Use pngsuite instead of pripamtopng for --transparent test
PATH=${PWD%code*}code:$PATH
-# R G B R G B R G B r g b r g b r g b R G B R G B R G B
-printf 'P6\n3 3 3\n\1\0\0\0\1\0\0\0\1\2\1\1\1\2\1\1\1\2\3\2\2\2\3\2\2\2\3' |
-pripamtopng - | pripngchunk --transparent '#000055' - | pnglsch | grep -q tRNS
+python -m pngsuite basi2c08 | pripngchunk --transparent '#FFF' - |
+ pipcolours |
+ pnglsch | grep IHDR |
+ grep -i -q 000003fd000000010806000000
