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<title>cl_khr_3d_image_writes</title>
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<div class="refentry">
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<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="cl_khr_3d_image_writes"></a>
<h1>cl_khr_3d_image_writes</h1>
<p>
Extension to enable writes to 3D image memory objects.
</p>
</div>
<div class="refsect2">
<a id="synopsis"></a>
<h3>
</h3>
<div class="informaltable">
<table class="informaltable" border="0">
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<col align="left" class="col1" />
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<td align="left">
#pragma OPENCL EXTENSION cl_khr_3d_image_writes : enable
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
OpenCL 1.0 supports 2D image memory objects that can be read or written by kernels. Reads
and writes to the same 2D image memory object are not supported in a kernel. OpenCL 1.0 also
supports reads to 3D image memory objects in kernels. Writes to a 3D image memory object is
not allowed. The <code class="function">cl_khr_3d_image_writes</code> extension implements writes to 3D image memory objects. Reads and writes to the same 3D image memory object are not allowed in a
kernel.
</p>
<p>
An application that wants to use this extension to write to 3D image memory objects will need to
include the <code class="function">#pragma OPENCL EXTENSION cl_khr_3d_image_writes : enable</code>
directive in the OpenCL program source.
</p>
<p>
The built-in functions implemented by the <code class="function">cl_khr_3d_image_writes</code> extension are described in the table below.
</p>
<div class="informaltable">
<table class="informaltable" border="1">
<colgroup>
<col align="left" class="col1" />
<col align="left" class="col2" />
</colgroup>
<thead>
<tr>
<th align="left">Function</th>
<th align="left">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">
<p>
</p><div class="literallayout"><p><br />
void <code class="function">write_imagef</code> (<a class="link" href="otherDataTypes.html" target="_top">image3d_t</a> <code class="varname">image</code>,<br />
                   int4 <code class="varname">coord</code>,<br />
                   float4 <code class="varname">color</code>)<br />
   <br />
void <code class="function">write_imagei</code> (<a class="link" href="otherDataTypes.html" target="_top">image3d_t</a> <code class="varname">image</code>,<br />
                   int4 <code class="varname">coord</code>,<br />
                   int4 <code class="varname">color</code>)<br />
   <br />
void <code class="function">write_imageui</code> (<a class="link" href="otherDataTypes.html" target="_top">image3d_t</a> <code class="varname">image</code>,<br />
                    int4 <code class="varname">coord</code>,<br />
                    unsigned int4 <code class="varname">color</code>)</p></div><p>
</p>
</td>
<td align="left">
<p>
Write <code class="varname">color</code> value to location specified by coordinate (<code class="varname">x</code>,
<code class="varname">y</code>, <code class="varname">z</code>) in the
3D image object specified by <code class="varname">image</code>.
Appropriate data format conversion to the specified
image format is done before writing the color value.
<code class="varname">coord.x</code>, <code class="varname">coord.y</code>, and
<code class="varname">coord.z</code> are considered to be
unnormalized coordinates and must be in the range 0 ... image
stream width - 1, 0 ... image stream height - 1
and 0 ... image stream depth - 1.
</p>
<p>
<code class="function">write_imagef</code> can only be used with image objects
created with <code class="varname">image_channel_data_type</code> set to one of the
pre-defined packed formats or set to <code class="constant">CL_SNORM_INT8</code>,
<code class="constant">CL_UNORM_INT8</code>, <code class="constant">CL_SNORM_INT16</code>,
<code class="constant">CL_UNORM_INT16</code>, <code class="constant">CL_HALF_FLOAT</code> or
<code class="constant">CL_FLOAT</code>.
Appropriate data format conversion will be done to
convert channel data from a floating-point value to
actual data format in which the channels are stored.
</p>
<p>
<code class="function">write_imagei</code> can only be used with image objects
created with <code class="varname">image_channel_data_type</code> set to one of the
following values:
</p><div class="literallayout"><p>CL_SIGNED_INT8,<br />
CL_SIGNED_INT16, and<br />
CL_SIGNED_INT32.</p></div><p>
</p>
<p>
<code class="function">write_imageui</code> can only be used with image objects
created with <code class="varname">image_channel_data_type</code> set to one of the
following values:
</p><div class="literallayout"><p>CL_UNSIGNED_INT8,<br />
CL_UNSIGNED_INT16, and<br />
CL_UNSIGNED_INT32.</p></div><p>
</p>
<p>
The behavior of <code class="function">write_imagef</code>, <code class="function">write_imagei</code> and
<code class="function">write_imageui</code> for image objects with
<code class="varname">image_channel_data_type</code> values not specified in the
description above or with (<code class="varname">x</code>, <code class="varname">y</code>, <code class="varname">z</code>)
coordinate values that
are not in the range (0... image width 1, 0... image
height 1, 0... image depth 1) respectively is
undefined.
</p>
</td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
<p>
For read-write or write-only 3D images, the minimum list of supported image formats is given
by the table below:
</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" />
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<thead>
<tr>
<th align="left">
<div class="literallayout">
<p>image_num_channels  </p>
</div>
</th>
<th align="left">
<div class="literallayout">
<p>image_channel_order  </p>
</div>
</th>
<th align="left">
<div class="literallayout">
<p>image_channel_data_type  </p>
</div>
</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">
4
</td>
<td align="left">
CL_RGBA
</td>
<td align="left">
<div class="literallayout"><p><br />
CL_UNORM_INT8<br />
CL_UNORM_INT16<br />
<br />
CL_SIGNED_INT8<br />
CL_SIGNED_INT16<br />
CL_SIGNED_INT32<br />
<br />
CL_UNSIGNED_INT8<br />
CL_UNSIGNED_INT16<br />
CL_UNSIGNED_INT32<br />
<br />
CL_HALF_FLOAT<br />
CL_FLOAT<br />
</p></div>
</td>
</tr>
<tr>
<td align="left">
4
</td>
<td align="left">
CL_BGRA
</td>
<td align="left">
CL_UNORM_INT8
</td>
</tr>
</tbody>
</table>
</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=250" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="EXTENSION.html"><span class="citerefentry"><span class="refentrytitle">EXTENSION</span></span></a>,
<a class="citerefentry" href="cl_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</span></span></a>,
<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
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