Call for contributors for Fixture [ Qt5 based raster graphics editor ]
zee at hellozee.me
Fri Sep 21 13:10:31 BST 2018
---- On Fri, 21 Sep 2018 16:28:41 +0530 Boudewijn Rempt <boud at valdyas.org> 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
> * consider color management: you cannot do anything useful unless you
> understand color management. Check out littlecms and https://poynton.ca/
> * 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 https://phabricator.kde.org/T8198#132594 -- did you
> post a patch for review and did I miss that?
This is the one you reviewed https://phabricator.kde.org/D10202
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