Implement Set-MonitorBrightness

[StefanGreve]

TODO

• Windows
• MacOS
• Linux

Note: Keep this issue open until all three platforms have been covered.

About

MacOS

There are third-party libraries that can do this, such as brightness but I am trying to avoid pulling in dependencies as much as possible.

Running Apple Script works, but it will require access to accessibility features in the settings menu of the terminal application on the first run.

# reduce brightness by 1/16, use key code 113 to increase the brightness by 1 bar 
osascript -e 'tell application "System Events"' -e 'key code 107' -e ' end tell'

Interestingly enough, there are two set of key codes for sending key strokes to adjust brightness [1], i.e.

Key Code	Function
107	decrease
145	decrease
113	increase
144	increase

Preferably, I would also need a way to get the current brightness value. In theory I could reset the brightness to 0% and then work my way up to the requested values, by mapping all integers from [0,100] to [0,16], but that's far from ideal.

References

• [1] https://eastmanreference.com/complete-list-of-applescript-key-codes