computeAdjustment()

CRGB CRGB::computeAdjustment ( fl::u8 scale, const CRGB & colorCorrection, const CRGB & colorTemperature )

static

Calculates the combined color adjustment to the LEDs at a given scale, color correction, and color temperature.

Parameters

scale	the scale value for the RGB data (i.e. brightness)
colorCorrection	color correction to apply
colorTemperature	color temperature to apply

Returns

a CRGB object representing the adjustment, including color correction and color temperature

Definition at line 29 of file crgb.cpp.hpp.

                                                                        {
#if defined(NO_CORRECTION) && (NO_CORRECTION == 1)
    return CRGB(scale, scale, scale);
#else
    CRGB adj(0, 0, 0);
    if (scale > 0) {
        for (fl::u8 i = 0; i < 3; ++i) {
            fl::u8 cc = colorCorrection.raw[i];
            fl::u8 ct = colorTemperature.raw[i];
            if (cc > 0 && ct > 0) {
                // Optimized for AVR size. This function is only called very
                // infrequently so size matters more than speed.
                // (cc + 1) * scale is at most 65280, so it fits in
                // 16 bits. Reordering the exact product avoids a wide multiply.
                const fl::u16 scaledCorrection = (fl::u16(cc) + 1U) * scale;
                fl::u32 work = fl::u32(scaledCorrection) * (fl::u16(ct) + 1U);
                work /= 0x10000L;
                adj.raw[i] = work & 0xFF;
            }
        }
    }
    return adj;
#endif
}

References CRGB(), fl::FL_NO_EXCEPT, and scale.

Referenced by fl::CLEDController::getAdjustment().

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