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diff --git a/gfx/layers/d3d11/TextureD3D11.h b/gfx/layers/d3d11/TextureD3D11.h
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+++ b/gfx/layers/d3d11/TextureD3D11.h
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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/. */
+
+#ifndef MOZILLA_GFX_TEXTURED3D11_H
+#define MOZILLA_GFX_TEXTURED3D11_H
+
+#include <d3d11.h>
+
+#include <vector>
+
+#include "d3d9.h"
+#include "gfxWindowsPlatform.h"
+#include "mozilla/GfxMessageUtils.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/layers/Compositor.h"
+#include "mozilla/layers/SyncObject.h"
+#include "mozilla/layers/TextureClient.h"
+#include "mozilla/layers/TextureHost.h"
+
+namespace mozilla {
+namespace gl {
+class GLBlitHelper;
+}
+
+namespace layers {
+
+already_AddRefed<TextureHost> CreateTextureHostD3D11(
+    const SurfaceDescriptor& aDesc, ISurfaceAllocator* aDeallocator,
+    LayersBackend aBackend, TextureFlags aFlags);
+
+class MOZ_RAII AutoTextureLock final {
+ public:
+  AutoTextureLock(IDXGIKeyedMutex* aMutex, HRESULT& aResult,
+                  uint32_t aTimeout = 0);
+  ~AutoTextureLock();
+
+ private:
+  RefPtr<IDXGIKeyedMutex> mMutex;
+  HRESULT mResult;
+};
+
+class CompositorD3D11;
+
+class D3D11TextureData final : public TextureData {
+ public:
+  // If aDevice is null, use one provided by gfxWindowsPlatform.
+  static D3D11TextureData* Create(gfx::IntSize aSize,
+                                  gfx::SurfaceFormat aFormat,
+                                  TextureAllocationFlags aAllocFlags,
+                                  ID3D11Device* aDevice = nullptr);
+  static D3D11TextureData* Create(gfx::SourceSurface* aSurface,
+                                  TextureAllocationFlags aAllocFlags,
+                                  ID3D11Device* aDevice = nullptr);
+
+  virtual ~D3D11TextureData();
+
+  bool UpdateFromSurface(gfx::SourceSurface* aSurface) override;
+
+  bool Lock(OpenMode aMode) override;
+
+  void Unlock() override;
+
+  already_AddRefed<gfx::DrawTarget> BorrowDrawTarget() override;
+
+  TextureData* CreateSimilar(LayersIPCChannel* aAllocator,
+                             LayersBackend aLayersBackend, TextureFlags aFlags,
+                             TextureAllocationFlags aAllocFlags) const override;
+
+  void SyncWithObject(RefPtr<SyncObjectClient> aSyncObject) override;
+
+  ID3D11Texture2D* GetD3D11Texture() const { return mTexture; }
+
+  void Deallocate(LayersIPCChannel* aAllocator) override;
+
+  D3D11TextureData* AsD3D11TextureData() override { return this; }
+
+  TextureAllocationFlags GetTextureAllocationFlags() const {
+    return mAllocationFlags;
+  }
+
+  void FillInfo(TextureData::Info& aInfo) const override;
+
+  bool Serialize(SurfaceDescriptor& aOutDescrptor) override;
+  void GetSubDescriptor(RemoteDecoderVideoSubDescriptor* aOutDesc) override;
+
+  gfx::YUVColorSpace GetYUVColorSpace() const { return mYUVColorSpace; }
+  void SetYUVColorSpace(gfx::YUVColorSpace aColorSpace) {
+    mYUVColorSpace = aColorSpace;
+  }
+  gfx::ColorRange GetColorRange() const { return mColorRange; }
+  void SetColorRange(gfx::ColorRange aColorRange) { mColorRange = aColorRange; }
+
+  gfx::IntSize GetSize() const { return mSize; }
+  gfx::SurfaceFormat GetSurfaceFormat() const { return mFormat; }
+
+  TextureFlags GetTextureFlags() const override;
+
+ private:
+  D3D11TextureData(ID3D11Texture2D* aTexture, gfx::IntSize aSize,
+                   gfx::SurfaceFormat aFormat, TextureAllocationFlags aFlags);
+
+  void GetDXGIResource(IDXGIResource** aOutResource);
+
+  bool PrepareDrawTargetInLock(OpenMode aMode);
+
+  friend class gl::GLBlitHelper;
+  bool SerializeSpecific(SurfaceDescriptorD3D10* aOutDesc);
+
+  static D3D11TextureData* Create(gfx::IntSize aSize,
+                                  gfx::SurfaceFormat aFormat,
+                                  gfx::SourceSurface* aSurface,
+                                  TextureAllocationFlags aAllocFlags,
+                                  ID3D11Device* aDevice = nullptr);
+
+  // Hold on to the DrawTarget because it is expensive to create one each
+  // ::Lock.
