Performance hit while working with screen depth 16

shivaprasad javali jbsp72 at gmail.com
Mon Jul 13 05:56:13 EDT 2009


@ James
I have attached my script to change the screen depth.

@Tomeu
Is there any possiblity of Sugar changing its default depth to 24  in the
feature? By what you say it seems like this is a problem with sugar. So is
it acceptable for my Activity to change the screen depth so that it runs
faster?

On Mon, Jul 13, 2009 at 3:10 PM, Tomeu Vizoso <tomeu at sugarlabs.org> wrote:

> On Mon, Jul 13, 2009 at 11:24, James Cameron<quozl at laptop.org> wrote:
> > On Mon, Jul 13, 2009 at 02:08:13PM +0530, shivaprasad javali wrote:
> >> Sorry, I didn't understand the question. If you are talking about where
> my
> >> activity is for you to download, I am sorry I cannot provide you the
> activity
> >> itself.
> >
> > No, I wasn't asking about the activity.
> >
> >> If you are asking which file I changed to get the screen depth of the XO
> to be
> >> 24, it is the xorg.conf file present at /etc/X11.
> >
> > Yes, I was asking about your small script.  Can you provide your small
> > script that changes teh screen depth and restarts X?
>
> Btw, the issue of depth transformations have been known in the Geode
> for quite some time. We didn't switched to 24bpp because of the amount
> of memory available.
>
> AFAIR the problem was that Cairo has no 16bit surfaces on which we
> could work, so we use 32 (or is it 24?) and those need to be converted
> by the X server. I have heard a rumour about someone (OpenMoko?
> Maemo?) having invested resources in adding 16bit surfaces to Qt so it
> ran properly on their hardware.
>
> Just found this after some googling:
>
> http://ariya.blogspot.com/2008/08/qt-44-and-maemo.html
>
> Regards,
>
> Tomeu
>
> > --
> > James Cameron    mailto:quozl at us.netrek.org     http://quozl.netrek.org/
> > _______________________________________________
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> >
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