Files
tubestation/gfx/layers/client/ClientLayerManager.cpp
Bas Schouten 0ca40e581f Bug 1088414: Use a single synchronization texture for D3D11. r=jrmuizel
This patch adds a cross platform 'sync object' that is used to synchronize the drawing of individual textures. For the D3D11 implementation all textures that are written to will have one pixel copied into the D3D11 sync texture while holding its lock. The compositor will then, before composition acquire and release sync once, this should ensure all drawing on the content side has completed.
2014-12-13 01:50:47 +00:00

777 lines
23 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 "ClientLayerManager.h"
#include "GeckoProfiler.h" // for PROFILER_LABEL
#include "gfxPrefs.h" // for gfxPrefs::LayersTile...
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
#include "mozilla/Hal.h"
#include "mozilla/dom/ScreenOrientation.h" // for ScreenOrientation
#include "mozilla/dom/TabChild.h" // for TabChild
#include "mozilla/hal_sandbox/PHal.h" // for ScreenConfiguration
#include "mozilla/layers/CompositableClient.h"
#include "mozilla/layers/CompositorChild.h" // for CompositorChild
#include "mozilla/layers/ContentClient.h"
#include "mozilla/layers/ISurfaceAllocator.h"
#include "mozilla/layers/LayersMessages.h" // for EditReply, etc
#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor
#include "mozilla/layers/PLayerChild.h" // for PLayerChild
#include "mozilla/layers/LayerTransactionChild.h"
#include "mozilla/layers/TextureClientPool.h" // for TextureClientPool
#include "ClientReadbackLayer.h" // for ClientReadbackLayer
#include "nsAString.h"
#include "nsIWidget.h" // for nsIWidget
#include "nsIWidgetListener.h"
#include "nsTArray.h" // for AutoInfallibleTArray
#include "nsXULAppAPI.h" // for XRE_GetProcessType, etc
#include "TiledLayerBuffer.h"
#include "mozilla/dom/WindowBinding.h" // for Overfill Callback
#include "FrameLayerBuilder.h" // for FrameLayerbuilder
#include "gfxPrefs.h"
#ifdef MOZ_WIDGET_ANDROID
#include "AndroidBridge.h"
#include "LayerMetricsWrapper.h"
#endif
namespace mozilla {
namespace layers {
using namespace mozilla::gfx;
void
ClientLayerManager::MemoryPressureObserver::Destroy()
{
UnregisterMemoryPressureEvent();
mClientLayerManager = nullptr;
}
NS_IMETHODIMP
ClientLayerManager::MemoryPressureObserver::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aSomeData)
{
if (!mClientLayerManager || strcmp(aTopic, "memory-pressure")) {
return NS_OK;
}
mClientLayerManager->HandleMemoryPressure();
return NS_OK;
}
void
ClientLayerManager::MemoryPressureObserver::RegisterMemoryPressureEvent()
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
MOZ_ASSERT(observerService);
if (observerService) {
observerService->AddObserver(this, "memory-pressure", false);
}
}
void
ClientLayerManager::MemoryPressureObserver::UnregisterMemoryPressureEvent()
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(this, "memory-pressure");
}
}
NS_IMPL_ISUPPORTS(ClientLayerManager::MemoryPressureObserver, nsIObserver)
ClientLayerManager::ClientLayerManager(nsIWidget* aWidget)
: mPhase(PHASE_NONE)
, mWidget(aWidget)
, mLatestTransactionId(0)
, mTargetRotation(ROTATION_0)
, mRepeatTransaction(false)
, mIsRepeatTransaction(false)
, mTransactionIncomplete(false)
, mCompositorMightResample(false)
, mNeedsComposite(false)
, mPaintSequenceNumber(0)
, mForwarder(new ShadowLayerForwarder)
{
MOZ_COUNT_CTOR(ClientLayerManager);
mMemoryPressureObserver = new MemoryPressureObserver(this);
}
ClientLayerManager::~ClientLayerManager()
{
if (mTransactionIdAllocator) {
DidComposite(mLatestTransactionId);
}
mMemoryPressureObserver->Destroy();
ClearCachedResources();
// Stop receiveing AsyncParentMessage at Forwarder.
// After the call, the message is directly handled by LayerTransactionChild.
