michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.gfx;
michael@0: 
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: 
michael@0: import android.graphics.Point;
michael@0: import android.graphics.PointF;
michael@0: 
michael@0: public final class PointUtils {
michael@0:     public static PointF add(PointF one, PointF two) {
michael@0:         return new PointF(one.x + two.x, one.y + two.y);
michael@0:     }
michael@0: 
michael@0:     public static PointF subtract(PointF one, PointF two) {
michael@0:         return new PointF(one.x - two.x, one.y - two.y);
michael@0:     }
michael@0: 
michael@0:     public static PointF scale(PointF point, float factor) {
michael@0:         return new PointF(point.x * factor, point.y * factor);
michael@0:     }
michael@0: 
michael@0:     public static Point round(PointF point) {
michael@0:         return new Point(Math.round(point.x), Math.round(point.y));
michael@0:     }
michael@0: 
michael@0:    /* Computes the magnitude of the given vector. */
michael@0:    public static float distance(PointF point) {
michael@0:         return (float)Math.sqrt(point.x * point.x + point.y * point.y);
michael@0:    }
michael@0: 
michael@0:     /** Computes the scalar distance between two points. */
michael@0:     public static float distance(PointF one, PointF two) {
michael@0:         return PointF.length(one.x - two.x, one.y - two.y);
michael@0:     }
michael@0: 
michael@0:     public static JSONObject toJSON(PointF point) throws JSONException {
michael@0:         // Ensure we put ints, not longs, because Gecko message handlers call getInt().
michael@0:         int x = Math.round(point.x);
michael@0:         int y = Math.round(point.y);
michael@0:         JSONObject json = new JSONObject();
michael@0:         json.put("x", x);
michael@0:         json.put("y", y);
michael@0:         return json;
michael@0:     }
michael@0: }
michael@0: