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gecko-dev/gfx/layers/client/TextureClient.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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 "mozilla/layers/TextureClient.h"
#include <stdint.h> // for uint8_t, uint32_t, etc
#include "Layers.h" // for Layer, etc
#include "gfx2DGlue.h"
#include "gfxPlatform.h" // for gfxPlatform
#include "mozilla/Atomics.h"
#include "mozilla/SystemGroup.h"
#include "mozilla/ipc/SharedMemory.h" // for SharedMemory, etc
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/layers/ISurfaceAllocator.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "mozilla/layers/ImageDataSerializer.h"
#include "mozilla/layers/PaintThread.h"
#include "mozilla/layers/TextureClientRecycleAllocator.h"
#include "mozilla/Mutex.h"
#include "nsDebug.h" // for NS_ASSERTION, NS_WARNING, etc
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
#include "ImageContainer.h" // for PlanarYCbCrData, etc
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Logging.h" // for gfxDebug
#include "mozilla/layers/TextureClientOGL.h"
#include "mozilla/layers/PTextureChild.h"
#include "mozilla/gfx/DataSurfaceHelpers.h" // for CreateDataSourceSurfaceByCloning
#include "nsPrintfCString.h" // for nsPrintfCString
#include "LayersLogging.h" // for AppendToString
#include "gfxUtils.h" // for gfxUtils::GetAsLZ4Base64Str
#include "IPDLActor.h"
#include "BufferTexture.h"
#include "gfxPrefs.h"
#include "mozilla/layers/ShadowLayers.h"
#include "mozilla/ipc/CrossProcessSemaphore.h"
#ifdef XP_WIN
#include "mozilla/gfx/DeviceManagerDx.h"
#include "mozilla/layers/TextureD3D11.h"
#include "mozilla/layers/TextureDIB.h"
#include "gfxWindowsPlatform.h"
#include "gfx2DGlue.h"
#endif
#ifdef MOZ_X11
#include "mozilla/layers/TextureClientX11.h"
#ifdef GL_PROVIDER_GLX
#include "GLXLibrary.h"
#endif
#endif
#ifdef XP_MACOSX
#include "mozilla/layers/MacIOSurfaceTextureClientOGL.h"
#endif
#if 0
#define RECYCLE_LOG(...) printf_stderr(__VA_ARGS__)
#else
#define RECYCLE_LOG(...) do { } while (0)
#endif
namespace mozilla {
namespace layers {
using namespace mozilla::ipc;
using namespace mozilla::gl;
using namespace mozilla::gfx;
struct TextureDeallocParams
{
TextureData* data;
RefPtr<TextureChild> actor;
RefPtr<LayersIPCChannel> allocator;
bool clientDeallocation;
bool syncDeallocation;
bool workAroundSharedSurfaceOwnershipIssue;
};
void DeallocateTextureClient(TextureDeallocParams params);
/**
* TextureChild is the content-side incarnation of the PTexture IPDL actor.
*
* TextureChild is used to synchronize a texture client and its corresponding
* TextureHost if needed (a TextureClient that is not shared with the compositor
* does not have a TextureChild)
*
* During the deallocation phase, a TextureChild may hold its recently destroyed
* TextureClient's data until the compositor side confirmed that it is safe to
* deallocte or recycle the it.
*/
class TextureChild final : PTextureChild
{
~TextureChild()
{
// We should have deallocated mTextureData in ActorDestroy
MOZ_ASSERT(!mTextureData);
MOZ_ASSERT_IF(!mOwnerCalledDestroy, !mTextureClient);
}
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TextureChild)
TextureChild()
: mCompositableForwarder(nullptr)
, mTextureForwarder(nullptr)
, mTextureClient(nullptr)
, mTextureData(nullptr)
, mDestroyed(false)
, mMainThreadOnly(false)
, mIPCOpen(false)
, mOwnsTextureData(false)
, mOwnerCalledDestroy(false)
{}
mozilla::ipc::IPCResult Recv__delete__() override { return IPC_OK(); }
LayersIPCChannel* GetAllocator() { return mTextureForwarder; }
void ActorDestroy(ActorDestroyReason why) override;
bool IPCOpen() const { return mIPCOpen; }
void Lock() const { if (mCompositableForwarder && mCompositableForwarder->GetTextureForwarder()->UsesImageBridge()) { mLock.Enter(); } }
void Unlock() const { if (mCompositableForwarder && mCompositableForwarder->GetTextureForwarder()->UsesImageBridge()) { mLock.Leave(); } }
private:
// AddIPDLReference and ReleaseIPDLReference are only to be called by CreateIPDLActor
// and DestroyIPDLActor, respectively. We intentionally make them private to prevent misuse.
// The purpose of these methods is to be aware of when the IPC system around this
// actor goes down: mIPCOpen is then set to false.
void AddIPDLReference() {
MOZ_ASSERT(mIPCOpen == false);
mIPCOpen = true;
AddRef();
}
void ReleaseIPDLReference() {
MOZ_ASSERT(mIPCOpen == false);
Release();
}
/// The normal way to destroy the actor.
///
/// This will asynchronously send a Destroy message to the parent actor, whom
/// will send the delete message.
void Destroy(const TextureDeallocParams& aParams);
// This lock is used order to prevent several threads to access the
// TextureClient's data concurrently. In particular, it prevents shutdown
// code to destroy a texture while another thread is reading or writing into
// it.
// In most places, the lock is held in short and bounded scopes in which we
// don't block on any other resource. There are few exceptions to this, which
// are discussed below.
//
// The locking pattern of TextureClient may in some case upset deadlock detection
// tools such as TSan.
// Typically our tile rendering code will lock all of its tiles, render into them
// and unlock them all right after that, which looks something like:
//
// Lock tile A
// Lock tile B
// Lock tile C
// Apply drawing commands to tiles A, B and C
// Unlock tile A
// Unlock tile B
// Unlock tile C
//
// And later, we may end up rendering a tile buffer that has the same tiles,
// in a different order, for example:
//
// Lock tile B
// Lock tile A
// Lock tile D
// Apply drawing commands to tiles A, B and D
// Unlock tile B
// Unlock tile A
// Unlock tile D
//
// This is because textures being expensive to create, we recycle them as much
// as possible and they may reappear in the tile buffer in a different order.
//
// Unfortunately this is not very friendly to TSan's analysis, which will see
// that B was once locked while A was locked, and then A locked while B was
// locked. TSan identifies this as a potential dead-lock which would be the
// case if this kind of inconsistent and dependent locking order was happening
// concurrently.
// In the case of TextureClient, dependent locking only ever happens on the
// thread that draws into the texture (let's call it the producer thread). Other
// threads may call into a method that can lock the texture in a short and
// bounded scope inside of which it is not allowed to do anything that could
// cause the thread to block. A given texture can only have one producer thread.
//
// Another example of TSan-unfriendly locking pattern is when copying a texture
// into another, which also never happens outside of the producer thread.
// Copying A into B looks like this:
//
// Lock texture B
// Lock texture A
// Copy A into B
// Unlock A
// Unlock B
//
// In a given frame we may need to copy A into B and in another frame copy
// B into A. For example A and B can be the Front and Back buffers, alternating
// roles and the copy is needed to avoid the cost of re-drawing the valid
// region.
