sponsored work for Dmitry

[Sven Langkamp]

On Sun, Sep 16, 2012 at 8:02 PM, Lukast dev <lukast.dev at gmail.com> wrote:

> Hello,
>
> I propose fixing bugs related to canvas, layers and masks or basically
> any crash or major bug or old bug fixed is a win.
> E.g.
> 284060  krita   general dimula73        NEW     NOR     longs strokes
> become progressively slower
> 289915  krita   general krita-bugs-null NEW     NOR     Krita's Canvas
> produces
> subtle artifacts on incremental updates
> ..and there are more.
>
> For performance Dmitry could explore the possibilities of bitBlitting
> in threads in a way where threads don't step on each other toes e.g. with
> tools?
> Sven did some work here but Dmitry has knowledge about strokes
> framework, which might
> help him.
>

I think a major improvement could be to vectorize the composite op code.
That does need more threads and should give a similar speed boost. The task
isn't trivial as our memory layout isn't optimal for that, so that will
require some work.

For strokes we really need some simplyfication, I think. There are lots of
classes that interact is some way there and maybe we need to reevaluate
some of the original requirements. Beside that we should keep in mind that
at some later point we need that macro/command system that we dicussed some
time ago and it should fit together.


> From the painting bugs area: I did not find solution for correct speed
> sensor, there
> are multiple bugs in bugzilla about it's behaviour.
>
> About the memory footprint, transform tool has this bug
> https://bugs.kde.org/show_bug.cgi?id=263170


I don't think we should concentrate on random bugs, but rather some bigger
complex that needs improvements. Maybe have three or four big topics that
take about a month each.

These could be grayscale mask, fixing the canvas, finishing strokes
framework, reducing memory footprint or improving painting performance.



>
> That's all I have on mind currently :)
>
> Lukas
>
> 2012/9/14 Boudewijn Rempt <boud at valdyas.org>:
> > Hi,
> >
> > We're looking at a new period of about 4 months of sponsored work for
> > Dmitry, so Dmitry and I were trying to create a planning, a list of the
> most
> > urgent issues.
> >
> > Here's our list as it stands now:
> >
> > 1) Grayscale masks
> > 2) Finish porting all tools to the strokes system
> > 3) Start thinking of a way to reduce krita's memory footprint.
> >
> > However, we'd like some input from y'all on what is currently blocking
> > productivity most, so we can review those issues for our planning :-)
> >
> > Boudewijn
> > _______________________________________________
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