  dst_t <span class="keyword">const</span> c = <a class="code" href="group___channel_invert_algorithm.html#gabbbc7b27d9f61ff45cf5ea7ac21051f5">channel_invert</a>(channel_convert&lt;dst_t&gt;(r)); <span class="comment">// c = 1 - r</span></div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;        dst_t <span class="keyword">const</span> m = <a class="code" href="group___channel_invert_algorithm.html#gabbbc7b27d9f61ff45cf5ea7ac21051f5">channel_invert</a>(channel_convert&lt;dst_