Function loop

deps/SDL2/test/testoverlay2.c:179–235

}

void
loop()
{
    SDL_Event event;

    while (SDL_PollEvent(&event)) {
        switch (event.type) {
        case SDL_WINDOWEVENT:
            if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
                SDL_RenderSetViewport(renderer, NULL);
                displayrect.w = window_w = event.window.data1;
                displayrect.h = window_h = event.window.data2;
            }
            break;
        case SDL_MOUSEBUTTONDOWN:
            displayrect.x = event.button.x - window_w / 2;
            displayrect.y = event.button.y - window_h / 2;
            break;
        case SDL_MOUSEMOTION:
            if (event.motion.state) {
                displayrect.x = event.motion.x - window_w / 2;
                displayrect.y = event.motion.y - window_h / 2;
            }
            break;
        case SDL_KEYDOWN:
            if (event.key.keysym.sym == SDLK_SPACE) {
                paused = !paused;
                break;
            }
            if (event.key.keysym.sym != SDLK_ESCAPE) {
                break;
            }
        case SDL_QUIT:
            done = SDL_TRUE;
            break;
        }
    }

#ifndef __EMSCRIPTEN__
    SDL_Delay(fpsdelay);
#endif

    if (!paused) {
        i = (i + 1) % MOOSEFRAMES_COUNT;

        SDL_UpdateTexture(MooseTexture, NULL, MooseFrame[i], MOOSEPIC_W);
    }
    SDL_RenderClear(renderer);
    SDL_RenderCopy(renderer, MooseTexture, NULL, &displayrect);
    SDL_RenderPresent(renderer);

#ifdef __EMSCRIPTEN__
    if (done) {
        emscripten_cancel_main_loop();
    }
#endif
}