| /* |
| * Copyright (C) 2007 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. |
| */ |
| |
| #define LOG_TAG "SurfaceControl" |
| |
| #include <stdint.h> |
| #include <errno.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #include <android/native_window.h> |
| |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| #include <utils/threads.h> |
| |
| #include <binder/IPCThreadState.h> |
| |
| #include <ui/DisplayInfo.h> |
| #include <ui/GraphicBuffer.h> |
| #include <ui/Rect.h> |
| |
| #include <gui/BufferQueueCore.h> |
| #include <gui/ISurfaceComposer.h> |
| #include <gui/Surface.h> |
| #include <gui/SurfaceComposerClient.h> |
| #include <gui/SurfaceControl.h> |
| |
| namespace android { |
| |
| // ============================================================================ |
| // SurfaceControl |
| // ============================================================================ |
| |
| SurfaceControl::SurfaceControl( |
| const sp<SurfaceComposerClient>& client, |
| const sp<IBinder>& handle, |
| const sp<IGraphicBufferProducer>& gbp, |
| bool owned) |
| : mClient(client), mHandle(handle), mGraphicBufferProducer(gbp), mOwned(owned) |
| { |
| } |
| |
| SurfaceControl::~SurfaceControl() |
| { |
| destroy(); |
| } |
| |
| void SurfaceControl::destroy() |
| { |
| // Avoid destroying the server-side surface if we are not the owner of it, meaning that we |
| // retrieved it from another process. |
| if (isValid() && mOwned) { |
| mClient->destroySurface(mHandle); |
| } |
| // clear all references and trigger an IPC now, to make sure things |
| // happen without delay, since these resources are quite heavy. |
| mClient.clear(); |
| mHandle.clear(); |
| mGraphicBufferProducer.clear(); |
| IPCThreadState::self()->flushCommands(); |
| } |
| |
| void SurfaceControl::clear() |
| { |
| // here, the window manager tells us explicitly that we should destroy |
| // the surface's resource. Soon after this call, it will also release |
| // its last reference (which will call the dtor); however, it is possible |
| // that a client living in the same process still holds references which |
| // would delay the call to the dtor -- that is why we need this explicit |
| // "clear()" call. |
| destroy(); |
| } |
| |
| void SurfaceControl::disconnect() { |
| if (mGraphicBufferProducer != nullptr) { |
| mGraphicBufferProducer->disconnect( |
| BufferQueueCore::CURRENTLY_CONNECTED_API); |
| } |
| } |
| |
| bool SurfaceControl::isSameSurface( |
| const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs) |
| { |
| if (lhs == nullptr || rhs == nullptr) |
| return false; |
| return lhs->mHandle == rhs->mHandle; |
| } |
| |
| status_t SurfaceControl::clearLayerFrameStats() const { |
| status_t err = validate(); |
| if (err != NO_ERROR) return err; |
| const sp<SurfaceComposerClient>& client(mClient); |
| return client->clearLayerFrameStats(mHandle); |
| } |
| |
| status_t SurfaceControl::getLayerFrameStats(FrameStats* outStats) const { |
| status_t err = validate(); |
| if (err != NO_ERROR) return err; |
| const sp<SurfaceComposerClient>& client(mClient); |
| return client->getLayerFrameStats(mHandle, outStats); |
| } |
| |
| status_t SurfaceControl::validate() const |
| { |
| if (mHandle==nullptr || mClient==nullptr) { |
| ALOGE("invalid handle (%p) or client (%p)", |
| mHandle.get(), mClient.get()); |
| return NO_INIT; |
| } |
| return NO_ERROR; |
| } |
| |
| status_t SurfaceControl::writeSurfaceToParcel( |
| const sp<SurfaceControl>& control, Parcel* parcel) |
| { |
| sp<IGraphicBufferProducer> bp; |
| if (control != nullptr) { |
| bp = control->mGraphicBufferProducer; |
| } |
| return parcel->writeStrongBinder(IInterface::asBinder(bp)); |
| } |
| |
| sp<Surface> SurfaceControl::generateSurfaceLocked() const |
| { |
| // This surface is always consumed by SurfaceFlinger, so the |
| // producerControlledByApp value doesn't matter; using false. |
| mSurfaceData = new Surface(mGraphicBufferProducer, false); |
| |
| return mSurfaceData; |
| } |
| |
| sp<Surface> SurfaceControl::getSurface() const |
| { |
| Mutex::Autolock _l(mLock); |
| if (mSurfaceData == nullptr) { |
| return generateSurfaceLocked(); |
| } |
| return mSurfaceData; |
| } |
| |
| sp<Surface> SurfaceControl::createSurface() const |
| { |
| Mutex::Autolock _l(mLock); |
| return generateSurfaceLocked(); |
| } |
| |
| sp<IBinder> SurfaceControl::getHandle() const |
| { |
| Mutex::Autolock lock(mLock); |
| return mHandle; |
| } |
| |
| sp<SurfaceComposerClient> SurfaceControl::getClient() const |
| { |
| return mClient; |
| } |
| |
| void SurfaceControl::writeToParcel(Parcel* parcel) |
| { |
| parcel->writeStrongBinder(ISurfaceComposerClient::asBinder(mClient->getClient())); |
| parcel->writeStrongBinder(mHandle); |
| parcel->writeStrongBinder(IGraphicBufferProducer::asBinder(mGraphicBufferProducer)); |
| } |
| |
| sp<SurfaceControl> SurfaceControl::readFromParcel(Parcel* parcel) |
| { |
| sp<IBinder> client = parcel->readStrongBinder(); |
| sp<IBinder> handle = parcel->readStrongBinder(); |
| if (client == nullptr || handle == nullptr) |
| { |
| ALOGE("Invalid parcel"); |
| return nullptr; |
| } |
| sp<IBinder> gbp; |
| parcel->readNullableStrongBinder(&gbp); |
| |
| // We aren't the original owner of the surface. |
| return new SurfaceControl(new SurfaceComposerClient( |
| interface_cast<ISurfaceComposerClient>(client)), |
| handle.get(), interface_cast<IGraphicBufferProducer>(gbp), false /* owned */); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| }; // namespace android |