Method clear

src/FastLED.cpp.hpp:161–224

}

void CFastLED::clear(ClearFlags flags) {
	// Lambda to check if flag is set, clear it, and return true if it was set
	auto clearFlag = [&flags](ClearFlags flag) -> bool {
		if ((flags & flag) != ClearFlags::NONE) {
			flags = static_cast<ClearFlags>(static_cast<fl::u32>(flags) & ~static_cast<fl::u32>(flag));
			return true;
		}
		return false;
	};


	// Reset POWER_SETTINGS - reset power management to defaults
	if (clearFlag(ClearFlags::POWER_SETTINGS)) {
		FastLED.mPPowerFunc = nullptr;      // No power limiting function
		FastLED.mNPowerData = 0xFFFFFFFF;   // No power limit (max value)
	}

	// Reset BRIGHTNESS - reset global brightness to 255 (full brightness)
	if (clearFlag(ClearFlags::BRIGHTNESS)) {
		FastLED.mScale = 255;
	}

	// Reset REFRESH_RATE - reset refresh rate limiting to unlimited
	if (clearFlag(ClearFlags::REFRESH_RATE)) {
		FastLED.mNMinMicros = 0;  // No minimum delay between frames
	}

	// Reset FPS_COUNTER - reset FPS tracking counter to 0
	if (clearFlag(ClearFlags::FPS_COUNTER)) {
		FastLED.mNFPS = 0;
	}

	// Reset CHANNELS - remove all channels from controller list
	if (clearFlag(ClearFlags::CHANNELS)) {
		// Wait for engines to complete, with 2s timeout to prevent infinite hang
		// if an engine is permanently stalled (e.g. PARLIO on ESP32-C6 hw bug)
		FastLED.wait(2000);

		// Remove all channels by iterating through a copy of the vector
		// (we make a copy because remove() modifies channels())
		fl::vector<fl::ChannelPtr> channelsCopy = channels();
		for (auto& channel : channelsCopy) {
			remove(channel);
		}

		// Reset bus manager state (clear enqueued and transmitting channels)
		fl::ChannelManager& manager = fl::channelManager();
		manager.reset();

		// Clear the internal storage (should already be empty, but ensure it)
		channels().clear();
	}

	// Reset CHANNEL_ENGINES - clear all registered channel drivers
	if (clearFlag(ClearFlags::CHANNEL_ENGINES)) {
		// Always wait for all channel bus transmissions to complete first
		FastLED.wait();
		fl::ChannelManager& manager = fl::channelManager();