A variable controlling whether the libdecor Wayland backend is preferred over native decrations.
Defined in SDL_hints.h
#define SDL_HINT_VIDEO_WAYLAND_PREFER_LIBDECOR "SDL_VIDEO_WAYLAND_PREFER_LIBDECOR"
When this hint is set, libdecor will be used to provide window decorations, even if xdg-decoration is available. (Note that, by default, libdecor will use xdg-decoration itself if available).
This variable can be set to the following values:
libdecor is used over xdg-shell when xdg-decoration protocol is unavailable.