What's the difference between Quartz Core, Core Graphics and Quartz 2D?

Question

I wonder if someone can distinguish precisely between these? For my understanding, Core Graphics is just a "Framework Package" which contains Quartz Core and Quartz 2D. But I'm not sure about if Quartz 2D actually is Quartz Core? Maybe someone can draw some lines there? What makes up the differences between these?

When looking at the documentation, I see Quartz Core is listing up all the Core Animation stuff only. So Quartz Core == Core Animation?

Answer 1

From the Quartz 2D Programming Guide:

The Quartz 2D API is part of the Core Graphics framework, so you may see Quartz referred to as Core Graphics or, simply, CG.

I have a tendency of using Quartz and Core Graphics interchangeably when referring to 2-D drawing on the Mac / iPhone, even if that's not technically correct.

The Quartz Core framework on the iPhone only contains the classes and supporting elements for Core Animation, but on the Mac it also contains items used for Core Image.