Homebrew Is there a gameboy emulator for DS that does a proper 2x screen?

[Gameboy Color]

Lameboy for DS
http://lameboy.nutki.com/?cat=3

Does only stretch to fullscreen, but it doesn't do the option like a GBA emulator on the PSP does where you can literally multiply the gameboy image x2 for perfect pixels, even if there will be a few lines missing due to the screen not being big enough.

Is there any emulator that does this? I would really like this as I don't mind a few lines missing off my screen for perfect pixels. Or if it's possible to modify the existing lameboy with this option. Thanks.

 

[Another World]

lameboy is going to be your only real choice for gbx games.

-another world

 

[FAST6191]

160x144 = GB/GBC res- http://nocash.emubase.de/pandocs.htm#gameboytechnicaldata
256x192 = DS res - http://nocash.emubase.de/gbatek.htm#dstechnicaldata
480×272 = PSP res (sadly I have no PSP tech docs of a similar calibre to the above two).

Though I imagine the DS could handle a nearest neighbour upscaling as far as raw grunt goes it is more than jump the tips cut off which is pretty killer when the GB screen necessitates economical use of the screen in the first place.