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    <title>cl_image_format</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="cl_image_format"></a>
        <h1>cl_image_format</h1>
        <p>The image format descriptor structure is defined as: </p>
      </div>
      <div class="refsect2">
        <a id="synopsis"></a>
        <h3></h3>
        <div class="informaltable">
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                <td align="left">typedef struct _cl_image_format {
          <a class="link" href="enums.html#cl_channel_order" target="pagedisplay">cl_channel_order</a> image_channel_order;
          <a class="link" href="enums.html#cl_channel_type" target="pagedisplay">cl_channel_type</a>  image_channel_data_type;
} cl_image_format;</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_channel_order</span>
            </dt>
            <dd>
            Specifies the number of channels and the channel layout i.e. the
memory layout in which channels are stored in the image. Valid values are described in the table below.

          <div class="informaltable"><table border="1"><colgroup><col align="left" class="col1" /><col align="left" class="col2" /></colgroup><thead><tr><th align="left">Format</th><th align="left">Description</th></tr></thead><tbody><tr><td align="left">CL_R, CL_Rx, or CL_A</td><td align="left"> </td></tr><tr><td align="left">CL_INTENSITY</td><td align="left">This format can only be used if channel data type = CL_UNORM_INT8,
            CL_UNORM_INT16, CL_SNORM_INT8, CL_SNORM_INT16, CL_HALF_FLOAT, or CL_FLOAT.
                  </td></tr><tr><td align="left">CL_LUMINANCE</td><td align="left">This format can only be used if channel data type = CL_UNORM_INT8,
            CL_UNORM_INT16, CL_SNORM_INT8, CL_SNORM_INT16, CL_HALF_FLOAT, or CL_FLOAT.
                  </td></tr><tr><td align="left">CL_RG, CL_RGx, or CL_RA</td><td align="left"> </td></tr><tr><td align="left">CL_RGB or CL_RGBx</td><td align="left">This format can only be used if channel data type = CL_UNORM_SHORT_565,
            CL_UNORM_SHORT_555 or CL_UNORM_INT_101010.</td></tr><tr><td align="left">CL_RGBA</td><td align="left"> </td></tr><tr><td align="left">CL_ARGB, CL_BGRA.</td><td align="left">This format can only be used if channel data type = CL_UNORM_INT8,
            CL_SNORM_INT8, CL_SIGNED_INT8 or CL_UNSIGNED_INT8.</td></tr></tbody></table></div><p>
          </p></dd>
            <dt>
              <span class="term">image_channel_data_type</span>
            </dt>
            <dd>
           Describes the size of the channel data type. The number of bits per element determined by the
                <code class="constant">image_channel_data_type</code> and <code class="constant">image_channel_order</code>
                must be a power of two. The list of supported values is described in the table below.

           <div class="informaltable"><table border="1"><colgroup><col align="left" class="col1" /><col align="left" class="col2" /></colgroup><thead><tr><th align="left">Image Channel Data Type</th><th align="left">Description</th></tr></thead><tbody><tr><td align="left">CL_SNORM_INT8</td><td align="left">Each channel component is a normalized signed 8-bit integer value.</td></tr><tr><td align="left">CL_SNORM_INT16</td><td align="left">Each channel component is a normalized signed 16-bit integer value.</td></tr><tr><td align="left">CL_UNORM_INT8</td><td align="left">Each channel component is a normalized unsigned 8-bit integer value.</td></tr><tr><td align="left">CL_UNORM_INT16</td><td align="left">Each channel component is a normalized unsigned 16-bit integer value.</td></tr><tr><td align="left">CL_UNORM_SHORT_565</td><td align="left">Represents a normalized 5-6-5 3-channel RGB image. The channel order must be CL_RGB or CL_RGBx.</td></tr><tr><td align="left">CL_UNORM_SHORT_555</td><td align="left">Represents a normalized x-5-5-5 4-channel xRGB image.
                            The channel order must be CL_RGB or CL_RGBx.</td></tr><tr><td align="left">CL_UNORM_INT_101010</td><td align="left">Represents a normalized x-10-10-10 4-channel xRGB image.
                           The channel order must be CL_RGB or CL_RGBx.</td></tr><tr><td align="left">CL_SIGNED_INT8</td><td align="left">Each channel component is an unnormalized signed 8-bit integer value.</td></tr><tr><td align="left">CL_SIGNED_INT16</td><td align="left">Each channel component is an unnormalized signed 16-bit integer value.</td></tr><tr><td align="left">CL_SIGNED_INT32</td><td align="left">Each channel component is an unnormalized signed 32-bit integer value.</td></tr><tr><td align="left">CL_UNSIGNED_INT8</td><td align="left">Each channel component is an unnormalized unsigned 8-bit integer value.</td></tr><tr><td align="left">CL_UNSIGNED_INT16</td><td align="left">Each channel component is an unnormalized unsigned 16-bit integer value.</td></tr><tr><td align="left">CL_UNSIGNED_INT32</td><td align="left">Each channel component is an unnormalized unsigned 32-bit integer value.</td></tr><tr><td align="left">CL_HALF_FLOAT</td><td align="left">Each channel component is a 16-bit half-float value.</td></tr><tr><td align="left">CL_FLOAT</td><td align="left">Each channel component is a single precision floating-point value.</td></tr></tbody></table></div><p>
         </p></dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
            For example, to specify a normalized unsigned 8-bit / channel RGBA image:
        </p>
        <p>
</p>
        <div class="literallayout">
          <p>          <code class="code">image_channel_order</code> = <code class="constant">CL_RGBA</code><br />
          <code class="code">image_channel_data_type</code> = <code class="constant">CL_UNORM_INT8</code><br />
</p>
        </div>
        <p>
        </p>
        <p>
          <code class="varname">image_channel_data_type</code> values of
          <code class="constant">CL_UNORM_SHORT_565</code>, <code class="constant">CL_UNORM_SHORT_555</code>
          and <code class="constant">CL_UNORM_INT_101010</code> are special cases of packed image
          formats where the channels of each element are packed into a single unsigned
          short or unsigned int. For these special packed image formats, the channels
          are normally packed with the first channel in the most significant bits of
          the bitfield, and successive channels occupying progressively less significant
          locations. For <code class="constant">CL_UNORM_SHORT_565</code>, R is in bits 15:11, G is
          in bits 10:5 and B is in bits 4:0. For <code class="constant">CL_UNORM_SHORT_555</code>,
          bit 15 is undefined, R is in bits 14:10, G in bits 9:5 and B in bits 4:0. For
          <code class="constant">CL_UNORM_INT_101010</code>, bits 31:30 are undefined, R is in bits 29:20,
          G in bits 19:10 and B in bits 9:0.
        </p>
        <p>
          OpenCL implementations must maintain the minimum precision specified by the number
          of bits in <code class="code">image_channel_data_type</code>. If the image format specified
          by <code class="code">image_channel_order</code>, and <code class="code">image_channel_data_type</code>
          cannot be supported by the OpenCL implementation, then the call to
          <a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a> will return
          a NULL memory object.
        </p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />
                              
            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf#page=92" 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_desc.html"><span class="citerefentry"><span class="refentrytitle">cl_image_desc</span></span></a>,
            <a class="citerefentry" href="EXTENSION.html"><span class="citerefentry"><span class="refentrytitle">EXTENSION</span></span></a>,
            <a class="citerefentry" href="clGetSupportedImageFormats.html"><span class="citerefentry"><span class="refentrytitle">clGetSupportedImageFormats</span></span></a>,
            <a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</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 © 2007-2011 The Khronos Group Inc.
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