE_MAX_ARRAY_SIZE</code>.
                    </p>
              <p>
                      Note that reading and writing 2D image arrays from a kernel with
                      <code class="varname">image_array_size</code> = 1 may be lower performance than
                      2D images.
                    </p>
            </dd>
            <dt>
              <span class="term">image_row_pitch</span>
            </dt>
            <dd>
              <p>
                      The scan-line pitch in bytes. This must be 0 if <code class="varname">host_ptr</code>
                      is NULL and can be either 0 or ≥ <code class="varname">image_width</code> * size of element in bytes if
                      <code class="varname">host_ptr</code> is not NULL. If <code class="varname">host_ptr</code>
                      is not NULL and <code class="varname">image_row_pitch</code> =
                      0, <code class="varname">image_row_pitch</code> is calculated as
                      <code class="varname">image_width</code> * size of element in bytes. If
                      <code class="varname">image_row_pitch</code> is not 0, it must be a multiple of
                      the image element size in bytes. For a 2D image created from a buffer, the pitch 
specified (or computed if pitch specified is 0) must be a multiple of the maximum of the 
<code class="constant">CL_DEVICE_IMAGE_PITCH_ALIGNMENT</code> value for all devices in the context associated with 
<code class="code">image_desc-&gt;mem_object</code> and that support images.
                    </p>
            </dd>
            <dt>
              <span class="term">image_slice_pitch</span>
            </dt>
            <dd>
              <p>
                      The size in bytes of each 2D slice in the 3D image or the size in
                      bytes of each image in a 1D or 2D image array. This must be 0 if
                      <code class="varname">host_ptr</code> is NULL. If <code class="varname">host_ptr</code>
                      is not NULL, <code class="varname">image_slice_pitch</code> can
                      be either 0 or ≥ <code class="varname">image_row_pitch</code> *
                      <code class="varname">image_height</code> for a 2D image array or 3D image
                      and can be either 0 or ≥ <code class="varname">image_row_pitch</code>
                      for a 1D image array. If <code class="varname">host_ptr</code>
                      is not NULL and <code class="varname">image_slice_pitch</code> =
                      0, <code class="varname">image_slice_pitch</code> is calculated as
                      <code class="varname">image_row_pitch</code> * <code class="varname">image_height</code>
                      for a 2D image array or 3D image and <code class="varname">image_row_pitch</code>
                      for a 1D image array. If <code class="varname">image_slice_pitch</code> is not 0,
                      it must be a multiple of the <code class="varname">image_row_pitch</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">num_mip_level, </span>
              <span class="term">num_samples</span>
            </dt>
            <dd>
              <p>
                      Must be 0.
                    </p>
            </dd>
            <dt>
              <span class="term">mem_object</span>
            </dt>
            <dd>
              <p>
                      Refers to a valid buffer or image memory object. <code class="varname">mem_object</code> can be a buffer 
                        memory object if image_type is <code class="constant">CL_MEM_OBJECT_IMAGE1D_BUFFER</code> or
                        <code class="constant">CL_MEM_OBJECT_IMAGE2D</code>
                        (To create a 2D image from a buffer object that share the data store between the image and buffer object)
                        . <code class="varname">mem_object</code> can be a image object if <code class="varname">image_type</code> is 
                        <code class="constant">CL_MEM_OBJECT_IMAGE2D</code>
                        (To create an image object from another image object that share the data store between these image objects). 
                        Otherwise it must be NULL. The image pixels are taken from 
                        the memory object’s data store. When the contents of the specified memory object’s data store 
                        are modified, those changes are reflected in the contents of the image object and vice-versa at 
                        corresponding sychronization points. For a 1D image buffer object, the <code class="varname">image_width</code> * size 
                        of element in bytes must be ≤ size of buffer object data store. For a 2D image created from a 
                        buffer, the <code class="varname">image_row_pitch * image_height</code> must be ≤ size of buffer object data 
                        store. For an image object created from another image object, the values specified in the image 
                        descriptor except for <code class="varname">mem_object</code> must match the image descriptor information associated 
                        with <code class="varname">mem_object</code>.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="note"></a>
        <h2>Note</h2>
        <p>
          Concurrent reading from, writing to and copying between both a buffer object and 1D image
          buffer or 2D image object associated with the buffer object is undefined. Only reading from both
          a buffer object and 1D image buffer or 2D image object associated with the buffer object is defined.
        </p>
        <p>
            Writing to an image created from a buffer and then reading from this buffer in a kernel even if 
            appropriate synchronization operations (such as a barrier) are performed between the writes and
            reads is undefined. Similarly, writing to the buffer and reading from the image created from this 
            buffer with appropriate synchronization between the writes and reads is undefined.
        </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.pdf#namedest=cl_image_desc" 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_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</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
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