How to create an image as a smaller scale of the present scene?

I'm working on this ios 开发者_如何学运维app project with cocos2d, and I need to create an image that looks the same as the present scene but smaller, so I wonder if there's any way I can form an image directly from the scene with any functions?

You can check this link: Cocos2d ScreenShot. It's a small extension to make a screen shot as a 2D texture. After you just have to create a sprite with this texture and scale it down.