Given a CGMutablePathRef how do I draw a UIImage in it? I know that you can draw it like the following:
UIImage* scaledImage = UIGraphicsGetImageFromCurrentImag
When you say "draw within a CGMutablePath" I have to assume you mean "clip to a CGMutablePath." In that case, you just need to add the path to the current context (CGContextAddPath() or any of the path-building functions like CGContextAddLineToPoint()) and then call CGContextClip(). You can then draw your image in the context with something like drawAtPoint: or CGContextDrawImage().
I think that you are choosing the hard way of doing it.
Your approach assumes that you have already got a bitmap and created a bitmap based graphics context. At your place I would just use UIImage's :
- (void)drawAtPoint:(CGPoint)point;