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