Returns the transform from page's default user space to the pixels of a bitmap of
GetPixelSize(PdfPage): origin at the top-left corner of the rotated crop box (or of the Region's pixels), y
down, one unit = one pixel.
public Matrix GetDeviceTransform(PdfPage page)
The page.
ISO 32000-2 §8.3.2.2 (device space), §8.3.2.3 (default user space and UserUnit), §7.7.3.3 Table 31 (Rotate: the
page is shown turned clockwise) and §14.11.2 (crop box).