This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Does anyone have a good example of double buffering? I have an image that contains a deck of cards. I want to put the huge deck of cards in the background and just grab the rectangle of the current card image that I need.