Returns where a render of page with these options lies within a render of the whole page at the same scale
and rotation: the whole page's pixels without a Region, else the pixels the region covers.
public PixelRectangle GetPixelRectangle(PdfPage page)
The page.
ISO 32000-2 §8.3.2.2 (device space; pixel boundaries on integer coordinates, §10.7.4).