You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

76 lines
2.8 KiB

/*
* Copyright (C) 2016 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.hardware.graphics.composer@2.1;
interface IComposerCallback {
enum Connection : int32_t {
INVALID = 0,
/** The display has been connected */
CONNECTED = 1,
/** The display has been disconnected */
DISCONNECTED = 2,
};
/**
* Notifies the client that the given display has either been connected or
* disconnected. Every active display (even a built-in physical display)
* must trigger at least one hotplug notification, even if it only occurs
* immediately after callback registration.
*
* Displays which have been connected are assumed to be in PowerMode::OFF,
* and the onVsync callback should not be called for a display until vsync
* has been enabled with setVsyncEnabled.
*
* The client may call back into the device while the callback is in
* progress. The device must serialize calls to this callback such that
* only one thread is calling it at a time.
*
* @param display is the display that triggers the hotplug event.
* @param connected indicates whether the display is connected or
* disconnected.
*/
@callflow(next="*")
onHotplug(Display display, Connection connected);
/**
* Notifies the client to trigger a screen refresh. This forces all layer
* state for this display to be resent, and the display to be validated
* and presented, even if there have been no changes.
* This refresh will occur some time after the callback is initiated, but
* not necessarily before it returns. It is safe to trigger this callback
* from other functions which call into the device.
*
* @param display is the display to refresh.
*/
@callflow(next="*")
oneway onRefresh(Display display);
/**
* Notifies the client that a vsync event has occurred. This callback must
* only be triggered when vsync is enabled for this display (through
* setVsyncEnabled).
*
* @param display is the display which has received a vsync event
* @param timestamp is the CLOCK_MONOTONIC time at which the vsync event
* occurred, in nanoseconds.
*/
@callflow(next="*")
oneway onVsync(Display display, int64_t timestamp);
};