2011
08.10

If you’re a fan of traditional progressive metal, you might want to check out Lost in Thoughts debut album: Opus Arise.

Released April 29th this year, Opus Arise features some very solid songwriting much in the style of Dream Theater and similar bands. The musicianship is generally excellent, and the production is stellar. On the downside, this is not a very original album by any measure, you will not find too many fresh ideas or expressions in this album. So if you’re looking for something that takes progressive metal in a new direction; look elsewhere.

Here is the opening track, Beyond the Flames.

My favorite tracks include the slower Blood Red Diamond and the kicking closing track Assimulate, Destroy. You can find the album on Amazon.

Sadly the band had a car accident on their first European tour in late May, which left the drummer with a broken leg and having to undergo surgery. A news post comment from the drummer, and a recent interview seems to indicate that the recovery so far is going OK. Hopefully he will be fully recovered, back to playing drums, soon.

A friend told me that I should blog about music again. This was a shot at doing just that.

2011
07.22

We in the the organizing team have now published the schedule for pre-registered Workshop & BoF sessions at the Desktop Summit 2011 in Berlin.

There is still time to register for ad-hoc sessions, and we will have two dedicated “hacker rooms” where you can sit down with like-minded people and work on what you like!

See the webpage for more information.

 

2011
06.20

As a member of the local organizing team for the Desktop Summit 2011 in Berlin, I’m glad to say that you can now register your workshop or BoF session. These sessions take place during the last 3 days of the conference, and complement the presentations that take place during the 3 first days: The Workshops & BoFs sessions are hands-on sessions where people get together to discuss and work on issues face to face.

Short excerpt from the news entry on the webpage:

All forms of hands-on activities that aim to further the Free Desktop are welcomed. Examples of such sessions include BoF, project and cross-project meetings, workshops, hacking sessions and training/teaching sessions. Each session is self-organized and it is up to the hosts and participants to decide if the session is to be loosely oriented around a set of topics, or have a well-defined agenda.

The organisation committee would like to schedule as many of these sessions beforehand as possible. We expect over 1000 visitors and scheduling helps to ensure minimal overlap with other sessions and allows us to provide a clear timetable for the visitors.
The remainder of the rooms will be scheduled via the wiki but we urge you to pre-register and get a proposal in before the deadline, July 3rd!

I will be proposing a session or two of my own very soon, I suggest you do the same! Use this link

2011
06.10

One of my goals for this year was to give a presentation at a conference. And I can now say that I have achieved that goal.

I gave a talk about MyPaint at Libre Graphics Meeting 2011 in Montreal, Canada: MyPaint – the past, the present and the future.

Get the Flash Player to see this player.

Download in Ogg/Theora

I will also be giving a lighting talk at the DesktopSummit in Berlin about OpenRaster. It looks like this will be on August 7th at 14.00, but you should of course come for the whole week. Just look at the awesome program!

 

2011
06.09

In Maliit input methods are implemented as plugins. This flexibility is important because it allows the same framework to provide very different text input methods, without us having to implement them all. Different virtual keyboards, hardware keyboard input, handwriting, speech-to-text, input methods for accessibility, et.c. are all possible with the Maliit framework. This makes the input method plugin API the most important extension point.

To make it simple to start developing an input method for Maliit, we have written a set of example plugins that can be used as a skeleton* for a new input method. There is one “Hello World” example showing the C++ interface, and one showing the newly added QML interface. The latest documentation for the framework in HTML format is also included, along with a simple test application. How to get started is documented on our wiki page: Go!

A very conventional example: An input method that allows you to input "Hello World"

A nice thing is that these examples are in our framework repository: built as part of the standard build, with simple tests run as part of our test-suite. This ensures that the examples stay up-to-date and working, something I find that step-by-step, code-and-talk tutorials in some documentation repository/directory typically do not.

If you want to look at real-life examples of plugins, check out the Meego Keyboard code (C++), the Meego Keyboard Quick code (QML), or foolegg from maemo.org’s cute-input-method code (QML with Pinjyin support!). Also make sure to check out Michael Hasselmanns talk at the Meego Spring 2011 Conference: Developing custom input methods for Meego.

If you hit any issues, contact us through one of our communication channels.

* Note that currently the license of the examples is LGPLv2 like the rest of the framework.

2011
05.21

Gegl is an image processing framework used in projects like Gimp and DarkTable. It will eventually allow Gimp to allow non-destructive, high bit-depth image processing, among other things. And GStreamer is the multimedia framework for GNU/Linux, handling video/audio/other playback/recording/manipulation on your favorite desktop/server/mobile/embedded system.

After writing the Cairo overlay GStreamer element, I implement a basic GStreamer element which allows you to apply a filter to video in a GStreamer pipeline using Gegl. Using this element, video editing/manipulation applications like Pitivi could allow users to apply effects provided by Gegl to videos. Gegl is a very powerful image processing framework, and already has a significant number of image processing operations. More operations is expected, especially from the port the tools, filters and plugins used in Gimp to Gegl.

