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| <title>clCreateSamplerWithProperties</title> |
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| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clCreateSamplerWithProperties"></a> |
| <h1> |
| clCreateSamplerWithProperties |
| </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"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="abstractDataTypes.html" target="pagedisplay">cl_sampler</a> <strong class="fsfunc">clCreateSamplerWithProperties</strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_context</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">context</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_sampler_properties" target="pagedisplay">cl_sampler_properties</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*sampler_properties</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">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">sampler_properties</code> </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies a list of sampler property names and |
| their corresponding values. |
| Each sampler property name is immediately followed |
| by the corresponding desired value. The |
| list is terminated with 0. The list of supported |
| properties is described in the table below. If a |
| supported property and its value is not specified in |
| <code class="varname">sampler_properties</code>, its default value will be |
| used. <code class="varname">sampler_properties</code> can be |
| NULL in which case the default values for supported sampler |
| properties will be used. |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| <col align="left" class="col3" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_sampler_properties enum</th> |
| <th align="left">Property Value</th> |
| <th align="left">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_SAMPLER_NORMALIZED_COORDS</code> |
| </td> |
| <td align="left"> |
| <span class="type">cl_bool</span> |
| </td> |
| <td align="left"> |
| <p> |
| A boolean value that specifies |
| whether the image coordinates |
| specified are normalized or not. |
| </p> |
| |
| <p> |
| The default value (i.e. the value used |
| if this property is not specified in |
| <code class="varname">sampler_properties</code>) is <code class="constant">CL_TRUE</code>. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_SAMPLER_ADDRESSING_MODE</code> |
| </td> |
| <td align="left"> |
| <span class="type">cl_addressing_mode</span> |
| </td> |
| <td align="left"> |
| <p> |
| Specifies how out-of-range image |
| coordinates are handled when reading |
| from an image. |
| </p> |
| |
| <p> |
| Valid values are: |
| </p> |
| |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><code class="constant">CL_ADDRESS_MIRRORED_REPEAT</code></li><li class="listitem"><code class="constant">CL_ADDRESS_REPEAT</code></li><li class="listitem"><code class="constant">CL_ADDRESS_CLAMP_TO_EDGE</code></li><li class="listitem"><code class="constant">CL_ADDRESS_CLAMP</code></li><li class="listitem"><code class="constant">CL_ADDRESS_NONE</code></li></ul></div> |
| |
| <p> |
| The default is <code class="constant">CL_ADDRESS_CLAMP</code>. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_SAMPLER_FILTER_MODE</code> |
| </td> |
| <td align="left"> |
| <span class="type">cl_filter_mode</span> |
| </td> |
| <td align="left"> |
| <p> |
| Specifies the type of filter that must |
| be applied when reading an image. |
| Valid values are: |
| </p> |
| |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><code class="constant">CL_FILTER_NEAREST</code></li><li class="listitem"><code class="constant">CL_FILTER_LINEAR</code></li></ul></div> |
| |
| <p> |
| The default is <code class="constant">CL_FILTER_NEAREST</code>. |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <p> |
| If the <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</span></span></a> |
| extension is supported, the following sampler |
| properties can be specified when a sampler object is |
| created using <code class="function">clCreateSamplerWithProperties</code>: |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| <col align="left" class="col3" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_sampler_properties enum</th> |
| <th align="left">Property Value</th> |
| <th align="left">Default Value</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_SAMPLER_MIP_FILTER_MODE_KHR</code> |
| </td> |
| <td align="left"> |
| <span class="type">cl_filter_mode</span> |
| </td> |
| <td align="left"> |
| <code class="constant">CL_FILTER_NEAREST_KHR</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_SAMPLER_LOD_MIN_KHR</code> |
| </td> |
| <td align="left"> |
| <span class="type">cl_float</span> |
| </td> |
| <td align="left"> |
| <code class="constant">0.0f</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_SAMPLER_LOD_MAX_KHR</code> |
| </td> |
| <td align="left"> |
| <span class="type">cl_float</span> |
| </td> |
| <td align="left"> |
| <code class="constant">MAXFLOAT</code> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <p> |
| If the <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</span></span></a> |
| extension is supported, |
| The sampler properties |
| <code class="constant">CL_SAMPLER_MIP_FILTER_MODE_KHR</code>, |
| <code class="constant">CL_SAMPLER_LOD_MIN_KHR</code> and |
| <code class="constant">CL_SAMPLER_LOD_MAX_KHR</code> cannot be specified with |
| any samplers initialized in the OpenCL program |
| source. Only the default values for these |
| properties will be used. To create a sampler |
| with specific values for these properties, a sampler |
| object must be created with |
| <code class="function">clCreateSamplerWithProperties</code> |
| and passed as an argument to a kernel. |
| </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. |
| </p> |
| <p> |
| For more information about working with samplers, see |
| <a class="citerefentry" href="sampler_t.html"><span class="citerefentry"><span class="refentrytitle">sampler_t</span></span></a> |
| </p> |
| <p> |
| If the <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</span></span></a> |
| extension is supported, the sampler properties |
| <code class="constant">CL_SAMPLER_MIP_FILTER_MODE_KHR</code>, |
| <code class="constant">CL_SAMPLER_LOD_MIN_KHR</code> and |
| <code class="constant">CL_SAMPLER_LOD_MAX_KHR</code> cannot be |
| specified with any samplers initialized in the OpenCL |
| program source. Only the default values for these |
| properties will be used. To create a sampler |
| with specific values for these properties, a |
| sampler object must be created with |
| <code class="function">clCreateSamplerWithProperties</code> |
| and passed as an argument to a kernel. |
| </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 the property |
| name in <code class="varname">sampler_properties</code> is not a supported |
| property name, if the value specified for a supported property |
| name is not valid, or if the |
| same property name is specified more than once. |
| </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. <code class="constant">CL_DEVICE_IMAGE_SUPPORT</code> |
| 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_RESOURCES</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the device. |
| </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="https://www.khronos.org/registry/cl/specs/opencl-2.1.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="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> |
| <a class="citerefentry" href="sampler_t.html"><span class="citerefentry"><span class="refentrytitle">sampler_t</span></span></a>, |
| <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</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 |
| permit persons to whom the Materials are furnished to do so, subject to |
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