The Tor Browser: gfx/layers/ipc/CompositorParent.cpp@97036ab72558 (annotated)

gfx/layers/ipc/CompositorParent.cpp@97036ab72558 (annotated)

gfx/layers/ipc/CompositorParent.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set sw=2 ts=2 et tw=80 : */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "CompositorParent.h"
 #include <stdio.h>                      // for fprintf, stdout
 #include <stdint.h>                     // for uint64_t
 #include <map>                          // for _Rb_tree_iterator, etc
 #include <utility>                      // for pair
 #include "LayerTransactionParent.h"     // for LayerTransactionParent
 #include "RenderTrace.h"                // for RenderTraceLayers
 #include "base/message_loop.h"          // for MessageLoop
 #include "base/process.h"               // for ProcessHandle
 #include "base/process_util.h"          // for OpenProcessHandle
 #include "base/task.h"                  // for CancelableTask, etc
 #include "base/thread.h"                // for Thread
 #include "base/tracked.h"               // for FROM_HERE
 #include "gfxContext.h"                 // for gfxContext
 #include "gfxPlatform.h"                // for gfxPlatform
 #include "gfxPrefs.h"                   // for gfxPrefs
 #include "ipc/ShadowLayersManager.h"    // for ShadowLayersManager
 #include "mozilla/AutoRestore.h"        // for AutoRestore
 #include "mozilla/DebugOnly.h"          // for DebugOnly
 #include "mozilla/gfx/2D.h"          // for DrawTarget
 #include "mozilla/gfx/Point.h"          // for IntSize
 #include "mozilla/ipc/Transport.h"      // for Transport
 #include "mozilla/layers/APZCTreeManager.h"  // for APZCTreeManager
 #include "mozilla/layers/AsyncCompositionManager.h"
 #include "mozilla/layers/BasicCompositor.h"  // for BasicCompositor
 #include "mozilla/layers/Compositor.h"  // for Compositor
 #include "mozilla/layers/CompositorOGL.h"  // for CompositorOGL
 #include "mozilla/layers/CompositorTypes.h"
 #include "mozilla/layers/LayerManagerComposite.h"
 #include "mozilla/layers/LayersTypes.h"
 #include "mozilla/layers/PLayerTransactionParent.h"
 #include "mozilla/mozalloc.h"           // for operator new, etc
 #include "nsCOMPtr.h"                   // for already_AddRefed
 #include "nsDebug.h"                    // for NS_ABORT_IF_FALSE, etc
 #include "nsISupportsImpl.h"            // for MOZ_COUNT_CTOR, etc
 #include "nsIWidget.h"                  // for nsIWidget
 #include "nsRect.h"                     // for nsIntRect
 #include "nsTArray.h"                   // for nsTArray
 #include "nsThreadUtils.h"              // for NS_IsMainThread
 #include "nsXULAppAPI.h"                // for XRE_GetIOMessageLoop
 #ifdef XP_WIN
 #include "mozilla/layers/CompositorD3D11.h"
 #include "mozilla/layers/CompositorD3D9.h"
 #endif
 #include "GeckoProfiler.h"
 #include "mozilla/ipc/ProtocolTypes.h"
 #include "mozilla/unused.h"
 using namespace base;
 using namespace mozilla;
 using namespace mozilla::ipc;
 using namespace mozilla::gfx;
 using namespace std;
 namespace mozilla {
 namespace layers {
 CompositorParent::LayerTreeState::LayerTreeState()
   : mParent(nullptr)
   , mLayerManager(nullptr)
   , mCrossProcessParent(nullptr)
 {
 }
 typedef map<uint64_t, CompositorParent::LayerTreeState> LayerTreeMap;
 static LayerTreeMap sIndirectLayerTrees;
 // FIXME/bug 774386: we're assuming that there's only one
 // CompositorParent, but that's not always true.  This assumption only
 // affects CrossProcessCompositorParent below.
 static Thread* sCompositorThread = nullptr;
 // manual reference count of the compositor thread.
 static int sCompositorThreadRefCount = 0;
 static MessageLoop* sMainLoop = nullptr;
 // When ContentParent::StartUp() is called, we use the Thread global.
 // When StartUpWithExistingThread() is used, we have to use the two
 // duplicated globals, because there's no API to make a Thread from an
 // existing thread.
 static PlatformThreadId sCompositorThreadID = 0;
 static MessageLoop* sCompositorLoop = nullptr;
 // See ImageBridgeChild.cpp
 void ReleaseImageBridgeParentSingleton();
 static void DeferredDeleteCompositorParent(CompositorParent* aNowReadyToDie)
 {
   aNowReadyToDie->Release();
 }
 static void DeleteCompositorThread()
 {
   if (NS_IsMainThread()){
     ReleaseImageBridgeParentSingleton();
     delete sCompositorThread;
     sCompositorThread = nullptr;
     sCompositorLoop = nullptr;
     sCompositorThreadID = 0;
   } else {
     sMainLoop->PostTask(FROM_HERE, NewRunnableFunction(&DeleteCompositorThread));
   }
 }
 static void ReleaseCompositorThread()
 {
   if(--sCompositorThreadRefCount == 0) {
     DeleteCompositorThread();
   }
 }
 void
 CompositorParent::StartUpWithExistingThread(MessageLoop* aMsgLoop,
                                             PlatformThreadId aThreadID)
 {
   MOZ_ASSERT(!sCompositorThread);
   CreateCompositorMap();
   sCompositorLoop = aMsgLoop;
   sCompositorThreadID = aThreadID;
   sMainLoop = MessageLoop::current();
   sCompositorThreadRefCount = 1;
 }
 void CompositorParent::StartUp()
 {
   // Check if compositor started already with StartUpWithExistingThread
   if (sCompositorThreadID) {
     return;
   }
   MOZ_ASSERT(!sCompositorLoop);
   CreateCompositorMap();
   CreateThread();
   sMainLoop = MessageLoop::current();
 }
 void CompositorParent::ShutDown()
 {
   DestroyThread();
   DestroyCompositorMap();
 }
 bool CompositorParent::CreateThread()
 {
   NS_ASSERTION(NS_IsMainThread(), "Should be on the main Thread!");
   if (sCompositorThread || sCompositorLoop) {
     return true;
   }
   sCompositorThreadRefCount = 1;
   sCompositorThread = new Thread("Compositor");
   Thread::Options options;
   /* Timeout values are powers-of-two to enable us get better data.
