SDL/cmake/test/main_gui.c

#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>

int main(int argc, char *argv[])
{
    SDL_Window *window = NULL;
    SDL_Surface *screenSurface = NULL;
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        SDL_Log("Could not initialize SDL: %s\n", SDL_GetError());
        return 1;
    }
    window = SDL_CreateWindow("Hello SDL", 640, 480, 0);
    if (window == NULL) {
        SDL_Log("could not create window: %s\n", SDL_GetError());
        return 1;
    }
    screenSurface = SDL_GetWindowSurface(window);
    SDL_FillSurfaceRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0xff, 0xff, 0xff));
    SDL_UpdateWindowSurface(window);
    SDL_Delay(100);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 0;
}