A variable controlling how modes with a non-native aspect ratio are displayed under Wayland.
Defined in <SDL3/SDL_hints.h>
#define SDL_HINT_VIDEO_WAYLAND_MODE_SCALING "SDL_VIDEO_WAYLAND_MODE_SCALING"
When this hint is set, the requested scaling will be used when displaying fullscreen video modes that don't match the display's native aspect ratio. This is contingent on compositor viewport support.
The variable can be set to the following values:
This hint should be set before creating a window.
This hint is available since SDL 3.0.0.