sing</span> buffer_t = std::vector&lt;element_t&gt;;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keyword">using</span> pixel_type = Pixel;</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="keyword">using</span> iterator_t = bit_aligned_pixel_iterator&lt;pixel_type&gt;;</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div><div class="line"><a name="l00123"></a><span cl