fromBrightness()

FluxScalar fl::FluxScalar::fromBrightness ( u8 brightness )

static

setBrightness(b) as the linear flux scalar b/255.

255 is exactly unity, so full brightness cannot dim the output by a rounding step.

Definition at line 17 of file flux_scalar.cpp.hpp.

                                                                {
    // Round to nearest so mid brightnesses are not biased low. 255 lands on
    // exactly 65536: 255 * 65536 / 255.
    const u32 raw = (static_cast<u32>(brightness) * 65536u + 127u) / 255u;
    return FluxScalar(static_cast<i32>(raw));
}

References FluxScalar(), brightness, and fl::FL_NO_EXCEPT.

Referenced by fl::ColorManagedPixelSource::setFlux().

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