static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject clazz,
        jlong rendererPtr, jlong matrixPtr) {
    DisplayListRenderer* renderer = reinterpret_cast<DisplayListRenderer*>(rendererPtr);
    SkMatrix* matrix = reinterpret_cast<SkMatrix*>(matrixPtr);
    renderer->getMatrix(matrix);
}