Vulkan renderer only draws in top quarter of screen

[ostrich]

I'm on Arch Linux using Nvidia Open drivers and Wayland. I'm using the quake3e-git package from the AUR.

Using the Vulkan renderer, the game only renders in the top quarter of my fullscreen window as shown. When I set r_fullscreen 0, the game still only renders in the top quarter of the window. cl_renderer opengl renders the entire fullscreen window as expected.

Perhaps relevant settings:

seta r_mode "-1"
seta r_customwidth "3840"
seta r_customheight "2160"
seta cl_renderer "vulkan"
seta r_fullscsreen "1"

[ensiform]

Seems like wayland is reporting wrong size to game due to scaling factor. Are you using xwayland or did you force to wayland with sdl video driver env? r_mode is not used by default in r_fullscreen 1, r_modeFullscreen is. Also if your desktop resolution is in fact 4k you should be able to use -2 and not specify the width/height cvars.

Note it works fine for 4k res for me under Manjaro Linux KDE. Albeit this is X11 and NOT wayland.

[ostrich]

It is using Wayland. Still getting the same behavior with r_mode -2 and r_modeFullscreen -2.

----- Initializing Renderer ----
-------------------------------
----- R_Init -----
SDL using driver "wayland"
Initializing Vulkan display
...setting mode -2: 3072 1728
Using 24 color bits, 24 depth, 8 stencil display.

[ensiform]

You should probably try to force it to use x11 with SDL_VIDEODRIVER=x11 env var and have xwayland translate it. Wayland support is at the mercy of whatever SDL2 can handle with whatever scaling is on your machine.

[ostrich]

Vulkan does work correctly with SDL_VIDEODRIVER=x11. For what it's worth, I'm using KDE Plasma 6.2.3 at 125% scaling. Thanks for your help.

[ec-]

Try to compile and run debug build and post \condump contents here

[ensiform]

SDL_WINDOW_ALLOW_HIGHDPI presumably desired on wayland and macOS but even then not guaranteed. SDL_Vulkan_GetDrawableSize / SDL_GL_GetDrawableSize / SDL_GetWindowSize will have different behavior iirc.

Not really great wayland support with highdpi until SDL3 which has a lot of other downsides still that I can tell.

[ec-]

SDL2 might not report correctly window dimensions for Vulkan in Wayland mode, I see no reliable ways to fix this on engine side

[ostrich]

now SDL_VIDEODRIVER=x11 doesn't seem to work, which did before

[ensiform]

What else did you change on the system?