// Basically this function should be called in ShadowLayerForwarder's
// destructor. But when the destructor is triggered by
// CompositorChild::Destroy(), the destructor can not handle it correctly.
// See Bug 1000525.
mForwarder->StopReceiveAsyncParentMessge();
mRoot = nullptr;
MOZ_COUNT_DTOR(ClientLayerManager);
}
int32_t
ClientLayerManager::GetMaxTextureSize() const
{
return mForwarder->GetMaxTextureSize();
}
void
ClientLayerManager::SetDefaultTargetConfiguration(BufferMode aDoubleBuffering,
ScreenRotation aRotation)
{
mTargetRotation = aRotation;
}
void
ClientLayerManager::SetRoot(Layer* aLayer)
{
if (mRoot != aLayer) {
// Have to hold the old root and its children in order to
// maintain the same view of the layer tree in this process as
// the parent sees. Otherwise layers can be destroyed
// mid-transaction and bad things can happen (v. bug 612573)
if (mRoot) {
Hold(mRoot);
}
mForwarder->SetRoot(Hold(aLayer));
NS_ASSERTION(aLayer, "Root can't be null");
NS_ASSERTION(aLayer->Manager() == this, "Wrong manager");
NS_ASSERTION(InConstruction(), "Only allowed in construction phase");
mRoot = aLayer;
}
}
void
ClientLayerManager::Mutated(Layer* aLayer)
{
LayerManager::Mutated(aLayer);
NS_ASSERTION(InConstruction() || InDrawing(), "wrong phase");
mForwarder->Mutated(Hold(aLayer));
}
already_AddRefed<ReadbackLayer>
ClientLayerManager::CreateReadbackLayer()
{
nsRefPtr<ReadbackLayer> layer = new ClientReadbackLayer(this);
return layer.forget();
}
void
ClientLayerManager::BeginTransactionWithTarget(gfxContext* aTarget)
{
mInTransaction = true;
mTransactionStart = TimeStamp::Now();
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG(("[----- BeginTransaction"));
Log();
#endif
NS_ASSERTION(!InTransaction(), "Nested transactions not allowed");
mPhase = PHASE_CONSTRUCTION;
NS_ABORT_IF_FALSE(mKeepAlive.IsEmpty(), "uncommitted txn?");
nsRefPtr<gfxContext> targetContext = aTarget;
// If the last transaction was incomplete (a failed DoEmptyTransaction),
// don't signal a new transaction to ShadowLayerForwarder. Carry on adding
// to the previous transaction.
dom::ScreenOrientation orientation;
if (dom::TabChild* window = mWidget->GetOwningTabChild()) {
orientation = window->GetOrientation();
} else {
hal::ScreenConfiguration currentConfig;
hal::GetCurrentScreenConfiguration(&currentConfig);
orientation = currentConfig.orientation();
}
nsIntRect targetBounds = mWidget->GetNaturalBounds();
targetBounds.x = targetBounds.y = 0;
mForwarder->BeginTransaction(targetBounds, mTargetRotation, orientation);
// If we're drawing on behalf of a context with async pan/zoom
// enabled, then the entire buffer of painted layers might be
// composited (including resampling) asynchronously before we get
// a chance to repaint, so we have to ensure that it's all valid
// and not rotated.
if (mWidget) {
if (dom::TabChild* window = mWidget->GetOwningTabChild()) {
mCompositorMightResample = window->IsAsyncPanZoomEnabled();
}
}
// If we have a non-default target, we need to let our shadow manager draw
// to it. This will happen at the end of the transaction.
if (aTarget && XRE_GetProcessType() == GeckoProcessType_Default) {
mShadowTarget = aTarget;
} else {
NS_ASSERTION(!aTarget,
"Content-process ClientLayerManager::BeginTransactionWithTarget not supported");
}
// If this is a new paint, increment the paint sequence number.
if (!mIsRepeatTransaction && gfxPrefs::APZTestLoggingEnabled()) {
++mPaintSequenceNumber;
mApzTestData.StartNewPaint(mPaintSequenceNumber);
}
}
void
ClientLayerManager::BeginTransaction()
{
BeginTransactionWithTarget(nullptr);
}
bool
ClientLayerManager::EndTransactionInternal(DrawPaintedLayerCallback aCallback,
void* aCallbackData,
EndTransactionFlags)
{
PROFILER_LABEL("ClientLayerManager", "EndTransactionInternal",
js::ProfileEntry::Category::GRAPHICS);
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG((" ----- (beginning paint)"));
Log();
#endif
profiler_tracing("Paint", "Rasterize", TRACING_INTERVAL_START);
NS_ASSERTION(InConstruction(), "Should be in construction phase");
mPhase = PHASE_DRAWING;
ClientLayer* root = ClientLayer::ToClientLayer(GetRoot());
mTransactionIncomplete = false;
// Apply pending tree updates before recomputing effective
// properties.
