Yes, I do, but now it is slow as hell... I take every frame and scale it to new dimensions over ogles, but my "copying function" is bad. Give me some time please.
Dude, take as much time as you need. No pressure at all.
Also you are now my new favorite person on TMO haha
Yes you are right, but for now I guess that simple bilinear filtering will be ok. Other way for scaling can be added later. Scale2x looks cool. I will try both.
The disadvantage is that SDL_HAA is heavily N900/Maemo 5 dependent, so if you made the GLES scaling keep it around (disabled, etc) for future/older/other devices.