Thought I’d have a play with the GP2x development kit. 10 minutes later:


This is Woopsi, compiled using the GP2x dev kit, running in Windows using SDL. Doesn’t quite work yet as there appear to be a few incorrect constants. I need to get hold of an F-200 build of SDL as the version that comes with the dev kit I’m using doesn’t seem to include the mouse handling code.

As a proof-of-concept, though, it does the job. The GP2x loses the second screen, but the screen is 320x240 instead of the DS’ 256x192 so it really only loses half of a DS screen. Having everything on one screen is a bit of a bonus, too.


After some more minor tinkering with the SDL code:


Now that the screens are the right size and aren’t overlapping, the mouse code works in the Windows compile. I need to test the GP2x compile, but I’d need to trim the top screen off first.

I’m not sure what’s happened to the button glyphs…

This highlights a problem in the code - it makes assumptions about the size of the screens. Not particularly helpful if you want to make portable code.

In addition to this, I’ve updated the main VC++ project to match the Xcode version. All of the (very buggy, as per the last post) scroller code is in there.


Heh, simple. It’s very slow, but when you realise that the entire display is being drawn pixel by pixel to a RAM buffer, then copied pixel by pixel to the frame buffer (plus the non-existent top screen is still being rendered in RAM), you can see that there’s plenty of room for optimisation.

Oh, and the mouse code doesn’t work. Not sure if I need updated SDL libs or if I need to change the way that Woopsi interacts with the stylus on this machine.

And the glyphs are back. They’re missing from the PC version because of the unsigned/signed char problem. I should fix that.