fourcchack=
case "$tool" in
compressonator-dxtc)
+ # we still have to preprocess the image to premultiply alpha, as it seems
+ case "$format" in
+ dxt2)
+ fourcchack=DXT2
+ format=dxt2
+ ;;
+ dxt4)
+ fourcchack=DXT4
+ format=dxt4
+ ;;
+ esac
;;
*)
case "$format" in