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KDE: Linux App Summit 2019, Okular and Krita

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KDE
  • Bring the Linux App Summit 2019 home

    The GNOME and KDE communities are looking for locations for the Linux App Summit (LAS) 2019, an event that will be held sometime between September and December 2019.

    The Linux App Summit is an evolution of the Libre Application Summit and has a specific focus on the creation of applications that target Linux devices. By co-hosting the conference, KDE and GNOME want to create a space for a more widespread collaboration and work towards a common goal: make the Linux application ecosystem flourish.

    If you are interested in hosting LAS 2019 in your town, send us an e-mail to appsummit@lists.freedesktop.org by May 15th with your proposed location. This will allow the organizing committee to establish contact with you and give you assistance as you put together a bid later on.

  • Rajeesh K Nambiar: Okular: improved PDF annotation tool

    Okular, KDE’s document viewer has very good support for annotating/reviewing/commenting documents. Okular supports a wide variety of annotation tools out-of-the-box (enable the ‘Review’ tool [F6] and see for yourself) and even more can be configured (such as the ‘Strikeout’ tool) — right click on the annotation tool bar and click ‘Configure Annotations’.

    One of the annotation tools me and my colleagues frequently wanted to use is a line with arrow to mark an indent. Many PDF annotating software have this tool, but Okular was lacking it.

    So a couple of weeks ago I started looking into the source code of okular and poppler (which is the PDF library used by Okular) and noticed that both of them already has support for the ‘Line Ending Style’ for the ‘Straight Line’ annotation tool (internally called the TermStyle). Skimming through the source code for a few hours and adding a few hooks in the code, I could add an option to configure the line ending style for ‘Straight Line’ annotation tool. Many line end styles are provided out of the box, such as open and closed arrows, circle, diamond etc.

  • Summer is coming...

    All of this began here, probably this was the first day I was giving Krita a try cause this was the closest I got to Photoshop after switching to Linux. It has been something on and off from that day, sometimes I used Krita, sometimes I mixed it up with GIMP and Inkscape too for satisfying my needs to replace the “Photoshop through Wine”.

    Until 2017 I was just a Krita user, but after installing Gentoo and getting comfortable with compiling programs on my own, I decided to contribute to Krita, cause it feels awesome when your work is being used by millions of people, right?

    So I headed over to their IRC channel, introduced me and told them my intentions, luckily, Scott was there to help me with the things I would love to work on and in a couple of days, I made my first patch to the new Text Tool. Cool, sounds perfect, except it wasn’t cause, that branch which I committed into will probably never get merged into master, why? why? (read them quickly one after another) For the reason that, I immediately left working on that part (even though I promised that I would work) after the first commit, god knows what I was thinking, such an idiot I was.

More in Tux Machines

Graphics: Khronos Group, Radeon Software and Wayland Pains

  • Samuel Iglesias: My last VK-GL-CTS contributions
    Even if you are not a gamer, odds are that you already heard about Vulkan graphics and compute API that provides high-efficency, cross-platform access to modern GPUs. This API is designed by the Khronos Group and it is supported by a new set of drivers specifically designed to implement the different functions and features defined by the spec (at the time of writing this post, it is version 1.1).
  • Radeon Software for Linux 19.20 Brings RHEL 8.0 Support
    Quietly released last week was Radeon Software for Linux 19.20, the latest quarterly update to AMD's packaged Linux driver that consists of their AMDGPU-PRO binary driver option as well as the AMDGPU-Open packaged components using a snapshot of Mesa. Radeon Software for Linux 19.20 only has a sole change listed: Red Hat Enterprise Linux 8.0 support and any other binary compatible downstream like the yet-to-be-released CentOS 8.0. That's it in terms of the official changes but should be also pulling in a newer snapshot of Mesa and their binary OpenGL/Vulkan drivers, newer DRM kernel driver code, etc.
  • Konsole and Wayland
    Wayland needs a different mindset when you are programming, you cannot just assume things works the same way as in as X11. One of my first patches to konsole was the rewrite of the Tab Bar, and a different way to deal with Drag & Drop of the tabs. In my mind - and how wrong I was - I could assume that I was dragging to a konsole main window by querying the widget below the mouse. Nope, this will not work. As Wayland has security by default, it will not give you anything global. What if I was a spy app trying to record another one to send to NSA? Security in Wayland is much stricter, and because of that I had to redo my drag & drop patch.

