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<title>get_image_channel_order</title>
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<div class="refentry">
<a id="idm1"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="get_image_channel_order"></a>
<h1>get_image_channel_order</h1>
<p>
Return the image channel data order.
</p>
</div>
<div class="refsynopsisdiv">
<h2></h2>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="scalarDataTypes.html" target="_top">int</a>
<strong class="fsfunc">
get_image_channel_order
</strong>
(</code>
<td>image2d_t <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var><code>)</code></td>
</td>
</tr>
</table>
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<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="scalarDataTypes.html" target="_top">int</a>
<strong class="fsfunc">
get_image_channel_order
</strong>
(</code>
<td>image3d_t <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var><code>)</code></td>
</td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
Return the image channel order. Valid values are:</p>
<div class="literallayout">
<p><br />
CLK_A<br />
CLK_R<br />
CLK_RG<br />
CLK_RA<br />
CLK_RGB<br />
CLK_RGBA<br />
CLK_ARGB<br />
CLK_BGRA<br />
CLK_INTENSITY<br />
CLK_LUMINANCE</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
The following table describes the mapping of the number of channels of an image element to the appropriate components in the float4, int4 or unsigned int4 vector data type for the color values returned by <code class="function">read_image{f|i|ui}</code> or supplied to <code class="function">write_image{f|i|ui}</code>. The unmapped components will be set to <code class="constant">0.0</code> for red, green and blue channels and will be set to <code class="constant">1.0</code> for the alpha channel.
</p>
<p>
</p>
<div class="informaltable">
<table class="informaltable" border="1">
<colgroup>
<col align="center" class="col1" />
<col align="center" class="col2" />
</colgroup>
<thead>
<tr>
<th align="center">Channel Order</th>
<th align="center">float4, int4 or unsigned int4 components of channel data</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center">
<code class="constant">CL_R</code>
</td>
<td align="center">
<code class="constant">(r, 0.0, 0.0, 1.0)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_A</code>
</td>
<td align="center">
<code class="constant">(0.0, 0.0, 0.0, a)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_RG</code>
</td>
<td align="center">
<code class="constant">(r, g, 0.0, 1.0)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_RA</code>
</td>
<td align="center">
<code class="constant">(r, 0.0, 0.0, a)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_RGB</code>
</td>
<td align="center">
<code class="constant">(r, g, b, 1.0)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_RGBA, CL_BGRA, CL_ARGB</code>
</td>
<td align="center">
<code class="constant">(r, g, b, a)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_INTENSITY</code>
</td>
<td align="center">
<code class="constant">(I, I, I, I)</code>
</td>
</tr>
<tr>
<td align="center">
<code class="constant">CL_LUMINANCE</code>
</td>
<td align="center">
<code class="constant">(L, L, L, 1.0)</code>
</td>
</tr>
</tbody>
</table>
</div>
<p>
</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-1.0.pdf#page=190" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="imageFunctions.html"><span class="citerefentry"><span class="refentrytitle">Image Functions</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 © 2007-2009 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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