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<title>clEnqueueCopyBufferRect</title>
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<div class="refentry">
<a id="idm1"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="clEnqueueCopyBufferRect"></a>
<h1>
clEnqueueCopyBufferRect
</h1>
<p>
Enqueues a command to copy a rectangular region from a buffer object to another buffer 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="scalarDataTypes.html" target="pagedisplay">cl_int</a> <strong class="fsfunc">clEnqueueCopyBufferRect </strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_command_queue</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">src_buffer</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">dst_buffer</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*src_origin</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst_origin</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*region</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">src_row_pitch</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">src_slice_pitch</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">dst_row_pitch</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">dst_slice_pitch</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_uint</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_events_in_wait_list</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event_wait_list</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event</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"> command_queue </code> </span>
</dt>
<dd>
<p>
The command-queue in which the copy command will be queued. The
OpenCL context associated with <code class="varname">command_queue</code>,
<code class="varname">src_buffer</code>, and <code class="varname">dst_buffer</code> must be
the same.
</p>
</dd>
<dt>
<span class="term">
<code class="varname">
src_origin
</code>
</span>
</dt>
<dd>
<p>
The (<span class="emphasis"><em>x, y, z</em></span>) offset in the memory region associated
with <code class="varname">src_buffer</code>. For a 2D rectangle region, the
<code class="varname">z</code> value given by <code class="varname">src_origin</code>[2] should
be 0. The offset in bytes is computed as <code class="varname">src_origin</code>[2]
* <code class="varname">src_slice_pitch</code> + <code class="varname">src_origin</code>[1]
* <code class="varname">src_row_pitch</code> + <code class="varname">src_origin</code>[0].
</p>
</dd>
<dt>
<span class="term"> <code class="varname"> dst_origin </code> </span>
</dt>
<dd>
<p>
The (<span class="emphasis"><em>x, y, z</em></span>) offset in the memory region associated
with <code class="varname">dst_buffer</code>. For a 2D rectangle region, the
<code class="varname">z</code> value given by <code class="varname">dst_origin</code>[2] should
be 0. The offset in bytes is computed as <code class="varname">dst_origin</code>[2]
* <code class="varname">dst_slice_pitch</code> + <code class="varname">dst_origin</code>[1]
* <code class="varname">dst_row_pitch</code> + <code class="varname">dst_origin</code>[0].
</p>
</dd>
<dt>
<span class="term"> <code class="varname">region</code> </span>
</dt>
<dd>
<p>
The (<span class="emphasis"><em>width, height, depth</em></span>) in bytes of the 2D or 3D
rectangle being copied. For a 2D rectangle, the <code class="varname">depth</code>
value given by <code class="varname">region</code>[2] should be 1.
</p>
</dd>
<dt>
<span class="term"> <code class="varname">src_row_pitch</code> </span>
</dt>
<dd>
<p>
The length of each row in bytes to be used for the memory region associated
with <code class="varname">src_buffer</code>. If <code class="varname">src_row_pitch</code> is 0,
<code class="varname">src_row_pitch</code> is computed as <code class="varname">region</code>[0].
</p>
</dd>
<dt>
<span class="term"> <code class="varname">src_slice_pitch</code> </span>
</dt>
<dd>
<p>
The length of each 2D slice in bytes to be used for the
memory region associated with <code class="varname">src_buffer</code>. If
<code class="varname">src_slice_pitch</code> is 0, <code class="varname">src_slice_pitch</code>
is computed as <code class="varname">region</code>[1] *
<code class="varname">src_row_pitch</code>.
</p>
</dd>
<dt>
<span class="term"> <code class="varname">dst_row_pitch</code> </span>
</dt>
<dd>
<p>
The length of each row in bytes to be used for the memory region associated
with <code class="varname">dst_buffer</code>. If <code class="varname">dst_row_pitch</code> is 0,
<code class="varname">dst_row_pitch</code> is computed as <code class="varname">region</code>[0].
