>   65</span>&#160;    <span class="keyword">using</span> iterator_t = bit_aligned_pixel_iterator&lt;pixel_type&gt;;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    row_buffer_helper(std::size_t width, <span class="keywordtype">bool</span> in_bytes)</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        : _c{( width * pixel_bit_size&lt; pixel_type &gt