//
// The important rule is that all of the dependent locking must occur only
// in the texture's producer thread to avoid deadlocks.
mutable gfx::CriticalSection mLock;
RefPtr<CompositableForwarder> mCompositableForwarder;
RefPtr<TextureForwarder> mTextureForwarder;
TextureClient* mTextureClient;
TextureData* mTextureData;
Atomic<bool> mDestroyed;
bool mMainThreadOnly;
bool mIPCOpen;
bool mOwnsTextureData;
bool mOwnerCalledDestroy;
friend class TextureClient;
friend void DeallocateTextureClient(TextureDeallocParams params);
};
static void DestroyTextureData(TextureData* aTextureData, LayersIPCChannel* aAllocator,
bool aDeallocate, bool aMainThreadOnly)
{
if (!aTextureData) {
return;
}
if (aMainThreadOnly && !NS_IsMainThread()) {
RefPtr<LayersIPCChannel> allocatorRef = aAllocator;
SystemGroup::Dispatch(TaskCategory::Other, NS_NewRunnableFunction(
"layers::DestroyTextureData",
[aTextureData, allocatorRef, aDeallocate]() -> void {
DestroyTextureData(aTextureData, allocatorRef, aDeallocate, true);
}));
return;
}
if (aDeallocate) {
aTextureData->Deallocate(aAllocator);
} else {
aTextureData->Forget(aAllocator);
}
delete aTextureData;
}
void
TextureChild::ActorDestroy(ActorDestroyReason why)
{
AUTO_PROFILER_LABEL("TextureChild::ActorDestroy", GRAPHICS);
MOZ_ASSERT(mIPCOpen);
mIPCOpen = false;
if (mTextureData) {
DestroyTextureData(mTextureData, GetAllocator(), mOwnsTextureData, mMainThreadOnly);
mTextureData = nullptr;
}
}
void
TextureChild::Destroy(const TextureDeallocParams& aParams)
{
MOZ_ASSERT(!mOwnerCalledDestroy);
if (mOwnerCalledDestroy) {
return;
}
mOwnerCalledDestroy = true;
if (!IPCOpen()) {
DestroyTextureData(
aParams.data,
aParams.allocator,
aParams.clientDeallocation,
mMainThreadOnly);
return;
}
// DestroyTextureData will be called by TextureChild::ActorDestroy
mTextureData = aParams.data;
mOwnsTextureData = aParams.clientDeallocation;
if (!mCompositableForwarder ||
!mCompositableForwarder->DestroyInTransaction(this))
{
this->SendDestroy();
}
}
/* static */ Atomic<uint64_t> TextureClient::sSerialCounter(0);
void DeallocateTextureClientSyncProxy(TextureDeallocParams params,
ReentrantMonitor* aBarrier, bool* aDone)
{
DeallocateTextureClient(params);
ReentrantMonitorAutoEnter autoMon(*aBarrier);
*aDone = true;
aBarrier->NotifyAll();
}
/// The logic for synchronizing a TextureClient's deallocation goes here.
///
/// This funciton takes care of dispatching work to the right thread using
/// a synchronous proxy if needed, and handles client/host deallocation.
void
DeallocateTextureClient(TextureDeallocParams params)
{
if (!params.actor && !params.data) {
// Nothing to do
return;
}
TextureChild* actor = params.actor;
MessageLoop* ipdlMsgLoop = nullptr;
if (params.allocator) {
ipdlMsgLoop = params.allocator->GetMessageLoop();
if (!ipdlMsgLoop) {
// An allocator with no message loop means we are too late in the shutdown
// sequence.
gfxCriticalError() << "Texture deallocated too late during shutdown";
return;
}
}
// First make sure that the work is happening on the IPDL thread.
if (ipdlMsgLoop && MessageLoop::current() != ipdlMsgLoop) {
if (params.syncDeallocation) {
bool done = false;
ReentrantMonitor barrier("DeallocateTextureClient");
ReentrantMonitorAutoEnter autoMon(barrier);
ipdlMsgLoop->PostTask(NewRunnableFunction("DeallocateTextureClientSyncProxyRunnable",
DeallocateTextureClientSyncProxy,
params, &barrier, &done));
while (!done) {
barrier.Wait();
}
} else {
ipdlMsgLoop->PostTask(NewRunnableFunction("DeallocateTextureClientRunnable",
DeallocateTextureClient,
params));
}
// The work has been forwarded to the IPDL thread, we are done.
return;
}
// Below this line, we are either in the IPDL thread or ther is no IPDL
// thread anymore.
if (!ipdlMsgLoop) {
// If we don't have a message loop we can't know for sure that we are in
// the IPDL thread and use the LayersIPCChannel.
// This should ideally not happen outside of gtest, but some shutdown raciness
// could put us in this situation.
params.allocator = nullptr;
}
if (!actor) {
// We don't have an IPDL actor, probably because we destroyed the TextureClient
// before sharing it with the compositor. It means the data cannot be owned by
// the TextureHost since we never created the TextureHost...
// ..except if the lovely mWorkaroundAnnoyingSharedSurfaceOwnershipIssues member
// is set to true. In this case we are in a special situation where this
// TextureClient is in wrapped into another TextureClient which assumes it owns
// our data.
bool shouldDeallocate = !params.workAroundSharedSurfaceOwnershipIssue;
DestroyTextureData(params.data, params.allocator,
shouldDeallocate,
false); // main-thread deallocation
return;
}
actor->Destroy(params);
}
void TextureClient::Destroy()
{
// Async paints should have been flushed by now.
MOZ_RELEASE_ASSERT(mPaintThreadRefs == 0);
if (mActor && !mIsLocked) {
mActor->Lock();
}
mBorrowedDrawTarget = nullptr;
mReadLock = nullptr;
RefPtr<TextureChild> actor = mActor;
mActor = nullptr;
if (actor && !actor->mDestroyed.compareExchange(false, true)) {
actor->Unlock();
actor = nullptr;
}
TextureData* data = mData;
if (!mWorkaroundAnnoyingSharedSurfaceLifetimeIssues) {
mData = nullptr;
}
if (data || actor) {
TextureDeallocParams params;
params.actor = actor;
params.allocator = mAllocator;
params.clientDeallocation = !!(mFlags & TextureFlags::DEALLOCATE_CLIENT);
params.workAroundSharedSurfaceOwnershipIssue = mWorkaroundAnnoyingSharedSurfaceOwnershipIssues;
if (mWorkaroundAnnoyingSharedSurfaceLifetimeIssues) {
params.data = nullptr;
} else {
params.data = data;
}
// At the moment we always deallocate synchronously when deallocating on the
// client side, but having asynchronous deallocate in some of the cases will
// be a worthwhile optimization.
params.syncDeallocation = !!(mFlags & TextureFlags::DEALLOCATE_CLIENT);
// Release the lock before calling DeallocateTextureClient because the latter
// may wait for the main thread which could create a dead-lock.
if (actor) {
actor->Unlock();
}
DeallocateTextureClient(params);
}
}
void
TextureClient::LockActor() const
{
if (mActor) {
mActor->Lock();
}
}
void
TextureClient::UnlockActor() const
{
if (mActor) {
mActor->Unlock();
}
}
bool
TextureClient::IsReadLocked() const
{
if (!mReadLock) {
return false;
}
MOZ_ASSERT(mReadLock->AsNonBlockingLock(), "Can only check locked for non-blocking locks!");
return mReadLock->AsNonBlockingLock()->GetReadCount() > 1;
}
bool
TextureClient::TryReadLock()
{
if (!mReadLock || mIsReadLocked) {
return true;
}
if (mReadLock->AsNonBlockingLock()) {
if (IsReadLocked()) {
return false;
}
}
if (!mReadLock->TryReadLock(TimeDuration::FromMilliseconds(500))) {
return false;
}
mIsReadLocked = true;
return true;
}
void
TextureClient::ReadUnlock()
{
if (!mIsReadLocked) {
return;
}
MOZ_ASSERT(mReadLock);
mReadLock->ReadUnlock();
mIsReadLocked = false;
}
bool
TextureClient::Lock(OpenMode aMode)
{
MOZ_ASSERT(IsValid());
MOZ_ASSERT(!mIsLocked);
if (!IsValid()) {
return false;
}
if (mIsLocked) {
return mOpenMode == aMode;
}
if ((aMode & OpenMode::OPEN_WRITE || !mInfo.canConcurrentlyReadLock) && !TryReadLock()) {
// Only warn if attempting to write. Attempting to read is acceptable usage.
if (aMode & OpenMode::OPEN_WRITE) {
NS_WARNING("Attempt to Lock a texture that is being read by the compositor!");
}
return false;
}
LockActor();
mIsLocked = mData->Lock(aMode);
mOpenMode = aMode;
auto format = GetFormat();
if (mIsLocked && CanExposeDrawTarget() &&
(aMode & OpenMode::OPEN_READ_WRITE) == OpenMode::OPEN_READ_WRITE &&
NS_IsMainThread() &&
// the formats that we apparently expect, in the cairo backend. Any other
// format will trigger an assertion in GfxFormatToCairoFormat.
