rgb -> hsl and rgb -> hsv conversion with boost::gil

rgb2hsl.cpp

#include <boost/gil/gil_all.hpp>
#include <boost/gil/extension/toolbox/hsv.hpp>
#include <boost/gil/extension/toolbox/hsl.hpp>
#include <iostream>

void pc(std::string name, unsigned r, unsigned g, unsigned b) {
    std::clog << name << ": " << r << "," << g << "," << b << "\n";
}

void rgb2hsv(unsigned sr, unsigned sg, unsigned sb,
             float & h, float & s, float& v) {
    using namespace boost;
    using namespace gil;
    using namespace hsv_color_space;
    rgb8_pixel_t rgb_src(sr,sg,sb);
    rgb8_pixel_t rgb_dst(0,0,0);
    hsv32f_pixel_t hsv_src,hsv_dst;
    color_convert(rgb_src, hsv_src);
    color_convert(rgb_dst, hsv_dst);
    h = get_color(hsv_src,hue_t());
    s = get_color(hsv_src,saturation_t());
    v = get_color(hsv_src,value_t());
}

void hsv2rgb(float h, float s, float v,
             unsigned & r, unsigned & g, unsigned & b) {
    using namespace boost;
    using namespace gil;
    using namespace hsv_color_space;
    hsv32f_pixel_t hsv_src(h,s,v);
    rgb8_pixel_t rgb_dst;
    color_convert(hsv_src, rgb_dst);
    r = get_color(rgb_dst,red_t());
    g = get_color(rgb_dst,green_t());
    b = get_color(rgb_dst,blue_t());
}

void rgb2hsl(unsigned sr, unsigned sg, unsigned sb,
             float & h, float & s, float& l) {
    using namespace boost;
    using namespace gil;
    using namespace hsl_color_space;
    //using namespace hsl_color_space;
    rgb8_pixel_t rgb_src(sr,sg,sb);
    hsl32f_pixel_t hsl_src;
    color_convert(rgb_src, hsl_src);
    h = get_color(hsl_src,hue_t());
    s = get_color(hsl_src,saturation_t());
    l = get_color(hsl_src,lightness_t());
}

void hsl2rgb(float h, float s, float l,
             unsigned & r, unsigned & g, unsigned & b) {
    using namespace boost;
    using namespace gil;
    using namespace hsl_color_space;
    hsl32f_pixel_t hsl_src(h,s,l);
    rgb8_pixel_t rgb_dst;
    color_convert(hsl_src, rgb_dst);
    r = get_color(rgb_dst,red_t());
    g = get_color(rgb_dst,green_t());
    b = get_color(rgb_dst,blue_t());
}

int main() {
    float h,s,v;
    unsigned r,g,b;

    r = 127;
    g = 0;
    b = 255;

    rgb2hsv(r,g,b,h,s,v);
    pc("rgb",r,g,b);
    pc("hsv", h,s,v);
    hsv2rgb(h,s,v,r,g,b);
    pc("hsv->rgb",r,g,b);

    r = 127;
    g = 0;
    b = 255;

    rgb2hsl(r,g,b,h,s,v);
    pc("rgb",r,g,b);
    pc("hsv", h,s,v);
    hsl2rgb(h,s,v,r,g,b);
    pc("hsl->rgb",r,g,b);

}