+  RefPtr<gfx::DrawTarget> mDrawTarget;
+  gfx::IntSize mSize;
+  gfx::SurfaceFormat mFormat;
+  gfx::YUVColorSpace mYUVColorSpace = gfx::YUVColorSpace::UNKNOWN;
+  gfx::ColorRange mColorRange = gfx::ColorRange::LIMITED;
+  bool mNeedsClear;
+  bool mNeedsClearWhite;
+  bool mHasSynchronization;
+  bool mIsForOutOfBandContent;
+
+  RefPtr<ID3D11Texture2D> mTexture;
+  const TextureAllocationFlags mAllocationFlags;
+};
+
+class DXGIYCbCrTextureData : public TextureData {
+  friend class gl::GLBlitHelper;
+
+ public:
+  static DXGIYCbCrTextureData* Create(
+      IDirect3DTexture9* aTextureY, IDirect3DTexture9* aTextureCb,
+      IDirect3DTexture9* aTextureCr, HANDLE aHandleY, HANDLE aHandleCb,
+      HANDLE aHandleCr, const gfx::IntSize& aSize, const gfx::IntSize& aSizeY,
+      const gfx::IntSize& aSizeCbCr, gfx::ColorDepth aColorDepth,
+      gfx::YUVColorSpace aYUVColorSpace, gfx::ColorRange aColorRange);
+
+  static DXGIYCbCrTextureData* Create(
+      ID3D11Texture2D* aTextureCb, ID3D11Texture2D* aTextureY,
+      ID3D11Texture2D* aTextureCr, const gfx::IntSize& aSize,
+      const gfx::IntSize& aSizeY, const gfx::IntSize& aSizeCbCr,
+      gfx::ColorDepth aColorDepth, gfx::YUVColorSpace aYUVColorSpace,
+      gfx::ColorRange aColorRange);
+
+  bool Lock(OpenMode) override { return true; }
+
+  void Unlock() override {}
+
+  void FillInfo(TextureData::Info& aInfo) const override;
+
+  void SerializeSpecific(SurfaceDescriptorDXGIYCbCr* aOutDesc);
+  bool Serialize(SurfaceDescriptor& aOutDescriptor) override;
+  void GetSubDescriptor(RemoteDecoderVideoSubDescriptor* aOutDesc) override;
+
+  already_AddRefed<gfx::DrawTarget> BorrowDrawTarget() override {
+    return nullptr;
+  }
+
+  void Deallocate(LayersIPCChannel* aAllocator) override;
+
+  bool UpdateFromSurface(gfx::SourceSurface*) override { return false; }
+
+  TextureFlags GetTextureFlags() const override;
+
+  DXGIYCbCrTextureData* AsDXGIYCbCrTextureData() override { return this; }
+
+  gfx::IntSize GetYSize() const { return mSizeY; }
+
+  gfx::IntSize GetCbCrSize() const { return mSizeCbCr; }
+
+  gfx::ColorDepth GetColorDepth() const { return mColorDepth; }
+  gfx::YUVColorSpace GetYUVColorSpace() const { return mYUVColorSpace; }
+  gfx::ColorRange GetColorRange() const { return mColorRange; }
+
+  ID3D11Texture2D* GetD3D11Texture(size_t index) {
+    return mD3D11Textures[index];
+  }
+
+ protected:
+  RefPtr<ID3D11Texture2D> mD3D11Textures[3];
+  RefPtr<IDirect3DTexture9> mD3D9Textures[3];
+  HANDLE mHandles[3];
+  gfx::IntSize mSize;
+  gfx::IntSize mSizeY;
+  gfx::IntSize mSizeCbCr;
+  gfx::ColorDepth mColorDepth;
+  gfx::YUVColorSpace mYUVColorSpace;
+  gfx::ColorRange mColorRange;
+};
+
+/**
+ * TextureSource that provides with the necessary APIs to be composited by a
+ * CompositorD3D11.
