How do I print from my iPad to my canon pixma wireless printer?

This site

http://support.apple.com/kb/ht4356

has a list of AirPrint compatible printers. Is your printer supported?

If not you might search the App Store for a Canon printing app, or another third party printing app that will work in conjunction with your computer.

How to Print from Your iPad: Summary of Printer and Printing Options

http://ipadacademy.com/2012/03/how-to-print-from-your-ipad-summary-of-printer-an d-printing-options

Print from iPad / iPhone without AirPrint

http://ipadhelp.com/ipad-help/print-from-ipad-iphone-without-airprint/

How to Enable AirPrint on a Mac and Use Any Printer

http://ipadhelp.com/ipad-help/how-to-use-airprint-with-any-printer/

 Cheers, Tom 😉