I've searched high and low but I cant find a function that returns the original size in pixels of a PImage.

I'm loading an image using loadImage and i need to place it within a defined area but I don't want it to be distorted, so I think i need to know the original dimensions of the image to map them and place it within the desired area but keeping the original proportions (width/height ratio). 

Any ideas on how to achieve this?

Many Thanks

Nausk!