glPopAttrib restores the values of the state variables saved with the last glPushAttrib command. Those not saved are left unchanged.
It is an error to push attributes onto a full stack or to pop attributes off an empty stack. In either case, the error flag is set and no other change is made to GL state.
glPopAttribrestores the values of the state variables saved with the last glPushAttrib command. Those not saved are left unchanged.It is an error to push attributes onto a full stack or to pop attributes off an empty stack. In either case, the error flag is set and no other change is made to GL state.
Initially, the attribute stack is empty.