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<h4>getScaleFactor</h4>
<pre>public abstract&nbsp;float&nbsp;getScaleFactor(int&nbsp;sourceWidth,
                                     int&nbsp;sourceHeight,
                                     int&nbsp;requestedWidth,
                                     int&nbsp;requestedHeight)</pre>
<div class="block">Returns a float (0, +infinity) indicating a scale factor to apply to the source
 width and he