content: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * 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.android.internal.colorextraction.types;
  
  import android.app.WallpaperColors;
  
  import com.android.internal.colorextraction.ColorExtractor;
  
  /**
   * Interface to allow various color extraction implementations.
   */
  public interface ExtractionType {
  
      /**
       * Executes color extraction by reading WallpaperColors and setting
       * main and secondary colors on GradientColors.
       *
       * Extraction is expected to happen with 3 different gradient types:
       *     Normal, with the main extracted colors
       *     Dark, with extra contrast
       *     ExtraDark, for places where GAR is mandatory, like the emergency dialer
       *
       * @param inWallpaperColors where to read from
       * @param outGradientColorsNormal object that should receive normal colors
       * @param outGradientColorsDark object that should receive dark colors
       * @param outGradientColorsExtraDark object that should receive extra dark colors
       */
      void extractInto(WallpaperColors inWallpaperColors,
              ColorExtractor.GradientColors outGradientColorsNormal,
              ColorExtractor.GradientColors outGradientColorsDark,
              ColorExtractor.GradientColors outGradientColorsExtraDark);
  }
  