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    <title>clCreateSampler</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="clCreateSampler"></a>
        <h1>     
            clCreateSampler
        </h1>
        <p>          
            Creates a sampler object.
        </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">              
                    cl_sampler <strong class="fsfunc">clCreateSampler</strong>
                (</code>
                <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">cl_context</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">context</var>, </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_bool" target="_top">cl_bool</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">normalized_coords</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_addressing_mode" target="_top">cl_addressing_mode</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">addressing_mode</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_filter_mode" target="_top">cl_filter_mode</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">filter_mode</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">cl_int</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*errcode_ret</var><code>)</code></td>
            </tr>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="parameters"></a>
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                    <code class="varname"> 
                        context
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
                        Must be a valid OpenCL context.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                      normalized_coords
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
                        Determines if the image coordinates specified are normalized (if
<code class="varname">normalized_coords</code> is <code class="constant">CL_TRUE</code>) or not (if <code class="varname">normalized_coords</code> is <code class="constant">CL_FALSE</code>).
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                        addressing_mode
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
                        Specifies how out-of-range image coordinates are handled when reading from
an image. This can be set to <code class="constant">CL_ADDRESS_REPEAT</code>, <code class="constant">CL_ADDRESS_CLAMP_TO_EDGE</code>, <code class="constant">CL_ADDRESS_CLAMP</code>, and <code class="constant">CL_ADDRESS_NONE</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                        filtering_mode
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
                        Specifies the type of filter that must be applied when reading an image. This can be <code class="constant">CL_FILTER_NEAREST</code> or <code class="constant">CL_FILTER_LINEAR</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                        errcode_ret
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
                        Returns an appropriate error code. If <code class="varname">errcode_ret</code> is NULL, no error code is returned.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
            A sampler object describes how to sample an image when the image is read in the kernel. The built-in functions to read from an image in a kernel take a sampler as an argument. The sampler arguments to the image read function can be sampler objects created using OpenCL functions and passed as argument values to the kernel or can be samplers declared inside a kernel. In this section we discuss how sampler objects are created using OpenCL functions.

        </p>
      </div>
      <div class="refsect1">
        <a id="errors"></a>
        <h2>Errors</h2>
        <p>
            Returns a valid non-zero sampler object and <code class="varname">errcode_ret</code> is set to <span class="errorname">CL_SUCCESS</span> if the sampler object is created successfully. Otherwise, it returns a NULL value with one of the following error values returned in <code class="varname">errcode_ret</code>:
        </p>
        <div class="itemizedlist">
          <ul class="itemizedlist" style="list-style-type: disc; ">
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if <code class="varname">context</code>
                is not a valid context.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">addressing_mode</code>, 
				<code class="varname">filter_mode</code>, or <code class="varname">normalized_coords</code> or a  combination of these argument values are not valid.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_OPERATION</span> if images are not supported by any device associated with <code class="varname">context</code> (i.e. <span class="errorname">CL_DEVICE_IMAGE_SUPPORT</span> specified in the table of OpenCL Device Queries for <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a> is <span class="errorname">CL_FALSE</span>). 
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to allocate resources required by the OpenCL implementation on the host.
            </li>
          </ul>
        </div>
      </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=85" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
<a class="citerefentry" href="clRetainSampler.html"><span class="citerefentry"><span class="refentrytitle">clRetainSampler</span></span></a>,  <a class="citerefentry" href="clReleaseSampler.html"><span class="citerefentry"><span class="refentrytitle">clReleaseSampler</span></span></a>,  <a class="citerefentry" href="clGetSamplerInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetSamplerInfo</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
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in all copies or substantial portions of the Materials. 
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