[client] overlay: add new needs_render for realtime overlays

client/include/app.h

@@ -85,7 +85,7 @@ void app_glSwapBuffers(void);
 #define MAX_OVERLAY_RECTS 10
 void app_registerOverlay(const struct LG_OverlayOps * ops, void * params);
 void app_setOverlay(bool enable);
-
+bool app_overlayNeedsRender(void);
 /**
  * render the overlay
  * returns:

client/include/interface/overlay.h

@@ -37,6 +37,10 @@ struct LG_OverlayOps
   /* final free */
   void (*free)(void * udata);
 
+  /* return true if realtime rendering is required when in jitRender mode
+   * optional, if omitted assumes false */
+  bool (*needs_render)(void * udata, bool interactive);
+
   /* perform the actual drawing/rendering
    *
    * `interactive` is true if the application is currently in overlay interaction

client/src/app.c

@@ -734,6 +734,26 @@ static inline LG_DSPointer mapImGuiCursor(ImGuiMouseCursor cursor)
   }
 }
 
+bool app_overlayNeedsRender(void)
+{
+  struct Overlay * overlay;
+
+  if (g_state.overlayInput)
+    return true;
+
+  for (ll_reset(g_state.overlays);
+      ll_walk(g_state.overlays, (void **)&overlay); )
+  {
+    if (!overlay->ops->needs_render)
+      continue;
+
+    if (overlay->ops->needs_render(overlay->udata, g_state.overlayInput))
+      return true;
+  }
+
+  return false;
+}
+
 int app_renderOverlay(struct Rect * rects, int maxRects)
 {
   int  totalRects  = 0;

client/src/main.c

@@ -174,7 +174,9 @@ static int renderThread(void * unused)
 
       const uint64_t pending =
         atomic_load_explicit(&g_state.pendingCount, memory_order_acquire);
-      if (!lgResetEvent(g_state.frameEvent) && !pending && !g_state.overlayInput
+      if (!lgResetEvent(g_state.frameEvent)
+          && !pending
+          && !app_overlayNeedsRender()
           && !g_state.lgr->needs_render(g_state.lgrData))
       {
         if (g_state.ds->skipFrame)