[Suggestion] Analog as a section of touchscreen

[snapuswip3]

I would love to see analog sticks mappable as a section of the touchscreen.
There are loads of games for DS that used the touchscreen as a makeshift analog stick (Mario 64, Metroid Prime Hunters etc).
The icing on the cake would be if you implemented this functionality for the Xperia Play touchpads aswell.

Is this a feasable idea?

And now that we have filtering options for the textures, what about an option to increase the internal resolution?

Loving this emulator in its present state regardless!