static void android_view_GLES20Canvas_drawLayer(JNIEnv* env, jobject clazz,
        jlong rendererPtr, jlong layerPtr, jfloat x, jfloat y) {
    DisplayListRenderer* renderer = reinterpret_cast<DisplayListRenderer*>(rendererPtr);
    DeferredLayerUpdater* layer = reinterpret_cast<DeferredLayerUpdater*>(layerPtr);
    renderer->drawLayer(layer, x, y);
}