Use the actual gamemode library, instead of the helper

Sometimes gamemoderun is not packaged on certain systems, so use the
actual library if available instead to sidestep this problem.

CMakeLists.txt

@@ -10,6 +10,7 @@ option(ENABLE_WATCHDOG "Build with Tesseract support (needed for Watchdog)" OFF)
 option(USE_OWN_LIBRARIES "Build with own libraries" OFF)
 option(BUILD_FLATPAK "Build with Flatpak support in mind" OFF)
 option(USE_STEAM "Build with Steam support" OFF)
+option(USE_GAMEMODE "Build with GameMode support" ON)
 
 if (ENABLE_WATCHDOG)
     find_package(PkgConfig REQUIRED)
@@ -17,6 +18,11 @@ if (ENABLE_WATCHDOG)
     pkg_search_module(LEPTONICA REQUIRED lept)
 endif ()
 
+if (USE_GAMEMODE)
+    find_package(PkgConfig REQUIRED)
+    pkg_search_module(GAMEMODE REQUIRED gamemode)
+endif()
+
 include(FetchContent)
 
 if (NOT USE_OWN_LIBRARIES)

launcher/core/CMakeLists.txt

@@ -38,6 +38,11 @@ if(USE_STEAM)
             Steamworks)
 endif()
 
+if(USE_GAMEMODE)
+    set(LIBRARIES ${LIBRARIES}
+            ${GAMEMODE_LIBRARIES})
+endif()
+
 add_library(astra_core STATIC ${HEADERS} ${SRC})
 target_include_directories(astra_core PUBLIC
         ${KEYCHAIN_INCLUDE_DIRS}
@@ -62,6 +67,10 @@ if (ENABLE_WATCHDOG)
     target_compile_definitions(astra_core PUBLIC ENABLE_WATCHDOG)
 endif ()
 
+if(USE_GAMEMODE)
+    target_compile_definitions(astra_core PUBLIC USE_GAMEMODE)
+endif()
+
 if(USE_STEAM)
     target_compile_definitions(astra_core PUBLIC USE_STEAM)
 endif()

launcher/core/src/launchercore.cpp

@@ -21,6 +21,10 @@
 #include <keychain.h>
 #include <cotp.h>
 
+#ifdef USE_GAMEMODE
+#include <gamemode_client.h>
+#endif
+
 #include "assetupdater.h"
 #include "encryptedarg.h"
 #include "launchercore.h"
@@ -211,9 +215,12 @@ void LauncherCore::launchExecutable(
             if (profile.gamescope.refreshRate > 0)
                 arguments.push_back("-r " + QString::number(profile.gamescope.refreshRate));
         }
+    }
+#endif
 
-        if (profile.useGamemode)
-            arguments.push_back("gamemoderun");
+#if USE_GAMEMODE
+    if(isGame && profile.useGamemode) {
+        gamemode_request_start();
     }
 #endif
 

launcher/desktop/src/settingswindow.cpp

@@ -237,6 +237,10 @@ void SettingsWindow::reloadControls() {
     useGamescope->setChecked(profile.useGamescope);
     useGamemode->setChecked(profile.useGamemode);
 
+#ifndef USE_GAMEMODE
+    useGameMode->setEnabled(false);
+#endif
+
     useGamemode->setEnabled(core.gamemodeAvailable);
     useGamescope->setEnabled(core.gamescopeAvailable);