cmake: add FORCE_XCB option

CMakeLists.txt

@@ -8,6 +8,7 @@ option(NO_GIT_CLONE     "Disables git clone usage for 3rdParty dependencies" OFF
 option(UPDATER          "Enables updater" ${PORTABLE_INSTALL})
 option(DISCORD_RPC      "Enables Discord Rich Presence" ON)
 option(USE_CCACHE       "Enables usage of ccache when ccache has been found" ON)
+option(FORCE_XCB        "Forces Qt to use the xcb platform on linux" LINUX)
 
 project(RMG)
 
@@ -39,6 +40,11 @@ if (NOT PORTABLE_INSTALL AND UPDATER)
     set(UPDATER OFF)
 endif()
 
+if (FORCE_XCB AND (WIN32 OR MSYS))
+    message(WARNING "XCB Qt platform not supported on windows, disabling FORCE_XCB!")
+    set(FORCE_XCB OFF)
+endif()
+
 if (PORTABLE_INSTALL)
     set(CMAKE_INSTALL_PREFIX "")
     set(INSTALL_PATH "Bin/${CMAKE_BUILD_TYPE}")

Source/RMG/CMakeLists.txt

@@ -20,6 +20,10 @@ if (DISCORD_RPC)
     add_definitions(-DDISCORD_RPC)
 endif(DISCORD_RPC)
 
+if (FORCE_XCB)
+    add_definitions(-DFORCE_XCB)
+endif(FORCE_XCB)
+
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(SDL2 REQUIRED sdl2)
 

Source/RMG/main.cpp

@@ -16,6 +16,7 @@
 
 #include <RMG-Core/Core.hpp>
 #include <iostream>
+#include <cstdlib>
 
 //
 // Local Functions
@@ -74,6 +75,10 @@ int main(int argc, char **argv)
     // install message handler
     qInstallMessageHandler(message_handler);
 
+#ifdef FORCE_XCB
+    setenv("QT_QPA_PLATFORM", "xcb", 1);
+#endif // FORCE_XCB
+
     QApplication app(argc, argv);
 
     UserInterface::MainWindow window;