SDL2 game is blurry on native Wayland

[slouken]

Hello, I'm not 100% sure if this is the right issue to ask, but we're having an issue where our SDL2 game looks sharp and pixel-perfect via xWayland on a Wayland session set to 125% scaling, but when running it in native Wayland mode, the game is now blurry. DPI scaling works correctly on Windows too. We're wondering if we're missing a hint or something to make sure the window is DPI aware on Linux with native Wayland. Could you point me in the right direction?

Originally posted by @Reonu in #12140

[Reonu]

Hello, does you creating this issue mean this is a known issue with SDL2? Or do you need more details from me? Thanks!

[slime73]

Does your SDL2 game use SDL_WINDOW_ALLOW_HIGHDPI?

[Reonu]

Does your SDL2 game use SDL_WINDOW_ALLOW_HIGHDPI?

We weren't using it, we were just using SDL_SetHint(SDL_HINT_WINDOWS_DPI_AWARENESS, "permonitorv2") instead, which I realize now it's probably only for Windows? (Remember that it behaves correctly on Windows: the game is still sharp there)

In any case, I just tried adding the flag, and the issue still remains.

Let me know if you need me to test or check anything else.