please port to SDL2

[a-detiste]

SDL1 is slowly being removed

In fact it has already replace by sdl1-compat which is a stub library that wraps SDL2;
but not ... perfectly

SDL2 has better Wayland support

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038484

[simenheg]

It would be nice to have an SDL2 port, I even attempted one a couple of years ago: master...sdl2. I think it still has a long way to go.

I'm not sure I'll have the time or motivation to go through with the port, but if anyone wants to have a go at it, help would be greatly appreciated!

[stianval]

I've been playing with this for a while, and think I have something working now. I think I can clean up a bit and make a PR within the next few days.

[simenheg]

Very cool, @stianval! I'll check out the PR as soon as I get the chance. 😃

[simenheg]

I've merged #4. The game seems to work pretty well now in my testing, thanks a lot @stianval!

A few remaining bugs I've noticed during testing:

• There are some problems switching between fullscreen and windowed mode.
• The Ghost walk weapon turns the screen black.

[simenheg]

I've discovered another regression from the SDL1 version, though I don't know how easy/possible it is to support it in SDL2. In the SDL1 version, you could resize the window to some shape you'd like for the map (or even maximize the window), and the map would reshape accordingly, whereas in the SDL2 version, the graphics are scaled/stretched instead.

[a-detiste]

Take your time and enjoy the ride ;-)

[stianval]

I've discovered another regression from the SDL1 version, though I don't know how easy/possible it is to support it in SDL2. In the SDL1 version, you could resize the window to some shape you'd like for the map (or even maximize the window), and the map would reshape accordingly, whereas in the SDL2 version, the graphics are scaled/stretched instead.

I just tested the SDL1 version and I think the behavior should not be too difficult to recreate. The main difficulty would be to keep the window size for fullscreen mode, but I think that should also be doable ;)