1086255 - Gamepad API broken on Windows XP

Status: RESOLVED INVALID

(Core :: DOM: Device Interfaces, defect)

Description

[Geoff Lankow (:darktrojan)]

The gamepad API is working in Firefox 31, but not in Firefox 32 onwards. My page doesn't receive any of the gamepad events.

It could be just me (given how long ago Fx32 was, I'm suspicious) but I can't think of any reason for that. I've tried it with fresh installs and new profiles.

Comment 1

[(not currently active) Ted Mielczarek]

This is probably fallout from bug 996078. Are you using an Xbox 360 controller (or something else that supports XInput, like a Logitech controller)? My best guess is that you don't have XInput available, but we explicitly don't handle XInput-capable controllers in the raw input path so your controller gets skipped:
http://hg.mozilla.org/mozilla-central/annotate/29fbfc1b31aa/hal/windows/WindowsGamepad.cpp#l657

We could change that check to only skip the controller if we successfully loaded an XInput DLL which might make this work. I'm not terribly concerned about this if it's Windows XP only, FWIW, but I'd take a simple fix.

Comment 2

[Geoff Lankow (:darktrojan)]

I have no idea if my controller's XInput or not (it's a PS2 Buzz! controller, so I would guess not), but it does work with Win7.

> We could change that check to only skip the controller if we successfully loaded an XInput DLL which might make this work.

I did notice that my WinXP install didn't have an XInput DLL, so this might be a good idea, though I don't imagine there's too many mad people like me out there trying to use this stuff on XP still.