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/* -*- Mode: C++; tab-width: 20; 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 "TextureClientSharedSurface.h"
#include "GLContext.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Logging.h" // for gfxDebug
#include "mozilla/layers/ISurfaceAllocator.h"
#include "mozilla/Unused.h"
#include "nsThreadUtils.h"
#include "SharedSurface.h"
using namespace mozilla::gl;
namespace mozilla {
namespace layers {
SharedSurfaceTextureData::SharedSurfaceTextureData(UniquePtr<gl::SharedSurface> surf)
: mSurf(Move(surf))
{}
SharedSurfaceTextureData::~SharedSurfaceTextureData()
{}
void
SharedSurfaceTextureData::Deallocate(LayersIPCChannel*)
{}
void
SharedSurfaceTextureData::FillInfo(TextureData::Info& aInfo) const
{
aInfo.size = mSurf->mSize;
aInfo.format = gfx::SurfaceFormat::UNKNOWN;
aInfo.hasIntermediateBuffer = false;
aInfo.hasSynchronization = false;
aInfo.supportsMoz2D = false;
aInfo.canExposeMappedData = false;
}
bool
SharedSurfaceTextureData::Serialize(SurfaceDescriptor& aOutDescriptor)
{
return mSurf->ToSurfaceDescriptor(&aOutDescriptor);
}
SharedSurfaceTextureClient::SharedSurfaceTextureClient(SharedSurfaceTextureData* aData,
TextureFlags aFlags,
LayersIPCChannel* aAllocator)
: TextureClient(aData, aFlags, aAllocator)
{
mWorkaroundAnnoyingSharedSurfaceLifetimeIssues = true;
}
already_AddRefed<SharedSurfaceTextureClient>
SharedSurfaceTextureClient::Create(UniquePtr<gl::SharedSurface> surf, gl::SurfaceFactory* factory,
LayersIPCChannel* aAllocator, TextureFlags aFlags)
{
if (!surf) {
return nullptr;
}
TextureFlags flags = aFlags | TextureFlags::RECYCLE | surf->GetTextureFlags();
SharedSurfaceTextureData* data = new SharedSurfaceTextureData(Move(surf));
return MakeAndAddRef<SharedSurfaceTextureClient>(data, flags, aAllocator);
}
SharedSurfaceTextureClient::~SharedSurfaceTextureClient()
{
// XXX - Things break when using the proper destruction handshake with
// SharedSurfaceTextureData because the TextureData outlives its gl
// context. Having a strong reference to the gl context creates a cycle.
// This needs to be fixed in a better way, though, because deleting
// the TextureData here can race with the compositor and cause flashing.
TextureData* data = mData;
mData = nullptr;
Destroy();
if (data) {
// Destroy mData right away without doing the proper deallocation handshake,
// because SharedSurface depends on things that may not outlive the texture's
// destructor so we can't wait until we know the compositor isn't using the
// texture anymore.
// It goes without saying that this is really bad and we should fix the bugs
// that block doing the right thing such as bug 1224199 sooner rather than
// later.
delete data;
}
}
} // namespace layers
} // namespace mozilla
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