Renders page onto canvas: on white, into the area of GetPixelSize(PdfPage)
pixels at the canvas's origin, under the canvas's current transform and within its current clip. The canvas's state is the same
afterwards.
public void Render(PdfPage page, SKCanvas canvas, RenderOptions options)
The page.
The canvas.
The scale and rotation.
ISO 32000-2 §8.3.2.3, §7.7.3.3 Table 31 and §14.11.2 for the page mapping; §8.5.4: the initial clip is the page area.