Display a warning when running under Wayland

app/gui/PcView.qml

@@ -34,7 +34,10 @@ GridView {
         // Setup signals on CM
         ComputerManager.computerAddCompleted.connect(addComplete)
 
-        if (!prefs.hasAnyHardwareAcceleration()) {
+        if (prefs.isRunningWayland()) {
+            waylandDialog.open()
+        }
+        else if (!prefs.hasAnyHardwareAcceleration()) {
             noHwDecoderDialog.open()
         }
     }
@@ -224,6 +227,18 @@ GridView {
         }
     }
 
+    MessageDialog {
+        id: waylandDialog
+        modality:Qt.WindowModal
+        icon: StandardIcon.Warning
+        standardButtons: StandardButton.Ok | StandardButton.Help
+        text: "Moonlight does not support hardware acceleration on Wayland. Continuing on Wayland may result in poor streaming performance. " +
+              "Please switch to an X session for optimal performance."
+        onHelp: {
+            Qt.openUrlExternally("https://github.com/moonlight-stream/moonlight-docs/wiki/Fixing-Hardware-Decoding-Problems");
+        }
+    }
+
     MessageDialog {
         id: pairDialog
         // don't allow edits to the rest of the window while open

app/settings/streamingpreferences.cpp

@@ -67,6 +67,11 @@ bool StreamingPreferences::hasAnyHardwareAcceleration()
                                               1920, 1080, 60);
 }
 
+bool StreamingPreferences::isRunningWayland()
+{
+    return qgetenv("XDG_SESSION_TYPE") == QByteArray("wayland");
+}
+
 int StreamingPreferences::getMaximumStreamingFrameRate()
 {
     // Never let the maximum drop below 60 FPS

app/settings/streamingpreferences.h

@@ -17,6 +17,8 @@ public:
 
     Q_INVOKABLE static bool hasAnyHardwareAcceleration();
 
+    Q_INVOKABLE static bool isRunningWayland();
+
     Q_INVOKABLE static int getMaximumStreamingFrameRate();
 
     Q_INVOKABLE QRect getDisplayResolution(int displayIndex);