The custom window manager information structure.
Defined in SDL_syswm.h
struct SDL_SysWMinfo
{
SDL_version version;
SDL_SYSWM_TYPE subsystem;
union
{
#if defined(SDL_VIDEO_DRIVER_WINDOWS)
struct
{
HWND window; /**< The window handle */
HDC hdc; /**< The window device context */
HINSTANCE hinstance; /**< The instance handle */
} win;
#endif
#if defined(SDL_VIDEO_DRIVER_WINRT)
struct
{
IInspectable * window; /**< The WinRT CoreWindow */
} winrt;
#endif
#if defined(SDL_VIDEO_DRIVER_X11)
struct
{
Display *display; /**< The X11 display */
Window window; /**< The X11 window */
} x11;
#endif
#if defined(SDL_VIDEO_DRIVER_DIRECTFB)
struct
{
IDirectFB *dfb; /**< The directfb main interface */
IDirectFBWindow *window; /**< The directfb window handle */
IDirectFBSurface *surface; /**< The directfb client surface */
} dfb;
#endif
#if defined(SDL_VIDEO_DRIVER_COCOA)
struct
{
#if defined(__OBJC__) && defined(__has_feature)
#if __has_feature(objc_arc)
NSWindow __unsafe_unretained *window; /**< The Cocoa window */
#else
NSWindow *window; /**< The Cocoa window */
#endif
#else
NSWindow *window; /**< The Cocoa window */
#endif
} cocoa;
#endif
#if defined(SDL_VIDEO_DRIVER_UIKIT)
struct
{
#if defined(__OBJC__) && defined(__has_feature)
#if __has_feature(objc_arc)
UIWindow __unsafe_unretained *window; /**< The UIKit window */
#else
UIWindow *window; /**< The UIKit window */
#endif
#else
UIWindow *window; /**< The UIKit window */
#endif
GLuint framebuffer; /**< The GL view's Framebuffer Object. It must be bound when rendering to the screen using GL. */
GLuint colorbuffer; /**< The GL view's color Renderbuffer Object. It must be bound when SDL_GL_SwapWindow is called. */
GLuint resolveFramebuffer; /**< The Framebuffer Object which holds the resolve color Renderbuffer, when MSAA is used. */
} uikit;
#endif
#if defined(SDL_VIDEO_DRIVER_WAYLAND)
struct
{
struct wl_display *display; /**< Wayland display */
struct wl_surface *surface; /**< Wayland surface */
void *shell_surface; /**< DEPRECATED Wayland shell_surface (window manager handle) */
struct wl_egl_window *egl_window; /**< Wayland EGL window (native window) */
struct xdg_surface *xdg_surface; /**< Wayland xdg surface (window manager handle) */
struct xdg_toplevel *xdg_toplevel; /**< Wayland xdg toplevel role */
struct xdg_popup *xdg_popup; /**< Wayland xdg popup role */
struct xdg_positioner *xdg_positioner; /**< Wayland xdg positioner, for popup */
} wl;
#endif
#if defined(SDL_VIDEO_DRIVER_MIR) /* no longer available, left for API/ABI compatibility. Remove in 2.1! */
struct
{
void *connection; /**< Mir display server connection */
void *surface; /**< Mir surface */
} mir;
#endif
#if defined(SDL_VIDEO_DRIVER_ANDROID)
struct
{
ANativeWindow *window;
EGLSurface surface;
} android;
#endif
#if defined(SDL_VIDEO_DRIVER_OS2)
struct
{
HWND hwnd; /**< The window handle */
HWND hwndFrame; /**< The frame window handle */
} os2;
#endif
#if defined(SDL_VIDEO_DRIVER_VIVANTE)
struct
{
EGLNativeDisplayType display;
EGLNativeWindowType window;
} vivante;
#endif
#if defined(SDL_VIDEO_DRIVER_KMSDRM)
struct
{
int dev_index; /**< Device index (ex: the X in /dev/dri/cardX) */
int drm_fd; /**< DRM FD (unavailable on Vulkan windows) */
struct gbm_device *gbm_dev; /**< GBM device (unavailable on Vulkan windows) */
} kmsdrm;
#endif
/* Make sure this union is always 64 bytes (8 64-bit pointers). */
/* Be careful not to overflow this if you add a new target! */
Uint8 dummy[64];
} info;
};When this structure is returned, it holds information about which low level system it is using, and will be one of SDL_SYSWM_TYPE.