Maemo Wiki Mirror - User contributions [en]

FOSDEM 2010

2010-01-31T20:33:08Z

87.210.193.49: /* Attendees */

'''FOSDEM''' is a yearly free and non-commercial event in Brussels, from February 5th till February 7th 2010. It's organized by the community, for the community. Its goal is to provide free and open source developers a place to meet. This page is to coordinate Maemo participation. See also the Maemo activity on [[FOSDEM 2009]]

Join the [http://talk.maemo.org/showthread.php?p=356121 Talk discussion thread]

== Tracks ==

There will be Maemo content in several different tracks this year, reflecting the nature of the project as both a contributor to upstream projects and an entire distribution.

Here you will find information about Maemo content in each of the tracks.

=== [http://fosdem.org/2010/schedule/rooms/chavanne Security - main track] ===

* '''[http://fosdem.org/2010/schedule/events/maemo Maemo 6 security framework, making happy DRM business and freedom lovers with the same device]''': Elena Reshetova
*: Saturday 14:00 - 14:45
*: Room: Chavanne

=== [http://fosdem.org/2010/schedule/devrooms/embedded Embedded] ===

The biggest contingent of Maemo-related content will be in the Embedded track.

; Room
: Lameere
; Description
: The embedded/mobile room is the place to be for people with an interest in everything small, hidden, with different CPU's and/or a gadget or mobile device.
Here we discuss and present things like hacking your phone, PDA or router and everything about cross-compiling. The people that gather here are usually doing tons of cool stuff with small low-powered devices, from playing music to controlling big and complex systems.

Maemo related content:
* '''[http://fosdem.org/2010/schedule/events/emb_seriesfinale SeriesFinale, a TV show tracker for Maemo 5]''': Joaquim Rocha
*: Sunday 10:30 - 11:00
* '''[http://fosdem.org/2010/schedule/events/emb_ofono Ofono and how to use the Nokia modem plugin]''': Aki Niemi
*: Sunday 11:30 - 12:00
* '''[http://www.fosdem.org/2010/schedule/events/emb_dspbridge ARM and DSP talking to each other in OMAP3: the dspbridge]''': Víctor Manuel Jáquez Leal
*: Sunday 16:00 - 17:00

=== [http://fosdem.org/2010/schedule/devrooms/crossdesktop Cross-desktop] ===

; Room
: H.1309

'''Maemo related content'''
* [http://fosdem.org/2010/schedule/events/xd_gupnp_rygel GUPnP & Rygel: Liberating Digital Living]: Zeeshan Ali
*: Sunday 10:15 - 11:00
* [http://fosdem.org/2010/schedule/events/xd_syncml SyncML]: Patrick Ohly
*: Sunday 15:15 - 16:00

=== [http://fosdem.org/2010/schedule/devrooms/distributions Crossdistro Summit] ===
; Room
: H.1302 / H.1308
; Description
: The FOSDEM organisers want to push the envelope of their mission even further by organizing something along the lines of a "distribution summit" during FOSDEM 2010.
: The idea is that rather than having several distributions with their own respective and individual Developer Room, we will host mixed conference rooms where talks and sessions will be organized by topic, with contributors from all distributions attending and participating. Any linux distribution can participate.

'''Maemo related content'''
* '''[http://fosdem.org/2010/schedule/events/dist_maemo_council The Maemo Council: A case study in governance]''': Dave Neary
*: Saturday 14:00 - 14:45 H.1308
* '''[http://www.fosdem.org/2010/schedule/events/dist_mobile_upstream Mobile distributions and upstream challenges]'''
*: Saturday 16:45 - 17:30 H.1308
* '''[http://fosdem.org/2010/schedule/events/dist_gnome Working with GNOME upstream]''': Vincent Untz
*: A workshop on what can be done to make it easier to work with upstream projects like GNOME
*: Saturday 17.30 - 18.15 H.1302

=== [http://www.fosdem.org/2010/schedule/devrooms/xorg X.org] ===
; Room
: AW1.124
'''Maemo related content'''
* '''[http://www.fosdem.org/2010/schedule/events/xorg_shiny Polishing X11 and making it shiny]''': Daniel Stone
*: Sunday 13:00 - 13:45

