func NamedRenderbufferStorage(renderbuffer uint32, internalformat uint32, width int32, height int32) {
	syscall.Syscall6(gpNamedRenderbufferStorage, 4, uintptr(renderbuffer), uintptr(internalformat), uintptr(width), uintptr(height), 0, 0)
}
func NamedRenderbufferStorage(renderbuffer uint32, internalformat uint32, width int32, height int32) {
	syscall.Syscall6(gpNamedRenderbufferStorage, 4, uintptr(renderbuffer), uintptr(internalformat), uintptr(width), uintptr(height), 0, 0)
}
func NamedRenderbufferStorage ( renderbuffer uint32 , internalformat uint32 , width int32 , height int32 ) { syscall . Syscall6 ( gpNamedRenderbufferStorage , 4 , uintptr ( renderbuffer ) , uintptr ( internalformat ) , uintptr ( width ) , uintptr ( height ) , 0 , 0 ) }
// establish data storage, format and dimensions of a     renderbuffer object's image
establish data storage format and dimensions of a renderbuffer object s image