Flag to request a fullscreen window, possibly with a resolution change.
Defined in SDL_video.h
If this window flag is included in SDL_CreateWindow's flags, the window will be created in fullscreen mode.
SDL may change the display's resolution to accomodate this window. If you just want to cover the entire screen, and your game can deal with arbitrary resolutions, you should use SDL_WINDOW_FULLSCREEN_DESKTOP instead of this flag, as it will not change the display's resolution.