GSoC/2018/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 may wish to contact the developers and find out more about the particular suggestion you're looking at.

Being 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 is unlikely to work out.

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 other 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)

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 support creating images from scratch from begin 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 patchs for bugs or wishes or small features. We want to know how good you are!

Project: Implement a Lockfree Hashtable for Krita's Tile Manager

Brief explanation: This is a hard-core project, only suitable for someone with deep knowledge of the problems of designing multi-threaded software. It involves Krita's core datamodel, where the tiles that compose image data are managed. the KisTileHashTable currently uses a QReadWriteLock to manage access to the tiles. This is one of the last bottlenecks when painting and recomposing the image projection. The goal of this project is to remove that lock and replace it with a lockless design. Since this touches the very core of Krita, a thorough test plan is essential.

Expected results: No bottlenecks anymore!

Knowledge Prerequisite: C++, Qt, threads, locks.

Mentor: Dmitry Kazakov (dmkitryK|log on irc)

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 opactity, 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

Mentor: Boudewijn Rempt (IRC: boud) or Dmitry Kazakov (IRC: dmitryk_log)

Project: Taking the Shape Brush to the next level

Brief Explanation: Krita has a number of interesting brush engines. One of them is the Shape Brush engine. Inspired by Alchemy, the shape brush "throws" shapes on the canvas. The current implementation is limited to geometric shapes. We want the brush engine to be extended to make it possible to load vector shapes defined as PDF or SVG and use those to draw on the canvas as well. Other improvements are the addition of Feathering, an outline mode, edge sharpening and background textures.

Expected Results: A revampted and exciting shapes brush

Knowledge Prerequisite:

• C++, Qt, Krita

Mentor: Boudewijn Rempt (IRC: boud) or Lukas Tvrdy (IRC: LukasT)

Project: Analysis of thoroughput of Krita Blending Modes and porting them to AVX2

Brief Explanation: Blending modes is the hottest piece of code in Krita. It should process gigabytes of data per second, therefore it should be extremely optimized. Some of its parts are already optimized to use AVX instructions, but some (float16 color spaces) are not. We need to port the rest of the color spaces to AVX and make a research into the possibilities of using AXV2 instructions directly (int16 instructions). It might happen that you will have to extend VC library to get full AVX support. This is another hard-core project only suitable if you have a good deal of experience.

Expected Results: Ported Float16 color spaces to AVX, extended Vc library to support int16 AVX2 instructions and adopted it in Krita

Knowledge Prerequisite: C++, SEE/AVX (read Intel's manual)

Mentor: Dmitry Kazakov (IRC: dmitryk|log)

Project: Partial canvas updates and region of interest (performance optimization for huge (20k+) canvases)

Brief Explanation: We already have an optimization for huge canvases, which is called Instant Preview. But it woks only when the user has the canvas zoomed out to fit the screen. There are some usecases, when the user wants to work with a small "working area" of a huge image and he doesn't care what happens with the rest of the image. This project is targeted to optimize this case.

Expected Results: By the end of the summer we expect these features to be implemented:

• Partial updates in openGL canvas. Right now we redraw all the image textures in every frame, which is not needed after porting to Qt5.
• Region of Intereset (ROI) in KisImage. Updates should be reordered and the priority should be given to the areas that are currently visible to the user
• Work Area Tool. The user is be able to define the area, where he would like to work in. The updates for other parts of the image are skipped until the user exits this special mode.
• (if there is time) Optimize textures loading to use RIO as well. Theoretically, we can just skip uploading of the tiles that are not visible on the screen at the moment.

Knowledge Prerequisite: C++, OpenGL

Mentor: Dmitry Kazakov (IRC: dmitryk|log), Julian Thijssen (IRC: Nimmy)

Project: Add 3D Painting Assistants

Brief explanation: One of the more innovative features in Krita are the painting assistants. These are shapes overlaid on the canvas that the artist can use to help him achieve perspective, straight lines and other shapes freehand. For complex drawings it would be useful to be able to place 3D models on the canvas, position and scale them and use those as guides for drawing.

Expected results: by the end of the summer, 3D models should be shown on canvas as canvas decorations, using OpenGL in hidden-line wireframe mode. The models should be manipulated using on-canvas controls like other assistants. Magnetic snapping is an optional extra.

Knowledge Prerequisite: C++, Qt, OpenGL, Assimp

Mentor: Julian Thijssen (IRC: Nimmy)

KDE Student Programs

KDE Student Programs is the working group responsible for running Season of KDE and managing KDE's participation in Google Summer of Code, Google Code-In, and other mentorship programmes.

Project: A new Season of KDE Website

Brief explanation: Season of KDE will need a new website to make managing the project easier for us. The core feature set that we're looking to have comprises:

• Student applications on the website
• Mentors can mark themselves interested in projects during the application phase
• Org admins will create slots and assign projects and mentors to slots
• Manage mid-term evaluations and results
• Bulk data export and import

For maintainability by the rest of KDE we'd like the app to be in Python (Tornado or a WSGI framework). It would also be nice if the app was an SPA riding on top of a REST API server so we can have command-line tools interacting with the server as well.

Expected results: Easier project administration for KDE.

Knowledge Prerequisite: Python, Tornado/WSGI, LDAP, full-stack web development, Single-Page applications.

Mentor: Boudhayan Gupta <[email protected]>, BaloneyGeek on IRC