(format == SurfaceFormat::A8R8G8B8_UINT32 ||
format == SurfaceFormat::X8R8G8B8_UINT32 ||
format == SurfaceFormat::A8 ||
format == SurfaceFormat::R5G6B5_UINT16)) {
if (!BorrowDrawTarget()) {
// Failed to get a DrawTarget, means we won't be able to write into the
// texture, might as well fail now.
Unlock();
return false;
}
}
if (!mIsLocked) {
UnlockActor();
ReadUnlock();
}
return mIsLocked;
}
void
TextureClient::Unlock()
{
MOZ_ASSERT(IsValid());
MOZ_ASSERT(mIsLocked);
if (!IsValid() || !mIsLocked) {
return;
}
if (mBorrowedDrawTarget) {
if (!(mOpenMode & OpenMode::OPEN_ASYNC)) {
if (mOpenMode & OpenMode::OPEN_WRITE) {
mBorrowedDrawTarget->Flush();
if (mReadbackSink && !mData->ReadBack(mReadbackSink)) {
// Fallback implementation for reading back, because mData does not
// have a backend-specific implementation and returned false.
RefPtr<SourceSurface> snapshot = mBorrowedDrawTarget->Snapshot();
RefPtr<DataSourceSurface> dataSurf = snapshot->GetDataSurface();
mReadbackSink->ProcessReadback(dataSurf);
}
}
mBorrowedDrawTarget->DetachAllSnapshots();
// If this assertion is hit, it means something is holding a strong reference
// to our DrawTarget externally, which is not allowed.
MOZ_ASSERT(mBorrowedDrawTarget->refCount() <= mExpectedDtRefs);
}
mBorrowedDrawTarget = nullptr;
}
if (mOpenMode & OpenMode::OPEN_WRITE) {
mUpdated = true;
}
if (mData) {
mData->Unlock();
}
mIsLocked = false;
mOpenMode = OpenMode::OPEN_NONE;
UnlockActor();
ReadUnlock();
}
void
TextureClient::EnableReadLock()
{
if (!mReadLock) {
if (mAllocator->GetTileLockAllocator()) {
mReadLock = NonBlockingTextureReadLock::Create(mAllocator);
} else {
// IPC is down
gfxCriticalError() << "TextureClient::EnableReadLock IPC is down";
}
}
}
bool
TextureClient::OnForwardedToHost()
{
if (mData) {
mData->OnForwardedToHost();
}
if (mReadLock && mUpdated) {
// Take a read lock on behalf of the TextureHost. The latter will unlock
// after the shared data is available again for drawing.
mReadLock->ReadLock();
mUpdated = false;
return true;
}
return false;
}
TextureClient::~TextureClient()
{
// TextureClients should be kept alive while there are references on the
// paint thread.
MOZ_ASSERT(mPaintThreadRefs == 0);
mReadLock = nullptr;
Destroy();
}
void
TextureClient::UpdateFromSurface(gfx::SourceSurface* aSurface)
{
MOZ_ASSERT(IsValid());
MOZ_ASSERT(mIsLocked);
MOZ_ASSERT(aSurface);
// If you run into this assertion, make sure the texture was locked write-only
// rather than read-write.
MOZ_ASSERT(!mBorrowedDrawTarget);
// XXX - It would be better to first try the DrawTarget approach and fallback
// to the backend-specific implementation because the latter will usually do
// an expensive read-back + cpu-side copy if the texture is on the gpu.
// There is a bug with the DrawTarget approach, though specific to reading back
// from WebGL (where R and B channel end up inverted) to figure out first.
if (mData->UpdateFromSurface(aSurface)) {
return;
}
if (CanExposeDrawTarget() && NS_IsMainThread()) {
RefPtr<DrawTarget> dt = BorrowDrawTarget();
MOZ_ASSERT(dt);
if (dt) {
dt->CopySurface(aSurface,
gfx::IntRect(gfx::IntPoint(0, 0), aSurface->GetSize()),
gfx::IntPoint(0, 0));
return;
}
}
NS_WARNING("TextureClient::UpdateFromSurface failed");
}
already_AddRefed<TextureClient>
TextureClient::CreateSimilar(LayersBackend aLayersBackend, TextureFlags aFlags, TextureAllocationFlags aAllocFlags) const
{
MOZ_ASSERT(IsValid());
MOZ_ASSERT(!mIsLocked);
if (mIsLocked) {
return nullptr;
}
LockActor();
TextureData* data = mData->CreateSimilar(mAllocator, aLayersBackend, aFlags, aAllocFlags);
UnlockActor();
if (!data) {
return nullptr;
}
return MakeAndAddRef<TextureClient>(data, aFlags, mAllocator);
}
gfx::DrawTarget*
TextureClient::BorrowDrawTarget()
{
MOZ_ASSERT(IsValid());
MOZ_ASSERT(mIsLocked);
// TODO- We can't really assert that at the moment because there is code that Borrows
// the DrawTarget, just to get a snapshot, which is legit in term of OpenMode
// but we should have a way to get a SourceSurface directly instead.
//MOZ_ASSERT(mOpenMode & OpenMode::OPEN_WRITE);
if (!IsValid() || !mIsLocked) {
return nullptr;
}
if (!mBorrowedDrawTarget) {
mBorrowedDrawTarget = mData->BorrowDrawTarget();
#ifdef DEBUG
mExpectedDtRefs = mBorrowedDrawTarget ? mBorrowedDrawTarget->refCount() : 0;
#endif
}
return mBorrowedDrawTarget;
}
bool
TextureClient::BorrowMappedData(MappedTextureData& aMap)
{
MOZ_ASSERT(IsValid());
// TODO - SharedRGBImage just accesses the buffer without properly locking
// the texture. It's bad.
//MOZ_ASSERT(mIsLocked);
//if (!mIsLocked) {
// return nullptr;
//}
return mData ? mData->BorrowMappedData(aMap) : false;
}
bool
TextureClient::BorrowMappedYCbCrData(MappedYCbCrTextureData& aMap)
{
MOZ_ASSERT(IsValid());
return mData ? mData->BorrowMappedYCbCrData(aMap) : false;
}
bool
TextureClient::ToSurfaceDescriptor(SurfaceDescriptor& aOutDescriptor)
{
MOZ_ASSERT(IsValid());
return mData ? mData->Serialize(aOutDescriptor) : false;
}
// static
PTextureChild*
TextureClient::CreateIPDLActor()
{
TextureChild* c = new TextureChild();
c->AddIPDLReference();
return c;
}
// static
bool
TextureClient::DestroyIPDLActor(PTextureChild* actor)
{
static_cast<TextureChild*>(actor)->ReleaseIPDLReference();
return true;
}
// static
already_AddRefed<TextureClient>
TextureClient::AsTextureClient(PTextureChild* actor)
{
if (!actor) {
return nullptr;
}
TextureChild* tc = static_cast<TextureChild*>(actor);
tc->Lock();
// Since TextureClient may be destroyed asynchronously with respect to its
// IPDL actor, we must acquire a reference within a lock. The mDestroyed bit
// tells us whether or not the main thread has disconnected the TextureClient
// from its actor.
