1
2/*
3 * Copyright (C) 2012 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.gallery3d.ui;
19
20import android.os.SystemClock;
21
22//
23// The animation time should ideally be the vsync time the frame will be
24// displayed, but that is an unknown time in the future. So we use the system
25// time just after eglSwapBuffers (when GLSurfaceView.onDrawFrame is called)
26// as a approximation.
27//
28public class AnimationTime {
29    private static volatile long sTime;
30
31    // Sets current time as the animation time.
32    public static void update() {
33        sTime = SystemClock.uptimeMillis();
34    }
35
36    // Returns the animation time.
37    public static long get() {
38        return sTime;
39    }
40
41    public static long startTime() {
42        sTime = SystemClock.uptimeMillis();
43        return sTime;
44    }
45}
46