From 4a1d1896b7c31a54aaae9311b2226c4a881d990b Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Mon, 13 Nov 2023 11:32:50 +0000
Subject: [PATCH] Try to avoid being forced onto unsupported wayland path. Refs
 #3124

---
 qrenderdoc/Code/qrenderdoc.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/qrenderdoc/Code/qrenderdoc.cpp b/qrenderdoc/Code/qrenderdoc.cpp
index 5745b0a61..b187b09ef 100644
--- a/qrenderdoc/Code/qrenderdoc.cpp
+++ b/qrenderdoc/Code/qrenderdoc.cpp
@@ -198,6 +198,20 @@ int main(int argc, char *argv[])
   if(IsRunningAsAdmin())
     qInfo() << "Running as administrator";
 
+#if defined(RENDERDOC_PLATFORM_LINUX) && !defined(RENDERDOC_WINDOWING_WAYLAND)
+  bool envChanged = false;
+  {
+    const char *qpa_plat = getenv("QT_QPA_PLATFORM");
+    // if not set or empty, force non-wayland to help go through backwards compatibility path on wayland.
+    char env_set[] = "QT_QPA_PLATFORM=xcb\0";
+    if(!qpa_plat || qpa_plat[0] == 0)
+    {
+      putenv(env_set);
+      envChanged = true;
+    }
+  }
+#endif
+
   QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
   QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 
@@ -569,6 +583,11 @@ int main(int argc, char *argv[])
       RENDERDOC_InitialiseReplay(env, coreargs);
     }
 
+#if defined(RENDERDOC_PLATFORM_LINUX) && !defined(RENDERDOC_WINDOWING_WAYLAND)
+    if(envChanged)
+      unsetenv("QT_QPA_PLATFORM");
+#endif
+
     if(!crashReportPath.isEmpty())
     {
       QVariantMap json;