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ffbefaf477
- Assumes only the Dart VM is interested in idle notification. - Gives the VM the time remaining in each frame. - Gives the VM 100ms if there is no pending frame. Issue flutter/flutter#9594
24 lines
866 B
Java
24 lines
866 B
Java
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package io.flutter.view;
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import android.view.Choreographer;
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public class VsyncWaiter {
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// This estimate will be updated by FlutterView when it is attached to a Display.
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public static long refreshPeriodNanos = 1000000000 / 60;
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public static void asyncWaitForVsync(final long cookie) {
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Choreographer.getInstance().postFrameCallback(new Choreographer.FrameCallback() {
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@Override
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public void doFrame(long frameTimeNanos) {
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nativeOnVsync(frameTimeNanos, frameTimeNanos + refreshPeriodNanos, cookie);
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}
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});
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}
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private static native void nativeOnVsync(long frameTimeNanos, long frameTargetTimeNanos, long cookie);
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}
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