        </em>
              </span>
            </dt>
            <dd>
              <p>
                    Bitwise OR of masks that indicate the buffers to be cleared.
                    The three masks are
                    <code class="constant">GL_COLOR_BUFFER_BIT</code>,
                    <code class="constant">GL_DEPTH_BUFFER_BIT</code>, and
                    <code class="constant">GL_STENCIL_BUFFER_BIT</code>.
                </p>
            </dd>
          </dl>
        </div>
      </div>
