scale_signed()

template<typename T>

T fl::alpha16::scale_signed ( T v ) const

inlineconstexpr

Scale a signed integer by this alpha (UNORM16 semantics).

result = (v * (raw + 1)) >> 16 Identity: scale_signed(x) == x when raw == 65535 Zero: scale_signed(x) == 0 when raw == 0 and |x| < 65536

Definition at line 123 of file alpha.h.

                                                     {
        return static_cast<T>(
            (static_cast<long long>(v) *
             static_cast<long long>(static_cast<unsigned int>(value) + 1u)) >> 16);
    }

References fl::FL_NO_EXCEPT, and value.