joomla/joomla-platform — pull request #1130 by romacron (2012-04-06 17:30:59+00:00)
Title: images scaled by Edge

In Order to force image scaling to an specific Edge we had decided to set for an width or an height an (int)0.
In example you want to transform an image to width=200px you must set the height (the opposite Value) to 0
so you are able to resize an imageStack with same matching Edges.