filter changing per scanline, grayscale, 4 bit filter changing per scanline, grayscale, 4 bit
no filtering, colour, 8 bit
no filtering, grayscale, 8 bit
filter 3, colour, 8 bit
filter 3, grayscale, 8 bit
filter 2, colour, 8 bit
filter 2, grayscale, 8 bit
filter 1, colour, 8 bit
filter 1, grayscale, 8 bit
filter 0, colour, 8 bit
filter 0, grayscale, 8 bit
basn0g01 - black & white
basn0g02 - 2 bit (4 level) grayscale
basn0g04 - 4 bit (16 level) grayscale
basn0g08 - 8 bit (256 level) grayscale
basn0g16 - 16 bit (64k level) grayscale
basn2c08 - 3x8 bits rgb color
basn2c16 - 3x16 bits rgb color
basn3p01 - 1 bit (2 color) paletted
basn3p02 - 2 bit (4 color) paletted
basn3p04 - 4 bit (16 color) paletted
basn3p08 - 8 bit (256 color) paletted
basn4a08 - 8 bit grayscale + 8 bit alpha-channel
basn4a16 - 16 bit grayscale + 16 bit alpha-channel
basn6a08 - 3x8 bits rgb color + 8 bit alpha-channel
basn6a16 - 3x16 bits rgb color + 16 bit alpha-channel
basi0g01 - black & white
basi0g02 - 2 bit (4 level) grayscale
basi0g04 - 4 bit (16 level) grayscale
basi0g08 - 8 bit (256 level) grayscale
basi0g16 - 16 bit (64k level) grayscale
basi2c08 - 3x8 bits rgb color
basi2c16 - 3x16 bits rgb color
basi3p01 - 1 bit (2 color) paletted
basi3p02 - 2 bit (4 color) paletted
basi3p04 - 4 bit (16 color) paletted
basi3p08 - 8 bit (256 color) paletted
basi4a08 - 8 bit grayscale + 8 bit alpha-channel
basi4a16 - 16 bit grayscale + 16 bit alpha-channel
basi6a08 - 3x8 bits rgb color + 8 bit alpha-channel
basi6a16 - 3x16 bits rgb color + 16 bit alpha-channel
bgyn6a16 - 3x16 bits rgb color, alpha, yellow background chunk
bgwn6a08 - 3x8 bits rgb color, alpha, white background chunk
bggn4a16 - 16 bit grayscale, alpha, gray background chunk
bgbn4a08 - 8 bit grayscale, alpha, black background chunk
bgan6a16 - 3x16 bits rgb color, alpha, no background chunk
bgan6a08 - 3x8 bits rgb color, alpha, no background chunk
bgai4a16 - 16 bit grayscale, alpha, no background chunk, interlaced
bgai4a08 - 8 bit grayscale, alpha, no background chunk, interlaced
