1 /* 2 * Copyright (C) 2007 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 #define LOG_TAG "SurfaceControl" 18 19 #include <stdint.h> 20 #include <errno.h> 21 #include <sys/types.h> 22 #include <sys/stat.h> 23 24 #include <android/native_window.h> 25 26 #include <utils/Errors.h> 27 #include <utils/Log.h> 28 #include <utils/threads.h> 29 30 #include <binder/IPCThreadState.h> 31 32 #include <ui/DisplayInfo.h> 33 #include <ui/GraphicBuffer.h> 34 #include <ui/Rect.h> 35 36 #include <gui/BufferQueueCore.h> 37 #include <gui/ISurfaceComposer.h> 38 #include <gui/Surface.h> 39 #include <gui/SurfaceComposerClient.h> 40 #include <gui/SurfaceControl.h> 41 42 namespace android { 43 44 // ============================================================================ 45 // SurfaceControl 46 // ============================================================================ 47 48 SurfaceControl::SurfaceControl( 49 const sp<SurfaceComposerClient>& client, 50 const sp<IBinder>& handle, 51 const sp<IGraphicBufferProducer>& gbp, 52 bool owned) 53 : mClient(client), mHandle(handle), mGraphicBufferProducer(gbp), mOwned(owned) 54 { 55 } 56 57 SurfaceControl::~SurfaceControl() 58 { 59 destroy(); 60 } 61 62 void SurfaceControl::destroy() 63 { 64 // Avoid destroying the server-side surface if we are not the owner of it, meaning that we 65 // retrieved it from another process. 66 if (isValid() && mOwned) { 67 mClient->destroySurface(mHandle); 68 } 69 // clear all references and trigger an IPC now, to make sure things 70 // happen without delay, since these resources are quite heavy. 71 mClient.clear(); 72 mHandle.clear(); 73 mGraphicBufferProducer.clear(); 74 IPCThreadState::self()->flushCommands(); 75 } 76 77 void SurfaceControl::clear() 78 { 79 // here, the window manager tells us explicitly that we should destroy 80 // the surface's resource. Soon after this call, it will also release 81 // its last reference (which will call the dtor); however, it is possible 82 // that a client living in the same process still holds references which 83 // would delay the call to the dtor -- that is why we need this explicit 84 // "clear()" call. 85 destroy(); 86 } 87 88 void SurfaceControl::disconnect() { 89 if (mGraphicBufferProducer != NULL) { 90 mGraphicBufferProducer->disconnect( 91 BufferQueueCore::CURRENTLY_CONNECTED_API); 92 } 93 } 94 95 bool SurfaceControl::isSameSurface( 96 const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs) 97 { 98 if (lhs == 0 || rhs == 0) 99 return false; 100 return lhs->mHandle == rhs->mHandle; 101 } 102 103 status_t SurfaceControl::clearLayerFrameStats() const { 104 status_t err = validate(); 105 if (err < 0) return err; 106 const sp<SurfaceComposerClient>& client(mClient); 107 return client->clearLayerFrameStats(mHandle); 108 } 109 110 status_t SurfaceControl::getLayerFrameStats(FrameStats* outStats) const { 111 status_t err = validate(); 112 if (err < 0) return err; 113 const sp<SurfaceComposerClient>& client(mClient); 114 return client->getLayerFrameStats(mHandle, outStats); 115 } 116 117 status_t SurfaceControl::validate() const 118 { 119 if (mHandle==0 || mClient==0) { 120 ALOGE("invalid handle (%p) or client (%p)", 121 mHandle.get(), mClient.get()); 122 return NO_INIT; 123 } 124 return NO_ERROR; 125 } 126 127 status_t SurfaceControl::writeSurfaceToParcel( 128 const sp<SurfaceControl>& control, Parcel* parcel) 129 { 130 sp<IGraphicBufferProducer> bp; 131 if (control != NULL) { 132 bp = control->mGraphicBufferProducer; 133 } 134 return parcel->writeStrongBinder(IInterface::asBinder(bp)); 135 } 136 137 sp<Surface> SurfaceControl::generateSurfaceLocked() const 138 { 139 // This surface is always consumed by SurfaceFlinger, so the 140 // producerControlledByApp value doesn't matter; using false. 141 mSurfaceData = new Surface(mGraphicBufferProducer, false); 142 143 return mSurfaceData; 144 } 145 146 sp<Surface> SurfaceControl::getSurface() const 147 { 148 Mutex::Autolock _l(mLock); 149 if (mSurfaceData == 0) { 150 return generateSurfaceLocked(); 151 } 152 return mSurfaceData; 153 } 154 155 sp<Surface> SurfaceControl::createSurface() const 156 { 157 Mutex::Autolock _l(mLock); 158 return generateSurfaceLocked(); 159 } 160 161 sp<IBinder> SurfaceControl::getHandle() const 162 { 163 Mutex::Autolock lock(mLock); 164 return mHandle; 165 } 166 167 sp<SurfaceComposerClient> SurfaceControl::getClient() const 168 { 169 return mClient; 170 } 171 172 void SurfaceControl::writeToParcel(Parcel* parcel) 173 { 174 parcel->writeStrongBinder(ISurfaceComposerClient::asBinder(mClient->getClient())); 175 parcel->writeStrongBinder(mHandle); 176 parcel->writeStrongBinder(IGraphicBufferProducer::asBinder(mGraphicBufferProducer)); 177 } 178 179 sp<SurfaceControl> SurfaceControl::readFromParcel(Parcel* parcel) 180 { 181 sp<IBinder> client = parcel->readStrongBinder(); 182 sp<IBinder> handle = parcel->readStrongBinder(); 183 if (client == nullptr || handle == nullptr) 184 { 185 ALOGE("Invalid parcel"); 186 return nullptr; 187 } 188 sp<IBinder> gbp; 189 parcel->readNullableStrongBinder(&gbp); 190 191 // We aren't the original owner of the surface. 192 return new SurfaceControl(new SurfaceComposerClient( 193 interface_cast<ISurfaceComposerClient>(client)), 194 handle.get(), interface_cast<IGraphicBufferProducer>(gbp), false /* owned */); 195 } 196 197 // ---------------------------------------------------------------------------- 198 }; // namespace android 199
