Function sdl2::gfx::imagefilter::normalize_linear

pub fn normalize_linear(
    src1: CVec<u8>, 
    cmin: i32, 
    cmax: i32, 
    nmin: i32, 
    nmax: i32
) -> Result<CVec<u8>, String>

Filter using NormalizeLinear: D = saturation255((Nmax - Nmin)/(Cmax - Cmin)*(S - Cmin) + Nmin).