Update src-tauri/src/main.rsfeat/linux-nvidia-prime-support

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

1 files changed, 24 insertions, 9 deletions

diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index 5109182..952d250 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -863,19 +863,34 @@ async fn start_game(
     }
 
     // On Linux, inject GPU environment variables for hybrid graphics support
+    // but do not override values that are already set in the environment.
     #[cfg(target_os = "linux")]
     {
+        let mut injected_any = false;
+
         // NVIDIA Prime Render Offload - enables discrete NVIDIA GPU on hybrid systems
-        command.env("__NV_PRIME_RENDER_OFFLOAD", "1");
-        command.env("__GLX_VENDOR_LIBRARY_NAME", "nvidia");
-        
+        if std::env::var_os("__NV_PRIME_RENDER_OFFLOAD").is_none() {
+            command.env("__NV_PRIME_RENDER_OFFLOAD", "1");
+            injected_any = true;
+        }
+
+        if std::env::var_os("__GLX_VENDOR_LIBRARY_NAME").is_none() {
+            command.env("__GLX_VENDOR_LIBRARY_NAME", "nvidia");
+            injected_any = true;
+        }
+
         // AMD DRI_PRIME - enables discrete AMD GPU on hybrid systems
-        command.env("DRI_PRIME", "1");
-        
-        emit_log!(
-            window,
-            "Injected GPU environment variables for Linux (NVIDIA Prime & AMD DRI_PRIME)".to_string()
-        );
+        if std::env::var_os("DRI_PRIME").is_none() {
+            command.env("DRI_PRIME", "1");
+            injected_any = true;
+        }
+
+        if injected_any {
+            emit_log!(
+                window,
+                "Injected default GPU environment variables for Linux (NVIDIA Prime & AMD DRI_PRIME, only where unset)".to_string()
+            );
+        }
     }
 
     // Spawn and handle output