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| <title>get_image_channel_order</title> |
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| <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"> |
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| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
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| <strong class="fsfunc"> |
| get_image_channel_order |
| </strong> |
| (</code> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image1d_t</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var> |
| <code>)</code></td> |
| </td> |
| </tr> |
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| <strong class="fsfunc"> |
| get_image_channel_order |
| </strong> |
| (</code> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image1d_buffer_t</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var> |
| <code>)</code></td> |
| </td> |
| </tr> |
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| get_image_channel_order |
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| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var> |
| <code>)</code></td> |
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| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="scalarDataTypes.html" target="pagedisplay">int</a> |
| <strong class="fsfunc"> |
| get_image_channel_order |
| </strong> |
| (</code> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image3d_t</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var> |
| <code>)</code></td> |
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| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
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| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
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| <strong class="fsfunc"> |
| get_image_channel_order |
| </strong> |
| (</code> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image1d_array_t</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var> |
| <code>)</code></td> |
| </td> |
| </tr> |
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| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
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| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="scalarDataTypes.html" target="pagedisplay">int</a> |
| <strong class="fsfunc"> |
| get_image_channel_order |
| </strong> |
| (</code> |
| <td> |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a> |
| <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_Rx<br /> |
| CLK_RG<br /> |
| CLK_RGx<br /> |
| CLK_RA<br /> |
| CLK_RGB<br /> |
| CLK_RGBx<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 values returned by <code class="function">get_image_channel_order</code> |
| as shown above with the <code class="constant">CLK_</code> prefixes correspond |
| to the <code class="constant">CL_</code> prefixes used to describe the image |
| channel order and data type in the table of supported names and values in |
| <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a> |
| and list of supported Image Channel Order Values for |
| <a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>. For |
| example, both <code class="constant">CL_UNORM_INT8</code> and <code class="constant">CLK_UNORM_INT8</code> |
| refer to an image channel data type that is an unnormalized unsigned 8-bit integer. |
| </p> |
| <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 uint4 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 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"><span class="type">float4</span>, <span class="type">int4</span> or <span class="type">unsigned int4</span> components of channel data</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="center"><code class="constant">CL_R</code>, <code class="constant">CL_Rx</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>, <code class="constant">CL_RGx</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>, <code class="constant">CL_RGBx</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> |
| <p> |
| A kernel that uses a sampler with the <code class="constant">CL_ADDRESS_CLAMP</code> addressing |
| mode with multiple images may result in additional samplers being used internally by an |
| implementation. If the same sampler is used with multiple images called via <a class="citerefentry" href="read_imagef2d.html"><span class="citerefentry"><span class="refentrytitle">read_image{f|i|ui}</span></span></a>, |
| then it is possible that an implementation may need to allocate an additional |
| sampler to handle the different border color values that may be needed depending |
| on the image formats being used. These implementation allocated samplers |
| will count against the maximum sampler values supported by the device and |
| given by <code class="constant">CL_DEVICE_MAX_SAMPLERS</code>. Enqueuing a kernel that |
| requires more samplers than the implementation can support will result in a |
| <code class="constant">CL_OUT_OF_RESOURCES</code> error being returned. |
| </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=292" 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 © 2007-2011 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 |
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