Why do images for textures on the iPhone need to have power-of-two dimensions?

Question

I\'m trying to solve this flickering problem on the iphone (open gl es game). I have a few images that don\'t have pow-of-2 dimensions. I\'m going to replace them with images

Answer 1

1. You can find OpenGL ES support info about Apple Ipod/Iphone devices here: Apple OpenES support
2. OpenGL ES 2.0 is defined as equal to OpenGL 2.0
3. The constraint about texture size's has been disappear only from version 2.0 So if you use OpenGL ES with version less then 2.0 - it is normal situation.