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

[f4mrfaux]

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

👉 [libretro/RetroArch#18201]
This feature enables stylus devices to act as proper pointer or lightgun inputs within cores. For MAME2016, especially as a classic arcade-focused emulator, stylus support opens up exciting possibilities such as:

• Mouse-based arcade-style titles or UI navigation enhancements.
• Providing more precise, arcade-authentic pointer control on touch devices and tablets.

Adding stylus input support will make gameplay and navigation smoother and more enjoyable, particularly for fast-paced arcade titles where fine pointer control can make a big difference.

---

Why I’m posting here

Once the RetroArch PR is merged, the MAME2016 core might require slight adjustments to handle stylus inputs correctly. I’ve already begun experimenting with a forked branch:

👉 f4mrfaux/mame2016-libretro — stylus/spen-support

---

Tracking / References

• Main RetroArch PR: [libretro/RetroArch#18201](ANDROID S-Pen stylus support RetroArch#18201)
• MAME2016 experimental branch: f4mrfaux/mame2016-libretro — stylus/spen-support

---

I'd like this issue to act as a heads-up for maintainers and serve as a place for MAME2016-specific notes or feedback as this feature progresses.

Thanks — looking forward to collaboration!