Function AllocateRenderCommand

deps/SDL2/src/render/SDL_render.c:296–323

}

static SDL_RenderCommand *
AllocateRenderCommand(SDL_Renderer *renderer)
{
    SDL_RenderCommand *retval = NULL;

    /* !!! FIXME: are there threading limitations in SDL's render API? If not, we need to mutex this. */
    retval = renderer->render_commands_pool;
    if (retval != NULL) {
        renderer->render_commands_pool = retval->next;
        retval->next = NULL;
    } else {
        retval = SDL_calloc(1, sizeof (*retval));
        if (!retval) {
            SDL_OutOfMemory();
            return NULL;
        }
    }

    SDL_assert((renderer->render_commands == NULL) == (renderer->render_commands_tail == NULL));
    if (renderer->render_commands_tail != NULL) {
        renderer->render_commands_tail->next = retval;
    } else {
        renderer->render_commands = retval;
    }
    renderer->render_commands_tail = retval;

    return retval;
}

static int
QueueCmdSetViewport(SDL_Renderer *renderer)