qfx.h

#pragma once
 
#include <stdint.h>
 
 
 
template<class T, int F, int I> class qfx {
    T i:I;  
    T f:F;  
public:
    qfx(float fx) { i = fx; f = (fx-i) * (1<<F); }
    qfx(uint8_t _i, uint8_t _f) {i=_i; f=_f; }
 
    uint32_t operator*(uint32_t v) { return (v*i) + ((v*f)>>F); }
    uint16_t operator*(uint16_t v) { return (v*i) + ((v*f)>>F); }
    int32_t operator*(int32_t v) { return (v*i) + ((v*f)>>F); }
    int16_t operator*(int16_t v) { return (v*i) + ((v*f)>>F); }
#if defined(FASTLED_ARM) | defined(FASTLED_RISCV) | defined(FASTLED_APOLLO3)
    int operator*(int v) { return (v*i) + ((v*f)>>F); }
#endif
};
 
template<class T, int F, int I> static uint32_t operator*(uint32_t v, qfx<T,F,I> & q) { return q * v; }
template<class T, int F, int I> static uint16_t operator*(uint16_t v, qfx<T,F,I> & q) { return q * v; }
template<class T, int F, int I> static int32_t operator*(int32_t v, qfx<T,F,I> & q) { return q * v; }
template<class T, int F, int I> static int16_t operator*(int16_t v, qfx<T,F,I> & q) { return q * v; }
#if defined(FASTLED_ARM) | defined(FASTLED_RISCV) | defined(FASTLED_APOLLO3)
template<class T, int F, int I> static int operator*(int v, qfx<T,F,I> & q) { return q * v; }
#endif
 
typedef qfx<uint8_t, 4,4> q44;
typedef qfx<uint8_t, 6,2> q62;
typedef qfx<uint16_t, 8,8> q88;
typedef qfx<uint16_t, 12,4> q124;