From 0a0699f272a53a09aaff8f7d1c0371c1a4077f70 Mon Sep 17 00:00:00 2001
From: Nadia Holmquist Pedersen <nadia@nhp.sh>
Date: Mon, 20 May 2024 23:39:33 +0200
Subject: [PATCH] Linux: Force SDL2 video driver selection to X11 (#197)

Co-authored-by: Anghelo Carvajal <angheloalf95@gmail.com>
---
 src/main/main.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/main/main.cpp b/src/main/main.cpp
index 826533e..42b382f 100644
--- a/src/main/main.cpp
+++ b/src/main/main.cpp
@@ -51,6 +51,11 @@ ultramodern::gfx_callbacks_t::gfx_data_t create_gfx() {
     SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS5_RUMBLE, "1");
     SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1");
     SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
+
+#if defined(__linux__)
+    SDL_SetHint(SDL_HINT_VIDEODRIVER, "x11");
+#endif
+
     if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMECONTROLLER) > 0) {
         exit_error("Failed to initialize SDL2: %s\n", SDL_GetError());
     }
@@ -133,6 +138,10 @@ ultramodern::WindowHandle create_window(ultramodern::gfx_callbacks_t::gfx_data_t
 #elif defined(__ANDROID__)
     static_assert(false && "Unimplemented");
 #elif defined(__linux__)
+    if (wmInfo.subsystem != SDL_SYSWM_X11) {
+        exit_error("Unsupported SDL2 video driver \"%s\". Only X11 is supported on Linux.\n", SDL_GetCurrentVideoDriver());
+    }
+
     return ultramodern::WindowHandle{ wmInfo.info.x11.display, wmInfo.info.x11.window };
 #else
     static_assert(false && "Unimplemented");