 ms is chosen for transient hangs because 8Hz should be the minimally
      acceptable goal for Compositor responsiveness (normal goal is 60Hz). */
   options.transient_hang_timeout = 128; // milliseconds
   /* 8192ms is chosen for permanent hangs because it's several seconds longer
      than the default hang timeout on major platforms (about 5 seconds). */
   options.permanent_hang_timeout = 8192; // milliseconds
   if (!sCompositorThread->StartWithOptions(options)) {
     delete sCompositorThread;
     sCompositorThread = nullptr;
     return false;
   }
   return true;
 }
 void CompositorParent::DestroyThread()
 {
   NS_ASSERTION(NS_IsMainThread(), "Should be on the main Thread!");
   ReleaseCompositorThread();
 }
 MessageLoop* CompositorParent::CompositorLoop()
 {
   return sCompositorThread ? sCompositorThread->message_loop() : sCompositorLoop;
 }
 CompositorParent::CompositorParent(nsIWidget* aWidget,
                                    bool aUseExternalSurfaceSize,
                                    int aSurfaceWidth, int aSurfaceHeight)
   : mWidget(aWidget)
   , mCurrentCompositeTask(nullptr)
   , mIsTesting(false)
   , mPaused(false)
   , mUseExternalSurfaceSize(aUseExternalSurfaceSize)
   , mEGLSurfaceSize(aSurfaceWidth, aSurfaceHeight)
   , mPauseCompositionMonitor("PauseCompositionMonitor")
   , mResumeCompositionMonitor("ResumeCompositionMonitor")
   , mOverrideComposeReadiness(false)
   , mForceCompositionTask(nullptr)
   , mWantDidCompositeEvent(false)
 {
   NS_ABORT_IF_FALSE(sCompositorThread != nullptr || sCompositorThreadID,
                     "The compositor thread must be Initialized before instanciating a COmpositorParent.");
   MOZ_COUNT_CTOR(CompositorParent);
   mCompositorID = 0;
   // FIXME: This holds on the the fact that right now the only thing that
   // can destroy this instance is initialized on the compositor thread after
   // this task has been processed.
   CompositorLoop()->PostTask(FROM_HERE, NewRunnableFunction(&AddCompositor,
                                                           this, &mCompositorID));
   mRootLayerTreeID = AllocateLayerTreeId();
   sIndirectLayerTrees[mRootLayerTreeID].mParent = this;
   mApzcTreeManager = new APZCTreeManager();
   ++sCompositorThreadRefCount;
 }
 PlatformThreadId
 CompositorParent::CompositorThreadID()
 {
   return sCompositorThread ? sCompositorThread->thread_id() : sCompositorThreadID;
 }
 bool
 CompositorParent::IsInCompositorThread()
 {
   return CompositorThreadID() == PlatformThread::CurrentId();
 }
 uint64_t
 CompositorParent::RootLayerTreeId()
 {
   return mRootLayerTreeID;
 }
 CompositorParent::~CompositorParent()
 {
   MOZ_COUNT_DTOR(CompositorParent);
   ReleaseCompositorThread();
 }
 void
 CompositorParent::Destroy()
 {
   NS_ABORT_IF_FALSE(ManagedPLayerTransactionParent().Length() == 0,
                     "CompositorParent destroyed before managed PLayerTransactionParent");
   // Ensure that the layer manager is destructed on the compositor thread.
   mLayerManager = nullptr;
   mCompositor = nullptr;
   mCompositionManager = nullptr;
   mApzcTreeManager->ClearTree();
   mApzcTreeManager = nullptr;
   sIndirectLayerTrees.erase(mRootLayerTreeID);
 }
 void
 CompositorParent::ForceIsFirstPaint()
 {
   mCompositionManager->ForceIsFirstPaint();
 }
 bool
 CompositorParent::RecvWillStop()
 {
   mPaused = true;
   RemoveCompositor(mCompositorID);
   // Ensure that the layer manager is destroyed before CompositorChild.
   if (mLayerManager) {
     for (LayerTreeMap::iterator it = sIndirectLayerTrees.begin();
          it != sIndirectLayerTrees.end(); it++)
     {
       LayerTreeState* lts = &it->second;
       if (lts->mParent == this) {
         mLayerManager->ClearCachedResources(lts->mRoot);
         lts->mLayerManager = nullptr;
       }
     }
     mLayerManager->Destroy();
     mLayerManager = nullptr;
     mCompositor = nullptr;
     mCompositionManager = nullptr;
   }
   return true;
 }
 bool
 CompositorParent::RecvStop()
 {
   Destroy();
   // There are chances that the ref count reaches zero on the main thread shortly
   // after this function returns while some ipdl code still needs to run on
   // this thread.
   // We must keep the compositor parent alive untill the code handling message
   // reception is finished on this thread.
   this->AddRef(); // Corresponds to DeferredDeleteCompositorParent's Release
   CompositorLoop()->PostTask(FROM_HERE,
                            NewRunnableFunction(&DeferredDeleteCompositorParent,
                                                this));
   return true;
 }
 bool
 CompositorParent::RecvPause()
 {
   PauseComposition();
   return true;
 }
 bool
 CompositorParent::RecvResume()
 {
   ResumeComposition();
   return true;
 }
 bool
 CompositorParent::RecvMakeSnapshot(const SurfaceDescriptor& aInSnapshot,
                                    SurfaceDescriptor* aOutSnapshot)
 {
   RefPtr<DrawTarget> target = GetDrawTargetForDescriptor(aInSnapshot, gfx::BackendType::CAIRO);
   ForceComposeToTarget(target);
   *aOutSnapshot = aInSnapshot;
   return true;
 }
 bool
 CompositorParent::RecvFlushRendering()
 {
   // If we're waiting to do a composite, then cancel it
   // and do it immediately instead.