GetRoot()->ApplyPendingUpdatesToSubtree();
mPaintedLayerCallback = aCallback;
mPaintedLayerCallbackData = aCallbackData;
GetRoot()->ComputeEffectiveTransforms(Matrix4x4());
root->RenderLayer();
if (!mRepeatTransaction && !GetRoot()->GetInvalidRegion().IsEmpty()) {
GetRoot()->Mutated();
}
mPaintedLayerCallback = nullptr;
mPaintedLayerCallbackData = nullptr;
// Go back to the construction phase if the transaction isn't complete.
// Layout will update the layer tree and call EndTransaction().
mPhase = mTransactionIncomplete ? PHASE_CONSTRUCTION : PHASE_NONE;
NS_ASSERTION(!aCallback || !mTransactionIncomplete,
"If callback is not null, transaction must be complete");
if (gfxPlatform::GetPlatform()->DidRenderingDeviceReset()) {
FrameLayerBuilder::InvalidateAllLayers(this);
}
return !mTransactionIncomplete;
}
void
ClientLayerManager::EndTransaction(DrawPaintedLayerCallback aCallback,
void* aCallbackData,
EndTransactionFlags aFlags)
{
if (mWidget) {
mWidget->PrepareWindowEffects();
}
EndTransactionInternal(aCallback, aCallbackData, aFlags);
ForwardTransaction(!(aFlags & END_NO_REMOTE_COMPOSITE));
if (mRepeatTransaction) {
mRepeatTransaction = false;
mIsRepeatTransaction = true;
BeginTransaction();
ClientLayerManager::EndTransaction(aCallback, aCallbackData, aFlags);
mIsRepeatTransaction = false;
} else {
MakeSnapshotIfRequired();
}
for (size_t i = 0; i < mTexturePools.Length(); i++) {
mTexturePools[i]->ReturnDeferredClients();
}
mInTransaction = false;
mTransactionStart = TimeStamp();
}
bool
ClientLayerManager::EndEmptyTransaction(EndTransactionFlags aFlags)
{
mInTransaction = false;
if (!mRoot) {
return false;
}
if (!EndTransactionInternal(nullptr, nullptr, aFlags)) {
// Return without calling ForwardTransaction. This leaves the
// ShadowLayerForwarder transaction open; the following
// EndTransaction will complete it.
return false;
}
if (mWidget) {
mWidget->PrepareWindowEffects();
}
ForwardTransaction(!(aFlags & END_NO_REMOTE_COMPOSITE));
MakeSnapshotIfRequired();
return true;
}
CompositorChild *
ClientLayerManager::GetRemoteRenderer()
{
if (!mWidget) {
return nullptr;
}
return mWidget->GetRemoteRenderer();
}
CompositorChild*
ClientLayerManager::GetCompositorChild()
{
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return CompositorChild::Get();
}
return GetRemoteRenderer();
}
void
ClientLayerManager::Composite()
{
mForwarder->Composite();
}
void
ClientLayerManager::DidComposite(uint64_t aTransactionId)
{
MOZ_ASSERT(mWidget);
nsIWidgetListener *listener = mWidget->GetWidgetListener();
if (listener) {
listener->DidCompositeWindow();
}
listener = mWidget->GetAttachedWidgetListener();
if (listener) {
listener->DidCompositeWindow();
}
mTransactionIdAllocator->NotifyTransactionCompleted(aTransactionId);
}
void
ClientLayerManager::GetCompositorSideAPZTestData(APZTestData* aData) const
{
if (mForwarder->HasShadowManager()) {
if (!mForwarder->GetShadowManager()->SendGetAPZTestData(aData)) {
NS_WARNING("Call to PLayerTransactionChild::SendGetAPZTestData() failed");
}
}
}
float
ClientLayerManager::RequestProperty(const nsAString& aProperty)
{
if (mForwarder->HasShadowManager()) {
float value;
