On Tue, Mar 11, 2003 at 01:07:21PM +0100, Raphaël Quinet wrote: > On Tue, 11 Mar 2003 09:46:49 +0000, "Adam D. Moss" <adam@xxxxxxxx> wrote: > > [...] The idea > > of rehash-on-dirty would be to catch identical tiles, even > > accidentally-identical tiles (like great masses of transparent > > tiles, presuming that you scrub the RGB data of a transparent > > pixel; the row-hints stuff has been doing this and potentially > > breaking the ill-advised anti-erase feature for 100 years now > > and no-one has complained), that the normal COW routes miss. > > Hmmm... This is interesting. I didn't know that a side effect of the > row-hints would be to discard the RGB data from fully transparent > pixels. Of course, this makes sense and this is the right thing to do. > > But this also means that some plug-ins such as Noisify should > definitely never use the invisible RGB data in any operation, because > the results could be (very) different if some tiles are swapped out. > See the discussion in: http://bugzilla.gnome.org/show_bug.cgi?id=72853 Hm. Though I see the posibility to temporarily make some area transparent just to give some its parts nonzero opacity later as a useful feature, the rest of world obviously thinks otherwise ;-( Yeti
