writeAPA102()

template<typename CONTAINER_UIN8_T>

void fl::PixelIterator::writeAPA102 ( CONTAINER_UIN8_T * out, bool hd_gamma = false )

inline

Encode pixels in APA102/DOTSTAR format (zero allocation)

Parameters

out	Output buffer to write encoded bytes
hd_gamma	Enable high-definition gamma correction (per-LED brightness)

Note

Protocol: [Start:32b 0x00][LED:[0xE0|bri5][B][G][R]] x N, then [End: (N/32)+1 x 32b 0xFF]

Definition at line 396 of file pixel_iterator.h.

                                                                                {
        FL_UNUSED(hd_gamma);  // only read under FASTLED_HD_COLOR_MIXING
        auto back_ins = fl::back_inserter(*out);
 
        #if FASTLED_HD_COLOR_MIXING
        if (hd_gamma) {
            // HD gamma mode: per-LED brightness
            auto pixel_range = makeScaledPixelRangeRGB(this);
            auto brightness = makeScaledBrightness(this);
            encodeAPA102_HD(pixel_range.first, pixel_range.second,
                                      brightness, back_ins);
            return;
        }
        #endif
 
        #if FASTLED_USE_GLOBAL_BRIGHTNESS == 1
        // Global brightness mode: extract from first pixel
        auto pixel_range = makeScaledPixelRangeRGB(this);
        encodeAPA102_AutoBrightness(pixel_range.first, pixel_range.second,
                                              back_ins);
        #else
        // Full brightness mode
        auto pixel_range = makeScaledPixelRangeRGB(this);
        encodeAPA102(pixel_range.first, pixel_range.second,
                               back_ins, 31);
        #endif
    }

References fl::back_inserter(), brightness, fl::encodeAPA102(), fl::encodeAPA102_AutoBrightness(), fl::encodeAPA102_HD(), fl::FL_NO_EXCEPT, FL_UNUSED, and fl::makeScaledPixelRangeRGB().

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