i want to change rect UIImage to polygon image with different shape

I want to draw a rectangular UIImage to a polygon UIImage. Like below example.开发者_如何学编程

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you will have to look into OpenGL ES, this will definately be able to draw textures onto a plain surface which is tilted, and most likely its your only option . plus, the advantage being, you can actually animate the tilt in motion, like on coverflow

im not sure quartz can do it, but you will have to check that.