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/*
* Copyright 2021 The Android Open Source Project
*
* 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.
*/
package android.gui;
import android.gui.BitTube;
import android.gui.ParcelableVsyncEventData;
/** @hide */
interface IDisplayEventConnection {
/*
* stealReceiveChannel() returns a BitTube to receive events from. Only the receive file
* descriptor of outChannel will be initialized, and this effectively "steals" the receive
* channel from the remote end (such that the remote end can only use its send channel).
*/
void stealReceiveChannel(out BitTube outChannel);
/*
* setVsyncRate() sets the vsync event delivery rate. A value of 1 returns every vsync event.
* A value of 2 returns every other event, etc. A value of 0 returns no event unless
* requestNextVsync() has been called.
*/
void setVsyncRate(in int count);
/*
* requestNextVsync() schedules the next vsync event. It has no effect if the vsync rate is > 0.
*/
oneway void requestNextVsync(); // Asynchronous
/*
* getLatestVsyncEventData() gets the latest vsync event data.
*/
ParcelableVsyncEventData getLatestVsyncEventData();
}
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