/*
 * Copyright 2021 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.
 *
 * ---------------------------------------------------------------------
 *
 * Portions of this file were modified and ported to Vala by Victor Vintorez in 2026.
 * These modifications are licensed under the European Union Public License (EUPL),
 * Version 1.2 or later. You may obtain a copy of the License at:
 * https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12
 */

using GLib;

namespace MaterialColorUtilities {
	/** An interface to allow use of different color spaces by quantizers. */
	public interface PointProvider : Object {
		/** The four components in the color space of an sRGB color. */
		public abstract double[] from_int(int argb);

		/** The ARGB (i.e. hex code) representation of this color. */
		public abstract int to_int(double[] point);

		/**
		 * Squared distance between two colors. Distance is defined by scientific color spaces and
		 * referred to as delta E.
		 */
		public abstract double distance(double[] a, double[] b);
	}
}