   if (mCurrentCompositeTask) {
     CancelCurrentCompositeTask();
     ForceComposeToTarget(nullptr);
   }
   return true;
 }
 bool
 CompositorParent::RecvNotifyRegionInvalidated(const nsIntRegion& aRegion)
 {
   if (mLayerManager) {
     mLayerManager->AddInvalidRegion(aRegion);
   }
   return true;
 }
 bool
 CompositorParent::RecvStartFrameTimeRecording(const int32_t& aBufferSize, uint32_t* aOutStartIndex)
 {
   if (mLayerManager) {
     *aOutStartIndex = mLayerManager->StartFrameTimeRecording(aBufferSize);
   } else {
     *aOutStartIndex = 0;
   }
   return true;
 }
 bool
 CompositorParent::RecvStopFrameTimeRecording(const uint32_t& aStartIndex,
                                              InfallibleTArray<float>* intervals)
 {
   if (mLayerManager) {
     mLayerManager->StopFrameTimeRecording(aStartIndex, *intervals);
   }
   return true;
 }
 void
 CompositorParent::ActorDestroy(ActorDestroyReason why)
 {
   CancelCurrentCompositeTask();
   if (mForceCompositionTask) {
     mForceCompositionTask->Cancel();
     mForceCompositionTask = nullptr;
   }
   mPaused = true;
   RemoveCompositor(mCompositorID);
   if (mLayerManager) {
     mLayerManager->Destroy();
     mLayerManager = nullptr;
     sIndirectLayerTrees[mRootLayerTreeID].mLayerManager = nullptr;
     mCompositionManager = nullptr;
     mCompositor = nullptr;
   }
 }
 void
 CompositorParent::ScheduleRenderOnCompositorThread()
 {
   CancelableTask *renderTask = NewRunnableMethod(this, &CompositorParent::ScheduleComposition);
   CompositorLoop()->PostTask(FROM_HERE, renderTask);
 }
 void
 CompositorParent::PauseComposition()
 {
   NS_ABORT_IF_FALSE(CompositorThreadID() == PlatformThread::CurrentId(),
                     "PauseComposition() can only be called on the compositor thread");
   MonitorAutoLock lock(mPauseCompositionMonitor);
   if (!mPaused) {
     mPaused = true;
     mCompositor->Pause();
   }
   // if anyone's waiting to make sure that composition really got paused, tell them
   lock.NotifyAll();
 }
 void
 CompositorParent::ResumeComposition()
 {
   NS_ABORT_IF_FALSE(CompositorThreadID() == PlatformThread::CurrentId(),
                     "ResumeComposition() can only be called on the compositor thread");
   MonitorAutoLock lock(mResumeCompositionMonitor);
   if (!mCompositor->Resume()) {
 #ifdef MOZ_WIDGET_ANDROID
     // We can't get a surface. This could be because the activity changed between
     // the time resume was scheduled and now.
     __android_log_print(ANDROID_LOG_INFO, "CompositorParent", "Unable to renew compositor surface; remaining in paused state");
 #endif
     lock.NotifyAll();
     return;
   }
   mPaused = false;
   Composite();
   // if anyone's waiting to make sure that composition really got resumed, tell them
   lock.NotifyAll();
 }
 void
 CompositorParent::ForceComposition()
 {
   // Cancel the orientation changed state to force composition
   mForceCompositionTask = nullptr;
   ScheduleRenderOnCompositorThread();
 }
 void
 CompositorParent::CancelCurrentCompositeTask()
 {
   if (mCurrentCompositeTask) {
     mCurrentCompositeTask->Cancel();
     mCurrentCompositeTask = nullptr;
   }
 }
 void
 CompositorParent::SetEGLSurfaceSize(int width, int height)
 {
   NS_ASSERTION(mUseExternalSurfaceSize, "Compositor created without UseExternalSurfaceSize provided");
   mEGLSurfaceSize.SizeTo(width, height);
   if (mCompositor) {
     mCompositor->SetDestinationSurfaceSize(gfx::IntSize(mEGLSurfaceSize.width, mEGLSurfaceSize.height));
   }
 }
 void
 CompositorParent::ResumeCompositionAndResize(int width, int height)
 {
   SetEGLSurfaceSize(width, height);
   ResumeComposition();
 }
 /*
  * This will execute a pause synchronously, waiting to make sure that the compositor
  * really is paused.
  */
 void
 CompositorParent::SchedulePauseOnCompositorThread()
 {
   MonitorAutoLock lock(mPauseCompositionMonitor);
   CancelableTask *pauseTask = NewRunnableMethod(this,
                                                 &CompositorParent::PauseComposition);
   CompositorLoop()->PostTask(FROM_HERE, pauseTask);
   // Wait until the pause has actually been processed by the compositor thread
   lock.Wait();
 }
 bool
 CompositorParent::ScheduleResumeOnCompositorThread(int width, int height)
 {
   MonitorAutoLock lock(mResumeCompositionMonitor);
   CancelableTask *resumeTask =
     NewRunnableMethod(this, &CompositorParent::ResumeCompositionAndResize, width, height);
   CompositorLoop()->PostTask(FROM_HERE, resumeTask);
   // Wait until the resume has actually been processed by the compositor thread
   lock.Wait();
   return !mPaused;
 }
 void
 CompositorParent::ScheduleTask(CancelableTask* task, int time)
 {
   if (time == 0) {
     MessageLoop::current()->PostTask(FROM_HERE, task);
   } else {
     MessageLoop::current()->PostDelayedTask(FROM_HERE, task, time);
   }
 }
 void
 CompositorParent::NotifyShadowTreeTransaction(uint64_t aId, bool aIsFirstPaint, bool aScheduleComposite)
 {
   if (mApzcTreeManager &&
       mLayerManager &&
       mLayerManager->GetRoot()) {
     AutoResolveRefLayers resolve(mCompositionManager);
     mApzcTreeManager->UpdatePanZoomControllerTree(this, mLayerManager->GetRoot(), aIsFirstPaint, aId);
     mLayerManager->NotifyShadowTreeTransaction();
   }
   if (aScheduleComposite) {
     ScheduleComposition();
   }
   mWantDidCompositeEvent = true;
 }
 // Used when layout.frame_rate is -1. Needs to be kept in sync with
 // DEFAULT_FRAME_RATE in nsRefreshDriver.cpp.
