GSoC/2020/Ideas

Konqi is giving a lesson!

See also: GSoC Instructions, Last year ideas

Guidelines

Information for Students

These ideas were contributed by our developers and users. They are sometimes vague or incomplete. If you wish to submit a proposal based on these ideas, you are urged to contact the developers and find out more about the particular suggestion you're looking at.

Becoming accepted as a Google Summer of Code student is quite competitive. Accepted students typically have thoroughly researched the technologies of their proposed project and have been in frequent contact with potential mentors. Simply copying and pasting an idea here will not work. On the other hand, creating a completely new idea without first consulting potential mentors rarely works.

When writing your proposal or asking for help from the general KDE community don't assume people are familiar with the ideas here. KDE is really big!

If there is no specific contact given you can ask questions on the general KDE development list [email protected]. See the KDE mailing lists page for information on available mailing lists and how to subscribe.

Note

These are all proposals! We are open to new ideas you might have!! Do you have an awesome idea you want to work on with KDE but that is not among the ideas below? That's cool. We love that! But please do us a favor: Get in touch with a mentor early on and make sure your project is realistic and within the scope of KDE.

Adding a Proposal

Note

Follow the template of other proposals!

Project:

If appropriate, screenshot or another image

Brief explanation:

Expected results:

Knowledge Prerequisite:

Mentor:

When adding an idea to this section, please try to include the following data:

• if the application is not widely known, a description of what it does and where its code lives
• a brief explanation
• the expected results
• pre-requisites for working on your project
• if applicable, links to more information or discussions
• mailing list or IRC channel for your application/library/module
• your name and email address for contact (if you're willing to be a mentor)

• • Ideas with no mentors listed and their contact info will be removed **

If you are not a developer but have a good idea for a proposal, get in contact with relevant developers first.

Ideas

Your Own Idea

Project: Something that you're totally excited about

Brief explanation: Do you have an awesome idea you want to work on with KDE but that is not among the ideas below? That's cool. We love that! But please do us a favor: Get in touch with a mentor early on and make sure your project is realistic and within the scope of KDE. That will spare you and us a lot of frustration.

Expected results: Something you and KDE loves

Knowledge Prerequisite: Probably C++ and Qt but depends on your project

Mentor: Try to see who in KDE is interested in what you want to work on and approach them. If you are unsure you can always ask in #kde-soc on Freenode IRC.

Krita

Krita: digital painting for artists. It supports creating images from scratch from beginning to end. Krita is a complex application and developers need to have a fair amount of experience in order to be able to do something.

Krita is a widely used digital painting application for professional artists. Last year, Krita gained the ability to create hand-drawn 2D animations, among other new features. For this year, projects that the Krita team would be interested in include the following ideas.

Note that we're always open to ideas you bring in yourself: if you're passionate about something you've come up with yourself, that you want for Krita, that's a big plus for us.

We also expect prospective students to submit at least three patches for bugs or wishes or small features. We want to know how good you are! See https://phabricator.kde.org/T7724 for some smaller tasks that you could work on that are not bugs.

Talk to the team in IRC (freenode): #krita or via the mail list: https://mail.kde.org/mailman/listinfo/kimageshop

Project: Integrating the MyPaint Brush Engine

Brief Explanation: The MyPaint brush engine has been separated from the MyPaint application and has been completely rewritten. Artists still like the mypaint brush engine a lot and it would be great to have the engine integrated in Krita as a new brush engine. Libmypaint can be found here: https://github.com/mypaint/libmypaint and the brush set here: https://github.com/mypaint/mypaint-brushes . The first goal is to integreate libmypaint in a Krita brushengine and make it load the brushes. The second goal is to expose the MyPaint brush options in Krita's brush editor and allow the modification and creation of MyPaint brushes in Krita. GIMP is an example of an application that has already integrated the MyPaint brush engine.

Expected Results:

Artists should be able to effectively paint with MyPaint brushes in Krita.

