static int android_view_GLES20Canvas_prepareDirty(JNIEnv* env, jobject clazz,
        jlong rendererPtr, jint left, jint top, jint right, jint bottom,
        jboolean opaque) {
    DisplayListRenderer* renderer = reinterpret_cast<DisplayListRenderer*>(rendererPtr);
    return renderer->prepareDirty(left, top, right, bottom, opaque);
}