Feature Request - Rotate Output

[ennok]

I'm going to be making a handheld device using an RPi that I'd like to use steam link with. My issue is the screen that I plan to use has a screen resolution of 1080 by 1920, yes it's native resolution is portrait.

The output from the RPi can be rotated easily in the config file but when done that way there's a large fps loss due to how the pi renders the scene, transfers it to memory and rotates it, then transfers it back to the output.

It took 4 lines of extra code in Moonlight to achieve this, which looks and runs amazing. I'd like to have the option to use steam link on this also.

Hope the devs might consider this.

[JlnPrssnr]

An alternative might be to turn the host screen, on Windows this is I think ctrl alt ⬅️