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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/layers/client/TextureClientSharedSurface.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/layers/client/TextureClientSharedSurface.cpp')
-rw-r--r--gfx/layers/client/TextureClientSharedSurface.cpp96
1 files changed, 96 insertions, 0 deletions
diff --git a/gfx/layers/client/TextureClientSharedSurface.cpp b/gfx/layers/client/TextureClientSharedSurface.cpp
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+++ b/gfx/layers/client/TextureClientSharedSurface.cpp
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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