if (tc->mDestroyed) {
tc->Unlock();
return nullptr;
}
RefPtr<TextureClient> texture = tc->mTextureClient;
tc->Unlock();
return texture.forget();
}
bool
TextureClient::IsSharedWithCompositor() const {
return mActor && mActor->IPCOpen();
}
void
TextureClient::AddFlags(TextureFlags aFlags)
{
MOZ_ASSERT(!IsSharedWithCompositor() ||
((GetFlags() & TextureFlags::RECYCLE) && !IsAddedToCompositableClient()));
mFlags |= aFlags;
}
void
TextureClient::RemoveFlags(TextureFlags aFlags)
{
MOZ_ASSERT(!IsSharedWithCompositor() ||
((GetFlags() & TextureFlags::RECYCLE) && !IsAddedToCompositableClient()));
mFlags &= ~aFlags;
}
void
TextureClient::RecycleTexture(TextureFlags aFlags)
{
MOZ_ASSERT(GetFlags() & TextureFlags::RECYCLE);
MOZ_ASSERT(!mIsLocked);
mAddedToCompositableClient = false;
if (mFlags != aFlags) {
mFlags = aFlags;
}
}
void
TextureClient::SetAddedToCompositableClient()
{
if (!mAddedToCompositableClient) {
mAddedToCompositableClient = true;
if(!(GetFlags() & TextureFlags::RECYCLE)) {
return;
}
MOZ_ASSERT(!mIsLocked);
LockActor();
if (IsValid() && mActor && !mActor->mDestroyed && mActor->IPCOpen()) {
mActor->SendRecycleTexture(mFlags);
}
UnlockActor();
}
}
void CancelTextureClientRecycle(uint64_t aTextureId, LayersIPCChannel* aAllocator)
{
if (!aAllocator) {
return;
}
MessageLoop* msgLoop = nullptr;
msgLoop = aAllocator->GetMessageLoop();
if (!msgLoop) {
return;
}
if (MessageLoop::current() == msgLoop) {
aAllocator->CancelWaitForRecycle(aTextureId);
} else {
msgLoop->PostTask(NewRunnableFunction("CancelTextureClientRecycleRunnable",
CancelTextureClientRecycle,
aTextureId, aAllocator));
}
}
void
TextureClient::CancelWaitForRecycle()
{
if (GetFlags() & TextureFlags::RECYCLE) {
CancelTextureClientRecycle(mSerial, GetAllocator());
return;
}
}
/* static */ void
TextureClient::TextureClientRecycleCallback(TextureClient* aClient, void* aClosure)
{
MOZ_ASSERT(aClient->GetRecycleAllocator());
aClient->GetRecycleAllocator()->RecycleTextureClient(aClient);
}
void
TextureClient::SetRecycleAllocator(ITextureClientRecycleAllocator* aAllocator)
{
mRecycleAllocator = aAllocator;
if (aAllocator) {
SetRecycleCallback(TextureClientRecycleCallback, nullptr);
} else {
ClearRecycleCallback();
}
}
bool
TextureClient::InitIPDLActor(CompositableForwarder* aForwarder)
{
MOZ_ASSERT(aForwarder && aForwarder->GetTextureForwarder()->GetMessageLoop() == mAllocator->GetMessageLoop());
if (mActor && !mActor->IPCOpen()) {
return false;
}
if (mActor && !mActor->mDestroyed) {
CompositableForwarder* currentFwd = mActor->mCompositableForwarder;
TextureForwarder* currentTexFwd = mActor->mTextureForwarder;
if (currentFwd != aForwarder) {
// It's a bit iffy but right now ShadowLayerForwarder inherits TextureForwarder
// even though it should not. ShadowLayerForwarder::GetTextureForwarder actually
// returns a pointer to the CompositorBridgeChild.
// It's Ok for a texture to move from a ShadowLayerForwarder to another, but
// not form a CompositorBridgeChild to another (they use different channels).
if (currentTexFwd && currentTexFwd != aForwarder->GetTextureForwarder()) {
gfxCriticalError() << "Attempt to move a texture to a different channel CF.";
return false;
}
if (currentFwd && currentFwd->GetCompositorBackendType() != aForwarder->GetCompositorBackendType()) {
gfxCriticalError() << "Attempt to move a texture to different compositor backend.";
return false;
}
if (ShadowLayerForwarder* forwarder = aForwarder->AsLayerForwarder()) {
// Do the DOM labeling.
if (nsIEventTarget* target = forwarder->GetEventTarget()) {
forwarder->GetCompositorBridgeChild()->ReplaceEventTargetForActor(
mActor, target);
}
}
mActor->mCompositableForwarder = aForwarder;
}
return true;
}
MOZ_ASSERT(!mActor || mActor->mDestroyed, "Cannot use a texture on several IPC channels.");
SurfaceDescriptor desc;
if (!ToSurfaceDescriptor(desc)) {
return false;
}
// Try external image id allocation.
mExternalImageId = aForwarder->GetTextureForwarder()->GetNextExternalImageId();
nsIEventTarget* target = nullptr;
// Get the layers id if the forwarder is a ShadowLayerForwarder.
if (ShadowLayerForwarder* forwarder = aForwarder->AsLayerForwarder()) {
target = forwarder->GetEventTarget();
}
ReadLockDescriptor readLockDescriptor = null_t();
if (mReadLock) {
mReadLock->Serialize(readLockDescriptor, GetAllocator()->GetParentPid());
}
PTextureChild* actor = aForwarder->GetTextureForwarder()->CreateTexture(
desc,
readLockDescriptor,
aForwarder->GetCompositorBackendType(),
GetFlags(),
mSerial,
mExternalImageId,
target);
if (!actor) {
gfxCriticalNote << static_cast<int32_t>(desc.type()) << ", "
<< static_cast<int32_t>(aForwarder->GetCompositorBackendType()) << ", "
<< static_cast<uint32_t>(GetFlags())
<< ", " << mSerial;
return false;
}
mActor = static_cast<TextureChild*>(actor);
mActor->mCompositableForwarder = aForwarder;
mActor->mTextureForwarder = aForwarder->GetTextureForwarder();
mActor->mTextureClient = this;
mActor->mMainThreadOnly = !!(mFlags & TextureFlags::DEALLOCATE_MAIN_THREAD);
// If the TextureClient is already locked, we have to lock TextureChild's mutex
// since it will be unlocked in TextureClient::Unlock.
if (mIsLocked) {
LockActor();
}
return mActor->IPCOpen();
}
bool
TextureClient::InitIPDLActor(KnowsCompositor* aForwarder)
{
MOZ_ASSERT(aForwarder && aForwarder->GetTextureForwarder()->GetMessageLoop() == mAllocator->GetMessageLoop());
TextureForwarder* fwd = aForwarder->GetTextureForwarder();
if (mActor && !mActor->mDestroyed) {
CompositableForwarder* currentFwd = mActor->mCompositableForwarder;
TextureForwarder* currentTexFwd = mActor->mTextureForwarder;
if (currentFwd) {
gfxCriticalError() << "Attempt to remove a texture from a CompositableForwarder.";
return false;
}
if (currentTexFwd && currentTexFwd != fwd) {
gfxCriticalError() << "Attempt to move a texture to a different channel TF.";
return false;
}
mActor->mTextureForwarder = fwd;
return true;
}
MOZ_ASSERT(!mActor || mActor->mDestroyed, "Cannot use a texture on several IPC channels.");
SurfaceDescriptor desc;
if (!ToSurfaceDescriptor(desc)) {
return false;
}
// Try external image id allocation.
