On Sat, Jul 22, 2023 at 01:23:39PM +0000, Taylor R Campbell wrote: > Is there a way we could just use or add a simple hook in genfb or > rasops for when there's dirty areas to update, so we don't have to > copy & paste all of that cruft from genfb and drmfb? > > It looks like a painful maintenance burden; maintaining genfb on its > own is bad enough, and there's a lot of API cleanup warranted in > genfb, rasops, and wscons.
Don't we have a "shadow" thing that does a quick access framebuffer in main ram and causes (sometimes delayed) copy back to hardware for slower graphic cards? See the comments about "shadow framebuffer" in rasops.h (ri_hwbits vs. ri_bits). It is used e.g. in dev/sbus/cgtwelve.c. Martin
