func PixelStorei(pname uint32, param int32) {
	syscall.Syscall(gpPixelStorei, 2, uintptr(pname), uintptr(param), 0)
}
func PixelStorei(pname uint32, param int32) {
	syscall.Syscall(gpPixelStorei, 2, uintptr(pname), uintptr(param), 0)
}
// set pixel storage modes