1 files changed, 64 insertions, 0 deletions
diff --git a/gfx/layers/ipc/CompositableTransactionParent.h b/gfx/layers/ipc/CompositableTransactionParent.h
new file mode 100644
index 0000000000..172c6bb035
--- /dev/null
+++ b/gfx/layers/ipc/CompositableTransactionParent.h
@@ -0,0 +1,64 @@
+/* -*- 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_LAYERS_COMPOSITABLETRANSACTIONPARENT_H
+#define MOZILLA_LAYERS_COMPOSITABLETRANSACTIONPARENT_H
+
+#include <vector>                // for vector
+#include "mozilla/Attributes.h"  // for override
+#include "mozilla/NotNull.h"
+#include "mozilla/layers/ISurfaceAllocator.h"  // for ISurfaceAllocator
+#include "mozilla/layers/LayersMessages.h"     // for EditReply, etc
+#include "mozilla/layers/TextureClient.h"
+#include "CompositableHost.h"
+
+namespace mozilla {
+namespace layers {
+
+// Since PCompositble has two potential manager protocols, we can't just call
+// the Manager() method usually generated when there's one manager protocol,
+// so both manager protocols implement this and we keep a reference to them
+// through this interface.
+class CompositableParentManager : public HostIPCAllocator {
+ public:
+  CompositableParentManager() = default;
+
+  void DestroyActor(const OpDestroy& aOp);
+
+  void UpdateFwdTransactionId(uint64_t aTransactionId) {
+    MOZ_ASSERT(mFwdTransactionId < aTransactionId);
+    mFwdTransactionId = aTransactionId;
+  }
+
+  uint64_t GetFwdTransactionId() { return mFwdTransactionId; }
+
+  RefPtr<CompositableHost> AddCompositable(const CompositableHandle& aHandle,
+                                           const TextureInfo& aInfo);
+  RefPtr<CompositableHost> FindCompositable(const CompositableHandle& aHandle);
+
+ protected:
+  /**
+   * Handle the IPDL messages that affect PCompositable actors.
+   */
+  bool ReceiveCompositableUpdate(const CompositableOperation& aEdit);
+  bool ReceiveCompositableUpdate(const CompositableOperationDetail& aDetail,
+                                 NotNull<CompositableHost*> aCompositable,
+                                 const CompositableHandle& aHandle);
+
+  void ReleaseCompositable(const CompositableHandle& aHandle);
+
+  uint64_t mFwdTransactionId = 0;
+
+  /**
+   * Mapping form IDs to CompositableHosts.
+   */
+  std::map<uint64_t, RefPtr<CompositableHost>> mCompositables;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif