SDL 3

[timangus]

This isn't ready for review yet, I'm just putting it here as a placeholder/discussion point. It's a bare minimum get it compiling and ostensibly working effort. That being said there are quite a small number of things missing:

• Video gamma/brightness support is missing as SDL 3 removed it citing difficulty supporting it; will need to be replaced with a shader I guess. Not sure what we do for the GL1 renderer.
• SDL 3 seems to be more pixel density aware, though I confess I haven't looked into how or if that affects us.
• Linux distros don't appear to have caught up yet in terms of having SDL 3 packages, so it's probably way too soon to merge to main anyway.

Actually that's it, I think; surprisingly straight forward. Much easier than 1.2 -> 2.0 was.

[zturtleman]

Key codes are passed to the CGame/UI API. If any mods/games added support for K_PAD0_LEFTSTICK_LEFT, etc in the menu, this change would break it. This is purely hypothetical—I don't know of such mods—but that's why these buttons were separate.

K_CONSOLE is never passed to VMs, so it's last.

[timangus]

Ah I OK, I wondered what all that stuff was about. I've made a change on main to make this mapping more robust and a bit more readable, but I will also append the new buttons so they don't cause reordering.

[zturtleman]

By the way, icculus also ported ioq3 to SDL3. The function typedefs for casting function pointers seem cleaner in that port (for SDL_GL_GetProcAddress(), etc) . I haven't significantly reviewed either branch to have many comments about them.

[Calinou]

• Video gamma/brightness support is missing as SDL 3 removed it citing difficulty supporting it; will need to be replaced with a shader I guess. Not sure what we do for the GL1 renderer.

See #632.

• SDL 3 seems to be more pixel density aware, though I confess I haven't looked into how or if that affects us.

This probably won't have an effect on ioquake3 to my knowledge. I think mouse sensitivity is already DPI-independent, and 2D scaling has always been automatically scaled according to resolution in id Tech 3 (with the exception of console text, but /con_scale can fix that).

[timangus]

By the way, icculus also ported ioq3 to SDL3. The function typedefs for casting function pointers seem cleaner in that port (for SDL_GL_GetProcAddress(), etc) . I haven't significantly reviewed either branch to have many comments about them.

Two things I wish I'd known about before starting:

1. Ryan's port.
2. The semantic patching tool. That's cool.

Oh well, as I say it didn't take very long anyway. It's quite spooky how similar our patches turned out, though I missed some stuff he caught and vice versa, so it's net beneficial I guess. I had a quick skim through the video. Got slight spider man meme vibes at the sound section as I think most of the code he talks about saying "oh they have done X or Y..." was originally written by... Ryan 😁.

[timangus]

• Video gamma/brightness support is missing as SDL 3 removed it citing difficulty supporting it; will need to be replaced with a shader I guess. Not sure what we do for the GL1 renderer.

See #632.

👍

• SDL 3 seems to be more pixel density aware, though I confess I haven't looked into how or if that affects us.

This probably won't have an effect on ioquake3 to my knowledge. I think mouse sensitivity is already DPI-independent, and 2D scaling has always been automatically scaled according to resolution in id Tech 3 (with the exception of console text, but /con_scale can fix that).

The thing that made me suspect some pixel density shenanigans is going on is that for a given r_mode, on my high density display laptop when using SDL 3 the window appears much larger than it did under SDL 2. As I say though, I haven't looked into it in any detail, so that symptom could be something else entirely.