ss="keyword">const</span> View&amp; src, <span class="keyword">const</span> <span class="keyword">typename</span> View::point_t&amp; topleft, <span class="keyword">const</span> <span class="keyword">typename</span> View::point_t&amp; dimensions) {
<a name="l00260"></a>00260     <span class="keywordflow">return</span> View(dimensions,src.xy_at(topleft));
<a name="l00261"></a>00261 }
<a name="l00262"></a>00262 
<a name="l00264"></a>00264 <span class="keyword">template</span> &lt;<span class="keyword">typename