void Layer::defer(const OpenGLRenderer& rootRenderer) {
    ATRACE_LAYER_WORK("Optimize");

    updateLightPosFromRenderer(rootRenderer);
    const float width = layer.getWidth();
    const float height = layer.getHeight();

    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
        dirtyRect.set(0, 0, width, height);
    }

    deferredList.reset(new DeferredDisplayList(dirtyRect));

    DeferStateStruct deferredState(*deferredList, *renderer,
            RenderNode::kReplayFlag_ClipChildren);

    renderer->setViewport(width, height);
    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
            dirtyRect.right, dirtyRect.bottom, !isBlend());

    renderNode->computeOrdering();
    renderNode->defer(deferredState, 0);

    deferredUpdateScheduled = false;
}
void Layer::defer() {
    const float width = layer.getWidth();
    const float height = layer.getHeight();

    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
        dirtyRect.set(0, 0, width, height);
    }

    if (deferredList) {
        deferredList->reset(dirtyRect);
    } else {
        deferredList = new DeferredDisplayList(dirtyRect);
    }
    DeferStateStruct deferredState(*deferredList, *renderer,
            DisplayList::kReplayFlag_ClipChildren);

    renderer->initViewport(width, height);
    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
            dirtyRect.right, dirtyRect.bottom, !isBlend());

    displayList->defer(deferredState, 0);

    deferredUpdateScheduled = false;
}