 static const int32_t kDefaultFrameRate = 60;
 static int32_t
 CalculateCompositionFrameRate()
 {
   int32_t compositionFrameRatePref = gfxPrefs::LayersCompositionFrameRate();
   if (compositionFrameRatePref < 0) {
     // Use the same frame rate for composition as for layout.
     int32_t layoutFrameRatePref = gfxPrefs::LayoutFrameRate();
     if (layoutFrameRatePref < 0) {
       // TODO: The main thread frame scheduling code consults the actual
       // monitor refresh rate in this case. We should do the same.
       return kDefaultFrameRate;
     }
     return layoutFrameRatePref;
   }
   return compositionFrameRatePref;
 }
 void
 CompositorParent::ScheduleComposition()
 {
   if (mCurrentCompositeTask || mPaused) {
     return;
   }
   bool initialComposition = mLastCompose.IsNull();
   TimeDuration delta;
   if (!initialComposition)
     delta = TimeStamp::Now() - mLastCompose;
   int32_t rate = CalculateCompositionFrameRate();
   // If rate == 0 (ASAP mode), minFrameDelta must be 0 so there's no delay.
   TimeDuration minFrameDelta = TimeDuration::FromMilliseconds(
     rate == 0 ? 0.0 : std::max(0.0, 1000.0 / rate));
   mCurrentCompositeTask = NewRunnableMethod(this, &CompositorParent::Composite);
   if (!initialComposition && delta < minFrameDelta) {
     TimeDuration delay = minFrameDelta - delta;
 #ifdef COMPOSITOR_PERFORMANCE_WARNING
     mExpectedComposeStartTime = TimeStamp::Now() + delay;
 #endif
     ScheduleTask(mCurrentCompositeTask, delay.ToMilliseconds());
   } else {
 #ifdef COMPOSITOR_PERFORMANCE_WARNING
     mExpectedComposeStartTime = TimeStamp::Now();
 #endif
     ScheduleTask(mCurrentCompositeTask, 0);
   }
 }
 void
 CompositorParent::Composite()
 {
   CompositeToTarget(nullptr);
 }
 void
 CompositorParent::CompositeToTarget(DrawTarget* aTarget)
 {
   profiler_tracing("Paint", "Composite", TRACING_INTERVAL_START);
   PROFILER_LABEL("CompositorParent", "Composite");
   NS_ABORT_IF_FALSE(CompositorThreadID() == PlatformThread::CurrentId(),
                     "Composite can only be called on the compositor thread");
 #ifdef COMPOSITOR_PERFORMANCE_WARNING
   TimeDuration scheduleDelta = TimeStamp::Now() - mExpectedComposeStartTime;
   if (scheduleDelta > TimeDuration::FromMilliseconds(2) ||
       scheduleDelta < TimeDuration::FromMilliseconds(-2)) {
     printf_stderr("Compositor: Compose starting off schedule by %4.1f ms\n",
                   scheduleDelta.ToMilliseconds());
   }
 #endif
   if (mCurrentCompositeTask) {
     mCurrentCompositeTask->Cancel();
     mCurrentCompositeTask = nullptr;
   }
   mLastCompose = TimeStamp::Now();
   if (!CanComposite()) {
     return;
   }
   AutoResolveRefLayers resolve(mCompositionManager);
   if (aTarget) {
     mLayerManager->BeginTransactionWithDrawTarget(aTarget);
   } else {
     mLayerManager->BeginTransaction();
   }
   if (mForceCompositionTask && !mOverrideComposeReadiness) {
     if (mCompositionManager->ReadyForCompose()) {
       mForceCompositionTask->Cancel();
       mForceCompositionTask = nullptr;
     } else {
       return;
     }
   }
   TimeStamp time = mIsTesting ? mTestTime : mLastCompose;
   bool requestNextFrame = mCompositionManager->TransformShadowTree(time);
   if (requestNextFrame) {
     ScheduleComposition();
   }
   RenderTraceLayers(mLayerManager->GetRoot(), "0000");
   mCompositionManager->ComputeRotation();
 #ifdef MOZ_DUMP_PAINTING
   static bool gDumpCompositorTree = false;
   if (gDumpCompositorTree) {
     printf_stderr("Painting --- compositing layer tree:\n");
     mLayerManager->Dump();
   }
 #endif
   mLayerManager->SetDebugOverlayWantsNextFrame(false);
   mLayerManager->EndEmptyTransaction();
   if (!aTarget && mWantDidCompositeEvent) {
     DidComposite();
     mWantDidCompositeEvent = false;
   }
   if (mLayerManager->DebugOverlayWantsNextFrame()) {
     ScheduleComposition();
   }
 #ifdef COMPOSITOR_PERFORMANCE_WARNING
   TimeDuration executionTime = TimeStamp::Now() - mLastCompose;
   TimeDuration frameBudget = TimeDuration::FromMilliseconds(15);
   int32_t frameRate = CalculateCompositionFrameRate();
   if (frameRate > 0) {
     frameBudget = TimeDuration::FromSeconds(1.0 / frameRate);
   }
   if (executionTime > frameBudget) {
     printf_stderr("Compositor: Composite execution took %4.1f ms\n",
                   executionTime.ToMilliseconds());
   }
 #endif
   // 0 -> Full-tilt composite
   if (gfxPrefs::LayersCompositionFrameRate() == 0
     || mLayerManager->GetCompositor()->GetDiagnosticTypes() & DIAGNOSTIC_FLASH_BORDERS) {
     // Special full-tilt composite mode for performance testing
     ScheduleComposition();
   }
   profiler_tracing("Paint", "Composite", TRACING_INTERVAL_END);
 }
 void
 CompositorParent::DidComposite()
 {
   unused << SendDidComposite(0);
   for (LayerTreeMap::iterator it = sIndirectLayerTrees.begin();
        it != sIndirectLayerTrees.end(); it++) {
     LayerTreeState* lts = &it->second;
     if (lts->mParent == this && lts->mCrossProcessParent) {
       unused << lts->mCrossProcessParent->SendDidComposite(it->first);
     }
   }
 }
 void
 CompositorParent::ForceComposeToTarget(DrawTarget* aTarget)
 {
   PROFILER_LABEL("CompositorParent", "ForceComposeToTarget");
   AutoRestore<bool> override(mOverrideComposeReadiness);
   mOverrideComposeReadiness = true;
   CompositeToTarget(aTarget);
 }
 bool
 CompositorParent::CanComposite()
 {
   return !(mPaused || !mLayerManager || !mLayerManager->GetRoot());
 }
 // Go down the composite layer tree, setting properties to match their
 // content-side counterparts.
