Function social_club_helper 

pub fn social_club_helper() -> Rule

An in-process GPU, DXMT and no Metal HUD for the Rockstar Games Launcher’s Social Club helper.

The launcher’s embedded browser (CEF): its GPU process cannot paint into a window owned by another process under winemac, so the sign-in page stays blank. Keeping the drawing in-process fixes it; the child –type= processes inherit the switches. It is pinned to DXMT to match Steam’s CEF helper (steam_web_helper), which embeds the browser the same way.

The Metal HUD is for games and is noise on the launcher UI. It is turned off here and not on Launcher.exe because games started from the launcher would inherit the variables. metal_hud=false removes the MTL_HUD_ variables, a launcher * rule’s metal_hud=true included, so the resolution reports the HUD off; the env entry MTL_HUD_ENABLED=0 after it then turns the HUD off explicitly rather than leaving the variable unset.