Knowledge Prerequisite:

• C, C++, Qt, Krita

Mentor: Boudewijn Rempt (IRC: boud)

Project: Supporting Vertical Text and SVG2 Text in the Text Shape

Brief Explanation: Krita's Text Shape was rewritten for Krita 4.0. It is now SVG based, instead of ODF. There are many things lacking, though. The original goal was to support SVG2. Currently the text shape only supports SVG1. There is no automatic wordwrap and vertical text (e.g. Chinese and Japanese) is not supported either. The goal of this project is to support wordwrap and vertical text layout. Other improvements to the text shape can be proposed as well. The level of this project is advanced.

Expected Results:

Artists should be able to create and edit vertical text. Text shapes should be able to automatically wrap text to the bounding box.

Knowledge Prerequisite:

• C, C++, Qt, Krita, SVG, Typography, Text Layout

Level Advanced

Mentor: Boudewijn Rempt (IRC: boud)

Project: Add New Fill Layer Types

Brief Explanation: Fill layers are layers that automatically generate content. Krita currently has two types of fill layers: Color and Pattern. There used to be another type that generated content dynamically using the OpenShiva scripting language. However, that language hasn't been maintained for a long time. The goal of this project is to add a new dynamic fill layer types that could fill an area with different effects such as perlin and other types of noise, clouds, hatching, fractals.

Expected Results:

Several new fill layer types that allow the user to add dynamically generated content as a layer in the layer stack

Knowledge Prerequisite:

• C, C++, Qt, Krita

Level Medium

Mentor: Boudewijn Rempt (IRC: boud)

Project: Improve Krita for Touch Systems

Brief Explanation: Krita Gemini/Krita Sketch were version of Krita based on QtQuick 1 that provided a decent touch-only experience. Because of the technical limitations of QtQuick 2, the approach used in Gemini and Sketch is no longer viable. Since Krita 4, there is a QtQuick2 based touch docker that mimics the button bar found on some wacom devices. This is not configurable, and quite limited. This project involves working with Krita's UX designers and users to define a new approach to supporting touch devices, then implementing that support.

Expected Results:

Artists should be able to work with Krita on a touch-only device such as a Surface Pro or Wacom Mobile Studio without wanting to chop their devices in two.

Knowledge Prerequisite:

• C, C++, Qt, Krita

Level Medium

Mentor: Boudewijn Rempt (IRC: boud)

Project: SVG Mesh Gradients

Brief Explanation: Even though Mesh Gradients are not officially part of the truncated SVG2 specification anymore, having a second implementation next to Inkscape would help improving the standard. Plus, mesh gradients are very useful for artists. This project entails implementing a new gradient type. Whether this should be based on QGradient or not is up for discussion. The gradients should render exactly the same as in inkscape. See https://svgwg.org/svg-next/pservers.html#MeshGradientElement.

Expected Results:

A new gradient type, UI to create and edit these gradients and apply them. Gradients should work both on vector objects as well as on paint layers.

Knowledge Prerequisite:

• C, C++, Qt, Krita, SVG, Inkscape

Level Advanced

Mentor: Boudewijn Rempt (IRC: boud)

Project: Extending Animation Support for curves

Brief Explanation: In Krita, you can already add curves that could be applied to some properties of a layer, like opacity, animating those properties. We want the animation support extended by allowing users to place masks (filter masks, transformation masks, transparency masks) on the timeline and animate their properties using curves. Every property of a layer or mask placed on the timeline should be animatable.

Expected results:

• Implementation of a gui for applying the curve settings to one or more properties of a mask or layer
• Implementation of the actual rendering of the properties in the frames
• Saving of these settings

Knowledge Prerequisite:

• C++ and Qt

Level Advanced

Mentor: Jouni Pentikainen (tyyppi on IRC)

Project: Adding support for high-channel depth brush tips

Brief Explanation: Currently, brush tips are 8 bits and based on QImage objects. With the advent of 16 bit/channel and 32 bit/channel support in QImage, we can start supporting higher bit depth brush tips. The 16 bit/channel GBR format from Cinepaint is not so relevant: we should support EXR and PNG for predefined brush tips and extend the autogenerated brush tips to support higher channel depths as well.

