1 files changed, 126 insertions, 0 deletions
diff --git a/gfx/layers/composite/CompositableHost.h b/gfx/layers/composite/CompositableHost.h
new file mode 100644
index 0000000000..d34e3677ba
--- /dev/null
+++ b/gfx/layers/composite/CompositableHost.h
@@ -0,0 +1,126 @@
+/* -*- 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_BUFFERHOST_H
+#define MOZILLA_GFX_BUFFERHOST_H
+
+#include <stdint.h>              // for uint64_t
+#include <stdio.h>               // for FILE
+#include "gfxRect.h"             // for gfxRect
+#include "mozilla/Assertions.h"  // for MOZ_ASSERT, etc
+#include "mozilla/Attributes.h"  // for override
+#include "mozilla/RefPtr.h"      // for RefPtr, RefCounted, etc
+// #include "mozilla/gfx/MatrixFwd.h"  // for Matrix4x4
+#include "mozilla/gfx/Polygon.h"  // for Polygon
+#include "mozilla/gfx/Rect.h"     // for Rect
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/layers/CompositorTypes.h"  // for TextureInfo, etc
+// #include "mozilla/layers/LayersTypes.h"      // for LayerRenderState, etc
+#include "mozilla/layers/LayersMessages.h"
+#include "mozilla/layers/TextureHost.h"  // for TextureHost
+#include "nsCOMPtr.h"                    // for already_AddRefed
+#include "nscore.h"                      // for nsACString
+#include "Units.h"                       // for CSSToScreenScale
+
+namespace mozilla {
+
+namespace layers {
+
+class WebRenderImageHost;
+
+struct ImageCompositeNotificationInfo {
+  base::ProcessId mImageBridgeProcessId;
+  ImageCompositeNotification mNotification;
+};
+
+struct AsyncCompositableRef {
+  AsyncCompositableRef() : mProcessId(base::kInvalidProcessId) {}
+  AsyncCompositableRef(base::ProcessId aProcessId,
+                       const CompositableHandle& aHandle)
+      : mProcessId(aProcessId), mHandle(aHandle) {}
+  explicit operator bool() const { return !!mHandle; }
+  base::ProcessId mProcessId;
+  CompositableHandle mHandle;
+};
+
+/**
+ * The compositor-side counterpart to CompositableClient. Responsible for
+ * updating textures and data about textures from IPC and how textures are
+ * composited (tiling, double buffering, etc.).
+ *
+ * Update (for images/canvases) and UpdateThebes (for Thebes) are called during
+ * the layers transaction to update the Compositbale's textures from the
+ * content side. The actual update (and any syncronous upload) is done by the
+ * TextureHost, but it is coordinated by the CompositableHost.
+ *
+ * Composite is called by the owning layer when it is composited.
+ * CompositableHost will use its TextureHost(s) and call Compositor::DrawQuad to
+ * do the actual rendering.
+ */
+class CompositableHost {
+ protected:
+  virtual ~CompositableHost();
+
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositableHost)
+  explicit CompositableHost(const TextureInfo& aTextureInfo);
+
+  static already_AddRefed<CompositableHost> Create(
+      const TextureInfo& aTextureInfo);
+
+  virtual WebRenderImageHost* AsWebRenderImageHost() { return nullptr; }
+
+  virtual void Dump(std::stringstream& aStream, const char* aPrefix = "",
+                    bool aDumpHtml = false) {}
+  static void DumpTextureHost(std::stringstream& aStream,
+                              TextureHost* aTexture);
+
+  struct TimedTexture {
+    CompositableTextureHostRef mTexture;
+    TimeStamp mTimeStamp;
+    gfx::IntRect mPictureRect;
+    int32_t mFrameID;
+    int32_t mProducerID;
+  };
+  virtual void UseTextureHost(const nsTArray<TimedTexture>& aTextures);
+  virtual void RemoveTextureHost(TextureHost* aTexture);
+
+  // Enable remote texture push callback
+  virtual void EnableRemoteTexturePushCallback(
+      const RemoteTextureOwnerId aOwnerId, const base::ProcessId aForPid,
+      const gfx::IntSize aSize, const TextureFlags aFlags) = 0;
+  // Called from RemoteTextureMap when a new remote texture is pushed
+  virtual void NotifyPushTexture(const RemoteTextureId aTextureId,
+                                 const RemoteTextureOwnerId aOwnerId,
+                                 const base::ProcessId aForPid) = 0;
+
+  uint64_t GetCompositorBridgeID() const { return mCompositorBridgeID; }
+
+  const AsyncCompositableRef& GetAsyncRef() const { return mAsyncRef; }
+  void SetAsyncRef(const AsyncCompositableRef& aRef) { mAsyncRef = aRef; }
+
+  void SetCompositorBridgeID(uint64_t aID) { mCompositorBridgeID = aID; }
+
+  /// Called when shutting down the layer tree.
+  /// This is a good place to clear all potential gpu resources before the
+  /// widget is is destroyed.
+  virtual void CleanupResources() {}
+
+  virtual void OnReleased() {}
+
+  virtual uint32_t GetDroppedFrames() { return 0; }
+
+ protected:
+ protected:
+  TextureInfo mTextureInfo;
+  AsyncCompositableRef mAsyncRef;
+  uint64_t mCompositorBridgeID;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif