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gecko/gfx/layers/ipc/ShadowLayers.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* 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 <set>
#include <vector>
#include "gfxSharedImageSurface.h"
#include "gfxPlatform.h"
#include "AutoOpenSurface.h"
#include "mozilla/ipc/SharedMemorySysV.h"
#include "mozilla/layers/PLayerChild.h"
#include "mozilla/layers/PLayersChild.h"
#include "mozilla/layers/PLayersParent.h"
#include "ShadowLayers.h"
#include "ShadowLayerChild.h"
#include "gfxipc/ShadowLayerUtils.h"
#include "RenderTrace.h"
#include "sampler.h"
#include "nsXULAppAPI.h"
using namespace mozilla::ipc;
namespace mozilla {
namespace layers {
typedef nsTArray<SurfaceDescriptor> BufferArray;
typedef std::vector<Edit> EditVector;
typedef std::set<ShadowableLayer*> ShadowableLayerSet;
class Transaction
{
public:
Transaction()
: mSwapRequired(false)
, mOpen(false)
{}
void Begin(const nsIntRect& aTargetBounds, ScreenRotation aRotation)
{
mOpen = true;
mTargetBounds = aTargetBounds;
mTargetRotation = aRotation;
}
void AddEdit(const Edit& aEdit)
{
NS_ABORT_IF_FALSE(!Finished(), "forgot BeginTransaction?");
mCset.push_back(aEdit);
}
void AddPaint(const Edit& aPaint)
{
AddNoSwapPaint(aPaint);
mSwapRequired = true;
}
void AddNoSwapPaint(const Edit& aPaint)
{
NS_ABORT_IF_FALSE(!Finished(), "forgot BeginTransaction?");
mPaints.push_back(aPaint);
}
void AddMutant(ShadowableLayer* aLayer)
{
NS_ABORT_IF_FALSE(!Finished(), "forgot BeginTransaction?");
mMutants.insert(aLayer);
}
void AddBufferToDestroy(gfxSharedImageSurface* aBuffer)
{
return AddBufferToDestroy(aBuffer->GetShmem());
}
void AddBufferToDestroy(const SurfaceDescriptor& aBuffer)
{
NS_ABORT_IF_FALSE(!Finished(), "forgot BeginTransaction?");
mDyingBuffers.AppendElement(aBuffer);
}
void End()
{
mCset.clear();
mPaints.clear();
mDyingBuffers.Clear();
mMutants.clear();
mOpen = false;
mSwapRequired = false;
}
bool Empty() const {
return mCset.empty() && mPaints.empty() && mMutants.empty();
}
bool Finished() const { return !mOpen && Empty(); }
EditVector mCset;
EditVector mPaints;
BufferArray mDyingBuffers;
ShadowableLayerSet mMutants;
nsIntRect mTargetBounds;
ScreenRotation mTargetRotation;
bool mSwapRequired;
private:
bool mOpen;
// disabled
Transaction(const Transaction&);
Transaction& operator=(const Transaction&);
};
struct AutoTxnEnd {
AutoTxnEnd(Transaction* aTxn) : mTxn(aTxn) {}
~AutoTxnEnd() { mTxn->End(); }
Transaction* mTxn;
};
ShadowLayerForwarder::ShadowLayerForwarder()
: mShadowManager(NULL)
, mMaxTextureSize(0)
, mParentBackend(mozilla::layers::LAYERS_NONE)
, mIsFirstPaint(false)
{
mTxn = new Transaction();
}
ShadowLayerForwarder::~ShadowLayerForwarder()
{
NS_ABORT_IF_FALSE(mTxn->Finished(), "unfinished transaction?");
delete mTxn;
}
void
ShadowLayerForwarder::BeginTransaction(const nsIntRect& aTargetBounds,
ScreenRotation aRotation)
{
NS_ABORT_IF_FALSE(HasShadowManager(), "no manager to forward to");
