Merge "Adding a wrapper around Tonal API" into pi-dev

/*

 * Copyright (C) 2018 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.systemui.shared.system;

import android.app.WallpaperColors;

import android.content.Context;

import com.android.internal.colorextraction.ColorExtractor.GradientColors;

import com.android.internal.colorextraction.types.Tonal;

public class TonalCompat {

    private final Tonal mTonal;

    public TonalCompat(Context context) {

        mTonal = new Tonal(context);

    }

    public ExtractionInfo extractDarkColors(WallpaperColors colors) {

        GradientColors darkColors = new GradientColors();

        mTonal.extractInto(colors, new GradientColors(), darkColors, new GradientColors());

        ExtractionInfo result = new ExtractionInfo();

        result.mainColor = darkColors.getMainColor();

        result.secondaryColor = darkColors.getSecondaryColor();

        result.supportsDarkText = darkColors.supportsDarkText();

        if (colors != null) {

            result.supportsDarkTheme =

                    (colors.getColorHints() & WallpaperColors.HINT_SUPPORTS_DARK_THEME) != 0;

        }

        return result;

    }

    public static class ExtractionInfo {

        public int mainColor;

        public int secondaryColor;

        public boolean supportsDarkText;

        public boolean supportsDarkTheme;

    }

}