Display orientation
Defined in SDL_video.h
typedef enum SDL_DisplayOrientation
{/**< The display orientation can't be determined */
SDL_ORIENTATION_UNKNOWN, /**< The display is in landscape mode, with the right side up, relative to portrait mode */
SDL_ORIENTATION_LANDSCAPE, /**< The display is in landscape mode, with the left side up, relative to portrait mode */
SDL_ORIENTATION_LANDSCAPE_FLIPPED, /**< The display is in portrait mode */
SDL_ORIENTATION_PORTRAIT, /**< The display is in portrait mode, upside down */
SDL_ORIENTATION_PORTRAIT_FLIPPED } SDL_DisplayOrientation;