smooth panning and zooming an image, to use OpenGL or not?

I am working on a program that captures images from a still camera and displays them on the screen. One of the things the program will do is over lay the image with crop marks. The crop marks will represent different size prints.

I have found this example of how to display an image

Image Viewer Example

I also know that this can be done with OpenGL. I would like to implement nice smooth zooming and panning and I am wondering if there is an easy way to do that without resorting to using OpenGL.