[Feature Request] Stylus (S-Pen) support via `RETRO_POINTER`

[f4mrfaux]

I’ve submitted a PR to RetroArch adding Samsung S-Pen / stylus support through
[RETRO_POINTER](https://docs.libretro.com/development/retroarch/input/#pointer) interface:

👉 [libretro/RetroArch#18201]

This makes it possible to use stylus devices as a proper pointer/lightgun input method inside cores. For SNES, that’s especially relevant because of:

• Mouse-based games (e.g., Clock Tower Deluxe fan hack, Mario Paint, etc.)
• Lightgun games that benefit from a more authentic pointer-style experience

The stylus approach makes mouse-style games far more usable on touch devices, and lightgun games feel closer to the arcade experience.

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Why I’m posting here

Once the RetroArch side is merged, cores like Snes9x may need small adjustments to handle stylus input smoothly. I’ve started experimenting with this in a forked branch:

👉 (https://github.com/f4mrfaux/snes9x)

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Tracking / References

• Main RetroArch PR: [libretro/RetroArch#18201](ANDROID S-Pen stylus support RetroArch#18201)
• SNES9x test branch: snes9x – stylus/spen-support

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I’d like to use this issue just to give maintainers a heads-up and provide a place for Snes9x-specific notes or feedback.

Thanks!

[f4mrfaux]

so, its working, im trying to find an elegant way to do the relative/absolute coordinate translation and mouse acceleration in a way that feels good to the end user.
"You think thats what you want, but trust me you dont" - Blizzard