desktop: Use gamemode when enabled

desktop/src/player.rs

@@ -2,6 +2,7 @@ use crate::backends::{
     DesktopExternalInterfaceProvider, DesktopFSCommandProvider, DesktopNavigatorInterface,
     DesktopUiBackend,
 };
+use crate::cli::GameModePreference;
 use crate::custom_event::RuffleEvent;
 use crate::gui::{FilePicker, MovieView};
 use crate::preferences::GlobalPreferences;
@@ -22,6 +23,7 @@ use ruffle_frontend_utils::recents::Recent;
 use ruffle_render::backend::RenderBackend;
 use ruffle_render::quality::StageQuality;
 use ruffle_render_wgpu::backend::WgpuRenderBackend;
+use ruffle_render_wgpu::clap::PowerPreference;
 use ruffle_render_wgpu::descriptors::Descriptors;
 use std::borrow::Cow;
 use std::collections::{HashMap, HashSet};
@@ -118,6 +120,9 @@ impl PollRequester for WinitWaker {
 struct ActivePlayer {
     player: Arc<Mutex<Player>>,
     executor: Arc<AsyncExecutor<WinitWaker>>,
+
+    #[cfg(target_os = "linux")]
+    _gamemode_session: crate::dbus::GameModeSession,
 }
 
 impl ActivePlayer {
@@ -251,6 +256,18 @@ impl ActivePlayer {
             }
         }
 
+        let gamemode_enable = match preferences.gamemode_preference() {
+            GameModePreference::Default => {
+                preferences.graphics_power_preference() == PowerPreference::High
+            }
+            GameModePreference::On => true,
+            GameModePreference::Off => false,
+        };
+
+        if cfg!(not(target_os = "linux")) && gamemode_enable {
+            tracing::warn!("Cannot enable GameMode, as it is supported only on Linux");
+        }
+
         let renderer = WgpuRenderBackend::new(descriptors, movie_view)
             .map_err(|e| anyhow!(e.to_string()))
             .expect("Couldn't create wgpu rendering backend");
@@ -381,7 +398,12 @@ impl ActivePlayer {
             );
         }
 
-        Self { player, executor }
+        Self {
+            player,
+            executor,
+            #[cfg(target_os = "linux")]
+            _gamemode_session: crate::dbus::GameModeSession::new(gamemode_enable),
+        }
     }
 }