How to set ClipRect correct

[Dirk Weltz]

I use SkiaSharp with SKGLView. I draw some SKPaths on canvas with `DrawPath()`. When I increase the scale, so that I only see a small part of the paths (sometimes even nothing is drawn on the canvas), than the time to draw is increasing dramatically. It needs 200 ms to draw nothing on the canvas.

I assume, that the problem is, that the clipping rectangle isn't set correct. But how to set it? It should only as large as the paths, that are be drawn, but not larger than the screen. How could this be achived?

Thank you for your help.