vpinball configgen: pup support and 4:3 backglass ratio

[toccata10]

Pup Pack are becoming a reality for vpinball, so we need to position the windows easily.
I also added the possibility to force a 4:3 aspect ratio for the backglass on the 2nd screen.
Marking as draft as it works on my system, but I'm looking for some feedback and testing.

[nadenislamarre]

i guess that ratio screen243 should not be an option but something detected ?
is it game dependant ?
for the the name is not clear about what it must do. it looks like more a very custom case.
eventually, vpinball_pupbackglass_ratio ?

[toccata10]

I don't know how the backglass ratio can be detected: it's probably in the directb2s file but I've no idea how to open that.
Unfortunately, the ratio is very game dependant. I've read in the forum that a guy took measurements of many different real backglasses and they were all different (manufacturer dependant and game dependant), but 4:3 is good approximation for all the traditional tables.
Can it be 16:9 ? yes it can. I've seen some directb2s creations in 16:9 (specially for original tables) or just because the guy had a 16:9 monitor and wanted no black bars around the backglass (and created some custom artwork).
The ratio for the pupbackglass is easier as it has to be always 16:9. Same for pupfulldmd.
Is the name screen2_ratio43 better for you ?
If we want to avoid stretching of the pupbackglass when we have flexdmd and pupbackglass on the 2nd screen, we should add an option with screen2_ratio169. But it seems so specific, that we can wait if the need appears before coding it (it's already quite complex imo).

A very cool feature is also this project: https://vpuniverse.com/files/file/16556-teachers-pet-williams-1965-169-background-for-43-b2s-backglass/
If I have time, maybe I'll experiment in a future version by creating a pygame window with this kind of background image at the beginning of the configgen before launching vpinball.

[toccata10]

Discussing with you gives me more ideas...
A better solution would be to add a setting "backglass aspect ratio" with choices 4:3 and 16:9, and just keep the screen2 variable.