ord">else</span> heightMinus1) * width)) &lt;&lt; <span class="number">2</span>
          
          r_sum += (r_in_sum += (stackIn.r = pixels[p]))
          g_sum += (g_in_sum += (stackIn.g = pixels[p + <span class="number">1</span>]))
          b_sum += (b_in_sum += (stackIn.b = pixels[p + <span class="number">2</span>]))
          
          stackIn = stackIn.next
          
          r_out_sum += (pr = stackOut.r)
          g_out_sum += (pg = stackOut.g)
          b_out_sum += (pb = stackOut.b)
        