content: /*
   * Copyright 2021 Google LLC
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.material.color.quantize;
  
  /**
   * An interface to allow use of different color spaces by quantizers.
   */
  public interface PointProvider {
      /**
       * The four components in the color space of an sRGB color.
       */
      double[] fromInt(int argb);
  
      /**
       * The ARGB (i.e. hex code) representation of this color.
       */
      int toInt(double[] point);
  
      /**
       * Squared distance between two colors. Distance is defined by scientific color spaces and
       * referred to as delta E.
       */
      double distance(double[] a, double[] b);
  }
  