75 lines
2.8 KiB
Text
75 lines
2.8 KiB
Text
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.hardware.graphics.composer@2.1;
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interface IComposerCallback {
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enum Connection : int32_t {
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INVALID = 0,
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/** The display has been connected */
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CONNECTED = 1,
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/** The display has been disconnected */
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DISCONNECTED = 2,
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};
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/**
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* Notifies the client that the given display has either been connected or
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* disconnected. Every active display (even a built-in physical display)
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* must trigger at least one hotplug notification, even if it only occurs
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* immediately after callback registration.
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*
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* Displays which have been connected are assumed to be in PowerMode::OFF,
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* and the onVsync callback should not be called for a display until vsync
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* has been enabled with setVsyncEnabled.
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*
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* The client may call back into the device while the callback is in
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* progress. The device must serialize calls to this callback such that
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* only one thread is calling it at a time.
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*
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* @param display is the display that triggers the hotplug event.
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* @param connected indicates whether the display is connected or
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* disconnected.
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*/
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@callflow(next="*")
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onHotplug(Display display, Connection connected);
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/**
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* Notifies the client to trigger a screen refresh. This forces all layer
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* state for this display to be resent, and the display to be validated
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* and presented, even if there have been no changes.
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* This refresh will occur some time after the callback is initiated, but
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* not necessarily before it returns. It is safe to trigger this callback
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* from other functions which call into the device.
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*
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* @param display is the display to refresh.
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*/
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@callflow(next="*")
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oneway onRefresh(Display display);
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/**
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* Notifies the client that a vsync event has occurred. This callback must
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* only be triggered when vsync is enabled for this display (through
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* setVsyncEnabled).
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*
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* @param display is the display which has received a vsync event
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* @param timestamp is the CLOCK_MONOTONIC time at which the vsync event
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* occurred, in nanoseconds.
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*/
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@callflow(next="*")
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oneway onVsync(Display display, int64_t timestamp);
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};
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