GNOME and KDE: GNOME Shell and Mutter, Qt, Plasma Mobile and Okular for Debian
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GNOME Shell + Mutter See Changes For Tracking Software Rendering, VNC To Toggle Animations
GNOME Shell and Mutter saw a set of patches land today for GNOME 3.36 that have been around for a few months and deal with the tracking of software rendering and VNC usage where GNOME Shell should in turn disable animations to ease the rendering workload.
The GNOME Settings Daemon has until now been responsible for controlling the animation heuristics when they should be disabled while now Mutter has added support for tracking software rendering situations and in turn GNOME Shell is relying upon that for determining when to disable desktop animations.
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How not to lose the alpha channel
Working on color imagery for QiTissue recently, I realized we were accidentally losing the alpha channel in multiple places. For efficiency reasons, we keep colors in memory using the QRgb type, and convert that to/from QString for serialization purposes via QColor as needed. Here’s what I discovered about why that doesn’t work, and some ways I fixed it.
Firstly, be aware there is no QRgba in the Qt API . There is only QRgb, for 8bit color channels. It can hold an alpha value too, despite the lack of a trailing a in the type name. Then there is QRgba64 which uses 16bit per color channel. For our purposes, 8bit per channel is sufficient. So where do we lose the alpha channel, when QRgb can store it in principle?
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Fosdem and Plasma Mobile Sprint
From January 31st to February 8th I went on a little tour, first at the two days of Fosdem in Brussels, then to Berlin for a KDE sprint about Plasma Mobile.
It was the first time i went to Fodem: it’s an awesome experience, even tough big and messy: which is the awesome of it… and the bad of it at the same time
Even tough there were 800 talks I didn’t attend that many, some about the Elixir language, some about retrocomputing, some about iot stuff. At Fosdem the best thing to do there.. is meeting a lot of interesting people, rather than attending talks, which are very interesting never the less, which you can find videos here.
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Norbert Preining: Okular update for Debian
The quest for a good tabbed pdf viewer lead me okular. While Gnome3 has gone they way of “keep it stupid keep it simple” to appeal to less versed users, KDE has gone the opposite direction and provides lots of bells and knobs to configure their application. Not surprisingly, I am tending more and more to KDE apps away from the redux stuff of Gnome apps.
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