=== [http://www.fosdem.org/2010/schedule/devrooms/mozilla Mozilla] ===
; Room
: H.1301
* '''[http://www.fosdem.org/2010/schedule/events/moz_firefox_mobile Firefox Mobile]''': Mark Finkle
*: Sunday 11:15 - 12:30

== Saturday evening ==

Unless anyone has a better idea, let's meet up in [http://www.laportenoire.be/ la Porte Noir] from 19h30 on (or later), where the GNOME hackers are meeting. Apparently they have a great [http://www.laportenoire.be/carte.php?clef=Fut collection of beers].
Address: La Porte Noir, 67 rue des Alexiens, Bruxelles

==Attendees==

Please keep the list in alphabetical order by first name.
{| class="wikitable sortable"
|- style="background-color: #eef"
! Name !! Nick !! Attendance !! class="unsortable" | Friday Beer Event? !! class="unsortable" | Maemo Dinner? !! class="unsortable" | More?
|-
| Alberto Garcia || [http://maemo.org/profile/view/agarcia/ agarcia] || Confirmed || Probably || Probably ||
|-
| Andrea Borgia || [http://maemo.org/profile/view/aboaboit/ aboaboit] || Confirmed || Probably || Probably ||
|-
| Andre Klapper || [http://maemo.org/profile/view/andre/ andre] || Yeah || Sure || I'd love to ||
|-
| Arnim Sauerbier || [http://maemo.org/profile/view/arnims/ arnims] || Hotel Booked || Yes || Yes || Will bring n900 with fun things
|-
| Chris Phillips || [http://maemo.org/profile/view/chrisp7/ chrisp7] || Possibly, depends on costs/time off || If Im going, definitely || ditto ||
|-
| Dave Neary || [http://maemo.org/profile/view/dneary/ dneary] || Probably || Probably not ||
|-
| David King || [http://maemo.org/profile/view/amigadave/ amigadave] || Confirmed || Maybe || Sure ||
|-
| Ekaterina Gerasimova || [http://maemo.org/profile/view/kittykat/ kittykat] || Confirmed || Maybe || Sure ||
|-
| Gerard Braad || [http://maemo.org/profile/view/gbraad/ gbraad] || Planned, not confirmed || ? || Probably ||
|-
| Henri Bergius || [http://maemo.org/profile/view/bergie/ bergie] || Yes || Yes || Maybe ||
|-
| Jeremiah C. Foster || [http://maemo.org/profile/view/jeremiah/ Jeremiah] || Confirmed || Most likely will show up, won't get drunk though. || Let's make this happen. :) ||
|-
| [[User:Guaka|Kasper Souren]] || [http://maemo.org/profile/view/guaka guaka] || Definitely. || Likely || Possibly || [http://bewelcome.org/people/guaka can host!]
|-
| Kees Jongenburger || [http://maemo.org/profile/view/keesj/ keesj] || Confirmed || No || No ||
|-
| Lucas Maneos || [http://maemo.org/profile/view/lma/ lma] || Confirmed || Probably || Probably ||
|-
| Marc Blumenfrucht || [http://maemo.org/profile/view/realitygaps/ realitygaps] || Confirmed || Yes || Probably ||
|-
| Michael Hasselmann || [http://maemo.org/profile/view/mikhas mikhas] || Confirmed || Confirmed || OK! ||
|-
| Per Wille || [http://maemo.org/profile/view/wille wille] || Confirmed || Yes ||Probably ||
|-
| Robin Burchell || [http://maemo.org/profile/view/w00t/ w00t] || Planned, not confirmed || Possibly, depending on travel arrangements || Probably ||
|-
| Quim Gil || [http://maemo.org/profile/view/qgil/ qgil] || Planned, not confirmed || ? || ? ||
|-
| Martin Dengler || [http://maemo.org/profile/view/mdengler/ mdengler] || Travel booked, hotel not so much || Yes || Yes || Will bring n900
|-
| Peter De Schrijver || [http://maemo.org/profile/view/p2mate p2mate] || Confirmed || Yes || Maybe ||
|}