NS_ABORT_IF_FALSE(mTxn->Finished(), "uncommitted txn?");
mTxn->Begin(aTargetBounds, aRotation);
}
static PLayerChild*
Shadow(ShadowableLayer* aLayer)
{
return aLayer->GetShadow();
}
template<typename OpCreateT>
static void
CreatedLayer(Transaction* aTxn, ShadowableLayer* aLayer)
{
aTxn->AddEdit(OpCreateT(NULL, Shadow(aLayer)));
}
void
ShadowLayerForwarder::CreatedThebesLayer(ShadowableLayer* aThebes)
{
CreatedLayer<OpCreateThebesLayer>(mTxn, aThebes);
}
void
ShadowLayerForwarder::CreatedContainerLayer(ShadowableLayer* aContainer)
{
CreatedLayer<OpCreateContainerLayer>(mTxn, aContainer);
}
void
ShadowLayerForwarder::CreatedImageLayer(ShadowableLayer* aImage)
{
CreatedLayer<OpCreateImageLayer>(mTxn, aImage);
}
void
ShadowLayerForwarder::CreatedColorLayer(ShadowableLayer* aColor)
{
CreatedLayer<OpCreateColorLayer>(mTxn, aColor);
}
void
ShadowLayerForwarder::CreatedCanvasLayer(ShadowableLayer* aCanvas)
{
CreatedLayer<OpCreateCanvasLayer>(mTxn, aCanvas);
}
void
ShadowLayerForwarder::CreatedRefLayer(ShadowableLayer* aRef)
{
CreatedLayer<OpCreateRefLayer>(mTxn, aRef);
}
void
ShadowLayerForwarder::DestroyedThebesBuffer(ShadowableLayer* aThebes,
const SurfaceDescriptor& aBackBufferToDestroy)
{
mTxn->AddBufferToDestroy(aBackBufferToDestroy);
}
void
ShadowLayerForwarder::Mutated(ShadowableLayer* aMutant)
{
mTxn->AddMutant(aMutant);
}
void
ShadowLayerForwarder::SetRoot(ShadowableLayer* aRoot)
{
mTxn->AddEdit(OpSetRoot(NULL, Shadow(aRoot)));
}
void
ShadowLayerForwarder::InsertAfter(ShadowableLayer* aContainer,
ShadowableLayer* aChild,
ShadowableLayer* aAfter)
{
if (aAfter)
mTxn->AddEdit(OpInsertAfter(NULL, Shadow(aContainer),
NULL, Shadow(aChild),
NULL, Shadow(aAfter)));
else
mTxn->AddEdit(OpAppendChild(NULL, Shadow(aContainer),
NULL, Shadow(aChild)));
}
void
ShadowLayerForwarder::RemoveChild(ShadowableLayer* aContainer,
ShadowableLayer* aChild)
{
mTxn->AddEdit(OpRemoveChild(NULL, Shadow(aContainer),
NULL, Shadow(aChild)));
}
void
ShadowLayerForwarder::RepositionChild(ShadowableLayer* aContainer,
ShadowableLayer* aChild,
ShadowableLayer* aAfter)
{
if (aAfter)
mTxn->AddEdit(OpRepositionChild(NULL, Shadow(aContainer),
NULL, Shadow(aChild),
NULL, Shadow(aAfter)));
else
mTxn->AddEdit(OpRaiseToTopChild(NULL, Shadow(aContainer),
NULL, Shadow(aChild)));
}
void
ShadowLayerForwarder::PaintedThebesBuffer(ShadowableLayer* aThebes,
const nsIntRegion& aUpdatedRegion,
const nsIntRect& aBufferRect,
const nsIntPoint& aBufferRotation,
const SurfaceDescriptor& aNewFrontBuffer)
{
mTxn->AddPaint(OpPaintThebesBuffer(NULL, Shadow(aThebes),
ThebesBuffer(aNewFrontBuffer,
aBufferRect,
aBufferRotation),
aUpdatedRegion));
}
void
ShadowLayerForwarder::PaintedTiledLayerBuffer(ShadowableLayer* aLayer,
BasicTiledLayerBuffer* aTiledLayerBuffer)
{
if (XRE_GetProcessType() != GeckoProcessType_Default)
NS_RUNTIMEABORT("PaintedTiledLayerBuffer must be made IPC safe (not share pointers)");
mTxn->AddNoSwapPaint(OpPaintTiledLayerBuffer(NULL, Shadow(aLayer),
