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

[From: Arnim Sauerbier]

Greetings again, Dear Maemo Developers,

I am now porting several emulators and games to the Nokia 770, some of them shown here:

http://pupnik.de/software.html

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 have spent several weeks of trial and error trying to find a way around these issues by changing
various details of the SDL implementation, but have not been successful.

I have heard that Xsp doubling is fixed now and I see there is a patch for Xomap which may solve
the doubling problems on the 770.  

https://garage.maemo.org/tracker/index.php?func=detail&aid=531&group_id=164&atid=683

However, I do not see that it has been applied to my most-recent IT2006 xserver-xomap 6.6.3-28
(gregale).

Do I understand that the Xsp/Xomap bugfix will not be applied to IT2006 due to Nokia dropping
support for 770?

If this is true, is it possible to compile an unofficial Xomap server for gregale/it2006 that can
be installed without requiring reflashing the OS?

If not, could someone suggest a workaround?   It seems fairly straightforward to me that a
fullscreen on-top SDL window with disabled cursor should preclude the X server from registering
damage or calling redraws to any other windows.

Regards and thanks,
Arnim Sauerbier



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