Added `Effect::start()` and `Effect::stop()` to allow effects to reserve memory on start and free it afterwards.

include/Effect.h

@@ -16,6 +16,8 @@ class Effect {
     void setWindow(Window win) {
       window = win;
     };
+    virtual void start() {}
+    virtual void stop() {}
 };
 
 #endif

include/effect_cycle.h

@@ -10,6 +10,8 @@ class CycleEffect : public Effect {
     unsigned long effectSince = 0;
   public:
     void changeEffect();
+    void start();
+    void stop();
 
     boolean can_be_shown_with_clock();
     boolean clock_as_mask();

src/effect_cycle.cpp

@@ -6,10 +6,21 @@ void CycleEffect::changeEffect() {
     int new_id = random8(cycle_effects->size());
     new_effect = cycle_effects->get(new_id);
   } while (&new_effect == &effect);
+  if (effect) effect->stop();
   effect = new_effect;
+  effect->start();
   effectSince = millis();
 }
 
+void CycleEffect::start() {
+    if (!effect) changeEffect();
+    else effect->start();
+}
+
+void CycleEffect::stop() {
+    if (effect) effect->stop();
+}
+
 boolean CycleEffect::can_be_shown_with_clock() {
   return effect->can_be_shown_with_clock();
 };

src/mqtt.cpp

@@ -22,7 +22,9 @@ void mqtt_callback(char* complete_topic, byte* pl, unsigned int length) {
       EffectEntry e = effects->get(i);
       if (strcmp(e.name, payload)==0) {
         //Serial.printf("Effect found in mqtt_callback: %p\n", (void *)&e->effect);
+        current_effect->stop();
         current_effect = e.effect;
+        current_effect->start();
         clear();
         return;
       }

src/pitrix.cpp

@@ -31,6 +31,8 @@ void setup() {
   ntpClient.begin();
   mqtt_setup();
   LOGln("Core * Setup complete");
+
+  current_effect->start();
 }
 
 void loop() {