Resizing and Graphical Content

1#include <SDL.h>
2#include <iostream>
3
Draw a Rectangle|Show
4void DrawRectangle(SDL_Renderer*, int, int) {/*...*/};
16
17int main() {
18  SDL_Init(SDL_INIT_VIDEO);
19
20  SDL_Window* window =
21    SDL_CreateWindow("Resize Example",
22                     SDL_WINDOWPOS_CENTERED,
23                     SDL_WINDOWPOS_CENTERED,
24                     400, 400,
25                     SDL_WINDOW_RESIZABLE);
26
27  SDL_Renderer* renderer =
28    SDL_CreateRenderer(
29      window, -1, SDL_RENDERER_ACCELERATED);
30
31  bool running = true;
32  SDL_Event event;
33
34  while (running) {
35    while (SDL_PollEvent(&event)) {
36      if (event.type == SDL_QUIT) {
37        running = false;
38      }
39
40      if (event.type == SDL_WINDOWEVENT &&
41        (event.window.event ==
42          SDL_WINDOWEVENT_SIZE_CHANGED ||
43          event.window.event ==
44          SDL_WINDOWEVENT_RESIZED)) {
45        int width, height;
46        SDL_GetWindowSize(window, &width,
47                          &height);
48
49        SDL_SetRenderDrawColor(
50          renderer, 0, 0, 0, 255);
51        SDL_RenderClear(renderer);
52        DrawRectangle(renderer, width, height);
53        SDL_RenderPresent(renderer);
54      }
55    }
56  }
57
58  SDL_DestroyRenderer(renderer);
59  SDL_DestroyWindow(window);
60  SDL_Quit();
61
62  return 0;
63}