478ae5eb5a
- add the ability to set the vsync delivery rate, when the rate is set to N>1 (ie: receive every N vsync), SF process' is woken up for all of vsync, but clients only see the every N events. - add the concept of one-shot vsync events, with a call-back to request the next one. currently the call-back is a binder IPC. Change-Id: I09f71df0b0ba0d88ed997645e2e2497d553c9a1b
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/*
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* Copyright (C) 2011 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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#include <stdint.h>
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#include <sys/types.h>
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#include <gui/IDisplayEventConnection.h>
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#include <gui/BitTube.h>
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#include <gui/DisplayEventReceiver.h>
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#include <utils/Errors.h>
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#include "SurfaceFlinger.h"
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#include "DisplayEventConnection.h"
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#include "EventThread.h"
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// ---------------------------------------------------------------------------
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namespace android {
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// ---------------------------------------------------------------------------
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DisplayEventConnection::DisplayEventConnection(
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const sp<EventThread>& eventThread)
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: mEventThread(eventThread), mChannel(new BitTube())
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{
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}
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DisplayEventConnection::~DisplayEventConnection() {
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mEventThread->unregisterDisplayEventConnection(this);
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}
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void DisplayEventConnection::onFirstRef() {
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// NOTE: mEventThread doesn't hold a strong reference on us
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mEventThread->registerDisplayEventConnection(this);
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}
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sp<BitTube> DisplayEventConnection::getDataChannel() const {
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return mChannel;
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}
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void DisplayEventConnection::setVsyncRate(uint32_t count) {
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mEventThread->setVsyncRate(count, this);
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}
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void DisplayEventConnection::requestNextVsync() {
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mEventThread->requestNextVsync(this);
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}
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status_t DisplayEventConnection::postEvent(const DisplayEventReceiver::Event& event)
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{
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ssize_t size = mChannel->write(&event, sizeof(DisplayEventReceiver::Event));
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return size < 0 ? status_t(size) : status_t(NO_ERROR);
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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