diff options
Diffstat (limited to 'android/source/src/java/org/mozilla/gecko/gfx/PointUtils.java')
-rw-r--r-- | android/source/src/java/org/mozilla/gecko/gfx/PointUtils.java | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/android/source/src/java/org/mozilla/gecko/gfx/PointUtils.java b/android/source/src/java/org/mozilla/gecko/gfx/PointUtils.java new file mode 100644 index 0000000000..4eff380527 --- /dev/null +++ b/android/source/src/java/org/mozilla/gecko/gfx/PointUtils.java @@ -0,0 +1,53 @@ +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +package org.mozilla.gecko.gfx; + +import android.graphics.Point; +import android.graphics.PointF; + +import org.json.JSONException; +import org.json.JSONObject; + +import java.lang.StrictMath; + +public final class PointUtils { + public static PointF add(PointF one, PointF two) { + return new PointF(one.x + two.x, one.y + two.y); + } + + public static PointF subtract(PointF one, PointF two) { + return new PointF(one.x - two.x, one.y - two.y); + } + + public static PointF scale(PointF point, float factor) { + return new PointF(point.x * factor, point.y * factor); + } + + public static Point round(PointF point) { + return new Point(Math.round(point.x), Math.round(point.y)); + } + + /* Computes the magnitude of the given vector. */ + public static float distance(PointF point) { + return (float)StrictMath.hypot(point.x, point.y); + } + + /** Computes the scalar distance between two points. */ + public static float distance(PointF one, PointF two) { + return PointF.length(one.x - two.x, one.y - two.y); + } + + public static JSONObject toJSON(PointF point) throws JSONException { + // Ensure we put ints, not longs, because Gecko message handlers call getInt(). + int x = Math.round(point.x); + int y = Math.round(point.y); + JSONObject json = new JSONObject(); + json.put("x", x); + json.put("y", y); + return json; + } +} + |