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

using namespace std;
class buffering
{
	private: 
		BITMAP * buffer;
		vector<BITMAP *> bitmaps;

	public:
		buffering()
		{
			buffer=create_bitmap(SCREEN_W,SCREEN_H);
		}
		void add_bitmap(BITMAP *picture,int x=0,int y=0)
		{
			draw_sprite(buffer,picture,x,y);
			bool exists=false;
			for(int i=0;i<bitmaps.size();i++)
			{
				if(picture==bitmaps[i])
				{
					exists=true;
				}
			}
			if(!exists)
			{
				bitmaps.push_back(picture);
			}
		}
		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);
			bool exists=false;
			for(int i=0;i<bitmaps.size();i++)
			{
				if(picture==bitmaps[i])
				{
					exists=true;
				}
			}
			if(!exists)
			{
				bitmaps.push_back(picture);
			}
		}
		void render()
		{
			vsync();
			draw_sprite(screen,buffer,0,0);
		}
		~buffering()
		{
			for(int i=0;i<bitmaps.size();i++)
			{
				destroy_bitmap(bitmaps[i]);
			}
		}
};
void setup()
{
    allegro_init();
	set_color_depth(16);
	install_keyboard();
	install_mouse();
	install_timer(); /*don't know if you need this*/
    if (set_gfx_mode(GFX_AUTODETECT_WINDOWED,1024,768,0,0)!=0)
	{
		set_gfx_mode(GFX_TEXT,0,0,0,0);
		allegro_message(allegro_error);
		exit(1);
	}
	show_mouse(screen);
}

int main(void)
{
	setup();
	buffering game_screen;
    BITMAP *title,*test;
    title = load_bitmap("images/title.bmp", NULL);
	test = load_bitmap("images/test.bmp", NULL);
	if(!title)
	{
		allegro_message("Error loading title.bmp");
		return 1;
	}
	while(!key[KEY_ESC])
	{
		game_screen.add_stretched_bitmap(title,0,0);
		game_screen.add_bitmap(test,255,255);
		game_screen.render();
		rest(120);
	}
    allegro_exit();
	return 0;
}
END_OF_MAIN()