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<title>imageAccessQualifiers</title>
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<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="imageAccessQualifiers"></a>
<h1>Image Access Qualifiers</h1>
<p>
Access Qualifiers for image memory objects.
</p>
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<div class="refsect2">
<a id="synopsis"></a>
<h3>
</h3>
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__read_only
__write_only
read_only
write_only
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<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
Image memory objects specified as arguments to a kernel can be declared to be read-only or
write-only. A kernel cannot read from and write to the same image memory object. The
<code class="function">__read_only</code> (or <code class="function">read_only</code>) and
<code class="function">__write_only</code> (or <code class="function">write_only</code>) qualifiers
must be used with image memory object arguments to declare if the image memory object is
being read or written by a kernel. The default qualifier is <code class="function">__read_only</code>.
</p>
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<div class="refsect2">
<a id="example1"></a>
<h3>
Example
</h3>
<p>
In the example below, <code class="constant">imageA</code> is a read-only image memory object and
<code class="constant">imageB</code> is a write-only image memory object.
</p>
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__kernel void
foo (read_only image2d_t imageA,
write_only image2d_t imageB)
{
...
}
</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=153" target="OpenCL Spec">OpenCL Specification</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.
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"Materials"), to deal in the Materials without restriction, including
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