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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 "TextureRecorded.h"
#include "RecordedCanvasEventImpl.h"
namespace mozilla {
namespace layers {
// The texture ID is used in the GPU process both to lookup the real texture in
// the canvas threads and to lookup the SurfaceDescriptor for that texture in
// the compositor thread. It is therefore important that the ID is unique (per
// recording process), otherwise an old descriptor can be picked up. This means
// we can't use the pointer in the recording process as an ID like we do for
// other objects.
static int64_t sNextRecordedTextureId = 0;
RecordedTextureData::RecordedTextureData(
already_AddRefed<CanvasChild> aCanvasChild, gfx::IntSize aSize,
gfx::SurfaceFormat aFormat, TextureType aTextureType)
: mCanvasChild(aCanvasChild), mSize(aSize), mFormat(aFormat) {
mCanvasChild->EnsureRecorder(aTextureType);
}
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.
mDT = nullptr;
mCanvasChild->RecordEvent(RecordedTextureDestruction(mTextureId));
}
void RecordedTextureData::FillInfo(TextureData::Info& aInfo) const {
aInfo.size = mSize;
aInfo.format = mFormat;
aInfo.supportsMoz2D = true;
aInfo.hasSynchronization = true;
}
bool RecordedTextureData::Lock(OpenMode aMode) {
mCanvasChild->EnsureBeginTransaction();
if (!mDT) {
mTextureId = sNextRecordedTextureId++;
mCanvasChild->RecordEvent(RecordedNextTextureId(mTextureId));
mDT = mCanvasChild->CreateDrawTarget(mSize, mFormat);
if (!mDT) {
return false;
}
// We lock the TextureData when we create it to get the remote DrawTarget.
mCanvasChild->OnTextureWriteLock();
mLockedMode = aMode;
return true;
}
mCanvasChild->RecordEvent(RecordedTextureLock(mTextureId, aMode));
if (aMode & OpenMode::OPEN_WRITE) {
mCanvasChild->OnTextureWriteLock();
}
mLockedMode = aMode;
return true;
}
void RecordedTextureData::Unlock() {
if ((mLockedMode == OpenMode::OPEN_READ_WRITE) &&
mCanvasChild->ShouldCacheDataSurface()) {
mSnapshot = mDT->Snapshot();
mDT->DetachAllSnapshots();
mCanvasChild->RecordEvent(RecordedCacheDataSurface(mSnapshot.get()));
}
mCanvasChild->RecordEvent(RecordedTextureUnlock(mTextureId));
mLockedMode = OpenMode::OPEN_NONE;
}
already_AddRefed<gfx::DrawTarget> RecordedTextureData::BorrowDrawTarget() {
mSnapshot = nullptr;
return do_AddRef(mDT);
}
void RecordedTextureData::EndDraw() {
MOZ_ASSERT(mDT->hasOneRef());
MOZ_ASSERT(mLockedMode == OpenMode::OPEN_READ_WRITE);
if (mCanvasChild->ShouldCacheDataSurface()) {
mSnapshot = mDT->Snapshot();
mCanvasChild->RecordEvent(RecordedCacheDataSurface(mSnapshot.get()));
}
}
already_AddRefed<gfx::SourceSurface> RecordedTextureData::BorrowSnapshot() {
MOZ_ASSERT(mDT);
if (mSnapshot) {
return mCanvasChild->WrapSurface(mSnapshot);
}
return mCanvasChild->WrapSurface(mDT->Snapshot());
}
void RecordedTextureData::Deallocate(LayersIPCChannel* aAllocator) {}
bool RecordedTextureData::Serialize(SurfaceDescriptor& aDescriptor) {
aDescriptor = SurfaceDescriptorRecorded(mTextureId);
return true;
}
void RecordedTextureData::OnForwardedToHost() {
mCanvasChild->OnTextureForwarded();
}
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;
}
} // namespace layers
} // namespace mozilla
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