# note: A predictor transform on a one-row image.
# expect: ok
# exercises: Only the y_start == 0 shortcut runs (lossless.c:223): the first
#   pixel takes mode 0 and the rest mode 1, so the tile modes are never
#   read.
lossless
width 16
height 1
transforms predictor
predictor_tiles 7 7 7 7
code green 0x11
code red 0x22
code blue 0x33
code alpha 0x44