Fix Wayland (and X11) support on NVIDIA (Linux)

src-tauri/src/main.rs

@@ -1,6 +1,30 @@
 // Prevents additional console window on Windows in release, DO NOT REMOVE!!
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
+// Automatically sets environment variables to work around issues with WebKitGTK on NVIDIA cards.
+// When running in Wayland, it sets __NV_DISABLE_EXPLICIT_SYNC to 1
+// When running in X11, it sets WEBKIT_DISABLE_COMPOSITING_MODE to 1
+#[cfg(target_os = "linux")]
+fn fix_nvidia() {
+    let variable = match std::env::var("GDK_BACKEND") {
+        Ok(val) => {
+            match val.as_str() {
+                "wayland" => "__NV_DISABLE_EXPLICIT_SYNC",
+                _ => "WEBKIT_DISABLE_COMPOSITING_MODE"  // if GDK_BACKEND is not "wayland", assume X11 is in use
+            }
+        },
+        Err(_) => "WEBKIT_DISABLE_COMPOSITING_MODE"  // if GDK_BACKEND is blank, assume X11 is in use
+    };
+
+    // SAFETY: There is no other thread where this is ran.
+    unsafe {
+        std::env::set_var(variable, "1");
+    }
+}
+
 fn main() {
+    #[cfg(target_os = "linux")]
+    fix_nvidia();
+
     modfriend_lib::run()
 }