The Shape of Everything
A website mostly about Mac stuff, written by August "Gus" Mueller
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August 18, 2007
(This post is from my old, old, super old site. My views have changed over the years, hopefully my writing has improved, and there is now more than a handful of folks reading my site. Enjoy.)

Safe From The Losing Fight: How to implement a basic bitmap.

Andy Finnel shows how to make a basic little cocoa paint app, which is backended to a CGBitmapContext. Cool. He's got a downloadable app as well.