func InvalidateBufferSubData(buffer uint32, offset int, length int) {
	syscall.Syscall(gpInvalidateBufferSubData, 3, uintptr(buffer), uintptr(offset), uintptr(length))
}
func InvalidateBufferSubData(buffer uint32, offset int, length int) {
	syscall.Syscall(gpInvalidateBufferSubData, 3, uintptr(buffer), uintptr(offset), uintptr(length))
}
// invalidate a region of a buffer object's data store