title: Understanding UIGraphicsGetCurrentContext()
body: <p>I'm trying to understand Quartz and getting the context you have to draw on.  If I have a function where I create a context, but then I call another function to some other drawing to the same context, do I need to pass the context from the first method to the next?  Or can I just use <code>UIGraphicsGetCurrentContext()</code> for any CG methods that require a context since I'm still drawing into the same context?</p>