import std.stdio;
import derelict.sdl2.sdl;



void main()
{
    DerelictSDL2.load();

    SDL_Window* window = null;
    SDL_Surface* screenSurface = null;

    if(init(window, screenSurface)) {
            SDL_UpdateWindowSurface(window);

            SDL_Delay(2000);
    }





    if(close(window, screenSurface)) writeln("Success.");

}

bool init(ref SDL_Window* window, ref SDL_Surface* screenSurface) {
    if( SDL_Init( SDL_INIT_VIDEO ) < 0 ) {
        writefln( "SDL could not initialize! SDL_Error: %s", SDL_GetError());
        return false;
    }
    Screen screen;
    window = SDL_CreateWindow( "SDL Tutorial", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
                                screen.width, screen.height, SDL_WINDOW_SHOWN);
    if(!window) {
        writeln("Failed to open window. SDL error : %s", SDL_GetError());
        return false;
    } else {
        screenSurface = SDL_GetWindowSurface(window);
    }

    return true;
}


bool close(ref SDL_Window* window, ref SDL_Surface* screenSurface) {
    if(screenSurface) {
        SDL_FreeSurface(screenSurface);
        screenSurface = null;
    }
    if(window) {
        SDL_DestroyWindow(window);
        window = null;
    }
    SDL_Quit();

    return true;
}

struct Screen {
        const int width = 640;
        const int height = 480;
}