span>])) * rbs

        r_in_sum += pr
        g_in_sum += pg
        b_in_sum += pb

        stack = stack.next

        yp += width <span class="keyword">if</span> i &lt; heightMinus1
        
      yi = x
      stackIn = stackStart
      stackOut = stackEnd
      
      <span class="keyword">for</span> y <span class="keyword">in</span> [<span class="number">0.</span>..height]
        p = yi &lt;&lt; <span class="number">2</span>
        pixels[p] = (r_sum * mul_sum) &gt;&gt; shg_sum
        pixels[p + <s