#pragma once

#ifndef igs_ifx_common_h
#define igs_ifx_common_h

#ifndef IGS_IFX_COMMON_EXPORT
#define IGS_IFX_COMMON_EXPORT
#endif

#define RGBA_ORDER_OF_TOONZ6

namespace igs
{
namespace image
{
#if defined RGBA_ORDER_OF_TOONZ6
// Toonz6, or GDI, TGA order
/*	Exsample:
	igs::image::rgba::num order = igs::image::rgba::red;
	igs::image::rgb::num order = igs::image::rgba::red;
  */
namespace rgba
{
enum num { blu = 0,
		   gre,
		   red,
		   alp,
		   siz };
}
namespace rgb
{
enum num { blu = 0,
		   gre,
		   red,
		   siz };
}
#elif defined RGBA_ORDER_OF_OPENGL
// OpenGL order
namespace rgba
{
enum num { red = 0,
		   gre,
		   blu,
		   alp,
		   siz };
}
namespace rgb
{
enum num { red = 0,
		   gre,
		   blu,
		   siz };
}
#else
Must be define / DRGBA_ORDER_OF_TOONZ6 or / DRGBA_ORDER_OF_OPENGL
#endif

// Direct 3D, Apple Packed Pixel order
// namespace rgba {enum num { alp=0, red, gre, blu, siz }; }

// Direct 3D 10
// namespace rgba {enum num { alp=0, blu, gre, red, siz }; }

template <class T>
void copy_except_margin(
	const T *in, const int margin, T *out, const int hh, const int ww, const int cc)
{
	const T *p_in = in + margin * (ww + margin * 2) * cc + margin * cc;
	T *pout = out;
	for (int yy = margin; yy < hh + margin; ++yy, p_in += 2 * margin * cc) {
		for (int xx = margin; xx < ww + margin; ++xx, p_in += cc, pout += cc) {
			for (int zz = 0; zz < cc; ++zz) {
				pout[zz] = p_in[zz];
			}
		}
	}
}
}
namespace color
{
template <class T>
double ref_value(
	const T *ref, const int cc, const int ref_max, const int ref_mode)
{
	if (igs::image::rgba::siz == cc) {
		using namespace igs::image::rgba;
		switch (ref_mode) {
		case 0:
			return static_cast<double>(ref[red]) / ref_max;
			break;
		case 1:
			return static_cast<double>(ref[gre]) / ref_max;
			break;
		case 2:
			return static_cast<double>(ref[blu]) / ref_max;
			break;
		case 3:
			return static_cast<double>(ref[alp]) / ref_max;
			break;
		case 4:
			return /* 輝度(Luminance)(CCIR Rec.601) */
				0.298912 * static_cast<double>(ref[red]) / ref_max +
				0.586611 * static_cast<double>(ref[gre]) / ref_max +
				0.114478 * static_cast<double>(ref[blu]) / ref_max;
			break;
		}
	} else if (igs::image::rgb::siz == cc) {
		using namespace igs::image::rgb;
		switch (ref_mode) {
		case 0:
			return static_cast<double>(ref[red]) / ref_max;
			break;
		case 1:
			return static_cast<double>(ref[gre]) / ref_max;
			break;
		case 2:
			return static_cast<double>(ref[blu]) / ref_max;
			break;
		case 3:
			return /* 輝度(Luminance)(CCIR Rec.601) */
				0.298912 * static_cast<double>(ref[red]) / ref_max +
				0.586611 * static_cast<double>(ref[gre]) / ref_max +
				0.114478 * static_cast<double>(ref[blu]) / ref_max;
			break;
		}
	} else if (1 == cc) {
		return static_cast<double>(ref[0]) / ref_max;
	}
	return 1.0;
}
}
}

#endif /* !igs_ifx_common_h */