/*
   render/textures.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_RENDER_TEXTURES_H__
#define __INCLUDED_RENDER_TEXTURES_H__

#include <string>
#include <map>

#include "model/material.h"
#include "render/gl.h"

namespace render
{

const size_t MAXTEXTURES = 256;

/// Texture managment
class Textures
{
public:
	/// Initialize the textures registry
	static void init();

	/// Shutdown the textures registry
	static void shutdown();

	/// load the environment cubemap
	static void load_cubemap(const std::string & name);
	
	/// Load a texture
	/** Returns 0 on failure, and the texture index on success
	 */
	static size_t load(const std::string & name, const bool filter = true);

	static size_t load(const char *name, const bool filter = true);

	/// bind a texture for OpenGL usage
	/** Returns 0 on failure, and the texture index on success
	 */
	static size_t bind(const std::string &name, const bool filter = true);

	static size_t bind(const char *name, const bool filter = true);

	/// bind a texture for OpenGL usage
	static size_t bind(const size_t texture, const bool filter = true);

	/// find the texture index for a given name
	static size_t find(const std::string &name);

	/// unload a texture
	static void unload(const size_t id);

	/// unload a texture
	static void unload(const std::string &name);

	/// list loaded textures
	static void list();

	/// material image loader hook
	static void image_loader(model::Layer *layer);

private:
	static void clear();

	typedef std::map<std::string, size_t>::iterator iterator;

	static math::Vector2f texture_size[MAXTEXTURES];
	static std::map<std::string, size_t> registry;
	static GLuint textures[MAXTEXTURES];
	static GLuint textures_cubemap_id;
};

}

#endif // __INCLUDED_RENDER_TEXTURES_H__