+ */
+class TextureSourceD3D11 {
+ public:
+  TextureSourceD3D11() : mFormatOverride(DXGI_FORMAT_UNKNOWN) {}
+  virtual ~TextureSourceD3D11() = default;
+
+  virtual ID3D11Texture2D* GetD3D11Texture() const { return mTexture; }
+  virtual ID3D11ShaderResourceView* GetShaderResourceView();
+
+ protected:
+  virtual gfx::IntSize GetSize() const { return mSize; }
+
+  gfx::IntSize mSize;
+  RefPtr<ID3D11Texture2D> mTexture;
+  RefPtr<ID3D11ShaderResourceView> mSRV;
+  DXGI_FORMAT mFormatOverride;
+};
+
+/**
+ * A TextureSource that implements the DataTextureSource interface.
+ * it can be used without a TextureHost and is able to upload texture data
+ * from a gfx::DataSourceSurface.
+ */
+class DataTextureSourceD3D11 : public DataTextureSource,
+                               public TextureSourceD3D11,
+                               public BigImageIterator {
+ public:
+  /// Constructor allowing the texture to perform texture uploads.
+  ///
+  /// The texture can be used as an actual DataTextureSource.
+  DataTextureSourceD3D11(ID3D11Device* aDevice, gfx::SurfaceFormat aFormat,
+                         TextureFlags aFlags);
+
+  /// Constructor for textures created around DXGI shared handles, disallowing
+  /// texture uploads.
+  ///
+  /// The texture CANNOT be used as a DataTextureSource.
+  DataTextureSourceD3D11(ID3D11Device* aDevice, gfx::SurfaceFormat aFormat,
+                         ID3D11Texture2D* aTexture);
+
+  DataTextureSourceD3D11(gfx::SurfaceFormat aFormat,
+                         TextureSourceProvider* aProvider,
+                         ID3D11Texture2D* aTexture);
+  DataTextureSourceD3D11(gfx::SurfaceFormat aFormat,
+                         TextureSourceProvider* aProvider, TextureFlags aFlags);
+
+  virtual ~DataTextureSourceD3D11();
+
+  const char* Name() const override { return "DataTextureSourceD3D11"; }
+
+  // DataTextureSource
+
+  bool Update(gfx::DataSourceSurface* aSurface,
+              nsIntRegion* aDestRegion = nullptr,
+              gfx::IntPoint* aSrcOffset = nullptr) override;
+
+  // TextureSource
+
+  TextureSourceD3D11* AsSourceD3D11() override { return this; }
+
+  ID3D11Texture2D* GetD3D11Texture() const override;
+
+  ID3D11ShaderResourceView* GetShaderResourceView() override;
+
+  // Returns nullptr if this texture was created by a DXGI TextureHost.
