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Hi, <br>
<br>
Thanks for your work Boud about performances. I *really* appreciate
all the work that could be done in this direction. This is the most
important topic in my opinion for Krita ( this and of course
polishing existing features , as text / navigation / textures /
etc... ) I tested a before / after the change ; using a set of
rules* I'm used to do for comparing digital painting apps. I saw a
very subtle advantage in openGL ( but maybe it also comes from the
Nvidia updates ) like 1/10 better. This mainly affect brush with
smudge/dulling. For the no-openGL canvas ; I experienced no
changes. <br>
<br>
Here I also installed a dual boot with a Win7 to test performances
differences between four digital painting softwares** and Krita. The
difference is like going from 1 to 5. Watching this statement was a
bit hard, and make me sad for the slow FLOSS tools. <br>
<br>
Where all the computing effort of my hardware goes ? :-) <br>
I can't barely demo Krita on my laptop , a dual core 2Ghz , 3GB of
ram for painting smoothly a 2484x1200pixel concept art previz at 50%
of viewport. For performing this, I must use my workstation , a
icore7 2,3Ghz , with a Nvidia GT220 and 8Gb ram ; and I'm happy I
can, but it's exclude a lot of user also. <br>
<br>
Of course, I'm deeply aware than back in 2009 while doing concept
for Sintel, Krita couldn't paint smoothly on a 1000x1000px canvas
with the simpliest rounded brush***. A long and wondefull road was
made, there is not a single doubt about it, and thanks to all
developers involved into this field. But , I think you'll understand
it is reasonable to ask Krita to be five time more fast. <br>
<br>
I'm also aware than tweaking the deep engine of Krita is not a
little work , and rare people can do it. I assume it's also a no-fun
job, complex. Developer(s) on this task should be paid for to can
invest full time on it. <br>
Community could contribute around with a fund rising about that , as
in 2009 again ***.<br>
<br>
-David<br>
<font color="grey"></font><br>
<br>
( * personnal set of rules : my test is only about how it feels to
paint a sketch with various brush on a A4-300dpi ; at 25% view port
zoom , with large brush ; I repeat the test on a multiply layer ;
under the multiply layer ; merging layers speed ; and color action
as 'level' / 'hue/sat" change ... for the brush I use a simple hard
rounded with no visible 'spacing' and pressure on opacity ; and also
brush mask ; and also brushmask + dulling or smudging ; I'm used to
judge software like that ... it's a sort of my personnal calibration
to how get how a software feels. )<br>
<br>
(** digital painting softwares tested on Win7 : last OpenCanvas ,
Corel Painter 12 , SAI Tools , Photoshop CS2 )<br>
<br>
(*** 2009 story :
<meta http-equiv="content-type" content="text/html;
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<a
href="http://dot.kde.org/2009/12/02/krita-team-seeking-sponsorship-take-krita-next-level">http://dot.kde.org/2009/12/02/krita-team-seeking-sponsorship-take-krita-next-level</a>
, can't a similar fund rising be done again ?
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<br>
<font color="grey"></font><br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 08/30/2012 09:06 AM, Boudewijn Rempt
wrote:<br>
</div>
<blockquote
cite="mid:alpine.LNX.2.00.1208300905130.29681@calcifer.valdyas.org"
type="cite">Hi,
<br>
<br>
After a deep discussion last night I've pushed an experiment patch
to master that should improve painting performance a bit (not a
huge amount, but still useful). However, I really need to know
whether it causes regressions.
<br>
<br>
So, if you're using git master, please update and report on issues
when painting, especially with low opacity strokes and undo/redo
or other brushes than the pixel brush. Issues can only appear when
painting in wash mode, not build-up mode.
<br>
<br>
Thanks!
<br>
<br>
Boudewijn
<br>
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