OF BlackBerry PlayBook
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I don't really have much knowledge of the entire openFrameworks codebase, but the Android interface (the only one I've spent time with) is fairly self-contained and small. Specifically, look at the code in addons/ofxAndroid/src. It might be a good place to start learning how to write a Blackberry QNX interface. AFAIK it doesn't use GLUT at all.