 static void
 SetShadowProperties(Layer* aLayer)
 {
   // FIXME: Bug 717688 -- Do these updates in LayerTransactionParent::RecvUpdate.
   LayerComposite* layerComposite = aLayer->AsLayerComposite();
   // Set the layerComposite's base transform to the layer's base transform.
   layerComposite->SetShadowTransform(aLayer->GetBaseTransform());
   layerComposite->SetShadowTransformSetByAnimation(false);
   layerComposite->SetShadowVisibleRegion(aLayer->GetVisibleRegion());
   layerComposite->SetShadowClipRect(aLayer->GetClipRect());
   layerComposite->SetShadowOpacity(aLayer->GetOpacity());
   for (Layer* child = aLayer->GetFirstChild();
       child; child = child->GetNextSibling()) {
     SetShadowProperties(child);
   }
 }
 void
 CompositorParent::ShadowLayersUpdated(LayerTransactionParent* aLayerTree,
                                       const TargetConfig& aTargetConfig,
                                       bool aIsFirstPaint,
                                       bool aScheduleComposite)
 {
   if (!aIsFirstPaint &&
       !mCompositionManager->IsFirstPaint() &&
       mCompositionManager->RequiresReorientation(aTargetConfig.orientation())) {
     if (mForceCompositionTask != nullptr) {
       mForceCompositionTask->Cancel();
     }
     mForceCompositionTask = NewRunnableMethod(this, &CompositorParent::ForceComposition);
     ScheduleTask(mForceCompositionTask, gfxPrefs::OrientationSyncMillis());
   }
   // Instruct the LayerManager to update its render bounds now. Since all the orientation
   // change, dimension change would be done at the stage, update the size here is free of
   // race condition.
   mLayerManager->UpdateRenderBounds(aTargetConfig.clientBounds());
   mLayerManager->SetRegionToClear(aTargetConfig.clearRegion());
   mCompositionManager->Updated(aIsFirstPaint, aTargetConfig);
   Layer* root = aLayerTree->GetRoot();
   mLayerManager->SetRoot(root);
   if (mApzcTreeManager) {
     AutoResolveRefLayers resolve(mCompositionManager);
     mApzcTreeManager->UpdatePanZoomControllerTree(this, root, aIsFirstPaint, mRootLayerTreeID);
   }
   if (root) {
     SetShadowProperties(root);
   }
   if (aScheduleComposite) {
     ScheduleComposition();
     // When testing we synchronously update the shadow tree with the animated
     // values to avoid race conditions when calling GetAnimationTransform etc.
     // (since the above SetShadowProperties will remove animation effects).
     // However, we only do this update when a composite operation is already
     // scheduled in order to better match the behavior under regular sampling
     // conditions.
     if (mIsTesting && root && mCurrentCompositeTask) {
       AutoResolveRefLayers resolve(mCompositionManager);
       bool requestNextFrame =
         mCompositionManager->TransformShadowTree(mTestTime);
       if (!requestNextFrame) {
         CancelCurrentCompositeTask();
       }
     }
   }
   mLayerManager->NotifyShadowTreeTransaction();
   mWantDidCompositeEvent = true;
 }
 void
 CompositorParent::ForceComposite(LayerTransactionParent* aLayerTree)
 {
   ScheduleComposition();
 }
 bool
 CompositorParent::SetTestSampleTime(LayerTransactionParent* aLayerTree,
                                     const TimeStamp& aTime)
 {
   if (aTime.IsNull()) {
     return false;
   }
   mIsTesting = true;
   mTestTime = aTime;
   // Update but only if we were already scheduled to animate
   if (mCompositionManager && mCurrentCompositeTask) {
     AutoResolveRefLayers resolve(mCompositionManager);
     bool requestNextFrame = mCompositionManager->TransformShadowTree(aTime);
     if (!requestNextFrame) {
       CancelCurrentCompositeTask();
     }
   }
   return true;
 }
 void
 CompositorParent::LeaveTestMode(LayerTransactionParent* aLayerTree)
 {
   mIsTesting = false;
 }
 void
 CompositorParent::InitializeLayerManager(const nsTArray<LayersBackend>& aBackendHints)
 {
   NS_ASSERTION(!mLayerManager, "Already initialised mLayerManager");
   NS_ASSERTION(!mCompositor,   "Already initialised mCompositor");
   for (size_t i = 0; i < aBackendHints.Length(); ++i) {
     RefPtr<Compositor> compositor;
     if (aBackendHints[i] == LayersBackend::LAYERS_OPENGL) {
       compositor = new CompositorOGL(mWidget,
                                      mEGLSurfaceSize.width,
                                      mEGLSurfaceSize.height,
                                      mUseExternalSurfaceSize);
     } else if (aBackendHints[i] == LayersBackend::LAYERS_BASIC) {
       compositor = new BasicCompositor(mWidget);
 #ifdef XP_WIN
     } else if (aBackendHints[i] == LayersBackend::LAYERS_D3D11) {
       compositor = new CompositorD3D11(mWidget);
     } else if (aBackendHints[i] == LayersBackend::LAYERS_D3D9) {
       compositor = new CompositorD3D9(this, mWidget);
 #endif
     }
     if (!compositor) {
       // We passed a backend hint for which we can't create a compositor.