uintptr_t(aTiledLayerBuffer)));
}
void
ShadowLayerForwarder::PaintedImage(ShadowableLayer* aImage,
const SharedImage& aNewFrontImage)
{
mTxn->AddPaint(OpPaintImage(NULL, Shadow(aImage),
aNewFrontImage));
}
void
ShadowLayerForwarder::PaintedCanvas(ShadowableLayer* aCanvas,
bool aNeedYFlip,
const SurfaceDescriptor& aNewFrontSurface)
{
mTxn->AddPaint(OpPaintCanvas(NULL, Shadow(aCanvas),
aNewFrontSurface,
aNeedYFlip));
}
bool
ShadowLayerForwarder::EndTransaction(InfallibleTArray<EditReply>* aReplies)
{
SAMPLE_LABEL("ShadowLayerForwarder", "EndTranscation");
RenderTraceScope rendertrace("Foward Transaction", "000091");
NS_ABORT_IF_FALSE(HasShadowManager(), "no manager to forward to");
NS_ABORT_IF_FALSE(!mTxn->Finished(), "forgot BeginTransaction?");
AutoTxnEnd _(mTxn);
if (mTxn->Empty()) {
MOZ_LAYERS_LOG(("[LayersForwarder] 0-length cset (?), skipping Update()"));
return true;
}
MOZ_LAYERS_LOG(("[LayersForwarder] destroying buffers..."));
for (uint32_t i = 0; i < mTxn->mDyingBuffers.Length(); ++i) {
DestroySharedSurface(&mTxn->mDyingBuffers[i]);
}
MOZ_LAYERS_LOG(("[LayersForwarder] building transaction..."));
// We purposely add attribute-change ops to the final changeset
// before we add paint ops. This allows layers to record the
// attribute changes before new pixels arrive, which can be useful
// for setting up back/front buffers.
RenderTraceScope rendertrace2("Foward Transaction", "000092");
for (ShadowableLayerSet::const_iterator it = mTxn->mMutants.begin();
it != mTxn->mMutants.end(); ++it) {
ShadowableLayer* shadow = *it;
Layer* mutant = shadow->AsLayer();
NS_ABORT_IF_FALSE(!!mutant, "unshadowable layer?");
LayerAttributes attrs;
CommonLayerAttributes& common = attrs.common();
common.visibleRegion() = mutant->GetVisibleRegion();
common.postXScale() = mutant->GetPostXScale();
common.postYScale() = mutant->GetPostYScale();
common.transform() = mutant->GetBaseTransform();
common.contentFlags() = mutant->GetContentFlags();
common.opacity() = mutant->GetOpacity();
common.useClipRect() = !!mutant->GetClipRect();
common.clipRect() = (common.useClipRect() ?
*mutant->GetClipRect() : nsIntRect());
common.isFixedPosition() = mutant->GetIsFixedPosition();
common.fixedPositionAnchor() = mutant->GetFixedPositionAnchor();
if (Layer* maskLayer = mutant->GetMaskLayer()) {
common.maskLayerChild() = Shadow(maskLayer->AsShadowableLayer());
} else {
common.maskLayerChild() = NULL;
}
common.maskLayerParent() = NULL;
common.animations() = mutant->GetAnimations();
attrs.specific() = null_t();
mutant->FillSpecificAttributes(attrs.specific());
mTxn->AddEdit(OpSetLayerAttributes(NULL, Shadow(shadow), attrs));
}
AutoInfallibleTArray<Edit, 10> cset;
size_t nCsets = mTxn->mCset.size() + mTxn->mPaints.size();
NS_ABORT_IF_FALSE(nCsets > 0, "should have bailed by now");
cset.SetCapacity(nCsets);
if (!mTxn->mCset.empty()) {
cset.AppendElements(&mTxn->mCset.front(), mTxn->mCset.size());
}
// Paints after non-paint ops, including attribute changes. See
// above.
if (!mTxn->mPaints.empty()) {
cset.AppendElements(&mTxn->mPaints.front(), mTxn->mPaints.size());
}
TargetConfig targetConfig(mTxn->mTargetBounds, mTxn->mTargetRotation);
MOZ_LAYERS_LOG(("[LayersForwarder] syncing before send..."));
PlatformSyncBeforeUpdate();
if (mTxn->mSwapRequired) {
MOZ_LAYERS_LOG(("[LayersForwarder] sending transaction..."));
RenderTraceScope rendertrace3("Forward Transaction", "000093");
if (!mShadowManager->SendUpdate(cset, targetConfig, mIsFirstPaint,
aReplies)) {
MOZ_LAYERS_LOG(("[LayersForwarder] WARNING: sending transaction failed!"));
return false;
}
} else {
// If we don't require a swap we can call SendUpdateNoSwap which
// assumes that aReplies is empty (DEBUG assertion)
MOZ_LAYERS_LOG(("[LayersForwarder] sending no swap transaction..."));
RenderTraceScope rendertrace3("Forward NoSwap Transaction", "000093");
if (!mShadowManager->SendUpdateNoSwap(cset, targetConfig, mIsFirstPaint)) {
MOZ_LAYERS_LOG(("[LayersForwarder] WARNING: sending transaction failed!"));
return false;
}
}
mIsFirstPaint = false;
MOZ_LAYERS_LOG(("[LayersForwarder] ... done"));
return true;
}
bool
ShadowLayerForwarder::ShadowDrawToTarget(gfxContext* aTarget) {
SurfaceDescriptor descriptorIn, descriptorOut;
AllocBuffer(aTarget->OriginalSurface()->GetSize(),
aTarget->OriginalSurface()->GetContentType(),
&descriptorIn);
if (!mShadowManager->SendDrawToSurface(descriptorIn, &descriptorOut)) {
return false;
}
nsRefPtr<gfxASurface> surface = OpenDescriptor(OPEN_READ_WRITE, descriptorOut);
aTarget->SetOperator(gfxContext::OPERATOR_SOURCE);
aTarget->DrawSurface(surface, surface->GetSize());
surface = nullptr;
DestroySharedSurface(&descriptorOut);
return true;
}
SharedMemory::SharedMemoryType
OptimalShmemType()
{
#if defined(MOZ_PLATFORM_MAEMO) && defined(MOZ_HAVE_SHAREDMEMORYSYSV)
// Use SysV memory because maemo5 on the N900 only allots 64MB to
// /dev/shm, even though it has 1GB(!!) of system memory. Sys V shm
// is allocated from a different pool. We don't want an arbitrary
// cap that's much much lower than available memory on the memory we
// use for layers.
