<?xml version="1.0" encoding="UTF-8"?>
<image size="400x400">
  <read filename="image.gif" />
  <get width="base-width" height="base-height" />
  <resize geometry="%[dimensions]" />
  <get width="width" height="height" />
  <print output="Image sized from %[base-width]x%[base-height] to %[width]x%[height].\n" />
  <write filename="image.png" />
</image>