SDL2 Hello World | SDL2 Getting Started | SDL | OpenGL

main.cpp

// SDL2 Hello, World!
// This should display a white screen for 2 seconds
// compile with: clang++ main.cpp -o hello_sdl2 -lSDL2
// run with: ./hello_sdl2
#include <SDL2/SDL.h>
#include <stdio.h>

#define SCREEN_WIDTH 640
#define SCREEN_HEIGHT 480

int main(int argc, char* args[]) {
  SDL_Window* window = NULL;
  SDL_Surface* screenSurface = NULL;
  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    fprintf(stderr, "could not initialize sdl2: %s\n", SDL_GetError());
    return 1;
  }
  window = SDL_CreateWindow(
			    "hello_sdl2",
			    SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
			    SCREEN_WIDTH, SCREEN_HEIGHT,
			    SDL_WINDOW_SHOWN
			    );
  if (window == NULL) {
    fprintf(stderr, "could not create window: %s\n", SDL_GetError());
    return 1;
  }
  screenSurface = SDL_GetWindowSurface(window);
  SDL_FillRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0xFF, 0xFF, 0xFF));
  SDL_UpdateWindowSurface(window);
  SDL_Delay(2000);
  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;
}

please rename gistfile1.txt to main.cpp

@AshkanLaei done. If you have trouble running this, I can probably help.

Which dependencies are needed to install and to where?

• clang?
• SDL?

Maybe provide link to the downloads we need for out-of-the-box experience?

@eabase do you use Linux or Windows?

if in linux just type:

sudo apt install libsdl2-dev build-essentials

if in windows you need to download from https://libsdl.org, and edit your Makefile to include libSDL (it's a long way)

i only get and the program is not executable
Fatal Error: Out of memory - aborting

i had it running, but just a note for windows users:
https://stackoverflow.com/questions/5259714/undefined-reference-to-winmain16

Fixing the above, just use something like gcc hello.c -o hello -I./include -L./lib -lSDL2 (or whatever)

I have since provided a much more extensive PoC for using SDL2, here.

i managed to run it by running the following commands
g++ c.cpp -o c -lSDL2main -lSDL2&& ./c
anyone need help contact me [email protected]