Red Hat welcomes Oracle to the oVirt community

On behalf of the oVirt community, its contributors and Red Hat, we welcome Oracle to the oVirt community. oVirt is the open source component that enables management of the Linux Kernel Virtual Machine (KVM), the hypervisor for virtualized environments running on the Linux kernel. At Red Hat, we believe that upstream collaboration drives innovation, even among competitors. To this end, Red Hat has a 10+ year tenure of thought leadership, contributions and collaboration in the oVirt and KVM communities. Our development and release processes are designed to ensure that Red Hat contributions to these communities are pushed upstream so the benefits gained from our efforts are available to the community at large and available for any and all to draw from. Read more Also: IBM-Powered Supercomputers Lead Semi-Annual Rankings

Software: MapTool, Stratos and Xournal++

  • How to use MapTool to build an interactive dungeon RPG
    In my previous article on MapTool, I explained how to download, install, and configure your own private, open source virtual tabletop so you and your friends can play a role-playing game (RPG) together. MapTool is a complex application with lots of features, and this article demonstrates how a game master (GM) can make the most of it.
  • Stratos: A rich web based UI for managing and monitoring multi-cloud PaaS
    Stratos allows administrators and developers to monitor and manage SUSE Cloud Application Platform and the applications deployed to it. It supports management of multiple deployments of SUSE Cloud Application Platform and Cloud Foundry across different private and public cloud providers. It includes Prometheus for monitoring of both Cloud Foundry applications and the underlying Kubernetes environment on which SUSE Cloud Application Platform is deployed. Neil showcased the extensions to Stratos that take it beyond just a UI for Cloud Foundry to allow it to present metrics and data from Kubernetes.
  • Use Xournal++ to Take Handwritten Notes or Annotate PDFs on Linux
    Xournal++ (which goes by the package name xournalpp) is a free, open-source and fully featured note taking tool for Windows, macOS and Linux desktops. The app makes it easy to create new handwritten notes, draw diagrams and doodles, and sketch out thoughts. A variety of different paper types are available, including regular lined, squared/graph, and blank. As Xournal++ is designed for note-taking and sketching it’s best used with a graphics tablet or stylus, but you can use a regular keyboard and mouse too. Keen to learn more?

Programming: Apache's Kafka, LLVM's Clang and Google's Go

  • Building Apache Kafka Streams applications using Red Hat AMQ Streams: Part 2
    The Apache Kafka project includes a Streams Domain-Specific Language (DSL) built on top of the lower-level Stream Processor API. This DSL provides developers with simple abstractions for performing data processing operations. However, how one builds a stream processing pipeline in a containerized environment with Kafka isn’t clear. This second article in a two-part series uses the basics from the previous article to build an example application using Red Hat AMQ Streams. Now let’s create a multi-stage pipeline operating on real-world data and consume and visualize the data.
  • Clang "Interface Stubs" Merged For Offering Interface Libraries To ELF Shared Objects
    In addition to Clang-Scan-Deps being merged a few days ago, another new feature for LLVM's Clang is called the Clang Interface Stubs and brings a concept from Windows/macOS over to Linux/ELF systems. Clang Interface Stubs allows generating stub files/libraries containing the mininal information needed to build against that library. The Clang Interface Stubs can be used for limiting access to a library's internal systems or breaking up build dependencies thanks to the minimal approach.
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    Since it first appeared at Google in 2009, thousands of developers (and entire businesses) have adopted the open-source coding language Go for key software-based products and services. Designed to mimic core features of C, Go’s authors sought to maximize brevity and simplicity. Today, the language’s clarity and lack of ambiguity around its syntax makes it a favorite with developers. We spoke with technologists at five tech companies about what they’ve built in Go, and why they chose it for those particular tools and services.