       // For example, we sometime pass LayersBackend::LAYERS_NONE as filler in aBackendHints.
       continue;
     }
     compositor->SetCompositorID(mCompositorID);
     RefPtr<LayerManagerComposite> layerManager = new LayerManagerComposite(compositor);
     if (layerManager->Initialize()) {
       mLayerManager = layerManager;
       MOZ_ASSERT(compositor);
       mCompositor = compositor;
       sIndirectLayerTrees[mRootLayerTreeID].mLayerManager = layerManager;
       return;
     }
   }
 }
 PLayerTransactionParent*
 CompositorParent::AllocPLayerTransactionParent(const nsTArray<LayersBackend>& aBackendHints,
                                                const uint64_t& aId,
                                                TextureFactoryIdentifier* aTextureFactoryIdentifier,
                                                bool *aSuccess)
 {
   MOZ_ASSERT(aId == 0);
   // mWidget doesn't belong to the compositor thread, so it should be set to
   // nullptr before returning from this method, to avoid accessing it elsewhere.
   nsIntRect rect;
   mWidget->GetClientBounds(rect);
   InitializeLayerManager(aBackendHints);
   mWidget = nullptr;
   if (!mLayerManager) {
     NS_WARNING("Failed to initialise Compositor");
     *aSuccess = false;
     LayerTransactionParent* p = new LayerTransactionParent(nullptr, this, 0);
     p->AddIPDLReference();
     return p;
   }
   mCompositionManager = new AsyncCompositionManager(mLayerManager);
   *aSuccess = true;
   *aTextureFactoryIdentifier = mCompositor->GetTextureFactoryIdentifier();
   LayerTransactionParent* p = new LayerTransactionParent(mLayerManager, this, 0);
   p->AddIPDLReference();
   return p;
 }
 bool
 CompositorParent::DeallocPLayerTransactionParent(PLayerTransactionParent* actor)
 {
   static_cast<LayerTransactionParent*>(actor)->ReleaseIPDLReference();
   return true;
 }
 typedef map<uint64_t,CompositorParent*> CompositorMap;
 static CompositorMap* sCompositorMap;
 void CompositorParent::CreateCompositorMap()
 {
   if (sCompositorMap == nullptr) {
     sCompositorMap = new CompositorMap;
   }
 }
 void CompositorParent::DestroyCompositorMap()
 {
   if (sCompositorMap != nullptr) {
     NS_ASSERTION(sCompositorMap->empty(),
                  "The Compositor map should be empty when destroyed>");
     delete sCompositorMap;
     sCompositorMap = nullptr;
   }
 }
 CompositorParent* CompositorParent::GetCompositor(uint64_t id)
 {
   CompositorMap::iterator it = sCompositorMap->find(id);
   return it != sCompositorMap->end() ? it->second : nullptr;
 }
 void CompositorParent::AddCompositor(CompositorParent* compositor, uint64_t* outID)
 {
   static uint64_t sNextID = 1;
   ++sNextID;
   (*sCompositorMap)[sNextID] = compositor;
   *outID = sNextID;
 }
 CompositorParent* CompositorParent::RemoveCompositor(uint64_t id)
 {
   CompositorMap::iterator it = sCompositorMap->find(id);
   if (it == sCompositorMap->end()) {
     return nullptr;
   }
   CompositorParent *retval = it->second;
   sCompositorMap->erase(it);
   return retval;
 }
 bool
 CompositorParent::RecvNotifyChildCreated(const uint64_t& child)
 {
   NotifyChildCreated(child);
   return true;
 }
 void
 CompositorParent::NotifyChildCreated(uint64_t aChild)
 {
   sIndirectLayerTrees[aChild].mParent = this;
   sIndirectLayerTrees[aChild].mLayerManager = mLayerManager;
 }
 /*static*/ uint64_t
 CompositorParent::AllocateLayerTreeId()
 {
   MOZ_ASSERT(CompositorLoop());
   MOZ_ASSERT(NS_IsMainThread());
   static uint64_t ids = 0;
   return ++ids;
 }
 static void
 EraseLayerState(uint64_t aId)
 {
   sIndirectLayerTrees.erase(aId);
 }
 /*static*/ void
 CompositorParent::DeallocateLayerTreeId(uint64_t aId)
 {
   MOZ_ASSERT(NS_IsMainThread());
   CompositorLoop()->PostTask(FROM_HERE,
                              NewRunnableFunction(&EraseLayerState, aId));
 }
 static void
 UpdateControllerForLayersId(uint64_t aLayersId,
                             GeckoContentController* aController)
 {
   // Adopt ref given to us by SetControllerForLayerTree()
   sIndirectLayerTrees[aLayersId].mController =
     already_AddRefed<GeckoContentController>(aController);
 }
 ScopedLayerTreeRegistration::ScopedLayerTreeRegistration(uint64_t aLayersId,
                                                          Layer* aRoot,
                                                          GeckoContentController* aController)
     : mLayersId(aLayersId)
 {
   sIndirectLayerTrees[aLayersId].mRoot = aRoot;
   sIndirectLayerTrees[aLayersId].mController = aController;
 }
 ScopedLayerTreeRegistration::~ScopedLayerTreeRegistration()
 {
   sIndirectLayerTrees.erase(mLayersId);
 }
 /*static*/ void
 CompositorParent::SetControllerForLayerTree(uint64_t aLayersId,
                                             GeckoContentController* aController)
 {
   // This ref is adopted by UpdateControllerForLayersId().
   aController->AddRef();
   CompositorLoop()->PostTask(FROM_HERE,
                              NewRunnableFunction(&UpdateControllerForLayersId,
                                                  aLayersId,
                                                  aController));
 }
 /*static*/ APZCTreeManager*
 CompositorParent::GetAPZCTreeManager(uint64_t aLayersId)
 {
   const CompositorParent::LayerTreeState* state = CompositorParent::GetIndirectShadowTree(aLayersId);
   if (state && state->mParent) {
     return state->mParent->mApzcTreeManager;
   }
   return nullptr;
 }
 float
 CompositorParent::ComputeRenderIntegrity()
 {
   if (mLayerManager) {
     return mLayerManager->ComputeRenderIntegrity();
   }
   return 1.0f;
 }
 /**
  * This class handles layer updates pushed directly from child
  * processes to the compositor thread.  It's associated with a
  * CompositorParent on the compositor thread.  While it uses the
  * PCompositor protocol to manage these updates, it doesn't actually
  * drive compositing itself.  For that it hands off work to the
  * CompositorParent it's associated with.
