# note: A palette-coded alpha plane whose red code carries two symbols.
# expect: ok
# exercises: The Huffman half of Is8bOptimizable(), which asks that the red,
#   blue and alpha codes each hold a single symbol so their bits can be
#   skipped entirely. Here the packed pixels vary in a channel the palette
#   lookup never reads, which costs the plane its 8-bit path for nothing:
#   the alpha that comes out is the same as alph-plane-palette's, decoded
#   the long way.
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
argb 0x00002400 x32 0x00012400 x32