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    <title>clEnqueueCopyImageToBuffer</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="clEnqueueCopyImageToBuffer"></a>
        <h1>
            clEnqueueCopyImageToBuffer
        </h1>
        <p>
            Enqueues a command to copy an image object to a 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">clEnqueueCopyImageToBuffer</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_image</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">*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">dst_offset</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>
                      Must be a valid host command-queue. The OpenCL context associated with
                      <code class="varname">command_queue</code>, <code class="varname">src_image</code>, and
                      <code class="varname">dst_buffer</code> must be the same.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> src_image </code> </span>
            </dt>
            <dd>
              <p>
                        A valid image object.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> dst_buffer </code> </span>
            </dt>
            <dd>
              <p>
                        A valid buffer object.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> src_origin </code> </span>
            </dt>
            <dd>
              <p>
                      Defines the (x, y, z) offset in pixels in the 1D, 2D or 3D image, the (x,
                      y) offset and the image index in the 2D image array or the (x) offset and
                      the image index in the 1D image array.  If <code class="varname">src_image</code>
                      is a 2D image object, <code class="varname">src_origin</code>[2] must be 0.
                      If <code class="varname">src_image</code> is a 1D image or 1D image buffer object,
                      <code class="varname">src_origin</code>[1] and <code class="varname">src_origin</code>[2]
                      must be 0.  If <code class="varname">src_image</code> is a 1D image array object,
                      <code class="varname">src_origin</code>[2] must be 0.  If <code class="varname">src_image</code>
                      is a 1D image array object, <code class="varname">src_origin</code>[1] describes
                      the image index in the 1D image array. If <code class="varname">src_image</code>
                      is a 2D image array object, <code class="varname">src_origin</code>[2] describes
                      the image index in the 2D image array.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> region </code> </span>
            </dt>
            <dd>
              <p>
                      Defines the (width, height, depth) in pixels of the 1D, 2D or 3D rectangle,
                      the (width, height) in pixels of the 2D rectangle and the number of images
                      of a 2D image array or the (width) in pixels of the 1D rectangle and the
                      number of images of a 1D image array.  If <code class="varname">src_image</code>
                      is a 2D image object, <code class="varname">region</code>[2] must be 1.
                      If <code class="varname">src_image</code> is a 1D image or 1D image buffer
                      object, <code class="varname">region</code>[1] and <code class="varname">region</code>[2]
                      must be 1.  If <code class="varname">src_image</code> is a 1D image array object,
                      <code class="varname">region</code>[2] must be 1. The values in <code class="varname">region</code> cannot be 0.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> dst_offset </code> </span>
            </dt>
            <dd>
              <p>
                      Refers to the offset where to begin copying data into
                      <code class="varname">dst_buffer</code>.  The size in bytes of the region to be copied
                      referred to as <code class="varname">dst_cb</code> is computed as <code class="varname">width * height * depth * bytes/image
                      element</code> if <code class="varname">src_image</code> is a 3D image object, is computed
                      as <code class="varname">width * height * bytes/image element</code> if <code class="varname">src_image</code>
                      is a 2D image, is computed as <code class="varname">width * height * arraysize * bytes/image
                      element</code> if <code class="varname">src_image</code> is a 2D image array object, is
                      computed as <code class="varname">width * bytes/image element</code> if <code class="varname">src_image</code>
                      is a 1D image or 1D image buffer object and is computed as <code class="varname">width *
                      arraysize * bytes/image element</code> if <code class="varname">src_image</code> is a 1D
                      image array object.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname">
                        event_wait_list
                    ,</code>
                    <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></h2>
        <p>
            If the mipmap extensions are enabled with 
            <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</span></span></a>, 
            calls to <a class="citerefentry" href="clEnqueueCopyImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImage</span></span></a>, 
            <code class="function">clEnqueueCopyImageToBuffer</code>, and 
            <a class="citerefentry" href="clEnqueueCopyBufferToImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBufferToImage</span></span></a> 
            can also be used to copy 
            from and to a specific mip-level of a mip-mapped image. 
            If <code class="varname">src_image</code> argument is a 1D image, 
            <code class="varname">src_origin</code>[1] specifies the mip-level 
            to use. If <code class="varname">src_image</code> argument is a 
            1D image array, <code class="varname">src_origin</code>[2] 
            specifies the mip-level to use. If <code class="varname">src_image</code> 
            argument is a 2D image, <code class="varname">src_origin</code>[3] 
            specifies the mip-level to use. 
            If <code class="varname">src_image</code> argument is a 2D image 
            array or a 3D image, <code class="varname">src_origin</code>[3] 
            specifies the mip-level to use. If 
            <code class="varname">dst_image</code> argument is a 1D image, 
            <code class="varname">dst_origin</code>[1] specifies the 
            mip-level to use. If <code class="varname">dst_image</code> argument 
            is a 1D image array, <code class="varname">dst_origin</code>[2] 
            specifies the mip-level to use. If 
            <code class="varname">dst_image</code> argument is a 2D image, 
            <code class="varname">dst_origin</code>[3] specifies the 
            mip-level to use. If <code class="varname">dst_image</code> 
            argument is a 2D image array or a 3D image, 
            <code class="varname">dst_origin</code>[3] specifies the 
            mip-level to use. 
        </p>
        <p>
            If the mip level specified is not a valid value, 
            these functions return the error 
            <span class="errorname">CL_INVALID_MIP_LEVEL</span>.
        </p>
      </div>
      <div class="refsect1">
        <a id="errors"></a>
        <h2>Errors</h2>
        <p>
          <code class="function">clEnqueueCopyImageToBuffer</code> 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 host 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_image</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_image</code> is
              not a valid image object or <code class="varname">dst_buffer</code> is not a valid buffer
              object or if <code class="varname">src_image</code> is a 1D image buffer object created
              from <code class="varname">dst_buffer</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if the 1D, 2D, or 3D rectangular region
              specified by <code class="varname">src_origin</code> and <code class="varname">src_origin</code> +
              <code class="varname">region</code> refers to a region outside <code class="varname">src_image</code>,
              or if the region specified by <code class="varname">dst_offset</code> and
              <code class="varname">dst_offset</code> + <code class="varname">dst_cb</code> refers to a region
              outside <code class="varname">dst_buffer</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if values in <code class="varname">src_origin</code>
              and <code class="varname">region</code> do not follow rules described in the argument
              description for <code class="varname">src_origin</code> and <code class="varname">region</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> &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_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_INVALID_IMAGE_SIZE</span> if image dimensions (image width,
              height, specified or compute row and/or slice pitch) for <code class="varname">src_image</code>
              are not supported by device associated with <code class="varname">queue</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_IMAGE_FORMAT_NOT_SUPPORTED</span> if image format (image channel
              order and data type) for <code class="varname">src_image</code> are not supported by 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_image</code>
              or <code class="varname">dst_buffer</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_OPERATION</span> if the device
              associated with <code class="varname">command_queue</code> does not
              support images (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 <code class="constant">CL_FALSE</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="https://www.khronos.org/registry/cl/specs/opencl-2.1.pdf#page=149" 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="clEnqueueWriteBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteBuffer</span></span></a>,
            <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>,
            <a class="citerefentry" href="clEnqueueCopyBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBuffer</span></span></a>,
            <a class="citerefentry" href="clEnqueueCopyBufferToImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBufferToImage</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
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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