return SharedMemory::TYPE_SYSV;
#else
return SharedMemory::TYPE_BASIC;
#endif
}
bool
ShadowLayerForwarder::AllocBuffer(const gfxIntSize& aSize,
gfxASurface::gfxContentType aContent,
gfxSharedImageSurface** aBuffer)
{
NS_ABORT_IF_FALSE(HasShadowManager(), "no manager to forward to");
SharedMemory::SharedMemoryType shmemType = OptimalShmemType();
gfxASurface::gfxImageFormat format = gfxPlatform::GetPlatform()->OptimalFormatForContent(aContent);
nsRefPtr<gfxSharedImageSurface> back =
gfxSharedImageSurface::CreateUnsafe(mShadowManager, aSize, format, shmemType);
if (!back)
return false;
*aBuffer = nullptr;
back.swap(*aBuffer);
return true;
}
bool
ShadowLayerForwarder::AllocBuffer(const gfxIntSize& aSize,
gfxASurface::gfxContentType aContent,
SurfaceDescriptor* aBuffer)
{
return AllocBufferWithCaps(aSize, aContent, DEFAULT_BUFFER_CAPS, aBuffer);
}
bool
ShadowLayerForwarder::AllocBufferWithCaps(const gfxIntSize& aSize,
gfxASurface::gfxContentType aContent,
uint32_t aCaps,
SurfaceDescriptor* aBuffer)
{
bool tryPlatformSurface = true;
#ifdef DEBUG
tryPlatformSurface = !PR_GetEnv("MOZ_LAYERS_FORCE_SHMEM_SURFACES");
#endif
if (tryPlatformSurface &&
PlatformAllocBuffer(aSize, aContent, aCaps, aBuffer)) {
return true;
}
nsRefPtr<gfxSharedImageSurface> buffer;
if (!AllocBuffer(aSize, aContent,
getter_AddRefs(buffer)))
return false;
*aBuffer = buffer->GetShmem();
return true;
}
/*static*/ already_AddRefed<gfxASurface>
ShadowLayerForwarder::OpenDescriptor(OpenMode aMode,
const SurfaceDescriptor& aSurface)
{
nsRefPtr<gfxASurface> surf = PlatformOpenDescriptor(aMode, aSurface);
if (surf) {
return surf.forget();
}
switch (aSurface.type()) {
case SurfaceDescriptor::TShmem: {
surf = gfxSharedImageSurface::Open(aSurface.get_Shmem());
return surf.forget();
}
default:
NS_RUNTIMEABORT("unexpected SurfaceDescriptor type!");
return nullptr;
}
}
/*static*/ gfxContentType
ShadowLayerForwarder::GetDescriptorSurfaceContentType(
const SurfaceDescriptor& aDescriptor, OpenMode aMode,
gfxASurface** aSurface)
{
gfxContentType content;
if (PlatformGetDescriptorSurfaceContentType(aDescriptor, aMode,
&content, aSurface)) {
return content;
}
nsRefPtr<gfxASurface> surface = OpenDescriptor(aMode, aDescriptor);
content = surface->GetContentType();
*aSurface = surface.forget().get();
return content;
}
/*static*/ gfxIntSize
ShadowLayerForwarder::GetDescriptorSurfaceSize(
const SurfaceDescriptor& aDescriptor, OpenMode aMode,
gfxASurface** aSurface)
{
gfxIntSize size;
if (PlatformGetDescriptorSurfaceSize(aDescriptor, aMode, &size, aSurface)) {
return size;
}
nsRefPtr<gfxASurface> surface = OpenDescriptor(aMode, aDescriptor);
size = surface->GetSize();
*aSurface = surface.forget().get();
return size;
}
/*static*/ void
ShadowLayerForwarder::CloseDescriptor(const SurfaceDescriptor& aDescriptor)
{
PlatformCloseDescriptor(aDescriptor);
// There's no "close" needed for Shmem surfaces.
}
// Destroy the Shmem SurfaceDescriptor |aSurface|.
