feat: detect GameMode and MangoHud's presence

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

4 files changed, 46 insertions, 2 deletions

diff --git a/launcher/Application.cpp b/launcher/Application.cpp
index 710fa38d..31e9d1a3 100644
--- a/launcher/Application.cpp
+++ b/launcher/Application.cpp
@@ -113,6 +113,11 @@
 
 #include <sys.h>
 
+#ifdef Q_OS_LINUX
+#include <dlfcn.h>
+#include "gamemode_client.h"
+#endif
+
 
 #if defined Q_OS_WIN32
 #ifndef WIN32_LEAN_AND_MEAN
@@ -1573,6 +1578,23 @@ void Application::updateCapabilities()
         m_capabilities |= SupportsMSA;
     if (!getFlameAPIKey().isEmpty())
         m_capabilities |= SupportsFlame;
+
+#ifdef Q_OS_LINUX
+    if (gamemode_query_status() >= 0)
+        m_capabilities |= SupportsGameMode;
+
+    {
+        void *dummy = dlopen("libMangoHud_dlsym.so", RTLD_LAZY);
+        // try normal variant as well
+        if (dummy == NULL)
+            dummy = dlopen("libMangoHud.so", RTLD_LAZY);
+
+        if (dummy != NULL) {
+            dlclose(dummy);
+            m_capabilities |= SupportsMangoHud;
+        }
+    }
+#endif
 }
 
 QString Application::getJarPath(QString jarFile)
diff --git a/launcher/Application.h b/launcher/Application.h
index 05525bcf..41fd4c47 100644
--- a/launcher/Application.h
+++ b/launcher/Application.h
@@ -95,6 +95,8 @@ public:
 
         SupportsMSA = 1 << 0,
         SupportsFlame = 1 << 1,
+        SupportsGameMode = 1 << 2,
+        SupportsMangoHud = 1 << 3,
     };
     Q_DECLARE_FLAGS(Capabilities, Capability)
 
diff --git a/launcher/ui/pages/global/MinecraftPage.cpp b/launcher/ui/pages/global/MinecraftPage.cpp
index e3ac7e7c..cc597fe0 100644
--- a/launcher/ui/pages/global/MinecraftPage.cpp
+++ b/launcher/ui/pages/global/MinecraftPage.cpp
@@ -122,6 +122,16 @@ void MinecraftPage::loadSettings()
     ui->perfomanceGroupBox->setVisible(false);
 #endif
 
+    if (!(APPLICATION->capabilities() & Application::SupportsGameMode)) {
+        ui->enableFeralGamemodeCheck->setDisabled(true);
+        ui->enableFeralGamemodeCheck->setToolTip(tr("Feral Interactive's GameMode could not be found on your system."));
+    }
+
+    if (!(APPLICATION->capabilities() & Application::SupportsMangoHud)) {
+        ui->enableMangoHud->setDisabled(true);
+        ui->enableMangoHud->setToolTip(tr("MangoHud could not be found on your system."));
+    }
+
     ui->showGameTime->setChecked(s->get("ShowGameTime").toBool());
     ui->showGlobalGameTime->setChecked(s->get("ShowGlobalGameTime").toBool());
     ui->recordGameTime->setChecked(s->get("RecordGameTime").toBool());
diff --git a/launcher/ui/pages/instance/InstanceSettingsPage.cpp b/launcher/ui/pages/instance/InstanceSettingsPage.cpp
index f11cf992..03910745 100644
--- a/launcher/ui/pages/instance/InstanceSettingsPage.cpp
+++ b/launcher/ui/pages/instance/InstanceSettingsPage.cpp
@@ -348,9 +348,19 @@ void InstanceSettingsPage::loadSettings()
     ui->enableMangoHud->setChecked(m_settings->get("EnableMangoHud").toBool());
     ui->useDiscreteGpuCheck->setChecked(m_settings->get("UseDiscreteGpu").toBool());
 
-    #if !defined(Q_OS_LINUX)
+#if !defined(Q_OS_LINUX)
     ui->settingsTabs->setTabVisible(ui->settingsTabs->indexOf(ui->performancePage), false);
-    #endif
+#endif
+
+    if (!(APPLICATION->capabilities() & Application::SupportsGameMode)) {
+        ui->enableFeralGamemodeCheck->setDisabled(true);
+        ui->enableFeralGamemodeCheck->setToolTip(tr("Feral Interactive's GameMode could not be found on your system."));
+    }
+
+    if (!(APPLICATION->capabilities() & Application::SupportsMangoHud)) {
+        ui->enableMangoHud->setDisabled(true);
+        ui->enableMangoHud->setToolTip(tr("MangoHud could not be found on your system."));
+    }
 
     // Miscellanous
     ui->gameTimeGroupBox->setChecked(m_settings->get("OverrideGameTime").toBool());