/** @file Texture.h
 * @brief Defines a method for loading textures.
 * 
 * This file gives facilities for easily loading and binding textures.
 */

#ifndef TEXTURE_H
#define TEXTURE_H

#include <common.h>

/**
 * When defined, DEBUG allows extra messages to be printed to the terminal for
 * debugging purposes.
 */

#define DEBUG

/**
 * Texture functions are given a namespace for better organization.
 */

namespace Texture{
	
	/**
	 * Loads a texture from the given file name, returning the GLuint used for
	 * later referencing of the texture.
	 */
	
	GLuint loadTexture(const char *fileName);
	
	void freeTextures(void);
	
	void initColorIndex();
	vec2 getIndex(Color c);
}

/**
 * The Texturec class.
 * 
 * This class can handle an array of textures and allows easy binding of those
 * textures.
 */

class Texturec{
private:

	/**
	 * Contains the index in the image array of the currently loaded texture.
	 */

	unsigned int texState;
	
public:

	/**
	 * Contains an array of the GLuints returned from Texture::loadTexture().
	 */

	GLuint *image = NULL;
	
	/**
	 * Populates the image array from a list of strings, with each string as a
	 * separate argument.
	 */
	
	Texturec(uint amt, ...);
	
	/**
	 * Populates the image array from an array of strings.
	 */
	
	Texturec(uint amt,const char **paths);
	
	/**
	 * Frees memory taken by the image array.
	 */
	
	~Texturec();
	
	/**
	 * Binds the next texture in the array, incrementing texState.
	 */
	
	void bindNext();
	
	/**
	 * Binds the previous texture in the array, decrementing texState.
	 */
	
	void bindPrev();
	
	/**
	 * Binds the texture with the provided index.
	 */
	
	void bind(unsigned int);
};

#endif //TEXTURE_H