if (!mForwarder->GetShadowManager()->SendRequestProperty(nsString(aProperty), &value)) {
NS_WARNING("Call to PLayerTransactionChild::SendGetAPZTestData() failed");
}
return value;
}
return -1;
}
void
ClientLayerManager::StartNewRepaintRequest(SequenceNumber aSequenceNumber)
{
if (gfxPrefs::APZTestLoggingEnabled()) {
mApzTestData.StartNewRepaintRequest(aSequenceNumber);
}
}
bool
ClientLayerManager::RequestOverfill(mozilla::dom::OverfillCallback* aCallback)
{
MOZ_ASSERT(aCallback != nullptr);
MOZ_ASSERT(HasShadowManager(), "Request Overfill only supported on b2g for now");
if (HasShadowManager()) {
CompositorChild* child = GetRemoteRenderer();
NS_ASSERTION(child, "Could not get CompositorChild");
child->AddOverfillObserver(this);
child->SendRequestOverfill();
mOverfillCallbacks.AppendElement(aCallback);
}
return true;
}
void
ClientLayerManager::RunOverfillCallback(const uint32_t aOverfill)
{
for (size_t i = 0; i < mOverfillCallbacks.Length(); i++) {
ErrorResult error;
mOverfillCallbacks[i]->Call(aOverfill, error);
}
mOverfillCallbacks.Clear();
}
void
ClientLayerManager::MakeSnapshotIfRequired()
{
if (!mShadowTarget) {
return;
}
if (mWidget) {
if (CompositorChild* remoteRenderer = GetRemoteRenderer()) {
// The compositor doesn't draw to a different sized surface
// when there's a rotation. Instead we rotate the result
// when drawing into dt
nsIntRect outerBounds;
mWidget->GetBounds(outerBounds);
nsIntRect bounds = ToOutsideIntRect(mShadowTarget->GetClipExtents());
if (mTargetRotation) {
bounds = RotateRect(bounds, outerBounds, mTargetRotation);
}
SurfaceDescriptor inSnapshot;
if (!bounds.IsEmpty() &&
mForwarder->AllocSurfaceDescriptor(bounds.Size().ToIntSize(),
gfxContentType::COLOR_ALPHA,
&inSnapshot) &&
remoteRenderer->SendMakeSnapshot(inSnapshot, bounds)) {
RefPtr<DataSourceSurface> surf = GetSurfaceForDescriptor(inSnapshot);
DrawTarget* dt = mShadowTarget->GetDrawTarget();
Rect dstRect(bounds.x, bounds.y, bounds.width, bounds.height);
Rect srcRect(0, 0, bounds.width, bounds.height);
gfx::Matrix rotate = ComputeTransformForUnRotation(outerBounds, mTargetRotation);
gfx::Matrix oldMatrix = dt->GetTransform();
dt->SetTransform(oldMatrix * rotate);
dt->DrawSurface(surf, dstRect, srcRect,
DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_OVER));
dt->SetTransform(oldMatrix);
}
mForwarder->DestroySharedSurface(&inSnapshot);
}
}
mShadowTarget = nullptr;
}
void
ClientLayerManager::FlushRendering()
{
if (mWidget) {
if (CompositorChild* remoteRenderer = mWidget->GetRemoteRenderer()) {
remoteRenderer->SendFlushRendering();
}
}
}
void
ClientLayerManager::SendInvalidRegion(const nsIntRegion& aRegion)
{
if (mWidget) {
if (CompositorChild* remoteRenderer = mWidget->GetRemoteRenderer()) {
remoteRenderer->SendNotifyRegionInvalidated(aRegion);
}
}
}
uint32_t
ClientLayerManager::StartFrameTimeRecording(int32_t aBufferSize)
{
CompositorChild* renderer = GetRemoteRenderer();
if (renderer) {
uint32_t startIndex;
renderer->SendStartFrameTimeRecording(aBufferSize, &startIndex);
return startIndex;
}
return -1;
}
void
ClientLayerManager::StopFrameTimeRecording(uint32_t aStartIndex,
nsTArray<float>& aFrameIntervals)
{
CompositorChild* renderer = GetRemoteRenderer();
