#include <allegro.h>
#include <string>
#include <vector>

using namespace std;
#ifndef BUFFERING
#define BUFFERING
class buffering
{
	private: 
		// we'l need a buffer and a vector to hold reference to location of bitmaps.
		BITMAP * buffer;
		vector<BITMAP *> bitmaps;

	public:
		buffering()
		{
			// the buffer needs to be the entire screen
			// so we use allegro defined variables to make it so.
			buffer=create_bitmap(SCREEN_W,SCREEN_H);
		}
		void mark_bitmap_for_deletion(BITMAP *picture)
		{
			bitmaps.push_back(picture);
		}

		// this is just a wrapper for load_bitmap so we can add their memory locations
		// into a vector for automatic deletion later on.
		void add_bitmap(BITMAP *picture,int x=0,int y=0)
		{
			draw_sprite(buffer,picture,x,y);
		}

		// same thign as above
		void add_stretched_bitmap(BITMAP * picture,int x=0, int y=0,int width=SCREEN_W, int height=SCREEN_H)
		{
			stretch_sprite(buffer,picture,x,y,width,height);
		}

		// draw the buffer to the screen
		void render()
		{
			vsync();
			blit(buffer,screen,0,0,0,0,SCREEN_W,SCREEN_H);
			rest(5);
		}

		//dynamically destroy all the bitmaps. good stuff. :-D
		// beats the hell out of 20 million calls to destroy_bitmap
		~buffering()
		{
			for(int i=0;i<bitmaps.size();i++)
			{
				destroy_bitmap(bitmaps[i]);
			}
			bitmaps.empty();
		}
};

#endif