#pragma once

#ifndef TCG_PIXEL_H

#define TCG_PIXEL_H

// tcg includes

#include "pixel_ops.h"

// STD includes

#include <limits></limits>

namespace tcg

{

//***********************************************************

//    Tcg Pixel Types  definition

//***********************************************************

template <typename chan,="" pixel_category="" typename=""></typename>

struct Pixel;

template <typename chan=""></typename>

struct Pixel<chan, grayscale_pixel_tag=""> {</chan,>

	typedef grayscale_pixel_tag pixel_category;

	typedef Chan channel_type;

public:

	channel_type l;

public:

	Pixel() : l() {}

	Pixel(channel_type _l) : l(_l) {}

	bool operator==(const Pixel &other) const { return l == other.l; }

	bool operator!=(const Pixel &other) const { return l != other.l; }

};

template <typename chan=""></typename>

struct Pixel<chan, rgb_pixel_tag=""> {</chan,>

	typedef rgb_pixel_tag pixel_category;

	typedef Chan channel_type;

public:

	channel_type r, g, b;

public:

	Pixel() : r(), g(), b() {}

	Pixel(channel_type _r, channel_type _g, channel_type _b)

		: r(_r), g(_g), b(_b) {}

	bool operator==(const Pixel &other) const

	{

		return (r == other.r) && (g == other.g) && (g == other.g);

	}

	bool operator!=(const Pixel &other) const

	{

		return (r != other.r) || (g != other.g) || (g != other.g);

	}

};

template <typename chan=""></typename>

struct Pixel<chan, rgbm_pixel_tag=""> {</chan,>

	typedef rgbm_pixel_tag pixel_category;

	typedef Chan channel_type;

public:

	channel_type r, g, b, m;

public:

	Pixel() : r(), g(), b(), m() {}

	Pixel(channel_type _r, channel_type _g, channel_type _b, channel_type _m)

		: r(_r), g(_g), b(_b), m(_m) {}

	bool operator==(const Pixel &other) const

	{

		return (r == other.r) && (g == other.g) && (g == other.g) && (m == other.m);

	}

	bool operator!=(const Pixel &other) const

	{

		return (r != other.r) || (g != other.g) || (g != other.g) || (m != other.m);

	}

};

//***********************************************************

//    Tcg Pixel  traits

//***********************************************************

namespace pixel_ops

{

template <typename chan=""></typename>

struct pixel_traits<pixel<chan, grayscale_pixel_tag="">, grayscale_pixel_tag> {</pixel<chan,>

	typedef Pixel<chan, grayscale_pixel_tag=""> pixel_type;</chan,>

	typedef grayscale_pixel_tag pixel_category;

	typedef Chan channel_type;

	enum { channels_count = 1 };

	static channel_type max_channel_value() { return (std::numeric_limits<channel_type>::max)(); }</channel_type>

	static channel_type l(const pixel_type &pix) { return pix.l; }

	static channel_type &l(pixel_type &pix) { return pix.l; }

};

template <typename chan=""></typename>

struct pixel_traits<pixel<chan, rgb_pixel_tag="">, rgb_pixel_tag> {</pixel<chan,>

	typedef Pixel<chan, rgb_pixel_tag=""> pixel_type;</chan,>

	typedef rgb_pixel_tag pixel_category;

	typedef Chan channel_type;

	enum { channels_count = 3 };

	static channel_type max_channel_value() { return (std::numeric_limits<channel_type>::max)(); }</channel_type>

	static channel_type r(const pixel_type &pix) { return pix.r; }

	static channel_type &r(pixel_type &pix) { return pix.r; }

	static channel_type g(const pixel_type &pix) { return pix.g; }

	static channel_type &g(pixel_type &pix) { return pix.g; }

	static channel_type b(const pixel_type &pix) { return pix.b; }

	static channel_type &b(pixel_type &pix) { return pix.b; }

};

template <typename chan=""></typename>

struct pixel_traits<pixel<chan, rgbm_pixel_tag="">, rgbm_pixel_tag></pixel<chan,>

	: public pixel_traits<pixel<chan, rgb_pixel_tag="">, rgb_pixel_tag> {</pixel<chan,>

	typedef Pixel<chan, rgbm_pixel_tag=""> pixel_type;</chan,>

	typedef rgbm_pixel_tag pixel_category;

	typedef Chan channel_type;

	enum { channels_count = 4 };

	static channel_type m(const pixel_type &pix) { return pix.m; }

	static channel_type &m(pixel_type &pix) { return pix.m; }

};

}

} // namespace tcg::pixel_ops

#endif // TCG_PIXEL_H