encodeLPD8806()

template<typename InputIterator, typename OutputIterator>

void fl::encodeLPD8806	(	InputIterator	first,
		InputIterator	last,
		OutputIterator	out )

Encode pixel data in LPD8806 format.

Template Parameters

InputIterator	Iterator yielding fl::array<u8, 3> (3 bytes in wire order)
OutputIterator	Output iterator accepting uint8_t

Parameters

first	Iterator to first pixel
last	Iterator past last pixel
out	Output iterator for encoded bytes

Note

LPD8806 uses GRB wire order: pixel[0]=Green, pixel[1]=Red, pixel[2]=Blue

Definition at line 33 of file lpd8806.h.

                                                                                            {
    // LED data: GRB with MSB set (count as we go)
    size_t num_leds = 0;
    while (first != last) {
        const fl::array<u8, BYTES_PER_PIXEL_RGB>& pixel = *first;
 
        // LPD8806 requires MSB set on each byte, and uses 7-bit color depth
        // GRB order: 0=G, 1=R, 2=B
        *out++ = lpd8806Encode(pixel[0]);  // Index 0 (GRB order: Green)
        *out++ = lpd8806Encode(pixel[1]);  // Index 1 (GRB order: Red)
        *out++ = lpd8806Encode(pixel[2]);  // Index 2 (GRB order: Blue)
 
        ++first;
        ++num_leds;
    }
 
    // Latch: ((num_leds * 3 + 63) / 64) bytes of 0x00
    size_t latch_bytes = (num_leds * 3 + 63) / 64;
    for (size_t i = 0; i < latch_bytes; i++) {
        *out++ = 0x00;
    }
}

References FL_NOEXCEPT, and lpd8806Encode().

Referenced by fl::PixelIterator::writeLPD8806().

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