9"></a><span class="lineno">   99</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> allocateViewPort() = 0;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> checkViewPortSize() { };</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</sp