# note: Every optional part of the lossless format in one image.
# expect: ok
# exercises: The maximal stack: all four transforms, a colour cache, an
#   entropy image selecting between two Huffman groups, and pixel data using
#   literals, a cache index and a back-reference. transform-all-four has the
#   transforms alone; this adds everything that is read after them, so the
#   header walk of DecodeImageStream() runs to its full length and the pixel
#   loop consults the entropy image, the cache and the copy path in turn.
lossless
width 16
height 16
transforms color_indexing subtract_green cross_color predictor
palette_colors 0xff102030 0xff405060 0xff708090 0xffa0b0c0
cache_bits 4
meta_bits 2
meta_tiles 0 1 1 0
code green complex
code dist complex
pixels 0x1b x31 cache 0 copy 32 2