Function SDL_GetWindowFullscreenMode 

pub unsafe extern "C" fn SDL_GetWindowFullscreenMode(
    window: *mut SDL_Window,
) -> *const SDL_DisplayMode

Query the display mode to use when a window is visible at fullscreen.

Parameter: window the window to query. Returns: a pointer to the exclusive fullscreen mode to use or NULL for borderless fullscreen desktop mode.

Thread Safety: This function should only be called on the main thread.

Available Since: This function is available since SDL 3.2.0.

See Also: SDL_SetWindowFullscreenMode See Also: SDL_SetWindowFullscreen