getLuma()

FASTLED_FORCE_INLINE fl::u8 CRGB::getLuma

(

)

const

Get the "luma" of a CRGB object.

In other words, roughly how much light the CRGB pixel is putting out (from 0 to 255).

Definition at line 141 of file crgb.hpp.

                                                            {
    //Y' = 0.2126 R' + 0.7152 G' + 0.0722 B'
    //     54            183       18 (!)
 
    fl::u8 luma = scale8_LEAVING_R1_DIRTY( r, 54) + \
    scale8_LEAVING_R1_DIRTY( g, 183) + \
    scale8_LEAVING_R1_DIRTY( b, 18);
    cleanup_R1();
    return luma;
}

References FASTLED_FORCE_INLINE, fl::FL_NO_EXCEPT, and fl::g.