SDL scaling should be implemented.

[evertvorster]

Right now, if you select a resolution that is less than your monitor's native resolution, and put it to full screen,
the game displays with a black border that makes up the difference between the monitors native resolution and the requested game resolution.

I believe that SDL may have a function where it can scale the requested resolution to the monitor's native resolution.
Would it be possible to implement this as a menu option?
It would then be possible to pick a resolution that works well with the game UI, and simply scale it to match the native resolution of the requested monitor.

[evertvorster]

Here is a screenshot of SDL not scaling to the full screen when requested full screen mode:

[royfalk]

Note that the issue you're referring to is #913 and not SDL scaling. This game (and most others), does not respect the OS scaling parameter. A ship, 1000m in front, would appear the same in any resolution. By same I mean wrt size. The main issue I see is one of fonts.

However, given that the current fonts are part of a from-scratch widgets, I suspect this will wait until we migrate to another system.