macos - NSWindow Background Magnify

Question

I know it is possible to blur the background of an NSWindow, but is it possible to magnify whatever is behind the window and show it, or even do the same for the window's content view?

Thanks

Answer 1

Take a look at Apple's example CIAnnotation. You can download sample code from here.

CIAnnotation app example:

References and guides which can help You with this:

Core Image Programming guide
Quartz 2D Programming Guide
NSGraphicsContext Class Reference