== Other useful information ==
* [https://mobilevikings.com/ Mobile Vikings] offers prepaid Belgian SIM cards with 1 GB data, 1000 SMS messages and 60 minutes calling for 15 euro (if porting number, else the card costs 15 euro in addition to the minimum top-up of 15 euro to get data/sms offer)

[[Category:Community]]
[[Category:Development]]
[[Category:Events]]

OpenGL-ES

2009-12-05T11:12:01Z

87.210.193.49: /* Compiling under scratchbox */

[[Category:Development]]
== OpenGL ES ==

Maemo OpenGL ES

=== Books about OpenGL ES ===

* [http://www.amazon.com/Mobile-3D-Graphics-Kaufmann-Computer/dp/0123737273/ref=sr_1_1?ie=UTF8&s=books&qid=1235944663&sr=8-1 Mobile 3D graphics with OpenGL ES and M3G]

Excellent introductory section covering OpenGL basics. Covers ES 1.1, not ES 2.0.

* [http://www.amazon.com/OpenGL%20ES-2-0-Programming-Guide/dp/0321502795/ref=sr_1_1?ie=UTF8&s=books&qid=1235944783&sr=1-1 OpenGL ES 2.0 programming guide]

The 'Gold Book' is hardly in the same league as the above book, or the original 'Red Book' - being aimed at folk who already know their OpenGL lingo. It dives into laborious detail as if trying to spew as much of the ES 2.0 spec onto the page as possible. It assumes a Windows audience and the AMD simulator. You may be better off looking at the PowerVR SDK tutorial code than reading this book, then coming back to it for reference and further code examples.

=== Other documentation ===

* [http://www.khronos.org/opengles/2_X/ Khronos OpenGL ES documentation and specifications]

=== Imagination Technologies SDK ===

* [http://www.imgtec.com/powervr/insider/sdk/KhronosOpenGLES2xSGX.asp OpenGL ES SDK]

=== Other related documentation ===

* [http://blogs.forum.nokia.com//data/blogs/resources/300003/fremantle_bossa_2009.pdf Kate's presentation in Bossa 2009 conference] about Fremantle and section about OpenGL ES 2.0

=== OpenGL variants ===
[[image:Opengl.svg]]

* OpenGL 1.0 has fixed shaders and fixed function API to using them
* OpenGL 2.0 adds programmable shaders, but fixed function pipeline API is still there for backward compatibility
* OpenGL 3.1 removes support for old fixed function pipeline, so it is very similar to OpenGL ES 2.0

* OpenGL ES 1.0 is based on OpenGL 1.0 with extra redundant API's removed and fixed point (fractional integer) API added
* OpenGL ES 2.0 is based on OpenGL 2.0, so using programmable shaders is mandatory, since all old fixed function API's have been removed

=== Porting between OpenGL variants ===

* OpenGL 1.0 application works with OpenGL 2.0 but not vice versa
* OpenGL 1.0 application is possible to port to OpenGL ES 1.0, but needs work if it is using some of the removed API's
* OpenGL 2.0 application that only uses programmable shaders is possible to port OpenGL ES 2.0, but may still need some work
* Porting OpenGL 1.0 or OpenGL ES 1.0 applications to OpenGL ES 2.0 needs a rewrite to replace fixed function API usage with programmable shaders

What this means in paractice ?

Most of the desktop Linux OpenGL applications are written mostly using the OpenGL1.x style fixed pipeline API's including
extensive use of glBegin/glEnd and application level matrix transformation calls. OpenGL2.0 introduces programable shaders
that allows moving these tasks to Graphics processor ( GPU ) but does not force it. In OpenGL-ES2.0 the old fixed pipeline API's are removed and can't be used any more.
It is mandatory to use programable shaders and some code must be rewritten. The rewritten code can then also take advantage of
programable shaders in desktop OpenGL 2.x implementations. Other alternative with less rewriting is to use OpenGL-ES1.0 emulation
libraries in maemo. These libraries contain OpenGL-ES1.0 API and fixed OpenGL-ES1.0 emulating shader code.

