Android :: How To Obtain The Current Bitmap Of A Canvas

I want to get the current bitmap associated with my canvas so I can perform operations on it. I can't see how to do this though.

I've seen some examples where you create a bitmap and set the canvas to use this bitmap, so obviously you can then access it later, but I'm using the canvas returned from a SurfaceHolder so there's no constructor.

For instance, examples often show this kind of thing:

CODE:...........

So at this point I can see bmp.

In my case, the canvas is obtained by:

CODE:......

So how can I get the bitmap for c?

In short, my aim is to capture the current canvas contents where I have drawn "stuff", and make a copy of it, reversed, to put underneath. Like a reflection. The example of this that I found performed it all via bitmaps, so I assumed I needed to somehow capture the current canvas to a bitmap to then use it.