//The headers
#include "SDL/SDL.h"
#include <string>
using namespace std;

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

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

//Load the images
SDL_Surface *load_image(string filename)
{
	//Temporary storage for the image that's 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(loadedImage != NULL)
	{
		//Optimized Image Creating
		optimizedImage = SDL_DisplayFormat(loadedImage);
		SDL_FreeSurface(loadedImage);
	}
	
	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 in error in setting up the screen
	if(screen == NULL)
	{
		return 1;
	}

	//Set the window caption
	SDL_WM_SetCaption( "Hello World blaat", 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;
}