This program enables other programs which are running under Wine to send Rich Presence data to a Linux Discord client.
This is simply a proof-of-concept, demonstrating that this is possible, the code itself is a mish-mash of copy-paste from Microsoft docs and linux-discord-rpc.dll.
The way it works is simply by bridging the gap between Windows named pipes
(\\.\pipe\discord-ipc-0) and Unix domain sockets
(/run/user/{userid}/discord-ipc-0). Ideally something like this would be
implemented in wine itself, it should be possible to add some sort of "mapped
named pipe" feature where wineserver will serve handles to unix sockets
instead pseudo-handles to named pipes, but I don't know how to approach
something like that.
i686-w64-mingw32-gcc -masm=intel main.c -o winediscordipcbridge
Just run this program first, wait for it to start listening to the pipe, and
then launch your program/game. The two programs need to be running under the
same wineprefix. If you're using Steam Play/Proton, download and follow the
instructions in winediscordipcbridge-steam.sh.
This program should automatically stop once the other program stops, although it'll keep running if nothing ever connects.
I've personally tested this with osu! on both 32-bit and 64-bit wineprefixes, and Muse Dash using the script to launch from Steam.
https://github.com/lhark/truckersmp-cli also reported success.