render_queue_high = g_queue_new ();
render_queue_low = g_queue_new ();
async_render_queue_high = g_queue_new ();
async_render_queue_low = g_queue_new ();
thumbnail_queue_high = g_queue_new ();
thumbnail_queue_low = g_queue_new ();
render_queue_high = g_queue_new ();
render_queue_low = g_queue_new ();
async_render_queue_high = g_queue_new ();
async_render_queue_low = g_queue_new ();
thumbnail_queue_high = g_queue_new ();
thumbnail_queue_low = g_queue_new ();