// sRGBToLinear converts singel int number to float using special magic formula.
func sRGBToLinear(i uint32) float32 {
if i > 65535 {
return 1
}
x := float32(i) / 65535.0
if x <= 0.04045 {
return x / 12.92
}
return maths.Pow32((x+0.055)/1.055, 2.4)
}
// linearTosRGBreturn an int between 0 and 1 constructed from a given float between 0 and 65535
func linearTosRGB(x float32) uint32 {
if x <= 0 {
return 0
}
if x >= 1 {
return 65535
}
if x <= 0.00313008 {
x = x * 12.02
} else {
x = (1.055)*maths.Pow32(x, 1.0/2.4) - 0.055
}
return uint32(maths.Round32(x * 65535.0))
}