  */
 class CrossProcessCompositorParent MOZ_FINAL : public PCompositorParent,
                                                public ShadowLayersManager
 {
   friend class CompositorParent;
   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CrossProcessCompositorParent)
 public:
   CrossProcessCompositorParent(Transport* aTransport)
     : mTransport(aTransport)
   {}
   // IToplevelProtocol::CloneToplevel()
   virtual IToplevelProtocol*
   CloneToplevel(const InfallibleTArray<mozilla::ipc::ProtocolFdMapping>& aFds,
                 base::ProcessHandle aPeerProcess,
                 mozilla::ipc::ProtocolCloneContext* aCtx) MOZ_OVERRIDE;
   virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
   // FIXME/bug 774388: work out what shutdown protocol we need.
   virtual bool RecvWillStop() MOZ_OVERRIDE { return true; }
   virtual bool RecvStop() MOZ_OVERRIDE { return true; }
   virtual bool RecvPause() MOZ_OVERRIDE { return true; }
   virtual bool RecvResume() MOZ_OVERRIDE { return true; }
   virtual bool RecvNotifyChildCreated(const uint64_t& child) MOZ_OVERRIDE;
   virtual bool RecvMakeSnapshot(const SurfaceDescriptor& aInSnapshot,
                                 SurfaceDescriptor* aOutSnapshot)
   { return true; }
   virtual bool RecvFlushRendering() MOZ_OVERRIDE { return true; }
   virtual bool RecvNotifyRegionInvalidated(const nsIntRegion& aRegion) { return true; }
   virtual bool RecvStartFrameTimeRecording(const int32_t& aBufferSize, uint32_t* aOutStartIndex) MOZ_OVERRIDE { return true; }
   virtual bool RecvStopFrameTimeRecording(const uint32_t& aStartIndex, InfallibleTArray<float>* intervals) MOZ_OVERRIDE  { return true; }
   virtual PLayerTransactionParent*
     AllocPLayerTransactionParent(const nsTArray<LayersBackend>& aBackendHints,
                                  const uint64_t& aId,
                                  TextureFactoryIdentifier* aTextureFactoryIdentifier,
                                  bool *aSuccess) MOZ_OVERRIDE;
   virtual bool DeallocPLayerTransactionParent(PLayerTransactionParent* aLayers) MOZ_OVERRIDE;
   virtual void ShadowLayersUpdated(LayerTransactionParent* aLayerTree,
                                    const TargetConfig& aTargetConfig,
                                    bool aIsFirstPaint,
                                    bool aScheduleComposite) MOZ_OVERRIDE;
   virtual void ForceComposite(LayerTransactionParent* aLayerTree) MOZ_OVERRIDE;
   virtual bool SetTestSampleTime(LayerTransactionParent* aLayerTree,
                                  const TimeStamp& aTime) MOZ_OVERRIDE;
   virtual void LeaveTestMode(LayerTransactionParent* aLayerTree) MOZ_OVERRIDE;
   virtual AsyncCompositionManager* GetCompositionManager(LayerTransactionParent* aParent) MOZ_OVERRIDE;
 private:
   // Private destructor, to discourage deletion outside of Release():
   virtual ~CrossProcessCompositorParent();
   void DeferredDestroy();
   // There can be many CPCPs, and IPDL-generated code doesn't hold a
   // reference to top-level actors.  So we hold a reference to
   // ourself.  This is released (deferred) in ActorDestroy().
   nsRefPtr<CrossProcessCompositorParent> mSelfRef;
   Transport* mTransport;
 };
 static void
 OpenCompositor(CrossProcessCompositorParent* aCompositor,
                Transport* aTransport, ProcessHandle aHandle,
                MessageLoop* aIOLoop)
 {
   DebugOnly<bool> ok = aCompositor->Open(aTransport, aHandle, aIOLoop);
   MOZ_ASSERT(ok);
 }
 /*static*/ PCompositorParent*
 CompositorParent::Create(Transport* aTransport, ProcessId aOtherProcess)
 {
   nsRefPtr<CrossProcessCompositorParent> cpcp =
     new CrossProcessCompositorParent(aTransport);
   ProcessHandle handle;
   if (!base::OpenProcessHandle(aOtherProcess, &handle)) {
     // XXX need to kill |aOtherProcess|, it's boned
     return nullptr;
   }
   cpcp->mSelfRef = cpcp;
   CompositorLoop()->PostTask(
     FROM_HERE,
     NewRunnableFunction(OpenCompositor, cpcp.get(),
                         aTransport, handle, XRE_GetIOMessageLoop()));
   // The return value is just compared to null for success checking,
   // we're not sharing a ref.
