Retina display core graphics font quality

Question

Trying to understand why am I getting low quality drawing with CGContextShowTextAtPoint? See attached image:

Answer 1

A group of functions controls how Core Graphics renders fonts:

• CGContextSetAllowsAntialiasing
• CGContextSetAllowsFontSmoothing
• CGContextSetAllowsFontSubpixelPositioning
• CGContextSetAllowsFontSubpixelQuantization