Detailed Description

Unsigned 8-bit alpha / brightness — UNORM8.

Represents values in [0.0, 1.0] inclusive.

Interpretation: raw / 255 raw 0 = 0.0 raw 128 = 128/255 ~ 0.502 raw 255 = 255/255 = 1.0

FastLED's scale8() uses the (scale+1)>>8 approximation for efficient UNORM scaling: scale8(x, 255) == x (exact identity).

Implicit conversion to/from unsigned char preserves full backward compatibility with code that treats this as a plain u8.

Definition at line 42 of file alpha.h.

#include <alpha.h>

Public Member Functions
constexpr	alpha8 () FL_NOEXCEPT

constexpr	alpha8 (double f) FL_NOEXCEPT

constexpr	alpha8 (float f) FL_NOEXCEPT

template<typename IntT, alpha_detail::enable_if_integer_t< IntT > = 0>
constexpr	alpha8 (IntT v) FL_NOEXCEPT

constexpr	operator unsigned char () const FL_NOEXCEPT

alpha8 &	operator*= (unsigned char rhs) FL_NOEXCEPT

alpha8 &	operator++ () FL_NOEXCEPT

alpha8	operator++ (int) FL_NOEXCEPT

alpha8 &	operator+= (unsigned char rhs) FL_NOEXCEPT

alpha8 &	operator-- () FL_NOEXCEPT

alpha8	operator-- (int) FL_NOEXCEPT

alpha8 &	operator-= (unsigned char rhs) FL_NOEXCEPT

alpha8 &	operator/= (unsigned char rhs) FL_NOEXCEPT

alpha8 &	operator<<= (int rhs) FL_NOEXCEPT

alpha8 &	operator>>= (int rhs) FL_NOEXCEPT

constexpr unsigned char	raw () const FL_NOEXCEPT

constexpr float	to_float () const FL_NOEXCEPT

Static Public Member Functions
static constexpr alpha8	from_float (float f) FL_NOEXCEPT

Static Private Member Functions
static constexpr unsigned char	_clamp (float f) FL_NOEXCEPT

The documentation for this struct was generated from the following file:

Public Member Functions