void reduce_1(T const&, image_data_8 & out, octree<rgb> /*trees*/[], unsigned /*limits*/[], std::vector<unsigned> & /*alpha*/) { out.set(0); // only one color!!! }
void reduce_1(T const&, image_data_8 & out, octree<rgb> trees[], unsigned limits[], std::vector<unsigned> & alpha) { out.set(0); // only one color!!! }