150 lines
4.1 KiB
Java
150 lines
4.1 KiB
Java
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package de.bluecolored.bluemap.core.util.math;
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public class Color {
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public float r, g, b, a;
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public boolean premultiplied;
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public Color set(float r, float g, float b, float a, boolean premultiplied) {
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this.r = r;
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this.g = g;
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this.b = b;
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this.a = a;
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this.premultiplied = premultiplied;
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return this;
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}
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public Color set(Color color) {
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this.r = color.r;
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this.g = color.g;
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this.b = color.b;
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this.a = color.a;
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this.premultiplied = color.premultiplied;
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return this;
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}
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public Color set(int color) {
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this.r = ((color >> 16) & 0xFF) / 255f;
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this.g = ((color >> 8) & 0xFF) / 255f;
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this.b = (color & 0xFF) / 255f;
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this.a = ((color >> 24) & 0xFF) / 255f;
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this.premultiplied = false;
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if (this.a == 0) this.a = 1f; // if the given integer does not define an alpha, we assume 1f
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return this;
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}
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public Color add(Color color) {
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if (color.a < 1f && !color.premultiplied){
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throw new IllegalArgumentException("Can only add premultiplied colors with alpha!");
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}
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premultiplied();
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this.r += color.r;
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this.g += color.g;
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this.b += color.b;
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this.a += color.a;
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return this;
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}
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public Color multiply(Color color) {
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if (color.premultiplied) premultiplied();
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else straight();
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this.r *= color.r;
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this.g *= color.g;
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this.b *= color.b;
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this.a *= color.a;
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return this;
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}
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public Color overlay(Color color) {
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if (color.a < 1f && !color.premultiplied) throw new IllegalArgumentException("Can only overlay premultiplied colors with alpha!");
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premultiplied();
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float p = 1 - color.a;
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this.a = p * this.a + color.a;
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this.r = p * this.r + color.r;
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this.g = p * this.g + color.g;
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this.b = p * this.b + color.b;
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return this;
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}
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public Color flatten() {
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if (this.a == 1f) return this;
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if (premultiplied) {
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this.r /= this.a;
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this.g /= this.a;
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this.b /= this.a;
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}
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this.a = 1f;
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return this;
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}
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public Color premultiplied() {
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if (!premultiplied) {
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this.r *= this.a;
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this.g *= this.a;
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this.b *= this.a;
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this.premultiplied = true;
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}
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return this;
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}
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public Color straight() {
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if (premultiplied) {
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float m = 1f / this.a;
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this.r *= m;
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this.g *= m;
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this.b *= m;
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this.premultiplied = false;
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}
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return this;
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}
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@Override
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public String toString() {
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return "Color{" +
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"r=" + r +
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", g=" + g +
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", b=" + b +
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", a=" + a +
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", premultiplied=" + premultiplied +
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'}';
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}
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}
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