1*970e1046SAndroid Build Coastguard Worker /* 2*970e1046SAndroid Build Coastguard Worker * Copyright 2021 Google LLC 3*970e1046SAndroid Build Coastguard Worker * 4*970e1046SAndroid Build Coastguard Worker * Licensed under the Apache License, Version 2.0 (the "License"); 5*970e1046SAndroid Build Coastguard Worker * you may not use this file except in compliance with the License. 6*970e1046SAndroid Build Coastguard Worker * You may obtain a copy of the License at 7*970e1046SAndroid Build Coastguard Worker * 8*970e1046SAndroid Build Coastguard Worker * http://www.apache.org/licenses/LICENSE-2.0 9*970e1046SAndroid Build Coastguard Worker * 10*970e1046SAndroid Build Coastguard Worker * Unless required by applicable law or agreed to in writing, software 11*970e1046SAndroid Build Coastguard Worker * distributed under the License is distributed on an "AS IS" BASIS, 12*970e1046SAndroid Build Coastguard Worker * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*970e1046SAndroid Build Coastguard Worker * See the License for the specific language governing permissions and 14*970e1046SAndroid Build Coastguard Worker * limitations under the License. 15*970e1046SAndroid Build Coastguard Worker */ 16*970e1046SAndroid Build Coastguard Worker 17*970e1046SAndroid Build Coastguard Worker package com.google.ux.material.libmonet.quantize; 18*970e1046SAndroid Build Coastguard Worker 19*970e1046SAndroid Build Coastguard Worker /** An interface to allow use of different color spaces by quantizers. */ 20*970e1046SAndroid Build Coastguard Worker public interface PointProvider { 21*970e1046SAndroid Build Coastguard Worker /** The four components in the color space of an sRGB color. */ fromInt(int argb)22*970e1046SAndroid Build Coastguard Worker public double[] fromInt(int argb); 23*970e1046SAndroid Build Coastguard Worker 24*970e1046SAndroid Build Coastguard Worker /** The ARGB (i.e. hex code) representation of this color. */ toInt(double[] point)25*970e1046SAndroid Build Coastguard Worker public int toInt(double[] point); 26*970e1046SAndroid Build Coastguard Worker 27*970e1046SAndroid Build Coastguard Worker /** 28*970e1046SAndroid Build Coastguard Worker * Squared distance between two colors. Distance is defined by scientific color spaces and 29*970e1046SAndroid Build Coastguard Worker * referred to as delta E. 30*970e1046SAndroid Build Coastguard Worker */ distance(double[] a, double[] b)31*970e1046SAndroid Build Coastguard Worker public double distance(double[] a, double[] b); 32*970e1046SAndroid Build Coastguard Worker } 33