It is possible to access windows API functions from Powershell, but it's not particularly simple. I think you can define a method that calls an API function? Alternatively you can go via C#. In theory you could access the DirectX primitives that way.

DX is a pretty low level API though. Unreal and Unity exist for a reason.

> Drawing modern graphics is not done by blitting pixels onto a framebuffer

That's a choice. The hardware still supports it. It is still possible (and fast-ish and simple) to do graphics by blitting pixels.

Having a bitmap in normal system memory that we can write to the window or screen is easy though and should be more widely supported. Once you've got that you can write pixels, lines, rectangles, mandlebrots etc very easily and building up to a GUI toolkit is also quite easy and fun. This mechanism is fast enough for pretty much everything other than games on modern hardware.

I consider GPU acceleration a form of premature optimization - it adds complexity unnecessarily in many cases.

Here's my library for doing that on Windows and X11. https://github.com/abainbridge/deadfrog-lib