+  DataTextureSource* AsDataTextureSource() override {
+    return mAllowTextureUploads ? this : nullptr;
+  }
+
+  void DeallocateDeviceData() override { mTexture = nullptr; }
+
+  gfx::IntSize GetSize() const override { return mSize; }
+
+  gfx::SurfaceFormat GetFormat() const override { return mFormat; }
+
+  // BigImageIterator
+
+  BigImageIterator* AsBigImageIterator() override {
+    return mIsTiled ? this : nullptr;
+  }
+
+  size_t GetTileCount() override { return mTileTextures.size(); }
+
+  bool NextTile() override { return (++mCurrentTile < mTileTextures.size()); }
+
+  gfx::IntRect GetTileRect() override;
+
+  void EndBigImageIteration() override { mIterating = false; }
+
+  void BeginBigImageIteration() override {
+    mIterating = true;
+    mCurrentTile = 0;
+  }
+
+  RefPtr<TextureSource> ExtractCurrentTile() override;
+
+  void Reset();
+
+ protected:
+  gfx::IntRect GetTileRect(uint32_t aIndex) const;
+
+  std::vector<RefPtr<ID3D11Texture2D> > mTileTextures;
+  std::vector<RefPtr<ID3D11ShaderResourceView> > mTileSRVs;
+  RefPtr<ID3D11Device> mDevice;
+  gfx::SurfaceFormat mFormat;
+  TextureFlags mFlags;
+  uint32_t mCurrentTile;
+  bool mIsTiled;
+  bool mIterating;
+  // Sadly, the code was originally organized so that this class is used both in
+  // the cases where we want to perform texture uploads through the
+  // DataTextureSource interface, and the cases where we wrap the texture around
+  // an existing DXGI handle in which case we should not use it as a
+  // DataTextureSource. This member differentiates the two scenarios. When it is
+  // false the texture "pretends" to not be a DataTextureSource.
+  bool mAllowTextureUploads;
+};
+
+/**
+ * A TextureHost for shared D3D11 textures.
+ */
+class DXGITextureHostD3D11 : public TextureHost {
+ public:
+  DXGITextureHostD3D11(TextureFlags aFlags,
+                       const SurfaceDescriptorD3D10& aDescriptor);
+
+  bool BindTextureSource(CompositableTextureSourceRef& aTexture) override;
+  bool AcquireTextureSource(CompositableTextureSourceRef& aTexture) override;
+
+  void DeallocateDeviceData() override {}
+
+  void SetTextureSourceProvider(TextureSourceProvider* aProvider) override;
+
+  gfx::SurfaceFormat GetFormat() const override { return mFormat; }
+
+  bool Lock() override;
+  void Unlock() override;
+
+  bool LockWithoutCompositor() override;
+  void UnlockWithoutCompositor() override;
+
+  gfx::IntSize GetSize() const override { return mSize; }
+  gfx::YUVColorSpace GetYUVColorSpace() const override {
+    return mYUVColorSpace;
+  }
+  gfx::ColorRange GetColorRange() const override { return mColorRange; }
+
+  already_AddRefed<gfx::DataSourceSurface> GetAsSurface() override;
+
+  void CreateRenderTexture(
+      const wr::ExternalImageId& aExternalImageId) override;
+
+  uint32_t NumSubTextures() override;
+
+  void PushResourceUpdates(wr::TransactionBuilder& aResources,
+                           ResourceUpdateOp aOp,
+                           const Range<wr::ImageKey>& aImageKeys,
+                           const wr::ExternalImageId& aExtID) override;
+
+  void PushDisplayItems(wr::DisplayListBuilder& aBuilder,
+                        const wr::LayoutRect& aBounds,
+                        const wr::LayoutRect& aClip, wr::ImageRendering aFilter,
