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/*
* Copyright (C) 2011 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.
*/
#pragma once
#include <binder/IInterface.h>
#include <binder/SafeInterface.h>
#include <utils/Errors.h>
#include <cstdint>
namespace android {
namespace gui {
class BitTube;
} // namespace gui
class IDisplayEventConnection : public IInterface {
public:
DECLARE_META_INTERFACE(DisplayEventConnection)
/*
* 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).
*/
virtual status_t stealReceiveChannel(gui::BitTube* outChannel) = 0;
/*
* 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.
*/
virtual status_t setVsyncRate(uint32_t count) = 0;
/*
* requestNextVsync() schedules the next vsync event. It has no effect if the vsync rate is > 0.
*/
virtual void requestNextVsync() = 0; // Asynchronous
};
class BnDisplayEventConnection : public SafeBnInterface<IDisplayEventConnection> {
public:
BnDisplayEventConnection()
: SafeBnInterface<IDisplayEventConnection>("BnDisplayEventConnection") {}
status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply,
uint32_t flags = 0) override;
};
} // namespace android
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