# note: An alpha plane back-reference at distance 2.
# expect: ok
# unique: copy8b_dist_2
# exercises: The two-byte arm of CopyBlock8b()'s pattern switch. It reads a
#   uint16_t and squares it into a word, then writes the plane four bytes at
#   a time. alph-plane-lz77 takes the distance-1 arm next to it.
chunks VP8X ALPH VP8
alpha 1
width 16
height 16
yac_qi 30
macroblock
coeffs y2 -20
alph_plane
transforms color_indexing
palette_colors 0x00000000 0x0000c800 0x0000ff00
code green complex
code dist complex
pixels 0x24 x31 0x49 copy 32 122