of the image to be downsampled.</dd>
<dd><code>sourceHeight</code> - The height in pixels of the image to be downsampled.</dd>
<dd><code>requestedWidth</code> - The width in pixels of the view/target the image will be displayed in.</dd>
<dd><code>requestedHeight</code> - The height in pixels of the view/target the image will be displayed in.</dd>
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<h4>getSampleSizeRounding</h4