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Programming Leftovers

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Development
  • Notes on packaging Krita with G’MIC

    Krita 3 and later are compatible with G’MIC, an open-source digital image processing framework. This support is provided by G’MIC-Qt, a Qt-based frontend for G’MIC. Since its inception, G’MIC-Qt was shipped as a standalone, externally built executable that is an optional, runtime dependency of Krita.

    Krita 5 changes the way G’MIC-Qt is consumed. In order to support CentOS and macOS, G’MIC-Qt has been converted into a dynamically loadable library that is a dependent of Krita.

    This file reviews these changes, and how to package Krita accordingly.

  • Qt WebAssembly clipboard

    Clipboard use on desktop platforms is ubiquitous. Most people use it without thinking. Copy, Paste, and Cut keyboard strokes are in-grained into muscle memory.
    On the web, it can present security issues as someone could read or write to your clipboard without you knowing.

    Up until now, Qt for WebAssembly's clipboard was text-only and only within the app itself. Qt 6.3 will have better clipboard support between host and app but also adds copy/pasting of images.

  • Attempting to compile Shotcut video editor
  • The Numbers: Performance benefits of the new Qt Quick Compiler

    In my previous post, the history and general architecture of the new Qt Quick Compiler technology was explained. As promised there, the performance numbers are presented in this post.

  • Monetizing cross-platform use cases faster and easier with Qt Digital Advertising Platform

    Many of you have been raising the question: when will Qt provide a full framework to monetize my Qt-based cross-platform application, implementing an advertising campaign directly on my user interface?

    Now all the community and Qt users in general can start in no time implementing and managing advertising campaigns targeting cross-platform use cases. We are excited to announce that Qt Digital Advertising 1.0 has been released!

  • Ads may be coming to KDE, the popular Linux desktop [Ed: Misleading clickbait. KDE and #Qt are not the same thing]
  • Qt Launches Digital Advertising Platform To Integrate Ads Into App UIs

    The Qt Company this morning announced Qt Digital Advertising 1.0 as its new ad platform that allows for developers to easily integrate advertising campaigns into Qt-based, cross-platform applications.

    The Qt Company devised Qt Digital Advertising as a way for the community and Qt users to integrate and manage advertising campaigns within Qt-powered programs. This is a new plug-in for the Qt toolkit for managing and monetizing campaigns for any Qt-based application.

  • Parsing PNGs Differently | Hackaday

    There are millions of tiny bugs all around us, in everything from our desktop applications to the appliances in the kitchen. Hidden, arbitrary conditions that cause unintended outputs and behaviors. There are many ways to find these bugs, but one way we don’t hear about very often is finding a bug in your own code, only to realize someone else made the same mistake. For example, [David Buchanan] found a bug in his multi-threaded PNG decoder and realized that the Apple PNG decoder had the same bug.

    PNG (Portable Network Graphics) is an image format just like JPEG, WEBP, or TIFF designed to replace GIFs. After a header, the rest of the file is entirely chunks. Each chunk is prepended by a four-letter identifier, with a few chunks being critical chunks. The essential sections are IHDR (the header), IDAT (actual image data), PLTE (the palette information), and IEND (the last chunk in the file). Compression is via the DEFLATE method used in zlib, which is inherently serial. If you’re interested, there’s a convenient poster about the format from a great resource we covered a while back.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.