Pekka Paalanen authored Jul 22, 2022 and Pekka Paalanen committed Sep 23, 2022

This will make sure that backends do not forget to tell us about
resizes.

composite_*() functions still read the size from the destination buffer,
because pixman_output_state is not available there.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>