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The ability to draw two dimensional graphics on the iPhone is provided as part of the Core Graphics Framework in the form of the Quartz 2D API. The iOS implementation of Quartz on the iPhone is the same implementation as that provided with Mac OS X and provides a set of C functions designed to enable the drawing of 2D graphics in the form of images, lines and shapes together with range of fill patterns and gradients.
In this chapter we will provide an overview of Quartz 2D. The next chapter, entitled [[An iOS 6 iPhone Graphics Drawing Tutorial using Quartz 2Dand Core Image]], provides a step-by-step tutorial designed to teach the basics of two dimensional drawing on the iPhone.
== Introducing Core Graphics and Quartz 2D ==
