Move to handleOverlayDraw

usermods/FlashEffect/flash_effect.h

@@ -18,9 +18,20 @@ platformio_override.ini example to enable this mod:
 const char flashEffectSpec[] PROGMEM = "Flash@Duration,,,,,,Overlay;!,!;!;01";
 bool flash_reset[256];
 
+//TODO: set to false before push to prod
+bool flash_enable = true;
+
+struct FlashData {
+  uint32_t start_ms;
+};
+
+FlashData flash_data[256]{};
+
 struct FlashEffect : Usermod {
   bool initDone = false;
-
+  uint16_t default_duration = 100;
+  uint32_t default_color = RGBW32(255,255,255,255);
+
   void setup() override {
     strip.addEffect(255, &flashEffect_, flashEffectSpec);
     Serial.println("flash setup");
@@ -42,16 +53,47 @@ struct FlashEffect : Usermod {
   }
 
   void readFromJsonState(JsonObject& root) override {
-    Serial.printf("Event Read JSON State");
+    Serial.printf("Event Read JSON State\n");
     if (!initDone) return;
+    if(!root["flash_enable"].isNull()){
+      flash_enable = (root["flash_enable"] == 1);
+      Serial.printf("flash_effect enable=%d\n", flash_enable);
+    }
     JsonObject flash = root["flash"];
     if(flash.isNull()) return;
     auto seg_obj = flash["seg_id"];
     if(seg_obj.isNull()) return;
     uint16_t seg_id = seg_obj;
     if (seg_id >= 256) return;
-    flash_reset[seg_id] = true;
-    Serial.printf("reset flash_effect seg_id=%d\n", seg_id);
+    flash_data[seg_id].start_ms = millis();
+    Serial.printf("flash_effect seg_id=%d\n", seg_id);
+  }
+
+  /*
+    * handleOverlayDraw() is called just before every show() (LED strip update frame) after effects have set the colors.
+    * Use this to blank out some LEDs or set them to a different color regardless of the set effect mode.
+    * Commonly used for custom clocks (Cronixie, 7 segment)
+    */
+  void handleOverlayDraw() override {
+    if(!flash_enable) return;
+    //uint16_t frametime = strip.getFrameTime();
+    //Serial.printf("frametime=%d\n", frametime);
+    uint8_t seg_size = strip.getSegmentsNum();
+    auto segments = strip.getSegments();
+    for(uint8_t i=0; i < seg_size; i++){
+      if(flash_data[i].start_ms + default_duration <= strip.now) continue;
+      uint32_t color = color_fade(default_color, impulseResponse(strip.now - flash_data[i].start_ms), false);
+      segments[i].fill(color);
+    }
+    strip.trigger();
+  }
+
+  uint32_t impulseResponse(uint32_t elapsed_ms){
+    uint32_t response = 100 * (default_duration-elapsed_ms) / default_duration;
+    if (response > 255) response = 255;
+    if (response <= 0) response = 1;
+    //Serial.printf("impulseResponse brightness=%d\n", response);
+    return response;
   }
 
 private: