f00n0g08 - grayscale, no interlacing, filter-type 0
f00n2c08 - color, no interlacing, filter-type 0
f01n0g08 - grayscale, no interlacing, filter-type 1
f01n2c08 - color, no interlacing, filter-type 1
f02n0g08 - grayscale, no interlacing, filter-type 2
f02n2c08 - color, no interlacing, filter-type 2
f03n0g08 - grayscale, no interlacing, filter-type 3
f03n2c08 - color, no interlacing, filter-type 3
f04n0g08 - grayscale, no interlacing, filter-type 4
f04n2c08 - color, no interlacing, filter-type 4
f99n0g04 - bit-depth 4, filter changing per scanline 