   return cpcp.get();
 }
 IToplevelProtocol*
 CompositorParent::CloneToplevel(const InfallibleTArray<mozilla::ipc::ProtocolFdMapping>& aFds,
                                 base::ProcessHandle aPeerProcess,
                                 mozilla::ipc::ProtocolCloneContext* aCtx)
 {
   for (unsigned int i = 0; i < aFds.Length(); i++) {
     if (aFds[i].protocolId() == (unsigned)GetProtocolId()) {
       Transport* transport = OpenDescriptor(aFds[i].fd(),
                                             Transport::MODE_SERVER);
       PCompositorParent* compositor = Create(transport, base::GetProcId(aPeerProcess));
       compositor->CloneManagees(this, aCtx);
       compositor->IToplevelProtocol::SetTransport(transport);
       return compositor;
     }
   }
   return nullptr;
 }
 static void
 UpdateIndirectTree(uint64_t aId, Layer* aRoot, const TargetConfig& aTargetConfig)
 {
   sIndirectLayerTrees[aId].mRoot = aRoot;
   sIndirectLayerTrees[aId].mTargetConfig = aTargetConfig;
 }
 /* static */ const CompositorParent::LayerTreeState*
 CompositorParent::GetIndirectShadowTree(uint64_t aId)
 {
   LayerTreeMap::const_iterator cit = sIndirectLayerTrees.find(aId);
   if (sIndirectLayerTrees.end() == cit) {
     return nullptr;
   }
   return &cit->second;
 }
 static void
 RemoveIndirectTree(uint64_t aId)
 {
   sIndirectLayerTrees.erase(aId);
 }
 void
 CrossProcessCompositorParent::ActorDestroy(ActorDestroyReason aWhy)
 {
   MessageLoop::current()->PostTask(
     FROM_HERE,
     NewRunnableMethod(this, &CrossProcessCompositorParent::DeferredDestroy));
 }
 PLayerTransactionParent*
 CrossProcessCompositorParent::AllocPLayerTransactionParent(const nsTArray<LayersBackend>&,
                                                            const uint64_t& aId,
                                                            TextureFactoryIdentifier* aTextureFactoryIdentifier,
                                                            bool *aSuccess)
 {
   MOZ_ASSERT(aId != 0);
   if (sIndirectLayerTrees[aId].mLayerManager) {
     sIndirectLayerTrees[aId].mCrossProcessParent = this;
     LayerManagerComposite* lm = sIndirectLayerTrees[aId].mLayerManager;
     *aTextureFactoryIdentifier = lm->GetCompositor()->GetTextureFactoryIdentifier();
     *aSuccess = true;
     LayerTransactionParent* p = new LayerTransactionParent(lm, this, aId);
     p->AddIPDLReference();
     return p;
   }
   NS_WARNING("Created child without a matching parent?");
   // XXX: should be false, but that causes us to fail some tests on Mac w/ OMTC.
   // Bug 900745. change *aSuccess to false to see test failures.
   *aSuccess = true;
   LayerTransactionParent* p = new LayerTransactionParent(nullptr, this, aId);
   p->AddIPDLReference();
   return p;
 }
 bool
 CrossProcessCompositorParent::DeallocPLayerTransactionParent(PLayerTransactionParent* aLayers)
 {
   LayerTransactionParent* slp = static_cast<LayerTransactionParent*>(aLayers);
   RemoveIndirectTree(slp->GetId());
   static_cast<LayerTransactionParent*>(aLayers)->ReleaseIPDLReference();
   return true;
 }
 bool
 CrossProcessCompositorParent::RecvNotifyChildCreated(const uint64_t& child)
 {
   sIndirectLayerTrees[child].mParent->NotifyChildCreated(child);
   return true;
 }
 void
 CrossProcessCompositorParent::ShadowLayersUpdated(
   LayerTransactionParent* aLayerTree,
   const TargetConfig& aTargetConfig,
   bool aIsFirstPaint,
   bool aScheduleComposite)
 {
   uint64_t id = aLayerTree->GetId();
   MOZ_ASSERT(id != 0);
   Layer* shadowRoot = aLayerTree->GetRoot();
   if (shadowRoot) {
     SetShadowProperties(shadowRoot);
   }
   UpdateIndirectTree(id, shadowRoot, aTargetConfig);
   sIndirectLayerTrees[id].mParent->NotifyShadowTreeTransaction(id, aIsFirstPaint, aScheduleComposite);
 }
 void
 CrossProcessCompositorParent::ForceComposite(LayerTransactionParent* aLayerTree)
 {
   uint64_t id = aLayerTree->GetId();
   MOZ_ASSERT(id != 0);
   sIndirectLayerTrees[id].mParent->ForceComposite(aLayerTree);
 }
 bool
 CrossProcessCompositorParent::SetTestSampleTime(
   LayerTransactionParent* aLayerTree, const TimeStamp& aTime)
 {
   uint64_t id = aLayerTree->GetId();
   MOZ_ASSERT(id != 0);
   return sIndirectLayerTrees[id].mParent->SetTestSampleTime(aLayerTree, aTime);
 }
 void
 CrossProcessCompositorParent::LeaveTestMode(LayerTransactionParent* aLayerTree)
 {
   uint64_t id = aLayerTree->GetId();
   MOZ_ASSERT(id != 0);
   sIndirectLayerTrees[id].mParent->LeaveTestMode(aLayerTree);
 }
 AsyncCompositionManager*
 CrossProcessCompositorParent::GetCompositionManager(LayerTransactionParent* aLayerTree)
 {
   uint64_t id = aLayerTree->GetId();
   return sIndirectLayerTrees[id].mParent->GetCompositionManager(aLayerTree);
 }
 void
 CrossProcessCompositorParent::DeferredDestroy()
 {
   CrossProcessCompositorParent* self;
   mSelfRef.forget(&self);
   nsCOMPtr<nsIRunnable> runnable =
     NS_NewNonOwningRunnableMethod(self, &CrossProcessCompositorParent::Release);
   MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToMainThread(runnable)));
 }
 CrossProcessCompositorParent::~CrossProcessCompositorParent()
 {
   XRE_GetIOMessageLoop()->PostTask(FROM_HERE,
                                    new DeleteTask<Transport>(mTransport));
 }
 IToplevelProtocol*
 CrossProcessCompositorParent::CloneToplevel(const InfallibleTArray<mozilla::ipc::ProtocolFdMapping>& aFds,
                                             base::ProcessHandle aPeerProcess,
                                             mozilla::ipc::ProtocolCloneContext* aCtx)
 {
   for (unsigned int i = 0; i < aFds.Length(); i++) {
     if (aFds[i].protocolId() == (unsigned)GetProtocolId()) {
       Transport* transport = OpenDescriptor(aFds[i].fd(),
                                             Transport::MODE_SERVER);
       PCompositorParent* compositor =
         CompositorParent::Create(transport, base::GetProcId(aPeerProcess));
       compositor->CloneManagees(this, aCtx);
       compositor->IToplevelProtocol::SetTransport(transport);
       return compositor;
     }
   }
   return nullptr;
 }
 } // namespace layers
 } // namespace mozilla

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gfx/layers/ipc/CompositorParent.cpp@97036ab72558 (annotated)

gfx/layers/ipc/CompositorParent.cpp