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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
#include "TextureRecorded.h"
#include "mozilla/gfx/DrawTargetRecording.h"
#include "mozilla/layers/CompositableForwarder.h"
#include "RecordedCanvasEventImpl.h"
namespace mozilla {
namespace layers {
RecordedTextureData::RecordedTextureData(
already_AddRefed<CanvasChild> aCanvasChild, gfx::IntSize aSize,
gfx::SurfaceFormat aFormat, TextureType aTextureType,
TextureType aWebglTextureType)
: mRemoteTextureOwnerId(RemoteTextureOwnerId::GetNext()),
mCanvasChild(aCanvasChild),
mSize(aSize),
mFormat(aFormat) {}
RecordedTextureData::~RecordedTextureData() {
// We need the translator to drop its reference for the DrawTarget first,
// because the TextureData might need to destroy its DrawTarget within a lock.
mSnapshot = nullptr;
DetachSnapshotWrapper();
if (mDT) {
mDT->DetachTextureData(this);
mDT = nullptr;
}
mCanvasChild->RecordEvent(RecordedTextureDestruction(
mRemoteTextureOwnerId, ToRemoteTextureTxnType(mFwdTransactionTracker),
ToRemoteTextureTxnId(mFwdTransactionTracker)));
}
void RecordedTextureData::FillInfo(TextureData::Info& aInfo) const {
aInfo.size = mSize;
aInfo.format = mFormat;
aInfo.supportsMoz2D = true;
aInfo.hasSynchronization = true;
}
void RecordedTextureData::InvalidateContents() { mInvalidContents = true; }
bool RecordedTextureData::Lock(OpenMode aMode) {
if (!mCanvasChild->EnsureBeginTransaction()) {
return false;
}
if (!mDT && mInited) {
return false;
}
// If modifying the texture, then allocate a new remote texture id.
if (aMode & OpenMode::OPEN_WRITE) {
mUsedRemoteTexture = false;
}
bool wasInvalidContents = mInvalidContents;
mInvalidContents = false;
if (!mDT && !mInited) {
mInited = true;
mDT = mCanvasChild->CreateDrawTarget(mRemoteTextureOwnerId, mSize, mFormat);
if (!mDT) {
return false;
}
mDT->AttachTextureData(this);
// We lock the TextureData when we create it to get the remote DrawTarget.
mLockedMode = aMode;
return true;
}
mCanvasChild->RecordEvent(
RecordedTextureLock(mRemoteTextureOwnerId, aMode, wasInvalidContents));
mLockedMode = aMode;
return true;
}
void RecordedTextureData::DetachSnapshotWrapper(bool aInvalidate,
bool aRelease) {
if (mSnapshotWrapper) {
// If the snapshot only has one ref, then we don't need to worry about
// copying before invalidation since it is about to be deleted. Otherwise,
// we need to ensure any internal data is appropriately copied before
// shmems are potentially overwritten if there are still existing users.
mCanvasChild->DetachSurface(mSnapshotWrapper,
aInvalidate && !mSnapshotWrapper->hasOneRef());
if (aRelease) {
mSnapshotWrapper = nullptr;
}
}
}
void RecordedTextureData::Unlock() {
if ((mLockedMode == OpenMode::OPEN_READ_WRITE) &&
mCanvasChild->ShouldCacheDataSurface()) {
DetachSnapshotWrapper();
mSnapshot = mDT->Snapshot();
mDT->DetachAllSnapshots();
mCanvasChild->RecordEvent(RecordedCacheDataSurface(mSnapshot.get()));
}
mCanvasChild->RecordEvent(RecordedTextureUnlock(mRemoteTextureOwnerId));
mLockedMode = OpenMode::OPEN_NONE;
}
already_AddRefed<gfx::DrawTarget> RecordedTextureData::BorrowDrawTarget() {
if (mLockedMode & OpenMode::OPEN_WRITE) {
// The snapshot will be invalidated.
mSnapshot = nullptr;
DetachSnapshotWrapper(true);
}
return do_AddRef(mDT);
}
void RecordedTextureData::EndDraw() {
MOZ_ASSERT(mDT->hasOneRef());
MOZ_ASSERT(mLockedMode == OpenMode::OPEN_READ_WRITE);
if (mCanvasChild->ShouldCacheDataSurface()) {
DetachSnapshotWrapper();
mSnapshot = mDT->Snapshot();
mCanvasChild->RecordEvent(RecordedCacheDataSurface(mSnapshot.get()));
}
}
void RecordedTextureData::DrawTargetWillChange() {
// The DrawTargetRecording will be modified, so ensure that possibly the last
// reference to a snapshot is discarded so that it does not inadvertently
// force a copy.
mSnapshot = nullptr;
DetachSnapshotWrapper(true);
}
already_AddRefed<gfx::SourceSurface> RecordedTextureData::BorrowSnapshot() {
if (mSnapshotWrapper) {
// The DT is unmodified since the last time snapshot was borrowed, so it
// is safe to reattach the snapshot for shmem readbacks.
mCanvasChild->AttachSurface(mSnapshotWrapper);
return do_AddRef(mSnapshotWrapper);
}
// There are some failure scenarios where we have no DrawTarget and
// BorrowSnapshot is called in an attempt to copy to a new texture.
if (!mDT) {
return nullptr;
}
RefPtr<gfx::SourceSurface> wrapper = mCanvasChild->WrapSurface(
mSnapshot ? mSnapshot : mDT->Snapshot(), mRemoteTextureOwnerId);
mSnapshotWrapper = wrapper;
return wrapper.forget();
}
void RecordedTextureData::ReturnSnapshot(
already_AddRefed<gfx::SourceSurface> aSnapshot) {
RefPtr<gfx::SourceSurface> snapshot = aSnapshot;
// The snapshot needs to be marked detached but we keep the wrapper around
// so that it can be reused without repeatedly creating it and accidentally
// reading back data for each new instantiation.
DetachSnapshotWrapper(false, false);
}
void RecordedTextureData::Deallocate(LayersIPCChannel* aAllocator) {}
bool RecordedTextureData::Serialize(SurfaceDescriptor& aDescriptor) {
// If something is querying the id, assume it is going to be composited.
if (!mUsedRemoteTexture) {
mLastRemoteTextureId = RemoteTextureId::GetNext();
mCanvasChild->RecordEvent(
RecordedPresentTexture(mRemoteTextureOwnerId, mLastRemoteTextureId));
mUsedRemoteTexture = true;
}
aDescriptor = SurfaceDescriptorRemoteTexture(mLastRemoteTextureId,
mRemoteTextureOwnerId);
return true;
}
already_AddRefed<FwdTransactionTracker>
RecordedTextureData::UseCompositableForwarder(
CompositableForwarder* aForwarder) {
return FwdTransactionTracker::GetOrCreate(mFwdTransactionTracker);
}
void RecordedTextureData::OnForwardedToHost() {
// Compositing with RecordedTextureData requires RemoteTextureMap.
MOZ_CRASH("OnForwardedToHost not supported!");
}
TextureFlags RecordedTextureData::GetTextureFlags() const {
// With WebRender, resource open happens asynchronously on RenderThread.
// Use WAIT_HOST_USAGE_END to keep TextureClient alive during host side usage.
return TextureFlags::WAIT_HOST_USAGE_END;
}
bool RecordedTextureData::RequiresRefresh() const {
return mCanvasChild->RequiresRefresh(mRemoteTextureOwnerId);
}
} // namespace layers
} // namespace mozilla