public int Restore(InternalGraphicsState state)
{
if (!_stack.Contains(state))
{
throw new ArgumentException("State not on stack.", "state");
}
if (state.Invalid)
{
throw new ArgumentException("State already restored.", "state");
}
int count = 1;
InternalGraphicsState top = _stack.Pop();
top.Popped();
while (top != state)
{
count++;
state.Invalid = true;
top = _stack.Pop();
top.Popped();
}
state.Invalid = true;
return(count);
}
public void Push(InternalGraphicsState state)
{
_stack.Push(state);
state.Pushed();
}