# note: A partial frame that asks to be cleared away after it is shown.
# expect: reject
# anim: ok
# info: ok
# exercises: disposal_method 1 is DISPOSE_BACKGROUND: once frame 2 has been
#   handed out, ZeroFillFrameRect() clears just its rectangle out of the
#   canvas the next frame starts from, so frame 3 sees frame 1 everywhere
#   except that hole. Frame 3 is opaque and full-canvas, so it overwrites
#   all of it anyway -- what is being pinned is that the clearing does not
#   reach past the rectangle.
alpha 1
frame
frame_duration 100
lossless
width 32
height 32
argb 0xff102030 x1024
frame
frame_x 4
frame_y 4
frame_duration 100
disposal_method 1
lossless
width 16
height 16
alpha_is_used 1
argb 0x80ff0000 x256
frame
frame_duration 100
lossless
width 32
height 32
argb 0xff00ff00 x1024