A system to reject phone calls from my laptop

This post is about a system we devised and set up at home for me to be able to reject all the annoying phone calls I receive during the day from my laptop, without having to go pick up the phone. If you are also working from home like I do (yes, this is another cool option we have at Igalia!) you might find this hack useful. 😀

Demo:

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i965: Improved support for the ETC/EAC formats on Intel Gen 7 and previous GPUs

This post is about a recent contribution I’ve done to the i965 mesa driver to improve the emulation of the ETC/EAC texture formats on the Intel Gen 7 and older GPUs, as part of my work for the Igalia‘s graphics team.

Demo:

The video mostly shows the behavior of some GL calls and operations with and without the patches that improve the emulation of the ETC/EAC formats on Gen7 GPUs. The same programs run first with the previous ETC/EAC emulation (upper terminal) and then with the new one (lower terminal).

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Hair simulation with a mass-spring system (punk’s not dead!)

Hair rendering and simulation can be challenging, especially in real-time. There are many sophisticated algorithms for it (based on particle systems, hair mesh simulation, mass-spring systems and more) that can give very good results. But in this post, I will try to explain a simple and somehow hacky approach I followed in my first attempt to simulate hair (the mohawk hair of the video below) using a mass-spring system.


 

The code can be found here: https://github.com/hikiko/mohawk

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Claws-mail: a trick to view the patches as side-by-side diffs

One thing that I find very tiring when I read the Mesa3D mailing list for my work at Igalia , is to read the patches that arrive as emails: they are too many and the mail clients do not highlight them. So far, I was using the thunderbird mail-client with the colored-diffs plugin that made them more readable, but it was quite slow and was breaking the appearance of the e-mails that were replies to a patch. Since, I never was a big fan of thunderbird (the list of the things I disliked about it was always longer than the list of the features I liked) I wanted to find a way to have the colored-diffs and the lightning plugins functionalities to a more lightweight gui-mail-client: the claws-mail.

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A short OpenGL / SPIRV example.

It’s been a while since Igalia is working on bringing SPIR-V to mesa OpenGL. Alejandro Piñeiro has already given a talk on the status of the ARB_gl_spirv extension development that was very well received at FOSDEM 2018 . Anyone interested in technical information can watch the video recording here: https://youtu.be/wXr8-C51qeU.

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Install/Update LetsEncrypt certificates (no-root, apache2, debian)

It seems that the certbot, the recommended script to install and update the LetsEncrypt certificates requires root permissions. Well, I found several tutorials and forums where people claimed that they ran it without root permissions but they all said they needed root permissions to do something else for certbot to work and then I ran this simple command:

and decided to give up and search for an alternative method. 🙂

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Fosscomm 2017 [update: slides in English]

FOSSCOMM (Free and Open Source Software Communities Meeting) is a Greek conference aiming at free-software and open-source enthusiasts, developers, and communities. The event is solely organized and ran by volunteers (usually university students, communities, Linux User Groups) and is taking place in a different city every year. The attendance is free and everyone is welcome to make a presentation or a workshop related to free and open source projects.

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