//The Headers
#include "SDL/SDL.h"
#include <string>

//The Attributes of the screen
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;

//The Surfaces That will be used
SDL_Surface*message = NULL;
SDL_Surface*background = NULL;
SDL_Surface*screen = NULL;

SDL_Surface *load_image( std::string filename ) 
{
    //Temporary strogae for the image that is loaded
    SDL_Surface* loadedImage = NULL;
    
    //The optimized image that will be used
    SDL_Surface* optimizedImage = NULL;
    
    //Load the image
    loadedImage = SDL_LoadBMP( filename.c_str() );
    
    //If nothing went wrong in loading the image
    if( loadedImage != NULL )
    {
       //Create an Optimized Image
       optimizedImage = SDL_DisplayFormat( loadedImage ); 
       
       //Free the old image
       SDL_FreeSurface( loadedImage );
       
       //Return the optimized image
       return optimizedImage; 
    }  
    
void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination ) 
{
   //Make a temporary rectangle to hold the offsets
   SDL_Rect offset;
   
   //Give the offsets to the rectangle
   offset.x = x;
   offset.y = y;
   
   //Blit the surface
   SDL_BlitSurface( source, NULL, destination, &offset );
}

int main( int argc, char* args[] ) 
{
   //Initialize all SDL Subsystems
   if( SDL_Init( SDL_INIT_EVERYTHING ) == -1 )
   {
      return 1; 
   }
   
   //Set up the screen
   screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE );
   
   //If there was an error in setting up the screen
   if( screen == NULL )
   {
       return 1;
   }
   
   //Set the window caption
   SDL_WM_SetCaption( "Hello World", NULL );
   
   //Load the images
   message = load_image("hello_world.bmp");
   background = load_image("background.bmp");
   
   //Apply the background to the screen
   apply_surface( 0, 0, background, screen );
   
   //Apply the message to the screen
   apply_surface( 180, 140, message, screen );
   
   //Update the screen
   if( SDL_Flip( screen ) == -1 )
   {
       return 1;
   }
   
   //Wait 2 seconds
   SDL_Delay( 2000 );
   
   //Free the surfaces
   SDL_FreeSurface( message );
   SDL_FreeSurface( background );
   
   //Quit SDL
   SDL_Quit();
   
   //Return
   return 0;          
}
}