SDLhello.cpp

#include "SDL.h"
#include <string>

const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;

SDL_Surface* message = NULL;
SDL_Surface* screen = NULL;
SDL_Surface* background = NULL;
SDL_Surface* load_image(std::string filename) {
    SDL_Surface* loadedImage = NULL;
    SDL_Surface* optimizedImage = NULL;
    loadedImage = SDL_LoadBMP(filename.c_str());
    if(loadedImage != NULL) {
    optimizedImage = SDL_DisplayFormat(loadedImage);
        SDL_FreeSurface(loadedImage);
    }
    return optimizedImage;
}

void apply_surface(int x, int y, SDL_Surface* source, SDL_Surface* destination) {
    SDL_Rect offset;
    offset.x = x;
    offset.y = y;
    SDL_BlitSurface(source,NULL,destination,&offset);
}
int main( int argc, char* args[] ) {
    if(SDL_Init(SDL_INIT_EVERYTHING) == -1)
        return 1;
    screen = SDL_SetVideoMode(SCREEN_WIDTH,SCREEN_HEIGHT,SCREEN_BPP,SDL_SWSURFACE);
    SDL_WM_SetCaption("Hello World",NULL);
    message = load_image("hello.bmp");
    background = load_image("background.bmp");
    apply_surface(0,0,background,screen);
    apply_surface(320,0,background,screen);
    apply_surface(0,240,background,screen);
    apply_surface(320,240,background,screen);
    apply_surface(180,140,message,screen);
    if(SDL_Flip(screen) == -1)
        return 1;
    SDL_Delay(5000);
    SDL_FreeSurface(message);
    SDL_FreeSurface(background);
    SDL_Quit();
    return 0;
}