Call for contributors for Fixture [ Qt5 based raster graphics editor ]

Scott Petrovic scottpetrovic at
Fri Sep 21 15:23:02 BST 2018

One thing that helps Krita is it has focus on who they are helping (people
that can draw and paint). Photoshop caters to a lot of different industries
- which is why it has 1,000 features built into it (which is both good and
bad). When you get feedback from people, they oftentimes don't tell you
important information about who they are. Are they graphic designers, web
designers, photographers, 3d texture artists, animators, or maybe beginners
just trying to get into basic image editing like cropping. You need to find
out who you are trying to help. Graphic designers don't normally do
painting and illustrations, and web designers don't usually do animation.
This is why pretty much everyone only uses 2-3% of all the features in
Photoshop. The rest of the features are just useless to them and are UI

Trying to do a 1:1 copy of Photoshop isn't a good direction. That program
has had 30 years to add a giant amount of features that have turned it into
the powerful/bloated software that it has become. As a UI/UX person, I
would focus on finding the people you want to help, learn about them, and
give them a product that they are excited about.

On Fri, Sep 21, 2018 at 7:10 AM Kuntal Majumder <zee at> wrote:

> Hey,
>  ---- On Fri, 21 Sep 2018 16:28:41 +0530 Boudewijn Rempt <boud at>
> wrote ----
>  > Using QGraphicsItems for layers is not an approach that's going to work
> out.
>  > It will not perform, it will not allow you to go beyond 8 bits sRGB and
> it
>  > will take too much memory.
>  >
>  > If you insist on starting from scratch, and I understand the
> temptation, you
>  > should:
>  >
>  > * consider color management: you cannot do anything useful unless you
>  > understand color management. Check out littlecms and
>  > ColorFAQ.html.
>  >
>  > * develop a structure for storing (including swapping), modifying and
>  > retrieving raster data. QGraphicsView actually is a tile engine, but
> you're
>  > not using it that way. Its level of maintenance in Qt is also low.
>  >
>  > * develop a system for undo/redo -- Krita uses Qt's system for that,
> but if
>  > you want to clone photoshop, you should consider using their system.
> There's a
>  > presentation from an Adobe engineer at a C++ conference in Moscow that
> should
>  > help you form an idea. But basically, every modification results in a
> shallow
>  > clone of the document. You will need this to clone photoshop's history
> brush.
>  > Google for it, I cannot find the presentation right now.
>  >
>  > Then you can start on implementing a real canvas and a tool system.
> Thanks for the pointers, at least I won't be clueless like before.
>  > I only remember you from --
> did you
>  > post a patch for review and did I miss that?
> This is the one you reviewed
> Thanks
> Kuntal M
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