LEDDisplay: fix crash when trying to obtain overlay on uninitialized …

…canvas or display (i.e. starting with blank configs)
vortigont · Feb 29, 2024 · dbf39f3 · dbf39f3
1 parent 9974679
commit dbf39f3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/display.cpp b/src/display.cpp
@@ -165,6 +165,10 @@ bool LEDDisplay::_start_hub75(const DynamicJsonDocument& doc){
 std::shared_ptr< LedFB<CRGB> > LEDDisplay::getOverlay(){
     auto instance = _ovr.lock();
 
+    // if engine or canvas does not exist (yet) just return empty obj here
+    if (!_dengine || !_canvas)
+        return instance;
+
     if (!instance){
         // no overlay exist at the moment, let's create one
         instance = std::make_shared< LedFB<CRGB> >(LedFB<CRGB>(tiles.canvas_w(), tiles.canvas_h(), _dengine->getOverlay()));