template<class ShmemDeallocator>
static void
DestroySharedShmemSurface(SurfaceDescriptor* aSurface,
ShmemDeallocator* aDeallocator)
{
switch (aSurface->type()) {
case SurfaceDescriptor::TShmem: {
aDeallocator->DeallocShmem(aSurface->get_Shmem());
*aSurface = SurfaceDescriptor();
return;
}
default:
NS_RUNTIMEABORT("unexpected SurfaceDescriptor type!");
return;
}
}
void
ShadowLayerForwarder::DestroySharedSurface(SurfaceDescriptor* aSurface)
{
if (PlatformDestroySharedSurface(aSurface)) {
return;
}
if (aSurface->type() == SurfaceDescriptor::TShmem) {
DestroySharedShmemSurface(aSurface, mShadowManager);
}
}
PLayerChild*
ShadowLayerForwarder::ConstructShadowFor(ShadowableLayer* aLayer)
{
NS_ABORT_IF_FALSE(HasShadowManager(), "no manager to forward to");
return mShadowManager->SendPLayerConstructor(new ShadowLayerChild(aLayer));
}
void
ShadowLayerManager::DestroySharedSurface(gfxSharedImageSurface* aSurface,
PLayersParent* aDeallocator)
{
aDeallocator->DeallocShmem(aSurface->GetShmem());
}
void
ShadowLayerManager::DestroySharedSurface(SurfaceDescriptor* aSurface,
PLayersParent* aDeallocator)
{
if (PlatformDestroySharedSurface(aSurface)) {
return;
}
if (aSurface->type() == SurfaceDescriptor::TShmem) {
DestroySharedShmemSurface(aSurface, aDeallocator);
}
}
#if !defined(MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS)
bool
ShadowLayerForwarder::PlatformAllocBuffer(const gfxIntSize&,
gfxASurface::gfxContentType,
uint32_t,
SurfaceDescriptor*)
{
return false;
}
/*static*/ already_AddRefed<gfxASurface>
ShadowLayerForwarder::PlatformOpenDescriptor(OpenMode,
const SurfaceDescriptor&)
{
return nullptr;
}
/*static*/ bool
ShadowLayerForwarder::PlatformCloseDescriptor(const SurfaceDescriptor&)
{
return false;
}
/*static*/ bool
ShadowLayerForwarder::PlatformGetDescriptorSurfaceContentType(
const SurfaceDescriptor&,
OpenMode,
gfxContentType*,
gfxASurface**)
{
return false;
}
/*static*/ bool
ShadowLayerForwarder::PlatformGetDescriptorSurfaceSize(
const SurfaceDescriptor&,
OpenMode,
gfxIntSize*,
gfxASurface**)
{
return false;
}
bool
ShadowLayerForwarder::PlatformDestroySharedSurface(SurfaceDescriptor*)
{
return false;
}
/*static*/ void
ShadowLayerForwarder::PlatformSyncBeforeUpdate()
{
}
bool
ShadowLayerManager::PlatformDestroySharedSurface(SurfaceDescriptor*)
{
return false;
}
/*static*/ already_AddRefed<TextureImage>
ShadowLayerManager::OpenDescriptorForDirectTexturing(GLContext*,
const SurfaceDescriptor&,
GLenum)
{
return nullptr;
}
/*static*/ void
ShadowLayerManager::PlatformSyncBeforeReplyUpdate()
{
}
#endif // !defined(MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS)
bool
IsSurfaceDescriptorValid(const SurfaceDescriptor& aSurface)
{
return SurfaceDescriptor::T__None != aSurface.type();
}
AutoOpenSurface::AutoOpenSurface(OpenMode aMode,
const SurfaceDescriptor& aDescriptor)
: mDescriptor(aDescriptor)
, mMode(aMode)
{
MOZ_ASSERT(IsSurfaceDescriptorValid(mDescriptor));
}
AutoOpenSurface::~AutoOpenSurface()
{
if (mSurface) {
mSurface = nullptr;
ShadowLayerForwarder::CloseDescriptor(mDescriptor);
}
}
gfxContentType
AutoOpenSurface::ContentType()
{
if (mSurface) {
return mSurface->GetContentType();
}
return ShadowLayerForwarder::GetDescriptorSurfaceContentType(
mDescriptor, mMode, getter_AddRefs(mSurface));
}
gfxIntSize
AutoOpenSurface::Size()
{
if (mSurface) {
return mSurface->GetSize();
}
return ShadowLayerForwarder::GetDescriptorSurfaceSize(
mDescriptor, mMode, getter_AddRefs(mSurface));
}
gfxASurface*
AutoOpenSurface::Get()
{
if (!mSurface) {
mSurface = ShadowLayerForwarder::OpenDescriptor(mMode, mDescriptor);
}
return mSurface.get();
}
gfxImageSurface*
AutoOpenSurface::GetAsImage()
{
if (!mSurfaceAsImage) {
mSurfaceAsImage = Get()->GetAsImageSurface();
}
return mSurfaceAsImage.get();
}
} // namespace layers
} // namespace mozilla
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