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74 lines
2.4 KiB
74 lines
2.4 KiB
/*
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.ux.material.libmonet.palettes;
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import static java.lang.Math.max;
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import static java.lang.Math.min;
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import com.google.ux.material.libmonet.hct.Hct;
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/**
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* An intermediate concept between the key color for a UI theme, and a full color scheme. 5 sets of
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* tones are generated, all except one use the same hue as the key color, and all vary in chroma.
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*/
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public final class CorePalette {
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public TonalPalette a1;
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public TonalPalette a2;
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public TonalPalette a3;
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public TonalPalette n1;
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public TonalPalette n2;
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public TonalPalette error;
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/**
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* Create key tones from a color.
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*
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* @param argb ARGB representation of a color
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*/
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public static CorePalette of(int argb) {
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return new CorePalette(argb, false);
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}
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/**
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* Create content key tones from a color.
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*
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* @param argb ARGB representation of a color
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*/
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public static CorePalette contentOf(int argb) {
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return new CorePalette(argb, true);
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}
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private CorePalette(int argb, boolean isContent) {
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Hct hct = Hct.fromInt(argb);
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double hue = hct.getHue();
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double chroma = hct.getChroma();
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if (isContent) {
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this.a1 = TonalPalette.fromHueAndChroma(hue, chroma);
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this.a2 = TonalPalette.fromHueAndChroma(hue, chroma / 3.);
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this.a3 = TonalPalette.fromHueAndChroma(hue + 60., chroma / 2.);
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this.n1 = TonalPalette.fromHueAndChroma(hue, min(chroma / 12., 4.));
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this.n2 = TonalPalette.fromHueAndChroma(hue, min(chroma / 6., 8.));
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} else {
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this.a1 = TonalPalette.fromHueAndChroma(hue, max(48., chroma));
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this.a2 = TonalPalette.fromHueAndChroma(hue, 16.);
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this.a3 = TonalPalette.fromHueAndChroma(hue + 60., 24.);
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this.n1 = TonalPalette.fromHueAndChroma(hue, 4.);
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this.n2 = TonalPalette.fromHueAndChroma(hue, 8.);
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}
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this.error = TonalPalette.fromHueAndChroma(25, 84.);
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}
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}
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