{

SDL_bool HAS_WGL_ARB_pixel_format;

SDL_bool HAS_WGL_EXT_swap_control_tear;

void *(WINAPI * wglGetProcAddress) (const char *proc);

HGLRC(WINAPI * wglCreateContext) (HDC hdc);

BOOL(WINAPI * wglDeleteContext) (HGLRC hglrc);

BOOL(WINAPI * wglMakeCurrent) (HDC hdc, HGLRC hglrc);

BOOL(WINAPI * wglShareLists) (HGLRC hglrc1, HGLRC hglrc2);

BOOL(WINAPI * wglChoosePixelFormatARB) (HDC hdc,

const int *piAttribIList,

const FLOAT * pfAttribFList,

UINT nMaxFormats,

int *piFormats,

UINT * nNumFormats);

BOOL(WINAPI * wglGetPixelFormatAttribivARB) (HDC hdc, int iPixelFormat,

int iLayerPlane,

UINT nAttributes,

const int *piAttributes,

int *piValues);

BOOL (WINAPI * wglSwapIntervalEXT) (int interval);

int (WINAPI * wglGetSwapIntervalEXT) (void);