#pragma once
#ifndef BUFFER
#define BUFFER

#include <vector>
#include <GL/glew.h>

#include "mesh.h"

struct meshDesc
{
	meshDesc() : mesh(0), vertexOffset(0), vertexSize(0), texCoordOffset(0), texCoordSize(0), normalOffset(0), normalSize(0), vbo(0)
	{
	}
	
	Xr_Mesh *mesh;
	unsigned int vertexOffset;
	unsigned int vertexSize;
	unsigned int texCoordOffset;
	unsigned int texCoordSize;
	unsigned int normalOffset;
	unsigned int normalSize;
	GLuint vbo;
};

class Xr_BufferManager
{
	public:
		Xr_BufferManager();
		~Xr_BufferManager();
		
		static Xr_BufferManager* getInstance();
		static bool instanced();
		static void quitInstance();
		
		bool load(Xr_Mesh*);
		void unload(Xr_Mesh*);
		void unloadAll();
		
		void fetchVertex(Xr_Mesh*);
		void fetchTexCoord(Xr_Mesh*);
		void fetchNormal(Xr_Mesh*);
		void fetchNull();
		
	private:
	
		static Xr_BufferManager* B_instance;
		std::vector<meshDesc> B_meshList;
};

#endif