Support for Gamemode

[LeandroStanger]

https://github.com/FeralInteractive/gamemode

[nanonyme]

I'm not sure this is reasonable to do on Flatpak-level as it doesn't know when Steam has launched a game. This seems more like a thing that should be in Steam itself.

[nanonyme]

I guess something that could be done with this is to ship libgamemode in the app and expose gamemode DBus to the container so the daemon gets to run in host and games that grow integration could take it into use. @TingPing opinions?

[Tomin1]

I think that's exactly what should be done. I already tried to add it but I'm missing libsystemd headers and I don't know what would be a good way to add them. I suppose our runtime/platform/whatever doesn't include them.

This is what I have so far (apply to current master aka aa14866), it doesn't build yet:

diff --git a/com.valvesoftware.Steam.json b/com.valvesoftware.Steam.json
index 287c594..33b30b4 100644
--- a/com.valvesoftware.Steam.json
+++ b/com.valvesoftware.Steam.json
@@ -15,6 +15,7 @@
         "--talk-name=org.gnome.SettingsDaemon",
         "--talk-name=org.freedesktop.NetworkManager",
         "--talk-name=org.kde.StatusNotifierWatcher",
+        "--talk-name=com.feralinteractive.GameMode",
         "--filesystem=xdg-music:ro",
         "--device=all",
         "--allow=multiarch",
@@ -68,6 +69,14 @@
 		"sha256": "c1cfd4e1d4d708c031d60801e527abc9b6d34b85f2ffa2cadd21f75ff38151cd"
 	    }]
 	},
+	{
+	    "name": "gamemode",
+	    "sources": [{
+	        "type": "git",
+	        "url": "https://github.com/FeralInteractive/gamemode.git",
+	        "tag": "1.2"
+	    }]
+	},
 	{
 	    "name": "steam_wrapper",
 	    "buildsystem": "simple",

[nanonyme]

Seems a bit strange the library would need systemd headers. I thought they were just for the daemon

[nanonyme]

@Tomin1 Try passing it with-systemd=false with-daemon=false

[nanonyme]

Also probably with-examples=false

[nanonyme]

Please make a pull request, we can work on review and improvements there

[valentindavid]

I suppose that to work you need to install game mode daemon on the host. Are there compatibility issues across versions?

[nanonyme]

They haven't even done any releases yet so who knows. But yes, that's the way this feature is going to need to work so the daemon can run outside sandbox

[valentindavid]

This is something that would be good for non steam games on Flathub. Should it go in the shared modules?

[nanonyme]

Imo let's do it right this time and only put it to shared modules once we have proof it works with the build system. It's easier to test build embedded modules

[Tomin1]

@nanonyme Thank you for your insight. It was helpful although not enough here. I made a pull request.

[LeandroStanger]

@nanonyme Gamemode activated automatically?