if (renderer) {
renderer->SendStopFrameTimeRecording(aStartIndex, &aFrameIntervals);
}
}
void
ClientLayerManager::ForwardTransaction(bool aScheduleComposite)
{
if (mForwarder->GetSyncObject()) {
mForwarder->GetSyncObject()->FinalizeFrame();
}
mPhase = PHASE_FORWARD;
mLatestTransactionId = mTransactionIdAllocator->GetTransactionId();
TimeStamp transactionStart;
if (!mTransactionIdAllocator->GetTransactionStart().IsNull()) {
transactionStart = mTransactionIdAllocator->GetTransactionStart();
} else {
transactionStart = mTransactionStart;
}
// forward this transaction's changeset to our LayerManagerComposite
bool sent;
AutoInfallibleTArray<EditReply, 10> replies;
if (mForwarder->EndTransaction(&replies, mRegionToClear,
mLatestTransactionId, aScheduleComposite, mPaintSequenceNumber,
mIsRepeatTransaction, transactionStart, &sent)) {
for (nsTArray<EditReply>::size_type i = 0; i < replies.Length(); ++i) {
const EditReply& reply = replies[i];
switch (reply.type()) {
case EditReply::TOpContentBufferSwap: {
MOZ_LAYERS_LOG(("[LayersForwarder] DoubleBufferSwap"));
const OpContentBufferSwap& obs = reply.get_OpContentBufferSwap();
CompositableClient* compositable =
CompositableClient::FromIPDLActor(obs.compositableChild());
ContentClientRemote* contentClient =
static_cast<ContentClientRemote*>(compositable);
MOZ_ASSERT(contentClient);
contentClient->SwapBuffers(obs.frontUpdatedRegion());
break;
}
case EditReply::TOpTextureSwap: {
MOZ_LAYERS_LOG(("[LayersForwarder] TextureSwap"));
const OpTextureSwap& ots = reply.get_OpTextureSwap();
CompositableClient* compositable =
CompositableClient::FromIPDLActor(ots.compositableChild());
MOZ_ASSERT(compositable);
compositable->SetDescriptorFromReply(ots.textureId(), ots.image());
break;
}
case EditReply::TReturnReleaseFence: {
const ReturnReleaseFence& rep = reply.get_ReturnReleaseFence();
FenceHandle fence = rep.fence();
PTextureChild* child = rep.textureChild();
if (!fence.IsValid() || !child) {
break;
}
RefPtr<TextureClient> texture = TextureClient::AsTextureClient(child);
if (texture) {
texture->SetReleaseFenceHandle(fence);
}
break;
}
default:
NS_RUNTIMEABORT("not reached");
}
}
if (sent) {
mNeedsComposite = false;
}
} else if (HasShadowManager()) {
NS_WARNING("failed to forward Layers transaction");
}
if (!sent) {
// Clear the transaction id so that it doesn't get returned
// unless we forwarded to somewhere that doesn't actually
// have a compositor.
mTransactionIdAllocator->RevokeTransactionId(mLatestTransactionId);
}
mForwarder->RemoveTexturesIfNecessary();
mForwarder->SendPendingAsyncMessges();
mPhase = PHASE_NONE;
// this may result in Layers being deleted, which results in
// PLayer::Send__delete__() and DeallocShmem()
mKeepAlive.Clear();
}
ShadowableLayer*
ClientLayerManager::Hold(Layer* aLayer)
{
NS_ABORT_IF_FALSE(HasShadowManager(),
"top-level tree, no shadow tree to remote to");
ShadowableLayer* shadowable = ClientLayer::ToClientLayer(aLayer);
NS_ABORT_IF_FALSE(shadowable, "trying to remote an unshadowable layer");
mKeepAlive.AppendElement(aLayer);
return shadowable;
}
bool
ClientLayerManager::IsCompositingCheap()
{
// Whether compositing is cheap depends on the parent backend.
