Cropped image is scaled to canvas size

[kpauly2]

The current behavior is that the cropped image is sourced from the rendered image within the canvas, meaning that the original images size is lost in the resulting cropped image.

This doesn't work for my use case, in which I'm expecting the original, very large, image to be cropped without scaling the image itself.

I think there should be an option to support cropping the original image itself, maintaining all the original size data, by scaling the crop rect to the original image dimensions.