+                        const Range<wr::ImageKey>& aImageKeys,
+                        PushDisplayItemFlagSet aFlags) override;
+
+  bool SupportsExternalCompositing() override;
+
+ protected:
+  bool LockInternal();
+  void UnlockInternal();
+
+  bool EnsureTextureSource();
+
+  RefPtr<ID3D11Device> GetDevice();
+
+  bool EnsureTexture();
+
+  RefPtr<ID3D11Device> mDevice;
+  RefPtr<ID3D11Texture2D> mTexture;
+  RefPtr<DataTextureSourceD3D11> mTextureSource;
+  gfx::IntSize mSize;
+  WindowsHandle mHandle;
+  gfx::SurfaceFormat mFormat;
+  const gfx::YUVColorSpace mYUVColorSpace;
+  const gfx::ColorRange mColorRange;
+  bool mIsLocked;
+};
+
+class DXGIYCbCrTextureHostD3D11 : public TextureHost {
+ public:
+  DXGIYCbCrTextureHostD3D11(TextureFlags aFlags,
+                            const SurfaceDescriptorDXGIYCbCr& aDescriptor);
+
+  bool BindTextureSource(CompositableTextureSourceRef& aTexture) override;
+  bool AcquireTextureSource(CompositableTextureSourceRef& aTexture) override;
+
+  void DeallocateDeviceData() override {}
+
+  void SetTextureSourceProvider(TextureSourceProvider* aProvider) override;
+
+  gfx::SurfaceFormat GetFormat() const override {
+    return gfx::SurfaceFormat::YUV;
+  }
+
+  gfx::ColorDepth GetColorDepth() const override { return mColorDepth; }
+  gfx::YUVColorSpace GetYUVColorSpace() const override {
+    return mYUVColorSpace;
+  }
+  gfx::ColorRange GetColorRange() const override { return mColorRange; }
+
+  bool Lock() override;
+
+  void Unlock() override;
+
+  gfx::IntSize GetSize() const override { return mSize; }
+
+  already_AddRefed<gfx::DataSourceSurface> GetAsSurface() override {
+    return nullptr;
+  }
+
+  void CreateRenderTexture(
+      const wr::ExternalImageId& aExternalImageId) override;
+
+  uint32_t NumSubTextures() override;
+
+  void PushResourceUpdates(wr::TransactionBuilder& aResources,
+                           ResourceUpdateOp aOp,
+                           const Range<wr::ImageKey>& aImageKeys,
+                           const wr::ExternalImageId& aExtID) override;
+
+  void PushDisplayItems(wr::DisplayListBuilder& aBuilder,
+                        const wr::LayoutRect& aBounds,
+                        const wr::LayoutRect& aClip, wr::ImageRendering aFilter,
+                        const Range<wr::ImageKey>& aImageKeys,
+                        PushDisplayItemFlagSet aFlags) override;
+
+  bool SupportsExternalCompositing() override;
+
+ private:
+  bool EnsureTextureSource();
+
+ protected:
+  RefPtr<ID3D11Device> GetDevice();
+
+  bool EnsureTexture();
+
+  RefPtr<ID3D11Texture2D> mTextures[3];
+  RefPtr<DataTextureSourceD3D11> mTextureSources[3];
+
+  gfx::IntSize mSize;
+  gfx::IntSize mSizeY;
+  gfx::IntSize mSizeCbCr;
+  WindowsHandle mHandles[3];
+  bool mIsLocked;
+  gfx::ColorDepth mColorDepth;
+  gfx::YUVColorSpace mYUVColorSpace;
+  gfx::ColorRange mColorRange;
+};
+
+class CompositingRenderTargetD3D11 : public CompositingRenderTarget,
+                                     public TextureSourceD3D11 {
+ public:
+  CompositingRenderTargetD3D11(
+      ID3D11Texture2D* aTexture, const gfx::IntPoint& aOrigin,
+      DXGI_FORMAT aFormatOverride = DXGI_FORMAT_UNKNOWN);
+
+  const char* Name() const override { return "CompositingRenderTargetD3D11"; }
+
+  TextureSourceD3D11* AsSourceD3D11() override { return this; }
+
