atf2png-c

Uncompress ATF v6 file to png.
But it just can export ETC1 pkm file now.

###Format support:

1. ATFRAWCOMPRESSEDALPHA

###Usage:

$ make
$ ./atf2png path_to.atf  # export output.pkm and output_alpha.pkm

mergetool

Merge two png files into one.

###Usage:

mergetool -i inputdir -o outputdir