return mForwarder->mShadowManager &&
LayerManager::IsCompositingCheap(mForwarder->GetCompositorBackendType());
}
bool
ClientLayerManager::AreComponentAlphaLayersEnabled()
{
return GetCompositorBackendType() != LayersBackend::LAYERS_BASIC &&
LayerManager::AreComponentAlphaLayersEnabled();
}
void
ClientLayerManager::SetIsFirstPaint()
{
mForwarder->SetIsFirstPaint();
}
TextureClientPool*
ClientLayerManager::GetTexturePool(SurfaceFormat aFormat)
{
for (size_t i = 0; i < mTexturePools.Length(); i++) {
if (mTexturePools[i]->GetFormat() == aFormat) {
return mTexturePools[i];
}
}
mTexturePools.AppendElement(
new TextureClientPool(aFormat, IntSize(gfxPlatform::GetPlatform()->GetTileWidth(),
gfxPlatform::GetPlatform()->GetTileHeight()),
gfxPrefs::LayersTileMaxPoolSize(),
gfxPrefs::LayersTileShrinkPoolTimeout(),
mForwarder));
return mTexturePools.LastElement();
}
void
ClientLayerManager::ReturnTextureClientDeferred(TextureClient& aClient) {
GetTexturePool(aClient.GetFormat())->ReturnTextureClientDeferred(&aClient);
}
void
ClientLayerManager::ReturnTextureClient(TextureClient& aClient) {
GetTexturePool(aClient.GetFormat())->ReturnTextureClient(&aClient);
}
void
ClientLayerManager::ReportClientLost(TextureClient& aClient) {
GetTexturePool(aClient.GetFormat())->ReportClientLost();
}
void
ClientLayerManager::ClearCachedResources(Layer* aSubtree)
{
MOZ_ASSERT(!HasShadowManager() || !aSubtree);
mForwarder->ClearCachedResources();
if (aSubtree) {
ClearLayer(aSubtree);
} else if (mRoot) {
ClearLayer(mRoot);
}
for (size_t i = 0; i < mTexturePools.Length(); i++) {
mTexturePools[i]->Clear();
}
}
void
ClientLayerManager::HandleMemoryPressure()
{
for (size_t i = 0; i < mTexturePools.Length(); i++) {
mTexturePools[i]->ShrinkToMinimumSize();
}
}
void
ClientLayerManager::ClearLayer(Layer* aLayer)
{
ClientLayer::ToClientLayer(aLayer)->ClearCachedResources();
for (Layer* child = aLayer->GetFirstChild(); child;
child = child->GetNextSibling()) {
ClearLayer(child);
}
}
void
ClientLayerManager::GetBackendName(nsAString& aName)
{
switch (mForwarder->GetCompositorBackendType()) {
case LayersBackend::LAYERS_BASIC: aName.AssignLiteral("Basic"); return;
case LayersBackend::LAYERS_OPENGL: aName.AssignLiteral("OpenGL"); return;
case LayersBackend::LAYERS_D3D9: aName.AssignLiteral("Direct3D 9"); return;
case LayersBackend::LAYERS_D3D10: aName.AssignLiteral("Direct3D 10"); return;
case LayersBackend::LAYERS_D3D11: aName.AssignLiteral("Direct3D 11"); return;
default: NS_RUNTIMEABORT("Invalid backend");
}
}
bool
ClientLayerManager::ProgressiveUpdateCallback(bool aHasPendingNewThebesContent,
FrameMetrics& aMetrics,
bool aDrawingCritical)
{
#ifdef MOZ_WIDGET_ANDROID
MOZ_ASSERT(aMetrics.IsScrollable());
// This is derived from the code in
// gfx/layers/ipc/CompositorParent.cpp::TransformShadowTree.
CSSToLayerScale paintScale = aMetrics.LayersPixelsPerCSSPixel();
const CSSRect& metricsDisplayPort =
(aDrawingCritical && !aMetrics.mCriticalDisplayPort.IsEmpty()) ?
aMetrics.mCriticalDisplayPort : aMetrics.mDisplayPort;
LayerRect displayPort = (metricsDisplayPort + aMetrics.GetScrollOffset()) * paintScale;
ParentLayerPoint scrollOffset;
CSSToParentLayerScale zoom;
bool ret = AndroidBridge::Bridge()->ProgressiveUpdateCallback(
aHasPendingNewThebesContent, displayPort, paintScale.scale, aDrawingCritical,
scrollOffset, zoom);
aMetrics.SetScrollOffset(scrollOffset / zoom);
aMetrics.SetZoom(zoom);
return ret;
#else
return false;
#endif
}
ClientLayer::~ClientLayer()
{
if (HasShadow()) {
PLayerChild::Send__delete__(GetShadow());
}
MOZ_COUNT_DTOR(ClientLayer);
}
} // layers
} // mozilla