Currently only fbbootlogd and fbcond make use of support for multiple
damage areas and they are not all that performance critical anyway.
Orbital always passes a single damage area per write call. Out of all
graphics drivers we have and are likely to get only vesad could
potentially benefit from fine-grained damage areas. This commit doesn't
significantly impact performance of fbcond.
It is quite likely that the next graphics API won't be the last one and
as such would become a legacy API too. Consistently using version
numbers makes it easier to refer to the exact version you mean.
While for now this for now only includes helpers for the current limited
display interface which is relatively simple to implement manually, in
the future we will likely need a more complex interface with gpu drivers
that would be hard to get right without a common crate proving the
interface.
bjorn3