Based on wiki DDS could be compressed and uncompressed.
Now I'm trying to figure out how to achive converting png
to dds
without compression.
Regular converting could be achived with
convert file.png out.dds
It looks like you found a missing feature in ImageMagick. This is now only supported:
convert file.png -define dds:compression=none out.dds
But the following should work:
convert file.png -compress none out.dds
I just pushed a patch to the ImageMagick repository to add support for the -compress
option that will be available in the next release.