Expected results:

• A gui to select the channel depth when creating brush tips
• Loading of high-channel depth brush tips
• Support for high-channel depth brush tips when painting

Knowledge Prerequisite:

• C++ and Qt

Level Advanced

Mentor: Jouni Pentikainen (tyyppi on IRC)

Project: Extend Arrange Docker to support alignment and distribution of Layers

Brief Explanation: Currently, the arrange docker only supports aligning and distributing vector objects of a singlet vector layer. This project aims to extend the arrange docker support for Layers too.

Expected results:

• All the current operations available in Arrange docker could be done with the layers.

Knowledge Prerequisite:

• C++ and Qt

Level Easy

Mentor: TBD

digiKam

digiKam is an advanced open-source digital photo management application that runs on Linux, Windows, and MacOS. The application provides a comprehensive set of tools for importing, managing, editing, and sharing photos and raw files.

• digiKam project web site
• Mailinglist
• LinkedIn Group
• #digikam IRC channel on Freenode

Project: DNN based Faces Recognition Improvements

Brief Explanation: With GSoC 2019, we have proposed a project to implement an AI extension to the digiKam core face recognition. The project has used the C++ OpenCv Deep Learning Module to detect and recognize faces with success. The project need to be continued as recognition mechanism need faces clustering management to improve results while automatic face tags assignments.

In parallel the Faces Detection and Faces Recognition and codes from digiKam core need to be hosted as plugins to be able to extend this features later (to detect and recognize animals, monuments, plants, etc...)

Expected Results:

Improve the Face Recognition workflow using clustering and open the recognition architecture with plugins for future extensions. Implement unit tests, and code documentations.

Knowledge Prerequisite:

• C++, Qt, OpenCV, Neural Network

Level Advanced

Mentors: Maik Qualmann ([email protected]), Thanh Trung Dinh ([email protected]), and Gilles Caulier ([email protected])

Project: Faces Management workflow improvements

Brief Explanation: digiKam provide a Faces detection algorithm which work mostly in 80% of use cases. It detect faces position in image automatically and register these information in database. Event if a lots of tasks can be done in background by digiKam, the end-users needs to adjust, re-organize, rename, delete Face tags in database through the user interface.

Since many year, a lots of improvements have been identified by digiKam users community to improve the face tags management workflow in graphical use interface. See this list of bugzilla entries for details

Note: Face Recognition is another part of Faces management, but this project is concerned by algorithms used while recognition.

Expected Results:

Provide a better Face Tags management workflow in user interface, with unit test, and documentation.

Knowledge Prerequisite:

• C, C++, Qt, User interface, digiKam

Mentors: Maik Qualmann ([email protected]) and Gilles Caulier ([email protected])

Project: Factoring all Export Tools with new Export API and port to QtNetworkAuth

Brief Explanation: With GoSC 2018, we proposed a project to implement a huge factorization and improvements with all digiKam export to web service plugins. Our student fixed plenty of code using OAuth version 2 authentification through libo2 library, has simplified classes, and started to write a new API to factorize all these tools, including a common Wizard dialog. Even if the export tools implementation are now better, they do not use the new API and always run as a stand alone session in digiKam core. Due to this fact, the Web Service tools are not yet usable in digiKam Batch Queue Manager as single step runnable at end of a queue processing. So the section of code about factored export tools API is currently disabled in digiKam core. This year, the project will be to fix that and to migrate libo2 dependency to the new QtNetworkAuth framewwork.

Expected Results:

Start to use every the new export tools API, use the new Wizard dialog, factoring codes everywhere, port to QtNetworkAuth, and introduce all export tools to BQM. Write unit tests, and documentation.

Knowledge Prerequisite:

• C++, Qt, Oauth2

Mentors: Mohamed Anwer ([email protected]), Maik Qualmann ([email protected]) and Gilles Caulier ([email protected])