[maemo-developers] [maemo-developers] first impressions and some reports

[From: Gustavo Barbieri]

On 7/7/05, Gustavo Barbieri <barbieri at gmail.com> wrote:
> On 7/7/05, Salonen Kuisma <kuisma.salonen at maemo.org> wrote:
> > Hi,
> >
> > ext Gustavo Barbieri wrote:
> > > Hello,
> > >
> > > Now that I have the maemo environment set up, I started to love this
> > > thing!!! And python!
> > >
> > > Thanks to Osvaldo and Ruda, I can run PythonCAD without any changes!
> > >
> > > Also, my game tutorial (pt_BR) runs perfectly (just need to check the
> > > perfomance on a real device, since it's side scroll and redraws the
> > > screen every time):
> > > http://www.gustavobarbieri.com.br/jogos/jogo.tar.gz
> > >    Could someone run "python2.4 jogo/a06/jogo.py -f -r 800x480" on a
> > > real device and check if performance is an issue... if it can do at
> > > least 30fps it's good enough. If it's ok I'll develop a game using
> > > that engine. Also, it can be optimized a bit, I wrote it as an
> > > educative project.
> > >
> >
> > I haven't checked it but it unfortunately cannot get that high
> > framerates with the resoluation with current SDL we have (and pygame
> > depends on the SDL).
> >
> > And I am still not sure how much python will downgrade performance but I
> > think that for now you unfortunately should just stick to partial screen
> > refreshing if you want it to work smoothly on the device. At least you
> > shouldn't scroll all the time, since < 20 fps isn't that smooth (not
> > sure how much under 20 fps since i haven't enought of the experience
> > with the pygame).
> 
> I know... I'll try a quick pygame app to test if side scrolling is
> doable at all. It it passes the test I'll write something on wiki so
> people can know how to do.
>    Expect something by the end of the night.

Here it is: http://ltc08.ic.unicamp.br/~gustavo/pygame-maemo-test.tar.bz2

I have 2 optimized versions of that game:
  - pygame-noalpha: remove alpha transparency, use colorkey instead.
Much faster, but still repaints the screen everytime
  - pygame-dirtyrectangles: the background is redrawn fewer times and
I use dirty rectangles to just update areas that need to be repainted.
If this doesn't work, hardly any scroll side game will work.

run them like:
   $scriptname -f -r 800x480


-- 
Gustavo Sverzut Barbieri
---------------------------------------
Computer Engineer 2001 - UNICAMP
GPSL - Grupo Pro Software Livre
Cell..: +55 (19) 9165 8010
Jabber: gsbarbieri at jabber.org
  ICQ#: 17249123
   MSN: barbieri at gmail.com
 Skype: gsbarbieri
   GPG: 0xB640E1A2 @ wwwkeys.pgp.net