/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_COLOUR_H )
#define INCLUDED_COLOUR_H

#include "ientity.h"
#include "irender.h"

#include "math/vector.h"
#include "eclasslib.h"
#include "generic/callback.h"
#include "stringio.h"

inline void default_colour(Vector3 &colour)
{
	colour = Vector3(1, 1, 1);
}

inline void read_colour(Vector3 &colour, const char *value)
{
	if (!string_parse_vector3(value, colour)) {
		default_colour(colour);
	}
}

inline void read_colour255(Vector3 &colour, const char *value)
{
	if (!string_parse_vector3(value, colour)) {
		default_colour(colour);
	} else {
		colour[0] /= 255;
		colour[1] /= 255;
		colour[2] /= 255;
	}
}

inline void write_colour(const Vector3 &colour, Entity *entity)
{
	char value[64];

	sprintf(value, "%f %f %f", colour[0], colour[1], colour[2]);
	entity->setKeyValue("_color", value);
}

class Colour {
Callback<void()> m_colourChanged;
Shader *m_state;

void capture_state()
{
	m_state = colour_capture_state_fill(m_colour);
}

void release_state()
{
	colour_release_state_fill(m_colour);
}

public:
Vector3 m_colour;

Colour(const Callback<void()> &colourChanged)
	: m_colourChanged(colourChanged)
{
	default_colour(m_colour);
	capture_state();
}

~Colour()
{
	release_state();
}

void colourChanged(const char *value)
{
	release_state();
	read_colour(m_colour, value);
	capture_state();

	m_colourChanged();
}

void colour255Changed(const char *value)
{
	release_state();
	read_colour255(m_colour, value);
	capture_state();

	m_colourChanged();
}

typedef MemberCaller<Colour, void (const char *), &Colour::colourChanged> ColourChangedCaller;
typedef MemberCaller<Colour, void (const char *), &Colour::colour255Changed> Colour255ChangedCaller;


void write(Entity *entity) const
{
	write_colour(m_colour, entity);
}

Shader *state() const
{
	return m_state;
}
};

#endif