1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <string.h> 18 19 #include <utils/Errors.h> 20 21 #include <gui/BitTube.h> 22 #include <gui/DisplayEventReceiver.h> 23 #include <gui/IDisplayEventConnection.h> 24 #include <gui/ISurfaceComposer.h> 25 26 #include <private/gui/ComposerService.h> 27 28 // --------------------------------------------------------------------------- 29 30 namespace android { 31 32 // --------------------------------------------------------------------------- 33 34 DisplayEventReceiver::DisplayEventReceiver() { 35 sp<ISurfaceComposer> sf(ComposerService::getComposerService()); 36 if (sf != NULL) { 37 mEventConnection = sf->createDisplayEventConnection(); 38 if (mEventConnection != NULL) { 39 mDataChannel = mEventConnection->getDataChannel(); 40 } 41 } 42 } 43 44 DisplayEventReceiver::~DisplayEventReceiver() { 45 } 46 47 status_t DisplayEventReceiver::initCheck() const { 48 if (mDataChannel != NULL) 49 return NO_ERROR; 50 return NO_INIT; 51 } 52 53 int DisplayEventReceiver::getFd() const { 54 if (mDataChannel == NULL) 55 return NO_INIT; 56 57 return mDataChannel->getFd(); 58 } 59 60 status_t DisplayEventReceiver::setVsyncRate(uint32_t count) { 61 if (int32_t(count) < 0) 62 return BAD_VALUE; 63 64 if (mEventConnection != NULL) { 65 mEventConnection->setVsyncRate(count); 66 return NO_ERROR; 67 } 68 return NO_INIT; 69 } 70 71 status_t DisplayEventReceiver::requestNextVsync() { 72 if (mEventConnection != NULL) { 73 mEventConnection->requestNextVsync(); 74 return NO_ERROR; 75 } 76 return NO_INIT; 77 } 78 79 80 ssize_t DisplayEventReceiver::getEvents(DisplayEventReceiver::Event* events, 81 size_t count) { 82 return DisplayEventReceiver::getEvents(mDataChannel, events, count); 83 } 84 85 ssize_t DisplayEventReceiver::getEvents(const sp<BitTube>& dataChannel, 86 Event* events, size_t count) 87 { 88 return BitTube::recvObjects(dataChannel, events, count); 89 } 90 91 ssize_t DisplayEventReceiver::sendEvents(const sp<BitTube>& dataChannel, 92 Event const* events, size_t count) 93 { 94 return BitTube::sendObjects(dataChannel, events, count); 95 } 96 97 // --------------------------------------------------------------------------- 98 99 }; // namespace android 100
