internal/graphicsdriver/opengl/gl/package_windows.go
func Viewport(x int32, y int32, width int32, height int32) {
	syscall.Syscall6(gpViewport, 4, uintptr(x), uintptr(y), uintptr(width), uintptr(height), 0, 0)
}
func Viewport(x int32, y int32, width int32, height int32) {
	syscall.Syscall6(gpViewport, 4, uintptr(x), uintptr(y), uintptr(width), uintptr(height), 0, 0)
}
// set the viewport