mathnumgraph

// 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>
#include <SDL2/SDL2_gfxPrimitives.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;
    }

    SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0);
    screenSurface = SDL_GetWindowSurface(window);
    SDL_FillRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0xFF, 0xFF, 0xFF));

    filledCircleColor(renderer, 320, 240, 10, 0x0000FFFF);

    SDL_RenderPresent(renderer);
    SDL_UpdateWindowSurface(window);
    SDL_Delay(2000);
    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}