overlay: move init/free to the context of the render thread

This is done to allow overlays to make use of the renderer during
init/free.

client/renderers/EGL/egl.c

@@ -280,7 +280,6 @@ static void egl_deinitialize(LG_Renderer * renderer)
   if (this->imgui)
     ImGui_ImplOpenGL3_Shutdown();
 
-  app_unregisterGraph(this->importGraph);
   ringbuffer_free(&this->importTimings);
 
   egl_desktopFree(&this->desktop);

client/src/app.c

@@ -980,6 +980,9 @@ void app_overlayConfigRegisterTab(const char * title,
 
 void app_invalidateOverlay(bool renderTwice)
 {
+  if (g_state.state == APP_STATE_SHUTDOWN)
+    return;
+
   if (renderTwice)
     g_state.renderImGuiTwice = true;
   app_invalidateWindow(false);

client/src/main.c

@@ -201,6 +201,8 @@ static int renderThread(void * unused)
 
   LG_LOCK_INIT(g_state.lgrLock);
 
+  app_initOverlays();
+
   /* signal to other threads that the renderer is ready */
   lgSignalEvent(e_startup);
 
@@ -322,6 +324,13 @@ static int renderThread(void * unused)
 
   g_state.state = APP_STATE_SHUTDOWN;
 
+  if (g_state.overlays)
+  {
+    app_freeOverlays();
+    ll_free(g_state.overlays);
+    g_state.overlays = NULL;
+  }
+
   lgTimerDestroy(tickTimer);
   lgTimerDestroy(fpsTimer);
 
@@ -1125,8 +1134,6 @@ static int lg_run(void)
   ImFontGlyphRangesBuilder_BuildRanges(rangeBuilder, &g_state.fontRange);
   ImFontGlyphRangesBuilder_destroy(rangeBuilder);
 
-  app_initOverlays();
-
   // initialize metrics ringbuffers
   g_state.renderTimings  = ringbuffer_new(256, sizeof(float));
   g_state.uploadTimings  = ringbuffer_new(256, sizeof(float));
@@ -1666,13 +1673,6 @@ static void lg_shutdown(void)
   if (g_state.dsInitialized)
     g_state.ds->free();
 
-  if (g_state.overlays)
-  {
-    app_freeOverlays();
-    ll_free(g_state.overlays);
-    g_state.overlays = NULL;
-  }
-
   ivshmemClose(&g_state.shm);
 
   renderQueue_free();

client/src/overlay/config.c

@@ -46,16 +46,14 @@ OverlayConfig;
 
 static OverlayConfig cfg = { 0 };
 
-static bool config_init(void ** udata, const void * params)
+static void config_earlyInit(void)
 {
   cfg.callbacks    = ll_new();
   cfg.tabCallbacks = ll_new();
-  if (!cfg.callbacks)
-  {
-    DEBUG_ERROR("failed to allocate ram");
-    return false;
 }
 
+static bool config_init(void ** udata, const void * params)
+{
   return true;
 }
 
@@ -239,6 +237,7 @@ static int config_render(void * udata, bool interactive, struct Rect * windowRec
 struct LG_OverlayOps LGOverlayConfig =
 {
   .name           = "Config",
+  .earlyInit      = config_earlyInit,
   .init           = config_init,
   .free           = config_free,
   .render         = config_render

client/src/overlay/graphs.c

@@ -70,9 +70,13 @@ static void showTimingKeybind(int sc, void * opaque)
   app_invalidateWindow(false);
 }
 
-static bool graphs_init(void ** udata, const void * params)
+static void graphs_earlyInit(void)
 {
   gs.graphs = ll_new();
+}
+
+static bool graphs_init(void ** udata, const void * params)
+{
   app_overlayConfigRegister("Performance Metrics", configCallback, NULL);
   app_registerKeybind(KEY_T, showTimingKeybind, NULL,
       "Show frame timing information");
@@ -207,6 +211,7 @@ static int graphs_render(void * udata, bool interactive,
 struct LG_OverlayOps LGOverlayGraphs =
 {
   .name           = "Graphs",
+  .earlyInit      = graphs_earlyInit,
   .init           = graphs_init,
   .free           = graphs_free,
   .render         = graphs_render

client/src/overlay/msg.c

@@ -46,9 +46,13 @@ struct MsgState
 
 struct MsgState l_msg = { 0 };
 
-static bool msg_init(void ** udata, const void * params)
+static void msg_earlyInit(void)
 {
   l_msg.messages = ll_new();
+}
+
+static bool msg_init(void ** udata, const void * params)
+{
   return true;
 }
 
@@ -168,6 +172,7 @@ static int msg_render(void * udata, bool interactive, struct Rect * windowRects,
 struct LG_OverlayOps LGOverlayMsg =
 {
   .name           = "msg",
+  .earlyInit      = msg_earlyInit,
   .init           = msg_init,
   .free           = msg_free,
   .needs_overlay  = msg_needsOverlay,