gecko-dev/gfx/layers/client/TextureClientSharedSurface.cpp

86 строки
3.0 KiB
C++

/* -*- 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 "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(std::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(std::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