Hi there,

I'm working on a project for unit testing that takes screenshots of specific nodes for a before/after comparison and want to use ImageMagick's compare CLI functionality, but I'm not really sure how to go about it. I've looked through imageapi_imagemagick.module for hints on how it's interfacing with the CLI, but haven't figured out any ways to do my own CLI stuff. Any tips on how I can go about adding this (for contrib when finished, of course)?

Here's the IMv6 info on Compare: http://www.imagemagick.org/Usage/compare/
and here's a thread that gives an example of what I want to do (the percentage diff value thing):
http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=15767

Thanks!
-pl