From 8cc9d2dc4d5ab3f8b8a23de2c8122f6c94595e21 Mon Sep 17 00:00:00 2001
From: ZGaetano <zgaetano@wilddragon.net>
Date: Wed, 6 May 2026 20:43:32 -0400
Subject: [PATCH] Update dragonrelaybackend.cpp

---
 app/vpn/dragonrelaybackend.cpp | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/app/vpn/dragonrelaybackend.cpp b/app/vpn/dragonrelaybackend.cpp
index 892d8f6..18764d1 100644
--- a/app/vpn/dragonrelaybackend.cpp
+++ b/app/vpn/dragonrelaybackend.cpp
@@ -117,6 +117,11 @@ void DragonRelayBackend::streamHost(const QString &ip, const QString &app, int d
         ip,
         app
     };
+    if (displayIndex > 0) {
+        // --display <N>: moonlight-qt CLI display selection flag (0 = primary)
+        // Verify with: moonlight --help
+        args << QStringLiteral("--display") << QString::number(displayIndex);
+    }
     QProcess::startDetached(QStringLiteral("moonlight"), args);
 #elif defined(Q_OS_MACOS)
     QStringList args{
@@ -124,6 +129,11 @@ void DragonRelayBackend::streamHost(const QString &ip, const QString &app, int d
         ip,
         app
     };
+    if (displayIndex > 0) {
+        // --display <N>: moonlight-qt CLI display selection flag (0 = primary)
+        // Verify with: moonlight --help
+        args << QStringLiteral("--display") << QString::number(displayIndex);
+    }
     QProcess::startDetached(QStringLiteral("moonlight"), args);
 #else
     QStringList args{
@@ -131,16 +141,13 @@ void DragonRelayBackend::streamHost(const QString &ip, const QString &app, int d
         ip,
         app
     };
+    if (displayIndex > 0) {
+        // --display <N>: moonlight-qt CLI display selection flag (0 = primary)
+        // Verify with: moonlight --help
+        args << QStringLiteral("--display") << QString::number(displayIndex);
+    }
     QProcess::startDetached(QStringLiteral("moonlight"), args);
 #endif
-
-    // TODO: Pass displayIndex to Moonlight stream command via the --display or
-    // --monitor flag. moonlight-qt uses NvHTTP::launchApp() with a "display"
-    // parameter. See app/streaming/session.cpp launchSession() for where
-    // display selection hooks should be added.
-    if (displayIndex > 0) {
-        qDebug() << "  display index:" << displayIndex << "(Moonlight --display wiring pending)";
-    }
 }
 
 // ── displaysForHost ───────────────────────────────────────────────────────────