+  void BindRenderTarget(ID3D11DeviceContext* aContext);
+
+  gfx::IntSize GetSize() const override;
+
+  void SetSize(const gfx::IntSize& aSize) { mSize = aSize; }
+
+ private:
+  friend class CompositorD3D11;
+  RefPtr<ID3D11RenderTargetView> mRTView;
+};
+
+class SyncObjectD3D11Host : public SyncObjectHost {
+ public:
+  explicit SyncObjectD3D11Host(ID3D11Device* aDevice);
+
+  bool Init() override;
+
+  SyncHandle GetSyncHandle() override;
+
+  bool Synchronize(bool aFallible) override;
+
+  IDXGIKeyedMutex* GetKeyedMutex() { return mKeyedMutex.get(); };
+
+ private:
+  virtual ~SyncObjectD3D11Host() = default;
+
+  SyncHandle mSyncHandle;
+  RefPtr<ID3D11Device> mDevice;
+  RefPtr<IDXGIResource> mSyncTexture;
+  RefPtr<IDXGIKeyedMutex> mKeyedMutex;
+};
+
+class SyncObjectD3D11Client : public SyncObjectClient {
+ public:
+  SyncObjectD3D11Client(SyncHandle aSyncHandle, ID3D11Device* aDevice);
+
+  bool Synchronize(bool aFallible) override;
+
+  bool IsSyncObjectValid() override;
+
+  void EnsureInitialized() override {}
+
+  SyncType GetSyncType() override { return SyncType::D3D11; }
+
+  void RegisterTexture(ID3D11Texture2D* aTexture);
+
+ protected:
+  explicit SyncObjectD3D11Client(SyncHandle aSyncHandle);
+  bool Init(ID3D11Device* aDevice, bool aFallible);
+  bool SynchronizeInternal(ID3D11Device* aDevice, bool aFallible);
+  Mutex mSyncLock;
+  RefPtr<ID3D11Texture2D> mSyncTexture;
+  std::vector<ID3D11Texture2D*> mSyncedTextures;
+
+ private:
+  const SyncHandle mSyncHandle;
+  RefPtr<IDXGIKeyedMutex> mKeyedMutex;
+  const RefPtr<ID3D11Device> mDevice;
+};
+
+class SyncObjectD3D11ClientContentDevice : public SyncObjectD3D11Client {
+ public:
+  explicit SyncObjectD3D11ClientContentDevice(SyncHandle aSyncHandle);
+
+  bool Synchronize(bool aFallible) override;
+
+  bool IsSyncObjectValid() override;
+
+  void EnsureInitialized() override;
+
+ private:
+  RefPtr<ID3D11Device> mContentDevice;
+};
+
+inline uint32_t GetMaxTextureSizeForFeatureLevel(
+    D3D_FEATURE_LEVEL aFeatureLevel) {
+  int32_t maxTextureSize;
+  switch (aFeatureLevel) {
+    case D3D_FEATURE_LEVEL_11_1:
+    case D3D_FEATURE_LEVEL_11_0:
+      maxTextureSize = D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION;
+      break;
+    case D3D_FEATURE_LEVEL_10_1:
+    case D3D_FEATURE_LEVEL_10_0:
+      maxTextureSize = D3D10_REQ_TEXTURE2D_U_OR_V_DIMENSION;
+      break;
+    case D3D_FEATURE_LEVEL_9_3:
+      maxTextureSize = D3D_FL9_3_REQ_TEXTURE2D_U_OR_V_DIMENSION;
+      break;
+    default:
+      maxTextureSize = D3D_FL9_1_REQ_TEXTURE2D_U_OR_V_DIMENSION;
+  }
+  return maxTextureSize;
+}
+
+uint32_t GetMaxTextureSizeFromDevice(ID3D11Device* aDevice);
+void ReportTextureMemoryUsage(ID3D11Texture2D* aTexture, size_t aBytes);
+
+class AutoLockD3D11Texture {
+ public:
+  explicit AutoLockD3D11Texture(ID3D11Texture2D* aTexture);
+  ~AutoLockD3D11Texture();
+
+ private:
+  RefPtr<IDXGIKeyedMutex> mMutex;
+};
+
+class D3D11MTAutoEnter {
+ public:
+  explicit D3D11MTAutoEnter(already_AddRefed<ID3D10Multithread> aMT)
+      : mMT(aMT) {
+    if (mMT) {
+      mMT->Enter();
+    }
+  }
+  ~D3D11MTAutoEnter() {
+    if (mMT) {
+      mMT->Leave();
+    }
+  }
+
+ private:
+  RefPtr<ID3D10Multithread> mMT;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif /* MOZILLA_GFX_TEXTURED3D11_H */