ensureBuffer()

template<typename CONTROLLER, EOrder RGB_ORDER = GRB>

void RGBWEmulatedController< CONTROLLER, RGB_ORDER >::ensureBuffer ( fl::i32 num_leds )

inlineprivate

Ensures the internal RGBW buffer is large enough for the LED count.

Parameters

num_leds

Number of RGB LEDs to convert to RGBW

Reallocates the buffer if needed, accounting for the 4:3 byte ratio when packing RGBW data into RGB format

Definition at line 288 of file chipsets.h.

                                      {
        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);
        }
    }

References mController, mNumRGBLeds, mRGBWPixels, and Rgbw::size_as_rgb().

Referenced by showPixels().

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