=== Compiling under scratchbox ===

There is an excellent way to familiarize yourself with OpenGL ES 2.0 which is by trying the PowerVR tutorials that can be found in the SDK under the TrainingCourse directory.

Get the SDK here: [http://www.imgtec.com/powervr/insider/sdk/KhronosOpenGLES2xSGX.asp]

The SDK libs and headers can be dropped into your X86 environment and run into
the Xephyr X11 window - but you'll need to kill the window manager first!

To compile OpenGL ES 2.0 applications you need to have package "libgles2-sgx-img-dev" installed.
It is as standard, part of Fremantle aplha ARMEL but at the moment it is missing from the x86 version. We try to get the x86 equivalent OpenGL ES2 emulation library available soon.

The examples have their own Makefiles for Linux hosts but you can copy the files
to your own directory and try the Makefile below. Reason to use this own Makefile is
that the makefiles coming with the SDK compiles examples with x86 libraries part
of the SDK and not armel/x86 maemo libraries in scratchbox.

This Makefile at the moment supports the basic
and PvrShell examples (01..05) but does not yet support PvrTools examples (06 and above).

To compile some of PoverVR tutorial examples, you can use the following Makefile
<pre>
CC=g++

CPPFLAGS = -DBUILD_OGLES2
LDLIBS=-lEGL -lX11 -lGLESv2

all:OGLES2Texturing OGLES2BasicTnL OGLES2IntroducingPVRTools OGLES2HelloTriangle_LinuxX11

OGLES2HelloTriangle_LinuxX11:OGLES2HelloTriangle_LinuxX11.o

OGLES2Texturing: PVRShellOS.o OGLES2Texturing.o PVRShell.o PVRShellAPI.o

OGLES2BasicTnL: PVRShellOS.o OGLES2BasicTnL.o PVRShell.o PVRShellAPI.o

OGLES2IntroducingPVRTools: PVRShellOS.o OGLES2IntroducingPVRTools.o PVRShell.o PVRShellAPI.o
</pre>

=== Using with QGLWidget ===

There is in Qt 4.5 ready made example hellogl_es2 that can be found from
examples/opengl/hellogl_es2 directory. There is also equivalent examples
for desktop opengl and opengl_es2 .

The example is also good showing what is different between OpenGL versions.
The hellogl uses plain desktop "glBegin / glEnd" functions with display lists. Hellogl_es2 uses vertex attribute pointers and shaders instead of glBegin/glEnd.
The helloes_gl2 is even more complicated because it uses programmable shaders
instead fixed pipeline in both of the previous exaples.

If you try compile yourself unmodified version of hellogl_es2 for maemo,
you need to add in <b>void GLWidget::initializeGL ()</b>

Line in beginning <pre>setlocale(LC_NUMERIC, "C"); // Reset locale for compilation</pre>
and after shaders has been compiled line <pre> setlocale(LC_ALL, ""); // restore locale</pre>
because locale affects in shader compilation even it should not do

FOSDEM 2009

2009-01-27T20:48:23Z

87.210.193.49:

=='''Attendees'''==
People coming to Fosdem - http://fosdem.org

Please keep the list in alphabetical order by first name.
{| border="1"
|-
! Name !! Nick !! Friday Beer Event ?
|-
| Andre Klapper|| andre__ || Don't know yet (late arrival)
|-
| Juha Kallioinen|| kaltsi || Don't know arrival time yet
|-
| Kees Jongenburger || keesj || No
|-
| Lucas Maneos|| lma || Yes
|-
| Nick Loeve|| trickie || Yes
|-
| Quim Gil|| qgil || Yes
|-
| Siarhei Siamashka|| ssvb || Yes
|-
| || timeless || No
|-
| Valério Valério|| VDVsx || Yes
|-
| || ||
|-
|}

== Dinner, anyone? ==
Let's when is the best time for everybody. Add yourself to your preferred day(s).

Friday night
* Quim
* VDVsx

Saturday night
* Kees Jongenburger
* Quim
* timeless
* VDVsx

Sunday night