mExternalImageId = aForwarder->GetTextureForwarder()->GetNextExternalImageId();
ReadLockDescriptor readLockDescriptor = null_t();
if (mReadLock) {
mReadLock->Serialize(readLockDescriptor, GetAllocator()->GetParentPid());
}
PTextureChild* actor = fwd->CreateTexture(
desc,
readLockDescriptor,
aForwarder->GetCompositorBackendType(),
GetFlags(),
mSerial,
mExternalImageId);
if (!actor) {
gfxCriticalNote << static_cast<int32_t>(desc.type()) << ", "
<< static_cast<int32_t>(aForwarder->GetCompositorBackendType()) << ", "
<< static_cast<uint32_t>(GetFlags())
<< ", " << mSerial;
return false;
}
mActor = static_cast<TextureChild*>(actor);
mActor->mTextureForwarder = fwd;
mActor->mTextureClient = this;
mActor->mMainThreadOnly = !!(mFlags & TextureFlags::DEALLOCATE_MAIN_THREAD);
// If the TextureClient is already locked, we have to lock TextureChild's mutex
// since it will be unlocked in TextureClient::Unlock.
if (mIsLocked) {
LockActor();
}
return mActor->IPCOpen();
}
PTextureChild*
TextureClient::GetIPDLActor()
{
return mActor;
}
static inline gfx::BackendType
BackendTypeForBackendSelector(LayersBackend aLayersBackend, BackendSelector aSelector)
{
switch (aSelector) {
case BackendSelector::Canvas:
return gfxPlatform::GetPlatform()->GetPreferredCanvasBackend();
case BackendSelector::Content:
return gfxPlatform::GetPlatform()->GetContentBackendFor(aLayersBackend);
default:
MOZ_ASSERT_UNREACHABLE("Unknown backend selector");
return gfx::BackendType::NONE;
}
};
// static
already_AddRefed<TextureClient>
TextureClient::CreateForDrawing(KnowsCompositor* aAllocator,
gfx::SurfaceFormat aFormat,
gfx::IntSize aSize,
BackendSelector aSelector,
TextureFlags aTextureFlags,
TextureAllocationFlags aAllocFlags)
{
LayersBackend layersBackend = aAllocator->GetCompositorBackendType();
return TextureClient::CreateForDrawing(aAllocator->GetTextureForwarder(),
aFormat, aSize,
layersBackend,
aAllocator->GetMaxTextureSize(),
aSelector,
aTextureFlags,
aAllocFlags);
}
// static
already_AddRefed<TextureClient>
TextureClient::CreateForDrawing(TextureForwarder* aAllocator,
gfx::SurfaceFormat aFormat,
gfx::IntSize aSize,
LayersBackend aLayersBackend,
int32_t aMaxTextureSize,
BackendSelector aSelector,
TextureFlags aTextureFlags,
TextureAllocationFlags aAllocFlags)
{
gfx::BackendType moz2DBackend = BackendTypeForBackendSelector(aLayersBackend, aSelector);
// also test the validity of aAllocator
if (!aAllocator || !aAllocator->IPCOpen()) {
return nullptr;
}
if (!gfx::Factory::AllowedSurfaceSize(aSize)) {
return nullptr;
}
TextureData* data = nullptr;
#ifdef XP_WIN
if ((aLayersBackend == LayersBackend::LAYERS_D3D11 ||
aLayersBackend == LayersBackend::LAYERS_WR) &&
(moz2DBackend == gfx::BackendType::DIRECT2D ||
moz2DBackend == gfx::BackendType::DIRECT2D1_1 ||
(!!(aAllocFlags & ALLOC_FOR_OUT_OF_BAND_CONTENT) &&
DeviceManagerDx::Get()->GetContentDevice())) &&
aSize.width <= aMaxTextureSize &&
aSize.height <= aMaxTextureSize &&
!(aAllocFlags & ALLOC_UPDATE_FROM_SURFACE))
{
data = DXGITextureData::Create(aSize, aFormat, aAllocFlags);
}
if (aLayersBackend != LayersBackend::LAYERS_WR &&
!data && aFormat == SurfaceFormat::B8G8R8X8 &&
moz2DBackend == gfx::BackendType::CAIRO &&
NS_IsMainThread()) {
data = DIBTextureData::Create(aSize, aFormat, aAllocator);
}
#endif
#ifdef MOZ_X11
gfxSurfaceType type =
gfxPlatform::GetPlatform()->ScreenReferenceSurface()->GetType();
if (!data && aLayersBackend == LayersBackend::LAYERS_BASIC &&
moz2DBackend == gfx::BackendType::CAIRO &&
type == gfxSurfaceType::Xlib)
{
data = X11TextureData::Create(aSize, aFormat, aTextureFlags, aAllocator);
}
#ifdef GL_PROVIDER_GLX
if (!data && aLayersBackend == LayersBackend::LAYERS_OPENGL &&
type == gfxSurfaceType::Xlib &&
aFormat != SurfaceFormat::A8 &&
gl::sGLXLibrary.UseTextureFromPixmap())
{
data = X11TextureData::Create(aSize, aFormat, aTextureFlags, aAllocator);
}
#endif
#endif
#ifdef XP_MACOSX
if (!data && gfxPrefs::UseIOSurfaceTextures()) {
data = MacIOSurfaceTextureData::Create(aSize, aFormat, moz2DBackend);
}
#endif
#ifdef MOZ_WIDGET_ANDROID
if (!data && gfxPrefs::UseSurfaceTextureTextures()) {
data = AndroidNativeWindowTextureData::Create(aSize, aFormat);
}
#endif
if (data) {
return MakeAndAddRef<TextureClient>(data, aTextureFlags, aAllocator);
}
// Can't do any better than a buffer texture client.
return TextureClient::CreateForRawBufferAccess(aAllocator, aFormat, aSize,
moz2DBackend, aLayersBackend,
aTextureFlags, aAllocFlags);
}
// static
already_AddRefed<TextureClient>
TextureClient::CreateFromSurface(KnowsCompositor* aAllocator,
gfx::SourceSurface* aSurface,
BackendSelector aSelector,
TextureFlags aTextureFlags,
TextureAllocationFlags aAllocFlags)
{
// also test the validity of aAllocator
if (!aAllocator || !aAllocator->GetTextureForwarder()->IPCOpen()) {
return nullptr;
}
gfx::IntSize size = aSurface->GetSize();
if (!gfx::Factory::AllowedSurfaceSize(size)) {
return nullptr;
}
TextureData* data = nullptr;
#if defined(XP_WIN)
LayersBackend layersBackend = aAllocator->GetCompositorBackendType();
gfx::BackendType moz2DBackend = BackendTypeForBackendSelector(layersBackend, aSelector);
int32_t maxTextureSize = aAllocator->GetMaxTextureSize();
if ((layersBackend == LayersBackend::LAYERS_D3D11 ||
layersBackend == LayersBackend::LAYERS_WR) &&
(moz2DBackend == gfx::BackendType::DIRECT2D ||
moz2DBackend == gfx::BackendType::DIRECT2D1_1 ||
(!!(aAllocFlags & ALLOC_FOR_OUT_OF_BAND_CONTENT) &&
DeviceManagerDx::Get()->GetContentDevice())) &&
size.width <= maxTextureSize &&
size.height <= maxTextureSize)
{
data = D3D11TextureData::Create(aSurface, aAllocFlags);
}
#endif
if (data) {
return MakeAndAddRef<TextureClient>(data, aTextureFlags, aAllocator->GetTextureForwarder());
}
// Fall back to using UpdateFromSurface
TextureAllocationFlags allocFlags = TextureAllocationFlags(aAllocFlags | ALLOC_UPDATE_FROM_SURFACE);
RefPtr<TextureClient> client = CreateForDrawing(aAllocator, aSurface->GetFormat(), size,
aSelector, aTextureFlags, allocFlags);
if (!client) {
return nullptr;
}
TextureClientAutoLock autoLock(client, OpenMode::OPEN_WRITE_ONLY);
if (!autoLock.Succeeded()) {
return nullptr;
}
client->UpdateFromSurface(aSurface);
return client.forget();
}
// static
already_AddRefed<TextureClient>
TextureClient::CreateForRawBufferAccess(KnowsCompositor* aAllocator,
gfx::SurfaceFormat aFormat,
gfx::IntSize aSize,
gfx::BackendType aMoz2DBackend,
TextureFlags aTextureFlags,
TextureAllocationFlags aAllocFlags)
{
return CreateForRawBufferAccess(aAllocator->GetTextureForwarder(),
aFormat, aSize, aMoz2DBackend,
aAllocator->GetCompositorBackendType(),
aTextureFlags, aAllocFlags);
}
// static
already_AddRefed<TextureClient>
TextureClient::CreateForRawBufferAccess(LayersIPCChannel* aAllocator,
gfx::SurfaceFormat aFormat,
gfx::IntSize aSize,
gfx::BackendType aMoz2DBackend,
LayersBackend aLayersBackend,
TextureFlags aTextureFlags,
TextureAllocationFlags aAllocFlags)
{
// also test the validity of aAllocator
if (!aAllocator || !aAllocator->IPCOpen()) {
return nullptr;
}
if (aAllocFlags & ALLOC_DISALLOW_BUFFERTEXTURECLIENT) {
return nullptr;
}
if (!gfx::Factory::AllowedSurfaceSize(aSize)) {
return nullptr;
}
if (aFormat == SurfaceFormat::B8G8R8X8) {
// Skia doesn't support RGBX, so ensure we clear the buffer for the proper alpha values.
