xref: /aosp_15_r20/external/libmonet/scheme/SchemeFidelity.java (revision 970e10460f970939fd510dd6ad3e0d65908272e3)

/*
 * Copyright 2022 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.ux.material.libmonet.scheme;

import com.google.ux.material.libmonet.dislike.DislikeAnalyzer;
import com.google.ux.material.libmonet.dynamiccolor.DynamicScheme;
import com.google.ux.material.libmonet.dynamiccolor.Variant;
import com.google.ux.material.libmonet.hct.Hct;
import com.google.ux.material.libmonet.palettes.TonalPalette;
import com.google.ux.material.libmonet.temperature.TemperatureCache;

/**
 * A scheme that places the source color in Scheme.primaryContainer.
 *
 * <p>Primary Container is the source color, adjusted for color relativity. It maintains constant
 * appearance in light mode and dark mode. This adds ~5 tone in light mode, and subtracts ~5 tone in
 * dark mode.
 *
 * <p>Tertiary Container is the complement to the source color, using TemperatureCache. It also
 * maintains constant appearance.
 */
public class SchemeFidelity extends DynamicScheme {
  public SchemeFidelity(Hct sourceColorHct, boolean isDark, double contrastLevel) {
    super(
        sourceColorHct,
        Variant.FIDELITY,
        isDark,
        contrastLevel,
        TonalPalette.fromHueAndChroma(sourceColorHct.getHue(), sourceColorHct.getChroma()),
        TonalPalette.fromHueAndChroma(
            sourceColorHct.getHue(),
            Math.max(sourceColorHct.getChroma() - 32.0, sourceColorHct.getChroma() * 0.5)),
        TonalPalette.fromHct(
            DislikeAnalyzer.fixIfDisliked(new TemperatureCache(sourceColorHct).getComplement())),
        TonalPalette.fromHueAndChroma(sourceColorHct.getHue(), sourceColorHct.getChroma() / 8.0),
        TonalPalette.fromHueAndChroma(
            sourceColorHct.getHue(), (sourceColorHct.getChroma() / 8.0) + 4.0));
  }
}