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    <title>clEnqueueAcquireGLObjects</title>
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    <div class="refentry">
      <a id="idm1"></a>
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      <div xmlns="" class="refnamediv">
        <a xmlns="http://www.w3.org/1999/xhtml" id="clEnqueueAcquireGLObjects"></a>
        <h1>clEnqueueAcquireGLObjects</h1>
        <p>
            Acquire OpenCL memory objects that have been created from OpenGL objects.
        </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="_top">cl_int</a>

                    <strong class="fsfunc">                   
                        clEnqueueAcquireGLObjects
                    </strong>
                (</code>
                <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">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="scalarDataTypes.html" target="_top">cl_uint</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_objects</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">cl_mem</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*mem_objects</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_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="_top">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="_top">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> 
A valid command-queue. All devices used to create the OpenCL context
associated with <code class="varname">command_queue</code> must support acquiring shared CL/GL objects.
This constraint is enforced at context creation time.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                        num_objects
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
The number of memory objects to be acquired in <code class="varname">mem_objects</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                        mem_objects
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
A pointer to a list of CL memory objects that correspond to GL objects.
                    </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> 
Specifies 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.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname"> 
                        event
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
Returns an event object that identifies this command and can be used
to query or queue a wait for the 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.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
These
objects need to be acquired before they can be used by any OpenCL commands queued to a
command-queue. The OpenGL objects are acquired by the OpenCL context associated with
<code class="varname">command_queue</code> and can therefore be used by all command-queues associated with the OpenCL
context.
        </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. If
<code class="varname">num_objects</code> is 0 and <code class="varname">mem_objects</code> is NULL
the function does nothing and returns <span class="errorname">CL_SUCCESS</span>.
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_VALUE</span> if <code class="varname">num_objects</code> is zero and <code class="varname">mem_objects</code> is not a NULL value or if <code class="varname">num_objects</code> &gt; 0 and <code class="varname">mem_objects</code> is NULL.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MEM_OBJECT</span> if memory objects in <code class="varname">mem_objects</code> are not valid OpenCL memory objects.
            </li>
            <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 context associated with <code class="varname">command_queue</code> was not created from an OpenGL context.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_GL_OBJECT</span> if memory objects in <code class="varname">mem_objects</code> have not been created from a GL object(s).
            </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> &gt; 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_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=287" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="clEnqueueReleaseGLObjects.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReleaseGLObjects</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
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials. 
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