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

[From: Frantisek Dufka]

Eero Tamminen wrote:

> ext Markku Vire wrote:
>> If we need one fullscreen app, why not to launch a new X-session that
>> uses this lower, pixel-doubled resolution and then run our SDL game
>> there? Other applications would not recognize anything.
> 
> Same problem as using framebuffer directly.  How user switches
> to another application?   How to invoke power menu properly etc.
> 

So to sum it up - for this to be workable solution, not hack with 
various nasty side effects it should:

1. not crash due to pixeldoubling mode left turned on by mistake
2. allow system dialogs and infoprints to overlay active window and have 
normal density (i.e. 800x480)
3. allow SDL apps to use half resolution(s) easily
4. optionally allow to intermix updates both resolutions at it suits 
developer (not portable, maemo specific port)

4. needs to work anyway due to 2. and also 3. can be written by using 4.

Still this leads me to original suggestion of having pixel doubling to 
be not persinsten flag but property of rectangle update. If this is not 
possible to do in X the most sane solution IMO is to hack direct 
framebuffer access it into SDL to do such updates possibly together with 
emulating different resolutions in SDL too.

Since we have sources there can be community volunteers to do it 
(including myself). The question is, does it have any chance to be 
merged to official firmware? Expecting people to update SDL just for 
your game is not good.

Frantisek