func RenderbufferStorage(target uint32, internalformat uint32, width int32, height int32) {
	syscall.Syscall6(gpRenderbufferStorage, 4, uintptr(target), uintptr(internalformat), uintptr(width), uintptr(height), 0, 0)
}
func RenderbufferStorage(target uint32, internalformat uint32, width int32, height int32) {
	syscall.Syscall6(gpRenderbufferStorage, 4, uintptr(target), uintptr(internalformat), uintptr(width), uintptr(height), 0, 0)
}
func RenderbufferStorage ( target uint32 , internalformat uint32 , width int32 , height int32 ) { syscall . Syscall6 ( gpRenderbufferStorage , 4 , uintptr ( target ) , 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