log

src/core/core.cpp

@@ -543,6 +543,7 @@ struct System::Impl {
 
     ExecuteProgramCallback execute_program_callback;
     ExitCallback exit_callback;
+    GameLogCallback game_log_callback;
 
     std::array<u64, Core::Hardware::NUM_CPU_CORES> dynarmic_ticks{};
     std::array<MicroProfileToken, Core::Hardware::NUM_CPU_CORES> microprofile_cpu{};
@@ -1011,6 +1012,18 @@ void System::RegisterExitCallback(ExitCallback&& callback) {
     impl->exit_callback = std::move(callback);
 }
 
+void System::RegisterGameLogCallback(GameLogCallback&& callback) {
+    impl->game_log_callback = std::move(callback);
+}
+
+void System::AppendGameMessage(std::string& text) {
+    if (impl->game_log_callback) {
+        impl->game_log_callback(text);
+    } else {
+        LOG_CRITICAL(Core, "game_log_callback must be initialized by the frontend");
+    }
+}
+
 void System::Exit() {
     if (impl->exit_callback) {
         impl->exit_callback();

src/core/core.h

@@ -462,6 +462,18 @@ public:
      */
     void RegisterExitCallback(ExitCallback&& callback);
 
+    /// Type used for the frontend to designate a callback for System to display log output.
+    using GameLogCallback = std::function<void(std::string)>;
+
+    /**
+     * Registers a callback from the frontend for System to display log output.
+     * @param callback Callback from the frontend to display log output.
+     */
+    void RegisterGameLogCallback(GameLogCallback&& callback);
+
+    /// Inserts a new entry on the game log ouput window
+    void AppendGameMessage(std::string& text);
+
     /// Instructs the frontend to exit the application.
     void Exit();
 

src/core/hle/service/lm/lm.cpp

@@ -276,6 +276,7 @@ private:
 
         if (text_log) {
             output_log += fmt::format("Log Text: {}\n", *text_log);
+            system.AppendGameMessage(*text_log);
         }
         LOG_DEBUG(Service_LM, "LogManager {} ({}):\n{}", NameOf(entry.severity),
                   DestinationToString(destination), output_log);