aAllocFlags = TextureAllocationFlags(aAllocFlags | ALLOC_CLEAR_BUFFER);
}
// Note that we ignore the backend type if we get here. It should only be D2D
// or Skia, and D2D does not support data surfaces. Therefore it is safe to
// force the buffer to be Skia.
NS_WARNING_ASSERTION(aMoz2DBackend == gfx::BackendType::SKIA ||
aMoz2DBackend == gfx::BackendType::DIRECT2D ||
aMoz2DBackend == gfx::BackendType::DIRECT2D1_1,
"Unsupported TextureClient backend type");
TextureData* texData = BufferTextureData::Create(aSize, aFormat, gfx::BackendType::SKIA,
aLayersBackend, aTextureFlags,
aAllocFlags, aAllocator);
if (!texData) {
return nullptr;
}
return MakeAndAddRef<TextureClient>(texData, aTextureFlags, aAllocator);
}
// static
already_AddRefed<TextureClient>
TextureClient::CreateForYCbCr(KnowsCompositor* aAllocator,
gfx::IntSize aYSize,
uint32_t aYStride,
gfx::IntSize aCbCrSize,
uint32_t aCbCrStride,
StereoMode aStereoMode,
YUVColorSpace aYUVColorSpace,
uint32_t aBitDepth,
TextureFlags aTextureFlags)
{
if (!aAllocator || !aAllocator->GetLayersIPCActor()->IPCOpen()) {
return nullptr;
}
if (!gfx::Factory::AllowedSurfaceSize(aYSize)) {
return nullptr;
}
TextureData* data =
BufferTextureData::CreateForYCbCr(aAllocator,
aYSize, aYStride,
aCbCrSize, aCbCrStride,
aStereoMode, aYUVColorSpace,
aBitDepth, aTextureFlags);
if (!data) {
return nullptr;
}
return MakeAndAddRef<TextureClient>(data, aTextureFlags,
aAllocator->GetTextureForwarder());
}
// static
already_AddRefed<TextureClient>
TextureClient::CreateForYCbCrWithBufferSize(KnowsCompositor* aAllocator,
size_t aSize,
YUVColorSpace aYUVColorSpace,
uint32_t aBitDepth,
TextureFlags aTextureFlags)
{
if (!aAllocator || !aAllocator->GetLayersIPCActor()->IPCOpen()) {
return nullptr;
}
TextureData* data = BufferTextureData::CreateForYCbCrWithBufferSize(
aAllocator, aSize, aYUVColorSpace, aBitDepth, aTextureFlags);
if (!data) {
return nullptr;
}
return MakeAndAddRef<TextureClient>(data, aTextureFlags,
aAllocator->GetTextureForwarder());
}
TextureClient::TextureClient(TextureData* aData,
TextureFlags aFlags,
LayersIPCChannel* aAllocator)
: AtomicRefCountedWithFinalize("TextureClient")
, mAllocator(aAllocator)
, mActor(nullptr)
, mData(aData)
, mFlags(aFlags)
, mOpenMode(OpenMode::OPEN_NONE)
#ifdef DEBUG
, mExpectedDtRefs(0)
#endif
, mIsLocked(false)
, mIsReadLocked(false)
, mUpdated(false)
, mAddedToCompositableClient(false)
, mWorkaroundAnnoyingSharedSurfaceLifetimeIssues(false)
, mWorkaroundAnnoyingSharedSurfaceOwnershipIssues(false)
, mFwdTransactionId(0)
, mSerial(++sSerialCounter)
#ifdef GFX_DEBUG_TRACK_CLIENTS_IN_POOL
, mPoolTracker(nullptr)
#endif
{
mData->FillInfo(mInfo);
mFlags |= mData->GetTextureFlags();
if (mFlags & TextureFlags::NON_BLOCKING_READ_LOCK) {
MOZ_ASSERT(!(mFlags & TextureFlags::BLOCKING_READ_LOCK));
EnableReadLock();
} else if (mFlags & TextureFlags::BLOCKING_READ_LOCK) {
MOZ_ASSERT(!(mFlags & TextureFlags::NON_BLOCKING_READ_LOCK));
EnableBlockingReadLock();
}
}
bool TextureClient::CopyToTextureClient(TextureClient* aTarget,
const gfx::IntRect* aRect,
const gfx::IntPoint* aPoint)
{
MOZ_ASSERT(IsLocked());
MOZ_ASSERT(aTarget->IsLocked());
if (!aTarget->CanExposeDrawTarget() || !CanExposeDrawTarget()) {
return false;
}
RefPtr<DrawTarget> destinationTarget = aTarget->BorrowDrawTarget();
if (!destinationTarget) {
gfxWarning() << "TextureClient::CopyToTextureClient (dest) failed in BorrowDrawTarget";
return false;
}
RefPtr<DrawTarget> sourceTarget = BorrowDrawTarget();
if (!sourceTarget) {
gfxWarning() << "TextureClient::CopyToTextureClient (src) failed in BorrowDrawTarget";
return false;
}
RefPtr<gfx::SourceSurface> source = sourceTarget->Snapshot();
destinationTarget->CopySurface(source,
aRect ? *aRect : gfx::IntRect(gfx::IntPoint(0, 0), GetSize()),
aPoint ? *aPoint : gfx::IntPoint(0, 0));
return true;
}
already_AddRefed<gfx::DataSourceSurface>
TextureClient::GetAsSurface()
{
if (!Lock(OpenMode::OPEN_READ)) {
return nullptr;
}
RefPtr<gfx::DataSourceSurface> data;
{ // scope so that the DrawTarget is destroyed before Unlock()
RefPtr<gfx::DrawTarget> dt = BorrowDrawTarget();
if (dt) {
RefPtr<gfx::SourceSurface> surf = dt->Snapshot();
if (surf) {
data = surf->GetDataSurface();
}
}
}
Unlock();
return data.forget();
}
void
TextureClient::PrintInfo(std::stringstream& aStream, const char* aPrefix)
{
aStream << aPrefix;
aStream << nsPrintfCString("TextureClient (0x%p)", this).get();
AppendToString(aStream, GetSize(), " [size=", "]");
AppendToString(aStream, GetFormat(), " [format=", "]");
AppendToString(aStream, mFlags, " [flags=", "]");
#ifdef MOZ_DUMP_PAINTING
if (gfxPrefs::LayersDumpTexture()) {
nsAutoCString pfx(aPrefix);
pfx += " ";
aStream << "\n" << pfx.get() << "Surface: ";
RefPtr<gfx::DataSourceSurface> dSurf = GetAsSurface();
if (dSurf) {
aStream << gfxUtils::GetAsLZ4Base64Str(dSurf).get();
}
}
#endif
}
void
TextureClient::GPUVideoDesc(SurfaceDescriptorGPUVideo* const aOutDesc)
{
const auto handle = GetSerial();
GPUVideoSubDescriptor subDesc = null_t();
MOZ_RELEASE_ASSERT(mData);
mData->GetSubDescriptor(&subDesc);
*aOutDesc = SurfaceDescriptorGPUVideo(handle, Move(subDesc));
}
class MemoryTextureReadLock : public NonBlockingTextureReadLock {
public:
MemoryTextureReadLock();
~MemoryTextureReadLock();
virtual bool ReadLock() override;
virtual int32_t ReadUnlock() override;
virtual int32_t GetReadCount() override;
virtual LockType GetType() override { return TYPE_NONBLOCKING_MEMORY; }
virtual bool IsValid() const override { return true; };
virtual bool Serialize(ReadLockDescriptor& aOutput, base::ProcessId aOther) override;
int32_t mReadCount;
};
// The cross-prcess implementation of TextureReadLock.