Here are some screenshots showing the standard GStreamer video test data being manipulated in different ways using Gegl. Note: the size of the images are only different because the output windows had different sizes when I took the screenshot.

Top left: original video. Top right: color temperature adjusted from 6500 to 9000 K Bottom left: inverted colors. Bottom right: inverted colors and black-white threshold

Top left: original video (no-op). Top right: color temperature adjusted from 6500 to 9000K. Bottom left: inverted colors. Bottom right: inverted colors and black-white threshold conversion

A bug has been filed for inclusion of this element into gst-plugins-good. The patch attached there also contains an example application, showing how to use the element.

In the patches you will find an example.

2011
04.29

Maliit (also known as Meego Input Methods) has the following overall goal: “to be the input method project for MeeGo and other GNU/Linux-based embedded/mobile platforms”.

This initial video shows Maliit running in Gnome 3, and demonstrates some of the very basic features provided by Maliit and the standard keyboard shipped with it. The demo is done on a WeTab tablet running a standard Fedora 15 Beta, with the latest Maliit software installed. Jan Arne Petersen is working a bit on  Fedora packages, so hopefully it will soon be easy to install for those who are interested.

Some more info about the features shown in above video:

0. Theming. Using the theming support in the standard Maliit keyboard, it is easy to go from a mockup to ready implemented theming. This theme was based on the mockup from live.gnome.org (by Jakub Steiner I believe?) and done by Michael Hasselmann in a couple of hours. He also has a blogpost on how the theming system works.

1. Typing text.This is of course the number one feature of an on-screen keyboard. There are some essential best-practice and some tricks used in Maliit to be able to get really good reponse time and typing speeds. I hope we will have some blogposts about that soon.

Typing speed can be further enchanced by enabling multitouch support (not working out-of-the-box in Fedora due to missing support further down the stack), or by installing a prediction/correction engine. User feedback can be enchanced with audatory and tactile feedback (requires hardware and driver support obviously).

2. Different languages/layouts, and switching between them. Maliit comes with layouts for over 20 languages, tested and tweaked by usability experts. Latin, Cyrillic, Arabic and Chinese based scripts are covered. The layouts are defined by XML files, so one can easily change them if wanted.

Chinese ZhuyinRussian

Arabic

For more of the features offered by Maliit framework and standard keyboard, see the wiki page. If you are interested in improving Maliit, or its integration in Gnome 3 or other GNU/Linux environment, join the irc channel or mailing list.

Next up; the importance and difficulties of input method integration on touch enabled devices.

2011
03.16

So, it is confirmed, I’m going to LGM 2011! I was at LGM last year, and I expect this year to be just as good. Hopefully I’ll also be giving a talk this time, about MyPaint and/or OpenRaster.

If you are interested in free and open source graphics software, or the production of freely licensed graphical works, you should go too! See the press release for more information, or go straight to submit a talk proposal. If you cannot be there but still want to show your support, please consider donating.

I guess this means I should order the tickets soon…

2011
03.03

I wrote the initial version of this in late January, and after some interations it was merged yesterday to gst-plugins-good, and will be in gst-plugins-good 0.10.33. This solves the feature request I filed in 2009, one of my oldest bugreports in bugs.gnome.org!

What does it do?

cairooverlay allows you to draw arbitrary things on top of a video stream in GStreamer using Cairo. Previously you had to create a custom GStreamer element for that (in C/Vala), but now you can just hook up to some signals, using any programming language with GStreamer/Cairo bindings.

To draw an overlay using this element, you use the “caps-updated” signal to get information about the video stream (like width and height) and the “draw” signal to do the actual drawing. In addition to the Cairo context, the draw signal passes you the timestamp and duration of the buffer, so you can also do animations.

For more info see the included example application or the documentation (should be updated soon). Here is the obligatory screenshot showing the example application drawing a heart onto a test videostream:

GStreamer + Cairo = <3

The heart is actually animated, so I guess I should have had a video. But you’ll just have to trust me that it is very cute, or grab the code yourself!

2011
02.12

Last weekend I was in Brussels for my first FOSDEM.

Friday I attended a planning meeting for this years Desktop Summit. Several things were on the agenda, the most pressing being the website and the call for papers which both should be finished in the coming month. I was tasked with organizing the call for BoF/meetings/devrooms. In a broader scope, I see my role as making sure relevant non-KDE and GNOME projects know they are welcome. People involved in such projects are welcomed to submit talk proposals, or apply for space for a BoF/meeting just like a KDE/GNOME project, but for anything to come out of it we need to communicate this properly.

Didn’t go to a lot of talks, but I had plenty of good discussions in the “hallway track” and in the evening events. Especially good was meeting up with Claudio Saavedra to discuss Meego Input Methods and the Gtk+ integration he is working on. I hope I was able to help him a bit in getting started.

Attended the Libre Graphics Meeting planning dinner sunday evening. I don’t know if I’m able to make it to the conference yet, so I did not have that much to contribute, but I let them that Libre Graphics projects are welcome to the Desktop Summit. And that I might try to organize a MyPaint workshop at LGM.