Does anyone know of a command-line tool in Linux that can convert images to DDS? (Preferably with support for SGI images). Something along the lines of nvDXT would be nice, but that's Windows only.
The only thing I can find is a plugin for the GIMP. If there's a way to automate the task using GIMP so that it can be called as part of a make process, that would be semi-acceptable also.