//
// Since we don't use cross-process reference counting for the ReadLock objects,
// we use the lock's internal counter as a way to know when to deallocate the
// underlying shmem section: when the counter is equal to 1, it means that the
// lock is not "held" (the texture is writable), when the counter is equal to 0
// it means that we can safely deallocate the shmem section without causing a race
// condition with the other process.
class ShmemTextureReadLock : public NonBlockingTextureReadLock {
public:
struct ShmReadLockInfo {
int32_t readCount;
};
explicit ShmemTextureReadLock(LayersIPCChannel* aAllocator);
~ShmemTextureReadLock();
virtual bool ReadLock() override;
virtual int32_t ReadUnlock() override;
virtual int32_t GetReadCount() override;
virtual bool IsValid() const override { return mAllocSuccess; };
virtual LockType GetType() override { return TYPE_NONBLOCKING_SHMEM; }
virtual bool Serialize(ReadLockDescriptor& aOutput, base::ProcessId aOther) override;
mozilla::layers::ShmemSection& GetShmemSection() { return mShmemSection; }
explicit ShmemTextureReadLock(const mozilla::layers::ShmemSection& aShmemSection)
: mShmemSection(aShmemSection)
, mAllocSuccess(true)
{
MOZ_COUNT_CTOR(ShmemTextureReadLock);
}
ShmReadLockInfo* GetShmReadLockInfoPtr()
{
return reinterpret_cast<ShmReadLockInfo*>
(mShmemSection.shmem().get<char>() + mShmemSection.offset());
}
RefPtr<LayersIPCChannel> mClientAllocator;
mozilla::layers::ShmemSection mShmemSection;
bool mAllocSuccess;
};
class CrossProcessSemaphoreReadLock : public TextureReadLock
{
public:
CrossProcessSemaphoreReadLock()
: mSemaphore(CrossProcessSemaphore::Create("TextureReadLock", 1))
, mShared(false)
{}
explicit CrossProcessSemaphoreReadLock(CrossProcessSemaphoreHandle aHandle)
: mSemaphore(CrossProcessSemaphore::Create(aHandle))
, mShared(false)
{}
virtual bool ReadLock() override
{
if (!IsValid()) {
return false;
}
return mSemaphore->Wait();
}
virtual bool TryReadLock(TimeDuration aTimeout) override
{
if (!IsValid()) {
return false;
}
return mSemaphore->Wait(Some(aTimeout));
}
virtual int32_t ReadUnlock() override
{
if (!IsValid()) {
return 1;
}
mSemaphore->Signal();
return 1;
}
virtual bool IsValid() const override { return !!mSemaphore; }
virtual bool Serialize(ReadLockDescriptor& aOutput, base::ProcessId aOther) override;
virtual LockType GetType() override { return TYPE_CROSS_PROCESS_SEMAPHORE; }
UniquePtr<CrossProcessSemaphore> mSemaphore;
bool mShared;
};
// static
already_AddRefed<TextureReadLock>
TextureReadLock::Deserialize(const ReadLockDescriptor& aDescriptor, ISurfaceAllocator* aAllocator)
{
switch (aDescriptor.type()) {
case ReadLockDescriptor::TShmemSection: {
const ShmemSection& section = aDescriptor.get_ShmemSection();
MOZ_RELEASE_ASSERT(section.shmem().IsReadable());
return MakeAndAddRef<ShmemTextureReadLock>(section);
}
case ReadLockDescriptor::Tuintptr_t: {
if (!aAllocator->IsSameProcess()) {
// Trying to use a memory based lock instead of a shmem based one in
// the cross-process case is a bad security violation.
NS_ERROR("A client process may be trying to peek at the host's address space!");
return nullptr;
}
RefPtr<TextureReadLock> lock = reinterpret_cast<MemoryTextureReadLock*>(
aDescriptor.get_uintptr_t()
);
MOZ_ASSERT(lock);
if (lock) {
// The corresponding AddRef is in MemoryTextureReadLock::Serialize
lock.get()->Release();
}
return lock.forget();
}
case ReadLockDescriptor::TCrossProcessSemaphoreDescriptor: {
return MakeAndAddRef<CrossProcessSemaphoreReadLock>(aDescriptor.get_CrossProcessSemaphoreDescriptor().sem());
}
case ReadLockDescriptor::Tnull_t: {
return nullptr;
}
default: {
// Invalid descriptor.
MOZ_DIAGNOSTIC_ASSERT(false);
}
}
return nullptr;
}
// static
already_AddRefed<TextureReadLock>
NonBlockingTextureReadLock::Create(LayersIPCChannel* aAllocator)
{
if (aAllocator->IsSameProcess()) {
// If our compositor is in the same process, we can save some cycles by not
// using shared memory.
return MakeAndAddRef<MemoryTextureReadLock>();
}
return MakeAndAddRef<ShmemTextureReadLock>(aAllocator);
}
MemoryTextureReadLock::MemoryTextureReadLock()
: mReadCount(1)
{
MOZ_COUNT_CTOR(MemoryTextureReadLock);
}
MemoryTextureReadLock::~MemoryTextureReadLock()
{
// One read count that is added in constructor.
MOZ_ASSERT(mReadCount == 1);
MOZ_COUNT_DTOR(MemoryTextureReadLock);
}
bool
MemoryTextureReadLock::Serialize(ReadLockDescriptor& aOutput, base::ProcessId aOther)
{
// AddRef here and Release when receiving on the host side to make sure the
// reference count doesn't go to zero before the host receives the message.
// see TextureReadLock::Deserialize
this->AddRef();
aOutput = ReadLockDescriptor(uintptr_t(this));
return true;
}
bool
MemoryTextureReadLock::ReadLock()
{
NS_ASSERT_OWNINGTHREAD(MemoryTextureReadLock);
PR_ATOMIC_INCREMENT(&mReadCount);
return true;
}
int32_t
MemoryTextureReadLock::ReadUnlock()
{
int32_t readCount = PR_ATOMIC_DECREMENT(&mReadCount);
MOZ_ASSERT(readCount >= 0);
return readCount;
}
int32_t
MemoryTextureReadLock::GetReadCount()
{
NS_ASSERT_OWNINGTHREAD(MemoryTextureReadLock);
return mReadCount;
}
ShmemTextureReadLock::ShmemTextureReadLock(LayersIPCChannel* aAllocator)
: mClientAllocator(aAllocator)
, mAllocSuccess(false)
{
MOZ_COUNT_CTOR(ShmemTextureReadLock);
MOZ_ASSERT(mClientAllocator);
MOZ_ASSERT(mClientAllocator->GetTileLockAllocator());
#define MOZ_ALIGN_WORD(x) (((x) + 3) & ~3)
if (mClientAllocator->GetTileLockAllocator()->AllocShmemSection(
MOZ_ALIGN_WORD(sizeof(ShmReadLockInfo)), &mShmemSection)) {
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
info->readCount = 1;
mAllocSuccess = true;
}
}
ShmemTextureReadLock::~ShmemTextureReadLock()
{
if (mClientAllocator) {
// Release one read count that is added in constructor.
