How do I get the real X, Y, Width & Height when Full screen scaling?

I have a sprite (which I use as a photo, so rectangular), I then take a snapshot of the canvas and simply want to capture only the rectangle sprite (the photo).

So, most obvious choice when using "take snapshot canvas" is to set the X & Y position to the sprite X & Y, and same with the width & height (sprite width & height).

However this only works if full screen scaling is set to off, if it is anything else such as Scale Inner/Outer, then the captured snapshot is never the right place or size?

I have also tried using "photo.height*PlatformInfo.DevicePixelRatio" but still no luck, this just changes things but still not correct.

When I run in Debug mode and look at the sprite in question, the width, height and scale doesn't change regardless of the canvas scale??

So how do I get these values to get a correct snapshot??

Andy