[RESOLVED] Cairo Surface Image Splitting [L-Plate Learner Edition]

[-Corso->]

Hi All,
Just wondering what I'm doing wrong. Do I need to Clip, TranslateDrawings or some combination or other?
I have a surface with a picture (with some transparent bits), I would like to copy said image to two other surfaces, but there's a problem and my understanding is very lacking.
So far, I think I'm supposed to 'Clip define' the 'My_Surface', then copy that to Surface_A? Somehow? I don't quite get it. Is that what I'm supposed to do?

I've tried RenderingSurfaceContent (OK), then TranslateDrawings on the new surfaces, but it appears the entire image is copied despite the small surface area. I even went so far as to 'clip' that, but it's not as expected. The Pycario documentation isn't much help.

Anyone with knowledge?

And for the interested, it's for the 'lip' manipulation section of Avatar-Facemaker thingy.
Have a few low variance maidens for your trouble, built on the above thing I'm learning/testing. Still needs lots of hair styles, noses, lips etc. Currently building them. Hopefully someone can help me with the latest issue, so I can move forward. Many Thanks.