SDL2 Hello World | SDL2 Getting Started | SDL | OpenGL

gistfile1.txt

// SDL2 Hello, World!
// This should display a white screen for 2 seconds
// 
// sudo apt install libsdl2-dev
// sudo apt install clang
// 
// clang main.c -o hello_sdl2_clang -lSDL2
// clang++ main.cpp -o hello_sdl2_clangpp -lSDL2
// gcc main.c -o hello_sdl2_gcc -lSDL2
// g++ main.cpp -o hello_sdl2_gpp -lSDL2

#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_version compiled;
  SDL_version linked;

  SDL_VERSION(&compiled);
  SDL_GetVersion(&linked);
  printf("We compiled against SDL version %d.%d.%d ...\n",
      compiled.major, compiled.minor, compiled.patch);
  printf("But we are linking against SDL version %d.%d.%d.\n",
      linked.major, linked.minor, linked.patch);

  SDL_Delay(2000);
  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;
}