Function ensureBuffer

src/chipsets.h:287–303

@brief Ensures the internal RGBW buffer is large enough for the LED count @param num_leds Number of RGB LEDs to convert to RGBW @details Reallocates the buffer if needed, accounting for the 4:3 byte ratio when packing RGBW data into RGB format

    /// @details Reallocates the buffer if needed, accounting for the 4:3 byte ratio
    /// when packing RGBW data into RGB format
    void ensureBuffer(fl::i32 num_leds) {
        if (num_leds != mNumRGBLeds) {
            mNumRGBLeds = num_leds;
            // The delegate controller expects the raw pixel byte data in multiples of 3.
            // In the case of src data not a multiple of 3, then we need to
            // add pad bytes so that the delegate controller doesn't walk off the end
            // of the array and invoke a buffer overflow panic.
            fl::u32 new_size = Rgbw::size_as_rgb(num_leds);
            mRGBWPixels.reset(new CRGB[new_size]);  // ok bare allocation (array new)
			// showPixels may never clear the last two pixels.
			for (fl::u32 i = 0; i < new_size; i++) {
				mRGBWPixels[i] = CRGB(0, 0, 0);
			}

			mController.setLeds(mRGBWPixels.get(), new_size);
        }
    }

    fl::unique_ptr<CRGB[]> mRGBWPixels; ///< Internal buffer for packed RGBW data
    fl::i32 mNumRGBLeds = 0;            ///< Number of RGB LEDs in the original array