</p>
</dd>
<dt>
<span class="term"> <code class="varname">dst_slice_pitch</code> </span>
</dt>
<dd>
<p>
The length of each 2D slice in bytes to be used for the
memory region associated with <code class="varname">dst_buffer</code>. If
<code class="varname">dst_slice_pitch</code> is 0, <code class="varname">dst_slice_pitch</code>
is computed as <code class="varname">region</code>[1] *
<code class="varname">dst_row_pitch</code>.
</p>
</dd>
<dt>
<span class="term">
<code class="varname">
event_wait_list
</code>
, </span>
<span class="term">
<code class="varname">
num_events_in_wait_list
</code>
</span>
</dt>
<dd>
<p>
Specify events that need to complete before this particular
command can be executed. If <code class="varname">event_wait_list</code>
is NULL, then this particular command does not wait on any
event to complete. If <code class="varname">event_wait_list</code> is
NULL, <code class="varname">num_events_in_wait_list</code> must be 0. If
<code class="varname">event_wait_list</code> is not NULL, the list of events
pointed to by <code class="varname">event_wait_list</code> must be valid
and <code class="varname">num_events_in_wait_list</code> must be greater
than 0. The events specified in <code class="varname">event_wait_list</code>
act as synchronization points. The context associated with events in
<code class="varname">event_wait_list</code> and <code class="varname">command_queue</code> must
be the same. The memory associated with <code class="varname">event_wait_list</code>
can be reused or freed after the function returns.
</p>
</dd>
<dt>
<span class="term"> <code class="varname"> event </code> </span>
</dt>
<dd>
<p>
Returns an event object that identifies this particular copy command
and can be used to query or queue a wait for this particular
command to complete. <code class="varname">event</code> can be NULL in
which case it will not be possible for the application to query the
status of this command or queue a wait for this command to complete.
<a class="citerefentry" href="clEnqueueBarrierWithWaitList.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueBarrierWithWaitList</span></span></a>
can be used instead. If the <code class="varname">event_wait_list</code>
and the <code class="varname">event</code> arguments are not NULL, the
<code class="varname">event</code> argument should not refer to an element of the
<code class="varname">event_wait_list</code> array.
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
<code class="function">clEnqueueCopyBufferRect</code>enqueues a command to copy a 2D or 3D
rectangular region from the buffer object identified by <code class="varname">src_buffer</code>
to a 2D or 3D region in the buffer object identified by <code class="varname">dst_buffer</code>.
Copying begins at the source offset and destination offset which are computed
as described in the description for <code class="varname">src_origin</code> and
<code class="varname">dst_origin</code>.
</p>
<p>
Each byte of the region's width is copied from the source offset to the destination
offset. After copying each width, the source and destination offsets are incremented by
their respective source and destination row pitches. After copying each 2D rectangle,
the source and destination offsets are incremented by their respective source and
destination slice pitches.
</p>
<p>
NOTE: If <code class="varname">src_buffer</code> and <code class="varname">dst_buffer</code>
are the same buffer object, <code class="varname">src_row_pitch</code> must equal
<code class="varname">dst_row_pitch</code> and <code class="varname">src_slice_pitch</code> must equal
<code class="varname">dst_slice_pitch</code>.
</p>
</div>
<div class="refsect1">
<a id="errors"></a>
<h2>Errors</h2>
<p>
Returns <span class="errorname">CL_SUCCESS</span> if the function is executed successfully.
