Hi again.
I talked to Krita developer "Boud" by IRC and he said many interesting
things about linear RGB.
He said that there is no need to convert to Linear RGB. Krita does not
convert anything. It only mixes layers.
So everything is simplier. You just need to implement my patch and make
"New Overlay"/"Legacy Overlay"
for new/old XCF formats.
Entire talk:
[11:36]<boud> mifth: yes
[11:38]<mifth> i have a tlkt to gimp devs about Overlay mode. There is a
question: do you convert to Linear RGB layers before mixing and then to
sRGB/RGB16 after mixing?
[11:38]<mifth> talk*
[11:39]<boud> no -- krita users can create their images in linear rgb
and work in that mode if they want, but otherwise, everything is done in
the current colorspace
[11:39]<mifth> i mean in Krita of course
[11:40]<boud> this is different from gegl, which, afaik, always works
with 32 bit floating point linear rgb
[11:41]==thorwil[[email protected]] has joined#krita
[11:42]<mifth> For eaxmple i created an image RGB8 in Krita. Then i did
some layers with different modes. Does Krita convert RGB8 to Liner RGB
to mix layers?
[11:43]<boud> no -- if you have layers in different color models, krita
will convert those layers to the image model before composition
[11:45]<mifth> Gimp devs say that they should convert to liner RGB
before mixing layers? Are they right?
[11:45]<mifth> i'll post some their posts now
[11:45]<boud> I'm on the mailing list :-0)
[11:45]==LukasT[[email protected]] has joined#krita
[11:45]<mifth> aha cool
[11:46]<mifth> what do you think about that talk?
[11:46]<boud> it's something that one can debate... the thing is, that
yets, there are advantages. But artists often don't want the way linear
rgb works, it confuses them
[11:46]<boud> it affects the way layers are blended together, and they
are used to the non-linear system
[11:46]<boud> so krita gives people a choice: choose to work in linear
rgb, or not
[11:48]==home[~home@unaffiliated/home] has joined#krita
[11:48]<mifth> interesting..
[11:48]<boud> it also means you can easily experiment with the
differences in krita :-)
[11:49]<mifth> where can be switching to linear in Krita?
[11:49]<Bugsbane> I've just updated Krita.org to the latest version of
Joomla and it's plugins. It should all work fine, but if anyone comes
across anything weird, I'd appreciate hearing about it!
[11:49]==MrBeast[[email protected]] has quit [Read
error: Connection reset by peer]
[11:50]<boud> Bugsbane: ok!
[11:50]<boud> mifth: image/convert image type, select an scRGB profile.
[11:50]<mifth> boud: other question: Is it ok to mix layers with
different modes without convertion to linear RGB?
[11:51]<boud> yes, in krita it is
[11:51]<mifth> cool
[11:51]<boud> but afaik, krita is the only application that allows you
to have layers of different color models
[11:51]<mifth> thank you for talking
[11:51]<mifth> i'll post it to Gimp mailing list
[11:52]<boud> you're welcome
[11:52]<boud> oyvind kolas (pippin) knows how krita works, btw, but he
thinks we're doing it wrong by allowing the user that flexibility
On 13.11.2012 21:37, Michael Natterer wrote:
The problem is much bigger. Almost *all* of our layer modes
will be "Legacy", and the new modes will operate in linear
light. Just adding a hack for overlay is not going to
fix the root problem.
--mitch
_______________________________________________
gimp-developer-list mailing list
[email protected]
https://mail.gnome.org/mailman/listinfo/gimp-developer-list
