[maemo-developers] Xsp pixel-doubling solutions for Nokia 770?

[From: Tapani Pälli]

Daniel Stone wrote:
> On Mon, Apr 30, 2007 at 10:10:23AM +0300, ext Tapani Pälli wrote:
>   
>> ext Arnim Sauerbier wrote:
>>     
>>> Many of these are acceptably fast at 320x240 but too slow at 640x480 or 800x480.  The problem is
>>> that some SDL applications do not maintain 2x doubling but flicker to 1x scaling - example video
>>> here:
>>>
>>> http://pupnik.de/UQM_Xsp_SDL_Doubling_Bugs.avi
>>>       
>> I could not watch this video, I guess I'm missing some codecs but I can
>> also throw a another guess, very likely the application draws over
>> 400x240 area. With 770 there is no clipping done for you and you have to
>> take care to clip your drawing to 400x240 when using pixeldoubler. IIRC
>> this is fixed for N800 (?)
>>     
>
> Yeah, it just ignores all drawing beyond 400x240 on the N800.
>
>   
>> Please note that pixeldoubler is very platform specific thing and for it
>> to work you have to touch the code, there's no way around it. Also, it's
>> not very 'official' feature for gaming (at least yet) so it's not very
>> well supported. Hopefully we can build some safety around it in the
>> future as it's very useful for gaming. Even if you take care of
>> clipping, a system-modal dialog  or infoprint popping from the UI can
>> destroy the current view.
>>     
>
> I don't like it as it's far too ITOS-specific (I won't be satisfied
> until XSP no longer exists).  It'll probably be replaced with RandR some
> time in the future, even if the fixed resolution choices are only
> 800x480 and 400x240.
>
>   

Yep, RandR would be ideal place and it would work 'globally' for the
framework then.

> Cheers,
> Daniel
>   

// Tapani