Function main

deps/SDL2/Xcode-iOS/Demos/src/fireworks.c:362–474

}

int
main(int argc, char *argv[])
{
    SDL_Window *window;         /* main window */
    SDL_GLContext context;
    int drawableW, drawableH;
    int done;                   /* should we clean up and exit? */

    /* initialize SDL */
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        fatalError("Could not initialize SDL");
    }
    /* seed the random number generator */
    srand(time(NULL));
    /*
       request some OpenGL parameters
       that may speed drawing
     */
    SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6);
    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
    SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 0);
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
    SDL_GL_SetAttribute(SDL_GL_RETAINED_BACKING, 0);
    SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);

    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);

    /* create main window and renderer */
    window = SDL_CreateWindow(NULL, 0, 0, 320, 480,
                                SDL_WINDOW_OPENGL | SDL_WINDOW_BORDERLESS | SDL_WINDOW_ALLOW_HIGHDPI);
    context = SDL_GL_CreateContext(window);

    /* The window size and drawable size may be different when highdpi is enabled,
     * due to the increased pixel density of the drawable. */
    SDL_GetWindowSize(window, &screen_w, &screen_h);
    SDL_GL_GetDrawableSize(window, &drawableW, &drawableH);

    /* In OpenGL, point sizes are always in pixels. We don't want them looking
     * tiny on a retina screen. */
    pointSizeScale = (float) drawableH / (float) screen_h;

    /* load the particle texture */
    initializeTexture();

    /*      check if GL_POINT_SIZE_ARRAY_OES is supported
       this is used to give each particle its own size
     */
    pointSizeExtensionSupported =
        SDL_GL_ExtensionSupported("GL_OES_point_size_array");

    /* set up some OpenGL state */
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_CULL_FACE);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();