// The count is kept for calling GetReadCount() by TextureClientPool.
ReadUnlock();
}
MOZ_COUNT_DTOR(ShmemTextureReadLock);
}
bool
ShmemTextureReadLock::Serialize(ReadLockDescriptor& aOutput, base::ProcessId aOther)
{
aOutput = ReadLockDescriptor(GetShmemSection());
return true;
}
bool
ShmemTextureReadLock::ReadLock() {
NS_ASSERT_OWNINGTHREAD(ShmemTextureReadLock);
if (!mAllocSuccess) {
return false;
}
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
PR_ATOMIC_INCREMENT(&info->readCount);
return true;
}
int32_t
ShmemTextureReadLock::ReadUnlock() {
if (!mAllocSuccess) {
return 0;
}
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
int32_t readCount = PR_ATOMIC_DECREMENT(&info->readCount);
MOZ_ASSERT(readCount >= 0);
if (readCount <= 0) {
if (mClientAllocator && mClientAllocator->GetTileLockAllocator()) {
mClientAllocator->GetTileLockAllocator()->DeallocShmemSection(mShmemSection);
} else {
// we are on the compositor process, or IPC is down.
FixedSizeSmallShmemSectionAllocator::FreeShmemSection(mShmemSection);
}
}
return readCount;
}
int32_t
ShmemTextureReadLock::GetReadCount() {
NS_ASSERT_OWNINGTHREAD(ShmemTextureReadLock);
if (!mAllocSuccess) {
return 0;
}
ShmReadLockInfo* info = GetShmReadLockInfoPtr();
return info->readCount;
}
bool
CrossProcessSemaphoreReadLock::Serialize(ReadLockDescriptor& aOutput, base::ProcessId aOther)
{
if (!mShared && IsValid()) {
aOutput = ReadLockDescriptor(CrossProcessSemaphoreDescriptor(mSemaphore->ShareToProcess(aOther)));
mSemaphore->CloseHandle();
mShared = true;
return true;
} else {
return mShared;
}
}
void
TextureClient::EnableBlockingReadLock()
{
if (!mReadLock) {
mReadLock = new CrossProcessSemaphoreReadLock();
}
}
void
TextureClient::AddPaintThreadRef()
{
MOZ_ASSERT(NS_IsMainThread());
mPaintThreadRefs += 1;
}
void
TextureClient::DropPaintThreadRef()
{
MOZ_RELEASE_ASSERT(PaintThread::IsOnPaintThread());
MOZ_RELEASE_ASSERT(mPaintThreadRefs >= 1);
mPaintThreadRefs -= 1;
}
bool
UpdateYCbCrTextureClient(TextureClient* aTexture, const PlanarYCbCrData& aData)
{
MOZ_ASSERT(aTexture);
MOZ_ASSERT(aTexture->IsLocked());
MOZ_ASSERT(aTexture->GetFormat() == gfx::SurfaceFormat::YUV, "This textureClient can only use YCbCr data");
MOZ_ASSERT(!aTexture->IsImmutable());
MOZ_ASSERT(aTexture->IsValid());
MOZ_ASSERT(aData.mCbSkip == aData.mCrSkip);
MappedYCbCrTextureData mapped;
if (!aTexture->BorrowMappedYCbCrData(mapped)) {
NS_WARNING("Failed to extract YCbCr info!");
return false;
}
MappedYCbCrTextureData srcData;
srcData.y.data = aData.mYChannel;
srcData.y.size = aData.mYSize;
srcData.y.stride = aData.mYStride;
srcData.y.skip = aData.mYSkip;
MOZ_ASSERT(aData.mBitDepth == 8 || (aData.mBitDepth > 8 && aData.mBitDepth <= 16));
srcData.y.bytesPerPixel = (aData.mBitDepth > 8) ? 2 : 1;
srcData.cb.data = aData.mCbChannel;
srcData.cb.size = aData.mCbCrSize;
srcData.cb.stride = aData.mCbCrStride;
srcData.cb.skip = aData.mCbSkip;
srcData.cb.bytesPerPixel = (aData.mBitDepth > 8) ? 2 : 1;
srcData.cr.data = aData.mCrChannel;
srcData.cr.size = aData.mCbCrSize;
srcData.cr.stride = aData.mCbCrStride;
srcData.cr.skip = aData.mCrSkip;
srcData.cr.bytesPerPixel = (aData.mBitDepth > 8) ? 2 : 1;
srcData.metadata = nullptr;
if (!srcData.CopyInto(mapped)) {
NS_WARNING("Failed to copy image data!");
return false;
}
if (TextureRequiresLocking(aTexture->GetFlags())) {
// We don't have support for proper locking yet, so we'll
// have to be immutable instead.
aTexture->MarkImmutable();
}
return true;
}
already_AddRefed<TextureClient>
TextureClient::CreateWithData(TextureData* aData, TextureFlags aFlags, LayersIPCChannel* aAllocator)
{
if (!aData) {
return nullptr;
}
return MakeAndAddRef<TextureClient>(aData, aFlags, aAllocator);
}
template<class PixelDataType>
static void
copyData(PixelDataType* aDst,
const MappedYCbCrChannelData& aChannelDst,
PixelDataType* aSrc,
const MappedYCbCrChannelData& aChannelSrc)
{
uint8_t* srcByte = reinterpret_cast<uint8_t*>(aSrc);
const int32_t srcSkip = aChannelSrc.skip + 1;
uint8_t* dstByte = reinterpret_cast<uint8_t*>(aDst);
const int32_t dstSkip = aChannelDst.skip + 1;
for (int32_t i = 0; i < aChannelSrc.size.height; ++i) {
for (int32_t j = 0; j < aChannelSrc.size.width; ++j) {
*aDst = *aSrc;
aSrc += srcSkip;
aDst += dstSkip;
}
srcByte += aChannelSrc.stride;
aSrc = reinterpret_cast<PixelDataType*>(srcByte);
dstByte += aChannelDst.stride;
aDst = reinterpret_cast<PixelDataType*>(dstByte);
}
}
bool
MappedYCbCrChannelData::CopyInto(MappedYCbCrChannelData& aDst)
{
if (!data || !aDst.data || size != aDst.size) {
return false;
}
if (stride == aDst.stride && skip == aDst.skip) {
// fast path!
// We assume that the padding in the destination is there for alignment
// purposes and doesn't contain useful data.
memcpy(aDst.data, data, stride * size.height);
return true;
}
if (aDst.skip == 0 && skip == 0) {
// fast-ish path
for (int32_t i = 0; i < size.height; ++i) {
memcpy(aDst.data + i * aDst.stride,
data + i * stride,
size.width * bytesPerPixel);
}
return true;
}
MOZ_ASSERT(bytesPerPixel == 1 || bytesPerPixel == 2);
// slow path
if (bytesPerPixel == 1) {
copyData(aDst.data, aDst, data, *this);
} else if (bytesPerPixel == 2) {
if (skip != 0) {
// The skip value definition doesn't specify if it's in bytes, or in
// "pixels". We will assume the later. There are currently no decoders
// returning HDR content with a skip value different than zero anyway.
NS_WARNING("skip value non zero for HDR content, please verify code "
"(see bug 1421187)");
}
copyData(reinterpret_cast<uint16_t*>(aDst.data),
aDst,
reinterpret_cast<uint16_t*>(data),
*this);
}
return true;
}
} // namespace layers
} // namespace mozilla
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