Borderless Fullscreen support

[Axer128]

Currently the only fullscreen option triggers exclusive fullscreen. Exclusive mode is not desirable on modern systems, though doesn't hurt to support both.

[mstan]

Hello! Thank you for the suggestion.

I have updated the fullscreen picker to offer a borderless windowed option. Please give it a try and let me know if it works for you! https://github.com/mstan/MegaManX6Recomp/releases/tag/v0.0.7-alpha

[mstan]

Going to go ahead and close this issue since I haven't gotten any feedback on it. If the borderless doesn't work how you'd like, feel free to respond here or open a new issue.

Take care!

[Axer128]

Tested latest version (v1.0.3) , no change: Both exclusive and borderless modes result in exclusive mode on my system. (lengthy black screen flicker on alt tab while either mode engaged)

Can achieve proper borderless mode via magpie (avail free here on github) by setting game to window mode first and using magpie to scale to borderless.

But yea native feature not yet working.

Also both fullscreen modes should hide the windows mouse cursor since its not used. Atm they do not.

Relevant system specs:
Win 11 25H2
i7 14700KF
RTX 4070Ti , latest drivers
1440p, 360hz monitor. windows DPI scaling set to 125%

[mstan]

Thanks for following up. I think I may have figured out what happened here. I think this got implemented, and then silently regressed when I moved MMX6 from SDL2 to SDL3.

https://github.com/mstan/MegaManX6Recomp/releases/tag/v1.0.4-borderless-test.1

Would you mind to download this pre-release and give it a try for me?

Choose Borderless, try alt tabbing out and back a few times. Let mek now if the flash still occurs. Also let me know about the cursor (should be hidden now).

I've attached a COLLECT_FULLSCREEN_DIAGNOSTICS.bat you can run while it's running if you're still seeing issues. Hoping that'll get me the info I need. Output should be fullscreen-diagnostic-*.json . you can also run it in Exclusive too and give me that output too. But only do so if you're finding issues are persisting.

[Axer128]

fullscreen-diagnostic-20260814-044627-borderless.json
fullscreen-diagnostic-20260814-045531-exclusive.json

Gave it a go, diagnostic .jsons trying both borderless and exclusive modes attached.

Both modes still behave as exclusive (long black screen flicker on either alt tab, win key or alt+enter).
But they do now both properly hide the mouse cursor.
Sidenote: ctrl+f also toggles fullscreen mode, regardless of hotkey settings. Setting it to F11, f11 does nothing.. many bugs with the hotkeys so ill open separate issue for them. (F11 is a popular modern default for borderless fullscreen toggle given its how browsers work, rarely conflicts with other binds and a decent amount of modern indie games run on electron/chromium embedded, A few games go as far as to have f11 toggle to borderless, while the classic alt + enter toggles exclusive mode.

Also tried latest v1.06 and same but does not hide cursor.

Notably , your mega man X SNES recomp, the borderless mode works great, as expected. Though does not hide the mouse cursors. So easiest fix might be grabbing its code. Though knowing why SDL3 behaves stupid like this is also of interest as i've seen a few other developers also struggle with this.

[Axer128]

no change in latest build.