[Sugar-devel] [IAEP] 3D engine uses in a no-nonsense GUI (was: XO Gen 1.5)

NoiseEHC NoiseEHC at freemail.hu
Wed Apr 22 05:14:03 EDT 2009

I think most of those effects can be just as easily be done by the 2D 
engine (like what the Geode has). Of course it would need a LOT of 
coding, like killing the stupid X driver model with the X server 
process, using a compositing windows manager, rewriting GTK+ to use some 
form of retained rendering mode (like a super optimized Cairo library 
with some scene manager functionality) and finally fixing all of those 
GTK applications which became buggy because of this rendering change. Oh 
yeah, almost forgotten that moving to OpenGL would need just the same 
amount of work.
So not only would it chew trough the XO 1.5's battery like crazy but it 
would not run on the XO 1.0 so does it really worth that effort?

Martin Langhoff wrote:
> On Tue, Apr 21, 2009 at 1:42 PM, Martin Dengler
> <martin at martindengler.com> wrote:
>> Imagine if it actually looked like the demo:
>> http://www.sugarlabs.org/index.php?template=gallery&page=media_01
> Exactly my thoughts. There are a couple of things we have to be
> mindful of as we step into the wild 3D world...
>  - memory footprint -- those smooth transitions count on having
> various full-screen buffers, one for each screen you might want to
> slide smoothly into.
>  - batery burn -- the OpenGL API was originally designed for high end
> workstations, and has some battery-depleting features such as a hi-res
> timer event that triggers all the time and prevents sleep
> The iPhone uses these smooth UI tricks (to a fantastic effect), and
> its battery life is a fraction of every other phone -- I'd say that
> the 3D niceness is part of the reason why.
> cheers,
> m

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