Otherwise, it returns one of the following errors:
</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_COMMAND_QUEUE</span> if <code class="varname">command_queue</code>
is not a valid command-queue.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if the context associated
with <code class="varname">command_queue</code>, <code class="varname">src_buffer</code>, and
<code class="varname">dst_buffer</code> are not the same or if the context associated with
<code class="varname">command_queue</code> and events in <code class="varname">event_wait_list</code>
are not the same.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MEM_OBJECT</span> if <code class="varname">src_buffer</code>
and <code class="varname">dst_buffer</code> are not valid buffer objects.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if (<code class="varname">src_offset</code>,
<code class="varname">region</code>) or (<code class="varname">dst_offset</code>,
<code class="varname">region</code>) require accessing elements outside the
<code class="varname">src_buffer</code> and <code class="varname">dst_buffer</code> objects respectively.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if any <code class="varname">region</code> array
element is 0.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">src_row_pitch</code>
is not 0 and is less than <code class="varname">region</code>[0].
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">dst_row_pitch</code>
is not 0 and is less than <code class="varname">region</code>[0].
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">src_slice_pitch</code> is not
0 and is less than <code class="varname">region</code>[1] * <code class="varname">src_row_pitch</code>
or if <code class="varname">src_slice_pitch</code> is not 0 and is not a multiple of
<code class="varname">src_row_pitch</code>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">dst_slice_pitch</code> is not
0 and is less than <code class="varname">region</code>[1] * <code class="varname">dst_row_pitch</code>
or if <code class="varname">dst_slice_pitch</code> is not 0 and is not a multiple of
<code class="varname">dst_row_pitch</code>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">src_buffer</code>
and <code class="varname">dst_buffer</code> are the same buffer
object and <code class="varname">src_slice_pitch</code> is not equal to
<code class="varname">dst_slice_pitch</code> and <code class="varname">src_row_pitch</code> is not
equal to <code class="varname">dst_row_pitch</code>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT_WAIT_LIST</span>
if <code class="varname">event_wait_list</code> is NULL and
<code class="varname">num_events_in_wait_list</code> is >
0, or <code class="varname">event_wait_list</code> is not NULL and
<code class="varname">num_events_in_wait_list</code> is 0, or if event objects in
<code class="varname">event_wait_list</code> are not valid events.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MEM_COPY_OVERLAP</span> if <code class="varname">src_buffer</code>
and <code class="varname">dst_buffer</code> are the same buffer object and the source
and destination regions overlap or if <code class="varname">src_buffer</code> and
<code class="varname">dst_buffer</code> are different sub-buffers of the same associated
buffer object and they overlap. Refer to Appendix E in the OpenCL specification
for details on how to determine if source and destination regions overlap.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MISALIGNED_SUB_BUFFER_OFFSET </span> if
<code class="varname">src_buffer</code> is a sub-buffer object and <code class="varname">offset</code>
specified when the sub-buffer object is created is not aligned to
<code class="constant">CL_DEVICE_MEM_BASE_ADDR_ALIGN</code> value for device associated
with <code class="varname">queue</code>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MISALIGNED_SUB_BUFFER_OFFSET </span> if
<code class="varname">dst_buffer</code> is a sub-buffer object and <code class="varname">offset</code>
specified when the sub-buffer object is created is not aligned to
<code class="constant">CL_DEVICE_MEM_BASE_ADDR_ALIGN</code> value for device associated
with <code class="varname">queue</code>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MEM_OBJECT_ALLOCATION_FAILURE</span> if there is a failure
to allocate memory for data store associated with <code class="varname">src_buffer</code>
or <code class="varname">dst_buffer</code>.
</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="http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf#page=81" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="clEnqueueReadBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadBuffer</span></span></a>,
<a class="citerefentry" href="clEnqueueReadBufferRect.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadBufferRect</span></span></a>,
<a class="citerefentry" href="clEnqueueWriteBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteBuffer</span></span></a>,
<a class="citerefentry" href="clEnqueueWriteBufferRect.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteBufferRect</span></span></a>,
<a class="citerefentry" href="clEnqueueCopyBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBuffer</span></span></a>,
<a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>,
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>,
<a class="citerefentry" href="clEnqueueCopyBufferToImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBufferToImage</span></span></a>,
<a class="citerefentry" href="clEnqueueCopyImageToBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImageToBuffer</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
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