mangoapp: Don't redraw if we don't have new frames

src/app/main.cpp

@@ -73,6 +73,8 @@ void ctrl_thread(){
     }
 }
 
+bool new_frame = false;
+
 void msg_read_thread(){
     int key = ftok("mangoapp", 65);
     msgid = msgget(key, 0666 | IPC_CREAT);
@@ -85,6 +87,11 @@ void msg_read_thread(){
         if (hdr->version == 1){
             if (msg_size > offsetof(struct mangoapp_msg_v1, frametime_ns)){
                 update_hud_info_with_frametime(sw_stats, *params, vendorID, mangoapp_v1->frametime_ns);
+                {
+                    std::unique_lock<std::mutex> lk(mangoapp_m);
+                    new_frame = true;
+                }
+                mangoapp_cv.notify_one();
             }
         } else {
             printf("Unsupported mangoapp struct version: %i\n", hdr->version);
@@ -184,6 +191,11 @@ int main(int, char**)
                 HUDElements.convert_colors(*params);
                 mangoapp_paused = false;
             }
+            {
+                std::unique_lock<std::mutex> lk(mangoapp_m);
+                mangoapp_cv.wait(lk, []{return new_frame || params->no_display;});
+                new_frame = false;
+            }
             // Start the Dear ImGui frame
             ImGui_ImplOpenGL3_NewFrame();
             ImGui_ImplGlfw_NewFrame();

src/overlay_params.cpp

@@ -812,8 +812,10 @@ parse_overlay_config(struct overlay_params *params,
       std::thread(autostart_log, params->autostart_log).detach();
 #ifdef MANGOAPP
    {
+      extern bool new_frame;
       std::lock_guard<std::mutex> lk(mangoapp_m);
       params->no_display = params->no_display;
+      new_frame = true; // we probably changed how we look.
    }
    mangoapp_cv.notify_one();
 #endif